CN114978423A - Method and equipment for detecting downlink control signaling - Google Patents
Method and equipment for detecting downlink control signaling Download PDFInfo
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- H—ELECTRICITY
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- H04L1/0038—Blind format detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
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- H—ELECTRICITY
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Abstract
The application discloses a downlink control signaling detection method. A method for detecting downlink control signaling at least comprises one of the following steps: a downlink control signaling for indicating aperiodic PDCCH resources; and the downlink control signaling or the MAC CE is used for activating or deactivating the search space for detecting the PDCCH. The application also includes a device applying the method. The method solves the problem that the existing method is not suitable for aperiodic PDCCH resource blind detection, and is particularly suitable for a 5G communication system.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method and a device for detecting a downlink control signaling.
Background
In the existing 5G NR (New Radio, New air interface) design, a terminal detects Downlink Control signaling (DCI), determines a PDCCH (Physical Downlink Control Channel) resource location for detecting DCI based on predefined or high-level configuration in a defined Control resource set (CORESET) and a search space (SearchSpace), and then performs blind detection. At present, DCI detection only supports periodic blind detection, a terminal needs to continuously perform blind detection on indicated periodic candidate PDCCH resources according to high-level signaling indication, large DCI blind detection overhead of the terminal is introduced, and flexibility of the blind detection PDCCH resources is limited. When a terminal needs to increase a PDCCH detection opportunity, a configuration search space needs to be increased, or a configuration candidate PDCCH needs to be increased in a corresponding search space, that is, RRC (Radio Resource Control) signaling overhead is needed to indicate new PDCCH detection related configuration. Actually, downlink transmission data of the terminal has periodic and aperiodic characteristics, and the conventional system does not support aperiodic PDCCH resource indication, which is not beneficial to reducing the equipment overhead of terminal blind detection DCI.
Disclosure of Invention
The application provides a method and equipment for detecting a downlink control signaling, which solve the problem that the existing method is not suitable for aperiodic PDCCH resource blind detection, and are particularly suitable for a 5G communication system.
In a first aspect, the present application provides a method for detecting a downlink control signaling, which at least includes one of the following steps: a downlink control signaling for indicating aperiodic PDCCH resources; a downlink Control signaling or a MAC CE (Media Access Control Element, MAC CE) for activating or deactivating a search space for detecting a PDCCH.
Preferably, the downlink control signaling is used to indicate aperiodic PDCCH resources in a manner of: and indicating resource configuration information of a second downlink control signaling through a first downlink control signaling, wherein the second downlink signaling is a downlink control signaling detected by the first downlink signaling indication, and the aperiodic PDCCH resource bears the second downlink control signaling indicated by the first downlink control signaling.
Preferably, if the higher-layer configuration search space at least includes a first PDCCH set, the search space ID is indicated through a third downlink control signaling or in an MAC CE, and the PDCCH ID in the first PDCCH set is activated or deactivated; the first PDCCH set is a candidate PDCCH set which needs to be activated by downlink control signaling or MAC CE signaling to be effective.
Preferably, if the search space configured by the higher layer at least includes the first search space set, activating or deactivating the search space ID is indicated in the third downlink control signaling or the MAC CE, and the first search space set is a candidate search space set that is activated only by the third downlink control signaling or the MAC CE signaling.
Preferably, the resource configuration information of the second downlink control signaling at least includes one of: a time-frequency resource position where the second downlink Control signaling is located, a format of the second downlink Control signaling, a CCE (Control Channel Element) aggregation level corresponding to the second downlink Control signaling, an MCS (Modulation and Coding Scheme) level corresponding to the second downlink Control signaling, and a Radio Network Temporary Identity (RNTI) corresponding to the second downlink Control signaling.
Further, if the first downlink control signaling is a terminal-specific downlink control signaling, the first downlink control signaling is used to indicate a downlink data channel resource and simultaneously indicate the second downlink control signaling.
Further, if the first downlink control signaling is a cell common downlink control signaling, the second downlink control signaling is also a cell common downlink control signaling.
Further, the first downlink control signaling is used to indicate that the terminal performs blind detection on the candidate PDCCH configuration on the PDCCH resource corresponding to the next downlink control signaling after the first downlink control signaling.
Further, if the first downlink control signaling indicates that a time slot in which the second downlink control signaling is located is the same as a time slot of a blind candidate PDCCH resource corresponding to a search space, when the candidate PDCCH corresponding to the search space is blind-detected, the downlink control signaling is blind-detected only on the candidate PDCCH resource whose resource position corresponding to the second downlink control signaling does not overlap.
Further, the first downlink control signaling is further configured to indicate configuration information for designating blind detection of PDCCH resources in a search space.
Preferably, the third downlink control signaling or an indication in the MAC CE activates at least one of the following search spaces: aggregation level of candidate PDCCH, PDCCH ID, detection RNTI.
Preferably, the higher layer search space configuration is changed by the third downlink control signaling or the MAC CE.
Preferably, the validation time for activating the candidate PDCCH in the search space or the validation time for activating the search space is indicated by the third downlink control signaling or the MAC CE.
