CN104812032A

CN104812032A - Method and device for using DRX in non-authorized frequency band

Info

Publication number: CN104812032A
Application number: CN201510170648.8A
Authority: CN
Inventors: 李明菊; 朱亚军; 雷艺学; 张云飞
Original assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Current assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2015-07-29
Anticipated expiration: 2035-04-10
Also published as: CN104812032B; WO2016161708A1

Abstract

The embodiment of the invention discloses a method for using DRX in a non-authorized frequency band. The method comprises the steps of configuring non-continuous received DRX parameters for UE to obtain the DRX activating time and the DRX sleeping time of the UE; sending the DRX parameters to the UE; setting information of CCA detection time of an idle channel of the UE at the non-authorized frequency band; sending the first indication information to the UE to indicate the UE to wake up at the CCA time in the non-authorized frequency band so as to monitor the channel of the non-authorized frequency band; sending the data according to the CCA time of the UE at the non-authorized frequency band, and the DRX activating time and the DRX sleep time of the UE. According to the technical scheme, the method has the advantages that the UE can effectively monitor the channel of the non-authorized frequency band while the power consumption of the UE at the non-authorized frequency band is reduced; the LTE device and the WiFi device can fairly share the resources in the non-authorized frequency band.

Description

Method and device for applying DRX (discontinuous reception) in unauthorized frequency band

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for applying DRX in an unlicensed frequency band.

Background

With the rapid increase of mobile communication traffic, the authorized frequency band in the 3GPP network is less and less satisfied with the increasing traffic, and in order to further improve the frequency resource benefit efficiency on the limited frequency resource, the 3GPP organization turns to the study of the Access technology of the unlicensed frequency band, and introduces the LTE Assisted Access (LAA) technology, so as to assist the use of the unlicensed frequency band by means of the Long Term Evolution (LTE) Access technology on the authorized frequency band. Compared with WiFi working in an unlicensed frequency band, the LTE access technology can provide higher frequency efficiency, more comprehensive position coverage and better service quality and mobility support.

The WiFi technology on the unlicensed frequency band is to eliminate interference among different WiFi devices through carrier sense Multiple Access/Collision Detection (CSMA/CA), before data is sent, the WiFi devices monitor whether a channel is idle or not, and perform backoff if the channel is idle, a random number M is generated, and M is subtracted by 1 when the channel is idle, otherwise M is unchanged. The back-off time ends when M becomes 0 and the user can start sending signaling or data. However, there is no carrier sense mechanism in the LTE technology, which would cause great interference to the WiFi device if the LTE technology is used in an unlicensed frequency band.

In order to make LTE devices and WiFi devices more fairly share resources in unlicensed bands, 3GPP introduces a Listen Before Talk (LBT) mechanism in LAA for LTE devices to monitor and detect idle channels in unlicensed bands.

In theoretical research, the inventor of the present invention finds that an LBT mechanism needs to monitor and detect a Channel of an unlicensed frequency band at a Clear Channel association (CAA) time, which greatly increases power consumption of a terminal, thereby increasing cost and overhead of a User Equipment (UE) used on the unlicensed frequency band. Discontinuous Reception (DRX) technology is adopted in an unlicensed frequency band to effectively reduce the power consumption of the UE, but an effective method for combining an LBT mechanism and a DRX mechanism does not exist at present.

Disclosure of Invention

The embodiment of the invention discloses a method for applying DRX (discontinuous reception) in an unauthorized frequency band, which can combine an LBT (local binary transmission) mechanism with a DRX mechanism of LTE (Long term evolution) in an LAA (resource access architecture) technology of the unauthorized frequency band by using the technical scheme provided by the embodiment of the invention, so that UE (user equipment) can wake up and monitor a channel of the unauthorized frequency band in CCA (CCA) time, and meanwhile, the power consumption of the UE on the unauthorized frequency band can be effectively reduced.

A first aspect of an embodiment of the present invention provides a method for applying discontinuous reception DRX in an unlicensed frequency band, where the method is applicable to a base station device operating in the unlicensed frequency band, and includes:

configuring Discontinuous Reception (DRX) parameters for User Equipment (UE) to obtain DRX activation time and DRX sleep time of the UE; sending the DRX parameter to the UE;

setting information of CCA time for detecting an unlicensed frequency band idle channel of the UE; sending first indication information to the UE, wherein the first indication information is used for indicating that the UE wakes up at the time of the CCA in the unlicensed frequency band and monitors a channel of the unlicensed frequency band;

and sending data according to the CCA time of the unlicensed frequency band of the UE, the DRX activation time and the DRX sleep time of the UE.

With reference to the first aspect, in a first possible implementation manner, the first indication information is further used to carry information of the UE unlicensed band CCA time, so as to inform the UE of the UE unlicensed band CCA time.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the instructing the UE to wake up at the CCA time of the unlicensed band includes:

the first indication information is used for indicating that the UE wakes up in a time when the CCA time of the unlicensed frequency band and the DRX sleep time overlap.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the first indication information carries information of a CCA time of the UE in an unlicensed frequency band, where,

if the LBT mechanism on the unlicensed frequency band is a frame structure-based LBT mechanism, the information of the CCA time of the unlicensed frequency band includes: a period CCA time length, a period CCA time offset, a channel occupation time length and an idle time length;

if the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the information of the CCA time of the unlicensed frequency band includes: the method comprises the steps of obtaining an initial CCA time length, a channel occupation time length and an extended CCA time inner competition window length q, wherein q is an integer which is greater than or equal to 4 and less than or equal to 32.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the sending the first indication information to the UE specifically is: and sending first indication information to the UE in an authorized frequency band through Radio Resource Control (RRC) signaling.

With reference to the third possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, if the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, after the sending the first indication information to the UE, the method further includes:

when receiving an uplink Scheduling Request (SR) signaling sent by the UE, determining the starting time of the initial CCA time of the UE, and sending second indication information to the UE, wherein the second indication information is used for indicating the starting time of the initial CCA time of the UE; or,

receiving third indication information sent by the UE, wherein the third indication information is used for determining an initial CCA time starting moment of the UE;

the second indication information is a Media Access Control (MAC) control unit (CE) or a physical layer downlink control channel (PDCCH) signaling sent on an authorized frequency band or an unauthorized frequency band.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the determining an initial CCA time start time of the UE further includes:

determining a starting time of an extended CCA time of the UE;

and when receiving the uplink data of the UE, determining the end time of the extended CCA time of the UE.

With reference to the first aspect, in a seventh possible implementation manner of the first aspect, the first indication information is used to indicate that the UE wakes up at a CCA time in an unlicensed frequency band, and monitors a channel in the unlicensed frequency band, and the method includes:

if the same DRX mechanism is adopted by the unlicensed frequency band and the licensed frequency band, the first indication information is used for indicating that the UE wakes up on the licensed frequency band and the unlicensed frequency band simultaneously within the time of the CCA of the unlicensed frequency band, and monitors a channel of the unlicensed frequency band and a channel of the licensed frequency band;

if different DRX mechanisms are adopted by the unlicensed frequency band and the licensed frequency band, the first indication information is used for indicating that the CCA time of the UE on the unlicensed frequency band wakes up and monitoring a channel of the unlicensed frequency band.

With reference to the first aspect, in an eighth possible implementation manner of the first aspect, the transmitting data according to the CCA time of the unlicensed band of the UE, the DRX active time of the UE, and the DRX sleep time includes:

if the CCA time of the UE is located in the DRX sleep time interval of the UE, stopping transmitting data or signaling to other UEs except the UE in the CCA time of the UE on the unlicensed frequency band;

if the CCA time of the UE is located in the DRX activation time interval of the UE, stopping transmitting data or signaling to the UE and other UEs except the UE in the CCA time of the UE on the unlicensed frequency band.

The CCA time includes a periodic CCA time, an initial CCA time, or an extended CCA time.

A second aspect of the embodiments of the present invention provides a method for applying DRX in an unlicensed frequency band, where the method is applied to a UE operating in the unlicensed frequency band, and includes:

receiving DRX parameters sent by a base station to obtain DRX activation time and DRX sleep time of the UE;

receiving first indication information sent by a base station, and obtaining information of CCA time of an unlicensed frequency band from the first indication information;

and according to the indication of the first indication information, waking up at the CCA time of the unlicensed frequency band, and monitoring a channel of the unlicensed frequency band.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the waking up at the unlicensed CCA time and monitoring a channel of an unlicensed frequency band includes:

and waking up in the time overlapping the CCA time of the unauthorized frequency band and the DRX sleep time, and monitoring the channel of the unauthorized frequency band.

With reference to the second aspect, in a second possible implementation manner of the second aspect,

if the LBT mechanism on the unlicensed frequency band is a frame structure-based LBT mechanism, the information of the CCA time of the unlicensed frequency band includes: a periodic CCA time offset, a periodic CCA time length, a channel occupancy time length, and an idle time length;

With reference to the second aspect, in a third possible implementation manner of the second aspect, the receiving the first indication information sent by the base station specifically includes: and receiving the first indication information by receiving RRC signaling sent by the base station on the authorized frequency band.

With reference to the second possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, if the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, after obtaining information of a CCA time of the unlicensed frequency band from the first indication information, the method further includes:

after sending the uplink SR signaling to the base station, receiving second indication information sent by the base station to determine the starting time of the initial CCA time; or,

determining a starting time of the initial CCA time, and sending third indication information to the base station, wherein the third indication information is used for indicating the starting time of the initial CCA time of the base station;

the second indication information is MAC CE or PDCCH signaling sent by the base station on the authorized frequency band or the unauthorized frequency band.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, after determining the starting time of the initial CCA time, the method further includes:

determining a starting time of the extended CCA time;

and when the extended CCA time is finished, transmitting uplink data to the base station to indicate that the extended CCA time of the base station is finished.

