CN112888066A - PDCCH sending method, receiving method, device and node equipment - Google Patents
PDCCH sending method, receiving method, device and node equipment Download PDFInfo
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- CN112888066A CN112888066A CN201911197789.3A CN201911197789A CN112888066A CN 112888066 A CN112888066 A CN 112888066A CN 201911197789 A CN201911197789 A CN 201911197789A CN 112888066 A CN112888066 A CN 112888066A
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- H04W72/20—Control channels or signalling for resource management
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Abstract
The invention provides a sending method, a receiving method, a device and node equipment of a Physical Downlink Control Channel (PDCCH). The sending method comprises the following steps: when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side; sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH. By adopting the method, when the SMTC window at the MT side conflicts with the PDCCH monitoring opportunity at the DU side, the sending of the PDCCH at the DU side is abandoned, and the PDCCH monitoring is not carried out by the terminal through the DCI at the second PDCCH monitoring opportunity, so that the terminal is prevented from carrying out unnecessary PDCCH blind detection and causing energy waste.
Description
Technical Field
The present invention relates to the field of wireless technologies, and in particular, to a sending method, a receiving method, an apparatus, and a node device for a physical downlink control channel PDCCH.
Background
In a 5G hot spot high-capacity scene, such as a market, a square, an airport and the like, the transmission rate of downlink data can reach 300Mbps, the transmission rate of uplink data can reach 50Mbps, the transmission rate of downlink capacity can reach 750Gbps/km2, and the transmission rate of uplink capacity can reach 125Gbps/km 2; to support such high transmission rates and capacities, large bandwidths and dense deployments are required, and high frequency millimeter waves can meet this demand. Due to the limited coverage of the high-frequency millimeter waves, intensive deployment is needed, in order to reduce the dependence on optical fibers and the cost, an Integrated Access and Backhaul (IAB) technology needs to be used, and a Backhaul function is added on the basis of meeting the Access function of a base station.
A wireless communication system using an IAB technique includes:
host base station/node (IAB node): that is, the anchor point is an anchor point connected to the core network through an optical fiber, for example, as shown in fig. 1, the host base station/node (IAB node/node) may be a fifth generation evolved base station nodeb (dgnb);
IAB node (IAB node): there is no fiber connection and core network, but backhaul can be via wireless links, and nodes that can provide access functions, such as IAB1 and IAB2 in fig. 1. The IAB node includes a Mobile Termination (MT) side and a Distributed Unit (DU) side, where the MT side implements a backhaul function (may also be referred to as an MT function) of the IAB node, and the DU side implements an access function (may also be referred to as a DU function) of the IAB node.
In addition, each IAB node needs to perform discovery and Measurement between nodes, and discovery and Measurement between nodes based on a Synchronization Signal Block (SSB) are currently defined, where a window used for Measurement on the MT side is referred to as an SSB Measurement Time Configuration (SMTC) window, and a window used for transmitting an SSB on the DU side is referred to as an SSB Time Configuration (STC) window. Each SMTC and STC window requires defining parameters such as period, offset, duration, etc. The DU side of each IAB node needs to configure a Physical Downlink Control Channel (PDCCH) monitoring opportunity, including a period, an offset, a duration, and the like, for its access terminal UE.
In an IAB scenario, if an MT side of an IAB node configures an SMTC window, considering half-duplex restriction, if the MT side performs SSB reception, a DU side cannot perform transmission and reception; if the MT side does not receive the SSB, the DU side can perform transmission and reception, depending on the resource type of the DU side.
Based on the above, when an IAB node configures an SMTC window, if there is PDCCH monitoring opportunity configuration on the DU side, the terminal needs to further study whether PDCCH blind detection is required, so as to avoid the problem of terminal energy waste caused by unnecessary PDCCH blind detection.
Disclosure of Invention
The technical scheme of the invention aims to provide a sending method, a receiving method, a device and node equipment of a Physical Downlink Control Channel (PDCCH), which are used for solving the problem of energy waste caused by unnecessary PDCCH blind detection performed by a terminal when an SMTC window at an MT side of an IAB node and a PDCCH monitoring opportunity at a DU side conflict.
