CN113475142B - DRX timer control method, device, terminal and storage medium - Google Patents

DRX timer control method, device, terminal and storage medium Download PDF

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Publication number
CN113475142B
CN113475142B CN201980092855.2A CN201980092855A CN113475142B CN 113475142 B CN113475142 B CN 113475142B CN 201980092855 A CN201980092855 A CN 201980092855A CN 113475142 B CN113475142 B CN 113475142B
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drx
timer
channel
time
indication
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CN113475142A (en
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石聪
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application provides a DRX timer control method, a DRX timer control device, a terminal and a storage medium, and relates to the technical field of communication. The method comprises the following steps: monitoring a first channel occupation indication for indicating successful occupation of a channel on an unlicensed spectrum; and controlling the state of a Discontinuous Reception (DRX) timer according to a monitoring result of the first channel occupation indication, wherein the monitoring result comprises monitoring the first channel occupation indication or not monitoring the first channel occupation indication. The method provided by the embodiment of the application does not need to configure longer timer duration for the terminal, does not need to reduce the duration of the DRX period configured for the terminal by a certain duration, and reduces the power consumption of the terminal under the condition of ensuring that the success rate of discontinuous reception of the terminal can be increased.

Description

DRX timer control method, device, terminal and storage medium
Technical Field
The present application relates to the field of communications technologies, and in particular, to a DRX timer control method, apparatus, terminal, and storage medium.
Background
In NR-U (New Radio Unlicensed), a base station needs to listen whether a Channel of an Unlicensed spectrum is available before scheduling a terminal, and the available Channel has an MCOT (Maximum Channel occupancy Time) within which the terminal may be scheduled.
In the NR-U, the terminal may use a DRX (Discontinuous Reception) mechanism to discontinuously monitor a PDCCH (Physical Downlink Control Channel), so as to achieve the purpose of power saving. In the DRX mechanism, the terminal maintains various DRX timers, such as a DRX on timer, a DRX off timer, a DRX downlink retransmission timer, a DRX uplink retransmission timer, and a random access contention resolution timer, and is temporally divided into a plurality of consecutive DRX cycles, each DRX cycle including an active period and a sleep period, and the terminal is in the active period during the operation of any one of the DRX timers and needs to monitor the PDCCH. If the terminal is not scheduled by the base station during the operation of the DRX timer, the terminal may enter a sleep period after the DRX timer expires, and the terminal does not monitor the PDCCH at this time. However, when the base station successfully seizes the channel, the terminal may enter a sleep period, which may result in that the terminal cannot be successfully scheduled, so that the terminal fails to receive discontinuously.
In order to improve the probability of successful scheduling of the terminal, it is currently proposed to configure a longer timer duration for the terminal, or reduce the duration of a DRX cycle configured for the terminal by a certain duration threshold, so as to increase the probability of the terminal being scheduled. However, this also increases the power consumption of the terminal.
Disclosure of Invention
The embodiment of the application provides a DRX timer control method, a DRX timer control device, a terminal and a storage medium, which can be used for solving the problem that the power consumption of the terminal is increased due to the adoption of a method for providing the probability of successful scheduling of the terminal in the related art. The technical scheme is as follows:
in one aspect, a DRX timer control method is provided, and the method includes:
monitoring a first channel occupation indication for indicating successful occupation of a channel on an unlicensed spectrum;
and controlling the state of a Discontinuous Reception (DRX) timer according to a monitoring result of the first channel occupation indication, wherein the monitoring result comprises monitoring the first channel occupation indication or not monitoring the first channel occupation indication.
In another aspect, an apparatus for controlling a DRX timer is provided, the apparatus comprising:
the monitoring module is used for monitoring a first channel occupation indication for indicating successful occupation of a channel on the unlicensed spectrum;
and the control module is used for controlling the state of the Discontinuous Reception (DRX) timer according to a monitoring result of the first channel occupation indication, wherein the monitoring result comprises that the first channel occupation indication is monitored or the first channel occupation indication is not monitored.
In another aspect, a terminal is provided, which includes a processor and a memory, where the memory stores at least one instruction for execution by the processor to implement the method of any one of the above aspects.
In another aspect, a computer-readable storage medium is provided, the computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any one of the above aspects.
In another aspect, a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of the above aspects is provided.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
and monitoring a first channel occupation indication, wherein the first channel occupation indication can be used for indicating whether the channel on the unlicensed spectrum is successfully occupied or not, so that the state of the DRX timer can be controlled according to the monitoring result of the first channel occupation indication, and the terminal can be guaranteed to be successfully scheduled within the channel occupation time. Therefore, the longer time of the timer does not need to be configured for the terminal, the time of the DRX period configured for the terminal does not need to be shortened for a certain time, and the power consumption of the terminal is reduced under the condition of ensuring that the success rate of discontinuous reception of the terminal can be increased.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an implementation environment shown in accordance with an exemplary embodiment;
fig. 2 is a flowchart of a DRX timer control method according to an exemplary embodiment of the present application;
fig. 3 is a flowchart of a DRX timer control method according to another exemplary embodiment of the present application;
fig. 4 is a diagram illustrating a channel occupancy situation in various DRX cycles according to an exemplary embodiment;
fig. 5 is a flowchart of a DRX timer control method according to another exemplary embodiment of the present application;
FIG. 6 is a diagram illustrating channel occupancy for various DRX cycles, according to another example embodiment;
fig. 7 is a schematic structural diagram of a DRX timer control apparatus according to an exemplary embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal according to another exemplary embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Before describing the control method of the DRX timer provided in the embodiment of the present application in detail, an application scenario and an implementation environment related to the embodiment of the present application are briefly described.
