Random access method and related device

Abstract

The present application relates to the technical field of communications, and provides a random access method and a related device. In the method, when a reading device sends first signaling for triggering random access, a time-frequency resource used for three-step random access and a time-frequency resource used for two-step random access can be indicated. Upon receiving the first signaling, an ambient Internet of Things device can select the time-frequency resource for the three-step random access to access the reading device by means of the three-step random access, or select the time-frequency resource for the two-step random access to access the reading device by means of the two-step random access. In this way, when the amount of electricity of the ambient Internet of Things device is low, the two-step random access can be used to perform random access to the reading device, and the failure of the three-step random access caused by insufficient electricity can be avoided.

Description

Random access method and related device

[0001] This application claims priority to the Chinese patent application No. 202411377645.7, filed on September 29, 2024, and entitled "Random access method and related device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to a random access method of an ambient internet of things (A-IoT) device and related device. BACKGROUND

[0003] An A-IoT device generally refers to an internet of things device that does not have a battery itself, and is driven by converting environmental energy collected from radio waves, light, motion, heat or any other available environmental energy into electrical energy.

[0004] In some cases, if the speed of converting electrical energy by the A-IoT device is less than the speed of consuming electrical energy to drive the A-IoT device or the stored electrical energy is less, it will cause the A-IoT device to have insufficient electrical energy to complete a complete communication process (such as a random access (RA) process, etc.). Therefore, it may affect the communication between the A-IoT device and other devices (such as a base station (BS), an intermediate node (IN) device, etc. reader (RD)), for example, it may cause high communication delay, communication failure, etc. SUMMARY

[0005] Embodiments of the present application provide a random access method and related device.

[0006] In a first aspect, a random access method is provided, applied to an ambient internet of things device, the method comprising: receiving first signaling sent by a reader device, the first signaling indicating at least one first type of time-frequency resource of a first random access mode and at least one second type of time-frequency resource of a second random access mode; in response to the first signaling, determining to access the reader device using the first random access mode and a first time-frequency resource, or determining to access the reader device using the second random access mode and a second time-frequency resource, wherein the first time-frequency resource is a time-frequency resource in the first type of time-frequency resource, and the second time-frequency resource is a time-frequency resource in the second type of time-frequency resource.

[0007] By the above method, since the reading device provides time-frequency resources for the two random access modes, the environmental Internet of Things device can access the reading device according to its own situation by using the first random access mode or the second random access mode, so that it can avoid being unable to successfully access the reading device due to insufficient power and the like. For example, if the power is low or the access delay requirement is high, the random access mode (for example, the second random access mode) with less power consumption can be used for access.

[0008] In some implementations, the first identifier can be a random identifier generated by the environmental Internet of Things device.

[0009] In a possible implementation of the first aspect, the first random access mode is a three-step random access, and the second random access mode is a two-step random access.

[0010] In a possible implementation of the first aspect, the determining to access the reading device by using the first random access mode and the first time-frequency resource or the second random access mode and the second time-frequency resource includes: determining to access the reading device by using the first random access mode and the first time-frequency resource or the second random access mode and the second time-frequency resource based on a type of the environmental Internet of Things device or a remaining power of the environmental Internet of Things device.

[0011] In this implementation, the environmental Internet of Things device can determine which random access mode to use to access the reading device based on the type (for example, type 1, type 2a, and type 2b below) or the remaining power of the environmental Internet of Things device, and the like. For example, the environmental Internet of Things device can use the first random access mode to access the reading device if the access power condition below is met.

[0012] In a possible implementation of the first aspect, the method further includes: accessing the reading device by using the determined random access mode and time-frequency resource.

[0013] In a possible implementation of the first aspect, the accessing the reading device by using the determined random access mode and time-frequency resource includes: in a case where it is determined to access the reading device by using the first random access mode and the first time-frequency resource, sending a first message to the reading device through the first time-frequency resource, where the first message includes a first identifier; receiving a second message sent by the reading device, where the second message includes the first identifier; and in response to the second message, sending a third message to the reading device, where the third message includes a device identifier of the environmental Internet of Things device.

[0014] In a possible implementation of the first aspect, the second message indicates a third time-frequency resource for transmitting a third message; and in response to the second message, transmitting the third message to the reading device comprises: transmitting the third message to the reading device through the third time-frequency resource.

[0015] In a possible implementation of the first aspect, the method further comprises: switching to the sleep state or the shutdown state after transmitting the third message to the reading device.

[0016] In this implementation, after transmitting the third message to the reading device, the environmental IoT device can switch to the sleep state or the shutdown state for charging, so as to respond to other requests or signaling of the reading device with sufficient power next time.

[0017] In a possible implementation of the first aspect, the accessing the reading device through the determined random access manner and time-frequency resource comprises: in a case where it is determined to access the reading device through the second random access manner and the second time-frequency resource, transmitting a fourth message to the reading device through the second time-frequency resource, where the fourth message comprises the second identifier and a device identifier of the environmental IoT device, or the fourth message comprises the device identifier; and receiving a fifth message transmitted by the reading device, the fifth message comprising the second identifier and / or the device identifier.

[0018] In some implementations, in a case where the fourth message comprises the second identifier and the device identifier of the environmental IoT device, the fifth message can comprise the second identifier and / or the device identifier; and in a case where the fourth message comprises the device identifier of the environmental IoT device but does not comprise the second identifier, the fifth message can comprise the device identifier.

[0019] In a possible implementation of the first aspect, the second time-frequency resource is after the first time-frequency resource in time domain; and the method further comprises: in response to the first signaling, switching to the sleep state or the shutdown state; and before a transmission occasion of the second time-frequency resource arrives, switching to the working state.

[0020] In a possible implementation of the first aspect, the method further comprises: in response to the fifth message, switching to the sleep state or the shutdown state.

[0021] In a possible implementation of the first aspect, the method further comprises: before switching to the sleep state or the shutdown state, storing a first state identifier, the first state identifier indicating that the random access of the environmental IoT device is not completed.

[0022] In a possible implementation of the first aspect, the first type of time-frequency resources are after the second type of time-frequency resources in time domain, or the second type of time-frequency resources are after the first type of time-frequency resources in time domain, or the first type of time-frequency resources are different from the second type of time-frequency resources in frequency domain and the first type of time-frequency resources overlap the second type of time-frequency resources in time domain.

