Devices and methods for communication
By aligning DCI sizes with virtual resource blocks and optimizing search spaces, the SDT efficiency is enhanced, addressing alignment and scheduling inefficiencies, and reducing power consumption in RRC_INACTIVE state.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NEC CORP
- Filing Date
- 2024-12-24
- Publication Date
- 2026-07-02
AI Technical Summary
Existing small data transmission (SDT) technologies face challenges in aligning downlink control information (DCI) sizes and efficiently scheduling data transmissions in RRC_INACTIVE state, leading to inefficiencies and potential misalignments.
The proposed solution involves aligning the first size of downlink control information to a second size based on virtual resource blocks, indicating assignment information, and configuring search spaces for SDT, including random access and configured grant transmissions, to enhance SDT efficiency.
This approach achieves DCI size alignment and efficient scheduling, improving communication efficiency and reducing power consumption by allowing larger bandwidth utilization for SDT without transitioning to RRC_CONNECTED state.
Smart Images

Figure CN2024141797_02072026_PF_FP_ABST
Abstract
Description
DEVICES AND METHODS FOR COMMUNICATIONFIELDS
[0001] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for small data transmission (SDT) enhancement.BACKGROUND
[0002] With developments of communication systems, new technologies such as SDT have been proposed. Specifically, the SDT is a transmission for a short data burst in a connectionless state where a device does not need to establish and teardown connections when small amounts of data need to be sent. By means of the SDT procedure, a terminal device does not have to enter a radio resource control (RRC) connected state and may perform data transmission in an inactive state. With the SDT, power consumption and overhead of the terminal device can be reduced.SUMMARY
[0003] In general, embodiments of the present disclosure provide a solution on small data transmission enhancement.
[0004] In a first aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the terminal device to: receive, from a network device, information regarding a frequency resource for a small data transmission; and perform the small data transmission with the network device by monitoring downlink control information associated with the frequency resource, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.
[0005] In a second aspect, there is provided a network device. The network device comprises: a processor configured to cause the terminal device to: transmit, to a terminal device, information regarding a frequency resource for a small data transmission; and transmit downlink control information associated with the frequency resource to the terminal device for the small data transmission, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.
[0006] In a third aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the terminal device to: receive, from a network device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and transmit, to the network device, a CQI based on the at least one of the configuration information or the indication information via at least one of: a medium access control control element (MAC CE) , or uplink control information.
[0007] In a fourth aspect, there is provided a network device. The network device comprises: a processor configured to cause the network device to: transmit, to a terminal device, at least one of configuration information or indication information for a CQI reporting for a small data transmission; and receive, from the terminal device, a CQI via at least one of: a MAC CE, or uplink control information.
[0008] In a fifth aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the terminal device to: receive, from a network device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; monitor a physical downlink control channel in the search space based on the configuration; and perform the small data transmission to the network device based on the monitoring.
[0009] In a sixth aspect, there is provided a network device. The network device comprises: a processor configured to cause the network device to: transmit, to a terminal device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; and receive the small data transmission from the terminal device based on the search space.
[0010] In a seventh aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, information regarding a frequency resource for a small data transmission; and performing the small data transmission with the network device by monitoring downlink control information associated with the frequency resource, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.
[0011] In an eighth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, information regarding a frequency resource for a small data transmission; and transmitting downlink control information associated with the frequency resource to the terminal device for the small data transmission, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.
[0012] In a ninth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, at least one of configuration information or indication information for a CQI reporting for a small data transmission; and transmitting, to the network device, a CQI based on the at least one of the configuration information or the indication information via at least one of: a MAC CE, or uplink control information.
[0013] In a tenth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, at least one of configuration information or indication information for a CQI reporting for a small data transmission; and receiving, from a terminal device, a CQI via at least one of: a MAC CE, or uplink control information.
[0014] In an eleventh aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; monitorring a physical downlink control channel in the search space based on the configuration; and performing the small data transmission to the network device based on the monitoring.
[0015] In a twelfth aspect, there is provided a communication method performed by a network device. The method comprises: transmitting, to a terminal device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; and receiving the small data transmission from the terminal device based on the search space.
[0016] In a thirteenth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the seventh, eighth, ninth, tenth, eleventh, or twelfth aspect.
[0017] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Through the more detailed description of some example embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
[0019] FIG. 1 illustrates an example communication environment in which example embodiments of the present disclosure can be implemented;
[0020] FIG. 2 illustrates a signaling flow of small data transmission in accordance with some embodiments of the present disclosure;
[0021] FIG. 3 illustrates another signaling flow of small data transmission in accordance with some embodiments of the present disclosure;
[0022] FIG. 4 illustrates a schematic diagram of a MAC CE for reporting CQI in accordance with some embodiments of the present disclosure;
[0023] FIG. 5 illustrates another signaling flow of small data transmission in accordance with some embodiments of the present disclosure;
[0024] FIG. 6 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0025] FIG. 7 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure;
[0026] FIG. 8 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0027] FIG. 9 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure;
[0028] FIG. 10 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure;
[0029] FIG. 11 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure; and
[0030] FIG. 12 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0031] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0032] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0033] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0034] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further have ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0035] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0036] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0037] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0038] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0039] As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0040] In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0041] As used herein, the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0042] As used herein, the term “small data transmission (SDT) ” may refer to a procedure allowing data and / or signaling transmission while remaining in RRC_INACTIVE state (i.e. without transitioning to RRC_CONNECTED state) . Specifically, the SDT is a transmission for a short data burst in a connectionless state where a device does not need to establish and teardown connections when small amounts of data need to be sent. The term “uplink grant” used herein may refer to an indication that is used to indicate an uplink transmission is scheduled. The term “downlink control information (DCI) ” used herein may refer to a dynamic physical layer control message from the network to UE. The term “medium access control (MAC) control element (CE) ” used herein may refer to a structure carrying control information.
[0043] As used herein, the term “configured grant (CG) -SDT” may refer to an SDT using the CG resource (s) . The term “random access (RA) -SDT” may refer to an SDT using resources obtained by the RA procedure.
[0044] As used herein, the term “mobile-terminated (MT) -SDT” may refer to an SDT triggered by downlink (DL) signal. The MT-SDT may be a paging-triggered SDT. The MT-SDT may be a CG-SDT or an RA-SDT. MT-SDT triggering mechanism for UEs in RRC_INACTIVE may support random access channel (RACH) procedure based and CG-SDT procedure-based UL response. The MT-SDT procedure for initial DL data reception and subsequent UL or DL data transmissions in RRC_INACTIVE. The term “mobile-originated (MO) -SDT” may refer to an SDT triggered by UL signal. The MO-SDT may be a CG-SDT or an RA-SDT.
[0045] A used herein, the term “RRC connected state” or “RRC connected mode” used herein may refer to a state in which service radio bearer and data radio bearer are allocated for the terminal device. The term “RRC idle state” or “RRC idle mode” used herein may refer to a state where the terminal device is switched on but does not have any established RRC connection. The term “RRC inactive state” or “RRC inactive mode” used herein may refer to a state where there is an RRC connection that has been suspended.
[0046] FIG. 1 illustrates a schematic diagram of an example communication environment 100 in which example embodiments of the present disclosure can be implemented. In the communication environment 100, a plurality of communication devices, including a terminal device 110 and a network device 120, can communicate with each other.