First, a brief introduction is made to an application scenario related to the embodiment of the present application.
Currently, if a terminal customizes a DRX mechanism, the terminal generally needs to monitor a PDCCH channel during a DRX active period. As an example, the terminal in DRX active period at least includes the following cases: any one of 5 timers, a DRX duration timer (DRX-onDurationTimer), a DRX inactivity timer (DRX-inactivity timer), a DRX downlink retransmission timer (DRX-retransmission timer dl), a DRX uplink retransmission timer (DRX-retransmission timer ul), and a random access contention resolution timer (Ra-ContentionResolutionTimer), which are maintained by the terminal, is running.
In the current DRX mechanism, the start condition or the restart condition of the above five timers are respectively:
DRX duration timer: the terminal determines the starting time according to whether the terminal is in the short DRX period or the long DRX period, and the specific provisions are as follows: if a short DRX cycle is used and the current subframe satisfies [ (SFN × 10) + subframe number ] module (DRX-ShortCycle) (DRX-StartOffset) module (DRX-ShortCycle); alternatively, if a long DRX cycle is used, and the current subframe satisfies [ (SFN × 10) + subframe number ] module (DRX-LongCycle) ═ DRX-StartOffset. In the above formula, [ (SFN × 10) + subframe number ] indicates the current subframe number, DRX-ShortCycle indicates the short DRX cycle, DRX-LongCycle indicates the long DRX cycle, DRX-StartOffset is the offset of the network configuration, and modulo indicates the modulo operation. Further, the DRX duration timer is started at a time after DRX-SlotOffset slots from the beginning of the current subframe, which can be configured by the network.
DRX inactivity timer: if the terminal receives a PDCCH data indicating downlink or uplink initial transmission, the terminal starts or restarts the DRX inactivity timer.
DRX downlink retransmission timer: if the terminal receives a PDCCH indicating downlink transmission, or if the terminal receives a MAC (Media Access Control) PDU (Protocol Data Unit) on the configured downlink grant resource, the terminal starts a DRX-HARQ-RTT-timerll corresponding to an HARQ (Hybrid Automatic Repeat ReQuest) process after completing transmission of HARQ process feedback for the current downlink transmission, and simultaneously stops a DRX downlink retransmission timer corresponding to the HARQ process. And if a timer DRX-HARQ-RTT-TimerDL corresponding to a certain HARQ of the terminal is overtime and the downlink data transmitted by using the HARQ process is unsuccessfully decoded, the terminal starts a DRX downlink retransmission timer corresponding to the HARQ process.
DRX uplink retransmission timer: if the terminal receives a PDCCH indicating uplink transmission or if the terminal sends a MAC PDU on the configured uplink authorized resource, the terminal starts DRX-HARQ-RTT-TimeUL corresponding to the HARQ process after finishing the uplink transmission, and stops the DRX uplink retransmission timer corresponding to the HARQ process. And if a timer DRX-HARQ-RTT-TimerUL corresponding to a certain HARQ of the terminal is overtime, the terminal starts a DRX uplink retransmission timer corresponding to the HARQ process.
Random access contention resolution timer: in the random access procedure, after MSG3 sends, the terminal starts to start the random access contention resolution timer, during which time the terminal continuously monitors the PDCCH channel. If the random access contention resolution timer times out, the random access procedure needs to be reinitiated.
Next, a brief description will be given of an implementation environment related to the embodiments of the present application.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an implementation environment according to an exemplary embodiment, where the implementation environment mainly includes a terminal 110 and a base station 120, where the terminal 110 may access the base station 120 through a communication network. The base station 120 may schedule the terminal 110, and further, in an NR-U service scenario, the base station 120 may schedule the terminal 110 after successfully camping on a channel, and the terminal 110 may be configured to execute the DRX timer control method provided in this embodiment.
Referring to fig. 2, fig. 2 is a flowchart illustrating a DRX timer control method according to an exemplary embodiment, which may be applied to the real-time environment illustrated in fig. 1 and is mainly performed by a terminal, and the method may include the following implementation steps:
step 201: monitoring a first channel occupancy indication indicating successful camping on a channel on the unlicensed spectrum.
As an example, the first channel occupancy indication may be a DMRS (Demodulation Reference signal), or the first channel occupancy indication may be a signal transmitted on a PDCCH.
In the NR-U, the base station needs to listen to a channel on the NR-U before scheduling the terminal, and if the listening result indicates that the channel is in an idle state, after successfully camping on the channel, the base station may send a first channel camping indication to the terminal to notify the terminal that the channel is successfully camped on by the first channel camping indication. Otherwise, if the interception result indicates that the channel is in an occupied state, the base station does not send the first channel occupation indication to the terminal.
As an example, when the first channel occupancy indication is a DMRS, the base station may transmit the DMRS to the terminal after successfully camping on a channel on the unlicensed spectrum, and for the terminal, if receiving the DMRS, may determine that the base station has successfully camped on the channel on the unlicensed spectrum.
As another example, when the first channel occupancy indication is a signal transmitted on a PDCCH, the base station may transmit the first channel occupancy indication on the PDCCH after successfully camping on a channel on the unlicensed spectrum, for the terminal, the PDCCH for transmitting the first channel occupancy indication is detected in a blind manner, and when the first channel occupancy indication is monitored, it may be determined that the base station has successfully camped on the channel on the unlicensed spectrum. As an example, the terminal may always perform blind detection on the PDCCH, or the terminal may also perform periodic detection on the PDCCH to monitor the first channel occupancy indication.
