Method and apparatus for communication fallback

Abstract

Methods, apparatus, and systems for communication are disclosed. One method includes determining whether a node needs to fall back from a second frequency range communication to a first frequency range communication different from the second frequency range, and the method further includes, in response to the determination that no fallback is needed, transmitting data from the node using the second frequency range communication, or, in response to the determination that a fallback is needed, performing a fallback from the second frequency range communication to the first frequency range communication and transmitting a simplified version of the data from the node using the first frequency range communication.

Description

[Technical Field]

[0001] Cross-Reference to Related Patent Application This application claims the benefit of U.S. Provisional Application No. 63 / 518,277, filed on August 8, 2023, and entitled "METHODS AND APPARATUS FOR COMMUNICATION FALLBACK", which is incorporated herein by reference in its entirety.

[0002] The apparatus and methods according to the present disclosure relate generally to communications, and more specifically, to methods, systems, and devices for communication fallback. [Background Art]

[0003] For example, communication such as sidelink communication between two nodes may use a low frequency band (e.g., 5.9 GHz or lower), or a high frequency band (e.g., mmWave band). Using the high frequency band enables higher data rates and / or larger data sizes than the low frequency band. However, communication using the high frequency band also has problems such as increased path loss and reduced coverage due to high attenuation. Beam management including beamforming will mitigate these issues in high frequency communication. However, the introduction of beam management may introduce additional sources of error, such that beam failure may occur and communication continuity may be lost. Systems and methods that can ensure communication continuity are desired. [Summary of the Invention]

[0004] According to some embodiments of the present disclosure, a method for communication is provided. The method includes determining whether a node needs to fall back from a second frequency range communication to a first frequency range communication different from the second frequency range, and further includes, in response to the determination that a fallback is not needed, transmitting data from the node using the second frequency range communication, or, in response to the determination that a fallback is needed, performing a fallback from the second frequency range communication to the first frequency range communication and transmitting a simplified version of the data from the node using the first frequency range communication.

[0005] According to some embodiments of the present disclosure, a node for communication is provided. The node includes a memory for storing instructions and a processor configured to execute the instructions stored in the memory to determine whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, the processor is further configured to execute the instructions stored in the memory to perform at least one of the following: if it is determined that a fallback is not required, transmit data from the node using the second frequency range communication; or if it is determined that a fallback is required, perform a fallback from the second frequency range communication to the first frequency range communication and transmit a simplified version of the data from the node using the first frequency range communication.

[0006] According to some embodiments of the present disclosure, a non-temporary computer-readable medium is provided which is executable by one or more processors of a node for communication and which stores instructions for performing a method. The method includes determining for the node whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required, and the method determines that a fallback is not required. Depending on the situation, this further includes transmitting data from the node using a second frequency range communication, or, in response to a determination that a fallback is necessary, performing a fallback from the second frequency range communication to the first frequency range communication and transmitting a simplified version of the data from the node using the first frequency range communication. [Brief explanation of the drawing]

[0007] [Figure 1] This is a schematic diagram showing a sidelink communication system according to some embodiments of the present disclosure. [Figure 2] This is an example of a flowchart illustrating a method for communication according to some embodiments of the present disclosure. [Figure 3] This is a block diagram of a node for communication according to some embodiments of the present disclosure. [Modes for carrying out the invention]

[0008] The following references to exemplary embodiments illustrated in the accompanying drawings. The following description refers to the accompanying drawings, and the same numbers in different drawings represent identical or similar elements unless otherwise noted. The implementations described in the following description of exemplary embodiments do not represent all implementations relating to the present disclosure. Rather, they are merely examples of systems, apparatus, and methods relating to aspects relating to the present disclosure as described in the accompanying claims.

[0009] In this disclosure, the term “node” is used as a general term including, but not limited to, user equipment (UE), relay nodes, vehicle modules, and network infrastructure nodes such as base stations, roadside units, repeaters, transponders, wireless routers, controllers, access points, and their subsystems, including Evolved NodeB or gNB. In this disclosure, the terms “radio system” and “radio interface” are used as general terms including both terrestrial and satellite systems. While some examples in this disclosure relate to 3G Partnership Project (3GPP) 5G technology, other radio access technologies that are future generations of 3GPP radio technology, such as 3GPP 4G technology referred to as Long-Term Evolution (LTE), or 6G or 7G, may also utilize the inventions in this disclosure. While some examples in this disclosure relate to 3GPP technology, the inventions in this disclosure are applicable to non-3GPP technologies, such as IEEE and its 802.11 derivative standards, Wi-Fi, or WiMAX, but are not limited to these.

[0010] Figure 1 is a schematic diagram showing a sidelink communication system according to some embodiments of the present disclosure. Referring to Figure 1, the sidelink communication system 100 consists of UEs that communicate directly with each other. This includes UE 102 and UE 104. For example, UE 102 and UE 104 may be wireless devices. UE 102 may be a transmitter (Tx) UE configured or programmed to transmit signals or data to UE 104. UE 104 may be a receiver (Rx) UE configured or programmed to receive signals or data transmitted from UE 102. Sidelink communication technology allows UE UE 102 can communicate directly with UE 104 and one or more other UEs. For simplicity, Figure 1 illustrates UE 102 communicating with only one UE (UE 104). Direct communication between UE 102 and UE 104 may occur within cellular network coverage, outside cellular network coverage, or in partial cellular network coverage where only one of the two UEs (UE 102, 104) is within cellular network coverage. The wireless interface between UE 102 and UE 104 is denoted as the PC5 interface.

