Control channel transmission method and related equipment

Abstract

The invention provides a control channel transmission method and related equipment, and relates to the technical field of communication, and the method comprises the step of determining the repeated transmission of physical downlink control channel transmission (PDCCH) according to network side configuration or indication. The problem that only PDCCH single transmission is supported in the prior art is solved at least to a certain extent.

Description

Background Art

[0002] In the satellite communication scenario, the transmission distance of the communication link is much greater than that of the terrestrial network. At the same time, the channel is affected by cloud / rain attenuation, atmospheric absorption loss, ionospheric scintillation loss, etc., and the reception of the downlink control channel cannot meet the user's needs.

[0003] Currently, the 3GPP standard only supports single transmission of PDCCH.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] The present disclosure provides a control channel transmission method and related devices, which at least overcome to a certain extent the problem of only supporting single transmission of PDCCH in the related art.

[0006] Other features and advantages of the present disclosure will become apparent through the following detailed description, or be learned in part through the practice of the present disclosure.

[0007] In a first aspect, an embodiment of the present disclosure provides a control channel transmission method, which is applied to a terminal device. The method includes:

[0008] Determine physical downlink control channel transmission (PDCCH) retransmission according to network-side configuration or indication.

[0009] In a second aspect, an embodiment of the present disclosure provides a control channel transmission method, which is applied to a network-side device. The method includes:

[0010] Determine the PDCCH retransmission strategy;

[0011] Retransmit the PDCCH according to the PDCCH retransmission strategy.

[0012] In a third aspect, an embodiment of the present disclosure provides a terminal device, including:

[0013] A first determination module, configured to determine PDCCH retransmission according to network-side configuration or indication.

[0014] In a fourth aspect, an embodiment of the present disclosure provides a network-side device, including:

[0015] A second determination module, configured to determine the PDCCH retransmission strategy;

[0016] A transmission module, configured to retransmit the PDCCH according to the PDCCH retransmission strategy.

[0017] Fifth aspect, an embodiment of the present disclosure provides an electronic device, including: a processor; and a memory for storing executable instructions of the processor; wherein, the processor is configured to execute the method described in the first aspect above by executing the executable instructions.

[0018] Sixth aspect, an embodiment of the present disclosure provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method described in the first aspect above is implemented.

[0019] Seventh aspect, according to another aspect of the present disclosure, there is also provided a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. The processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the method described in any one of the above.

[0020] A control channel transmission method and related devices provided by an embodiment of the present disclosure relate to the field of communication technologies. The method includes: determining physical downlink control channel transmission PDCCH retransmission according to network-side configuration or indication. At least to some extent, it overcomes the problem in the related art that only single transmission of PDCCH is supported.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0023] Figure 1 Show a schematic diagram of PDCCH generation and indication in an embodiment of the present disclosure;

[0024] Figure 2 Show one of the interaction schematic diagrams of a control channel transmission method in an embodiment of the present disclosure;

[0025] Figure 3 Show one of the flow schematic diagrams of a control channel transmission method in an embodiment of the present disclosure;

[0026] Figure 4 Show the second flow schematic diagram of a control channel transmission method in an embodiment of the present disclosure;

[0027] Figure 5 The second interactive schematic diagram showing a control channel transmission method in an embodiment of the present disclosure;

[0028] Figure 6 The first schematic diagram showing a message format in an embodiment of the present disclosure;

[0029] Figure 7 The second schematic diagram showing a message format in an embodiment of the present disclosure;

[0030] Figure 8 The third interactive schematic diagram showing a control channel transmission method in an embodiment of the present disclosure;

[0031] Figure 9 The third schematic diagram showing a message format in an embodiment of the present disclosure;

[0032] Figure 10 The fourth schematic diagram showing a message format in an embodiment of the present disclosure;

[0033] Figure 11 The fourth interactive schematic diagram showing a control channel transmission method in an embodiment of the present disclosure;

[0034] Figure 12 The fifth schematic diagram showing a message format in an embodiment of the present disclosure;

[0035] Figure 13 The sixth schematic diagram showing a message format in an embodiment of the present disclosure;

[0036] Figure 14 The schematic diagram showing the structure of a terminal device in an embodiment of the present disclosure;

[0037] Figure 15 The schematic diagram showing the structure of a network-side device in an embodiment of the present disclosure;

[0038] Figure 16 The schematic diagram showing the structure of an electronic device in an embodiment of the present disclosure. Detailed implementation manners

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. The features, structures, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0040] In addition, the accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0041] Explanation of the terms in the embodiments of the present disclosure includes:

[0042] Physical Downlink Control Channel (PDCCH) is responsible for sending control information to the User Equipment (UE).

[0043] Control Channel Element (CCE) is the basic unit that constitutes the PDCCH. The size of one CCE is 6 Resource Element Groups (REGs). One or more CCEs are aggregated to carry the PDCCH.

[0044] Control Resource Set (CORESET). The time domain of the CORESET is 1 - 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the frequency domain is granular with 6 Physical Resource Blocks (PRBs). Information such as the frequency domain resource information (frequency domain range, etc.) and the number of OFDM symbols occupied in the time domain of the PDCCH is encapsulated in the CORESET.

[0045] Search Space consists of a set of candidate control channels composed of CCEs with the same aggregation level. Information such as the starting OFDM symbol of the PDCCH, the monitoring period, and the associated CORESET is encapsulated in the search space.

[0046] Search Space set (SS set) is composed of multiple search spaces.