With reference to the second aspect, in a sixth possible implementation manner of the second aspect, the waking up at the unlicensed CCA time and monitoring a channel of an unlicensed frequency band includes:

if the same DRX mechanism is adopted for the unlicensed frequency band and the licensed frequency band, the device wakes up on the licensed frequency band and the unlicensed frequency band simultaneously within the CCA time of the unlicensed frequency band, and monitors a channel of the unlicensed frequency band and a channel of the licensed frequency band;

if the unlicensed frequency band and the licensed frequency band adopt different DRX mechanisms, the CCA time on the unlicensed frequency band wakes up to monitor the channel of the unlicensed frequency band.

A third aspect of the embodiments of the present invention provides a base station device for applying DRX in an unlicensed frequency band, including:

the processing unit is used for configuring Discontinuous Reception (DRX) parameters for User Equipment (UE) so as to obtain DRX activation time and DRX sleep time of the UE;

a sending unit, configured to send the DRX parameter to the UE;

the processing unit is further configured to set information of an unlicensed frequency band CCA time of the UE;

the sending unit is further configured to send first indication information to the UE, where the first indication information is used to indicate that the UE wakes up at the CCA time of the unlicensed frequency band, and monitors a channel of the unlicensed frequency band;

the sending unit is further configured to send data according to the CCA time of the unlicensed band of the UE, the DRX active time of the UE, and the DRX sleep time.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the first indication information is further configured to carry information of a CCA time of the UE in an unlicensed frequency band, so as to inform the CCA time of the UE in the unlicensed frequency band.

With reference to the third aspect and the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the instructing, by the first indication information, the UE to wake up at the CCA time of the unlicensed band includes:

With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the first indication information carries information of a CCA time of the UE in an unlicensed frequency band, where,

With reference to the third aspect and the first possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the sending unit is further configured to send first indication information to the UE, where the sending unit includes:

the sending unit is further configured to send first indication information to the UE on the licensed frequency band through RRC signaling.

With reference to the third possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, if the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the configuration unit is further configured to determine a starting time of an initial CCA time of the UE when receiving an uplink scheduling request SR signaling sent by the UE,

the sending unit is further configured to send second indication information to the UE, where the second indication information is used to indicate a starting time of an initial CCA time of the UE; or,

the device further includes a receiving unit, configured to receive third indication information sent by the UE, where the third indication information is used to determine a starting time of an initial CCA time;

the second indication information is MAC CE or PDCCH signaling sent on the authorized frequency band or the unauthorized frequency band.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the processing unit is further configured to:

determining a starting time of an extended CCA time of the UE;

With reference to the third aspect, in a seventh possible implementation manner of the third aspect, the first indication information is used to indicate that the UE wakes up at a CCA time in an unlicensed frequency band, and monitors a channel in the unlicensed frequency band, and the method includes:

With reference to the third aspect, in an eighth possible implementation manner of the third aspect, the performing, by the sending unit, data transmission according to the unlicensed band CCA time of the UE, the DRX active time of the UE, and the DRX sleep time includes:

if the CCA time of the UE is located in the DRX sleep time interval of the UE, the sending unit stops sending data or signaling to other UEs except the UE within the CCA time of the UE on the unlicensed frequency band;

if the CCA time of the unlicensed frequency band of the UE is within the DRX activation time interval of the unlicensed frequency band of the UE, the sending unit stops sending data or signaling to the UE and other UEs except the UE within the CCA time of the UE on the unlicensed frequency band.

A fourth aspect of the present invention provides a terminal device that applies DRX in an unlicensed frequency band, including:

a receiving unit, configured to receive a DRX parameter sent by a base station to obtain DRX active time and DRX sleep time of the UE, and further configured to receive first indication information sent by the base station, and obtain information of CCA time in an unlicensed band from the first indication information;

and the processing unit is used for enabling the receiver to wake up at the CCA time of the unlicensed frequency band according to the indication of the first indication information and monitoring the channel of the unlicensed frequency band.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the causing, by the processing unit, a receiver to wake up at the unlicensed CCA time and listen to a channel of an unlicensed frequency band includes:

and the processing unit enables the receiver to wake up in the time overlapping the CCA time of the unlicensed frequency band and the DRX sleep time, and monitors the channel of the unlicensed frequency band.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, if the LBT mechanism on the unlicensed frequency band is an LBT mechanism based on a frame structure, the information of the CCA time of the unlicensed frequency band includes: a periodic CCA time offset, a periodic CCA time length, a channel occupancy time length, and an idle time length;

if the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the information of the CCA time of the unlicensed frequency band includes: an initial CCA time length, a channel occupancy time length, and an extended CCA time contention window length q, where q is an integer greater than or equal to 4 and less than or equal to 32.

With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, the receiving unit is further configured to receive first indication information sent by the base station, and the receiving unit includes:

the receiving unit is further configured to receive first indication information sent by the base station by receiving an RRC signaling sent by the base station on an authorized frequency band.

With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, if the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the receiving unit is further configured to receive second indication information sent by the base station after sending the uplink SR signaling to the base station, so as to determine a starting time of the initial CCA time; or,

the processing unit is further configured to determine a starting time of the initial CCA time, and the device further includes a sending unit configured to send third indication information to the base station, where the third indication information is used to indicate the starting time of the initial CCA time of the base station;

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect,

the processing unit is further configured to determine a starting time of the extended CCA time;

the sending unit is further configured to send uplink data to the base station when the extended CCA time is ended, so as to indicate that the extended CCA time of the base station is ended.

With reference to the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the processing unit is configured to wake up at the unlicensed CCA time and monitor a channel of an unlicensed frequency band, and includes:

if the same DRX mechanism is adopted by the unauthorized frequency band and the authorized frequency band, the processing unit is used for enabling the receiver to simultaneously wake up on the authorized frequency band and the unauthorized frequency band within the CCA time of the unauthorized frequency band and monitoring a channel of the unauthorized frequency band and a channel of the authorized frequency band;

if different DRX mechanisms are adopted by the unlicensed frequency band and the licensed frequency band, the processing unit is used for enabling the CCA time of the receiver on the unlicensed frequency band to wake up and monitor a channel of the unlicensed frequency band.

It can be seen that, in the technical solution of the embodiment of the present invention, in the LAA technology of the unlicensed band, the LBT mechanism is combined with the DRX mechanism of the LTE, and the base station controls the UE to wake up to monitor the unlicensed band, that is, the base station sends the first indication information to the UE to indicate the UE to wake up in the CCA time of the unlicensed band, even during the DRX sleep time. The UE can effectively monitor the channel of the unlicensed frequency band, the power consumption of the UE on the unlicensed frequency band is reduced, and the LTE device and the WiFi device can share the unlicensed frequency band resources more fairly while the power consumption of the UE on the unlicensed frequency band is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of an LBT mechanism based on a frame structure according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a load-based LBT mechanism provided by an embodiment of the present invention;

fig. 3 is a flowchart illustrating a method for applying DRX in an unlicensed frequency band according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating another method for applying DRX in an unlicensed frequency band according to a second embodiment of the present invention;

fig. 5 is a flowchart illustrating another method for applying DRX in an unlicensed frequency band according to a third embodiment of the present invention;

fig. 6 is a flowchart illustrating another method for applying DRX in an unlicensed frequency band according to a fourth embodiment of the present invention;

fig. 7 is a flowchart illustrating another method for applying DRX in an unlicensed frequency band according to a fifth embodiment of the present invention;

fig. 8 is a flowchart illustrating another method for applying DRX in an unlicensed frequency band according to a sixth embodiment of the present invention;

fig. 9 is a schematic diagram of a base station device according to a seventh embodiment of the present invention;

fig. 10 is a schematic diagram of a terminal device according to an eighth embodiment of the present invention;

fig. 11 is a schematic diagram of another base station device according to the ninth embodiment of the present invention;

fig. 12 is a schematic diagram of another terminal device provided in the tenth embodiment of the present invention.

Detailed Description

In order to make LTE devices and WiFi devices more fairly share resources in unlicensed bands, 3GPP introduces a Listen Before Talk (LBT) mechanism in LAA for LTE devices to monitor and detect idle channels in unlicensed bands. Currently, LBT mechanisms are mainly classified into frame structure-based LBT mechanisms and load-based LBT mechanisms.

Referring to fig. 1, as shown in fig. 1, one idle channel detection period includes a period CCA time, a channel occupation time, and an idle time, and the period CCA time is located at the beginning of each idle channel detection period. Before sending data, the LTE equipment monitors whether a channel is idle in a period CCA time, and if the channel is idle, the LTE equipment sends the data in a subsequent channel occupying time, and releases the channel in the idle time of the detection period; data cannot be transmitted during the subsequent channel occupancy time if the channel is detected as busy during the periodic CCA time. The periodic CCA time occupies one or more symbols of the beginning of a subframe, as shown in fig. 1, the CCA begins at the first symbol of subframe 0. The LBT mechanism based on the frame structure has the advantages of simple implementation mode and large data transmission delay.

Referring to fig. 2, in the load-based LBT mechanism, idle channel detection of an LTE device has no fixed period, before transmitting data, the LTE device immediately monitors whether a channel is idle at the next available initial CCA time, and transmits data within the subsequent channel occupation time if the channel is idle, otherwise does not transmit data; if the monitored channel is busy in the initial CCA time or the data is not transmitted in the channel occupation time, expanding the CCA time, detecting whether the channel is idle in each expanded CCA time interval, wherein the expanded CCA time interval is the same as the initial CCA time length, if the channel is detected to be idle, recording that the channel is idle once, and transmitting the data in the subsequent channel occupation time when the channel is idle for N times, or not transmitting the data. Wherein N is an integer from 1 to q, wherein q is a contention window length of the extended CCA time, and is greater than or equal to 4 and less than or equal to 32. The load-based LBT base station has the advantages of better performance and smaller data transmission delay when the load is heavier.

