Devices, methods, and medium for communication
By determining a radio network temporary identifier (RNTI) based on system frame number and RU configuration, the CB-msg3 EDT transmission in NTN networks is optimized, ensuring accurate response detection and reducing signaling overhead.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NEC CORP
- Filing Date
- 2024-11-08
- Publication Date
- 2026-05-15
AI Technical Summary
The challenge in non-terrestrial networks (NTN) is to efficiently transmit contention-based message 3 (CB-msg3) for Early Data Transmission (EDT) without the need for Msg1/Random Access Response (RAR) transactions, which is currently under discussion in 3GPP's NR IoT-NTN phase 3, particularly focusing on reducing uplink and downlink signaling.
A terminal device determines a radio network temporary identifier (RNTI) based on parameters such as system frame number (SFN), carrier identifier, and resource unit (RU) configuration for CB-msg3 EDT transmission, while a network device scrambles the response with this RNTI, enabling accurate detection and response to the CB-msg3 EDT.
This approach allows for unambiguous detection of CB-msg3 EDT responses, reducing ambiguity and enhancing communication efficiency in NTN environments.
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Figure CN2024131129_15052026_PF_FP_ABST
Abstract
Description
DEVICES, METHODS, AND MEDIUM FOR COMMUNICATIONFIELD
[0001] Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices, methods, and a computer readable medium for communication.BACKGROUND
[0002] Non-terrestrial network (NTN) could provide ubiquitous and resilient wireless service beyond the terrestrial network (TN) coverage. The 3rd Generation Partnership Project (3GPP) has started the standardization of NTN since 5G, and NTN will be fully integrated with TN in 6G. In release 19 (Rel-19) new radio (NR) internet of things (IoT) -NTN phase 3, a support of capacity enhancements for uplink is a major topic. In this topic, reducing the necessary uplink and downlink signaling to complete an Early Data Transmission (EDT) by Msg3 transmission without msg1 / Random Access Response (RAR) transaction is under discussion. However, details about the transmission of a contention based message 3 (CB-msg3) EDT should be further studied.SUMMARY
[0003] In general, example embodiments of the present disclosure provide devices, methods, and a computer storage medium for communication.
[0004] In a first aspect, there is provided a terminal device. The terminal device comprises at least one processor configured to cause the terminal device at least to: transmit, to a network device, a CB-msg3 EDT for a random access; determine a radio network temporary identifier (RNTI) based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a system frame number (SFN) where the CB-msg3 EDT is transmitted and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is transmitted, and a first parameter which is determined based on a number of resource units (RU) configured for the CB-msg3 EDT, a subcarrier spacing (SCS) for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and detect a response to the CB-msg3 EDT from the network device based on the RNTI.
[0005] In a second aspect, there is provided a terminal device. The terminal device comprises at least one processor configured to cause the terminal device at least to: receive, from a network device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; determine a resource, from the list of resources, based on a coverage level and a payload size of a CB-msg3 EDT; and transmit, to the network device, the CB-msg3 EDT for a random access based on the resource.
[0006] In a third aspect, there is provided a network device. The network device comprises at least one processor configured to cause the network device at least to: receive, from a terminal device, a CB-msg3 EDT for a random access; determine a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is received and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is received, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and transmit, to the terminal device, a response to the CB-msg3 EDT, wherein the response comprises downlink control information (DCI) with a cyclic redundancy check (CRC) being scrambled by the RNTI.
[0007] In a fourth aspect, there is provided a network device. The network device comprises at least one processor configured to cause the network device at least to: transmit, to a terminal device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; and receive, from the terminal device, a CB-msg3 EDT for a random access on a resource selected from the list of resources, wherein the resource is determined based on a coverage level and a payload size of the CB-msg3 EDT.
[0008] In a fifth aspect, there is provided a method of communication. The method comprises: transmitting, at a terminal device to a network device, a CB-msg3 EDT for a random access; determining a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is transmitted and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is transmitted, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and detecting a response to the CB-msg3 EDT from the network device based on the RNTI..
[0009] In a sixth aspect, there is provided a method of communication. The method comprises: receiving, at a terminal device from a network device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; determining a resource, from the list of resources, based on a coverage level and a payload size of a CB-msg3 EDT; and transmitting, to the network device, the CB-msg3 EDT for a random access based on the resource.
[0010] In a seventh aspect, there is provided a method of communication. The method comprises: receiving, at a network device from a terminal device, a CB-msg3 EDT for a random access; determining a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is received and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is received, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and transmitting, to the terminal device, a response to the CB-msg3 EDT, wherein the response comprises a DCI with a CRC being scrambled by the RNTI.
[0011] In an eighth aspect, there is provided a method of communication. The method comprises: transmitting, at a network device to a terminal device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; and receiving, from the terminal device, a CB-msg3 EDT for a random access on a resource selected from the list of resources, wherein the resource is determined based on a coverage level and a payload size of the CB-msg3 EDT.
[0012] In a ninth 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 any of the fifth to the eighth aspects above.
[0013] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0014] 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:
[0015] FIG. 1A illustrates an example communication network in which some embodiments of the present disclosure can be implemented;
[0016] FIG. 1B illustrates an NTN typical scenario based on transparent payload;
[0017] FIG. 1C illustrates an NTN typical scenario based on regenerative payload;
[0018] FIG. 1D illustrates a comparison of some CDMs with a no-CDM scheme;
[0019] FIGS. 1E-1G illustrate some example schematics for decoding CB-msg3 EDTs from the same or different UEs;
[0020] FIG. 1H illustrates an example for intra-occasion repetition;
[0021] FIG. 1I illustrates an example for inter-occasion group repetition;
[0022] FIG. 2 illustrates a signalling chart illustrating communication process in accordance with some embodiments of the present disclosure;
[0023] FIG. 3 illustrates a signalling chart illustrating communication process in accordance with some embodiments of the present disclosure;
[0024] FIG. 4 illustrates a flowchart of an example method implemented at a terminal device in accordance with some embodiments of the present disclosure;
[0025] FIG. 5 illustrates a flowchart of an example method implemented at a terminal device in accordance with some embodiments of the present disclosure;
[0026] FIG. 6 illustrates a flowchart of an example method implemented at a network device in accordance with some embodiments of the present disclosure;
[0027] FIG. 7 illustrates a flowchart of an example method implemented at a network device in accordance with some embodiments of the present disclosure; and
[0028] FIG. 8 illustrates a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
[0029] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0030] 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.
[0031] 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.
[0032] References in the present disclosure to “one embodiment, ” “an embodiment, ” “an example embodiment, ” and the like indicate that the embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0033] It shall be understood that although the terms “first” and “second” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0034] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. 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. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0035] 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.
[0036] As used herein, the term “communication network” refers to a network following any suitable communication standards or technologies, such as New Radio (NR) , Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Code Divided Multiple Address (CDMA) , Frequency Divided Multiple Address (FDMA) , Time Divided Multiple Address (TDMA) , Frequency Divided Duplexer (FDD) , Time Divided Duplexer (TDD) , Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Divided Multiple Access (OFDMA) , cdma2000, Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Global System for Mobile Communications (GSM) , Narrow Band Internet of Things (NB-IoT) and so on. Furthermore, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, 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) , 5.5G, 5G-Advanced networks, beyond 5G (B5G) , the sixth generation (6G) communication protocols, wireless local network communication protocols such as Institute for Electrical and Electronics Engineers (IEEE) 802.11 and the like, and / or any other protocols either currently known or to be developed in the future. The techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
[0037] As used herein, the term “terminal device” refers to any device having wireless or wired communication capabilities. Examples of 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, device 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 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 has ‘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 be incorporated 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.
[0038] As used herein, 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 satellite, an unmanned aerial systems (UAS) platform, 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.
[0039] In one embodiment, 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 (MN) and the other one may be a secondary node (SN) . The first network device and the second network device may use different radio access technologies (RATs) . In one embodiment, the first network device may be a first RAT device and the second network device may be a second RAT device. In one embodiment, 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 and the second network device. In one embodiment, 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 one embodiment, 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.
[0040] 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.
[0041] The terminal device or the network device may work on several frequency ranges, e.g. frequency range 1 (FR1) (410 MHz –7125 MHz) , frequency range 2 (FR2) (24.25GHz to 71GHz) , frequency band larger than 100GHz 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 device 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.