Further, the terminal may listen for the first channel occupancy indication in the low power mode, and at this time, a specific implementation of listening for the first channel occupancy indication indicating successful camping on a channel on the unlicensed spectrum may include any one of the following implementations:
the first implementation mode comprises the following steps: a first channel occupancy indication indicating successful preemption of a channel on an unlicensed spectrum is listened to using a low power receiver whose received power is less than a power threshold.
The power threshold may be set according to actual requirements, or may also be set by the terminal as a default, which is not limited in this embodiment of the present application.
That is, the terminal may listen and receive the first channel occupancy indication using a specific low power receiver, which typically has a relatively low receive power, so as to perform listening and receiving in a low power mode.
The second implementation mode comprises the following steps: and reducing the target receiving parameter, and monitoring a first channel occupation indication for indicating successful occupation of the channel on the unlicensed spectrum based on the reduced target receiving parameter.
The target receiving parameter may be selected according to actual requirements, or the target receiving parameter may be set by default by the terminal, or the target receiving parameter may be configured by the network.
That is, some receiving parameters are usually involved in the process of monitoring and receiving the first channel occupation indication, and some target receiving parameters may be selected, for example, the target receiving parameters may include, but are not limited to, the number of receiving antennas or MIMO (Multiple-Input Multiple-Output) order. Then, the target receiving parameter is reduced, and the first channel occupation indication is monitored and received based on the reduced target receiving parameter, so that monitoring and receiving in the low power mode are realized.
Step 202: and controlling the state of a Discontinuous Reception (DRX) timer according to a monitoring result of the first channel occupation indication, wherein the monitoring result comprises monitoring the first channel occupation indication or not monitoring the first channel occupation indication.
As an example, the DRX timer includes any one or more of a DRX on-duration timer, a DRX off-active timer, a DRX downlink retransmission timer, a DRX uplink retransmission timer, and a random access contention resolution timer.
The terminal controls the DRX timer to be in different states according to different results of monitoring the first channel occupation indication and not monitoring the first channel occupation indication, so that the terminal can be successfully scheduled by the base station under the condition that the base station successfully occupies the channel, and the time length of the timer configured for the terminal does not need to be configured longer, and the time length of the DRX period configured for the terminal does not need to be shortened for a certain time length.
In the embodiment of the present application, a first channel occupation indication is monitored, and the first channel occupation indication can be used to indicate whether to successfully occupy a channel on an unlicensed spectrum, so that the state of a DRX timer can be controlled according to a monitoring result of the first channel occupation indication, thereby ensuring that a terminal can be successfully scheduled within a channel occupation time. Therefore, the longer time of the timer does not need to be configured for the terminal, the time of the DRX period configured for the terminal does not need to be shortened for a certain time, and the power consumption of the terminal is reduced under the condition of ensuring that the success rate of discontinuous reception of the terminal can be increased.
Referring to fig. 3, fig. 3 is a flowchart illustrating a method for controlling a DRX timer according to another exemplary embodiment, where the method may be applied in the implementation environment illustrated in fig. 1 and is mainly performed by a terminal, and the method may include the following implementation steps:
step 301: monitoring a first channel occupancy indication indicating successful camping on a channel on the unlicensed spectrum.
The specific implementation of this method can be referred to step 201 in the embodiment shown in fig. 2, and details are not repeated here.
Step 302: and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is determined to meet the starting or restarting condition in a first time period, starting or restarting the DRX timer, wherein the first time period is a time period with the receiving time of the first channel occupation indication as the starting time and the maximum channel occupation time MCOT as the duration.
It should be noted that, here and hereinafter, the DRX timer satisfying the start or restart condition and the DRX timer not satisfying the start or restart condition are determined according to the currently existing DRX mechanism, and the specific determination process may refer to the above-mentioned introduction part of the start or restart condition for each timer.
As an example, whether the DRX timer satisfies a start or restart condition may be determined according to a DRX configuration parameter, which may be configured to the terminal by the base station, and which may be used to indicate when the DRX timer starts or restarts. Illustratively, the DRX configuration parameters may include a duration of a DRX cycle (including a long DRX cycle and a short DRX cycle), configuration information of each DRX timer (including, for example, a start or restart time of each DRX timer), a duration of each DRX timer, and the like, and may further include a start time configuration of the DRX duration timer, such as a subframe offset configuration of 0, a slot offset configuration of 0, and the like.
When the monitoring result comprises monitoring the first channel occupation indication, the base station is indicated to have successfully preempted the channel on the unlicensed spectrum, in this case, the terminal may control the DRX timer to start or restart only within the channel occupation time, for this purpose, a first time period with the first channel occupation indication as a starting time and the MCOT as a duration may be determined, and if the DRX timer satisfies a start or restart condition within the first time period, the DRX timer is started or restarted.
Wherein, the DRX timer meeting the start or restart condition in the first period of time may include two cases: one is that the DRX timer fulfils a start or restart condition at a time before the first time period, in which case the DRX timer can be started immediately upon receipt of the first channel occupancy indication; another case is that the DRX timer does not satisfy a start or restart condition before the first period of time until a certain moment in the first period of time, in which case the DRX timer is immediately started or restarted as long as it is determined that the DRX timer satisfies the start or restart condition during the first period of time.
Further, when the monitoring result includes monitoring the first channel occupation indication, if the DRX timer is a DRX duration timer, if it is determined that the DRX duration timer does not satisfy the start or restart condition within the first time period, if a second channel occupation indication is monitored again and the DRX duration timer satisfies the start or restart condition, when a time interval between a reception time of the second channel occupation indication and a time at which the DRX duration timer satisfies the start or restart condition is less than a time duration of the current DRX cycle, the DRX duration timer is started or restarted within a second time period, where the second time period is a time period in which a reception time of the second channel occupation indication is a start time and MCOT is a duration.
