User equipment and communication method for semi-static dl scheduling

Abstract

A user equipment (UE) for semi-static downlink (DL) scheduling is provided. The UE can include a radio frequency (RF) signal processing device and a processor. The RF signal processing device is configured to receive radio resource control (RRC) information from a base station. The processor is coupled to the RF signal processing device. When the RF signal processing device receives a first configuration of semi-static DL scheduling and a higher layer parameter from the RRC information, the processor determines not to receive the semi-static DL scheduling in a set of symbols if the RF signal processing device does not receive a downlink control information (DCI) from the base station.

Description

Technical Field

[0001] This application relates generally to wireless communication technologies, and more specifically, to wireless communication technologies for semi-static downlink (DL) scheduling. Background Technology

[0002] Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), and Enhanced Data Rates for Global Evolution (EDGE) are also known as 2G cellular technologies. Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access 2000 (CDMA-2000), and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) are also known as 3G cellular technologies. Long Term Evolution (LTE), LTE-Advanced (LTE-A), and TD-LTE are also known as 4G cellular technologies. These cellular technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the municipal, national, regional, and even global levels. An example of an emerging telecommunications standard is 5G New Radio (NR). 5G NR is an enhancement set of the LTE mobile standard released by the Third Generation Partnership Project (3GPP). It is designed to better support mobile broadband internet access by improving spectrum efficiency, reducing costs, and enhancing service.

[0003] In 5G NR, due to the uncertainty of channel access in unlicensed bands, it is difficult for the UE to determine the existence of semi-static downlink (DL) scheduling from the network. Therefore, the UE may need to perform blind detection of semi-static DL scheduling. This may increase power consumption and reduce measurement accuracy. Therefore, a verification method for semi-static DL scheduling is needed. Summary of the Invention

[0004] User equipment (UE) and communication methods for semi-static DL scheduling are provided to overcome the above problems.

[0005] Embodiments of the present invention provide a UE for semi-static DL scheduling. The UE may include a radio frequency (RF) signal processing device and a processor. The RF signal processing device is configured to receive radio resource control (RRC) information from a base station. The processor is coupled to the RF signal processing device. When the RF signal processing device receives the first configuration and higher layer parameters of the semi-static DL scheduling from the RRC information, if the RF signal processing device has not received downlink control information (DCI) from the base station, the processor determines not to receive the semi-static DL scheduling in the symbol set.

[0006] In embodiments of the present invention, semi-static DL scheduling includes periodic channel-state-information reference-signal (P-CSI-RS) resources, semi-persistent CSI-RS (SP-CSI-RS) resources, or semi-persistent scheduled physical-downlink shared-channel (SPS-PDSCH).

[0007] In an embodiment of the present invention, the first configuration of the semi-static DL scheduling informs the UE to perform semi-static DL scheduling based on the periodically received symbol set.

[0008] In embodiments of the invention, higher-layer parameters indicate UE behavior that enables the determination of how semi-static DL scheduling is performed. The downlink channel or downlink signal is part of the DCI scheduling symbol set. The downlink channel or downlink signal is not part of the semi-static DL scheduling.

[0009] In embodiments of the present invention, the RF signal processing device is further configured to receive a second configuration that provides a slot-format-indicator (SFI) index field in a specific DCI format. In embodiments of the present invention, the RF signal processing device is further configured to receive a third configuration that provides a channel occupancy (CO) duration field in a specific DCI format. When the RF signal processing device receives a first configuration and higher-layer parameters for semi-static DL scheduling, but does not receive the second configuration and / or the third configuration, if the RF signal processing device has not received a DCI, the processor determines that it will not receive the semi-static DL scheduling in the symbol set.

[0010] Embodiments of the present invention provide a communication method for semi-static DL scheduling. The communication method for semi-static DL scheduling is applied to a UE. The semi-static DL scheduling communication method includes the following steps: the UE's RF signal processing device receives RRC information; when the RF signal processing device receives the first configuration and higher-layer parameters of the semi-static DL scheduling from the RRC information, if the RF signal processing device does not receive DCI from the base station, the UE's processor determines not to receive the semi-static DL scheduling in the symbol set.

