Apparatus for processing PDCCH detection

Abstract

To provide a physical downlink control channel detection method for reducing the power consumption of a user device.SOLUTION: A communication device for processing detection of a physical downlink (DL) control channel (PDCCH) includes at least one storage device and at least one processing circuit coupled to the at least one storage device. The at least one storage device stores instructions, and the at least one processing circuit is configured to execute the instructions. The instructions include detecting a PDCCH for a first serving cell of a network according to at least one first search space (SS) set with a first group index, receiving at least one indicator in DL control information from the network, and after receiving the DCI according to one of the proposed instructions, detecting the PDCCH for the first serving cell of the network according to the at least one indicator.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an apparatus for handling detection of a physical downlink control channel (PDCCH). [Background technology]

[0002] The Long Term Evolution (LTE) system, supporting the 3rd Generation Partnership Project (3GPP) Rel-8 and / or 3GPP Rel-9 standards, is being developed by 3GPP as the successor to the Universal Mobile Telecommunications System (UMTS) to further enhance UMTS performance and meet the growing needs of users. The LTE system includes a new air interface and a new radio network architecture that provides high data rates, low latency, packet optimization, and improved system capacity and coverage.

[0003] The LTE-Advanced (LTE-A) system, as its name suggests, is an evolution of the LTE system. The LTE-A system targets faster switching between power states, improves performance at the coverage edge of evolved Node-Bs (eNBs), increases peak data rates and throughput, and includes advanced technologies such as carrier aggregation (CA), coordinated multipoint (CoMP) transmit / receive, uplink (UL) multiple-input multiple-output (UL-MIMO), and licensed-assisted access (LAA) (e.g., with LTE).

[0004] To further enhance the LTE-A system, the Next Generation Radio Access Network (NG-RAN) is being developed, which includes one or more Next Generation Node Bs (gNBs) and has characteristics such as wider operating bands, different numerologies for different frequency ranges, massive MIMO, and advanced channel coding. Summary of the Invention [Problem to be solved by the invention]

[0005] Power consumption has been a significant issue for User Equipment (UE). Various aspects of the UE have been discussed to reduce the UE's power consumption and extend the UE's standby / usage time. Unlike prior art proposals, the present invention improves the detection of the Physical Downlink (DL) Control Channel (PDCCH) to reduce the UE's power consumption.

[0006] Therefore, to solve the above-mentioned problems, the present invention provides an apparatus for processing detection of a physical downlink (DL) control channel (PDCCH). [Means for solving the problem]

[0007] This is achieved by a communication device for processing PDCCH detection according to the following independent claims. The dependent claims relate to corresponding further developments and improvements.

[0008] As will become more apparent from the detailed description below, a communication device for processing physical downlink (DL) control channel (PDCCH) detection of the present invention includes at least one memory device and at least one processing circuit coupled to the at least one memory device. the at least one storage device storing instructions and the at least one processing circuit configured to execute the instructions, the instructions including: detecting a PDCCH for a first serving cell of a network according to at least one first search space (SS) set having a first group index; receiving at least one indicator in DL control information (DCI) from the network; and detecting a PDCCH for the first serving cell of the network according to the at least one indicator after receiving the DCI according to one of: detecting a PDCCH for the first serving cell according to the at least one first SS set having the first group index according to the at least one indicator; detecting a PDCCH for the first serving cell according to at least one second SS set having a second group index according to the at least one indicator; and stopping detecting a PDCCH for the first serving cell according to at least one third SS set according to the at least one indicator for a first period of time. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of a wireless communication system according to an example of the present invention. [Figure 2] FIG. 2 is a schematic diagram of a communication device according to an example of the present invention. [Figure 3] FIG. 3 is a flow chart of a process according to one example of the present invention. [Figure 4] FIG. 4 is a schematic diagram of PDCCH detection according to an example of the present invention. [Figure 5] FIG. 5 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 6] FIG. 6 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 7] FIG. 7 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 8] FIG. 8 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 9] FIG. 9 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 10] FIG. 10 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 11] FIG. 11 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 12] FIG. 12 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 13] FIG. 13 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 14] FIG. 14 is a schematic diagram of PDCCH detection for multiple serving cells according to an example of the present invention. [Figure 15] FIG. 15 is a schematic diagram of PDCCH detection according to an example of the present invention. [Figure 16] FIG. 16 is a schematic diagram of PDCCH detection according to an example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] FIG. 1 is a schematic diagram of a wireless communication system 10 according to an example embodiment of the present invention. Briefly, the wireless communication system 10 comprises a network and multiple communication devices. The wireless communication system 10 may support a time division duplexing (TDD) mode, a frequency division duplexing (FDD) mode, a TDD-FDD joint operation mode, a non-terrestrial based network (NTN) mode, or a licensed assisted access (LAA) mode. That is, the network and communication devices may communicate with each other via an FDD carrier, a TDD carrier, a licensed carrier (licensed serving cell), and / or an unlicensed carrier (unlicensed serving cell). In addition, the wireless communication system 10 may support carrier aggregation (CA). That is, the network and communication devices may communicate with each other via multiple serving cells (e.g., multiple serving carriers), including a primary cell (e.g., primary component carrier) and one or more secondary cells (e.g., secondary component carriers).

[0011] FIG. 1 simply illustrates a network and communication devices to illustrate the structure of the wireless communication system 10. In practice, the network may be a Universal Terrestrial Radio Access Network (UTRAN) including at least one Node B (NB) in a Universal Mobile Telecommunications System (UMTS). In one example, the network may be a Long Term Evolution (LTE) system, an LTE-Advanced (LTE-A) system, or an Evolved UTRAN (E-UTRAN) including at least one evolved NB (eNB) and / or at least one relay node in an evolution of the LTE-A system. In one example, the network may be a Next Generation Radio Access Network (NG-RAN) including at least one next generation Node B (gNB) and / or at least one fifth generation (5G) base station (BS). In one example, the network may be any BS conforming to a particular communication standard for communicating with communication devices.

