Group semi-persistent scheduling for path diversity

Abstract

Certain aspects of the present disclosure provide a group semi-persistent scheduling (SPS) technique for path diversity. A method that can be performed by a node includes: configuring one or more SPS resources for one or more groups of user equipment (UE). The node sends downlink control information (DCI) to activate one of the SPS resources for a group of UEs in multiple UEs, and sends data to the group of UEs using the activated SPS resources. A first UE can receive data from the node using the activated SPS resource and retransmit the data to a second UE. A first helper UE and a second target UE can be identified based on a higher layer configuration with SPS resources, based on information in the DCI, and / or based on information sent with the data.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Application No. 17 / 087,974, filed on November 3, 2020, which in turn claims priority to U.S. Provisional Application No. 62 / 930,939, filed on November 5, 2019, which has been assigned to the assignee of this application, and the entire contents of which are expressly incorporated herein by reference, as if fully set forth below. Technical Field

[0003]

[0006] Generally speaking, aspects of the disclosure relate to wireless communications, and more particularly, to techniques for access link and sidelink communications. Background Art

[0004] Wireless communication systems have been widely deployed to provide a variety of telecommunication services such as telephony, video, data, messaging, broadcasts, and the like. These wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and the like). Examples of such multiple access systems include third generation partnership project (3GPP) long term evolution (LTE) systems, LTE-Advanced (LTE-A) systems, code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a city-wide, national-wide, regional-wide, and even global scale. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an evolution of the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, making full use of new spectrum, and better integrating with other open standards using OFDMA and cyclic prefix (CP) on downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0006] However, as the demand for mobile broadband access continues to increase, there is a need to further improve NR and LTE technologies. Preferably, these improvements can also be applied to other multiple access technologies and communication standards that adopt these technologies. Summary of the invention

[0007] The systems, methods, and apparatus of the present disclosure all have aspects, no single one of which is solely responsible for its desirable attributes. The claims set forth below do not limit the scope of the present disclosure, and some features will now be briefly discussed. After careful consideration of this discussion, and particularly after reading the section entitled "Detailed Description of the Invention," one will understand how the features of the present disclosure have advantages, including: Path diversity with group semi-persistent scheduling (SPS).

[0008] One or more aspects of the present disclosure may be implemented using a method for wireless communication of a node. The method generally includes: configuring one or more semi-persistent scheduling (SPS) resources for one or more groups of user equipment (UE). The method generally includes: sending downlink control information (DCI) to activate one of the SPS resources for a group of UEs in the multiple groups of UEs. The method generally includes: using the activated SPS resource, sending data to the group of UEs.

[0009] One or more aspects of the present disclosure may be implemented using a method for wireless communication for a first UE. The method generally includes: receiving a configuration of one or more SPS resources for a group of UEs, the group of UEs including a first UE and a second UE. The method generally includes: receiving DCI from a node that activates one of the one or more SPS resources. The method generally includes: receiving data from the node using the activated SPS resource.

[0010] One or more aspects of the present disclosure may be implemented using a method for wireless communication for a second UE. The method generally includes: receiving a configuration of one or more SPS resources for a group of UEs, the group of UEs including the second UE and the first UE. The method generally includes: monitoring the one or more SPS resources for data transmission from a base station (BS).

[0011] One or more aspects of the present disclosure may be implemented using an apparatus for wireless communication. The apparatus generally includes a memory and at least one processor coupled to the memory. The memory and the processor are configured to: configure one or more SPS resources for one or more groups of UEs; send DCI to activate one of the SPS resources for a group of UEs in the multiple UEs; and use the activated SPS resource to send data to the group of UEs.

[0012] One or more aspects of the present disclosure may be implemented using a first device for wireless communication. The first device generally includes a memory and at least one processor coupled to the memory. The memory and the processor are configured to: receive a configuration of one or more SPS resources for a group of devices, the group of devices including a first device and a second device; receive DCI from a node that activates one of the one or more SPS resources; and receive data from the node using the activated SPS resource.

[0013] One or more aspects of the present disclosure may be implemented using a second device for wireless communication. The second device generally includes a memory and at least one processor coupled to the memory. The memory and the processor are configured to: receive a configuration of one or more SPS resources for a group of devices, the group of devices including the second device and the first device; and monitor the one or more SPS resources for data transmission from the BS.

[0014] One or more aspects of the present disclosure may be implemented using an apparatus for wireless communication. The apparatus generally includes: a unit for configuring one or more SPS resources for one or more groups of UEs; a unit for sending a DCI to activate one of the SPS resources for a group of UEs in the multiple groups of UEs; and a unit for sending data to the group of UEs using the activated SPS resources.

[0015] One or more aspects of the present disclosure may be implemented using a first device for wireless communication. The first device generally includes: a unit for receiving a configuration of one or more SPS resources for a group of devices, the group of devices including a first device and a second device; a unit for receiving a DCI from a node that activates one of the one or more SPS resources; and a unit for receiving data from the node using the activated SPS resource.

[0016] One or more aspects of the present disclosure may be implemented using a second device for wireless communication. The second device generally includes: a unit for receiving a configuration of one or more SPS resources for a group of devices, the group of devices including the second device and the first device; and a unit for monitoring the one or more SPS resources for data transmission from a BS.

[0017] One or more aspects of the present disclosure may be implemented using a computer-readable medium having computer executable code stored thereon for wireless communication. The computer-readable medium generally includes: code for configuring one or more SPS resources for one or more groups of UEs; code for sending a DCI to activate one of the SPS resources for a group of UEs in the multiple groups of UEs; and code for sending data to the group of UEs using the activated SPS resources.

[0018] One or more aspects of the present disclosure may be implemented using a computer-readable medium having computer executable code stored thereon for wireless communication. The computer-readable medium generally includes: code for receiving a configuration of one or more SPS resources for a group of UEs, the group of UEs including a first UE and a second UE; code for receiving DCI from a node that activates one of the one or more SPS resources; and code for receiving data from the node using the activated SPS resource.

[0019] One or more aspects of the present disclosure may be implemented using a computer-readable medium having computer executable code stored thereon for wireless communication. The computer-readable medium generally includes: code for receiving a configuration of one or more SPS resources for a group of UEs, the group of UEs including the second UE and the first UE; and code for monitoring the one or more SPS resources for data transmission from the BS.

[0020] To achieve the aforementioned and related purposes, one or more aspects include the features described in detail below and specifically pointed out in the claims. The following description and the accompanying drawings describe in detail certain exemplary features of one or more aspects. However, these features are only illustrative of some of the various ways in which the basic principles of these various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to understand in detail the implementation of the above-described features of the present disclosure, the present application provides a more specific description with reference to some aspects for the above brief summary, some of which are illustrated in the accompanying drawings. However, it should be noted that since the description of the present invention allows for other equally effective aspects, these drawings only depict some typical aspects of the present disclosure, which should not be considered to limit the scope of protection of the present invention.

[0022] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0023] Figure 2is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipments (UEs) in accordance with certain aspects of the present disclosure.

[0024] Figure 3 is an example frame format for certain wireless communication systems (e.g., New Radio (NR)) according to certain aspects of the present disclosure.

[0025] Figure 4 is a diagram illustrating exemplary access links and side links in accordance with certain aspects of the present disclosure.

[0026] Figure 5 is a diagram illustrating an exemplary blocked access link in accordance with certain aspects of the present disclosure.

[0027] Figure 6 is a diagram illustrating an exemplary blocked side link according to certain aspects of the present disclosure.

[0028] Figure 7 is a call flow diagram illustrating exemplary signaling for group semi-persistent scheduling (SPS) for path diversity in accordance with aspects of the present disclosure.

