High and low frequency cross carrier scheduling method and device, terminal and base station

Abstract

The invention discloses a high and low frequency cross carrier scheduling method and device, a terminal and a base station. The method comprises the following steps that: the base station sends scheduling information corresponding to a service to terminal UE (User Equipment) through a low frequency carrier; after the UE receives the scheduling information, the base station sends service data corresponding to the scheduling information to the UE through a high-frequency carrier; and the base station receives response information fed back by the UE according to the service data through a low-frequency carrier. In the method, a base station sends scheduling information corresponding to a service to terminal UE through a low-frequency carrier; and after the UE receives the scheduling information, the service data corresponding to the scheduling information is sent to the UE through the high-frequency carrier, so that the technical effect of interacting with the terminal according to the scheduling information is realized, and the existing technical problem is solved.

Description

[0001] This invention application is a divisional application of the invention application with the application date of August 1, 2019, application number 201910707482.7, and invention name “A high- and low-frequency cross-carrier scheduling method, device, terminal and base station”. Technical Field

[0002] The present invention relates to the field of communication technologies, and in particular to a high- and low-frequency cross-carrier scheduling method, device, terminal, and base station. Background Art

[0003] With the increasing popularity of smart devices and the diversification of services, the demand for mobile data is growing exponentially. In the near future, with the significant growth of smart devices and tablets and the increase in data traffic consumed by individual users, future networks will need to provide 1,000 times the capacity of existing networks. 5G NR high- and low-frequency networking scenarios are a key application of 5G. In CA (Carrier Aggregation) scenarios, where low-frequency band (FR1) and high-frequency band (FR2) are jointly networked, due to limited high-frequency uplink coverage, carrying control signaling in the low-frequency band and services in the high-frequency band can effectively improve system robustness.

[0004] The current problems with scheduling high-frequency carriers with low-frequency carriers are: limited coverage of high-frequency carriers and how to notify the terminal of multi-slot related scheduling information. Summary of the Invention

[0005] The embodiments of the present invention provide a high- and low-frequency cross-carrier scheduling method, apparatus, terminal, and base station, which are used to notify the terminal of scheduling information related to multiple time slots, thereby overcoming the problem of limited high-frequency band carrier coverage.

[0006] In a first aspect, a first embodiment of the present invention provides a high-frequency and low-frequency cross-carrier scheduling method, which is applied to a base station side. The method includes the following steps: The base station sends scheduling information corresponding to the service to the terminal UE via the low-frequency carrier; After the UE receives the scheduling information, the base station sends service data corresponding to the scheduling information to the UE through a high-frequency carrier; The base station receives, through a low-frequency carrier, response information fed back by the UE according to the service data.

[0007] Optionally, when the service is carrier scheduling, the scheduling information sent by the base station to the terminal through the low-frequency carrier includes: high-frequency carrier physical downlink shared channel PDSCH service parameters, quasi-position QCL relationship of the PDSCH service, and terminal feedback hybrid automatic repeat request feedback HARQ parameters.

[0008] Optionally, the PDSCH service parameter includes a time slot parameter at which the PDSCH service starts, wherein the time slot parameter at which the PDSCH service starts is determined according to a subcarrier spacing of a high frequency carrier; The terminal feedback HARQ parameter includes a feedback time slot for the terminal to feedback HARQ-ACK, wherein the feedback time slot is determined according to the subcarrier spacing of the low-frequency carrier; The QCL relationship of the PDSCH service includes a high frequency carrier ID and a high frequency carrier reference signal.

[0009] Optionally, before the base station sends scheduling information corresponding to the service to the terminal through the low-frequency carrier, the method further includes: The base station calculates the time slot position at which the PDSCH service starts according to the scheduling information of the low-frequency carrier; The scheduling time slot length is determined according to the time slot position at which the PDSCH service starts and the subcarrier spacing of the high frequency carrier.

[0010] Optionally, the base station sending scheduling information corresponding to the service to the UE through the low-frequency carrier includes: The base station notifies the terminal of physical downlink control channel PDCCH control signaling including the time slot position and time slot length through downlink control information DCI of the low frequency carrier.

[0011] Optionally, the base station sending service data corresponding to the scheduling information to the UE through a high frequency carrier includes: The base station sends PDSCH service data to the terminal through a high frequency carrier according to the time slot position and the time slot length.

[0012] Optionally, the receiving, by the base station through the low-frequency carrier, response information fed back by the UE according to the service data includes: The base station receives, through a low-frequency carrier, HARQ response information fed back by the UE according to the feedback time slot based on the service data.

[0013] Optionally, when the service is reporting aperiodic channel state information CSI report, the scheduling information sent by the base station to the terminal through the low-frequency carrier includes: The relationship between the resource location of the channel state information reference signal CSI-RS resource in the high frequency time slot and the QCL of the received CSI-RS.

[0014] Optionally, before the base station sends scheduling information corresponding to the service to the terminal through the low-frequency carrier, the method further includes: The base station calculates the position of the CSI-RS time slot based on the time slot of the low-frequency carrier scheduling system information block DCI and high-layer parameters.

[0015] Optionally, the base station sends service data corresponding to the scheduling information to the UE through a high-frequency carrier, including: the base station sends CSI-RS resources to the UE through a high-frequency carrier according to the position of the CSI-RS time slot.

[0016] Optionally, the base station receives, through a low-frequency carrier, response information fed back by the UE based on the service data, including: the base station receives, through a low-frequency carrier, a CSI measurement report reported by the UE on a PUCCH or PUSCH through a low-frequency carrier.

