Method and apparatus for configuring extended cyclic prefix for broadcast and multicast transmissions

Abstract

The present disclosure describes methods, systems, and devices for configuring an extended cyclic prefix (ECP) for broadcast and / or multicast transmissions. A method includes determining, by a user equipment (UE), ECP resources for at least one of broadcast transmission and multicast transmission according to predefined resources; and receiving, by the UE, a broadcast transmission or a multicast transmission from the base station in the ECP resource. Another method includes configuring, by a base station, ECP resources for at least one of broadcast transmission and multicast transmission according to predefined resources; a broadcast transmission or a multicast transmission is transmitted by the base station to the at least one UE in the ECP resource.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications and, more particularly, to methods and apparatus for configuring an extended cyclic prefix (ECP) for broadcast and / or multicast transmissions. Background Art

[0002] Wireless communication technology is driving the world towards an increasingly interconnected and networked society. In some embodiments, multicast and broadcast services (MBS) may be used, where a group of UEs are expected to receive the same content. There are some issues / problems related to MBS. For example, some UEs may not be nearby, for example, some UEs are in the center of the cell, but other UEs are at the edge of the cell. In some cases, UEs at the edge of the cell may benefit from a single frequency network (SFN) transmission scheme in terms of improving the received SNR (Signal-to-Noise Ratio). Currently, ordinary CPs are only allowed to be used in a limited number of subcarrier spacings, which unnecessarily imposes restrictions on low spectral efficiency MBS deployments. Another issue / problem may include how to support extended cyclic prefixes (ECP) for broadcast or multicast transmissions, where larger CPs may be beneficial for increasing cell coverage.

[0003] The present disclosure describes various embodiments of configuring an ECP for broadcast and / or multicast transmission, addresses at least one of the issues / problems discussed above, provides improvements in the field of wireless communication technology, and increases its efficiency and performance. Summary of the invention

[0004] This document relates to methods, systems, and devices for wireless communications, and more specifically, to methods, systems, and devices for configuring an extended cyclic prefix (ECP) for broadcast and / or multicast transmissions. Various embodiments of the present disclosure can improve resource utilization efficiency, enhance coverage, and / or improve throughput and / or reliability of UE transmissions.

[0005] In one embodiment, the present disclosure describes a method for wireless communication. The method includes: determining, by a user equipment (UE), an extended cyclic prefix (ECP) resource for at least one of a broadcast transmission and a multicast transmission based on predefined resources; and receiving, by the UE, the broadcast transmission or the multicast transmission from a base station in the ECP resource.

[0006] In one embodiment, the present disclosure describes a method for wireless communication. The method includes: configuring, by a base station, an extended cyclic prefix (ECP) resource for at least one of a broadcast transmission and a multicast transmission according to predefined resources; and transmitting, by the base station, the broadcast transmission or the multicast transmission to at least one UE in the ECP resource.

[0007] In some other embodiments, an apparatus for wireless communication may include a memory storing instructions and a processing circuit in communication with the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above method.

[0008] In some other embodiments, a device for wireless communication may include a memory storing instructions and a processing circuit in communication with the memory. When the processing circuit executes the instructions, the processing circuit is configured to perform the above method.

[0009] In some other embodiments, a computer readable medium includes instructions, which, when executed by a computer, cause the computer to perform the above method. The computer readable medium includes a non-transitory computer readable medium.

[0010] The above and other aspects and embodiments thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1A An example of a point-to-point (PTP) radio bearer in a wireless communication system is shown.

[0012] Figure 1B An example of a point-to-multipoint (PTM) radio bearer in a wireless communication system is shown.

[0013] Figure 1C A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0014] Figure 1D A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0015] Figure 2 An example of a network node is shown.

[0016] Figure 3 An example of a user device is shown.

[0017] Figure 4A A flow chart of an exemplary method for wireless communications is shown.

[0018] Figure 4B A flow chart of another exemplary method for wireless communications is shown.

[0019] Figure 5A A schematic diagram of one non-limiting embodiment for wireless communication is shown.

[0020] Figure 5B A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0021] Figure 5C A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0022] Figure 5D A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0023] Figure 5E A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0024] Fig. 6A A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0025] Figure 6B A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0026] Fig. 7A A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0027] Figure 7B A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0028] Fig. 8A A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0029] Figure 8B A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0030] Figure 8C A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0031] Fig.9A A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0032] Fig. 9B A schematic diagram of another non-limiting embodiment for wireless communication is shown.

[0033] Fig. 9C A schematic diagram of another non-limiting embodiment for wireless communication is shown. DETAILED DESCRIPTION

[0034] The present disclosure will now be described in detail below with reference to the accompanying drawings, which form a part of the present disclosure and show specific examples of embodiments by way of illustration. However, it is noted that the present disclosure may be embodied in a variety of different forms, and the subject matter covered or claimed is intended to be interpreted as not being limited to any of the embodiments to be described below.

[0035] Throughout the specification and claims, in addition to the meanings explicitly stated, terms may have slightly different meanings that are suggested or implied in the context. Similarly, the phrases "in one embodiment" or "in some embodiments" used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" used herein do not necessarily refer to different embodiments. The phrases "in one embodiment" or "in some embodiments" used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" used herein do not necessarily refer to different embodiments. For example, the claimed subject matter is intended to include, in whole or in part, a combination of exemplary embodiments or embodiments.

[0036] Typically, terms may be understood at least in part from usage in context. For example, terms used herein, such as "and", "or / or", or "and / or", may include multiple meanings that may depend at least in part on the context in which the terms are used. Typically, "or", if used in an association list (such as A, B, or C), is intended to represent A, B, and C (here used in an inclusive sense), as well as A, B, or C (here used in an exclusive sense). In addition, the terms "one or more" or "at least one" used herein, at least in part depending on the context, may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense. Similarly, terms such as "one", "one / one / a kind of", or "the / said", also at least in part depending on the context, may be understood to convey singular usage or to convey plural usage. In addition, the terms "based on / according to" or "determined by / through ...", also at least in part depending on the context, may be understood to not necessarily be intended to convey an exclusive set of factors, but may allow the presence of additional factors that may not be explicitly described.

[0037] The present disclosure describes methods and apparatus for configuring an extended cyclic prefix (ECP) for broadcast and / or multicast transmissions.

[0038] Next generation (NG) wireless communications for non-limiting examples, the fifth generation (5G), can provide a range of capabilities from fast downloads to support real-time low-latency communications. The wireless communications can use radio bearers (RBs) for multicast broadcast services (MBS). This range of capabilities may require some characteristics of quantity of service (QoS), such as latency, error rate, and priority. In NG wireless communications, one or more service data flows with the same QoS characteristics can be grouped together as QoS flows. Each QoS flow can be identified by a QoS flow identifier to inform the network components of the corresponding characteristics of the QoS flow.

[0039] In some implementations of multicast and broadcast services (MBS), a group of UEs are expected to receive the same content, but the UEs may not be nearby, for example, some UEs are in the center of a cell, but other UEs are at the edge of the cell, and the larger the cyclic prefix (CP), the greater the cell coverage. In terms of improving the received SNR, UEs at the edge of the cell may benefit from a single frequency network (SFN) transmission scheme.

[0040] In some embodiments, more than one transmission and reception point (TRP) may transmit the same MBS service for a group of UEs on the same time / frequency domain resources. In some embodiments, normal CP (NCP) may only be allowed for 15kHz subcarrier spacing and 30kHz subcarrier spacing, which unnecessarily imposes restrictions on low spectrum efficiency MBS deployments.

[0041] In some embodiments of MBS, a network node (e.g., a base station) may use the same transmission mechanism to transmit the same information to a group of UEs (e.g., multicast) or all UEs (e.g., broadcast) in a cell. MBS transmission may be carried on a physical downlink shared channel (PDSCH) received by a group of UEs or all UEs. The PDSCH carrying MBS information may be referred to as a group common PDSCH or MBS PDSCH. MBS transmission depends on the configuration of a common frequency resource (CFR). CFR standardizes a common transmission parameter set for a group of UEs or all UEs receiving MBS, including frequency range, parameter set (numerology), PDCCH monitoring parameters, and PDSCH reception parameters. CFR may need to be associated with a specific bandwidth part (BWP). In some embodiments, there is a limit on the frequency range between the CFR and the associated BWP, and the parameter set of the CFR may be the same as the parameter set of the associated BWP.

