WO2017118142A1 - Method and device for communication on unlicensed frequency band - Google Patents

Abstract

A method and device for communication on an unlicensed frequency band. The method comprises: a base station establishing a data service borne on an unlicensed carrier with a user equipment; in a process of the base station performing data transmission with the user equipment, the base station determining whether competition congestion is generated on the unlicensed carrier; and when competition congestion is generated on the unlicensed carrier, the base station adding the maximum number of retransmissions of a hybrid automatic repeat request (HARQ) or increasing the timing length of an RLC retransmission poll timer.

Description

Method and apparatus for communicating over unlicensed frequency bands Technical field

The present disclosure relates to the field of communications technology, for example, to a method and apparatus for communicating over an unlicensed frequency band.

Background technique

With the surge in mobile Internet traffic, the load on operators' 3G and 4G networks is increasing, and it is urgent to expand network capacity. However, there is a serious shortage of existing spectrum resources, and the related licensed frequency bands, especially the low-frequency resources with higher value, are not only limited, but are also rapidly consumed by the rapidly growing user base and mobile Internet services.

Currently, the 5GHz unlicensed band also has a significant portion of the available spectrum, and operators and equipment manufacturers are looking for ways to make full use of the band to increase overall network capacity. The R13 (Release 13) standard developed by the 3rd Generation Partnership Project (3GPP) defines LAA (Licensed-Assisted Access) technology for operating LTE (Long Term Evolution) in an unlicensed band. The LAA technology, that is, the licensed frequency band, assists access to the unlicensed frequency band. Considering that there are many WIFI and other systems in the unlicensed frequency band in related technologies, the design principle of LAA technology is to ensure that devices such as LAA and WIFI coexist fairly and use unlicensed frequency bands equally.

Since the LAA must consider the fair coexistence with WIFI and other systems that use unlicensed bands, the LAA cannot monopolize the unlicensed band, which makes the hybrid automatic repeat reQuest (Hybrid Automatic Repeat reQuest) running well in the original LTE system. HARQ), Radio Link Control (RLC) and other data retransmission mechanisms have performance problems.

3GPP currently defines the relevant LAA technology in TR36.889. The LAA is also expected to be compatible with the LTE carrier aggregation technology. In the LAA, the primary cell (PCell) works in the authorized primary frequency band, and the secondary cell (SCell) operates in the secondary frequency band. If the secondary frequency band is an unlicensed frequency band, This SCell is also an unlicensed carrier (LAA SCell). 3GPP describes two strategies for retransmission of HARQ on unlicensed carriers in TR36.889: One strategy is that an unlicensed carrier undergoes HARQ retransmission during data transmission, and the non-authorization can be performed across carriers. The HARQ retransmission data of the carrier is scheduled to be transmitted to the primary carrier (PCell). This method is not compatible with the current LTE carrier aggregation. Therefore, this strategy is not recommended in the 3GPP standard. Another strategy recommended by the 3GPP is to follow the carrier aggregation protocol. The data transmission and retransmission can only be on the same carrier. When the HARQ data retransmission occurs on the unlicensed carrier, the HARQ retransmission data is still transmitted using the same unlicensed carrier. If several HARQ retransmissions are exceeded. The maximum channel occupation time of the unlicensed carrier, then only waiting to listen before the next conversation (listen-before-talk, When the LBT is contending for this unlicensed carrier resource, the HARQ process is restarted to complete the retransmission on the unlicensed carrier.

In the HARQ retransmission policy of the unlicensed carrier recommended by the 3GPP, the data first transmission and the retransmission are limited to the same carrier resource, and the base station is not always able to be timely because it needs to use the unlicensed carrier fairly with other systems such as WIFI. If the RLC retransmission polling timer of the RLC (AM RLC) in the acknowledgment mode expires and the HARQ still fails to complete the retransmission data transmission, the AM RLC layer is successfully contending for the unlicensed carrier resource. RLC retransmission will be initiated. This strategy is compatible with the carrier aggregation architecture of the 3GPP standard. However, the data continues to be retransmitted on the same unlicensed carrier. Because of the uncertainty of the acquisition of the unlicensed carrier resources, the LAA system is more likely to retransmit over time than the RLC in the LTE system. Instead, it has a larger delay and weight. Passing the price and even triggering an RLC reset.

Since the RLC retransmission is a slow retransmission, it will pay a greater price than the HARQ retransmission, greatly increasing the delay of the user's data transmission and reducing the user data throughput rate. In the carrier aggregation framework, for a user, each carrier has an independent HARQ entity, and each HARQ entity includes multiple HARQ process sets. The TB block received by the HARQ on multiple carriers of a user is sent to the RLC layer and reordered by the RLC. The RLC is not visible to the carrier aggregation, and the TB block received by the RLC may be from a HARQ entity of multiple carriers. Therefore, in the unlicensed carrier HARQ retransmission policy recommended by the 3GPP, if multiple unlicensed carriers of the SCell are configured for the user equipment (User Equipment, UE), as long as the HARQ retransmission carrier resources on one unlicensed carrier are not obtained in time, It is easy to cause the user to retransmit the AM RLC layer or even the RLC retransmission to the maximum number of times to trigger the RLC layer reset, so that only the RLC layer retransmission caused by the underlying transmission resources not being acquired in time (rather than due to air interface quality) is Violating the original intention of the RLC protocol design also greatly reduces the efficiency of data transmission.

Summary of the invention

The present disclosure provides a method and apparatus for communicating on an unlicensed frequency band, which solves the problem of HARQ and RLC retransmission generated when communicating on an unlicensed frequency band, and improves data transmission efficiency.

The present disclosure proposes a method of communicating over an unlicensed frequency band, including the steps of:

The base station and the user equipment establish a data service carried on the unlicensed carrier;

During the data transmission process between the base station and the user equipment, the base station determines whether the unlicensed carrier generates contention congestion;

When the unlicensed carrier generates contention congestion, the base station increases the maximum number of retransmissions of the hybrid automatic repeat request HARQ or increases the timing length of the RLC retransmission polling timer.

The present disclosure also proposes a device for communicating on an unlicensed frequency band, which is applied to a base station, including the industry. A module, a congestion decision module, and a parameter adjustment module, wherein:

The service establishing module is configured to establish, with the user equipment, a data service carried by an unlicensed carrier;

The congestion determination module is configured to determine whether the unlicensed carrier generates contention congestion during data transmission between the base station and the user equipment;

The parameter adjustment module is configured to increase a maximum number of retransmissions of the hybrid automatic repeat request HARQ when the unlicensed carrier generates contention congestion or increase the RLC weight when the radio link control layer protocol RLC is configured in the acknowledge mode The timing length of the polling timer.

The present disclosure also proposes a non-transitory computer readable storage medium storing computer executable instructions for performing the above described method of communicating over an unlicensed carrier.

The method for communicating on an unlicensed carrier provided by the present disclosure, by performing a contention congestion judgment on an unlicensed carrier, when detecting that the unlicensed carrier of the service bearer has certain contention congestion, appropriately increasing the maximum number of retransmissions of the HARQ Or extend the RLC retransmission polling timer, so that the retransmission tries to adopt the HARQ fast retransmission as much as possible, and enhances the tolerance of the RLC retransmission, thereby avoiding the excessive RLC layer caused only by not acquiring the unlicensed carrier resources in time. The necessary retransmission solves the problem of HARQ and RLC retransmission generated when communicating on the unlicensed frequency band, which reduces the user delay and improves the data transmission efficiency.

BRIEF abstract

1 is a flowchart of a method of communicating on an unlicensed frequency band according to a first embodiment of the present disclosure;

2 is a flow chart of a method of communicating on an unlicensed frequency band in accordance with a second embodiment of the present disclosure;

3 is a schematic diagram of signaling interaction of a method for performing communication on an unlicensed frequency band according to a second embodiment of the present disclosure;

4 is a flow chart of a method of communicating on an unlicensed frequency band in accordance with a third embodiment of the present disclosure;

5 is a schematic diagram of signaling interaction of a method for performing communication on an unlicensed frequency band according to a third embodiment of the present disclosure;

6 is a flowchart of a method of communicating on an unlicensed frequency band according to a fourth embodiment of the present disclosure;

7 is a schematic diagram of signaling interaction of a method for performing communication on an unlicensed frequency band according to a fourth embodiment of the present disclosure;

8 is a block diagram showing a system for performing communication on an unlicensed frequency band according to a fifth embodiment of the present disclosure;

9 is a block diagram showing an apparatus for performing communication on an unlicensed frequency band according to a sixth embodiment of the present disclosure;

10 is a block diagram of a congestion decision module of FIG. 9;

FIG. 11 is a structural block diagram of an electronic device according to an embodiment of the present disclosure.

The implementation, functional features, and advantages of the present disclosure will be described in detail with reference to the accompanying drawings.

detailed description

The specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.

In the process of communicating on the unlicensed frequency band, when the base station detects that the unlicensed carrier has certain contention congestion, the base station increases the maximum number of retransmissions of the HARQ of the user or lengthens the timing of the AM RLC retransmission polling timer. So that retransmission occurs as much as possible in the HARQ layer, avoiding excessive unnecessary retransmission of the AM RLC layer affecting system performance. Since the unlicensed carrier can carry the uplink service and the downlink service, the present disclosure simultaneously includes a method for adjusting HARQ or RLC parameters in the uplink service and a method for adjusting the HARQ or RLC parameters in the downlink service. The details are described below by way of specific examples. The features of the following embodiments and embodiments may be combined with each other without conflict.