[0047] In the example of FIG. 1, the terminal device 110 may be a UE and the network device 120 may be a base station serving the UE. The serving area of the network device 120 may be called a cell 102.
[0048] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100 may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell 102, and one or more additional cells may be deployed in the communication environment 100. It is noted that although illustrated as a network device, the network device 120 may be another device than a network device. Although illustrated as a terminal device, the terminal device 110 may be other device than a terminal device.
[0049] In the following, for the purpose of illustration, some example embodiments are described with the terminal device 110 operating as a UE and the network device 120 operating as a base station. However, in some example embodiments, operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
[0050] In some example embodiments, if the terminal device 110 is a terminal device and the network device 120 is a network device, a link from the network device 120 to the terminal device 110 is referred to as a downlink (DL) , while a link from the terminal device 110 to the network device 120 is referred to as an uplink (UL) . In DL, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . In UL, the terminal device 110 is a TX device (or a transmitter) and the network device 120 is a RX device (or a receiver) .
[0051] The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0052] The terminal device 110 may support an SDT such as CG-SDT and / or RA-SDT. For CG-SDT, the terminal device 110 may be provided a UE specific Search Space (USS) set by SearchSpace, or a Common Search Space (CSS) set by sdt-SearchSpace, to monitor Physical Downlink Control Channel (PDCCH) for detection of DCI format 0_0 with cell cyclic redundancy check (CRC) scrambled by cell radio network temporary identifier (C-RNTI) or configured scheduling radio network temporary identifier (CS-RNTI) for scheduling Physical Uplink Shared channel (PUSCH) transmission or of DCI format 1_0 with CRC scrambled by C-RNTI for scheduling physical downlink shared channel (PDSCH) receptions. The terminal device 110 may assume that the Demodulation Reference Signal (DMRS) antenna port associated with the PDCCH receptions, the DMRS antenna port associated with the PDSCH receptions, and the Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block associated with the PUSCH transmission are quasi co-located with respect to average gain and quasi co-location 'typeA' or 'typeD' properties. The terminal device 110 may transmit a physical uplink control channel (PUCCH) with Hybrid Automatic Repeat reQuest -Acknowledgment (HARQ-ACK) information associated with the PDSCH receptions using a same spatial domain transmission filter as for the last PUSCH transmission.
[0053] For RA-SDT, the terminal device 110 may be provided by sdt-SearchSpace a CSS set to monitor, after contention resolution, PDCCH for detection of a DCI format 0_0 or DCI format 1_0 with CRC scrambled by C-RNTI for scheduling respective PUSCH transmissions or PDSCH receptions. Otherwise, if the terminal device 110 is not provided sdt-SearchSpace, the terminal device 110 may monitor PDCCH according to a Type1-PDCCH CSS set. The terminal device 110 may assume that the DMRS antenna port associated with the PDCCH receptions, the DMRS antenna port associated with the PDSCH receptions, and the SS / PBCH block associated with the physical random access channel (PRACH) transmission are quasi co-located with respect to average gain and quasi co-location 'typeA' or 'typeD' properties.
[0054] MT-SDT operation over initial bandwidth part (BWP) restricts DL MT-SDT transmissions to the bandwidth of control resource set (CORESET) 0 in RRC_INACTIVE state. In addition, MT-SDT BWP restriction with no DL quality feedback results in smaller, more conservative transport block (TB) allocations in the downlink at low modulation and coding scheme (MCS) values. For larger data volumes, smaller TB size (TBS) translate to a higher number of subsequent transmissions. In some mechanisms, it is proposed to remove the CORESET 0 restriction for DL BWP for SDT from or after first DL MT-SDT data. However, if the restriction for CORESET 0 is removed, some issues need to be considered, including UE capability, DCI size alignment, or the like. For example, since different size for frequency domain resource may be used, DCI size may be different. If different DCI sizes are used, DCI alignment needs to be considered. In addition, if a common frequency resource is used for the SDT, how to configure resource and indicate the resource need to be considered.
[0055] In order to solve at least part of the above problems or other potential problems, a solution on enhancing SDT is proposed. In particular, a terminal device receives, from a network device, information regarding a frequency resource for a small data transmission. The terminal device thus performs the small data transmission with the network device by monitoring downlink control information associated with the frequency resource. A first size of the downlink control information is aligned to a second size based on at least one virtual resource block. Assignment information of the at least one virtual resource block is indicated to the terminal device. In this way, DCI size alignment may be achieved.
[0056] Reference is made to FIG. 2, which illustrates a signaling flow 200 of small data transmission in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 200 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
[0057] In operation, the network device 120 transmits (210) , to the terminal device 110, information regarding a frequency resource for a small data transmission. The terminal device 110 receives (220) the information. For example, since the different size for frequency resource may be used, DCI size may be different, the frequency resource may indicate size related information.
[0058] In some embodiments, the information regarding the frequency resource includes an indication of removing a size restriction of control resource set for the small data transmission. For example, the indication may indicate a removing of a size restriction of CORESET 0 for the SDT. The removing of the size restriction may be used for DCI scrambled by C-RNTI. In some embodiments, the size restriction is removed in response to receiving the indication of removing the size restriction. Then the size of such DCI may be allowed to be aligned.
[0059] The network device 120 may transmit, to the terminal device 110, the indication that the new function (that is, the removing CORESET 0 restriction) may be used. Once the indication is received, the restriction may be removed. The indication may be informed by DCI, RRC message or MAC CE. In the way, the terminal device 110 may be indicted about the removing CORESET 0 restriction.
[0060] In an embodiment, the indication may be a flag introduced in DCI format 1_0, for example, 0 referring to a legacy size, 1 meaning that restriction is removed. It is to be understood that example value or field for the indication is only for the purpose of illustration, without suggesting any limitation. Alternatively, the indication may indicate or define a new rule. In some embodiments, the indication of removing the size restriction indicates to use an initial downlink bandwidth part for at least one of: a subsequent transmission of the small data transmission, or a downlink transmission corresponding to downlink control information scrambled by C-RNTI. That is, the new rule may be that the new function may be used during the subsequent transmission of SDT or the new function may be used for the first DL transmission that the corresponding DCI scrambled by C-RNTI.
[0061] As mentioned, the indication of removing restriction of CORESET 0 may be indicated by DCI, for example DCI format 1_0. DCI format 1_0 may be used for the scheduling of PDSCH in one DL cell. The following information may be transmitted by means of the DCI format 1_0 with CRC scrambled by C-RNTI or CS-RNTI or MCS-C-RNTI: Identifier for DCI formats, -1 bits. The value of this bit field is always set to 1, indicating a DL DCI format. Frequency domain resource assignment, bits where is given by: - the size of CORESET 0 if CORESET 0 is configured for the cell; and / or -the size of initial DL bandwidth part if CORESET 0 is not configured for the cell.
[0062] The DCI format 1_0 monitored in a common search space may be determined according to a standard based on If DCI format 0_0 is monitored in common search space and if the number of information bits in the DCI format 0_0 prior to padding is less than the payload size of the DCI format 1_0 monitored in common search space for scheduling the same serving cell, a number of zero padding bits are generated for the DCI format 0_0 until the payload size equals that of the DCI format 1_0. If DCI format 0_0 is monitored in common search space and if the number of information bits in the DCI format 0_0 prior to truncation is larger than the payload size of the DCI format 1_0 monitored in common search space for scheduling the same serving cell, the bit-width of the frequency domain resource assignment field in the DCI format 0_0 is reduced by truncating the first few most significant bits such that the size of DCI format 0_0 equals the size of the DCI format 1_0.