[0047] Aggregation level (AL) is the number of CCEs used by the PDCCH message. A PDCCH can use 1 / 2 / 4 / 8 / 16 consecutive CCEs, that is, the PDCCH aggregation level can be 1 / 2 / 4 / 8 / 16, etc.

[0048] PDCCH candidate set: A set of PDCCH candidates. A PDCCH candidate refers to a time-frequency resource composed of a specified number of CCEs. From the perspective of the UE, it is possible that a PDCCH is carried on this resource, but it is not certain.

[0049] In the satellite communication scenario, the transmission distance of the communication link is much greater than that of the terrestrial network. At the same time, the channel is affected by cloud / rain attenuation, atmospheric absorption loss, ionospheric scintillation loss, etc., and the reception of the downlink control channel cannot meet the user's requirements.

[0050] Currently, the 3GPP standard only supports single transmission of PDCCH. According to the existing protocol, the UE can obtain information such as the time-frequency resource information of the PDCCH, the scheduling period, and the CCE aggregation degree that the PDCCH may be transmitted based on the search space configured by the network side and the control resource set CORESET associated with the search space, as Figure 1 shown. The UE performs blind decoding based on the above information to obtain the PDCCH information. Currently, once the UE decodes successfully, it will stop the blind decoding process, that is, it will not continue the subsequent detection after detecting a PDCCH. That is to say, the number of PDCCH transmissions is 1.

[0051] Based on this, the embodiments of the present disclosure provide a control channel transmission method and related devices, which relate to the field of communication technologies. The method includes: determining the repeated transmission of the physical downlink control channel PDCCH according to the configuration or indication of the network side. At least to a certain extent, it overcomes the problem of only supporting single transmission of PDCCH in the related art and improves the reception quality of the PDCCH.

[0052] The following will describe this exemplary embodiment in detail with reference to the accompanying drawings and embodiments.

[0053] First, the embodiments of the present disclosure provide a control channel transmission method, which can be executed by any electronic device with computing and processing capabilities. In the following process, the electronic device is taken as an example of a terminal device.

[0054] Figure 2 An interaction diagram showing a control channel transmission method in the embodiments of the present disclosure is as Figure 2 shown. The control channel transmission method provided in the embodiments of the present disclosure includes the following steps:

[0055] S202: The network side device determines the PDCCH repeated transmission strategy.

[0056] S204: The terminal device determines the repeated transmission of the physical downlink control channel PDCCH according to the configuration or indication of the network side.

[0057] S206: The network-side device repeats the transmission of the PDCCH according to the PDCCH retransmission strategy.

[0058] Through the above method, the problem of only supporting single transmission of the PDCCH in the related art is overcome at least to a certain extent, and the reception quality of the PDCCH is improved.

[0059] In a possible embodiment, for the method in the present disclosure, determining the PDCCH retransmission may include: determining at least one of the following pieces of information: PDCCH retransmission enabling; PDCCH retransmission times; time-domain resources where the PDCCH retransmission is located; SearchSpace corresponding to the PDCCH retransmission; CORESET corresponding to the PDCCH retransmission; CCE used for the PDCCH retransmission. By determining at least one of the above pieces of information, the PDCCH retransmission can be directly determined.

[0060] In a possible embodiment, for the method in the present disclosure, determining the PDCCH retransmission may include: receiving first information sent by the network side, where the first information is used to indicate the PDCCH retransmission, and the first information includes at least one of the following: first high-layer signaling configuration, first downlink broadcast information indication, first downlink control information indication, first media access control - control element MAC CE indication, implicit indication in the first configuration of the search space SearchSpace, first control resource set CORESET configuration, first control channel element CCE configuration; or, determining the PDCCH retransmission based on a first predefined rule.

[0061] Furthermore, determine at least one of the following pieces of information: PDCCH retransmission enabling; PDCCH retransmission times; time-domain resources where the PDCCH retransmission is located; SearchSpace corresponding to the PDCCH retransmission; CORESET corresponding to the PDCCH retransmission; CCE used for the PDCCH retransmission.

[0062] First determine the PDCCH retransmission, and then determine at least one of the above pieces of information to perform the PDCCH retransmission.

[0063] In a possible embodiment, in the above two ways of determining the PDCCH retransmission, after determining the PDCCH retransmission, blind detection is performed in the time-frequency resources corresponding to the PDCCH retransmission.

[0064] In a possible embodiment, for the method in the present disclosure, determining the PDCCH retransmission may include: continuously performing blind detection to determine the PDCCH retransmission.

[0065] Continuously perform blind detection according to the network-side configuration or indication. After receiving a PDCCH during blind detection, do not stop and continue with blind detection until there is no information available for blind detection. If multiple PDCCH transmissions are received through blind detection, determine the PDCCH retransmission and complete the blind detection process.

[0066] In a possible embodiment, in the method of the present disclosure, performing blind detection may include: monitoring the candidate set of PDCCH retransmissions in the corresponding SearchSpace for PDCCH retransmissions and in the CORESET associated with the SearchSpace; receiving and decoding the candidate PDCCHs.

[0067] In a possible embodiment, if the PDCCH retransmission corresponds to 1 SearchSpace, or 1 CORESET, or 1 set of CCEs, after successful blind detection in the candidate set of PDCCH retransmissions, perform blind detection on the next candidate PDCCH until the number of successful blind detections is equal to the number of PDCCH retransmissions, or the detection position reaches the end of the PDCCH candidate set.

