Method and apparatus for user equipment intended common beam switching

Abstract

A method for user equipment expected common beam switching includes the user equipment (UE) receiving a set of reference signals from a network controller; the UE sends a measurement report to the network controller based on a first reference signal in the received reference signals; the UE determines whether the number of first reference signals reported in the measurement report exceeds a threshold; and based on this, the UE monitors a physical downlink control channel (PDCCH) on a search space on a first control resource set (CORESET), and a spatial quasi-co-location (QCL) field in a transmission configuration indication (TCI) state of the first CORESET is set as a resource index of the first reference signal.

Description

[0001] This application is a divisional application. The application number of the original application is 202080104541.2, and the original application date is August 6, 2020. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present disclosure relates generally to methods and apparatus for digital communications and, in particular embodiments, to methods and apparatus for anticipated common beam switching of user equipment. Background Art

[0003] One possible deployment scenario for the fifth generation (5G) new radio (NR) system architecture uses high frequency (HF) (6 gigahertz (GHz) and above) operating frequencies to take advantage of larger available bandwidth and less interference than lower frequencies. Beamforming is often used to overcome the path loss issues associated with using high frequencies. Common deployment scenarios use common beams for downlink control channel and downlink data channel transmissions between user equipment (UE) and the mobile network. Typically, uplink control and data channel transmissions can utilize corresponding beams of a common downlink beam. The beam management procedure is used to update the transmission configuration state associated with uplink / downlink transmissions.

[0004] Therefore, there is a need for systems and methods for more efficient beam management for situations where a common beam is used for uplink and / or downlink data and control transmissions. Summary of the invention

[0005] The present disclosure provides a method and apparatus for public beam switching anticipated by a user equipment.

[0006] According to one aspect, a computer-implemented method for common beam switching anticipated by a user equipment is provided. The method includes: a user equipment (UE) receiving a set of reference signals from a network controller; the UE sending a measurement report to the network controller based on a first reference signal among the received reference signals; the UE determining whether the number of the first reference signals reported in the measurement report exceeds a threshold; and based on this, the UE monitoring a physical downlink control channel (PDCCH) on a search space on a first control resource set (CORESET), wherein a spatial quasi-colocation (QCL) field in a transmission configuration indication (TCI) state of the first CORESET is set to a resource index of the first reference signal.

[0007] Optionally, the method also includes: the UE detects a downlink control information (DCI) message in the PDCCH on the search space on the first CORESET, the DCI message indicating that the UE receives a physical downlink data channel (PDSCH), and the spatial QCL field in the TCI state of the PDSCH is set to the resource index of the first reference signal.

[0008] Optionally, the method further includes: in response to the UE failing to detect a DCI message within a plurality of time slots, the UE stopping monitoring the PDCCH on the search space on the first CORESET.

[0009] Optionally, the method also includes: the UE detects a TCI bit field in a DCI message in the PDCCH on the first CORESET, the TCI bit field indicating that the UE replaces the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET; and, in response to receiving the TCI bit field in the DCI message, the UE replaces the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET.

[0010] Optionally, the method also includes: the UE monitoring the PDCCH on the search space on the first CORESET, a demodulation reference signal (DMRS) of the PDCCH being quasi-co-located relative to a receive (RX) spatial parameter of the first reference signal.

[0011] Optionally, the method also includes: the UE detecting a DCI message in the PDCCH on the search space on the first CORESET, the DCI message indicating that the UE receives a PDSCH, and the DMRS of the PDSCH is quasi-co-located (QCL) relative to the RX space parameters of the first reference signal.

[0012] Optionally, the UE is initially configured with the first CORESET, and the spatial QCL field is not set, and the UE is not configured to monitor the PDCCH on the search space on the first CORESET.

[0013] Optionally, the UE is initially configured with the first CORESET, the spatial QCL field is set to a null (NULL) value, and the UE is not configured to monitor the PDCCH on the search space on the first CORESET.

[0014] Optionally, the threshold value associated with the threshold is predefined.

[0015] Optionally, the threshold is configured via a radio resource control (RRC) message.

[0016] Optionally, the threshold is updated via a medium access control-control element (MAC-CE) message.

[0017] Optionally, the UE is configured to monitor the PDCCH on the search space on the first CORESET, and the spatial QCL field in the TCI state of the first CORESET is set to the resource index of the first reference signal.

[0018] Optionally, the threshold is not configured, the UE is configured to monitor the PDCCH on the search space on the first CORESET, and a demodulation reference signal (DMRS) of the PDCCH is quasi-co-located with respect to spatial QCL information of the first reference signal.

[0019] Optionally, the plurality of time slots are predefined.

[0020] Optionally, the multiple time slots are configured via an RRC message.

[0021] Optionally, the multiple time slots are updated via a MAC-CE message.

[0022] Optionally, the threshold used for comparison with the number in the measurement report is reference signal receive power (RSRP).

[0023] Optionally, the threshold used for comparison with the number in the measurement report is a signal to interference plus noise ratio (SINR).

[0024] According to another aspect, a UE is provided. The UE includes: a non-transitory memory including instructions and one or more processors in communication with the memory. The one or more processors execute instructions to: receive a set of reference signals from a network controller; send a measurement report to the network controller based on a first reference signal among the received reference signals; determine whether the number of the first reference signals reported in the measurement report exceeds a threshold; and based on this, monitor a physical downlink control channel (PDCCH) on a search space on a first control resource set (CORESET), wherein a spatial quasi-co-location (QCL) field in a transmission configuration indication (TCI) state of the first CORESET is set to a resource index of the first reference signal.

[0025] Optionally, the one or more processors also execute the instructions to: detect a downlink control information (DCI) message in the PDCCH on the search space on the first CORESET, the DCI message indicating that the UE receives a physical downlink data channel (PDSCH), and the spatial QCL field in the TCI state of the PDSCH is set to the resource index of the first reference signal.

[0026] Optionally, the one or more processors further execute the instructions to: in response to the UE failing to detect a DCI message within a plurality of time slots, stop monitoring the PDCCH on the search space on the first CORESET.

[0027] Optionally, the one or more processors also execute the instructions to: detect a TCI bit field in the DCI message in the PDCCH on the first CORESET, the TCI bit field indicating the UE to replace the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET; and, in response to receiving the TCI bit field in the DCI message, replace the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET.

[0028] Optionally, the one or more processors further execute the instructions to: monitor the PDCCH on the search space on the first CORESET, a demodulation reference signal (DMRS) of the PDCCH being quasi-co-located relative to a receive (RX) spatial parameter of the first reference signal.