[0063] In some embodiments, the network device 120 may transmit to the terminal device 110, capability information of the network device 120. The capability information may indicate a support of removing the size restriction of the control resource set. For example, a new parameter indicating whether removing restriction is supported / enabled by the network needs to be introduced. This parameter may be transmitted to the terminal device 110 by system information block 1 (SIB1) and / or RRC message, or any other suitable message or signaling.
[0064] Likewise, the terminal device 110 may transmit capability of the terminal device 110 to the network device, to indicate a support of removing the size restriction of the control resource set. That is, UE capability indicating whether the terminal device 110 supporting removing CORESET 0 restriction may be introduced and indicated to the network. For this capability, if SDT is triggered, the terminal device 110 may indicate the network device 120 via a message associated with a random access procedure, such as Msg1 or Msg3.
[0065] In some embodiments, if Msg1 is used, PRACH resource may be used. Like other features, a new feature may be introduced for RACH partition. If Msg3 is used, a new logical channel identifier (LCID) for common control channel (CCCH) message may be introduced to indicate such UE capability. Alternatively, the network device 120 may obtain the capability of the terminal device 110 by retrieving context of the terminal device from another network device previously serving the terminal device 110. For example, the network device 120 may obtain the UE capability by retrieving UE context from a last serving gNB. In this way, the network can be informed about whether the terminal device 110 supports the restriction removing of the CORESET 0.
[0066] The network device 120 transmits (230) , to the terminal device 110, downlink control information associated with the frequency resource to the terminal device 110 for the small data transmission. The terminal device 110 performs (240) the small data transmission with the network device 120 by monitoring downlink control information associated with the frequency resource. For example, the terminal device 110 may monitor the DCI with the first size in a CSS for the SDT.
[0067] A first size of the downlink control information is aligned to a second size based on at least one virtual resource block. The at least one virtual resource block may include a set of contiguously allocated virtual resource blocks. For example, the network device 120 indicates assignment information of the at least one virtual resource block (referred to as resource block assignment information) to the terminal device 110. The first size is aligned to the second size based on the assignment information. In other words, in order to align DCI size with legacy DCI 1_0, the resource block assignment information may be indicted to a scheduled UE. For example, a set of contiguously allocated virtual resource blocks may be indicated to the scheduled UE.
[0068] In some embodiments, the first size of the DCI in a CSS applying to the frequency resource with a third size is aligned with the second size based on the at least one virtual resource block. The second size of DCI in the CSS applies to at least one of: an initial BWP with a size of a CORESET such as CORESET 0, or an initial BWP with a size of initial DL BWP. The frequency resource with the third size may include at least one of: an initial BWP with a size of an initial DL BWP, a separate / dedicated initial BWP configured for the small data transmission, or a common frequency resource (CFR) configured for the small data transmission.
[0069] For example, when initial DL BWP size is used, in order to align DCI 1_0 size with legacy DCI 1_0 size (size of COREST 0) , virtually allocated resource block may be used. If CORESET 0 is configured, each resource block K may be the maximum value from set {1, 2, 4, 8} which satisfies If CORESET 0 is not configured, initial DL BWP is used, each resource block K may be 1.
[0070] A starting resource block is Alength in terms of virtually contiguously allocated resource blocks is
[0071] If the DCI size for DCI format 1_0 in USS is derived from the size of DCI format 1_0 in CSS but applied to an active BWP with size of adownlink type 1 resource block assignment field consists of a resource indication value (RIV) corresponding to a starting resource block and a length in terms of virtually contiguously allocated resource blocks where is given by -the size of CORESET 0 if CORESET 0 is configured for the cell; and / or -the size of initial DL bandwidth part if CORESET 0 is not configured for the cell.
[0072] The resource indication value is defined by: if then else where and where L′RBsshall not exceed
[0073] If K is the maximum value from set {1, 2, 4, 8} which satisfies otherwise K = 1. Where, refers to an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part, refers to an initial bandwidth part with a size of a whole initial downlink bandwidth part.
[0074] If necessary, padding or truncation shall be applied to the DCI formats according to the following steps executed in the order below: Determine DCI format 0_0 monitored in a common search space according to is the size of the initial UL bandwidth part. Determine DCI format 1_0 monitored in a common search space according to is given by -the size of CORESET 0 if CORESET 0 is configured for the cell; and / or -the size of initial DL bandwidth part if CORESET 0 is not configured for the cell. Determine DCI format 1_0 monitored in a common search space according to is the size of the whole initial bandwidth part when removing restriction for the size of CORESET 0 is enabled.
[0075] In the way, the size of the DCI can be aligned in advance according to the frequency resource. Size misaligning may thus be avoided through the above methods. Thus, the efficiency and effectiveness of communication transmissions can be improved.
[0076] Alternatively, or in addition, the information regarding the frequency resource for the SDT may include a common frequency resource (CFR) configured for the small data transmission, and / or an initial BWP configured for the small data transmission. That is, new CFR and / or additional initial BWP may be introduced for SDT. For example, CFR for SDT and / or dedicated or separate initial BWP for SDT may be introduced to allocate larger resource to the terminal device 110. In this way, a larger bandwidth may be used for the SDT, and DL data may be efficiently scheduled.
[0077] In some embodiments, the common frequency resource or the initial bandwidth part configured for the small data transmission fully or partially includes an initial bandwidth part with a cell defining synchronization signal (CD-SSB) . For example, CFR for SDT may be configured by SIB1, which may fully or partially include initial BWP with CD-SSB. For another example, dedicated / separate initial BWP may be configured by SIB1, which may fully or partially include initial BWP with CD-SSB. Location and bandwidth may be configured to indicate location position and bandwidth of the frequency domain resource. Some other parameters may also be configured, such as CORESET, search space.
[0078] In some example embodiments, the terminal device 110 may transmit, capability information of the terminal device 110, to the network device 120. The capability information may indicate a support of using a common frequency resource for a small data transmission, and / or a support of using a dedicated or separate initial bandwidth part for a small data transmission. The capability information may be transmitted via a message associated with the random access procedure, such as Msg1 or Msg3. In this way, the network may be informed that the CFR or dedicated or separate initial BWP may be used by the terminal device 110 for SDT.
[0079] As discussed, the first size of the DCI in a CSS applying to the frequency resource with a third size is aligned with the second size of DCI based on the at least one virtual resource block. The second size of DCI in the CSS may be applied to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part. In embodiments where the information of the frequency resource indicates a CFR for the SDT, the frequency resource with the third size may be a common frequency resource configured for the small data transmission. In embodiments where the information of the frequency resource indicates the dedicated initial BWP for the SDT, the frequency resource with the third size may be a dedicated or separate initial BWP configured for the small data transmission.
[0080] Specifically, if dedicated / separate initial BWP is introduced, in order to align DCI size with legacy DCI 1_0, the resource block assignment information indicates to a scheduled terminal device 110 such as scheduled UE a set of contiguously allocated virtual resource blocks.
