Methods for physical downlink control channel and physical downlink shared channel enhancements
Enhancements in PDCCH and PDSCH designs through repetitions and REG-bundle Bundles address low SNR issues, improving detection and decoding success rates in wireless communications.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MEDIATEK SINGAPORE PTE LTD
- Filing Date
- 2025-11-07
- Publication Date
- 2026-05-15
AI Technical Summary
Low signal-to-noise ratio in wireless communications, particularly in non-terrestrial networks, leads to low success rates in signal/channel detection, demodulation, and decoding, necessitating enhancements in PDCCH and PDSCH designs.
Implementing PDCCH and PDSCH repetitions, with indications for enabling/disabling in the payload of the PBCH, and supporting REG-bundle Bundles to enhance decoding success rates and robustness.
Improves the success rate of signal/channel detection, demodulation, and decoding, ensuring uninterrupted communication in various environments, including NTN scenarios.
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Figure CN2025133291_15052026_PF_FP_ABST
Abstract
Description
METHODS FOR PHYSICAL DOWNLINK CONTROL CHANNEL AND PHYSICAL DOWNLINK SHARED CHANNEL ENHANCEMENTSCROSS REFERENCE TO RELATED PATENT APPLICATION (S)
[0001] The present disclosure is part of a non-provisional application claiming the priority benefit of PCT Application No. PCT / CN2024 / 130484, filed 7 November 2024, the content of which herein being incorporated by reference in its entirety.TECHNICAL FIELD
[0002] The present disclosure is generally related to wireless communications and, more particularly, to physical downlink control channel (PDCCH) and physical downlink shared channel (PDSCH) enhancements.BACKGROUND
[0003] Unless otherwise indicated herein, approaches described in this section are not prior art to the claims listed below and are not admitted as prior art by inclusion in this section.
[0004] The wireless communications technologies have grown exponentially over the years. A long-term evolution (LTE) system offers high peak data rates, low latency, improved system capacity, and low operating cost resulting from simplified network architecture. LTE system, also known as the 4th generation (4G) system, also provides seamless integration to older wireless networks, such as GSM, CDMA and universal mobile telecommunication system (UMTS) . In LTE system, an evolved universal terrestrial radio access network (E-UTRAN) includes a plurality of evolved Node-Bs (eNodeBs or eNBs) communicating with a plurality of mobile stations, referred to as user equipment (UE) . The 3rd generation partner project (3GPP) network normally includes a hybrid of 2G / 3G / 4G systems. The next generation mobile network (NGMN) board has decided to focus the future NGMN activities on defining the end-to-end requirements for 5th generation (5G) new radio (NR) systems and 6th generation (6G) systems.
[0005] In wireless communication, a low signal-to-noise (SNR) ratio received at the receiver (e.g., UE) often occurs due to a poor background environment or long-distance communications. For example, in a non-terrestrial network (NTN) system, the distance between the UE and the satellite is quite long, and the radio condition of the communications therebetween may vary rapidly due to satellite and UE movements. Consequently, a low SNR ratio will lead to low success rates in signal / channel detection, demodulation, and / or decoding at the receiver.
[0006] Therefore, there is a need to provide proper schemes to address this issue.SUMMARY
[0007] The following summary is illustrative only and is not intended to be limiting in any way. That is, the following summary is provided to introduce concepts, highlights, benefits and advantages of the novel and non-obvious techniques described herein. Select implementations are further described below in the detailed description. Thus, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended for use in determining the scope of the claimed subject matter.
[0008] One objective of the present disclosure is proposing schemes, concepts, designs, systems, methods and apparatus pertaining to PDCCH and PDSCH enhancements. It is believed that the above-described issue would be avoided or otherwise alleviated by implementing one or more of the proposed schemes described herein.
[0009] In one aspect, a method may involve an apparatus receiving a physical broadcast channel (PBCH) from a network node, wherein a payload of the PBCH comprises an indication for enabling or disabling multiple candidates of a PDCCH or a PDSCH. The method may also involve the apparatus receiving multiple candidates of the PDCCH or the PDSCH from the network node in an event that the payload of the PBCH comprises the indication for enabling multiple candidates of the PDCCH or the PDSCH, wherein each candidate comprises a same or different content. The method may further involve the apparatus decoding the PDCCH or the PDSCH based on the multiple candidates of the PDCCH or the PDSCH.
[0010] In one aspect, a method may involve a network node transmitting a PBCH to an apparatus, wherein a payload of the PBCH comprises an indication for enabling or disabling multiple candidates of a PDCCH or a PDSCH. The method may also involve the network node transmitting multiple candidates of the PDCCH or the PDSCH to the apparatus in an event that the payload of the PBCH comprises the indication for enabling multiple candidates of the PDCCH or the PDSCH, wherein each candidate comprises a same or different content.
[0011] It is noteworthy that, although description provided herein may be in the context of certain radio access technologies, networks and network topologies such as LTE, LTE-Advanced, LTE-Advanced Pro, 5G, NR, Internet-of-Things (IoT) and Narrow Band Internet of Things (NB-IoT) , Industrial Internet of Things (IIoT) , beyond 5G (B5G) , and 6G, the proposed concepts, schemes and any variation (s) / derivative (s) thereof may be implemented in, for and by other types of radio access technologies, networks and network topologies. Thus, the scope of the present disclosure is not limited to the examples described herein.BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of the present disclosure. The drawings illustrate implementations of the disclosure and, together with the description, serve to explain the principles of the disclosure. It is appreciable that the drawings are not necessarily in scale as some components may be shown to be out of proportion than the size in actual implementation in order to clearly illustrate the concept of the present disclosure.
[0013] FIG. 1 is a diagram depicting an example scenario of the time-frequency structure of a control resource set (CORESET) for the PDCCH in 5G NR.
[0014] FIG. 2 is a diagram depicting an example scenario of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented.
[0015] FIG. 3 is a diagram depicting an example scenario of the control signaling for data transmission and resource allocation in accordance with an implementation of the present disclosure.
[0016] FIG. 4 is a diagram depicting an example scenario of the parameters of the common CORESET#0 with and without repetitions in accordance with an implementation of the present disclosure.
[0017] FIG. 5 is a diagram depicting another example scenario of the parameters of the common CORESET#0 with and without repetitions in accordance with an implementation of the present disclosure.
[0018] FIG. 6 is a diagram depicting an example scenario of PDCCH CORESET length extension without repetition in accordance with an implementation of the present disclosure.
[0019] FIG. 7 is a diagram depicting an example scenario of control channel element (CCE) -to-resource element group (REG) mapping for a CORESET in accordance with an implementation of the present disclosure.
[0020] FIG. 8 is a diagram depicting an example scenario of PDCCH CORESET length extension without repetition in accordance with an implementation of the present disclosure.