[0029] Optionally, the one or more processors also execute the instructions to: detect a DCI message in the PDCCH on the search space on the first CORESET, the DCI message indicating that the UE receives a PDSCH, and the DMRS of the PDSCH is quasi-co-located (QCL) relative to the RX spatial parameters of the first reference signal.

[0030] According to another aspect, a non-transitory computer-readable medium storing computer instructions is provided. When the computer instructions are executed by one or more processors, the one or more processors perform the following steps: receiving a set of reference signals from a network controller; sending a measurement report to the network controller based on a first reference signal among the received reference signals; determining whether the number of the first reference signals reported in the measurement report exceeds a threshold; and based on this, monitoring a physical downlink control channel (PDCCH) on a search space on a first control resource set (CORESET), wherein a spatial quasi-co-location (QCL) field in a transmission configuration indication (TCI) state of the first CORESET is set to a resource index of the first reference signal.

[0031] Optionally, the computer instructions cause the one or more processors to perform the following steps: detecting a downlink control information (DCI) message in the PDCCH on the search space on the first CORESET, the DCI message indicating that the UE receives a physical downlink data channel (PDSCH), and the spatial QCL field in the TCI state of the PDSCH is set to the resource index of the first reference signal.

[0032] Optionally, the computer instructions cause the one or more processors to perform the following steps: detecting a TCI bit field in a DCI message in the PDCCH on the first CORESET, the TCI bit field indicating that the UE replaces a spatial QCL field in the TCI state of the second CORESET with a spatial QCL field in the TCI state of the first CORESET; and, in response to receiving the TCI bit field in the DCI message, replacing the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET.

[0033] Practice of the above-described embodiments enables a communication device (e.g., UE) to anticipate switching of common beams for uplink and / or downlink data and control transmissions to facilitate more efficient downlink / uplink beam management (e.g., lower latency and / or overhead) to support higher intra-cell and layer 1 / layer 2 center-cell mobility and / or a greater number of configured TCI states.

[0034] Practice of the above-described embodiments provides an enhanced signaling mechanism for multi-beam operation to improve latency and efficiency by utilizing increased dynamic control signaling to signal beam switching rather than relying on the use of RRC signaling. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:

[0036] Figure 1 An example wireless communication system is shown;

[0037] Figure 2 A communication system is shown, highlighting an example channel structure between an access node and a UE;

[0038] Figure 3 A flow chart illustrating a first example operation occurring in a UE for UE-anticipated common beam switching according to example embodiments described herein;

[0039] Figure 4 A flow chart illustrating example operations occurring in a base station for common beam switching anticipated by a UE according to example embodiments described herein;

[0040] Figure 5 A flow chart illustrating a second example operation occurring in a UE for UE-anticipated common beam switching according to example embodiments described herein;

[0041] Figure 6 An example communication system according to example embodiments described herein is shown;

[0042] Figure 7 An example device is shown in which the methods and teachings according to the present disclosure may be implemented;

[0043] Figure 8 Another example device in which the methods and teachings according to the present disclosure may be implemented is shown;

[0044] Fig. 9 is a block diagram of a computer system that can be used to implement the apparatus and methods disclosed herein. DETAILED DESCRIPTION

[0045] The making and using of the disclosed embodiments are discussed in detail below. However, it should be understood that the present disclosure provides many applicable creative concepts that can be embodied in a variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the embodiments, and do not limit the scope of the present disclosure.

[0046] Existing beam management procedures lack effective support for common beam switching in certain deployment scenarios, such as high mobility scenarios, where a large number of transmission configuration states may be configured under certain circumstances. Examples of high-speed deployment scenarios include vehicles traveling on highways at speeds up to 80 miles per hour (mph) and high-speed trains at speeds up to 160 mph. In these scenarios, existing beam signaling procedures are too slow to signal common beam switching.

[0047] Figure 1A wireless communication system 100 is shown. The communication system 100 includes an access node 105 serving a user equipment (UE) 115. In a first mode of operation, communications with the UE 115 pass through the access node 105. In a second mode of operation, communications with the UE 115 do not pass through the access node 105, but the access node 105 typically allocates resources for the UE 115 to use for communications. Access nodes may also be generally referred to as Node B, evolved Node B (eNB), next generation (NG) Node B (gNB), master eNB (MeNB), secondary eNB (SeNB), master gNB (MgNB), secondary gNB (SgNB), network controller, control node, base station, access point, transmission point (TP), transmission-reception point (TRP), cell, carrier, macro cell, femto cell, pico cell, etc., and UE may also be generally referred to as mobile station, mobile phone, terminal, user, subscriber, site, etc. The access node may provide wireless access according to one or more wireless communication protocols, such as 3rd generation partnership project (3GPP) long term evolution (LTE), LTE advanced (LTE-A), 5G, 5G LTE, 5G NR, high speed packet access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. Although it will be appreciated that the communication system may employ multiple access nodes capable of communicating with multiple UEs, for simplicity, only one access node and one UE are shown.

[0048] As discussed above, the path loss of communication systems operating at high frequency (HF) (6 GHz and above, such as millimeter wavelength (mmWave)) is high, and beamforming can be used to overcome the high path loss. Figure 1 As shown, both access node 105 and UE 115 communicate using beamforming transmission and reception. For example, access node 105 communicates using multiple communication beams including beams 110 and 112, while UE 115 communicates using multiple communication beams including beams 120 and 122.

[0049] A beam can be a predefined set of beamforming weights in a codebook-based precoding context, or a dynamically defined set of beamforming weights in a non-codebook-based precoding context (e.g., eigenvalue-based beamforming (EBB)). A beam can also be a predefined set of phase-shifted preprocessor combined signals from an antenna array in the radio frequency (RF) domain. It should be understood that the UE can rely on codebook-based precoding to send uplink signals and receive downlink signals, while the TRP can rely on non-codebook-based precoding to form certain radiation patterns to send downlink signals and / or receive uplink signals.

[0050] Figure 2 2 shows a communication system 200, highlighting an example channel structure between an access node 205 and a UE 210. In a two-way communication implementation, there is a downlink channel 220 and an uplink channel 230 between the access node 205 and the UE 210. The downlink channel 220 and the uplink channel 230 may each include a plurality of unidirectional channels. Figure 2 As shown, the downlink channel 220 includes a physical downlink shared channel (PDSCH) 222, a first physical downlink control channel (PDCCH) 224, and a second physical downlink control channel (PDCCH-SWT) 226. The second physical downlink control channel (PDCCH-SWT) is also referred to as a switching PDCCH in this document. The uplink channel 230 includes a physical uplink control channel (PUCCH) 232 and a physical random access channel (PRACH) 234. Other channels may exist in the downlink channel 220 or the uplink channel 230, but Figure 2 Not shown in FIG.