[0029] Figure 8 is a flow chart illustrating example operations for wireless communications of a BS in accordance with certain aspects of the present disclosure.

[0030] Fig. 9 is a flow chart illustrating example operations for wireless communications of a helping UE in accordance with certain aspects of the present disclosure.

[0031] Fig.10 is a flow chart illustrating example operations for wireless communications of a target UE in accordance with certain aspects of the present disclosure.

[0032] Fig.11 According to aspects of the present disclosure, a communication device is shown that may include various components configured to perform operations of the techniques disclosed herein.

[0033] Fig.12 According to aspects of the present disclosure, a communication device is shown that may include various components configured to perform operations of the techniques disclosed herein.

[0034] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It will be appreciated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation. DETAILED DESCRIPTION

[0035] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for group semi-persistent scheduling (SPS).

[0036] Some wireless communication systems (e.g., 5G New Radio (NR)) use sidelink communication between devices. Typically, sidelink communication may include communication between two or more subordinate wireless communication devices (e.g., user equipment (UE)) in a wireless communication network, and these two or more subordinate wireless communication devices do not need to communicate via another network entity (e.g., base station (BS)). Sidelink communication can allow path diversity and extended coverage. For example, in some cases, downlink transmission on the direct link between the BS and the UE, or the sidelink between the programmable logic controller (PLC) and the UE may be blocked. Link blocking may cause radio link failure, beam failure and / or transmission failure. Therefore, in some aspects, a sidelink may be used to retransmit downlink data to a UE that has not received an initial data transmission from a BS or PLC. A first UE (e.g., referred to herein as a helper UE) may retransmit data from a BS or PLC to a second UE (e.g., referred to herein as a target UE) that has not received the data. Even when the direct link between the target UE and the BS or PLC is blocked, the sidelink may provide a communication path between the target UE and the BS or PLC through a helper UE.

[0037] In order to enable such a communication path via a first UE between a BS or PLC and a second UE, various aspects of the present disclosure provide techniques and devices for scheduling communications along such a communication path. Specifically, certain aspects of the present disclosure provide techniques and devices for scheduling a group SPS for downlink data transmission for a group of UEs. For example, a common SPS resource may be a radio resource control (RRC) configured with a group identifier (ID). Downlink control information (DCI) carrying a group ID may be used to activate common SPS resources for UEs associated with the group ID so that the UE can monitor downlink data from the BS. Various aspects of the present disclosure provide techniques and devices for identifying a target UE for downlink data from a BS, and for identifying a first UE (e.g., a helper UE) that retransmits data to a second UE (e.g., a target UE). In some examples, the DCI also indicates a second UE ID to the first UE. In some examples, the first UE ID and the second UE ID are RRC configured. In some examples, the first UE ID is RRC configured, and the second UE ID is sent in the DCI, or sent together with the initial data transmission. Aspects of the present disclosure also provide techniques and apparatus for updating common SPS resources.

[0038] The following description provides an example of a group SPS for path diversity in a communication system, but it does not limit the scope of protection, applicability or examples set forth in the claims. Without departing from the scope of protection of the present disclosure, the functions and arrangements of the components discussed can be changed. Various examples can omit, replace or add various processes or components as needed. For example, the described method can be performed in a different order from that described, and various steps can be added, omitted or combined. In addition, the features described in some examples can be combined in other examples. For example, a device can be implemented or a method can be implemented using any number of aspects set forth herein. In addition, the scope of protection of the present disclosure is intended to cover such a device or method, which can be implemented by using other structures, functions, or structures and functions other than the various aspects of the present disclosure set forth herein or structures and functions different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more components of the present invention. The word "exemplary" used herein means "used as an example, illustration or description". Any aspect described as "exemplary" herein should not be interpreted as being more preferred or more advantageous than other aspects.

[0039] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as a radio technology, an air interface, etc. Frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.

[0040] The techniques described herein can be used for various wireless networks and radio technologies. Although various aspects are described herein using terms commonly associated with 3G, 4G and / or new radio (e.g., 5G NR) wireless technologies, various aspects of the present disclosure may also be applied to communication systems based on other generations.

[0041] NR access can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wider bandwidth (e.g., 80MHz or above), millimeter wave (mmW) targeting high carrier frequency (e.g., 25GHz or above), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0042] NR supports beamforming and can dynamically configure the beam direction. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support up to 8 transmit antennas with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE can be supported. Aggregation of multiple cells up to 8 serving cells can be supported.

[0043] Figure 1 An exemplary wireless communication network 100 is shown in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be a NR system (e.g., a 5G NR network). Figure 1 As shown in , the wireless communication network 100 can communicate with the core network 132. The core network 132 can communicate with one or more base stations (BSs) 110a-z (each also individually referred to as BS110 or collectively referred to as BS110 herein) and / or user equipments (UEs) 120a-y (each also individually referred to as UE 120 or collectively referred to as UE120 herein) in the wireless communication network 100 through one or more interfaces.

[0044] BS 110 may provide communication coverage for a particular geographic area, sometimes referred to as a "cell," which may be stationary or may move depending on the location of mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.). Figure 1In the example shown, BS110a, BS110b, and BS110c may be macro BSs for macro cell 102a, macro cell 102b, and macro cell 102c, respectively. BS110x may be a pico BS for pico cell 102x. BS110y and BS110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more cells. A network controller 130 may be coupled to a group of BSs 110 and provide coordination and control for these BSs 110. The network controller 130 may communicate with these BSs 110 via a backhaul.

[0045] BS 110 communicates with UEs 120a-y (each also individually referred to herein as UE 120 or collectively referred to as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be fixed or mobile. The wireless communication network 100 may also include a relay station (e.g., relay station 110r), also referred to as a repeater, etc., which receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of data and / or other information to a downstream station (e.g., UE 120 or BS 110), or relays transmissions between UEs 120 to facilitate communication between devices.

[0046] The network controller 130 may communicate with a set of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110. In various aspects, the network controller 130 may communicate with a core network 132 (e.g., a 5G core network (5GC)), which provides various network functions, such as access and mobility management, session management, user plane functions, policy control functions, authentication server functions, unified data management, application functions, network exposure functions, network repository functions, network slice selection functions, etc.

[0047] According to certain aspects, BS 110 and UE 120 may be configured for group SPS. Figure 1 As shown in FIG. 1 , BS 110a includes a group SPS manager 112. According to aspects of the present disclosure, group SPS manager 112 may configure UE 120a and UE 120b with common SPS resources and send a DCI to activate the resources. Figure 1 As shown in FIG. 1 , UE 120a includes a lateral link manager 122a. According to aspects of the present disclosure, lateral link manager 122a may be configured to receive common SPS resource configuration, DCI, and initial data transmission from BS 110a, and retransmit the data to UE 120b. Figure 1As shown in FIG. 1 , UE 120b includes a lateral link manager 122b. The lateral link manager 122b may be configured to receive a group SPS configuration from BS 110a; monitor SPS resources for data transmissions from BS 110a; and receive retransmissions from UE 120a.

[0048] Figure 2 Exemplary components of BS 110a and UE 120a are shown (eg, in Figure 1 In the wireless communication network 100), they can be used to implement aspects of the present disclosure.

[0049] At BS110a, the transmit processor 220 may receive data from the data source 212 and control information from the controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. A medium access control (MAC) control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. For example, BS110a may send a MAC-CE to UE 120a to cause UE 120a to enter a discontinuous reception (DRX) mode to reduce power consumption of the UE. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH). The MAC-CE may also be used to convey information that helps facilitate communications, such as information about buffer status and available power headroom.