[0021] FIG. 9 is a diagram depicting an example scenario of PDCCH CORESET length extension with repetition in accordance with an implementation of the present disclosure.
[0022] FIG. 10 is a diagram depicting an example scenario of PDCCH CORESET length extension with new CCE, REG-bundle and / or AL designs in accordance with an implementation of the present disclosure.
[0023] FIG. 11 is a block diagram of an example communication system in accordance with an implementation of the present disclosure.
[0024] FIG. 12 is a flowchart of an example process in accordance with an implementation of the present disclosure.
[0025] FIG. 13 is a flowchart of another example process in accordance with an implementation of the present disclosure. DETAILED DESCRIPTION OF PREFERRED IMPLEMENTATIONS
[0026] Detailed embodiments and implementations of the claimed subject matters are disclosed herein. However, it shall be understood that the disclosed embodiments and implementations are merely illustrative of the claimed subject matters which may be embodied in various forms. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that description of the present disclosure is thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art. In the description below, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations. Overview
[0027] Implementations in accordance with the present disclosure relate to various techniques, methods, schemes and / or solutions pertaining to PDCCH and PDSCH enhancements. According to the present disclosure, a number of possible solutions may be implemented separately or jointly. That is, although these possible solutions may be described below separately, two or more of these possible solutions may be implemented in one combination or another.
[0028] In the present disclosure, NTN refers to a network that uses radio frequency (RF) and information processing resources carried on high, medium and low orbit satellites or other high-altitude communication platforms to provide communication services for UEs. According to the load capacity on the satellite, there are two typical scenarios, namely: transparent payload and regenerative payload. In transparent payload mode, the satellite does not process the signal and waveform in the communication service but, rather, only functions as an RF amplifier to forward data. In regenerative payload mode, the satellite, other than RF amplification, also has the processing capabilities of modulation / demodulation, coding / decoding, switching, routing and so on.
[0029] In 5G NR, PDCCH is the key channel for UEs to receive downlink control information (DCI) , which includes scheduling assignments for the PDSCH, uplink grants for the physical uplink shared channel (PUSCH) , and other control signaling essential for data transmission and resource allocation. The PDCCH candidates within a CORESET may each be defined by the time-frequency resources and parameters for the control channel. More specifically, a PDCCH candidate may refer to a set of contiguous CCEs within a given search space at a specific aggregation level, where the UE performs blind decoding to detect a possible PDCCH transmission (or called PDCCH candidate) .
[0030] FIG. 1 illustrates an example scenario 100 of the time-frequency structure of a CORESET for the PDCCH in 5G NR. As shown in FIG. 1, a CORESET may be depicted as a time-frequency grid, where the time domain corresponds to orthogonal frequency division multiplexing (OFDM) symbols and the frequency domain corresponds to resource blocks (RBs) . The CORESET is partitioned into CCEs, and each CCE is further mapped to a set of REG-bundles. Part (A) of FIG. 1 depicts the case where the CORESET spans 2 OFDM symbols in the time domain (i.e., the CORESET length=2 symbols) and 12 RBs in the frequency domain, with each CCE (e.g., CCE #0 to CCE #3) mapped to a REG-bundle consisting of 6 RBs. Part (B) of FIG. 1 depicts the case where the CORESET spans 2 OFDM symbols in the time domain and 24 RBs in the frequency domain, with each CCE (e.g., CCE #0 to CCE #7) mapped to a REG-bundle consisting of 6 RBs. This structure provides the basic allocation unit for PDCCH candidate (s) within the CORESET. However, in 5G NR communications, the current constraints of link budgets (e.g., low SNR ratio) significantly hinder the accurate decoding of the PDCCH and / or PDSCH. To ensure reliable communication for users, it is essential to enhance the designs of the PDCCH and / or the PDSCH, as well as the CORESET associated with the PDCCH.
[0031] In view of the above, the present disclosure is motivated by, but not limited to, NTN scenarios, and proposes a number of schemes pertaining to PDCCH and PDSCH enhancements. According to the schemes of the present disclosure, PDCCH and / or PDSCH repetitions are supported to address the decoding challenges presented by the existing link budget limitations. Specifically, at least one new field, such as an indication for enabling / disabling PDCCH / PDSCH repetitions (i.e., the same content is repeated in each PDCCH / PDSCH candidate) or for enabling / disabling REG-bundle Bundle (in which multiple PDCCH candidates, each with a different content, are transmitted, i.e., no repetitions) , may be introduced in the payload of the PBCH, and the UE (if it supports PDCCH / PDSCH repetition capability or supports REG-bundle Bundle) may receive multiple candidates (e.g., may be referred to as repetitions if the same content is repeated in each candidate) of the PDCCH and / or the PDSCH, where each candidate contains the same (or different) content. As such, the UE may decode the PDCCH and / or the PDSCH based on the multiple candidates. Accordingly, by applying the schemes of the present disclosure, the success rate of signal / channel detection, demodulating, and / or decoding at the receiver may be enhanced to improve the robustness and efficiency of user data transmission, and to ensure uninterrupted communication in various environments including NTN scenarios.
[0032] FIG. 2 illustrates an example scenario 200 of a communication environment in which various solutions and schemes in accordance with the present disclosure may be implemented. Scenario 200 involves a UE 210 in wireless communication with a network 220 (e.g., a wireless network including an NTN and a TN) via a terrestrial network node 222 (e.g., a BS such as an eNB, a Next Generation Node-B (gNB) , a transmission / reception point (TRP) , or a gateway) and / or a non-terrestrial network node 224 (e.g., a satellite) . For example, the terrestrial network node 222 and the non-terrestrial network node 224 may form an NTN serving cell for wireless communication with the UE 210. In such communication environment, the UE 210, the network 220, and the terrestrial network node 222 and / or the non-terrestrial network node 224 may implement various schemes pertaining to PDCCH and PDSCH enhancements in accordance with the present disclosure, as described below. It is noteworthy that, while the various proposed schemes may be individually or separately described below, in actual implementations, some or all of the proposed schemes may be utilized or otherwise implemented jointly. Of course, each of the proposed schemes may be utilized or otherwise implemented individually or separately.