[0017] Optionally, the base station sending scheduling information corresponding to the service to the UE through the low-frequency carrier further includes: The base station notifies the UE of the beam direction for receiving the physical downlink control channel PDCCH service through low-frequency carrier RRC signaling or MAC control command MAC-CE.

[0018] In a second aspect, a second embodiment of the present invention proposes a high-frequency and low-frequency cross-carrier scheduling method, which is applied to the terminal side. receiving scheduling information corresponding to services sent by a base station via a low-frequency carrier; After the scheduling information is received, receiving service data corresponding to the scheduling information sent by the base station through a high frequency carrier according to the scheduling information; A service response is performed according to the service data, and response information is fed back to the base station via a low-frequency carrier.

[0019] Optionally, the receiving base station sends scheduling information corresponding to the service through the low-frequency carrier, including: receiving the physical downlink control channel PDCCH service in the beam direction indicated by the base station through the low-frequency carrier RRC signaling or MAC control command MAC-CE, and the PDCCH service carries the scheduling information.

[0020] Optionally, when the service is carrier scheduling, performing a service response according to the service data and feeding back response information to the base station through a low-frequency carrier includes: Receive and decode the PDSCH service sent by the base station through the high-frequency carrier; Feedback HARQ response information at a feedback time indicated by the service data through a low-frequency carrier according to the decoding result.

[0021] Optionally, when the service is reporting a non-periodic channel state information CSI report, performing a service response according to the service data and feeding back response information to the base station through a low-frequency carrier includes: receiving a CSI-RS signal sent by a base station, and performing measurement based on the CSI-RS signal; After the measurement is completed, the CSI measurement report is reported on the PUCCH or PUSCH via the low-frequency carrier.

[0022] In a third aspect, a third embodiment of the present invention provides a high- and low-frequency cross-carrier scheduling device, the device applied to the base station side including: An information sending module is configured to send scheduling information corresponding to a service to a terminal UE via a low-frequency carrier. After the UE receives the scheduling information, the base station sends service data corresponding to the scheduling information to the UE via a high-frequency carrier. The information receiving module is configured to receive, via a low-frequency carrier, response information fed back by the UE based on the service data.

[0023] In a fourth aspect, a fourth embodiment of the present invention provides a high- and low-frequency cross-carrier scheduling device, where the device applied to a terminal side includes: A data receiving module is configured to receive scheduling information corresponding to a service sent by a base station via a low-frequency carrier, and after receiving the scheduling information, receive service data corresponding to the scheduling information sent by the base station via a high-frequency carrier according to the scheduling information; The data processing module is used to perform a service response according to the service data and feed back response information to the base station via a low-frequency carrier.

[0024] In a fifth aspect, the fifth embodiment of the present invention proposes a base station, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the scheduling method described in the first embodiment when executed by the processor.

[0025] In a sixth aspect, a sixth embodiment of the present invention proposes a terminal comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the scheduling method described in the second embodiment when executed by the processor.

[0026] In this embodiment of the present invention, a base station transmits scheduling information corresponding to a service to a terminal (UE) via a low-frequency carrier. After the UE receives the scheduling information, the base station transmits service data corresponding to the scheduling information to the UE via a high-frequency carrier. The base station then receives response information fed back by the UE based on the service data via the low-frequency carrier. This notifies the terminal of the scheduling information, effectively overcoming the limited uplink high-frequency carrier coverage issue. By carrying control signaling in the low-frequency band, the system achieves higher stability. This solves existing technical problems.

[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are specifically listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference symbols are used throughout the drawings to represent the same components. In the drawings: Figure 1 This is a flow chart of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the relationship between high and low frequency carrier scheduling time slots according to the first embodiment of the present invention; Figure 3 This is a flow chart of the third embodiment of the present invention; Figure 4 This is a flow chart of the sixth embodiment of the present invention; Figure 5 It is a schematic diagram of the process of the present invention; Figure 6 Schematic diagram of the structure of the seventh embodiment of the present invention. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] First embodiment The first embodiment of the present invention provides a high-frequency and low-frequency cross-carrier scheduling method, such as Figure 1 As shown, the following steps are included: Step S2: The base station sends scheduling information corresponding to the service to the terminal UE via the low-frequency carrier.

[0031] Step S3: After the UE receives the scheduling information, the base station sends the service data corresponding to the scheduling information to the UE via a high-frequency carrier.

[0032] Step S4: The base station receives, via a low-frequency carrier, response information fed back by the UE based on the service data.

[0033] Specifically, the high- and low-frequency cross-carrier scheduling method in this embodiment is applied to the base station side. This method can notify the UE of scheduling information carried on the low-frequency carrier according to different service requirements. This can effectively overcome the problem of limited uplink high-band carrier coverage while taking advantage of the high peak throughput brought by the large bandwidth of the downlink high-band carrier. By carrying control signaling on the low-frequency band, the system can achieve higher stability.

[0034] In an optional embodiment of the present invention, before step S2, the scheduling method may further include step S0: configuring the base station according to the service type, and sending the configuration information to the UE via a low-frequency carrier.

[0035] In an optional embodiment of the present invention, when the service is carrier scheduling, the scheduling information includes: high-frequency carrier physical downlink shared channel PDSCH service parameters, quasi-position QCL relationship of the PDSCH service, and terminal feedback hybrid automatic repeat request feedback HARQ parameters.

[0036] Specifically, when scheduling the carrier, the base station indicates the time slot of the PDSCH service carried by the UE on the high-frequency carrier, the QCL relationship of the UE receiving the PDSCH, and the time slot of the UE feedback HARQ-ACK on the low-frequency carrier through the physical downlink control channel PDCCH downlink control information DCI on the low-frequency carrier.