[0050] The processor 220 may process the data and control information (e.g., encoding and symbol mapping) to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols, for example, for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a channel state information reference signal (CSI-RS). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​these data symbols, control symbols, and / or reference symbols (if any), and provide an output symbol stream to the modulator (MOD) in the transceiver 232a-232t. Each modulator may process its own output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert into an analog signal, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from the modulators in the transceivers 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0051] At UE 120a, antennas 252a-252r can receive downlink signals from BS 110a and provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator can condition (e.g., filter, amplify, downconvert, and digitize) the respective received signals to obtain input samples. Each demodulator can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain received symbols from all demodulators in transceivers 254a-254r, perform MIMO detection on the received symbols (if any), and provide detected symbols. Receive processor 258 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to data sink 260, and provide decoded control information to controller / processor 280.

[0052] On the uplink, at the UE 120a, a transmit processor 264 may receive data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)) and process the data and control information. The transmit processor 264 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 (if applicable), further processed by the modulators in the transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted back to the BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 234, processed by modulator, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller / processor 240.

[0053] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0054] The antenna 252, processors 266, 258, 264 and / or controller / processor 280 and / or antenna 234 of the UE 120a, the processors 220, 230, 238 and / or controller / processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2 As shown in FIG. 1 , the controller / processor 240 of the BS 110a has a group SPS manager 241, which can be configured for group SPS for path diversity according to various aspects described herein. Figure 2 As shown in , according to various aspects described herein, the controller / processor 280 of UE 120a has a side link manager 241, which can be configured for group SPS for path diversity. Although shown at the controller / processor, other components of UE 120a and BS 110a can also be used to perform the operations described herein.

[0055] NR can utilize orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) on uplink and downlink. NR can support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are also commonly called tones, frequency bands, etc. Each subcarrier can be modulated with data. Modulation symbols can be sent in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation (called resource block (RB)) can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15KHz, and other SCSs (for example, 30kHz, 60kHz, 120kHz, 240kHz, etc.) can be specified relative to the basic SCS.

[0056] Figure 3 300 is a diagram showing an example of a frame format for NR. The transmission time axis of each of the downlink and uplink can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10ms), and each radio frame can be divided into 10 subframes indexed from 0 to 9, each subframe being 1ms. Each subframe can include a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots) depending on the SCS. Each slot can include a variable number of symbol periods (e.g., 7, 12, or 14 symbols) depending on the SCS. An index can be assigned to the symbol period in each slot. The subslot structure can refer to a transmission time interval (e.g., 2, 3, or 4 symbols) with a duration less than one slot. Each symbol in a slot can be configured with a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction of each subframe can be dynamically switched. The link direction can be based on the slot format. Each slot can include DL / UL data and DL / UL control information.

[0057] In NR, synchronization signal blocks (SSBs) are transmitted. In certain aspects, SSBs may be transmitted in bursts, where each SSB in a burst corresponds to a different beam direction for UE-side beam management (e.g., including beam selection and / or beam refinement). SSBs include PSS, SSS, and two symbols PBCH. They may be transmitted in fixed slot positions (e.g., Figure 3Symbols 0-3 shown in ). The UE can use PSS and SSS for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identification. PBCH carries some basic system information, such as downlink system bandwidth, timing information within a radio frame, SS burst set period, system frame number, etc. SSBs can be organized into SS bursts to support beam scanning. Other system information such as remaining minimum system information (RMSI), system information block (SIB), and other system information (OSI) can be sent on the physical downlink shared channel (PDSCH) in certain subframes. SSBs can be transmitted up to 64 times, for example, for mmWave, in up to 64 different beam directions. Multiple transmissions of SSBs are called SS burst sets. SSBs in an SS burst set are sent in the same frequency domain, while SSBs in different SS burst sets can be sent in different frequency domains.

[0058] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS 110) allocates resources for communications between some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize resources allocated by the scheduling entity. BS 110 is not the only entity that may act as a scheduling entity. In some examples, UE 120 may act as a scheduling entity, and may schedule resources for one or more subordinate entities (e.g., one or more other UEs 120), and other UEs 120 may utilize the resources scheduled by the UE 120 for wireless communications. In some examples, UE 120 may act as a scheduling entity in a peer-to-peer (P2P) network and / or a mesh network. In a mesh network example, UE 120 may communicate directly with each other in addition to communicating with a scheduling entity.

[0059] In some examples, the communication between UE 120 and BS 110 is referred to as an access link (or direct link). The access link may be provided via a Uu interface. The communication between UEs may be referred to as a side link.

[0060] In some examples, two or more subordinate entities (e.g., UE 120) can communicate with each other using sidelink signals. Practical applications of such sidelink communications may include public safety, proximity services, UE to network relay, vehicle to vehicle (V2V) communication, Internet of Everything (IoE) communication, Internet of Things communication, mission-critical grids, and / or various other appropriate applications. Typically, a sidelink signal may refer to a signal transmitted from one subordinate entity (e.g., UE 120a) to another subordinate entity (e.g., UE 120) without relaying the communication through a scheduling entity (e.g., UE 120 or BS110), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, licensed spectrum may be used to transmit sidelink signals (unlike wireless local area networks that typically use unlicensed spectrum). An example of sidelink communication is PC5, for example, as used in V2V, LTE, and / or NR.

[0061] Various sidelink channels may be used for sidelink communications, including a physical sidelink discovery channel (PSCCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), and a physical sidelink feedback channel (PSFCH). The PSDCH may carry discovery expressions that enable neighboring devices to discover each other. The PSCCH may carry control signaling, such as sidelink resource configurations, and other parameters for data transmission, and the PSSCH may carry data transmissions. The PSFCH may carry feedback such as channel state feedback (CSF) related to sidelink channel quality.

[0062] In some cases, sidelinks can be used in Industrial Internet of Things (IIoT) systems. IIoT wireless devices can allow machines to tell operators how to optimize productivity or detect failures before they occur, saving companies money. Using sidelinks in IIoT can reduce latency, provide multipath diversity, extend coverage, extend battery life, provide location enhancement, and enable infrastructure-free communications.

[0063] Figure 4 , 5 6 are diagrams illustrating exemplary access links and side links according to certain aspects of the present disclosure. Figure 4 As shown in FIG. 4 , the IIOT system 400 may include a gNB 402 and sidelink devices 404, 406, 408 (which may be UEs). The gNB 402 communicates with the sidelink devices 404, 406, 408 via a direct link, and the sidelink devices 404, 406, 408 communicate with each other via a sidelink. However, in some cases, the direct link between the gNB 402 and the sidelink device 406 may be blocked, such as Figure 5In some cases, a programmable logic controller (PLC) may be used. For example, gNB 402 in IIOT system 600 communicates with PLC 610 via a direct link, and PLC 610 communicates with sidelink devices 404, 406, 408 via a sidelink (and / or via an access link), as shown in FIG. Figure 6 as shown in .

[0064] To increase path diversity, a sidelink device in the system (e.g., referred to herein as a helper UE) may retransmit an initial transmission from a gNB or PLC to other sidelink devices in the system (e.g., referred to herein as a target UE), such as a sidelink UE having a blocked link with the gNB or PLC.

[0065] In some cases, the sidelink device may perform sidelink channel signal quality measurements (e.g., reference signal received power (RSRP) measurements) of the pilot signal. The sidelink device may report the sidelink channel measurement results to the gNB. Based on the reported measurement results, the gNB schedules the sidelink device. For example, the gNB may select a helper UE and a target UE.

[0066] Example Group SPS for Path Diversity

[0067] Aspects of the present disclosure provide group semi-persistent scheduling (SPS) for path diversity.