[0051] In the existing beam indication framework, downlink control information (DCI) messages and medium access control-control element (MAC-CE) messages provide fast layer 1 (L1) and layer 2 (L2) signaling to handle intra-cell mobility, while radio resource control (RRC) messages provide slow high-layer signaling to handle inter-cell mobility. For example, for the downlink transmission configuration indicator (TCI) state, the RRC message provides relatively slow signaling and may take on the order of hundreds of milliseconds (ms). The MAC-CE message can be used to activate and update certain TCI states within approximately 10ms. Similarly, the RRC may take hundreds of milliseconds to configure the uplink spatial relationship, and the MAC-CE may activate and update the uplink spatial relationship within approximately 10ms.

[0052] Examples of existing beam signaling include:

[0053] PDCCH:

[0054] -RRC configuration up to 64 TCI states

[0055] -MAC-CE activates 1 TCI state for each CORESET

[0056] PDSCH:

[0057] -RRC configuration up to 128 TCI states

[0058] -MAC-CE activates up to 8 TCI states

[0059] -3 bits in DCI indicate one of 8 TCI states

[0060] CSI-RS:

[0061] -P-CSI-RS / TRS: RRC configuration resources and TCI status, RRC activation

[0062] -AP-CSI-RS: RRC configuration resources and TCI status, MAC-CE activation, DCI triggering

[0063] -AP-TRS: QCL with P-TRS, MAC-CE activation, DCI triggering

[0064] -SP-CSI-RS / CSI-IM: RRC configures resources, MAC-CE configures TCI status, MAC-CE activates

[0065] PUCCH:

[0066] -RRC configuration up to 8 spatial relationships

[0067] -MAC-CE activates a spatial relationship for PUCCH resources

[0068] - The 3-bit PUCCH resource indicator in the DCI indicates the PUCCH resource for sending UCI

[0069] PUSCH:

[0070] -SRS resource indication in DCI indicates the spatial relationship with SRS

[0071] SRS

[0072] -P-SRS: RRC configuration resources and spatial relationships, RRC activation

[0073] -SP-SRS: RRC configures resources and spatial relationships, MAC-CE activation

[0074] -AP-SRS: RRC configures resources and spatial relationships, and MAC-CE updates spatial relationships

[0075] As discussed previously, existing beam management procedures lack effective support for common beam switching in certain deployment scenarios (e.g., high mobility scenarios), where a large number of transmission configuration states may be configured while one or more UEs are in motion. Existing beam management is flawed due to the use of separate downlink / uplink beam indication frames, different control and data beam indications and updates, and slow RRC and MAC-CE signaling for configuration, activation, and updates. In common deployments, the beams used for PDCCH, PDSCH, tracking reference signal (TRS), and channel state information reference signal (CSI-RS) are the same beams. In some deployments, beam correspondence requirements are defined for uplink / downlink, where uplink control and data can utilize corresponding beams of a common downlink beam. However, existing beam management specifications lack efficient and simplified support for common beam implementations. For example, the existing beam switching time of PDCCH including beam measurement, MAC-CE signaling and periodic TRS delay may total 15ms, which may be too slow for high mobility support. The embodiments described herein provide more efficient beam management for the case where a common beam is used for uplink and / or downlink data and control transmission.

[0076] Reference again Figure 2In the illustrated embodiment, the first PDCCH 224 is configured for the UE 210 on the first control resource set (CORESET-1), and the second PDCCH 226 is configured for the UE 210 on the second CORESET (CORESET-SWT). Figure 2 An embodiment is shown in which the UE 210 is configured with a first PDCCH 224 and a second PDCCH 226, each having a corresponding CORESET, but it should be understood that the UE 210 can be configured with any number of PDCCHs. For example, the UE 210 can be configured with PDCCH-1 on CORESET 1, PDCCH-2 on CORESET-2, ..., PDCCH-K on CORESET K, and an additional second PDCCH 226 on CORESET-SWT. In a specific embodiment, the second CORESET (CORESET-SWT) is configured to be time-division multiplexed (TDM) with other CORESETs without time domain overlap. In another specific embodiment, the second CORESET (CORESET-SWT) is configured to overlap with the first CORESET. In the initial state, the spatial quasi co-location (QCL) in the TCI state of the second PDCCH 226 is not initialized and is then dynamically updated based on the UE beam measurement report further described herein. Spatial quasi co-location (QCL'd) means that the access node sends different signals through similar beams.

[0077] exist Figure 2In an embodiment, the UE 210 performs beam measurement on a set of downlink reference signals from the access node 205 and calculates a set of beam measurement quantities. The UE 210 sends a measurement report to the access node 205, which consists of a configurable number with a maximum value and a reference signal resource indication corresponding to these reported numbers, and starts monitoring the second PDCCH 226 if the best number in the measurement report exceeds a threshold. In a specific embodiment, the network may send a set configuration (SET-SWT) along with the configuration of the beam measurement report. The information in the set configuration indicates to the UE 210 to include or exclude certain reference signals used to determine the best number of beam measurements. An example of a set configuration may be a bit mask, each bit of the bit mask corresponding to the inclusion or exclusion of a reference signal used to determine the best number of beam measurements. In an embodiment of monitoring the second PDCCH, the UE 210 assumes that the spatial QCL field of the TCI state of the second CORESET is set to the reference signal resource indication corresponding to the best number in the beam measurement report. In an embodiment monitoring the second PDCCH, the UE 210 assumes that a demodulation reference signal (DMRS) of the second PDCCH is QCL with respect to a receive (RX) spatial parameter corresponding to the best number of reference signals in the beam measurement report. In an embodiment monitoring the second PDCCH, if the UE 210 detects a specific TCI bit field within the DCI message of the second PDCCH (PDCCH-SWT) 226, the UE 210 replaces the spatial QCL field in the TCI state of the first CORESET with a reference signal resource indication corresponding to the best number in the beam measurement report.

[0078] exist Figure 2In an embodiment of the present invention, the UE 210 derives a metric based on the number of reference signal measurements. In an embodiment of deriving the metric, the UE 210 derives the metric by calculating a ratio of the number of beam measurements. The network sends a set configuration (SET-SWT) along with the configuration of the beam measurement report. The information in the set configuration indicates to the UE 210 the number of beam measurements used when deriving the metric. An example of a set configuration may be a bit mask, where each bit corresponds to whether a particular number of beam measurements of a reference signal should be included in the set used to derive the numerator of the ratio. The remaining number of beam measurements that are not in the set should be used to derive the denominator of the ratio. The UE 210 then selects the number of beam measurements with the maximum value in the set and divides it by the number of beam measurements that are not in the set with the minimum value to obtain a ratio as the metric. If the metric exceeds a threshold, the UE 210 starts monitoring the second PDCCH 226. In an embodiment of monitoring the second PDCCH, the UE assumes that the spatial QCL field of the TCI state of the second CORESET is set to a reference signal resource indication corresponding to the number of reference signal beam measurements on which the metric is derived. In an embodiment monitoring the second PDCCH, the UE 210 assumes that the DMRS of the second PDCCH is QCL with respect to the RX spatial parameters of the reference signal based on the number of beam measurements for which the metric is derived. In an embodiment monitoring the second PDCCH, if the UE 210 detects a specific TCI bit field within the DCI message of the second PDCCH (PDCCH-SWT) 226, the UE 210 replaces the spatial QCL field in the TCI state of the first CORESET with a reference signal resource indication corresponding to the number of reference signal beam measurements based on which the metric is derived.