Preferably, the time-frequency resource location where the second downlink control signaling indicated by the first downlink control signaling is located is obtained according to a function that determines the frequency-domain CCE index where the candidate PDCCH is located in a search space corresponding to the PDCCH resource of the next blind-check downlink control signaling after the first downlink control signaling.
Preferably, a slot offset is indicated in the first downlink control signaling, and the time domain resource location where the second controllable signaling is located is determined by the slot offset.
Preferably, a specific information field is adopted in the first downlink control signaling to explicitly indicate the format of the second downlink control signaling, and if the information field does not indicate the format of the second downlink control signaling is the same as the format of the first downlink control signaling.
Preferably, a specific information field is adopted in the first downlink control signaling to explicitly indicate the CCE aggregation level corresponding to the second downlink control signaling, and if the information field is not indicated, the CCE aggregation level corresponding to the second downlink control signaling is the same as the CCE aggregation level corresponding to the first downlink control signaling.
Furthermore, a specific information field is adopted in the first downlink control signaling to explicitly indicate the MCS level corresponding to the second downlink control signaling, and if the information field does not indicate the MCS level corresponding to the second downlink control signaling is the same as the MCS level corresponding to the first downlink control signaling.
Furthermore, a specific information field is adopted in the first downlink control signaling to explicitly indicate the RNTI corresponding to the second downlink control signaling, and if the information field does not indicate the RNTI corresponding to the second downlink control signaling is the same as the RNTI corresponding to the first downlink control signaling.
Further, the configuration information of the candidate PDCCH resource in the designated search space is added or deleted through the third downlink control signaling or the MAC CE.
Further, a designated search space is added or deleted by the third downlink control signaling or the MAC CE.
Further, the method for detecting the downlink control signaling is used for a network device, and comprises the following steps: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and sending downlink control signaling indicating aperiodic PDCCH resources and/or activating or deactivating the downlink control signaling or MAC CE for detecting the search space of the PDCCH to the terminal equipment.
Further, the method for detecting the downlink control signaling is used for a terminal device, and comprises the following steps: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; receiving a downlink control signaling indicating aperiodic PDCCH resource sent by network equipment, and/or activating or deactivating the downlink control signaling or MAC CE for detecting a search space of the PDCCH.
In a second aspect, the present application further provides a network device, and with the method in any of the first aspects of the present application, the downlink control signaling detects at least one module in the network device, where the at least one module is configured to perform at least one of the following functions: the downlink control signaling detection network device comprises at least one module for at least one of the following functions: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and sending downlink control signaling or MAC CE.
In a third aspect, the present application further provides a terminal device, where with the method in any of the first aspects of the present application, the downlink control signaling detects at least one module in the terminal device, where the at least one module is configured to perform at least one of the following functions: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and receiving and detecting the downlink control signaling or the MAC CE.
The present application further proposes a communication device comprising: memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of the embodiments of the first aspect of the application.
The present application also proposes a computer-readable medium on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the first aspect of the present application.
The present application further proposes a mobile communication system comprising at least one network device according to any of the embodiments of the present application and/or at least one terminal device according to any of the embodiments of the present application.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the invention provides a downlink control signaling detection method, which can indicate aperiodic PDCCH detection resources aiming at aperiodic downlink data transmission, reduce PDCCH blind detection overhead at a terminal side and improve DCI blind detection efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic diagram of a periodic PDCCH blind detection;
FIG. 2(a) is a flow chart of an embodiment of the method of the present application;
fig. 2(b) is a schematic diagram of a second DCI time domain location according to an embodiment of the method of the present application;
FIG. 2(c) is a schematic diagram of a PDCCH candidate configuration according to an embodiment of the present invention;
FIG. 2(d) is a schematic diagram of another PDCCH candidate configuration according to an embodiment of the present invention;
FIG. 3 is a flowchart of an embodiment of a method of the present application for a network device;
FIG. 4 is a flowchart illustrating an embodiment of a method for a terminal device according to the present application;
FIG. 5 is a schematic diagram of an embodiment of a network device;
FIG. 6 is a schematic diagram of an embodiment of a terminal device;
fig. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention;
fig. 8 is a block diagram of a terminal device of another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a periodic PDCCH blind detection, which can be used to illustrate how PDCCH blind detection is performed in the prior art.
In the existing 5G NR design, a terminal detects downlink control signaling, determines the PDCCH resource location for detecting DCI mainly based on predefined or high-level configuration in a defined control resource set (CORESET) and a search space (SearchSpace), and then performs blind detection. The resource position occupied by the CCE frequency domain of the detection PDCCH is agreed by CORESET, the information of the resource position occupied by the CCE periodic time domain of the detection PDCCH, the number of the candidate PDCCHs, the CCE aggregation level of the candidate PDCCHs, the DCI format of the candidate detection and the like is agreed by SearchSpace, and the specific indication content is shown in the following table.
