CN106714295B - Data transmission method and device - Google Patents
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- 230000000977 initiatory effect Effects 0.000 claims description 3
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a data transmission method and a device, comprising the following steps: when User Equipment (UE) receives data scheduling information sent by a base station, the UE enters an uplink synchronization state, and an uplink synchronization timer (TAT) is started in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode; and the UE transmits data in the auxiliary serving cell according to the data scheduling information. By the scheme, the UE can quickly enter the synchronous state and perform data transmission without executing a random access process, and can efficiently manage the synchronous state and improve the utilization rate of unauthorized carrier resources.
Description
Technical Field
The present invention relates to wireless communication technologies, and in particular, to a data transmission method and apparatus.
Background
In a Long Term Evolution (LTE) system, in order to achieve and maintain uplink synchronization between User Equipment (UE) and a base station, the base station sends Timing Advance (TA) to each UE according to transmission delay between the base station and each UE, and the UE advances its uplink transmission time according to the TA sent by the base station, thereby compensating for transmission delay from the UE to the base station, so that uplink signals of different UEs all reach the base station within a reception window of the base station. The uplink synchronization is acquired by the UE through executing a random access procedure, and the UE acquires a TA sent by the base station, where the TA is mainly used for determining an uplink data sending time by the UE. Since a cell in an LTE system has only one carrier, there is only one TA. The general procedure for UE data reception is: the UE receives scheduling information sent by the base station, where the scheduling information is sent through a Physical Downlink Control Channel (PDCCH), and includes time-frequency domain information of a scheduling resource and a specific address of a data block in a Physical Downlink Shared Channel (PDSCH), and the UE receives data on the PDSCH according to the scheduling information. The general procedure for UE data transmission is: the UE receives scheduling information sent by the base station, the scheduling information is sent through the PDCCH and comprises time-frequency domain information of scheduling resources and specific addresses of PDSCH (physical downlink shared channel) capable of sending data blocks, and the UE sends data on the PDSCH according to the scheduling information.
In order to maintain uplink synchronization between the UE and the base station, the base station configures an uplink synchronization timer (TAT) for the UE, and if the UE can receive a TA sent to the UE by the base station before the TAT times out, the UE is considered to maintain uplink synchronization with the base station, otherwise, the UE is considered to lose uplink synchronization. In an unsynchronized state or an out-of-synchronization state, the UE obtains uplink synchronization with the base station through a Random Access process, starts a timer TAT after receiving a Random Access Response (Random Access Response) sent by the base station, and advances the uplink transmission time according to the TA carried by the base station in the Random Access Response. After the UE obtains the uplink synchronization with the base station, in the running period of the TAT, if a TA Command (Time Alignment Command) sent to the UE by the base station is received, the TAT is restarted, the TA carried in the TA Command is used for advancing the uplink transmission Time, and the UE is considered to be still kept in the uplink synchronization with the base station; if the UE does not receive the TA command during the operation of the TAT, that is, if the TAT is overtime, it is considered that the UE and the base station lose uplink synchronization, all uplink and downlink resources dynamically allocated to the UE need to be deleted, and all Hybrid Automatic Repeat Request (HARQ buffer) data to be sent in uplink are cleared, and a Radio Resource Control (Radio Resource Control, RRC) sublayer is notified to release static/semi-static uplink physical resources allocated to the UE, and then if there is uplink data to be sent, the UE needs to perform random access first to obtain uplink synchronization again.