[0079] exist Figure 2 In an embodiment, the UE 210 monitors the second PDCCH 226 during one or more configurable switching monitoring time slots (SLOT-SWT). The configuration of the SLOT-SWT may be predefined or signaled to the UE 210 via an RRC message. Figure 2 In an embodiment, the threshold for comparison with the best beam measurement quantity or metric is predefined or signaled to UE 210 via an RRC message. The threshold may be dynamically updated to UE 210 from the network via a MAC-CE message. Figure 2 In an embodiment, the bit mask in the set configuration is predefined or signaled to the UE via an RRC message. The bit mask may be dynamically updated to the UE from the network via a MAC-CE message. Figure 2 In an embodiment of the beam measurement report, the quantity reported is layer 1 (Layer 1, L1) reference signal received power (RSRP) or L1 signal to interference plus noise ratio (SINR).

[0080] exist Figure 2 In an example operation of the communication system 200, the network has configured multiple PDCCHs for UE 210, including PDCCH-1 on CORESET-1, PDCCH-2 on CORESET-2, ..., PDCCH-K on CORESET-K. The network also configures a switching PDCCH-SWT on CORESET-SWT, and does not configure the spatial QCL field in the TCI state. The network also configures L1-RSRP or L1-SINR measurement reports. The network configures one or more switching monitoring time slots (SLOT-SWT). In a specific embodiment, the switching monitoring time slot is defined as a downlink time slot X that occurs after UE 210 sends its L1-RSRP / L1-SINR measurement report in the uplink.

[0081] Based on the measurements, the UE 210 determines a beam measurement metric (M-SWT) as a measure of the relative beam quality between the best beam with the highest number of beam measurements belonging to the SET-SWT and the worst beam with the lowest number not belonging to the SET-SWT. If the metric (M-SWT) exceeds the switching threshold (T-SWT), during the SLOT-SWT, the UE 210 attempts to detect UE-specific DCI in the PDCCH-SWT on the CORESET-SWT. The spatial QCL field of the TCI-SWT state of the PDCCH-SWT is set to a downlink reference signal indication corresponding to the number of beam measurements on which the numerator of the M-SWT is based. In one or more embodiments, the resource indication can be a CSI-RS resource indicator (CSI-RS resource indicator, CRI) or an SSB resource indicator (SSBRI). In a specific embodiment, the switching threshold (T-SWT) is predefined. In another specific embodiment, the switching threshold (T-SWT) is configured by RRC sent from the access node 105 to the UE 210.

[0082] If UE-specific DCI is detected in the PDCCH-SWT on the CORESET-SWT during the SLOT-SWT, the UE 210 may perform different actions depending on the bit value found in the TCI-SWT field. If the bit in the TCI-SWT is set to a value equal to zero (0), the UE 210 continues to receive the PDCCH-SWT on the CORESET-SWT and its scheduled PDSCH and downlink reference signals before the next beam measurement report is sent on the uplink. If the bit in the TCI-SWT field is set to a value J, the UE 210 updates the spatial QCL field of the TCI state of the PDCCH-J on CORESET-J with the spatial QCL field of the TCI-SWT state of the PDCCH-SWT on the CORESET-SWT. The UE 210 may also be configured to not monitor the PDCCH-SWT on the CORESET-SWT for the remaining downlink time slots before the UE 210 sends the next beam measurement report on the uplink.

[0083] If no UE-specific DCI is detected in the PDCCH-SWT on the CORESET-SWT during the SLOT-SWT, the UE 210 is configured not to monitor the PDCCH-SWT on the CORESET-SWT for the remaining downlink time slots before the UE 210 sends the next beam measurement report on the uplink. In one or more embodiments, the UE's expected common beam switching capability described herein may be dynamically activated and deactivated by the network through MAC-CE signaling or other signaling procedures. In one or more embodiments, the UE 210 may signal to the network through the UE feature capability bit that the UE 210 supports the UE's expected common beam switching capability.

[0084] Figure 3A flow chart of a first example operation 300 for UE-intended common beam switching occurring in a UE according to an exemplary embodiment described herein is shown. Operation 300 may indicate operations occurring in a UE (e.g., a physical layer entity of the UE) when the UE makes beam measurements and responds accordingly. The UE is configured by a base station (e.g., a gNB) with a first PDCCH on a first CORESET and a switching PDCCH (PDCCH-SWT) on a switching CORESET (CORESET-SWT) (block 305). The base station configures the PDCCH-SWT on the CORESET-SWT without configuring the spatial QCL field in the TCI state to the PDCCH-SWT. Initially, the UE is not assumed to monitor the PDCCH-SWT until the base station sends a UE-intended common beam switching feature activation signal via RRC or MAC-CE and the UE starts sending beam measurement reports in the uplink. In one or more embodiments, the base station may deactivate the UE-intended common beam switching feature explicitly via RRC or MAC-CE signaling or implicitly by stopping the UE from sending beam measurement reports in the uplink.

[0085] The UE monitors the first PDCCH on the first CORESET, performs beam measurement on one or more downlink reference signals, and sends a beam measurement report of the reference signal to the base station (box 307). The UE then determines whether it is within the switching monitoring time slot (SLOT-SWT) (box 309). If the UE determines that it is not within the SLOT-SWT, the UE continues to monitor the PDCCH within the first CORESET (box 307) until the next beam measurement report is sent. If the UE determines that it is within the SLOT-SWT, the UE calculates a beam switching metric (M-SWT) based on the number of reference signal beam measurements and compares the M-SWT with the switching threshold (T-SWT) (box 311).

[0086] In one or more embodiments, the base station configures the calculation of the M-SWT used by the UE based on the number of beam measurements through RRC signaling. In one embodiment, the base station configures a bit for each resource to indicate how the resource should be used in the calculation of the M-SWT. For example, if the bit of the reference signal resource is set to value = 1, the number of beam measurements associated with the reference signal resource is used to derive the denominator of the M-SWT. If the bit of the reference signal resource is set to value = 0, the number of beam measurements associated with the reference signal resource is used to derive the numerator of the M-SWT.

