CN109803409B - PDCCH detection method, device and computer readable storage medium - Google Patents
PDCCH detection method, device and computer readable storage medium Download PDFInfo
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Abstract
The embodiment of the invention provides a method, a device and a computer-readable storage medium for detecting PDCCH, wherein the method comprises the following steps: receiving an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource; and determining PDCCH detection behaviors of the terminal based on the indication.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method and apparatus for detecting a Physical Downlink Control Channel (PDCCH), and a computer readable storage medium.
Background
In 5G NR, for semi-static frame structures of different periods, a fixed downlink transmission resource, a fixed uplink transmission resource, and an unknown resource are included, as shown in fig. 1. The unknown resource (unknown resource) is flexible, is a resource which is dynamically changeable except for a fixed downlink transmission resource and a fixed uplink transmission resource and has uncertain transmission direction and purpose, flexible guard interval (GP) configuration can be realized, and enough forward compatibility is provided. The unknown resources can be re-indicated by SFI and/or DCI, and whether the User Equipment (UE) needs to perform PDCCH detection is a problem to be solved for the unknown resources indicated by the slotted mode information (SFI) or the Downlink Control Information (DCI).
Disclosure of Invention
In view of this, embodiments of the present invention desire to provide a method, an apparatus, and a computer-readable storage medium for detecting PDCCH.
In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:
the embodiment of the invention provides a method for detecting a Physical Downlink Control Channel (PDCCH), which comprises the following steps:
receiving an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and determining PDCCH detection behaviors of the terminal based on the indication.
The indication of the terminal behavior mode sent by the base station is carried in a Radio Resource Control (RRC) signaling.
The indication of the terminal behavior mode sent by the base station is realized in one or more of the following modes:
if the terminal is configured to be based on non-slot scheduling, the terminal detects PDCCH in the unknown resource; if the terminal is configured to receive in a discontinuous reception C-DRX transmission mode in a connected state, the terminal detects PDCCH in an unknown resource; if the terminal is configured to receive in the connected discontinuous reception C-DRX transmission mode, the terminal does not detect the PDCCH in the unknown resource.
The determining the PDCCH detection behavior of the terminal includes:
if the indication of the terminal behavior mode is not received, or the indication of the terminal behavior mode is received and the received indication is that the PDCCH is not detected in the unknown resource, the PDCCH is not detected in the unknown resource.
Optionally, the determining the PDCCH detection behavior of the terminal further includes:
and if the indication of the terminal behavior mode is received, the indication is that the terminal detects the PDCCH in the unknown resource, and the PDCCH is detected in the unknown resource.
Optionally, the method further comprises:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH is determined to conflict with the behavior of switching the terminal to uplink transmission, the behavior of detecting the PDCCH is abandoned.
Optionally, the method further comprises:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH conflicts with the behavior of switching the terminal to uplink transmission, determining whether to detect the PDCCH or not based on preset conditions built in the terminal.
Wherein the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
The embodiment of the invention also provides a method for detecting the physical downlink control channel PDCCH, which comprises the following steps:
setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and sending the indication of the terminal behavior mode, wherein the indication is used for judging the PDCCH detection behavior of the terminal based on the indication.
In one embodiment, the setting the indication of the terminal behavior mode includes:
the indication bearer is set in radio resource control, RRC, signalling.
In one embodiment, the setting the indication of the terminal behavior mode includes:
setting the terminal as non-slot-based scheduling; or,
the terminal is set to receive in the C-DRX transmission mode.
The embodiment of the invention also provides a device for detecting the physical downlink control channel PDCCH, which comprises:
the receiving module is used for receiving the indication of the terminal behavior mode sent by the base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and the processing module is used for determining the PDCCH detection behavior of the terminal based on the indication.
The embodiment of the invention also provides a device for detecting the physical downlink control channel PDCCH, which comprises:
the setting module is used for setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and the sending module is used for sending the indication of the terminal behavior mode and judging the PDCCH detection behavior of the terminal based on the indication.
The embodiment of the invention also provides a device for detecting the physical downlink control channel PDCCH, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute the steps of the above method when running the computer program.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the steps of the above method.