That is, for the DRX duration timer, if the DRX duration timer does not satisfy the start or restart condition within the channel occupancy time after receiving the first channel occupancy indication, the terminal does not start the DRX duration timer. And when the terminal monitors the second channel occupation indication next time, if the DRX duration timer meets the starting or restarting condition in the second time period, judging whether the time interval between the receiving time of the second channel occupation indication and the time when the DRX timer meets the starting or restarting condition is smaller than the duration of the current DRX cycle, if so, indicating that one DRX cycle is not exceeded from the time when the DRX timer meets the starting or restarting condition to the time when the second channel occupation indication is received, and starting or restarting the DRX duration timer in the second time period.
It should be noted that the condition that the DRX duration timer satisfies the start or restart condition during the second period of time includes two cases: one case is that the DRX duration timer satisfies a start or restart condition at some time after the first period of time and before the second period of time; another case is that the DRX duration timer does not satisfy the start or restart condition after the first time period and before the second time period until a certain time after the second time period is entered, the DRX duration timer does not satisfy the start or restart condition.
Further, when the monitoring result includes monitoring the first channel occupation indication, if the DRX timer is a DRX duration timer, if it is determined that the DRX duration timer does not satisfy the start or restart condition within the first time period, canceling the start or restart of the DRX duration timer in a DRX cycle in which the DRX duration timer satisfies the start or restart condition when the DRX duration timer does not receive the second channel occupation indication all the time in the DRX cycle after the DRX duration timer satisfies the start or restart condition.
That is, for the DRX duration timer, if the DRX duration timer is not started or restarted within the first time period, when it is detected that the DRX duration timer satisfies the start or restart condition, from the time when the condition is satisfied, if the second channel occupation indication is not received in a next DRX cycle, it indicates that the DRX duration timer cannot be started or restarted all the time in the current DRX cycle, and at this time, the start or restart of the DRX duration timer in the current DRX cycle is cancelled, and the next DRX cycle is entered.
Step 303: and when the monitoring result comprises that the first channel occupation indication is not monitored, if the DRX timer is determined to meet the starting or restarting condition, the DRX timer is not started or restarted.
If the monitoring result comprises that the first channel occupation indication is not monitored, the base station does not send the first channel occupation indication, so that the base station can be indicated to unsuccessfully seize the channel on the unlicensed spectrum.
Further, the DRX timer is controlled to operate in the channel occupation time and is controlled to be suspended in the non-channel occupation time.
That is, in the case of controlling the DRX timer to start or restart in the above-described manner, if it is within the first period, the DRX timer is controlled to operate, and at the end of the first period, the terminal suspends the DRX timer that is being operated, and resumes the operation of the DRX timer after the next time the channel occupancy period is entered, thus repeatedly controlling the DRX timer to operate and suspend the operation until the DRX timer times out within the channel occupancy period.
Further, the PDCCH is monitored during the DRX timer operation time, and the PDCCH except for the transmission channel occupation indication is not monitored during the DRX timer pause operation time.
That is, the terminal performs an operation of monitoring the PDCCH only when the DRX timer is operated, and monitors only the PDCCH for the transmission channel occupancy indication and does not monitor other PDCCHs if the DRX timer is not operated. Further, when DMRS is used as the channel occupancy indication, the terminal may monitor only the DMRS without monitoring the PDCCH during the DRX timer suspended operation time.
In the above implementation, the DRX timer is controlled to be started or restarted only during the occupied channel time and not started or not restarted during the non-occupied channel time, and the DRX timer is only operated during the occupied channel time and not operated during the non-occupied channel time, and further, the UE monitors the PDCCH when the DRX timer is operated and does not monitor the PDCCH except for the indication of the occupied transmission channel when the DRX timer is not operated. By adopting the mode, the DRX timer only considers the scheduling condition of the channel occupation time actually, and only monitors the PDCCH for transmitting the channel occupation indication if the channel occupation time is not scheduled, so that the scheduling condition of data can be accurately determined, the probability that the terminal can be scheduled successfully is increased, the power consumption of the terminal is reduced, and the scheduling performance and the power saving problem of the terminal are considered well. In addition, the actual running duration of the DRX timer may reflect the duration that the base station can schedule data for the terminal.
For ease of understanding, fig. 4 is taken as an example to illustrate a specific implementation of the scheme provided by the embodiment of fig. 3. Referring to fig. 4, the following processes are mainly included:
1. the terminal monitors the first channel occupation indication in a low-power mode to determine whether a downlink channel on the unlicensed spectrum is available according to a monitoring result of the first channel occupation indication. The solid line region in fig. 4 indicates that the downlink channel on the unlicensed spectrum is available during this time; the regions other than the solid line region indicate that the downlink channel on the unlicensed spectrum is not available for this time.
2. At the starting time of the first DRX period, the terminal does not start a DRX duration timer due to the fact that a downlink channel on an unlicensed spectrum is unavailable, and the terminal starts the DRX duration timer when the terminal receives a first channel occupation indication from a base station until the terminal meets the starting condition, and the DRX duration timer is operated within the channel occupation time. And when the channel occupation time is over, the terminal suspends the operation of the DRX continuous timer until the terminal receives a second channel occupation indication from the network next time, and the terminal resumes the operation of the DRX continuous timer, and repeatedly controls the operation and the suspension of the DRX continuous timer in this way until the DRX continuous timer is overtime in the channel occupation time.
3. During the operation period of the DRX continuous timer, after the terminal receives a PDCCH (physical Downlink control channel) indicating the scheduling of downlink initial transmission, the terminal starts the DRX inactive timer, the DRX inactive timer only operates within the channel occupation time, the terminal suspends the operation of the DRX inactive timer at the moment when the channel occupation time is finished each time, and the terminal resumes the operation of the DRX inactive timer until the DRX inactive timer is overtime within the channel occupation time until the terminal receives the channel occupation indication from the network next time.