[0011] UE 102 and UE 104 may communicate with each other using a low-frequency band such as frequency range 1 (FR1). In this disclosure, FR1 is defined as the frequency range from 410 MHz to 7.125 GHz (including the sub-6 GHz spectrum). 102 and UE 104 may also communicate using higher frequency bands such as FR2. In this disclosure, FR2 is defined as two frequency subranges (including the millimeter-wave spectrum): FR2-1 from 24.25 GHz to 52.6 GHz and FR2-2 from 52.6 GHz to 71 GHz. Compared to FR1 communication, FR2 communication allows for higher data rates and / or larger data sizes, but FR2 communication also has its own problems. For example, FR2 communication generally has greater attenuation than FR1 communication, resulting in greater path loss and narrower coverage. This is particularly noticeable when there are objects (e.g., vehicles, especially large vehicles such as trucks and buses, and buildings) in the signal transmission path, making FR2 much more susceptible to interruption than FR1.

[0012] The aforementioned drawbacks of FR2 communication can be mitigated by beam management, including beamforming using narrow beams and / or the use of directional antennas. However, the introduction of beam management for sidelink FR2 may also introduce further sources of error in sidelink communication between two UEs compared to sidelink FR1, potentially resulting in beam failures. If the distance between UE 102 and UE 104 becomes critical, and / or if the aforementioned FR2-specific problems occur, UE 102 and UE 104 may no longer be able to communicate with each other, potentially leading to a loss of communication continuity.

[0013] At least some embodiments of the present disclosure address the aforementioned problems in FR2 communication by providing a method for switching from sidelink FR2 to sidelink FR1 in order to maintain communication continuity. For example, one or more embodiments of the present disclosure provide a method for transmitting a simplified version of the data using sidelink FR1 if sidelink FR2 transmission fails and / or if the sidelink FR2 connection quality is poor. In this way, communication continuity is ensured.

[0014] The methods and systems disclosed herein are illustrated using sidelink FR2 communication, but the scope of this disclosure is not limited thereto. The methods disclosed herein are applicable to any wireless communication, including communication between a device and a network, and / or satellite communication, as well as switching between any two frequency bands.

[0015] Figure 2 is a flowchart illustrating a method for communication according to some embodiments of the present disclosure. Referring to Figure 2, method 200 may be performed by a node in communication. The node may include at least one of the following: at least one UE, at least one relay node, at least one in-vehicle module, at least one base station, at least one roadside unit, at least one repeater, at least one transponder, at least one wireless router, at least one controller, or at least one access point. In some embodiments, the node may be a Tx UE for sidelink communication, such as UE 102 in Figure 1.

[0016] Method 200 includes step 202 of determining whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node. In some embodiments, the first frequency range communication and the second frequency range communication may each be a sidelink communication. In some embodiments, the first frequency range communication may include one or more frequency bands in the range of 410 MHz to 7.125 GHz, and the second frequency range communication may be 24.25 GHz to 71 GHz. The Hz range may include one or more frequency bands. For example, the first frequency range communication may be sidelink FR1 communication, and the second frequency range communication may be sidelink FR2 communication.

[0017] In some embodiments, the node determines whether a fallback from a second frequency range communication to a first frequency range communication is required for the node. For example, the node may determine whether a fallback from a second frequency range communication to a first frequency range communication is required for the node by at least one of the physical layer, the medium access control (MAC) layer, the radio resource control (RRC) layer, or the application layer.

[0018] In some embodiments, another node (any node other than the node in question) may determine whether a fallback from a second frequency range communication to a first frequency range communication is necessary for the node in question and transmit the determination result to the node. The other node may include at least one of the following: at least one UE, at least one relay node, at least one in-vehicle module, at least one base station, at least one roadside unit, at least one repeater, at least one transponder, at least one wireless router, at least one controller, or at least one access point. For example, the other node may be an Rx UE for sidelink communication, such as UE 104 in Figure 1.

[0019] In some embodiments, the node (or other node) determines whether a fallback from a second frequency range communication to a first frequency range communication is required for the node by detecting a beam fault associated with the node, performing a beam fault recovery operation associated with the node, ensuring that the change in angle of at least one beam associated with the node is greater than a predetermined threshold angle, that the change in the absolute position of the node, the change in the velocity of the node, the change in the acceleration of the node, or the change in the direction of travel of the node is greater than a corresponding first threshold, that the change in the relative position of the node, the change in the relative velocity of the node, the change in the relative acceleration of the node, or the change in the relative direction of travel of the node is greater than a corresponding second threshold, that the measurement of at least one reference signal received power (RSRP) is less than a predetermined threshold, or that the measurement of at least one sidelink RSRP is predetermined Being less than a threshold, Channel Busy Rate (CBR) threshold, a consecutive number of out-of-sync indications received or experienced by the node, the number exceeding a predetermined threshold, the MAC layer instructing the physical layer to generate a negative acknowledgment of data, the physical layer generating a negative acknowledgment of data to the MAC layer, the MAC layer instructing the physical layer to generate a negative acknowledgment for transmission on one or more specific channels, detection of a radio link failure, receiving or transmitting a MAC layer negative acknowledgment to the corresponding side-link hybrid automatic retransmission request (HARQ) entity, failure to receive or transmit a positive acknowledgment for transmission of MAC packet data units (PDUs), the MAC layer HARQ buffer being flushed, the MAC layer HARQ buffer not being flushed, MACThe determination may be based on at least one of the following: transmission or reception of a negative MAC layer acknowledgment for the transmission of a PDU; the number of HARQ retransmissions reaching a predetermined threshold for HARQ retransmissions; an indication of a MAC layer listen-before-talk (LBT) failure; an indication of a MAC layer uplink LBT failure; the physical layer not being instructed by the MAC layer to generate a positive acknowledgment of the data; the physical layer not generating a positive acknowledgment of the data to the MAC layer; the physical random access procedure not being completed; the physical layer not evaluating or reporting a HARQ acknowledgment; or the priority associated with the transmitted data.

