CN112312424B

CN112312424B - PDCCH monitoring method, base station and terminal

Info

Publication number: CN112312424B
Application number: CN201910696507.8A
Authority: CN
Inventors: 罗晨; 王加庆; 杨美英; 赵铮
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2022-04-22
Anticipated expiration: 2039-07-30
Also published as: CN112312424A

Abstract

The embodiment of the invention provides a PDCCH monitoring method, a base station and a terminal, wherein the PDCCH monitoring method comprises the following steps: when detecting that the terminal enters a power saving state, the base station sends a power saving signal carrying first power saving indication information to the terminal; acquiring DCI to be sent to a terminal, and changing original indication information of a preset field in the DCI into target indication information, wherein the target indication information is used for indicating a PDCCH monitoring period; and transmitting the DCI to the terminal. The embodiment of the invention enables the terminal to monitor the PDCCH according to the target indication information in the DCI, thereby realizing flexible monitoring of the PDCCH.

Description

PDCCH monitoring method, base station and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a PDCCH monitoring method, a base station, and a terminal.

Background

In an existing Physical Downlink Control Channel (PDCCH) monitoring mechanism, a base station allocates one or more periodic search spaces to a user through a system message, the user performs PDCCH detection in the configured search spaces, and a time when the user performs PDCCH detection each time is called a PDCCH monitoring opportunity (PDCCH monitoring interference).

In addition, when the terminal configures a Discontinuous Reception (DRX) mechanism, the terminal monitors the PDCCH discontinuously, that is, the terminal monitors the PDCCH only when a DRX active period (DRX on duration) or a non-active timer (Inactivity timer) in a DRX cycle is not expired, and the terminal does not receive other PDCCHs except for a scheduling broadcast signaling in a time other than the DRX active period to reduce power consumption, that is, enters a sleep mode.

However, although the DRX mechanism is introduced to enable the terminal to perform PDCCH monitoring only during the DRX active period or when the inactivity timer is not overtime, power is saved for the terminal to a certain extent, for the case that the DRX mechanism is not configured or the DRX active period or the inactivity timer is not overtime, if there is no data scheduling, each PDCCH monitoring opportunity still performs PDCCH monitoring, that is, the above-mentioned PDCCH monitoring mechanism has poor flexibility and is still an inefficient power saving manner. In addition, although the PDCCH monitoring period can be modified through high-level signaling, the semi-static configuration method cannot perform dynamic change according to the service transmission of the user, which also results in that the terminal has no flexibility in performing PDCCH monitoring.

Disclosure of Invention

The embodiment of the invention provides a PDCCH monitoring method, a base station and a terminal, so that the terminal can carry out a flexible PDCCH monitoring process.

In a first aspect, an embodiment of the present invention provides a PDCCH monitoring method, where the PDCCH monitoring method includes:

when a base station detects that a terminal meets a preset condition of entering a power saving state, a power saving signal is sent to the terminal, wherein the power saving signal carries first power saving indication information;

acquiring DCI to be sent to the terminal, and changing original indication information of a preset field in the DCI into target indication information, wherein the target indication information is used for indicating a PDCCH monitoring period;

and sending the DCI to the terminal.

In a second aspect, an embodiment of the present invention provides a PDCCH monitoring method, where the PDCCH monitoring method includes:

receiving a power saving signal sent by a base station, wherein the power saving signal carries first power saving indication information;

determining a preset field in the subsequent received downlink control information DCI to be used for indicating a physical downlink control channel PDCCH monitoring period according to the first power saving indication information;

receiving DCI sent by a base station, and performing PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, wherein the target indication information is used for indicating a PDCCH monitoring period.

In a third aspect, an embodiment of the present invention provides a PDCCH monitoring apparatus, where the PDCCH monitoring apparatus includes:

the base station comprises a first sending module, a second sending module and a power saving module, wherein the first sending module is used for sending a power saving signal to the terminal when the base station detects that the terminal meets the preset condition of entering a power saving state, and the power saving signal carries first power saving indication information;

a changing module, configured to acquire DCI to be sent to the terminal, and change original indication information of a preset field in the DCI into target indication information, where the target indication information is used to indicate a PDCCH monitoring period;

and the second sending module is used for sending the DCI to the terminal.

In a fourth aspect, an embodiment of the present invention provides a PDCCH monitoring apparatus, where the PDCCH monitoring apparatus includes:

the first receiving module is used for receiving a power saving signal sent by a base station, wherein the power saving signal carries first power saving indication information;

a determining module, configured to determine, according to the first power saving indication information, that a preset field in a subsequently received downlink control information DCI is used to indicate a PDCCH monitoring period;

and the second receiving module is used for receiving the DCI sent by the base station and carrying out PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, wherein the target indication information is used for indicating a PDCCH monitoring period.

In a fifth aspect, an embodiment of the present invention provides a base station, including a memory, a processor, and a program stored in the memory and executable on the processor, where the processor implements the steps of the PDCCH monitoring method according to the first aspect when executing the program.

In a sixth aspect, an embodiment of the present invention provides a terminal, including a memory, a processor, and a program stored in the memory and executable on the processor, where the processor implements the steps of the PDCCH monitoring method according to the second aspect when executing the program.