[0023] In a possible implementation of the first aspect, the first type of time-frequency resources and the second type of time-frequency resources are predefined time-frequency resources, and the first signaling includes a quantity of the first type of time-frequency resources and a quantity of the second type of time-frequency resources.

[0024] In this implementation, the first message can indicate the first type of time-frequency resources and the second type of time-frequency resources by the quantity of the first type of time-frequency resources and the quantity of the second type of time-frequency resources (for example, the first indication manner below).

[0025] In a possible implementation of the first aspect, the first signaling further indicates an order of the first type of time-frequency resources and the second type of time-frequency resources.

[0026] In a possible implementation of the first aspect, the first signaling includes: a quantity of the first type of time-frequency resources and a quantity of the second type of time-frequency resources, a starting frequency and a starting time of a first time-frequency resource in the at least one first type of time-frequency resource, a frequency domain size and a time domain size of the first type of time-frequency resources, a time domain offset and a frequency domain offset of each first type of time-frequency resource relative to the first time-frequency resource of the first type of time-frequency resources, a starting frequency and a starting time of a first time-frequency resource in the at least one second type of time-frequency resource, a frequency domain size and a time domain size of the second type of time-frequency resources, a time domain offset and a frequency domain offset of each second type of time-frequency resource relative to the first time-frequency resource of the second type of time-frequency resources.

[0027] In some implementations, the frequency domain size and the time domain size of the first type of time-frequency resources can be the frequency domain size and the time domain size of each first type of time-frequency resource. If the frequency domain size and the time domain size of each first type of time-frequency resource are the same, the frequency domain size and the time domain size of the first type of time-frequency resources can include only one frequency domain size and one time domain size; if there is a first type of time-frequency resource whose frequency domain size and / or time domain size is different from that of another first type of time-frequency resource, the first signaling can indicate the frequency domain size and the time domain size of each first type of time-frequency resource respectively.

[0028] In some implementations, the frequency domain size and the time domain size of the second type of time-frequency resource can be the frequency domain size and the time domain size of each second type of time-frequency resource. If the frequency domain size and the time domain size of each second type of time-frequency resource are the same, the frequency domain size and the time domain size of the second type of time-frequency resource can only include one frequency domain size and one time domain size; if there is a second type of time-frequency resource whose frequency domain size and / or time domain size is different from that of another second type of time-frequency resource, the first signaling can respectively indicate the frequency domain size and the time domain size of each second type of time-frequency resource.

[0029] In a possible implementation of the first aspect, the first signaling includes the starting time, the starting frequency, the time domain size and the frequency domain size of each first type of time-frequency resource, and the starting time, the starting frequency, the time domain size and the frequency domain size of each second type of time-frequency resource.

[0030] In a second aspect, a random access method is provided, which is applied to a reading device. The method includes: sending first signaling, the first signaling indicating at least one first type of time-frequency resource of a first random access mode and at least one second type of time-frequency resource of a second random access mode; receiving a first message sent by a first environmental Internet of Things device through the first type of time-frequency resource, and / or a fourth message sent by a second environmental Internet of Things device through the second type of time-frequency resource, wherein the first message includes a first identifier, the fourth message includes a second device identifier of the second environmental Internet of Things device, or the fourth message includes the second device identifier and a second identifier; sending a second message to the first environmental Internet of Things device in response to the first message, and / or sending a fifth message to the second environmental Internet of Things device in response to the fourth message, wherein the second message includes the first identifier, and the fifth message includes the second device identifier and / or the second identifier.

[0031] In some implementations, in the case where the second identifier and the second device identifier of the environmental Internet of Things device are included in the fourth message, the fifth message can include the second identifier and / or the second device identifier; in the case where the second device identifier of the second environmental Internet of Things device is included in the fourth message without the second identifier, the fifth message can include the second device identifier.

[0032] In this implementation, when sending the first signaling for triggering the environmental Internet of Things device to perform random access with the reading device, the reading device can indicate time-frequency resources (first type of time-frequency resources and second type of time-frequency resources) for the two random access modes (the first random access mode and the second random access mode), and the environmental Internet of Things device can access the reading device by using the first random access mode or the second random access mode according to its own situation. Moreover, after receiving the messages (the first message and the fourth message) sent by the environmental Internet of Things device by using different random access modes (by using different types of time-frequency resources), the reading device can reply to the environmental Internet of Things device based on the corresponding mode (the second message and the fifth message).

[0033] In this way, it can be avoided that the environmental Internet of Things device cannot successfully access the reading device due to insufficient power or the like. For example, if the power is low or the access delay requirement is high, the random access mode (for example, the second random access mode) that consumes less power can be used for access.

[0034] In a possible implementation of the second aspect, the second message indicates third time-frequency resources; and the method further includes: receiving a third message sent by the first environmental Internet of Things device, the third message including a first device identifier of the first environmental Internet of Things device.

[0035] In a possible implementation of the second aspect, the second message includes a state switching indication, the state switching indication being used to indicate that the first environmental Internet of Things device switches to a sleep state or a shutdown state after sending the third message.

[0036] In a possible implementation of the second aspect, the fifth message includes a state switching indication, the state switching indication being used to indicate that the second environmental Internet of Things device switches to a sleep state or a shutdown state.

[0037] In a possible implementation of the second aspect, the first type of time-frequency resources is after the second type of time-frequency resources in the time domain, or the second type of time-frequency resources is after the first type of time-frequency resources in the time domain, or the first type of time-frequency resources is different from the second type of time-frequency resources in the frequency domain and the first type of time-frequency resources overlaps the second type of time-frequency resources in the time domain.

[0038] In a possible implementation of the second aspect, the first type of time-frequency resources and the second type of time-frequency resources are predefined time-frequency resources, and the first signaling includes a quantity of the first type of time-frequency resources and a quantity of the second type of time-frequency resources.

[0039] In a possible implementation of the second aspect, the first signaling further indicates an order of the first type of time-frequency resources and the second type of time-frequency resources.