[0087] In one embodiment, the UE may receive a MAC-CE signal from the base station during connected mode to dynamically reconfigure the use of L1 beam measurement results of the reference signal corresponding to each reference signal resource configured by RRC signaling. In one embodiment, the content of the MAC-CE may contain a bit mask, wherein each bit of the bit mask is associated with a reference signal resource. For example, if the bit of a resource within the bit mask is set to a value = 1, the measurement result associated with the resource is used to derive the denominator of the M-SWT. If the bit of a resource within the bit mask is set to a value = 0, the measurement result associated with the resource is used to derive the numerator of the M-SWT.

[0088] In an example of deriving M-SWT, the UE determines a quantity V1, which is the maximum value of all measurement quantities belonging to resources within the same bit setting (e.g., bit 0). The UE then determines a quantity V2, which is the minimum value of all measurement quantities belonging to resources with another same bit setting (e.g., bit 1). In the example, the M-SWT is calculated as V1 / V2 or log(V1 / V2), calculated in decibel (dB) scale. The calculated M-SWT is compared with a switching threshold (T-SWT), which can be predefined or configured through RRC signaling, as described earlier in this document.

[0089] In the example where all reference resources are configured to belong to the denominator, the UE can set V2=1, or only compare V1 with the T-SWT. For example, assume that the reported quantity is L1-RSRP and all resources are configured with bit 0. In this case, V1 represents the best beam with the largest L1-RSRP quantity and is compared with the T-SWT.

[0090] If the M-SWT is not greater than the T-SWT, the UE returns to box 309 to continue to determine whether it is within the SLOT-SWT. If the M-SWT is greater than the T-SWT, the beam appears to be significantly stronger than the current beam used for control and data transmission, and the UE expects the base station to make a decision to switch the current beam to the new beam. The UE begins monitoring the PDCCH-SWT on the CORESET-SWT, assuming that the spatial QCL field in the TCI state will be set to a reference signal resource indication, and derives the M-SWT numerator based on the beam measurement quantity indicated by the reference signal resource (box 313). During the SLOT-SWT, the UE continues to monitor the first PDCCH on the first CORESET and the PDCCH-SWT on the CORESET-SWT, while also continuing to monitor other configured PDCHHs on other CORESETs (box 315).

[0091] The UE attempts to detect UE-specific DCI in the PDCCH-SWT on the CORESET-SWT (box 317). If the UE cannot detect the UE-specific DCI, the UE determines whether it is still in the SLOT-SWT (box 319). If the UE is still in the SLOT-SWT, the UE returns to box 315 to continue monitoring the PDCCH on the CORESET and the PDCCH-SWT on the CORESET-SWT (box 315). If the UE cannot detect the UE-specific DCI and is no longer in the SLOT-SWT, the UE assumes that the base station will not switch the transmit beam and stops monitoring the PDCCH-SWT on the CORESET-SWT until the next beam measurement report is sent in the uplink (box 321), and returns to box 307 to start monitoring the first PDCCH on the first CORESET again.

[0092] If the UE detects UE-specific DCI in the PDCCH-SWT, the UE determines whether the TCI bit field is set to all zeros (box 323). If the TCI bit field is set to all zeros, the UE assumes that the base station will use the PDCCH-SWT on the CORESET-SWT to send control channels and data channels, where the spatial QCL field in the TCI state is set to the reference signal resource indication, the M-SWT numerator is derived based on the beam measurement number of the reference signal resource indication, and it is assumed that the base station will not replace any currently configured PDCCH TCI state. The UE continues to monitor the first PDCCH on the first CORESET and the PDCCH-SWT on the CORESET-SWT until the next beam measurement report is sent in the uplink (box 329). In this way, the transmission of control and data channels can more dynamically utilize the strong beam state. The UE determines whether the next uplink measurement report time has arrived (box 331). If the next uplink measurement reporting time has not yet arrived, the UE returns to block 329 to continue monitoring the first PDCCH on the first CORESET and the PDCCH-SWT on the CORESET-SWT. If the next uplink measurement reporting time has arrived, the UE stops monitoring the PDCCH-SWT on the CORESET-SWT (block 333) and returns to block 307 to start monitoring the first PDCCH on the first CORESET again.

[0093] If the UE detects in the PDCCH-SWT that the TCI bit field in the UE-specific DCI is set to a non-zero value (TCI=j), the UE determines that the base station instructs the UE to replace the spatial QCL field in the TCI state of CORESET-J with the spatial field in the TCI state of CORESET-SWT. The UE replaces the spatial QCL field in the TCI state of CORESET-J with the spatial QCL field in the TCI state of CORESET-SWT, and sets the CORESET-SWT spatial QCL field in the TCI state to None (or NULL) (box 325). The UE stops monitoring the PDCCH-SWT on the CORESET-SWT (box 327) and returns to box 307 to start monitoring the first PDCCH on the first CORESET again.

[0094] Figure 4 A flow diagram of example operations 400 occurring in a base station for common beam switching anticipated by a UE in accordance with example embodiments described herein is shown. Operations 400 may be indicative of operations occurring in a base station (e.g., a physical layer entity of the base station) when the base station receives a beam measurement report from a UE and responds accordingly. The base station configures a first PDCCH on a first CORESET and a switching PDCCH on a switching CORESET (CORESET-SWT) (PDCCH-SWT) for the UE. The base station configures the PDCCH-SWT on the CORESET-SWT without setting the spatial QCL field in the TCI state of the CORESET-SWT. The base station sends a first PDCCH to the UE on the first CORESET (block 405).

[0095] The base station determines whether a new uplink measurement report has been received from the UE (block 407). If no new measurement report has been received from the UE, the base station returns to block 405. If the base station determines that a new uplink measurement report has been received from the UE, the base station deletes the PDCCH-SWT on the CORESET-SWT from the PDCCH set including the first PDCCH on the first CORESET (block 409). In one embodiment, the uplink measurement report includes an indication of whether a metric based on the number of reference signal beam measurements of the UE (M-SWT) is greater than a switching threshold (T-SWT).

[0096] The base station determines whether the M-SWT is greater than the T-SWT based on the indication received in the uplink measurement report (box 411). If the M-SWT is greater than the T-SWT, the base station determines whether to switch the PDCCH-SWT on the CORESET-SWT to the PDCCH-J on the CORESET-J, where the PDCCH-J is the current PDCCH determined to be a potential candidate for replacement by the PDCCH-SWT (box 413). If the base station determines to switch the PDCCH-SWT on the CORESET-SWT to the PDCCH-J on the CORESET-J, the base station sends the PDCCH-SWT to the UE on the CORESET-SWT, and the TCI state (TCI bit = j) is set to the TCI state of (PDCCH-J) (box 415). The base station determines whether an uplink acknowledgment (ACK) or a negative acknowledgment (NACK) has been received from the UE (box 417).