The invention provides a sending method of a Physical Downlink Control Channel (PDCCH), which is applied to an access backhaul integrated access node (IAB), wherein the method comprises the following steps:
when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side;
sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, in the transmission method, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the transmission method, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, in the transmission method, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side; and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
Optionally, in the sending method, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the sending method, the preset indication field includes N bits and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the sending method further includes:
and if the time domain resource of the terminal is configured as the flexible resource, sending SFI (small form-factor indication) which indicates the uplink resource or the flexible resource to the terminal at the PDCCH monitoring opportunity of which the DCI indicates that monitoring is not performed.
The invention also provides a receiving method of a physical downlink control channel PDCCH, which is applied to a terminal, wherein the method comprises the following steps:
when a measurement time configuration (SMTC) window of a Synchronous Signal (SS) or a physical broadcast channel Block (PBCH Block) at an MT side accessed to a backhaul integrated IAB node conflicts with a first PDCCH monitoring opportunity at a DU side, receiving Downlink Control Information (DCI) sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, in the transmission method, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the transmission method, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, in the transmission method, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side;
and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
Optionally, in the sending method, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the sending method, the preset indication field includes N bits and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the sending method further includes:
when the time domain resource of the terminal is configured as the downlink resource at the N PDCCH monitoring occasions indicated by the preset indication field, monitoring of the PDCCH is still executed;
when the time domain resource of the terminal is configured as the uplink resource at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
when the time domain resource of the terminal is configured as the flexible resource and the SFI indicated as the uplink resource or the flexible resource is received at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
and at the N PDCCH monitoring occasions indicated by the preset indication field, when the time domain resource of the terminal is configured as a flexible resource and the SFI indicated as the uplink resource is received or the SFI is not received, monitoring of the PDCCH is still executed.
In an aspect, the present invention further provides an access backhaul integrated IAB node device, including a transceiver, where the transceiver is configured to:
when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side;
sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
The present invention also provides, in one aspect, a terminal, including a transceiver, where the transceiver is configured to:
when a measurement time configuration (SMTC) window of a Synchronous Signal (SS) or a physical broadcast channel Block (PBCH Block) at an MT side accessed to a backhaul integrated IAB node conflicts with a first PDCCH monitoring opportunity at a DU side, receiving Downlink Control Information (DCI) sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
One aspect of the present invention further provides a sending apparatus for a physical downlink control channel PDCCH, which is applied to an access backhaul integrated IAB node, wherein the apparatus includes:
the processing module is used for abandoning the sending of the PDCCH at the DU side when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side;
a sending module, configured to send downlink control information DCI to the terminal at the second PDCCH monitoring occasion; the DCI is used for indicating the terminal not to monitor the PDCCH.
One aspect of the present invention further provides a receiving apparatus for a physical downlink control channel PDCCH, which is applied to a terminal, where the apparatus includes:
a receiving module, configured to receive downlink control information DCI sent by an IAB node at a second PDCCH monitoring opportunity when a SMTC window configured for a measurement time of a synchronization signal SS or a physical broadcast channel Block PBCH Block at an MT side of the access backhaul integrated IAB node collides with a first PDCCH monitoring opportunity at a DU side;
the DCI is used for indicating the terminal not to monitor the PDCCH.
One aspect of the present invention further provides a network device, including: a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the method of transmitting the PDCCH or implementing the method of receiving the PDCCH as described in any of the above.
An aspect of the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium has a computer program stored thereon, and the computer program, when executed by a processor, implements the steps in the method for transmitting the PDCCH or implements the steps in the method for receiving the PDCCH.
At least one of the above technical solutions of the present invention has the following beneficial effects:
by adopting the method for sending the PDCCH in the embodiment of the invention, when the SMTC window of the SS or PBCH Block at the MT side conflicts with the PDCCH monitoring time at the DU side, the sending of the PDCCH at the DU side is abandoned, and the terminal is instructed not to carry out PDCCH monitoring at the second PDCCH monitoring time through Downlink Control Information (DCI), so that the terminal is prevented from carrying out unnecessary PDCCH blind detection and causing energy waste.