[0040] In a possible implementation of the second aspect, the first signaling includes a number of the first type of time-frequency resources and a number of the second type of time-frequency resources, a starting frequency and a starting time of a first time-frequency resource in the at least one first type of time-frequency resource, a frequency domain size and a time domain size of the first type of time-frequency resources, a time domain offset and a frequency domain offset of each first type of time-frequency resource relative to the first time-frequency resource of the first type of time-frequency resources, a starting frequency and a starting time of a first time-frequency resource in the at least one second type of time-frequency resource, a frequency domain size and a time domain size of the second type of time-frequency resources, a time domain offset and a frequency domain offset of each second type of time-frequency resource relative to the first time-frequency resource of the second type of time-frequency resources.

[0041] In some implementations, the frequency domain size and the time domain size of the first type of time-frequency resources can be a frequency domain size and a time domain size of each first type of time-frequency resource. If the frequency domain size and the time domain size of each first type of time-frequency resource are the same, the frequency domain size and the time domain size of the first type of time-frequency resources can include only one frequency domain size and one time domain size; if there is a first type of time-frequency resource whose frequency domain size and / or time domain size is different from that of another first type of time-frequency resource, the first signaling can respectively indicate the frequency domain size and the time domain size of each first type of time-frequency resource.

[0042] In some implementations, the frequency domain size and the time domain size of the second type of time-frequency resources can be a frequency domain size and a time domain size of each second type of time-frequency resource. If the frequency domain size and the time domain size of each second type of time-frequency resource are the same, the frequency domain size and the time domain size of the second type of time-frequency resources can include only one frequency domain size and one time domain size; if there is a second type of time-frequency resource whose frequency domain size and / or time domain size is different from that of another second type of time-frequency resource, the first signaling can respectively indicate the frequency domain size and the time domain size of each second type of time-frequency resource.

[0043] In a possible implementation of the second aspect, the first signaling includes a starting time, a starting frequency, a time domain size and a frequency domain size of each first type of time-frequency resource, and a starting time, a starting frequency, a time domain size and a frequency domain size of each second type of time-frequency resource.

[0044] In a possible implementation of the second aspect, the first random access manner is a three-step random access, and the second random access manner is a two-step random access.

[0045] In a third aspect, a random access method is provided, which comprises: reading first signaling sent by a reading device, the first signaling comprising first time-frequency resources of at least one first random access mode and at least one second time-frequency resource corresponding to a second random access mode; and in response to the first signaling, determining to access the reading device using the first random access mode and a first time-frequency resource, or determining to access the reading device using the second random access mode and a second time-frequency resource, wherein the first time-frequency resource is a time-frequency resource in the first time-frequency resources, and the second time-frequency resource is a time-frequency resource in the second time-frequency resources.

[0046] In this implementation, when the reading device sends the first signaling for triggering the A-IoT device to perform random access with the reading device, the reading device can indicate the time-frequency resources (the first time-frequency resources and the second time-frequency resources) for the two random access modes (the first random access mode and the second random access mode), and the A-IoT device can access the reading device using the first random access mode or the second random access mode according to its own situation.

[0047] In a fourth aspect, an A-IoT device is provided, which comprises: an energy storage circuit configured to convert energy in an environment into electrical energy; and a processing circuit configured to implement the random access method provided in any of the implementation manners of the first aspect.

[0048] In a fifth aspect, a reading device is provided, which comprises: a memory configured to store instructions; and at least one processor configured to execute the instructions to cause the reading device to implement the random access method provided in any of the implementation manners of the second aspect.

[0049] In a sixth aspect, a computer-readable storage medium is provided, which stores computer-executable program instructions, which, when executed on a computer, cause the computer to perform the random access method provided in any of the implementation manners of the first aspect to the third aspect.

[0050] In a seventh aspect, a computer program product is provided, which comprises computer program code, which, when executed on a computer, causes the computer to perform the random access method provided in any of the implementation manners of the first aspect to the second aspect.

[0051] It should be understood that the beneficial effects of the above-mentioned second aspect to the seventh aspect can refer to the description of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0052] FIG. 1 shows a topology diagram of an RD and an A-IoT device according to some embodiments of the present application.

[0053] FIG. 2 shows a schematic diagram of a 2RA procedure, according to some embodiments of the present application.

[0054] FIG. 3 shows a schematic diagram of a 3RA procedure, according to some embodiments of the present application.

[0055] FIG. 4A shows a schematic diagram of an interaction procedure of a random access method in which 3RA MSG1 time-frequency resources are after 2RA MSG1 time-frequency resources in time domain, according to some embodiments of the present application.

[0056] FIG. 4B shows a schematic diagram of a procedure of a random access method in which 3RA MSG1 time-frequency resources are after 2RA MSG1 time-frequency resources in time domain, according to some embodiments of the present application.

[0057] FIG. 4C shows a schematic diagram of time and frequency domain division of each time-frequency resource in FIG. 4B, according to some embodiments of the present application.

[0058] FIG. 5A shows a schematic diagram of adding a control packet to a physical layer data field for transmission, according to some embodiments of the present application.

[0059] FIG. 5B shows a schematic diagram of adding time-frequency resource indication information to high layer signaling and transmitting through a physical layer data field, according to some embodiments of the present application.

[0060] FIG. 6A shows a schematic diagram of an interaction procedure of a random access method in which 2RA MSG1 time-frequency resources are after 3RA MSG1 time-frequency resources in time domain, according to some embodiments of the present application.

[0061] FIG. 6B shows a schematic diagram of a procedure of a random access method in which 2RA MSG1 time-frequency resources are after 3RA MSG1 time-frequency resources in time domain, according to some embodiments of the present application.

[0062] FIG. 6C shows a schematic diagram of time and frequency domain division of each time-frequency resource in FIG. 6B, according to some embodiments of the present application.

[0063] FIG. 7A shows a schematic diagram of an interaction procedure of a random access method corresponding to frequency division of 2RA MSG1 time-frequency resources and 3RA MSG1 time-frequency resources, according to some embodiments of the present application.

[0064] FIG. 7B shows a schematic diagram of a procedure of a random access method corresponding to frequency division of 2RA MSG1 time-frequency resources and 3RA MSG1 time-frequency resources, according to some embodiments of the present application.