4. And the terminal receives downlink data on the resources indicated by the PDCCH and decodes the received data, and if the decoding fails, the terminal starts a Timer DRX-HARQ-RTT-Timer after finishing NACK feedback aiming at the downlink transmission. Referring to fig. 4, after the DRX-HARQ-RTT-Timer expires, the terminal does not start the DRX downlink retransmission Timer because the downlink channel on the unlicensed spectrum is unavailable. And when the terminal receives the channel occupation indication from the network next time, the terminal starts the DRX downlink retransmission timer, the DRX downlink retransmission timer only runs in the channel occupation time, and the terminal stops running the DRX downlink retransmission timer at the time when the channel occupation time is finished each time until the terminal receives the channel occupation indication again, and resumes running the DRX downlink retransmission timer until the DRX downlink retransmission timer is overtime in the channel occupation time.
It should be noted that, here, the description is only given by taking an example that the terminal receives downlink data on the resource indicated by the PDCCH, and when the terminal transmits uplink data on the resource indicated by the PDCCH, the control of the DRX uplink retransmission timer is the same as the control of the DRX downlink retransmission timer, and the description is not given here.
5. Referring to fig. 4, at the beginning of the second DRX cycle, a downlink channel on the unlicensed spectrum is available, if the DRX duration timer satisfies a restart condition, the terminal restarts the DRX duration timer, and the DRX duration timer is operated only during the duration of the channel occupancy, and at the end of each duration of the channel occupancy, the terminal suspends the DRX duration timer until the terminal next receives a channel occupancy indication from the network, and the terminal resumes operating the DRX duration timer until the DRX duration timer expires during the duration of the channel occupancy.
According to the above implementation manner, the states of other DRX timers can be continuously controlled in the second DRX cycle or more DRX cycles, which is not repeated herein.
Referring to fig. 5, fig. 5 is a flowchart illustrating a method for controlling a DRX timer according to another exemplary embodiment, where the method may be applied in the implementation environment illustrated in fig. 1 and is mainly performed by a terminal, and the method may include the following implementation steps:
step 501: monitoring a first channel occupancy indication indicating successful preemption of a channel on an unlicensed spectrum.
The specific implementation of this embodiment may refer to step 201 in the embodiment shown in fig. 2, and details are not repeated here.
It should be noted that, here, the terminal may determine the starting or restarting time of each DRX timer according to the current DRX mechanism, that is, the starting or restarting time of the DRX timer may be outside the channel occupying time or within the channel occupying time. Of course, for the DRX inactivity timer, the start or restart occasion must be within the channel occupancy time.
In this embodiment, the operation state of the DRX timer may be controlled according to the monitoring result indicated by the first channel occupation indication, and the specific implementation may include the following steps 502 and 503 according to different monitoring results.
Step 502: and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is in an operating state within a first time period, suspending operating the DRX timer, wherein the first time period is the time period with the receiving time of the first channel occupation indication as a starting time and the maximum channel occupation time MCOT as a duration.
When the monitoring result comprises monitoring the first channel occupation indication, the base station is indicated to have successfully preempted the channel on the unlicensed spectrum, if the DRX timer is in an operation state, the operation of the DRX timer is suspended, that is, the DRX timer is suspended at the moment when the first channel occupation indication is received, so that the DRX timer is suspended in the channel occupation time.
Step 503: and when the monitoring result comprises that the first channel occupation indication is not monitored, if the DRX timer is in a suspended running state, the running of the DRX timer is resumed.
When the monitoring result comprises that the first channel occupation indication is not monitored, the base station does not successfully occupy the channel on the unlicensed spectrum, if the DRX timer is in a suspended running state, the DRX timer is controlled to continue running, that is to say, the running of the DRX timer is resumed at the moment when the channel occupation time is over, so that the DRX timer runs in the non-channel occupation time.
Further, the PDCCH is monitored during the DRX timer pause operation time, and the PDCCH except for the transmission channel occupation indication is not monitored during the DRX timer operation time.
Since the DRX timer is suspended for the duration of the channel occupancy time and resumes during the duration of the non-channel occupancy time, the terminal monitors the PDCCH during the duration of the DRX timer, and not monitoring the PDCCHs other than the indication of the channel occupancy for transmission means monitoring the PDCCH during the duration of the channel occupancy time and not monitoring the PDCCHs other than the indication of the channel occupancy for transmission during the non-channel occupancy time. Further, when DMRS is used as the channel occupancy indication, the terminal may monitor only the DMRS without monitoring the PDCCH during the DRX timer operation time.
Therefore, the terminal can monitor the scheduling information all the time when the base station occupies the channel, and the terminal cannot return to the sleep state when the base station occupies the channel, so that the terminal can be successfully scheduled by the base station, and the power consumption of the terminal is saved.
For ease of understanding, fig. 6 is taken as an example to illustrate a specific implementation of the scheme provided by the embodiment of fig. 5. Referring to fig. 6, the following processes are mainly included:
1. the terminal monitors the first channel occupation indication in a low power mode, and determines whether a downlink channel on the unlicensed spectrum is available according to a monitoring result of the first channel occupation indication. As shown in fig. 6, the solid line region in the figure indicates that the downlink channel on the unlicensed spectrum is available during the period of time, and the region other than the solid line region indicates that the downlink channel on the unlicensed spectrum is not available during the period of time.