In a seventh aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the PDCCH monitoring method.

According to the PDCCH monitoring method, the base station and the terminal provided by the embodiment of the invention, the power saving state of the terminal is indicated through the power saving signal, and then the PDCCH monitoring period is indicated through the preset field in the DCI, so that after the terminal receives the power saving signal, the preset field in the DCI received after the power saving signal can be determined according to the first power saving indication information to indicate the PDCCH monitoring period, and further the subsequent PDCCH monitoring behavior is carried out according to the target indication information corresponding to the preset field in the DCI, thereby realizing the PDCCH monitoring process by combining the power saving signal and the DCI, and realizing the flexible monitoring of the PDCCH and the effective power saving of the terminal based on the fact that the PDCCH monitoring period can be indicated through the target indication information.

Drawings

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

FIG. 1 is a flowchart illustrating a PDCCH monitoring method according to an embodiment of the present invention;

FIG. 2 is a second flowchart illustrating a PDCCH monitoring method according to an embodiment of the present invention;

FIG. 3 is a block diagram of a PDCCH monitoring apparatus according to an embodiment of the present invention;

FIG. 4 is a second block diagram of a PDCCH monitoring apparatus according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a base station or a terminal in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.

In the prior art, the PDCCH monitoring can be performed through a DRX mechanism, but although this monitoring method can save power for the terminal to a certain extent, the monitoring flexibility is poor, and the method is still an inefficient power saving method. In addition, at present, although the PDCCH monitoring period can be changed through a high-level signaling, the semi-static configuration mode cannot be dynamically changed according to the service transmission of the user, which also causes that the terminal has no flexibility when performing PDCCH monitoring.

In addition, in the prior art, in a 5G New Radio (NR), a Downlink Control Information (DCI) format (format) includes a DCI format 0_1 for uplink and a DCI format 1_1 for Downlink scheduling. Among fields of the DCI format 0_1 and DCI format 1_1 information fields, a Bandwidth Part indicator (Bandwidth Part indicator) field is used for a terminal to perform Bandwidth Part (BWP) switching and indicates activation of BWP. When the DCI format 0_1 or DCI format 1_1 received by the terminal has a Bandwidth part indicator field, the terminal switches to the active BWP indicated by the DCI.

For the problem of poor PDCCH monitoring flexibility, the present embodiment may indicate PDCCH monitoring through the existing DCI, so as to implement a flexible PDCCH monitoring process. The present invention will be described in detail below.

As shown in fig. 1, which is one of the flow charts of the steps of the PDCCH monitoring method in the embodiment of the present invention, the PDCCH monitoring method includes the following steps:

step 101: and when the base station detects that the terminal meets the preset condition of entering the power saving state, transmitting a power saving signal to the terminal.

In this step, specifically, when the base station detects that the terminal satisfies the preset condition for entering the power saving state, it may be determined that the terminal satisfies the preset condition for entering the power saving state when the base station detects that the data service of the terminal is a burst service or detects that the requirement for the time delay of the terminal is lower than a preset time delay threshold.

In addition, specifically, when the base station detects that the terminal meets the preset condition of entering the power saving state, the power saving signal sent to the terminal carries the first power saving indication information, so that the terminal can determine, according to the first power saving indication information, that a preset field in DCI received by the terminal subsequently is used for indicating a PDCCH monitoring period.

Of course, the terminal enters the power saving state when receiving the power saving signal, that is, a preset field in DCI received after the terminal determines the power saving signal may be used to indicate a PDCCH monitoring period as a function indication of the power saving state.

In this way, by sending the power saving signal carrying the first power saving indication information to the terminal, the terminal can know that the indication meaning is changed by the preset field in the DCI received after the power saving signal according to the first power saving indication information, so that the terminal can monitor the PDCCH according to the DCI with the changed indication meaning.

Step 102: and acquiring DCI to be sent to a terminal, and changing original indication information of a preset field in the DCI into target indication information.

In this step, specifically, when the base station acquires the DCI to be sent to the terminal, the original indication information of the preset field in the DCI may be changed to the target indication information.

Specifically, the target indication information is used to indicate a PDCCH monitoring period.

In addition, specifically, the format of the DCI acquired by the base station is a preset format. It is understood that the preset format may be a format 0_1 or a format 1_ 1.

In addition, the preset field may be a Bandwidth part indication field (Bandwidth part indicator) in the DCI. Wherein, the original indication information of the bandwidth part indication field is used for indicating the switching of the bandwidth part, and the modified target indication information indicates the PDCCH monitoring period. Namely, the meaning of the existing bandwidth indication field in the DCI is changed, so that the PDCCH monitoring period can be indicated through the DCI, and the terminal can perform a flexible PDCCH monitoring process through the bandwidth part indication field in the DCI.

Step 103: and transmitting the DCI to the terminal.

In this step, specifically, the base station sends the DCI modified by the indication information of the preset field in step 102 to the terminal, so that the terminal can monitor the PDCCH according to the target indication information corresponding to the preset field in the DCI.