[0065] FIG. 7C shows a schematic diagram of time and frequency domain division of each time-frequency resource in FIG. 7B, according to some embodiments of the present application.

[0066] FIG. 8 shows an interaction flow diagram of another random access method according to some embodiments of the present application.

[0067] FIG. 9 shows a structure diagram of an RD according to some embodiments of the present application.

[0068] FIG. 10 shows a structure diagram of an A-IoT device according to some embodiments of the present application. DETAILED DESCRIPTION

[0069] Embodiments of the present application include, but are not limited to, a random access method and related devices.

[0070] For ease of understanding, first introduce the terms involved in the present application.

[0071] (1) A-IoT device

[0072] A-IoT device generally refers to an Internet of Things device that does not have a battery itself, and drives itself by collecting environmental energy from radio waves, light, motion, heat or any other available environmental energy, and converting the collected energy into electrical energy. Illustratively, the A-IoT device can include an antenna and collect environmental energy by receiving electromagnetic waves in the environment through the antenna, and store the collected energy in energy storage devices (such as capacitors, inductors, etc.).

[0073] A-IoT devices are divided into three types of devices, 1-type A-IoT device (device 1), 2a-type A-IoT device (device 2a) and 2b-type A-IoT device (device 2b), and 2a-type A-IoT device and 2b-type A-IoT device are also called 2-type A-IoT device (device 2). Among them:

[0074] The peak power of the 1-type A-IoT device is less than 1 microwatt (μW), does not have uplink or downlink amplification circuit, and transmits uplink data by backscattering external carrier wave (CW).

[0075] The peak power of the 2a-type A-IoT device is less than hundreds of microwatts (μW), has uplink and downlink amplification circuit, and transmits uplink data by backscattering external carrier wave.

[0076] The peak power of the 2b-type A-IoT device is less than hundreds of microwatts (μW), has uplink and downlink amplification circuit, and transmits uplink data by itself generated carrier wave.

[0077] (2) State of A-IoT device

[0078] An A-IoT device can include three states: working (ON), sleeping (SLEEP), and off (OFF). Among them, the A-IoT device in the working state at least supports data sending and data receiving; the A-IoT device in the sleeping state at least supports maintaining data in the working state, maintaining a timer, and at least does not support data sending; and the A-IoT device in the off state does not support data sending and data receiving, and at least supports energy harvesting (for example, harvesting energy in the environment and converting it into electrical energy).

[0079] It should be noted that the A-IoT device in the working state and the A-IoT device in the sleeping state can support energy harvesting, or can not support energy harvesting.

[0080] It should be noted that the state of the A-IoT device can also be more or less, which is not limited here.

[0081] (3) Reading device

[0082] RD generally refers to a device that directly communicates with the A-IoT device, including IN devices, BS, and the like.

[0083] Exemplarily, the networking topology of the A-IoT device includes two types:

[0084] Referring to (a) in FIG. 1, the A-IoT device can indirectly communicate with the BS through one or more IN devices, that is, the A-IoT device directly communicates with the IN device (for example, a mobile phone, a tablet computer, and the like, which can communicate with the BS User device), and the IN device directly communicates with the BS (optional). In this topology, the IN device can be an RD.

[0085] Referring to (b) in FIG. 1, the A-IoT device can directly communicate with the BS. In this topology, the BS can be an RD.

[0086] (4) RA

[0087] RA is a way of establishing a communication connection between electronic devices. In RA, the communication parties complete access by sending and receiving random numbers (or random identifiers). RA can be divided into contention-based random access (CBRA) and contention-free random access (CFRA).

[0088] (5) CBRA process of A-IoT device

[0089] After receiving the message triggering RA, the A-IoT device can implement the CBRA procedure in the following two ways.

[0090] The first one is CBRA including three steps (S1, S2 and S3).

[0091] S1, the A-IoT device determines the CBRA corresponding occasion or resource.

[0092] S2, contention resolution.

[0093] S2.1, the A-IoT device sends a random identifier (RID) to the RD. The RID can be randomly generated, can be generated based on the device identifier (DID) of the A-IoT device, or can be generated in other ways.

[0094] S2.2, the RD sends a receiving response (including the RID) to the A-IoT device. The RD can send a response including the received RID to the A-IoT device to indicate that the contention has been successfully resolved in the case that the contention has been successfully resolved (i.e., there is no conflict between the A-IoT device and other A-IoT devices).

[0095] S3, the A-IoT device sends the DID to the RD.

[0096] The A-IoT device determines that the contention has been successfully resolved in the case that it receives the same response as the sent RID, and sends the DID (and / or other data (such as instructions, etc.)) to the RD.

[0097] The above random access procedure can be referred to as 3-step RA (hereinafter referred to as 3RA). Among them, the message including the RID sent by the A-IoT device to the RD in S2.1 can be referred to as message one (MSG1) of 3-step RA (hereinafter referred to as 3RA MSG1); the message including the RID sent by the RD to the A-IoT device in S2.2 can be referred to as message two (MSG2) of 3-step RA (hereinafter referred to as 3RA MSG2); the message including the DID sent by the A-IoT device to the RD in S2.3 can be referred to as message three (MSG3) of 3-step RA (hereinafter referred to as 3RA MSG3).

[0098] The second one is CBRA including two steps (S1 and S2).

[0099] S1, the A-IoT determines the occasion or resource of CBRA.

[0100] S2, contention resolution.

[0101] S2.1', the A-IoT device sends the RID and DID to the RD.

[0102] Optionally, in step S2.1', the A-IoT device can also send the DID without sending the RID.

[0103] S2.2', the RD sends a reception response (including the received RID) to the A-IoT.

[0104] Optionally, if the A-IoT device sends the DID without sending the RID in step S2.1', the RD can also include the DID without including the RID in the reception response sent in S2.2'.

[0105] The above random access procedure can be referred to as 2-step RA (hereinafter referred to as 2RA). Among them, the message sent by the A-IoT device to the RD in S2.1' including the RID and DID (or including the DID without the RID) can be referred to as message 1 (MSG1) of 2-step RA (hereinafter referred to as 2RA MSG1); the message sent by the RD to the A-IoT device in S2.2' including the RID (or including the DID) can be referred to as message 2 (MSG2) of 2-step RA (hereinafter referred to as 2RA MSG2).