2. At the starting time of the first DRX period, the terminal starts and runs the DRX duration timer on the assumption that the DRX duration timer meets the starting condition because a downlink channel on an unlicensed spectrum is unavailable. When the terminal receives a first channel occupation indication from the network, the terminal suspends the DRX duration timer until the end time of the channel occupation time, the terminal resumes the DRX duration timer, and suspends the DRX duration timer when receiving a second channel occupation indication again, and the operation and the suspension of the DRX duration timer are repeatedly controlled in such a way until the DRX duration timer is overtime in the non-channel occupation time.
3. During the operation of the DRX continuous timer, after the terminal receives a PDCCH (physical Downlink control channel) indicating the scheduling of downlink initial transmission, the DRX inactive timer is started, and because the UE starts the DRX inactive timer at the moment, a downlink channel on the unlicensed spectrum is available, the UE immediately suspends the operation of the DRX inactive timer after starting until the moment when the channel occupation time is finished, and the UE resumes the operation of the DRX inactive timer. And the terminal suspends the operation of the DRX inactive timer at the time of receiving the channel occupation indication from the network next time. And the DRX inactivity timer is resumed to run until the end time of the channel occupation time till the DRX inactivity timer is overtime in the non-channel occupation time.
4. And the terminal receives downlink data on the resources indicated by the PDCCH and decodes the received data, and if the decoding fails, the terminal starts a timer drx-HARQ-RTT-TimerDL after finishing NACK feedback aiming at the downlink transmission. And after the DRX-HARQ-RTT-TimerDL is overtime, the terminal starts a DRX downlink retransmission timer, and the retransmission timer only runs in the non-channel occupation time. And at the moment that the terminal receives a channel occupation indication from the network each time, the terminal suspends the operation of the DRX downlink retransmission timer, and the terminal resumes the operation of the DRX downlink retransmission timer until the DRX downlink retransmission timer is overtime in the non-channel occupation time.
It should be noted that, here, the description is only given by taking an example that the terminal receives downlink data on the resource indicated by the PDCCH, and when the terminal transmits uplink data on the resource indicated by the PDCCH, the control of the DRX uplink retransmission timer is the same as the control of the DRX downlink retransmission timer, and the description is not given here.
5. At the start time of the second DRX cycle, the terminal restarts the DRX duration timer, and the DRX duration timer is operated only for the non-channel occupying time. Referring to fig. 6, since the downlink channel on the unlicensed spectrum is available at the moment when the UE starts the DRX duration timer, the terminal suspends the DRX duration timer immediately after starting the DRX duration timer until the moment when the channel occupying time ends, and the terminal resumes running the DRX duration timer. And when the terminal receives the channel occupation indication from the network next time, the DRX duration timer is suspended again. And the terminal resumes running the DRX continuous timer until the end time of the channel occupation time till the DRX continuous timer is overtime in the non-channel occupation time.
According to the above implementation manner, the states of other DRX timers may be controlled in the second DRX cycle or in more DRX cycles, which is not repeated herein.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a control apparatus for a DRX timer according to an exemplary embodiment, where the control apparatus may include the following modules:
a monitoring module 710, configured to monitor a first channel occupation indication indicating successful occupation of a channel on an unlicensed spectrum;
a control module 720, configured to control a state of a DRX timer according to a monitoring result of the first channel occupation indication, where the monitoring result includes monitoring the first channel occupation indication or not monitoring the first channel occupation indication.
In one possible implementation manner of the present application, the control module 720 is configured to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is determined to meet the starting or restarting condition in a first time period, starting or restarting the DRX timer, wherein the first time period is a time period with the receiving time of the first channel occupation indication as the starting time and the maximum channel occupation time MCOT as the duration.
In one possible implementation manner of the present application, the control module 720 is configured to:
and when the monitoring result comprises that the first channel occupation indication is not monitored, if the DRX timer is determined to meet the starting or restarting condition, the DRX timer is not started or restarted.
In one possible implementation manner of the present application, the control module 720 is configured to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is a DRX continuous timer, if the DRX continuous timer is determined not to meet the starting or restarting condition in a first time period, if a second channel occupation indication is monitored again and the DRX continuous timer meets the starting or restarting condition, when the time interval between the receiving time of the second channel occupation indication and the time when the DRX continuous timer meets the starting or restarting condition is less than the time duration of the current DRX cycle, starting or restarting the DRX continuous timer in a second time period, wherein the second time period is a time period with the receiving time of the second channel occupation indication as the starting time and MCOT as the continuous time duration.
In one possible implementation manner of the present application, the control module 720 is configured to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is a DRX duration timer, if the DRX duration timer is determined not to meet the starting or restarting condition in a first time period, and when a second channel occupation indication is not received in one DRX period after the DRX duration timer meets the starting or restarting condition, cancelling the starting or restarting of the DRX duration timer in the DRX period when the DRX duration timer meets the starting or restarting condition.
In one possible implementation manner of the present application, the control module 720 is further configured to:
and controlling the DRX timer to operate in the channel occupation time and to suspend operation in the non-channel occupation time.
In one possible implementation manner of the present application, the control module 720 is further configured to:
and monitoring the PDCCH during the operation time of the DRX timer, and not monitoring the PDCCH except for the transmission channel occupation indication during the operation time of the DRX timer.
In one possible implementation manner of the present application, the control module 720 is configured to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is in an operation state in a first time period, suspending the operation of the DRX timer, wherein the first time period is the time period with the receiving time of the first channel occupation indication as the starting time and the maximum channel occupation time MCOT as the duration.
In one possible implementation manner of the present application, the control module 720 is configured to:
and when the monitoring result comprises that the first channel occupation indication is not monitored, if the DRX timer is in a suspended running state, the running of the DRX timer is resumed.