[0037] In this embodiment, the high frequency carrier PDSCH service parameters include: a time slot parameter for starting uploading of the high frequency carrier PDSCH service; The time slot parameter for starting uploading of the high frequency carrier PDSCH service is determined according to the subcarrier spacing of the high frequency carrier.

[0038] Specifically, when the carrier is scheduled, such as Figure 2 As shown, the base station configures the time slot parameter K0 of the starting position of the PDSCH service transmission time slot in the radio resource control RRC signaling parameter, where the time slot parameter K0 is based on the number of time slots of the high-frequency carrier, and the value can be 0, 1, 2... etc. The base station notifies the UE of a time slot length of DCI scheduled on the high-frequency carrier in the downlink control information DCI. The time slot length is based on the high-frequency carrier subcarrier spacing. One time slot length can include one or more time slot numbers, for example, one time slot length can include three or four time slot numbers.

[0039] The terminal feedback HARQ parameter includes a feedback time slot for the terminal to feedback HARQ-ACK, wherein the feedback time slot is determined according to the subcarrier spacing of the low-frequency carrier; Specifically, when carrier scheduling is performed, the K1 value indicated by the HARQ-ACK feedback field in the PDCCH DCI is in units of the number of time slots of the low-frequency carrier, and takes values ​​of 0, 1, 2, ..., etc., where the K1 value represents the time interval parameter for the PDSCH to receive the terminal's feedback HARQ-ACK.

[0040] The QCL relationship of the PDSCH service includes a high frequency carrier ID and a high frequency carrier reference signal.

[0041] When the carrier is scheduled, the QCL relationship in the TCI-state indicated by the TCI field in the PDCCH DCI uses the ID and reference signal of the high frequency carrier to fill in the SSB and CSI-RS resource index on the high frequency carrier.

[0042] By adopting the above technical means, by introducing a method for cross-carrier scheduling between the low-frequency band carrier CC1 and the high-frequency band carrier CC2, a method for determining the base station HARQ process parameters K0 and K1 and a method for notifying the time slot parameters for simultaneous multi-slot scheduling are provided, which solves the technical problem of how to determine the parameter K related to the HARQ (Hybrid Automatic Repeat reQuest (HARQ)) scheduling process of scheduling a low-frequency carrier to a high-frequency carrier in the prior art.

[0043] Optionally, in an optional embodiment of the present invention, the base station sends scheduling information corresponding to the service to the UE through the low-frequency carrier, further comprising: The base station notifies the UE of the beam direction for receiving the physical downlink control channel PDCCH service through low-frequency carrier RRC signaling or MAC control command MAC-CE.

[0044] Specifically, when the service is carrier scheduled, the base station indicates the time slot of the PDSCH service carried by the UE on the high-frequency carrier, the QCL relationship of the UE receiving the PDSCH, and the time slot for feedback of HARQ-ACK on the low-frequency carrier through the PDCCH DCI information on the low-frequency carrier.

[0045] Specifically, the base station may notify the UE of the beam direction of the PDCCH service sent by the UE through the low-frequency carrier through the low-frequency carrier RRC signaling or the MAC control command MAC-CE.

[0046] In this embodiment, the base station may also notify the UE of multiple possible beam directions for receiving the PDSCH service on the high-frequency carrier CC2 in RRC signaling, so that the UE can select the corresponding beam direction for receiving the PDSCH service on CC2 from the multiple possibilities.

[0047] Optionally, in another optional embodiment of the present invention, when the service demand is carrier scheduling, step S1 is further included before step S2: calculating scheduling information of the high-frequency carrier based on the scheduling parameters of the low-frequency carrier according to the service type, including: The base station calculates the time slot position at which the PDSCH service starts according to the scheduling information of the low-frequency carrier; The scheduling time slot length is determined according to the time slot position at which the high frequency carrier PDSCH service uploading starts and the subcarrier spacing of the high frequency carrier.

[0048] Specifically, in this embodiment, the base station calculates the starting position of the PDSCH service time slot allocated on the high frequency carrier CC2 ,in n It is the time slot for low-frequency carrier CC1 to schedule DCI. is the low-frequency carrier scheduling coefficient, is the high frequency carrier scheduling coefficient, K0 is the time slot parameter, and the base station decides the time slot length for this scheduling , The subcarrier spacing of the high frequency carrier CC2 is used as a reference.

[0049] The base station sending scheduling information corresponding to the service to the UE through the low-frequency carrier includes: The base station notifies the terminal of the control signaling of the PDCCH including the time slot position and time slot length through the DCI of the low frequency carrier.

[0050] Specifically, the base station notifies the UE of the time slot length of the high-frequency carrier CC2 in the DCI of the low-frequency carrier CC1. (Value range 1- time slot).

[0051] Optionally, the base station sending service data corresponding to the scheduling information to the UE through a high frequency carrier includes: The base station sends the PDSCH service to the terminal through a high frequency carrier according to the time slot position and time slot length.

[0052] Specifically, the base station is in the time slot position of carrier CC2 Start sending PDSCH service, the time slot length is .

[0053] Specifically, the base station sends the scheduling information corresponding to the service to the UE via the low-frequency carrier, which can be: the base station notifies the UE in the RRC signaling of the time slot parameters K0 and time slot length of the start of the PDSCH service transmission on CC2 ; The base station notifies the UE of the value range of the feedback time slot parameter K1 of the downlink data on CC1 in the RRC signaling; The base station notifies the UE of the various possible beam directions for receiving PDSCH services on CC2 in the RRC signaling.

[0054] In another optional embodiment of the present invention, step S4: the base station receives the response information fed back by the UE based on the service data through a low-frequency carrier, including: the base station receives the HARQ response information fed back by the UE based on the service data according to the feedback time slot through a low-frequency carrier.