In this way, in this embodiment, a power saving signal carrying first power saving indication information is first sent to a terminal, then original indication information of a preset field in DCI to be sent to the terminal is changed into target indication information, the target indication information is used for indicating a PDCCH monitoring period, and finally DCI is sent to the terminal, so that after the terminal receives the power saving signal, the terminal can determine a preset field in subsequently received DCI according to the first power saving indication information to indicate the PDCCH monitoring period, and then perform subsequent PDCCH monitoring behavior according to target indication information corresponding to the preset field in the DCI, thereby implementing a PDCCH monitoring process by combining the power saving signal and the DCI, and based on the fact that the PDCCH monitoring period can be indicated by the target indication information, thereby implementing flexible monitoring of PDCCH, and implementing effective power saving of the terminal.

Here, the power saving signal will be specifically described.

In this embodiment, the power saving signal may be a dedicated signal pre-configured in a physical layer or a Medium Access Control (MAC) layer, or a dedicated signal pre-configured to be carried by a higher layer signaling, or power saving indication information pre-added to the DCI.

It should be noted that the power saving signal may also be power saving indication information added in a physical layer preset signal or a MAC layer preset signal.

Of course, when the power saving signal is a dedicated signal and is transmitted during a time other than the terminal DRX active period, the base station may periodically transmit the power saving signal or non-periodically transmit the power saving signal. Wherein the power saving signal may be transmitted at a preset offset before the DRX active period when the base station periodically or non-periodically transmits the power saving signal.

In addition, it should be noted that the power saving signal may be explicit indication information, for example, displayed by 1 bit, and when the bit value of the power saving signal is 1, it indicates that the power saving signal carries the first power saving indication information; the power saving signal may also be invisible indication information, for example, whether the power saving signal is a non-null value is displayed, and when the power saving signal is a non-null value, it indicates that the first power saving indication information is carried in the power saving signal.

In addition, the power saving signal may further carry BWP indication information, so that the terminal determines, according to the BWP indication information, whether the currently activated BWP matches the target BWP indicated by the BWP indication information, and if not, switches the BWP to the target BWP.

Of course, when the currently activated BWP coincides with the target BWP indicated by the BWP indication information, no handover is required.

Specifically, after the bandwidth part indication field in the DCI has been changed from the BWP handover information indicated by the original indication information to the PDCCH monitoring period indicated by the target indication information, the BWP handover procedure needs to be indicated again by another signal. At this time, the handover procedure of BWP may be indicated by the power-saving signal to ensure a normal handover procedure of BWP when the terminal indicates the PDCCH listening period in the bandwidth part indication field in the DCI.

Furthermore, further, when the original indication information of a preset field in the DCI is changed into target indication information, the target indication information indicates that the PDCCH monitoring period is not changed or is changed; or, the target indication information indicates a value of a default PDCCH monitoring period or a value of a modified PDCCH monitoring period.

The following describes the indication of the target indication information by a specific example.

Specifically, when it is detected that the terminal is in the data packet transmission process, the target indication information may indicate that the PDCCH monitoring period is not changed, or indicate a default PDCCH monitoring period, that is, the next PDCCH monitoring period is monitored;

when detecting that the data packet transmission is finished, the target indication information may indicate to change the PDCCH monitoring period or indicate a value of the changed PDCCH monitoring period.

Specifically, when the terminal is in the data packet transmission process, in order to ensure normal PDCCH monitoring of the terminal, the target indication information indicates that the PDCCH monitoring period is not changed or indicates a default PDCCH monitoring period; when the transmission of the last data packet is finished, that is, when the transmission of the data packet is finished, in order to save the electric quantity, the target indication information may indicate to change the PDCCH monitoring period or indicate the value of the changed PDCCH monitoring period, where the value of the changed PDCCH monitoring period is greater than the value of the PDCCH monitoring period before the change, so as to implement the PDCCH monitoring skipping process and implement the electric quantity saving.

Or, when the data service data packet of the terminal is smaller and the delay requirement is insensitive, the target indication information may indicate to change the PDCCH monitoring period or indicate a value of the changed PDCCH monitoring period, where the value of the changed PDCCH monitoring period is greater than the value of the PDCCH monitoring period before the change. Of course, if the default PDCCH monitoring period or the modified PDCCH monitoring period has performance impact on the current data transmission of the user, the modification of the PDCCH monitoring period may be indicated by the target indication information, where the modified PDCCH monitoring period is smaller than the PDCCH monitoring period before modification; or indicate a default PDCCH monitoring period. In addition, if the modified PDCCH monitoring period does not affect the performance of the data transmission of the current user, when the transmission of the last data packet, that is, the data packet, is finished, the target indication information may indicate to maintain the modified PDCCH monitoring period or indicate to modify the PDCCH monitoring period with a larger value.

Of course, it should be noted here that the above example is only one case when the target indication information indicates, and the content indicated by the target indication information may be indicated according to the actual situation of the terminal, and is not limited to the above one indication case.

In addition, a setting process of the target indication information is explained here.