Table 1 search space high level signaling indication content
The terminal determines the resource position of the periodic blind detection PDCCH according to the configuration of the search space and the COESET, determines the CCE index of the candidate PDCCH needing the blind detection, determines the DCI format carried by the PDCCH needing the blind detection, further determines the successfully detected DCI through the DCI format indication in the detection data passing the CRC check, and identifies the information content carried in the DCI according to the DCI format predefined by the system. For example, as shown in fig. 1, the PDCCH detection period is 10slots (10slots), assuming that the number of PDCCH candidates having an aggregation level of 2(L ═ 2) is 3, that is, PDCCH candidates 1, 2, and PDCCH candidates 3 in the search space, and the number of PDCCH candidates having an aggregation level of 4(L ═ 4) is 1, that is, PDCCH candidates 4 in the figure, the location of a search RB (resource block) corresponding to the CCE index is further determined based on the CCE index corresponding to each PDCCH candidate determined by the search space function, and the corresponding DCI format is detected at the corresponding search RB location according to the data amount size of the DCI format requiring blind detection (blind detection DCI format 0_0/0_1/1_0/1_ 1).
At present, DCI detection only supports periodic blind detection, a terminal needs to continuously perform blind detection on indicated periodic candidate PDCCH resources according to high-level signaling indication, large DCI blind detection overhead of the terminal is introduced, and flexibility of the blind detection of the PDCCH resources is limited. When a terminal needs to increase a PDCCH detection opportunity, a configuration search space needs to be increased, or a configuration candidate PDCCH needs to be increased in a corresponding search space, that is, RRC signaling overhead is needed to indicate new PDCCH detection related configuration. If the search space configuration is increased, this means that the terminal needs to increase the periodic PDCCH candidate detection. Actually, the terminal downlink transmission data has periodic and aperiodic characteristics, and a periodic SPS resource may be configured for periodic data transmission, or a corresponding data resource may be scheduled through a periodic PDCCH, where periodic PDCCH detection is required. And for aperiodic data, the scheduling can be performed through an aperiodic PDCCH or a periodic PDCCH in a period of time. However, the existing detection method does not support aperiodic PDCCH resource indication, which is not beneficial to reducing the equipment overhead of terminal blind detection DCI.
Fig. 2(a) is a flowchart of an embodiment of the method of the present application, fig. 2(b) is a schematic diagram of a time domain location of a second DCI of the embodiment of the method of the present application, fig. 2(c) is a schematic diagram of a PDCCH candidate configuration of the embodiment of the method of the present application, and fig. 2(d) is a schematic diagram of another PDCCH candidate configuration of the embodiment of the method of the present application.
A downlink control signaling detection method specifically comprises the following steps 101-102:
step 101, downlink control signaling, configured to indicate aperiodic PDCCH resources.
In step 101, aperiodic PDCCH resource detection is implemented by indicating resource configuration information of a second downlink control signaling through a first downlink control signaling. The second downlink signaling is a downlink control signaling detected by a first downlink signaling indication, and the aperiodic PDCCH resource carries the second downlink control signaling indicated by the first downlink control signaling.
It should be noted that the first downlink control signaling may be carried through a periodic PDCCH resource or may be carried through an aperiodic PDCCH resource. The periodic PDCCH resource is configured through a high layer, and the aperiodic PDCCH resource may be indicated through other downlink control signaling.
In step 101, the resource configuration information of the second downlink control signaling includes, but is not limited to, at least one of the following: the position of a time-frequency resource where the second downlink control signaling is located, the format of the second downlink control signaling, the CCE aggregation level corresponding to the second downlink control signaling, the MCS level corresponding to the second downlink control signaling, and the RNTI corresponding to the second downlink control signaling are detected.
Preferably, the manner of indicating the time domain resource location of the second downlink control signaling may be to indicate a time slot offset in the first downlink control signaling, and determine the time slot location of the second downlink control signaling through the time slot offset, where a specific symbol location in the time slot location of the second downlink control signaling may be the same as a symbol location of the first downlink control signaling in the time slot.
As shown in fig. 2(b), the first downlink control signaling (first DCI) indicates that the slot offset of the slot position of the second downlink control signaling (second DCI) is Koffset, and assuming that the slot position of the first downlink control signaling is n, the slot position of the second downlink control signaling is n + Koffset. Similarly, in analogy, the second downlink control signaling may carry a slot offset indicating a slot position where the fourth downlink control signaling (fourth DCI) is located.
It should be noted that the fourth downlink control signaling is a downlink control signaling that is indicated and detected by the second downlink control signaling, the second downlink control signaling indicates resource configuration information of the fourth downlink control signaling, and a manner in which the second downlink control signaling indicates the fourth downlink control signaling is the same as a manner in which the first downlink control signaling indicates the second downlink control signaling.
Preferably, the manner of indicating the signaling format of the second downlink control signaling may be to explicitly indicate the signaling format by using a specific information field in the first downlink control signaling, and if the information field has no indication, the signaling formats detected in the first downlink control signaling are the same.
Preferably, the manner of indicating the CCE aggregation level corresponding to the second downlink control signaling may be to explicitly indicate the aggregation level by using a specific information field in the first downlink control signaling, and if the information field does not indicate, detect that the corresponding CCE aggregation levels in the first downlink control signaling are the same.
Preferably, the MCS level corresponding to the second downlink control signaling may be indicated by using a specific information field explicitly in the first downlink control signaling, and if the information field does not indicate, the MCS levels detected in the first downlink control signaling are the same.