The embodiment of the invention discloses a method for applying DRX (discontinuous reception) in an unauthorized frequency band, which can combine an LBT (local binary transmission) mechanism with a DRX mechanism of LTE (Long term evolution) in an LAA (local area access) technology of the unauthorized frequency band by using the technical scheme provided by the embodiment of the invention, and control the time for the UE to wake up and monitor the unauthorized frequency band according to the DRX activation time, DRX sleep time and unauthorized frequency band CCA (CCA) time of the UE, so that a terminal can effectively monitor a channel of the unauthorized frequency band, the power consumption of the UE on the unauthorized frequency band can be effectively reduced, the LTE equipment and WiFi equipment can use the channel more fairly in the unauthorized frequency band, and the cost and expense for the UE to use the unauthorized frequency band can be reduced.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For a better understanding of the embodiments of the present invention, each of the embodiments is described below.

The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Referring to fig. 3, fig. 3 is a flowchart illustrating a method for applying DRX in an unlicensed frequency band according to an embodiment of the present invention, where as shown in fig. 3, the method according to the embodiment of the present invention may include:

s101, configuring DRX parameters for UE to obtain DRX activation time and DRX sleep time of the UE; and sending the DRX parameters to the UE.

In the LTE technology, the UE configured with the DRX function periodically turns on a receiver in a connected state, and monitors a Physical Downlink Control Channel (PDCCH), without continuously monitoring a Downlink Channel by the UE, so that power consumption of the terminal device can be reduced. The base station equipment controls the DRX activation time of the UE by configuring a DRX related cycle and a timer, and the UE turns on a receiver to receive downlink signals within the DRX activation time. The timers include an On-Duration Timer, a non-active Timer, and a Retransmission Timer, and each Hybrid Automatic Repeat (HARQ) process has independent Drx timers. The DRX related Cycle comprises a DRX long Cycle (longDRX Cycle) and a DRX short Cycle (shortDRX Cycle), the UE uses the DRX short Cycle during the starting period of the DRX short Cycle timer, and when the UE does not monitor the PDCCH for sending uplink and downlink authorization during the starting period of the DRX short Cycle timer, the UE changes from the short Cycle to use the DRX long Cycle until the UE resumes using the DRX short Cycle after entering the DRX activation time.

The UE has an On-Duration time for continuously monitoring the PDCCH in each DRX short period and each DRX long period, and the time length is determined by an On-Duration Timer. The mechanism of the UE when using the DRX short cycle and the DRX long cycle is the same, and the power consumption of the UE is lower during the DRX long cycle than during the DRX short cycle.

The DRX activation time of the UE comprises:

an On-Duration Timer running time, a Drx-Inactivity Timer running time, and a Drx-Retransmission Timer running time of the UE;

the UE waits for an uplink grant period after sending a Scheduling Request (SR);

and the UE has uplink data which fails to be sent and has uplink data which is cached.

For those skilled in the art, it can be understood that the base station may determine the DRX active time and the DRX sleep time of the UE through the DRX configuration parameters of the UE, including parameters such as an On-Duration Timer, a DRX-Inactivity Timer, and a DRX-retransmission Timer, a LongDRX Cycle length, a ShortDRX Cycle length, and an On-Duration time start subframe offset, and the uplink and downlink data transmission conditions of the UE. The base station can configure different DRX parameters for the UE, and sends the DRX parameters to the UE through downlink signaling so as to control the UE to wake up at different activation times to monitor a downlink channel. By the method, the base station can maintain the DRX state information of the UE through the DRX parameters and the uplink and downlink data transmission condition of the UE so as to conveniently carry out uplink and downlink scheduling on the UE.

S102, setting information of the CCA time of the unlicensed frequency band of the UE; and sending first indication information to the UE, wherein the first indication information is used for indicating the UE to wake up at the CCA time of the unlicensed frequency band and monitor a channel of the unlicensed frequency band.

The base station firstly configures the CCA time of the unlicensed frequency band of the UE, and different CCA times can be set for different UEs. The base station may support configuring the CCA time under the frame structure-based LBT mechanism and under the load-based LBT mechanism.

For example, under the LBT mechanism based on the frame structure, the unlicensed band CCA time may be determined by a period CCA time length, a period CCA time offset, a channel occupation time length, and an idle time length. The starting time of the periodic CCA time may be determined by the following formula, and the periodic CCA time is started when the frame number and the subframe number satisfy the formula:

[(FrameNum×10)+SFN]％N_{CCA_Cycle}＝N_{CCA_Offset}

wherein N is_{CCA_Cycle}The number of subframes occupied by the sum of the period CCA length, the channel occupying time length and the idle time length; n is a radical of_{CCA_Offset}A time offset is initiated for the periodic CCA.

The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: a period CCA time length, a period CCA time offset, a channel occupancy time length, and an idle time length. And after the base station configuration is finished, the information of the CCA time is sent to the UE, and the first indication information is used for carrying the information of the CCA time of the UE in the unlicensed frequency band so as to inform the CCA time of the UE in the unlicensed frequency band. And the UE acquires the information of the CCA time of the unlicensed frequency band from the first indication information, so that the starting time of the CCA time of each period can be determined by the formula.

For another example, under the load-based LBT mechanism, the unlicensed band CCA time, including the initial CCA time and the extended CCA time, may be determined through an initial CCA time length, an initial CCA time start time, a channel occupation time length, and an extended CCA time contention window length q, where q is an integer greater than or equal to 4 and less than or equal to 32. And the UE randomly selects an integer N from 1 to q, and in the next extended CCA detection time, if the channel is detected to be idle, the N is subtracted from 1, otherwise, the N is unchanged, and when the N is subtracted from 0, the extended CCA time is ended, the channel occupation time is entered, and data transmission is started. The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: the method comprises the steps of obtaining an initial CCA time length and a channel occupation time competition window length q; and after the base station configuration is finished, the CCA time information is sent to the UE, the first indication information is used for carrying the CCA time information of the UE in the unlicensed frequency band, and the UE acquires the CCA time information of the unlicensed frequency band from the first indication information so as to determine the CCA time. The starting time of the initial CCA time is determined after the UE generates uplink cache data, and the starting time of the expanded CCA time is after the initial CCA time or after the channel occupation time.

The first indication information is used for indicating the UE to wake up at the CCA time of the unlicensed frequency band and monitor a channel of the unlicensed frequency band. When a base station configures a DRX function for UE on an unauthorized frequency band, the UE can acquire DRX sleep time of the UE according to DRX parameters and uplink and downlink data transmission conditions of the UE, and the UE does not monitor a downlink channel during the DRX sleep time. For example, according to the configuration of a base station on the CCA time of the unlicensed band of the UE, the CCA time may be in the DRX sleep time of the UE, and when the CCA time is in the DRX sleep time of the UE, the UE turns on a receiver so as to monitor whether a channel of the unlicensed band is idle; when the CCA time is in the DRX activation time of the UE, the UE is required to inform a physical layer of monitoring a channel of an unlicensed frequency band in the CCA time because the UE turns on a receiver in the DRX activation time.

S103, data transmission is carried out according to the CCA time of the unlicensed frequency band of the UE, the DRX activation time and the DRX sleep time of the UE.

In order to ensure the accuracy of detecting a free channel on an unlicensed frequency band by a UE, a base station firstly determines the CCA time of the unlicensed frequency band of the UE, and the DRX activation time and the sleep time of the UE.

The base station can acquire the DRX activation time and the DRX sleep time of the UE according to the DRX parameters configured for the UE and acquire the CCA time of the unauthorized frequency band of the UE according to the CCA time information of the unauthorized frequency band configured for the UE.

If the LBT mechanism on the unlicensed frequency band is the frame structure-based LBT mechanism, the base station may obtain the periodic CCA time according to the configured information of the CCA time of the unlicensed frequency band. If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the starting time of the initial CCA time is determined after the UE generates uplink buffer data, the base station cannot know the starting time of the initial CCA time, the extended CCA time length is determined by an integer N randomly selected by the UE between 1 and q, and the base station cannot know the extended CCA time length. The UE can inform the base station that the unauthorized channel needs to be monitored through the uplink scheduling request SR, and the base station sends an instruction to the UE to indicate the starting moment of the initial CCA time; or after the UE determines the starting time of the initial CCA time, the UE informs the base station through uplink indication information so that the base station can acquire the starting time of the initial CCA time. And the starting time of the extended CCA time is after the initial CCA time or after the channel occupation time. The base station may acquire that the extended CCA time of the UE is finished through uplink data sent by the UE when the extended CCA time is finished. The base station can use the initial CCA time starting moment, the extended CCA time starting moment and the extended CCA time ending moment to combine the information into the non-authorized frequency band CCA time information configured by the UE, and obtain the non-authorized frequency band CCA time of the UE, including the initial CCA time and the extended CCA time.

It can be seen that the technical solution of the embodiment of the present invention effectively combines an LBT mechanism and a DRX mechanism in the LAA technology on the unlicensed frequency band, and the use of the DRX mechanism can effectively reduce the power consumption of the UE on the unlicensed frequency band, and at the same time, the base station indicates, through the first indication information, that the UE wakes up at the CCA time of the unlicensed frequency band to monitor the unlicensed channel, so that the UE can wake up to monitor the channel at the DRX sleep time, thereby enabling the LTE device and the WiFi device to share the channel resources of the unlicensed frequency band more fairly. The method and the device achieve the purposes of reducing the power consumption of the UE working on the unauthorized frequency band and simultaneously enabling the UE to effectively monitor the channel of the unauthorized frequency band.

Another embodiment of the present invention, embodiment two provides a method for applying DRX in an unlicensed frequency band, referring to fig. 4, where fig. 4 is a schematic flow chart of embodiment two of the present invention, and the method provided in embodiment two of the present invention includes:

s201, configuring Discontinuous Reception (DRX) parameters for User Equipment (UE) to obtain DRX activation time and DRX sleep time of the UE; and sending the DRX parameters to the UE.