[0068] As described above, sidelink communications may be configured. In some aspects, sidelink communications may be configured in an Industrial Internet of Things (IIoT) system. In IIoT, traffic may be periodic and traffic arrival times may be known. Thus, SPS scheduling may be used for data transmission from a base station (BS) to a user equipment (UE) and / or from a programmable logic controller (PLC) to a UE.

[0069] SPS can reduce control channel overhead. For example, services that use persistent radio resources at regular intervals may involve a large amount of control channel overhead. In order to avoid using a large amount of downlink allocations and uplink grants, SPS can significantly reduce control channel overhead by using a minimum amount of downlink allocations and uplink grants. For example, SPS may allocate radio resources for a longer period of time. Once SPS is configured, the UE can receive / send data according to the configured period.

[0070] Figure 7 is a call flow diagram illustrating example operations 600 of group SPS for path diversity. Figure 7 BS 110a is shown, but these operations may also be performed by, for example, a PLC in communication with BS 110a. Figure 7As shown in , at 702, one or more side link groups may be formed, each group including one or more "helper" UEs 120a and one or more "target" UEs 120b. As further described herein, each helper UE 120a is configured to store data from BS110a, and / or retransmit data from BS110a to one or more target UEs 120b. In some examples, the side link group may be configured by BS110a. For example, the formation of the side link group at 702 may include: UEs 120a, 120b exchanging reference signals (e.g., side link channel state information reference signals (CSI-RS)), measuring channel quality, and reporting the measurement results to BS110a. Based on the reported measurements, BS110a may form a side link group.

[0071] At 704, BS 110a may configure one or more SPS resources for one or more groups of UEs. Figure 7 As shown in , BS110a sends radio resource control (RRC) signaling to configure common SPS resources for UE 120a and UE 120b. In some examples, the UEs in the side link group can use the common SPS resources for broadcast and / or multicast transmission. According to certain aspects, BS110a also configures a group ID (or multiple group IDs) associated with the common SPS resources. The group ID can be used to activate the common SPS resources for one or more groups of associated UEs.

[0072] According to certain aspects, BS 110a may use common downlink control information (DCI) to activate (e.g., or release) the configured SPS resource (or resources). Figure 7 As shown in , at 706, BS 110a sends DCI to at least the helping UE 120a. The DCI may also be sent to the target UE 120b. UE 120b may receive the DCI or may not receive the DCI, depending on whether the link is blocked. In some examples, the group ID is a Group-SPS-RNTI (Radio Network Temporary Identifier).

[0073] At 708, BS 110a sends an initial transmission to the sidelink group including UEs 120a, 120b. In some examples, the helper UE 120a may store the initial transmission in a buffer for later retransmission to the target UE. The buffer may be a separate (e.g., dedicated) HARQ buffer for sidelink retransmissions.

[0074] At 710, the helping UE 120a may determine a target UE for an initial data transmission.

[0075] In some examples, BS110a further configures the target UE configured scheduling (CS) RNTI or semi-persistent scheduling cell RNTI (SPS-C-RNTI) through RRC. For example, at 704, in addition to the common SPS resources and group ID, the target UE ID can also be configured. CS-RNTI or SPS-C-RNTI can be used for SPS activation / release. In this case, the helper UE 120a can identify the target UE 120b based on the CS-RNTI or SPS-C-RNTI.

[0076] In some examples, BS 110a configures (e.g., via RRC) a helper UE ID and a target UE ID in addition to a group ID associated with the common SPS resources at 704. Thus, when activating the SPS resources at 706, the helper UE 120a knows (e.g., can determine or identify) the associated helper UE and target UE (e.g., target UE 120b).

[0077] In some examples, BS 110a configures (e.g., via RRC) UEs associated with a group ID at 704, but the RRC configuration does not indicate which UEs are helper UEs and target UEs. In this case, the target UE ID may be indicated in the DCI at 706 in addition to the group ID used for SPS activation (or release) and / or indicated in a channel (e.g., a physical downlink shared channel (PDSCH)) at 708 using an SPS data message.

[0078] At 712, the helper UE 120a may send a sidelink retransmission of the initial data transmission received at 708 (e.g., and stored in a buffer of the UE 120a) to the identified target UE 120b. In some examples, the retransmission is triggered (e.g., requested, indicated, scheduled) by the BS110a. For example, the BS110a may identify that the target UE 120b failed to successfully decode the initial transmission. For example, the BS110a may identify that the BS110a did not receive an acknowledgment (ACK) or a negative acknowledgment (NACK) from the target UE 120b after a certain period of time. Based on the detection of the failure to receive HARQ feedback from the target UE 120b, the BS110a may assume that the target UE 120b failed to successfully decode the initial transmission. In this case, the BS110a may signal the helper UE 120a (e.g., transmitted via a physical downlink control channel (PDCCH)) to retransmit the data to the target UE 120b.

[0079] According to certain aspects, the configured common SPS resources may be updated (or reconfigured). In some examples, when the resource allocation for SPS changes, BS110a may indicate a change in the DCI for SPS activation (or release) at 706. In some examples, BS110a also indicates, for example, at 706, in the DCI: whether to request UE 120a, 120b to confirm the SPS resource change. BS110a may configure resources for confirmation (e.g., during the initial SPS resource allocation configured by RRC at 704). Therefore, UE 120a, 120b may monitor the DCI for activation (or release) and SPS resource changes.

[0080] Figure 8 800 is a flow chart illustrating example operations 800 for wireless communication according to certain aspects of the present disclosure. For example, operations 800 may be performed by a node such as a BS (e.g., BS 110a in wireless communication network 100) or a PLC (not shown). Operations 800 may be complementary operations performed by the node to operations 900 and / or 1000 performed by a UE. Operations 800 may be implemented as a processor (e.g., Figure 2 In addition, the communication may be performed, for example, via one or more antennas (e.g., Figure 2 The transmission and reception of signals by the node in operation 800 may be implemented by antenna 234 of the controller. In some aspects, the transmission and / or reception of signals by the node may be implemented via a bus interface of one or more processors (e.g., controller / processor 240) that obtains and / or outputs signals.

[0081] Operation 800 may begin at 805, configuring one or more SPS resources (e.g., common SPS resources) for one or more groups of UEs (e.g., via RRC signaling). In some examples, the one or more SPS resources are configured with one or more associated group IDs. The node may configure (e.g., via RRC signaling) Group-SPS-RNTI to activate (or release) SPS resources. In some examples, the node may send RRC signaling indicating a first subset of one or more UEs in the group (e.g., helper UEs) and a second subset of one or more UEs in the group (e.g., target UEs). The first subset of one or more UEs may be configured to retransmit data to a second subset of one or more UEs. In some examples, the BS sends RRC signaling indicating the UEs in the group. The identifier may be a CS-RNTI or an SPS-C-RNTI. In some examples, the node configures resources for confirming SPS resource updates for a group of UEs (e.g., configured via RRC).

[0082] At 810, the node sends a DCI to activate an SPS resource for a group of UEs in a plurality of groups of UEs. In some examples, the node sends a common DCI including a Group-SPS-RNTI to activate the SPS resource for the group of UEs. In some examples, the DCI includes one or more identifiers of a subset of one or more UEs in the group of UEs that are intended targets of the data. In some examples, the node sends a DCI including an indication of the updated SPS resource. The DCI may include a request for a group of UEs to confirm the updated SPS resource.

[0083] At 815, the node sends data (eg, an initial data transmission) to a group of UEs using the activated SPS resources. In some examples, the node indicates in a PDSCH with the data transmission: one or more identifiers of a subset of UEs in the group of UEs that are intended targets for the data transmission.

[0084] In some examples, the node sends additional DCI to release SPS resources.