[0020] In some embodiments, the node (or other node) may determine within a predetermined duration whether a fallback from a second frequency range communication to a first frequency range communication is required for the node. This may be done using one or more thresholds for the number of event types and / or the number of event occurrences, and if one or more thresholds are reached or exceeded, the node (or other node) may determine that a fallback is required. Alternatively, or in addition, the total number of different event types and / or event occurrences may be used to evaluate one or more thresholds, for example, by assigning different weights to different event types and / or occurrences.

[0021] In some embodiments, the failure described in the present disclosure may be a predicted failure instead of a detected failure. For example, the radio link failure used to determine whether fallback from a second frequency range communication to a first frequency range communication is required for the node may be a predicted radio link failure that is predicted before an actual failure occurs. In some embodiments, the radio link failure may comprise a HARQ-based sidelink radio link failure. In some embodiments, the radio link failure described in the present disclosure may comprise a beam failure.

[0022] In some embodiments, the priority associated with data may be a conditional priority determined by the MAC layer of the node. For example, if one or more resources associated with one or more logical channels having a higher priority are transmitted, one or more resources associated with one or more logical channels having a lower priority are not transmitted. On the other hand, if one or more resources associated with one or more logical channels having a higher priority are not transmitted, one or more resources associated with one or more logical channels having a lower priority are transmitted.

[0023] Method 200 comprises step 206 of transmitting data from the node using the second frequency range communication in response to determining that fallback is not required. For example, in FIG. 1, if UE 102 determines that fallback is not required, UE 102 may transmit data using FR2 communication. The data may be any data.

[0024] The method 200 includes step 206: in response to determining that fallback is required, performing fallback from second frequency range communication to first frequency range communication, and transmitting a simplified version of data from the node using the first frequency range communication. For example, performing fallback may include determining a frequency band of a transmission beam in the first frequency range, and configuring an antenna suitable for the first frequency range communication (e.g., an omnidirectional antenna). In some embodiments, performing fallback may further include sending an indication to a receiving node that instructs the receiving node to switch from the second frequency range communication to the first frequency range communication, so that the receiving node can adjust a reception beam according to the indication.

[0025] In some embodiments, the original data may be associated with a higher conditional priority, while the simplified version of the data may be associated with data having a lower conditional priority. The simplified version of the data may be alternative data that provides a user with information of lower detail and requires less data or a lower data rate than the original data. The simplified version of the data may be a compressed version of the data, one or more images having a higher compression ratio than the compression ratio of the data, and a part of the data that does not include other portions of the data The data may include at least one of the following: a portion of the data that does not contain security-related information or contains less security-related information than the data in question, or a number of images per second that is less than the number of images per second of the data in question. Taking a video data transmission application as an example, if the node determines that the FR2 connection quality is poor, the node may transmit only a simplified version of the data via FR1 in the form of independent "I" frames containing still scenes, while omitting the transmission of data containing "P" and "B" frames containing dynamic scenes. The node may also transmit a simplified version of the data that has been processed to reduce the overhead of the ciphertext size associated with encryption. For example, the node may encrypt the data using symmetric encryption instead of asymmetric encryption, thereby significantly reducing the ciphertext size.

[0026] In some embodiments, method 200 includes performing each of steps 202, 204, and 206. In other embodiments, method 200 includes performing each of steps 202 and 204 without performing step 206. In other embodiments, method 200 includes performing each of steps 202 and 206 in addition to performing step 204.

[0027] In some embodiments, after performing step 206, method 200 may further include a step (not shown in Figure 2) of determining whether it is ready to fall back from the first frequency range communication to the second frequency range communication. For example, the node (or the other node) may determine the link quality or beam quality of the second frequency range communication and determine whether it should switch back to the second frequency range communication to ensure a higher data rate and / or data size.

[0028] When an FR2 failure is predicted or detected, switching from FR2 communication to FR1 communication and sending a simplified version of the data ensures the continuity of ongoing communication and prevents service degradation due to FR2 communication failure, thus improving the perception of the receiving node.

[0029] Figure 3 is a block diagram of a node 300 according to some embodiments of the present disclosure. The node 300 may be mounted on a moving vehicle or in a fixed location. The node 300 may take any form, including but not limited to UEs, relay nodes, vehicles, components mounted on vehicles (e.g., on-board modules), roadside units, repeaters, transponders, controllers, access points, wireless terminals including laptop computers and mobile phones, wireless handheld devices, wireless personal devices, wireless routers, and / or any other forms. The node 300 may be a Tx node in communication, such as UE 102 in Figure 1, or an Rx node in communication, such as UE 104 in Figure 1.

[0030] Referring to Figure 3, node 300 includes an antenna 302 used for transmitting or receiving electromagnetic signals to and from a base station or other UE. Antenna 302 may include one or more antenna elements and may enable different input / output antenna configurations, such as multiple input / multiple output (MIMO) configurations, multiple input / single output (MISO) configurations, and single input / other output (SIMO) configurations. In some embodiments, antenna 302 may include multiple (e.g., 10 or 100) antenna elements and may enable multi-antenna functions such as beamforming. In some embodiments, antenna 302 is a single antenna. Antenna 302 may include one or more FR1 antennas and / or one or more FR2 antennas.