[0055] Second embodiment Based on the first embodiment, the second embodiment of the present invention proposes a high-frequency and low-frequency cross-carrier scheduling method, which is applied to the terminal side and includes the following steps: receiving scheduling information corresponding to services sent by a base station via a low-frequency carrier; After the scheduling information is received, receiving service data corresponding to the scheduling information sent by the base station through a high frequency carrier according to the scheduling information; A service response is performed according to the service data, and response information is fed back to the base station via a low-frequency carrier.

[0056] Optionally, a physical downlink control channel PDCCH service is received in a beam direction indicated by the base station through low-frequency carrier RRC signaling or a MAC control command MAC-CE, and the PDCCH service carries the scheduling information.

[0057] Specifically, the UE can receive the PDCCH in the beam direction corresponding to the TCI-state indicated by the RRC signaling sent by the base station through the low-frequency carrier or the MAC-CE.

[0058] In this embodiment, the UE can also select the corresponding beam direction for receiving the PDSCH service on CC2 based on the multiple possible beam directions for receiving the PDSCH service carried on the high-frequency carrier CC2 notified by the base station in the RRC signaling. The UE can receive the PDSCH service based on the selected beam direction for receiving the PDSCH service.

[0059] In an optional embodiment of the present invention, when the service is carrier scheduling, performing a service response according to the service data and feeding back response information to the base station through a low-frequency carrier includes: Receive and decode the PDSCH service sent by the base station through the high-frequency carrier; Feedback response information at a feedback time indicated by the service data through a low-frequency carrier according to the decoding result.

[0060] Specifically, the solution is to receive and decode the PDSCH service sent by the base station through the high-frequency carrier; If the decoding is successful, the UE feeds back an ACK at the low-frequency carrier CC1 PDSCH-to-HARQ_feedback timingindicator time; otherwise, it feeds back a NACK.

[0061] Specifically, during the specific implementation process, the HARQ-ACK field can also be used as another feedback method. If the feedback HARQ-ACK=1, it means that the decoding is successful. If the feedback HARQ-ACK=0, the decoding is unsuccessful, which corresponds to the aforementioned feedback ACK or NACK respectively.

[0062] In this embodiment, after the UE completes receiving the scheduling information, the UE receives the service data corresponding to the scheduling information sent by the base station through the high-frequency carrier according to the scheduling information, performs a service response according to the service data, and feeds back the response information to the base station through the low-frequency carrier.

[0063] Specifically, the UE receives the PDSCH service according to the time slot resources allocated by the PDCCH DCI on CC1; the beam direction of the UE receiving the PDSCH on CC2 is obtained by the TCI field in the DCI; the UE feeds back HARQ-ACK on the uplink PUCCH / PUSCH on CC1 according to the HARQ feedback time indication in the DCI.

[0064] Third embodiment On the basis of the second embodiment, the third embodiment of the present invention proposes a high-low frequency cross-carrier method, such as Figure 3 As shown, the following steps are included: Step S100: The base station configures the transmission time slot start position on the high frequency carrier in the K0 field in the RRC signaling: PDSCH-Config->PDSCH-TimeDomainResourceAllocation information element. The number of time slots that K0 takes is based on the subcarrier spacing of the PDSCH (for 120K subcarrier spacing, ) is a reference, the value range of K0 is (0..32); The base station indicates the K1 parameter in the HAAQ-ACK process in the RRC signaling PUCCH-Config->dl-DataToUL-ACK. The number of K1 time slots is based on the subcarrier spacing of the low-frequency carrier (for 30K subcarrier spacing, ) is used as a reference, the value range of K1 is (0..15); The base station fills in the low-frequency carrier ID and low-frequency carrier reference signal (such as SSB, CSI-RS) in TCI-state in the RRC signaling ControlResourceSet->tci-StatesPDCCH-ToAddList; The base station fills in the high-frequency carrier ID and high-frequency carrier reference signal (such as SSB, CSI-RS) in the TCI-state in the RRC signaling PDSCH-Config->tci-StatesToAddModList. After these parameters are configured, the UE is notified.

[0065] Step S101: The base station calculates the starting position of the PDSCH service time slot allocated on the high frequency carrier CC2 ,in It is the time slot for low-frequency carrier CC1 to schedule DCI; the base station decides the time slot length for this scheduling , The subcarrier spacing of the high frequency carrier CC2 is used as a reference.

[0066] Step S102: The base station notifies the UE of the time slot length of the high frequency carrier CC2 in the DCI of the low frequency carrier CC1. (Value range 1- Time slot), time domain resource assignment, frequency domain resource assignment, PDSCH-to-HARQ_feedback timing indicator (value range: 0-15), PDSCH QCL relationship indication Transmission configuration indication. The reference signal in the TCI-states reflecting the PDSCH QCL relationship is the SSB or CSI-RS resource index of carrier CC2; Step S103: The UE receives the PDCCH in the beam direction corresponding to the TCI-state indicated by the RRC signaling or MAC-CE; Step S104: The base station is in the time slot position of carrier CC2 Start sending PDSCH service, the time slot length is ; Step S105: UE receives and decodes PDSCH; Step S106: If the decoding is successful, the UE feeds back an ACK at the PDSCH-to-HARQ_feedback timingindicator time of carrier CC1; otherwise, it feeds back a NACK.

[0067] Therefore, during carrier scheduling, the base station notifies the UE of the time slot parameters K0 and time slot length for the start of PDSCH service transmission on CC2 in RRC signaling. ; The base station notifies the UE of the value range of the downlink data feedback time slot parameter K1 on CC1 in the RRC signaling; The base station notifies the UE of the various possible beam directions for receiving PDSCH services on CC2 in the RRC signaling.