The base station equipment controls the DRX activation time of the UE by configuring a DRX related cycle and a timer, and the UE turns on a receiver to receive downlink signals within the DRX activation time. The timers include an On-Duration Timer, a non-active Timer, and a Retransmission Timer, and each Hybrid Automatic Repeat (HARQ) process has independent Drx timers. The DRX related Cycle comprises a DRX long Cycle (longDRX Cycle) and a DRX short Cycle (shortDRXCcycle), the UE uses the DRX short Cycle during the starting period of the DRX short Cycle timer, and when the UE does not monitor the PDCCH for sending uplink and downlink authorization during the starting period of the DRX short Cycle timer, the UE changes from the short Cycle to use the DRX long Cycle until the UE resumes using the DRX short Cycle after entering the DRX activation time.

In each DRX short cycle and each DRX long cycle, the UE has a period of DRX activation time for continuously monitoring the PDCCH, and the time length is determined by a Timer On-Duration Timer; meanwhile, when the UE receives the HARQ initial transmission authorization, the UE also enters DRX activation time which is determined by a Timer DRX-Inactivity Timer; the DRX activation time is also entered when the UE sends the downlink HARQ Retransmission, and is determined by the Timer DRX-Retransmission Timer. The DRX activation time is also entered when the UE performs uplink data transmission and retransmission.

The UE can adopt the same DRX mechanism in the authorized frequency band and the unauthorized frequency band, and can also adopt different DRX mechanisms. When the same DRX mechanism is adopted in the authorized frequency band and the unauthorized frequency band, the base station configures a set of DRX parameters for the UE, and can simultaneously control the DRX activation state and the DRX sleep state of the UE on the authorized frequency band and the unauthorized frequency band; for example, if downlink HARQ Retransmission occurs in the licensed band, the UE starts a Timer Drx-Retransmission Timer, and during the Timer running, the UE is in an active state in both the licensed band and the unlicensed band.

When different DRX mechanisms are used in an authorized frequency band and an unauthorized frequency band, a base station can respectively control a DRX activation state and a DRX sleep state of the UE on the authorized frequency band and the unauthorized frequency band for two sets of DRX parameters of the UE; for example, the UE opens the receiver in the licensed band and closes the receiver in the unlicensed band at the On-Duration time of the licensed band, and the UE opens the receiver in the unlicensed band and closes the receiver in the licensed band at the On-Duration time of the unlicensed band.

And the base station sends the DRX parameters to the UE through downlink signaling so as to control the UE to wake up at different activation times to monitor a downlink channel. The base station can also maintain the DRX state information of the UE through the DRX parameters and the uplink and downlink data transmission conditions of the UE so as to conveniently carry out uplink and downlink scheduling on the UE.

S202, setting information of the CCA time of the UE in the period of the unlicensed frequency band; and sending first indication information to the UE, wherein the first indication information is used for indicating the UE to wake up at the periodic CCA time and monitor a channel of an unlicensed frequency band.

The base station firstly configures the periodic CCA time of the UE, and different periodic CCA times can be set for different UEs.

Under the LBT mechanism based on the frame structure, the unlicensed band CCA time can be determined by the period CCA time length, the period CCA time offset, the channel occupation time length, and the idle time length. The starting time of the periodic CCA time may be determined by the following formula, and the periodic CCA time is started when the frame number and the subframe number satisfy the formula:

[(FrameNum×10)+SFN]％N_{CCA_Cycle}＝N_{CCA_Offset}

wherein N is_{CCA_Cycle}The number of subframes occupied by the sum of the period CCA length, the channel occupation time length and the idle time length, namely the period of the period CCA time; n is a radical of_{CCA_Offset}A time offset is initiated for the periodic CCA.

The first indication information is RRC signaling sent by the base station on the authorized frequency band.

The first indication information is used for indicating the UE to wake up at a periodic CCA time and monitor a channel of an unlicensed frequency band. Specifically, when the periodic CCA time is in the DRX sleep time of the UE, the UE turns on a receiver so as to monitor whether a channel of an unlicensed frequency band is idle; when the periodic CCA time is in the DRX active time of the UE, the UE only needs to inform the physical layer to monitor the channel of the unlicensed frequency band in the CCA time because the UE has turned on the receiver in the DRX active time.

The base station may configure the periodic CCA time of the UE within the unlicensed band DRX activation time, for example, configure the periodic CCA time within an On-Duration time of the unlicensed band, for example, the periodic CCA time period is the same as the unlicensed band DRX short period, and use the same start period offset. Therefore, according to the first indication information, the UE does not need to start a receiver to monitor a channel of the unauthorized frequency band in the DRX sleep time of the unauthorized frequency band, and the power consumption of the UE can be reduced to the maximum extent.

The base station may also configure the periodic CCA time of the UE in the unlicensed band DRX sleep time, and according to the first indication information, the UE needs to turn on the receiver in the periodic CCA time of the DRX sleep time to monitor the channel, which may result in more power consumption.

If the same DRX mechanism is adopted by the unlicensed frequency band and the licensed frequency band, the UE synchronously enters an activated or sleeping state on the licensed frequency band and the unlicensed frequency band. The first indication information indicates that the UE wakes up on the authorized frequency band and the unauthorized frequency band simultaneously within the CCA time of the unauthorized frequency band, and monitors a channel of the unauthorized frequency band and a channel of the authorized frequency band.

If different DRX mechanisms are adopted by the unlicensed frequency band and the licensed frequency band, the UE does not need to enter an active or sleep state on the licensed frequency band and the unlicensed frequency band simultaneously. The first indication information indicates that the UE wakes up at the CCA time on the unlicensed frequency band to monitor the channel of the unlicensed frequency band, and does not wake up on the licensed frequency band to monitor the channel, so that the power can be better saved.

S203, data transmission is carried out according to the periodic CCA time of the UE, the DRX activation time of the UE and the DRX sleep time.

In order to ensure the accuracy of detecting a free channel on an unlicensed frequency band by a UE, a base station firstly determines the period CCA time of the UE, and the DRX activation time and the sleep time of the UE.

If the period CCA time of the UE is located in an unauthorized frequency band DRX sleep time interval of the UE, stopping transmitting data or signaling to other UEs except the UE in the period CCA time of the UE on an unauthorized frequency band;

and if the periodic CCA time of the UE is located in the DRX activation time interval of the UE, stopping transmitting data or signaling to the UE and other UEs except the UE in the periodic CCA time of the UE on the unlicensed frequency band.

It can be seen that the technical solution of the embodiment of the present invention effectively combines an LBT mechanism and a DRX mechanism in the LAA technology on the unlicensed frequency band, and the use of the DRX mechanism can effectively reduce the power consumption of the UE on the unlicensed frequency band, and at the same time, the base station instructs the UE to wake up at the periodic CCA time through the first indication information to monitor the unlicensed channel, so that the UE can wake up to monitor the channel at the DRX sleep time, thereby enabling the LTE device and the WiFi device to share the channel resources of the unlicensed frequency band more fairly. The method and the device achieve the purposes of reducing the power consumption of the UE working on the unauthorized frequency band and simultaneously enabling the UE to effectively monitor the channel of the unauthorized frequency band.

In another embodiment of the present invention, a third embodiment provides a method for applying DRX in an unlicensed frequency band, referring to fig. 5, and fig. 4 is a schematic flow chart of the third embodiment of the present invention, where the method provided in the third embodiment of the present invention includes:

s301, configuring Discontinuous Reception (DRX) parameters for User Equipment (UE) to obtain DRX activation time and DRX sleep time of the UE; and sending the DRX parameters to the UE.

S302, setting the CCA time information of the unlicensed frequency band of the UE; and sending first indication information to the UE, wherein the first indication information is used for indicating the UE to wake up at the initial CCA time and the extended CCA time and monitoring a channel of an unlicensed frequency band.

The base station firstly configures the CCA time of the unlicensed frequency band of the UE, and different CCA times can be set for different UEs.

Under a load-based LBT mechanism, an unlicensed band CCA time including an initial CCA time and an extended CCA time may be determined through an initial CCA time length, an initial CCA time starting time, a channel occupation time length, and an extended CCA time contention window length q, where q is an integer greater than or equal to 4 and less than or equal to 32. And the UE randomly selects an integer N from 1 to q, and in the next extended CCA detection time, if the channel is detected to be idle, the N is subtracted from 1, otherwise, the N is unchanged, and when the N is subtracted from 0, the extended CCA time is ended, the channel occupation time is entered, and data transmission is started. The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: the method comprises the steps of obtaining an initial CCA time length, a channel occupation time length and an extended CCA time contention window length q; and after the base station configuration is finished, the CCA time information is sent to the UE, the first indication information is used for carrying the CCA time information of the UE in the unlicensed frequency band, and the UE acquires the CCA time information of the unlicensed frequency band from the first indication information so as to determine the CCA time. The starting time of the initial CCA time is determined after the UE generates uplink cache data, and the starting time of the expanded CCA time is after the initial CCA time or after the channel occupation time. The first indication information is RRC signaling sent by the base station on the authorized frequency band.

The first indication information is used for indicating the UE to wake up at the CCA time of the unlicensed frequency band and monitor a channel of the unlicensed frequency band. For example, according to the configuration of the base station on the CCA time of the unlicensed band of the UE, the initial CCA time or the extended CCA time of the UE may be in the DRX sleep time of the UE, and when the initial CCA time or the extended CCA time is in the DRX sleep time of the UE, the UE turns on a receiver so as to monitor whether a channel of the unlicensed band is idle; when the initial CCA time or the extended CCA time is in the DRX active time of the UE, the UE only needs to inform the physical layer to monitor the channel of the unlicensed frequency band in the CCA time because the UE has turned on the receiver within the DRX active time.

If the unlicensed frequency band and the licensed frequency band adopt the same DRX mechanism, the UE synchronously enters an activated or sleeping state on the licensed frequency band and the unlicensed frequency band. Therefore, in the time of the CCA in the unlicensed band, the UE wakes up in the licensed band and the unlicensed band at the same time to monitor the channel in the unlicensed band and the channel in the licensed band.