[0068] In a possible embodiment, if the PDCCH retransmission corresponds to multiple SearchSpaces, or multiple CORESETs, or multiple CCEs, after successful blind detection in the candidate set of PDCCH retransmissions, end the blind detection on the current SearchSpace, or current CORESET, or current CCE where the candidate set of PDCCH retransmissions is located, and perform blind detection on the candidate set of PDCCH retransmissions in the next SearchSpace, CORESET or CCE.

[0069] In a possible embodiment, receiving and decoding the candidate PDCCHs may include: performing combined decoding on all received PDCCH retransmissions; the combination algorithm includes at least one of the following: soft bit combination, symbol-level combination.

[0070] In a possible embodiment, the number of PDCCH retransmissions is a first integer value, and the first integer value may be 2, 4, etc.

[0071] In a possible embodiment, the time-domain resource where the PDCCH retransmission is located may be the same time slot.

[0072] In a possible embodiment, the time-domain resource where the PDCCH retransmission is located may be M consecutive time slots, where M is a positive integer and M≥2.

[0073] In a possible embodiment, the time-domain resource where the PDCCH retransmission is located may be N non-consecutive time slots, where N is a positive integer and N≥2.

[0074] In a possible embodiment, the PDCCH repetition transmission corresponding search space can be 1, or 2, or multiple.

[0075] When the search space is 2 or multiple, the search spaces can be correlated with each other or independent.

[0076] In a possible embodiment, the PDCCH repetition transmission corresponding CORESET can be 1, or 2, or multiple.

[0077] When the CORESET is 2 or multiple, the CORESETs can be correlated with each other or independent.

[0078] In a possible embodiment, the number of CCE groups used for PDCCH repetition transmission can be 1 group, or 2 groups, or multiple groups.

[0079] When the number of CCE groups is 2 or multiple, the CCEs can be consecutive or non - consecutive.

[0080] In a possible embodiment, when the PDCCH repetition transmission corresponds to 1 or 2 or multiple SearchSpaces, except for the SearchSpaceId, the remaining configurations of each SearchSpace can be the same or different.

[0081] In a possible embodiment, when the PDCCH repetition transmission corresponds to 1 or 2 or multiple SearchSpaces, except for the SearchSpaceId, the remaining configurations of each SearchSpace can be the same or different.

[0082] In a possible embodiment, when the PDCCH repetition transmission uses 1 or 2 or multiple groups of CCE, the CCE can be located in 1 or 2 or multiple CORESETs. The mapping modes (interleaved mapping, non - interleaved mapping) between different CCEs and REGs can be the same or different.

[0083] In a possible embodiment, when the PDCCH repetition transmission uses 1 group of CCE, the CCE aggregation levels used by different PDCCHs can be the same or different.

[0084] In a possible embodiment, determining that PDCCH repeated transmission is enabled may include: receiving second information for indicating that PDCCH repeated transmission is enabled, where the second information includes at least one of the following: second high-layer signaling configuration, second downlink broadcast information indication, second downlink control information indication, second MAC CE indication, implicit indication in the second configuration of SearchSpace, second CORESET configuration, second CCE configuration; or, determining that PDCCH repeated transmission is enabled based on a second predefined rule.

[0085] In a possible embodiment, determining the number of PDCCH repeated transmissions may include: receiving third information for indicating the number of PDCCH repeated transmissions, where the third information includes at least one of the following: third high-layer signaling configuration, third downlink broadcast information indication, third downlink control information indication, third MAC CE indication, implicit indication in the third configuration of SearchSpace, third CORESET configuration, third CCE configuration; or, determining the number of PDCCH repeated transmissions based on a third predefined rule.

[0086] In a possible embodiment, determining the SearchSpace corresponding to PDCCH repeated transmission may include: receiving fourth information for indicating the SearchSpace corresponding to PDCCH repeated transmission, where the fourth information includes at least one of the following: fourth high-layer signaling configuration, fourth downlink broadcast information indication, fourth downlink control information indication, fourth MAC CE indication, the first SearchSpace configuration corresponding to PDCCH repeated transmission; or, determining the SearchSpace corresponding to PDCCH repeated transmission based on a fourth predefined rule.

[0087] In a possible embodiment, the fourth high-layer signaling or fourth downlink control information includes at least one of the following: the SearchSpace number (SearchSpaceRepId) corresponding to the PDCCH repeated transmission, the SearchSpace number (SearchSpaceRepLinkId) associated with the PDCCH repeated transmission; where the SearchSpace with the same value of the SearchSpace number corresponding to the PDCCH repeated transmission is used for the same PDCCH repeated transmission; the SearchSpace number associated with the PDCCH repeated transmission indicates other SearchSpaces used for the PDCCH repeated transmission in addition to the current SearchSpace.

[0088] In a possible embodiment, determining the CORESET corresponding to the PDCCH retransmission may include: receiving fifth information for indicating the CORESET corresponding to the PDCCH retransmission, where the fifth information includes at least one of the following: fifth high-layer signaling configuration, fifth downlink broadcast information indication, fifth downlink control information indication, fifth MAC CE indication, the first CORESET configuration corresponding to the PDCCH retransmission; or, determining the CORESET corresponding to the PDCCH retransmission based on a fifth predefined rule.

[0089] In a possible embodiment, the fifth high-layer signaling or the fifth downlink control information includes at least one of the following: the CORESET number (controlResourceSetRepId) corresponding to the PDCCH retransmission, the CORESET number (controlResourceSetRepLinkId) associated with the PDCCH retransmission; where the CORESET with the same numerical value as the CORESET number corresponding to the PDCCH retransmission is used for the same PDCCH retransmission; the CORESET number associated with the PDCCH retransmission indicates the CORESETs other than the current CORESET that are used for the PDCCH retransmission.