The PDCCH detection method, the PDCCH detection device and the computer readable storage medium provided by the embodiment of the invention receive the indication of the terminal behavior mode sent by the base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource; and determining PDCCH detection behaviors of the terminal based on the indication. The base station in the embodiment of the invention indicates whether the terminal detects the PDCCH in the unknown resource or not, and the terminal determines whether to detect the PDCCH or not based on the corresponding indication, so that the problem of whether the terminal detects the PDCCH in the unknown resource or not can be solved, and the requirements of time delay and power consumption can be more flexibly adapted.
Drawings
FIG. 1 is a diagram of a semi-static frame structure in a conventional 5G NR;
fig. 2 is a flowchart of a method for detecting PDCCH according to an embodiment of the present invention;
fig. 3 is a second flowchart of a method for detecting PDCCH according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a PDCCH detection apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second embodiment of a PDCCH detection apparatus according to the present invention;
FIG. 6 is a schematic diagram of a first structure of unknown resources in a frame structure according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a second structure of unknown resources in a frame structure according to an embodiment of the present invention.
Detailed Description
The invention is described below with reference to the drawings and examples.
The embodiment of the invention provides a PDCCH detection method, which is applied to a terminal, as shown in figure 2, and comprises the following steps:
step 201: receiving an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
step 202: and determining PDCCH detection behaviors of the terminal based on the indication.
The base station in the embodiment of the invention indicates whether the terminal detects the PDCCH in the unknown resource or not, and the terminal determines whether to detect the PDCCH or not based on the corresponding indication, so that the problem of whether the terminal detects the PDCCH in the unknown resource or not can be solved, and the requirements of time delay and power consumption can be more flexibly adapted.
In one embodiment, the indication of the terminal behavior pattern sent by the base station is carried in radio resource control RRC signaling.
In one embodiment, the indication of the terminal behavior mode sent by the base station is implemented by one or more of the following manners:
if the terminal is configured for non-slot level (non-slot) based scheduling, the terminal detects a PDCCH in an unknown resource; if the terminal is configured for reception in a discontinuous reception (C-DRX) transmission mode in a connected state, the terminal detects the PDCCH in an unknown resource; if the terminal is configured for reception in the C-DRX transmission mode, the terminal does not detect the PDCCH in the unknown resource.
Here, because the PDCCH (UL grant or DL grant) is detected in the unknown resource, a lower time delay can be achieved, and the non-slot scheduling has a higher requirement on the time delay, so when the terminal is configured to transmit in a non-slot scheduling manner, it is implicitly indicated that the PDCCH is to be detected in the unknown resource; or,
for the transmission process configured with C-DRX, on Duration Timer indicates the on-line duration after the UE wakes up in one DRX cycle, and uses the number of PDCCH subframes as a basic unit. In order to reduce the wake-up time of the terminal, and achieve the purpose of power saving, when configured as a C-DRX transmission, implicitly indicates that the PDCCH needs to be detected in an unknown resource, or implicitly indicates that the PDCCH does not need to be detected in an unknown resource.
In one embodiment, the determining the PDCCH detection behavior of the terminal includes:
if the indication of the terminal behavior mode is not received, or the indication of the terminal behavior mode is received and the received indication is that the PDCCH is not detected in the unknown resource, the PDCCH is not detected in the unknown resource.
In one embodiment, the determining the PDCCH detection behavior of the terminal further includes:
and if the indication of the terminal behavior mode is received, the indication is that the terminal detects the PDCCH in the unknown resource, and the PDCCH is detected in the unknown resource.
In one embodiment, the method further comprises:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH is determined to conflict with the behavior of switching the terminal to uplink transmission, the behavior of detecting the PDCCH is abandoned.
In one embodiment, the method further comprises:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH conflicts with the behavior of switching the terminal to uplink transmission, determining whether to detect the PDCCH or not based on preset conditions built in the terminal.