[0033] FIG. 3 illustrates an example scenario 300 of the control signaling for data transmission and resource allocation in accordance with an implementation of the present disclosure. In step 302, the UE receives a PBCH (e.g., a MIB) from the NW (e.g., a satellite and / or a BS) , wherein the payload of the PBCH contains the configuration of PDCCH / PDSCH repetition or REG-bundle Bundle (e.g., an enable / disabled indication and / or a repetition number (or a REG-bundle Bundle size) ) and CORESET zero (referred to herein as CORESET#0) . In step 304, the UE receives multiple PDCCH candidates on CORESET#0, wherein each PDCCH candidate contains the same content which may include the information of the time-frequency resources associated with the SIB1. The PDCCH candidates with the same content may be referred to as PDCCH repetitions, and the UE may accumulate the repetitions to increase the success rate of PDCCH decoding. In step 306, the UE receives the PDSCH containing the SIB1 based on the time-frequency resources configured by the PDCCH. In one example, the PDSCH containing the SIB1 may also be repeated, i.e., multiple PDSCH candidates may be transmitted / received to increase the success rate of PDSCH decoding. After that, the repetition indication for PDCCH / PDSCH after receiving the SIB1 may be based on the previously configured repetition indication in step 302, or may be configured via the SIB1, or another radio resource control (RRC) signaling, medium access control (MAC) control element (CE) , or downlink control information (DCI) .
[0034] Under the first proposed scheme of the present disclosure, the designs of repetition indication for CORESET#0 are provided. Specifically, for the system information block type 1 (SIB1) , the network may configure PDCCH repetition for the SIB1 via the PDCCH-ConfigSIB1 information element (IE) in the master information block (MIB) , and the repetition number or the enable / disabled indication may be configured with multiple options as follows. In option 1, new fields / parameters may be added in the PDCCH-ConfigSIB1 IE or in the ControlResourceSetZero IE, as shown below in Table 1. Table. 1
[0035] In option 2 of the first proposed scheme, new values for the configuration of PDCCH repetition may be added in the controlResourceSetZero field / parameter in the controlResourceSetZero IE, as shown below in Table 2. Table. 2 FIG. 4 illustrates an example scenario 400 of the parameters of the common CORESET#0 with and without repetitions in accordance with an implementation of the present disclosure. As shown in FIG. 4, new values of the ControlResourceSetZero field, such as values 15-29, are added for configuring the parameter as the double of the original value for the common CORESET#0 with repetitions, while other values of the ControlResourceSetZero field remain the same interpretation for configuration of the parameters of the common CORESET#0 without repetitions.
[0036] In option 3 of the first proposed scheme, some values of the ControlResourceSetZero field / parameter in the PDCCH-ConfigSIB1 IE may be re-interpreted for configuration of the parameters of the common CORESET#0 with repetitions, when the repetition indication is configured as shown below in Table 3. Table. 3 In one example, when the UE supports PDCCH repetition capability and when the synchronization signal (SS) -reference signal received power (RSRP) or RSRP of the downlink pathloss reference meet the PDCCH repetition trigger conditions, some values of the ControlResourceSetZero field are re-interpreted for configuration of the parameters of the common CORESET#0 with repetitions if pdcch-RepetitionEnabled is true, where SS-RSRP is defined as the linear average over the power contributions of the resource elements that carry secondary synchronization signals. In another example, when the UE supports PDCCH repetition capability and when the SS-RSRP or RSRP of the downlink pathloss reference meets the PDCCH repetition trigger conditions, some values of the ControlResourceSetZero field are re-interpreted for enabling the common CORESET#0 with repetitions if pdcch-RepetitionEnabled is true, where SS-RSRP is defined as the linear average over the power contributions of the resource elements that carry secondary synchronization signals. FIG. 5 illustrates an example scenario 500 of the parameters of the common CORESET#0 with and without repetitions in accordance with an implementation of the present disclosure. As shown in FIG. 5, some values of the ControlResourceSetZero field, such as values 3-5, 10-11, and 14, are re-interpreted for configuring the parameter as the double, triple, or quadruple of the original value for the common CORESET#0 with repetitions, while other values of the ControlResourceSetZero field remain the same interpretation for configuration of the parameters of the common CORESET#0 without repetitions.
[0037] In some implementations, the repetition parameter (s) that is / are configured in the MIB to be applied to CORESET#0 for the SIB1 may also be applied for the PDCCH for other SIBs (e.g., SIB19 or others) and other PDSCH before a dedicated PDCCH resource is provided or before the PDCCH repetition number is configured by the SIB1 / RRC / MAC CE / DCI.
[0038] Under the second proposed scheme of the present disclosure, the designs of repetition determination for CORESET#0 are provided. Specifically, during cell search, the UE may determine from the MIB that a CORESET for Type0-PDCCH common search space (CSS) set is present, the UE may determine a number of consecutive resource blocks and a number of consecutive symbols for the CORESET of the Type0-PDCCH CSS set from the controlResourceSetZero field in the pdcch-ConfigSIB1 IE, and the UE may determine the repetition number for the CORESET of the Type0-PDCCH CSS set from the PDCCH-ConfigSIB1 IE in the MIB with or without meeting PDCCH repetition trigger conditions, if the UE supports PDCCH repetition capability or the UE determines the repetition number for the CORESET from the PDCCH repetition trigger conditions if the UE supports PDCCH repetition capability.
[0039] In option 1 of the second proposed scheme, the PDCCH repetition trigger conditions may be defined as follows in Table 4. Table. 4
[0040] In option 2 of the second proposed scheme, the PDCCH repetition trigger conditions may be defined as follows in Table 5. Table. 5
[0041] In option 3 of the second proposed scheme, the PDCCH repetition trigger conditions may be defined as follows in Table 6. Table. 6
[0042] Under the third proposed scheme of the present disclosure, the designs of the repetition indication for the PDCCH after the SIB1 are provided. Specifically, for the PDCCH after the SIB1, the network may configure PDCCH repetition via the SIB1, an RRC signaling, a MAC CE, or a DCI. In option 1, new field (s) for the repetition indication for the PDCCH after the SIB1 may be added in the SIB1 / RRC / MAC CE / DCI. In option 2, new values for the repetition indication for the PDCCH after the SIB1 may be added in the SIB1 / RRC / MAC CE / DCI. In option 3, some field (s) in the SIB1 / RRC / MAC CE / DCI may be re-interpreted for the repetition indication for the PDCCH after the SIB1.
[0043] In some implementations, the options 1 to 3 of the third proposed scheme may reuse the designs of the first and second proposed schemes, and the new field (s) , new values, and / or re-interpreted field (s) is / are within the SIB1 / RRC / MAC CE / DCI.
[0044] Under the fourth proposed scheme of the present disclosure, the design of the repetition configuration and the determination of PDSCH are provided. Specifically, for the case of the PDCCH repetition being enabled, for example, using the designs of the first / second / third proposed scheme above, the PDSCH that follows the PDCCH is also repetition enabled. The PDSCH corresponding to the PDCCH is, by default, set to N*M repetitions, where N is the repetition number of the PDCCH, and M is the repetition factor for the PDSCH, which means N*M PDSCH repetitions in total. The repetition factor, M, is an integer and may be pre-defined (e.g., network-configured) or by default.