Embodiment 1

Referring to FIG. 1, a method for communicating on an unlicensed frequency band according to a first embodiment of the present disclosure is provided, including the following steps:

S110. The base station and the user equipment establish a data service that is carried by the unlicensed carrier.

The base station may be an Evolved Universal Terrestrial Radio Access Network (EUTRAN), and the user equipment may be a mobile terminal such as a mobile phone or a tablet computer.

S120. The base station performs data transmission with the user equipment. During the data transmission process, the base station determines whether the unlicensed carrier generates contention congestion. When competitive congestion occurs, step S130 is performed.

The data service includes an uplink service and a downlink service. Correspondingly, the data transmission process includes a process in which the base station sends downlink data to the user equipment and a process in which the user equipment sends uplink data to the base station.

When the base station sends the downlink data to the user equipment, the base station initiates the downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource, the downlink data is sent to the user equipment through the unlicensed carrier; The base station counts at least one of the number of downlink LBTs initiated before successfully competing for the unlicensed carrier resources to transmit the downlink data and the time taken to initiate the downlink LBT before successfully competing for the unlicensed carrier resources for transmitting the downlink data, and The statistic result performs layer 3 filtering; when at least one of the number of downlink LBTs initiated and the time taken to initiate the downlink LBT exceeds a threshold, the base station determines that the unlicensed carrier generates contention congestion, when the number of downlink LBTs initiated and the downlink LBT are initiated. When the threshold is not exceeded, it is determined that the unlicensed carrier does not generate competing congestion. This process of downlink data transmission over an unlicensed carrier will be described in more detail in subsequent embodiments.

When performing uplink data transmission through an unlicensed carrier, there are mainly two scheduling modes. One is the main load The wave scheduling, the base station sends a physical downlink control channel uplink scheduling command (PDCCH UL Grant) on the PCell primary carrier, and the user equipment receives the scheduling command, and then sends the uplink data on the designated unlicensed carrier; One is the same carrier scheduling, and the base station sends an uplink scheduling command (UL Grant) on the same unlicensed carrier. When the user equipment receives the scheduling command, the uplink data is sent on the unlicensed carrier. The two scheduling modes are described in detail below.

The primary carrier scheduling mode is: when the user equipment sends the uplink data to the base station, the base station sends an uplink scheduling command to the user equipment by using the primary carrier; after receiving the scheduling command, the user equipment initiates the uplink LBT on the unlicensed carrier before the uplink data occurs. Competing for the unlicensed carrier resource, when the uplink LBT successfully contends to the unlicensed carrier resource, the downlink data is sent to the base station through the unlicensed carrier, and the number of uplink LBTs initiated before the successful uplink to the unlicensed carrier resource is transmitted. At least one of the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resource for transmitting the uplink data, performing layer 3 filtering on the measurement result, and sending a measurement report to the base station; the base station acquiring the measurement report reported by the user equipment (such as measurement Value), when the measurement report indicates that at least one of the number of uplink LBTs initiated and the time taken to initiate the uplink LBT exceeds a threshold, determining that the unlicensed carrier generates contention congestion, when the number of uplink LBTs initiated and the cost of initiating the uplink LBT Unauthorized carrier when the time does not exceed the threshold There compete congestion. The process of performing uplink data transmission by the unlicensed carrier in the primary carrier scheduling manner will be described in more detail in the following embodiments.

Optionally, the base station initiates measurement control to the user equipment before the base station sends the uplink scheduling command to the user equipment, or the base station and the user equipment establish the data service that is carried by the user equipment, and the user equipment is required to measure the uplink data successfully. Compatible to at least one of the number of uplink LBTs initiated before the unlicensed carrier resources and the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resources for transmitting the uplink data, and configuring corresponding layer three filtering parameters, and requirements The user equipment is configured to report the corresponding event according to the measurement result. For example, when at least one of the number of the uplink LBTs and the time that the uplink LBT is initiated exceeds the threshold, the user equipment is required to report the first event to the base station. When the number of uplink LBTs and the time taken to initiate the uplink LBT does not exceed the threshold, the second event is reported to the base station. At this time, the measurement report reported by the user equipment reports the event information.

The same carrier scheduling mode: when the user equipment sends the uplink data to the base station, the base station initiates the downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource, the unlicensed carrier is applied to the user equipment. Sending an uplink scheduling command; after receiving the uplink scheduling command, the user equipment initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before the uplink data occurs, and the non-authorized carrier resource is successfully authorized when the uplink LBT successfully contends to the unlicensed carrier resource. Carrier sends downlink to base station Data, and measuring at least one of an uplink LBT number initiated before successfully competing for an unlicensed carrier resource to transmit uplink data and a time taken to initiate an uplink LBT before successfully competing for an unlicensed carrier resource for transmitting uplink data, The measurement result is filtered by the layer 3 and sent to the base station. The base station counts the number of downlink LBTs initiated before the non-authorized carrier resources are successfully contending to send the uplink scheduling command, and initiates the downlink before successfully competing for the unlicensed carrier resources to send the uplink scheduling command. At least one of the time spent by the LBT; the base station acquires at least one of the number of uplink LBTs reported by the user equipment and the time taken by the uplink LBT, and the sum of the uplink LBT times and the downlink LBT times and the time and downlink of the uplink LBT When at least one of the sums of time spent by the LBT exceeds the threshold, it is determined that the unlicensed carrier generates competing congestion, when the sum of the uplink LBT times and the downlink LBT times, and the time taken by the uplink LBT and the time taken by the downlink LBT When the sum does not exceed the threshold, it is determined that the unlicensed carrier does not generate competing congestion. The process of performing uplink data transmission by the unlicensed carrier in the same carrier scheduling manner will be described in more detail in the following embodiments.

Optionally, the base station initiates measurement control to the user equipment before the base station sends an uplink scheduling command to the user equipment, or the base station and the user equipment establish a data service procedure for the unlicensed carrier, and the user equipment is required to measure the uplink data to successfully compete. At least one of the number of uplink LBTs initiated before the unlicensed carrier resources and the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resources for transmitting the uplink data, and configuring corresponding layer three filtering parameters, and requiring the user The device configures the measurement result as a periodic measurement report, for example, the user equipment is required to send the measurement result of at least one of the number of times and the time to the base station every preset time.

S130. The base station increases the maximum number of retransmissions of the HARQ or increases the timing length of the RLC retransmission polling timer.

Optionally, when the base station determines that the unlicensed carrier has contention congestion in the process of sending the downlink data to the user equipment, the base station side adjusts the parameters of the HARQ or the RLC. For example, the maximum number of retransmissions of the downlink HARQ of the media access control (MAC) address of the user equipment on the base station side is increased (the user equipment does not need to know the maximum number of retransmissions of the downlink HARQ, and only needs to be based on the received NDI. To determine whether to perform soft combining (retransmission) or to clear the HARQ buffer, so that the retransmission is as fast as possible using HARQ; if the user downlink RLC is configured in the acknowledgment (AM) mode, the downlink of the user service bearer on the base station side is increased. The RLC retransmits the timing length of the polling timer (such as t-PollRetransmit) to enhance the tolerance of the RLC retransmission, and avoids the unnecessary unnecessary weight of the RLC layer caused by the untimely acquisition of the unlicensed carrier resources. pass.

When the user equipment sends uplink data to the base station, the base station determines that the unlicensed carrier has competed. When congestion is congested, an RRC Connection Reconfiguration (RRC Connection Reconfiguration) reconfiguration procedure is initiated to adjust the uplink HARQ or RLC parameters of the user. For example, the uplink HARQ maximum retransmission times of the user equipment side MAC layer is increased, so that the retransmission is as fast as the HARQ fast retransmission. If the user side uplink RLC is configured in the AM mode, the uplink RLC of the service RB configuration is increased. The timing length of the polling timer is transmitted to enhance the tolerance of the RLC retransmission, avoiding excessive unnecessary retransmission of the RLC layer due to untimely acquisition of unlicensed carrier resources.

Optionally, after the maximum number of retransmissions of the HARQ is increased or the timing length of the RLC retransmission polling timer is increased, when the base station detects that the contention of the unlicensed carrier has been cancelled (as in the foregoing LBT times and LBT times) When at least one is less than or equal to the threshold, the initial parameters of the HARQ or RLC are restored. For example, the maximum number of retransmissions of the restored HARQ is an initial value, or the timing length of the RLC retransmission polling timer is restored to an initial value.

Embodiment 2

Referring to FIG. 2 and FIG. 3, a method for communicating on an unlicensed frequency band is provided in the second embodiment of the present disclosure. In this embodiment, the downlink data is transmitted through an unlicensed carrier as an example. In this embodiment, the base station may be an EUTRAN, and the UE represents a user equipment. The method includes the following steps:

S21. The EUTRAN establishes a data service with the UE that is carried by the unlicensed carrier.

In this step S21, the UE and the EUTRAN establish a downlink service bearer on the unlicensed carrier.

S22. Before transmitting the downlink data to the UE, the EUTRAN initiates a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource. When the downlink LBT successfully contends to the unlicensed carrier resource, step S23 is performed.

The downlink data to be sent may be new data that the EUTRAN needs to send to the UE, or may be HARQ retransmission data.