In an embodiment of the present invention, the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
The embodiment of the invention also provides a method for detecting the PDCCH, which is applied to the base station, as shown in figure 3, and comprises the following steps:
step 301: setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
step 302: and sending the indication of the terminal behavior mode, wherein the indication is used for judging the PDCCH detection behavior of the terminal based on the indication.
The base station in the embodiment of the invention indicates whether the terminal detects the PDCCH in the unknown resource or not, and the terminal determines whether to detect the PDCCH or not based on the corresponding indication, so that the problem of whether the terminal detects the PDCCH in the unknown resource or not can be solved, and the requirements of time delay and power consumption can be more flexibly adapted.
In an embodiment of the present invention, the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
In one embodiment of the present invention, the indication of the terminal behavior mode sent by the base station is carried in radio resource control RRC signaling.
In one embodiment of the present invention, the setting the indication of the terminal behavior mode includes:
the indication bearer is set in radio resource control, RRC, signalling.
In one embodiment of the present invention, the setting an indication of a terminal behavior mode includes:
setting the terminal as non-slot-based scheduling; or,
the terminal is set to receive in the C-DRX transmission mode.
In one embodiment of the present invention, the sending the indication further includes:
the indication is sent at least one slot in advance (relative to the radio resource).
The embodiment of the invention also provides a device for detecting the PDCCH, which is applied to the terminal, as shown in fig. 4, and comprises:
a receiving module 401, configured to receive an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
a processing module 402 is configured to determine a PDCCH detection behavior of the terminal based on the indication.
The base station in the embodiment of the invention indicates whether the terminal detects the PDCCH in the unknown resource or not, and the terminal determines whether to detect the PDCCH or not based on the corresponding indication, so that the problem of whether the terminal detects the PDCCH in the unknown resource or not can be solved, and the requirements of time delay and power consumption can be more flexibly adapted.
In one embodiment, the indication of the terminal behavior pattern sent by the base station is carried in radio resource control RRC signaling.
The indication of the terminal behavior mode sent by the base station is realized by one or more of the following modes:
if the terminal is configured for non-slot level (non-slot) based scheduling, the terminal detects a PDCCH in an unknown resource; if the terminal is configured for reception in a discontinuous reception (C-DRX) transmission mode in a connected state, the terminal detects the PDCCH in an unknown resource; if the terminal is configured for reception in the C-DRX transmission mode, the terminal does not detect the PDCCH in the unknown resource.
In one embodiment, the processing module 402 determines PDCCH detection behavior of the terminal, including:
if the indication of the terminal behavior mode is not received, or the indication of the terminal behavior mode is received and the received indication is that the PDCCH is not detected in the unknown resource, the PDCCH is not detected in the unknown resource.
In one embodiment, the determining, by the processing module 402, the PDCCH detection behavior of the terminal further includes:
and if the indication of the terminal behavior mode is received, the indication is that the terminal detects the PDCCH in the unknown resource, and the PDCCH is detected in the unknown resource.
In one embodiment, the processing module 402 is further configured to determine that the PDCCH is detected in the unknown resource, and that the behavior of detecting the PDCCH conflicts with the behavior of the terminal switching to uplink, and discard the behavior of detecting the PDCCH.
In one embodiment, the processing module 402 is further configured to determine whether to detect the PDCCH in the unknown resource, and determine that the behavior of detecting the PDCCH conflicts with the behavior of switching the terminal to uplink transmission, and determine whether to perform PDCCH detection based on a preset condition built in the terminal.
Wherein the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
The embodiment of the invention also provides a device for detecting the PDCCH, which is applied to the base station, as shown in fig. 5, and comprises:
a setting module 501, configured to set an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and the sending module 502 is configured to send an indication of the terminal behavior mode, and the terminal is configured to determine its PDCCH detection behavior based on the indication.
The base station in the embodiment of the invention indicates whether the terminal detects the PDCCH in the unknown resource or not, and the terminal determines whether to detect the PDCCH or not based on the corresponding indication, so that the problem of whether the terminal detects the PDCCH in the unknown resource or not can be solved, and the requirements of time delay and power consumption can be more flexibly adapted.