[0085] Fig. 9 1 is a flow chart illustrating example operations 900 for wireless communication according to certain aspects of the present disclosure. For example, operations 900 may be performed by a first UE (e.g., UE 120a in wireless communication network 100), where the first UE may be a helping UE. Operations 900 may be complementary operations performed by the UE to operations 800 performed by the node and / or operations 1000 performed by the target UE. Operations 900 may be implemented as a processor (e.g., Figure 2 In addition, the communication may be performed, for example, via one or more antennas (e.g., Figure 2 The antenna 252 of the first UE implements the transmission and reception of signals in operation 900. In some aspects, the transmission and / or reception of signals by the first UE can be implemented via a bus interface of one or more processors (e.g., controller / processor 280) that obtains and / or outputs signals.

[0086] Operation 900 may start at 905, receiving a configuration of one or more SPS resources for a group of UEs, the group of UEs including a first UE and a second UE. In some examples, the one or more SPS resources are configured via RRC signaling. In some examples, the one or more SPS resources are configured with one or more associated group IDs. In some examples, the RRC signaling indicates Group-SPS-RNTI. In some examples, the RRC signaling indicates a first subset of one or more UEs in the group of UEs and a second subset of one or more UEs in the group of UEs. The first subset of one or more UEs may be configured to retransmit data to a second subset of one or more UEs. The first UE is in the first subset, and the second UE is in the subset. In some examples, the RRC signaling indicates the UEs in the group. In some examples, the RRC signaling configuration is used to provide resources for confirmation of the updated SRS resources.

[0087] At 910, the first UE receives a DCI for activating one of the one or more SPS resources from a node. In some examples, the DCI is a common DCI, which includes a group SPS-RNTI to activate SPS resources for a group of UEs. In some examples, the DCI also includes one or more identifiers of one or more UEs in a group of UEs that are intended targets of data, the identifier including an identifier of the second UE. In some examples, the one or more identifiers are CS-RNTI or SPS-C-RNTI. In some examples, the DCI includes one or more identifiers of one or more UEs of the subset, including an identifier of the second UE.

[0088] At 915, the first UE receives data from the node using the activated SPS resources. In some examples, the first UE receives, in a PDSCH with data, an indication of one or more identifiers of one or more UEs in a group of UEs that are intended targets for the data transmission, including an identifier of the second UE. The first UE may store the received data.

[0089] At 920, the first UE may retransmit the data to the second UE.

[0090] In some examples, the first UE receives a DCI including an indication of updated SPS resources. The DCI may also include a request for the UE to confirm the updated SPS resources.

[0091] In some examples, the first UE also receives a DCI for releasing SPS resources.

[0092] Fig.101 is a flow chart illustrating example operations 1000 for wireless communication according to certain aspects of the present disclosure. For example, operations 1000 may be performed by a second UE (e.g., UE 120b in wireless communication network 100), where the second UE may be a target UE. Operations 1000 may be complementary operations performed by the second UE to operations 800 performed by the node and / or operations 900 performed by the helping UE. Operations 1000 may be implemented as a processor (e.g., Figure 2 In addition, the communication may be performed, for example, via one or more antennas (e.g., Figure 2 The antenna 252 of the second UE may be used to implement transmission and reception of signals by the second UE in operation 1000. In some aspects, transmission and / or reception of signals by the second UE may be implemented via a bus interface of one or more processors (e.g., controller / processor 280) that obtain and / or output signals.

[0093] Operations 1000 may begin at 1005 by receiving a configuration of one or more SPS resources for a group of UEs, the group of UEs including a second UE and a first UE. The second UE may receive an RRC configuration as described above for the first UE. The second UE may receive a DCI as described above for the first UE.

[0094] At 1010, the second UE monitors the one or more SPS resources for data transmission from the BS.

[0095] The second UE may receive a data retransmission from the first UE at 1015. The second UE may receive updated SPS resources, configured acknowledgement resources, and / or DCI for SPS release, as described above for the first UE.

[0096] Fig.11 A communication device 1100 is shown that may include various components (eg, corresponding to functional unit components), wherein these components are configured to perform operations of the techniques disclosed herein (eg, Figure 8 1100). The communication device 1100 includes a processing system 1102 coupled to a transceiver 1108 (e.g., a transmitter and / or a receiver). The transceiver 1108 is configured to transmit and receive signals for the communication device 1100 (e.g., various signals as described herein) via an antenna 1110. The processing system 1102 may be configured to perform processing functions for the communication device 1100, including processing signals received and / or transmitted by the communication device 1100.

[0097] The processing system 1102 includes a processor 1104 coupled to a computer-readable medium / memory 1112 via a bus 1106. In some aspects, the computer-readable medium / memory 1112 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1104, cause the processor 1104 to perform Figure 8 , or other operations that perform the various techniques for group SPS for path diversity discussed herein. In some aspects, the computer-readable medium / memory 1112 stores: code 1114 for configuring one or more SPS resources for one or more groups of UEs in accordance with various aspects of the present disclosure; code 1116 for sending DCI to activate SPS resources for a group of UEs; and code 1118 for sending data to a group of UEs using the activated SPS resources. In some aspects, the processor 1104 has circuits configured to implement the codes stored in the computer-readable medium / memory 1112. The processor 1104 includes: circuits 1120 for configuring one or more SPS resources for one or more groups of UEs in accordance with various aspects of the present disclosure; circuits 1122 for sending DCI to activate SPS resources for a group of UEs; and circuits 1124 for sending data to a group of UEs using the activated SPS resources.

[0098] For example, a unit for transmitting (or a unit for outputting to transmit), a unit for configuring, a unit for sending, and / or a unit for communicating may include Figure 2 The transmitter and / or antenna 234 of BS 110a shown in FIG. Fig.11 The transceiver 1108, antenna 1110, circuit 1220, circuit 1122 and / or circuit 1224 of the communication device 1100 in FIG. The unit for receiving (or the unit for obtaining) may include Figure 2 The receiver and / or antenna 234 and / or Fig.11 The transceiver 1108 and / or antenna 11110 of the communication device 1100 in the embodiment of the present invention. The means for determining may include a processing system, which may include one or more processors, such as Figure 2 The transmit processor 220, TX MIMO processor 230, receive processor 238 and / or controller / processor 240 of BS 110a shown in FIG. Fig.11 The processing system 1102 of the communication device 1100 in FIG.

[0099] Fig.12 A communication device 1200 is shown that may include various components (eg, corresponding to functional unit components), wherein these components are configured to perform operations of the techniques disclosed herein (eg, Fig. 9 and / or Fig.10 1200). The communication device 1200 includes a processing system 1202 coupled to a transceiver 1208 (e.g., a transmitter and / or a receiver). The transceiver 1208 is configured to send and receive signals for the communication device 1200 (e.g., various signals as described herein) via an antenna 1210. The processing system 1202 can be configured to perform processing functions for the communication device 1200, including processing signals received and / or transmitted by the communication device 1200.

[0100] The processing system 1202 includes a processor 1204 coupled to a computer-readable medium / memory 1212 via a bus 1206. In some aspects, the computer-readable medium / memory 1212 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1204, cause the processor 1204 to perform Fig.10 and / or Fig.11 , or other operations that perform the various techniques for group SPS for path diversity discussed herein. In some aspects, the computer-readable medium / memory 1212 stores: code 1214 for receiving a configuration of one or more SPS resources for one or more groups of UEs in accordance with various aspects of the present disclosure; code 1216 for receiving DCI from a node that activates the configured SPS resources; code 1218 for receiving data from a node using the activated SPS resources; code 1220 for retransmitting data to a second UE; code 1222 for monitoring SPS resources for data transmission from a BS; and / or code 1224 for receiving data retransmissions from a first UE. In some aspects, the processor 1204 has circuitry configured to implement the code stored in the computer-readable medium / memory 1212. Processor 1204 includes: circuitry 1225 for receiving a configuration of one or more SPS resources for one or more groups of UEs; circuitry 1128 for receiving DCI from a node activating the configured SPS resources; circuitry 1230 for receiving data from a node using the activated SPS resources; circuitry 1232 for retransmitting data to a second UE; circuitry 1234 for monitoring the SPS resources for data transmission from the BS; and / or circuitry 1236 for receiving a data retransmission from a first UE in accordance with aspects of the present disclosure.