[0068] The UE receives the PDSCH service on CC2 according to the time slot resources allocated by the PDCCH DCI on CC1. The beam direction of the UE receiving PDSCH on CC2 is obtained by the TCI field in the DCI. The UE feeds back HARQ-ACK on the uplink PUCCH / PUSCH on CC1 according to the HARQ feedback time indication in the DCI.

[0069] Fourth embodiment The fourth embodiment of the present invention proposes a high-frequency and low-frequency cross-carrier scheduling method. Different from the first embodiment, in this embodiment, the service demand is to report a non-periodic channel state information CSI report.

[0070] In this embodiment, the scheduling information sent by the base station to the terminal via the low-frequency carrier includes: the resource location of the channel state information reference signal CSI-RS resource in the high-frequency time slot and the QCL relationship of the received CSI-RS.

[0071] Specifically, when reporting aperiodic CSI reports, the base station indicates the UE the resource location of the CSI-RS (Channel State Information-Reference Signal) resource on the high-frequency time slot and the QCL relationship of the received CSI-RS through the PDCCH DCI information on the low-frequency carrier.

[0072] The base station sends scheduling information corresponding to the service to the UE through the low-frequency carrier, further comprising: The base station notifies the UE of the beam direction for receiving the physical downlink control channel PDCCH service through low-frequency carrier RRC signaling or MAC control command MAC-CE.

[0073] Specifically, the base station may notify the UE of the beam direction of the PDCCH service sent by the UE through the low-frequency carrier through the low-frequency carrier RRC signaling or the MAC control command MAC-CE.

[0074] In this embodiment, the base station may also notify the UE to report a CSI measurement report through a CSI request in CC1 DCI, and notify the UE of a beam direction for receiving CSI-RS through a MAC CE command.

[0075] Specifically, when reporting a non-periodic CSI report, the base station configures the TCI-state list of the CSI-RS beam direction for the UE to receive through RRC signaling, and then maps the CSI request field in the DCI through the MAC CE command to indicate the specific beam direction of the UE to receive the CSI-RS.

[0076] Optionally, in an optional embodiment of the present invention, before the base station sends scheduling information corresponding to the service to the terminal through the low-frequency carrier, the method further includes: The base station calculates the position of the CSI-RS time slot based on the time slot of the low-frequency carrier scheduling downlink control information DCI and high-layer parameters.

[0077] Specifically, the base station calculates the time slot for sending CSI-RS resources on CC2 through high-level parameters, and calculates the position of the CSI-RS time slot allocated on the high-frequency carrier CC2. , where n is the timeslot in which the low-frequency carrier CC1 schedules DCI, and X is configured by the high-level parameter aperiodicTriggeringOffset.

[0078] In another optional embodiment of the present invention, the base station sends service data corresponding to the scheduling information to the UE via a high-frequency carrier, including: the base station sends CSI-RS resources to the UE according to the position of the CSI-RS time slot.

[0079] Specifically, the base station is in the time slot position of carrier CC2 Start sending CSI-RS at In an optional embodiment of the present invention, the base station receives, through a low-frequency carrier, response information fed back by the UE based on the service data, including: the base station receives, through a low-frequency carrier, a CSI measurement report reported by the UE on the PUCCH or PUSCH through the low-frequency carrier.

[0080] Fifth embodiment Based on the fourth embodiment, the fifth embodiment of the present invention proposes a high-low frequency cross-carrier scheduling method, which is applied to the terminal side. Unlike the second embodiment, in this embodiment, the service demand is to report a non-periodic channel state information CSI report, including the following steps: receiving scheduling information corresponding to services sent by a base station via a low-frequency carrier; After the scheduling information is received, receiving service data corresponding to the scheduling information sent by the base station through a high frequency carrier according to the scheduling information; A service response is performed according to the service data, and response information is fed back to the base station via a low-frequency carrier.

[0081] In an optional embodiment of the present invention, receiving scheduling information corresponding to a service sent by the base station via a low-frequency carrier includes receiving a physical downlink control channel (PDCCH) service in a beam direction indicated by the base station via low-frequency carrier RRC signaling or a MAC control command (MAC-CE), the PDCCH service carrying the scheduling information.

[0082] Specifically, the UE receives the PDCCH in the beam direction corresponding to the TCI-state indicated by the RRC signaling sent by the base station or the MAC-CE.

[0083] In this embodiment, the UE may also report a CSI measurement report based on a CSI request notification in CC1 DCI sent by the base station.

[0084] When reporting a non-periodic CSI report, specifically, the UE obtains the specific beam direction of the received CSI-RS according to the TCI-state list of the receiving CSI-RS beam direction configured by the base station through RRC signaling, and according to the indication of the CSI request field in the DCI mapped by the base station through the MAC CE command.

[0085] In a case where the service is reporting aperiodic channel state information (CSI) report, performing a service response according to the service data and feeding back response information to the base station through a low-frequency carrier include: receiving a CSI-RS signal sent by a base station, and performing measurement based on the CSI-RS signal; After the measurement is completed, a CSI measurement report is reported on the PUCCH or PUSCH of the low-frequency carrier CC1.

[0086] Specifically, the UE receives CSI-RS signals on CC2 and reports CSI reports on the PUCCH / PUSCH of CC1. The beam direction of the UE receiving CSI-RS is obtained by mapping the TCI states configured by the base station at higher layers via MAC CE commands and the CSI request field in the DCI.