Preferably, the manner of indicating the RNTI corresponding to the second downlink control signaling may be to explicitly indicate the RNTI information in the first downlink control signaling by using a specific information field, and if the information field does not indicate, the corresponding RNTIs detected in the first downlink control signaling are the same.
In step 101, if the first downlink control signaling is a terminal-specific downlink control signaling, the first downlink control signaling indicates resource allocation of the second downlink control signaling when indicating downlink data channel resources, and at this time, the second downlink control signaling is also a terminal-specific downlink control signaling. And if the first downlink control signaling is cell public downlink control signaling, the second downlink control signaling is also cell public downlink control signaling.
In step 101, to reduce the UE blind detection overhead, the first downlink control signaling may indicate a candidate PDCCH configuration on a PDCCH resource of a next blind detection DCI after the first downlink control signaling.
As shown in fig. 2(c), it is assumed that PDCCH resources of the next blind-check DCI after the first downlink control signaling correspond to a PDCCH candidate configuration corresponding to a search space ID of 1, where the next blind-check DCI after the first downlink control signaling corresponds to the second DCI in the figure, the CORESET corresponding to the search space ID of 1 includes 8 CCEs, two PDCCH candidates having an aggregation level L of 2 are PDCCH candidates 1 and PDCCH candidate 2, and two PDCCH candidates having an aggregation level L of 4 are PDCCH candidate 3 and PDCCH candidate 4. Assuming that CCE indexes of PDCCH candidates 1 and 2 are determined to be 2-3 and 6-7, respectively, according to the search space function, CCE indexes of PDCCH candidates 3 and 4 are 0-3 and 4-7, respectively.
And the first downlink control signaling indicates information such as the aggregation level, the PDCCH ID and the like of the next blind detection DCI. For example, if it is indicated that the next blind DCI aggregation level information is 2, it indicates that the first downlink control signaling indicates that the UE blindly detects candidate PDCCHs corresponding to the aggregation level L of 2, i.e., blind candidate PDCCH1 and candidate PDCCH2, in the search space ID of 1 after the first downlink control signaling, without blindly detecting candidate PDCCH3 and candidate PDCCH 4. If it is indicated that the PDCCH ID corresponding to the next blind DCI is 1, it indicates that the first downlink control signaling indicates the 1 st PDCCH, i.e., PDCCH candidate 1, in the corresponding PDCCH candidate set { PDCCH1, PDCCH candidate 2, PDCCH candidate 3, PDCCH candidate 4} in which the UE blindly detects the search space ID after the first DCI is 1. The method for determining the order of the candidate PDCCHs in the candidate PDCCH set corresponding to one search space comprises the following steps: the aggregation levels are sorted from small to large, and the PDCCH indexes under the same aggregation level are sorted from small to large. The network determines that the PDCCH resource position corresponding to the next blind-check DCI of the first downlink control signaling requires that the time interval between the first downlink control signaling and the PDCCH resource position corresponding to the next blind-check DCI is not less than one Tgap. Wherein Tgap is a preset time interval threshold.
Optionally, the first downlink control signaling may indicate configuration information specifying a blind detection PDCCH in the search space, including information such as an aggregation level and/or a PDCCH ID of a blind detection PDCCH resource.
In step 101, in order to reduce the UE blind detection overhead and avoid resource position collision corresponding to the candidate PDCCH, if the first downlink control signaling indicates that the time slot in which the second downlink control signaling is located is the same as the time slot of the blind detection candidate PDCCH resource corresponding to one search space, and when the terminal blind detects the candidate PDCCH corresponding to the search space, the terminal only performs blind detection on the candidate PDCCH resource whose resource position corresponding to the second downlink control signaling does not overlap.
For example, as shown in fig. 2(c), if the slot in which the second downlink control signaling indicated by the first downlink control signaling is located is the same as the slot of the blind PDCCH candidate resource corresponding to the search space ID of 1, and the PDCCH candidates having the search space ID of 1 and whose resource positions corresponding to the second downlink control signaling do not overlap are PDCCH candidates 2 and PDCCH candidate 4, the terminal may detect DCI having the search space ID of 1 at the slot and blind PDCCH candidate 2 and PDCCH candidate 4.
In step 101, the time-frequency resource location where the second downlink control signaling indicated by the first downlink control signaling is located is obtained according to a function that determines the frequency-domain CCE index where the candidate PDCCH is located in the search space corresponding to the PDCCH resource of the next blind-check downlink control signaling after the first downlink control signaling.
Specifically, the time domain resource of the second downlink control signaling is the same as the time domain resource of the next blind detection DCI, and the frequency domain resource is determined according to a function of determining the frequency domain CCE index where the candidate PDCCH is located in the corresponding search space. For example, as shown in fig. 2(d), it is assumed that a PDCCH resource of a next blind-check DCI after a first downlink control signaling corresponds to a PDCCH candidate configuration corresponding to a search space ID of 2, where the CORESET corresponding to the search space ID of 2 includes 8 CCEs, two PDCCH candidates having an aggregation level L of 2 are PDCCH candidates 1 and PDCCH candidate 2, and CCE indexes of PDCCH candidate 1 and PDCCH candidate 2 determined according to a search space function are 2 to 3 and 6 to 7, respectively. The first downlink control signaling indicates that the aggregation level L of the second downlink control signaling is 4, a function of a CCE where the candidate PDCCH is located is determined according to the search space ID which is 2, and if the search space contains one candidate PDCCH with the aggregation level L of 4, CCE indexes of the PDCCH are 0-3 respectively, namely the CCE index corresponding to the second downlink control signaling.