[0101] For example, a unit for transmitting (or a unit for outputting to transmit), a unit for retransmitting, a unit for communicating, and / or a unit for sending may include Figure 2 The transmitter unit 254 and / or antenna 252 and / or Fig.12The circuit 1232, the transceiver 1208 and / or the antenna 1210 of the communication device 1200 in FIG. The unit for receiving (or the unit for obtaining) and / or the unit for monitoring may include Figure 2 The receiver and / or antenna 252 and / or Fig.12 The circuits 1226, 1228, 1230, 1234, 1236, transceiver 1208 and / or antenna 1210 of the communication device 1200 in the embodiment of the present invention. The means for determining, the means for taking action, and the means for judging may include a processing system, which may include one or more processors, such as Figure 2 The receive processor 258, transmit processor 264, TX MIMO processor 266 and / or controller / processor 280 of the UE 120a shown in FIG. Fig.12 The processing system 1202 of the communication device 1200 in FIG.

[0102] Exemplary Aspects

[0103] Aspect 1: A method for wireless communication of a node, comprising: configuring one or more semi-persistent scheduling (SPS) resources for one or more groups of user equipment (UE); sending downlink control information (DCI) to activate one of the SPS resources for a group of UEs in the multiple groups of UEs; and using the activated SPS resources to send data to the group of UEs.

[0104] Aspect 2: The method according to aspect 1, wherein the one or more SPS resources are configured via radio resource control (RRC) signaling.

[0105] Aspect 3: The method according to any one of aspects 1 or 2, wherein the one or more SPS resources are configured with one or more associated group identifiers (IDs).

[0106] Aspect 4: The method according to any one of aspects 1-3, wherein the DCI includes a common DCI, and the common DCI includes a group SPS radio network temporary identifier (Group-SPS-RNTI) to activate the SPS resources for the group of UEs.

[0107] Aspect 5: The method according to aspect 4 further includes: configuring the Group-SPS-RNTI via radio resource control (RRC) signaling.

[0108] Aspect 6: The method according to any one of Aspects 4 or 5 further includes: sending radio resource control (RRC) signaling indicating a first subset of one or more UEs in the group of UEs and a second subset of one or more UEs in the group of UEs, wherein the first subset of the one or more UEs is configured to resend the data to the second subset of the one or more UEs.

[0109] Aspect 7: The method according to any one of aspects 4-6 further includes: sending radio resource control (RRC) signaling indicating the UEs in the group.

[0110] Aspect 8: The method according to aspect 7, wherein the DCI further includes: one or more identifiers of one or more UEs in the group of UEs that are intended targets of the data.

[0111] Aspect 9: The method according to any one of Aspects 7 or 8 further includes: indicating, in a physical downlink shared channel (PDSCH) having the data, one or more identifiers of one or more UEs in the group of UEs that are intended targets of the data.

[0112] Aspect 10: The method according to any one of Aspects 4-9 further includes: configuring one or more identifiers of a second subset of one or more UEs in the group of UEs for a first subset of one or more UEs in the group of UEs, wherein the first subset of one or more UEs is configured to resend the data to the second subset of one or more UEs.

[0113] Aspect 11: The method according to aspect 10, wherein the one or more identifiers of the second subset of the group of UEs include: a configured scheduling radio network temporary identifier (CS-RNTI) or an SPS cell RNTI (SPS-C-RNTI).

[0114] Aspect 12: The method according to any one of aspects 10 or 11, wherein the DCI further includes one or more identifiers of the one or more UEs of the subset.

[0115] Aspect 13: The method according to any one of aspects 1-12 further comprises: sending a DCI including an indication of the updated SPS resources.

[0116] Aspect 14: The method according to aspect 13, wherein the DCI further includes: a request for the group of UEs to confirm the updated SPS resources.

[0117] Aspect 15: The method according to aspect 14 further comprises: configuring resources for providing confirmation via radio resource control (RRC) signaling for the group of UEs.

[0118] Aspect 16: The method according to any one of Aspects 1-15 further includes: sending a DCI to release the SPS resources.

[0119] Aspect 17: A method for wireless communication for a first user equipment (UE), comprising: receiving a configuration of one or more semi-persistent scheduling (SPS) resources for a group of UEs, wherein the group of UEs includes a first UE and a second UE; receiving downlink control information (DCI) from a node that activates one of the one or more SPS resources; and receiving data from the node using the activated SPS resource.

[0120] Aspect 18: The method according to aspect 17 further includes: resending the data to the second UE.

[0121] Aspect 19: The method according to any one of Aspects 17 or 18, wherein the one or more SPS resources are configured via radio resource control (RRC) signaling.

[0122] Aspect 20: The method according to any one of aspects 17-19, wherein the one or more SPS resources are configured with one or more associated group identifiers (IDs).

[0123] Aspect 21: The method according to any one of aspects 17-20, wherein the DCI includes a common DCI, the common DCI including a group SPS radio network temporary identifier (Group-SPS-RNTI) to activate the SPS resources for the group of UEs.

[0124] Aspect 22: The method according to aspect 21 further comprises: receiving the configuration of the Group-SPS-RNTI via radio resource control (RRC) signaling.

[0125] Aspect 23: The method according to any one of Aspects 21 or 22 further includes: receiving radio resource control (RRC) signaling indicating a first subset of one or more UEs in the group and a second subset of one or more UEs in the group, wherein the first subset of the one or more UEs is configured to resend the data to the second subset of the one or more UEs, and wherein the first UE is in the first subset and the second UE is in the subset.

[0126] Aspect 24: The method according to any one of aspects 21-23 further comprises: receiving radio resource control (RRC) signaling indicating the UEs in the group.

[0127] Aspect 25: A method according to any one of Aspects 23 or 24, wherein the DCI further includes: one or more identifiers of one or more UEs in the group of UEs that are intended targets of the data, including an identifier of the second UE.

[0128] Aspect 26: The method according to any one of Aspects 23-25 ​​further includes: receiving, in a physical downlink shared channel (PDSCH) having the data, one or more identifiers indicating one or more UEs in the group of UEs that are intended targets of the data, including an identifier of the second UE.

[0129] Aspect 27: The method according to any one of Aspects 21-26 also includes: receiving a configuration of one or more identifiers of a subset of one or more UEs in the group of UEs, wherein the UE is configured to resend the data to one or more UEs in the subset, wherein the one or more identifiers include an identifier of the second UE.

[0130] Aspect 28: The method according to aspect 27, wherein the one or more identifiers of the subset of the group of UEs include: a configured scheduling radio network temporary identifier (CS-RNTI) or an SPS cell RNTI (SPS-C-RNTI).

[0131] Aspect 29: A method according to any one of Aspects 27 or 28, wherein the DCI also includes one or more identifiers of the one or more UEs of the subset, including an identifier of the second UE.

[0132] Aspect 30: The method according to any one of aspects 17-29, further comprising: receiving a DCI including an indication of updated SPS resources.

[0133] Aspect 31: The method according to Aspect 30, wherein the DCI also includes: a request for the UE to confirm the updated SPS resources.

[0134] Aspect 32: The method according to aspect 31 further includes: receiving radio resource control (RRC) signaling, wherein the RRC signaling is configured to provide confirmed resources.