[0042] 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, or channel emulator.
[0043] 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 1G, 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, 5.5G, 5G-Advanced networks, or 6G networks.
[0044] 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.
[0045] 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 “based at least in part 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.
[0046] 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.
[0047] NB-IoT (Narrowband Internet of Things) represents a novel cellular technology, introduced by 3GPP (Third Generation Partnership Program) in LTE Release 13. The definition of NB-IoT encompasses a variety of key characteristics, including superb coverage, a large number of connections, low power consumption, and low cost. These characteristics render NB-IoT an optimal choice for application scenarios that necessitate extensive coverage and a substantial number of device connections, including smart water metering, smart electricity metering, and environmental monitoring. From a technical specification standpoint, NB-IoT is founded upon E-UTRAN (Evolved Universal Terrestrial Radio Access Network) and is compatible with a half-duplex operational mode. Furthermore, NB-IoT incorporates low-power "sleep" modes (PSM, eDRX) , which streamline terminal design and reduce communication quality requirements. Subsequent releases of 3GPP have further enhanced the capabilities of NB-IoT. As an illustration, in Release 14, the user experience was augmented with the introduction of features such as enhanced positioning accuracy and elevated peak data rates. Furthermore, in Releases 16 and 17, several additional features were introduced to enhance the performance and efficiency of NB-IoT. These include the enhancement of Early Data Transmission (EDT) for mobile terminals, UE group wake-up signals (GWUS) , and Preconfigured Uplink Resource (PUR) transmission. In Release 17, the technology was further extended through the combination with non-terrestrial networks (NTNs) , thereby enhancing its coverage.
[0048] EDT represents a mechanism that facilitates data transmission during random access, thereby enabling the optimization of the transmission of small packets and a notable extension of the battery life of the device. In the context of NB-IoT, the SystemInformationBlockType2-NB comprises a series of parameters, including the edt-Parameters, which are of paramount importance for EDT support. Furthermore, the SystemInformationBlock contains additional configuration data pertinent to NB-IoT, including the NPRACH-ConfigSIB-NB field.
[0049] For the legacy NB-IoT random access procedure, the number of RUs and TBS for EDT are defined in Tables 1-2 below.
[0050] Table 1: EDT TBS for Msg3 NPUSCH with edt-SmallTBS-Enabled set to 'true'
[0051] Table 2: MCS index for Msg3 NPUSCH and EDT
[0052] PUR represents a pivotal component of NB-IoT, enabling the UE to pre-configure uplink resources. This approach effectively reduces signaling overhead and enhances transmission efficiency. For example, npusch-MCS defines the modulation and TBS index of the narrowband physical uplink shared channel (NPUSCH) , while npusch-NumRepetitionsIndex defines the number of repetitions of the NPUSCH. NB-IoT UEs are capable of transmitting and retransmitting data via PUR, which serves to reduce power consumption and latency. The System Information Block (SystemInformationBlockType2-NB) contains configuration data pertaining to PUR, including CP-PUR-EPC and UP-PUR-EPC.
[0053] The Msg3 message for NB-IoT is the third step in the random access process and is used for the UE to send a response to the base station. For example, some terms may be related:
[0054] - Repetition number: the Msg3 message contains a 3-bit repetition number field (repetition number) to indicate the number of repetitions of the message.
[0055] - MCS index: this field contains 3 bits to indicate the TBS (Transmission Block Size) , the modulation method and the number of Resource Units (RUs) used by Msg3.
[0056] - Subcarrier Range: in the NB-IoT system, Msg3 is transmitted using a specific subcarrier range, which is defined by nprach-SubcarrierMSG3-RangeStart and nprach-NumCBRA.
[0057] The ALOHA protocol is an early wireless communication protocol developed by the University of Hawaii in the 1970s. It was originally designed to solve communication problems between the islands of the Hawaiian archipelago. The protocol operates at the data link layer of the open system interconnection (OSI0 model and is classified as one of the Random Access Protocols.
[0058] There are two main versions of ALOHA: Pure ALOHA: Users can transmit data anytime without needing to listen to the channel or synchronize with the communication system. However, if multiple stations transmit simultaneously, there will be a conflict, resulting in the destruction of the frame. If no acknowledgment is received, the stations wait for a random period of time before retransmitting. Slot ALOHA (SA) : This version, proposed by H. Roberts in 1972, divides time into discrete slots to improve efficiency, increase throughput, and reduce collisions. Nodes must synchronize with the communication network and wait for a certain number of time slots before retransmitting in case of conflicts to minimize them.
[0059] In the diversity SA (DSA) system, the transmission of packet replicas aims to improve the traditional Slotted ALOHA (SA) system. These replicas are sent to provide collision diversity, rather than extending coverage like typical repetitions.
[0060] Contention Resolution Diversity Slotted Aloha (CRDSA) has been standardized in the digital video broadcasting (DVB) system for a long time. In this system, each terminal sends multiple copies of a packet, with each packet containing information in the payload header about the location of the replicas within the allocated TDMA / FDMA frame. This allows the receiver to perform sequential interference cancellation (SIC) . CRDSA relies on SIC to sequentially decode each copy from different users at the receiving end, eliminating interference and improving system performance.
[0061] It is agreed that details of CB-msg3 are to be studied. For example, how to enable multiplexing of multiple UE via orthogonal cover code (OCC) for NPUSCH format 1 is under discussion.
[0062] Embodiments of the present disclosure provide a solution of communication. In the solution, a terminal device may determine a CB-msg3 EDT RNTI and accordingly may detect a response based on the determined RNTI. As such, the terminal device may obtain the response from the network device without any ambiguity. Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0063] FIG. 1A illustrates an example communication network 100 in which some embodiments of the present disclosure can be implemented. The communication network 100 may also be called as a network environment, a network system, a communication system, a communication environment, or the like, the present disclosure does not limit this aspect. The communication network 100 includes a network device 110 and a terminal device 120 which may communicate with each other. The communication network 100 may also include a core network (CN) which is not illustrated in FIG. 1A, and the CN may involve a variety of network functions or entities.
[0064] In the communication network 100, the network device 110 and the terminal device 120 can communicate data and control information to each other, and the communications in the communication network may be implemented according to any proper communication protocol (s) .
[0065] Embodiments of the present disclosure can be applied to any suitable scenarios. For example, embodiments of the present disclosure can be implemented at reduced capability NR devices. Alternatively, embodiments of the present disclosure can be implemented in one of the followings: NR multiple-input and multiple-output (MIMO) , NR sidelink enhancements, NR systems with frequency above 52.6GHz, an extending NR operation up to 71GHz, narrow band-Internet of Thing (NB-IOT) / enhanced Machine Type Communication (eMTC) over non-terrestrial networks (NTN) , terrestrial networks (TN) , UE power saving enhancements, NR coverage enhancement, NB-IoT and LTE-MTC, Integrated Access and Backhaul (IAB) , NR Multicast and Broadcast Services, or enhancements on Multi-Radio Dual-Connectivity.
[0066] It is to be understood that the numbers of devices and their connection relationships and types shown in FIG. 1A are only for the purpose of illustration without suggesting any limitation. For example, there may be multiple terminal devices connecting to the network device 110, for example the network 100 may include any suitable numbers of devices adapted for implementing embodiments of the present disclosure.
[0067] The network device 110 may be implemented as an on-board network device, such as a gNB deployed at a satellite. In some implementations, the network 100 may be implemented as an NTN, which refers to a network or segment of networks using RF resources on board a satellite or a UAS platform. A satellite (or UAS platform) may implement either a transparent or a regenerative (with on board processing) payload. The satellite (or UAS platform) generate beams typically over a given service area bounded by its field of view. The footprints of the beams are typically of elliptic shape. The field of view of a satellite (or UAS platform) depends on the on board antenna diagram and min elevation angle.
[0068] FIG. 1B illustrates an NTN typical scenario based on transparent payload. A transparent payload may refer to Radio Frequency filtering, Frequency conversion and amplification. Hence, the waveform signal repeated by the payload is un-changed.