[0045] Under the fifth proposed scheme of the present disclosure, the designs of PDCCH CORESET length extension with REG-bundle Bundle are provided. REG-bundle Bundle is a new concept / structure, which refers to a number (i.e., bundle) of REG-bundles. When compared to the current 5G NR framework in which a CORESET length is 2 symbols (as shown in FIG. 1) , the CORESET length in the present disclosure may be extended to 4 symbols with or without PDCCH repetition. Specifically, in option 1, the CORESET length extension is provided without PDCCH repetition (as will be described later in detailed in FIG. 6) , while in option 2, the CORESET length extension is provided with PDCCH repetition (as will be described later in detailed in FIG. 9) . Furthermore, in option 3, the CORESET length extension is provided with new CCE, REG-bundle and / or AL designs (as will be described later in detailed in FIG. 10) .
[0046] FIG. 6 illustrates an example scenario 600 of PDCCH CORESET length extension without repetition in accordance with an implementation of the present disclosure. As shown in FIG. 6, there are 4 REG-bundle Bundles within the CORESET, with REG-bundle Bundle size N=2. The N REG-bundles within the same REG-bundle Bundle are contiguous in the time domain and occupy the same frequency resources. The payload / content of different REG-bundles within the same REG-bundle Bundle is different. The CCE-to-REG mapping method may be descripted as follows: (i) for non-interleaving cases: f (x) =x (same as 5G NR) ; and (ii) for interleaving cases: same as 5G NR except The REG-bundle indices are numbered in an increasing order in a time-first manner, starting with 0 for the first OFDM symbol and the lowest-numbered resource block in the CORESET. The aggregation level (AL) and CCE relationship may be calculated as: N_AL = N_CCE / N. The enable / disable indication for REG-bundle Bundle may employ the same indication method of the pdcch-RepetitionEnabled and / or pdcch-RepetitionNum, and the REG-bundle Bundle size may have the same size as pdcch-RepetitionNum.
[0047] In alternative A of option 1 of the fifth proposed scheme, the CCE-to-REG mapping method may be described in more detail as follows. A CORESET consists of resource blocks in the frequency domain and symbols in the time domain, where N is the size of the REG-bundle Bundle. REGs within a CORESET are numbered in an increasing order in a time-first manner, starting with for the first OFDM symbol and the lowest-numbered RB within the n-th symbols of the CORESET, where n is the component index of REG-bundle Bundle and n=0, 1, …, N-1. The CCE-to-REG mapping for a CORESET can be interleaved or non-interleaved and is described by REG bundles: (i) REG bundle i is defined as REGs {iL, iL+1, ..., iL+L-1} where L is the REG bundle size, and is the number of REGs in the CORESET; (ii) CCE j consists of REG bundles {f (6j / L) , f (6j / L +1) ..., f (6j / L +6 / L-1) } where f (·) is an interleaver. For non-interleaved CCE-to-REG mapping, L=6 and f (x) =x. For interleaved CCE-to-REG mapping, L∈ {2, 6} for and for The interleaver is defined by where x = cR+ r, r = 0, 1, ..., R –1, c = 0, 1, ..., C –1, and R∈ {2, 3, 6} . An example of the CCE-to-REG mapping described in option 1-A is shown in part (A) of FIG. 7.
[0048] In alternative B of option 1 of the fifth proposed scheme, the CCE-to-REG mapping method may be described in more detail as follows. A CORESET consists of resource blocks in the frequency domain and symbols in the time domain, where N is the size of the REG-bundle Bundle. REGs within a CORESET are numbered in an increasing order in a time-first manner, starting with 0 for the first OFDM symbol and the lowest-numbered RB in the CORESET. The CCE-to-REG mapping for a CORESET can be interleaved or non-interleaved and is described by REG bundles: (i) REG bundle is defined as a pre-defined table or formular or equation; (ii) CCE j consists of REG bundles {f (6j / L) , f (6j / L +1) ..., f (6j / L +6 / L-1) } where f (·) is an interleaver. For non-interleaved CCE-to-REG mapping, L=6 and f (x) =x. For interleaved CCE-to-REG mapping, L∈ {2, 6} for and for The interleaver is defined by where x = cR+ r, r = 0, 1, ..., R –1, c = 0, 1, ..., C –1, and R∈ {2, 3, 6} . An example of the CCE-to-REG mapping described in option 1-B is shown in part (B) of FIG. 7.
[0049] FIG. 8 illustrates an example scenario 800 of PDCCH CORESET length extension without repetition in accordance with an implementation of the present disclosure. As shown in FIG. 8, it is assumed that the CORESET is configured with AL=8, 24 RB, and length=4 symbols. Part (A) of FIG. 8 depicts the case of interleaved mapping, while part (B) of FIG. 8 depicts the case of non-interleaved mapping. For CORESET#0 configured by the ControlResourceSetZero IE, and are defined by clause 13 of TS 38.213, and the UE may assume the interleaved mapping with L=6, R=2, and In addition, the UE may assume normal cyclic prefix when CORESET#0 is configured by the MIB or the SIB1. The UE may assume the same precoding is being used within a REG bundle.
[0050] FIG. 9 illustrates an example scenario 900 of PDCCH CORESET length extension with repetition in accordance with an implementation of the present disclosure. As shown in FIG. 9, there are 4 REG-bundle Bundles within the CORESET, with REG-bundle Bundle size N=2. The N REG-bundles within the same REG-bundle Bundle are contiguous in the time domain and occupy the same frequency resources. The payload / content of different REG-bundles within the same REG-bundle Bundle is the same. Specifically, the content (i.e., CCE) of the REG-bundles other than the first REG-bundle within the REG-bundle Bundle is the copy / replica (both content and RE mapping, etc. ) of the first REG-bundle. For example, the first REG-bundle within the first REG-bundle Bundle are REG-bundle#0-0, REG-bundle#1-0, etc., and the REG-bundles other than the first REG-bundle within the first REG-bundle Bundle are REG-bundle#0-1, REG-bundle#1-1, etc. The CCE-to-REG mapping method remains the same as 5G NR for the first REG-bundle within the REG-bundle Bundle. The content of the other REG-bundle within the REG-bundle Bundle is the same as the first REG-bundle within the REG-bundle Bundle. The CCE-to-REG mapping method remains the same as NR for interleaved or non-interleaved cases for the first REG-bundle in each REG-bundle Bundle. The REG-bundle index within the same REG-bundle Bundle is the same. The AL and CCE relationship may be calculated as: N_AL = N_CCE / N, where the N_CCE includes all the CCEs including the CCE repetitions. All the first REG-bundles within the REG-bundle Bundles in total are the main bundles. The main bundles of the control-resource set consist of RBs in the frequency domain and symbols in the time domain. The enable / disable indication for REG-bundle Bundle may employ the same indication method as the pdcch-RepetitionEnabled and / or pdcch-RepetitionNum, and the REG-bundle Bundle size may have the same size as pdcch-RepetitionNum.