[0031] Node 300 includes a transceiver 304 connected to antenna 302. Transceiver 304 may be a wireless transceiver at node 300 and may communicate bidirectionally with a base station or other UE. For example, transceiver 304 may receive / transmit wireless signals to / from a base station via downlink / uplink communication. Transceiver 304 may also receive / transmit wireless signals to / from other nodes (e.g., UEs or roadside units) via sidelink communication. Transceiver 304 may include a modem that modulates packets, provides the modulated packets to antenna 302 for transmission, and demodulates packets received from antenna 302.

[0032] Node 300 may include memory 306. Memory 306 may be any type of computer-readable storage medium, including volatile or non-volatile memory devices, or a combination thereof. Computer-readable storage medium includes, but is not limited to, non-temporary computer storage medium. Non-temporary storage medium may be accessed by a general-purpose computer or a dedicated computer. Examples of non-temporary storage medium include, but are not limited to, portable computer diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable ROM (EEPROM), digital multipurpose disks (DVDs), flash memory, compact disk (CD)ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, etc. Non-temporary medium may be used to carry or store desired program code means (e.g., instructions and / or data structures) and may be accessed by a general-purpose or dedicated computer, or a general-purpose or dedicated processor. In some examples, software / program code may be transmitted from a remote source (e.g., a website, server, etc.) using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave. In such examples, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave fall within the definition of a medium. Combinations of the above examples also fall within the scope of a computer-readable medium.

[0033] Memory 306 may store an identifier for node 300 and information about signals and / or data received by antenna 302. Memory 306 may also store post-processing signals and / or data. Memory 306 may also store computer-readable program instructions, mathematical models, and algorithms used for signal processing in transceiver 304 and calculations in processor 308. Memory 306 may further store computer-readable program instructions for causing node 300 to operate so that it performs various functions described in this disclosure by being executed by processor 308. In some examples, memory 306 may include a basic input / output system (BIOS) that controls basic hardware or software operations, such as interactions with peripheral components or devices.

[0034] The computer-readable program instructions of this disclosure may be assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​and conventional procedural programming languages. The computer-readable program instructions may be executed entirely on a computing device as a standalone software package, or remotely from a first computing device, partially on the first computing device and partially on a second computing device. In the latter scenario, the second remote computing device is on a local area network (LAN) or a wide area network (WA). The first computing device may be connected through any type of network, including N).

[0035] Node 300 may include a processor 308, which includes a hardware device having processing capabilities. The processor 308 may include at least one of the following: a general-purpose processor, a digital signal processor (DSP), a central processing unit (CPU), a microcontroller, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or other programmable logic device. Examples of general-purpose processors include, but are not limited to, a microprocessor, any conventional processor, a controller, a microcontroller, or a state machine. In some embodiments, the processor 308 may be implemented using a combination of devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration). The processor 308 may receive downlink or sidelink signals from the transceiver 304 and further process the signals. The processor 308 may also receive data packets from the transceiver 304 and further process the packets. In some embodiments, the processor 308 may be configured to operate memory using a memory controller. In some embodiments, the memory controller may be integrated into the processor 308. The processor 308 may be configured to execute computer-readable instructions stored in memory (e.g., memory 306) in order to cause the node 300 to perform various functions.

[0036] Node 300 may include a Global Positioning System (GPS) 310. The GPS 310 may be used to enable location-based services or other services based on the geographical location of Node 300 and / or synchronization between nodes. The GPS 310 may receive Global Navigation System (GNSS) signals from a single satellite or multiple satellite signals via antenna 302 to provide the geographical location of Node 300 (e.g., the coordinates of Node 300). In some embodiments, the GPS 310 is omitted. In some embodiments, a timer is included.

[0037] Node 300 may include an input / output (I / O) device 312 used to communicate the results of signal processing and calculations to a user or other device. The I / O device 312 may include a user interface including a display and an input device for sending user commands to the processor 308. The display may be configured to show the status of signal reception at node 300, data stored in memory 306, the status of signal processing, and the results of calculations, etc. The display may include, but is not limited to, a cathode ray tube (CRT), liquid crystal display (LCD), light-emitting diode (LED), gas plasma display, touchscreen, or other image projection device for displaying information to the user. The input device may be any type of computer hardware equipment used to receive data and control signals from the user. The input device may include, but is not limited to, a keyboard, mouse, scanner, digital camera, joystick, trackball, cursor directional keys, touchscreen monitor, or audio / video commander, etc.

[0038] Node 300 may further include machine interfaces 314 such as an electric bus that connects to a transceiver 304, memory 306, processor 308, GPS 310, and I / O device 312.

[0039] In some embodiments, node 300 provides a second frequency range communication for the node. The Tx node (for example, a TxUE for sidelink communication) may be configured or programmed to determine whether a fallback to a first frequency range communication different from the second frequency range is required, and the node 300 is further configured or programmed to perform at least one of the following: if it is determined that a fallback is not required, it transmits data from the node using the second frequency range communication; or if it is determined that a fallback is required, it performs a fallback from the second frequency range communication to the first frequency range communication and transmits a simplified version of the data from the node using the first frequency range communication.

[0040] Where used in this disclosure, the use of the term "or" within a list of items indicates an inclusive list. A list of items may begin with phrases such as "at least one of" or "one or more of." For example, the list "at least one of A, B, or C" includes A or B or C or AB (i.e., A and B) or AC or BC or ABC (i.e., A, B, and C). Furthermore, where used in this disclosure, beginning a list of conditions with the phrase "based on" shall not be construed as "based on only" a set of conditions, but rather as "based on at least a portion" of the set of conditions. For example, a result described as "based on condition A" may be based on both condition A and condition B without exceeding the scope of this disclosure.