[0069] FIG. 1C illustrates an NTN typical scenario based on regenerative payload. A regenerative payload may refer to Radio Frequency filtering, Frequency conversion and amplification as well as demodulation / decoding, switch and / or routing, coding / modulation. This is effectively equivalent to having all or part of base station functions (e.g. gNB, eNB) on board the satellite (or UAS platform) .
[0070] Table 3 below describes some parameters for some kinds of satellite.
[0071] Table 3
[0072] In the present disclosure, the term “OCC” is used for referring to a coding technique used in wireless communication systems to mitigate interference and improve overall system performance. OCC is particularly effective in scenarios where multiple users or devices are transmitting simultaneously (Code Domain Multiplexing (CDM) technique) , such as in cellular networks or wireless local area networks (WLANs) .
[0073] In coding theory, orthogonal codes refer to sets of sequences that have desirable properties. These codes have the property that their inner product is zero, except when two identical sequences are multiplied together, in which case the inner product is equal to the length of the sequence or a fixed number larger than zero.
[0074] For example, CDM may be applied in time domain (TD) , in frequency domain (FD) , or in TD and FD together, for example, FIG. 1D illustrates a comparison 104 of some CDMs with a no-CDM scheme. For example, some basic operations may include spreading and multiplexing.
[0075] Each preamble-less EDT occasion has R EDT resources (in frequency) for UEs to choose from, to transmit. A UE chooses one out of these R EDT resources at random to transmit in, on each occasion. For NB-IoT case, up to 48 subcarriers with a subcarrier spacing of 3.75 kHz can be used for preamble-less EDT transmission (total carrier BW is 180kHz) . We assume single subcarrier mode of uplink transmission, however, it is noted that multi-tone scheme is also applied. For example, for 48 subcarriers with a SCS of 15 kHz, if multi-tone is configured, it is not needed to indicate all of the 48 subcarriers, but only part of them. For instance, for 3-tone scheme, 16 starting subcarriers may need to be indicated, thus only 4 bits are required.
[0076] For DSA / CRDSA, N such preamble-less EDT occasions in time are grouped together to form 1 “preamble-less EDT occasion group” . This is depicted with an example in FIG. 1E. A UE needs to choose k (≤N) out of the N occasions in the group to transmit in. In each of the chosen occasions, the UE chooses 1 among the R resources to transmit in. The choice of frequency resource for each occasion is independent of the choice for other occasions. The UE then transmits identical data in all the chosen (resource, occasion) pairs.
[0077] For DSA (depicted in FIG. 1F) , transmissions in a non-colliding frequency resource and EDT occasion are successful. A UE with at least 1 successful Tx is successful. In FIG. 1F, successful decoded UEs (using a scheme of N=3, k=2 for the example depicted in FIG. 1E) are: B, C, D, E, H, I, K, L.
[0078] For CRDSA (depicted in FIG. 1G) , interference from successful UE from previous steps are cancelled. Newly successful UEs in the same running example-UEs F and J, after a single step of interference cancelation in FIG. 1G. To visualize the benefit from interference cancellation, e.g., for UE F, note that in EDT Occasion 2, and Frequency Resource R0, a successful prior decoding of UE C (e.g., from EDT Occasion 3, R4) would allow for UE C’s interference to be cancelled, and thus a successful decoding of UE F would ensue (which would not have been possible with DSA alone) .
[0079] The duration of one EDT depends on the required number of RUs and the corresponding number of slots per RU. To fulfill the coverage requirements in IoT-NTN, whether in LEO or GEO scenarios, repeating NPUSCH transmission is necessary. For CB-msg3 EDT repetition, this can be achieved as illustrated in FIG. 1H and FIG. 1I. According to the channel, the duration of one EDT significantly exceeds the coherent time of the NTN channel. As a result, coherent combination for inter-occasion group repetition is not feasible, meaning that the full benefits of repetition gain cannot be realized.
[0080] In the present disclosure, multiple RUs may be configured or required for a transmission of the CB-msg3 EDT. It should be noted that the term “RU” is used for illustration without any limitation, in some examples, the multiple RUs may be interchangeably used with one of: a RU size, a transport block size (TBS) , a TBS range, a payload size, a payload size range, or the like. For example, a number of RUs may be determined based on TBS or payload size. However, it should be noted that the number of RUs determined from the TBS / payload size may vary depending on different channel conditions. The resources (or a resource pool) for the CB-msg3 EDT may be predefined or may be configured by the network device 110.
[0081] Reference is now made to FIG. 2, which illustrates a signalling chart illustrating communication process 200 in accordance with some example embodiments of the present disclosure. The process 200 may involve a network device 110 and a terminal device 120 as shown in FIG. 1A. It would be appreciated that the process 200 may be applied to other communication scenarios, which will not be described in detail.
[0082] In process 200, the terminal device 120 transmits, and the network device 110 receives, a CB-msg3 EDT at 210. In some implementations, the terminal device 120 may generate the CB-msg3 EDT, determine a resource (which may include at least one CB-msg3 occasion and a subcarrier) , and transmit the CB-msg3 EDT using the determined resource.
[0083] The terminal device 120 determines a RNTI based on a plurality of parameters at 220. It should be noted that the present disclosure does not limit a name of the RNTI, for ease of description, it may be a CB-msg3 EDT RNTI, which may be represented as CB-msg3-EDT-RNTI in the following description.
[0084] In some implementation, the plurality of parameters may include an identifier of a SFN where the CB-msg3 EDT is transmitted, which may be represented as SFN_id. In some implementation, the plurality of parameters may include an identifier of an opportunity which may be represented as opportunity_id, e.g., among multiple opportunities with an opportunity number of each CB-msg3 EDT occasion group. In some implementations, the plurality of parameters may include an identifier of a carrier where the CB-msg3 EDT is transmitted, which may be represented as carrier_id. For instance, the carrier_id of the anchor carrier is 0. In some implementations, the plurality of parameters may further include one or multiple parameters that discussed below. In some embodiments, the plurality of parameters may include a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT and a SCS for the CB-msg3 EDT, and optional a number of slots.
[0085] As an example, table 2 below shows a relationship of a number of RUs with some other parameters, where refers to a number of RUs, refers to a number of slots, and refers to a number symbols. The NPUSCH format 1 is used for varying uplink shared channel (UL-SCH) , and the NPUSCH format 2 is used for carrying UL control information. As indicated in Table 4, for NPUSCH format 1, the number of RUs and the number of slots can be directly determined based on a configured SCS being 3.75 kHz; however, RU structure information may be further needed to determine a number of RUs and the number of slots based on a configured SCS being 15 kHz.
[0086] Table 4
[0087] In some examples, a number of RUs configured for the CB-msg3 EDT may be a required number of RUs. For example, the number of RUs may be in a set of {3, 4, 5, 6, 8, 10}, however, it should be noted that the number of RUs may be another value, and the present disclosure does not limit for this aspect. For example, one RU may include 16 slots for SCS=3.75 kHz. In some examples, the SCS may be preconfigured, for example, the SCS may be 15 kHz, 3.75 kHz, or another value, the present disclosure does not limit for this aspect.
[0088] In some examples, the number of RUs may be that required for a transmission of NPUSCH including the CB-msg3 EDT. In some examples, the number of RUs may be that required for multiple repetitions of the CB-msg3 EDT, if the repetition is enabled. In some examples, the number of RUs may be that required for multiple trials (based on a configured number of opportunities) of the CB-msg3 EDT, e.g., each trial of the CB-msg3 EDT may include multiple repetitions of the CB-msg3 EDT.
[0089] Since the minimum number of required RUs for EDT is 3, the corresponding frame number is also 3 when using a 3.75 kHz SCS. Therefore, a CB-msg3 transmitted in frame 0 and frame 3 on the same carrier ID will have the same RNTI value. For solving this issue, a solution for determining a RNTI is provided as following.
[0090] In some examples, it may be determined that the CB-msg3 EDT resource is configured aligned to an edge of a system frame, e.g., based on the number of RUs, the SCS, and some other factors. For example, the SFN_id should be in a period of 3 frames.