If the unlicensed band and the licensed band use different DRX mechanisms, the UE does not need to enter an active or sleep state simultaneously in the licensed band and the unlicensed band. Therefore, the UE wakes up at the CCA time on the unlicensed frequency band to monitor the channel of the unlicensed frequency band, and does not wake up on the licensed frequency band to monitor the channel, so that the power consumption can be better saved.

S303, when receiving an uplink Scheduling Request (SR) signaling sent by the UE, determining the starting time of the initial CCA time of the UE, and sending second indication information to the UE; or receiving third indication information sent by the UE to obtain a starting time of an initial CCA time of the UE.

If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the starting time of the initial CCA time is determined after the UE generates the uplink buffer data, and the base station cannot know the starting time of the initial CCA time. The UE can inform the base station that the non-authorized channel needs to be monitored through the uplink scheduling request SR, and the base station determines the starting time of the initial CCA time of the UE, or the UE informs the base station after determining the starting time of the initial CCA time.

Specifically, when receiving an uplink scheduling request SR signaling sent by the UE, the base station determines a starting time of an initial CCA time of the UE, and sends second indication information to the UE, where the second indication information is used to indicate the starting time of the initial CCA time of the UE, and the second indication information may be an MAC CE or PDCCH signaling sent by the base station on an authorized frequency band or an unauthorized frequency band; or determining, by the UE, a starting time of an initial CCA time of the UE, receiving, by the base station, third indication information sent by the UE, where the third indication information carries the starting time of the initial CCA time, and obtaining, by the base station, the starting time of the initial CCA time from the third indication information.

S304, determining the starting time of the extended CCA time of the UE, and determining the ending time of the extended CCA time of the UE when receiving the uplink data of the UE.

After the starting time of the initial CCA time of the UE is determined, the starting time of the extended CCA time of the UE can be determined, and the starting time of the extended CCA time is after the initial CCA time is over or after the channel occupation time is over.

Since the extended CCA time length is determined by N randomly selected by the UE between 1 and q, the base station cannot obtain the extended CCA time length. However, the base station may know that the extended CCA time of the UE has ended through uplink data sent by the UE when the extended CCA time ends.

And the base station combines the initial CCA time starting moment, the extended CCA time starting moment and the extended CCA time ending moment into the non-authorized frequency band CCA time information configured by the UE to obtain the non-authorized frequency band CCA time of the UE, including the initial CCA time and the extended CCA time.

S305, data transmission is carried out according to the initial CCA time, the extended CCA time, the DRX activation time and the DRX sleep time of the UE.

In order to ensure the accuracy of detecting a free channel on an unlicensed frequency band by a UE, a base station firstly determines an initial CCA time and an extended CCA time of the UE, and a DRX activation time and a sleep time of the UE.

If the initial CCA time or the extended CCA time of the UE is located in an unauthorized frequency band DRX sleep time interval of the UE, stopping transmitting data or signaling to other UEs except the UE in the initial CCA time or the extended CCA time of the UE on an unauthorized frequency band;

and if the initial CCA time or the extended CCA time of the UE is located in the DRX activation time interval of the non-authorized frequency band of the UE, stopping transmitting data or signaling to the UE and other UEs except the UE in the initial CCA time or the extended CCA time of the UE on the non-authorized frequency band.

And when the initial CCA time is over or the extended CCA time is over, the base station can resume transmitting data or signaling to the UE and other UEs.

In a further embodiment of the present invention, a fourth embodiment provides a method for applying DRX in an unlicensed frequency band, where the method is applied to a UE operating in the unlicensed frequency band, referring to fig. 6, and fig. 6 is a schematic flow chart of the fourth embodiment of the present invention, and the method provided in the fourth embodiment of the present invention includes:

s401, receiving DRX parameters sent by a base station to obtain DRX activation time and DRX sleep time of the UE.

When the UE receives the PDCCH authorization transmitted by the HARQ initially, the UE expects to receive the subsequent PDCCH authorization, so that the Drx-Inactivity Timer is started or restarted, the UE continuously monitors the downlink signal during the running period of the Drx-Inactivity Timer, and the UE stops monitoring the downlink signal after the Drx-Inactivity Timer is stopped. When downlink HARQ Retransmission occurs, the UE expects to receive downlink Retransmission PDCCH authorization, so a Drx-Retransmission Timer is started, and the UE continuously monitors downlink signals during the running period of the Drx-Retransmission Timer until the Drx-Retransmission Timer is stopped after the downlink authorization of the HARQ process is received.

The base station can configure different DRX parameters for the UE, the DRX parameters are sent to the UE through downlink signaling, the UE receives the DRX parameters sent by the base station, and the DRX activation time and the DRX sleep time of the UE are determined according to the DRX parameters and the transmission condition of uplink and downlink data.

S402, receiving first indication information sent by a base station, and obtaining information of the CCA time of the unlicensed frequency band from the first indication information.

[(FrameNum×10)+SFN]％N_{CCA_Cycle}＝N_{CCA_Offset}

For another example, under the load-based LBT mechanism, the unlicensed band CCA time, including the initial CCA time and the extended CCA time, may be determined through an initial CCA time length, an initial CCA time start time, a channel occupation time length, and an extended CCA time contention window length q, where q is an integer greater than or equal to 4 and less than or equal to 32. And the UE randomly selects an integer N from 1 to q, and in the next extended CCA detection time, if the channel is detected to be idle, the N is subtracted from 1, otherwise, the N is unchanged, and when the N is subtracted from 0, the extended CCA time is ended, the channel occupation time is entered, and data transmission is started. The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: the method comprises the steps of obtaining an initial CCA time length, a channel occupation time length and an extended CCA time contention window length q; and after the base station configuration is finished, the CCA time information is sent to the UE, the first indication information is used for carrying the CCA time information of the UE in the unlicensed frequency band, and the UE acquires the CCA time information of the unlicensed frequency band from the first indication information so as to determine the CCA time. The starting time of the initial CCA time is determined after the UE generates uplink cache data, and the starting time of the expanded CCA time is after the initial CCA time or after the channel occupation time.

The first indication information may be RRC signaling sent by the base station on a licensed frequency band.

And S403, according to the indication of the first indication information, waking up at the unauthorized CCA time, and monitoring a channel of an unauthorized frequency band.

The first indication information is used for indicating the UE to wake up at the CCA time of the unlicensed frequency band and monitor a channel of the unlicensed frequency band. And the UE monitors the channel of the unauthorized frequency band according to the indication of the first indication information. When a base station configures a DRX function for UE on an unauthorized frequency band, the UE can acquire DRX sleep time of the UE according to DRX parameters and uplink and downlink data transmission conditions of the UE, and the UE does not monitor a downlink channel during the DRX sleep time. For example, according to the configuration of a base station on the CCA time of the unlicensed band of the UE, the CCA time may be in the DRX sleep time of the UE, and when the CCA time is in the DRX sleep time of the UE, the UE turns on a receiver so as to monitor whether a channel of the unlicensed band is idle; when the CCA time is in the DRX activation time of the UE, the UE is required to inform a physical layer of monitoring a channel of an unlicensed frequency band in the CCA time because the UE turns on a receiver in the DRX activation time.

In a further embodiment of the present invention, a fifth embodiment provides a method for applying DRX in an unlicensed frequency band, where the method is applied to a UE operating in the unlicensed frequency band, referring to fig. 7, and fig. 7 is a schematic flow diagram of the fifth embodiment of the present invention, and the method provided in the fifth embodiment of the present invention includes:

s501, receiving DRX parameters sent by a base station to obtain DRX activation time and DRX sleep time of the UE.

The base station sends the DRX parameters to the UE through downlink signaling, the UE receives the DRX parameters sent by the base station, and determines the DRX activation time and the DRX sleep time of the UE according to the DRX parameters and the transmission condition of uplink and downlink data.

S502, receiving first indication information sent by a base station, and obtaining information of the periodic CCA time from the first indication information.

[(FrameNum×10)+SFN]％N_{CCA_Cycle}＝N_{CCA_Offset}

The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: a period CCA time length, a period CCA time offset, a channel occupancy time length, and an idle time length. And after the base station configuration is finished, the information of the CCA time is sent to the UE, and the first indication information is used for carrying the information of the CCA time of the UE in the unlicensed frequency band so as to inform the CCA time of the UE in the unlicensed frequency band. The first indication information is an RRC signaling sent by the base station on the licensed frequency band.

And the UE acquires the information of the CCA time of the unlicensed frequency band from the first indication information, so that the starting time of the CCA time of each period can be determined by the formula.

S503, according to the indication of the first indication information, waking up in the period CCA time, and monitoring a channel of an unlicensed frequency band.

The first indication information is used for indicating the UE to wake up at the periodic CCA time and monitor a channel of an unlicensed frequency band. And the UE monitors the channel of the unauthorized frequency band according to the indication of the first indication information. When a base station configures a DRX function for UE on an unauthorized frequency band, the UE can acquire DRX sleep time of the UE according to DRX parameters and uplink and downlink data transmission conditions of the UE, and the UE does not monitor a downlink channel during the DRX sleep time. For example, according to the configuration of the base station on the CCA time of the unlicensed band of the UE, the CCA period may be in the DRX sleep time of the UE, and when the CCA period is in the DRX sleep time of the UE, the UE turns on the receiver so as to monitor whether a channel of the unlicensed band is idle; when the period CCA time is in the DRX activation time of the UE, the UE is required to inform a physical layer of monitoring a channel of an unlicensed frequency band in the period CCA time because the UE turns on a receiver in the DRX activation time.