A Long Term Evolution-advanced (LTE-a) system proposes a Carrier Aggregation technology (CA) for providing a higher data rate to a mobile user. In LTE, the maximum downlink transmission bandwidth supported by the system is 20MHz, and carrier aggregation is to aggregate two or more Component Carriers (CCs) to support a transmission bandwidth greater than 20MHz and maximally not greater than 100 MHz. And the LTE-A UE with the carrier aggregation capability can simultaneously transmit and receive data on a plurality of component carriers. In the LTE-a system, after entering a connected state, the UE may communicate with a source base station through multiple component carriers (also called serving cells, including a Primary Cell (Pcell) and a Secondary Cell (Scell)). In the initial stage of carrier aggregation, the scenario is relatively limited, and the number of serving cells is relatively small, so that one TA is sufficient. In the subsequent stage of carrier aggregation, due to the increase of the data volume, the number of the component carriers to be aggregated is increased, the scenario is also relaxed, and one TA is not applicable, so that multiple TAs are introduced. In the subsequent stage of carrier aggregation (i.e., Rel-11), due to the increase of the data volume, the number of scells increases, for example, to 4, the scenario may also be relaxed, for example, a Remote Radio Head (RRH) is supported, and one TA cannot solve the problem, so that multiple TAs may be introduced. For convenience of management, the serving cells using the same TA are classified into one TA group. At this time, the TA group including Pcell is pTAG (primary TA group), and the TA group not including Pcell is sTAG (secondary TA group).
With the rapid growth of data services, in the near future, the licensed spectrum will not be able to withstand such a huge amount of data, so operators consider deploying LTE in Unlicensed spectrum resources (Unlicensed Carrier) to share data traffic in the licensed carriers through the Unlicensed spectrum. Unlicensed carriers (unlicensed spectrum) refer to spectrum (or carriers) that can be used without authorization under the compliance with government regulations (radio regulations) by a government agency (e.g., the national radio regulatory commission). For example, microwave ovens, remote control toy planes, Wireless mice, Wireless keyboards, Wireless Fidelity (WiFi), and the like all use unlicensed carriers. In some cases, the unlicensed carrier needs to be used by contention. If the base station (including the WiFi access point) does not contend for the resource, the unlicensed carrier cannot be used. The unlicensed carrier and the licensed carrier may be used in a carrier aggregation manner or in a dual connectivity manner, where the unlicensed carrier is generally used as a supplement to data transmission, that is, the licensed carrier is used as the Pcell and the unlicensed carrier is used as the Scell.
At present, under the condition that an auxiliary serving cell uses an unlicensed carrier and TA of other serving cells do not belong to a TA group, when a UE needs to transmit data, the UE is out of synchronization or unsynchronized with an uplink of a base station, the UE needs to acquire uplink synchronization with the base station through a random access process, and can transmit data after entering an uplink synchronization state, and resources contended on the unlicensed carrier are firstly used for uplink synchronization, which is definitely very wasteful.
Disclosure of Invention
In order to solve the technical problem, the invention provides a data transmission method and a data transmission device, which can enable the UE to rapidly enter a synchronous state and perform data transmission without executing a random access process, and improve the utilization rate of unauthorized carrier resources.
In order to achieve the object of the present invention, the present invention provides a data transmission method, including:
when User Equipment (UE) receives data scheduling information sent by a base station, the UE enters an uplink synchronization state, and an uplink synchronization timer (TAT) is started in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
and the UE transmits data in the auxiliary serving cell according to the data scheduling information.
Further, the data scheduling information is first data scheduling information received by the UE in an uplink out-of-step state; the data scheduling information includes: scheduling information for the UE to receive and/or transmit data.
Further, the method also comprises the following steps:
when the current serving cell cannot meet the service requirement of the UE and the base station adds the auxiliary serving cell for the UE according to the measurement report of the UE, the UE configures the auxiliary serving cell according to the configuration information of the auxiliary serving cell;
the base station acquires resource information of the auxiliary serving cell according to a preset mode;
and the base station directly starts to schedule the UE to carry out data transmission in the auxiliary service cell according to the measurement report of the UE and the acquired resource information of the auxiliary service cell.
Further, the method further comprises the following steps:
when the UE is in an uplink synchronization state and the base station finishes using the resources of the auxiliary service cell, the base station executes the step that the base station acquires the resource information of the auxiliary service cell according to a preset mode to acquire the resource information of the auxiliary service cell again;
and the UE keeps an uplink synchronization state after receiving the data scheduling information sent by the base station, and restarts the TAT at the subframe receiving the data scheduling information.
Further, the acquiring, by the base station, the resource information of the serving cell according to a preset manner includes:
and the base station initiates a resource competition process of the auxiliary service cell according to the requirement of the UE traffic to acquire the resource information of the auxiliary service cell.