[0106] It should be noted that the specific procedures of 3RA and 2RA will be described in detail below, and will not be described here.

[0107] (6) Inventory

[0108] Inventory generally refers to a communication service initiated by the RD to obtain the DID of multiple A-IoT devices. The multiple A-IoT devices access the RD through CBRA and send their own DID to the RD, so that the RD can obtain the DID of the A-IoT within its signal coverage. For example, in the scenario of a warehouse, different goods can carry A-IoT devices with different DID, and the RD can trigger the A-IoT devices in the warehouse to connect with the RD through CBRA to obtain the DID of each A-IoT device, and obtain the goods in the warehouse based on the association between the DID and the goods.

[0109] The technical solutions of the embodiments of the present application will be described below with reference to the accompanying drawings.

[0110] As described in the background, if the speed of the A-IoT device converting the electrical energy is less than the speed of the A-IoT device consuming the electrical energy or the A-IoT device has less stored energy, the A-IoT device can not have enough electrical energy to complete a complete communication process (such as random access (RA) and the like), which affects the communication of the A-IoT device with other devices.

[0111] For example, for a type 1 A-IoT device, due to the low power, the time for consuming the stored energy is usually several seconds, and the time for a 3RA is usually tens of milliseconds, which does not consume the stored energy of the type 1 A-IoT device. When receiving the first signaling triggering the RA, if the power of the type 1 A-IoT device is not enough to ensure that the type 1 A-IoT device is in the working state for a time greater than or equal to the time for performing a 3RA process, the 3RA process of the type 1 A-IoT device will fail.

[0112] For another example, the power of a type 2 A-IoT device is higher, and the time for consuming the stored energy is usually several milliseconds to tens of milliseconds. The power of the type 2 A-IoT device converting the environmental energy is much less than the power of the type 2 A-IoT device performing the CBRA process, which can cause the power of the type 2 A-IoT device to be depleted before a 3RA process is completed. The type 2 A-IoT needs to be recharged and continue or re-perform the 3RA process after the charging is completed. Since the time for the type 2 A-IoT to be recharged is large (usually several seconds to tens of seconds), the delay of the CBRA is too high. For example, if the power of the type 2 A-IoT device is depleted after sending the 3RAMSG1, the type 2 A-IoT device will not be able to receive the 3RAMSG2 sent by the RD; if the power of the type 2 A-IoT device is depleted after receiving the 3RAMSG2, the type 2 A-IoT device will not be able to send the 3RAMSG3 to the RD. Thus, in the inventory process, the RD can not be able to obtain the DID of some type 2 A-IoT devices, resulting in inaccurate inventory results.

[0113] Since in the 2RA process, the A-IoT device only needs to send information to the RD once (2RAMSG1), and in the 3RA process, the A-IoT device needs to send information to the RD twice (3RAMSG1 and 3RAMSG2). Although the effective data (DID and RID) carried in the 2RAMSG1 and the 3RAMSG1 and the 3RAMSG2 are the same, other data (such as check code, control information, and the like) also need to be transmitted in the transmission process of the message, and thus, the 3RA process needs to transmit more data than the 2RA process. In addition, triggering the A-IoT device to send or receive data also consumes additional electrical energy, and the electrical energy consumed by the 3RA process is higher than the electrical energy consumed by the 2RA process.

[0114] Based on this, the embodiment of the application provides a random access method. When the RD transmits the first signaling (used for indicating that a plurality of A-IoT devices randomly access the RD), the RD can indicate the first type of time-frequency resource used for transmitting 3RAMSG1 and the second type of time-frequency resource used for transmitting 2RAMSG1. After receiving the first signaling, the A-IoT device can randomly access the RD in different ways (3RA or 2RA) based on whether the remaining power of the A-IoT device can complete the 3RA process.

[0115] Exemplarily, the A-IoT device can randomly access the RD in the 3RA manner when an access power condition is met (the access power condition indicates that the remaining power of the A-IoT device can complete the 3RA process, for example, the A-IoT device is a type-1 A-IoT device, the remaining power is greater than a power threshold, the remaining power maintains the A-IoT device in an operating state for a time length greater than an operating time length threshold, the remaining power can send a message a number of times greater than a number threshold, and the like); and randomly access the RD in the 2RA manner when the access power condition is not met.

[0116] Based on the above method, the first signaling configures two types of time-frequency resources, and the A-IoT device can randomly access in the 2RA or 3RA manner based on whether the A-IoT device meets the access power condition. In this way, when the power of the A-IoT device is lower than the power required for the 3RA process and higher than the power required for the 2RA process, the A-IoT device can randomly access the RD in the 2RA manner, without interrupting the 3RA process and resuming or restarting the 3RA process after charging, which is beneficial to reduce the delay of random access.

[0117] For ease of understanding, the specific content of the 2RA process and the 3RA process will be introduced first.

[0118] First, the 2RA process is introduced.

[0119] Exemplarily, FIG. 2 shows a schematic diagram of a 2RA process according to some embodiments of the application. As shown in FIG. 2, the process includes:

[0120] S201, the RD transmits first signaling, and the first signaling indicates a plurality of 2RAMSG1 time-frequency resources.

[0121] The RD can transmit the first signaling according to a business need of the RD itself or a request (for example, an inventory request) sent by another device. The first signaling can indicate one or more time-frequency resources (2RAMSG1 time-frequency resources, that is, the second type of time-frequency resource) used for transmitting 2RAMSG1.

[0122] In some embodiments, the first signaling can indicate a device identity or a device group of the A-IoT device that needs to respond to the first signaling, or indicate that all devices need to respond to the first signaling.

[0123] It should be noted that the time-frequency resource refers to a wireless resource used to carry a message in a communication system, including a time domain resource and a frequency domain resource. The unit of the time domain resource can be a chip, a symbol, a slot, or a millisecond (ms), etc. The unit of the frequency domain resource can be a resource block (RB) or a resource element (RE). In some embodiments, the time-frequency resource used for transmitting the 2RAMSG1 and the 3RAMSG1 can also be referred to as an access occasion.