[0042] In some embodiments, MBS can be further classified into multicast services and broadcast services. Broadcast services can serve UEs in all radio resource control (RRC) states (i.e., RRC idle state, RRC inactive state, and RRC connected state). For UEs in RRC idle state or RRC inactive state, only the initial DL BWP defined by the control resource set (CORESET#0) with index zero may be valid, that is, the bandwidth and parameter set of the initial DL BWP are equal to the bandwidth of CORESET#0. Therefore, the broadcast CFR exists based on the initial DL BWP or CORESET#0. In some embodiments, in order to improve the broadcast capability, the broadcast CFR can be configured to a frequency range greater than or equal to the bandwidth of CORESET#0. The multicast CFR may depend on any activated DL BWP, and the frequency range of the CFR needs to be limited to the range of the activated DL BWP to ensure that the UE can receive both multicast and unicast.

[0043] In some embodiments, support for extended CP (ECP) may be used to offset the larger delay spread caused by SFN transmissions. One of the issues / topics may include how to support ECP for broadcast or multicast transmissions under the framework of CFR, which may be defined in new radio (NR) MBS. The present disclosure describes various embodiments of configuring ECP for broadcast and / or multicast transmissions, solves at least one of the issues / problems discussed above, provides improvements in the field of wireless communication technology, and improves its efficiency and performance.

[0044] Figure 1A and Figure 1B Various transmission modes are shown for a wireless communication system 100, which includes a core network (CN) 110, a radio access network (RAN) 130, and one or more user equipment (UE) (152, 154, and 156). The RAN 130 may include a wireless network base station, a NG radio access network (NG-RAN) base station or node, which may include a node B (NB, such as a gNB) in a mobile telecommunication environment. In one embodiment, the core network 110 may include a 5G core network (5GC), and the interface 125 may include an NG interface.

[0045] The communication between the RAN and one or more UEs may include at least one radio bearer (RB) for a multicast broadcast service (MBS). The UE may use two different broadcast modes for the RB to receive MBS data. One broadcast mode may be point-to-point (PTP) or unicast, and the other broadcast mode may be point-to-multipoint (PTM) or multicast or broadcast. The PTP broadcast mode and the unicast broadcast mode may refer to the same broadcast mode. The PTP RB may be a DRB, and the PTM RB may be a multicast RB or a broadcast RB. Figure 1A shows a PTP broadcast mode for one or more UEs for MBS; and Figure 1B A PTM broadcast mode for one or more UEs for MBS is shown.

[0046] Reference Figure 1A, the first UE 152 can wirelessly receive communications from the RAN 130 via the PTP RB 142, and wirelessly send communications to the RAN 130 via the uplink channel 141. Similarly, the second UE 154 can wirelessly receive communications from the RAN 130 via the PTP RB 144, and wirelessly send communications to the RAN 130 via the uplink channel 143; and the third UE 156 can wirelessly receive communications from the RAN 130 via the PTP RB 146, and wirelessly send communications to the RAN 130 via the uplink channel 145.

[0047] Reference Figure 1B , the RAN 130 may wirelessly communicate with one or more UEs (152, 154, and 156) via the PTM RB 160. In one embodiment, the first UE 152 may wirelessly send communications to the RAN 130 via an uplink channel 161. Similarly, the second UE 154 may wirelessly send communications to the RAN 130 via an uplink channel 163; and the third UE 156 may wirelessly send communications to the RAN 130 via an uplink channel 165.

[0048] exist Figure 1A and Figure 1B In the wireless communication system 100, the RAN 130 may select which broadcast mode a UE uses for MBS to improve the efficiency of the wireless network. The broadcast mode selection may depend on various types of information, such as but not limited to the load condition of the MBS, the working state of the UE in the PTP broadcast mode or the PTM broadcast mode, or the broadcast mode interest indication of the UE.

[0049] In some implementations, ECP may only be supported at 60kHz sub-carrier spacing (SCS). For other SCSs (e.g., 15kHz, 30kHz, 120kHz, 240kHz, 480kHz, 960kHz, etc.), only NCP is supported. Taking 15kHz SCS as an example, the length of the time slot is 1 millisecond (ms) for both ECP and NCP. For time slots with NCP symbols, such as Figure 1CAs shown, there are 14 symbols in a time slot. For the first symbol of each 0.5 ms, that is, the first symbol or the seventh symbol in the time slot, the CP length is approximately 5.2 microseconds (us) (i.e., 160 sampling points). The CP length of each of the remaining symbols in the time slot is approximately 4.7us (i.e., 144 sampling points). The length of the data part of a symbol in the time slot is 66.7us (i.e., 2048 sampling points). For a time slot with an ECP symbol, there are 12 symbols in a time slot. For each symbol in the time slot, the CP length is approximately 16.7us (i.e., 512 sampling points). The length of the data part of a symbol in the time slot is still 66.7us (i.e., 2048 sampling points). Compared with NCP, in the SFN transmission mode, a larger CP length can offset a larger multipath delay spread and avoid inter-symbol interference.

[0050] In some embodiments, the UE may receive a synchronization signal block (SSB) and system information (e.g., system information block type 1 (SIB1)) to obtain information required for cell access. Configuration information for monitoring the SIB1 PDCCH (e.g., CORESET#0 and search space #0 (which may be referred to as type 0-PDCCH common search space), which jointly determine the timing for monitoring the SIB1 physical downlink control channel (PDCCH), i.e., monitoring occasion (MO)) is provided by a master information block (MIB) carried on a physical broadcast channel (PBCH) in the SSB. In some embodiments, specifically, for the first frequency range (FR1), CORESET#0 can be configured to include 24 physical resource blocks (PRBs), 48 physical resource blocks, and 96 physical resource blocks in the frequency domain and 2 symbols or 3 symbols in the time domain, and CORESET#0 needs to include an SSB with 20 PRBs in the frequency domain. In the time domain, the time domain position of CORESET#0 is determined by the search space configuration associated with CORESET#0. In addition, SSBs with different indices are mapped to one or more MOs (defined according to CORESET#0 and search space#0) according to specific rules. Figure 1DA non-limiting example is shown in which one SSB is mapped to two consecutive MOs, for example, SSB#0 is mapped to MO#0 and MO#1, SSB#1 is mapped to MO#2 and MO#3, and so on. In addition, a UE that selects a specific SSB (e.g., an SSB with index #0) can monitor the SIB1 PDCCH in the corresponding MO (e.g., MO#0 and MO#1), and can receive the corresponding physical downlink shared channel (PDSCH) according to the scheduling information carried in the PDCCH.

[0051] In some embodiments, for NR broadcast, a broadcast CFR is defined for receiving both the multicast control channel (MCCH) (which may include PDCCH and PDSCH) and the multicast traffic channel (MTCH) (which may include PDCCH and PDSCH). The broadcast CFR may be configured as a set of contiguous PRBs, and the frequency range of the CFR may be equal to or greater than the bandwidth of CORESET#0 / the bandwidth of the initial DL BWP. In this way, the UE can receive both NR broadcast and SSB / SIB without switching radio frequency (RF).

[0052] In some embodiments, for NR multicast, the multicast CFR may be configured via RRC signaling. The multicast CFR may be associated with an activated DL BWP and may be included in an activated DL BWP for unicast reception. Thus, the UE may receive multicast and unicast without switching the activated DL BWP. When the configuration information for the multicast CFR does not exist, the frequency range of the multicast CFR may be the same as that of the activated DL BWP.

[0053] In some embodiments, the initial DL BWP in FR1 may be 15kHz or 30kHz, in which case only NCP is supported. The CFR associated with the initial DL BWP may also be 15kHz or 30kHz with NCP. Similarly, when the activated DL BWP is configured as 15kHz or 30kHz, the CP type may also be NCP, and the associated CFR for multicast may only be NCP.