[0091] In some examples, the plurality of parameters may further include a parameter that is determined based on the first parameter and a number of frames in each system frame. For example, the first parameter may be represented as Constant. For example the parameter may be represented as ConstantA1. For instance, ConstantA1=floor (1024 / Constant1) . As an example, the RNTI can be determined based on the following equation: CB-msg3-EDT-RNTI = 1 + floor (SFN_id / Constant1) + CostantA1*carrier_id (1)
[0092] For example, Constant1 may be 1 or 2 in some cases avoiding CB-msg3 transmitted in frame 0 and frame 3 on the same carrier ID having the same RNTI, e.g., when the CB-msg3 EDT resource is aligned to the edge of the system frame. As an example, if Constant1=2, a range of the RNTI and corresponding bit width cost can be reduced. For instance, ConstantA1 depends on Constant1, e.g., if Constant1=2, then ConstantA1=512.
[0093] In some examples, the CB-msg3 EDT resource is aligned to the edge of the slot, in this case, Constant1=1, ConstantA1=1024, and then equation (1) may be changed to the following equation (2) :
[0094] CB-msg3-EDT-RNTI = 1 + SFN_id + 1024*carrier_id (2)
[0095] As such, the RNTI can be determined without any ambiguity within a range that the SFN from 0 to 1023. Therefore, a collision possibility of multiple UEs can be reduced.
[0096] In some embodiments, if a repetition is enabled for the CB-msg3 EDT, the RNTI may be determined further based on a repetition number. For example, the plurality of parameters may further include a second parameter which is determined based on the repetition number and the number of RUs.
[0097] In some examples, the CB-msg3 EDT resource is aligned to the edge of the system frame, in this case, the second parameter may be represented as Constant2, and may be determined by: Contant2 < ceil (repetition number *number of RUs for each CB-msg3 EDT*16 / 20) under 3.75kHz SCS. It should be noted that the value “16” in the formula for determining Constant2 may be replaced by another value depending on the SCS configuration and tone configuration. In this case, a parameter that is determined based on the second parameter and a number of frames in each system frame may be represented as ConstantA2, and determined by ConstantA2 = floor (1024 / Constant2) . In some examples, a first function of SFN_id and the second parameter may be used for determining the RNTI, where the first function may be a “floor” function. In some examples, the RNTI can be determined based on the following equation: CB-msg3-EDT-RNTI= 1 + floor (SFN_id / Constant2) + ConstantA2*carrier_id (3)
[0098] For instance, if a number of RUs for CB-msg3 EDT is 3, and the repetition number is 8, then Constant2=1 and ConstantA2=1024. For instance, if a number of RUs for CB-msg3 EDT is 8, and the repetition number is 2, then Constant2=13 and ConstantA2=78.
[0099] In some examples, the CB-msg3 EDT resource is aligned to the edge of the slot, in this case, the second parameter may be represented as Constant3, and may be determined by: Contant3 < floor (repetition number *number of RUs for each CB-msg3 EDT*16 / 20) . It should be noted that the value “16” in the formula for determining Constant3 may be replaced by another value depending on the SCS configuration and tone configuration. In this case, a parameter that is determined based on the second parameter and a number of frames in each system frame may be represented as ConstantA3, and determined by ConstantA3 = floor (1024 / Constant3) . In some examples, a first function of SFN_id and the second parameter may be used for determining the RNTI, where the first function may be a “floor” function. In some examples, the RNTI can be determined based on the following equation: CB-msg3-EDT-RNTI= 1 + floor (SFN_id / Constant3) + ConstantA3*carrier_id (4)
[0100] For instance, if a number of RUs for CB-msg3 EDT is 8, and the repetition number is 2, then Constant3=12 and ConstantA3=85.
[0101] In some embodiments, if a repetition is enabled for the CB-msg3 EDT and multiple trials of the CB-msg3 EDT are enabled, the RNTI may be determined further based on a repetition number, a number of opportunities, and a hyper frame number.
[0102] Since the maximum number of required RUs for EDT is 10, the corresponding frame number is 8 under a 3.75 kHz SCS. When a repetition number of 128 is configured, the first CB-msg3 EDT transmitted in SFN ID 0 of hyper SFN ID 0 will have a second CB-msg3 EDT transmitted in SFN ID 0 of hyper SFN ID 1. The first and second transmissions will have the same RNTI value when they are transmitted on the same carrier.
[0103] In some examples, a first function of SFN_id and the second parameter may be used for determining the RNTI, where the first function may be a “floor” function. In some examples, a second function of hyper frame number of a number of opportunities may be used for determining the RNTI, where the first function may be a “floor” function or a “ceil” function. In some examples, the RNTI can be determined based on the following equation: CB-msg3-EDT-RNTI= 1 + function1 (SFN_id, Constant3) + ConstantA4*carrier_id + ConstantB4*function2 (hyper frame number, Constant5) (5)
[0104] Constant3 is the same as that discussed in equation (4) , and may be determined by: Contant3 < floor (repetition number *number of RUs for each CB-msg3 EDT*16 / 20) . Constant5= a number of opportunities, for example, if there are 4 opportunities for DSA CB-msg3 EDT, then Contant5 = 4. ConstantB4 = floor (1024 / Costant3) . ConstantA4 =floor (ConstantB4* (1024 / Constant4) ) . For example, function1 may be a floor function. For example, function2 may be a floor or ceil function. For instance, function2=floor (Hyper SFN_id / Constant4) or function2=ceil (Hyper SFN_id / Constant4) . Constant4 may depend on Constant5, e.g., Constant4=Constant5, or Constant4=floor (K*Constant5) , K is natural number.
[0105] In some embodiments, if OCC multiplexing is enabled for the CB-msg3 EDT, the RNTI may be determined further based on an orthogonal codeword set index. For example, the plurality of parameters may further include the orthogonal codeword set index. For instance, NPUSCH with OCC may support a symbol-level OCC (e.g., with an OCC length 2 in 3.75 kHz SCS) and a slot-level OCC (e.g., with an OCC length 2 in 15 kHz SCS) . In some examples, a third function of the orthogonal codeword set index may be used for determining the RNTI. In some examples, the RNTI may be determined based on the following equation: CB-msg3-EDT-RNTI= 1 + function1 (SFN_id, Constant3) + ConstantA4*carrier_id + ConstantB4*function2 (hyper frame number, Constant5) + ConstantC6*function3 (orthogonal codeword set index) (6)
[0106] Constant3, ConstantA4, ConstantB4, and Constant5 may be refer to that in equation (5) . ConstantC6 may be determined based on a maximum number of non-anchor carriers for a transmission of the CB-msg3 EDT, for example, the maximum number of non-anchor carriers for a transmission of the CB-msg3 EDT may be represented as maxNonAnchorCarriers, since there is an anchor carrier for the CB-msg3 EDT, accordingly a total number of carriers for the CB-msg3 EDT should be maxNonAnchorCarriers+1. For example, ConstantC6 may be determined by ConstantC6 = ConstantA4*(maxNonAnchorCarriers+1) . For example, function3 may be a predefined function, e.g., function3 (orthogonal codeword set index) = occ-index*256* (maxNonAnchorCarriers+1) , where occ-index refers to the orthogonal codeword set index.
[0107] In some embodiments, the “SFN_id” in each of equations (1) - (6) may be replaced by a combination of part of SFN_id and part of Opportunity_id, or by a combination of part of SFN_id ant the Opportunity_id.
[0108] In some embodiments, the plurality of parameters may include Opportunity_id, carrier_id, and optional further includes SFN_id. The resource of one CB-msg3 EDT group will span multiple frames; the opportunity ID can be utilized to derive the RNTI, addressing RNTI ambiguity issues, particularly for DSA. In some examples, the RNTI may be determined based on one of the following equations: CB-msg3-EDT-RNTI= 1 + Opportunity_id + CostantA8*carrier_id (7) CB-msg3-EDT-RNTI= 1 + Opportunity_id + floor (SFN_id / Constant9) + CostantA9*carrier_id (8)
[0109] ConstantA8 may refer to an opportunity number of each CB-msg3 EDT occasion group. Constant9 may larger than the Constant3 mentioned above. ConstantA9 may be determined based on the opportunity number of each CB-msg3 EDT occasion group and Constant9.