[0124] The manner in which the first signaling indicates the 2RAMSG1 time-frequency resource will be described below, and will not be described here.

[0125] S202, the A-IoT device selects a 2RAMSG1 time-frequency resource, and sends a 2RAMSG1 to the RD through the selected 2RAMSG1 time-frequency resource, wherein the 2RAMSG1 includes a RID and a DID, or includes the DID.

[0126] After receiving the first signaling, the A-IoT device can select a 2RAMSG1 time-frequency resource to send a 2RAMSG1 to the RD in response to the first signaling indicating the DID of the A-IoT device, or indicating the group to which the A-IoT device belongs, or indicating all devices.

[0127] In some embodiments, the 2RAMSG1 can include the RID and the DID, or the 2RAMSG1 can include the DID and not include the RID.

[0128] In some embodiments, the RID can be generated by the A-IoT device through a preset random number generation method, such as a pseudo-random number generator (PRNG), a true random number generator (TRNG), a hash function, etc.

[0129] S203, the RD sends a 2RAMSG2 to the A-IoT device, and the 2RAMSG2 includes the RID or the DID.

[0130] After receiving each A-IoT device, the RD can send a 2RAMSG2 to the A-IoT device that does not have a conflict, to indicate that the RD has successfully received the DID.

[0131] Exemplarily, if one time-frequency resource is selected by only one A-IoT device, i.e., the RD only receives one 2RAMSG1 on one time-frequency resource, the RD can determine that the A-IoT device collision has been resolved (the device is an A-IoT device without collision), and send a 2RAMSG2 to the A-IoT device without collision, the 2RAMSG2 including the RID or DID of the A-IoT device.

[0132] In some embodiments, if the 2RAMSG1 includes the DID and the RID, the 2RAMSG2 can include the DID or the RID; if the 2RAMSG1 includes the DID but not the RID, the 2RAMSG2 can include the RID.

[0133] It should be noted that, after receiving the 2RAMSG2 including the DID or the RID of the A-IoT device, the A-IoT device can determine that the RD has received the DID of the A-IoT device.

[0134] It should be noted that, one 2RAMSG2 can be for one A-IoT device or for multiple A-IoT devices, which is not limited herein. That is, one 2RAMSG2 can include the DID (or the RID) of one or more A-IoT devices.

[0135] The process of 3RA is introduced below.

[0136] Exemplarily, FIG. 3 shows a schematic diagram of a 3RA process according to some embodiments of the present application. As shown in FIG. 3, the process includes:

[0137] S301, the RD sends first signaling, the first signaling indicating a plurality of 3RAMSG1 time-frequency resources.

[0138] The RD can send the first signaling according to the business needs of the RD itself or a request (e.g., an inventory request) sent by other devices. The first signaling can indicate one or more time-frequency resources (3RAMSG1 time-frequency resources, i.e., first type of time-frequency resources) for transmitting 3RAMSG1.

[0139] In some embodiments, the first signaling can indicate the device identification or device grouping of the A-IoT devices that need to respond to the first signaling, or indicate that all devices need to respond to the first signaling.

[0140] The manner in which the first signaling indicates the 3RAMSG1 time-frequency resources will be introduced below, and is not described herein.

[0141] S302, the A-IoT device selects 3RAMSG1 time-frequency resources and sends a 3RAMSG1 to the RD through the selected 3RAMSG1 time-frequency resources, where the 3RAMSG1 includes the RID.

[0142] After receiving the first signaling, the A-IoT device can select 3RAMSG1 time-frequency resources to send a 3RAMSG1 to the RD in response to the first signaling indicating the DID of the A-IoT device, or indicating the group to which the A-IoT device belongs, or indicating all devices, where the 3RAMSG1 includes the RID.

[0143] S303, the RD sends a 3RAMSG2 to the A-IoT device, where the 3RAMSG2 includes the RID and indicates one or more 3RAMSG3 time-frequency resources.

[0144] The RD can send the 3RAMSG2 to the A-IoT device without a conflict to instruct the A-IoT device without a conflict to send the 3RAMSG3.

[0145] In some embodiments, the 3RAMSG2 can indicate time-frequency resources (3RAMSG3 time-frequency resources) for transmitting the 3RAMSG3 of each A-IoT device without a conflict. The manner in which the 3RAMSG2 indicates the 3RAMSG3 time-frequency resources will be described below, and will not be described here.

[0146] In some embodiments, the 3RAMSG3 time-frequency resources indicated by the 3RAMSG2 correspond one-to-one to the A-IoT devices without a conflict.

[0147] It should be noted that one 3RAMSG2 can be for one A-IoT device or for multiple A-IoT devices, which is not limited here. That is, one 3RAMSG2 can include the RID of one or more A-IoT devices.

[0148] In some embodiments, the 3RAMSG2 can also not indicate the 3RAMSG3 time-frequency resources.

[0149] S304, the A-IoT device sends a 3RAMSG3 to the RD based on the corresponding 3RAMSG3 time-frequency resources, where the 3RAMSG3 includes the DID.

[0150] The A-IoT device can send the 3RAMSG3 to the RD based on the corresponding 3RAMSG3 time-frequency resources in response to the received 3RAMSG2 including the RID sent by the A-IoT device (indicating that the conflict resolution is successful), where the 3RAMSG3 includes the DID.

[0151] In some embodiments, the 3RAMSG3 time-frequency resource can be a predefined time-frequency resource, instead of being indicated by the 3RAMSG2.

[0152] It should be noted that after sending the 3RAMSG3 to the RD, the 3RA procedure of the A-IoT device ends.

[0153] The technical solutions of the present application will be described below in combination with the 2RA procedure shown in FIG. 2 and the 3RA procedure shown in FIG. 3.

[0154] In some embodiments, the first signaling sent by the RD can simultaneously indicate the 3RAMSG1 time-frequency resource and the 2RAMSG1 time-frequency resource, and the 3RAMSG1 time-frequency resource can be later than the 2RAMSG1 time-frequency resource in the time domain. The A-IoT device receiving the first signaling can determine the random access mode (3RA or 2RA) to be adopted by itself based on whether the access power condition is met by itself, and select the time-frequency resource corresponding to the determined random access mode to send the 3RAMSG1 or the 2RAMSG1.