[0054] Figure 2An example of an electronic device 200 for implementing a network base station is shown. The example electronic device 200 may include wireless transmission / reception (Transmitting / Receiving, Tx / Rx) circuit 208 to transmit / receive communications with UE and / or other base stations. The electronic device 200 may also include network interface circuit 209 (e.g., optical or wired interconnect, Ethernet and / or other data transmission media / protocols) for communicating the base station with other base stations and / or a core network. The electronic device 200 may optionally include an input / output (Input / Output, I / O) interface 206 to communicate with an operator or the like.

[0055] The electronic device 200 may also include a system circuit 204. The system circuit 204 may include (one or more) processors 221 and / or a memory 222. The memory 222 may include an operating system 224, instructions 226, and parameters 228. The instructions 226 may be configured for one or more processors in each processor 124 to perform the functions of a network node. The parameters 228 may include parameters for supporting the execution of the instructions 226. For example, the parameters may include network protocol settings, bandwidth parameters, radio frequency mapping allocations, and / or other parameters.

[0056] Figure 3An example of an electronic device (e.g., user equipment (UE)) for implementing a terminal device 300 is shown. UE 300 may be a mobile device, such as a smart phone or a mobile communication module provided in a vehicle. UE 300 may include a communication interface 302, a system circuit 304, an input / output (I / O) interface 306, a display circuit 308, and a storage device 309. The display circuit may include a user interface 310. The system circuit 304 may include any combination of hardware, software, firmware, or other logic / circuits. The system circuit 304 may be implemented, for example, with one or more system on a chip (system on a chip, SoC), application specific integrated circuit (application specific integrated circuit, ASIC), discrete analog and digital circuits, and other circuits. The system circuit 304 may be part of an implementation of any desired function in UE 300. In this regard, the system circuit 304 may include logic to facilitate the following operations: for example, decoding and playing music and video (e.g., MP3, MP4, MPEG, AVI, FLAC, AC3 or WAV decoding and playback); running applications; accepting user input; saving and retrieving application data; establishing, maintaining and terminating cellular phone calls or data connections (as an example, data connections for Internet connections); establishing, maintaining and terminating wireless network connections, Bluetooth connections, or other connections; and displaying relevant information on the user interface 310. The user interface 310 and the input / output (I / O) interface 306 may include a graphical user interface, a touch-sensitive display, tactile feedback or other tactile output, voice or facial recognition input, buttons, switches, speakers, and other user interface elements. Additional examples of the I / O interface 306 may include microphones, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headphone and microphone input / output jacks, Universal Serial Bus (USB) connectors, memory card slots, radiation sensors (e.g., IR (Infra-Red) sensors), and other types of inputs.

[0057] Reference Figure 3, the communication interface 302 may include radio frequency (RF) transmission (Tx) and reception (Rx) circuitry (Tx / Rx circuitry) 316 that handles transmission and reception of signals through one or more antennas 314. The communication interface 302 may include one or more transceivers. The transceiver may be a wireless transceiver that includes modulation / demodulation circuitry, a digital to analog converter (DAC), a shaping table, an analog to digital converter (ADC), a filter, a waveform shaper, a filter, a pre-amplifier, a power amplifier, and / or other logic for transmission and reception through one or more antennas or (for some devices) through a physical (e.g., wired) medium. The transmitted and received signals may follow any of a variety of formats, protocols, modulations (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), channels, bit rates, and encodings. As a specific example, the communication interface 302 may include a transceiver that supports transmission and reception under the following standards: 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed ​​Packet Access (HSPA) +, 4G / Long Term Evolution (LTE), 5G standard, 6G standard, or any other telecommunication standard. However, the technology described below, whether derived from the 3rd Generation Partnership Project (3GPP), GSM (Global System for Mobile Communications) Association, 3GPP2, IEEE (Institute of Electrical and Electronics Engineers), or from other partners or standards bodies, is applicable to other wireless communication technologies.

[0058] Reference Figure 3, the system circuit 304 may include one or more processors 321 and a memory 322. The memory 322 stores, for example, an operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute the instructions 326 to implement the desired functions of the UE 300. The parameters 328 may provide and specify configuration and operating options for the instructions 326. The memory 322 may also store any BT data, WiFi data, 3G data, 4G data, 5G data, 6G data, or other data that the UE 300 will send or has received through the communication interface 302. In various embodiments, the system power for the UE 300 may be provided by a power storage device (such as a battery or a transformer).

[0059] The present disclosure describes various embodiments of configuring an extended cyclic prefix (ECP) for broadcast and / or multicast transmissions, which may be described in part or in whole in the above Figure 2 and Figure 3 The method is implemented on the network base station and / or user equipment described in the embodiment.

[0060] Reference Figure 4A , the present disclosure describes various embodiments of a wireless communication method 400 for configuring an ECP for broadcast and / or multicast transmission. The method 400 may include some or all of the following steps: step 410, determining, by a user equipment (UE) based on predefined resources, an extended cyclic prefix (ECP) resource for at least one of a broadcast transmission and / or a multicast transmission; and / or step 420, receiving, by the UE, a broadcast transmission or a multicast transmission from a base station in the ECP resource.

[0061] Reference Figure 4B , the present disclosure describes various embodiments of a method 450 for wireless communication. The method 450 may include some or all of the following steps: step 460, configuring, by the base station, an extended cyclic prefix (ECP) resource for at least one of a broadcast transmission and a multicast transmission according to predefined resources; and / or step 470, transmitting, by the base station, a broadcast transmission or a multicast transmission to at least one UE in the ECP resource.

[0062] In some implementations, in addition to part, all, or any combination of one or more implementations / examples described, ECP resources are determined in the time domain by excluding predefined resources in the time domain.

[0063] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, the ECP resources include the same frequency range as the broadcast common frequency resources (CFR); and / or the ECP resources are time division multiplexed (TDMed) with the normal cyclic prefix (NCP) resources.

[0064] In some embodiments, in addition to part, all or any combination of one or more embodiments / embodiments described, the predefined resources include resources with predefined attributes or for predefined transmission, and the predefined resources include at least one of the following: uplink resources, flexible resources configured by radio resource control (RRC) signaling (e.g., cell-specific frame structure configuration signaling), synchronization signal block (SSB) resources indicated by RRC signaling, monitoring opportunities (MO) determined according to a control resource set with an index of zero (CORESET#0) and a physical downlink control channel (PDCCH) common search space of type 0, MO determined according to CORESET#0 and a common search space configured by a system information block (SIB), and a common control resource set (CORESET#0). set, CORESET) and a MO determined by a common search space configured by the SIB and associated with at least one SSB, a time slot containing an MO determined according to CORESET#0 and a common search space configured by the SIB, a time slot containing an MO determined according to CORESET#0 and a PDCCH common search space of type 0, or a time slot containing an MO determined according to a common CORESET and a common search space configured by the SIB and associated with at least one SSB.

[0065] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to the ECP resource being after the NCP resource in the time domain, the first symbol of the ECP resource starts at a first time interval after the end of the NCP resource; and / or in response to the ECP resource being before the NCP resource in the time domain, the end of the ECP resource is no later than a second time interval before the first symbol of the NCP resource.

[0066] In some embodiments, except for part, all, or any combination of one or more embodiments / examples described, the first time interval and the second time interval have the same value.

[0067] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, ECP resources are configured in the time domain via RRC signaling, which includes one of the following: a period, an offset, and a duration; or a period and a bitmap corresponding to the period.

[0068] In some implementations, in addition to part, all, or any combination of one or more implementations / examples described, the ECP resources in the time domain are further determined to be within a configured ECP window in the time domain.

[0069] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, ECP resources are determined in the frequency domain by excluding predefined resources in the frequency domain; and / or the predefined resources include an initial downlink (DL) bandwidth part (BWP).

[0070] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, the ECP resources include the same time range as the broadcast CFR; and / or the ECP resources are frequency division multiplexed (FDMed) with normal cyclic prefix (NCP) resources.

[0071] In some implementations, in addition to part, all, or any combination of one or more implementations / embodiments described, ECP resources are configured in the frequency domain via system information.