[0087] Sixth embodiment Based on the fifth embodiment, the sixth embodiment of the present invention proposes a high-low frequency cross-carrier scheduling method, such as Figure 4 FIG. 1 is a flow chart of an embodiment of cross-carrier scheduling aperiodic CSI reporting according to the present invention, which includes the following steps: Step S200: The base station configures the aperiodic triggering slot offset X in the RRC signaling CSI-MeasConfig->NZP-CSI-RS-ResourceSet->aperiodicTriggeringOffset information element. The value range of X is 0-6. The base station also configures the TCI-state for the UE to receive CSI-RS resources in the RRC signaling CSI-MeasConfig->CSI-AperiodicTriggerStatList. The reference signal in the TCI-state configuration is the SSB and CSI-RS resource index of the high-frequency carrier CC2. After these parameters are configured, the UE is notified.

[0088] Step S201: The base station calculates the position of the CSI-RS time slot allocated on the high frequency carrier CC2 , where n is the timeslot in which the low-frequency carrier CC1 schedules DCI, and X is configured by the high-level parameter aperiodicTriggeringOffset, with a value range of 0-6.

[0089] Step S202: The base station notifies the UE in the DCI of the low-frequency carrier CC1 to perform CSI reporting measurements; the MAC CE command notifies the UE of the beam direction of the CSI-RS to be received.

[0090] Step S203: The UE receives the PDCCH in the beam direction corresponding to the TCI-state indicated by the RRC signaling or MAC-CE.

[0091] Step S204: The base station is in the time slot position of carrier CC2 Start sending CSI-RS at Step S205: The UE receives the CSI-RS signal and performs measurement.

[0092] Step S206: After the UE completes the measurement, it reports a CSI measurement report on the PUCCH or PUSCH of the low-frequency carrier CC1.

[0093] Therefore, when the base station requires the UE to report non-periodic channel measurement information, the base station notifies the UE to report the CSI measurement report through the CSI request in the CC1 DCI; the base station calculates the time slot for sending the CSI-RS resource on CC2 based on high-layer parameters.

[0094] The UE receives the CSI-RS signal on CC2 and reports the CSI report on the PUCCH / PUSCH of CC1. The beam direction of the received CSI-RS is notified to the UE through the mapping between the TCI states configured by the higher layer and the CSI request field in the DCI via the MAC CE command.

[0095] By introducing a cross-carrier scheduling method between the low-band carrier CC1 and the high-band carrier CC2, the technical problem of how to trigger the channel measurement aperiodic CSI-RS report and how to notify the terminal is solved.

[0096] In summary, if Figure 5 As shown in the flowchart of the present invention, by scheduling a high-frequency carrier or triggering CSI reporting on the gNB's low-frequency carrier, the UE reports HARQ-ACK and aperiodic CSI reports on the low-frequency carrier PUCCH / PUSCH. This method solves the technical problems of determining the parameter K related to the HARQ (Hybrid Automatic Repeat reQuest, HARQ) scheduling process when a low-frequency carrier schedules a high-frequency carrier, triggering aperiodic CSI-RS reporting for channel measurement, and notifying the UE of the number of time slots related to multi-slot scheduling.

[0097] Seventh embodiment A seventh embodiment of the present invention provides a high-frequency and low-frequency cross-carrier scheduling device, which is applied to a base station side. The device includes: The information sending module is used to send scheduling information corresponding to the service to the terminal UE through a low-frequency carrier. After the UE receives the scheduling information, the base station sends the service data corresponding to the scheduling information to the UE through a high-frequency carrier.

[0098] The information receiving module is configured to receive, via a low-frequency carrier, response information fed back by the UE based on the service data.

[0099] This device can notify UEs of scheduling information carried on high-frequency carriers based on different service requirements, effectively overcoming the limited uplink high-band carrier coverage while also taking advantage of the high peak throughput offered by the large bandwidth of downlink high-band carriers. By carrying control signaling on low-frequency bands, the system can achieve greater stability.

[0100] In an optional embodiment of the present invention, Figure 6 As shown, the apparatus may further include: a configuration module for configuring the base station according to the service type; The data processing module is used to calculate the scheduling information of the high-frequency carrier based on the scheduling parameters of the low-frequency carrier according to business requirements.

[0101] Optionally, when the service demand is carrier scheduling, the scheduling information includes: High-frequency carrier physical downlink shared channel (PDSCH) service parameters, quasi-position QCL relationship of PDSCH services, and terminal feedback hybrid automatic repeat request (HARQ-ACK) parameters; Specifically, when scheduling the carrier, the base station indicates the time slot of the PDSCH service carried by the UE on the high-frequency carrier, the QCL relationship of the UE receiving the PDSCH, and the time slot of the HARQ-ACK feedback on the low-frequency carrier through the physical downlink control channel PDCCH system information block DCI information on the low-frequency carrier.

[0102] Optionally, the high frequency carrier PDSCH service parameters include: a time slot parameter for starting uploading of the high frequency carrier PDSCH service; The time slot parameter for starting uploading of the high frequency carrier PDSCH service is determined according to the subcarrier spacing of the high frequency carrier.

[0103] Specifically, when the carrier is scheduled, the time slot parameter K0 at the start of the PDSCH service configured by the radio resource control RRC parameter is in units of the number of time slots of the high-frequency carrier, and takes values ​​0, 1, 2... etc.; the base station notifies the UE in the DCI of the number of time slots scheduled by a DCI on the high-frequency carrier, and the length of the time slot number is based on the high-frequency carrier subcarrier spacing.

[0104] The terminal feedback HARQ-ACK parameters include HARQ-ACK feedback time interval parameters, and the feedback time interval parameters are determined according to the subcarrier spacing of the low-frequency carrier.

[0105] When carrier scheduling is performed, the K1 value indicated by the HARQ-ACK feedback field in the PDCCH DCI is in units of the number of time slots of the low-frequency carrier and can take values ​​of 0, 1, 2, ..., etc.