[0090] In a possible embodiment, determining the CCE used for the PDCCH retransmission may include: receiving sixth information for indicating the CORESET corresponding to the PDCCH retransmission, where the sixth information includes at least one of the following: sixth high-layer signaling configuration, sixth downlink broadcast information indication, sixth downlink control information indication, sixth MAC CE indication, the CORESET configuration; or, determining the CCE used for the PDCCH retransmission based on a sixth predefined rule.

[0091] In a possible embodiment, in the high-layer signaling configuration, downlink broadcast information indication, downlink control information indication, MAC CE indication, configuration in the search space SearchSpace, CORESET configuration, CCE configuration, a new field is added, or, a new parameter is added in the reserved bits, to indicate the PDCCH retransmission, PDCCH retransmission enabling, PDCCH retransmission times, time-domain resources where the PDCCH retransmission is located, the SearchSpace corresponding to the PDCCH retransmission, the CORESET corresponding to the PDCCH retransmission, and the CCE used for the PDCCH retransmission.

[0092] It should be noted that a series of information including the first to sixth information in the high-layer signaling configuration, downlink broadcast information indication, downlink control information indication, MAC CE indication, configuration in the search space SearchSpace, CORESET configuration, and CCE configuration can all be configured by adding a new field in the information or adding a parameter in the reserved bits.

[0093] In a possible embodiment, it can be used to enable PDCCH repeated transmission, or indicate the number of PDCCH repeated transmissions, or indicate the search space corresponding to the PDCCH repeated transmission, or indicate the CORESET corresponding to the PDCCH repeated transmission by adding a new high-layer signaling or adding a parameter in the original high-layer signaling.

[0094] In a possible embodiment, the second high-layer signaling can be a new high-layer signaling or a parameter added to the original high-layer signaling. The newly added content can be RepConfig, indicating the enabling of PDCCH repeated transmission capability.

[0095] In a possible embodiment, the third high-layer signaling can be a new high-layer signaling or a parameter added to the original high-layer signaling. The newly added content can be RepNem, indicating the number of PDCCH repeated transmissions.

[0096] In a possible embodiment, it can be used to enable PDCCH repeated transmission, or indicate the number of PDCCH repeated transmissions, or indicate the search space corresponding to the PDCCH repeated transmission, or indicate the CORESET corresponding to the PDCCH repeated transmission by adding a new downlink control information or adding a message field to the original downlink control information.

[0097] In a possible embodiment, the second downlink control information can be a new downlink control information or a message field added to the original downlink control information. The newly added content can indicate the enabling of PDCCH repeated transmission capability.

[0098] In a possible embodiment, the third downlink control information can be a new downlink control information or a message field added to the original downlink control information. The newly added content can indicate the number of PDCCH repeated transmissions.

[0099] In a possible embodiment, a parameter can also be added in the reserved bits of the Physical Broadcast Channel (PBCH) message or the reserved bits of the Master Information Block (MIB) message to indicate the enabling of PDCCH repeated transmission or the number of PDCCH repeated transmissions.

[0100] Figure 3The flowchart of a control channel transmission method in an embodiment of the present disclosure is shown. As Figure 3 shown, it includes the following steps:

[0101] S302: Determine the physical downlink control channel transmission PDCCH retransmission according to the network side configuration or indication.

[0102] Figure 4 The flowchart of a control channel transmission method in an embodiment of the present disclosure is shown. As Figure 4 shown, it includes the following steps:

[0103] S402: Determine the PDCCH retransmission strategy.

[0104] S404: Retransmit the PDCCH according to the PDCCH retransmission strategy.

[0105] In a possible embodiment, the network side device determines the number of PDCCH retransmissions, which may include the following methods: Determine the number of PDCCH retransmissions based on the seventh predefined.

[0106] In a possible embodiment, the network side device determines the number of PDCCH retransmissions, which may include the following methods: Determine the number of PDCCH retransmissions according to channel sensing.

[0107] In a possible embodiment, determining the number of PDCCH retransmissions according to channel sensing may include: receiving the uplink control information or uplink data information of the terminal, determining the uplink reception packet loss rate; determining the number of PDCCH retransmissions according to the uplink reception packet loss rate and the PDCCH reception success rate threshold.

[0108] In a possible embodiment, the number of PDCCH retransmissions can be determined by formula (1) as follows:

[0109] 1 - P fail S ≥P suc,min

[0110] where P fail- represents the uplink reception packet loss rate; P sun,mic represents the PDCCH reception success rate threshold; S represents the number of PDCCH retransmissions.

[0111] In a possible embodiment, the network side device determines the number of PDCCH retransmissions, which may include the following methods: receiving the information reported by the terminal and determining the number of PDCCH retransmissions.

[0112] In a possible embodiment, when the receiving terminal reports information to determine the PDCCH retransmission count, it may include: determining the PDCCH retransmission count according to the PDCCH retransmission count requirement in the reported information.

[0113] In a possible embodiment, when the receiving terminal reports information to determine the PDCCH retransmission count, it may include: determining the PDCCH retransmission count according to the PDCCH reception packet loss rate and the PDCCH reception success rate threshold in the reported information.

[0114] In a possible embodiment, the PDCCH retransmission count can be determined by the following formula (2), as shown below:

[0115] 1 - P fai s ≥P suc,min

[0116] where P fail- represents the PDCCH reception packet loss rate; P suc,min represents the PDCCH reception success rate threshold; and S represents the PDCCH retransmission count.