[0072] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, ECP resources are determined in the time domain and frequency domain by excluding predefined resources; ECP resources are configured in the time domain via RRC signaling, and ECP resources are determined in the frequency domain by excluding predefined resources; ECP resources are configured in the time domain and frequency domain via RRC signaling; and / or ECP resources are determined in the time domain by excluding predefined resources, and ECP resources are configured in the frequency domain via RRC signaling.

[0073] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, the ECP resources are determined in the frequency domain based on the frequency range of at least one multicast common frequency resource (CFR) within the corresponding activated DL BWP and system information signaling including a first frequency range for the ECP resources.

[0074] In some implementations, in addition to part, all, or any combination of one or more implementations / examples described, ECP resources are determined in the frequency domain based on overlapping frequency resources between at least one multicast CFR and the first frequency range.

[0075] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to the subcarrier spacing (SCS) of the multicast CFR within a first frequency range in the frequency domain not supporting ECP, the multicast CFP is determined to be an NCP resource.

[0076] In some implementations, in addition to part, all, or any combination of one or more implementations / examples described, the CP type of each multicast CFR is configured via RRC signaling.

[0077] In some embodiments, in addition to part, all or any combination of one or more embodiments / examples described, in response to the resources configured with the PDCCH MO having different CP types, the PDCCH MO is determined as a MO for monitoring PDCCHs with different CP types, respectively; and / or in response to the resources configured with the PDCCH MO having different SCSs, the PDCCH MO is determined as a MO for monitoring PDCCHs with different SCSs, respectively.

[0078] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to the MO being within the ECP resource, the number of symbols of the MO is determined based on the number of symbols configured for the CORESET associated with the MO and a first predefined rule; and / or in response to the MO being within the ECP resource, the number of resource blocks (RBs) of the MO is determined based on the number of RBs configured for the CORESET associated with the MO and a second predefined rule.

[0079] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, the first predefined rule includes reducing the number of symbols configured for the CORESET associated with the MO; and / or the second predefined rule includes increasing the number of RBs configured for the CORESET associated with the MO.

[0080] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to a transmission with an NCP overlapping with an ECP resource, the transmission is determined to be one of: dropped from the transmission, punctured for transmission in resources without the overlapping portion, or rate matched around the overlapping portion for transmission.

[0081] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to a transmission with an NCP overlapping with an ECP resource, the transmission is determined to change the frequency and / or time position of the scheduled resources used for the transmission according to a third predefined rule.

[0082] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, a third predefined rule includes changing the frequency and / or time position of the scheduled resources used for the transmission based on a frequency offset and / or time offset to avoid overlapping with ECP resources.

[0083] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to a transmission with an ECP overlapping with an NCP resource, the transmission is determined to change the frequency and / or time position of the scheduled resources used for the transmission according to a fourth predefined rule.

[0084] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, a fourth predefined rule includes changing the frequency and / or time position of the scheduling resources used for the transmission based on a frequency offset and / or time offset to avoid overlapping with NCP resources.

[0085] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to a transmission having an NCP being located within an ECP resource, a time domain position of a demodulation reference signal (DMRS) for the transmission is determined according to a rule for determining a DMRS position for a transmission in an NCP resource.

[0086] In some embodiments, in addition to part, all, or any combination of one or more embodiments / examples described, in response to a transmission with an ECP being located within an NCP resource, a time domain position of a demodulation reference signal (DMRS) for the transmission is determined according to a rule for determining a DMRS position for the transmission in the ECP resource.

[0087] The present disclosure describes various embodiments regarding the following items: how to configure or define resources for ECP for broadcast and / or multicast transmission, and how to configure PDCCH monitoring information shared between different parameter sets (e.g., ECP and NCP); how to transmit information on time domain resources with different CP types or different SCSs. In various embodiments, a method for type 1 feedback codebook generation is described when both ECP resources and NCP resources exist in one time slot. The present disclosure is associated with the following benefits: system resources that introduce ECP resources into NCP BWP or mix resources with different parameter sets can be effectively utilized.

[0088] Embodiment Set I

[0089] This disclosure describes various embodiments of configuring ECP resources for broadcast transmissions.

[0090] In an embodiment of the first method (method 1), resources with different CP types are time division multiplexed (TDMed); and / or, the frequency domain range of the ECP resources is the same as the frequency domain range of the broadcast CFR.

[0091] In some embodiments, the ECP resources are determined in the time domain by excluding some time domain resources having predefined attributes or used for predefined transmissions. For example, at least one of the predefined attributes or predefined transmissions may be defined as the following items: UL resources, flexible resources configured by cell-specific frame structure configuration signaling, SSB resources indicated by RRC signaling, CORESET#0 associated with type 0-PDCCH common search space, CORESET#0 associated with common search space configured by SIB1, MO determined according to common CORESET and common search space configured by SIB1 and associated with at least one SSB, time slot of CORESET#0 associated with common search space configured by SIB1, time slot of CORESET#0 associated with type 0-PDCCH common search space, time slot of MO determined according to common CORESET and common search space configured by SIB1 and associated with at least one SSB.

[0092] Figure 5A A non-limiting example is shown, where the ECP resource is determined by excluding the SSB resource and the CORESET#0 resource. The ECP resource has the same frequency range in the frequency domain as the CFR in the frequency domain; and the ECP resource is TDMed in the time domain with other resources having NCP.

[0093] In some embodiments, a first time domain interval (T1) is defined for switching from NCP to ECP. When the ECP resource is after the NCP resource, the ECP resource may start T1 after the end of the NCP resource, i.e., the first symbol of the ECP resource starts T1 after the last symbol of the NCP resource. The first time domain interval T1 may be used by the UE to switch the reception mode from NCP to ECP, or by the gNB to switch the transmission mode from NCP to ECP. Here, the "first" symbol of the ECP resource may refer to the "earliest" symbol of the ECP resource.

[0094] In some embodiments, a second time domain interval T2 is defined for switching from ECP to NCP. When the ECP resource precedes the NCP resource, the end of the ECP resource is no later than T2 before the start of the NCP resource, that is, the last symbol of the ECP resource ends T2 (or more than T2) earlier than the start of the first symbol of the NCP resource. That is, the second time domain interval T2 will be used by the UE to switch the reception mode from ECP to NCP, or by the gNB to switch the transmission mode from ECP to NCP. Here, the "first" symbol of the NCP resource can refer to the "earliest" symbol of the NCP resource.

[0095] In some implementations, the first time domain interval T1 may be equal to the second time domain interval T2. That is, only one time domain interval T is defined for switching between NCP and ECP.

[0096] In some embodiments, the ECP resources are configured via RRC signaling (e.g., SIB1). For example, the time domain resources are configured by using a period, an offset, and a duration. Figure 5B As shown, the duration of the ECP is 3 time slots, and the ECP resources of 3 time slots may appear once every 10 time slots, that is, the period is 10 time slots. The ECP resources start from the third time slot of each period (i.e., offset). In some embodiments, the time domain resources can also be configured according to at least one of a frame, a subframe, a half frame, a millisecond (ms), etc. In some embodiments, the period of the time domain resources is equal to the period of the frame structure. In some embodiments, the time domain resources are configured within the flexible resources.

[0097] In some implementations, the frequency domain range of the ECP resource is equal to the bandwidth of the CFR.

[0098] In some embodiments, the time domain resources or patterns of the ECP resources can be configured according to the period and the bitmap within the period. For example, the period is 10 time slots, and a 10-bit bitmap is further used to indicate which time slots are ECP time slots. That is, each bit of the bitmap indicates the CP type of a time slot of the period. The mapping relationship between the bits in the bitmap and the time slots within the period is predefined. For example, the first bit is mapped to the first time slot within the period. And the second bit is mapped to the second time slot within the period. Figure 5B In the example shown, the cycle is configured as 10 time slots, and a bitmap of '00111 000000' is used to indicate the CP type of each time slot in the cycle, where '1' indicates ECP and '0' indicates NCP. Here, the 'first' bit of the bitmap may refer to the leftmost / most significant bit of the bitmap, and the 'first' time slot in a cycle may refer to the 'earliest' time slot in the cycle.