The length of the preset field in the DCI may be a first bit or a second bit; wherein the content of the first and second substances,

when the length of the preset field is a first bit, the target indication information corresponding to the preset field indicates whether to change the PDCCH monitoring period, wherein when the PDCCH monitoring period is indicated to be changed, the changed PDCCH monitoring period is preconfigured by a high-level signaling;

when the length of the preset field is a second bit, the target indication information corresponding to the preset field is a value indicating the PDCCH monitoring period or an index value of the PDCCH monitoring period in a PDCCH monitoring period set, wherein the PDCCH monitoring period set is preconfigured by a high-level signaling.

Specifically, the first bit may be 1 bit, and at this time, a "0" may be used to indicate that the PDCCH monitoring period is not changed, that is, a default PDCCH monitoring period is used, and a "1" may be used to indicate that the current PDCCH monitoring period is changed, where the changed PDCCH monitoring period may be configured by a higher layer signaling.

In addition, specifically, the second bit may be 2 bits, and in this case, indicates a change value of the PDCCH monitoring period or an index value of the PDCCH monitoring period in the PDCCH monitoring period set. Wherein the set of PDCCH monitoring periods is preconfigured by higher layer signaling. The PDCCH monitoring period set and the indication index value are explained below.

For example, the preconfigured set of PDCCH monitoring periods for higher layer signaling is { K1PDCCH monitoring opportunity, K2PDCCH monitoring opportunity, K3PDCCH monitoring opportunity, K4PDCCH monitoring opportunity }. At this time, the PDCCH monitoring indication corresponding to the target indication information may be as follows:

indicating a PDCCH monitoring opportunity with a PDCCH monitoring period of K1 by adopting '00'; indicating a PDCCH monitoring opportunity with a PDCCH monitoring period of K2 by adopting '01'; indicating a PDCCH monitoring opportunity with a PDCCH monitoring period of K3 by adopting '10'; "11" is used to indicate a PDCCH monitoring opportunity with PDCCH monitoring period K4.

It should be noted that, of course, the value of the first bit is not limited to be 1, and the value of the second bit is not limited to be 2, that is, the specific values of the first bit and the second bit are not specifically limited herein, and the values of the first bit and the second bit may be limited according to the actual situation.

Therefore, the PDCCH monitoring condition is indicated through the mode, so that the terminal can monitor the PDCCH according to the PDCCH monitoring period indicated by the target indication information of the preset field in the DCI, and the flexible monitoring process of the PDCCH is further realized.

In addition, further, in this embodiment, when the base station detects that the terminal no longer satisfies the power saving state, the base station sends a power saving signal carrying second power saving indication information to the terminal.

In this way, by sending the power saving signal carrying the second power saving indication to the terminal, the terminal can determine, according to the second power saving indication information, that the preset field in the DCI subsequently received by the terminal is used for indicating the original indication information before the DCI is not changed to the target indication information.

Specifically, the power saving signal may be explicit indication information, for example, displayed by 1 bit, and when the bit value of the power saving signal is 0, the power saving signal is indicated to carry second power saving indication information; the power saving signal may also be invisible indication information, for example, whether the power saving signal is a non-null value is displayed, and when the power saving signal is a null value, the indication information carried in the power saving signal is the second power saving indication information.

Therefore, the terminal can determine the original indication information indicated by the preset field in the subsequently received DCI according to the second power saving indication signal by sending the power saving signal carrying the second power saving indication information to the terminal, so that when the data service transmission quantity of the terminal is larger, the service delay requirement is improved, the PDCCH monitoring is abnormal, or new data arrives at the terminal, the service data transmission of a user is influenced by changing the PDCCH monitoring period, and the base station triggers the terminal to return to the conventional PDCCH monitoring mode through the power saving signal, thereby ensuring the normal service process of the terminal.

Thus, the PDCCH monitoring method provided by this embodiment can monitor the PDCCH when the base station detects that the terminal satisfies the preset condition for entering the power saving state, transmitting a power saving signal carrying first power saving indication information to the terminal, and changing original indication information of a preset field in DCI into target indication information, wherein the target indication information is used for indicating the PDCCH monitoring period, so that after the terminal receives the power-saving signal, it can be determined from the first power saving indication information that the meaning of the preset field in the subsequently received DCI has been changed, and then, according to the target indication information corresponding to the preset field in the DCI, performing subsequent PDCCH monitoring behaviors, realizing the PDCCH monitoring process by combining the power-saving signal and the DCI, and based on the fact that the PDCCH monitoring period can be indicated through the target indication information, realizing the flexible monitoring of the PDCCH and realizing the effective power saving of the terminal.

As shown in fig. 2, a second step flow chart of the PDCCH monitoring method in the embodiment of the present invention is shown, and the method includes the following steps:

step 201: and receiving a power saving signal transmitted by the base station.

In this step, specifically, the power saving signal is sent by the base station when detecting that the terminal meets the preset condition of entering the power saving state, and the power saving signal carries the first power saving indication information.

In addition, specifically, that the terminal satisfies the power saving state may mean that a data service of the terminal is a burst service, or a requirement of the terminal on the time delay is lower than a preset time delay threshold.

In addition, specifically, the power saving signal carries first power saving indication information, so that the terminal can determine, according to the first power saving indication information, that a preset field in subsequently received DCI is used for indicating a PDCCH monitoring period.