[0117] In a possible embodiment, the minimum PDCCH retransmission count that meets the PDCCH reception success rate threshold is used as the PDCCH retransmission count.

[0118] Through the above description, the control channel transmission method in the present disclosure is described through the following embodiments, as follows:

[0119] Embodiment 1: Enable PDCCH retransmission through MIB message indication, and multiple SearchSpaces are used for PDCCH retransmission.

[0120] Figure 5 The interaction diagram of a control channel transmission method in an embodiment of the present disclosure is shown, as Figure 5 shown, including the following steps:

[0121] S502: Send downlink broadcast information to the terminal device.

[0122] Among them, in the downlink broadcast information, the PBCH or the reserved bit of the MIB message is used to indicate whether to enable PDCCH retransmission.

[0123] In a possible embodiment, the message format of the MIB message is as Figure 6 shown.

[0124] S504: The terminal device receives the downlink broadcast information, obtains the PDCCH retransmission configuration, and determines that PDCCH retransmission is enabled.

[0125] In a possible embodiment, when the PDCCH retransmission configuration (pdcchRepConfig) = 1, or the pdcchRepConfig parameter is enabled, it is determined to enable PDCCH retransmission.

[0126] S506: The network side device sends a downlink control message or a downlink data message to the terminal device to indicate PDCCH retransmission.

[0127] In a possible embodiment, the SearchSpace information format indicated by the downlink control message or the downlink data message is as Figure 7 shown.

[0128] S508: The terminal device receives the downlink control message or the downlink data message, and obtains the SearchSpace number associated with PDCCH retransmission.

[0129] S510: The terminal device obtains the current SearchSpace and the SearchSpace information associated with PDCCH retransmission.

[0130] S512: The terminal device determines the time-frequency resource information of the PDCCH according to the current SearchSpace, the SearchSpace information associated with PDCCH retransmission, and the CORESET associated with the search space.

[0131] In a possible embodiment, S512 further includes determining information such as the scheduling period of the PDCCH and the CCE aggregation degree of PDCCH transmission.

[0132] S514: The terminal device performs blind detection in the current SearchSpace, the SearchSpace associated with PDCCH retransmission, and the CORESET corresponding to the search space respectively according to the time-frequency resource information of the PDCCH, and combines and decodes all received PDCCH retransmissions.

[0133] Embodiment 2: Multiple CORESETs are used for PDCCH retransmission, and PDCCH retransmission is implicitly indicated to be enabled. Implicit means not directly indicating, but the terminal device can determine PDCCH retransmission through the received information.

[0134] Figure 8 The interaction diagram of a control channel transmission method in an embodiment of the present disclosure is shown, as Figure 8 shown, and includes the following steps:

[0135] S802: The network side device sends a downlink control message or a downlink data message to indicate the PDCCH retransmission method.

[0136] Among them, the format of the SearchSpace information in the downlink control or data message is as Figure 9 shown.

[0137] Among them, the format of the CORESET information indicated by the SearchSpace in the downlink control or data message is as Figure 10 shown, and the specific information will not be elaborated.

[0138] S804: The terminal device receives a downlink control message or a downlink data message, obtains the CORESET number corresponding to the PDCCH transmission, determines to enable PDCCH repeated transmission, and determines the CORESET number associated with the PDCCH repeated transmission.

[0139] Among them, the CORESET number corresponding to the PDCCH transmission is the control resource set link identifier (controlResourceSetLinkId).

[0140] S806: The terminal device performs blind detection in the current SearchSpace, the CORESET corresponding to the search space, and the associated CORESET, and combines and decodes all received PDCCH repeated transmissions.

[0141] Embodiment 3: The PBCH message indicates to enable PDCCH repeated transmission, and the PDCCH repeated transmission uses 1 set of CCEs.

[0142] Figure 11 Shows an interaction diagram of a control channel transmission method in an embodiment of the present disclosure, as Figure 11 shown, including the following steps:

[0143] S1102: The network side device sends downlink broadcast information to the terminal device, indicating to enable PDCCH repeated transmission, or indicating the number of PDCCH repeated transmissions.

[0144] In a possible embodiment, the PBCH or MIB message reserved bit is used to indicate to enable PDCCH repeated transmission, or to indicate the number of PDCCH repeated transmissions.

[0145] In a possible embodiment, the PBCH information format is as Figure 12 shown.

[0146] S1104: The terminal device receives the downlink broadcast information, determines to enable PDCCH repeated transmission, or the number of PDCCH repeated transmissions.

[0147] S1106: The network side device sends a downlink control message or a downlink data message to the terminal device, indicating PDCCH repeated transmission.

[0148] In a possible embodiment, when the PBCH indicates the PDCCH retransmission times, the base station sends the downlink control message or the downlink data message following the existing protocol design.

[0149] When the PBCH only indicates enabling the PDCCH retransmission, the CORESET information format indicated by the downlink control or data message is as Figure 13 shown.

[0150] S1108: The terminal device receives the downlink control message or the downlink data message, and obtains the CCE information used for the PDCCH retransmission.

[0151] S1110: The terminal device evenly divides the CCE resources corresponding to the CCE information according to the PDCCH retransmission times, and determines the new CCE aggregation degree.

[0152] In a possible embodiment, assume that the original CCE aggregation degree = 8 and the PDCCH retransmission times = 2, then the CCE aggregation degree used for each PDCCH retransmission = 4.