[0106] The QCL relationship of the PDSCH service includes a high frequency carrier ID and a high frequency carrier reference signal.

[0107] When the carrier is scheduled, the QCL relationship in the TCI-state indicated by the TCI field in the PDCCH DCI uses the ID and reference signal of the high frequency carrier to fill in the SSB and CSI-RS resource index on the high frequency carrier.

[0108] By adopting the above scheduling information and introducing a method for cross-carrier scheduling between the low-frequency band carrier CC1 and the high-frequency band carrier CC2, a method for determining the base station HARQ process parameters K0 and K1 and a method for notifying the time slot parameters for simultaneous multi-slot scheduling are provided. This solves the technical problem of how to determine the parameter K related to the HARQ (Hybrid Automatic Repeat reQuest (HARQ)) scheduling process of scheduling a low-frequency carrier to a high-frequency carrier, which exists in the prior art.

[0109] Optionally, the data processing module is used to calculate the time slot position for the start of uploading the high-frequency carrier PDSCH service based on the time slot of the low-frequency carrier scheduling system information block DCI when the service demand is carrier scheduling; and determine the scheduling time slot length according to the time slot position for the start of uploading the high-frequency carrier PDSCH service and the subcarrier spacing of the high-frequency carrier.

[0110] Specifically, in this embodiment, the data processing module calculates the starting position of the PDSCH service time slot allocated on the high frequency carrier CC2 , where n is the time slot of the low-frequency carrier CC1 scheduling DCI, and the base station decides the time slot length of this scheduling , The subcarrier spacing of the high frequency carrier CC2 is used as a reference.

[0111] The information sending module is configured to notify the UE of the control signaling of the PDCCH including the scheduling time slot length via the DCI of the low frequency carrier.

[0112] Specifically, the information sending module notifies the UE of the time slot length of the high frequency carrier CC2 scheduling in the DCI of the low frequency carrier CC1. (Value range 1- time slot).

[0113] Optionally, the information sending module is further used to: Specifically, the information sending module sends the PDSCH service to the UE according to the scheduling time slot length and the time slot position of the high frequency carrier PDSCH service upload start time.

[0114] Eighth embodiment The eighth embodiment of the present invention proposes a high- and low-frequency cross-carrier scheduling device. Different from the seventh embodiment, in this embodiment, the service is reporting a non-periodic channel state information CSI report.

[0115] In this embodiment, the scheduling information includes: the resource location of the channel state information reference signal CSI-RS resource in the high frequency time slot and the QCL relationship of receiving the CSI-RS.

[0116] Specifically, when reporting aperiodic CSI reports, the base station indicates the UE the resource location of the CSI-RS (Channel State Information-Reference Signal) resource on the high-frequency time slot and the QCL relationship of the received CSI-RS through the PDCCH DCI information on the low-frequency carrier.

[0117] When reporting non-periodic CSI reports, the base station can configure the TCI-state list of the CSI-RS beam direction for the UE to receive through RRC signaling, or it can use the MAC CE command to indicate the specific beam direction of the UE to receive CSI-RS by mapping the CSI request field in the DCI.

[0118] Optionally, the data processing module is used to calculate the position of the channel state information reference signal CSI-RS time slot based on the time slot and high-layer parameters of the low-frequency carrier scheduling system information block DCI when the business requirement is to report a non-periodic channel state information CSI report.

[0119] The data processing module calculates the position of the CSI-RS time slot allocated on the high-frequency carrier CC2 , where n is the timeslot in which the low-frequency carrier CC1 schedules DCI, and X is configured by the high-level parameter aperiodicTriggeringOffset.

[0120] Optionally, the information sending module is further used to: send CSI-RS to the UE according to the position of the CSI-RS time slot.

[0121] Specifically, the information sending module is in the time slot position of carrier CC2 Start sending CSI-RS at

[0122] Ninth embodiment A ninth embodiment of the present invention provides a high-frequency and low-frequency cross-carrier scheduling device, which is applied to a terminal side and includes: The data receiving module is used to receive scheduling information corresponding to the service sent by the base station through the low-frequency carrier, and after the scheduling information is received, receive the service data corresponding to the scheduling information sent by the base station through the high-frequency carrier according to the scheduling information.

[0123] The data processing module is used to perform a service response according to the service data and feed back response information to the base station via a low-frequency carrier.

[0124] Tenth embodiment The tenth embodiment of the present invention proposes a base station, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the scheduling method of the first embodiment or the fourth embodiment when executed by the processor.

[0125] Eleventh embodiment The eleventh embodiment of the present invention proposes a terminal comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the scheduling method of the second embodiment or the fifth embodiment when executed by the processor.

[0126] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0127] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0128] Through the above description of the embodiments, those skilled in the art will clearly understand that the methods of the above embodiments can be implemented using software plus the necessary general-purpose hardware platform. Of course, hardware can also be used, but in many cases the former is the more preferred implementation method. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, or optical disk) and includes a number of instructions for enabling a terminal (such as a mobile phone, computer, server, air conditioner, or network device) to execute the methods described in the various embodiments of the present invention.

[0129] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A high-frequency and low-frequency cross-carrier scheduling method, applied to a base station side, the method comprising: Sending scheduling information corresponding to the service to the terminal via a low-frequency carrier; In response to the terminal receiving the scheduling information, sending service data corresponding to the scheduling information to the terminal through a high-frequency carrier; Response information fed back by the terminal according to the service data is received through a low-frequency carrier.

2. The method according to claim 1, characterized in that In response to the service being carrier scheduling, the scheduling information sent to the terminal through the low-frequency carrier includes at least one of the following: High frequency carrier physical downlink shared channel PDSCH service parameters; Quasi-position QCL relationship of PDSCH service; The terminal feeds back the parameters of the hybrid automatic repeat request (HARQ).