Step 202: and determining a preset field in the subsequently received downlink control information DCI to be used for indicating a physical downlink control channel PDCCH monitoring period according to the first power saving indication information.

In this step, specifically, when the terminal receives the power saving signal carrying the first power saving indication information, it may be determined that a preset field in the subsequently received DCI is used to indicate the PDCCH monitoring period according to the first power saving indication information.

Specifically, it is known through the first power saving indication information that the preset field in the subsequent received DCI is used for indicating the PDCCH monitoring period, that is, it is determined here that the indication meaning of the preset field in the DCI sent by the base station after the power saving signal is changed, so that the PDCCH monitoring period can be indicated through the preset field in the DCI, and thus the terminal can implement flexible monitoring of the PDCCH according to the PDCCH monitoring period corresponding to the preset field in the DCI.

Step 203: receiving DCI sent by the base station, and monitoring the PDCCH according to target indication information corresponding to a preset field in the DCI.

In this step, specifically, the target indication information is obtained by modifying, by the base station, original indication information of a preset field in the DCI, and the target indication information is used for indicating a PDCCH monitoring period. Therefore, when the terminal receives the DCI sent by the base station, the PDCCH monitoring can be carried out according to the target indication information corresponding to the preset field in the DCI.

In addition, it should be specifically noted herein that the format of the DCI is a preset format. It is understood that the preset format may be a format 0_1 or a format 1_ 1.

In addition, the preset field is a Bandwidth part indication field (Bandwidth part indicator) in the DCI. The original indication information of the bandwidth part indication field is used for indicating the switching of the bandwidth part, and the modified target indication information is used for indicating the PDCCH monitoring period. Namely, the meaning of the existing bandwidth indication field in the DCI is changed, so that the PDCCH monitoring period can be indicated through the DCI, and the terminal can perform a flexible PDCCH monitoring process through the bandwidth part indication field in the DCI.

In this way, the terminal in this embodiment first determines whether the meaning of the preset field in the DCI is changed through the first power saving indication information in the power saving signal, then performs acquisition of the PDCCH monitoring period through the preset field in the DCI, and performs a subsequent PDCCH monitoring action, thereby implementing a PDCCH monitoring process performed by combining the power saving signal and the DCI, and implementing flexible monitoring of the PDCCH by the terminal and effective power saving of the terminal based on the PDCCH monitoring period being indicated through the target indication information.

In addition, specific contents of the power saving signal can be referred to the description of the power saving signal in the above embodiment, and are not described herein again.

In addition, the target instruction information will be further described here.

when the length of the preset field is a first bit, the target indication information corresponding to the preset field indicates whether to change the current PDCCH monitoring period, wherein when the current PDCCH monitoring period is indicated to be changed, the changed PDCCH monitoring period is obtained through a high-level signaling;

and when the length of the preset field is a second bit, the target indication information corresponding to the preset field is a value indicating the PDCCH monitoring period or an index value of the PDCCH monitoring period in a PDCCH monitoring period set, wherein the PDCCH monitoring period set is obtained through high-level signaling.

Specifically, the first bit may be 1 bit, and at this time, a "0" may be used to indicate that the PDCCH monitoring period is not changed, that is, a default PDCCH monitoring period is used, and at this time, when the terminal analyzes that the value of the preset field is 0, the PDCCH monitoring is performed in the default PDCCH monitoring period; and changing the current PDCCH monitoring period by adopting a '1' instruction, and monitoring the PDCCH by adopting the PDCCH monitoring period configured by the high-level signaling when the terminal analyzes that the value of the preset field is 1.

In addition, specifically, the second bit may be 2 bits, and in this case, indicates a change value of the PDCCH monitoring period or an index value of the PDCCH monitoring period in the PDCCH monitoring period set. For a specific indication process, reference may be made to a base station side portion, which is not described herein again.

In addition, further, the embodiment may also receive a power saving signal carrying second power saving indication information and sent by the base station; and then according to the second power saving indication information, determining that a preset field in DCI subsequently received by the terminal is used for indicating original indication information before the target indication information is not changed.

Specifically, the power saving signal is sent when the base station detects that the terminal no longer satisfies the power saving state; in addition, specifically, the power saving signal may be explicit indication information, for example, 1 bit is used for displaying, when the bit value of the power saving signal is 0, the power saving signal is indicated to carry second power saving indication information, and at this time, the terminal determines that a preset field in subsequently received DCI is used for indicating original indication information; the power saving signal may also be invisible indication information, for example, whether the power saving signal is displayed by a non-null value, at this time, when the power saving signal is a null value, the indication information carried in the power saving signal is the second power saving indication information, and at this time, the terminal determines that a preset field in the subsequently received DCI is used to indicate the original indication information.

Therefore, by receiving the power saving signal carrying the second power saving indication information, the terminal can determine that the preset field in the subsequent received DCI is used for indicating the original indication information according to the second power saving indication information, so that when the data service transmission quantity of the terminal is larger, the service delay requirement is improved, the PDCCH monitoring is abnormal, or new data arrives at the terminal, the service data transmission of a user is influenced based on the change of the PDCCH monitoring period, and the base station triggers the terminal to return to the conventional PDCCH monitoring mode through the power saving signal, thereby ensuring the normal service process of the terminal.