[0135] Aspect 33: The method according to any one of Aspects 17-32 further includes: receiving a DCI to release the SPS resources.

[0136] Aspect 34: A method for wireless communication for a second user equipment (UE), comprising: receiving a configuration of one or more semi-persistent scheduling (SPS) resources for a group of UEs, wherein the group of UEs includes the second UE and a first UE; and monitoring the one or more SPS resources for data transmission from a base station (BS).

[0137] Aspect 35: The method according to Aspect 34 further includes: receiving a retransmission of the data from the first UE.

[0138] Aspect 36: A method according to any one of Aspects 34 or 35, wherein the one or more SPS resources are configured via radio resource control (RRC) signaling.

[0139] Aspect 37: A method according to any one of aspects 34-36, wherein the one or more SPS resources are configured with one or more associated group identifiers (IDs).

[0140] Aspect 38: The method according to any one of Aspects 34-37 also includes: receiving downlink control information (DCI) from a base station (BS), the DCI including common DCI scheduling data and including a group SPS radio network temporary identifier (Group-SPS-RNTI) to activate the SPS for the group of UEs.

[0141] Aspect 39: The method according to Aspect 38 further includes: receiving the configuration of the Group-SPS-RNTI via radio resource control (RRC) signaling.

[0142] Aspect 40: The method according to any one of Aspects 38 or 39 further includes: receiving radio resource control (RRC) signaling indicating a first subset of one or more UEs in the group and a second subset of one or more UEs in the group, wherein the first subset of the one or more UEs is configured to resend the data to the second subset of the one or more UEs, and wherein the first UE is in the first subset and the second UE is in the subset.

[0143] Aspect 41: The method according to any one of aspects 38-40 further comprises: receiving radio resource control (RRC) signaling indicating the UEs in the group.

[0144] Aspect 42: The method according to aspect 41, wherein the DCI further comprises: one or more identifiers of one or more UEs in the group of UEs that are intended targets of the data, including an identifier of the second UE.

[0145] Aspect 43: The method according to any one of Aspects 41 or 42 further includes: receiving, in a physical downlink shared channel (PDSCH) having the data, one or more identifiers indicating one or more UEs in the group of UEs that are intended targets of the data, including an identifier of the second UE.

[0146] Aspect 44: The method according to any one of Aspects 38-43 further includes: receiving a configuration of one or more identifiers of one or more UEs in a first subset of the group of UEs and one or more identifiers of one or more UEs in a second subset of the group of UEs, wherein the first subset of the one or more UEs is configured to resend the data to the second subset of the one or more UEs.

[0147] Aspect 45: The method according to aspect 44, wherein the one or more identifiers of the subset of the group of UEs include: a configured scheduling radio network temporary identifier (CS-RNTI) or an SPS cell RNTI (SPS-C-RNTI).

[0148] Aspect 46: A method according to any one of Aspects 44 or 45, wherein the DCI also includes one or more identifiers of the one or more UEs of the subset, including an identifier of the second UE.

[0149] Aspect 47: The method according to any one of aspects 34-46, further comprising: receiving a DCI including an indication of updated SPS resources.

[0150] Aspect 48: The method according to Aspect 47, wherein the DCI also includes: a request for the UE to confirm the updated SPS resources.

[0151] Aspect 49: The method according to aspect 48 further includes: receiving radio resource control (RRC) signaling, the RRC signaling being configured to provide confirmed resources.

[0152] Aspect 50: The method according to any one of aspects 34-49 further includes: receiving a DCI to release the SPS resources.

[0153] The techniques described herein can be used for various wireless communication technologies, for example, NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks may implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, and the like. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma 2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0154] In 3GPP, the term "cell" may refer to the coverage area of ​​a Node B (NB) and / or a NB subsystem serving the coverage area, depending on the context in which the term "cell" is used. In the NR system, the term "cell" and BS, next-generation Node B (gNB or gNodeB), access point (AP), distributed unit (DU), carrier or transmission reception point (TRP) may be used interchangeably. The BS may provide communication coverage for macro cells, pico cells, femto cells and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers), which allows unrestricted access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area, which allows unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home), which allows restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in the home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be called a femto BS or a home BS.

[0155] UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a customer premises equipment (CPE), a cellular phone, a smart phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a home appliance, a medical device or medical apparatus, a biosensor / device, a wearable device such as a smart watch, smart clothes, smart glasses, a smart bracelet, smart jewelry (e.g., a smart bracelet, a smart bracelet, etc.), an entertainment device (e.g., a music device, a video device, a satellite radio device, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium. Some UEs may be considered as machine type communication (MTC) devices or evolved MTC (eMTC) devices. For example, MTC and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0156] The disclosed methods herein include one or more steps or actions for implementing these methods. Without departing from the scope of protection of the present invention, these method steps and / or actions can be interchangeable. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be modified without departing from the scope of protection of the present invention.

[0157] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. For example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc or any other ordering of a, b, and c).

[0158] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" may include calculating, computing, processing, deriving, investigating, querying (e.g., querying a table, a database, or other data structure), ascertaining, and the like. In addition, "determine" may also include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. In addition, "determine" may also include resolving, selecting, choosing, establishing, and the like.

[0159] To enable any person of ordinary skill in the art to implement the various aspects described herein, the above description is made around various aspects. It is obvious to those of ordinary skill in the art that various modifications to these aspects are possible, and the general principles defined herein may also be applicable to other aspects. Therefore, the present invention is not limited to the aspects shown herein, but is consistent with the full scope of the present invention, wherein, unless otherwise specified, modifying a certain component in the singular form does not mean "one and only one", but may be "one or more". Unless otherwise specifically stated, the term "some" refers to one or more. All structural and functional equivalents of the components of the various aspects described throughout the present disclosure are expressly incorporated herein by reference, and are intended to be covered by the claims, and these structural and functional equivalents are known or will be known to those of ordinary skill in the art. In addition, no disclosure herein is intended to be dedicated to the public, regardless of whether such disclosure is clearly recorded in the claims. In addition, any claim element should not be interpreted under 35 U.S.C. §112, paragraph 6, unless the element is explicitly recited using the wording of “functional means” or, in a method claim, the element is recited using the wording of “functional step.”

[0160] The various operations of the methods described above may be performed by any suitable unit capable of performing the corresponding functions. These units may include various hardware and / or software components and / or modules, including but not limited to: circuits, application specific integrated circuits (ASICs) or processors. Generally, where operations are shown in the accompanying drawings, these operations may have corresponding paired functional module components that are similarly numbered.

[0161] A general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components or any combination thereof for performing the functions described herein may implement or perform various exemplary logic blocks, modules and circuits described in conjunction with the contents disclosed herein. A general purpose processor may be a microprocessor, or the processor may be any commercially available processor, controller, microcontroller or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such structure.

[0162] When implemented in hardware, an exemplary hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnected buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement signal processing functions at the physical layer. In a user terminal (see Figure 1 ), a user interface (e.g., keyboard, display, mouse, joystick, etc.) may also be connected to the bus. The bus also links various other circuits such as clock sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and are not described any further. The processor may be implemented using one or more general purpose processors and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. One of ordinary skill in the art will recognize how to best implement the described functionality of the processing system depending on the specific application and the overall design constraints imposed on the entire system.