[0081] If dedicated / separate initial BWP is configured, when the DCI size for DCI format 1_0 in CSS applying to the dedicated initial BWP is derived from the size of DCI format 1_0 in CSS applying to the initial BWP with size of CORESRT 0 or the size of initial DL BWP if CORESRT 0 is not configured adownlink type 1 resource block assignment field consists of a resource indication value (RIV) corresponding to a starting resource block and a length in terms of virtually contiguously allocated resource blocks where is given by -the size of CORESET 0 if CORESET 0 is configured for the cell, or -the size of initial DL bandwidth part if CORESET 0 is not configured for the cell.
[0082] The resource indication value is defined by: if then else where and where L′RBsshall not exceed
[0083] If K is the maximum value from set {1, 2, 4, 8} which satisfies otherwise K = 1.
[0084] If common frequency resource is introduced, in order to align DCI size with legacy DCI 1_0, the resource block assignment information indicates to a scheduled terminal device 110 such as scheduled UE a set of contiguously allocated virtual resource blocks.
[0085] If common frequency resource for SDT is configured, when the DCI size for DCI format 1_0 in USS is derived from the size of DCI format 1_0 in CSS applying to the common frequency resource NCFRis derived from the size of DCI format 1_0 in CSS applying to the initial BWP with size of CORESRT 0 or the size of initial DL BWP if CORESRT 0 is not configured adownlink type 1 resource block assignment field consists of a resource indication value (RIV) corresponding to a starting resource block and a length in terms of virtually contiguously allocated resource blocks where is given by -the size of CORESET 0 if CORESET 0 is configured for the cell, or -the size of initial DL bandwidth part if CORESET 0 is not configured for the cell.
[0086] The resource indication value is defined by: if then else where and where L′RBsshall not exceed
[0087] If K is the maximum value from set {1, 2, 4, 8} which satisfies otherwise K = 1.
[0088] Example alignment or calculation regarding the DCI size have been described. It is to be understood that these alignment approaches or calculations are only for the purpose of illustration, without suggesting any limitation. Any suitable calculations, parameters, values or rules may be applied for the DCI size alignment. Embodiments of the present disclosure are not limited in this regard.
[0089] In this manner, a larger bandwidth may be used for the SDT. DCI size alignment may be achieved with the larger bandwidth for SDT. Therefore, DL data may be efficiently scheduled.
[0090] As mentioned, MT-SDT operation over initial bandwidth part (BWP) restricts DL MT-SDT transmissions to the bandwidth of CORESET 0 in RRC_INACTIVE state. In some mechanism, it is proposed to introduce CQI in Message 3 or MsgA. However, if CQI report is used, how to report the CQI needs to be discussed.
[0091] In order to solve at least part of the above problems or other potential problems, a solution on enhancing SDT is proposed. In particular, a terminal device receives, from a network device, configuration information or indication information for a CQI reporting for a small data transmission. The terminal device transmits, to the network device, a CQI based on the configuration information or the indication information via at least one of: a MAC CE, or uplink control information. In this way, the network device may schedule based on the CQI reporting.
[0092] FIG. 3 illustrates a signaling flow 300 of small data transmission in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 300 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
[0093] As shown, the network device 120 transmits (310) , to the terminal device 110, at least one of configuration information or indication information for CQI reporting for SDT. The terminal device 110 receives (320) the at least one of the configuration information or the indication information. For example, the network device 120 may determine the configuration information or indication information for the CQI reporting. The network device 120 transmits (310) the determined configuration information or indication information to the terminal device 110.
[0094] The terminal device 110 transmits (330) , to the network device 120, a CQI based on the at least one of the configuration information or the indication information. The network device 120 receives (340) the CQI. For example, the CQI may be via a MAC CE and / or UCI.
[0095] In some embodiments, the configuration information for CQI reporting may include but not be limited to a resource for CQI reporting, a periodicity for CQI reporting, a dynamic or semi-static type of CQI reporting, or an offset corresponding to dynamic or semi-static CQI reporting. For example, the configuration information may be a RRC message including the above information or parameter for the CQI reporting. The network device 120 may configure the CQI reporting periodicity. The corresponding reporting parameters such as the period of the CQI reporting may be configured by SIB1, RRC message or any other suitable message or signaling. It is to be understood that these configurations are only for the purpose of illustration, without suggesting any limitation. Some of these configurations may be specified or predefined instead.
[0096] In some embodiments, the CQI reporting may be requested by the network device 120. For example, the indication information from the network device 120 may include a request for the CQI for the SDT. That is, the network device 120 may transmit, to the terminal device 110, the request (or request information) for the CQI for the SDT. In response to receiving (320) the indication information including the request, the terminal device 110 may transmit (330) the CQI to the network device 120. Alternatively, in some embodiments, the terminal device 110 may transmit (330) the CQI to the network device 120 without receiving a request for CQI.
[0097] The network device 120 may request the terminal device 110 to report CQI by Msg2, DCI or any other suitable message or signaling. For example, in MAC RAR, CQI request in UL grant of MAC RAR may be used. For example, 0 means that CQI may be reported by Msg3, while 1 means that CQI may not be reported by Msg3, or the other way around. If CQI reporting is enabled, CSI request (field) may be used for CQI reporting, with 0 meaning the CQI is not reported, and 1 meaning the CQI is reported, or the other way around. If CQI reporting is not enabled, CSI request field may be reserved. In some embodiments, the CQI may be requested by DCI. For example, a CQI request may be added in DCI 1_0.
[0098] By way of example, the measured CQI may be reported by UCI such as UCI on PUSCH. Some configuration information related to UCI reporting may be configured for the terminal device 110, such as a dynamic or semi-static way for CQI reporting, or only semi-static way for CQI reporting, and / or a betaoffset corresponding to dynamic or semi-static CQI reporting. UCI related parameters or UCI configuration for CQI reporting may be configured by SIB1 or any other suitable message or signaling. For CG-SDT, if USS is not configured, CSS may be used. CQI reporting is thus needed. For example, uci-OnPUSCH in ConfiguredGrantConfig may be used for CG-SDT.
[0099] The CQI may alternatively be included in a MAC CE. FIG. 4 illustrates an example MAC CE 400 including a field 410 for CQI. The field 410 may include 4 bits or any other suitable bits for CQI reporting. Alternatively, or in addition, in some embodiments, a new LCID may be allocated for this MAC CE for CQI reporting.
[0100] In an embodiment, first priority of the MAC CE including the CQI is higher than second priority of a MAC CE for power headroom report (PHR) and lower than third priority of a MAC CE for buffer status report (BFR) . Alternatively, in another embodiment, first priority of the MAC CE comprising the CQI is lower than second priority of a MAC CE for power headroom report and higher than third priority of a MAC CE for buffer status report. In this way, different priority may be assigned to different MAC CEs.
[0101] It is to be understood that the illustrated format of MAC CE carrying the CQI is only for the purpose of illustration, without suggesting any limitation. Any suitable message or message format may be used for the CQI reporting. Scope of embodiments are not limited in this regard.
[0102] The terminal device 110 may transmit, to the network device 120, capability information of the terminal device 110. The capability information indicates a support of CQI reporting. That is, a new UE capability about whether the UE supports CQI reporting needs to be introduced. Once the network device 120 configures the CQI reporting resource, such as PUCCH and / or PUSCH, and the terminal device 110 supports the CQI reporting, the terminal device 110 may report the CQI based on the configured periodicity, network CQI request, or any other suitable parameter or conditions.