In this way, the PDCCH monitoring method provided in this embodiment receives a power saving signal carrying first power saving indication information sent by a base station, determines a preset field in a subsequent received DCI according to the first power saving indication information to indicate a PDCCH monitoring period, and further performs a subsequent PDCCH monitoring action according to target indication information corresponding to the preset field in the received DCI, so that a PDCCH monitoring process performed by combining the power saving signal and the DCI is implemented, and based on that the PDCCH monitoring period can be indicated by the target indication information, flexible monitoring of the PDCCH is implemented, and effective power saving of a terminal is implemented.

The PDCCH monitoring procedure in this embodiment is described below with a specific implementation procedure.

First, when the data traffic of the terminal is a burst traffic and the delay requirement is relatively low, the base station may indicate to the terminal to enter the power saving mode through the power saving signal. The power saving signal can be carried by a new physical layer signal, a new MAC layer signal, or higher layer signaling, or a bit field for adding power saving indication in the existing physical layer signal or MAC layer signal.

If the power saving signal is a new signal, such as the power saving signal sent outside the DRX activation period of the terminal, the power saving signal may be sent periodically, that is, the terminal periodically monitors the power saving signal; it may also be non-periodic transmission, i.e. listening at a specific time, e.g. at a preset offset before the DRX active period. The first power saving indication information is carried by the power saving signal.

If the power saving signal is based on adding a new bit field in the existing signal, such as adding a power saving related bit field in the scheduling DCI during terminal DRX activation, for example, adding a power saving indication information bit field in DCI format 0_1 or 1_ 1.

In addition, specifically, the power saving signal may be an explicit indication, such as a bit, or an implicit indication, such as detecting that the power saving signal is a non-null value, that is, the power saving signal carries the first power saving indication information, that is, the power saving state is turned on. Furthermore, other ways of indication are not excluded.

For example, taking a display indication of one bit as an example, when the power saving indication is "1", indicating the terminal to perform a power saving state, that is, determining a preset field in subsequently received DCI to indicate a PDCCH monitoring period; in addition, when the power saving indication is '0' or the terminal does not detect the power saving signal, the terminal performs a default PDCCH monitoring mode, that is, performs PDCCH monitoring at each PDCCH monitoring opportunity.

When the terminal monitors the power saving signal sent by the base station, the terminal is triggered to enter a power saving state. When the terminal is triggered to enter the power saving state, the terminal indicates the subsequent PDCCH monitoring behavior in the information field of the Bandwidth part indicator (Bandwidth part indicator) in the received DCI format 0_1 or 1_ 1.

In the data packet transmission process, the base station does not need to indicate the terminal to skip the PDCCH monitoring, and the Bandwidth part indicator in the scheduling DCI is set to 0 bit.

And when the data packet transmission is finished, the base station indicates that the user can carry out PDCCH monitoring skipping subsequently by scheduling DCI.

If the information field indication of the Bandwidth part indicator is 1 bit, the base station sets the Bandwidth part indicator carried in the DCI to '1' to indicate that the terminal can change the PDCCH monitoring period. The specific PDCCH monitoring period is preconfigured by a higher layer signaling, for example, the PDCCH monitoring period before being modified may be 1slot (slot), and the PDCCH monitoring period after being modified is 2 slots.

If the information field indication of the Bandwidth part indicator is 2 bits, the base station sets the Bandwidth part indicator carried in the DCI to any one of "01", "10" or "11", indicating that the terminal can change the PDCCH monitoring period, and the changed PDCCH monitoring period is a period value corresponding to a PDCCH monitoring period set pre-configured in a higher layer signaling by the PDCCH monitoring indication. For example, the PDCCH monitoring period corresponding to "00" may be 1slot, the PDCCH monitoring period corresponding to "01" may be 2slots, "the PDCCH monitoring period corresponding to" 10 "may be 4slots, and the PDCCH monitoring period corresponding to" 11 "may be 8 slots.

If the terminal receives the power-saving signal and the Bandwidth part indicator in the DCI is empty or zero, namely '0' or '00', the terminal does not change the PDCCH monitoring period, namely PDCCH monitoring is carried out in the next slot; if the terminal receives the power saving signal and the Bandwidth part indicator in the DCI is a non-zero value, i.e. not '0' or '00', the terminal monitors the PDCCH according to the PDCCH monitoring period indicated by the Bandwidth part indicator or the PDCCH monitoring period preconfigured by RRC, such as 2slots, and then monitors the PDCCH by taking 2slots as the period until a new Bandwidth part indicator is received.

Secondly, when the data service transmission quantity of the terminal is large, or the time delay requirement of the service is improved, or the PDCCH monitoring is abnormal, or new data arrives at the terminal, skipping the PDCCH monitoring can affect the service data transmission of the user, and the base station triggers the terminal to return to a default PDCCH monitoring mode through the power-saving signal. Here, the power saving signal may be a new physical layer signal, or may be DCI or MAC CE. The power saving signal may be an explicit indication, such as a bit, or an implicit indication, such as detecting that the power saving signal is empty, without excluding other ways of indicating.