[0153] S1112: The terminal device performs blind detection in the current SearchSpace and the CORESET corresponding to the search space respectively according to the new CCE aggregation degree, and combines and decodes all the received PDCCH retransmissions.

[0154] Based on the same inventive concept, Figure 14 shows a schematic structural diagram of a terminal device in an embodiment of the present disclosure, as Figure 14 shown. The terminal device 140 includes: a first determination module 1401.

[0155] Among them, the first determination module 1401 is used to determine the PDCCH retransmission according to the network side configuration or indication.

[0156] Based on the same inventive concept, Figure 15 shows a schematic structural diagram of a network side device in an embodiment of the present disclosure, as Figure 15 shown. The terminal device 150 includes: a second determination module 1501 and a transmission module 1502.

[0157] Among them, the second determination module 1501 is used to determine the PDCCH retransmission strategy, and the transmission module 1502 is used to retransmit the PDCCH according to the PDCCH retransmission strategy.

[0158] Since the principles of solving problems in the above embodiments of the terminal device and the network side device are similar to those in the above method embodiments, the implementation of the above embodiments of the terminal device and the network side device can refer to the implementation of the above method embodiments, and the repeated parts will not be described again.

[0159] Among them, the network-side device can be a Base Transceiver Station (BTS) in Global System of Mobile communication (GSM) or Code Division Multiple Access (CDMA), or a Node B (NB) in Wideband Code Division Multiple Access (WCDMA), or an Evolutional Node B (eNB or eNodeB) in LTE, or a Next Generation Radio Access Network (NGRAN) device, or a base station (gNB) in a New Radio (NR) system, or a radio controller in a Cloud Radio Access Network (CRAN), or the access network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a network-side device in a future-evolved Public Land Mobile Network (PLMN), etc., which is not limited herein.

[0160] The terminal device can be, but is not limited to, various personal computers, laptop computers, smart phones, tablet computers, Internet of Things devices, and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart vehicle-mounted devices, etc. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. It also includes new forms of terminal devices, such as drones, satellite communication terminals, etc., which are essentially devices that receive electromagnetic waves sent by network-side devices for communication, and are not limited herein. So far, the present disclosure has been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0161] Those skilled in the art to which the present disclosure pertains can understand that various aspects of the present disclosure can be implemented as a system, a method, or a program product. Therefore, various aspects of the present disclosure can be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or an implementation combining hardware and software aspects, which can be collectively referred to herein as "circuit", "module", or "system".

[0162] The following refers to Figure 16Describe the electronic device 1600 according to this embodiment of the present disclosure. Figure 16 The displayed electronic device 1600 is merely an example and should not impose any limitations on the functions and scope of use of the embodiments of the present disclosure.

[0163] As Figure 16 shown, the electronic device 1600 is presented in the form of a general-purpose computing device. The components of the electronic device 1600 may include, but are not limited to: at least one of the above processing units 1610, at least one of the above storage units 1620, and a bus 1630 connecting different system components (including the storage unit 1620 and the processing unit 1610).

[0164] Among them, the storage unit stores program code, and the program code can be executed by the processing unit 1610, so that the processing unit 1610 executes the steps according to various exemplary embodiments of the present disclosure described in the above "Exemplary Method" section of this specification. For example, the processing unit 1610 can execute the steps of any one of the above method embodiments.

[0165] The storage unit 1620 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 16201 and / or a cache storage unit 16202, and may further include a read-only storage unit (ROM) 16203.

[0166] The storage unit 1620 may further include a program / utilities 16204 having a set (at least one) of program modules 16205. Such program modules 16205 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data. The implementation of a network environment may be included in each or some combination of these examples.

[0167] The bus 1630 may represent one or more of several types of bus structures, including a storage unit bus or a storage unit controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any bus structure among multiple bus structures.

[0168] The electronic device 1600 can also communicate with one or more external devices 1640 (such as a keyboard, a pointing device, a Bluetooth device, etc.), and can also communicate with one or more devices that enable a user to interact with the electronic device 1600, and / or communicate with any device (such as a router, a modem, etc.) that enables the electronic device 1600 to communicate with one or more other computing devices. Such communication can be carried out through the input / output (I / O) interface 1650. Moreover, the electronic device 1600 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through the network adapter 1660. As shown in the figure, the network adapter 1660 communicates with other modules of the electronic device 1600 through the bus 1630. It should be understood that although not shown in the figure, other hardware and / or software modules can be used in combination with the electronic device 1600, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, etc.

[0169] Through the description of the above embodiments, those skilled in the art can easily understand that the exemplary embodiments described herein can be implemented by software, or can be implemented by a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product, and the software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network-side device, etc.) to execute the method according to the embodiments of the present disclosure.

[0170] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer program product or a computer program, and the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to enable the computer device to execute the method in the above embodiments.

[0171] In an exemplary embodiment of the present disclosure, a computer-readable storage medium is further provided, and the computer-readable storage medium can be a readable signal medium or a readable storage medium. A program product capable of implementing the above method of the present disclosure is stored thereon. In some possible implementation manners, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program code, and when the program product runs on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary embodiments of the present disclosure described in the "Exemplary Method" section of this specification.

[0172] More specific examples of the computer-readable storage medium in the present disclosure may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0173] In the present disclosure, the computer-readable storage medium may include a data signal propagated in a baseband or as part of a carrier wave, in which the readable program code is carried. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The readable signal medium may also be any readable medium other than the readable storage medium, which can send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0174] Optionally, the program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination of the above.