S23. The EUTRAN sends downlink data to the UE by using an unlicensed carrier.

After the downlink LBT successfully contends to the unlicensed carrier resource, the EUTRAN sends downlink data to the UE on the unlicensed carrier.

S24. The EUTRAN counts at least one of NumLBT _DLFailure and LBT _DLTime .

When the downlink LBT successfully contends to the unlicensed carrier resource, ETURAN counts NumLBT _DLFailure , or counts LBT _DLTime , or simultaneously counts NumLBT _DLFailure and LBT _DLTime , and performs layer three filtering on the foregoing statistics. among them:

NumLBT _DLFailure : The number of LBT failures before the EUTRAN initiates the downlink LBT and successfully competes to the unlicensed carrier due to the transmission of the downlink data. In other words, it is the downlink LBT initiated by the EUTRAN before successfully competing for the unlicensed carrier resources for transmitting the downlink data. frequency.

LBT _DLTime : is the time required for EUTRAN to initiate downlink LBT and successfully compete for unlicensed carrier due to the transmission of downlink data. In other words, it is the cost of EUTRAN to initiate downlink LBT before successfully competing for unlicensed carrier resources for transmitting downlink data. time.

For the process of performing layer 3 filtering on the statistics, reference may be made to the layer 3 filtering process described in the 3GPP TS36.331 protocol, and details are not described herein again.

Steps S23 and S24 can also be performed simultaneously.

S25. The EUTRAN performs a contention congestion decision according to at least one of a NumLBT _DLFailure and an LBT _DLTime . When it is determined that the unlicensed carrier generates contention congestion, step S26 is performed; when it is determined that the unlicensed carrier does not generate contention congestion, the process ends.

Optionally, the decision condition that the EUTRAN determines that the unlicensed carrier set carried by the downlink data has a congestion condition is as follows:

Congestion decision condition 1 is

NumLBT _DLFailure -HysLBT _DLFailure >LBT _DLFailure Thresh;

Among them, NumLBT _DLFailure is the number of LBT failures before EUTRAN initiates downlink LBT and successfully competes to the unlicensed carrier due to sending downlink data. HysLBT _DLFailure is the set downlink LBT failure number statistic hysteresis parameter, and LBT _DLFailure Thresh is the set downlink. The threshold for the number of LBT failures (ie, the maximum threshold parameter).

Congestion decision condition 2 is

The LBT _DLTime is the time _required for the EUTRAN to initiate the downlink LBT and successfully compete for the unlicensed carrier due to the transmission of the downlink data. The HysLBT _DLTime is the hysteresis parameter of the set time statistic of the downlink LBT successfully competing for the resource, LBT _DLTime Thresh is the threshold (ie, the maximum threshold parameter) of the time statistic required for the downlink LBT to successfully compete for resources.

When the congestion decision is made, the EUTRAN may consider any one or two of the congestion decision conditions 1 and 2 according to the Quality of Service (QoS). For example, when the congestion judgment condition 1 is satisfied, the competition is judged to be generated; or when the congestion judgment condition 2 is satisfied, the competition is generated; or when the congestion judgment conditions 1 and 2 are simultaneously satisfied, the competition is judged. congestion.

S26. The EUTRAN increases the maximum number of retransmissions of the HARQ or increases the timing length of the RLC retransmission polling timer.

(业务建立时的初始值，一般为4)调整为

根据业务QOS，

一般配置为比初始值稍大即可，如6、8等，主要是在一定程度上增加对非授权载波的竞争容忍度，降低数据丢包，尽量让数据重传发生在HARQ层。Optionally, when the EUTRAN determines that the uplink data of a user is transmitted through the unlicensed carrier to generate contention congestion, the EUTRAN obtains the maximum number of retransmissions of the downlink HARQ of the user at the MAC layer of the EUTRAN side from

(The initial value at the time of business establishment, generally 4) is adjusted to

According to the business QOS,

Generally, it is configured to be slightly larger than the initial value, such as 6, 8, etc., mainly to increase the competition tolerance for unlicensed carriers to a certain extent, reduce data packet loss, and try to make data retransmission occur in the HARQ layer.

(RB建立时配置的初始值)调整为

调整后的值可以比初始值大一些，可以根据业务QOS设定，主要是在一定程度上增加对非授权载波的竞争容忍度，避免RLC层不必要的重传。If the RLC of the downlink data is configured in the AM mode, the EUTRAN sets the timing length of the downlink RLC retransmission polling timer in the service RB bearer from

(the initial value of the RB establishment time) is adjusted to

The adjusted value may be larger than the initial value, and may be set according to the service QOS, mainly to increase the competition tolerance to the unlicensed carrier to a certain extent, and avoid unnecessary retransmission of the RLC layer.

Optionally, after increasing the maximum number of retransmissions of the HARQ or increasing the timing length of the RLC retransmission polling timer, when the EUTRAN detects that the contention of the downlink data of the user through the unlicensed carrier is released, the EUTRAN Then restore the initial parameters of HARQ or RLC.

The decision condition for the congestion cancellation on the unlicensed carrier set carried by the downlink data is as follows:

Congestion release judgment condition 1:

NumLBT _DLFailure +HysLBT _DLFailure <LBT _DLFailure Thresh;

Congestion release judgment condition 2:

When the congestion cancellation decision condition 1 is satisfied, the congestion cancellation decision condition 2 is satisfied, or both the congestion cancellation decision conditions 1 and 2 are satisfied, the EUTRAN decides that the congestion cancellation is performed on the unlicensed carrier set of the UE downlink data bearer.

调整为

(即初始值)；如果该下行数据RLC配置在AM模式上，EUTRAN则将该业务RB承载中的下行RLC重传轮询定时器从

调整为

(即初始值)。The initial parameter of the EUTRAN to recover the HARQ or the RLC may be: the maximum number of retransmissions of the downlink HARQ of the EUTRAN at the MAC layer of the EUTRAN side from the EUTRAN

tweak to

(ie, initial value); if the downlink data RLC is configured in the AM mode, the EUTRAN then retransmits the downlink RLC retransmission polling timer in the service RB bearer from

tweak to

(ie the initial value).

Embodiment 3

Referring to FIG. 4 and FIG. 5, a method for communicating on an unlicensed frequency band is provided in the third embodiment of the present disclosure. In this embodiment, an uplink data transmission is performed in an active carrier scheduling manner by using an unlicensed carrier. The base station may be an EUTRAN, and the UE represents a user equipment, and the method includes the following steps:

S31. The EUTRAN establishes a data service with the UE that is carried by the unlicensed carrier.

In this step S31, the UE and the EUTRAN establish an uplink service bearer on the unlicensed carrier.

S32. The EUTRAN initiates measurement control to the UE, and requires the UE to measure at least one of the NumLBT _ULFailure and the LBT _ULTime , and configure a corresponding reporting event according to the measurement result.

Optionally, the EUTRAN end initiates measurement control to the UE side, and the EUTRAN sends the RRC Connection Reconfiguration message to the UE, where the measConfig cell carried in the message requires the UE to measure at least one of the NumLBT _ULFailure data and the LBT _ULTime data, and The corresponding layer three filtering parameters are configured, and corresponding reporting events are configured according to the measurement results. After receiving the RRC Connection Reconfiguration message, the UE configures the corresponding measurement parameters and returns RRC Connection Reconfiguration Complete to the EUTRAN. among them:

NumLBT _ULFailure : The number of LBT failures before the UE initiates the uplink LBT and successfully _contends to the unlicensed carrier due to the transmission of the uplink data. In other words, it is the downlink LBT initiated by the UE before successfully competing for the unlicensed carrier resources for transmitting the downlink data. frequency.

LBT _ULTime : is the time required for the UE to initiate the uplink LBT and successfully compete for the unlicensed carrier due to the transmission of the uplink data. In other words, it is the cost of the UE to initiate the downlink LBT before successfully competing for the unlicensed carrier resource for transmitting the downlink data. time.

It should be understood that, in addition to separately performing the RRC Connection Reconfiguration reconfiguration process to configure the measurement parameters as in step S32 of this embodiment, the measurement parameters may also be configured in the RRC Connection Setup establishment process when the data service is established in step S31. similar.

S33. The EUTRAN sends an uplink scheduling command to the UE by using the primary carrier.

Optionally, the EUTRAN sends an uplink scheduling command UL Grant to the UE on the PCell primary carrier.

S34. After receiving the uplink scheduling command, the UE initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before transmitting the uplink data. When the uplink LBT successfully contends to the unlicensed carrier resource, step S35 is performed.

S35. The UE sends uplink data to the EUTRAN through an unlicensed carrier.

In step S35, the UE sends uplink service data to the EUTRAN on the unlicensed carrier.

S36. The UE measures at least one of a NumLBT _ULFailure and an LBT _ULTime . It is determined whether the event trigger condition is met; when the event trigger condition is met, step S37 is performed; when the event trigger condition is not met, the process ends.

Optionally, the UE measures at least one of the NumLBT _ULFailure and the LBT _ULTime according to the measured parameters configured in step S32, and performs layer three filtering on the measurement result.

When the following event triggering conditions are met, the UE reports a measurement report to the EUTRAN side.