Further, the acquiring, by the base station, the resource information of the serving cell according to a preset manner includes:
the UE initiates a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell;
and after the UE competes for the resources of the auxiliary serving cell, sending a notification message to the base station, wherein the notification message comprises the resource information of the auxiliary serving cell.
Further, the acquiring, by the base station, the resource information of the serving cell according to a preset manner includes:
the base station instructs the UE to initiate a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell;
and after the UE competes for the resources of the auxiliary serving cell, sending a notification message to the base station, wherein the notification message comprises the resource information of the auxiliary serving cell.
Further, the resource information of the secondary serving cell at least includes: frequency information and time information of the contended unlicensed carrier.
The invention provides a User Equipment (UE), comprising:
a receiving unit, configured to enter an uplink synchronization state after receiving data scheduling information sent by a base station, and start an uplink synchronization timer TAT in a subframe in which the data scheduling information is received, where the data scheduling information is used to schedule the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
and the transmission unit is used for transmitting data in the auxiliary service cell according to the data scheduling information.
Further, the UE further includes:
a configuration unit, configured to, when a current serving cell cannot meet a service requirement of the UE and the base station adds the auxiliary serving cell to the UE according to the measurement report of the UE, configure, by the UE, the auxiliary serving cell according to configuration information of the auxiliary serving cell;
further, the UE further includes:
a competition unit, configured to initiate a resource competition process of the auxiliary serving cell according to a requirement of the UE traffic, and obtain resource information of the auxiliary serving cell;
a notification unit, configured to send a notification message to the base station after the UE contends for the resource of the secondary serving cell, where the notification message includes resource information of the secondary serving cell.
The present invention provides a base station, comprising:
a configuration unit, configured to, when a current serving cell cannot meet a service requirement of a User Equipment (UE), add, by a base station, an auxiliary serving cell to the UE according to a measurement report of the UE; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
an obtaining unit, configured to obtain resource information of the secondary serving cell according to a preset manner;
and the scheduling unit is used for directly starting to schedule the UE to carry out data transmission in the auxiliary service cell according to the measurement report of the UE and the acquired resource information of the auxiliary service cell.
Further, the obtaining unit is specifically configured to:
and initiating a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell.
Further, the acquiring unit includes:
an indicating unit, configured to instruct the UE to initiate a resource contention process of the secondary serving cell according to a requirement of the UE traffic to obtain resource information of the secondary serving cell;
and a receiving unit, configured to receive a notification message sent by the UE, where the notification message includes resource information of the secondary serving cell.
The invention provides a data transmission method and a device, comprising the following steps: when User Equipment (UE) receives data scheduling information sent by a base station, the UE enters an uplink synchronization state, and an uplink synchronization timer (TAT) is started in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode; and the UE transmits data in the auxiliary serving cell according to the data scheduling information. By the scheme, the UE can quickly enter the synchronous state and perform data transmission without executing a random access process, and can efficiently manage the synchronous state and improve the utilization rate of unauthorized carrier resources.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic flow chart of a data transmission method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a first embodiment of the present invention;
FIG. 5 is a schematic flow chart of a second embodiment of the present invention;
fig. 6 is a schematic flow chart of a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
The technical scheme provided by the invention can be used in a Frequency Division Duplex (FDD) mode and a Time Division Duplex (TDD) mode. In the technical scheme provided by the invention, for the secondary serving cell using the unauthorized carrier, the activation \ deactivation mechanism exists, so that the secondary serving cell needs to be activated first and can be scheduled. In addition, the primary serving cell and the secondary serving cell in the present invention may perform carrier aggregation, or perform aggregation in a dual connectivity manner.
An embodiment of the present invention provides a data transmission method, as shown in fig. 1, the method includes:
step 104, when receiving data scheduling information sent by a base station, a User Equipment (UE) enters an uplink synchronization state, and starts an uplink synchronization timer (TAT) in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
and 105, the UE transmits data in the auxiliary serving cell according to the data scheduling information.