[0011] Embodiments of the present invention provide a communication method for semi-static DL scheduling. The communication method for semi-static DL scheduling is applied to a base station. The semi-static DL scheduling communication method includes the following steps: the base station sends RRC information and DCI to inform the UE that it receives semi-static DL scheduling, wherein the base station sends a first configuration and higher-layer parameters for semi-static DL scheduling via the RRC information.

[0012] Other aspects and features of this application will become apparent to those skilled in the art upon reading the following description of specific embodiments of a UE and a communication method for semi-static DL scheduling. Attached Figure Description

[0013] A more comprehensive understanding of this application can be obtained by referring to the accompanying drawings and reading the following detailed description and examples, in which:

[0014] Figure 1 This is a block diagram of a wireless communication system 100 according to an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram illustrating the execution of semi-static DL scheduling according to an embodiment of the present invention.

[0016] Figure 3 This is a flowchart 300 illustrating a communication method for semi-static DL scheduling according to an embodiment of the present invention.

[0017] Figure 4 This is a flowchart 400 illustrating a communication method for semi-static DL scheduling according to another embodiment of the present invention. Detailed Implementation

[0018] The purpose of the following description is to illustrate the basic principles of this application and should not be construed as limiting. It should be understood that embodiments may be implemented in software, hardware, firmware, or any combination thereof. The terms “comprising,” “including,” “including,” and / or “comprising,” as used herein, specify the presence of the stated feature, integer, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof.

[0019] The following description represents the best intended mode for carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be construed as limiting. The scope of the invention is best determined by referring to the appended claims.

[0020] Figure 1 This is a block diagram of a wireless communication system 100 according to an embodiment of the present invention. Figure 1 As shown, the wireless communication system 100 may include a UE 110 and a base station 120. It should be noted that, in order to illustrate the concept of the present invention, Figure 1 A simplified block diagram is presented, showing only the elements relevant to the present invention. However, the present invention should not be limited to... Figure 1 The content shown.

[0021] like Figure 1 As shown, UE 110 may include at least a baseband signal processing device 111, a radio frequency (RF) signal processing device 112, a processor 113, a memory device 114, and an antenna module including at least one antenna. It should be noted that, in order to illustrate the concept of the invention, Figure 1 The UE 110 in the diagram presents a simplified block diagram, showing only the elements relevant to the present invention. However, the present invention should not be limited to... Figure 1 The content shown.

[0022] In embodiments of the present invention, UE 110 may be a smartphone, a personal data assistant (PDA), a pager, a laptop computer, a desktop computer, a wireless handheld device, or any computing device interface that includes wireless communication.

[0023] RF signal processing device 112 can receive RF signals via an antenna and process the received RF signals to convert them into baseband signals to be processed by baseband signal processing device 111, or receive baseband signals from baseband signal processing device 111 and convert the received baseband signals into RF signals for transmission to a peer communication apparatus. RF signal processing device 112 may include multiple hardware components to perform radio frequency conversion. For example, RF signal processing device 112 may include power amplifiers, mixers, analog-to-digital converters (ADCs), and digital-to-analog converters (DACs), etc.

[0024] The baseband signal processing device 111 can further process the baseband signal to obtain information or data sent by the peer communication device. The baseband signal processing device 111 may also include multiple hardware components to perform baseband signal processing.

[0025] Processor 113 can control the operation of baseband signal processing device 111 and RF signal processing device 112. According to embodiments of the present invention, processor 113 can also be arranged to execute program code of software modules in the corresponding baseband signal processing device 111 and / or RF signal processing device 112. Program code accompanying specific data in a data structure can also be referred to as a processor logic unit or stack instance during execution. Therefore, processor 113 can be considered as consisting of multiple processor logic units, each processor logic unit being used to execute one or more specific functions or tasks of the corresponding software module.

[0026] The memory device 114 can store the software and firmware program code, system data, user data, etc. of the UE 110. The memory device 114 can be volatile memory (e.g., random access memory (RAM)), non-volatile memory (e.g., flash memory or read-only memory (ROM)), hard disk; or any combination thereof.