[0051] FIG. 10 illustrates an example scenario 1000 of PDCCH CORESET length extension with new CCE, REG-bundle and / or AL designs in accordance with an implementation of the present disclosure. As shown in FIG. 10, there are 4 REG-bundles within the CORESET, with each CCE containing 12 REGs (or may be 4 or 8 REGs in different implementations) , and each REG-bundle containing 12 REGs (or may be 4 or 8 REGs) . A CCE may be mapped to one or more REG-bundles. For the case of one CCE mapped to multiple REG-bundles, the number of REG-bundles corresponding to one CCE may be an integer. The AL and CCE relationship may be calculated as: N_AL = N_CCE.
[0052] Under the sixth proposed scheme of the present disclosure, the method of PDCCH / PDSCH resource allocation is provided. Specifically, when transmitting / receiving PDCCH CORESET#0 for the SIB1 (or other SIBs) , if the UE is configured with pdcch-RepetitionEnabled and pdcch-RepetitionNum, the same PDCCH resource mapping method may be applied across the consecutive symbols for each consecutive symbols. Additionally, or optionally, when transmitting / receiving PDSCH that follows the CORESET / PDCCH, if the UE is configured with pdcch-RepetitionEnabled and pdcch-RepetitionNum, the same PDSCH resource mapping method may be applied across the N_PDSCH_sym*pdcch-RepetitionNum consecutive symbols for each N_PDSCH_sym consecutive symbols. Illustrative Implementations
[0053] FIG. 11 illustrates an example communication system 1100 having an example communication apparatus 1110 and an example network apparatus 1120 in accordance with an implementation of the present disclosure. Each of communication apparatus 1110 and network apparatus 1120 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to PDCCH and PDSCH enhancements, including scenarios / schemes described above as well as processes 1200 and 1300 described below.
[0054] Communication apparatus 1110 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus. For instance, communication apparatus 1110 may be implemented in a smartphone, a smartwatch, a personal digital assistant, an electronic control unit (ECU) in a vehicle, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer. Communication apparatus 1110 may also be a part of a machine type apparatus, which may be an IoT, NB-IoT, or IIoT UE such as an immobile or a stationary apparatus, a home apparatus, a roadside unit (RSU) , a wire communication apparatus or a computing apparatus. For instance, communication apparatus 1110 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center. Alternatively, communication apparatus 1110 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing (CISC) processors. Communication apparatus 1110 may include at least some of those components shown in FIG. 11 such as a processor 1112, for example. Communication apparatus 1110 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and / or user interface device) , and, thus, such component (s) of communication apparatus 1110 are neither shown in FIG. 11 nor described below in the interest of simplicity and brevity.
[0055] Network apparatus 1120 may be a part of an electronic apparatus, which may be a network node such as a satellite, a BS, a cell, a router or a gateway of a 4G / 5G / B5G / 6G, NR, IoT, NB-IoT, IIoT, or NTN network. For instance, network apparatus 1120 may be implemented in a satellite or an eNB / gNB / TRP in a 4G / 5G, NR, IoT, NB-IoT, IIoT, or NTN network. Alternatively, network apparatus 1120 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more RISC or CISC processors. Network apparatus 1120 may include at least some of those components shown in FIG. 11 such as a processor 1122, for example. Network apparatus 1120 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and / or user interface device) , and, thus, such component (s) of network apparatus 1120 are neither shown in FIG. 11 nor described below in the interest of simplicity and brevity.
[0056] In one aspect, each of processor 1112 and processor 1122 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is, even though a singular term “aprocessor” is used herein to refer to processor 1112 and processor 1122, each of processor 1112 and processor 1122 may include multiple processors in some implementations and a single processor in other implementations in accordance with the present disclosure. In another aspect, each of processor 1112 and processor 1122 may be implemented in the form of hardware (and, optionally, firmware) with electronic components including, for example and without limitation, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors and / or one or more varactors that are configured and arranged to achieve specific purposes in accordance with the present disclosure. In other words, in at least some implementations, each of processor 1112 and processor 1122 is a special-purpose machine specifically designed, arranged and configured to perform specific tasks in a device (e.g., as represented by communication apparatus 1110) and a network node (e.g., as represented by network apparatus 1120) in accordance with various implementations of the present disclosure.
[0057] In some implementations, communication apparatus 1110 may also include a transceiver 1116 coupled to processor 1112 and capable of wirelessly transmitting and receiving data. In some implementations, transceiver 1116 may be capable of wirelessly communicating with different types of UEs and / or wireless networks of different RATs. In some implementations, transceiver 1116 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 1116 may be equipped with multiple transmit antennas and multiple receive antennas for beamforming and multiple-input multiple-output (MIMO) wireless communications. In some implementations, network apparatus 1120 may also include a transceiver 1126 coupled to processor 1122. Transceiver 1126 may include a transceiver capable of wirelessly transmitting and receiving data. In some implementations, transceiver 1126 may be capable of wirelessly communicating with different types of UEs of different RATs. In some implementations, transceiver 1126 may be equipped with a plurality of antenna ports (not shown) such as, for example, four antenna ports. That is, transceiver 1126 may be equipped with multiple transmit antennas and multiple receive antennas for beamforming and MIMO wireless communications.
[0058] In some implementations, communication apparatus 1110 may further include a memory 1114 coupled to processor 1112 and capable of being accessed by processor 1112 and storing data therein. In some implementations, network apparatus 1120 may further include a memory 1124 coupled to processor 1122 and capable of being accessed by processor 1122 and storing data therein. Each of memory 1114 and memory 1124 may include a type of random-access memory (RAM) such as dynamic RAM (DRAM) , static RAM (SRAM) , thyristor RAM (T-RAM) and / or zero-capacitor RAM (Z-RAM) . Alternatively, or additionally, each of memory 1114 and memory 1124 may include a type of read-only memory (ROM) such as mask ROM, programmable ROM (PROM) , erasable programmable ROM (EPROM) and / or electrically erasable programmable ROM (EEPROM) . Alternatively, or additionally, each of memory 1114 and memory 1124 may include a type of non-volatile random-access memory (NVRAM) such as flash memory, solid-state memory, ferroelectric RAM (FeRAM) , magnetoresistive RAM (MRAM) and / or phase-change memory.