[0110] In some embodiments, some of the parameters (such as SFN_id, hyper SFN_id, carrier_id, occ_idx) may be determined based on one repetition of the CB-msg3 EDT. In some examples, some of the parameters may be determined based on the first repetition of the CB-msg3 EDT. For example, the first repetition in the first replica of CB-msg3 EDT may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. For example, the first repetition in the first replica of CB-msg3 EDT in the first symbol / slot may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. In some examples, some of the parameters may be determined based on the last repetition of the CB-msg3 EDT. For example, the last repetition in the last replica of CB-msg3 EDT may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. For example, the last repetition in the last replica of CB-msg3 EDT in the last symbol / slot may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx.
[0111] In some examples, the first repetition in the last replica of CB-msg3 EDT may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. In some examples, the first repetition in the last replica of CB-msg3 EDT in the first symbol / slot may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. In some examples, the first repetition in the last replica of CB-msg3 EDT in the last symbol / slot may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx.
[0112] In some examples, the last repetition in the first replica of CB-msg3 EDT may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. In some examples, the first symbol / slot in the first replica of CB-msg3 EDT in the last repetition may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. In some examples, the last symbol / slot in the first replica of CB-msg3 EDT in the last repetition may be used to determine SFN_id, hyper SFN_id, carrier_id, and occ_idx. It should be noted that some examples are listed for determining SFN_id, hyper SFN_id, carrier_id, and occ_idx, however, the present disclosure does not limit for this aspect, for example, any repetition, any symbol, any slot, any replica may be used for determining SFN_id, hyper SFN_id, carrier_id, and occ_idx.
[0113] For instance, a transmission of the CB-msg3 EDT may occupy multiple SFNs, multiple hyper frames, multiple carriers, and / or multiple OCCs, according to the determination manner, these parameters can be determined without any ambiguity.
[0114] In some embodiments, some of the parameters (such as SFN_id, hyper SFN_id, carrier_id, occ_idx) may be determined per OCC group, per repetition group, or per replica group. For example, these parameters may be determined separately for different OCC groups, different repetition groups, or different replica groups. For example, different OCC groups have different OCC indexes, different repetition groups have different carrier indexes, and different replica groups have different subcarrier indexes.
[0115] In some examples, a length of an OCC group is predefined or is configured by the network device 110. In some examples, a length of a repetition group is predefined or is configured by the network device 110. In some examples, a number of replicas in a replica group is predefined or is configured by the network device 110. In some examples, a length of the replica group is predefined or is configured by the network device 110.
[0116] As such, the CB-msg3 EDT RNTI can be determined based on a plurality of parameters. It should be noted that some embodiments above for the plurality of parameters are discussed only for illustration without any limitation, the plurality of parameters may further include one or more other parameters. In some examples, information about a subcarrier ID may be included, for example, a part of the subcarrier ID, such as a least significant bit (LSB) , may be used as a parameter for determining the RNTI. If the subcarrier ID is used to determine the RNTI, 6 bits are needed to identify the 48 subcarriers. However, since the total number of bits in an RNTI is 16, there may not be enough bits available in the RNTI to identify the subcarrier ID. In some examples, for multi-tone scheme, a subcarrier ID may be used as a parameter for determining the RNTI, since only a small number of bits is needed to identify the subcarriers.
[0117] Accordingly, the present disclosure provides a solution for determining a RNTI, which may be associated with part or all or a combination of the following: SFN_id, hyper SFN_id, carrier_id, subcarrier_id, occ_idx, opportunity_id, a number of RUs, SCS, a number of slots for a RU (RU configuration) , a repetition number, etc., other examples will not be listed for brevity.
[0118] On the other side of communication, the network device 110 determines the RNTI at 225 based on the received CB-msg3 EDT. It is appreciated that the determination of the RNTI at 225 is similar with that at 220, thus the details will not be repeated for brevity.
[0119] The network device 110 transmits a response to the CB-msg3 EDT at 230. In some examples, the response includes downlink control information (DCI) with a cyclic redundancy check (CRC) being scrambled by the RNTI. The terminal device 120 detects the response by using the RNTI at 235.
[0120] According to embodiments with reference to FIG. 2, the terminal device can determine a CB-msg3 EDT RNTI and accordingly may detect a response based on the determined RNTI. As such, the terminal device may obtain the response from the network device without any ambiguity. Therefore, a capacity of the network could be enhanced, and a latency of uplink transmission from idle mode without dynamic grant could be further reduced.
[0121] Reference is further made to FIG. 3, which illustrates a signalling chart illustrating communication process 300 in accordance with some example embodiments of the present disclosure. The process 300 may involve a network device 110 and a terminal device 120 as shown in FIG. 1A. It would be appreciated that the process 300 may be applied to other communication scenarios, which will not be described in detail.
[0122] In the process 300, the network device 110 transmits, and the terminal device 120 receives, a configuration which may indicate or include a list of resources at 310. In some implementations, the list of resources maps different combinations to different resources.
[0123] In some embodiments, the combination may be that of a payload size and a coverage level. In some examples, the list of resources maps different combinations of coverage level and payload size range to different resources. For example, for a specific combination of coverage level and payload size range, a corresponding resource can be determined based on the configuration.
[0124] In some embodiments, the combination may be that of a required number of frequency domain resources and a required number of time domain resources to complete single shot CB-Msg3 EDT, and the coverage level. In some examples, the required number of frequency domain resources and the required number of time domain resources to complete single shot CB-Msg3 EDT may be determined by one or more of the following: a number of slots configured for one RU (and / or a number of subcarriers configured for one RU) , and a number of required RUs. For example, the number of required RUs may be determined by the payload size.
[0125] In some examples, different combinations of coverage level and payload size range may map to different resources, for example, different resources may indicate one or more of the following: different carriers, different starting subcarriers, or different periodicities.
[0126] In case different periodicities are configured, TDM among multiple UEs can be enabled, and in addition different services with different latencies can be provided for the CB-msg3 EDT. As such, the present solution can be applied in various scenarios.
[0127] In some embodiments, the configuration may be transmitted from the network device 110 to a plurality of terminal devices, such as a UE group. For example, the configuration may be shared by the plurality of terminal devices.
[0128] In some embodiments, the configuration may be transmitted from the network device 110 to only the terminal device 120. For example, the configuration may be dedicated to the terminal device 120. In some examples, the configuration to the terminal device 120 may have a specific priority. For example, different configurations to different terminal devices may have different priorities. In the present disclosure, a priority for a terminal device 120 may be regarded as a subscribe plan or a customized strategy or the like, and the present disclosure does not limit for this aspect.
[0129] In addition or alternatively, the network device 110 may transmit a CB-msg3 EDT configuration which may be with or without a reference signal. In some examples, the CB-msg3 EDT configuration may indicate one or more of the following for the CB-msg3 EDT: an indication for enabling (or disabling in some other cases) the CB-msg3 EDT, SCS, number of RUs (or referred to as a TBS size or the like) , a repetition number, a number of opportunities, MCS, OCC configuration, attempt number of DSA, attempt number of CRDSA, etc.
[0130] In the process 300, the terminal device 120 determines a resource for CB-msg3 EDT based on the configuration at 320. In some implementations, the terminal device 120 may determine to transmit the CB-msg3 EDT. In some implementations, the terminal device 120 may determine a coverage level of the CB-msg3 EDT and a payload size range of the CB-msg3 EDT.
[0131] In some embodiments, the coverage level may be a coverage enhancement (CE) level which may be determined based on a repetition number. In some examples, a repetition number for the CB-msg3 EDT has been configured, and thus the CE level for the CB-msg3 EDT can be determined accordingly. For example, the terminal device 120 may determine the repetition number based on a table which maps different downlink (DL) signal qualities to different CE levels. For instance, the terminal device 120 may determine its downlink signal quality, such as a reference signal received power (RSRP) , and then determine the repetition number accordingly.
[0132] In some embodiments, the payload size range of the CB-msg3 EDT may also be referred to as a number of RUs, TBS range, etc., as mentioned above. In some examples, the terminal device 120 may determine a modulation and coding scheme (MCS) based on a measured RSRP and an MCS table that maps different DL signal qualities to different MCSs, and in addition, the terminal device 120 may determine the payload size range based on the determined MCS, configured number of RUs and the repetition number. For example, the MCS table may map a specific DL signal quality to a specific MCS.