[0027] According to embodiments of the present invention, the RF signal processing device 112 and the baseband signal processing device 111 can be collectively referred to as a radio module, capable of communicating with a wireless network to provide wireless communication services conforming to a predetermined Radio Access Technology (RAT). It should be noted that in some embodiments of the present invention, the UE 110 may be further extended to include more than one antenna and / or more than one radio module, and the present invention should not be limited to... Figure 1 The content shown.

[0028] In this embodiment, base station 120 may be a next-generation node B (gNB), node B (NB), evolved Node B (eNB), access point, or access terminal, but the invention is not limited thereto. In this embodiment, UE 110 may communicate with base station 120 via fifth-generation (5G) communication technology or 5G new radio (NR) communication technology, but the invention is not limited thereto.

[0029] In embodiments of the present invention, base station 120 may schedule or send semi-static DL scheduling to UE 110 through a higher layer (e.g., the Radio Resource Control (RRC) layer).

[0030] In this embodiment of the invention, semi-static DL scheduling may include periodic channel state information reference signal (P-CSI-RS) resources, semi-persistent CSI-RS (SP-CSI-RS) resources, or semi-persistently scheduled physical downlink shared channel (SPS-PDSCH), but the invention should not be limited thereto.

[0031] In embodiments of the present invention, when base station 120 needs to inform UE 110 to receive semi-static DL scheduling (i.e., UE 110 needs to perform corresponding DL reception), base station 120 can send a first configuration (or activation command or activation signaling) of the semi-static DL scheduling in the symbol set, and send to UE 110 a second configuration providing the slot-format-indicator (SFI) index field in a specific downlink control information (DCI) and / or a third configuration providing the channel occupancy (CO) duration field in a specific DCI format. In embodiments of the present invention, base station 120 can send the first configuration via RRC information. Furthermore, base station 120 can send the second and / or third configuration via RRC information. In embodiments of the present invention, the first configuration (or activation command or activation signaling) of the semi-static DL scheduling can indicate to UE 110 that it needs to receive the semi-static DL scheduling in the symbol set according to at least one cycle, and indicate the time occasion of the semi-static DL scheduling in each cycle. Furthermore, in embodiments of the present invention, the second configuration (i.e., the SFI index field in a specific DCI format) and / or the third configuration (i.e., the CO duration field in a specific DCI format) are configured to provide a duration to the UE 110. Specifically, the SFI index field and / or the CO duration field can indicate the duration for which the UE 110 needs to receive semi-static DL scheduling from the symbol set; that is, the SFI index field and / or the CO duration field can indicate the duration of channel occupancy initiated by the network. When the UE 110 obtains the duration, the UE 110 will know the existence of semi-static DL scheduling. Therefore, the UE 110 can perform semi-static DL scheduling during the aforementioned duration. The UE 110 may not receive semi-static DL scheduling outside the aforementioned duration; that is, the UE 110 can cancel semi-static DL scheduling.

[0032] In another embodiment of the present invention, when base station 120 needs to inform UE 110 to receive semi-static DL scheduling (i.e., UE 110 needs to perform corresponding DL reception), base station 120 can send UE 110 a first configuration (or activation command or activation signaling), higher-layer parameters, and DCI for the semi-static DL scheduling in the symbol set. In this embodiment of the present invention, as described above, the first configuration (or activation command or activation signaling) for semi-static DL scheduling can instruct UE 110 to receive semi-static DL scheduling according to at least one cycle, and indicate the timing of semi-static DL scheduling in each cycle. In this embodiment of the present invention, base station 120 can send the first configuration via RRC information.

[0033] Furthermore, in embodiments of the present invention, higher-layer parameters may indicate UE behavior that determines how to perform semi-static DL scheduling reception (e.g., higher-layer parameters may be set to values ​​that enable UE behavior). That is, if UE behavior that determines how to perform semi-static DL scheduling reception is enabled, then UE 110 may receive semi-static DL scheduling in the symbol set (i.e., perform semi-static DL scheduling reception) only when UE 110 receives both the first configuration of semi-static DL scheduling and DCI in the symbol set.