[0099] In some implementations, the configured ECP resources may exclude some time domain resources that have predefined attributes or are used for predefined transmissions (eg, as described above).

[0100] In such Figure 5C In some of the illustrated implementations, when there are resources that should be excluded from the ECP window, the time domain interval is also excluded from the ECP window.

[0101] In another embodiment (method 2), resources with different CP types may be frequency division multiplexed (FDMed).As a non-limiting example, an ECP CFR may be defined, and there may be at most two CFRs for broadcast reception, one being an ECPCFR and the other being an NCP CFR.

[0102] In some embodiments, Figure 5D As shown, the frequency range of the ECP CFR is defined by excluding the initial DL BWP from the CFR configured in the system information. For example, the initial DL BWP may be the initial DL BWP defined by CORESET#0, that is, the bandwidth of the initial DL BWP is equal to the bandwidth of CORESET#0. In some embodiments, the frequency range of the initial DL BWP may be configured via SIB1.

[0103] In some embodiments, the frequency range of the ECP CFR is configured via system information. For example, the frequency range of the ECP CFR can be configured based on a frequency reference point (eg, point A or the lowest resource element (RE) or resource block (RB) of the NCP CFR).

[0104] In some embodiments, the frequency range of the ECP CFR may be outside the initial DL BWP.

[0105] In some implementations, a frequency guard band is defined between the ECP resources and the NCP resources.

[0106] In another embodiment (method 3), ECP resources are defined in both time and frequency domains by excluding some resources or via signaling.

[0107] In some embodiments, Figure 5E As shown, in the time domain, some resources with predefined attributes or used for predefined transmission are excluded from the ECP resources, and in the frequency domain, the frequency range of the initial DL BWP is excluded from the ECP resources. Then, the remaining resources are defined as ECP resources.

[0108] In some embodiments, the time-domain resources of the ECP resources are configured via signaling, while the frequency-domain resources of the ECP resources are defined by excluding some predefined resources (e.g., the initial DL BWP).

[0109] In some embodiments, both the time-domain resources and the frequency-domain resources of the ECP resources are configured via signaling. In some embodiments, some predefined resources should be excluded in at least one of the time domain or the frequency domain of the configured ECP resources.

[0110] In some embodiments, the time-domain resources of the ECP resources are defined by excluding some predefined resources, while the frequency-domain resources of the ECP resources are configured via signaling.

[0111] Various embodiments provide methods for configuring or defining ECP resources for multicast and / or broadcast transmissions, improving the effective utilization of system resources.

[0112] Embodiment Set II

[0113] Various embodiments in the present disclosure describe methods for configuring ECP resources for multicast transmissions.

[0114] In some embodiments, as Fig. 6A shown, the multicast CFR can be configured within the activated DL BWP associated with the multicast CFR. A UE can be configured with more than one DL BWP (e.g., a UE can be configured with 4 DL BWPs), and only one of the more than one DL BWPs can be activated at a time. For one configured DL BWP, at most one CFR can be configured for multicast transmission. Therefore, more than one CFR can be configured for the UE, but at this time only one CFR associated with the activated DL BWP can be used to receive multicast services. When the activated DL BWP switches to another, the CFR can be switched accordingly.

[0115] In some embodiments, to support multicast transmissions with ECP, the time-domain resources and / or the time-domain pattern are configured as ECP resources. The frequency range of the ECP resources can be equal to the bandwidth of the CFR.

[0116] In some embodiments, the subcarrier spacing of the CFR and the subcarrier spacing of the activated DL BWP associated with the CFR can be the same, while the CP type can be different. In some embodiments, the CP type of the activated DL BWP can be only NCP. The CP type of the associated CFR can be at least one of ECP and NCP.

[0117] In some embodiments, within the activated DL BWP and the resources FDMed with the ECP resources ( Fig. 6A602 and 604 in FIG. 604 can be regarded as reserved resources and are not used for transmitting data. In some other implementations, the resources can also be used for data transmission with NCP.

[0118] This disclosure describes various ways to configure the frequency range of ECP resources.

[0119] In some embodiments, cell-specific signaling (eg, signaling in system information) may be used to configure the first frequency range for the ECP resource. In addition, the intersection of the frequency domain range of the CFR and the first frequency range is defined as the ECP frequency resource.

[0120] As Figure 6B In the non-limiting example shown in , there are three CFRs in the carrier, and the three CFRs, i.e., the first CFR, the second CFR, and the third CFR, are configured to the UE. The first frequency range can be configured in the carrier, as shown in the box with a thicker line. The second CFR and the third CFR are located in the first frequency range, i.e., the intersection of the CFR and the first frequency range is the second CFR and the third CFR. Therefore, the frequency range of the ECP resource includes the second CFR and the third CFR; and for the first CFR, the first CFR is an NCP resource, that is, a CFR for multicast transmission with NCP.

[0121] In some implementations, not all subcarrier spacings (SCSs) support ECP. Therefore, when the SCS of a CFR in the first frequency range does not support ECP, the CFR may be defined as an NCP resource.

[0122] In some implementations, the CP type is configured for each CFR. More specifically, the CP type of a CFR may be configured independently of the activated DL BWP associated with the CFR.

[0123] In some embodiments, for unicast transmission within an activated DL BWP of 15kHz, only NCP is supported. There is no need to indicate the CP type for the activated DL BWP, and it defaults to NCP. In addition, the CP type of the CFR associated with the activated DL BWP can be configured. When the CP type of the CFR is configured as ECP, it means that all resources within the CFR are ECP. Alternatively, it means that at least a portion of the resources within the CFR are ECP, for example, some time domain resources of the CFR are ECP, and other time domain resources are NCP.

[0124] In some embodiments, when the CP type of a CFR is configured as NCP, it means that there are no ECP resources in the CFR or all resources in the CFR are ECP resources. In some embodiments, the time domain pattern of ECP resources can be configured for the CFR associated with the activated DL BWP. When the time domain pattern does not exist, it means that all resources of the CFR are NCP. Alternatively, it means that the CP type of the CFR is the same as the CP type of the associated DL BWP.

[0125] In some embodiments, at the first SCS (e.g., 60kHz), both ECP and NCP may be supported for unicast transmission. Then, there may be an indication of the CP type of the activated DL BWP. The CP type of the CFR associated with the activated DL BWP may follow the CP type of the activated DL BWP.

[0126] In some embodiments, at the second SCS (e.g., 15kHz), only one type of CP may be supported for unicast transmission, or there may be an indication of the CP type of the activated DL BWP. There may be another signaling to indicate whether the CP type is the same as the CP type of the activated DL BWP. For example, when the signaling exists, it means that the CP type of the CFR is different from the CP type of the associated activated DL BWP; and / or when the signaling does not exist, it means that the CP type of the CFR is the same as the CP type of the associated activated DL BWP. In some other examples, the signaling may have two values: one value indicates that the CP type of the CFR is different from the CP type of the associated activated DL BWP; and / or another value indicates that the CP type of the CFR is the same as the CP type of the associated activated DL BWP. In some other examples, the signaling may have two values: one value indicates that the CP type of the CFR is ECP; and / or another value indicates that the CP type of the CFR is NCP.

[0127] In some embodiments, for CFR with ECP resources, the time domain pattern can be configured to indicate which time domain resources are ECP and which time domain resources are NCP. In some embodiments, this configuration only applies to resources configured as flexible resources by semi-static frame structure configuration signaling. In some embodiments, the frame structure can also be configured for ECP resources.

[0128] Various embodiments of the present disclosure provide some methods for configuring or defining resources of ECP for multicast transmission, thereby improving the effective utilization of system resources.

[0129] Embodiment Set III

[0130] Various embodiments in this disclosure describe methods for configuring PDCCH monitoring information shared between different parameter sets (eg, ECP and NCP).