If the unlicensed frequency band and the licensed frequency band adopt the same DRX mechanism, the UE synchronously enters an activated or sleeping state on the licensed frequency band and the unlicensed frequency band. Therefore, in the time of the non-authorized frequency band CCA, the UE wakes up on the authorized frequency band and the non-authorized frequency band simultaneously to monitor the channel of the non-authorized frequency band and the channel of the authorized frequency band.

If the unlicensed band and the licensed band use different DRX mechanisms, the UE does not need to enter an active or sleep state simultaneously in the licensed band and the unlicensed band. The UE wakes up at the CCA time on the unlicensed frequency band to monitor the channel of the unlicensed frequency band, and does not wake up on the licensed frequency band to monitor the channel, so that the power consumption can be better saved.

In another embodiment of the present invention, a sixth embodiment provides a method for applying DRX in an unlicensed frequency band, where the method is applied to a UE operating in the unlicensed frequency band, referring to fig. 8, and fig. 8 is a schematic flow diagram of the sixth embodiment of the present invention, and the method provided by the sixth embodiment of the present invention includes:

s601, receiving DRX parameters sent by a base station to obtain DRX activation time and DRX sleep time of the UE.

S602, receiving first indication information sent by a base station, and obtaining information of an initial CCA time and an extended CCA time from the first indication information.

Under a load-based LBT mechanism, the unlicensed band CCA time including the initial CCA time and the extended CCA time can be determined through the initial CCA time length, the initial CCA time starting time, the channel occupation time length and the extended CCA time inner competition window length q, wherein q is an integer which is greater than or equal to 4 and smaller than or equal to 32. And the UE randomly selects an integer N from 1 to q, and in the next extended CCA detection time, if the channel is detected to be idle, the N is subtracted from 1, otherwise, the N is unchanged, and when the N is subtracted from 0, the extended CCA time is ended, the channel occupation time is entered, and data transmission is started. The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: the method comprises the steps of obtaining an initial CCA time length, a channel occupation time length and an extended CCA time contention window length q; and after the base station configuration is finished, the CCA time information is sent to the UE, the first indication information is used for carrying the CCA time information of the UE in the unlicensed frequency band, and the UE acquires the CCA time information of the unlicensed frequency band from the first indication information so as to determine the CCA time. The starting time of the initial CCA time is determined after the UE generates uplink cache data, and the starting time of the expanded CCA time is after the initial CCA time or after the channel occupation time. The first indication information is an RRC signaling sent by the base station on the licensed frequency band.

S603, after sending the uplink SR signaling to the base station, receiving second indication information sent by the base station to obtain the starting time of the initial CCA time; or sending third indication information to the base station to indicate the starting time of the initial CCA time of the base station.

If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the starting time of the initial CCA time is determined after the UE generates uplink buffer data, the base station cannot know the starting time of the initial CCA time, the extended CCA time length is determined by an integer N randomly selected by the UE between 1 and q, and the base station cannot know the extended CCA time length. The UE can inform the base station that the base station needs to start monitoring an unlicensed channel through the uplink scheduling request SR, the base station determines the starting time of the initial CCA time of the UE, the base station sends the starting time of the initial CCA time to the UE, or the UE informs the base station after determining the starting time of the initial CCA time. In order to obtain the extended CCA time length, the UE may send uplink data to the base station after the extended CCA time is finished, so as to indicate that the extended CCA time of the base station is finished.

Specifically, the UE sends an uplink SR signaling to the base station to indicate that the base station is to start monitoring a channel of an unlicensed frequency band, the base station determines a start time of an initial CCA time of the UE, and sends second indication information to the UE, where the second indication information includes the start time of the initial CCA time; the second indication information may be MAC CE or PDCCH signaling transmitted by the base station on the licensed or unlicensed frequency band. Or, the UE determines a starting time of the initial CCA time, and sends third indication information to the base station, where the third indication information includes the starting time of the initial CCA time, and is used for the base station to obtain the starting time of the initial CCA time. And when the extended CCA time is finished, transmitting uplink data to the base station to indicate that the extended CCA time of the base station is finished.

S604, determining the starting time of the extended CCA time, and when the extended CCA time is finished, sending uplink data to the base station to indicate that the extended CCA time of the base station is finished.

The UE may obtain the start time of the extended CCA time according to the start time of the initial CCA time determined in the above step, where the start time of the extended CCA time is after the initial CCA time or after the channel occupation time.

In order to enable a base station to know the end time of the extended CCA time, when the extended CCA time is ended, uplink data is sent to the base station to indicate that the extended CCA time of the base station is ended.

And S605, according to the indication of the first indication information, waking up at the initial CCA time and the extended CCA time, and monitoring a channel of an unlicensed frequency band.

The first indication information is used for indicating the UE to wake up at the initial CCA time and the extended CCA time and monitoring a channel of an unlicensed frequency band. And the UE monitors the channel of the unauthorized frequency band according to the indication of the first indication information. When a base station configures a DRX function for UE on an unauthorized frequency band, the UE can acquire DRX sleep time of the UE according to DRX parameters and uplink and downlink data transmission conditions of the UE, and the UE does not monitor a downlink channel during the DRX sleep time. For example, according to the configuration of the base station on the CCA time of the unlicensed band of the UE, the initial CCA time or the extended CCA time may be in the DRX sleep time of the UE, and when the initial CCA time or the extended CCA time is in the DRX sleep time of the UE, the UE turns on a receiver so as to monitor whether a channel of the unlicensed band is idle; when the initial CCA time or the extended CCA time is in the DRX active time of the UE, the UE only needs to inform the physical layer to monitor the channel of the unlicensed frequency band in the CCA time because the UE has turned on the receiver within the DRX active time.

And when the initial CCA time is over or the extended CCA time is over, the UE stops monitoring the unlicensed frequency band channel and can send data.

An embodiment of the present invention provides a base station device applying DRX in an unlicensed frequency band, where referring to fig. 9, the base station device a00 may include:

a processing unit a10, configured to configure discontinuous reception, DRX, parameters for a UE to obtain a DRX active time and a DRX sleep time of the UE;

a transmitting unit a20, configured to transmit the DRX parameters to the UE;

the processing unit a10 is further configured to set information of an unlicensed band channel CCA time of the UE;

the sending unit a20 is further configured to send first indication information to the UE, where the first indication information is used to indicate that the UE wakes up at the CCA time of the unlicensed frequency band, and monitors a channel of the unlicensed frequency band;

the transmitting unit a20 is further configured to transmit data according to the CCA time of the unlicensed band of the UE, the DRX active time of the UE, and the DRX sleep time;

if the load-based LBT mechanism is adopted, the base station device may further include a receiving unit a30, configured to receive the third indication information sent by the UE.

When the same DRX mechanism is adopted in the authorized frequency band and the unauthorized frequency band, the processing unit a10 configures a set of DRX parameters for the UE, and can simultaneously control the DRX active state and the DRX sleep state of the UE on the authorized frequency band and the unauthorized frequency band; for example, if downlink HARQ Retransmission occurs in the licensed band, the UE starts a Timer Drx-Retransmission Timer, and during the Timer running, the UE is in an active state in both the licensed band and the unlicensed band.

When different DRX mechanisms are used in the licensed band and the unlicensed band, the processing unit a10 may control, for the UE, two sets of DRX parameters, a DRX active state and a DRX sleep state of the UE on the licensed band and on the unlicensed frequency, respectively; for example, the UE opens the receiver in the licensed band and closes the receiver in the unlicensed band at the On-Duration time of the licensed band, and the UE opens the receiver in the unlicensed band and closes the receiver in the licensed band at the On-Duration time of the unlicensed band.

If an LBT mechanism based on a frame structure is adopted in the unlicensed frequency band, the CCA time information configured by the processing unit a10 for the UE includes: a period CCA time length, a period CCA time offset, a channel occupation time length and an idle time length; if a load-based LBT mechanism is adopted in the unlicensed frequency band, the CCA time information configured by the processing unit a10 for the UE includes: the CCA time duration comprises an initial CCA time length, a channel occupation time length and an extended CCA time contention window length q, wherein q is an integer which is greater than or equal to 4 and less than or equal to 32.

After the processing unit a10 configures the CCA time information, the transmitting unit a20 transmits the information of the CCA time to the UE through the first indication information, where the first indication information carries information of the UE unlicensed band CCA time, and the UE obtains the information of the unlicensed band CCA time from the first indication information, so as to determine the CCA time. The first indication information is used for indicating the UE to wake up at the time of the CCA in the unlicensed frequency band and monitor a channel of the unlicensed frequency band; if the CCA time of the unlicensed frequency band is overlapped with the DRX sleep time, the UE wakes up at the DRX sleep time and monitors a channel of the unlicensed frequency band. The first indication information is RRC signaling sent by the base station on the authorized frequency band.

If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the starting time of the initial CCA time is determined after the UE generates the uplink buffer data, the base station cannot know the starting time of the initial CCA time, the extended CCA time length is determined by the random number N whose value is between 1 and q, and the base station cannot know the extended CCA time length. The base station device can know that the UE needs to monitor the unlicensed channel through the uplink scheduling request SR, and a sending unit a20 sends an instruction to the UE to indicate the starting time of the initial CCA time; or after the UE determines the starting time of the initial CCA time, the UE informs the base station through uplink indication information so that the base station can acquire the starting time of the initial CCA time. And the starting time of the extended CCA time is after the initial CCA time or after the channel occupation time. The processing unit a10 may receive, through the receiving unit a30, uplink data sent by the UE after the extended CCA time ends, and obtain an extended CCA time end time. The processor a10 may use the initial CCA time starting time and the extended CCA time starting time to combine with the unlicensed band CCA time information configured by the UE, to obtain an initial CCA time and an extended CCA time.

Specifically, when receiving an uplink scheduling request SR signaling sent by the UE, the processing unit a10 determines a starting time of an initial CCA time of the UE, and sends second indication information to the UE through the sending unit a20, where the second indication information is used to indicate the starting time of the initial CCA time of the UE; or, determining, by the UE, a starting time of the initial CCA time of the UE, and receiving, by a receiving unit a30, third indication information sent by the UE, where the third indication information carries the starting time of the initial CCA time. The receiving unit a30 receives uplink data transmitted by the UE after the extended CCA time ends, so that the processing unit a10 obtains the extended CCA time end time.