[0097] If an uplink ACK or NACK has not been received from the UE, the base station determines whether the UE is within the switch monitoring time slot (SLOT-SWT) (block 419). If the base station determines that the UE is within the SLOT-SWT, the base station returns to block 415. If the base station determines that the UE is not within the SLOT-SWT, the base station returns to block 405. If an uplink ACK or NACK has been received from the UE, the base station switches the PDCCH-SWT on the CORESET-SWT to the PDCCH-J on the CORESET-J (block 421) and returns to block 405.

[0098] If the base station decides not to switch the PDCCH-SWT on CORESET-SWT to PDCCH-J on CORESET-J, the base station sends the PDCCH-SWT on CORESET-SWT with the TCI bit set to zero (block 423). The base station determines whether an uplink ACK or NACK has been received from the UE (block 425).

[0099] If an uplink ACK or NACK has not been received from the UE, the base station determines whether the UE is within the SLOT-SWT (block 427). If the base station determines that the UE is within the SLOT-SWT, the base station returns to block 423. If the base station determines that the UE is not within the SLOT-SWT, the base station returns to block 405. If the base station determines that an uplink ACK or NACK has been received, the base station adds the PDCCH-SWT on the CORESET-SWT to the set including the first PDCCH on the first CORESET and returns to block 405.

[0100] Figure 5A flow diagram is shown of a second example operation 500 occurring in a UE for UE anticipated common beam switching according to example embodiments described herein. Operations 500 may be indicative of operations occurring in a UE (eg, a physical layer entity of the UE) as the UE makes beam measurements and responds accordingly.

[0101] The UE receives a set of reference signals from a network controller (e.g., a network controller associated with a base station) (block 505). The UE sends a measurement report to the network controller based on a first reference signal among the received reference signals (block 507). The UE determines whether the number of first reference signals reported in the measurement report exceeds a threshold (block 509). In one embodiment, the threshold used for comparison with the number in the measurement report is a reference signal received power (RSRP). In another embodiment, the threshold used for comparison with the number in the measurement report is a signal to interference plus noise ratio (SINR).

[0102] Based on the number of first reference signals exceeding a threshold, the UE monitors a physical downlink control channel (PDCCH) on a search space on a first control resource set (CORESET) (block 511). A spatial quasi co-location (QCL) field in a transmission configuration indication (TCI) state of the first CORESET is set to a resource index of the first reference signal.

[0103] For beam management, the network configures a set of reference signals for transmission. The configuration is performed by configuring a set of reference signal resources (e.g., time and frequency locations). Each resource can be indexed by a resource index. The UE performs measurements and reports the resource index of the best reference signal beam. When the network instructs the UE to receive a specific signal with a specific receive direction (beam), the network indicates the resource index in the TCI state to the UE. The UE will apply the same receive filter to receive the reference signal corresponding to the indicated resource index.

[0104] The UE detects a downlink control information (DCI) message in the PDCCH in the search space on the first CORESET (block 513). In one embodiment, the DCI message indicates that the UE receives a physical downlink data channel (PDSCH). The spatial QCL field in the TCI state of the PDSCH is set to a resource index of the first reference signal. In one embodiment, in response to the UE failing to detect the DCI message in a plurality of time slots, the UE stops monitoring the PDCCH on the search space on the first CORESET. In one embodiment, the plurality of time slots are predefined. In another embodiment, the plurality of time slots are configured via an RRC message. In another embodiment, the plurality of time slots are updated via a MAC-CE message.

[0105] In another embodiment, the UE detects the TCI bit field in the DCI message in the PDCCH on the first CORESET. The TCI bit field indicates that the UE replaces the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET. Then, in response to receiving the TCI bit field in the DCI message, the UE replaces the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field in the TCI state of the first CORESET.

[0106] In another embodiment, the UE monitors a PDCCH on a search space on a first CORESET, a demodulation reference signal (DMRS) of the PDCCH being quasi co-located with respect to a receive (RX) spatial parameter of the first reference signal. In another embodiment, a DCI message detected by the UE in a PDCCH on a search space on the first CORESET indicates that the UE receives a PDSCH, wherein the DMRS of the PDSCH is quasi co-located (QCL) with respect to an RX spatial parameter of the first reference signal.

[0107] In one embodiment, the UE is initially configured with a first CORESET, and the spatial QCL field is not set, and the UE is not configured to monitor the PDCCH on the search space on the first CORESET. In another embodiment, the UE is initially configured with a first CORESET, the spatial QCL field is set to a null value, and the UE is not configured to monitor the PDCCH on the search space on the first CORESET.

[0108] In one embodiment, the threshold value of the threshold is predefined. In another embodiment, the threshold is configured via a radio resource control (RRC) message. In another embodiment, the threshold is updated via a medium access control-control element (MAC-CE) message.

[0109] In one embodiment, the UE is configured to monitor the PDCCH on the search space on the first CORESET, and the spatial QCL field in the TCI state of the first CORESET is set to the resource index of the first reference signal. In one embodiment, the threshold is not configured, the UE is configured to monitor the PDCCH on the search space on the first CORESET, and the DMRS of the PDCCH is quasi co-located with respect to the spatial QCL information of the first reference signal.

[0110] Figure 6An example communication system 600 is shown. In general, the system 600 enables multiple wireless or wired users to send and receive data and other content. The system 600 can implement one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single-carrier FDMA (SC-FDMA), or non-orthogonal multiple access (NOMA).

[0111] In this example, the communication system 600 includes electronic devices (ED) 610a-610c, radio access networks (RAN) 620a-620b, a core network 630, a public switched telephone network (PSTN) 640, the Internet 650, and other networks 660. Figure 6 A certain number of these components or elements are shown, but any number of these components or elements may be included in system 600 .

[0112] EDs 610a-610c are configured to operate or communicate in system 600. For example, EDs 610a-610c are configured to transmit or receive via a wireless or wired communication channel. Each ED 610a-610c represents any suitable end-user device and may include (or may be referred to as): user equipment (UE), wireless transmit or receive unit (WTRU), mobile station, fixed or mobile subscriber unit, cellular phone, personal digital assistant (PDA), smart phone, laptop, computer, touch pad, wireless sensor, or consumer electronic device.