[0155] In some embodiments, the access power condition can include at least one of the following conditions: the A-IoT device is a type-1 A-IoT device; the remaining power of the A-IoT device is greater than a power threshold; the number of messages that can be transmitted by the remaining power of the A-IoT device is greater than a number threshold; the time length that can be maintained by the remaining power of the A-IoT device for the A-IoT device to transmit data is greater than a time length threshold; the remaining power of the A-IoT device is greater than or equal to the power required for the 3RA procedure. That is, the A-IoT device can determine to adopt 3RA or 2RA to perform random access with the RD based on the device type or the remaining power of itself.

[0156] In some embodiments, the power threshold, the number threshold, the time length threshold, and the power required for the 3RA procedure can be empirical values or preset values. They can also be passed to the A-IoT device by the RD through the first signaling or other messages, which are not limited herein.

[0157] For ease of description, the A-IoT device meeting the access power condition will be referred to as a 3RA A-IoT device, and the A-IoT device not meeting the access power condition will be referred to as a 2RA A-IoT device. It should be noted that for one A-IoT device, it can be a 3RA A-IoT device or a 2RA A-IoT device at different times according to the different states of itself.

[0158] Exemplarily, FIG. 4A shows an interaction flow diagram of a random access method in which the 3RAMSG1 time-frequency resource is after the 2RAMSG1 time-frequency resource in the time domain, according to some embodiments of the present application. As shown in FIG. 4A, the method includes the following steps:

[0159] S401: The RD sends a first signaling, the first signaling indicating at least one 2RA MSG1 time-frequency resource and at least one 3RA MSG1 time-frequency resource, wherein the 3RA MSG1 time-frequency resource is after the 2RA MSG1 time-frequency resource in time domain.

[0160] The RD can send the first signaling according to its own running logic or a request sent by other devices, and the first signaling can indicate at least one 2RA MSG1 time-frequency resource and at least one 3RA MSG1 time-frequency resource, wherein the 3RA MSG1 time-frequency resource is after the 2RA MSG1 time-frequency resource in time domain. That is, the transmission occasion corresponding to the 3RA MSG1 time-frequency resource is after the transmission occasion corresponding to the 2RA MSG1 time-frequency resource in time domain.

[0161] For example, referring to FIG. 4B, the 2RA MSG1 time-frequency resource indicated by the first signaling sent by the RD can include time-frequency resource 2RA1-1 and time-frequency resource 2RA1-2; and the 3RA MSG1 time-frequency resource indicated by the first signaling can include time-frequency resource 3RA1-1, time-frequency resource 3RA1-2, time-frequency resource 3RA1-3, and time-frequency resource 3RA1-4. Among them, in time domain, time-frequency resource 3RA1-1, time-frequency resource 3RA1-2, time-frequency resource 3RA1-3, and time-frequency resource 3RA1-4 are later than time-frequency resource 2RA1-1 and time-frequency resource 2RA1-2.

[0162] FIG. 4C shows a time domain and frequency domain division diagram of each time-frequency resource in FIG. 4B according to some embodiments of the present application. In FIG. 4C, df1 = df2 = df, and referring to FIG. 4C:

[0163] Time-frequency resource 2RA1-1 is a time-frequency resource from t0 to t0+dt1 in time domain and from f0 to f0+df1 in frequency domain;

[0164] Time-frequency resource 2RA1-2 is a time-frequency resource from t0 to t0+dt1 in time domain and from f0+of to f0+of+df1 in frequency domain;

[0165] Time-frequency resource 3RA1-1 is a time-frequency resource from t0+ot1 to t0+ot1+dt2 in time domain and from f0 to f0+df2 in frequency domain;

[0166] Time-frequency resource 3RA1-2 is a time-frequency resource from t0+ot1 to t0+ot1+dt2 in time domain and from f0+of to f0+of+df2 in frequency domain;

[0167] Time-frequency resource 3RA1-3 is a time-frequency resource from t0+ot1+ot2 to t0+ot1+ot2+dt2 in time domain and from f0 to f0+df2 in frequency domain;

[0168] The time-frequency resource 3RA1-4 is a time-frequency resource from t0+ot1+ot2 to t0+ot1+ot2+dt2 in the time domain and from f0+of to f0+of+df2 in the frequency domain.

[0169] It should be noted that the number of 2RA MSG1 time-frequency resources is 2 and the number of 3RA MSG1 time-frequency resources is 4 are only examples, and in other embodiments, they can also be any other values.

[0170] In some embodiments, the 3RA MSG1 time-frequency resources and the 2RA MSG1 time-frequency resources can be time-frequency resources with pre-defined preset resource parameters, and the first signaling can indicate the at least one 3RA MSG1 time-frequency resource and the at least one 2RA MSG1 time-frequency resource by indicating the number of 3RA MSG1 time-frequency resources and the number of 2RA MSG1 time-frequency resources. For example, the preset resource parameters can include the time domain size (duration), the frequency domain size (bandwidth), the starting time (time start) of the first time-frequency resource, the starting frequency (freq start) of the first time-frequency resource, the time domain offset (time offset) of the time domain adjacent time-frequency resource (or the time domain offset of each time-frequency resource relative to the first time-frequency resource), the frequency domain offset (freq offset) of the frequency domain adjacent time-frequency resource (or the frequency domain offset of each time-frequency resource relative to the first time-frequency resource), and the order of different types of time-frequency resources.

[0171] In some embodiments, the time domain size can be the time length, the number of slots (also referred to as slots), the number of chips, etc. The frequency domain size can be the bandwidth, the resource element (RE), the resource block (RB), etc.

[0172] Based on this, the first signaling can indicate the at least one 2RA MSG1 time-frequency resource and the at least one 3RA MSG1 time-frequency resource by indicating the number (Q) of different types of time-frequency resources. For example, the first signaling can include Q1 and Q2, where Q1 indicates that the number of 2RA MSG1 time-frequency resources is 2 Q1 , and Q2 indicates that the number of 3RA MSG1 time-frequency resources is 2 Q2For example, for the case shown in FIG. 4B, Q1 is 1 (indicating time-frequency resource 2RA1-1 and time-frequency resource 2RA1-2), and Q2 is 2 (time-frequency resource 3RA1-1, time-frequency resource 3RA1-2, time-frequency resource 3RA1-3, and time-frequency resource 3RA1-4). The manner of indicating the 2RAMSG1 time-frequency resources and / or the 3RAMSG1 time-frequency resources by the number of pre-defined 2RAMSG1 time-frequency resources and / or 3RAMSG1 time-frequency resources is referred to as a first indication manner.