[0041] In this specification, the terms “comprise,” “include,” and “contain” may be used interchangeably and may have the same meaning, and shall be interpreted as open-ended. The terms “comprise,” “include,” and “contain” may be used before a list of elements to indicate that at least all of the elements listed in the list are present, but other elements not listed may also be present. For example, if A includes B and C, then both {B,C} and {B,C,D} are within the scope of A.

[0042] This disclosure describes, in relation to the accompanying drawings, all exemplary configurations or configurations within the scope of this disclosure that are not representative of all possible examples. The term “exemplary” should not be interpreted as “preferred” or “advantageous compared to other examples,” but rather as “exemplary, example, or illustration.” By reading this disclosure, including the description of embodiments and drawings, a person skilled in the art will understand that the art disclosed herein may be carried out using alternative embodiments. A person skilled in the art will understand that the embodiments described herein, or certain features of embodiments, may be combined to arrive at other embodiments for practicing the art described herein. Thus, the disclosure is not limited to the examples and designs described herein, but should be given the broadest scope that matches the principles and novel features disclosed herein.

[0043] The flowcharts and block diagrams in the drawings illustrate examples of the architecture, function, and operation of possible embodiments of systems, methods, and devices according to various embodiments. Note that in some alternative embodiments, the functions described in the blocks may occur in an order other than that shown in the drawings. For example, two blocks shown consecutively may actually be executed substantially simultaneously, or blocks may be executed in reverse order depending on the functions involved. Similarly, additional steps may be included in such methods, and certain steps may be omitted or combined in methods according to various embodiments.

[0044] The described embodiments are not mutually exclusive, and elements, components, materials, or steps described in relation to one exemplary embodiment may be combined with other embodiments in a suitable manner to achieve the desired design objective, or removed from other embodiments. Please understand that it is acceptable to do so.

[0045] Any reference in this specification to “some embodiments” or “some exemplary embodiments” means that certain features, structures, or characteristics described in relation to an embodiment may be included in at least one embodiment. Any occurrences of the phrases “one embodiment,” “some embodiments,” or “another embodiment” in various parts of this disclosure do not necessarily refer to the same embodiment, nor do they necessarily represent separate or alternative embodiments that exclude each other.

[0046] Furthermore, unless otherwise specified or the context makes it clear that the subject matter is singular, the articles “a” and “an” used in this disclosure and the attached claims should generally be interpreted as meaning “one or more.”

[0047] Unless explicitly stated otherwise, each number and range should be interpreted as an approximation, as if the words "about" or "approximately" preceded the value or range value.

[0048] The elements of the claims of the following methods are listed in a specific sequence, if any, but unless the enumeration of the claims separately suggests a specific sequence for carrying out some or all of those elements, those elements are not necessarily intended to be limited to being carried out in that specific sequence.

[0049] Certain features of this disclosure are described in the context of separate embodiments for clarity and should be understood to be provided in combination in a single embodiment. Conversely, various features of the specification are described in the context of a single embodiment for brevity and may also be provided separately, in any suitable subcombination, or as appropriate in any other described embodiment of the specification. Certain features described in the context of different embodiments are not essential features of those embodiments unless otherwise stated.

[0050] It should be further understood that various modifications, substitutions, and variations of the details, materials, and arrangement of the parts described and shown to illustrate the nature of the described embodiments can be made by those skilled in the art without departing from the scope. Accordingly, the following claims encompass all such substitutions, modifications, and variations that fall within the scope of the claims.

[0051] (Note 1) A method for node communication, This includes determining whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, The aforementioned method, In response to the determination that the aforementioned fallback is not required, the node transmits data using the second frequency range communication, or In response to the determination that the aforementioned fallback is necessary, the fallback from the second frequency range communication to the first frequency range communication is performed, and a simplified version of the data is transmitted from the node using the first frequency range communication. Further including at least one of the following: method.

[0052] (Note 2) The node comprises at least one user equipment (UE), at least one relay node, at least one in-vehicle module, at least one base station, at least one roadside unit, at least one repeater, at least one transponder, and at least one A wireless router, at least one controller, or at least one access point, including at least one of these, The method described in Appendix 1.

[0053] (Note 3) Each of the first frequency range communication and the second frequency range communication is a sidelink communication, The method described in Appendix 1.

[0054] (Note 4) The first frequency range communication comprises one or more frequency bands in the range of 410 MHz to 7.125 GHz, and the second frequency range communication comprises one or more frequency bands in the range of 24.25 GHz to 71 GHz. The method described in Appendix 1.

[0055] (Note 5) Determining whether the fallback from the second frequency range communication to the first frequency range communication is necessary for the node is performed by the node. Detection of beam faults associated with the aforementioned node, The beam fault recovery operation associated with the aforementioned node, The change in angle of at least one beam associated with the node is greater than a predetermined threshold angle. The change in the absolute position of the node, the change in the velocity of the node, the change in the acceleration of the node, or the change in the direction of movement of the node is greater than the corresponding first threshold. The change in the relative position of the node, the change in the relative velocity of the node, the change in the relative acceleration of the node, or the change in the relative direction of movement of the node is greater than the corresponding second threshold. At least one measured value of the reference signal received power (RSRP) is less than a predetermined threshold. At least one side-link RSRP measurement is less than a given threshold. Channel busy rate (CBR) threshold, A consecutive number of out-of-sync indications are received or experienced by the node, and the number exceeds a predetermined threshold number. The media access control (MAC) layer instructs the physical layer to generate a negative acknowledgment of the data. The physical layer generates a negative acknowledgment of the data to the MAC layer. The MAC layer instructs the physical layer to generate negative acknowledgments corresponding to transmissions on one or more specific channels. Wireless link fault detection, Receiving or sending a MAC layer negative acknowledgment to a corresponding Sidelink Hybrid Auto-Retransmit Request (HARQ) entity, Failure to receive or transmit positive acknowledgment for the transmission of MAC packet data units (PDUs). The MAC layer HARQ buffer is flushed. The MAC layer HARQ buffer is not flushed. Sending or receiving a MAC layer negative acknowledgment for the transmission of a MAC PDU. The number of HARQ retransmissions reaches a predetermined threshold number of HARQ retransmissions. At least one of the following: an indication showing a MAC layer listen-before-talk (LBT) failure or an indication showing a MAC layer uplink LBT failure. The physical layer is not instructed by the MAC layer to generate positive acknowledgment of the data. The physical layer does not generate positive acknowledgment of data to the MAC layer. The physical random access procedure fails to complete. The HARQ acknowledgment is not evaluated or reported in the aforementioned physical layer, or Priority associated with the data being sent, Based on at least one of the following: The method described in Appendix 1.