In an embodiment of the present invention, the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
In one embodiment of the present invention, the indication of the terminal behavior mode sent by the sending module 502 is carried in radio resource control RRC signaling.
In the embodiment of the present invention, the setting module 501 sets an instruction of a terminal behavior mode, including:
setting the terminal as non-slot-based scheduling; or,
the terminal is set to receive in the C-DRX transmission mode.
In one embodiment, when the sending module 502 sends the indication, the sending module is further configured to
And transmitting the indication information at least one slot in advance.
The embodiment of the invention also provides a device for detecting the PDCCH, which comprises the following steps: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
receiving an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and determining PDCCH detection behaviors of the terminal based on the indication.
The indication of the terminal behavior mode sent by the base station is carried in a Radio Resource Control (RRC) signaling.
The indication of the terminal behavior mode sent by the base station is realized in one or more of the following modes:
if the terminal is configured to be based on non-slot scheduling, the terminal detects PDCCH in the unknown resource; if the terminal is configured to receive in a discontinuous reception C-DRX transmission mode in a connected state, the terminal detects PDCCH in an unknown resource; if the terminal is configured to receive in the connected discontinuous reception C-DRX transmission mode, the terminal does not detect the PDCCH in the unknown resource.
The processor is further configured to, when executing the computer program, perform:
if the indication of the terminal behavior mode is not received, or the indication of the terminal behavior mode is received and the received indication is that the PDCCH is not detected in the unknown resource, the PDCCH is not detected in the unknown resource.
The processor is further configured to, when executing the computer program, perform:
and if the indication of the terminal behavior mode is received, the indication is that the terminal detects the PDCCH in the unknown resource, and the PDCCH is detected in the unknown resource.
The processor is further configured to execute, when the computer program is executed:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH is determined to conflict with the behavior of switching the terminal to uplink transmission, the behavior of detecting the PDCCH is abandoned.
The processor is further configured to execute, when the computer program is executed:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH conflicts with the behavior of switching the terminal to uplink transmission, determining whether to detect the PDCCH or not based on preset conditions built in the terminal.
Wherein the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
The embodiment of the invention also provides a device for detecting the PDCCH, which comprises the following steps: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and sending the indication of the terminal behavior mode, wherein the indication is used for judging the PDCCH detection behavior of the terminal based on the indication.
The processor is further configured to, when executing the computer program, perform:
the indication bearer is set in radio resource control, RRC, signalling.
The processor is further configured to, when executing the computer program, perform:
setting the terminal as non-slot-based scheduling; or,
the terminal is set to receive in the C-DRX transmission mode.
It should be noted that: in the apparatus provided in the above embodiment, only the division of each program module is used for illustration when detecting PDCCH, and in practical application, the above processing allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the above processing. In addition, the apparatus provided in the foregoing embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes of the apparatus and the corresponding method embodiments are detailed in the method embodiments, which are not described herein again.
In an exemplary embodiment, the present invention further provides a computer readable storage medium, which may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM; but may be a variety of devices including one or any combination of the above-described memories, such as a mobile phone, computer, tablet device, personal digital assistant, or the like.
The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
receiving an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and determining PDCCH detection behaviors of the terminal based on the indication.
The indication of the terminal behavior mode sent by the base station is carried in a Radio Resource Control (RRC) signaling.
The indication of the terminal behavior mode sent by the base station is realized in one or more of the following modes:
if the terminal is configured to be based on non-slot scheduling, the terminal detects PDCCH in the unknown resource; if the terminal is configured to receive in a discontinuous reception C-DRX transmission mode in a connected state, the terminal detects PDCCH in an unknown resource; if the terminal is configured to receive in the connected discontinuous reception C-DRX transmission mode, the terminal does not detect the PDCCH in the unknown resource.
When the PDCCH detection behavior of the terminal is determined, the computer program is executed by the processor and further executes:
if the indication of the terminal behavior mode is not received, or the indication of the terminal behavior mode is received and the received indication is that the PDCCH is not detected in the unknown resource, the PDCCH is not detected in the unknown resource.