Optionally, when detecting the second downlink control signaling, the terminal performs blind detection on only candidate PDCCH resources that do not overlap with resource positions corresponding to the second downlink control signaling, for the candidate PDCCH configured in the search space corresponding to the second downlink control signaling. As shown in fig. 2(d), only PDCCH candidate 2 in 2 is detected in a blind manner.
In step 102, the higher layer includes two candidate PDCCH sets when configuring the search space, one of which is a candidate PDCCH set that needs DCI or MAC CE signaling activation to be effective, and is referred to as a first PDCCH set; one is the candidate PDCCH set, called the second PDCCH set, where the RRC signaling configuration takes effect directly. Or configuring two types of search spaces at a high layer, wherein one type of search space is a search space set which needs DCI or MAC CE activation to be effective and is called as a first search space set; one is the search space in which the RRC signaling configuration takes effect directly, referred to as the second search space set.
In step 102, for the first PDCCH set, a search space ID is indicated in a third downlink control signaling or MAC CE, and a PDCCH ID in the first PDCCH set is activated or deactivated.
It should be noted that the third downlink control signaling may be the same as or different from the first downlink control signaling. The third downlink control signaling may be the same as or different from the second downlink control signaling. The third downlink control signaling can also be indicated by the first downlink control signaling or the second downlink control signaling. The third downlink control signaling may be carried by a periodic PDCCH resource or an aperiodic PDCCH resource.
Further optionally, the third downlink control signaling or the MAC CE indicates to activate PDCCH corresponding configuration information, for example, detect information such as RNTI. For example, according to the search space configuration, the PDCCH is activated to perform blind detection corresponding to a plurality of RNTI information, and one of the RNTI information is selected for detection through a third downlink control signaling or an instruction in the MAC CE.
And aiming at the first search space set, activating or deactivating the search space ID in the first search control set through third downlink control signaling or indication in the MAC CE.
Further optionally, the third downlink control signaling or configuration information in the MAC CE indicating activation of detection of PDCCH in the search space includes, but is not limited to, at least one of: aggregation level of candidate PDCCH, PDCCH ID, detection RNTI.
For example, two PDCCH aggregation levels L-2 and L-4 are included in the first search space, and the third downlink control signaling or MAC CE may indicate activation of PDCCH candidates having an aggregation level L-2 in the first search space.
Further optionally, the validation time for activating the candidate PDCCH in the search space or the validation time for activating the search space is indicated by the third downlink control signaling or the MAC CE.
In step 102, the higher layer search space configuration may be modified through a third downlink control signaling or MAC CE, for example, candidate PDCCH configurations in the specified search space, including parameter configurations such as aggregation level, number of candidate PDCCHs, DCI format detection and/or RNTI detection, and the like, are added or deleted, or the specified search space is added or deleted. For example, the higher layer may configure 2 PDCCH candidates having an aggregation level L of 2 in the search space ID of 1, and the third downlink control signaling entity MAC CE may instruct 1 PDCCH candidate having an aggregation level L of 4 added to the search space ID of 1, or may delete 1 PDCCH candidate having an aggregation level L of 2. For example, the higher layer has 3 search spaces each corresponding to a search space ID of 1, a search space ID of 2, and a search space ID of 3, and deletes the search space corresponding to the search space ID of 1 by the third downlink control signaling or the MAC CE.
Further optionally, the third downlink control signaling or the MAC CE is a common signaling, which changes the common search space configuration, or adds or deletes the common search space. The third downlink control signaling or the MAC is UE-specific signaling, changes the UE-specific search space configuration, or adds or deletes the UE-specific search space.
In the present invention, it should be noted that step 101 and step 102 are optional steps, that is, a downlink control signaling detection method of the present invention may only include step 101, only include step 102, or include step 101 and step 102.
The invention designs a downlink control signaling detection method which can indicate aperiodic PDCCH detection resources aiming at aperiodic downlink data transmission, quickly change high-level PDCCH detection configuration according to service requirements and reduce the PDCCH blind detection overhead at a terminal side.
Fig. 3 is a flowchart of an embodiment of a method for a network device according to the present invention, which specifically includes the following steps 201 to 202:
In step 201, the base station indicates aperiodic PDCCH resources by using a downlink control signaling, and/or activates or deactivates a search space for detecting PDCCH by using a downlink control signaling or MAC CE.
The specific implementation method of step 201 is described in detail in steps 101 and 102, and is not described herein.
Step 202, sending a downlink control signaling indicating aperiodic PDCCH resource, and/or activating or deactivating the downlink control signaling or MAC CE detecting the search space of PDCCH.