[0056] (Note 6) The aforementioned radio link failure includes HARQ-based side-link radio link failures. The method described in Appendix 5.

[0057] (Note 7) The priority associated with the data is a conditional priority determined by the MAC layer, If one or more resources associated with one or more logical channels with a higher priority are sent, then one or more resources associated with one or more logical channels with a lower priority are not sent. The method according to Appendix 5, wherein if one or more resources associated with one or more logical channels having a higher priority are not transmitted, one or more resources associated with one or more logical channels having a lower priority are transmitted.

[0058] (Note 8) The aforementioned data is associated with a higher conditional priority, and the simplified version of the aforementioned data is associated with data having a lower conditional priority. The method described in Appendix 7.

[0059] (Note 9) Determining whether the fallback from the second frequency range communication to the first frequency range communication is required for the node is performed by the node using at least one of the following layers: the physical layer, the media access control (MAC) layer, the radio resource control (RRC) layer, or the application layer. The method described in Appendix 1.

[0060] (Note 10) The simplified version of the data includes at least one of the following: a compressed version of the data, one or more images having a compression ratio higher than the compression ratio of the data, a portion of the data that does not have another portion of the data, a portion of the data that does not have security-related information, a portion of the data that has less security-related information than the data, or a number of images per second that is less than the number of images per second of the data. The method described in Appendix 1.

[0061] (Note 11) A node for communication, Memory for storing instructions, A processor configured to execute the instructions stored in the memory in order to determine whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, Equipped with, The aforementioned processor, In response to the determination that the aforementioned fallback is not required, the node transmits data using the second frequency range communication, or In response to the determination that the aforementioned fallback is necessary, the fallback from the second frequency range communication to the first frequency range communication is performed, and a simplified version of the data is transmitted from the node using the first frequency range communication. To perform at least one of the instructions, the following is further configured to execute the instructions stored in the memory: node.

[0062] (Note 12) The node includes at least one of the following: at least one user equipment (UE), at least one relay node, at least one in-vehicle module, at least one base station, at least one roadside unit, at least one repeater, at least one transponder, at least one wireless router, at least one controller, or at least one access point. The node described in Appendix 11.

[0063] (Note 13) Each of the first frequency range communication and the second frequency range communication is a sidelink communication, The node described in Appendix 11.

[0064] (Note 14) The first frequency range communication comprises one or more frequency bands in the range of 410 MHz to 7.125 GHz, and the second frequency range communication comprises one or more frequency bands in the range of 24.25 GHz to 71 GHz. The node described in Appendix 11.

[0065] (Note 15) Determining whether the fallback from the second frequency range communication to the first frequency range communication is necessary for the node is performed by the node. Detection of beam faults associated with the aforementioned node, The beam fault recovery operation associated with the aforementioned node, The change in angle of at least one beam associated with the node is greater than a predetermined threshold angle. The change in the absolute position of the node, the change in the velocity of the node, the change in the acceleration of the node, or the change in the direction of movement of the node is greater than the corresponding first threshold. If the change in the relative position of the node, the change in the relative velocity of the node, the change in the relative acceleration of the node, or the change in the relative direction of movement of the node is greater than the corresponding second threshold, At least one measured value of the reference signal received power (RSRP) is less than a predetermined threshold. At least one side-link RSRP measurement is less than a given threshold. Channel busy rate (CBR) threshold, A number of consecutive out-of-sync indications are received or experienced by the node, and the number exceeds a predetermined threshold number of occurrences. The media access control (MAC) layer instructs the physical layer to generate a negative acknowledgment of the data. The physical layer generates a negative acknowledgment of the data to the MAC layer. The MAC layer instructs the physical layer to generate negative acknowledgments corresponding to transmissions on one or more specific channels. Wireless link fault detection, Receiving or sending a MAC layer negative acknowledgment to a corresponding Sidelink Hybrid Auto-Retransmit Request (HARQ) entity, Failure to receive or transmit positive acknowledgment for the transmission of MAC packet data units (PDUs). The MAC layer HARQ buffer is flushed. The MAC layer HARQ buffer is not flushed. Sending or receiving a MAC layer negative acknowledgment for the transmission of a MAC PDU. The number of HARQ retransmissions reaches a predetermined threshold number of HARQ retransmissions. At least one of the following: an indication of MAC layer listen-before-talk (LBT) failure or an indication of MAC layer uplink LBT failure. The physical layer does not generate positive acknowledgment of data to the MAC layer. The physical layer is not instructed by the MAC layer to generate positive acknowledgment of the data. The physical random access procedure fails to complete. The HARQ acknowledgment is not evaluated or reported in the aforementioned physical layer, or Priority associated with the data being sent, Based on at least one of the following: The node described in Appendix 11.