[0175] In specific implementation, the program code for performing the operations of the present disclosure may be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, etc., and also including conventional procedural programming languages such as the "C" language or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, executed as an independent software package, partially on the user computing device and partially on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., by connecting through the Internet using an Internet service provider).

[0176] It should be noted that although several modules or units of the devices for action execution are mentioned in the above detailed description, such a division is not mandatory. In fact, according to the embodiments of the present disclosure, the features and functions of two or more of the above-described modules or units may be embodied in one module or unit. Conversely, the features and functions of one module or unit described above may be further divided into being embodied by multiple modules or units.

[0177] In addition, although the various steps of the methods in the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc.

[0178] From the description of the above embodiments, those skilled in the art can easily understand that the exemplary embodiments described herein can be implemented by software, or by a combination of software and necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, including several instructions to enable a computing device (such as a personal computer, a server, a mobile terminal, or a network-side device, etc.) to execute the methods according to the embodiments of the present disclosure.

[0179] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A control channel transmission method, characterized in that, Applied to a terminal device, the method includes: Determine physical downlink control channel transmission (PDCCH) retransmission according to network - side configuration or indication.

2. The method according to claim 1, wherein Determining the PDCCH retransmission includes determining at least one of the following pieces of information: PDCCH retransmission enable; PDCCH retransmission times; Time - domain resources where the PDCCH retransmission is located; SearchSpace corresponding to the PDCCH retransmission; CORESET corresponding to the PDCCH retransmission; CCEs used for the PDCCH retransmission.

3. The method according to claim 2, wherein After determining the PDCCH retransmission, the method includes: Perform blind detection in the time - frequency resources corresponding to the PDCCH retransmission.

4. The method according to claim 1, wherein Determining the PDCCH retransmission includes: Continuously perform blind detection to determine the PDCCH retransmission.

5. The method according to claim 3 or 4, characterized in that, Performing blind detection includes: In the SearchSpace corresponding to the PDCCH retransmission and the CORESET associated with the SearchSpace, monitor the candidate set of PDCCH retransmissions; Receive candidate PDCCHs and decode them.

6. The method according to claim 5, wherein Monitoring the candidate set of PDCCH retransmissions includes: If the PDCCH retransmission corresponds to 1 SearchSpace, or 1 CORESET, or 1 group of CCEs, after successful blind detection in the candidate set of PDCCH retransmissions, perform blind detection on the next candidate PDCCH until the number of successful blind detections is equal to the PDCCH retransmission times, or the detection position reaches the end of the PDCCH candidate set; If the PDCCH retransmission corresponds to multiple SearchSpaces, or multiple CORESETs, or multiple CCEs, after successful blind detection in the candidate set of PDCCH retransmissions, end the blind detection on the current SearchSpace, or current CORESET, or current CCE where the candidate set of PDCCH retransmissions is located, and perform blind detection on the candidate set of PDCCH retransmissions in the next SearchSpace, CORESET or CCE.

7. The method according to claim 5, wherein Receiving the candidate PDCCHs and decoding them includes: Perform combined decoding on all received PDCCH retransmissions; the combining algorithms include at least one of the following: soft - bit combining, symbol - level combining.

8. The method according to claim 1, characterized in that, Determining the PDCCH retransmission includes: Receive the first information sent by the network side, where the first information is used to indicate the PDCCH retransmission, and the first information includes at least one of the following: first high - layer signaling configuration, first downlink broadcast information indication, first downlink control information indication, first media access control - control element (MAC CE) indication, first configuration in the search space (SearchSpace), first control resource set (CORESET) configuration, implicit indication in the first control channel element (CCE) configuration, indication of continuously performing blind detection; Or, determine the PDCCH retransmission based on a first predefined rule.

9. The method according to claim 1, wherein The time - domain resources where the PDCCH retransmission is located are the same time slot, or consecutive M time slots, or non - consecutive N time slots; where M and N are positive integers, and M≥2, N≥2.

10. The method according to claim 2, characterized in that, Determine the enabling of PDCCH repeated transmission, including: Receive a second piece of information, which is used to indicate the enabling of PDCCH repeated transmission, and the second piece of information includes at least one of the following: second high-layer signaling configuration, second downlink broadcast information indication, second downlink control information indication, second MAC CE indication, implicitly indicated in the second configuration of SearchSpace, second CORESET configuration, second CCE configuration; Alternatively, determine the enabling of PDCCH repeated transmission based on a second predefined condition.

11. The method according to claim 2, characterized in that, Determine the number of PDCCH repeated transmissions, including: Receive a third piece of information, which is used to indicate the number of PDCCH repeated transmissions, and the third piece of information includes at least one of the following: third high-layer signaling configuration, third downlink broadcast information indication, third downlink control information indication, third MAC CE indication, implicitly indicated in the third configuration of SearchSpace, third CORESET configuration, third CCE configuration; Alternatively, determine the number of PDCCH repeated transmissions based on a third predefined condition.

12. The method according to claim 2, wherein Determine the SearchSpace corresponding to the PDCCH repeated transmission, including: Receive a fourth piece of information, which is used to indicate the SearchSpace corresponding to the PDCCH repeated transmission, and the fourth piece of information includes at least one of the following: fourth high-layer signaling configuration, fourth downlink broadcast information indication, fourth downlink control information indication, fourth MAC CE indication, the first SearchSpace configuration corresponding to the PDCCH repeated transmission; Alternatively, determine the SearchSpace corresponding to the PDCCH repeated transmission based on a fourth predefined condition.