Drawings
FIG. 1 is a block diagram of a wireless communication system employing a method according to an embodiment of the invention;
fig. 2 is a flowchart illustrating a method for transmitting a PDCCH according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a timeslot structure when an SMTC window at the MT side collides with an STC window at the DU side;
fig. 4 is a flowchart illustrating a PDCCH transmitting/receiving method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an IAB node device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a PDCCH transmitting apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a receiving apparatus of a PDCCH according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a network device according to another embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The sending method and the receiving method of the physical downlink control channel PDCCH are applied to a wireless communication system adopting an IAB technology. Fig. 1 is a schematic diagram of a wireless communication system adopting the method according to the embodiment of the present invention. Wherein the wireless communication system comprises:
host base station/node (IAB node): that is, an anchor point with an optical fiber connected to a core network, for example, as shown in fig. 1, in the embodiment of the present invention, an anchor base station/node (IAB node/node) is DgNB.
IAB node (IAB node): there is no fiber connection and core network, but backhaul can be via wireless links, and nodes that can provide access functions, such as IAB1 and IAB2 in fig. 1.
Wherein, a previous hop node of a certain IAB node is a parent node, for example, DgNB in fig. 1 is a parent node of IAB 1; a next hop node of a certain IAB node is a child node, for example, IAB2 in fig. 1 is a child node of IAB 1; a link between the terminal UE and the IAB node or the IAB node is an access link, and the access link includes an uplink access link and a downlink access link, such as links 1a, 2a, and 3 in fig. 1; the link between the IAB node and the IAB child node or the IAB parent node is a backhaul link, which includes an uplink backhaul link and a downlink backhaul link, such as links 1b and 2b in fig. 1.
When the system shown in fig. 1 is used for data transmission, one of the modes is Time Division Multiplexing (TDM): the MT side and the DU side of one IAB node do not receive and transmit at the same time, the MT side transmits data at one moment, and the DU side transmits data at the other moment; such as 1b and 2b, 1b and 2a, 1b and (2a and 2b) in fig. 1.
In addition, in the IAB scenario, the resource configuration of the IAB node includes the following situations:
on the MT side, the time domain resources of the mother link comprise downlink DL resources, uplink UL resources and Flexible resources;
on the DU side, the time domain resources of the sublinks include downlink DL resources, uplink UL resources, Flexible resources, and unavailable Not Available resources. For DL resources, UL resources and Flexible resources, hard resources and soft resources are divided;
wherein the Hard resource represents a resource for which the sublink is always available;
the Soft resource indicates whether the sublink is available for explicit or implicit control by the parent node.
In an IAB scenario, each IAB node needs to perform discovery and measurement between nodes, and discovery and measurement between nodes based on a Synchronization Signal (SS) or a Physical Broadcast Channel Block (PBCH Block) are defined in a standard, wherein a window used by an MT side for SSB measurement is referred to as an SMTC window, and a window used by a DU side for transmitting the SS or PBCH Block is referred to as an STC window; each SMTC and STC window requires defining parameters such as period, offset, duration, etc. The DU side of each IAB node needs to perform PDCCH monitoring opportunity configuration on its access UE, where the configuration includes period, offset, duration, and the like.
Generally, the following condition is satisfied between the slot resource allocation by the Slot Format Indicator (SFI) and the PDCCH monitoring monitor:
1) SFI cannot conflict with the direction of the semi-static configuration;
2) if the semi-static configuration resource is a Flexible resource or the semi-static configuration is absent, the UE detects the SFI, and for the PDCCH reception configured at the high layer, the PDCCH monitoring is carried out only when the SFI indicates that the resource is a DL resource; if the SFI indicates that the resource is UL resource or flexile resource, the UE does not monitor the PDCCH;
3) if the UE does not receive the SFI and no DCI indicates uplink transmission, the UE performs PDCCH monitoring.
In an IAB scene, if an MT side of an IAB node is configured with an SMTC window, if the MT side receives SSB, a DU side cannot transmit and receive; if the MT side does not receive the SSB, the DU side can perform transmission and reception, and particularly depends on the resource type of the DU side, so when an IAB node configures an SMTC window, if the DU side has PDCCH monitoring opportunity configuration, in order to avoid unnecessary PDCCH blind detection performed by the UE, the embodiment of the present invention provides a method for transmitting a PDCCH.