A1 event trigger condition 1:

NumLBT _ULFailure -HysLBT _ULFailure >LBT _ULFailure Thresh

The NumLBT _ULFailure is the number of LBT failures before the UE initiates the uplink LBT and successfully contends to the unlicensed carrier because the uplink data is sent. The HysLBT _ULFailure is the statistic hysteresis parameter of the uplink LBT failure rate configured for the UE in the measurement control command, LBT _ULFailure Thresh To measure the threshold of the number of uplink LBT failures configured for the UE in the control command.

A1 event trigger condition 2:

The LBT _ULTime is the time _required for the UE to initiate the uplink LBT and successfully compete for the unlicensed carrier due to the transmission of the uplink data. The HysLBT _ULTime is the time statistic required for the uplink LBT configured for the UE to successfully compete for the resource in the measurement control command. Hysteresis parameter, LBT _ULTime Thresh is the threshold value of the time required for the uplink LBT configured for the UE to successfully compete for resources in the measurement control command.

After the A1 event trigger condition 1 is satisfied, the UE reports the A1 event of the NumLBT _ULFailure measurement value to the EUTRAN end; or/and after the A1 event trigger condition 2 is satisfied, the UE reports the A1 event of the LBT _ULTime measurement value to the EUTRAN end.

S37. The UE reports the measurement report to the EUTRAN.

In this embodiment, the measurement report event is A1 and A1 event _{ULTime LBT} ULFailure measured values of the measured values at least one NumLBT.

S38. The EUTRAN performs a competition congestion decision according to the measurement report. When it is determined that the unlicensed carrier generates contention congestion, step S39 is performed; when it is determined that the unlicensed carrier does not generate contention congestion, the process ends.

Optionally, the EUTRAN may receive the N1 event of the NumLBT _ULFailure measurement value or the A1 event of the LBT _ULTime measurement value reported by the UE according to the service QOS requirement, or receive the NumLBT _ULFailure and the LBT _ULTime simultaneously in a time period. When the A1 event of the measured value is reported, it is determined that the UE generates competing congestion when transmitting the uplink data through the unlicensed carrier.

S39. The EUTRAN increases the maximum number of retransmissions of the HARQ or increases the timing length of the RLC retransmission polling timer.

In this step S39, when it is determined that the unlicensed carrier generates contention congestion, the EUTRAN passes the RRC reconfiguration. The process is to adjust the uplink HARQ maximum retransmission times or the RLC retransmission polling timer on the UE side.

(业务建立时的初始值，一般为4)，RLC重传轮询定时器的定时长度为业务建立初始值

(针对上行AM RLC模式)，EUTRAN则发送RRC Connection Reconfiguration消息给UE，通过在此消息中携带MAC-MainConfig信元通知UE将上行业务的HARQ的最大重传次数配置为

或者通过在此消息中携带RLC-Config信元(针对上行AM RLC模式)通知UE将上行业务的RLC定时器的定时长度调整为

从而，在一定程度上增加对非授权载波的竞争容忍度，降低数据丢包，尽量让数据重传发生在HARQ层，避免RLC层不必要的重传。Optionally, it is assumed that the maximum number of uplink HARQ retransmissions on the current UE side is an initial value.

(The initial value of the service establishment is generally 4). The timing length of the RLC retransmission polling timer is the initial value of the service establishment.

(For the uplink AM RLC mode), the EUTRAN sends an RRC Connection Reconfiguration message to the UE, and the MAC-MainConfig cell is carried in the message to notify the UE to configure the maximum number of HARQ retransmissions of the uplink service as

Or by notifying the UE in the message that the RLC-Config cell (for the uplink AM RLC mode) adjusts the timing length of the RLC timer of the uplink service to

Therefore, the competition tolerance of the unlicensed carrier is increased to a certain extent, the data loss is reduced, and data retransmission is generated in the HARQ layer as much as possible to avoid unnecessary retransmission of the RLC layer.

Optionally, after increasing the maximum number of retransmissions of the HARQ or increasing the timing length of the RLC retransmission polling timer, when the EUTRAN detects that the contention of the uplink data of the user through the unlicensed carrier is released, the EUTRAN Then restore the initial parameters of HARQ or RLC.

Optionally, when the EUTRAN receives the A2 event of the NumLBT _ULFAilure measurement value reported by the UE or the A2 event of the LBT _ULTime measurement value, or receives the A2 event report of the NumLBT _ULFailure and LBT _ULTime measurement values simultaneously within a time period. At this time, it is determined that the contention congestion of the UE transmitting the uplink data through the unlicensed carrier has been released. The UE reports the measurement report of the A2 event to the EUTRAN end when the following event triggering condition is met.

A2 event trigger condition 1:

NumLBT _ULFailure +HysLBT _ULFailure <LBT _ULFailure Thresh

A2 event trigger condition 2:

After the A2 event trigger condition 1 is satisfied, the UE reports the A2 event of the NumLBT _ULFailure measurement value to the EUTRAN end; or/and after the A2 event trigger condition 2 is satisfied, the UE reports the A2 event of the LBT _ULTime measurement value to the EUTRAN end.

或者通过在此消息中携带RLC-Config信元(针对上行AM RLC模式)通知UE将 上行业务的RLC定时器的定时长度配置为初始值

The initial parameter of the EUTRAN to recover the HARQ or the RLC may be: the EUTRAN sends an RRC Connection Reconfiguration message to the UE, and the MAC-MainConfig cell is carried in the message to notify the UE to configure the maximum number of retransmissions of the HARQ of the uplink service as the initial value.

Or, by carrying the RLC-Config cell (for the uplink AM RLC mode) in the message, the UE is notified to configure the timing length of the RLC timer of the uplink service as an initial value.

和LBT_ULTime中的至少一个的测量值进行拥塞判决，判决过程类似于第二实施例中的步骤S25。In some embodiments, the measurement report sent by the UE to the EUTRAN may also be directly the measured value of at least one of the NumLBT _ULFailure and the LBT _ULTime , according to the EUTRAN.

A congestion decision is made with the measured value of at least one of the LBT _ULTimes , and the decision process is similar to step S25 in the second embodiment.

In some embodiments, step S32 may be omitted, but in the uplink scheduling command sent by the EUTRAN to the UE through the primary carrier in step S33, the information that requires the UE to measure at least one of NumLBT _ULFailure and LBT _ULTime is carried. Subsequently, the UE and the transmission _NumLBT ULFailure _LBT ULTime EUTRAN measurement report to the at least one value, congestion decision based on measured values of at least _NumLBT ULFailure and _LBT ULTime by a EUTRAN, the decision process is similar to the second embodiment Step S25.

Referring to FIG. 6 and FIG. 7 , a method for communicating on an unlicensed frequency band is provided in the fourth embodiment of the present disclosure. In this embodiment, the uplink data transmission is performed in the same carrier scheduling mode by using an unlicensed carrier. EUTRAN, UE represents a user equipment, and the method includes the following steps:

S41. The EUTRAN establishes a data service carried by the UE with an unlicensed carrier.

In this step S41, the UE and the EUTRAN establish an uplink service bearer on the unlicensed carrier.

S42. The EUTRAN initiates measurement control to the UE, and requests the UE to measure at least one of the NumLBT _ULFailure and the LBT _ULTime , and configures the periodic measurement report according to the measurement result.

Optionally, the EUTRAN end initiates measurement control to the UE side, and the EUTRAN sends the RRC Connection Reconfiguration message to the UE, where the measConfig cell carried in the message requires the UE to measure and configure at least one of the NumLBT _ULFailure and the LBT _ULTime data. Corresponding layer three filter parameters, and the measurement results are configured as periodic measurement reports. After receiving the RRC Connection Reconfiguration message, the UE configures the corresponding measurement parameters and returns RRC Connection Reconfiguration Complete to the EUTRAN. among them:

NumLBT _ULFailure : The number of LBT failures before the UE initiates the uplink LBT and successfully _contends to the unlicensed carrier due to the transmission of the uplink data. In other words, it is the downlink LBT initiated by the UE before successfully competing for the unlicensed carrier resources for transmitting the downlink data. frequency.

LBT _ULTime : is the time required for the UE to initiate the uplink LBT and successfully compete for the unlicensed carrier due to the transmission of the uplink data. In other words, it is the cost of the UE to initiate the downlink LBT before successfully competing for the unlicensed carrier resource for transmitting the downlink data. time.

It should be understood that RRC Connection is initiated separately as in step S42 of the present embodiment. The Reconfiguration reconfiguration process is used to configure the measurement parameters. The measurement parameters may also be configured during the establishment of the RRC Connection Setup when the data service is established in step S41. The two processes are similar.

S43. Before sending the uplink scheduling command to the UE, the EUTRAN initiates a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource. When the downlink LBT successfully contends to the unlicensed carrier resource, step S44 is performed.

In this embodiment, the uplink co-carrier scheduling mode is adopted. Therefore, before the EUTRAN sends an uplink scheduling command on the unlicensed carrier, the downlink LBT needs to be performed on the unlicensed carrier to compete for the carrier resource.

S44. The EUTRAN sends an uplink scheduling command to the UE by using an unlicensed carrier.

After the downlink LBT successfully contends to the unlicensed carrier, the EUTRAN sends an uplink scheduling command (UL Grant) to the UE on the unlicensed carrier.

S45. After receiving the uplink scheduling command, the UE initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before transmitting the uplink data. When the uplink LBT successfully contends to the unlicensed carrier resource, step S46 is performed.

The unlicensed carrier that the UE contends is the same carrier as the unlicensed carrier that the EUTRAN sends the uplink scheduling command.