And when the terminal monitors the power-saving signal sent by the base station, triggering and returning to a default PDCCH monitoring mode. Taking the display indication of one bit as an example, when the power saving indication is "0" or the terminal does not detect the power saving signal at the time of sending the power saving signal, the terminal reverts to the default PDCCH monitoring mode, that is, performs PDCCH monitoring at each PDCCH monitoring opportunity. When the terminal is triggered to return to the default PDCCH monitoring mode, the terminal receives the information field of the Bandwidth part indicator in the DCI format 0_1 or 1_1 again to indicate the BWP information to be switched.

Thirdly, after the base station triggers the terminal to enter the power saving state through the power saving signal, the information field of the Bandwidth part indicator in the DCI indicates that the original BWP switching function is changed. If the base station wants to trigger the terminal to perform BWP handover, the base station will carry BWP indication information in the power saving signal, for example, ID of the BWP to be handed over, or index value of the BWP set configured in the higher layer signaling, without excluding other BWP related information.

When the terminal receives the power-saving signal and is triggered to enter the power-saving state, if the BWP carried in the power-saving signal is inconsistent with the currently activated BWP information, the terminal will switch to the BWP indicated by the power-saving signal. After that, the Bandwidth part indicator carried in the DCI on the active BWP is no longer used as a BWP handover indication but used for other functions, such as a PDCCH listening period indication.

When the terminal receives the power-saving signal and is triggered to enter a power-saving state, if the BWP carried in the power-saving signal is consistent with the currently activated BWP information, the terminal does not perform BWP handover, but the Bandwidth part indicator carried in the subsequent DCI is no longer used as the BWP handover indication but used for other functions, such as PDCCH monitoring period indication, until the base station performs BWP handover triggering through the power-saving signal, i.e. reverts to the default PDCCH monitoring mode triggering.

When the terminal receives the power-saving signal and is triggered to return to the default PDCCH monitoring mode, the terminal performs BWP switching according to a Bandwidth part indicator carried in the DCI.

Thus, the PDCCH monitoring method provided by this embodiment implements a PDCCH monitoring process by combining the power-saving signal and the DCI, and based on the PDCCH monitoring period indicated by the target indication information, thereby implementing flexible monitoring of the PDCCH and implementing effective power saving of the terminal.

As shown in fig. 3, which is one of block diagrams of a PDCCH monitoring apparatus in this transmission embodiment, the apparatus includes:

a first sending module 301, configured to send a power saving signal to a terminal when a base station detects that the terminal meets a preset condition for entering a power saving state, where the power saving signal carries first power saving indication information;

a changing module 302, configured to acquire DCI to be sent to the terminal, and change original indication information of a preset field in the DCI into target indication information, where the target indication information is used to indicate a PDCCH monitoring period;

a second sending module 303, configured to send the DCI to the terminal.

As shown in fig. 4, a second block diagram of the PDCCH monitoring apparatus in this transmission embodiment is shown, and the apparatus includes:

a first receiving module 401, configured to receive a power saving signal sent by a base station, where the power saving signal carries first power saving indication information;

a determining module 402, configured to determine, according to the first power saving indication information, that a preset field in a subsequent received downlink control information DCI is used to indicate a PDCCH monitoring period of a physical downlink control channel;

a second receiving module 403, configured to receive DCI sent by a base station, and perform PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, where the target indication information is used to indicate a PDCCH monitoring period.

In addition, as shown in fig. 5, an entity structure diagram of a base station or a terminal provided in the embodiment of the present invention is shown, where the base station or the terminal may include: a processor (processor)510, a communication Interface (Communications Interface)520, a memory (memory)530 and a communication bus 540, wherein the processor 510, the communication Interface 520 and the memory 530 communicate with each other via the communication bus 540. Processor 510 may invoke a computer program stored on memory 530 and executable on processor 510 to perform the steps of:

when a base station detects that a terminal meets a preset condition of entering a power saving state, a power saving signal is sent to the terminal, wherein the power saving signal carries first power saving indication information; acquiring DCI to be sent to the terminal, and changing original indication information of a preset field in the DCI into target indication information, wherein the target indication information is used for indicating a PDCCH monitoring period; and sending the DCI to the terminal.

Optionally, the DCI format is a preset format, and the preset field is a bandwidth part indication field.

Optionally, the changing the original indication information of the preset field in the DCI into the target indication information includes: the target indication information indicates that the PDCCH monitoring period is not changed or changed; or, the target indication information indicates a value of a default PDCCH monitoring period or a value of a modified PDCCH monitoring period.

Optionally, the length of the preset field is a first bit or a second bit; when the length of the preset field is a first bit, the target indication information corresponding to the preset field indicates whether to change the current PDCCH monitoring period, wherein when the change of the current PDCCH monitoring period is indicated, the changed PDCCH monitoring period is preconfigured by a high-level signaling; when the length of the preset field is a second bit, the target indication information corresponding to the preset field is a value indicating the PDCCH monitoring period or an index value of the PDCCH monitoring period in a PDCCH monitoring period set, wherein the PDCCH monitoring period set is preconfigured by a high-level signaling.