Specifically, as shown in fig. 2, an embodiment of a method for transmitting a PDCCH according to an embodiment of the present invention includes:
s210, when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the transmission of the PDCCH at the DU side;
s220, sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
By adopting the method for sending the PDCCH in the embodiment of the invention, when the SMTC window of the SS or PBCH Block at the MT side conflicts with the PDCCH monitoring time at the DU side, the sending of the PDCCH at the DU side is abandoned, and the terminal is instructed not to carry out PDCCH monitoring at the second PDCCH monitoring time through Downlink Control Information (DCI), so that the terminal is prevented from carrying out unnecessary PDCCH blind detection and causing energy waste.
Compared with the prior art, the method for sending the PDCCH introduces a DCI format for indicating the terminal not to monitor the PDCCH. Optionally, the terminal may be instructed not to perform PDCCH monitoring by a preset indication field in the DCI.
Further, optionally, the preset indication field in the DCI for indicating the terminal not to perform PDCCH monitoring includes N bits, and is configured to indicate the terminal not to perform PDCCH monitoring for N consecutive PDCCH monitoring occasions, where N is an integer greater than or equal to 1.
With the DCI having the above structure, it is possible to instruct, with N bits, that PDCCH monitoring is not performed at N subsequent PDCCH monitoring occasions, and a multi-slot joint instruction format is used.
In this embodiment of the present invention, optionally, in step S220, the second PDCCH monitoring occasion for sending DCI is the closest PDCCH monitoring occasion to the first PDCCH monitoring occasion, so as to ensure that DCI that indicates the terminal not to perform PDCCH monitoring can be timely and effectively sent to the terminal.
Optionally, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side; and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
The second PDCCH monitoring occasion satisfying any of the above conditions ensures that DCI for instructing the terminal not to perform PDCCH monitoring can be timely and effectively received by the terminal.
Further, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
It should be noted that, according to a general processing rule, in the embodiment, if the time domain resource of the terminal is configured as the downlink DL resource at the first PDCCH monitoring occasion, the UE needs to detect the PDCCH no matter the DU side sends the PDCCH, which results in energy waste; by adopting the method of the embodiment of the invention, when the SMTC window at the MT side conflicts with the first PDCCH monitoring opportunity at the DU side and the time domain resource of the terminal is configured as the DL resource, the DU side does not send the PDCCH, and at the second PDCCH monitoring opportunity, DCI which indicates that the PDCCH monitoring is not carried out is sent to the terminal so as to indicate that the terminal does not carry out the PDCCH detection, thereby avoiding the energy waste caused by the blind detection of the PDCCH;
in another embodiment, according to a general processing rule, if the time domain resource of the terminal is configured as a Flexible resource at the first PDCCH monitoring occasion, the UL resource or the Flexible resource may be indicated by SFI, but if the terminal does not normally receive the SFI, the UE still needs to detect the PDCCH, which may cause waste; by adopting the method of the embodiment of the invention, when the SMTC window at the MT side conflicts with the first PDCCH monitoring opportunity at the DU side and the time domain resource of the terminal is configured as the Flexible resource, the DU side does not send the PDCCH, and the DCI indicating that the PDCCH monitoring is not carried out is sent to the terminal at the second PDCCH monitoring opportunity so as to indicate the terminal not to carry out the PDCCH detection, thereby avoiding the energy waste caused by the blind detection of the PDCCH.
In this embodiment of the present invention, after step S220, the method further includes:
and if the time domain resource of the terminal is configured as the flexible resource, sending SFI (small form-factor indication) which indicates the uplink resource or the flexible resource to the terminal at the PDCCH monitoring opportunity of which the DCI indicates that monitoring is not performed.
Fig. 3 is a schematic diagram illustrating a timeslot structure when an SMTC window on the MT side collides with an STC window (i.e., a first PDCCH monitoring opportunity) on the DU side. According to fig. 3, when the SMTC window of the MT side collides with the first PDCCH monitoring opportunity, the PDCCH is Not transmitted on the DU side regardless of whether the configuration resource of the DU side is an unavailable Not Available resource, a soft resource, or a hard resource.