S46. The UE sends uplink data to the EUTRAN through an unlicensed carrier.

S47. The UE measures at least one of a NumLBT _ULFailure and an LBT _ULTime .

Optionally, the UE measures at least one of the NumLBT _ULFailure and the LBT _ULTime according to the measured parameters configured in step S42, and performs layer three filtering on the measurement result.

和

中的至少一个。S48, EUTRAN statistics

with

At least one of them.

和

中的至少一个进行统计，并对统计结果进行层三滤波。其中：Optional, EUTRAN pair

with

At least one of the statistics is performed, and the statistical result is subjected to layer three filtering. among them:

The number of LBT failures before the EUTRAN initiates the uplink LBT and successfully contends to the unlicensed carrier due to the sending of the uplink scheduling command. In other words, the number of downlink LBTs initiated by the EUTRAN before successfully competing for the unlicensed carrier resources for transmitting the uplink scheduling command. .

为EUTRAN因发送上行调度命令而发起上行LBT并成功竞争到非授权载波前所需要的时间，换句话说，是EUTRAN为发送上行调度命令而成功竞争到非授权载波资源前发起下行LBT所花费的时间。

The time required for the EUTRAN to initiate the uplink LBT and successfully compete for the unlicensed carrier due to the transmission of the uplink scheduling command. In other words, it is the EUTRAN's cost to initiate the downlink LBT before successfully competing for the unlicensed carrier resource for transmitting the uplink scheduling command. time.

Step S48 may also be performed simultaneously with step S44, or before any of steps S45-S47 or simultaneously with any of the steps.

S49. The UE reports a periodic measurement report to the EUTRAN.

In this step S49, the UE reports a periodic measurement report of at least one of the NumLBT _ULFailure and the LBT _ULTime to the EUTRAN.

与

之和，和

与

之和中的至少一个进行竞争拥塞判决。当判决非授权载波产生竞争拥塞时，执行步骤S51；当判决非授权载波没有产生竞争拥塞时，结束流程。S50, EUTRAN according to

versus

And sum, and

versus

At least one of the sums performs a competing congestion decision. When it is determined that the unlicensed carrier generates contention congestion, step S51 is performed; when it is determined that the unlicensed carrier does not generate contention congestion, the process ends.

Optionally, the decision condition that the EUTRAN determines that the unlicensed carrier set carried by the uplink data has a congestion condition is as follows:

Congestion judgment condition 1:

为EUTRAN因发送上行调度命令而发起上行LBT并成功竞争到非授权载波前的LBT失败次数，

为设定的关于上行业务所涉及的LBT失败次数统计量迟滞参数，

为设定的关于上行业务所涉及的LBT失败次数门限值。The NumLBT _ULFailure is the number of LBT failures before the UE initiates the uplink LBT and successfully competes to the unlicensed carrier because the uplink data is sent.

The number of LBT failures before the EUTRAN initiates the uplink LBT and successfully contends to the unlicensed carrier due to the sending of the uplink scheduling command.

For the set lag statistic parameter for the number of LBT failures involved in the uplink service,

The set of LBT failure thresholds for the uplink service.

Congestion judgment condition 2:

为EUTRAN因发送上行调度命令而发起上行LBT并成功竞争到非授权载波前所需要的时间，

为设定的关于上行业务所涉及的LBT所需时间统计量迟滞参数，

为设定的关于上行业务所涉及的LBT所需时间统计量的门限值。The LBT _ULTime is a time required for the UE to initiate an uplink LBT due to the transmission of uplink data and successfully compete for the unlicensed carrier.

The time required for EUTRAN to initiate an uplink LBT and successfully compete for an unlicensed carrier due to the transmission of an uplink scheduling command.

For the set time lag parameter for the LBT involved in the uplink service,

The threshold value for the time statistics required for the LBT involved in the uplink service.

The EUTRAN may consider any one or two of the congestion decision conditions 1 and 2 according to the service QOS when performing the congestion decision. For example, when the congestion judgment condition 1 is satisfied, the competition is judged to be generated; or when the congestion judgment condition 2 is satisfied, the competition is generated; or when the congestion judgment conditions 1 and 2 are simultaneously satisfied, the competition is judged. congestion.

S51. The EUTRAN increases the maximum number of retransmissions of the HARQ or increases the timing length of the RLC retransmission polling timer.

In step S51, when it is determined that the unlicensed carrier generates contention congestion, the EUTRAN passes the RRC reconfiguration. The process is to adjust the uplink HARQ maximum retransmission times or the RLC retransmission polling timer on the UE side.

(业务建立时的初始值，一般为4)，RLC重传轮询定时器的定时长度为业务建立初始值

(针对上行AM RLC模式)，EUTRAN则发送RRC Connection Reconfiguration消息给UE，通过在此消息中携带MAC-MainConfig信元通知UE将上行业务的HARQ的最大重传次数配置为

或者通过在此消息中携带RLC-Config信元(针对上行AM RLC模式)通知UE将上行业务的RLC定时器的定时长度调整为

从而，在一定程度上增加对非授权载波的竞争容忍度，降低数据丢包，尽量让数据重传发生在HARQ层，避免RLC层不必要的重传。Optionally, it is assumed that the maximum number of uplink HARQ retransmissions on the current UE side is an initial value.

(The initial value of the service establishment is generally 4). The timing length of the RLC retransmission polling timer is the initial value of the service establishment.

(For the uplink AM RLC mode), the EUTRAN sends an RRC Connection Reconfiguration message to the UE, and the MAC-MainConfig cell is carried in the message to notify the UE to configure the maximum number of HARQ retransmissions of the uplink service as

Or by notifying the UE in the message that the RLC-Config cell (for the uplink AM RLC mode) adjusts the timing length of the RLC timer of the uplink service to

Therefore, the competition tolerance of the unlicensed carrier is increased to a certain extent, the data loss is reduced, and data retransmission is generated in the HARQ layer as much as possible to avoid unnecessary retransmission of the RLC layer.

Optionally, after increasing the maximum number of retransmissions of the HARQ or increasing the timing length of the RLC retransmission polling timer, when the EUTRAN detects that the contention of the uplink data of the user through the unlicensed carrier is released, the EUTRAN Then restore the initial parameters of HARQ or RLC.

The decision condition for the congestion cancellation on the unlicensed carrier set carried by the uplink data is as follows:

Congestion release judgment condition 1:

Congestion release judgment condition 2:

When the congestion cancellation decision condition 1 is satisfied, the congestion cancellation decision condition 2 is satisfied, or both the congestion cancellation decision conditions 1 and 2 are satisfied, the EUTRAN decides that the congestion cancellation is performed on the unlicensed carrier set of the UE downlink data bearer.

或者通过在此消息中携带RLC-Config信元(针对上行AM RLC模式)通知UE将上行业务的RLC定时器的定时长度配置为初始值

The initial parameter of the EUTRAN to recover the HARQ or the RLC may be: the EUTRAN sends an RRC Connection Reconfiguration message to the UE, and the MAC-MainConfig cell is carried in the message to notify the UE to configure the maximum number of retransmissions of the HARQ of the uplink service as the initial value.

Or, by carrying the RLC-Config cell (for the uplink AM RLC mode) in the message, the UE is notified to configure the timing length of the RLC timer of the uplink service as an initial value.

和LBT_ULTime中的至少一个的信息。 In some embodiments, step S42 may be omitted, but in the uplink scheduling command sent by the EUTRAN to the UE through the unlicensed carrier, the UE is required to perform measurement in step S44.

And at least one of the LBT _ULTimes .

The method for communicating on an unlicensed carrier of the present disclosure, by performing a contention congestion judgment on an unlicensed carrier, when detecting that the unlicensed carrier of the service bearer has certain contention congestion, appropriately increasing the maximum number of retransmissions of the HARQ or extending the retransmission of the RLC The polling timer enables the retransmission to adopt the fast retransmission of the HARQ as much as possible, and enhances the tolerance of the RLC retransmission, thereby avoiding excessive unnecessary retransmission of the RLC layer caused by not acquiring the unlicensed carrier resources in time. The problem of HARQ and RLC retransmission generated when communicating on an unlicensed frequency band is solved, the user delay is reduced, and the data transmission efficiency is improved.

Embodiment 5

Referring to FIG. 8, a system for communicating on an unlicensed frequency band is provided in a fifth embodiment of the present disclosure. The system includes a base station 100 and a user equipment 200. The base station 100 may be an EUTRAN, and the user equipment 200 may be a mobile phone or a tablet. Such as mobile terminals, of course, can also be other terminal devices.

The base station 100 is configured to establish, by the user equipment 200, a data service that is carried by the unlicensed carrier; in the process of data transmission with the user equipment 200, determine whether the unlicensed carrier generates contention congestion; when the unlicensed carrier generates contention congestion, increase the HARQ. The maximum number of retransmissions or the increase in the timing length of the RLC retransmission polling timer (when the RLC is configured in the acknowledgment mode).

The user equipment 200 is configured to establish, by the base station 100, data services carried by the unlicensed carrier, and perform data transmission with the base station 100, including sending uplink data to the base station 100, and receiving downlink data sent by the base station 100.

The data service includes uplink service and downlink service. The uplink service and the downlink service are separately discussed below.