[0066] (Note 16) The aforementioned radio link failure includes HARQ-based side-link radio link failures. The node described in Appendix 15.

[0067] (Note 17) The priority associated with the data is a conditional priority determined by the MAC layer, If one or more resources associated with one or more logical channels with a higher priority are sent, then one or more resources associated with one or more logical channels with a lower priority are not sent. The node described in Appendix 15, wherein if one or more resources associated with one or more logical channels having a higher priority are not transmitted, one or more resources associated with one or more logical channels having a lower priority are transmitted.

[0068] (Note 18) The aforementioned data is associated with a higher conditional priority, and the simplified version of the aforementioned data is associated with data having a lower conditional priority. The node described in Appendix 17.

[0069] (Note 19) Determining whether the fallback from the second frequency range communication to the first frequency range communication is required for the node is performed by the node using at least one of the following layers: the physical layer, the media access control (MAC) layer, the radio resource control (RRC) layer, or the application layer. The node described in Appendix 11.

[0070] (Note 20) The simplified version of the data includes at least one of the following: a compressed version of the data, one or more images having a compression ratio higher than the compression ratio of the data, a portion of the data that does not have another portion of the data, a portion of the data that has less security-related information than the data, a portion of the data that does not have security-related information, or a number of images per second that is less than the number of images per second of the data. The node described in Appendix 11.

[0071] (Note 21) A non-temporary computer-readable medium that is executable by one or more processors of a node for communication and stores instructions for performing a method, wherein the method is This includes determining whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, The aforementioned method, In response to the determination that the aforementioned fallback is not required, the node transmits data using the second frequency range communication, or In response to the determination that the aforementioned fallback is necessary, the fallback from the second frequency range communication to the first frequency range communication is performed, and a simplified version of the data is transmitted from the node using the first frequency range communication. Further including at least one of the following: A non-temporary computer-readable medium.

Claims

1. A method for node communication, This includes determining whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, The aforementioned method, In response to the determination that the aforementioned fallback is not required, the node transmits data using the second frequency range communication, or In response to the determination that the aforementioned fallback is necessary, the fallback from the second frequency range communication to the first frequency range communication is performed, and a simplified version of the data is transmitted from the node using the first frequency range communication. Further including at least one of the following: method.

2. The node includes at least one of the following: at least one user equipment (UE), at least one relay node, at least one in-vehicle module, at least one base station, at least one roadside unit, at least one repeater, at least one transponder, at least one wireless router, at least one controller, or at least one access point. The method according to claim 1.

3. Each of the first frequency range communication and the second frequency range communication is a sidelink communication. The method according to claim 1.

4. The first frequency range communication comprises one or more frequency bands in the range of 410 MHz to 7.125 GHz, and the second frequency range communication comprises one or more frequency bands in the range of 24.25 GHz to 71 GHz. The method according to claim 1.

5. Determining whether the fallback from the second frequency range communication to the first frequency range communication is necessary for the node is performed by the node. Detection of beam faults associated with the aforementioned node, The beam fault recovery operation associated with the aforementioned node, The change in angle of at least one beam associated with the node is greater than a predetermined threshold angle. The change in the absolute position of the node, the change in the velocity of the node, the change in the acceleration of the node, or the change in the direction of movement of the node is greater than the corresponding first threshold. The change in the relative position of the node, the change in the relative velocity of the node, the change in the relative acceleration of the node, or the change in the relative direction of movement of the node is greater than the corresponding second threshold. At least one measured value of the reference signal received power (RSRP) is less than a predetermined threshold. At least one side-link RSRP measurement is less than a predetermined threshold. Channel busy rate (CBR) threshold, A consecutive number of out-of-sync indications are received or experienced by the node, and the number exceeds a predetermined threshold number. The Media Access Control (MAC) layer grants negative acknowledgment of the data to the physical layer. Instructing the system to generate a component. The physical layer generates a negative acknowledgment of the data to the MAC layer. The MAC layer instructs the physical layer to generate negative acknowledgments corresponding to transmissions on one or more specific channels. Wireless link fault detection, Receipt or transmission of MAC layer negative acknowledgment to the corresponding Sidelink Hybrid Automated Resend Request (HARQ) entity, Failure to receive or transmit positive acknowledgment for MAC packet data unit (PDU) transmission. The MAC layer HARQ buffer is flushed. The MAC layer HARQ buffer is not flushed. Sending or receiving negative acknowledgment of the MAC layer for sending MAC PDUs. The number of HARQ retransmissions reaches a predetermined threshold number of HARQ retransmissions. At least one of the following: an indication showing a MAC layer listen-before-talk (LBT) failure or an indication showing a MAC layer uplink LBT failure. The physical layer is not instructed by the MAC layer to generate positive acknowledgment of the data. The physical layer does not generate positive acknowledgment of data to the MAC layer. The physical random access procedure fails to complete. The HARQ acknowledgment is not evaluated or reported in the aforementioned physical layer, or Priority associated with the data being sent, Based on at least one of the following: The method according to claim 1.

6. The aforementioned radio link failure includes a HARQ-based side-link radio link failure. The method according to claim 5.

7. The priority associated with the aforementioned data is a conditional priority determined by the MAC layer, When one or more resources associated with one or more logical channels with a higher priority are transmitted, one or more resources associated with one or more logical channels with a lower priority are not transmitted. The method according to claim 5, wherein if one or more resources associated with one or more logical channels having a higher priority are not transmitted, one or more resources associated with one or more logical channels having a lower priority are transmitted.

8. The aforementioned data is associated with a higher conditional priority, and the simplified version of the aforementioned data is associated with data having a lower conditional priority. The method according to claim 7.