Under the condition that the DU side does not send the PDCCH, if the time domain of the UE is configured as DL resource, the terminal still needs to detect the PDCCH; if the time domain resource of the UE is configured as the UL resource, the terminal does not need to detect the PDCCH; if the time domain resource of the UE is configured as a flexible resource, if the SFI indication is an uplink UL resource or a flexible resource, the PDCCH does not need to be detected; if the SFI indicates downlink resources or the SFI is not received, the terminal still needs to detect the PDCCH. Therefore, when the DU side does not transmit the PDCCH and the time domain resource of the terminal is configured as the flexible resource, by transmitting the SFI indicating the uplink resource or the flexible resource to the terminal, the terminal can be prevented from further detecting the PDCCH, and the purpose of saving energy is achieved.
An embodiment of the present invention further provides a receiving method of a PDCCH, which is applied to a terminal, and as shown in fig. 4, the method includes:
s410, when a measurement time configuration SMTC window of an MT side of an access backhaul integrated IAB node or a physical broadcast channel Block PBCH Block conflicts with a first PDCCH monitoring opportunity at a DU side, receiving downlink control information DCI sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
By adopting the receiving method of the PDCCH in the embodiment of the invention, when the SMTC window of the SS or PBCH Block at the MT side conflicts with the PDCCH monitoring time at the DU side, the IAB gives up the sending of the PDCCH at the DU side, and the terminal is indicated not to carry out PDCCH monitoring through Downlink Control Information (DCI) at the second PDCCH monitoring time, so as to avoid the terminal from carrying out unnecessary PDCCH blind detection and causing energy waste.
In the receiving method of the PDCCH according to the embodiment of the present invention, optionally, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
In one embodiment, according to a general processing rule, when a time domain resource of a terminal is configured as a downlink DL resource at a first PDCCH monitoring occasion, no matter a DU side sends a PDCCH, a UE needs to detect the PDCCH, thereby causing energy waste; by adopting the method of the embodiment of the invention, when the SMTC window at the MT side conflicts with the first PDCCH monitoring opportunity at the DU side and the time domain resource of the terminal is configured as the DL resource, the DU side does not send the PDCCH, and at the second PDCCH monitoring opportunity, DCI which indicates that the PDCCH monitoring is not carried out is sent to the terminal so as to indicate that the terminal does not carry out the PDCCH detection, thereby avoiding the energy waste caused by the blind detection of the PDCCH;
in another embodiment, according to a general processing rule, if the time domain resource of the terminal is configured as a Flexible resource at the first PDCCH monitoring occasion, the SFI may indicate the UL resource or the Flexible resource, but if the terminal does not normally receive the SFI, the UE still needs to detect the PDCCH, which may cause waste; by adopting the method of the embodiment of the invention, when the SMTC window at the MT side conflicts with the first PDCCH monitoring opportunity at the DU side and the time domain resource of the terminal is configured as a Flexible resource, the DU side does not send the PDCCH, and the DCI indicating that the PDCCH monitoring is not carried out is sent to the terminal at the second PDCCH monitoring opportunity so as to indicate the terminal not to carry out the PDCCH detection, thereby avoiding the energy waste caused by the blind detection of the PDCCH.
In the PDCCH receiving method according to the embodiment of the present invention, optionally, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
In the receiving method of the PDCCH according to the embodiment of the present invention, optionally, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side;
and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
The second PDCCH monitoring occasion satisfying any of the above conditions ensures that DCI for instructing the terminal not to perform PDCCH monitoring can be timely and effectively received by the terminal.
In the receiving method of the PDCCH according to the embodiment of the present invention, optionally, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
In the receiving method of the PDCCH according to the embodiment of the present invention, optionally, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
With the DCI having the above structure, it is possible to instruct, with N bits, that PDCCH monitoring is not performed at N subsequent PDCCH monitoring occasions, and a multi-slot joint instruction format is used.
In the receiving method of the PDCCH according to the embodiment of the present invention, optionally, the method further includes:
when the time domain resource of the terminal is configured as the downlink resource at the N PDCCH monitoring occasions indicated by the preset indication field, monitoring of the PDCCH is still executed;
when the time domain resource of the terminal is configured as the uplink resource at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
when the time domain resource of the terminal is configured as the flexible resource and the SFI indicated as the uplink resource or the flexible resource is received at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
and at the N PDCCH monitoring occasions indicated by the preset indication field, when the time domain resource of the terminal is configured as a flexible resource and the SFI indicated as the uplink resource is received or the SFI is not received, monitoring of the PDCCH is still executed.