If step 201 only includes indicating aperiodic PDCCH resources by one kind of downlink control signaling, the network device sends downlink control signaling indicating aperiodic PDCCH resources. If step 201 only includes using one downlink control signaling or MAC CE to activate or deactivate the search space for detecting the PDCCH, the network device sends the downlink control signaling or MAC CE that activates or deactivates the search space for detecting the PDCCH. If step 201 includes using a downlink control signaling to indicate aperiodic PDCCH resources and using a downlink control signaling or MAC CE to activate or deactivate a search space for detecting PDCCH, the network device correspondingly transmits the downlink control signaling indicating aperiodic PDCCH resources and activates or deactivates the downlink control signaling or MAC CE for detecting the search space for detecting PDCCH.
In step 202, the network device sends downlink control signaling indicating aperiodic PDCCH resources to the terminal device. Further, the network device sends a PDCCH for carrying the first downlink control signaling and the second downlink control signaling to the terminal device.
In step 202, the network device sends downlink control signaling or MAC CE activating or deactivating a search space for detecting PDCCH to the terminal device. Further, the network device sends a PDCCH for carrying a third downlink control signaling, or sends a MAC CE, to the terminal device.
Fig. 4 is a flowchart of an embodiment of a method for a terminal device according to the present invention, which specifically includes the following steps 301 to 302:
In step 301, the terminal indicates aperiodic PDCCH resources with a downlink control signaling, and/or activates or deactivates a search space for detecting PDCCH with a downlink control signaling or MAC CE.
The specific implementation method of step 301 is described in detail in steps 101 and 102, and is not described herein again
Step 302, receiving a downlink control signaling indicating aperiodic PDCCH resources sent by a network device, and/or activating or deactivating a downlink control signaling or MAC CE for detecting a search space of a PDCCH.
If step 301 only includes indicating aperiodic PDCCH resources by one kind of downlink control signaling, the terminal device receives the downlink control signaling indicating aperiodic PDCCH resources. If step 301 only includes activating or deactivating the search space for detecting the PDCCH by using one downlink control signaling or MAC CE, the terminal device receives the downlink control signaling or MAC CE activating or deactivating the search space for detecting the PDCCH. If step 301 includes using a downlink control signaling to indicate an aperiodic PDCCH resource and using a downlink control signaling or MAC CE to activate or deactivate a search space for detecting a PDCCH, the terminal device correspondingly receives the downlink control signaling indicating the aperiodic PDCCH resource and activates or deactivates the downlink control signaling or MAC CE for detecting the search space for the PDCCH.
In step 302, the terminal device receives a PDCCH resource downlink control signaling indicating aperiodicity sent by the network device. Further, the terminal device receives the PDCCH carrying the first downlink control signaling and the second downlink control signaling and sent by the network device.
In step 302, the terminal device receives a downlink control signaling or MAC CE sent by the network device to activate or deactivate a search space for detecting a PDCCH. Further, the terminal device receives the PDCCH or the MAC CE signaling carrying the third downlink control signaling sent by the network device.
In step 302, the terminal receives a PDCCH sent by the network device, and acquires a corresponding first downlink control signaling, a second downlink control signaling, and a third downlink control signaling. The terminal receives the MAC CE sent by the network device, and obtains the relevant configuration information of receiving the downlink control signaling in step 102.
Fig. 5 is a schematic diagram of an embodiment of a network device, which is configured to: and sending downlink control signaling or MAC CE.
The downlink control signaling detection network device comprises at least one module for at least one of the following functions: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and sending the PDCCH or the MAC CE carrying the downlink control signaling.
In order to implement the foregoing technical solution, the network device 400 provided in the present application includes a network sending module 401, a network determining module 402, and a network receiving module 403.
The network sending module is configured to send the first downlink control signaling and the second downlink control signaling, and is further configured to send a third downlink control signaling or an MAC CE.
The network determining module is configured to determine a downlink control signaling indicating aperiodic PDCCH resources, and/or determine a downlink control signaling or MAC CE to activate or deactivate a search space for detecting a PDCCH.
The network receiving module is configured to receive configuration information for determining a downlink control signaling (including a first downlink control signaling, a second downlink control signaling, and a third downlink control signaling), and an MAC CE. The configuration information may be an indication of a network element on the core network side, or determined by a protocol convention mode. The network receiving module is further configured to receive feedback confirmation information corresponding to the downlink control signaling or the MAC CE signaling, indicating that the terminal receives the feedback confirmation information successfully.
It should be noted that the signaling type sent by the network sending module corresponds to the configuration information type received by the network receiving module.
The specific method for implementing the functions of the network sending module, the network determining module, and the network receiving module is described in the embodiments of the methods of the present application, and is not described herein again.
Fig. 6 is a schematic diagram of an embodiment of a terminal device, which is configured to: and detecting the downlink control signaling.
The downlink control signaling detection terminal device comprises at least one module for at least one of the following functions: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and receiving and detecting the downlink control signaling or the MAC CE.
In order to implement the foregoing technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503.