3. The method according to claim 2, characterized in that The PDSCH service parameters include a time slot parameter at which the PDSCH service starts, wherein the time slot parameter at which the PDSCH service starts is determined according to a subcarrier spacing of a high frequency carrier; The terminal feedback HARQ parameter includes a feedback time slot for the terminal to feedback HARQ-ACK, wherein the feedback time slot is determined according to the subcarrier spacing of the low-frequency carrier; The QCL relationship of the PDSCH service includes a high frequency carrier ID and a high frequency carrier reference signal.

4. The method according to claim 3, characterized in that Before sending the scheduling information corresponding to the service to the terminal through the low-frequency carrier, the method further includes: Determine the time slot position at which the PDSCH service starts according to the scheduling information of the low-frequency carrier; The scheduled time slot length is determined according to the time slot position at which the PDSCH service starts and the subcarrier spacing of the high frequency carrier.

5. The method according to claim 4, characterized in that The sending scheduling information corresponding to the service to the terminal through the low-frequency carrier includes: A physical downlink control channel (PDCCH) control signaling is sent to the terminal via downlink control information (DCI) of a low-frequency carrier, where the PDCCH control signaling includes the time slot position and the time slot length.

6. The method according to claim 5, characterized in that The sending the service data corresponding to the scheduling information to the terminal through the high frequency carrier includes: The PDSCH service data is sent to the terminal via a high frequency carrier according to the time slot position and the time slot length.

7. The method according to claim 3, characterized in that The receiving, through the low-frequency carrier, response information fed back by the terminal according to the service data, includes: HARQ response information fed back by the terminal is received through a low-frequency carrier, where the HARQ response information is information fed back by the terminal based on the service data according to the feedback time slot.

8. The method according to claim 1, characterized in that In response to the service being reporting a non-periodic channel state information CSI report, the scheduling information sent to the terminal through the low-frequency carrier includes: The relationship between the resource location of the channel state information reference signal CSI-RS resource in the high frequency time slot and the QCL of the received CSI-RS.

9. The method according to claim 8, characterized in that Before sending the scheduling information corresponding to the service to the terminal through the low-frequency carrier, the method further includes: The position of the CSI-RS time slot is calculated based on the time slot of the low-frequency carrier scheduling DCI and the high-layer parameters.

10. The method according to claim 9, characterized in that The sending the service data corresponding to the scheduling information to the terminal through the high frequency carrier includes: The CSI-RS resource is sent to the terminal via a high frequency carrier according to the position of the CSI-RS time slot.

11. The method according to claim 10, characterized in that The receiving, through the low-frequency carrier, response information fed back by the terminal according to the service data includes: A CSI measurement report sent by the terminal is received through a low-frequency carrier, where the CSI measurement report is sent on a PUCCH or a PUSCH through the low-frequency carrier.

12. The method according to claim 2 or 8, characterized in that The sending scheduling information corresponding to the service to the terminal through the low-frequency carrier includes: The terminal is notified of the beam direction of receiving the physical downlink control channel PDCCH service through low-frequency carrier RRC signaling or MAC control command MAC-CE.

13. A high-frequency and low-frequency cross-carrier scheduling method, applied to a terminal side, the method comprising: receiving scheduling information corresponding to services sent by a base station via a low-frequency carrier; In response to completion of receiving the scheduling information, receiving service data corresponding to the scheduling information and sent by the base station through a high frequency carrier according to the scheduling information; Response information is sent to the base station via a low-frequency carrier, where the response information determines a service response based on the service data.

14. The method according to claim 13, characterized in that The receiving base station sends scheduling information corresponding to the service through the low-frequency carrier, including: A physical downlink control channel PDCCH service is received, which is sent by a base station in a beam direction indicated by a low-frequency carrier RRC signaling or a MAC control command MAC-CE, wherein the PDCCH service carries the scheduling information.

15. The method according to claim 14, characterized in that In response to the service being carrier scheduled, the sending response information to the base station through the low-frequency carrier includes: Receive and decode the PDSCH service sent by the base station via the high frequency carrier; According to the decoding result, HARQ response information is sent to the base station at the feedback time indication according to the service data through the low frequency carrier.

16. The method according to claim 14, characterized in that In response to the service being reporting a non-periodic channel state information CSI report, the sending response information to the base station through the low-frequency carrier includes: receiving a CSI-RS signal sent by the base station; Performing measurement according to the CSI-RS signal; In response to the measurement completion, a CSI measurement report is sent to the base station on the PUCCH or PUSCH via the low frequency carrier.

17. A high-frequency and low-frequency cross-carrier scheduling device, applied to a base station, comprising: an information sending module, configured to send scheduling information corresponding to a service to a terminal via a low-frequency carrier, and in response to the terminal receiving the scheduling information, send service data corresponding to the scheduling information to the terminal via a high-frequency carrier; The information receiving module is used to receive response information fed back by the terminal based on the service data through a low-frequency carrier.

18. A high-frequency and low-frequency cross-carrier scheduling device, applied to a terminal side, the device comprising: a data receiving module, configured to receive scheduling information corresponding to a service sent by a base station via a low-frequency carrier, and in response to completion of receiving the scheduling information, receive service data corresponding to the scheduling information sent by the base station via a high-frequency carrier according to the scheduling information; The data processing module is used to send response information to the base station through a low-frequency carrier, and the response information determines the service response according to the service data.

19. A base station, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method according to any one of claims 1 to 12 when executed by the processor.

20. A terminal, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method according to any one of claims 13 to 16 when executed by the processor.

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