An embodiment of the present invention further provides an access backhaul integrated IAB node device, as shown in fig. 5, including a transceiver 510, where the transceiver 510 is configured to:
when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side;
sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, the IAB node device, wherein the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, the IAB node device, wherein the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the latest PDCCH monitoring occasion of the first PDCCH monitoring occasion.
Optionally, the IAB node device, wherein the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side; and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource. Optionally, in the IAB node device, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the IAB node device, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the IAB node device, wherein the transceiver 510 is further configured to:
and if the time domain resource of the terminal is configured as the flexible resource, sending SFI (small form-factor indication) which indicates the uplink resource or the flexible resource to the terminal at the PDCCH monitoring opportunity of which the DCI indicates that monitoring is not performed.
An embodiment of the present invention further provides a terminal, as shown in fig. 6, including a transceiver 610 configured to:
when a measurement time configuration (SMTC) window of a Synchronous Signal (SS) or a physical broadcast channel Block (PBCH Block) at an MT side accessed to a backhaul integrated IAB node conflicts with a first PDCCH monitoring opportunity at a DU side, receiving Downlink Control Information (DCI) sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, in the terminal, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the terminal, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, in the terminal, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side;
and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
Optionally, in the terminal, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the terminal, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the terminal further includes a processor 620, configured to:
when the time domain resource of the terminal is configured as the downlink resource at the N PDCCH monitoring occasions indicated by the preset indication field, monitoring of the PDCCH is still executed;
when the time domain resource of the terminal is configured as the uplink resource at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
when the time domain resource of the terminal is configured as the flexible resource and the SFI indicated as the uplink resource or the flexible resource is received at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
and at the N PDCCH monitoring occasions indicated by the preset indication field, when the time domain resource of the terminal is configured as a flexible resource and the SFI indicated as the uplink resource is received or the SFI is not received, monitoring of the PDCCH is still executed.
An embodiment of the present invention further provides a sending apparatus for a physical downlink control channel PDCCH, which is applied to an access backhaul integrated IAB node, and as shown in fig. 7, the apparatus includes:
a processing module 710, configured to, when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window on the MT side collides with a first PDCCH monitoring opportunity on the DU side, abandon the transmission of the PDCCH on the DU side;
a sending module 720, configured to send downlink control information DCI to the terminal at the second PDCCH monitoring occasion; the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, the transmitting apparatus, wherein the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the transmitting apparatus, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, the transmitting apparatus, wherein the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side; and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource. Optionally, in the transmitting apparatus, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the sending apparatus, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the sending apparatus, wherein the sending module 720 is further configured to:
and if the time domain resource of the terminal is configured as the flexible resource, sending SFI (small form-factor indication) which indicates the uplink resource or the flexible resource to the terminal at the PDCCH monitoring opportunity of which the DCI indicates that monitoring is not performed.
An embodiment of the present invention further provides a receiving apparatus for a physical downlink control channel PDCCH, which is applied to a terminal, and as shown in fig. 8, the apparatus includes:
a receiving module 810, configured to receive downlink control information DCI sent by an IAB node at a second PDCCH monitoring opportunity when a measurement time configuration SMTC window of an MT side accessing a backhaul integrated IAB node or a physical broadcast channel Block PBCH Block collides with a first PDCCH monitoring opportunity at a DU side;
the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, the receiving apparatus, wherein the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the receiving apparatus, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, the receiving apparatus, wherein the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side;
and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
Optionally, in the receiving apparatus, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the receiving apparatus, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the receiving apparatus, wherein the apparatus further includes a monitoring module 820, configured to:
when the time domain resource of the terminal is configured as the downlink resource at the N PDCCH monitoring occasions indicated by the preset indication field, monitoring of the PDCCH is still executed;
when the time domain resource of the terminal is configured as the uplink resource at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
when the time domain resource of the terminal is configured as the flexible resource and the SFI indicated as the uplink resource or the flexible resource is received at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
and at the N PDCCH monitoring occasions indicated by the preset indication field, when the time domain resource of the terminal is configured as a flexible resource and the SFI indicated as the uplink resource is received or the SFI is not received, monitoring of the PDCCH is still executed.
Another aspect of the embodiments of the present invention further provides a network device, where the network device is an access backhaul integrated IAB node, as shown in fig. 9, the network device includes: a processor 901; and a memory 903 connected to the processor 901 through a bus interface 902, where the memory 903 is used to store programs and data used by the processor 901 during operation, and the processor 901 calls and executes the programs and data stored in the memory 903.