[0133] In some examples, the terminal device 120 may determine an MCS and a repetition number based on a measured RSRP and an MCS table that maps different DL signal qualities to different combination of MCS and repetition number, and in addition, the terminal device 120 may determine the payload size range based on the determined MCS and repetition number, and configured number of RUs. For example, the MCS table may map a specific DL signal quality to a combination of a specific MCS and a specific repetition number.
[0134] In some examples, the terminal device 120 may determine the payload size range based on a measured RSRP and an MCS table that maps different DL signal qualities to different combination of MCS, repetition number, and payload size range. For example, the MCS table may map a specific DL signal quality to a combination of a specific MCS, a specific repetition number, and a specific payload size range.
[0135] In some embodiments, the terminal device 120 may determine the resource from the list of resources based on the determined CE level and payload size range. In some examples, the determined resource may include a specific carrier with a specific carrier index. In some examples, the determined resource may include a specific starting subcarrier with a specific subcarrier index. In some examples, the determined resource may include a specific periodicity. As an example, the terminal device 120 may determine that the CB-msg3 EDT is to be transmitted in the specific carrier from the specific starting subcarrier with the specific periodicity.
[0136] In some implementations, the terminal device 120 may determine the resource at 320 further based on other information. In some embodiments, the network device 110 may transmit, and the terminal device 120 may receive, first information which indicates a number of opportunities for the CB-msg3 EDT. In some embodiments, the network device 110 may transmit, and the terminal device 120 may receive, second information which indicates a number of replicas for the CB-msg3 EDT. In some embodiments, the network device 110 may transmit, and the terminal device 120 may receive, third information which indicates to enable or disable a DSA CB-msg3 EDT. For example, a DSA configuration including the third information may be transmitted from the network device 110 to the terminal device 120.
[0137] In some examples, some or all of the first to the third information may be included in the configuration which is transmitted at 310. In some other examples, some or all of the first to the third information may be included in a separate message different from the configuration which is transmitted at 310. In some examples, some or all of the first to the third information may be included in a same message or may be included in different messages.
[0138] In some examples, the first information may be transmitted from the network device 110 to a plurality of terminal devices, that is the first information may be shared by the plurality of terminal devices. In some other example, the first information may be transmitted from the network device 110 to only the terminal device 120, that is, the first information may be dedicated to the terminal device 120. In some examples, the first information to the terminal device 120 may have a specific priority. For example, different first information to different terminal devices may have different priorities. In the present disclosure, a priority for a terminal device 120 may be regarded as a subscribe plan or a customized strategy or the like, and the present disclosure does not limit for this aspect.
[0139] In some embodiments, the terminal device 120 may determine multiple replicas of the DSA CB-msg3 EDT from the number of opportunities. In some embodiments, the terminal device 120 may determine resources for multiple replicas of the DSA CB-msg3 EDT. In some examples, the DSA CB-msg3 EDT is enabled, and the terminal device 120 may determine a resource used for the first replica of the DSA CB-msg3 EDT, and then determine resources for other replica (s) of the DSA CB-msg3 EDT.
[0140] In the process 300, the terminal device 120 transmits the CB-msg3 EDT on the determined resource at 330. In some examples, the CB-msg3 EDT may be DSA CB-msg3 EDT if it is enabled. In some examples, the CB-msg3 EDT may include multiple repetitions of CB-msg3 EDT if a repetition number or a CE level is configured.
[0141] On the other side of communication, the network device 110 may try to detect a CB-msg3 EDT from the terminal device 120, e.g., on preconfigured resources. In some examples, the network device 110 may successfully receive the CB-msg3 EDT that transmitted at 330.
[0142] In some embodiments, the network device 110 may provide a response to the received CB-msg3 EDT after successfully detecting the CB-msg3 EDT. In some examples, the response may be similar with that discussed at 230. In some examples, if a collision occurs on the resource, the response may indicate that a collision (or jam) in the resource.
[0143] According to embodiments with reference to FIG. 3, a resource for the CB-msg3 EDT can be determined based on a CE level and a payload size range. As such, a success rate of the transmission can be improved, and a transmission delay of the successful CB-msg3 EDT can be reduced. In some examples, different priorities may be configured for different terminal devices, and thus a personalized transmission can be achieved.
[0144] The CE level, which determines the number of repetitions, along with the required number of RUs (related to the TBS) and the required number of slots for each RU (determined by the SCS and the number of tones) , determines the duration of one EDT occasion. CB-msg3 EDT cell specific PUSCH resources for Msg3 transmission are provided per CE level, the number of RUs required by the TBS, and the number of slots required by each RU (e.g. per a combination of CE level, the number of RUs required by the TBS, and the number of slots required by each RU) .
[0145] A terminal device determines the CE level by measuring the DL reference signals. It then identifies the required number of slots for each RU based on the UL configurations broadcasted by the network. Additionally, the terminal calculates the required number of RUs using the boolean value of edt-SmallTBS-Enabled along with the TBS to be transmitted. Subsequently, the terminal can select the appropriate CB-message EDT resources from the resource list configured by the network to transmit the CB-msg3 EDT.
[0146] PUSCH resources for Msg3 transmission are provided per CE level, the required number of RUs and the number of slots configured for each RU.
[0147] For DSA, a terminal must be aware of the corresponding resource of the EDT occasion group with M opportunities.
[0148] Cell-specific PUSCH resource groups for Msg3 transmission are provided per CE level, the required number of RUs, the required number of slots for each RU, and the opportunity number. CB-msg3 EDT cell specific PUSCH resource groups for Msg3 transmission are provided per CE level, the number of RUs required by the TBS, the number of slots required by each RU, and the opportunity number (e.g. per a combination of CE level, the number of RUs required by the TBS, the number of slots required by each RU, and the opportunity number) .
[0149] Each CB-msg3 EDT resource should be close to adjacent resources in the time domain for DSA resource group configuration.
[0150] It is to be appreciated that the processes described above are only for illustration without any limitation. In some examples, one or more steps may be omitted or combined or modified. In some examples, one or more additional steps may be added. One or more steps in a process may be combined into another process. It is to be understood that some further embodiments may be obtained and are still in the protection scope of the present disclosure. For example, the process 200 and the process 300 can be combined, one or multiple steps in the process 200 may be combined in to the process 300, or vice versa. For instance, the terminal device 120 may determine the resource as discussed at 320 and then transmit the CB-msg3 EDT; in addition, the terminal device 120 may determine a CB-msg3 EDT RNTI as discussed at 220 and detect a response using the RNTI.
[0151] FIG. 4 illustrates a flowchart of an example method 400 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the terminal device which may perform the method 400 can be the terminal device 120 discussed above.
[0152] At block 410, the terminal device 120 transmits, to a network device, a CB-msg3 EDT for a random access. At block 420, the terminal device 120 determines a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is transmitted and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is transmitted, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT. At block 430, the terminal device 120 detects a response to the CB-msg3 EDT from the network device based on the RNTI.
[0153] It should be noted that the method 400 may include various other operations which may be performed by the terminal device 120 as described above with reference to FIG. 2.
[0154] FIG. 5 illustrates a flowchart of an example method 500 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the terminal device which may perform the method 500 can be the terminal device 120 mentioned above.
[0155] At block 510, the terminal device 120 receives, from a network device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources. At block 520, the terminal device 120 determines a resource, from the list of resources, based on a coverage level and a payload size of a CB-msg3 EDT. At block 530, the terminal device 120 transmits, to the network device, the CB-msg3 EDT for a random access based on the resource.
[0156] It should be noted that the method 800 may include various other operations which may be performed by the terminal device 120 as described above with reference to FIG. 3.
[0157] FIG. 6 illustrates a flowchart of an example method 600 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the network device which may perform the method 600 can be the network device 110 discussed above.
[0158] At block 610, the network device 110 receives, from a terminal device, a CB-msg3 EDT for a random access. At block 620, the network device 110 determines a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is received and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is received, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT. At block 630, the network device 110 transmits, to the terminal device, a response to the CB-msg3 EDT, wherein the response comprises a DCI with a CRC being scrambled by the RNTI.
[0159] It should be noted that the method 600 may include various other operations which may be performed by the network device 110 as described above with reference to FIG. 2.
[0160] FIG. 7 illustrates a flowchart of an example method 700 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the network device which may perform the method 700 can be the network device 110 discussed above.