[0034] Furthermore, in the embodiments, the DCI can schedule downlink channels (e.g., PDSCH) or downlink signals (e.g., CSI-RS) from the symbol set used for semi-static DL scheduling. The downlink channels (e.g., PDSCH) and downlink signals (e.g., CSI-RS) are not semi-static DL scheduling. Additionally, the downlink channels (e.g., PDSCH) or downlink signals (e.g., CSI-RS) scheduled by the DCI can completely overlap in the time domain with the semi-static DL scheduling configuration corresponding to the semi-static DL scheduling. When UE 110 receives the DCI, UE 110 will know that semi-static DL scheduling exists. Therefore, when UE 110 receives the DCI, UE 110 can perform semi-static DL scheduling reception from the symbol set. When UE 110 does not receive the DCI, UE 110 will not receive the semi-static DL scheduling from the symbol set; that is, UE 110 will cancel the semi-static DL scheduling. The following uses... Figure 2 The following is an example to illustrate the implementation.

[0035] Figure 2 This is a schematic diagram illustrating the execution of semi-static DL scheduling in an embodiment of the present invention. Figure 2 In this embodiment, it is assumed that UE110 receives higher-layer parameters, i.e., enables UE behavior to determine how to perform semi-static DL scheduling for reception. For example... Figure 2 As shown, base station 120 can send a first configuration (or activation command or activation signaling) of the semi-static DL scheduling in the symbol set to UE 110. The semi-static DL scheduling in the first configuration (or activation command or activation signaling) can instruct UE 110 to receive the semi-static DL scheduling in the symbol set according to at least one cycle and indicate the timing of the semi-static DL scheduling in each cycle. When UE 110 receives DCI from base station 120, UE 110 can perform the semi-static DL scheduling reception in the symbol set. When UE 110 does not receive DCI from base station 120, UE 110 can choose not to receive the semi-static DL scheduling in the symbol set, i.e., UE 110 can cancel the semi-static DL scheduling reception. Furthermore, as... Figure 2As shown, DCI scheduling can completely overlap with downlink channels (e.g., DL-SCH) configured in each cycle of a semi-static DL scheduling configuration.

[0036] In an embodiment of the present invention, the RF signal processing device 112 can be configured to receive a semi-static DL scheduling configuration, higher-layer parameters, DCI, a second configuration, and a third configuration from the base station 120. In an embodiment of the present invention, when the RF signal processing device 112 receives the first configuration and higher-layer parameters of the semi-static DL scheduling from the base station 120 via RRC information, if the RF signal processing device 112 does not receive the DCI, the processor 113 can determine that it will not receive the semi-static DL scheduling in the symbol set according to the first configuration; that is, the UE 110 can cancel the semi-static DL scheduling reception. In another embodiment of the present invention, when the RF signal processing device 112 receives the first configuration and higher-layer parameters of the semi-static DL scheduling from the base station 120 via RRC information, but does not receive the second configuration and / or the third configuration from the base station via RRC information, if the RF signal processing device 112 does not receive the DCI, the processor 113 can determine that it will not receive the semi-static DL scheduling in the symbol set according to the first configuration; that is, the UE 110 can cancel the semi-static DL scheduling reception.

[0037] Figure 3 This is a flowchart 300 illustrating a communication method for semi-static DL scheduling according to an embodiment of the present invention. The communication method for semi-static DL scheduling can be applied to the UE 110 of the communication system 100. For example... Figure 3 As shown, in step S310, the RF signal processing device of UE110 receives RRC information from the base station 120 of communication system 100.

[0038] In step S320, when the RF signal processing device of UE 110 receives the first configuration and higher-layer parameters of semi-static DL scheduling from the base station 120 of the communication system 100 via RRC information, if the RF signal processing device of UE 110 does not receive DCI from the base station 120, the processor of UE 110 can determine that it will not receive the semi-static DL scheduling in the symbol set.

[0039] In the communication method, the RF signal processing device of UE 110 is further configured to receive a second configuration and / or a third configuration from RRC information. The second configuration provides an SFI index field in a specific DCI format. The third configuration provides a CO duration field in a specific DCI format. In the communication method, when the RF signal processing device of UE 110 receives the first configuration and higher-layer parameters of the semi-static DL scheduling from the RRC information, but does not receive the second configuration and / or the third configuration from the RRC information, if the RF signal processing device does not receive the DCI, the processor of UE 110 can determine that it will not receive the semi-static DL scheduling in the symbol set.