The transceiver 904 is connected to the bus interface 902, and is configured to receive and transmit data under the control of the processor 901, specifically, the processor 901 is configured to read a program in the memory 903, and execute the following processes:
when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side;
sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, in the network device, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the network device, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, in the network device, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side; and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource. Optionally, in the network device, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the network device, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, in the network device, the processor 901 is further configured to:
and if the time domain resource of the terminal is configured as the flexible resource, sending SFI (small form-factor indication) which indicates the uplink resource or the flexible resource to the terminal at the PDCCH monitoring opportunity of which the DCI indicates that monitoring is not performed.
Where in fig. 9 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by the processor 901 and various circuits of the memory represented by the memory 903, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 904 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.
Another aspect of the embodiments of the present invention further provides a network device, where the network device is a terminal, as shown in fig. 10, and the network device includes: a processor 1001; and a memory 1003 connected to the processor 1001 through a bus interface 1002, wherein the memory 1003 is used for storing programs and data used by the processor 1001 when executing operations, and the processor 1001 calls and executes the programs and data stored in the memory 1003.
The transceiver 1004 is connected to the bus interface 1002, and is configured to receive and transmit data under the control of the processor 1001, and specifically, the processor 1001 is configured to read a program in the memory 1003 and execute the following processes:
when a measurement time configuration (SMTC) window of a Synchronous Signal (SS) or a physical broadcast channel Block (PBCH Block) at an MT side accessed to a backhaul integrated IAB node conflicts with a first PDCCH monitoring opportunity at a DU side, receiving Downlink Control Information (DCI) sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
Optionally, in the network device, the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
Optionally, in the network device, the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
Optionally, in the network device, the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side;
and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
Optionally, in the network device, the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
Optionally, in the network device, the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
Optionally, the network device, wherein the method further includes:
when the time domain resource of the terminal is configured as the downlink resource at the N PDCCH monitoring occasions indicated by the preset indication field, monitoring of the PDCCH is still executed;
when the time domain resource of the terminal is configured as the uplink resource at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
when the time domain resource of the terminal is configured as the flexible resource and the SFI indicated as the uplink resource or the flexible resource is received at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
and at the N PDCCH monitoring occasions indicated by the preset indication field, when the time domain resource of the terminal is configured as a flexible resource and the SFI indicated as the uplink resource is received or the SFI is not received, monitoring of the PDCCH is still executed.
It should be noted that in fig. 10, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1001 and various circuits of memory represented by memory 1003 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1004 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 1005 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 1001 is responsible for managing a bus architecture and general processes, and the memory 1003 may store data used by the processor 1001 in performing operations.
Those skilled in the art will understand that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program includes instructions for executing part or all of the steps of the above methods; and the program may be stored in a readable storage medium, which may be any form of storage medium.
In addition, a computer-readable storage medium is provided, on which a computer program is stored, wherein the program, when executed by a processor, implements the steps in the method for transmitting a PDCCH or the method for receiving a PDCCH as described in any of the above.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (20)
1. A sending method of a Physical Downlink Control Channel (PDCCH) is applied to an access backhaul integrated access node (IAB), and is characterized by comprising the following steps:
when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side;
sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
2. The transmission method of claim 1, wherein the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
3. The transmission method of claim 1, wherein the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
4. The transmission method of any one of claims 1 to 3, wherein the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side; and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
5. The sending method of claim 1, wherein the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
6. The sending method of claim 5, wherein the preset indication field comprises N bits and is used for indicating that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
7. The transmission method of claim 1, further comprising:
and if the time domain resource of the terminal is configured as the flexible resource, sending SFI (small form-factor indication) which indicates the uplink resource or the flexible resource to the terminal at the PDCCH monitoring opportunity of which the DCI indicates that monitoring is not performed.
8. A receiving method of a Physical Downlink Control Channel (PDCCH) is applied to a terminal, and is characterized by comprising the following steps:
when a measurement time configuration (SMTC) window of a Synchronous Signal (SS) or a physical broadcast channel Block (PBCH Block) at an MT side accessed to a backhaul integrated IAB node conflicts with a first PDCCH monitoring opportunity at a DU side, receiving Downlink Control Information (DCI) sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
9. The receiving method of claim 8, wherein the first PDCCH monitoring occasion satisfies one of the following conditions:
the time domain resource of the terminal is configured as a downlink resource;
the time domain resources of the terminal are configured as flexible resources.