For the downlink service, before the base station 100 sends the downlink data to the user equipment 200, the base station 100 initiates a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource. When the downlink LBT successfully contends to the unlicensed carrier resource, the unlicensed carrier is used. The user equipment 200 transmits downlink data. At the same time, the base station 100 counts the number of downlink LBTs initiated before successfully competing for the unlicensed carrier resources to transmit the downlink data, and the cost of initiating the downlink LBT before successfully competing for the unlicensed carrier resources to transmit the downlink data. At least one of the time and layer 3 filtering of the statistical result; when at least one of the number of downlink LBTs initiated and the time taken to initiate the downlink LBT exceeds a threshold, the base station 100 determines that the unlicensed carrier generates contention congestion. When the number of downlink LBTs initiated and the time taken to initiate the downlink LBT does not exceed the threshold, it is determined that the unlicensed carrier does not generate contention congestion.

When the base station 100 determines that the unlicensed carrier has been subjected to contention congestion, the parameters of the HARQ or RLC are adjusted on the side of the base station 100. For example, the maximum number of retransmissions of the downlink HARQ of the MAC address of the user equipment 200 on the base station 100 side is increased (the user equipment 200 does not need to know the maximum number of retransmissions of the downlink HARQ, and only needs to decide to perform soft combining according to the received NDI ( Retransmit) or empty the HARQ buffer) If the user downlink service RLC is configured in the acknowledgment (AM) mode, the timing length of the downlink RLC retransmission polling timer of the user service bearer on the base station 100 side is increased to enhance the RLC retransmission. Tolerance, avoiding excessive unnecessary retransmission of the RLC layer due to untimely acquisition of unlicensed carrier resources.

There are two main scheduling modes for uplink data transmission through unlicensed carriers in the uplink service. One is the primary carrier scheduling, the base station 100 sends an uplink scheduling command on the PCell primary carrier, and the user equipment 200 receives the scheduling command, and then sends the uplink data on the designated unlicensed carrier; the other is the same carrier scheduling, and the base station 100 is The same unlicensed carrier sends an uplink scheduling command, and when the user equipment 200 receives the scheduling command, the uplink data is sent on the carrier. The two scheduling modes are described in detail below.

The primary carrier scheduling mode: the base station 100 sends an uplink scheduling command to the user equipment 200 through the primary carrier. After receiving the uplink scheduling command, the user equipment 200 initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before the uplink data occurs. When the uplink LBT successfully contends to the unlicensed carrier resource, the downlink data is sent to the base station 100 through the unlicensed carrier, and the number of uplink LBTs initiated before the non-authorized carrier resources are successfully contend for transmitting the uplink data and the uplink data is sent. At least one of the time taken to initiate the uplink LBT before the unlicensed carrier resource is successfully contiguous, and the layer 3 is filtered to send the measurement report to the base station 100; the base station 100 acquires the measurement report reported by the user equipment 200, when the measurement report is received. Indicates that the unlicensed carrier generates contention congestion when at least one of the number of uplink LBTs initiated and the time taken to initiate the uplink LBT exceeds the threshold, and the measurement report indicates the number of uplink LBTs initiated and the time taken to initiate the uplink LBT. If the threshold is not exceeded, the decision that the unlicensed carrier is not generated Fight congestion.

Optionally, before the base station 100 sends an uplink scheduling command to the user equipment 200 or the base station 100 establishes a data service procedure for the unlicensed carrier with the user equipment 200, the base station 100 initiates measurement control to the user equipment 200, and requests the user equipment 200 to measure. At least one of the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources for transmitting the uplink data and the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resources for transmitting the uplink data, and configuring the corresponding layer And the user equipment 200 is required to configure a corresponding reporting event according to the measurement result. For example, when at least one of the number of uplink LBTs initiated and the time taken to initiate the uplink LBT exceeds a threshold, the user equipment 200 is required to be sent to the base station. The user equipment 200 is required to report the second event to the base station 100; the user equipment 200 configures the measurement parameter according to the measurement control. The first event is reported by the user equipment 200 when the number of the uplink LBTs and the time taken to initiate the uplink LBT are not exceeded. At this time, the measurement report reported by the user equipment 200 reports the event information.

The same carrier scheduling mode: the base station 100 initiates a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource. When the downlink LBT successfully contends to the unlicensed carrier resource, the base station 100 sends an uplink scheduling command to the user equipment through the unlicensed carrier; the user equipment 200 receives After the uplink scheduling command is performed, the uplink LBT is initiated on the unlicensed carrier to compete for the unlicensed carrier resource before the uplink data is generated. When the uplink LBT successfully contends to the unlicensed carrier resource, the uplink data is sent to the base station 100 through the unlicensed carrier. Simultaneously measuring at least one of the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources to transmit the uplink data and the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resources for transmitting the uplink data, the measurement result The layer 3 is filtered and sent to the base station 100. The base station 100 collects the number of downlink LBTs that are initiated before the non-authorized carrier resources are successfully contend for transmitting the uplink scheduling command, and initiates the downlink before successfully competing for the unlicensed carrier resources to send the uplink scheduling command. At least one of the time spent by the LBT; the base station 100 is obtained The measurement result reported by the user equipment 200, thereby acquiring at least one of the uplink LBT number and the time taken by the uplink LBT, when the sum of the uplink LBT times and the downlink LBT times and the time taken by the uplink LBT and the time taken by the downlink LBT When at least one of the sum exceeds the threshold, the unlicensed carrier is determined to generate contention congestion. When the sum of the uplink LBT times and the downlink LBT times and the time taken by the uplink LBT and the time taken by the downlink LBT does not exceed the threshold When the value is determined, it is determined that the unlicensed carrier does not generate contention congestion.

Optionally, before the base station 100 sends an uplink scheduling command to the user equipment 200 or the base station 100 establishes a data service procedure for the unlicensed carrier with the user equipment 200, the base station 100 initiates measurement control to the user equipment 200, and requests the user equipment 200 to measure. At least one of the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources for transmitting the uplink data and the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resources for transmitting the uplink data, and configuring the corresponding layer The user equipment 200 is required to configure the measurement result as a periodic measurement report, and the user equipment 200 is required to send the measurement result of at least one of the number of times and the time to the base station every preset time; the user equipment 200 controls according to the measurement. Configure measurement parameters.

When the user equipment 200 sends uplink data to the base station 100, the base station 100 determines that the unlicensed carrier has been subjected to contention congestion, and then initiates an RRC Connection Reconfiguration reconfiguration process to adjust the uplink HARQ or RLC parameters of the user, that is, notify the user equipment 200 to adjust. Upstream HARQ or RLC parameters. For example, the maximum number of retransmissions of the uplink HARQ of the MAC layer of the user equipment 200 is increased, so that the retransmission is as fast as the retransmission of the HARQ; if the uplink RLC of the user equipment 200 is configured in the AM mode, the service RB configuration is increased. The timing length of the uplink RLC retransmission polling timer is to enhance the tolerance of the RLC retransmission, and avoid excessive unnecessary retransmission of the RLC layer due to untimely acquisition of the unlicensed carrier resources.

Optionally, after the maximum number of retransmissions of the HARQ is increased or the timing length of the RLC retransmission polling timer is increased, when the base station 100 detects that the contention of the unlicensed carrier has been cancelled (such as the foregoing LBT times and the LBT time) When at least one of the thresholds is less than or equal to the threshold value, the initial parameters of the HARQ or RLC are restored. For example, the maximum number of retransmissions of the restored HARQ is an initial value, or the timing length of the LC retransmission polling timer is restored to an initial value.

The system for communicating on the unlicensed frequency band is similar to the method embodiment for communicating on the unlicensed frequency band. The implementation process is described in detail in the method embodiment, and the technical features in the method embodiment are corresponding in the system embodiment. Applicable, no more details here.

The system for communicating on the unlicensed carrier of the present disclosure, by performing a contention congestion judgment on the unlicensed carrier, when detecting that the unlicensed carrier of the service bearer has certain contention congestion, appropriately increasing the maximum number of retransmissions of the HARQ or extending the RLC retransmission The polling timer enables the retransmission to adopt the fast retransmission of the HARQ as much as possible, and enhances the tolerance of the RLC retransmission, thereby avoiding excessive unnecessary retransmission of the RLC layer caused by not acquiring the unlicensed carrier resources in time. The problem of HARQ and RLC retransmission generated when communicating on an unlicensed frequency band is solved, the user delay is reduced, and the data transmission efficiency is improved.

Embodiment 6

Referring to FIG. 9, an apparatus for communicating on an unlicensed frequency band is provided in a sixth embodiment of the present disclosure. The apparatus is applied to the foregoing base station, where the apparatus includes a service establishment module 110, a congestion decision module 120, and a parameter adjustment module 130, where:

The service establishment module 110 is configured to establish, with the user equipment, a data service carried by the unlicensed carrier, where the data service includes an uplink service and a downlink service.

The congestion decision module 120 is configured to determine whether the unlicensed carrier generates contention congestion during data transmission between the base station and the user equipment.

As shown in FIG. 10, the congestion decision module 120 includes a transmitting unit 121, a statistics unit 122, and a decision unit 123.