[0131] In some embodiments, the PDCCH monitoring information is defined by a control resource set (CORESET) and a search space set. The network configures one or more search space sets for the UE. The configuration parameters of the search space set include one, part or all of the following: search space index, associated CORESET index, PDCCH monitoring period and offset, search space duration, PDCCH monitoring pattern in a time slot, search space type, etc. In general, there are two types of search spaces, UE-specific search space (USS) and common search space (CSS). The search space type can also indicate the downlink control information (DCI) format monitored by the UE. The search space set is associated with the CORESET. The PDCCH monitoring period and offset indicate the time slots in which the UE needs to monitor the PDCCH. According to the search space set configuration and the associated CORESET configuration, the UE can be configured to monitor the corresponding PDCCH with the DCI format indicated by the search space type on the resources indicated by the CORESET, in the time slots indicated by the PDCCH monitoring period and offset.

[0132] In some embodiments, Fig. 7A A diagram illustrating an example of the configuration of a PDCCH Monitoring Opportunity (MO) is shown. A total of 8 slots are shown (represented by slot 0 to slot 7). The PDCCH monitoring period is 4 slots and the offset is 0. The search space duration is 2 slots. 2 PDCCH Monitoring Opportunities (MO) are configured in one slot. Therefore, there can be a total of 4 MOs in one PDCCH monitoring period. On each MO, there can be a resource configured by the CORESET for the UE to monitor the PDCCH.

[0133] In a wireless communication system, there are one or more PDCCH candidates in an MO. Each PDCCH candidate has a PDCCH candidate index. PDCCH consists of one or more control channel elements (CCE). Each CCE has a CCE index.

[0134] In some embodiments, different resources within a BWP may be defined as different CP types or different SCSs. MOs configured by the same configuration of the search space set and CORESET may be located within resources with different CP types or different SCSs, and these MOs may also be defined as MOs for monitoring PDCCHs with different CP types or different SCSs. Figure 7B A non-limiting example is shown in FIG, where there are 8 time slots (time slot 0 to time slot 7), and time slot 3 to time slot 5 are ECP resources. The monitoring period is 2 time slots, and 4 MOs (MO#1 to MO#4) are located in time slot 0, time slot 2, time slot 4, and time slot 6, respectively. MO#3 is located in the ECP resource, and MO#3 is an ECP MO for monitoring PDCCH with ECP. MO#1, MO#2, and MO#4 are NCP MOs, and MO#1, MO#2, and MO#4 are used to monitor PDCCH with NCP.

[0135] In some embodiments, the number of symbols in the ECP slot (12, i.e., symbol #0 to symbol #11) is 2 less than the number of symbols in the NCP slot (14, i.e., symbol #0 to symbol #13); and when the starting symbol of the MO is configured according to the NCP slot, the MO may exceed the ECP slot range. As a non-limiting example, when the parameter 'PDCCH monitoring pattern within the slot' is set to {0000000 0000100}, i.e., the starting symbol index is symbol #11, and when the duration of the associated CORESET is greater than 1 (e.g., 2), the MO may occupy symbol #11 and symbol #12, which exceeds the symbol range in the ECP slot. In some embodiments, such MO with any symbol outside the ECP slot range is defined as invalid. In other words, the UE will not monitor the PDCCH in the ECP slot. In some other embodiments, the symbols of the MO that exceed the ECP slot range are removed so that the remaining symbols form one MO. In the aforementioned example, the MO in the ECP slot is reduced to one symbol, ie, symbol #11. In some other embodiments, the UE does not expect the configured MO to exceed the symbol range of the ECP slot.

[0136] In some embodiments, when the MO is located in the ECP slot, the number of symbols of the MO, i.e., the duration of the CORESET, can be changed according to a predefined rule. As a non-limiting example, when the configured duration of the CORESET is 3 symbols, and when the MO is located in the ECP slot, the number of symbols can be changed from 3 to 2.

[0137] In some embodiments, when the MO is located in the ECP time slot, the number of RBs of the MO, i.e., the number of RBs of the CORESET, can be changed according to a predefined rule. As a non-limiting example, when the configured number of RBs of the CORESET is 48 RBs, and when the MO is located in the ECP time slot, the number of RBs can be changed from 48 to 96.

[0138] Various embodiments provide methods for configuring PDCCH monitoring information shared between different parameter sets (eg, ECP and NCP), thereby improving the effective utilization of system resources.

[0139] Embodiment Set IV

[0140] Various embodiments in this disclosure describe methods of how to transmit information on time domain resources with different CP types or different SCSs.

[0141] In some embodiments, for some transmissions, such as PDSCH repetition, SPS PDSCH, multiple PDSCHs scheduled by a single DCI, transmission block over multiple slots (TBoMS), and / or periodic / semi-persistent CSI-RS, they may occupy different types of resources.

[0142] In some embodiments, taking PDSCH repetition as an example, the repetition factor can be configured via RRC signaling or indicated by DCI. PDSCH can be repeatedly transmitted on multiple time slots. Some of these time slots can be time slots with a first CP type (e.g., NCP), while other time slots can be time slots with a second CP type (e.g., ECP). Some rules can be defined on how to transmit the same information on multiple time slots with different time slot types (e.g., different CP types or different SCSs).

[0143] In some embodiments, Fig. 8AAs shown, unicast (e.g., 802 and 804) does not support ECP, that is, BWP is configured or defined as NCP resources, and some time domain resources of CFR associated with BWP are configured as ECP resources. When unicast transmission (such as SPS PDSCH, PDSCH repetition and TBoMS) falls into the time slot where ECP resources exist (e.g., a part of 804 overlaps with a part of ECP resources), it may not be possible to ensure that the complete PDSCH is sent. In some embodiments, the unicast transmission of the dotted line is discarded, that is, the entire unicast PDSCH 804 is discarded and may not be transmitted. In some embodiments, the unicast transmission of the dotted line can be punctured, that is, the overlapping part of the unicast 804 is punctured and may not be transmitted. In some embodiments, the unicast transmission of the dotted line can be rate matched with the ECP resource, that is, the information in the original unicast PDSCH is encoded by a higher coding rate to match the unicast PDSCH part that does not overlap with the ECP. In some embodiments, the frequency domain position can be changed by using a predefined rule for transmission. As a non-limiting example, the frequency domain position of the unicast transmission may be changed based on the frequency domain offset so that it does not overlap with resources having a first CP type (e.g., ECP), or the FDRA (Frequency Domain Resource Allocation) field is reinterpreted to indicate resources that do not overlap with resources having a first CP type (e.g., ECP). In some embodiments, the time domain position may be changed for transmission using a predefined rule. As a non-limiting example, the time domain position of the unicast transmission may be changed based on the time domain offset so that it does not overlap with ECP resources, or the TDRA (Time Domain Resource Allocation) field is reinterpreted to indicate resources that do not overlap with ECP resources.

[0144] In some embodiments, Figure 8BAs shown, multicast transmissions (812 and 814) are scheduled or configured on different time slot types (e.g., CP type or SCS). The first transmission (812) is located in the NCP time slot, and the subsequent transmission (dashed line, 814) is located in the ECP time slot. In some embodiments, the entire subsequent transmission (814) may be discarded. In some embodiments, in the subsequent transmission (814), the portion of the transmission that exceeds the ECP time slot range can be discarded, that is, the portion of the transmission that exceeds the ECP time slot range can be punctured. In a non-limiting example, more specifically, the time domain resources are allocated to 7 symbols, that is, from symbol #7 to symbol #13, the encoding can be performed based on the configured resources (i.e., 7 symbols), and the mapping can be performed based on the available resources (i.e., 5 symbols, from symbol #7 to symbol #11). In some embodiments, for the subsequent transmission (814), the transmission can be performed in a rate-matched manner. That is, the encoding and mapping can be performed based on the available resources in the ECP time slot.

[0145] In some implementations, the time domain location of the DMRS of the scheduled or configured transmission may follow the rules of the first CP type (eg, NCP) even if the actual transmission is in a time slot with the second CP type (eg, ECP).

[0146] In some implementations, the time domain location of the DMRS of a scheduled or configured transmission may follow the rules of the specific CP type in which the scheduled or configured transmission resides.

[0147] In some implementations, a UE may determine whether to receive transmissions in time slots having different CP types (eg, ECP) ​​based on the capabilities of the UE.