[0059] Each of communication apparatus 1110 and network apparatus 1120 may be a communication entity capable of communicating with each other using various proposed schemes in accordance with the present disclosure. For illustrative purposes and without limitation, a description of capabilities of communication apparatus 1110, as a UE, and network apparatus 1120, as a network node (e.g., a satellite and / or a BS) , is provided below with processes 1200 and 1300. Illustrative Processes
[0060] FIG. 12 illustrates an example process 1200 in accordance with an implementation of the present disclosure. Process 1200 may be an example implementation of above scenarios / schemes, whether partially or completely, with respect to PDCCH and PDSCH enhancements. Process 1200 may represent an aspect of implementation of features of communication apparatus 1110. Process 1200 may include one or more operations, actions, or functions as illustrated by one or more of blocks 1210 to 1230. Although illustrated as discrete blocks, various blocks of process 1200 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 1200 may be executed in the order shown in FIG. 12 or, alternatively, in a different order. Process 1200 may be implemented by or in communication apparatus 1110 or any suitable UE or machine type devices. Solely for illustrative purposes and without limitation, process 1200 is described below in the context of communication apparatus 1110, as a UE, and network apparatus 1120, as a network node. Process 1200 may begin at block 1210.
[0061] At block 1210, process 1200 may involve processor 1112 of communication apparatus 1110, receiving, via transceiver 1116, a PBCH from network apparatus 1120, wherein a payload of the PBCH comprises an indication for enabling or disabling multiple candidates of a PDCCH or a PDSCH. Process 1200 may proceed from block 1210 to block 1220.
[0062] At block 1220, process 1200 may involve processor 1112 receiving, via transceiver 1116, multiple candidates of the PDCCH or the PDSCH from network apparatus 1120 in an event that the payload of the PBCH comprises the indication for enabling multiple candidates of the PDCCH or the PDSCH, wherein each candidate comprises a same or different content. Process 1200 may proceed from block 1220 to block 1230.
[0063] At block 1230, process 1200 may involve processor 1112 decoding the PDCCH or the PDSCH based on the multiple candidates of the PDCCH or the PDSCH.
[0064] In some implementations, the payload of the PBCH may include a MIB, and the indication is configured in a reserved bit, a PDCCH-ConfigSIB1 IE, or a ControlResourceSetZero IE of the MIB.
[0065] In some implementations, the payload of the PBCH may further include a field indicating a number of the multiple candidates of the PDCCH or the PDSCH.
[0066] In some implementations, the field may be specific for indicating the number of the multiple candidates of the PDCCH or the PDSCH, and may be configured in a PDCCH-ConfigSIB1 IE or a ControlResourceSetZero IE of the MIB, or may be configured in a ControlResourceSetZero parameter with additional values specific for configuration of the multiple candidates of the PDCCH or the PDSCH.
[0067] In some implementations, process 1200 may further involve processor 1112 determining a first number of the multiple candidates of the PDCCH or the PDSCH based on the field or a ControlResourceSetZero parameter in the payload of the PBCH, wherein some values of the ControlResourceSetZero parameter are re-interpreted for configuration of the multiple candidates of the PDCCH or the PDSCH.
[0068] In some implementations, the determination of the first number of the multiple candidates of the PDCCH or the PDSCH may be performed in at least one of the following events: (i) an event that communication apparatus 1110 supports PDCCH or PDSCH repetition capability; and (ii) an event that an RSRP of a downlink pathloss reference is less than a first threshold.
[0069] In some implementations, process 1200 may further involve processor 1112 determining a second number of the multiple candidates of the PDCCH or the PDSCH in at least one of the following events: (i) an event that communication apparatus 1110 does not support PDCCH or PDSCH repetition capability; and (ii) an event that the RSRP of the downlink pathloss reference is not less than the first threshold. Alternatively, process 1200 may further involve processor 1112 determining a third number of the multiple candidates of the PDCCH or the PDSCH in an event that the RSRP of the downlink pathloss reference is less than a second threshold and larger than the first threshold.
[0070] In some implementations, the indication may be applied to a CORESET#0 for a SIB1, and may also be applied to the PDCCH for one or more SIBs other than the SIB1 and to other PDSCH, or another indication for PDCCH repetition, which is configured by network apparatus 1120 via the SIB1, an RRC signaling, a MAC CE, or a DCI, may be applied to the PDCCH for the one or more SIBs other than the SIB1.
[0071] In some implementations, the indication may be for enabling the multiple candidates of the PDCCH, and multiple candidates of the PDSCH may be enabled responsive to enabling the multiple candidates of the PDCCH. Additionally, process 1200 may further involve processor 1112 determining a first number of the multiple candidates of the PDCCH and a second number of the multiple candidates of the PDSCH, wherein the second number is obtained by applying a repetition factor to the first number, and the repetition factor is configured by network apparatus 1120 or by a pre-defined or default value.
[0072] In some implementations, the multiple candidates or other multiple candidates of the PDCCH may be received on multiple search spaces associated with a CORESET, each of the multiple candidates may include the same content, each of the other multiple candidates may include the different content, the multiple search spaces may include a first search space and a second search space occupying a same frequency resource, and a starting symbol of a monitoring occasion of the second search space may be located right after an ending symbol of a monitoring occasion of the first search space. Additionally, or optionally, the multiple candidates or the other multiple candidates of the PDCCH within the CORESET may correspond to a same candidate index. Additionally, or optionally, each CCE or each REG-bundle within the CORESET may include 4, 8, or 12 REGs.
[0073] In some implementations, the multiple candidates of the PDCCH or the PDSCH may be associated with a same resource allocation.
[0074] FIG. 13 illustrates an example process 1300 in accordance with an implementation of the present disclosure. Process 1300 may be an example implementation of above scenarios / schemes, whether partially or completely, with respect to PDCCH and PDSCH enhancements. Process 1300 may represent an aspect of implementation of features of network apparatus 1120. Process 1300 may include one or more operations, actions, or functions as illustrated by one or more of blocks 1310 and 1320. Although illustrated as discrete blocks, various blocks of process 1300 may be divided into additional blocks, combined into fewer blocks, or eliminated, depending on the desired implementation. Moreover, the blocks of process 1300 may be executed in the order shown in FIG. 13 or, alternatively, in a different order. Process 1300 may be implemented by or in network apparatus 1120 as well as any variations thereof. Solely for illustrative purposes and without limitation, process 1300 is described below in the context of communication apparatus 1110, as a UE, and network apparatus 1120, as a network node. Process 1300 may begin at block 1310.
[0075] At block 1310, process 1300 may involve processor 1122 of network apparatus 1120, transmitting, via transceiver 1126, a PBCH to communication apparatus 1110, wherein a payload of the PBCH comprises an indication for enabling or disabling multiple candidates of a PDCCH or a PDSCH. Process 1300 may proceed from block 1310 to block 1320.