[0103] By reporting the CQI via PUSCH or MAC CE, the network device 120 may receive the CQI. The network thus may schedule resources for SDT based on the reported CQI. Based on the scheduled resources for SDT, the terminal device 110 performs the SDT to the network device 120. For example, the terminal device 110 may perform the SDT to the network device 120 using UCI on a PUSCH or other suitable resources configured by the network device 120. The network device 120 receives the SDT.
[0104] In this manner, with the CQI reporting, the network may schedule based on the reported CQI. The SDT may thus be enhanced.
[0105] According to embodiments of the present disclosure, a further solution on SDT enhancement has been proposed. In the solution, a network device transmits, to a terminal device, a configuration of a search space specific for the terminal device. The search space is used for an SDT, such as a RA-SDT, a CG-SDT, or the like. The terminal device monitors a PDCCH in the search space based on the configuration of the search space. The terminal device thus performs the SDT to the network device based on the monitoring.
[0106] FIG. 5 illustrates a signaling flow 500 of small data transmission in accordance with some embodiments of the present disclosure. For the purposes of discussion, the signaling flow 500 will be discussed with reference to FIG. 1, for example, by using the terminal device 110 and the network device 120.
[0107] In operation, the network device 120 transmits (510) , to the terminal device 110, a configuration of a search space specific for the terminal device 110. Correspondingly, the terminal device 110 receives (520) the configuration. The search space specific to the terminal device 110 may be referred to as a UE specific search space or USS. The search space is used for an SDT, such as a RA-SDT, a CG-SDT, or the like. The terminal device 110 monitors (530) a PDCCH in the search space based on the configuration of the search space. The terminal device 110 thus performs (540) the SDT to the network device 120 based on the monitoring. The network device 120 receives (550) the SDT from the terminal device 110 accordingly. The network device 120 may also transmit an SDT to the terminal device 110 based on the USS.
[0108] In some embodiments, for CG-SDT, the terminal device 110 may monitor (530) PDCCH scrambled by C-RNTI in USS or CSS. For RA-SDT, CSS may be used. With the configuration of the search space specific to the terminal device 110 according to embodiments of the present disclosure, the configured search space such as USS may be used for RA-SDT. In this way, the RA-SDT may not be restricted to CSS.
[0109] In some embodiments, the PDCCH may be scrambled by C-RNTI in the configured search space. That is, once USS is configured, the terminal device 110 may monitor (530) the PDCCH scrambled by C-RNTI in USS.
[0110] If the terminal device 110 monitors PDCCH DCI 1_0 in USS, the DL BWP may be the initial DL BWP. That is, the bandwidth is not restricted if the terminal device 110 monitors PDCCH in USS. In this manner, the scheduled bandwidth for the SDT may not be restricted.
[0111] In some embodiments, the configuration of the search space is included in an RRC message such as a RRC reconfiguration message or a new RRC message. That is, USS may be configured by RRC reconfiguration message or a new RRC message. Alternatively, in some embodiments, the configuration of the search space may be included in a MAC CE such as a new MAC CE. That is, USS may be configured by MAC CE. The configuration of the search space may alternatively be included in a message associated with a random access procedure, such as Msg4 or a new MAC CE associated with the random access procedure. It is to be understood that these example messages for the configuration of USS are only for the purpose of illustration, without suggesting any limitation. Any suitable message or signaling may be used for the USS configuration.
[0112] It is to be understood that the signaling flows 200, 300 and / or 500 may be applied separately, or in any suitable combination. With the signaling flows 200, 300 and / or 500, the SDT such as MT-SDT may be enhanced.
[0113] FIG. 6 illustrates a flowchart of a communication method 600 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the terminal device 110 in FIG. 1.
[0114] At block 610, the terminal device 110 receives, from a network device, information regarding a frequency resource for a small data transmission.
[0115] At block 620, the terminal device 110 performs the small data transmission with the network device by monitoring downlink control information associated with the frequency resource, . A first size of the downlink control information is aligned to a second size based on at least one virtual resource block. Assignment information of the at least one virtual resource block is indicated to the terminal device.
[0116] In some example embodiments, the information regarding the frequency resource indicates at least one of: an indication of removing a size restriction of control resource set for the small data transmission, a common frequency resource configured for the small data transmission, or an initial bandwidth part configured for the small data transmission.
[0117] In some example embodiments, the removing of the size restriction is used for downlink control information scrambled by cell-radio network temporary identifier (C-RNTI) .
[0118] In some example embodiments, the size restriction is removed in response to receiving the indication of removing the size restriction.
[0119] In some example embodiments, the indication of removing the size restriction indicates to use an initial downlink bandwidth part for at least one of: a subsequent transmission of the small data transmission, or a downlink transmission corresponding to downlink control information scrambled by cell-radio network temporary identifier (C-RNTI) .
[0120] In some example embodiments, the method 600 further comprises: receiving, from the network device, capability information of the network device, the capability information indicating a support of removing the size restriction of the control resource set.
[0121] In some example embodiments, the common frequency resource or the initial bandwidth part configured for the small data transmission fully or partially comprises an initial bandwidth part with a cell defining synchronization signal (CD-SSB) .
[0122] In some example embodiments, the method 600 further comprises: transmitting, to the network device, capability information of the terminal device, the capability information indicating at least one of: a support of removing a size restriction of a control resource set for a small data transmission, a support of using a common frequency resource for a small data transmission, or a support of using a dedicated or separate initial bandwidth part for a small data transmission.
[0123] In some example embodiments, the capability information of the terminal device is transmitted via a message associated with a random access procedure.
[0124] In some example embodiments, the first size of the downlink control information in a common search space applying to the frequency resource with a third size is aligned with the second size based on the at least one virtual resource block. The second size of downlink control information in the common search space applies to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part. The frequency resource with the third size comprises at least one of: an initial bandwidth part with a size of a whole initial downlink bandwidth part, an initial bandwidth part configured for the small data transmission, or a common frequency resource configured for the small data transmission.
[0125] In some example embodiments, the assignment information of the at least one virtual resource block at least indicates a length of the at least one virtual resource block, the length being k*N, N being a positive integer less than or equal to the second size, k being less than or equal to a quotient of the third size being divided by the second size.
[0126] In some example embodiments, the terminal device 110 may monitor the downlink control information with the first size in a common search space for the small data transmission.
[0127] FIG. 7 illustrates a flowchart of a communication method 700 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the network device 120 in FIG. 1.
[0128] At block 710, the network device 120 transmits, to a terminal device, information regarding a frequency resource for a small data transmission.
[0129] At block 720, the network device 120 transmits downlink control information associated with the frequency resource to the terminal device for the small data transmission. A first size of the downlink control information is aligned to a second size based on at least one virtual resource block. Assignment information of the at least one virtual resource block is indicated to the terminal device.
[0130] In some example embodiments, the information regarding the frequency resource indicates at least one of: an indication of removing a size restriction of a control resource set for the small data transmission, a common frequency resource configured for the small data transmission, or an initial bandwidth part configured for the small data transmission.
[0131] In some example embodiments, the size restriction is removed in response to transmitting the indication of removing the size restriction.