In the downlink business process:

The sending unit 121 is configured to: when the downlink data is sent to the user equipment, the LBT is initiated on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource, the unlicensed carrier is sent to the user equipment by using the unlicensed carrier. Downstream data;

The statistic unit 122 is configured to count at least the number of downlink LBTs initiated before successfully competing for the unlicensed carrier resources for transmitting the downlink data and at least the time taken to initiate the downlink LBT before successfully competing for the unlicensed carrier resources for transmitting the downlink data. One;

The determining unit 123 is configured to: when the at least one of the number of times and the time counted by the statistical unit exceeds the threshold, determine that the unlicensed carrier generates contention congestion, and when the number of statistics and the time of the statistical unit do not exceed the threshold, the judgment station The unlicensed carrier does not generate competing congestion.

In the uplink service process, when uplink data transmission is performed through an unlicensed carrier, there are mainly two scheduling modes. One is primary carrier scheduling, and the base station sends an uplink scheduling command on the PCell primary carrier. When the user equipment receives the scheduling command, it sends uplink data on the designated unlicensed carrier. The other is the same carrier scheduling, and the base station is in the same non- The authorized carrier sends an uplink scheduling command, and when the user equipment receives the scheduling command, the uplink data is sent on the carrier. The two scheduling modes are described in detail below.

When performing primary carrier scheduling in the uplink service:

The sending unit 121 is configured to send an uplink scheduling command to the user equipment by using the primary carrier, so that the user equipment initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before transmitting the downlink data, and measures to successfully transmit the uplink data. At least one of an uplink LBT number initiated before an unlicensed carrier resource and a time taken to initiate an uplink LBT before successfully competing for the unlicensed carrier resource to transmit uplink data;

The determining unit 122 is configured to obtain the measurement report reported by the user equipment, and when the measurement report indicates that at least one of the uplink LBT number and the time taken by the uplink LBT exceeds the threshold, determining that the unlicensed carrier generates contention congestion, when the measurement report indicates When the number of uplink LBTs and the time taken by the uplink LBT does not exceed the threshold, it is determined that the unlicensed carrier does not generate contention congestion.

When performing the same carrier scheduling in the uplink service:

The sending unit 121 is configured to: when the user equipment sends the uplink data to the base station, initiate a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource, the unlicensed carrier is used to the user equipment. Sending an uplink scheduling command, so that the user equipment initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before transmitting the downlink data, and measures the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resource to send the uplink data. And at least one of a time taken to initiate an uplink LBT before successfully competing for an unlicensed carrier resource for transmitting uplink data;

The statistic unit 122 is configured to count the number of downlink LBTs initiated before successfully competing for the unlicensed carrier resources to send the uplink scheduling command, and the time taken to initiate the downlink LBT before successfully competing for the unlicensed carrier resources to send the uplink scheduling command. At least one;

The determining unit 123 is configured to acquire the number of uplink LBTs reported by the user equipment and the time taken by the uplink LBT, and the sum of the uplink LBT times and the downlink LBT times and the time taken by the uplink LBT and the time taken by the downlink LBT. When at least one threshold is exceeded, the unlicensed carrier is judged to generate competition If the sum of the uplink LBT times and the downlink LBT times and the time taken by the uplink LBT and the time taken by the downlink LBT does not exceed the threshold, it is determined that the unlicensed carrier does not generate contention congestion.

The parameter adjustment module 130 is configured to increase the maximum number of retransmissions of the HARQ or increase the timing length of the RLC retransmission polling timer when the unlicensed carrier generates contention congestion (when the RLC is configured in the acknowledge mode).

Optionally, when the congestion determination module 120 determines that the unlicensed carrier has been subjected to contention congestion in the downlink service process, the parameter adjustment module 130 adjusts the parameters of the HARQ or the RLC on the base station side. For example, increasing the maximum number of retransmissions of the downlink HARQ of the MAC address of the user equipment on the base station side, so that the retransmission is as fast as possible, and if the downlink service RLC is configured in the acknowledgment mode, the user service bearer on the base station side is increased. The downlink RLC retransmits the timing length of the polling timer to enhance the tolerance of the RLC retransmission, avoiding excessive unnecessary retransmission of the RLC layer due to untimely acquisition of unlicensed carrier resources.

When the congestion decision module 120 determines that the unlicensed carrier has been competing for congestion, the parameter adjustment module 130 initiates an RRC Connection Reconfiguration reconfiguration process to adjust the uplink HARQ or RLC parameters of the user. For example, the number of the maximum number of retransmissions of the uplink HARQ of the MAC layer of the user equipment is increased, so that the retransmission of the retransmission is as fast as possible by the HARQ; if the uplink RLC of the user equipment is configured in the acknowledgment mode, the uplink RLC of the service RB configuration is increased. The timing length of the retransmission timer is retransmitted to enhance the tolerance of the RLC retransmission and avoid excessive unnecessary retransmission of the RLC layer due to untimely acquisition of unlicensed carrier resources.

Optionally, the device further includes a measurement control module 140, optionally:

When the primary carrier scheduling is used in the uplink service process, the measurement control module 140 is configured to: before the sending unit 121 of the congestion determining module 120 sends an uplink scheduling command to the user equipment, or the service establishing module 110 and the user equipment establish the bearer on the unlicensed carrier. In the data service process, the measurement control is initiated to the user equipment, and the user equipment is required to measure the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources to transmit the uplink data, and to initiate the non-authorized carrier resources before successfully transmitting the uplink data. At least one of the time taken by the uplink LBT, and configuring a corresponding reporting event according to the measurement result. For example, when at least one of the number of uplink LBTs and the time taken to initiate the uplink LBT exceeds a threshold, the user equipment is required to report the first event to the base station, the number of uplink LBTs initiated, and the time taken to initiate the uplink LBT. When the threshold is not exceeded, the second event is reported to the base station. At this time, the measurement report reported by the user equipment reports the event information.

When the same carrier scheduling is used in the uplink service process, the measurement control module 140 is configured to: before the sending unit 121 of the congestion determining module 120 sends an uplink scheduling command to the user equipment or the service establishing module. In the process of establishing a data service carried by the user equipment in the unlicensed carrier, the user equipment initiates measurement control to the user equipment, and the user equipment is required to measure the number of uplink LBTs initiated before the non-authorized carrier resources are successfully contend for transmitting the uplink data, and the uplink is sent. The data is at least one of the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resource, and the measurement result is configured as a periodic measurement report.

Optionally, after the parameter adjustment module 130 increases the maximum number of retransmissions of the HARQ or increases the timing length of the RLC retransmission polling timer, when the congestion determination module 120 detects that the contention of the unlicensed carrier has been cancelled (as described above) When at least one of the LBT number and the LBT time is less than or equal to the threshold value, the parameter adjustment module 120 restores the initial parameters of the HARQ or RLC. For example, the maximum number of retransmissions of the restored HARQ is an initial value, or the timing length of the RLC retransmission polling timer is restored to an initial value.

The apparatus for communicating on the unlicensed carrier of the present disclosure, by performing a contention congestion judgment on the unlicensed carrier, when detecting that the unlicensed carrier of the service bearer has certain contention congestion, appropriately increasing the maximum number of retransmissions of the HARQ or extending the retransmission of the RLC The polling timer enables the retransmission to adopt the fast retransmission of the HARQ as much as possible, and enhances the tolerance of the RLC retransmission, thereby avoiding excessive unnecessary retransmission of the RLC layer caused by not acquiring the unlicensed carrier resources in time. The problem of HARQ and RLC retransmission generated when communicating on an unlicensed frequency band is solved, the user delay is reduced, and the data transmission efficiency is improved.

The device for communicating on the unlicensed frequency band is similar to the method embodiment for communicating on the unlicensed frequency band. The implementation process is described in detail in the method embodiment, and the technical features in the method embodiment are applicable in the device embodiment. , no longer repeat them here.

It will be understood by those skilled in the art that all or part of the steps of the foregoing embodiments may be implemented by a program to control related hardware, and the program may be stored in a computer readable storage medium, the storage medium. It can be ROM/RAM, magnetic disk, optical disk, and the like.

The embodiment of the present disclosure further provides a non-transitory computer readable storage medium storing computer executable instructions for performing the method of communicating on an unlicensed frequency band as described in the foregoing embodiments.

FIG. 11 is a structural block diagram of an electronic device according to an embodiment of the present disclosure. The electronic device provided by the embodiment of the present disclosure may include a processor 111 and a memory 113, and may further include a communication interface 112 and a bus 114. The processor 111, the communication interface 112, and the memory 113 can complete communication with each other through the bus 114. Communication interface 112 can be used for information transfer. The processor 111 can invoke logic instructions in the memory 113 to perform the method of communicating over the unlicensed frequency band of the above-described embodiments.

In addition, the logic instructions in the memory 113 described above may be implemented in the form of a software functional unit and sold or used as a stand-alone product, and may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network) The device or the like) performs all or part of the steps of the method described in various embodiments of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like. A medium that can store program code, or a transitory storage medium.

Industrial applicability

The embodiment of the present disclosure enables the retransmission to adopt the fast retransmission of the HARQ as much as possible, and enhances the tolerance of the RLC retransmission, thereby avoiding excessive unnecessary retransmission of the RLC layer caused by not acquiring the unlicensed carrier resources in time. The HARQ and RLC retransmission problems generated when communicating on unlicensed frequency bands reduce user delay and improve data transmission efficiency.