In one possible implementation manner of the present application, the control module 720 is further configured to:
and monitoring the PDCCH during the pause running time of the DRX timer, and not monitoring the PDCCH except for the transmission channel occupation indication during the running time of the DRX timer.
In a possible implementation manner of the present application, the first channel occupation indication is a demodulation reference signal DMRS, or the first channel occupation indication is a signal transmitted on a PDCCH.
In one possible implementation manner of the present application, the listening module 710 is configured to:
monitoring, using a low power receiver, a first channel occupancy indication indicating successful preemption of a channel on an unlicensed spectrum, a receive power of the low power receiver being less than a power threshold; alternatively, the first and second electrodes may be,
and reducing the target receiving parameter, and monitoring a first channel occupation indication for indicating successful occupation of the channel on the unlicensed spectrum based on the reduced target receiving parameter.
In one possible implementation manner of the present application, the DRX timer includes any one or more of a DRX duration timer, a DRX inactivity timer, a DRX downlink retransmission timer, a DRX uplink retransmission timer, and a random access contention resolution timer.
In the embodiment of the present application, a first channel occupation indication is monitored, and the first channel occupation indication can be used to indicate whether to successfully occupy a channel on an unlicensed spectrum, so that the state of a DRX timer can be controlled according to a monitoring result of the first channel occupation indication, thereby ensuring that a terminal can be successfully scheduled within a channel occupation time. Therefore, the longer time of the timer does not need to be configured for the terminal, the time of the DRX period configured for the terminal does not need to be shortened for a certain time, and the power consumption of the terminal is reduced under the condition of ensuring that the success rate of discontinuous reception of the terminal can be increased.
Please refer to fig. 8, which shows a schematic structural diagram of a terminal according to an exemplary embodiment of the present application, including: a processor 801, a receiver 802, a transmitter 803, a memory 804 and a bus 805.
The processor 801 includes one or more processing cores, and the processor 801 executes various functional applications and information processing by running software programs and modules.
The receiver 802 and the transmitter 803 may be implemented as one communication component, which may be a piece of communication chip.
The memory 804 is coupled to the processor 801 by a bus 805.
The memory 804 may be configured to store at least one instruction, which the processor 8101 is configured to execute to implement the various steps performed by the terminal in the various method embodiments described above.
Further, the memory 804 may be implemented by any type or combination of volatile or non-volatile storage devices, including, but not limited to: magnetic or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), Static Random Access Memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM).
The present application provides a computer-readable storage medium, in which at least one instruction is stored, and the at least one instruction is loaded and executed by the processor to implement the method provided by the above-mentioned method embodiments.
The present application also provides a computer program product, which when run on a computer causes the computer to perform the methods provided by the various method embodiments described above.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (26)

1. A DRX timer control method, the method comprising:
monitoring a first channel occupation indication for indicating successful occupation of a channel on an unlicensed spectrum;
controlling a state of a Discontinuous Reception (DRX) timer according to a monitoring result of the first channel occupation indication, wherein the monitoring result comprises monitoring the first channel occupation indication or not monitoring the first channel occupation indication,
wherein, when the monitoring result includes monitoring the first channel occupation indication, if the DRX timer is a DRX continuous timer, the controlling the state of the DRX timer according to the monitoring result of the first channel occupation indication includes:
if the DRX continuous timer does not meet the starting or restarting condition within the first time period, if a second channel occupation indication is monitored again and the DRX continuous timer meets the starting or restarting condition, when the time interval between the receiving time of the second channel occupation indication and the time when the DRX continuous timer meets the starting or restarting condition is less than the duration of the current DRX cycle, the DRX continuous timer is started or restarted within a second time period, wherein the second time period is the time period with the receiving time of the second channel occupation indication as the starting time and MCOT as the duration.
2. The method of claim 1, wherein when the monitoring result comprises monitoring the first channel occupancy indication, the controlling the state of a Discontinuous Reception (DRX) timer according to the monitoring result for the first channel occupancy indication comprises:
and if the DRX timer meets the starting or restarting condition within a first time period, starting or restarting the DRX timer, wherein the first time period is a time period taking the receiving time of the first channel occupation indication as an initial time and the maximum channel occupation time MCOT as a duration.
3. The method of claim 1, wherein when the listening result comprises that the first channel occupancy indication is not listened to, the controlling the state of a Discontinuous Reception (DRX) timer according to the listening result for the first channel occupancy indication comprises:
and if the DRX timer is determined to meet the starting or restarting condition, not starting or not restarting the DRX timer.
4. The method of claim 1, wherein when the listening result comprises listening to the first channel occupancy indication, if the DRX timer is a DRX on-duration timer, the controlling the state of a Discontinuous Reception (DRX) timer according to the listening result to the first channel occupancy indication comprises:
if the DRX duration timer does not meet the starting or restarting condition within the first time period, canceling the starting or restarting of the DRX duration timer within the DRX period when the DRX duration timer meets the starting or restarting condition when a second channel occupation indication is not received in one DRX period after the DRX duration timer meets the starting or restarting condition.
5. The method of claim 1 or 2, wherein the method further comprises:
and controlling the DRX timer to operate in the channel occupation time and to suspend operation in the non-channel occupation time.
6. The method of claim 5, wherein the method further comprises:
and monitoring the PDCCH during the operation time of the DRX timer, and not monitoring the PDCCH except for the transmission channel occupation indication during the operation time of the DRX timer.
7. The method of claim 1, wherein when the listening result comprises monitoring the first channel occupancy indication, the controlling the state of a Discontinuous Reception (DRX) timer according to the listening result for the first channel occupancy indication comprises:
and if the DRX timer is in an operation state within a first time period, suspending the operation of the DRX timer, wherein the first time period is a time period with the receiving time of the first channel occupation indication as a starting time and the maximum channel occupation time MCOT as a duration.