In order to ensure the accuracy of detecting a clear channel on an unlicensed frequency band by a UE, if the CCA time of the UE is located in an unlicensed frequency band DRX sleep time interval of the UE, the transmitting unit a20 stops transmitting data or signaling to UEs other than the UE within the CCA time of the UE on the unlicensed frequency band; if the CCA time of the UE is located in the DRX activation time interval of the unlicensed frequency band of the UE, the sending unit a20 stops sending data or signaling to the UE and other UEs except the UE within the CCA time of the UE in the unlicensed frequency band.

If the same DRX mechanism is adopted by the unlicensed frequency band and the licensed frequency band, the UE synchronously enters an activated or sleeping state on the licensed frequency band and the unlicensed frequency band. Therefore, in the time of the CCA in the unlicensed band, the first indication information indicates that the UE wakes up on the licensed band and the unlicensed band at the same time, and monitors a channel in the unlicensed band and a channel in the licensed band.

An eighth embodiment of the present invention provides a terminal device that applies DRX in an unlicensed frequency band, where referring to fig. 10, the terminal device b00 may include:

a receiving unit b10, configured to receive a DRX parameter sent by a base station to obtain a DRX active time and a DRX sleep time of the UE, and further configured to receive first indication information sent by the base station, and obtain information of a CCA time of an unlicensed frequency band from the first indication information;

a processing unit b20, configured to wake up the receiver at the CCA time of the unlicensed frequency band according to the indication of the first indication information, and monitor a channel of the unlicensed frequency band;

if the load-based LBT mechanism is adopted, the terminal device further includes a sending unit b30, configured to send third indication information to the base station, where the third indication information includes a starting time of an initial CCA time of the UE.

The receiving unit b10 receives the DRX parameters sent by the base station, and the UE can determine the DRX active time and DRX sleep time of the UE according to the DRX parameters and uplink and downlink data transmission conditions.

When the same DRX mechanism is adopted in the authorized frequency band and the unauthorized frequency band, the receiving unit b10 receives a set of DRX parameters configured by the base station for the UE, and can simultaneously control the DRX active state and the DRX sleep state of the UE on the authorized frequency band and the unauthorized frequency band; for example, if downlink HARQ Retransmission occurs in the licensed band, the UE starts a Timer Drx-Retransmission Timer, and during the Timer running, the UE is in an active state in both the licensed band and the unlicensed band.

When different DRX mechanisms are used in the authorized frequency band and the unauthorized frequency band, the receiving unit b10 receives two sets of DRX parameters configured for the UE by the base station, and respectively controls the DRX activation state and the DRX sleep state of the UE on the authorized frequency band and the unauthorized frequency band; for example, the UE opens the receiver in the licensed band and closes the receiver in the unlicensed band at the On-Duration time of the licensed band, and the UE opens the receiver in the unlicensed band and closes the receiver in the licensed band at the On-Duration time of the unlicensed band.

The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: a period CCA time length, a period CCA time offset, a channel occupancy time length, and an idle time length. And after the base station configuration is finished, the information of the CCA time is sent to the UE through the first indication information so as to inform the UE of the CCA time of the unlicensed frequency band. The receiving unit b10 obtains the information of the CCA time of the unlicensed band from the first indication information, so that the processing unit b20 determines the CCA time. The first indication information is used for indicating that the processing unit b20 receiver should wake up at the CCA time of the unlicensed frequency band to monitor a channel of the unlicensed frequency band; if the CCA time of the unlicensed band overlaps with the DRX sleep time, the processing unit b20 makes the receiver wake up at the DRX sleep time to monitor the channel of the unlicensed band. The first indication information is RRC signaling sent by the base station on a licensed frequency band.

If the LBT mechanism based on the frame structure is adopted in the unlicensed frequency band, the CCA time information configured by the base station received by the receiving unit b10 includes: a period CCA time length, a period CCA time offset, a channel occupation time length and an idle time length; if the LBT mechanism based on the load is adopted in the unlicensed frequency band, the receiving unit b10 may receive CCA time information configured by the base station for the UE, where the CCA time information includes: the CCA time duration comprises an initial CCA time length, a channel occupation time length and an extended CCA time contention window length q, wherein q is an integer which is greater than or equal to 4 and less than or equal to 32.

If the LBT mechanism in the unlicensed frequency band is the frame structure-based LBT mechanism, the processing unit b20 may obtain the periodic CCA time according to the CCA time information in the first indication message. If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, in order to maintain a CCA time synchronized with the base station, the receiving unit b10 further needs to receive second indication information sent by the base station, where the second indication information is received after sending an uplink SR signaling to the base station, and is used by the processing unit b20 to obtain a starting time of the initial CCA time; or, the processing unit b20 determines the starting time of the initial CCA time, and transmits third indication information to the base station through the transmitting unit a30, where the third indication information is used to indicate the starting time of the initial CCA time to the base station.

When the initial CCA time is over or when the extended CCA time is over, the processing unit b20 stops listening to the channel of the unlicensed band, and the transmitting unit b30 may start transmitting data. By the transmitting unit b30, transmitting uplink data at the end of the extended CCA time, the base station may know the end time of the extended CCA time.

If the same DRX mechanism is adopted by the unlicensed frequency band and the licensed frequency band, the processing unit b20 enables the receiver to wake up on the licensed frequency band and the unlicensed frequency band simultaneously within the time of the unlicensed frequency band CCA, and monitors the channel of the unlicensed frequency band and the channel of the licensed frequency band;

if the unlicensed band and the licensed band use different DRX mechanisms, the processing unit b20 wakes up the receiver at the CCA time on the unlicensed band to monitor the channel of the unlicensed band.

An embodiment of the present invention further provides a base station device applying DRX in an unlicensed frequency band, where referring to fig. 11, a base station device c00 provided in a ninth embodiment of the present invention may include: at least one processor c10, a bus c20, at least one and memory c30 connected to the bus, and a communication interface c 40.

The memory c30 is used to store computer executing instructions, and the processor c10 calls the computer executing instructions stored in the memory c30 and executes the instructions through the bus c 20. When receiving data sent by an external device, the communication interface c40 is used for receiving data from the external device, writing the data into the memory c30 through the bus c20, and then processing the data written into the memory d30 by the processor c 10; when transmitting data to an external device, the processor c10 writes the processed data to the memory c30 through the bus, then transmits the processed data to the communication interface c40 through the bus c20, and finally the communication interface c40 transmits the data to the external device. So that the base station apparatus performs the methods as in the fourth to sixth embodiments and the eighth embodiment.

The processor c10 configures Discontinuous Reception (DRX) parameters for the UE, and sends signaling to the UE through the communication interface c40 to enable the UE to obtain DRX active time and DRX sleep time.

The processor c10 sets information of the CCA time of the unlicensed band channel of the UE, and sends first indication information to the UE through the communication interface c40, where the first indication information is used to indicate that the UE wakes up at the CCA time of the unlicensed band to monitor the channel of the unlicensed band. The processing unit c10 sends data to the UE through the communication interface c40 according to the CCA time of the unlicensed band of the UE, the DRX active time and the DRX sleep time of the UE. If the load-based LBT mechanism is adopted, the communication interface c40 may also receive third indication information sent by the UE.

The first indication information carries information of the CCA time of the UE in the unlicensed frequency band, and the UE acquires the information of the CCA time of the unlicensed frequency band from the first indication information so as to determine the CCA time. The first indication information is used for indicating the UE to wake up at the time of the CCA in the unlicensed frequency band and monitor a channel of the unlicensed frequency band; if the CCA time of the unlicensed frequency band is overlapped with the DRX sleep time, the UE wakes up at the DRX sleep time and monitors a channel of the unlicensed frequency band. The first indication information is RRC signaling sent by the base station on the authorized frequency band.

If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, the starting time of the initial CCA time is determined after the UE generates the uplink buffer data, the base station cannot know the starting time of the initial CCA time, the extended CCA time length is determined by the random number N whose value is between 1 and q, and the base station cannot know the extended CCA time length. When receiving an uplink scheduling request SR signaling transmitted by the UE, the processor c10 may determine a starting time of an initial CCA time of the UE, and transmit second indication information to the UE through the communication interface c40, where the second indication information is used to indicate the starting time of the initial CCA time of the UE; or, the UE determines the starting time of the initial CCA time of the UE, and the communication interface c40 receives third indication information sent by the UE and then delivers the third indication information to the processing unit for processing, where the third indication information carries the starting time of the initial CCA time. The communication interface c40 receives uplink data transmitted by the UE at the end of the extended CCA time, so that the processor c10 obtains the end time of the extended CCA time of the UE, thereby obtaining the extended CCA time of the UE.

In order to ensure the accuracy of detecting a clear channel by the UE on the unlicensed frequency band, if the CCA time of the UE is located in the DRX sleep time interval of the unlicensed frequency band of the UE, the processing unit c10 may control the communication interface c40 to stop sending data or signaling to the UEs other than the UE within the CCA time of the UE on the unlicensed frequency band; if the CCA time of the UE is within the DRX activation time interval of the unlicensed frequency band of the UE, in the unlicensed frequency band, the processor c10 may control the communication interface c40 to stop sending data or signaling to the UE and other UEs except the UE within the CCA time of the UE.

An embodiment of the present invention further provides a terminal device that applies DRX in an unlicensed frequency band, where referring to fig. 12, a terminal device d00 provided in the tenth embodiment of the present invention may include: at least one processor d10, a bus d20, at least one memory d30 connected to the bus, and a communication interface d 40.