[0161] At block 710, the network device 110 transmits, to a terminal device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources. At block 720, the network device 110 receives, from the terminal device, a CB-msg3 EDT for a random access on a resource selected from the list of resources, wherein the resource is determined based on a coverage level and a payload size of the CB-msg3 EDT.
[0162] It should be noted that the method 700 may include various other operations which may be performed by the network device 110 as described above with reference to FIG. 3.
[0163] Details of some embodiments according to the present disclosure have been described with reference to FIGS. 1A-7. Now an example implementation of the terminal device and the network device will be discussed below.
[0164] In some example embodiments, a terminal device comprises circuitry configured to: transmit, to a network device, a CB-msg3 EDT for a random access; determine a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is transmitted and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is transmitted, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and detect a response to the CB-msg3 EDT from the network device based on the RNTI. It should be noted that the terminal device comprises circuitry configured to perform various other operations as described above with reference to FIG. 2.
[0165] In some example embodiments, a terminal device comprises circuitry configured to: receive, from a network device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; determine a resource, from the list of resources, based on a coverage level and a payload size of a CB-msg3 EDT; and transmit, to the network device, the CB-msg3 EDT for a random access based on the resource. It should be noted that the terminal device comprises circuitry configured to perform various other operations as described above with reference to FIG. 3.
[0166] In some example embodiments, a network device comprises circuitry configured to: receive, from a terminal device, a CB-msg3 EDT for a random access; determine a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is received and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is received, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and transmit, to the terminal device, a response to the CB-msg3 EDT, wherein the response comprises a DCI with a CRC being scrambled by the RNTI. It should be noted that the network device comprises circuitry configured to perform various other operations as described above with reference to FIG. 2.
[0167] In some example embodiments, a network device comprises circuitry configured to: transmit, to a terminal device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; and receive, from the terminal device, a CB-msg3 EDT for a random access on a resource selected from the list of resources, wherein the resource is determined based on a coverage level and a payload size of the CB-msg3 EDT. It should be noted that the network device comprises circuitry configured to perform various other operations as described above with reference to FIG. 3.
[0168] FIG. 8 illustrates a simplified block diagram of a device 800 that is suitable for implementing embodiments of the present disclosure. The device 800 can be considered as a further example implementation of the terminal device 120 and the network device 110 as described above. Accordingly, the device 800 can be implemented at or as at least a part of the terminal device or the network device.
[0169] As shown, the device 800 includes a processor 810, a memory 820 coupled to the processor 810, a suitable transceiver 840 coupled to the processor 810, and a communication interface coupled to the transceiver 840. The memory 820 stores at least a part of a program 830. The transceiver 840 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 840 may include at least one of a transmitter and a receiver. The transmitter and the receiver may be functional modules or physical entities. The transceiver 840 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.
[0170] The program 830 is assumed to include program instructions that, when executed by the associated processor 810, enable the device 800 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1A-7. The embodiments herein may be implemented by computer software executable by the processor 810 of the device 800, or by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 810 and memory 820 may form processing means 850 adapted to implement various embodiments of the present disclosure.
[0171] The memory 820 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 820 is shown in the device 800, there may be several physically distinct memory modules in the device 800. The processor 810 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 800 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.
[0172] In summary, embodiments of the present disclosure may provide the following solutions.
[0173] The present disclosure provides a terminal device, comprising at least one processor configured to cause the terminal device at least to: transmit, to a network device, a CB-msg3 EDT for a random access; determine a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is transmitted and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is transmitted, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and detect a response to the CB-msg3 EDT from the network device based on the RNTI.
[0174] In one embodiment, the terminal device as above, the plurality of parameters further comprise a parameter that is determined based on the first parameter and a number of frames in each system frame.
[0175] In one embodiment, the terminal device as above, a repetition is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of: a second parameter which is determined based on a repetition number and the number of RUs for the CB-msg3 EDT, a third parameter which is determined based on a number of opportunities, or a hyper frame number.
[0176] In one embodiment, the terminal device as above, an OCC multiplexing is enabled for the CB-msg3 EDT, and the plurality of parameters further comprise at least one of: an orthogonal codeword set index, or a maximum number of non-anchor carriers for a transmission of the CB-msg3 EDT.
[0177] In one embodiment, the terminal device as above, at least part of the plurality of parameters are determined based on one of: a first repetition of the CB-msg3 EDT, a last repetition of the CB-msg3 EDT, a first repetition in a first replica of CB-msg3 EDT, a first repetition in a last replica of CB-msg3 EDT, a last repetition in a first replica of CB-msg3 EDT, or a last repetition in a last replica of CB-msg3 EDT.
[0178] In one embodiment, the terminal device as above, at least part of the plurality of parameters are determined per OCC group, per repetition group, or per replica group.
[0179] In one embodiment, the terminal device as above, different OCC groups have different OCC indexes, different repetition groups have different carrier indexes, and different replica groups have different subcarrier indexes.
[0180] In one embodiment, the terminal device as above, a length of an OCC group is predefined or is configured by the network device, a length of a repetition group is predefined or is configured by the network device, a number of replicas in a replica group is predefined or is configured by the network device, and a length of the replica group is predefined or is configured by the network device.
[0181] In one embodiment, the terminal device as above, the response comprises a DCI with a CRC being scrambled by the RNTI.
[0182] The present disclosure provides a terminal device, comprising at least one processor configured to cause the terminal device at least to: receive, from a network device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; determine a resource, from the list of resources, based on a coverage level and a payload size of a CB-msg3 EDT; and transmit, to the network device, the CB-msg3 EDT for a random access based on the resource.
[0183] In one embodiment, the terminal device as above, each resource in the list of resources comprises at least one of: a carrier index, a subcarrier index for starting a transmission, or a periodicity.
[0184] In one embodiment, the terminal device as above, the configuration is shared among a plurality of terminal devices, or is dedicated to the terminal device with a specified priority.
[0185] In one embodiment, the terminal device as above, the at least one processor is further configured to cause the terminal device to: receive, from the network device, first information indicating a number of opportunities for a DSA CB-msg3 EDT; receive, from the network device, second information indicating a number of replicas for the DSA CB-msg3 EDT; and receive, from the network device, third information indicating to enable or disable the DSA CB-msg3 EDT.
[0186] In one embodiment, the terminal device as above, the at least one processor is further configured to cause the terminal device to: in accordance with a determination that the DSA CB-msg3 EDT is enabled, determine that the resource from the list of resources is used for a first opportunity of the DSA CB-msg3 EDT; and determine at least one further resource for at least one opportunity based on the number of opportunities.
[0187] In one embodiment, the terminal device as above, the first information is shared among a plurality of terminal devices, or is dedicated to the terminal device with a specified priority.
[0188] The present disclosure provides a network device, comprising at least one processor configured to cause the network device at least to: receive, from a terminal device, a CB-msg3 EDT for a random access; determine a RNTI based on a plurality of parameters, wherein the plurality of parameters at least comprise: an identifier of a SFN where the CB-msg3 EDT is received and / or an identifier of an opportunity, an identifier of a carrier where the CB-msg3 EDT is received, and a first parameter which is determined based on a number of RUs configured for the CB-msg3 EDT, a SCS for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; and transmit, to the terminal device, a response to the CB-msg3 EDT, wherein the response comprises a DCI with a CRC being scrambled by the RNTI.
[0189] In one embodiment, the network device as above, the plurality of parameters further comprise a parameter that is determined based on the first parameter and a number of frames in each system frame.
[0190] In one embodiment, the network device as above, a repetition is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of: a second parameter which is determined based on a repetition number and the number of RUsCB-msg3 EDT, a third parameter which is determined based on a number of opportunities, or a hyper frame number.
[0191] In one embodiment, the network device as above, an OCC multiplexing is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of:an orthogonal codeword set index, or a maximum number of non-anchor carriers for a transmission of the CB-msg3 EDT.
[0192] In one embodiment, the network device as above, at least part of the plurality of parameters are determined based on one of: a first repetition of the CB-msg3 EDT, a last repetition of the CB-msg3 EDT, a first repetition in a first replica of CB-msg3 EDT, a first repetition in a last replica of CB-msg3 EDT, a last repetition in a first replica of CB-msg3 EDT, or a last repetition in a last replica of CB-msg3 EDT.