The terminal sending module is configured to send downlink control signaling (including a first downlink control signaling, a second downlink control signaling, and a third downlink control signaling) and feedback confirmation information corresponding to the MAC CE signaling, and is configured to determine to correctly receive the downlink control signaling and the MAC CE signaling. The feedback confirmation information determines whether the feedback confirmation information exists according to the agreement, and if the agreement does not exist corresponding to the feedback confirmation information, the terminal can choose not to send the information.
The terminal determining module is used for determining a downlink control signaling, indicating aperiodic PDCCH resources, and/or determining a downlink control signaling or MAC CE, and activating or deactivating a search space for detecting the PDCCH; and the downlink control signaling processing unit is also used for performing DCI blind detection on the received PDCCH to obtain a corresponding downlink control signaling.
The terminal receiving module is configured to receive a downlink control signaling (including a first downlink control signaling, a second downlink control signaling, and a third downlink control signaling) sent by a network device, or an MAC CE.
It should be noted that the signaling type received by the terminal receiving module corresponds to the feedback confirmation information sent by the terminal sending module.
The specific method for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module is as described in the method embodiments of the present application, and is not described herein again.
The terminal equipment can be mobile terminal equipment.
Fig. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention. As shown, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein the wireless interface may be a plurality of components, including a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The wireless interface implements a communication function with the terminal device, and processes wireless signals through the receiving and transmitting devices, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program that executes any of the embodiments of the present application, running or changed on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described herein.
Fig. 8 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 700 comprises at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in the terminal device 700 are coupled together by a bus system. A bus system is used to enable the communication of the connections between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 703 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen, among others.
The memory 702 stores executable modules or data structures. The memory may have stored therein an operating system and an application program. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, and the like for implementing various application services.
In the embodiment of the present invention, the memory 702 contains a computer program for executing any of the embodiments of the present application, and the computer program runs or changes on the processor 701.
The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and combines the hardware to complete the steps of the above method. In particular, the computer-readable storage medium has a computer program stored thereon, which when executed by the processor 701 implements the steps of the method embodiments as described in any of the embodiments above.
The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method of the present application may be implemented by hardware integrated logic circuits in the processor 701 or by instructions in the form of software. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. In a typical configuration, the apparatus of the present application includes one or more processors (one of CPU, FGAP, MUC), an input/output user interface, a network interface, and a memory.
Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application therefore also proposes a computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the embodiments of the present application. For example, the memory 603, 702 of the present invention may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM).
Computer-readable media, including both permanent and non-permanent, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
Based on the embodiments of fig. 5 to 8, the present application further provides a mobile communication system, which includes at least 1 embodiment of any terminal device in the present application and/or at least 1 embodiment of any network device in the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
It should be noted that the terms "first" and "second" in the present application are used to distinguish a plurality of objects having the same name, and have no other special meaning unless otherwise specified.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (28)
1. A method for detecting downlink control signaling, comprising at least one of the following steps:
a downlink control signaling for indicating aperiodic PDCCH resources;
and the downlink control signaling or the MAC CE is used for activating or deactivating the search space for detecting the PDCCH.
2. The method for detecting downlink control signaling according to claim 1, wherein the downlink control signaling is used to indicate aperiodic PDCCH resources in a manner of:
and indicating resource configuration information of a second downlink control signaling through a first downlink control signaling, wherein the second downlink signaling is a downlink control signaling detected by the first downlink signaling indication, and the aperiodic PDCCH resource bears the second downlink control signaling indicated by the first downlink control signaling.
3. The method for detecting downlink control signaling according to claim 1, wherein if the higher-layer configured search space at least includes the first PDCCH set, the search space ID is indicated in a third downlink control signaling or a MAC CE, and the PDCCH ID in the first PDCCH set is activated or deactivated; the first PDCCH set is a candidate PDCCH set which needs to be activated by downlink control signaling or MAC CE signaling to be effective.
4. The method for detecting downlink control signaling according to claim 1, wherein if the higher-level configuration search space at least includes the first search space set, the search space ID is activated or deactivated by an indication in a third downlink control signaling or a MAC CE, and the first search space set is a candidate search space set that is activated only when the third downlink control signaling or the MAC CE signaling is activated.
5. The method for detecting downlink control signaling in claim 2, wherein the resource configuration information of the second downlink control signaling at least includes one of the following: the position of a time-frequency resource where the second downlink control signaling is located, the format of the second downlink control signaling, the CCE aggregation level corresponding to the second downlink control signaling, the MCS level corresponding to the second downlink control signaling, and the RNTI corresponding to the second downlink control signaling are detected.
6. The method of claim 2, wherein if the first downlink control signaling is a terminal-specific downlink control signaling, the first downlink control signaling indicates a second downlink control signaling when the first downlink control signaling indicates a downlink data channel resource.
7. The method of claim 2, wherein if the first downlink control signaling is cell common downlink control signaling, the second downlink control signaling is also cell common downlink control signaling.
8. The method for detecting downlink control signaling according to claim 2, wherein the first downlink control signaling is used to indicate the candidate PDCCH configuration on the PDCCH resource corresponding to the next blind detection downlink control signaling after the first downlink control signaling.