[0040] Figure 4 This is a flowchart 400 of a communication method for semi-static DL scheduling according to an embodiment of the present invention. The communication method for semi-static DL scheduling can be applied to the base station 120 of the communication system 100. For example... Figure 4 As shown, in step S410, base station 120 can send RRC information and DCI to inform UE 110 of the communication system 100 about the semi-static DL scheduling in the symbol set, wherein base station 120 can send the first configuration and higher layer parameters of the semi-static DL scheduling through RRC information.

[0041] In the communication method, base station 120 may further send to UE 110 a second configuration providing the SFI index field in a specific DCI format and / or a third configuration providing the CO duration field in a specific DCI format.

[0042] In the semi-static DL scheduling communication method provided by this invention, in unlicensed frequency bands, the UE will know the existence of semi-static DL scheduling based on DCI or a specific DCI. That is, in the semi-static DL scheduling communication method provided by this invention, the UE does not need to perform blind detection of the semi-static DL scheduling. This can reduce power consumption and avoid the decrease in measurement accuracy caused by blind detection.

[0043] The steps of the methods described in conjunction with the aspects disclosed herein can be directly implemented in hardware, in a software module executed by a processor, or a combination of both. The software module (e.g., including executable instructions and associated data) and other data can reside in data memory, such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of computer-readable storage medium known in the art. The sample storage medium can be coupled to a machine, such as a computer / processor (which may be referred to herein as a "processor" for convenience), such that the processor can read from and write information to the storage medium. The sample storage medium can be integrated into the processor. The processor and storage medium can reside in an ASIC. The ASIC can reside in a user equipment. Alternatively, the processor and storage medium can reside as discrete components in the user equipment. Furthermore, in some aspects, any suitable computer program product may include a computer-readable medium comprising code relating to one or more aspects of the invention. In some aspects, the computer program product may include packaging materials.

[0044] It should be noted that, although not explicitly stated, one or more steps of the methods described herein may include steps for storing, displaying, and / or outputting data as needed for a particular application. In other words, any data, records, fields, and / or intermediate results discussed in the methods may be stored, displayed, and / or output to another device as needed for a particular application. Although the foregoing describes embodiments of the invention, other and further embodiments of the invention can be devised without departing from the basic scope of the invention. Various embodiments or portions thereof presented herein may be combined to produce further embodiments. The above description represents the best contemplated mode for carrying out the invention. The description is for the purpose of illustrating the general principles of the invention and should not be construed as limiting. The scope of the invention is best determined by reference to the appended claims.

[0045] The preceding paragraphs describe many aspects. It is clear that the teachings of this invention can be implemented in various ways, and any particular configuration or function in the disclosed embodiments presents only representative conditions. Those skilled in the art will understand that all aspects of this invention can be applied independently or in combination.

Claims

1. A user equipment for semi-persistent downlink scheduling, comprising: a radio frequency signal processing device configured to receive radio resource control information from a base station; and a processor coupled to the radio frequency signal processing device, wherein, when the radio frequency signal processing device receives a first configuration and a higher layer parameter of a semi-persistent downlink scheduling from the radio resource control information, the processor determines not to receive the semi-persistent downlink scheduling in a set of symbols if the radio frequency signal processing device does not receive a downlink control information for the semi-persistent downlink scheduling from the base station.

2. The user equipment for semi-static downlink scheduling according to claim 1, c h a r a c t e r i z e d b y, the semi-persistent downlink scheduling comprises a periodic channel state information reference signal resource, a semi-persistent channel state information reference signal resource, or a semi-persistent scheduled physical downlink shared channel.

3. The user equipment for semi-static downlink scheduling of claim 1, wherein, the first configuration of the semi-persistent downlink scheduling informs the user equipment to receive the semi-persistent downlink scheduling in the set of symbols according to periodicity.

4. The user equipment for semi-static downlink scheduling of claim 1, wherein, the higher layer parameter indicates to enable a user equipment behavior to determine how to perform reception of the semi-persistent downlink scheduling.