[0076] At block 1320, process 1300 may involve processor 1122 transmitting, via transceiver 1126, multiple candidates of the PDCCH or the PDSCH to communication apparatus 1110 in an event that the payload of the PBCH comprises the indication for enabling multiple candidates of the PDCCH or the PDSCH, wherein each candidate comprises a same or different content.
[0077] In some implementations, the payload of the PBCH may include a MIB, and the indication is configured in a reserved bit, a PDCCH-ConfigSIB1 IE, or a ControlResourceSetZero IE of the MIB.
[0078] In some implementations, the payload of the PBCH may further include a field indicating a number of the multiple candidates of the PDCCH or the PDSCH.
[0079] In some implementations, the field may be specific for indicating the number of the multiple candidates of the PDCCH or the PDSCH, and may be configured in a PDCCH-ConfigSIB1 IE or a ControlResourceSetZero IE of the MIB, or may be configured in a ControlResourceSetZero parameter with additional values specific for configuration of the multiple candidates of the PDCCH or the PDSCH.
[0080] In some implementations, process 1300 may further involve processor 1122 determining a first number of the multiple candidates of the PDCCH or the PDSCH based on the field or a ControlResourceSetZero parameter in the payload of the PBCH, wherein some values of the ControlResourceSetZero parameter are re-interpreted for configuration of the multiple candidates of the PDCCH or the PDSCH. Additionally, the determination of the first number of the multiple candidates of the PDCCH or the PDSCH may be performed in at least one of the following events: (i) an event that communication apparatus 1110 supports PDCCH or PDSCH repetition capability; and (ii) an event that an RSRP of a downlink pathloss reference is less than a first threshold.
[0081] In some implementations, process 1300 may further involve processor 1122 determining a second number of the multiple candidates of the PDCCH or the PDSCH in at least one of the following events: (i) an event that communication apparatus 1110 does not support PDCCH or PDSCH repetition capability; and (ii) an event that the RSRP of the downlink pathloss reference is not less than the first threshold. Alternatively, process 1300 may further involve processor 1122 determining a third number of the multiple candidates of the PDCCH or the PDSCH in an event that the RSRP of the downlink pathloss reference is less than a second threshold and larger than the first threshold.
[0082] In some implementations, the indication may be applied to a CORESET#0 for a SIB1, and may be also applied to the PDCCH for one or more SIBs other than the SIB1 and to other PDSCH, or another indication for PDCCH repetition, which is configured by network apparatus 1120 via the SIB1, an RRC signaling, a MAC CE, or a DCI, may be applied to the PDCCH for the one or more SIBs other than the SIB1.
[0083] In some implementations, the indication may be for enabling the multiple candidates of the PDCCH, and multiple candidates of the PDSCH may be enabled responsive to enabling the multiple candidates of the PDCCH. Additionally, process 1300 may further involve processor 1122 determining a first number of the multiple candidates of the PDCCH and a second number of the multiple candidates of the PDSCH, wherein the second number is obtained by applying a repetition factor to the first number, and the repetition factor is configured by network apparatus 1120 or by a pre-defined or default value.
[0084] In some implementations, the multiple candidates or other multiple candidates of the PDCCH may be received on multiple search spaces associated with a CORESET, each of the multiple candidates may include the same content, each of the other multiple candidates may include the different content, the multiple search spaces may include a first search space and a second search space occupying a same frequency resource, and a starting symbol of a monitoring occasion of the second search space may be located right after an ending symbol of a monitoring occasion of the first search space. Additionally, or optionally, the multiple candidates or the other multiple candidates of the PDCCH within the CORESET may correspond to a same candidate index. Additionally, or optionally, each CCE or each REG-bundle within the CORESET may include 4, 8, or 12 REGs. Additionally, or optionally, the multiple candidates of the PDCCH or the PDSCH may be associated with a same resource allocation. Additional Notes
[0085] The herein-described subject matter sometimes illustrates different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely examples, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively "associated" such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as "associated with" each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being "operably connected" , or "operably coupled" , to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being "operably couplable" , to each other to achieve the desired functionality. Specific examples of operably couplable include but are not limited to physically mateable and / or physically interacting components and / or wirelessly interactable and / or wirelessly interacting components and / or logically interacting and / or logically interactable components.
[0086] Further, with respect to the use of substantially any plural and / or singular terms herein, those having skill in the art can translate from the plural to the singular and / or from the singular to the plural as is appropriate to the context and / or application. The various singular / plural permutations may be expressly set forth herein for sake of clarity.
[0087] Moreover, it will be understood by those skilled in the art that, in general, terms used herein, and especially in the appended claims, e.g., bodies of the appended claims, are generally intended as “open” terms, e.g., the term “including” should be interpreted as “including but not limited to, ” the term “having” should be interpreted as “having at least, ” the term “includes” should be interpreted as “includes but is not limited to, ” etc. It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases "at least one" and "one or more" to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to implementations containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an, " e.g., “a” and / or “an” should be interpreted to mean “at least one” or “one or more; ” the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should be interpreted to mean at least the recited number, e.g., the bare recitation of "two recitations, " without other modifiers, means at least two recitations, or two or more recitations. Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. In those instances where a convention analogous to “at least one of A, B, or C, etc. ” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention, e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and / or A, B, and C together, etc. It will be further understood by those within the art that virtually any disjunctive word and / or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B. ”
[0088] From the foregoing, it will be appreciated that various implementations of the present disclosure have been described herein for purposes of illustration, and that various modifications may be made without departing from the scope and spirit of the present disclosure. Accordingly, the various implementations disclosed herein are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Claims