Further, the data scheduling information is first data scheduling information received by the UE in an uplink out-of-step state; the data scheduling information includes: scheduling information for the UE to receive and/or transmit data.
Further, before 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 auxiliary serving cell to the UE according to the measurement report of the UE, the UE configures the auxiliary serving cell according to the configuration information of the auxiliary serving cell;
102, the base station acquires resource information of the auxiliary serving cell according to a preset mode;
step 103, the base station directly starts to schedule the UE to perform data transmission in the auxiliary serving cell according to the measurement report of the UE and the acquired resource information of the auxiliary serving cell.
Further, after step 105, the method further comprises:
step 106, when the UE is in an uplink synchronization state and the base station has used up the resource of the secondary serving cell, the base station performs the step of acquiring the resource information of the secondary serving cell by the base station according to a preset mode to acquire the resource information of the secondary serving cell again;
and step 107, after receiving the data scheduling information sent by the base station, the UE maintains the uplink synchronization state, and restarts the TAT in the subframe in which the data scheduling information is received.
Further, step 102 may specifically include:
and the base station initiates a resource competition process of the auxiliary service cell according to the requirement of the UE traffic to acquire the resource information of the auxiliary service cell.
Further, step 102 may further specifically include:
the UE initiates a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell;
and after the UE competes for the resources of the auxiliary serving cell, sending a notification message to the base station, wherein the notification message comprises the resource information of the auxiliary serving cell.
Further, step 102 may further specifically include:
the base station instructs the UE to initiate a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell;
and after the UE competes for the resources of the auxiliary serving cell, sending a notification message to the base station, wherein the notification message comprises the resource information of the auxiliary serving cell.
Further, the resource information of the secondary serving cell at least includes: frequency information and time information of the contended unlicensed carrier.
In the data transmission method provided by the embodiment of the invention, after receiving data scheduling information sent by a base station, User Equipment (UE) enters an uplink synchronization state, and an uplink synchronization timer (TAT) is started in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data in an auxiliary service cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode; and the UE transmits data in the auxiliary serving cell according to the data scheduling information. By the scheme, the UE can quickly enter the synchronous state and perform data transmission without executing a random access process, and can efficiently manage the synchronous state and improve the utilization rate of unauthorized carrier resources.
An embodiment of the present invention provides a UE10, as shown in fig. 2, including:
a receiving unit 11, configured to enter an uplink synchronization state after receiving data scheduling information sent by a base station, and start an uplink synchronization timer TAT in a subframe in which the data scheduling information is received, where the data scheduling information is used to schedule the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
a transmitting unit 12, configured to transmit data in the secondary serving cell according to the data scheduling information.
Further, as shown in fig. 2, the UE10 may further include:
a configuration unit 13, configured to, when a current serving cell cannot meet a service requirement of the UE and the base station adds the auxiliary serving cell to the UE according to the measurement report of the UE, configure, by the UE, the auxiliary serving cell according to configuration information of the auxiliary serving cell;
a competition unit 14, configured to initiate a resource competition process of the auxiliary serving cell according to a requirement of the UE traffic, and obtain resource information of the auxiliary serving cell;
a notifying unit 15, configured to send a notification message to the base station after the UE contends for the resource of the secondary serving cell, where the notification message includes the resource information of the secondary serving cell.
The present embodiment is used to implement the above method embodiments, and the working process and the working principle of each unit in the present embodiment refer to the description in the above method embodiments, which are not described herein again.
In the user equipment provided by the embodiment of the present invention, after receiving data scheduling information sent by a base station, the user equipment UE enters an uplink synchronization state, and starts an uplink synchronization timer TAT in a subframe where the data scheduling information is received, where the data scheduling information is used to schedule the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode; and the UE transmits data in the auxiliary serving cell according to the data scheduling information. By the scheme, the UE can quickly enter the synchronous state and perform data transmission without executing a random access process, and can efficiently manage the synchronous state and improve the utilization rate of unauthorized carrier resources.