[0163] When implemented using software, these functions can be stored on a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Software should be broadly interpreted as meaning instructions, data, or any combination thereof, etc., whether it is referred to as software, firmware, middleware, microcode, hardware description language, or other terms. Computer-readable media include computer storage media and communication media, wherein the communication medium includes any medium that facilitates the transmission of a computer program from one place to another. The processor can be responsible for managing the bus and general processing, which includes executing the software stored on the machine-readable storage medium. The computer-readable storage medium can be coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium can also be a part of the processor. For example, the machine-readable medium can include a transmission line, a carrier waveform modulated with data, and / or a computer-readable storage medium with instructions stored thereon separated from the wireless node, all of which can be accessed by the processor through a bus interface. Alternatively or additionally, the machine-readable medium or any part thereof can be a component of the processor, for example, the case can be a cache and / or a general register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard disks, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0164] A software module may include a single instruction or multiple instructions, and the software module may be distributed over several different code segments, distributed among different programs, and distributed among multiple storage media. A computer-readable medium may include multiple software modules. These software modules include instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a transmission module and a receiving module. Each software module may be located in a single storage device or distributed among multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard disk into a RAM. During the execution of the software module, the processor may load some of these instructions into a cache to increase access speed. Subsequently, one or more cache lines may be loaded into a general register file for execution by the processor. When referring to the function of the following software module, it should be understood that the function is implemented by the processor when executing instructions from the software module.

[0165] Moreover, any connection may be properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared (IR), wireless and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless and microwave are included in the definition of the medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Optical disks, where magnetic disks typically reproduce data magnetically, and optical disks use lasers to reproduce data optically. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include temporary computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of protection of computer-readable media.

[0166] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, the computer program product may include a computer-readable medium having instructions stored thereon (and / or encoded thereon), which instructions may be executed by one or more processors to perform the operations described herein (e.g., for performing the operations described herein and in Figure 8-10 ).

[0167] In addition, it should be understood that the modules and / or other appropriate units for performing the methods and techniques described herein can be downloaded and / or obtained on demand by a user terminal and / or a base station. For example, such a device can be coupled to a server to facilitate the implementation of a unit for transmitting and performing the methods described herein. Alternatively, the various methods described herein can be provided by a storage unit (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.), so that when a user terminal and / or a base station couples the storage unit to or provides it to the device, the various methods can be obtained. In addition, any other appropriate technology for providing the methods and techniques described herein to a device can also be used.

[0168] It should be understood that the present invention is not limited to the precise configuration and components shown above. Various modifications, changes and variations may be made to the arrangement, operation and details of the methods and devices described above without departing from the scope of the present invention.

Claims

1. A method for wireless communication by a node, comprising: Outputting radio resource control (RRC) signaling, the RRC signaling configuring a group SPS radio network temporary identifier (Group-SPS-RNTI) associated with one or more semi-persistent scheduling (SPS) resources for a group of user equipments (UEs) and configuring a group identifier (ID) associated with the group of UEs, wherein the group of UEs includes at least a first UE and one or more second UEs; outputting downlink control information (DCI) including the Group-SPS-RNTI and the group ID to activate the one or more SPS resources for the group of UEs; and Data for the first UE is output to the group of UEs in a physical downlink shared channel (PDSCH) using the one or more SPS resources, wherein the RRC signaling, the DCI or the PDSCH includes an identifier of the first UE as a target UE for the one or more second UEs to resend the data.

2. The method according to claim 1, wherein: The DCI includes common DCI.

3. The method according to claim 1, wherein: The DCI further includes the identifier of the first UE as the target UE, and wherein at least one of the RRC signaling or the PDSCH does not include the identifier of the first UE as the target UE.

4. The method according to claim 1, wherein: The PDSCH includes the identifier of the first UE as the target UE, and wherein at least one of the RRC signaling or the DCI does not include the identifier of the first UE as the target UE.

5. The method according to claim 1, wherein: The RRC signaling configures a first subset of one or more UEs in the group of UEs as the one or more second UEs and has the identifier of the first UE as the target UE, and wherein at least one of the DCI or the PDSCH does not include the identifier of the first UE as the target UE.

6. The method according to claim 1, wherein: The identifier of the first UE as the target UE includes a configured scheduling RNTI (CS-RNTI) or an SPS cell RNTI (SPS-C-RNTI) associated with the CS-RNTI.

7. The method according to claim 6, wherein: The DCI further includes the SPS-C-RNTI as the identifier of the first UE serving as the target UE.

8. The method according to claim 1, further comprising: A DCI including an indication of the updated SPS resources is output.

9. The method according to claim 8, wherein: The DCI also includes: a request for the group of UEs to confirm the updated SPS resources; and The method further includes configuring, via RRC signaling, resources for providing acknowledgement for the group of UEs.

10. The method according to claim 1, further comprising: Output DCI to release the one or more SPS resources.

11. A method for wireless communication by a first user equipment (UE), comprising: receiving radio resource control (RRC) signaling from a node, the RRC signaling configuring a group SPS radio network temporary identifier (Group-SPS-RNTI) associated with one or more semi-persistent scheduling (SPS) resources for a group of UEs and configuring a group identifier (ID) associated with the group of UEs, wherein the group of UEs includes at least one or more first UEs and a second UE; receiving downlink control information (DCI) from the node, the DCI including the Group-SPS-RNTI and the group ID to activate the one or more SPS resources for the group of UEs; receiving data transmitted from the node in a physical downlink shared channel (PDSCH) using the one or more SPS resources, wherein the RRC signaling, the DCI, or the PDSCH includes an identifier of the second UE as a target UE for the one or more first UEs to resend the data; and The data is resent to the second UE.

12. The method according to claim 11, wherein: The DCI includes common DCI.

13. The method according to claim 11, wherein: The DCI also includes: one or more identifiers of one or more UEs in the group of UEs that are intended targets of the data, including the identifier of the second UE that is the target UE, and wherein at least one of the RRC signaling or the PDSCH does not include the identifier of the second UE that is the target UE.

14. The method according to claim 11, wherein: The PDSCH includes the identifier of the second UE as the target UE, and wherein at least one of the RRC signaling or the DCI does not include the identifier of the second UE as the target UE.

15. The method according to claim 11, wherein: The identifier of the second UE as the target UE includes a configured scheduling RNTI (CS-RNTI) or an SPS cell RNTI (SPS-C-RNTI) associated with the CS-RNTI.

16. The method according to claim 15, wherein: The DCI further includes the SPS-C-RNTI as the identifier of the second UE serving as the target UE.

17. A method for wireless communication by a second user equipment (UE), comprising: receiving radio resource control (RRC) signaling from a node, the RRC signaling configuring a group SPS radio network temporary identifier (Group-SPS-RNTI) associated with one or more semi-persistent scheduling (SPS) resources for a group of UEs and configuring a group identifier (ID) associated with the group of UEs, wherein the group of UEs includes the second UE and one or more first UEs; receiving downlink control information (DCI), the DCI comprising common DCI, the common DCI comprising the group ID and the Group-SPS-RNTI to activate the one or more SPS resources for the group of UEs; monitoring the one or more SPS resources for data transmission from the node; and A retransmission of the data is received from at least one first UE of the one or more first UEs.

18. An apparatus for wireless communication, comprising: Memory; as well as at least one processor coupled to a memory, the processor and the memory being configured to: Outputting radio resource control (RRC) signaling, the RRC signaling configuring a group SPS radio network temporary identifier (Group-SPS-RNTI) associated with one or more semi-persistent scheduling (SPS) resources for a group of devices and configuring a group identifier (ID) associated with the group of devices, wherein the group of devices includes at least a first UE and one or more second UEs; outputting downlink control information (DCI) including the Group-SPS-RNTI and the group ID to activate the one or more SPS resources for the group of devices; and Output data for the first UE to the group of devices in a physical downlink shared channel (PDSCH) using the one or more SPS resources, wherein the RRC signaling, the DCI or the PDSCH includes an identifier of the first UE as a target UE for the one or more second UEs to resend the data.

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