Optionally, the following steps may also be performed: and when the base station detects that the terminal does not meet the power saving state any more, sending a power saving signal carrying second power saving indication information to the terminal.

Or, the following steps are executed:

receiving a power saving signal sent by a base station, wherein the power saving signal carries first power saving indication information; determining a preset field in the subsequent received downlink control information DCI to be used for indicating a physical downlink control channel PDCCH monitoring period according to the first power saving indication information; receiving DCI sent by a base station, and performing PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, wherein the target indication information is used for indicating a PDCCH monitoring period.

Optionally, the length of the preset field is a first bit or a second bit; when the length of the preset field is a first bit, the target indication information corresponding to the preset field indicates whether to change the current PDCCH monitoring period, wherein when the current PDCCH monitoring period is indicated to be changed, the changed PDCCH monitoring period is obtained through a high-level signaling; and when the length of the preset field is a second bit, the target indication information corresponding to the preset field is a value indicating the PDCCH monitoring period or an index value of the PDCCH monitoring period in a PDCCH monitoring period set, wherein the PDCCH monitoring period set is obtained through high-level signaling.

Optionally, the following steps may also be performed: receiving a power saving signal which is sent by the base station and carries second power saving indication information; and determining that a preset field in DCI subsequently received by the terminal is used for indicating original indication information before the target indication information is not changed according to the second power saving indication information.

Furthermore, the logic instructions in the memory 530 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the method provided in the foregoing embodiments when executed by a processor, and the method includes: when a base station detects that a terminal meets a preset condition of entering a power saving state, a power saving signal is sent to the terminal, wherein the power saving signal carries first power saving indication information; acquiring DCI to be sent to the terminal, and changing original indication information of a preset field in the DCI into target indication information, wherein the target indication information is used for indicating a PDCCH monitoring period; and sending the DCI to the terminal.

Alternatively, it comprises: receiving a power saving signal sent by a base station, wherein the power saving signal carries first power saving indication information; determining a preset field in the subsequent received downlink control information DCI to be used for indicating a physical downlink control channel PDCCH monitoring period according to the first power saving indication information; receiving DCI sent by a base station, and performing PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, wherein the target indication information is used for indicating a PDCCH monitoring period.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A PDCCH monitoring method is characterized by comprising the following steps:

transmitting the DCI to the terminal;

the first power saving indication information is used for determining that a preset field in the DCI is used for indicating a PDCCH monitoring period;

the format of the DCI is a preset format, and the preset field is a bandwidth part indication field.

2. The PDCCH monitoring method according to claim 1, wherein the changing the original indication information of the preset field in the DCI into the target indication information includes:

the target indication information indicates that the PDCCH monitoring period is not changed or changed; or, the target indication information indicates a value of a default PDCCH monitoring period or a value of a modified PDCCH monitoring period.

3. The PDCCH monitoring method according to claim 1, wherein the length of the preset field is a first bit or a second bit; wherein the content of the first and second substances,

when the length of the preset field is a first bit, the target indication information corresponding to the preset field indicates whether to change the current PDCCH monitoring period, wherein when the change of the current PDCCH monitoring period is indicated, the changed PDCCH monitoring period is preconfigured by a high-level signaling;

4. The PDCCH monitoring method according to claim 1, further comprising:

and when the base station detects that the terminal does not meet the power saving state any more, sending a power saving signal carrying second power saving indication information to the terminal.

5. A PDCCH monitoring method is characterized by comprising the following steps:

receiving DCI sent by a base station, and performing PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, wherein the target indication information is used for indicating a PDCCH monitoring period;

6. The PDCCH monitoring method according to claim 5, wherein the length of the preset field is a first bit or a second bit; wherein the content of the first and second substances,

7. The PDCCH monitoring method according to claim 5, further comprising:

receiving a power saving signal which is sent by the base station and carries second power saving indication information;

and determining that a preset field in DCI subsequently received by the terminal is used for indicating original indication information before the target indication information is not changed according to the second power saving indication information.

8. A PDCCH monitoring apparatus, comprising:

a second sending module, configured to send the DCI to the terminal;

9. A PDCCH monitoring apparatus, comprising:

a second receiving module, configured to receive DCI sent by a base station, and perform PDCCH monitoring according to target indication information corresponding to a preset field in the DCI, where the target indication information is used to indicate a PDCCH monitoring period;

10. A base station comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

transmitting the DCI to the terminal;

11. The base station of claim 10, wherein the changing the original indication information of the preset field in the DCI into the target indication information comprises:

12. The base station of claim 10, wherein the length of the preset field is a first bit or a second bit; wherein the content of the first and second substances,

13. The base station of claim 10, wherein the processor when executing the program further performs the steps of:

14. A terminal comprising a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

15. The terminal of claim 14, wherein the length of the preset field is a first bit or a second bit; wherein the content of the first and second substances,

16. The terminal of claim 14, wherein the processor, when executing the program, further performs the steps of:

17. A non-transitory computer readable storage medium, having stored thereon a computer program, which, when being executed by a processor, implements the steps of the PDCCH monitoring method according to any of claims 1 to 7.