[0148] In some embodiments, the gNB may configure the UE whether to receive a transmission in a timeslot having a different CP type than the CP type of the first timeslot in which the transmission is located. Alternatively, the gNB may configure the UE whether to send a transmission in a timeslot having a different CP type than the CP type of the first timeslot in which the transmission is located.

[0149] In some embodiments, Figure 8C As shown, multicast transmissions (822 and 824) are scheduled or configured on different time slot types (e.g., CP types or SCS). The first transmission (822) is in a time slot with a first CP type (e.g., ECP); and the subsequent transmission (824) is in a time slot with a second CP type (e.g., NCP). In some embodiments, the subsequent transmission in the time slot of the second CP type can be discarded.

[0150] In some embodiments, the time domain position of the DMRS of the scheduled or configured transmission may follow the rules of the first CP type even if the actual transmission is in a time slot with the second CP type. In some examples, the time domain position of the DMRS of the scheduled or configured transmission may follow the rules of the specific CP type in which the scheduled or configured transmission is located.

[0151] In some implementations, the UE may determine whether to receive transmissions in the NCP timeslot based on the capabilities of the UE.

[0152] In some embodiments, the gNB may configure the UE whether to receive transmissions in NCP time slots. Alternatively, the gNB may configure the UE whether to transmit transmissions in NCP time slots.

[0153] Various embodiments provide methods for transmitting information on time domain resources with different CP types or different SCSs, thereby improving the effective utilization of system resources.

[0154] Embodiment Set V

[0155] Various embodiments in this disclosure describe methods for feedback codebook generation.

[0156] In some embodiments, for type 1 feedback codebook generation, the amount of feedback bits for a time slot depends on the amount of start and length indicator value (SLIV) groups, that is, one SLIV group corresponds to one or more feedback bits. The SLIV groups are divided based on a configured or default time domain resource allocation list or table. Specifically, the time domain resource allocation list or table includes all possible time domain resource allocations, i.e., for the timing of candidate PDSCH reception, and the current time domain resource allocation can be indicated from the time domain resource allocation list via the TDRA field in the scheduling DCI. In existing systems, all timings for candidate PDSCH reception can be divided into one or more SLIV groups according to predefined rules.

[0157] In some embodiments, as a non-limiting example, a set including all opportunities for candidate PDSCH reception may be defined by some or all of the following steps.

[0158] Step 1: The first opportunity with the smallest last OFDM symbol is selected from the set. Any other opportunities (e.g., (multiple) second opportunities) whose starting OFDM symbol is not later than the last OFDM symbol of the first opportunity may also be selected, i.e., all second opportunities overlap with the first opportunity. Then, the first opportunity and the second opportunity may form a first SLIV group.

[0159] Step 2: Exclude the first opportunity and the second opportunity from the set.

[0160] Step 3: Repeat step 1, and select another first opportunity and a second opportunity overlapping with the other first opportunity from the remaining opportunities in the set after step 2. Then, a second SLIV group is formed.

[0161] Step 4: Repeat steps 2 and 3 until the set is empty.

[0162] Fig.9A A non-limiting example is shown in which there is a time slot with 14 NCP symbols. A set with 7 opportunities for PDSCH reception is defined according to a time domain resource allocation list or table. Opportunity 2 is selected because Opportunity 2 has the smallest last OFDM symbol, i.e., symbol 4. Opportunity 1 and Opportunity 3 are further selected because the starting symbol (symbol 2 and symbol 4) of each opportunity in Opportunity 1 and Opportunity 3 is not later than the last OFDM symbol of Opportunity 2. Opportunity 1, Opportunity 2, and Opportunity 3 form a first SLIV group. The above opportunities (1, 2, 3) are excluded from the set, and the above steps are repeated. In some embodiments, Opportunity 4, Opportunity 5, and Opportunity 6 form a second SLIV group, and Opportunity 7 forms a third SLIV group.

[0163] In some embodiments, for UEs that do not support FDM reception of PDSCH transmissions, at most one PDSCH can be received in a SLIV group, and thus the SLIV group corresponds to one feedback bit. Fig.9A As shown, 3 bits are required. For a UE supporting FDM reception of PDSCH transmission, the amount of feedback bits corresponding to a SLIV group is determined according to the capability of the UE, that is, according to the maximum amount of FDMed PDSCH that the UE can receive.

[0164] In some embodiments, there are both ECP resources and NCP resources. The ECP resources and the NCP resources are either FDMed to each other or TDMed to each other. Considering that a switching time (e.g., N symbols) is required between the UE receiving the ECP PDSCH and the UE receiving the NCP PDSCH. The switching time can be defined by the number of ECP symbols or the number of NCP symbols. Alternatively, the switching time can also be defined as an absolute time interval. Therefore, when generating the type 1 feedback codebook and dividing the SLIV groups, the above switching time needs to be considered.

[0165] In some embodiments, a set may be defined to include all opportunities for candidate PDSCH reception, including ECP opportunities and NCP opportunities.

[0166] Step 1: Select the first opportunity with the smallest last OFDM symbol from the set. When the symbol index of the smallest last OFDM symbol is 'M', the second opportunity can be further selected according to the following items: for any other opportunity with a different CP type from the first opportunity, when the starting OFDM symbol of the opportunity is not later than the symbol indexed as 'M+N', the opportunity can be further selected; and / or for any other opportunity with the same CP type as the first opportunity, when the starting OFDM symbol of the opportunity is not later than the symbol indexed as 'M+N', the opportunity can be further selected.

[0167] In some implementations, the first opportunity and the second opportunity(s) can form a first SLIV group.

[0168] Step 2: Exclude the first opportunity and the second opportunity from the set.

[0169] Step 3: Repeat step 1, and select another first opportunity and second opportunity from the remaining opportunities in the set after step 2. Then, a second SLIV group is formed.

[0170] Step 4: Repeat steps 2 and 3 until the set is empty.

[0171] Fig. 9B A non-limiting example is shown in which NCP resources and ECP resources are TDMed. That is, the first seven symbols of the time slot are NCP symbols. The remaining resources are configured as six ECP symbols. For NCP symbols, there are three opportunities, namely, opportunity 1, opportunity 2, and opportunity 3. For ECP symbols, there are four opportunities, namely, opportunity 4 to opportunity 7. Opportunities with different CP types can have separate time domain resource allocation lists or tables. When the switching time N=3 in each NCP symbol, opportunity 2 is selected first. Opportunity 1, opportunity 3 and opportunity 4 can also be further selected. Among them, the CP type of opportunity 4 is different from that of opportunity 2, and is no later than symbol 7 (M+N=4+3=7), so opportunity 4 belongs to the same SLIV group as opportunity 2. Opportunities 5 to 7 form another SLIV group.

[0172] Fig. 9C Another non-limiting example is shown in , where the NCP resource and the ECP resource are FDMed. For PDSCH reception in the NCP resource, there may be five opportunities, namely, NCP opportunity 1 to NCP opportunity 5; and for PDSCH reception in the ECP resource, there may be four opportunities, namely, ECP opportunity 1 to ECP opportunity 4. The NCP opportunity and the ECP opportunity may form a set for PDSCH reception. In some embodiments, the switching time N is 3 symbols in the NCP.

[0173] In some embodiments, NCP opportunity 2 with the smallest last symbol (symbol 4 in NCP) is first selected. Then, NCP opportunity 1, ECP opportunity 1, and ECP opportunity 2 are further selected to form a first SLIV group. The above opportunities (NCP opportunity 1, NCP opportunity 2, ECP opportunity 1, and ECP opportunity 2) are excluded from the set, and the above method can be performed for the remaining opportunities. NCP opportunity 3, NCP opportunity 4, and ECP opportunity 3 form a second SLIV group. NCP opportunity 5 and ECP opportunity 4 form a third SLIV group.

[0174] In the case where both ECP resources and NCP resources exist in a time slot, various embodiments provide a method for generating a type 1 feedback codebook, thereby improving the effective utilization of system resources.

[0175] The present disclosure describes methods, apparatus, and computer-readable media for wireless communications. The present disclosure addresses the topic of configuring an extended cyclic prefix (ECP) for broadcast and / or multicast transmissions. The methods, devices, and computer-readable media described in the present disclosure can facilitate the performance of wireless communications, thereby improving efficiency and overall performance. The methods, devices, and computer-readable media described in the present disclosure can improve the overall efficiency of a wireless communication system.