An embodiment of the present invention provides a base station 20, as shown in fig. 3, including:
a configuration unit 21, configured to, when a current serving cell cannot meet a service requirement of a user equipment UE, add, by a base station, an auxiliary serving cell to the UE according to a measurement report of the UE; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
an obtaining unit 22, configured to obtain resource information of the secondary serving cell according to a preset manner;
and a scheduling unit 23, configured to directly start scheduling the UE to perform data transmission in the auxiliary serving cell according to the measurement report of the UE and the acquired resource information of the auxiliary serving cell.
Further, the obtaining unit 22 is specifically configured to:
and initiating a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell.
Further, the obtaining unit 22 may include:
an indicating unit 221, configured to instruct the UE to initiate a resource contention process of the secondary serving cell according to a requirement of the UE traffic to obtain resource information of the secondary serving cell;
a receiving unit 222, configured to receive a notification message sent by the UE, where the notification message includes resource information of the secondary serving cell.
The present embodiment is used to implement the above method embodiments, and the working process and the working principle of each unit in the present embodiment refer to the description in the above method embodiments, which are not described herein again.
According to the base station provided by the embodiment of the invention, when the current service cell can not meet the service requirement of User Equipment (UE), the base station adds an auxiliary service cell for the UE according to the measurement report of the UE; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode; the UE adds the auxiliary service cell according to the configuration information of the auxiliary service cell; the base station acquires resource information of the auxiliary serving cell according to a preset mode; the base station directly starts to schedule the UE to carry out data transmission in the auxiliary service cell according to the measurement report of the UE and the acquired resource information of the auxiliary service cell; when the UE receives data scheduling information sent by the auxiliary serving cell, the UE enters an uplink synchronization state, and an uplink synchronization timer TAT is started in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data; and the UE transmits data according to the data scheduling information. By the scheme, the UE can quickly enter the synchronous state and perform data transmission without executing a random access process, and can efficiently manage the synchronous state and improve the utilization rate of unauthorized carrier resources.
In order to make the technical solutions provided by the present invention more clearly understood by those skilled in the art, the technical solutions provided by the present invention are described in detail below by specific examples:
the first embodiment is as follows:
in this embodiment, the UE establishes a connection with the cell 1, the cell 1 is a current serving cell, for example, a main serving cell, the base station configures a plurality of measurement tasks for the UE, for example, measures a plurality of cells, the UE performs measurement according to the measurement tasks, and reports a measurement report according to the configuration of the measurement tasks. As shown in fig. 4, the present embodiment includes the following steps:
the method comprises the following steps: due to the increase of the traffic, the base station adds a cell 2 to the UE according to the measurement report of the UE, the cell 2 and the cell 1 are not in a TA group, the cell 2 is an unauthorized carrier, and the resource use authority needs to be acquired in a competition mode, and the cell 2 is an auxiliary service cell;
step two: UE receives the configuration information of the cell 2 and adds the cell 2;
step three: the base station initiates a resource competition process of the cell 2 according to the requirement of UE traffic;
step four: after the base station competes for the resources of the cell 2, the base station decides to directly start scheduling the UE to transmit and receive data in the cell 2 according to the measurement report of the UE and the acquired resource information of the cell 2 without executing a random access process;
step five: after receiving the first data scheduling information of the cell 2, the UE starts the TAT in the subframe where the first data scheduling information is received, where the first data scheduling information may include: scheduling information for indicating the UE to receive and/or transmit data;
step six: and the UE sends uplink data or receives downlink data according to the data scheduling information.
Step seven: and after the TAT is overtime, the UE enters an out-of-step state and stops sending the uplink data.