9. Determining whether the fallback from the second frequency range communication to the first frequency range communication is required for the node is performed by the node by at least one of the physical layer, the media access control (MAC) layer, the radio resource control (RRC) layer, or the application layer. The method according to claim 1.

10. The simplified version of the aforementioned data is a compressed version of the aforementioned data, with a compression ratio higher than that of the aforementioned data. The data includes at least one of the following: one or more images having a ratio, a portion of the data that does not have another portion of the data, a portion of the data that does not have security-related information, a portion of the data that has less security-related information than the data, or a number of images per second that is less than the number of images per second of the data. The method according to claim 1.

11. A node for communication, Memory for storing instructions, A processor configured to execute the instructions stored in the memory in order to determine whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, Equipped with, The aforementioned processor, In response to the determination that the aforementioned fallback is not required, the node transmits data using the second frequency range communication, or In response to the determination that the aforementioned fallback is necessary, the fallback from the second frequency range communication to the first frequency range communication is performed, and a simplified version of the data is transmitted from the node using the first frequency range communication. To perform at least one of the instructions, the following is further configured to execute the instructions stored in the memory: node.

12. The node includes at least one of the following: at least one user equipment (UE), at least one relay node, at least one in-vehicle module, at least one base station, at least one roadside unit, at least one repeater, at least one transponder, at least one wireless router, at least one controller, or at least one access point. The node according to claim 11.

13. Each of the first frequency range communication and the second frequency range communication is a sidelink communication. The node according to claim 11.

14. The first frequency range communication comprises one or more frequency bands in the range of 410 MHz to 7.125 GHz, and the second frequency range communication comprises one or more frequency bands in the range of 24.25 GHz to 71 GHz. The node according to claim 11.

15. Determining whether the fallback from the second frequency range communication to the first frequency range communication is necessary for the node is performed by the node. Detection of beam faults associated with the aforementioned node, The beam fault recovery operation associated with the aforementioned node, The change in angle of at least one beam associated with the node is greater than a predetermined threshold angle. The change in the absolute position of the node, the change in the velocity of the node, the change in the acceleration of the node, or the change in the direction of movement of the node is greater than the corresponding first threshold. If the change in the relative position of the node, the change in the relative velocity of the node, the change in the relative acceleration of the node, or the change in the relative direction of movement of the node is greater than the corresponding second threshold, At least one measured value of the reference signal received power (RSRP) is less than a predetermined threshold. At least one side-link RSRP measurement is less than a predetermined threshold. Channel busy rate (CBR) threshold, A number of consecutive out-of-sync indications are received or experienced by the node, and the number exceeds a predetermined threshold number of occurrences. The media access control (MAC) layer instructs the physical layer to generate a negative acknowledgment of the data. The physical layer generates a negative acknowledgment of the data to the MAC layer. The MAC layer instructs the physical layer to generate negative acknowledgments corresponding to transmissions on one or more specific channels. Wireless link fault detection, Receipt or transmission of MAC layer negative acknowledgment to the corresponding Sidelink Hybrid Automated Resend Request (HARQ) entity, Failure to receive or transmit positive acknowledgment for MAC packet data unit (PDU) transmission. The MAC layer HARQ buffer is flushed. The MAC layer HARQ buffer is not flushed. Sending or receiving negative acknowledgment of the MAC layer for sending MAC PDUs. The number of HARQ retransmissions reaches a predetermined threshold number of HARQ retransmissions. At least one of the following: an indication of MAC layer listen-before-talk (LBT) failure or an indication of MAC layer uplink LBT failure. The physical layer does not generate positive acknowledgment of data to the MAC layer. The physical layer is not instructed by the MAC layer to generate positive acknowledgment of the data. The physical random access procedure fails to complete. The HARQ acknowledgment is not evaluated or reported in the aforementioned physical layer, or Priority associated with the data being sent, Based on at least one of the following: The node according to claim 11.

16. The aforementioned radio link failure includes a HARQ-based side-link radio link failure. The node according to claim 15.

17. The priority associated with the aforementioned data is a conditional priority determined by the MAC layer, When one or more resources associated with one or more logical channels with a higher priority are transmitted, one or more resources associated with one or more logical channels with a lower priority are not transmitted. The node according to claim 15, wherein if one or more resources associated with one or more logical channels having a higher priority are not transmitted, one or more resources associated with one or more logical channels having a lower priority are transmitted.

18. The aforementioned data is associated with a higher conditional priority, and the simplified version of the aforementioned data is associated with data having a lower conditional priority. The node according to claim 17.

19. Determining whether the fallback from the second frequency range communication to the first frequency range communication is required for the node is performed by the node by at least one of the physical layer, the media access control (MAC) layer, the radio resource control (RRC) layer, or the application layer. The node according to claim 11.

20. The simplified version of the data includes at least one of the following: a compressed version of the data, one or more images having a compression ratio higher than the compression ratio of the data, a portion of the data that does not have another portion of the data, a portion of the data with less security-related information than the data, a portion of the data that does not have security-related information, or a number of images per second that is less than the number of images per second of the data. The node according to claim 11.

21. A non-temporary computer-readable medium that is executable by one or more processors of a node for communication and stores instructions for executing a method, wherein the method is This includes determining whether a fallback from a second frequency range communication to a first frequency range communication different from the second frequency range is required for the node, The aforementioned method, In response to the determination that the aforementioned fallback is not required, the node transmits data using the second frequency range communication, or In response to the determination that the aforementioned fallback is necessary, the fallback from the second frequency range communication to the first frequency range communication is performed, and a simplified version of the data is transmitted from the node using the first frequency range communication. Further including at least one of the following: A non-temporary computer-readable medium.

Images