[0176] In some other embodiments, a computer-readable medium includes instructions, which, when executed by a computer, cause the computer to perform the above method. Computer-readable media may be referred to as non-transient computer-readable media (computer-readable media, CRM), which can store data for a long time, such as a flash drive or a compact disk (CD); or it can store data for a shorter time when there is power, such as a memory device or a random access memory (random access memory, RAM). In some embodiments, computer-readable instructions may be included in software, which is embodied in one or more tangible, non-transient computer-readable media. Such non-transient computer-readable media may be a medium associated with a user-accessible mass storage device, or a medium associated with a specific short-duration storage device (such as an internal mass storage device or ROM) having a non-transient property. The software implementing various embodiments of the present disclosure may be stored in such devices and executed by a processor (or processing circuit). According to specific needs, the computer-readable medium may include one or more storage devices or chips. The software can cause a processor (including a CPU, GPU, FPGA, etc.) to perform a specific process or a specific part of a specific process described herein, including defining data structures stored in RAM and modifying such data structures according to the process defined by the software.

[0177] References throughout this specification to features, advantages, or similar language do not imply that all of the features and advantages that can be realized with the present solution should be included or are included in any single embodiment thereof. Rather, the language referring to these features and advantages is understood to mean that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, the discussions of these features and advantages and similar language throughout this specification may, but do not necessarily, refer to the same embodiment.

[0178] Further, in one or more embodiments, the features, advantages, and characteristics of the present solution may be combined in any suitable manner. By way of non-limiting example, a portion in one or more embodiments may be combined with another portion in other embodiments. Those of ordinary skill in the relevant art will recognize that, in light of the description herein, the present solution may be practiced without one or more particular features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized that may not be present in all embodiments of the present solution.

Claims

1. A method for wireless communication, include: determining, by a user equipment (UE), an extended cyclic prefix (ECP) resource for at least one of a broadcast transmission and a multicast transmission based on predefined resources; as well as A broadcast transmission or a multicast transmission is received by the UE from a base station in the ECP resources.

2. A method for wireless communication, include: configuring, by the base station, an extended cyclic prefix (ECP) resource for at least one of broadcast transmission and multicast transmission according to predefined resources; as well as A broadcast transmission or a multicast transmission is transmitted by the base station to at least one UE in the ECP resources.

3. The method according to any one of claims 1 to 2, in: The ECP resources are determined in the time domain by excluding predefined resources in the time domain.

4. The method according to claim 3, in: The ECP resource comprises the same frequency range as the broadcast common frequency resource (CFR); or The ECP resources and normal cyclic prefix (NCP) resources are time division multiplexed (TDMed).

5. The method according to claim 3, in: The predefined resources include resources having predefined attributes or used for predefined transmission, and the resources include at least one of the following: uplink resources, flexible resources configured by radio resource control (RRC) signaling, synchronization signal block (SSB) resources indicated by RRC signaling, a monitoring opportunity (MO) determined according to a control resource set (CORESET#0) with an index of zero and a physical downlink control channel (PDCCH) common search space of type 0, an MO determined according to CORESET#0 and a common search space configured by a system information block (SIB), an MO determined according to a common control resource set (CORESET) and a common search space configured by the SIB and associated with at least one SSB, a time slot including an MO determined according to CORESET#0 and a common search space configured by the SIB, a time slot including an MO determined according to CORESET#0 and a PDCCH common search space of type 0, or a time slot including an MO determined according to a common CORESET and a common search space configured by the SIB and associated with at least one SSB.

6. The method according to claim 3, in: In response to the ECP resource being after the NCP resource in the time domain, a first symbol of the ECP resource starts at a first time interval after an end of the NCP resource; or In response to the ECP resource preceding the NCP resource in the time domain, the ECP resource ends no later than a second time interval before a first symbol of the NCP resource.

7. The method according to claim 6, in: The first time interval and the second time interval have the same value.

8. The method according to claim 3, in: The ECP resource is configured in the time domain via RRC signaling, the RRC signaling including one of: a period, an offset, and a duration; Or a period and a bitmap corresponding to the period.

9. The method according to claim 3, in: The ECP resource is further determined in the time domain to be within a configured ECP window in the time domain.

10. The method according to any one of claims 1 to 2, in: The ECP resources are determined in the frequency domain by excluding predefined resources in the frequency domain; and The predefined resources include an initial downlink (DL) bandwidth part (BWP).

11. The method according to claim 10, in: The ECP resource includes the same time range as the broadcast CFR; or The ECP resources and the normal cyclic prefix (NCP) resources are frequency division multiplexed (FDMed).

12. The method according to claim 10, in: The ECP resources are configured in the frequency domain via system information.

13. The method according to any one of claims 1 to 2, in: The ECP resources are determined in the time domain and the frequency domain by excluding predefined resources; The ECP resources are configured in the time domain via RRC signaling and the ECP resources are determined in the frequency domain by excluding predefined resources; The ECP resources are configured via RRC signaling in the time domain and the frequency domain; or The ECP resources are determined in the time domain by excluding predefined resources and the ECP resources are configured via RRC signaling in the frequency domain.

14. The method according to any one of claims 1 to 2, in: The ECP resource is determined in the frequency domain according to a frequency range of a multicast common frequency resource (CFR) within a corresponding activated DL BWP and system information signaling including a first frequency range for the ECP resource.

15. The method according to claim 14, in: The ECP resource is determined based on overlapping frequency resources between at least one of the multicast CFRs and the first frequency range.

16. The method according to any one of claims 14 to 15, in: In response to a subcarrier spacing (SCS) of the multicast CFR within the first frequency range in the frequency domain not supporting ECP, the multicast CFP is determined as an NCP resource.

17. The method according to any one of claims 14 to 16, in: The CP type of each multicast CFR is configured via RRC signaling.

18. The method according to any one of claims 1 to 17, in: In response to the resources configured with the PDCCH MO having different CP types, the PDCCH MO is determined as MOs respectively used to monitor PDCCHs having different CP types; or In response to the resources configured with the PDCCH MO having different SCSs, the PDCCH MOs are determined as MOs respectively used to monitor PDCCHs having different SCSs.

19. The method according to any one of claims 1 to 17, in: In response to the MO being within the ECP resource, the number of symbols of the MO is determined according to a configured number of symbols of a CORESET associated with the MO and a first predefined rule; or In response to the MO being within the ECP resources, a number of resource blocks (RBs) of the MO is determined according to a configured number of RBs of a CORESET associated with the MO and a second predefined rule.

20. The method according to claim 19, in: The first predefined rule comprises reducing the number of symbols configured for the CORESET associated with the MO; or The second predefined rule includes increasing the number of configured RBs of the CORESET associated with the MO.

21. The method according to any one of claims 1 to 20, in: In response to a transmission having a first CP type overlapping resources having a second CP type, the transmission is determined to be one of: dropped from the transmission, punctured for transmission in a non-overlapping portion, or rate matched for transmission in an overlapping portion.

22. The method according to any one of claims 1 to 20, in: In response to a transmission having a first CP type overlapping with resources having a second CP type, the transmission is determined to change a position of scheduled resources for the transmission according to a predefined rule.

23. The method according to claim 22, in: The predefined rule includes changing a position of the scheduled resource for the transmission based on an offset in at least one of a time domain and a frequency domain to avoid overlapping with resources having the second CP type.

24. The method according to any one of claims 1 to 20, in: In response to a transmission having a first CP type being located within a resource having a second CP type, a time domain position of a demodulation reference signal (DMRS) for the transmission is determined according to a rule for determining a DMRS position for transmissions in resources having the first CP type.

25. A wireless communication device comprising a processor and a memory, in, The processor is configured to read code from the memory and implement the method according to any one of claims 1 to 24.

26. A non-transitory computer program product, comprising a computer-readable program medium on which codes are stored, which, when executed by a processor, cause the processor to implement the method according to any one of claims 1 to 24.

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