[0012] NR is a standard defined for 5G systems (or 5G networks) to provide a unified air interface with better performance. gNBs are being deployed to enable 5G systems that support advanced features such as enhanced mobile broadband (eMBB), highly reliable ultra-low latency communications (URLLC), and machine-type communications (mMTC) for multiple simultaneous connections. eMBB provides broadband services with high bandwidth and low / medium latency. URLLC provides applications (e.g., end-to-end communications) with higher reliability and low latency. Application examples include the industrial internet, smart grids, infrastructure protection, remote surgery, and intelligent transportation systems (ITS). mMTC can support the Internet of Things (IoT) of 5G systems, which include billions of connected devices and / or sensors.

[0013] Furthermore, the network may also include at least one of a UTRAN / E-UTRAN / NG-RAN and a core network. The core network may include network entities such as a mobility management entity (MME), a service gateway (S-GW), a packet data network (PDN) gateway (P-GW), a self-organizing network (SON) server, and / or a radio network controller (RNC). In one example, after the network receives information transmitted by a communication device, the information is processed only by the UTRAN / E-UTRAN / NG-RAN, and a decision corresponding to the information is made in the UTRAN / E-UTRAN / NG-RAN. In another example, the UTRAN / E-UTRAN / NG-RAN forwards the information to the core network, and a decision corresponding to the information is made in the core network after the core network processes the information. In another example, the information may be processed by both the UTRAN / E-UTRAN / NG-RAN and the core network, and a decision is made after coordination and / or collaboration between the UTRAN / E-UTRAN / NG-RAN and the core network.

[0014] The communication device may be a user equipment (UE), a low-cost device (e.g., a machine-type communication (MTC) device), a device-to-device (D2D) communication device, a narrowband Internet of Things (IoT) (NB-IoT), a mobile phone, a laptop, a tablet computer, an e-book, a portable computer system, or a combination thereof. In addition, the network and the communication device may be considered as a transmitter or a receiver depending on the direction (i.e., transmission direction), e.g., for uplink (UL), the communication device is the transmitter and the network is the receiver, and for downlink (DL), the network is the transmitter and the communication device is the receiver.

[0015] FIG. 2 is a schematic diagram of a communication device 20 according to an example of the present invention. The communication device 20 may be, but is not limited to, the communication device or network shown in FIG. 1 . The communication device 20 may include at least one processing circuit 200, such as a microprocessor or an application-specific integrated circuit (ASIC), at least one storage device 210, and at least one communication interface device 220. The at least one storage device 210 may be any data storage device capable of storing program code 214 that can be accessed and executed by the at least one processing circuit 200. Examples of the at least one storage device 210 include, but are not limited to, a subscriber identity module (SIM), read-only memory (ROM), flash memory, random access memory (RAM), compact disc read-only memory (CD-ROM), digital versatile disc ROM (DVD-ROM), Blu-ray disc ROM (BD-ROM), magnetic tape, hard disk, optical data storage device, non-volatile storage device, non-transitory computer-readable medium (e.g., tangible media), etc. The at least one communication interface device 220 is preferably at least one transceiver, and is used to transmit and receive signals (eg, data, messages and / or packets) according to the processing results of the at least one processing circuit 200 .

[0016] 3 is a flowchart of a process 30 according to an example of the present invention. The process 30 may be utilized in a communication device to handle detection of a physical DL control channel (PDDCCH). The process 30 may be compiled into the program code 214 and may include the following steps: Step 300: Start. Step 302: Detect a PDCCH for a first serving cell of a network according to at least one first search space (SS) set having a first group index. Step 304: Receive at least one indicator in DL control information (DCI) from the network. Step 306: After receiving the DCI, detect a PDCCG for a first serving cell of the network according to at least one indicator according to one of the following instructions: detect a PDCCH for the first serving cell according to at least one first SS set having a first group index according to the at least one indicator; detect a PDCCH for the first serving cell according to at least one second SS set having a second group index according to the at least one indicator; and stop detecting a PDCCH for the first serving cell according to at least one third SS set according to the at least one indicator for a first period. Step 308: End.

[0017] According to process 30, a communication device detects (e.g., monitors, receives) a PDCCH for a first serving cell of a network according to (e.g., via) at least one first SS set having a first group index. The communication device receives at least one indicator in a DCI from the network (e.g., after detecting the PDCCH). Then, after receiving the DCI, the communication device detects a PDCCH for the first serving cell of the network according to the at least one indicator according to one of the following instructions: detect a PDCCH for the first serving cell according to (e.g., via) the at least one first SS set having a first group index according to the at least one indicator; detect a PDCCH for the first serving cell according to at least one second SS set having a second group index according to the at least one indicator; and stop detecting a PDCCH for the first serving cell according to at least one third SS set according to the at least one indicator for a first period. That is, the communication device continues detecting the PDCCH of the same SS set, changes to detecting the PDCCH of a different SS set, or stops detecting the PDCCH according to the received indicator. That is, the PDCCH can be detected according to various numbers of SS sets. Therefore, the power consumption of the communication device can be adaptively controlled via at least one indicator. As a result, the power consumption problem is solved.

[0018] The implementation of the process 30 is not limited to the above description. The following examples may be applied to the implementation of the process 30.

[0019] In one example, when the communications device detects a PDCCH for a first serving cell according to at least one first SS set having a first group index according to the at least one indicator, the communications device stops detecting a PDCCH for the first serving cell according to at least one fourth SS set having a different group index.

[0020] In one example, when the communications device detects a PDCCH for the first serving cell according to at least one second SS set having a second group index according to the at least one indicator, the communications device stops detecting a PDCCH for the first serving cell according to at least one fifth SS set having a different group index.