[0193] In one embodiment, the network device as above, at least part of the plurality of parameters are determined per OCC group, per repetition group, or per replica group.
[0194] In one embodiment, the network device as above, different OCC groups have different OCC indexes, different repetition groups have different carrier indexes, and different replica groups have different subcarrier indexes.
[0195] In one embodiment, the network device as above, a length of an OCC group is predefined or is configured by the network device, a length of a repetition group is predefined or is configured by the network device, a number of replicas in a replica group is predefined or is configured by the network device, and a length of the replica group is predefined or is configured by the network device.
[0196] The present disclosure provides a network device, comprising at least one processor configured to cause the network device at least to: transmit, to a terminal device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources; and receive, from the terminal device, a CB-msg3 EDT for a random access on a resource selected from the list of resources, wherein the resource is determined based on a coverage level and a payload size of the CB-msg3 EDT.
[0197] In one embodiment, the network device as above, each resource in the list of resources comprises at least one of: a carrier index, a subcarrier index for starting a transmission, or a periodicity.
[0198] In one embodiment, the network device as above, the configuration is transmitted plurality of terminal devices which comprise the terminal device, or is dedicated to the terminal device with a specified priority.
[0199] In one embodiment, the network device as above, the at least one processor is further configured to cause the network device to: transmit, to the terminal device, first information indicating a number of opportunities for a DSA CB-msg3 EDT; transmit, to the terminal network device, second information indicating a number of replicas for the DSA CB-msg3 EDT; and transmit, to the terminal network device, third information indicating to enable or disable the DSA CB-msg3 EDT.
[0200] In one embodiment, the network device as above, the first information is transmitted to a plurality of terminal devices which comprise the terminal device, or is dedicated to the terminal device with a specified priority.
[0201] The present disclosure provides a method of communication, comprising the operations implemented at the terminal device or at a network device discussed above.
[0202] The present disclosure provides a terminal device, comprising: a processor; and a memory storing computer program codes; the memory and the computer program codes configured to, with the processor, cause the terminal device to perform the method implemented at the terminal device discussed above.
[0203] The present disclosure provides a network device, comprising: a processor; and a memory storing computer program codes; the memory and the computer program codes configured to, with the processor, cause the network device to perform the method implemented at the network device discussed above.
[0204] The present disclosure provides a non-transitory computer readable medium having instructions stored thereon, the instructions, when executed by a processor of an apparatus, causing the apparatus to perform the method implemented at a terminal device or at a network device discussed above.
[0205] 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.
[0206] 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. 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.
[0207] 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.
[0208] 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.
[0209] 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.
[0210] 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 at least one processor configured to cause the terminal device to:transmit, to a network device, a contention based message 3 (CB-msg3) early data transmission (EDT) for a random access;determine a radio network temporary identifier (RNTI) based on a plurality of parameters, wherein the plurality of parameters at least comprise:an identifier of a system frame number (SFN) where the CB-msg3 EDT is transmitted and / or an identifier of an opportunity,an identifier of a carrier where the CB-msg3 EDT is transmitted, anda first parameter which is determined based on a number of resource units (RU) configured for the CB-msg3 EDT, a subcarrier spacing (SCS) for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; anddetect a response to the CB-msg3 EDT from the network device based on the RNTI.2.The terminal device of claim 1, wherein the plurality of parameters further comprise a parameter that is determined based on the first parameter and a number of frames in each system frame.3.The terminal device of claim 1, wherein a repetition is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of:a second parameter which is determined based on a repetition number and the number of RUs for the CB-msg3 EDT,a third parameter which is determined based on a number of opportunities, ora hyper frame number.4.The terminal device of claim 1, wherein an orthogonal cover code (OCC) multiplexing is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of:an orthogonal codeword set index, ora maximum number of non-anchor carriers for a transmission of the CB-msg3 EDT.5.The terminal device of claim 1, wherein at least part of the plurality of parameters are determined based on one of:a first repetition of the CB-msg3 EDT,a last repetition of the CB-msg3 EDT,a first repetition in a first replica of CB-msg3 EDT,a first repetition in a last replica of CB-msg3 EDT,a last repetition in a first replica of CB-msg3 EDT, ora last repetition in a last replica of CB-msg3 EDT.6.The terminal device of claim 1, wherein at least part of the plurality of parameters are determined per OCC group, per repetition group, or per replica group.7.The terminal device of claim 6, wherein different OCC groups have different OCC indexes, different repetition groups have different carrier indexes, and different replica groups have different subcarrier indexes.8.The terminal device of claim 6, wherein a length of an OCC group is predefined or is configured by the network device, a length of a repetition group is predefined or is configured by the network device, a number of replicas in a replica group is predefined or is configured by the network device, and a length of the replica group is predefined or is configured by the network device.9.The terminal device of claim 1, wherein the response comprises downlink control information (DCI) with a cyclic redundancy check (CRC) being scrambled by the RNTI.10.A terminal device comprising at least one processor configured to cause the terminal device to:receive, from a network device, a configuration indicating a list of resources which maps different combinations of coverage level and payload size range to different resources;determine a resource, from the list of resources, based on a coverage level and a payload size of a contention based message 3 (CB-msg3) early data transmission (EDT) ; andtransmit, to the network device, the CB-msg3 EDT for a random access based on the resource.11.The terminal device of claim 10, wherein each resource in the list of resources comprises at least one of:a carrier index,a subcarrier index for starting a transmission, ora periodicity.12.The terminal device of claim 10, wherein the configuration is shared among a plurality of terminal devices, or is dedicated to the terminal device with a specified priority.13.The terminal device of claim 10, wherein the at least one processor is further configured to cause the terminal device to:receive, from the network device, first information indicating a number of opportunities for a diversity slot aloha (DSA) CB-msg3 EDT;receive, from the network device, second information indicating a number of replicas for the DSA CB-msg3 EDT; andreceive, from the network device, third information indicating to enable or disable the DSA CB-msg3 EDT.14.The terminal device of claim 13, wherein the at least one processor is further configured to cause the terminal device to:in accordance with a determination that the DSA CB-msg3 EDT is enabled, determine that the resource from the list of resources is used for a first opportunity of the DSA CB-msg3 EDT; anddetermine at least one further resource for at least one opportunity based on the number of opportunities.15.The terminal device of claim 13, wherein the first information is shared among a plurality of terminal devices, or is dedicated to the terminal device with a specified priority.16.A network device comprising at least one processor configured to cause the network device to:receive, from a terminal device, a contention based message 3 (CB-msg3) early data transmission (EDT) for a random access;determine a radio network temporary identifier (RNTI) based on a plurality of parameters, wherein the plurality of parameters at least comprise:an identifier of a system frame number (SFN) where the CB-msg3 EDT is received and / or an identifier of an opportunity,an identifier of a carrier where the CB-msg3 EDT is received, anda first parameter which is determined based on a number of resource units (RU) configured for the CB-msg3 EDT, a subcarrier spacing (SCS) for the CB-msg3 EDT, and a number of slots for a RU configured for the CB-msg3 EDT; andtransmit, to the terminal device, a response to the CB-msg3 EDT, wherein the response comprises downlink control information (DCI) with a cyclic redundancy check (CRC) being scrambled by the RNTI.17.The network device of claim 16, wherein the plurality of parameters further comprise a parameter that is determined based on the first parameter and a number of frames in each system frame.18.The network device of claim 16, wherein a repetition is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of:a second parameter which is determined based on a repetition number and the number of RUsCB-msg3 EDT,a third parameter which is determined based on a number of opportunities, ora hyper frame number.19.The network device of claim 16, wherein an orthogonal cover code (OCC) multiplexing is enabled for the CB-msg3 EDT, and wherein the plurality of parameters further comprise at least one of:an orthogonal codeword set index, ora maximum number of non-anchor carriers for a transmission of the CB-msg3 EDT.20.The network device of claim 16, wherein at least part of the plurality of parameters are determined based on one of:a first repetition of the CB-msg3 EDT,a last repetition of the CB-msg3 EDT,a first repetition in a first replica of CB-msg3 EDT,a first repetition in a last replica of CB-msg3 EDT,a last repetition in a first replica of CB-msg3 EDT, ora last repetition in a last replica of CB-msg3 EDT.