1.A method, comprising:receiving, by a processor of an apparatus, a physical broadcast channel (PBCH) from a network node, wherein a payload of the PBCH comprises an indication for enabling or disabling multiple candidates of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) ;receiving, by the processor, multiple candidates of the PDCCH or the PDSCH from the network node in an event that the payload of the PBCH comprises the indication for enabling multiple candidates of the PDCCH or the PDSCH, wherein each instance comprises a same or different content; anddecoding, by the processor, the PDCCH or the PDSCH based on the multiple candidates of the PDCCH or the PDSCH.2.The method of Claim 1, wherein the payload of the PBCH comprises a master information block (MIB) , and the indication is configured in a reserved bit, a PDCCH-ConfigSIB1 information element (IE) , or a ControlResourceSetZero IE of the MIB.3.The method of Claim 1, wherein the payload of the PBCH further comprises a field indicating a number of the multiple candidates of the PDCCH or the PDSCH.4.The method of Claim 3, wherein the field is specific for indicating the number of the multiple candidates of the PDCCH or the PDSCH, and is configured in a PDCCH-ConfigSIB1 information element (IE) or a ControlResourceSetZero IE of the MIB, or is configured in a ControlResourceSetZero parameter with additional values specific for configuration of the multiple candidates of the PDCCH or the PDSCH.5.The method of Claim 3, further comprising:determining, by the processor, a first number of the multiple candidates of the PDCCH or the PDSCH based on the field or a ControlResourceSetZero parameter in the payload of the PBCH, wherein some values of the ControlResourceSetZero parameter are re-interpreted for configuration of the multiple candidates of the PDCCH or the PDSCH.6.The method of Claim 5, wherein the determination of the first number of the multiple candidates of the PDCCH or the PDSCH is performed in at least one of the following events:an event that the apparatus supports PDCCH or PDSCH repetition capability; andan event that a reference signal received power (RSRP) of a downlink pathloss reference is less than a first threshold.7.The method of Claim 6, further comprising:determining, by the processor, a second number of the multiple candidates of the PDCCH or the PDSCH in at least one of the following events:an event that the apparatus does not support PDCCH or PDSCH repetition capability; andan event that the RSRP of the downlink pathloss reference is not less than the first threshold; ordetermining, by the processor, a third number of the multiple candidates of the PDCCH or the PDSCH in an event that the RSRP of the downlink pathloss reference is less than a second threshold and larger than the first threshold.8.The method of Claim 1, wherein the indication is applied to a control resource set zero (CORESET#0) for a system information block type 1 (SIB1) , and is also applied to the PDCCH for one or more SIBs other than the SIB1 and other PDSCH, or another indication for PDCCH repetition, which is configured by the network node via the SIB1, a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE) , or a downlink control information (DCI) , is applied to the PDCCH for the one or more SIBs other than the SIB1.9.The method of Claim 1, wherein the indication is for enabling the multiple candidates of the PDCCH, and multiple candidates of the PDSCH are enabled responsive to enabling the multiple candidates of the PDCCH, and the method further comprises:determining, by the processor, a first number of the multiple candidates of the PDCCH and a second number of the multiple candidates of the PDSCH, wherein the second number is obtained by applying a repetition factor to the first number, and the repetition factor is configured by the network node or by a pre-defined or default value.10.The method of Claim 1, wherein:the multiple candidates or other multiple candidates of the PDCCH are received on multiple search spaces associated with a control resource set (CORESET) , each of the multiple candidates comprises the same content, each of the other multiple candidates comprises the different content, the multiple search spaces comprise a first search space and a second search space occupying a same frequency resource, and a starting symbol of a monitoring occasion of the second search space is located right after an ending symbol of a monitoring occasion of the first search space;the multiple candidates or the other multiple candidates of the PDCCH within the CORESET correspond to a same candidate index; oreach control channel element (CCE) or each resource element group (REG) -bundle within the CORESET comprises 4, 8, or 12 REGs.11.The method of Claim 1, wherein the multiple candidates of the PDCCH or the PDSCH are associated with a same resource allocation.12.A method, comprising:transmitting, by a processor of a network node, a physical broadcast channel (PBCH) to an apparatus, wherein a payload of the PBCH comprises an indication for enabling or disabling multiple candidates of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) ; andtransmitting, by the processor, multiple candidates of the PDCCH or the PDSCH to the apparatus in an event that the payload of the PBCH comprises the indication for enabling multiple candidates of the PDCCH or the PDSCH, wherein each candidate comprises a same or different content.13.The method of Claim 12, wherein the payload of the PBCH comprises a master information block (MIB) , and the indication is configured in a reserved bit, a PDCCH-ConfigSIB1 information element (IE) , or a ControlResourceSetZero IE of the MIB.14.The method of Claim 12, wherein the payload of the PBCH further comprises a field indicating a number of the multiple candidates of the PDCCH or the PDSCH.15.The method of Claim 14, wherein the field is specific for indicating the number of the multiple candidates of the PDCCH or the PDSCH, and is configured in a PDCCH-ConfigSIB1 information element (IE) or a ControlResourceSetZero IE of the MIB, or is configured in a ControlResourceSetZero parameter with additional values specific for configuration of the multiple candidates of the PDCCH or the PDSCH.16.The method of Claim 14, further comprising:determining, by the processor, a first number of the multiple candidates of the PDCCH or the PDSCH based on the field or a ControlResourceSetZero parameter in the payload of the PBCH, wherein some values of the ControlResourceSetZero parameter are re-interpreted for configuration of the multiple candidates of the PDCCH or the PDSCH; andwherein the determination of the first number of the multiple candidates of the PDCCH or the PDSCH is performed in at least one of the following events:an event that the apparatus supports PDCCH or PDSCH repetition capability; andan event that a reference signal received power (RSRP) of a downlink pathloss reference is less than a first threshold.17.The method of Claim 16, further comprising:determining, by the processor, a second number of the multiple candidates of the PDCCH or the PDSCH in at least one of the following events:an event that the apparatus does not support PDCCH or PDSCH repetition capability; andan event that the RSRP of the downlink pathloss reference is not less than the first threshold; ordetermining, by the processor, a third number of the multiple candidates of the PDCCH or the PDSCH in an event that the RSRP of the downlink pathloss reference is less than a second threshold and larger than the first threshold.18.The method of Claim 12, wherein the indication is applied to a control resource set zero (CORESET#0) for a system information block type 1 (SIB1) , and is also applied to the PDCCH for one or more SIBs other than the SIB1 and other PDSCH, or another indication for PDCCH repetition, which is configured by the network node via the SIB1, a radio resource control (RRC) signaling, a medium access control (MAC) control element (CE) , or a downlink control information (DCI) , is applied to the PDCCH for the one or more SIBs other than the SIB1.19.The method of Claim 12, wherein the indication is for enabling the multiple candidates of the PDCCH, and multiple candidates of the PDSCH are enabled responsive to enabling the multiple candidates of the PDCCH, and the method further comprises:determining, by the processor, a first number of the multiple candidates of the PDCCH and a second number of the multiple candidates of the PDSCH, wherein the second number is obtained by applying a repetition factor to the first number, and the repetition factor is configured by the network node or by a pre-defined or default value.20.The method of Claim 12, wherein:the multiple candidates or other multiple candidates of the PDCCH are received on multiple search spaces associated with a control resource set (CORESET) , each of the multiple candidates comprises the same content, each of the other multiple candidates comprises the different content, the multiple search spaces comprise a first search space and a second search space occupying a same frequency resource, and a starting symbol of a monitoring occasion of the second search space is located right after an ending symbol of a monitoring occasion of the first search space;the multiple candidates or the other candidates instances of the PDCCH within the CORESET correspond to a same candidate index;each control channel element (CCE) or each resource element group (REG) -bundle within the CORESET comprises 4, 8, or 12 REGs; orthe multiple candidates of the PDCCH or the PDSCH are associated with a same resource allocation.