[0021] In one example, the first period is configured by higher layer signaling or indicated in a DCI. The DCI may be scrambled by a Cellular Radio Network Temporary Identifier (C-RNTI) or a Power-Saving RNTI (PS-RNTI). The DCI may be received at a UE-specific SS or a common SS.

[0022] In one example, the first group index is configured by higher layer signaling.

[0023] In one example, the communication device determines that the sixth group index of the at least one sixth SS set is a default group index if the at least one sixth SS set is not configured with a group index.

[0024] In one example, one of the at least one first SS set is configured with a second group index, i.e., the SS set may be configured with two group indices.

[0025] In one example, the first group index is determined according to a CORESET Pool Index for a CORESET associated with one of the at least one first SS set.

[0026] In one example, the communication device detects a PDCCH for a first serving cell according to a predetermined SS set. The communication device stops detecting a PDCCH for the first serving cell according to at least one third SS set, except for the predetermined SS set, when the communication device stops detecting a PDCCH for the first serving cell according to at least one third SS set for a first period according to at least one indicator. That is, detection of a PDCCH for the predetermined SS set is not affected by the at least one indicator. In one example, the predetermined SS set includes a common SS set (CSS). In one example, the predetermined SS set includes a UE-specific SS (USS) set having an SS set index.

[0027] In one example, the communications device may stop detecting the PDCCH for the first serving cell when, according to the at least one indicator, the communications device stops detecting the PDCCH for the first serving cell according to the at least one third SS set for a first period of time, i.e., detection of all SSs for the first serving cell may be stopped.

[0028] In one example, the communications device detects a PDCCH for the first serving cell according to at least one second SS set having a second group index in accordance with the at least one indicator after a second period of time after receiving the at least one indicator.

[0029] In one example, the communications device stops detecting a PDCCH for a first serving cell according to at least one first SS set having a first group index according to the at least one indicator for a first period of time after a third period of time after receiving the at least one indicator.

[0030] In one example, the communication device detects a PDCCH for the first serving cell according to at least one seventh SS set having a default group index when the timer expires. In one example, the communication device stops detecting a PDCCH for the first serving cell according to at least one eighth SS set having another group index. In one example, the value of the default group index is 0. In one example, the value of the timer is less than or equal to the value of a bandwidth portion (BWP) inactivity timer for the first serving cell.

[0031] In one example, the second group index is associated with an empty SS set. In one example, the communication device stops a BWP inactivity timer for the first serving cell when detecting a PDCCH for the first serving cell according to at least one second SS set having the second group index according to the at least one indicator. In one example, the communication device changes (or switches) an active BWP according to expiration of the BWP inactivity timer, where the active BWP is a default BWP or a dormancy BWP (e.g., configured by the network).

[0032] In one example, the communications device stops a BWP inactivity timer for a first serving cell when the communications device stops detecting a PDCCH for the first serving cell for a first period according to the at least one indicator.

[0033] In one example, when the communication device stops detecting a PDCCH for a first serving cell according to at least one third SS set for a first period according to at least one indicator, the communication device changes (or switches) the active BWP according to expiration of a BWP inactivity timer, and the active BWP is a default BWP or a dormant BWP (e.g., configured by the network).

[0034] In one example, at least one first SS set is configured for BWP of a first serving cell.

[0035] In one example, the at least one second SS set is configured for BWP of the first serving cell.

[0036] In one example, the first serving cell is a scheduled cell of a second serving cell configured by the network.

[0037] In one example, the communications device detects a PDCCH according to at least one ninth SS set for a second serving cell, and at least one identity of the at least one eighth SS set of the second serving cell includes at least one identity of the at least one first SS set of the first serving cell when detecting a PDCCH for a first serving cell according to at least one first SS set having a first group index according to the at least one indicator.

[0038] In one example, the communications device stops detecting a PDCCH for a first serving cell according to at least one first SS set and stops detecting a PDCCH for a second serving cell according to at least one eighth SS set according to the at least one indicator.

[0039] In one example, the communication device detects a PDCCH for a second serving cell according to a predetermined SS set, and when the communication device stops detecting the PDCCH for the second serving cell according to at least one ninth SS set for a fourth period according to the at least one indicator, the communication device stops detecting the PDCCH for the second serving cell according to at least one ninth SS set except for the predetermined SS set.

[0040] In one example, the communications device stops detecting the PDCCH for the second serving cell according to the at least one eighth SS set a fifth time period after receiving the at least one indicator, where the fifth time period and the third time period may be the same.

[0041] In one example, the at least one indicator indicates detecting a PDCCH for a first serving cell. In one example, the at least one indicator indicates detecting a PDCCH for a plurality of serving cells including the first serving cell.

[0042] FIG. 4 is a schematic diagram of PDCCH detection according to an example of the present invention. There are available SS sets SS1 to SS9 configured by the network for the BWP (e.g., active BWP) of the serving cell. SS sets SS1 to SS9 are configured with SS set indices 1 to 9, respectively. The SS set indices for the SS sets may be 0, 1, . . . , 38, or 39. SS sets SS1 to SS3 are configured with group index 0 (e.g., SS10 to SS30), and SS sets SS4 to SS9 are configured with group index 1 (e.g., SS41 to SS91). The communication device may receive a first indicator in DCI (e.g., in DCI received in a USS) from the network. The first indicator may indicate group index 1 for the SS set. The communication device detects the PDCCH according to SS sets SS4 to SS9 according to the first indicator (e.g., after a first period after receiving the first indicator). The communication device may receive a second indicator in DCI from the network. The second indicator may indicate group index 0 for the SS set. The communication device detects the PDCCH according to the SS sets SS1 to SS3 according to the second indicator (eg, after a second period after receiving the second indicator).

[0043] In one example, the second indicator may be generated according to expiration of a timer of the communication device. The second indicator may indicate a default group index (e.g., 0) for the SS set. The communication device detects the PDCCH according to the SS sets SS1 to SS3 according to the second indicator. In one example, the value of the timer may be less than or equal to the value of a BWP inactivity timer. The BWP inactivity timer may indicate to the communication device to change the active BWP (e.g., default BWP) when the BWP inactivity timer expires.

[0044] In one example, the communications device may receive a third indicator in the DCI from the network. The third indicator may indicate a group index for the SS set, where no SS set associated with the group index exists (i.e., an empty SS set). The communications device may stop a BWP inactivity timer for the serving cell.

[0045] In one example, the communication device may receive a fourth indicator in the DCI from the network. The fourth indicator may indicate a group index for the SS set, and no SS set associated with the group index exists (i.e., an empty SS set). The communication device may change the active BWP according to expiration of a BWP inactivity timer. The active BWP may be a default BWP or a dormant BWP.

[0046] In one example, the SS set may be composed of multiple group indices (e.g., 0 and 1), and each group index may correspond to a monitoring slot periodicity (e.g., P0 and P1) and / or a monitoring slot offset (e.g., O0 and O1) for the SS set. In this case, if the fifth indicator indicates group index 0, the communications device may detect the PDCCCH according to the SS set having the monitoring slot periodicity (e.g., P0) and / or the monitoring slot offset (e.g., O0).

[0047] 5 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0048] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1, and there are SS sets SS11 to SS20 for BWP BP2 (i.e., inactive BWP) of serving cell CL1. SS sets SS1 to SS4 and SS11 to SS13 are configured with group index 0. SS sets SS5 to SS10 and SS14 to SS20 are configured with group index 1.

[0049] For a serving cell, a communication device may be configured with multiple (e.g., up to four) BWPs, and one BWP may be activated at a given time period. As shown in Figure 5, there are SS sets SS1, SS3, SS5,..., SS19 for BWP BP3 (i.e., inactive BWP) of serving cell CL2, and there are SS sets SS0, SS2, SS4,..., SS20 for BWP BP4 (i.e., active BWP) of serving cell CL2. SS sets SS1 to SS3 and SS11 to SS12 are configured with group index 0. SS sets SS4 to SS10 and SS13 to SS20 are configured with group index 1.

[0050] The communication device may receive an indicator in DCI (e.g., in DCI received in a USS) from the network. The indicator may indicate (0, 1) for serving cells CL1 and CL2, respectively. The communication device detects PDCCHs according to SS sets SS1 to SS20 for serving cells CL1 and CL2 according to the indicator.

[0051] In particular, the communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS4 according to which group index 0 includes (e.g., is equal to) indicator 0 and the BWPs of SS sets SS1 to SS4 are active BWPs. The PDCCH for serving cell CL1 is not detected according to SS sets SS5 to SS20. This may be because group index 1 is not included in indicator 0.

[0052] In addition, the communication device detects the PDCCH for serving cell CL2 according to SS set SS4 according to which group index 1 includes (e.g., is equal to) indicator 1, the BWP of SS set SS4 is an active BWP, and the PDCCH for serving cell CL1 is also detected according to SS set SS4 (i.e., SS set SS4 is used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS1-SS3 and SS5-SS20. The reason may be that group index 0 does not include indicator 1 or the SS set is not mapped by the detected SS set of serving cell CL1.

[0053] 6 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0054] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1. SS sets SS1 to SS4 are configured with group index (0, 1) (e.g., SS1 0、1 ~SS4 0、1 ) SS sets SS5 to SS10 are configured with group index 1 (for example, SS51 to SS101).

[0055] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. SS sets SS1 and SS11 are configured with group index (0, 1) (e.g., SS1 0、1 ~SS11 0、1) SS sets SS3, SS5, SS7, SS9, SS13, SS15, SS17 and SS19 are configured with group index 1 (e.g., SSX1).

[0056] In one example, the group indices of SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19 for BWP BP2 of serving cell CL2 may be configured by the network. In one example, the group indices of SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19 for BWP BP2 of serving cell CL2 may be the same as the group indices of SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19 of serving cell CL1 (i.e., scheduling cell). In this case, for serving cell CL2, SS sets SS1 and SS3 have group indices (0, 1) (e.g., SS1 0、1 , SS3 0、1 ), SS sets SS5, SS7, and SS9 have group index 1 (SS51, SS71, SS91). In one example, if an SS set is not configured with a group index, the group index of the SS set for the BWP of the serving cell may be a default value (e.g., 1).

[0057] The communication device may receive an indicator in the DCI (e.g., in the DCI received in the USS) from the network. The indicator may indicate 0 for both serving cells CL1 and CL2. The communication device detects (e.g., monitors) the PDCCH according to the above SS set for serving cells CL1 and CL2 according to the indicator.

[0058] In particular, the communication device detects the PDCCH for the serving cell CL1 according to the SS sets SS1 to SS4 according to which the group index (0, 1) includes indicator 0 and the BWP BP1 is the active BWP, and the PDCCH for the serving cell CL1 is not detected according to the SS sets SS5 to SS10.

[0059] In addition, the communication device detects the PDCCH for serving cell CL2 according to SS set SS1 according to which group index (0, 1) includes indicator 0, BWP BP2 is an active BWP, and the PDCCH for serving cell CL1 is also detected according to SS set SS1 (i.e., SS set SS1 is used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The reason may be that the group index does not include indicator 0 or the SS sets are not mapped by the detected SS sets of serving cell CL1.

[0060] 7 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0061] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1. SS sets SS1 to SS4 are configured with group index (0, 1) (e.g., SS1 0、1 ~SS4 0、1 ) SS sets SS5 to SS10 are configured with group index 1 (for example, SS51 to SS101).

[0062] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. SS set SS1 is configured with group index (0, 1) (e.g., SS1 0、1 ) SS sets SS11, SS15, and SS19 are configured with group index 0 (e.g., SSX0). SS sets SS3, SS5, SS7, SS9, SS13, and SS19 are configured with group index 1 (e.g., SSX1).

[0063] The communication device may receive an indicator in the DCI (e.g., in the DCI received in the USS) from the network. The indicator may indicate 0 and 1 for serving cells CL1 and CL2, respectively. The communication device detects the PDCCH according to the above-mentioned SS set for serving cells CL1 and CL2 according to the indicator.

[0064] In particular, the communication device detects the PDCCH for the serving cell CL1 according to the SS sets SS1 to SS4 according to which the group index (0, 1) includes indicator 0 and the BWP BP1 is the active BWP, and the PDCCH for the serving cell CL1 is not detected according to the SS sets SS5 to SS10.

[0065] In addition, the communication device detects the PDCCH for serving cell CL2 according to SS sets SS1 and SS3 according to which group index (0, 1) and 1 include indicator 1, BWP BP2 is the active BWP, and the PDCCH for serving cell CL1 is also detected according to SS sets SS1 and SS3 (i.e., SS sets SS1 and SS3 are used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The reason may be that the group index does not include indicator 1 or the SS sets are not mapped by the detected SS sets of serving cell CL1.

[0066] 8 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0067] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1. SS sets SS1 to SS4 are configured with group index 0 (e.g., SS10 to SS40). SS sets SS5 to SS10 are configured with group index 1 (e.g., SS51 to SS101).

[0068] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The above SS sets are not configured with group indices.

[0069] The communication device may receive an indicator in the DCI (e.g., in the DCI received in the USS) from the network. The indicator may indicate 1 for serving cells CL1 and CL2. The communication device detects (e.g., monitors) the PDCCH according to the above-mentioned SS set for serving cells CL1 and CL2 according to the indicator.

[0070] In particular, the communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS10 according to which group index 1 includes (e.g., is equal to) indicator 1 and BWP BP1 is the active BWP, and the PDCCH for serving cell CL1 is not detected according to SS sets SS1 to SS4.

[0071] In addition, the communication device detects the PDCCH for serving cell CL2 according to SS sets SS5, SS7, and SS9 according to which BWP BP2 is an active BWP and the PDCCH for serving cell CL1 is also detected according to SS sets SS5, SS7, and SS9 (i.e., SS sets SS5, SS7, and SS9 are used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS1, SS3, SS11, SS13, SS15, SS17, and SS19. This may be because the SS sets are not mapped by the detected SS sets of serving cell CL1.

[0072] Therefore, even if the SS set of serving cell CL2 is not configured with a group index, the PDCCH for serving cell CL2 can still be detected according to the detection of the PDCCH for serving cell CL1.

[0073] 9 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0074] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1. SS sets SS1 to SS4 are configured with group index 0 (e.g., SS10 to SS40). SS sets SS5 to SS10 are configured with group index 1 (e.g., SS51 to SS101).

[0075] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The above SS sets are not configured with group indices.

[0076] The communication device may receive an indicator in the DCI (e.g., in the DCI received in the USS) from the network. The indicator may indicate 0 for serving cells CL1 and CL2. The communication device detects (e.g., monitors) the PDCCH according to the above-mentioned SS set for serving cells CL1 and CL2 according to the indicator.

[0077] In particular, the communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS4 according to which group index 0 includes (e.g., is equal to) indicator 0 and BWP BP1 is the active BWP, and the PDCCH for serving cell CL1 is not detected according to SS sets SS5 to SS10.

[0078] Additionally, indicator 0 means that for serving cell CL2, all SS sets except one SS set (e.g., a predetermined SS set) are not used to detect the PDCCH. That is, indicator 0 means that PDCCH detection (monitoring) for serving cell CL2 is "off" or "stopped" except for one SS set. In one example, the only SS set used may be the SS set with the smallest index, i.e., SS set SS1. In one example, the only SS set used may be at least one SS set. The communication device detects the PDCCH for serving cell CL2 according to SS set SS1 in accordance with indicator 0. The PDCCH for serving cell CL2 is not detected according to other SS sets.

[0079] Therefore, even if the SS set of serving cell CL2 is not configured with a group index, the PDCCH for serving cell CL2 can still be detected according to the detection of the PDCCH for serving cell CL1.

[0080] 10 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0081] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1. SS sets SS1 to SS4 are configured with group index 0 (e.g., SS10 to SS40). SS sets SS5 to SS10 are configured with group index 1 (e.g., SS51 to SS101).

[0082] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The above SS sets are not configured with group indices.

[0083] The communication device may receive two indicators in the DCI (e.g., in the DCI received in the USS) from the network. The indicators may indicate 0 and 1 for serving cells CL1 and CL2, respectively. The communication device detects (e.g., monitors) the PDCCH according to the above-mentioned SS set for serving cells CL1 and CL2 according to the indicators.

[0084] In particular, the communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS4 according to which group index 0 includes (e.g., is equal to) indicator 0 and BWP BP1 is the active BWP, and the PDCCH for serving cell CL1 is not detected according to SS sets SS5 to SS10.

[0085] Additionally, indicator 1 means that for serving cell CL2, an SS set can be used to detect the PDCCH. That is, indicator 1 means that PDCCH detection (monitoring) for serving cell CL2 is "on" or "enabled." The communication device detects the PDCCH for serving cell CL2 according to SS sets SS1 and SS3 according to which BWP BP2 is an active BWP, and the PDCCH for serving cell CL1 is also detected according to SS sets SS1 and SS3 (that is, SS sets SS1 and SS3 are used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. This may be because the SS sets are not mapped by the detected SS sets of serving cell CL1.

[0086] Therefore, even if the SS set of serving cell CL2 is not configured with a group index, the PDCCH for serving cell CL2 can still be detected according to the detection of the PDCCH for serving cell CL1.

[0087] 11 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0088] There are SS sets SS1 to SS10 for BWP BP1 (i.e., active BWP) of serving cell CL1. SS sets SS1 to SS4 are configured with group index 0 (e.g., SS10 to SS40). SS sets SS5 to SS10 are configured with group index 1 (e.g., SS51 to SS101).

[0089] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The above SS sets are not configured with group indices.

[0090] The communication device may receive two indicators in the DCI (e.g., in the DCI received in the USS) from the network. The indicators may indicate 0 for both serving cells CL1 and CL2. The communication device detects (e.g., monitors) the PDCCHs according to the above-mentioned SS sets for serving cells CL1 and CL2 according to the indicators.

[0091] In particular, the communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS4 according to which group index 0 includes (e.g., is equal to) indicator 0 and BWP BP1 is the active BWP, and the PDCCH for serving cell CL1 is not detected according to SS sets SS5 to SS10.

[0092] Additionally, indicator 0 means that for serving cell CL2, all SS sets except one SS set (e.g., a predetermined SS set) are not used to detect the PDCCH. That is, indicator 0 means that PDCCH detection (monitoring) for serving cell CL2 is "off" or "stopped" except for one SS set. In one example, the only SS set used may be the SS set with the smallest index, i.e., SS set SS1. In one example, the only SS set used may be at least one SS set. The communication device detects the PDCCH for serving cell CL2 according to SS set SS1 in accordance with indicator 0. The PDCCH for serving cell CL2 is not detected according to other SS sets.

[0093] Therefore, even if the SS set of serving cell CL2 is not configured with a group index, the PDCCH for serving cell CL2 can still be detected according to the detection of the PDCCH for serving cell CL1.

[0094] 12 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0095] There are SS sets SS1 to SS10 for BWP BP1 (ie, active BWP) of serving cell CL1. The above SS sets are not configured with group indices.

[0096] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. SS sets SS1, SS3, and SS11 are configured with group index 0 (e.g., SSX0). SS sets SS5, SS7, SS9, SS13, SS15, SS17, and SS19 are configured with group index 1 (e.g., SSX1).

[0097] The communication device may receive two indicators in the DCI (e.g., in the DCI received in the USS) from the network. The indicators may indicate 1 for both serving cells CL1 and CL2. The communication device detects (e.g., monitors) the PDCCHs according to the above-mentioned SS sets for serving cells CL1 and CL2 according to the indicators.

[0098] In particular, indicator 1 means that for serving cell CL1, the SS set can be used to detect the PDCCH. That is, indicator 1 means that PDCCH detection (monitoring) for serving cell CL1 is "on" or "enabled." The communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS10 according to which BWP BP1 is the active BWP.

[0099] Additionally, the communications device detects the PDCCH for serving cell CL2 according to SS sets SS5, SS7, and SS9 according to which group index 1 includes (e.g., is equal to) indicator 1, BWP BP2 is an active BWP, and the PDCCH for serving cell CL1 is also detected according to SS sets SS5, SS7, and SS9 (i.e., SS sets SS5, SS7, and SS9 are used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS1, SS3, SS11, SS13, SS15, SS17, and SS19. The reason may be that the group index does not include indicator 1 or the SS sets are not mapped by the detected SS sets of serving cell CL1.

[0100] Therefore, even if the SS set of serving cell CL1 is not configured with a group index, the PDCCH for serving cell CL1 can still be detected.

[0101] 13 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0102] There are SS sets SS1 to SS10 for BWP BP1 (ie, active BWP) of serving cell CL1. The above SS sets are not configured with group indices.

[0103] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. SS sets SS1, SS3, and SS11 are configured with group index 0 (e.g., SSX0). SS sets SS5, SS7, SS9, SS13, SS15, SS17, and SS19 are configured with group index 1 (e.g., SSX1).

[0104] The communication device may receive two indicators in the DCI (e.g., in the DCI received in the USS) from the network. The indicators may indicate 1 and 0 for serving cells CL1 and CL2, respectively. The communication device detects (e.g., monitors) the PDCCH according to the above-mentioned SS set for serving cells CL1 and CL2 according to the indicators.

[0105] In particular, indicator 1 means that for serving cell CL1, the SS set can be used to detect the PDCCH. That is, indicator 1 means that PDCCH detection (monitoring) for serving cell CL1 is "on" or "enabled." The communication device detects the PDCCH for serving cell CL1 according to SS sets SS1 to SS10 according to which BWP BP1 is the active BWP.

[0106] Additionally, the communications device detects the PDCCH for serving cell CL2 according to SS sets SS1 and SS3 according to which group index 0 includes (e.g., is equal to) indicator 0, BWP BP2 is an active BWP, and the PDCCH for serving cell CL1 is also detected according to SS sets SS1 and SS3 (i.e., SS sets SS1 and SS3 are used for both serving cells). The PDCCH for serving cell CL2 is not detected according to SS sets SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. The reason may be that the group index does not include indicator 0 or the SS sets are not mapped by the detected SS sets of serving cell CL1.

[0107] Therefore, even if the SS set of serving cell CL1 is not configured with a group index, the PDCCH for serving cell CL1 can still be detected.

[0108] 14 is a schematic diagram of PDCCH detection for multiple serving cells according to an embodiment of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. Serving cell CL1 may be a scheduling cell, and serving cell CL2 may be a scheduled cell. In this case, serving cell CL1 is the scheduling cell for serving cells CL1 and CL2.

[0109] There are SS sets SS1 to SS10 for BWP BP1 (ie, active BWP) of serving cell CL1. The above SS sets are not configured with group indices.

[0110] For BWP BP2 (i.e., active BWP) of serving cell CL2, there are SS sets SS1, SS3, SS5, SS7, SS9, SS11, SS13, SS15, SS17, and SS19. SS sets SS1, SS3, and SS11 are configured with group index 0 (e.g., SSX0). SS sets SS5, SS7, SS9, SS13, SS15, SS17, and SS19 are configured with group index 1 (e.g., SSX1).

[0111] The communication device may receive two indicators in the DCI (e.g., in the DCI received in the USS) from the network. The indicators may indicate 0 and 1 for serving cells CL1 and CL2, respectively. The communication device detects (e.g., monitors) the PDCCH according to the above-mentioned SS set for serving cells CL1 and CL2 according to the indicators.

[0112] In particular, indicator 0 means that for serving cell CL1, no SS set is used to detect the PDCCH. That is, indicator 0 means that PDCCH detection (monitoring) of serving cell CL1 is "off" or "stopped." Note that one SS set may be an exception. For example, the communication device may detect the PDCCH according to the USS and / or CSS, for example, according to the SS set having the smallest SS set index or at least one predetermined SS set index.

[0113] In addition, the PDCCH for serving cell CL2 is not detected, which may be because the SS set is not mapped by the detected SS set of serving cell CL1, i.e., the SS set of serving cell CL2 is also turned off by indicator 0 for serving cell CL1.

[0114] 15 is a schematic diagram of PDCCH detection according to an example of the present invention. There are serving cells CL1 and CL2 to realize self-scheduling and cross-carrier scheduling. The serving cell CL1 may be a scheduling cell, and the serving cell CL2 may be a scheduled cell. In this case, the serving cell CL1 is the scheduling cell for the serving cells CL1 and CL2. There are SS sets SS1 to SS3 for the serving cell CL1, and there are SS sets SS2 to SS3 for the serving cell CL2.

[0115] The communication device detects the PDCCH for the serving cell CL1 according to the SS sets SS1 to SS3, and detects the PDCCH for the serving cell CL2 according to the SS sets SS2 to SS3.

[0116] The communication device may then receive an indicator in the DCI from the network (e.g., in the DCI received in the USS). The indicator may indicate to the communication device to stop detecting the PDCCH for serving cell CL1 for a period T1 (e.g., after a third period after receiving the indicator). In period T1, the communication device detects the PDCCH for serving cells CL1 and CL2 according to a predetermined SS set (e.g., SS set SS2) and stops detecting the PDCCH for serving cells CL1 and CL2 according to other SS sets. The predetermined SS set may be configured via higher layer signaling, may have the smallest SS set index, or may include a CSS set, for example.

[0117] After the period T1, the communication device continues to detect the PDCCH for the serving cell CL1 according to the SS sets SS1 to SS3, and detects the PDCCH for the serving cell CL2 according to the SS sets SS2 to SS3.

[0118] In one example, when the communication device stops detecting a PDCCH for the serving cell CL1 for a period T1 according to the indicator, the communication device may stop a BWP inactivity timer for the first serving cell. In one example, when the communication device stops detecting a PDCCH for the serving cell CL1 for a period T1 according to the indicator, the communication device may change the active BWP according to expiration of the BWP inactivity timer. The active BWP may be a default BWP or a dormant BWP. In one example, the communication device may stop a BWP inactivity timer in the default BWP or a dormant BWP. In one example, the communication device may not perform PDCCH detection in a dormant BWP (e.g., there is no PDCCH configuration for the dormant BWP).

[0119] 16 is a schematic diagram of PDCCH detection according to an example of the present invention. There are SS1 to SS9 for the BWP (e.g., active BWP) of the serving cell. SS sets SS1 to SS3 are configured with group index 0 (e.g., SS10 to SS30), and SS sets SS4 to SS9 are configured with group index 1 (e.g., SS41 to SS91). In addition, SS sets configured with group index 0 (e.g., SS10 to SS30) may be associated with at least one CORESET configured with CORESETPoolInex=0, and SS sets configured with group index 1 (e.g., SS41 to SS91) may be associated with at least one CORESET configured with CORESETPoolInex=0 and 1.

[0120] The communication device may detect the PDCCH via two receive beams RB1 and RB2 generated by two panels PLA and PLB of the communication device, respectively. The panels PLA and PLB may correspond to CORESET pool indices CPI1 and CPI2, respectively.

[0121] The communications device may receive a first indicator in a DCI from the network (e.g., in a DCI received in a USS), which may indicate 1 to indicate to the communications device to detect a PDCCH at time T1 via an SS set (e.g., SS sets SS1-SS9) corresponding to at least one CORESET configured with CORESEPoolIndex=0 and 1.

[0122] The communications device may receive a second indicator in the DCI from the network (e.g., in the DCI received in the USS), which may indicate 0 to indicate to the communications device to detect the PDCCH at time T2 via an SS set (e.g., SS sets SS1-SS3) corresponding to at least one CORESET configured with CORESEPoolIndex=0.

[0123] The action "determine" above may be replaced with the actions "calculate," "compute," "obtain," "generate," "output," "use," "select / select," or "determine" or "configured." The action "detect" above may be replaced with the actions "monitor," "receive," "sense," or "obtain." The term "according to" above may be replaced with "correspondingly." The term "related to" above may be replaced with "of" or "corresponding." The term "via" above may be replaced with "on," "in," or "at."

[0124] Those skilled in the art can easily combine, modify, and / or change the above descriptions and examples. The above description, steps, and / or processes including suggested steps can be realized by means that can be hardware, software, firmware (also known as a combination of a hardware device and computer instructions and data residing as read-only software on a hardware device), electronic system, or a combination thereof. One example of a means can be a communication device 20.

[0125] Examples of hardware include analog circuitry, digital circuitry, and / or mixed circuitry. For example, hardware may include an ASIC, a field programmable gate array (FPGA), a programmable logic device, concatenated hardware components, or a combination thereof. In another example, hardware may include a general-purpose processor, a microprocessor, a controller, a digital signal processor (DSP), or a combination thereof.

[0126] Examples of software include a set of code, a set of instructions, and / or a set of functions that are retained (e.g., stored) in a storage unit, e.g., a computer-readable medium. The computer-readable medium may include a SIM, a ROM, a flash memory, a RAM, a CD-ROM / DVD-ROM / BD-ROM, a magnetic tape, a hard disk, an optical data storage device, a non-volatile storage device, or a combination thereof. The computer-readable medium (e.g., a storage unit) may be internally (e.g., integrated) or externally (e.g., separate) coupled to at least one processor. At least one processor, which may include one or more modules, may execute (e.g., be configured to execute) the software in the computer-readable medium. The set of code, the set of instructions, and / or the set of functions may cause at least one processor, module, hardware, and / or electronic system to perform associated steps.

[0127] Examples of electronic systems include a system on a chip (SoC), a system in a package (SiP), a computer on a module (CoM), a computer program product, a device, a mobile phone, a laptop, a tablet computer, an e-book or a portable computer system and a communication device 20.

[0128] In summary, the present invention provides a communication device for managing power consumption. To control PDCCH detection, the SS set index, group index, and indicator are all taken into consideration. Therefore, the PDCCH can be detected according to various numbers of SS sets. As a result, the power consumption of the communication device can be adaptively controlled.

Claims

1. 1. A communications apparatus for processing detection of a physical downlink (DL) control channel (PDCCH), the communications apparatus comprising: at least one storage device; at least one processing circuit coupled to the at least one memory device; The at least one storage device stores instructions, and the at least one processing circuit is configured to execute the instructions, the instructions comprising: Detecting a PDCCH for a first serving cell of the network according to at least one first search space (SS) set having a first group index; receiving at least one indicator in DL control information (DCI) from the network; suspending, for a first period of time, detecting a PDCCH for the first serving cell according to at least one third SS set according to the at least one indicator; Detecting a PDCCH for the first serving cell according to a predetermined SS set; stopping detecting a PDCCH for the first serving cell according to at least one third SS set other than the predetermined SS set when stopping detecting a PDCCH for the first serving cell according to at least one third SS set for a first period according to the at least one indicator; If a timer expires, detecting a PDCCH for the first serving cell according to at least one seventh SS set having a default group index; stopping detecting a PDCCH for the first serving cell according to at least one eighth SS set having another group index; Including, the first period is configured by an upper layer signal; the predetermined SS set comprises a common SS (CSS) set; the at least one indicator indicates detecting PDCCHs for a plurality of serving cells including the first serving cell; The communication device, wherein the value of the default group index is 0.

2. The instruction: and stopping detecting a PDCCH for the first serving cell according to at least one fourth SS set having another group index when detecting a PDCCH for the first serving cell according to the at least one first SS set having the first group index according to the at least one indicator; The communication device of claim 1 .

3. The instruction: and stopping detecting a PDCCH for the first serving cell according to at least one fifth SS set having another group index when detecting a PDCCH for the first serving cell according to at least one second SS set having a second group index according to the at least one indicator; 3. The communication device according to claim 1, comprising:

4. The communication device according to claim 1 , wherein the first group index is configured by a higher layer signal.

5. The instruction: If the at least one sixth SS set is not configured with a group index, determining that the sixth group index of the at least one sixth SS set is a default group index; 5. A communication device according to claim 1, comprising:

6. The communication device according to claim 1 or 2, wherein one of the at least one first SS set is configured with a second group index.

7. The instruction: stopping, for the first period, detecting a PDCCH for the first serving cell according to the at least one third SS set according to the at least one indicator; 7. A communication device according to claim 1, comprising:

8. 3. The communication device of claim 1, wherein the communication device detects a PDCCH for the first serving cell according to at least one second SS set having a second group index according to the at least one indicator after a second period after receiving the at least one indicator.

9. 9. The communication device according to claim 1, wherein the communication device stops detecting a PDCCH for the first serving cell according to the at least one first SS set having the first group index according to the at least one indicator for the first period after a third period after receiving the at least one indicator.

10. The communication device of claim 3 , 6 or 8 , wherein the second group index is associated with an empty SS set.

11. The instruction: changing an active BWP according to expiration of a BWP inactivity timer, the active BWP being a default BWP or a dormant BWP; The communication device of claim 10, comprising:

12. The instruction: stopping a BWP inactivity timer for the first serving cell when stopping detecting a PDCCH for the first serving cell for the first period according to the at least one indicator; 12. A communication device according to any preceding claim, comprising:

13. The instruction: changing an active BWP according to expiration of a BWP inactivity timer when stopping detecting a PDCCH for the first serving cell according to the at least one third SS set according to the at least one indicator for the first period, wherein the active BWP is a default BWP or a dormant BWP; 13. A communication device according to any preceding claim, comprising:

14. 14. The communication device of claim 1, wherein the first serving cell is a scheduled cell of a second serving cell configured by the network.

15. The instruction: Detecting a PDCCH according to at least one ninth SS set for the second serving cell, wherein at least one identity of the at least one ninth SS set of the second serving cell includes at least one identity of the at least one first SS set of the first serving cell when detecting a PDCCH for the first serving cell according to the at least one first SS set having the first group index according to the at least one indicator; 15. The communication device of claim 14, comprising:

16. The instruction: stopping, for a fourth period, detecting a PDCCH for the second serving cell according to at least a tenth SS set according to the at least one indicator; 15. The communication device of claim 14, comprising:

17. The instruction: Detecting a PDCCH for the second serving cell according to a predetermined SS set; When detecting a PDCCH for the second serving cell according to the at least one tenth SS set is stopped for the fourth period according to the at least one indicator, stopping detecting a PDCCH for the second serving cell according to the at least one tenth SS set except for the predetermined SS set; 17. The communication device of claim 16, comprising:

18. 17. The communications device of claim 16, wherein the communications device stops detecting a PDCCH for the second serving cell according to the at least one tenth SS set after the fourth period of time after receiving the at least one indicator.

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