[0113] Here, the RAN 620a-620b includes base stations 670a-670b, respectively. Each base station 670a-670b is configured to wirelessly connect to one or more of the EDs 610a-610c so as to access the core network 630, the PSTN 640, the Internet 650 or other networks 660. For example, the base stations 670a-670b may include (or be) one or more of several well-known devices, such as a base transceiver station (BTS), a Node-B (NodeB), an evolved NodeB (eNodeB), a next generation (NG) NodeB (gNB), a Home NodeB, a Home eNodeB, a site controller, an access point (AP) or a wireless router. The EDs 610a-610c are configured to connect and communicate with the Internet 650, and may access the core network 630, the PSTN 640 or other networks 660.

[0114] exist Figure 6 In the illustrated embodiment, base station 670a forms part of RAN 620a, which may include other base stations, elements or devices. In addition, base station 670b forms part of RAN 620b, which may include other base stations, elements or devices. Each base station 670a-670b operates to send or receive wireless signals within a specific geographic area (sometimes referred to as a "cell"). In some embodiments, multiple-input multiple-output (MIMO) technology may be used, with multiple transceivers in each cell.

[0115] Base stations 670a-670b communicate with one or more of EDs 610a-610c using wireless communication links over one or more air interfaces 690. Air interfaces 690 may employ any suitable wireless access technology.

[0116] It is contemplated that the system 600 may use multi-channel access functionality, including the schemes described above. In certain embodiments, the base station and ED implement 5G new radio (NR), LTE, LTE-A, or LTE-B. Of course, other multiple access schemes and wireless protocols may be used.

[0117] RAN 620a-620b communicates with core network 630 to provide voice, data, applications, voice over internet protocol (VoIP) or other services to ED 610a-610c. It is understood that RAN 620a-620b or core network 630 can communicate directly or indirectly with one or more other RANs (not shown). Core network 630 can also be used as a gateway access for other networks (e.g., PSTN 640, Internet 650, and other networks 660). In addition, some or all of EDs in ED610a-610c may include the ability to communicate with different wireless networks through different wireless links using different wireless technologies or protocols. Instead of wireless communication (or in addition to wireless communication), ED can communicate with a service provider or switch (not shown) and with Internet 650 through a wired communication channel.

[0118] although Figure 6 An example of a communication system is shown, but Figure 6 For example, communication system 600 may include any number of EDs, base stations, networks, or other components in any suitable configuration.

[0119] Figure 7 and Figure 8 An example device is shown in which the methods and teachings according to the present disclosure can be implemented. Specifically, Figure 7 An example ED 710 is shown, Figure 8 An example base station 770 is shown. These components may be used in system 600 or any other suitable system.

[0120] like Figure 7 As shown, ED 710 includes at least one processing unit 700. Processing unit 700 implements various processing operations of ED 710. For example, processing unit 700 can perform signal encoding, data processing, power control, input / output processing, or any other function that enables ED 710 to operate in system 700. Processing unit 700 also supports the methods and teachings described in detail above. Each processing unit 700 includes any suitable processing or computing device configured to perform one or more operations. Each processing unit 700 may include, for example, a microprocessor, a microcontroller, a digital signal processor, a field programmable gate array, or an application-specific integrated circuit.

[0121] ED 710 also includes at least one transceiver 702. Transceiver 702 is configured to modulate data or other content for transmission through at least one antenna or network interface controller (NIC) 704. Transceiver 702 is also configured to demodulate data or other content received by at least one antenna 704. Each transceiver 702 includes any suitable structure for generating a signal for wireless or wired transmission or for processing a signal received wirelessly or by wire. Each antenna 704 includes any suitable structure for sending or receiving a wireless signal or a wired signal. One or more transceivers 702 can be used for ED 710, and one or more antennas 704 can be used for ED 710. Although transceiver 702 is shown as a single functional unit, it can also be implemented using at least one transmitter and at least one separate receiver.

[0122] ED 710 also includes one or more input / output devices 706 or interfaces (e.g., a wired interface to the Internet 650). Input / output devices 706 facilitate interaction with users or other devices in a network (network communications). Each input / output device 706 includes any suitable structure for providing information to or receiving information from a user, such as a speaker, microphone, keypad, keyboard, display, or touch screen, including network interface communications.

[0123] In addition, the ED 710 includes at least one memory 708. The memory 708 stores instructions and data used, generated, or collected by the ED 710. For example, the memory 708 can store software or firmware instructions executed by one or more processing units 700, as well as data for reducing or eliminating interference in incoming signals. Each memory 708 includes any suitable volatile or non-volatile storage and retrieval device. Any suitable type of memory can be used, such as a random access memory (RAM), a read only memory (ROM), a hard disk, an optical disk, a subscriber identity module (SIM) card, a memory stick, a secure digital (SD) memory card, etc.

[0124] like Figure 8As shown, the base station 770 includes at least one processing unit 750, at least one transceiver 752 (including the functions of a transmitter and a receiver), one or more antennas 756, at least one memory 758, and one or more input / output devices or interfaces 766. A scheduler understood by those skilled in the art is coupled to the processing unit 750. The scheduler may be included in the base station 770 or operate independently of the base station 770. The processing unit 750 implements various processing operations of the base station 770, such as signal encoding, data processing, power control, input / output processing, or any other function. The processing unit 750 may also support the methods and teachings detailed above. Each processing unit 750 includes any suitable processing or computing device configured to perform one or more operations. Each processing unit 750 may include, for example, a microprocessor, a microcontroller, a digital signal processor, a field programmable gate array, or an application-specific integrated circuit.

[0125] Each transceiver 752 includes any suitable structure for generating a signal for wireless or wired transmission to one or more EDs or other devices. Each transceiver 752 also includes any suitable structure for processing a signal received wirelessly or by wire from one or more EDs or other devices. Although the transmitter and receiver are shown as a combination of transceivers 752, they can be separate components. Each antenna 756 includes any suitable structure for sending or receiving wireless signals or wired signals. Although the shared antenna 756 is shown here as coupled to the transceiver 752, one or more antennas 756 can be coupled to one or more transceivers 752, thereby allowing a separate antenna 756 to be coupled to the transmitter and receiver (if the transmitter and receiver are equipped as separate components). Each memory 758 includes any suitable volatile or non-volatile storage and retrieval device. Each input / output device 766 helps to interact with users or other devices in the network (network communication). Each input / output device 766 includes any suitable structure for providing information to a user or receiving information from a user, including network interface communication.

[0126] Fig. 9900 is a block diagram of a computing system 900 that can be used to implement the devices and methods disclosed herein. For example, the computing system can be any entity of a UE, an access network (AN), a mobility management (MM), a session management (SM), a user plane gateway (UPGW), or an access stratum (AS). A particular device may use all of the components shown or only a subset of the components, and the degree of integration between devices may vary. In addition, a device may include multiple instances of a component, such as multiple processing units, processors, memories, transmitters, receivers, etc. The computing system 900 includes a processing unit 902. The processing unit includes a central processing unit (CPU) 914, a memory 908, and may also include a mass storage device 904 connected to a bus 920, a video adapter 910, and an I / O interface 912.