[0132] In some example embodiments, the method 700 further comprises: transmitting, to the terminal device, capability information of the network device, the capability information indicating a support of removing the size restriction of the control resource set.
[0133] In some example embodiments, the method 700 further comprises: receiving, from at least one of: the terminal device, or a further network device, capability information of the terminal device, the capability information indicating at least one of: a support of removing a size restriction of a control resource set for a small data transmission, a support of using a common frequency resource configured for a small data transmission, or a support of using a dedicated or separate initial bandwidth part configured for a small data transmission.
[0134] In some example embodiments, the method 700 further comprises: aligning the first size of the downlink control information in a common search space with the second size, the first size of the downlink control information applying to the frequency resource with a third size. The second size of downlink control information in the common search space applies to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part. The frequency resource with the third size comprises at least one of: an initial bandwidth part with a size of a whole initial downlink bandwidth part, an initial bandwidth part configured for the small data transmission, or a common frequency resource configured for the small data transmission.
[0135] In some example embodiments, the assignment information of the at least one virtual resource block at least indicates a length of the at least one virtual resource block, the length being k*N, N being a positive integer less than or equal to the second size, k being less than or equal to a quotient of the third size being divided by the second size.
[0136] FIG. 8 illustrates a flowchart of a communication method 800 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 800 will be described from the perspective of the terminal device 110 in FIG. 1.
[0137] At block 810, the terminal device 110 receives, from a network device, at least one of configuration information or indication information for a CQI reporting for a small data transmission. At block 820, the terminal device 110 transmits, to the network device, a CQI based on the at least one of the configuration information or the indication information via at least one of: a MAC CE, or uplink control information.
[0138] In some example embodiments, the configuration information comprises at least one of: a resource for CQI reporting, a periodicity for CQI reporting, a dynamic or semi-static type of CQI reporting, or an offset corresponding to dynamic or semi-static CQI reporting; and transmitting the CQI to the network device based on the configuration.
[0139] In some example embodiments, the indication information may include a request for the CQI for the small data transmission.
[0140] In some example embodiments, the indication information including the request for CQI is comprised in at least one of: an uplink grant of MAC RAR, or downlink control information.
[0141] In some example embodiments, first priority of the MAC CE comprising the CQI is higher than second priority of a MAC CE for power headroom report and lower than third priority of a MAC CE for buffer status report.
[0142] In some example embodiments, first priority of the MAC CE comprising the CQI is lower than second priority of a MAC CE for power headroom report and higher than third priority of a MAC CE for buffer status report.
[0143] In some example embodiments, the method 800 further comprises: transmitting, to the network device, capability information of the terminal device, the capability information indicating a support of CQI reporting.
[0144] In some example embodiments, the terminal device 110 may perform the small data transmission to the network device using uplink control information on a physical uplink shared channel.
[0145] FIG. 9 illustrates a flowchart of a communication method 900 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 900 will be described from the perspective of the network device 120 in FIG. 1.
[0146] At block 910, the network device 120 transmits, to a terminal device, at least one of: configuration information or indication information for a CQI reporting for a small data transmission. At block 920, the network device 120 receives, from the terminal device, a CQI via at least one of: a MAC CE, or uplink control information.
[0147] In some example embodiments, the configuration information comprises at least one of: a resource for CQI reporting, a periodicity for CQI reporting, a dynamic or semi-static type of CQI reporting, or an offset corresponding to dynamic or semi-static CQI reporting.
[0148] In some example embodiments, the indication information may include a request for the CQI for the small data transmission.
[0149] In some example embodiments, the network device 120 may receive the small data transmission from the terminal device using uplink control information on a physical uplink shared channel.
[0150] In some example embodiments, the method 900 further comprises: receiving, from the terminal device, capability information of the terminal device, the capability information indicating a support of CQI reporting.
[0151] FIG. 10 illustrates a flowchart of a communication method 1000 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1000 will be described from the perspective of the terminal device 110 in FIG. 1.
[0152] At block 1010, the terminal device 110 receives, from a network device, a configuration of a search space specific for the terminal device. The search space is used for a small data transmission. The small data transmission includes at least one of: a random access small data transmission or a configured grant small data transmission.
[0153] At block 1020, the terminal device 110 monitors a physical downlink control channel in the search space based on the configuration.
[0154] At block 1030, the terminal device 110 performs the small data transmission to the network device based on the monitoring.
[0155] In some example embodiments, the configuration of the search space is comprised in at least one of: a radio resource control message, a medium access control control element, or a message associated with a random access procedure.
[0156] In some example embodiments, the physical downlink control channel is scrambled by cell-radio network temporary identifier (C-RNTI) in the search space.
[0157] FIG. 11 illustrates a flowchart of a communication method 1100 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 1100 will be described from the perspective of the network device 120 in FIG. 1.
[0158] At block 1110, the network device 120 transmits, to a terminal device, a configuration of a search space specific for the terminal device. The search space is used for a small data transmission. The small data transmission includes at least one of: a random access small data transmission or a configured grant small data transmission.
[0159] At block 1120, the network device 120 receives the small data transmission from the terminal device based on the search space.
[0160] FIG. 12 is a simplified block diagram of a device 1200 that is suitable for implementing embodiments of the present disclosure. The device 1200 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 1200 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0161] As shown, the device 1200 includes a processor 1210, a memory 1220 coupled to the processor 1210, a suitable transceiver 1240 coupled to the processor 1210, and a communication interface coupled to the transceiver 1240. The memory 1220 stores at least a part of a program 1230. The transceiver 1240 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 1240 may include at least one of a transmitter 1242 and a receiver 1244. The transmitter 1242 and the receiver 1244 may be functional modules or physical entities. The transceiver 1240 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0162] The program 1230 is assumed to include program instructions that, when executed by the associated processor 1210, enable the device 1200 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 11. The embodiments herein may be implemented by computer software executable by the processor 1210 of the device 1200, or by hardware, or by a combination of software and hardware. The processor 1210 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 1210 and memory 1220 may form processing means 1250 adapted to implement various embodiments of the present disclosure.