When the PDCCH detection behavior of the terminal is determined, the computer program is executed by the processor and further executes:
and if the indication of the terminal behavior mode is received, the indication is that the terminal detects the PDCCH in the unknown resource, and the PDCCH is detected in the unknown resource.
The computer program, when executed by the processor, further performs:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH is determined to conflict with the behavior of switching the terminal to uplink transmission, the behavior of detecting the PDCCH is abandoned.
The computer program, when executed by the processor, further performs:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH conflicts with the behavior of switching the terminal to uplink transmission, determining whether to detect the PDCCH or not based on preset conditions built in the terminal.
The unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource;
and sending the indication of the terminal behavior mode, wherein the indication is used for judging the PDCCH detection behavior of the terminal based on the indication.
When the instruction of the terminal behavior mode is set, the computer program is executed by the processor and further executes:
the indication bearer is set in radio resource control, RRC, signalling.
When the instruction of the terminal behavior mode is set, the computer program is executed by the processor and further executes:
setting the terminal as non-slot-based scheduling; or,
the terminal is set to receive in the C-DRX transmission mode.
The invention is described below in connection with scene embodiments.
TD-LTE employs a Sub-frame (Sub-frame) structure of equal length: each subframe is 1ms and contains two 0.5ms slots; the 10 subframes constitute a Radio Frame (Radio Frame) of 10 ms. TD-LTE introduces a special subframe consisting of a downlink pilot time slot (DwPTS, downlink Pilot Time Slot), a Guard Period (GP), and an uplink pilot time slot (UpPTS, uplink Pilot Time Slot). The special subframe configuration of the existing LTE is as follows table 1:
TABLE 1 (TS36.211 Table 4.2-1:Configuration of special subframe (Lengths of DwPTS/GP/UpPTS))
By dividing the time guard interval (GP) as a cost, uplink and downlink transmission can be realized on the same frequency band of TD-LTE. In order to meet the requirements of different coverage scenes, in one radio frame of the TD-LTE system, 7 different configurations are provided for an uplink transmission common subframe (U), a downlink transmission common subframe (D) and a special subframe (S). By adjusting the ratio of the uplink subframe number to the downlink subframe number, the TD-LTE system can meet the requirements of different uplink and downlink traffic ratios. The uplink and downlink subframe configuration of the existing LTE is as follows in table 2:
TABLE 2 (TS36.211 Table 4.2-2: uplink-downlink configurations)
As can be seen from the above description, the uplink and downlink resource allocation of the existing LTE is fixed, the setting of GP is relatively stiff, and is not easy to adjust, which easily causes problems such as remote base station interference.
In 5G NR, unknown resources in the semi-static frame structure can be re-indicated by SFI and/or DCI, such as indicated as DL-only, UL-only, DL-domain, or UL-domain. For unknown resources, whether the terminal is required to detect the PDCCH is to be solved. As shown in fig. 6, for the unknown resource 1, the sfi indicates a slot of DL-domain, specifically, the first 9 symbols are downlink resources, the middle 3 symbols are unknown resources, and the last 2 symbols are uplink resources.
For unknown resource 2, the sfi indicates a time slot of UL-domain, specifically, the first 2 symbols are downlink resources, the middle 3 symbols are unknown resources, and the last 9 symbols are uplink resources.
For unknown resource 3, the sfi indicates an unknown slot, specifically, the first 2 symbols are downlink resources, the middle 10 symbols are unknown resources, and the last 2 symbols are uplink resources. Further, for unknown resource 3, DCI may further indicate that the 3 rd to 7 th symbols are also downlink resources, so that the slot becomes a slot of DL-domain.
The base station in the embodiment of the invention indicates whether the PDCCH is detected in the unknown resource or not to the UE in a signaling or implicit mode, so that the problem that whether the PDCCH is detected in the unknown resource by the UE can be solved.
The base station may instruct the two terminal behavior modes, and the terminal determines its own PDCCH detection behavior according to this indication. One of the modes is to detect the PDCCH in an unknown resource, and the other mode is not to detect the PDCCH in an unknown resource.
In the embodiment of the invention, if the terminal does not receive the two terminal behavior modes indicated by the base station, the terminal does not detect the PDCCH in the unknown resource.