The memory d30 is used to store computer executing instructions, and the processor d10 calls the computer executing instructions stored in the memory d30 and executes the instructions through the bus d 20. When receiving data sent by an external device, the communication interface d40 is used for receiving data from the external device, writing the data into the memory d30 through the bus d20, and then processing the data written into the memory d30 by the processor d 10; when transmitting data to an external device, the processor c10 writes the processed data to the memory d30 through the bus, then transmits the processed data to the communication interface d40 through the bus d20, and finally the communication interface d40 transmits the data to the external device. So that the terminal device executes the methods as in embodiments one to three and embodiment seven.

The communication interface d40 receives the DRX parameters sent by the base station, so that the processor d10 obtains the DRX activation time and the DRX sleep time according to the DRX parameters; the communication interface d40 also receives the first indication information transmitted by the base station, so that the processor d10 obtains the information of the CCA time of the unlicensed band from the first indication information.

The processor d10 instructs the receiver to wake up at the CCA time of the unlicensed band to listen to the channel of the unlicensed band according to the first indication information. If the load-based LBT mechanism is adopted, the communication interface d10 further needs to send a third indication message to the base station, where the third indication message includes the starting time of the initial CCA time of the UE determined by the processor.

The information of the CCA time of the unlicensed band is configured by the base station, and comprises the following steps: a period CCA time length, a period CCA time offset, a channel occupancy time length, and an idle time length. And after the base station configuration is finished, the information of the CCA time is sent to the UE through the first indication information so as to inform the UE of the CCA time of the unlicensed frequency band. The communication interface d40 receives first indication information carrying unlicensed band CCA time information from a base station to facilitate the processor d10 to determine CCA time. The first indication information is used for indicating that the processor receiver is required to wake up at the CCA time of the unlicensed frequency band and monitor a channel of the unlicensed frequency band; if the CCA time of the unlicensed band overlaps with the DRX sleep time, the processor d10 instructs the receiver to wake up at the DRX sleep time and monitor the channel of the unlicensed band. The first indication information is RRC signaling sent by the base station on the authorized frequency band.

If the LBT mechanism based on the frame structure is adopted in the unlicensed frequency band, the CCA time information configured by the base station received by the communication interface d40 includes: a period CCA time length, a period CCA time offset, a channel occupation time length and an idle time length; if the load-based LBT mechanism is adopted in the unlicensed frequency band, the CCA time information configured for the UE received by the communication interface d40 includes: the CCA time duration comprises an initial CCA time length, a channel occupation time length and an extended CCA time contention window length q, wherein q is an integer which is greater than or equal to 4 and less than or equal to 32.

If the LBT mechanism in the unlicensed band is the frame structure-based LBT mechanism, the processor d10 may obtain the periodic CCA time according to the CCA time information in the first indication message. If the LBT mechanism on the unlicensed frequency band is a load-based LBT mechanism, in order to maintain a CCA time for the UE to synchronize with the base station, the communication interface d40 further needs to receive second indication information sent by the base station, where the second indication information is received after sending an uplink SR signaling to the base station, and is used for the processor d10 to obtain a starting time of the initial CCA time; or, the processor d10 determines the starting time of the initial CCA time, and sends third indication information to the base station through the communication interface d40, where the third indication information is used to indicate the starting time of the initial CCA time to the base station.

When the initial CCA time is over or when the extended CCA time is over, the processor d10 causes the receiver to stop listening to the channel in the unlicensed frequency band and start transmitting data through the communication interface d 40. The base station can acquire the end time of the extended CCA time through the received uplink data.

If the same DRX mechanism is adopted by the unauthorized frequency band and the authorized frequency band, the processor d10 enables the receiver to wake up on the authorized frequency band and the unauthorized frequency band simultaneously and monitor the channel of the unauthorized frequency band and the channel of the authorized frequency band within the CCA time of the unauthorized frequency band;

if the unlicensed band and the licensed band use different DRX mechanisms, the processor d10 wakes up the receiver at the CCA time of the unlicensed band to monitor the channel of the unlicensed band.

As will be appreciated by one of ordinary skill in the art, various aspects of the invention, or possible implementations of various aspects, may be embodied as a system, method, or computer program product. Furthermore, aspects of the invention, or possible implementations of aspects, may take the form of a computer program product, which refers to computer-readable program code stored in a computer-readable medium.

The computer readable medium may be a computer readable data medium or a computer readable storage medium. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as Random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, and portable read-only memory (CD-ROM).

A processor in the computer reads the computer-readable program code stored in the computer-readable medium, so that the processor can perform the functional actions specified in each step, or a combination of steps, in the flowcharts; and means for generating a block diagram that implements the functional operation specified in each block or a combination of blocks.

The computer readable program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's own computer and partly on a remote computer or entirely on the remote computer or server. It should also be noted that, in some alternative implementations, the functions noted in the flowchart or block diagram block may occur out of the order noted in the figures. For example, two steps or two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

The method and the device for data transmission in an unlicensed frequency band disclosed in the embodiments of the present invention are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method for applying Discontinuous Reception (DRX) in an unlicensed frequency band, which is applicable to a base station device operating in the unlicensed frequency band, comprises the following steps:

2. The method of claim 1, wherein the first indication information is further used to carry information of the UE unlicensed band CCA time to inform the UE of the unlicensed band CCA time.

3. The method according to claim 1 or 2, wherein the first indication information is used for indicating that the UE wakes up at the CCA time of the unlicensed band, and includes:

4. The method of claim 2, wherein the first indication information carries information of the UE unlicensed band CCA time, and wherein,

5. The method according to claim 1 or 2, wherein the sending of the first indication information to the UE is specifically: and sending first indication information to the UE in an authorized frequency band through Radio Resource Control (RRC) signaling.

6. The method of claim 4, wherein after sending the first indication information to the UE if the LBT mechanism in the unlicensed band is a load-based LBT mechanism, the method further comprises:

7. The method of claim 6, wherein the determining an initial CCA time start time for the UE, the method further comprises:

determining a starting time of an extended CCA time of the UE;

8. The method of claim 1, wherein the first indication information is used to indicate that the UE wakes up at a CCA time of an unlicensed band, and listens to a channel of the unlicensed band, and includes:

9. The method of claim 1, wherein the transmitting data according to the CCA time of the UE, the DRX active time of the UE and the DRX sleep time comprises:

if the CCA time of the UE is located in the DRX activation time interval of the UE, stopping transmitting data or signaling to the UE and other UEs except the UE in the CCA time of the UE on the unlicensed frequency band;

10. A method for applying DRX in an unlicensed frequency band, which is applied to a UE working in the unlicensed frequency band, comprises the following steps:

11. The method of claim 10, wherein the waking up at the unlicensed CCA time and listening to a channel of an unlicensed band comprises:

12. The method of claim 10,

13. The method according to claim 10, wherein the receiving the first indication information sent by the base station specifically includes: and receiving the first indication information by receiving RRC signaling sent by the base station on the authorized frequency band.

14. The method of claim 12, wherein if the LBT mechanism in the unlicensed band is a load-based LBT mechanism, after obtaining information of a CCA time in the unlicensed band from the first indication information, the method further comprises:

15. The method of claim 14, wherein after determining a starting time of the initial CCA time, the method further comprises:

determining a starting time of the extended CCA time;

16. The method of claim 10, wherein waking up at the unlicensed CCA time to listen to a channel of an unlicensed band comprises:

17. A base station apparatus for applying DRX in an unlicensed frequency band, comprising:

a sending unit, configured to send the DRX parameter to the UE;

18. The device of claim 17, wherein the first indication information is further configured to carry information of the UE unlicensed band CCA time, so as to inform the UE of the unlicensed band CCA time.

19. The apparatus of claim 17 or 18, wherein the first indication information is configured to indicate that the UE wakes up at the CCA time of the unlicensed band, and includes:

20. The device of claim 18, wherein the first indication information carries information of the UE unlicensed band CCA time, and wherein,

21. The method according to claim 17 or 18, wherein the sending unit is further configured to send first indication information to the UE, and the method comprises:

22. The apparatus of claim 20, wherein if the LBT mechanism in the unlicensed frequency band is a load-based LBT mechanism, the configuring unit is further configured to determine a starting time of an initial CCA time of the UE when receiving an uplink Scheduling Request (SR) signaling sent by the UE,

23. The device of claim 22, wherein the processing unit is further configured to:

determining a starting time of an extended CCA time of the UE;

24. The apparatus of claim 17, wherein the first indication information is used to indicate that the UE wakes up at a CCA time of an unlicensed band, and listens to a channel of the unlicensed band, and includes:

25. The apparatus of claim 17, wherein the sending unit performs data transmission according to the unlicensed band CCA time of the UE, the DRX active time and the DRX sleep time of the UE, and comprises:

if the CCA time of the UE is located in the DRX activation time interval of the UE, the sending unit stops sending data or signaling to the UE and other UEs except the UE within the CCA time of the UE on the unlicensed frequency band;

26. A terminal device for applying DRX in an unlicensed frequency band, comprising:

27. The device of claim 26, wherein the processing unit causes the receiver to wake up at the unlicensed CCA time and listen to a channel of an unlicensed band, comprising:

28. The apparatus of claim 26, wherein if the LBT mechanism in the unlicensed band is a frame structure-based LBT mechanism, the information of the CCA time in the unlicensed band comprises: a periodic CCA time offset, a periodic CCA time length, a channel occupancy time length, and an idle time length;

29. The apparatus of claim 26, wherein the receiving unit is further configured to receive first indication information sent by a base station, and the first indication information includes:

30. The device of claim 28, wherein if the LBT mechanism in the unlicensed frequency band is a load-based LBT mechanism, the receiving unit is further configured to receive second indication information sent by the base station after sending an uplink SR signaling to the base station, so as to determine a starting time of the initial CCA time; or,

31. The apparatus of claim 30,

32. The device of claim 26, wherein the processing unit is configured to wake up at the unlicensed CCA time and listen to a channel of an unlicensed frequency band, and wherein the processing unit is configured to: