Method and apparatus for determining control resource set

Abstract

This application relates to user equipment, a base station, and a method for determining a set of control resources. The base station transmits a configuration of a first set of control resources to the user equipment. The user equipment receives the configuration of the first set of control resources from the base station. The user equipment and the base station determine a second set of control resources based on the first set of control resources.

Description

Technical Field

[0001] This disclosure generally relates to determining a set of control resources, and more specifically to determining a set of control resources for a new radio device. Background Technology

[0002] In a conventional network, physical downlink control channel (PDCCH) detection can be performed between user equipment and base stations based on certain network resource configurations. These configurations may include control resource set configuration, search space set configuration, and demodulation reference symbol positions.

[0003] For some networks compatible with the New Radio (NR) protocol, NR devices with reduced capabilities (i.e., NR-Light devices) can be introduced. Since the capabilities of NR-Light devices may be limited, the configuration for PDCCH detection performed by the NR-Light devices needs to be reconfigured. However, specific details regarding the configuration for PDCCH detection performed by NR-Light devices have not been discussed, and some issues remain to be addressed. Summary of the Invention

[0004] One embodiment of this disclosure provides a user equipment method. The method includes: receiving a configuration of a first control resource set (CORESET) from a base station; and determining a second CORESET based on the first CORESET, wherein an initial physical resource block (PRB) of the second CORESET is allocated as an initial PRB of a control channel element (CCE) of the first CORESET.

[0005] Another embodiment of this disclosure provides a base station method. The method includes: transmitting the configuration of a first core set to a user equipment; and determining a second core set based on the first core set, wherein the initial PRB of the second core set is assigned as the initial PRB of the CCE of the first core set.

[0006] Another embodiment of this disclosure provides an apparatus. According to an embodiment of this disclosure, the apparatus includes: at least one non-transitory computer-readable medium storing computer-executable instructions; at least one receiving circuitry system; at least one transmitting circuitry system; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry system, and the at least one transmitting circuitry system, wherein the at least one non-transitory computer-readable medium and the computer-executable instructions are configured to cause the apparatus to perform a method according to an embodiment of this disclosure via the at least one processor. Attached Figure Description

[0007] To illustrate the advantages and features of this disclosure, a description of the disclosure is presented with reference to specific embodiments thereof, which are illustrated in the accompanying drawings. These drawings depict only exemplary embodiments of the disclosure and should therefore not be construed as limiting the scope of the disclosure.

[0008] Figure 1 The diagram illustrates a wireless communication system according to an embodiment of the present disclosure.

[0009] Figure 2A The diagram illustrates the configuration of transmission in a wireless communication system according to an embodiment of the present disclosure.

[0010] Figures 2B to 2I This is a schematic diagram of a CORESET according to an embodiment of the present disclosure.

[0011] Figures 3A to 3B This is a schematic diagram of a CORESET according to an embodiment of the present disclosure.

[0012] Figure 4 This is a schematic diagram of a CORESET according to an embodiment of the present disclosure.

[0013] Figures 5A to 5B This is a schematic diagram of a CORESET according to an embodiment of the present disclosure.

[0014] Figure 6 This is a schematic diagram of a CORESET according to an embodiment of the present disclosure.

[0015] Figure 7 This is a schematic diagram of a CORESET according to an embodiment of the present disclosure.

[0016] Figure 8 The diagram illustrates a flowchart of a method for wireless communication according to an embodiment of the present disclosure.

[0017] Figure 9 The illustrations are example block diagrams illustrating an apparatus according to embodiments of the present disclosure. Detailed Implementation

[0018] The detailed description of the accompanying drawings is intended to illustrate preferred embodiments of the present disclosure and is not intended to represent the only form in which the present disclosure may be practiced. It should be understood that the same or equivalent functionality may be achieved through different embodiments intended to be covered within the spirit and scope of the present disclosure.

[0019] refer to Figure 1 The wireless communication system 100 may include a user equipment (UE) 101, a base station (BS) 102, and a core network (CN) 103. Although Figure 1The diagram depicts a specific number of UEs 101, BS 102, and CN 103, but please consider that the wireless communication system 100 may contain any number of UEs 101, BS 102, and CN 103.

[0020] CN 103 may include a Core Access and Mobility Management Function (AMF) entity. BS 102, which can communicate with CN 103, may operate or function under the control of the AMF entity. CN 103 may further include a User Plane Function (UPF) entity communicatively coupled to the AMF entity.

[0021] BS 102 can be distributed across geographical areas. In specific embodiments of this application, BS 102 may also be referred to as an access point, access terminal, base, base unit, macro cell, node B, evolved Node B (eNB), gNB, home node B, relay node, or device, or described using other terms used in this art. BS 102 is typically part of a radio access network that may contain one or more controllers communicatively coupled to one or more corresponding BSs.

[0022] UE 101 may include, but is not limited to, computing devices such as desktop computers, laptop computers, personal digital assistants (PDAs), tablet computers, smart TVs (e.g., TVs connected to the Internet), set-top boxes, game consoles, security systems (including security cameras), onboard computers for vehicles, network devices (e.g., routers, switches, and modems), Internet of Things (IoT) devices, and so on.

[0023] According to some embodiments of this application, UE 101 may include, for example, but not limited to, a portable wireless communication device, a smartphone, a cellular phone, a flip phone, a device with a subscriber identification module, a personal computer, a selective call receiver, or any other device capable of transmitting and receiving communication signals on a wireless network.

[0024] In some embodiments of this application, UE 101 may include, for example, but not limited to, wearable devices, such as smartwatches, fitness bands, optical head-mounted displays, etc. Furthermore, UE 101 may be referred to as a subscriber unit, mobile device, mobile station, user, terminal, mobile terminal, wireless terminal, fixed terminal, subscriber station, user terminal, or device, or described using other terms used in this art. UE 101 may communicate directly with BS 102 via uplink communication signals.

[0025] The wireless communication system 100 is compatible with any type of network capable of transmitting and receiving wireless communication signals. For example, the wireless communication system 100 is compatible with the following networks: wireless communication networks, cellular telephone networks, time division multiple access (TDMA) based networks, code division multiple access (CDMA) based networks, orthogonal frequency division multiple access (OFDMA) based networks, long-term evolution (LTE) networks, 3GPP based networks, 3GPP 5G networks, satellite communication networks, high-altitude platform networks, and / or other communication networks.

[0026] In some embodiments of this application, the wireless communication system 100 may be compatible with 5G New Radio (NR) or 5G Light NR according to the 3GPP protocol, wherein the BS 102 transmits data using an OFDM modulation scheme on the downlink (DL) and the UE 101 transmits data using a single-carrier frequency division multiple access (SC-FDMA) or OFDM scheme on the uplink (UL). However, more generally, the wireless communication system 100 may implement other open or proprietary communication protocols, such as WiMAX and other protocols.

[0027] In some embodiments of this application, BS 102 may communicate using other communication protocols (e.g., the IEEE 802.11 family of wireless communication protocols). Furthermore, in some embodiments of this application, BS 102 may communicate via licensed spectrum, while in other embodiments, BS 102 may communicate via unlicensed spectrum. This application is not intended to be limited to any particular wireless communication system architecture or protocol implementation. In other embodiments of this application, BS 102 may communicate with UE 101 using the 3GPP 5G protocol.

[0028] According to some existing conventions, UE 101 and BS 102 included in wireless communication system 100 are compatible with 3GPP Light NR. However, since the capabilities of Light NR UE 101 may be limited, the configuration for performing Physical Downlink Control Channel (PDCCH) detection by UE 101 and BS 102 needs to be reconfigured.

[0029] In some embodiments, the general configuration of the control resource set (CORESET) can be used for UE 101 and BS 102 to determine an appropriate alternative configuration of the CORESET for the light NR protocol. Specifically, refer to... Figure 2A BS 102 can broadcast a Master Information Block (MIB) 102A containing the configuration of the first CORESET CT1. Then, UE 101 can receive the MIB 102A containing the configuration of the first CORESET CT1 by detecting the Synchronization Signal Block (SSB).

[0030] Next, UE 101 can retrieve the configuration of the first CORESET CT1 from MIB 102A. UE 101 and BS 102 can then determine the first CORESET CT1 respectively based on the configuration. For details, please refer to... Figure 2B The configuration of the first CORESET CT1 may include the frequency domain size and time domain size used to define the first CORESET CT1.

[0031] In some implementations, the first CORESET CT1 may be included in CORESET zero (i.e., CORESET0) as specified in 3GPP Technical Specification #38.213 (the entire contents of which are incorporated herein by reference), and the frequency domain size and time domain size used to define the first CORESET CT1 may be selected from:

[0032] (1) 24 physical resource blocks (PRBs) in the frequency domain and 2 orthogonal frequency division multiplexing (OFDM) symbols in the time domain;

[0033] (2) 24 PRBs in the frequency domain and 3 OFDM symbols in the time domain;

[0034] (3) 48 PRBs in the frequency domain and 1 OFDM symbol in the time domain;

[0035] (4) 48 PRBs in the frequency domain and 2 OFDM symbols in the time domain;

[0036] (5) 48 PRBs in the frequency domain and 3 OFDM symbols in the time domain;

[0037] (6) 96 PRBs in the frequency domain and 1 OFDM symbol in the time domain;

[0038] (7) 96 PRBs in the frequency domain and 2 OFDM symbols in the time domain; or

[0039] (8) 96 PRBs in the frequency domain and 3 OFDM symbols in the time domain.

[0040] Please refer to Figure 2CAfter determining the first CORESET CT1 based on the selected frequency domain size and time domain size, UE101 / BS102 can determine the second CORESET CT2 according to the first CORESET CT1. Specifically, in the frequency domain, UE101 / BS102 can assign the initial PRB P2 of the second CORESET CT2 to the initial PRB P1 of the first CORESET CT1. Specifically, the initial PRB P2 of the second CORESET CT2 can be assigned to the initial PRB P1 of a specific control channel element (CCE) C1 of the first CORESET CT1. In some embodiments, when the first CORESET CT1 contains CORESET0, the specific CCE C1 of the first CORESET CT1 can contain CCE zero (CCE0) or CCE one (CCE1) of CORESET0.

[0041] More specifically, when UE 101 / BS 102 determines that the predefined frequency domain size of the second CORESET CT2 is smaller than the frequency domain size of the first CORESET CT1, UE 101 / BS 102 then determines whether the initial PRB of the second CORESET CT2 should be allocated as the initial PRB of CCE0 of CORESET0 or as the initial PRB of CCE1 of CORESET0. It should be noted that the predefined frequency domain size of the second CORESET CT2 may be a default setting stored in UE 101 / BS 102, or the predefined frequency domain size of the second CORESET CT2 may be determined by BS 102 and included in the configuration of the first CORESET CT1. In some embodiments, the size of the second CORESET CT2 in the time domain and / or frequency domain may be determined by the configuration of the first CORESET CT1.

[0042] Please refer to Figure 2D When the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of the CCE0 of CORESET0, if it is determined that the frequency band of the second CORESET CT2 is within the frequency band of CORESET0, then UE 101 / BS 102 determines to assign the initial PRB P2 of the second CORESET CT2 to the initial PRB P1 of the CCE0 of CORESET0.

[0043] Please refer to Figures 2E to 2F .like Figure 2EAs shown, when the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0, if it is determined that the frequency band of the second CORESET CT2 is not within the frequency band of CORESET0 (e.g., partially overlapping), then UE 101 / BS 102 determines to assign the initial PRB P2 of the second CORESET CT2 to the initial PRB P1 of CCE1 of CORESET0, as follows. Figure 2F As shown in the image.

[0044] Please refer to Figure 2G Similarly, when the initial PRB P2 of the second CORESET CT2 is assigned as the initial PRB P1 of the CCE1 of CORESET0, if it is determined that the frequency band of the second CORESET CT2 is within the frequency band of CORESET0, then UE 101 / BS102 determines to assign the initial PRB P2 of the second CORESET CT2 as the initial PRB P1 of the CCE1 of CORESET0.

[0045] Please refer to Figure 2H to 2I .like Figure 2H As shown, when the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE1 of CORESET0, if it is determined that the frequency band of the second CORESET CT2 is not within the frequency band of CORESET0 (e.g., partially overlapping), then UE 101 / BS 102 determines to assign the initial PRB P2 of the second CORESET CT2 to the initial PRB P1 of CCE0 of CORESET0, as follows. Figure 2I As shown in the image.

[0046] Furthermore, in the time domain, UE 101 / BS 102 can determine at least one resource unit of the second CORESET CT2 based on a predefined time domain size. It should be noted that the predefined time domain size of the second CORESET CT2 can be a default setting stored in UE 101 / BS 102, or the predefined time domain size of the second CORESET CT2 can be determined by BS 102 and included in the configuration of the first CORESET CT1.

[0047] In some implementations, each resource unit of the second CORESET CT2 may contain at least one OFDM symbol. The number of OFDM symbols per resource unit may be the same as the number of OFDM symbols in the first CORESET CT1. For example, please refer to... Figure 3AWhen the first CORESET CT1 contains CORESET0 and the time domain size is selected as 2 OFDM symbols, the number of OFDM symbols per resource unit is configured as 2 OFDM symbols.

[0048] In some implementations, each of the first "N-1" resource units of the second CORESET CT2 may contain at least one OFDM symbol, and the number of OFDM symbols in each of the first "N-1" resource units may be the same as the number of OFDM symbols in the first CORESET CT1. The Nth resource unit of the second CORESET CT2 may contain at least one OFDM symbol, and the number of OFDM symbols in the Nth resource unit may be configured to be less than the number of OFDM symbols in the first CORESET CT1.

[0049] For example, please refer to Figure 3B When the first CORESET CT1 contains CORESET0, the time domain size is selected as 3 OFDM symbols, and the second CORESET CT2 contains 3 resource units, the number of OFDM symbols in each of the first two (i.e., "3-1=2") resource units is configured to be 3 OFDM symbols. The number of OFDM symbols in the third resource unit is configured to be less than 3 OFDM symbols (e.g., 2 OFDM symbols).

[0050] In some embodiments, within a resource unit of the second CORESET CT2 having the same time-domain duration (i.e., containing the same number of OFDM symbols) as the first CORESET CT1, a Resource Element Group Bundle (REGB) may contain multiple Resource Element Groups (REGs). In some embodiments, the number of REGs in a REGB of the second CORESET CT2 may be the same as the number of REGs in a REGB of the first CORESET CT1. For example, when the first CORESET CT1 contains CORESET0 and a REGB of CORESET0 contains six REGs, the number of REGs in a REGB of the second CORESET CT2 is also six.

[0051] In some embodiments, the REGB of the second CORESET CT2 may be: (1) sequentially indexed in each resource unit; and (2) sequentially indexed from one resource unit to another.

[0052] In some implementations where the number of OFDM symbols per resource unit is configured to be the same as the number of OFDM symbols in the first CORESET CT1, the index of the REGB of the second CORESET CT2 may be configured according to the following rules:

[0053] - The REGB for resource unit "x" is indexed as: REGB{x*N_RegBundle_unit,x*N_RegBundle_unit+1,…,x*N_RegBundle_unit+N_RegBundle_unit-1}, where N_RegBundle_unit represents the number of REGBs per resource unit.

[0054] For example, when there are two resource units "0" and "1" in the second CORESET CT2 and N_RegBundle_unit is 8:

[0055] - The REGB for resource unit "0" is indexed as: REGB(0*8), REGB(0*8+1), REGB(0*8+2), REGB(0*8+3), REGB(0*8+4), REGB(0*8+5), REGB(0*8+6), and REGB(0*8+7). That is, the REGB for resource unit "0" is indexed as: REGB0, REGB1, REGB2, REGB3, REGB4, REGB5, REGB6, and REGB7.

[0056] - The REGB of resource unit "1" is indexed as: REGB(1*8), REGB(1*8+1), REGB(1*8+2), REGB(1*8+3), REGB(1*8+4), REGB(1*8+5), REGB(1*8+6) and REGB(1*8+7), that is, the REGB of resource unit "1" is indexed as: REGB8, REGB9, REGB10, REGB11, REGB12, REGB13, REGB14 and REGB15.

[0057] In some implementations where (1) the number of OFDM symbols in each of the first “N-1” resource units is configured to be the same as the number of OFDM symbols in the first CORESETCT1 and (2) the number of OFDM symbols in the Nth resource unit is configured to be less than the number of OFDM symbols in the first CORESETCT1, the index of the REGB of the second CORESETCT2 may be configured according to the following rules:

[0058] The REGBs for the first N-1 resource units "x" are indexed as: REGB{x*N_RegBundle_unit,x*N_RegBundle_unit+1,…,x*N_RegBundle_unit+N_RegBundle_unit-1}, where N_RegBundle_unit represents the number of REGBs per resource unit; and

[0059] - The REGB of the Nth resource unit "y" is indexed as: {y*N_RegBundle_unit+N_RegBundle_unit,y*N_RegBundle_unit+N_RegBundle_unit+1,…,N_RegBundle}, where N_RegBundle represents the number of REGBs in the second CORESET CT2.

[0060] For example, when there are three resource units "0", "1" and "2" in the second CORESET CT2, and N_RegBundle_unit is 8 and N_RegBundle is 20:

[0061] - The REGB of resource unit "0" is indexed as: REGB(0*8), REGB(0*8+1), REGB(0*8+2), REGB(0*8+3), REGB(0*8+4), REGB(0*8+5), REGB(0*8+6) and REGB(0*8+7), that is, the REGB of resource unit "0" is indexed as: REGB0, REGB1, REGB2, REGB3, REGB4, REGB5, REGB6 and REGB7;

[0062] - The REGB of resource unit "1" is indexed as: REGB(1*8), REGB(1*8+1), REGB(1*8+2), REGB(1*8+3), REGB(1*8+4), REGB(1*8+5), REGB(1*8+6), and REGB(1*8+7), that is, the REGB of resource unit "1" is indexed as: REGB8, REGB9, REGB10, REGB11, REGB12, REGB13, REGB14, and REGB15; and

[0063] - The REGB of resource unit "2" is indexed as: REGB(2*8), REGB(2*8+1), REGB(2*8+2) and REGB(2*8+3), that is, the REGB of resource unit "2" is indexed as: REGB16, REGB17, REGB18 and REGB19.

[0064] In some embodiments, when the first CORESET CT1 contains CORESET0, the mapping relationship from CCE to REGB of the first CORESET CT1 can be defined according to the following rules:

[0065] -when At that time, CORESET0's CCE0 is mapped to REGB "X", where nshift Indicates offset, L represents the number of REGs in CORESET0, and L represents the number of REGs in a REGB.

[0066] - When the number of REGBs in CORESET0 is K and the interleaver size is R:

[0067] -CCE "R*i" is mapped to REGB "X+i", i = 0, 1, 2, ..., (K / 2)-1, where if "X+i" is greater than "K-1", then the CCE numbering continues from REGB0 in a wraparound manner;

[0068] -CCE "R*i+1" is mapped to REGB "X+i+K / 2", i = 0, 1, 2, ..., (K / 2)-1, where if "X+i+K / 2" is greater than "K-1", then the CCE numbering continues from REGB0 in a wraparound manner.

[0069] In some embodiments, when the frequency band of the first CORESET CT1 is greater than the frequency band of the second CORESET CT2, the CCE-to-REG mapping relationship of the second CORESET CT2 can be redefined. Specifically, when the first CORESET CT1 contains CORESET0 and the initial PRB of the second CORESET CT2 is assigned as the initial PRB of CCE0 of CORESET0, the CCE-to-REG mapping relationship of the second CORESET CT2 can be defined according to the following rules.

[0070] -when At that time, CORESET0's CCE0 is mapped to REGB "X", where n shift =0, and L represents the number of REGs in CORESET0, and L represents the number of REGs in a REGB.

[0071] - When the number of REGBs in CORESET0 is K and the interleaver size is R:

[0072] -CCE "R*i" is mapped to REGB "X+i", i = 0, 1, 2, ..., (K / 2)-1, where if "X+i" is greater than "K-1", then the CCE numbering continues from REGB0 in a wraparound manner;

[0073] -CCE "R*i+1" is mapped to REGB "X+i+K / 2", i = 0, 1, 2, ..., (K / 2)-1, where if "X+i+K / 2" is greater than "K-1", then the CCE numbering continues from REGB0 in a wraparound manner.

[0074] When the first CORESET CT1 contains CORESET0 and the initial PRB of the second CORESET CT2 is assigned as the initial PRB of CCE1 of CORESET0, the mapping relationship from CCE to REG of the second CORESET CT2 can be defined according to the following rules.

[0075] -when At that time, CORESET0's CCE0 is mapped to REGB "X", where n shift = N_RegBundle / 2, where N_RegBundle represents the number of REGBs in CORESET0. L represents the number of REGs in CORESET0, and L represents the number of REGs in a REGB.

[0076] - When the number of REGBs in CORESET0 is K and the interleaver size is R:

[0077] -CCE "R*i" is mapped to REGB "X+i", i = 0, 1, 2, ..., (K / 2)-1, where if "X+i" is greater than "K-1", then the CCE numbering continues from REGB0 in a wraparound manner;

[0078] -CCE "R*i+1" is mapped to REGB "X+i+K / 2", i = 0, 1, 2, ..., (K / 2)-1, where if "X+i+K / 2" is greater than "K-1", then the CCE numbering continues from REGB0 in a wraparound manner.

[0079] In some embodiments, BS 102 may further transmit the configuration of the first CORESET CT1 together with the first search space set. The first search space set corresponds to the first aggregation level set. In some embodiments, when the first CORESET CT1 includes CORESET0, the configuration of the first CORESET CT1 may be associated with search space zero as specified in 3GPP specification #38.213, and the first aggregation level set may include aggregation levels 4, 8, and 16, respectively, corresponding to the number of CCE candidates 4, 2, and 1.

[0080] Next, UE 101 may receive the configuration of the first CORESET CT1 and the first search space set. UE 101 / BS102 may determine the second aggregation level set of the second search space set of the second CORESET CT2. In some implementations, the aggregation level in the second set may be equal to or higher than the aggregation level in the first aggregation level set.

[0081] For some implementations of determining the second CORESET CT2 based on the first CORRESET CT1 containing CORESET0, please refer to [link to relevant documentation]. Figure 4 Specifically, after UE 101 receives the MIB information containing the configuration of CORESET0 from BS 102, UE 101 can retrieve the following information from the configuration: (1) the frequency domain size of CORESET0 contains 48 PRBs; and (2) the time domain size of CORESET0 contains 2 OFDM symbols. Then, UE 101 / BS 102 determine the second CORESETCT2 according to the following: (1) the configuration of CORESET0; (2) the predefined frequency domain size of the second CORESET CT2 containing 24 PRBs; and (3) the predefined time domain size of the second CORESET CT2 containing 4 OFDM symbols of 2 resource units.

[0082] Specifically, regarding CORESET0,n of these implementation schemes shift Configured to 5, The configuration is 48*2=96 and L is configured as 6, meaning that one REGB contains 6 REGs, such as... Figure 4 As shown in the diagram. Therefore, CCE0 of CORESET0 is mapped to REGB5. Furthermore, the mapping relationship from CCE to REG for CORESET0 is defined as follows:

[0083] -CCE0(C0, such as Figure 4 (As shown in the image) mapped to REGB5 (R5, such as...) Figure 4 (as shown in the image)

[0084] -CCE2(C2, such as Figure 4 (As shown in the image) mapped to REGB6 (R6, such as...) Figure 4 (as shown in the image)

[0085] -CCE4(C4, such as Figure 4 (As shown in the image) mapped to REGB7 (R7, such as...) Figure 4 (as shown in the image)

[0086] -CCE6(C6, such as) Figure 4 (As shown in the image) mapped to REGB8 (R8, such as...) Figure 4 (as shown in the image)

[0087] -CCE8(C8, such as) Figure 4 (As shown in the image) mapped to REGB9 (R9, such as...) Figure 4 (as shown in the image)

[0088] -CCE10(C10, such as...) Figure 4 (As shown in the image) mapped to REGB10 (R10, such as...) Figure 4 (as shown in the image)

[0089] -CCE12(C12, such as Figure 4 (As shown in the image) mapped to REGB11 (R11, such as...) Figure 4 (as shown in the image)

[0090] -CCE14(C14, such as...) Figure 4 (As shown in the image) mapped to REGB12 (R12, such as...) Figure 4 (as shown in the image)

[0091] -CCE1(C1, such as Figure 4 (As shown in the image) mapped to REGB13 (R13, such as...) Figure 4 (as shown in the image)

[0092] -CCE3(C3, such as Figure 4 (As shown in the image) mapped to REGB14 (R14, such as...) Figure 4 (as shown in the image)

[0093] -CCE5(C5, such as) Figure 4 (As shown in the image) mapped to REGB15 (R15, such as...) Figure 4 (as shown in the image)

[0094] -CCE7(C7, such as) Figure 4 (As shown in the image) is mapped to REGB0(R0, such as...) Figure 4 (as shown in the image)

[0095] -CCE9(C9, such as) Figure 4 (As shown in the image) mapped to REGB1(R1, such as...) Figure 4 (as shown in the image)

[0096] -CCE11(C11, such as...) Figure 4 (As shown in the image) mapped to REGB2 (R2, such as...) Figure 4 (as shown in the image)

[0097] -CCE13(C13, such as...) Figure 4 (As shown in the image) mapped to REGB3 (R3, such as...) Figure 4 (as shown in the image)

[0098] -CCE15(C15, such as...) Figure 4 (As shown in the image) mapped to REGB4 (R4, such as...) Figure 4 (as shown in the image)

[0099] Therefore, regarding the second CORESET CT2: (1) in the time domain, UE 101 / BS 102 determines that the first OFDM symbol s0 of the second CORESET CT2 starts from the first OFDM symbol S0 of CORESET0; and (2) in the frequency domain, when the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0, since the frequency band of the second CORESET CT2 is within the frequency band of CORESET0, UE 101 / BS 102 determines that the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0.

[0100] Furthermore, the second CORESET CT2 comprises two resource units, RU0 and RU1. The number of OFDM symbols in each resource unit is the same as the number of OFDM symbols in CORESET0, which is 2 in these embodiments. Each resource unit contains 8 REGBs. Therefore, resource units RU0 and RU1 contain 16 REGBs. The REGBs of the second CORESET CT2 are: (1) sequentially indexed in each resource unit; and (2) sequentially indexed from one resource unit to another. Thus, the 16 REGBs are indexed as REGB0 to REGB15, as follows: Figure 4 As shown in the figure (i.e., r0 to r15, such as Figure 4 (As shown in the image).

[0101] Next, since the initial PRB P2 of the second CORESET CT2 is assigned as the initial PRBP1 of CCE0 of CORESET0, n shift The configuration is set to 0. Therefore, the mapping relationship from CCE to REG for the second CORESET CT2 is defined as follows:

[0102] -CCE0(c0, such as Figure 4 (As shown in the image) is mapped to REGB0(r0, such as...) Figure 4 (as shown in the image)

[0103] -CCE2(c2, as shown) Figure 4 (As shown in the image) is mapped to REGB1(r1, such as...) Figure 4 (as shown in the image)

[0104] -CCE4(c4, e.g.) Figure 4 (As shown in the image) is mapped to REGB2(r2, such as...) Figure 4 (as shown in the image)

[0105] -CCE6(c6, e.g.) Figure 4 (As shown in the image) mapped to REGB3(r3, such as...) Figure 4 (as shown in the image)

[0106] -CCE8(c8, as shown) Figure 4 (As shown in the image) mapped to REGB4(r4, such as...) Figure 4 (as shown in the image)

[0107] -CCE10(c10, such as) Figure 4 (As shown in the image) mapped to REGB5(r5, such as...) Figure 4 (as shown in the image)

[0108] -CCE12(c12, such as) Figure 4 (As shown in the image) mapped to REGB6(r6, such as...) Figure 4 (as shown in the image)

[0109] -CCE14(c14, such as...) Figure 4 (As shown in the image) mapped to REGB7 (r7, such as...) Figure 4 (as shown in the image)

[0110] -CCE1(c1, as shown) Figure 4 (As shown in the image) mapped to REGB8 (r8, such as...) Figure 4 (as shown in the image)

[0111] -CCE3(c3, such as) Figure 4 (As shown in the image) mapped to REGB9(r9, such as...) Figure 4 (as shown in the image)

[0112] -CCE5(c5, as shown) Figure 4 (As shown in the image) mapped to REGB10 (r10, such as...) Figure 4 (as shown in the image)

[0113] -CCE7(c7, e.g.) Figure 4 (As shown in the image) mapped to REGB11(r11, such as...) Figure 4 (as shown in the image)

[0114] -CCE9(c9, such as) Figure 4 (As shown in the image) mapped to REGB12(r12, such as...) Figure 4 (as shown in the image)

[0115] -CCE11(c11, as shown) Figure 4 (As shown in the image) mapped to REGB13(r13, such as...) Figure 4 (as shown in the image)

[0116] -CCE13(c13, such as) Figure 4 (As shown in the image) mapped to REGB14(r14, such as...) Figure 4 (as shown in the image)

[0117] -CCE15(c15, such as) Figure 4 (As shown in the image) mapped to REGB15 (r15, such as...) Figure 4 (as shown in the image)

[0118] In these implementations, a first search space set corresponding to the first aggregation level set is assigned to CORESET0. Specifically, since CORESET0 contains 16 REGBs, the first aggregation level set supports a maximum of aggregation level 16 (i.e., the first aggregation level set supports aggregation levels 4, 8, and 16). Therefore, since the aggregation levels in the second aggregation level set should be equal to or higher than the aggregation levels in the first aggregation level set, UE 101 determines that the maximum aggregation level of the second search space set for the second CORESET CT2 is 16. The CCE index of each candidate for each aggregation level in the second aggregation level set is listed in the following table:

[0119]

[0120]

[0121] For some implementations of determining the second CORESET CT2 based on the first CORRESET CT1 containing CORESET0, please refer to [link to relevant documentation]. Figure 5A Specifically, after UE 101 receives the MIB information containing the configuration of CORESET0 from BS 102, UE 101 can retrieve the following information from the configuration: (1) the frequency domain size of CORESET0 contains 48 PRBs; and (2) the time domain size of CORESET0 contains 2 OFDM symbols. Then, UE 101 / BS 102 determine the second CORESETCT2 according to the following: (1) the configuration of CORESET0; (2) the predefined frequency domain size of the second CORESET CT2 containing 24 PRBs; and (3) the predefined time domain size of the second CORESET CT2 containing 4 OFDM symbols of 2 resource units.

[0122] Specifically, regarding CORESET0,n of these implementation schemes shift Configured to 12, The configuration is 48*2=96, and L is configured as 6. Therefore, CCE0 of CORESET0 is mapped to REGB12. Furthermore, the mapping relationship from CCE to REG in CORESET0 is defined as follows:

[0123] -CCE0(C0, such as Figure 5A (As shown in the image) mapped to REGB12 (R12, such as...) Figure 5A (as shown in the image)

[0124] -CCE2(C2, such as Figure 5A(As shown in the image) mapped to REGB13 (R13, such as...) Figure 5A (as shown in the image)

[0125] -CCE4(C4, such as Figure 5A (As shown in the image) mapped to REGB14 (R14, such as...) Figure 5A (as shown in the image)

[0126] -CCE6(C6, such as) Figure 5A (As shown in the image) mapped to REGB15 (R15, such as...) Figure 5A (as shown in the image)

[0127] -CCE8(C8, such as) Figure 5A (As shown in the image) is mapped to REGB0(R0, such as...) Figure 5A (as shown in the image)

[0128] -CCE10(C10, such as...) Figure 5A (As shown in the image) mapped to REGB1(R1, such as...) Figure 5A (as shown in the image)

[0129] -CCE12(C12, such as Figure 5A (As shown in the image) mapped to REGB2 (R2, such as...) Figure 5A (as shown in the image)

[0130] -CCE14(C14, such as...) Figure 5A (As shown in the image) mapped to REGB3 (R3, such as...) Figure 5A (as shown in the image)

[0131] -CCE1(C1, such as Figure 5A (As shown in the image) mapped to REGB4 (R4, such as...) Figure 5A (as shown in the image)

[0132] -CCE3(C3, such as Figure 5A (As shown in the image) mapped to REGB5 (R5, such as...) Figure 5A (as shown in the image)

[0133] -CCE5(C5, such as) Figure 5A (As shown in the image) mapped to REGB6 (R6, such as...) Figure 5A (as shown in the image)

[0134] -CCE7(C7, such as) Figure 5A (As shown in the image) mapped to REGB7 (R7, such as...) Figure 5A (as shown in the image)

[0135] -CCE9(C9, such as) Figure 5A (As shown in the image) mapped to REGB8 (R8, such as...) Figure 5A (as shown in the image)

[0136] -CCE11(C11, such as...) Figure 5A (As shown in the image) mapped to REGB9 (R9, such as...) Figure 5A (as shown in the image)

[0137] -CCE13(C13, such as...) Figure 5A (As shown in the image) mapped to REGB10 (R10, such as...) Figure 5A (as shown in the image)

[0138] -CCE15(C15, such as...) Figure 5A (As shown in the image) mapped to REGB11 (R11, such as...) Figure 5A (as shown in the image)

[0139] Therefore, regarding the second CORESET CT2: (1) in the time domain, UE 101 determines that the first OFDM symbol s0 of the second CORESET CT2 starts from the first OFDM symbol S0 of CORESET0; and (2) in the frequency domain, when the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0, since the frequency band of the second CORESET CT2 is not within the frequency band of CORESET0 (i.e., partially overlapping), UE 101 determines that the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE1 of CORESET0, as follows. Figure 5B As shown in the image.

[0140] Furthermore, the second CORESET CT2 comprises two resource units, RU0 and RU1. The number of OFDM symbols in each resource unit is the same as the number of OFDM symbols in CORESET0, which is 2 in these embodiments. Each resource unit contains 8 REGBs. Therefore, resource units RU0 and RU1 contain 16 REGBs. The REGBs of the second CORESET CT2 are: (1) sequentially indexed in each resource unit; and (2) sequentially indexed from one resource unit to another. Thus, the 16 REGBs are indexed as REGB0 to REGB15, as follows: Figure 5B As shown in the figure (r0 to r15, such as Figure 5B (As shown in the image).

[0141] Next, since the initial PRB P2 of the second CORESET CT2 is assigned as the initial PRBP1 of CCE1 of CORESET0, n shift The configuration is N_RegBundle / 2, which is 16 / 2 = 8. Therefore, the mapping relationship from CCE to REG for the second CORESET CT2 is defined as follows:

[0142] -CCE1(c1, as shown) Figure 5B (As shown in the image) is mapped to REGB0(r0, such as...) Figure 5B (as shown in the image)

[0143] -CCE3(c3, such as) Figure 5B (As shown in the image) is mapped to REGB1(r1, such as...) Figure 5B (as shown in the image)

[0144] -CCE5(c5, as shown) Figure 5B (As shown in the image) is mapped to REGB2(r2, such as...) Figure 5B (as shown in the image)

[0145] -CCE7(c7, e.g.) Figure 5B (As shown in the image) mapped to REGB3(r3, such as...) Figure 5B (as shown in the image)

[0146] -CCE9(c9, as shown) Figure 5B (As shown in the image) mapped to REGB4(r4, such as...) Figure 5B (as shown in the image)

[0147] -CCE11(c11, as shown) Figure 5B (As shown in the image) mapped to REGB5(r5, such as...) Figure 5B (as shown in the image)

[0148] -CCE13(c13, such as) Figure 5B (As shown in the image) mapped to REGB6(r6, such as...) Figure 5B (as shown in the image)

[0149] -CCE15(c15, such as) Figure 5B (As shown in the image) mapped to REGB7 (r7, such as...) Figure 5B (as shown in the image)

[0150] -CCE0(c0, as shown) Figure 5B (As shown in the image) mapped to REGB8 (r8, such as...) Figure 5B (as shown in the image)

[0151] -CCE2(c2, as shown) Figure 5B (As shown in the image) mapped to REGB9(r9, such as...) Figure 5B (as shown in the image)

[0152] -CCE4(c4, e.g.) Figure 5B (As shown in the image) mapped to REGB10 (r10, such as...) Figure 5B (as shown in the image)

[0153] -CCE6(c6, e.g.) Figure 5B (As shown in the image) mapped to REGB11(r11, such as...) Figure 5B(as shown in the image)

[0154] -CCE8(c8, as shown) Figure 5B (As shown in the image) mapped to REGB12(r12, such as...) Figure 5B (as shown in the image)

[0155] -CCE10(c10, such as) Figure 5B (As shown in the image) mapped to REGB13(r13, such as...) Figure 5B (as shown in the image)

[0156] -CCE12(c12, such as) Figure 5B (As shown in the image) mapped to REGB14(r14, such as...) Figure 5B (as shown in the image)

[0157] -CCE14(c14, such as...) Figure 5B (As shown in the image) mapped to REGB15 (r15, such as...) Figure 5B (as shown in the image)

[0158] In these implementations, a first search space set corresponding to the first aggregation level set is assigned to CORESET0. Specifically, since CORESET0 contains 16 REGBs, the first aggregation level set supports a maximum of aggregation level 16 (i.e., the first aggregation level set supports aggregation levels 4, 8, and 16). Therefore, since the aggregation levels in the second aggregation level set should be equal to or higher than the aggregation levels in the first aggregation level set, UE 101 determines that the maximum aggregation level of the second search space set for the second CORESET CT2 is 16. The CCE index of each candidate for each aggregation level in the second aggregation level set is listed in the following table:

[0159]

[0160] For some implementations of determining the second CORESET CT2 based on the first CORRESET CT1 containing CORESET0, please refer to [link to relevant documentation]. Figure 6 Specifically, after UE 101 receives the MIB information containing the configuration of CORESET0 from BS 102, UE 101 can retrieve the following information from the configuration: (1) the frequency domain size of CORESET0 contains 48 PRBs; and (2) the time domain size of CORESET0 contains 3 OFDM symbols. Then, UE 101 / BS 102 determine the second CORESETCT2 according to the following: (1) the configuration of CORESET0; (2) the predefined frequency domain size of the second CORESET CT2 containing 24 PRBs; and (3) the predefined time domain size of the second CORESET CT2 containing 4 OFDM symbols with 2 resource units.

[0161] Specifically, regarding CORESET0,n of these implementation schemes shift Configured to 8, The configuration is 48*3=144, and L is configured as 6, meaning one REGB contains 6 REGs. Therefore, CCE0 of CORESET0 is mapped to REGB8. Thus, the mapping relationship from CCE to REG in CORESET0 is defined as follows:

[0162] -CCE0(C0, such as Figure 6 (As shown in the image) mapped to REGB8 (R8, such as...) Figure 6 (as shown in the image)

[0163] -CCE2(C2, such as Figure 6 (As shown in the image) mapped to REGB9 (R9, such as...) Figure 6 (as shown in the image)

[0164] -CCE4(C4, such as Figure 6 (As shown in the image) mapped to REGB10 (R10, such as...) Figure 6 (as shown in the image)

[0165] -CCE6(C6, such as) Figure 6 (As shown in the image) mapped to REGB11 (R11, such as...) Figure 6 (as shown in the image)

[0166] -CCE8(C8, such as) Figure 6 (As shown in the image) mapped to REGB12 (R12, such as...) Figure 6 (as shown in the image)

[0167] -CCE10(C10, such as...) Figure 6 (As shown in the image) mapped to REGB13 (R13, such as...) Figure 6 (as shown in the image)

[0168] -CCE12(C12, such as Figure 6 (As shown in the image) mapped to REGB14 (R14, such as...) Figure 6 (as shown in the image)

[0169] -CCE14(C14, such as...) Figure 6 (As shown in the image) mapped to REGB15 (R15, such as...) Figure 6 (as shown in the image)

[0170] -CCE16(C16, such as...) Figure 6 (As shown in the image) mapped to REGB16 (R16, such as...) Figure 6 (as shown in the image)

[0171] -CCE18(C18, such as...) Figure 6(As shown in the image) mapped to REGB17 (R17, such as...) Figure 6 (as shown in the image)

[0172] -CCE20(C20, such as) Figure 6 (As shown in the image) mapped to REGB18 (R18, such as...) Figure 6 (as shown in the image)

[0173] -CCE22(C22, such as Figure 6 (As shown in the image) mapped to REGB19 (R19, such as...) Figure 6 (as shown in the image)

[0174] -CCE1(C1, such as Figure 6 (As shown in the image) mapped to REGB20 (R20, such as...) Figure 6 (as shown in the image)

[0175] -CCE3(C3, such as Figure 6 (As shown in the image) mapped to REGB21 (R21, such as...) Figure 6 (as shown in the image)

[0176] -CCE5(C5, such as) Figure 6 (As shown in the image) mapped to REGB22 (R22, such as...) Figure 6 (as shown in the image)

[0177] -CCE7(C7, such as) Figure 6 (As shown in the image) mapped to REGB23 (R23, such as...) Figure 6 (as shown in the image)

[0178] -CCE9(C9, such as) Figure 6 (As shown in the image) is mapped to REGB0(R0, such as...) Figure 6 (as shown in the image)

[0179] -CCE11(C11, such as...) Figure 6 (As shown in the image) mapped to REGB1(R1, such as...) Figure 6 (as shown in the image)

[0180] -CCE13(C13, such as...) Figure 6 (As shown in the image) mapped to REGB2 (R2, such as...) Figure 6 (as shown in the image)

[0181] -CCE15(C15, such as...) Figure 6 (As shown in the image) mapped to REGB3 (R3, such as...) Figure 6 (as shown in the image)

[0182] -CCE17(C17, such as...) Figure 6 (As shown in the image) mapped to REGB4 (R4, such as...) Figure 6 (as shown in the image)

[0183] -CCE19(C19, such as...) Figure 6 (As shown in the image) mapped to REGB5 (R5, such as...) Figure 6 (as shown in the image)

[0184] -CCE21(C21, such as...) Figure 6 (As shown in the image) mapped to REGB6 (R6, such as...) Figure 6 (as shown in the image)

[0185] -CCE23(C23, such as...) Figure 6 (As shown in the image) mapped to REGB7 (R7, such as...) Figure 6 (as shown in the image)

[0186] Therefore, regarding the second CORESET CT2: (1) in the time domain, UE 101 determines that the first OFDM symbol s0 of the second CORESET CT2 starts from the first OFDM symbol S0 of CORESET0; and (2) in the frequency domain, when the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0, since the frequency band of the second CORESET CT2 is within the frequency band of CORESET0, UE 101 / BS 102 determines that the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0.

[0187] Furthermore, the second CORESET CT2 comprises two resource units RU0 and RU1. The number of OFDM symbols in the first resource unit RU0 is the same as the number of OFDM symbols in CORESET0, which is 3 in these embodiments. The first resource unit RU0 comprises 12 REGBs. In these embodiments, the number of OFDM symbols in the second resource unit RU1 is 1. The second resource unit RU1 comprises 4 REGBs. Therefore, resource units RU0 and RU1 comprise 16 REGBs. The REGBs of the second CORESET CT2 are: (1) sequentially indexed in each resource unit; and (2) sequentially indexed from one resource unit to another. Therefore, the 16 REGBs are indexed as REGB0 to REGB15 (r0 to r15, e.g., Figure 6 (As shown in the image).

[0188] Next, since the initial PRB P2 of the second CORESET CT2 is assigned as the initial PRBP1 of CCE0 of CORESET0, n shift The configuration is set to 0. Therefore, the mapping relationship from CCE to REG for the second CORESET CT2 is defined as follows:

[0189] -CCE0(c0, such as Figure 6 (As shown in the image) is mapped to REGB0(r0, such as...) Figure 6 (as shown in the image)

[0190] -CCE2(c2, as shown) Figure 6 (As shown in the image) is mapped to REGB1(r1, such as...) Figure 6 (as shown in the image)

[0191] -CCE4(c4, e.g.) Figure 6 (As shown in the image) is mapped to REGB2(r2, such as...) Figure 6 (as shown in the image)

[0192] -CCE6(c6, e.g.) Figure 6 (As shown in the image) mapped to REGB3(r3, such as...) Figure 6 (as shown in the image)

[0193] -CCE8(c8, as shown) Figure 6 (As shown in the image) mapped to REGB4(r4, such as...) Figure 6 (as shown in the image)

[0194] -CCE10(c10, such as) Figure 6 (As shown in the image) mapped to REGB5(r5, such as...) Figure 6 (as shown in the image)

[0195] -CCE12(c12, such as) Figure 6 (As shown in the image) mapped to REGB6(r6, such as...) Figure 6 (as shown in the image)

[0196] -CCE14(c14, such as...) Figure 6 (As shown in the image) mapped to REGB7 (r7, such as...) Figure 6 (as shown in the image)

[0197] -CCE1(c1, as shown) Figure 6 (As shown in the image) mapped to REGB8 (r8, such as...) Figure 6 (as shown in the image)

[0198] -CCE3(c3, such as) Figure 6 (As shown in the image) mapped to REGB9(r9, such as...) Figure 6 (as shown in the image)

[0199] -CCE5(c5, as shown) Figure 6 (As shown in the image) mapped to REGB10 (r10, such as...) Figure 6 (as shown in the image)

[0200] -CCE7(c7, e.g.) Figure 6 (As shown in the image) mapped to REGB11(r11, such as...) Figure 6(as shown in the image)

[0201] -CCE9(c9, as shown) Figure 6 (As shown in the image) mapped to REGB12(r12, such as...) Figure 6 (as shown in the image)

[0202] -CCE11(c11, as shown) Figure 6 (As shown in the image) mapped to REGB13(r13, such as...) Figure 6 (as shown in the image)

[0203] -CCE13(c13, such as) Figure 6 (As shown in the image) mapped to REGB14(r14, such as...) Figure 6 (as shown in the image)

[0204] -CCE15(c15, such as) Figure 6 (As shown in the image) mapped to REGB15 (r15, such as...) Figure 6 (as shown in the image)

[0205] In these implementations, a first search space set corresponding to the first aggregation level set is assigned to CORESET0. Specifically, since CORESET0 contains 24 REGBs, the first aggregation level set supports a maximum of aggregation level 16 (i.e., the first aggregation level set supports aggregation levels 4, 8, and 16). Therefore, since the aggregation levels in the second aggregation level set should be equal to or higher than the aggregation levels in the first aggregation level set, UE 101 determines that the maximum aggregation level of the second search space set for the second CORESET CT2 is 16. The CCE index of each candidate for each aggregation level in the second aggregation level set is listed in the following table:

[0206]

[0207]

[0208] For some implementations of determining the second CORESET CT2 based on the first CORRESET CT1 containing CORESET0, please refer to [link to relevant documentation]. Figure 7Specifically, after UE 101 receives the MIB information containing the configuration of CORESET0 from BS 102, UE 101 can retrieve the following information from the configuration: (1) the frequency domain size of CORESET0 contains 24 PRBs; and (2) the time domain size of CORESET0 contains 2 OFDM symbols. Then, UE 101 / BS 102 determine the second CORESETCT2 according to the following: (1) the configuration of CORESET0; (2) the predefined frequency domain size of the second CORESET CT2 containing 24 PRBs; and (3) the predefined time domain size of the second CORESET CT2 containing 3 OFDM symbols of 2 resource units.

[0209] Specifically, regarding CORESET0,n of these implementation schemes shift Configured to 5, The configuration is 24*2=48, and L is configured as 6. Therefore, CCE0 of CORESET0 is mapped to REGB5. Furthermore, the mapping relationship from CCE to REG in CORESET0 is defined as follows:

[0210] -CCE0(C0, such as Figure 6 (As shown in the image) mapped to REGB5 (R5, such as...) Figure 6 (as shown in the image)

[0211] -CCE2(C2, such as Figure 6 (As shown in the image) mapped to REGB6 (R6, such as...) Figure 6 (as shown in the image)

[0212] -CCE4(C4, such as Figure 6 (As shown in the image) mapped to REGB7 (R7, such as...) Figure 6 (as shown in the image)

[0213] -CCE6(C6, such as) Figure 6 (As shown in the image) is mapped to REGB0(R0, such as...) Figure 6 (as shown in the image)

[0214] -CCE1(C1, such as Figure 6 (As shown in the image) mapped to REGB1(R1, such as...) Figure 6 (as shown in the image)

[0215] -CCE3(C3, such as Figure 6 (As shown in the image) mapped to REGB2 (R2, such as...) Figure 6 (as shown in the image)

[0216] -CCE5(C5, such as) Figure 6 (As shown in the image) mapped to REGB3 (R3, such as...) Figure 6 (as shown in the image)

[0217] -CCE7(C7, such as) Figure 6 (As shown in the image) mapped to REGB4 (R4, such as...) Figure 6 (as shown in the image)

[0218] Therefore, regarding the second CORESET CT2: (1) in the time domain, UE 101 determines that the first OFDM symbol s0 of the second CORESET CT2 starts from the first OFDM symbol S0 of CORESET0; and (2) in the frequency domain, when the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0, since the frequency band of the second CORESET CT2 is equal to the frequency band of CORESET0, UE 101 determines that the initial PRB P2 of the second CORESET CT2 is assigned to the initial PRB P1 of CCE0 of CORESET0.

[0219] In some implementations, when the frequency band of the second CORESET CT2 is equal to the frequency band of CORESET0, the CCE-to-REG mapping relationship of the second CORESET CT2 in the first resource unit RU0 is the same as the CCE-to-REG mapping relationship of CORESET0, as follows:

[0220] -CCE0(c0, as shown) Figure 6 (As shown in the image) mapped to REGB5(r5, such as...) Figure 6 (as shown in the image)

[0221] -CCE2(c2, as shown) Figure 6 (As shown in the image) mapped to REGB6(r6, such as...) Figure 6 (as shown in the image)

[0222] -CCE4(c4, e.g.) Figure 6 (As shown in the image) mapped to REGB7 (r7, such as...) Figure 6 (as shown in the image)

[0223] -CCE6(c6, e.g.) Figure 6 (As shown in the image) is mapped to REGB0(r0, such as...) Figure 6 (as shown in the image)

[0224] -CCE1(c1, as shown) Figure 6 (As shown in the image) is mapped to REGB1(r1, such as...) Figure 6 (as shown in the image)

[0225] -CCE3(c3, such as) Figure 6 (As shown in the image) is mapped to REGB2(r2, such as...) Figure 6 (as shown in the image)

[0226] -CCE5(c5, as shown) Figure 6 (As shown in the image) mapped to REGB3(r3, such as...) Figure 6 (as shown in the image)

[0227] -CCE7(c7, e.g.) Figure 6 (As shown in the image) mapped to REGB4(r4, such as...) Figure 6 (as shown in the image)

[0228] In some implementations, the CCEs and REGs in the second resource unit RU1 are sequentially indexed, and the mapping relationship from CCE to REG in the second CORESET CT2 of the second resource unit RU1 is defined as follows:

[0229] -CCE8(c8, as shown) Figure 6 (As shown in the image) mapped to REGB8(r9, as shown in the image) Figure 6 (as shown in the image)

[0230] -CCE9(c9, as shown) Figure 6 (As shown in the image) mapped to REGB9(r9, such as...) Figure 6 (as shown in the image)

[0231] -CCE10(c10, such as) Figure 6 (As shown in the image) mapped to REGB10 (r10, such as...) Figure 6 (as shown in the image)

[0232] -CCE11(c11, as shown) Figure 6 (As shown in the image) mapped to REGB11(r11, such as...) Figure 6 (as shown in the image)

[0233] In these implementations, a first search space set corresponding to the first aggregation level set is assigned to CORESET0. Specifically, since CORESET0 contains 8 REGBs, the first aggregation level set supports a maximum of aggregation level 8 (i.e., the first aggregation level set supports aggregation levels 4 and 8). Therefore, since the aggregation levels in the second aggregation level set should be equal to or higher than the aggregation levels in the first aggregation level set, UE 101 determines that the maximum aggregation level of the second search space set for the second CORESET CT2 is 8. The CCE index of each candidate for each aggregation level in the second aggregation level set is listed in the following table:

[0234]

[0235] In some implementations, since the number of CCEs (i.e., 12) of the second CORESET CT2 is greater than 8, another aggregation level can be introduced as follows:

[0236]

[0237] Figure 8 The diagram illustrates a flowchart of a method for wireless communication according to some embodiments of this application. (Reference) Figure 8 In some embodiments of this application, method 800 is performed by a UE (e.g., UE 101) and a BS (e.g., BS 102).

[0238] Operation S801 is performed to transmit the configuration of the first core set to the UE by the BS. Operation S802 is performed to receive configuration information from the BS by the UE. Operations S803 and S804 are performed to determine the second core set by the UE and the BS respectively based on the first core set. In some embodiments, the initial PRB of the second core set may be assigned as the initial PRB of a specific CCE of the first core set. It should be noted that the BS 102 may perform operation S804 after performing S801.

[0239] In some embodiments, when the frequency band of the second CORESET is within the frequency band of the first CORESET, the initial PRB of the second CORESET can be assigned as the initial PRB of a specific CCE of the first CORESET.

[0240] In some implementations, a first CORESET may include CORESET0 and a particular CCE of the first CORESET includes the initial CCE of CORESET0 (i.e., CCE0 of CORESET0). In a second CORESET, the initial CCE of the second CORESET is mapped to the initial REGB of the second CORESET.

[0241] In some embodiments, the CCE of the second CORESET may be mapped to the CCE of the first CORESET. The mapping should be a one-to-one mapping or a many-to-one mapping.

[0242] In some embodiments, a first CORESET may include CORESET0, and a particular CCE of the first CORESET may have a CCE offset relative to the initial CCE of CORESET0. In these embodiments, the CCE offset is 1, and the particular CCE is CCE1. In a second CORESET, the initial CCE of the second CORESET is mapped to the REGB of the second CORESET, and the index of the initial CCE is mapped to the index of the REGB based on the following formula:

[0243] -

[0244] Where REGBindex represents the index of REGB, and N_RegBundle represents the number of REGBs in the first CORESET. L represents the number of REGs in the first CORESET, and L represents the number of REGs in a REGB.

[0245] In some implementations, the initial PRB of the second core set can be assigned as the initial PRB of the REGB of the first core set. Specifically, when the frequency band of the second core set is within the frequency band of the first core set, the initial PRB of the second core set can be assigned as the initial PRB of the REGB of the first core set. In these implementations, the first core set may include core set 0, and the REGB may include the initial REG of core set 0 (i.e., REGB0 of core set 0).

[0246] In some implementations, the second CORESET may contain at least one resource unit defined in the time domain. Specifically, the duration (i.e., OFDM symbol) of one of the at least one resource unit may be the same as the duration (i.e., OFDM symbol) of the first CORESET. The second CORESET may contain a plurality of REGBs, which are sequentially indexed within the at least one resource unit. Furthermore, the first REGB in the second CORESET may contain the same number of REGBs in both the time and frequency domains as the REGBs in the first CORESET.

[0247] Furthermore, the at least one resource unit includes a first resource unit, and the CCE to REG mapping of the first resource unit of the second CORESET may be the same as the CCE to REG mapping of the first CORESET. The at least one resource unit may include a second resource unit, and the CCE to REGB mapping of the second resource unit of the second CORESET has the same index.

[0248] In some implementations, the BS may further transmit the configuration of the first CORESET along with the first search space set. The first search space set corresponds to a first aggregation level. For example, when the first CORESET includes CORESET0, the configuration of the first CORESET may include search space zero, and the first aggregation level may include aggregation levels 4, 8, and 16, respectively, corresponding to the number of CCE candidates 4, 2, and 1. Next, the UE may receive the configuration of the first CORESET and the first search space set. The UE / BS may determine a second aggregation level for the second search space set of the second CORESET. In these implementations, the second aggregation level may be equal to or higher than the first aggregation level.

[0249] Figure 9 The illustration shows an example block diagram of apparatus 9 according to an embodiment of the present disclosure.

[0250] like Figure 9 As shown, device 9 may include at least one non-transitory computer-readable medium ( Figure 9 (not illustrated in the diagram), receiving circuit system 91, transmitting circuit system 93, and coupled to the non-transitory computer-readable medium ( Figure 9 (Not illustrated in the diagram) Processor 95 of receiving circuit system 91 and transmitting circuit system 93. Device 9 can be user equipment or base station.

[0251] Although elements such as processor 95, transmitting circuitry system 93, and receiving circuitry system 91 are described in the singular in this figure, plural forms are included unless explicitly stated to be limited to the singular. In some embodiments of this disclosure, receiving circuitry system 91 and transmitting circuitry system 93 are combined into a single device, such as a transceiver. In specific embodiments of this disclosure, device 9 may further include input devices, memory, and / or other components.

[0252] In some embodiments of this disclosure, the non-transitory computer-readable medium may store computer-executable instructions thereon to cause a processor to perform the methods relative to a base station as described above. For example, when executed, the computer-executable instructions cause the processor 95 to interact with the receiving circuitry system 91 and the transmitting circuitry system 93 in order to perform the methods relative to the base station as described above. Figures 1 to 2A The BS described herein performs the operations.

[0253] In some embodiments of this disclosure, the non-transitory computer-readable medium may store computer-executable instructions thereon to cause a processor to perform the methods relative to a user equipment as described above. For example, when executed, the computer-executable instructions cause the processor 95 to interact with the receiving circuitry system 91 and the transmitting circuitry system 93 in order to perform the methods relative to... Figures 1 to 2A The UE depicted in the document performs the operation described therein.

[0254] Those skilled in the art will understand that the operation of the methods described in connection with the aspects disclosed herein can be embodied directly in hardware, as a software module executed by a processor, or a combination of both. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. Furthermore, in some aspects, the steps of the method may reside as one or any combination or set of code and / or instructions on a non-transitory computer-readable medium that can be incorporated into a computer program product.

[0255] Although this disclosure has been described through specific embodiments, it will be apparent to those skilled in the art that many alternatives, modifications, and variations will be apparent. For example, various components of the embodiments may be interchanged, added, or substituted in other embodiments. Furthermore, not all elements of each figure need to be used in the operation of the disclosed embodiments. For example, those skilled in the art to which the disclosed embodiments pertain will be able to make and use the teachings of this disclosure by simply employing elements of independent technical solutions. Therefore, the embodiments of this disclosure as set forth herein are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit and scope of this disclosure.

[0256] In this document, the terms "include" or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not only include those elements, but may include other elements not expressly listed or inherent to the process, method, article, or apparatus. Without further constraints, the prefix "a" or "an" preceding an element, or the like, does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element. Furthermore, the term "another" is defined as at least a second or more. As used herein, the terms "having," etc., are defined as "including."

Claims

1. A user equipment (UE) method comprising: receiving a configuration of a first control resource set (CORESET); and determining a second CORESET based on the first CORESET, wherein an initial physical resource block (PRB) of the second CORESET is allocated as an initial PRB of a control channel element (CCE) of the first CORESET, wherein a frequency band of the second CORESET is smaller than a frequency band of the first CORESET, and wherein the first CORESET is a CORESET zero (CORESET0).

2. The method of claim 1, wherein the initial PRB of the second CORESET is allocated as the initial PRB of the CCE of the first CORESET and the frequency band of the second CORESET is within the frequency band of the first CORESET.

3. The method of claim 2, wherein the CCE of the first CORESET is an initial CCE of the CORESET0.

4. The method of claim 3, wherein an initial CCE of the second CORESET maps to an initial resource element group bundle (REGB) of the second CORESET.

5. The method of claim 2, wherein the CCE of the first CORESET has a CCE offset with respect to an initial CCE of the CORESET0.

6. The method of claim 5, wherein the CCE offset is 1 and an index of the CCE is 1.

7. The method of claim 6, wherein an initial CCE of the second CORESET maps to a resource element group bundle (REGB) of the second CORESET, an index of the initial CCE of the second CORESET maps to an index of the REGB based on the following formula: where REGB index denotes the index of the REGB, N_RegBundle denotes the number of REGBs of the first CORESET, denotes the number of resource element groups, REGs, of the first CORESET, and L denotes the number of REGs in one REGB.

8. The method of claim 1, wherein the initial PRB of the second CORESET is allocated as the initial PRB of a resource element group bundle (REGB) of the first CORESET.

9. The method of claim 8, wherein the initial PRB of the second CORESET is allocated as the initial PRB of the REGB of the first CORESET when a frequency band of the second CORESET is within a frequency band of the first CORESET.

10. The method of claim 9, wherein the REGB is an initial REG of the CORESET0.

11. The method of claim 1, wherein the second CORESET starts from a first OFDM symbol of the first CORESET.

12. The method of claim 1, wherein the second CORESET includes at least one resource unit defined in time domain.

13. The method of claim 12, wherein a duration of one of the at least one resource unit is the same as a duration of the first CORESET.

14. The method of claim 12, wherein the second CORESET contains a plurality of resource element group bundles (REGBs), and the REGBs are sequentially indexed in the at least one resource unit.

15. The method of claim 14, wherein a first one of the REGBs of the second CORESET contains a same number of resource element groups (REGs) in a time domain and in a frequency domain, respectively, as a REGB in the first CORESET.

16. The method of claim 12, wherein the at least one resource unit contains a first resource unit, a control channel element to resource element group (CCE to REG) mapping relationship of the first resource unit of the second CORESET is the same as a CCE to REG mapping relationship of the first CORESET.

17. The method of claim 16, wherein the at least one resource unit further contains a second resource unit, a CCE to REGB mapping relationship of the second resource unit of the second CORESET has a same index.

18. The method of claim 1, wherein receiving the configuration further comprises: receiving the configuration of the first CORESET and a first search space set corresponding to a first aggregation level; wherein the method further comprises: determining a second aggregation level of a second search space of the second CORESET, wherein the second aggregation level is equal to or higher than the first aggregation level.

19. A base station method comprising: determining a second control resource set (CORESET) based on a first CORESET, wherein an initial physical resource block (PRB) of the second CORESET is allocated as an initial PRB of a control channel element (CCE) of the first CORESET, wherein a frequency band of the second CORESET is smaller than a frequency band of the first CORESET, and wherein the first CORESET is a CORESET zero (CORESET0); and transmitting a configuration of the first control resource set (CORESET).

20. The method of claim 19, wherein the initial PRB of the second CORESET is allocated as the initial PRB of the CCE of the first CORESET and the frequency band of the second CORESET is within the frequency band of the first CORESET.

21. The method of claim 20, wherein the CCE of the first CORESET contains an initial CCE of the CORESET0.

22. The method of claim 21, wherein an initial resource element group bundle (REGB) of the second CORESET maps to an initial CCE of the second CORESET.

23. The method of claim 21, wherein the CCE has a CCE offset relative to the initial CCE of the CORESET0.

24. The method of claim 23, wherein the CCE offset is 1 and an index of the CCE is 1.

25. The method of claim 24, wherein an initial CCE of the second CORESET maps to a resource element group bundle (REG) bundle of the second CORESET, an index of the CCE of the second CORESET maps to an index of the REG bundle based on a following formula: where REGB index denotes the index of the REGB, N_RegBundle denotes the number of REGBs of the first CORESET, denotes the number of resource element groups, REGs, of the first CORESET, and L denotes the number of REGs in one REGB.

26. The method of claim 19, wherein the initial PRB of the second CORESET is allocated as the initial PRB of a resource element group bundle (REG) bundle of the first CORESET.

27. The method of claim 26, wherein the initial PRB of the second CORESET is allocated as the PRB of the REG bundle of the first CORESET when a frequency band of the second CORESET is within a frequency band of the first CORESET.

28. The method of claim 27, wherein the REG bundle is an initial REG of the CORESET0.

29. The method of claim 19, wherein the second CORESET starts from a first OFDM symbol of the first CORESET.

30. The method of claim 19, wherein the second CORESET consists of at least one resource unit defined in time domain.

31. The method of claim 30, wherein a duration of one of the at least one resource unit is the same as a duration of the first CORESET.

32. The method of claim 30, wherein the second CORESET includes a plurality of resource element group bundles (REG) bundles, and the REG bundles are defined per resource unit and sequentially numbered in an order of the at least one resource unit.

33. The method of claim 32, wherein a first REG bundle of the REG bundles of the second CORESET and a REG bundle of the first CORESET respectively include a same number of resource element groups (REGs) in time domain and in frequency domain.

34. The method of claim 30, wherein the at least one resource unit includes a first resource unit, a control channel element to resource element group (CCE to REG) mapping relationship of the first resource unit of the second CORESET is the same as a CCE to REG mapping relationship of the first CORESET.

35. The method of claim 34, wherein the at least one resource unit further includes a second resource unit, a CCE to REG mapping relationship of the second resource unit of the second CORESET has a same index.

36. The method of claim 19, wherein transmitting the configuration further comprises: transmitting the configuration of the first CORESET and a first search space set corresponding to a first aggregation level; wherein the method further comprises: determining a second aggregation level of a second search space of the second CORESET, wherein the second aggregation level is equal to or higher than the first aggregation level.

37. An apparatus for wireless communication comprising: A non-transitory computer-readable medium having stored thereon computer-executable instructions; receiving circuitry; transmitting circuitry; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry, and the transmitting circuitry; wherein the computer-executable instructions cause the processor to implement the method of any one of claims 1-36.

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