Example two
In this embodiment, the UE configures a cell 1 and a cell 2, where the cell 1 is a current serving cell, for example, a primary serving cell, the cell 2 is a secondary serving cell, the cell 2 and the cell 1 are different TA groups, the TAT of the UE on the cell 2 is running, the resource occupied on the cell 2 is already used up, the base station configures a plurality of measurement tasks for the UE, and the UE performs measurement according to the measurement tasks and reports a measurement report according to the configuration of the measurement tasks. As shown in fig. 5, the present embodiment includes the following steps:
the method comprises the following steps: the base station initiates the resource competition process of the cell 2 according to the requirement of UE traffic,
step two: after the base station competes for the resources of the cell 2, the base station decides to directly start scheduling the UE to transmit and receive data in the cell 2 according to the measurement report of the UE and the acquired resource information of the cell 2 without executing a random access process;
step three: 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 where the scheduling information is received, where the data scheduling information may include: scheduling information for indicating the UE to receive and/or transmit data;
step four: and the UE sends uplink data or receives downlink data according to the data scheduling information.
Example three:
in this embodiment, the UE establishes a connection with the cell 1, the cell 1 is a current serving cell, for example, may be a main serving cell, the base station configures a plurality of measurement tasks for the UE, and the UE performs measurement according to the measurement tasks and reports a measurement report according to the configuration of the measurement tasks. As shown in fig. 6, the present embodiment includes the following steps:
the method comprises the following steps: due to the increase of the traffic, the base station adds a cell 2 to the UE according to the measurement report of the UE, the cell 2 and the cell 1 are not in a TA group, the cell 2 is an unauthorized carrier, and the resource use authority needs to be acquired in a competition mode, and the cell 2 is an auxiliary service cell;
in the step one, the base station adds the cell 2 to the UE, and may send the identifier including the cell 2 and the related configuration information, such as carrier frequency, bandwidth, channel configuration, and the like, to the UE.
Step two: UE receives the configuration information of the cell 2 and adds the cell 2;
step three: UE initiates a resource competition process of the cell 2 according to the requirement of the service volume, and informs a base station to perform the resource competition process of the cell 2 through the cell 1;
step four: after the UE contends for the resource of the cell 2, the cell 1 notifies the base station of the resource information of the cell 2 that the UE contends for, where the resource information of the cell 2 may include frequency information of the contended resource, and the time information may include at least one of the following: start time, end time, resource duration length;
step five: after receiving the resource information of the cell 2, the base station starts to schedule the UE to transmit and receive data in the cell 2;
step six: 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, where the first data scheduling information may be scheduling information for receiving or sending data, or only limited to receiving the scheduling information for data, or only limited to sending the scheduling information for data;
step seven: and the UE sends uplink data or receives downlink data according to the data scheduling information.
In the third step of this embodiment, the UE needs to contend for the unlicensed carrier resource, which is determined by the UE itself, or the base station may notify the UE to perform this process.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (12)
1. A method of data transmission, comprising:
when User Equipment (UE) receives data scheduling information sent by a base station, the UE enters an uplink synchronization state, and an uplink synchronization timer (TAT) is started in a subframe receiving the data scheduling information, wherein the data scheduling information is used for scheduling the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
the UE transmits data in the auxiliary serving cell according to the data scheduling information;
when the user equipment UE enters an uplink synchronization state after receiving the data scheduling information sent by the base station, and before the step of starting an uplink synchronization timer TAT in the subframe where the data scheduling information is received, the data transmission method further includes:
when the current serving cell cannot meet the service requirement of the UE and the base station adds the auxiliary serving cell for the UE according to the measurement report of the UE, the UE configures the auxiliary serving cell according to the configuration information of the auxiliary serving cell;
the base station acquires resource information of the auxiliary serving cell according to a preset mode;
and the base station directly starts to schedule the UE to carry out data transmission in the auxiliary service cell according to the measurement report of the UE and the acquired resource information of the auxiliary service cell.
2. The method of 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 information for the UE to receive and/or transmit data.
3. The method of claim 1, further comprising, after the method:
when the UE is in an uplink synchronization state and the base station finishes using the resources of the auxiliary service cell, the base station executes the step that the base station acquires the resource information of the auxiliary service cell according to a preset mode to acquire the resource information of the auxiliary service cell again;
and the UE keeps an uplink synchronization state after receiving the data scheduling information sent by the base station, and restarts the TAT at the subframe receiving the data scheduling information.
4. The method according to claim 1 or 3, wherein the base station acquires the resource information of the serving cell according to a preset manner, including:
and the base station initiates a resource competition process of the auxiliary service cell according to the requirement of the UE traffic to acquire the resource information of the auxiliary service cell.