5. The user equipment for semi-static downlink scheduling of claim 1, wherein, the downlink control information schedules a downlink channel or a downlink signal in the set of symbols.

6. The user equipment for semi-static downlink scheduling according to claim 5, c h a r a c t e r i z e d b y, the downlink channel or the downlink signal is not the semi-persistent downlink scheduling.

7. The user equipment for semi-static downlink scheduling of claim 1, wherein, when the radio frequency signal processing device receives the first configuration and the higher layer parameter of the semi-persistent downlink scheduling from the radio resource control information, and does not receive a second configuration and / or a third configuration from the radio resource control information, the processor determines not to receive the semi-persistent downlink scheduling in the set of symbols if the radio frequency signal processing device does not receive the downlink control information.

8. The user equipment for semi-static downlink scheduling according to claim 7, c h a r a c t e r i z e d b y, the second configuration provides a slot format indicator index field in a specific downlink control information format, and wherein the third configuration provides a channel occupancy duration field in the specific downlink control information format. 9.A communication method for semi-persistent downlink scheduling, the method is applied to a user equipment, comprising: receiving, by a radio frequency signal processing device of the user equipment, radio resource control information from a base station; and wherein, when the radio frequency signal processing device receives a first configuration and a higher layer parameter of a semi-persistent downlink scheduling from the radio resource control information, a processor of the user equipment determines not to receive the semi-persistent downlink scheduling in a set of symbols if the radio frequency signal processing device does not receive a downlink control information for the semi-persistent downlink scheduling from the base station.

10. The communication method for semi-static downlink scheduling according to claim 9, characterized in that, the semi-persistent downlink scheduling comprises a periodic channel state information reference signal resource, a semi-persistent channel state information reference signal resource, or a semi-persistent scheduled physical downlink shared channel.

11. The communication method for semi-static downlink scheduling according to claim 9, characterized in that, the first configuration of the semi-persistent downlink scheduling informs the user equipment to receive the semi-persistent downlink scheduling in the set of symbols according to periodicity.

12. The communication method for semi-static downlink scheduling according to claim 9, characterized in that, the higher layer parameter indicates to enable a user equipment behavior to determine how to perform reception of the semi-persistent downlink scheduling.

13. The communication method for semi-static downlink scheduling according to claim 9, wherein, the downlink control information schedules a downlink channel or a downlink signal in the set of symbols.

14. The communication method for semi-static downlink scheduling according to claim 13, characterized in that, the downlink channel or the downlink signal is not the semi-persistent downlink scheduling.

15. The communication method for semi-static downlink scheduling according to claim 9, wherein, the method further comprises: When the radio frequency signal processing device receives the first configuration of the semi-persistent downlink scheduling and the higher layer parameter from the radio resource control information, but does not receive a second configuration and / or a third configuration from the radio resource control information, the processor determines not to receive the semi-persistent downlink scheduling in the set of symbols if the radio frequency signal processing device does not receive the downlink control information.

16. The communication method for semi-static downlink scheduling according to claim 15, characterized in that, The second configuration provides a slot format indicator index field in a specific downlink control information format.

17. The communication method for semi-static downlink scheduling according to claim 15, characterized in that, The third configuration provides a channel occupancy duration field in a specific downlink control information format.

18. A communication method for semi-persistent downlink scheduling, the method is applied to a base station, comprising: The base station transmits radio resource control information and downlink control information for the semi-persistent downlink scheduling to inform a user equipment to receive the semi-persistent downlink scheduling in a set of symbols, wherein the base station transmits a first configuration of the semi-persistent downlink scheduling and a higher layer parameter through the radio resource control information.

19. The communication method for semi-static downlink scheduling according to claim 18, characterized in that, The semi-persistent downlink scheduling comprises a periodic channel state information reference signal resource, a semi-persistent channel state information reference signal resource, or a semi-persistent scheduled physical downlink shared channel.

20. The communication method for semi-static downlink scheduling according to claim 19, characterized in that, Further comprising: The base station transmits a second configuration providing a slot format indicator index field in a specific downlink control information format and / or a third configuration providing a channel occupancy duration field in the specific downlink control information format.

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