[0163] The memory 1220 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 1220 is shown in the device 1200, there may be several physically distinct memory modules in the device 1200. The processor 1210 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 1200 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0164] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, information regarding a frequency resource for a small data transmission; and perform the small data transmission with the network device by monitoring downlink control information associated with the frequency resource, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0165] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, information regarding a frequency resource for a small data transmission; and transmit downlink control information associated with the frequency resource to the terminal device for the small data transmission, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0166] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and transmit, to the network device, a channel quality indicator (CQI) based on the at least one of the configuration information or the indication information via at least one of: a medium access control control element (MAC CE) , or uplink control information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0167] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and receive, from the terminal device, a channel quality indicator (CQI) via at least one of: a medium access control control element (MAC CE) , or uplink control information. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0168] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; monitor a physical downlink control channel in the search space based on the configuration; and perform the small data transmission to the network device based on the monitoring. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0169] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit, to a terminal device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; and receive the small data transmission from the terminal device based on the search space. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0170] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0171] According to embodiments of the present disclosure, a first apparatus is provided. The first apparatus comprises means for receiving, from a network device, information regarding a frequency resource for a small data transmission; and means for performing the small data transmission with the network device by monitoring downlink control information associated with the frequency resource, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the first apparatus. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 600. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0172] According to embodiments of the present disclosure, a second apparatus is provided. The second apparatus comprises means for transmitting, to a terminal device, information regarding a frequency resource for a small data transmission; and means for transmitting downlink control information associated with the frequency resource to the terminal device for the small data transmission, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 700. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0173] According to embodiments of the present disclosure, a third apparatus is provided. The third apparatus comprises means for receiving, from a network device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and means for transmitting, to the network device, a channel quality indicator (CQI) based on the at least one of the configuration information or the indication information via at least one of: a medium access control control element (MAC CE) , or uplink control information. In some embodiments, the third apparatus may comprise means for performing the respective operations of the method 800. In some example embodiments, the third apparatus may further comprise means for performing other operations in some example embodiments of the method 800. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0174] According to embodiments of the present disclosure, a fourth apparatus is provided. The fourth apparatus comprises means for transmitting, to a terminal device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and means for receiving, from the terminal device, a channel quality indicator (CQI) via at least one of: a medium access control control element (MAC CE) , or uplink control information. In some embodiments, the fourth apparatus may comprise means for performing the respective operations of the method 900. In some example embodiments, the fourth apparatus may further comprise means for performing other operations in some example embodiments of the method 900. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0175] According to embodiments of the present disclosure, a fifth apparatus is provided. The fifth apparatus comprises means for receiving, from a network device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; means for monitorring a physical downlink control channel in the search space based on the configuration; and means for performing the small data transmission to the network device based on the monitoring. In some embodiments, the fifth apparatus may comprise means for performing the respective operations of the method 1000. In some example embodiments, the fifth apparatus may further comprise means for performing other operations in some example embodiments of the method 1000. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0176] According to embodiments of the present disclosure, a sixth apparatus is provided. The sixth apparatus comprises means for transmitting, to a terminal device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; and means for receiving the small data transmission from the terminal device based on the search space. In some embodiments, the sixth apparatus may comprise means for performing the respective operations of the method 1100. In some example embodiments, the sixth apparatus may further comprise means for performing other operations in some example embodiments of the method 1100. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0177] In summary, embodiments of the present disclosure provide the following aspects.
[0178] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, information regarding a frequency resource for a small data transmission; and perform the small data transmission with the network device by monitoring downlink control information associated with the frequency resource, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.
[0179] In some embodiments, the information regarding the frequency resource indicates at least one of: an indication of removing a size restriction of control resource set for the small data transmission, a common frequency resource configured for the small data transmission, or an initial bandwidth part configured for the small data transmission.
[0180] In some embodiments, the removing of the size restriction is used for downlink control information scrambled by cell-radio network temporary identifier (C-RNTI) .
[0181] In some embodiments, the size restriction is removed in response to receiving the indication of removing the size restriction.
[0182] In some embodiments, the indication of removing the size restriction indicates to use an initial downlink bandwidth part for at least one of: a subsequent transmission of the small data transmission, or a downlink transmission corresponding to downlink control information scrambled by cell-radio network temporary identifier (C-RNTI) .
[0183] In some embodiments, the processor is further configured to cause the terminal device to: receive, from the network device, capability information of the network device, the capability information indicating a support of removing the size restriction of the control resource set.
[0184] In some embodiments, the common frequency resource or the initial bandwidth part configured for the small data transmission fully or partially comprises an initial bandwidth part with a cell defining synchronization signal (CD-SSB) .
[0185] In some embodiments, the processor is further configured to cause the terminal device to: transmit, to the network device, capability information of the terminal device, the capability information indicating at least one of: a support of removing a size restriction of a control resource set for a small data transmission, a support of using a common frequency resource for a small data transmission, or a support of using a dedicated or separate initial bandwidth part for a small data transmission.
[0186] In some embodiments, the capability information of the terminal device is transmitted via a message associated with a random access procedure.
[0187] In some embodiments, the first size of the downlink control information in a common search space applying to the frequency resource with a third size is aligned with the second size based on the at least one virtual resource block, wherein the second size of downlink control information in the common search space applies to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part, and wherein the frequency resource with the third size comprises at least one of: an initial bandwidth part with a size of a whole initial downlink bandwidth part, an initial bandwidth part configured for the small data transmission, or a common frequency resource configured for the small data transmission.
[0188] In some embodiments, the assignment information of the at least one virtual resource block at least indicates a length of the at least one virtual resource block, the length being k*N, N being a positive integer less than or equal to the second size, k being less than or equal to a quotient of the third size being divided by the second size.
[0189] In some embodiments, the processor is further configured to cause the terminal device to: monitor the downlink control information with the first size in a common search space for the small data transmission.
[0190] In an aspect, it is proposed a network device comprising: a processor configured to cause the terminal device to: transmit, to a terminal device, information regarding a frequency resource for a small data transmission; and transmit downlink control information associated with the frequency resource to the terminal device for the small data transmission, where a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.
[0191] In some embodiments, the information regarding the frequency resource indicates at least one of: an indication of removing a size restriction of a control resource set for the small data transmission, a common frequency resource configured for the small data transmission, or an initial bandwidth part configured for the small data transmission.
[0192] In some embodiments, the size restriction is removed in response to transmitting the indication of removing the size restriction.
[0193] In some embodiments, the processor is further configured to cause the network device to: transmit, to the terminal device, capability information of the network device, the capability information indicating a support of removing the size restriction of the control resource set.
[0194] In some embodiments, the processor is further configured to cause the network device to: receive, from at least one of: the terminal device, or a further network device, capability information of the terminal device, the capability information indicating at least one of: a support of removing a size restriction of a control resource set for a small data transmission, a support of using a common frequency resource configured for a small data transmission, or a support of using a dedicated or separate initial bandwidth part configured for a small data transmission.
[0195] In some embodiments, the processor is further configured to cause the network device to: align the first size of the downlink control information in a common search space with the second size, the first size of the downlink control information applying to the frequency resource with a third size, wherein the second size of downlink control information in the common search space applies to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part, and wherein the frequency resource with the third size comprises at least one of: an initial bandwidth part with a size of a whole initial downlink bandwidth part, an initial bandwidth part configured for the small data transmission, or a common frequency resource configured for the small data transmission.
[0196] In some embodiments, the assignment information of the at least one virtual resource block at least indicates a length of the at least one virtual resource block, the length being k*N, N being a positive integer less than or equal to the second size, k being less than or equal to a quotient of the third size being divided by the second size.
[0197] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and transmit, to the network device, a channel quality indicator (CQI) based on the at least one of the configuration information or the indication information via at least one of: a medium access control control element (MAC CE) , or uplink control information.
[0198] In some embodiments, the configuration information comprises at least one of: a resource for CQI reporting, a periodicity for CQI reporting, a dynamic or semi-static type of CQI reporting, or an offset corresponding to dynamic or semi-static CQI reporting; and transmit the CQI to the network device based on the configuration.
[0199] In some embodiments, the indication information includes a request for the CQI for the small data transmission.
[0200] In some embodiments, the indication information including the request for CQI is comprised in at least one of: an uplink grant of a medium access control random access response (MAC RAR) , or downlink control information.
[0201] In some embodiments, first priority of the MAC CE comprising the CQI is higher than second priority of a MAC CE for power headroom report and lower than third priority of a MAC CE for buffer status report.
[0202] In some embodiments, first priority of the MAC CE comprising the CQI is lower than second priority of a MAC CE for power headroom report and higher than third priority of a MAC CE for buffer status report.