[0127] Bus 920 can be one or more of several bus architectures of any type, including a storage bus or storage controller, a peripheral bus, or a video bus. CPU 914 can include any type of electronic data processor. Memory 908 can include any type of non-transient system memory, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), read-only memory (ROM) or a combination thereof. In one embodiment, memory 908 can include a ROM for use at startup and a DRAM for storing programs and data, which is used when executing a program.

[0128] The mass storage 904 may include any type of non-transitory storage device configured to store data, programs, and other information and make the data, programs, and other information accessible via the bus 920. The mass storage 904 may include, for example, one or more of a solid-state drive, a hard disk drive, a magnetic disk drive, or an optical disk drive.

[0129] Video adapter 910 and I / O interface 912 provide interfaces for coupling external input and output devices to processing unit 902. As shown, examples of input and output devices include a display 918 coupled to video adapter 910 and a mouse, keyboard, or printer 916 coupled to I / O interface 912. Other devices may be coupled to processing unit 902, and additional or fewer interface cards may be used. For example, a serial interface such as a universal serial bus (USB) (not shown) may be used to provide an interface for external devices.

[0130] The processing unit 902 also includes one or more network interfaces 906, which may include wired links such as Ethernet cables to access nodes or different networks, or wireless links. The network interface 906 allows the processing unit 902 to communicate with remote units over a network. For example, the network interface 906 may provide wireless communication via one or more transmitters / transmit antennas and one or more receivers / receive antennas. In one embodiment, the processing unit 902 is coupled to a local area network 922 or a wide area network for data processing and communication with remote devices (e.g., other processing units, the Internet, or remote storage facilities).

[0131] It should be understood that one or more steps of the embodiment method provided herein can be performed by corresponding units or modules. For example, a signal can be sent by a sending unit or a sending module. A signal can be received by a receiving unit or a receiving module. A signal can be processed by a processing unit or a processing module. A signal can be monitored by a monitoring unit or a monitoring module. A signal can be detected by a detection unit or a detection module. The corresponding unit or module can be hardware, software or a combination thereof. For example, one or more of these units or modules can be an integrated circuit, such as a field programmable gate array (FPGA) or an application-specific integrated circuit (ASIC).

[0132] Although the present disclosure and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the disclosure as defined by the appended claims.

Claims

1. A communication method, executed by a user equipment UE, or executed by a processor for a UE, characterized in that: include: receiving a set of reference signals from a network controller; Sending a measurement report to the network controller based on a first reference signal among the received reference signals; determining whether the number of the first reference signals reported in the measurement report exceeds a threshold; When the number of the first reference signals exceeds the threshold, a physical downlink control channel PDCCH on a search space on a first control resource set CORESET is monitored, and a transmission configuration of the first CORESET indicates that a spatial quasi-co-location QCL field in a TCI state is set to a resource index of the first reference signal.

2. The method according to claim 1, characterized in that Also includes: A downlink control information DCI message is detected in the PDCCH on the search space on the first CORESET, where the DCI message indicates that the UE receives a physical downlink data channel PDSCH, and a spatial QCL field in a TCI state of the PDSCH is set to a resource index of the first reference signal.

3. The method according to claim 1, characterized in that In response to the UE failing to detect a downlink control information (DCI) message within a plurality of time slots, the UE stops monitoring the PDCCH on the search space on the first CORESET.

4. The method according to claim 1, characterized in that Also includes: Detecting a TCI bit field in a downlink control information DCI message in the PDCCH on the first CORESET, the TCI bit field indicating that the UE replaces a spatial QCL field in a TCI state of the second CORESET with a spatial QCL field in the TCI state of the first CORESET; as well as In response to receiving the TCI bit field in the DCI message, replacing the spatial QCL field in the TCI state of the second CORESET with the spatial QCL field of the TCI state of the first CORESET.

5. The method according to claim 1, characterized in that Also includes: The PDCCH on the search space on the first CORESET is monitored, and a demodulation reference signal DMRS of the PDCCH is quasi co-located with respect to a receive RX spatial parameter of the first reference signal.

6. The method according to claim 5, characterized in that Also includes: A downlink control information DCI message is detected in the PDCCH on the search space on the first CORESET, where the DCI message indicates that the UE receives a physical downlink data channel PDSCH, and a DMRS of the PDSCH is quasi-co-located QCL with respect to an RX space parameter of the first reference signal.

7. The method according to claim 1, characterized in that The UE is initially configured with the first CORESET, and the spatial QCL field is not set, and the UE is not configured to monitor the PDCCH on the search space on the first CORESET.

8. The method according to claim 1, characterized in that The UE is initially configured with the first CORESET, the spatial QCL field is set to a null value, and the UE is not configured to monitor the PDCCH on the search space on the first CORESET.

9. The method according to claim 1, characterized in that: The threshold value associated with the threshold value is predefined.

10. The method according to claim 1, characterized in that The threshold is configured via a radio resource control RRC message.

11. The method according to claim 1, characterized in that: The threshold is updated via a Medium Access Control-Control Element MAC-CE message.

12. The method according to claim 1, characterized in that The UE is configured to monitor the PDCCH on the search space on the first CORESET, and the spatial QCL field in the TCI state of the first CORESET is set to a resource index of the first reference signal.

13. The method according to claim 1, characterized in that The threshold is not configured, the UE is configured to monitor the PDCCH on the search space on the first CORESET, and a demodulation reference signal DMRS of the PDCCH is quasi co-located with respect to spatial QCL information of the first reference signal.

14. The method according to claim 3, characterized in that The plurality of time slots are predefined.

15. The method according to claim 3, characterized in that The multiple time slots are configured through a radio resource control RRC message.

16. The method according to claim 3, characterized in that The plurality of time slots are configured via a Medium Access Control-Control Element MAC-CE message.

17. The method according to claim 1, characterized in that The threshold used for comparison with the number in the measurement report is Reference Signal Received Power, RSRP.

18. The method according to claim 1, characterized in that The threshold value used for comparison with the number in the measurement report is a signal to interference plus noise ratio SINR.

19. A non-transitory computer readable medium storing computer instructions, characterized in that: When the computer instructions are executed by one or more processors, the one or more processors are caused to perform the method according to any one of claims 1 to 18.

20. A communication device, characterized in that: Comprising means for performing the method as claimed in any one of claims 1 to 18.

21. A computer program product, characterized in that The method comprises computer program instructions, which, when executed by a communication device, cause the communication device to perform the method according to any one of claims 1 to 18.

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