13. The method according to claim 12, wherein The fourth high-layer signaling or the fourth downlink control information includes at least one of the following: the SearchSpace number corresponding to the PDCCH repeated transmission, the SearchSpace number associated with the PDCCH repeated transmission; Among them, the SearchSpace with the same numerical value of the SearchSpace number corresponding to the PDCCH repeated transmission is used for the same PDCCH repeated transmission; The SearchSpace number associated with the PDCCH repeated transmission indicates the SearchSpace other than the current SearchSpace that is used for the PDCCH repeated transmission.

14. The method according to claim 2, wherein Determine the CORESET corresponding to the PDCCH repeated transmission, including: Receive a fifth piece of information, which is used to indicate the CORESET corresponding to the PDCCH repeated transmission, and the fifth piece of information includes at least one of the following: fifth high-layer signaling configuration, fifth downlink broadcast information indication, fifth downlink control information indication, fifth MAC CE indication, the first CORESET configuration corresponding to the PDCCH repeated transmission; Alternatively, determine the CORESET corresponding to the PDCCH repeated transmission based on a fifth predefined condition.

15. The method according to claim 14, wherein The fifth high-layer signaling or the fifth downlink control information includes at least one of the following: the CORESET number corresponding to the PDCCH repeated transmission, the CORESET number associated with the PDCCH repeated transmission; Among them, a CORESET with the same numerical value of the CORESET number corresponding to the PDCCH repeated transmission is used for the same PDCCH repeated transmission; The CORESET number associated with the PDCCH repeated transmission indicates other CORESETs used for the PDCCH repeated transmission except the current CORESET.

16. The method according to claim 2, wherein Determining the CCE used for the PDCCH repeated transmission includes: Receiving sixth information, where the sixth information is used to indicate the CORESET corresponding to the PDCCH repeated transmission, and the sixth information includes at least one of the following: sixth high-layer signaling configuration, sixth downlink broadcast information indication, sixth downlink control information indication, sixth MAC CE indication, configured by the CORESET; Alternatively, based on a sixth predefined rule, determining the CCE used for the PDCCH repeated transmission.

17. The method according to claim 2, wherein The method further includes: Adding a parameter in the reserved bit of the physical broadcast channel PBCH message or the management information block MIB message to indicate the enabling of the PDCCH repeated transmission or the number of times of the PDCCH repeated transmission.

18. The method according to claim 2, wherein The method further includes: Indicating the PDCCH repeated transmission, the enabling of the PDCCH repeated transmission, the number of times of the PDCCH repeated transmission, the time-domain resource where the PDCCH repeated transmission is located, the SearchSpace corresponding to the PDCCH repeated transmission, the CORESET corresponding to the PDCCH repeated transmission, and the CCE used for the PDCCH repeated transmission by adding a new field in the high-layer signaling configuration, downlink broadcast information indication, downlink control information indication, MAC CE indication, configuration of the search space SearchSpace, CORESET configuration, CCE configuration, or by adding a parameter in the reserved bit.

19. A control channel transmission method, characterized in that, Applied to a network-side device, the method includes: Determining a PDCCH repeated transmission policy; Repeating the transmission of the PDCCH according to the PDCCH repeated transmission policy.

20. The method according to claim 19, wherein The method further includes: Based on a seventh predefined rule, determining the number of times of the PDCCH repeated transmission; Alternatively, determining the number of times of the PDCCH repeated transmission according to channel sensing; Alternatively, receiving terminal-reported information and determining the number of times of the PDCCH repeated transmission.

21. The method according to claim 20, wherein The determining the number of times of the PDCCH repeated transmission according to channel sensing includes: Receiving the uplink control information or uplink data information of the terminal and determining the uplink reception packet loss rate; Determining the number of times of the PDCCH repeated transmission according to the uplink reception packet loss rate and the PDCCH reception success rate threshold.

22. The method according to claim 21, wherein The determining the number of times of the PDCCH repeated transmission according to the uplink reception packet loss rate and the PDCCH reception success rate threshold includes: 1-P fail-u S ≥P suc,min Among them, P fail- represents the uplink reception packet loss rate; P suc,min represents the PDCCH reception success rate threshold; S represents the PDCCH retransmission times.

23. The method according to claim 20, characterized in that, The method further includes: Determining the number of times of the PDCCH repeated transmission according to the PDCCH repeated transmission number requirement in the reported information; Alternatively, determining the number of times of the PDCCH repeated transmission according to the PDCCH reception packet loss rate in the reported information and the PDCCH reception success rate threshold.

24. The method according to claim 23, wherein The determining the number of times of the PDCCH repeated transmission according to the PDCCH reception packet loss rate in the reported information and the PDCCH reception success rate threshold includes: 1-P fail-d S ≥P suc,min Among them, P fail-d represents the packet loss rate of PDCCH reception; P suc,min represents the threshold of PDCCH reception success rate; S represents the number of PDCCH retransmission times.

25. The method according to claim 21 or 23, characterized in that, The method further includes: Use the minimum number of PDCCH retransmissions that meet the PDCCH reception success rate threshold as the number of PDCCH retransmissions.

26. A terminal device, characterized in that, It includes: A first determination module, configured to determine PDCCH retransmission according to network-side configuration or indication.

27. A network-side device, characterized in that, It includes: A second determination module, configured to determine a PDCCH retransmission policy; A transmission module, configured to retransmit PDCCH according to the PDCCH retransmission policy.

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