9. The method of claim 2, wherein if the first downlink control signaling indicates that the time slot in which the second downlink control signaling is located is the same as the time slot of the blind candidate PDCCH resource corresponding to a search space, and the candidate PDCCH corresponding to the search space is blind-detected, the downlink control signaling is blind-detected only on the candidate PDCCH resource whose resource location corresponding to the second downlink control signaling does not overlap.
10. The method of downlink control signaling detection according to claim 2, wherein the first downlink control signaling is further used to indicate configuration information for blind PDCCH resource detection in a specific search space.
11. The method according to claim 3 or 4, wherein the third downlink control signaling or the MAC CE indicates activation of at least one of the following search spaces: aggregation level of candidate PDCCH, PDCCH ID, detection RNTI.
12. The method as claimed in claim 3 or 4, wherein the higher layer search space configuration is changed by the third downlink control signaling or MAC CE.
13. The method of claim 4, wherein an effective time for activating a candidate PDCCH in a search space or an effective time for activating a search space is indicated by the third downlink control signaling or a MAC CE.
14. The method for detecting downlink control signaling according to claim 5, wherein the time-frequency resource location where the second downlink control signaling indicated by the first downlink control signaling is located is obtained according to a function of determining the frequency-domain CCE index where the candidate PDCCH is located in a search space corresponding to the PDCCH resource of the next blind detection downlink control signaling after the first downlink control signaling.
15. The method as claimed in claim 5, wherein a slot offset is indicated in the first downlink control signaling, and the time domain resource location of the second controllable signaling is determined by the slot offset.
16. The method for detecting downlink control signaling according to claim 5, wherein a specific information field is adopted in the first downlink control signaling to explicitly indicate the format of the second downlink control signaling, and if the information field does not indicate, the format of the second downlink control signaling is the same as the format of the first downlink control signaling.
17. The method for detecting downlink control signaling in claim 5, wherein a specific information field is adopted in the first downlink control signaling to explicitly indicate the CCE aggregation level corresponding to the second downlink control signaling, and if the information field does not indicate the CCE aggregation level corresponding to the second downlink control signaling is the same as the CCE aggregation level corresponding to the first downlink control signaling.
18. The method for detecting downlink control signaling of claim 5, wherein a specific information field is used in the first downlink control signaling to explicitly indicate the MCS level corresponding to the second downlink control signaling, and if the information field does not indicate, the MCS level corresponding to the second downlink control signaling is the same as the MCS level corresponding to the first downlink control signaling.
19. The method as claimed in claim 5, wherein a specific information field is used in the first downlink control signaling to explicitly indicate the RNTI corresponding to the detected second downlink control signaling, and if the information field does not indicate, the RNTI corresponding to the detected second downlink control signaling is the same as the RNTI corresponding to the detected first downlink control signaling.
20. The method of claim 12, wherein configuration information of candidate PDCCH resources in a specified search space is added or deleted by the third downlink control signaling or MAC CE.
21. The method of claim 12, wherein a designated search space is added or deleted by the third downlink control signaling or the MAC CE.
22. The method for detecting downlink control signaling according to any one of claims 1 to 21, used for a network device, comprising the steps of:
indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE;
and sending downlink control signaling indicating aperiodic PDCCH resources and/or activating or deactivating the downlink control signaling or MAC CE for detecting the search space of the PDCCH to the terminal equipment.
23. The method for detecting downlink control signaling according to any one of claims 1 to 21, applied to a terminal device, comprising the following steps:
indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE;
receiving a downlink control signaling indicating aperiodic PDCCH resource sent by network equipment, and/or activating or deactivating the downlink control signaling or MAC CE for detecting a search space of the PDCCH.
24. A network device for detecting downlink control signaling, configured to implement the method of any one of claims 1 to 23,
the downlink control signaling detection network device comprises at least one module for at least one of the following functions: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and sending downlink control signaling or MAC CE.
25. A downlink control signaling detection terminal device for implementing the method of any one of claims 1 to 23,
the downlink control signaling detection terminal device comprises at least one module for at least one of the following functions: indicating aperiodic PDCCH resources by using a downlink control signaling, and/or activating or deactivating a search space for detecting the PDCCH by using a downlink control signaling or MAC CE; and receiving and detecting the downlink control signaling or the MAC CE.
26. A communication device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 23.
27. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 23.
28. A mobile communication system comprising the downlink control signaling detection network apparatus according to claim 24 and the downlink control signaling detection terminal apparatus according to claim 25.
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| ""R1-1905116 Correction on physical downlink control channel"", 3GPP TSG_RAN\\WG1_RL1, 29 March 2019 (2019-03-29) * |
| SPREADTRUM COMMUNICATIONS: "R1-1910026 "Discussion on DL signals and channels for NR-U"", 3GPP TSG_RAN\\WG1_RL1, no. 1, 1 October 2019 (2019-10-01) * |
| VIVO: "Discussion on UE adaptation to the traffic and UE power consumption characteristics", 《3GPP TSG RAN WG1 MEETING #95 R1-1812330》 * |
| 张庆辉;吴锋;李振伟;: "载波聚合移动通信技术研究", 通信对抗, no. 04, 15 December 2015 (2015-12-15) * |
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