Here, after the cell-specific signaling has configured the frame structure, before the UE has not established the RRC connection, the terminal adopts a default mode: the PDCCH is not detected. After the RRC establishes a connection, the terminal may receive higher layer signaling dedicated to the UE, thereby determining a frame structure, or may receive signaling indicating to detect the PDCCH or signaling indicating not to detect the PDCCH, thereby determining terminal behavior.
Wherein the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the unknown transmission resources indicated in the Slot Format Indication (SFI) or the resources not explicitly indicated as downlink/uplink transmissions.
In one embodiment of the present invention, the base station may inform the terminal of the indication by explicit signaling, such as: RRC signaling or MAC CE, etc.
In one embodiment of the present invention, the indication sent by the base station may also be implicit. In particular, the method comprises the steps of,
a) The terminal determines whether to detect the PDCCH according to the scheduling of whether the PDCCH is a non-slot. Here, because the PDCCH (UL grant or DL grant) is detected in the unknown resource, lower delay can be achieved, and the non-slot scheduling has a higher requirement on delay, so when the terminal is configured by the base station to transmit in a non-slot scheduling manner, the base station implicitly indicates that the terminal needs to detect the PDCCH in the unknown resource.
b) The terminal determines whether to detect the PDCCH in an unknown resource according to whether it is configured as a C-DRX transmission. Here, on Duration Timer indicates an on-line duration after the UE wakes up in one DRX cycle in the transmission process in which the C-DRX is configured, and the number of PDCCH subframes is a basic unit. In order to reduce the wake-up time of the terminal and achieve the purpose of power saving, when the terminal is configured into C-DRX transmission, the base station implicitly indicates that the terminal needs to detect the PDCCH in the unknown resource or implicitly indicates that the terminal does not need to detect the PDCCH in the unknown resource.
In the embodiment of the invention, the indication of the base station can be informed in advance, at least one slot is informed in advance, so that the utilization rate of uplink resources in unknown resources can be improved, and the blind detection times of PDCCH can be reduced.
In the embodiment of the present invention, if the terminal detects the PDCCH in the unknown resource, one or more of the following modes need to be considered to ensure uplink and downlink handover:
a) The terminal judges that if the behavior of detecting the PDCCH conflicts with the behavior of switching to uplink transmission, the terminal does not perform (abandon) PDCCH detection.
b) The terminal does not expect the conflict between the behavior of switching to uplink transmission and the behavior of detecting the PDCCH, namely the terminal judges that if the behavior of detecting the PDCCH conflicts with the behavior of switching to uplink transmission, the terminal considers the error condition, the specific behavior of the terminal depends on the preset condition built in the terminal, and if the built-in condition is that the PDCCH is detected on an unknown resource, the terminal detects the PDCCH at the moment; otherwise, if the built-in condition is that the PDCCH is not detected in the unknown resource, the terminal does not detect the PDCCH at the moment.
As shown in fig. 7, a unified description of the two modes a) and b) above describes, for example, what conditions the detection of PDCCH may conflict with the behavior of switching to uplink transmission. In the following three cases: two unknown resources are adjacent; the unknown resource is adjacent to the uplink resource; the downlink resource is adjacent to the unknown resource. If the terminal judges that the behavior of detecting the PDCCH conflicts with the behavior of switching to uplink transmission, the terminal behavior may be: (1) The detection of PDCCH is no longer performed (2) the terminal considers an error situation, the terminal specific behavior depends on the terminal implementation.
The base station in the embodiment of the invention indicates whether the terminal detects the PDCCH in the unknown resource or not, and the terminal determines whether to detect the PDCCH or not based on the corresponding indication, so that the problem of whether the terminal detects the PDCCH in the unknown resource or not can be solved, and the requirements of time delay and power consumption can be more flexibly adapted.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention.