[0203] In some embodiments, the processor is further configured to cause the terminal device to: transmit, to the network device, capability information of the terminal device, the capability information indicating a support of CQI reporting.
[0204] In some embodiments, the processor is further configured to cause the terminal device to: perform the small data transmission to the network device using uplink control information on a physical uplink shared channel.
[0205] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, at least one of configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; and receive, from the terminal device, a channel quality indicator (CQI) via at least one of: a medium access control control element (MAC CE) , or uplink control information.
[0206] In some embodiments, the configuration inforamtion comprises at least one of: a resource for CQI reporting, a periodicity for CQI reporting, a dynamic or semi-static type of CQI reporting, or an offset corresponding to dynamic or semi-static CQI reporting.
[0207] In some embodiments, the indication information comprises a request for the CQI for the small data transmission.
[0208] In some embodiments, the processor is further configured to cause the network device to: receive the small data transmission from the terminal device using uplink control information on a physical uplink shared channel.
[0209] In some embodiments, the processor is further configured to cause the network device to: receive, from the terminal device, capability information of the terminal device, the capability information indicating a support of CQI reporting.
[0210] In an aspect, it is proposed a terminal device comprising: a processor configured to cause the terminal device to: receive, from a network device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; monitor a physical downlink control channel in the search space based on the configuration; and perform the small data transmission to the network device based on the monitoring.
[0211] In some embodiments, the configuration of the search space is comprised in at least one of: a radio resource control message, a medium access control control element, or a message associated with a random access procedure.
[0212] In some embodiments, the physical downlink control channel is scrambled by cell-radio network temporary identifier (C-RNTI) in the search space.
[0213] In an aspect, it is proposed a network device comprising: a processor configured to cause the network device to: transmit, to a terminal device, a configuration of a search space specific for the terminal device, the search space being used for a small data transmission, the small data transmission comprising at least one of: a random access small data transmission or a configured grant small data transmission; and receive the small data transmission from the terminal device based on the search space.
[0214] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0215] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0216] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0217] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0218] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0219] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0220] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0221] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0222] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0223] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0224] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0225] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0226] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0227] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0228] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0229] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0230] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0231] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0232] Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0233] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 12. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0234] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0235] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
[0236] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0237] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, information regarding a frequency resource for a small data transmission; andperform the small data transmission with the network device by monitoring downlink control information associated with the frequency resource,wherein a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.2.The terminal device of claim 1, wherein the information regarding the frequency resource indicates at least one of:an indication of removing a size restriction of control resource set for the small data transmission,a common frequency resource configured for the small data transmission, oran initial bandwidth part configured for the small data transmission.3.The terminal device of claim 2, wherein the removing of the size restriction is used for downlink control information scrambled by cell-radio network temporary identifier (C-RNTI) .4.The terminal device of claim 2 or 3, wherein the size restriction is removed in response to receiving the indication of removing the size restriction.5.The terminal device of any of claims 2-4, wherein the indication of removing the size restriction indicates to use an initial downlink bandwidth part for at least one of: a subsequent transmission of the small data transmission, or a downlink transmission corresponding to downlink control information scrambled by cell-radio network temporary identifier (C-RNTI) .6.The terminal device of any of claims 2-5, wherein the processor is further configured to cause the terminal device to:receive, from the network device, capability information of the network device, the capability information indicating a support of removing the size restriction of the control resource set.7.The terminal device of claim 2, wherein the common frequency resource or the initial bandwidth part configured for the small data transmission fully or partially comprises an initial bandwidth part with a cell defining synchronization signal (CD-SSB) .8.The terminal device of any of claims 1-7, wherein the processor is further configured to cause the terminal device to:transmit, to the network device, capability information of the terminal device, the capability information indicating at least one of:a support of removing a size restriction of a control resource set for a small data transmission,a support of using a common frequency resource for a small data transmission, ora support of using a dedicated or separate initial bandwidth part for a small data transmission.9.The terminal device of claim 8, wherein the capability information of the terminal device is transmitted via a message associated with a random access procedure.10.The terminal device of any of claims 1-9, wherein the first size of the downlink control information in a common search space applying to the frequency resource with a third size is aligned with the second size based on the at least one virtual resource block,wherein the second size of downlink control information in the common search space applies to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part, andwherein the frequency resource with the third size comprises at least one of:an initial bandwidth part with a size of a whole initial downlink bandwidth part,an initial bandwidth part configured for the small data transmission, ora common frequency resource configured for the small data transmission.11.The terminal device of claim 10, wherein the assignment information of the at least one virtual resource block at least indicates a length of the at least one virtual resource block, the length being k*N, N being a positive integer less than or equal to the second size, k being less than or equal to a quotient of the third size being divided by the second size.12.The terminal device of any of claims 1-11, wherein the processor is further configured to cause the terminal device to:monitor the downlink control information with the first size in a common search space for the small data transmission.13.A network device comprising:a processor configured to cause the terminal device to:transmit, to a terminal device, information regarding a frequency resource for a small data transmission; andtransmit downlink control information associated with the frequency resource to the terminal device for the small data transmission,wherein a first size of the downlink control information is aligned to a second size based on at least one virtual resource block, and assignment information of the at least one virtual resource block is indicated to the terminal device.14.The network device of claim 13, wherein the information regarding the frequency resource indicates at least one of:an indication of removing a size restriction of a control resource set for the small data transmission,a common frequency resource configured for the small data transmission, oran initial bandwidth part configured for the small data transmission.15.The network device of claim 14, wherein the size restriction is removed in response to transmitting the indication of removing the size restriction.16.The network device of any of claims 14-15, wherein the processor is further configured to cause the network device to:transmit, to the terminal device, capability information of the network device, the capability information indicating a support of removing the size restriction of the control resource set.17.The network device of any of claims 13-16, wherein the processor is further configured to cause the network device to:receive, from at least one of: the terminal device, or a further network device, capability information of the terminal device, the capability information indicating at least one of:a support of removing a size restriction of a control resource set for a small data transmission,a support of using a common frequency resource configured for a small data transmission, ora support of using a dedicated or separate initial bandwidth part configured for a small data transmission.18.The network device of any of claims 13-17, wherein the processor is further configured to cause the network device to:align the first size of the downlink control information in a common search space with the second size, the first size of the downlink control information applying to the frequency resource with a third size,wherein the second size of downlink control information in the common search space applies to at least one of: an initial bandwidth part with a size of a control resource set, or an initial bandwidth part with a size of initial downlink bandwidth part, andwherein the frequency resource with the third size comprises at least one of:an initial bandwidth part with a size of a whole initial downlink bandwidth part,an initial bandwidth part configured for the small data transmission, ora common frequency resource configured for the small data transmission.19.The network device of claim 18, wherein the assignment information of the at least one virtual resource block at least indicates a length of the at least one virtual resource block, the length being k*N, N being a positive integer less than or equal to the second size, k being less than or equal to a quotient of the third size being divided by the second size.20.A terminal device comprising:a processor configured to cause the terminal device to:receive, from a network device, at least one of: configuration information or indication information for a channel quality indicator (CQI) reporting for a small data transmission; andtransmit, to the network device, a CQI based on the at least one of the configuration information or the indication information via at least one of: a medium access control control element (MAC CE) , or uplink control information.