8. The method of claim 1, wherein when the listening result comprises that the first channel occupancy indication is not listened to, the controlling the state of a Discontinuous Reception (DRX) timer according to the listening result for the first channel occupancy indication comprises:
and if the DRX timer is in the suspended running state, the running of the DRX timer is resumed.
9. The method of claim 7 or 8, wherein the method further comprises:
and monitoring the PDCCH during the pause running time of the DRX timer, and not monitoring the PDCCH except for the transmission channel occupation indication during the running time of the DRX timer.
10. The method of claim 1, wherein the first channel occupancy indication is a demodulation reference signal (DMRS) or the first channel occupancy indication is a signal transmitted on a PDCCH.
11. The method of claim 1, wherein the listening for a first channel occupancy indication indicating successful preemption of a channel on an unlicensed spectrum comprises:
monitoring, using a low power receiver, a first channel occupancy indication indicating successful preemption of a channel on an unlicensed spectrum, a receive power of the low power receiver being less than a power threshold; alternatively, the first and second electrodes may be,
and reducing the target receiving parameters, and monitoring a first channel occupation indication for indicating that the channel on the unlicensed spectrum is successfully occupied based on the reduced target receiving parameters.
12. The method of any of claims 1-4, 6-8, and 10-11, wherein the DRX timer comprises any one or more of a DRX duration timer, a DRX inactivity timer, a DRX downlink retransmission timer, a DRX uplink retransmission timer, and a random access contention resolution timer.
13. An apparatus for DRX timer control, the apparatus comprising:
the monitoring module is used for monitoring a first channel occupation indication for indicating successful occupation of a channel on the unlicensed spectrum;
a control module, configured to control a state of a Discontinuous Reception (DRX) timer according to a monitoring result of the first channel occupancy indication, where the monitoring result includes monitoring the first channel occupancy indication or not monitoring the first channel occupancy indication,
wherein the control module is configured to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is a DRX continuous timer, if the DRX continuous timer is determined not to meet the starting or restarting condition in a first time period, if a second channel occupation indication is monitored again and the DRX continuous timer meets the starting or restarting condition, when the time interval between the receiving time of the second channel occupation indication and the time when the DRX continuous timer meets the starting or restarting condition is less than the time duration of the current DRX cycle, starting or restarting the DRX continuous timer in a second time period, wherein the second time period is a time period with the receiving time of the second channel occupation indication as the starting time and MCOT as the continuous time duration.
14. The apparatus of claim 13, wherein the control module is to:
and when the monitoring result comprises that the first channel occupation indication is monitored, if the DRX timer is determined to meet the starting or restarting condition in a first time period, starting or restarting the DRX timer, wherein the first time period is a time period taking the receiving time of the first channel occupation indication as the starting time and the maximum channel occupation time MCOT as the duration.
15. The apparatus of claim 13, wherein the control module is to:
and when the monitoring result comprises that the first channel occupation indication is not monitored, if the DRX timer is determined to meet the starting or restarting condition, the DRX timer is not started or restarted.
16. The apparatus of claim 13, wherein the control module is to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is a DRX duration timer, if the DRX duration timer is determined not to meet the starting or restarting condition in a first time period, and when a second channel occupation indication is not received in one DRX period after the DRX duration timer meets the starting or restarting condition, cancelling the starting or restarting of the DRX duration timer in the DRX period when the DRX duration timer meets the starting or restarting condition.
17. The apparatus of claim 13 or 14, wherein the control module is further to:
and controlling the DRX timer to operate in the channel occupation time and to suspend operation in the non-channel occupation time.
18. The apparatus of claim 17, wherein the control module is further to:
and monitoring the PDCCH during the operation time of the DRX timer, and not monitoring the PDCCH except for the transmission channel occupation indication during the operation time of the DRX timer.
19. The apparatus of claim 13, wherein the control module is to:
and when the monitoring result comprises monitoring the first channel occupation indication, if the DRX timer is in an operation state in a first time period, suspending the operation of the DRX timer, wherein the first time period is the time period with the receiving time of the first channel occupation indication as the starting time and the maximum channel occupation time MCOT as the duration.
20. The apparatus of claim 13, wherein the control module is to:
and when the monitoring result comprises that the first channel occupation indication is not monitored, if the DRX timer is in a suspended running state, the running of the DRX timer is resumed.
21. The apparatus of claim 19 or 20, wherein the control module is further configured to:
and monitoring the PDCCH during the pause running time of the DRX timer, and not monitoring the PDCCH except for the transmission channel occupation indication during the running time of the DRX timer.
22. The apparatus of claim 13, wherein the first channel occupancy indication is a demodulation reference signal (DMRS) or the first channel occupancy indication is a signal transmitted on a PDCCH.
23. The apparatus of claim 13, wherein the listening module is to:
monitoring, using a low power receiver, a first channel occupancy indication indicating successful preemption of a channel on an unlicensed spectrum, a receive power of the low power receiver being less than a power threshold; alternatively, the first and second electrodes may be,
and reducing the target receiving parameter, and monitoring a first channel occupation indication for indicating successful occupation of the channel on the unlicensed spectrum based on the reduced target receiving parameter.
24. The apparatus of any of claims 13-16, 18-20, and 22-23, wherein the DRX timer comprises any one or more of a DRX on-duration timer, a DRX off-active timer, a DRX downlink retransmission timer, a DRX uplink retransmission timer, and a random access contention resolution timer.
25. A terminal, characterized in that the terminal comprises a processor and a memory, the memory storing at least one instruction for execution by the processor to implement the method of any one of claims 1-12.
26. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any of claims 1-12.
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