10. The receiving method of claim 8, wherein the second PDCCH monitoring occasion is a PDCCH monitoring occasion that is the closest to the first PDCCH monitoring occasion.
11. The receiving method according to any of claims 8 to 10, wherein the second PDCCH monitoring occasion satisfies one of the following conditions:
time domain resources of a terminal are configured as downlink resources, and the IAB node sends a PDCCH on a DU side;
and the time domain resource of the terminal is configured as a flexible resource, the IAB node sends the PDCCH on the DU side, and the time slot format sent to the terminal indicates that the SFI is a downlink resource.
12. The receiving method according to claim 8, wherein the DCI indicates, through a preset indication field, that the terminal does not perform PDCCH monitoring.
13. The receiving method according to claim 12, wherein the preset indication field includes N bits, and is used to indicate that the terminal does not perform PDCCH monitoring for N consecutive PDCCH monitoring occasions; wherein N is an integer greater than or equal to 1.
14. The receiving method according to claim 13, characterized in that the method further comprises:
when the time domain resource of the terminal is configured as the downlink resource at the N PDCCH monitoring occasions indicated by the preset indication field, monitoring of the PDCCH is still executed;
when the time domain resource of the terminal is configured as the uplink resource at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
when the time domain resource of the terminal is configured as the flexible resource and the SFI indicated as the uplink resource or the flexible resource is received at the N PDCCH monitoring occasions indicated by the preset indication field, not executing the monitoring of the PDCCH;
and at the N PDCCH monitoring occasions indicated by the preset indication field, when the time domain resource of the terminal is configured as a flexible resource and the SFI indicated as the uplink resource is received or the SFI is not received, monitoring of the PDCCH is still executed.
15. An access backhaul integrated IAB node device, comprising a transceiver, wherein the transceiver is configured to:
when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side, abandoning the sending of the PDCCH at the DU side;
sending Downlink Control Information (DCI) to the terminal at a second PDCCH monitoring opportunity; the DCI is used for indicating the terminal not to monitor the PDCCH.
16. A terminal comprising a transceiver, wherein the transceiver is configured to:
when a measurement time configuration (SMTC) window of a Synchronous Signal (SS) or a physical broadcast channel Block (PBCH Block) at an MT side accessed to a backhaul integrated IAB node conflicts with a first PDCCH monitoring opportunity at a DU side, receiving Downlink Control Information (DCI) sent by the IAB node at a second PDCCH monitoring opportunity;
the DCI is used for indicating the terminal not to monitor the PDCCH.
17. A sending device of a Physical Downlink Control Channel (PDCCH) is applied to an access backhaul integrated access node (IAB), and the device is characterized by comprising:
the processing module is used for abandoning the sending of the PDCCH at the DU side when a synchronization signal SS or a physical broadcast channel Block PBCH Block measurement time configuration SMTC window at the MT side conflicts with a first PDCCH monitoring opportunity at the DU side;
a sending module, configured to send downlink control information DCI to the terminal at the second PDCCH monitoring occasion; the DCI is used for indicating the terminal not to monitor the PDCCH.
18. A receiving device of a Physical Downlink Control Channel (PDCCH) is applied to a terminal, and the device comprises:
a receiving module, configured to receive downlink control information DCI sent by an IAB node at a second PDCCH monitoring opportunity when a SMTC window configured for a measurement time of a synchronization signal SS or a physical broadcast channel Block PBCH Block at an MT side of the access backhaul integrated IAB node collides with a first PDCCH monitoring opportunity at a DU side;
the DCI is used for indicating the terminal not to monitor the PDCCH.
19. A network device, comprising: a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing a method of transmitting the PDCCH according to any one of claims 1 to 7 or implementing a method of receiving the PDCCH according to any one of claims 8 to 14.
20. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processor, carries out the steps in the method for transmitting a PDCCH according to any one of claims 1 to 7 or the steps in the method for receiving a PDCCH according to any one of claims 8 to 14.
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