5. The method according to claim 1 or 3, wherein the base station acquires the resource information of the serving cell according to a preset manner, including:
the UE initiates a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell;
and after the UE competes for the resources of the auxiliary serving cell, sending a notification message to the base station, wherein the notification message comprises the resource information of the auxiliary serving cell.
6. The method according to claim 1 or 3, wherein the base station acquires the resource information of the serving cell according to a preset manner, including:
the base station instructs the UE to initiate a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell;
and after the UE competes for the resources of the auxiliary serving cell, sending a notification message to the base station, wherein the notification message comprises the resource information of the auxiliary serving cell.
7. The method of claim 1, wherein the resource information of the secondary serving cell at least comprises: frequency information and time information of the contended unlicensed carrier.
8. A User Equipment (UE), comprising:
a receiving unit, configured to enter an uplink synchronization state after receiving data scheduling information sent by a base station, and start an uplink synchronization timer TAT in a subframe in which the data scheduling information is received, where the data scheduling information is used to schedule the UE to transmit data in an auxiliary serving cell; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
a transmission unit, configured to transmit data in the secondary serving cell according to the data scheduling information;
the UE further comprises:
and the configuration unit is used for configuring the auxiliary serving cell by the UE according to the configuration information of the auxiliary serving cell when the current serving cell cannot meet the service requirement of the UE and the base station adds the auxiliary serving cell to the UE according to the measurement report of the UE.
9. The UE of claim 8, further comprising:
a competition unit, configured to initiate a resource competition process of the auxiliary serving cell according to a requirement of the UE traffic, and obtain resource information of the auxiliary serving cell;
a notification unit, configured to send a notification message to the base station after the UE contends for the resource of the secondary serving cell, where the notification message includes resource information of the secondary serving cell.
10. A base station, comprising:
a configuration unit, configured to, when a current serving cell cannot meet a service requirement of a User Equipment (UE), add, by a base station, an auxiliary serving cell to the UE according to a measurement report of the UE; the secondary serving cell uses an unlicensed carrier and needs to acquire resources in a contention mode;
an obtaining unit, configured to obtain resource information of the secondary serving cell according to a preset manner;
and the scheduling unit is used for directly starting to schedule the UE to carry out data transmission in the auxiliary service cell according to the measurement report of the UE and the acquired resource information of the auxiliary service cell.
11. The base station of claim 10, wherein the obtaining unit is specifically configured to:
and initiating a resource competition process of the auxiliary service cell according to the requirement of the UE service volume to acquire resource information of the auxiliary service cell.
12. The base station of claim 10, wherein the obtaining unit comprises:
an indicating unit, configured to instruct the UE to initiate a resource contention process of the secondary serving cell according to a requirement of the UE traffic to obtain resource information of the secondary serving cell;
and a receiving unit, configured to receive a notification message sent by the UE, where the notification message includes resource information of the secondary serving cell.
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| CN201510418888.5A CN106714295B (en) | 2015-07-15 | 2015-07-15 | Data transmission method and device |
| PCT/CN2016/076734 WO2016177137A1 (en) | 2015-07-15 | 2016-03-18 | Data transmission method and device |
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| CN110611934A (en) | 2018-06-15 | 2019-12-24 | 索尼公司 | Electronic device, communication method, and storage medium |
| CN112770396B (en) * | 2019-11-04 | 2023-07-21 | 维沃移动通信有限公司 | Information processing method and equipment |
| CN115052373A (en) * | 2021-03-09 | 2022-09-13 | 上海朗帛通信技术有限公司 | Method and arrangement in a communication node used for wireless communication |
| CN113316265B (en) * | 2021-06-11 | 2023-09-01 | Oppo广东移动通信有限公司 | Uplink scheduling task processing method, terminal equipment, storage medium and chip |
| CN117062147A (en) * | 2022-05-07 | 2023-11-14 | 华为技术有限公司 | Data transmission method and device |
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| CN106714295A (en) | 2017-05-24 |
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