Claims (13)
1. The method for detecting the physical downlink control channel PDCCH is characterized by comprising the following steps:
receiving an indication of a terminal behavior mode sent by a base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource; the indication of the terminal behavior mode sent by the base station is realized by one or more of the following modes: if the terminal is configured to be based on non-slot scheduling, the terminal detects PDCCH in the unknown resource; if the terminal is configured to receive in a discontinuous reception C-DRX transmission mode in a connected state, the terminal detects PDCCH in an unknown resource; if the terminal is configured to receive in a connected discontinuous reception, C-DRX, transmission mode, the terminal does not detect a PDCCH in the unknown resources;
and determining PDCCH detection behaviors of the terminal based on the indication.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
and the indication of the terminal behavior mode sent by the base station is born in the Radio Resource Control (RRC) signaling.
3. The method of claim 1, wherein the determining PDCCH detection behavior of the terminal comprises:
if the indication of the terminal behavior mode is not received, or the indication of the terminal behavior mode is received and the received indication is that the PDCCH is not detected in the unknown resource, the PDCCH is not detected in the unknown resource.
4. The method of claim 1, wherein the determining PDCCH detection behavior of the terminal further comprises:
and if the indication of the terminal behavior mode is received, the indication is that the terminal detects the PDCCH in the unknown resource, and the PDCCH is detected in the unknown resource.
5. The method according to claim 1, characterized in that the method further comprises:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH is determined to conflict with the behavior of switching the terminal to uplink transmission, the behavior of detecting the PDCCH is abandoned.
6. The method according to claim 1, characterized in that the method further comprises:
if the PDCCH is detected in the unknown resource and the behavior of detecting the PDCCH conflicts with the behavior of switching the terminal to uplink transmission, determining whether to detect the PDCCH or not based on preset conditions built in the terminal.
7. The method of claim 1, wherein the unknown resources include, but are not limited to, one or more of the following:
in the special high-layer signaling of the cell, the special high-layer signaling is not explicitly indicated as the downlink/uplink transmission resource;
in the user exclusive high-level signaling, the resources of downlink/uplink transmission are not explicitly indicated;
the slot format indicates the unknown transmission resources indicated in the SFI or the resources not explicitly indicated as downlink/uplink transmissions.
8. The method for detecting the physical downlink control channel PDCCH is characterized by comprising the following steps: setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource; the indication of the terminal behavior mode setting comprises the following steps: setting the terminal as non-slot-based scheduling; or, setting the terminal as receiving in the C-DRX transmission mode;
and sending the indication of the terminal behavior mode, wherein the indication is used for judging the PDCCH detection behavior of the terminal based on the indication.
9. The method of claim 8, wherein the setting an indication of the terminal behavior pattern comprises:
the indication bearer is set in radio resource control, RRC, signalling.
10. A device for detecting a physical downlink control channel PDCCH, the device comprising:
the receiving module is used for receiving the indication of the terminal behavior mode sent by the base station; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource; the indication of the terminal behavior mode sent by the base station is realized by one or more of the following modes: if the terminal is configured to be based on non-slot scheduling, the terminal detects PDCCH in the unknown resource; if the terminal is configured to receive in a discontinuous reception C-DRX transmission mode in a connected state, the terminal detects PDCCH in an unknown resource; if the terminal is configured to receive in a connected discontinuous reception, C-DRX, transmission mode, the terminal does not detect a PDCCH in the unknown resources;
and the processing module is used for determining the PDCCH detection behavior of the terminal based on the indication.
11. A device for detecting a physical downlink control channel PDCCH, the device comprising:
the setting module is used for setting an indication of a terminal behavior mode; the terminal behavior mode comprises the following steps: detecting a PDCCH in the unknown resource and/or not detecting the PDCCH in the unknown resource; the indication of the terminal behavior mode setting comprises the following steps: setting the terminal as non-slot-based scheduling; or, setting the terminal as receiving in the C-DRX transmission mode;
and the sending module is used for sending the indication of the terminal behavior mode and judging the PDCCH detection behavior of the terminal based on the indication.
12. A device for detecting a physical downlink control channel PDCCH, the device comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any of claims 1-7 or the steps of the method of any of claims 8-9 when the computer program is run.
13. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1-7 or performs the steps of the method according to any one of claims 8-9.
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