Claims (13)

A method of communicating over an unlicensed frequency band, comprising: The base station and the user equipment establish a data service carried on the unlicensed carrier; During the data transmission process between the base station and the user equipment, the base station determines whether the unlicensed carrier generates contention congestion; When the unlicensed carrier generates contention congestion, the base station increases the maximum number of retransmissions of the hybrid automatic repeat request HARQ or increases the timing length of the radio link control layer protocol RLC retransmission polling timer. The method of communicating on an unlicensed frequency band according to claim 1, wherein in the data transmission process between the base station and the user equipment, the base station determines whether the unlicensed carrier generates contention congestion, including: When the base station sends downlink data to the user equipment, the base station listens to the LBT to compete for the unlicensed carrier resource before initiating a downlink session on the unlicensed carrier, and when the downlink LBT successfully contends to the unlicensed carrier Transmitting, by the unlicensed carrier, the downlink data to the user equipment; The base station counts the number of downlink LBTs initiated before the non-authorized carrier resources are successfully contending to transmit the downlink data, and the cost of initiating the downlink LBT before successfully competing for the unlicensed carrier resources to send the downlink data. At least one of the time; When the at least one of the number of times and the time exceeds a threshold, the base station determines that the unlicensed carrier generates contention congestion; when the number of times and the time do not exceed a threshold, the method is determined Unlicensed carriers do not generate competing congestion. The method of communicating on an unlicensed frequency band according to claim 1, wherein in the data transmission process between the base station and the user equipment, the base station determines whether the unlicensed carrier generates contention congestion, including: When the user equipment sends the uplink data to the base station, the base station sends an uplink scheduling command to the user equipment by using the primary carrier, so that the user equipment is on the unlicensed carrier before sending the downlink data. Initiating an uplink LBT to compete for the unlicensed carrier resource, and measuring an uplink LBT number initiated before successfully competing for the unlicensed carrier resource to send the uplink data, and successfully competing to send the uplink data to the At least one of the time taken to initiate an uplink LBT before the unlicensed carrier resource; The base station acquires a measurement report reported by the user equipment, and when the measurement report indicates that at least one of the number of times and the time exceeds a threshold, determining that the unlicensed carrier generates contention congestion, when the measurement The report indicates that the number of times and the time does not exceed the threshold value The weight carrier does not generate competing congestion. The method of communicating on an unlicensed frequency band according to claim 1, wherein in the data transmission process between the base station and the user equipment, the base station determines whether the unlicensed carrier generates contention congestion, including: When the user equipment sends uplink data to the base station, the base station initiates a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource, Sending, by the unlicensed carrier, an uplink scheduling command to the user equipment, so that the user equipment initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before transmitting the downlink data, and measures The number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources for transmitting the uplink data and the time taken to initiate an uplink LBT before successfully competing for the unlicensed carrier resources for transmitting the uplink data at least one; The base station counts the number of downlink LBTs initiated before the non-authorized carrier resources are successfully contending to send the uplink scheduling command, and initiates a downlink LBT before successfully competing for the unlicensed carrier resources to send the uplink scheduling command. At least one of the time spent; Obtaining, by the base station, at least one of the number of uplink LBTs reported by the user equipment and the time taken by the uplink LBT, when the sum of the number of uplink LBTs and the number of downlink LBTs and the uplink LBT are spent When at least one of the sum of time and the time spent by the downlink LBT exceeds a threshold, it is determined that the unlicensed carrier generates contention congestion, when the sum of the uplink LBT times and the downlink LBT times When the sum of the time taken by the uplink LBT and the time taken by the downlink LBT does not exceed the threshold, it is determined that the unlicensed carrier does not generate contention congestion. The method for communicating on an unlicensed frequency band according to claim 3, further comprising: Before the base station sends an uplink scheduling command to the user equipment, or the base station and the user equipment establish a data service procedure for carrying an unlicensed carrier, the base station initiates measurement control to the user equipment, requesting the The user equipment measures, in order to transmit the uplink data, the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources, and the cost of initiating the uplink LBT before successfully competing for the unlicensed carrier resources to send the uplink data. At least one of the times, and corresponding reporting events are configured according to the measurement results. The method for communicating on an unlicensed frequency band according to claim 4, further comprising: Before the base station sends an uplink scheduling command to the user equipment, or the base station and the user equipment establish a data service procedure for carrying an unlicensed carrier, the base station initiates measurement control to the user equipment, requesting the User equipment measures to successfully compete for the non-granting by transmitting the uplink data At least one of an uplink LBT number initiated before the right carrier resource and a time taken to initiate an uplink LBT before successfully competing for the unlicensed carrier resource for transmitting the uplink data, and configuring the measurement result as a periodic measurement report . A device for communicating on an unlicensed frequency band is applied to a base station, including a service establishment module, a congestion decision module, and a parameter adjustment module, where: The service establishing module is configured to establish, with the user equipment, a data service carried by an unlicensed carrier; The congestion determination module is configured to determine whether the unlicensed carrier generates contention congestion during data transmission between the base station and the user equipment; The parameter adjustment module is configured to increase a maximum number of retransmissions of the hybrid automatic repeat request HARQ when the unlicensed carrier generates contention congestion or increase the RLC weight when the radio link control layer protocol RLC is configured in the acknowledge mode The timing length of the polling timer. The apparatus for communicating on an unlicensed frequency band according to claim 7, wherein said congestion decision module comprises: The sending unit is configured to: when the downlink data is sent to the user equipment, listen to the LBT before the downlink session is initiated on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource Transmitting, by the unlicensed carrier, the downlink data to the user equipment; a statistic unit, configured to count the number of downlink LBTs initiated before successfully competing for the unlicensed carrier resources to send the downlink data, and initiate a downlink LBT before successfully competing for the unlicensed carrier resources to send the downlink data At least one of the time spent; a determining unit, configured to: when the at least one of the number of times and the time exceeds a threshold, determine that the unlicensed carrier generates contention congestion, and when the number of times and the time do not exceed a threshold, determine The unlicensed carrier does not generate competing congestion. The apparatus for communicating on an unlicensed frequency band according to claim 7, wherein said congestion decision module comprises: a sending unit, configured to: when the user equipment sends uplink data to the base station, send an uplink scheduling command to the user equipment by using a primary carrier, so that the user equipment is not authorized before sending the downlink data. Initiating an uplink LBT on the carrier to compete for the unlicensed carrier resource, and measuring the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resource to transmit the uplink data, and successfully competing for transmitting the uplink data. At least one of the time taken to initiate the uplink LBT before the unlicensed carrier resource; a determining unit, configured to obtain a measurement report reported by the user equipment, and when the measurement report indicates that at least one of the number of times and the time exceeds a threshold, determining that the unlicensed carrier generates contention congestion The measurement report indicates that the unlicensed carrier does not generate competing congestion when the number of times and the time does not exceed the threshold. The apparatus for communicating on an unlicensed frequency band according to claim 7, wherein said congestion decision module comprises: a sending unit, configured to: when the user equipment sends uplink data to the base station, initiate a downlink LBT on the unlicensed carrier to compete for the unlicensed carrier resource, and when the downlink LBT successfully contends to the unlicensed carrier resource Sending, by the unlicensed carrier, an uplink scheduling command to the user equipment, so that the user equipment initiates an uplink LBT on the unlicensed carrier to compete for the unlicensed carrier resource before sending the downlink data, And measuring, according to the number of uplink LBTs initiated before the non-authorized carrier resources are successfully contending to send the uplink data, and the time taken to initiate the uplink LBT before successfully competing for the unlicensed carrier resources to send the uplink data. At least one of them; a statistic unit, configured to count the number of downlink LBTs initiated before the user successfully contends to the unlicensed carrier resource by sending the uplink scheduling command, and initiates a successful competition to the unlicensed carrier resource before sending the uplink scheduling command. At least one of the time spent on the downlink LBT; a determining unit, configured to acquire the number of times of the uplink LBT reported by the user equipment and the time taken by the uplink LBT, when the sum of the number of uplink LBTs and the number of downlink LBTs and the time of the uplink LBT And determining, by the at least one of the sum of the times taken by the downlink LBT, that the unlicensed carrier generates contention congestion, when the sum of the uplink LBT times and the downlink LBT times and the uplink LBT cost When the sum of the time and the time taken by the downlink LBT does not exceed the threshold, it is determined that the unlicensed carrier does not generate competing congestion. The apparatus for communicating on an unlicensed frequency band according to claim 9, further comprising a measurement control module, the measurement control module being configured to: Before the sending unit sends an uplink scheduling command to the user equipment, or the service establishing module and the user equipment establish a data service procedure for carrying the unlicensed carrier, initiate measurement control to the user equipment, requesting the The user equipment measures, in order to transmit the uplink data, the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources, and the cost of initiating the uplink LBT before successfully competing for the unlicensed carrier resources to send the uplink data. At least one of the times, and corresponding reporting events are configured according to the measurement results. Apparatus for communicating over an unlicensed frequency band according to claim 10, further comprising measurement control Module, the measurement control module is set to: Before the sending unit sends an uplink scheduling command to the user equipment, or the service establishing module and the user equipment establish a data service procedure for carrying the unlicensed carrier, initiate measurement control to the user equipment, requesting the The user equipment measures, in order to transmit the uplink data, the number of uplink LBTs initiated before successfully competing for the unlicensed carrier resources, and the cost of initiating the uplink LBT before successfully competing for the unlicensed carrier resources to send the uplink data. At least one of the time and configure the measurement as a periodic measurement report. A non-transitory computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-6.

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