[0173] In some embodiments, the first indication manner can also indicate the order of the 2RAMSG1 time-frequency resources and the 3RAMSG1 time-frequency resources in the first signaling, to indicate the order in which the at least one 2RAMSG1 time-frequency resource and the at least one 3RAMSG1 time-frequency resource are arranged. For example, if the order is 2RAMSG1 time-frequency resources first and 3RAMSG1 time-frequency resources second, the first signaling indication can be {Q1, Q2}; if the order is 3RAMSG1 time-frequency resources first and 2RAMSG1 time-frequency resources second, the first signaling indication can be {Q2, Q1}.

[0174] Based on the time-frequency resources shown in FIG. 4C, if t0, f0, dt1, df1, ot1, of, dt2, df2, ot2, and the order of the time-frequency resources (2RAMSG1 time-frequency resources first and 3RAMSG1 time-frequency resources second) are pre-defined, the first signaling can indicate the aforementioned time-frequency resources 2RA1-1, 2RA1-2, 3RA1-1, 3RA1-2, 3RA1-3, and 3RA1-4 by {Q1=1, Q2=2}.

[0175] In some embodiments, the first signaling can indicate the 2RAM SGI time-frequency resources by the number of 2RAM SGI time-frequency resources, the start time (timestart) and the start frequency (freqstart) of the first 2RAM SGI time-frequency resource, the time-domain size (duration) and the frequency-domain size (bandwidth) of the 2RAM SGI time-frequency resource, and the time-domain offset (timeoffset) and the frequency-domain offset (freqoffset) of each other 2RAM SGI time-frequency resource relative to the first 2RAM SGI time-frequency resource. Accordingly, the first signaling can also indicate the 3RAM SGI time-frequency resources by sending the number of 3RAM SGI time-frequency resources, the start time (timestart) and the start frequency (freqstart) of the first 3RAM SGI time-frequency resource, the time-domain size (duration) and the frequency-domain size (bandwidth) of the 3RAM SGI time-frequency resource, and the time-domain offset (timeoffset) and the frequency-domain offset (freqoffset) of each other 3RAM SGI time-frequency resource relative to the first 3RAM SGI time-frequency resource. Hereinafter, the way of indicating the 2RAM SGI time-frequency resources and / or the 3RAM SGI time-frequency resources by the number of time-frequency resources, the start time and the start frequency of the first time-frequency resource, the time-domain size and the frequency-domain size of the time-frequency resource, and the time-domain offset and the frequency-domain offset of other time-frequency resources relative to the first time-frequency resource is referred to as the second indication manner.

[0176] Exemplarily, the first signaling of the second indication manner can indicate the 2RAM SGI time-frequency resources or the 3RAM SGI time-frequency resources by the fields such as resource set {type, Q, {timestart, duration, freqstart, bandwidth}, {timeoffset, freqoffset}... {timeoffset, freqoffset}}. Among them, the type field is used to indicate whether the time-frequency resource is a 3RAM SGI resource or a 2RAM SGI resource, and Q is used to indicate the number of time-frequency resources (for example, the number is 2 Q , or other calculation methods (for example, Q, multiple of Q, etc.).

[0177] Assuming that type = 1 (which can also be other values) indicates 2RAM SGI time-frequency resources, and type = 0 (which can also be other values) indicates 3RAM SGI time-frequency resources, the first signaling based on the above-mentioned second indication manner can be indicated by the resource set {1, Q1, {timestart, duration, freqstart, bandwidth}, (2 Q1- 1) {timeoffset, freqoffset} to indicate the at least one 2RA MSG1 time-frequency resource, and by the resource set {0, Q2, {timestart, duration, freqstart, bandwidth}, (2 Q2 - 1) {timeoffset, freqoffset} to indicate the at least one 3RA MSG1 time-frequency resource. For example, for the case shown in FIG. 4B and FIG. 4C, the time-frequency resource 2RA1-1, the time-frequency resource 2RA1-2 can be indicated by the time-frequency resource set {1, 1, {t0, dt1, f0, df1}, {0, of}}, the time-frequency resource 3RA1-1, the time-frequency resource 3RA1-2, the time-frequency resource 3RA1-3 and the time-frequency resource 3RA1-4 can be indicated by the resource set {0, 2, {t0+ot1, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}}.

[0178] It should be noted that, based on the first signaling of the above-mentioned second indication mode, the resource set for indicating the 2RA MSG1 time-frequency resource and the resource set for indicating the 3RA MSG1 time-frequency resource can also be combined into one resource set. For example, the first signaling can be indicated by the resource set {type = 1, Q1, {timestart, duration, freqstart, bandwidth}, (2 Q1 - 1) {timeoffset, freqoffset}, type = 0, Q2, {timestart, duration, freqstart, bandwidth}, (2 Q2 - 1) {timeoffset, freqoffset} to indicate the at least one 2RA MSG1 time-frequency resource and the at least one 3RA MSG1 time-frequency resource. For example, for the case shown in FIG. 4B and FIG. 4C, the aforementioned time-frequency resource 2RA1-1, the time-frequency resource 2RA1-2, the time-frequency resource 3RA1-1, the time-frequency resource 3RA1-2, the time-frequency resource 3RA1-3 and the time-frequency resource 3RA1-4 can be indicated by the time-frequency resource set {1, 1, {t0, dt1, f0, df1}, {0, of}, 0, 2, {t0+ot1, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}}.

[0179] In some embodiments, the order of 2RAMSG1 and 3RAMSG1 time-frequency resources in the time-frequency resource set can also be predefined, thus eliminating the need to configure the type field in the first signaling based on the second indication method described above. For example, the first set of quantity (Q), resource parameters (start time, time domain size, start frequency, frequency domain size), time domain offset, and frequency domain offset correspond to one type (e.g., 2RAMSG1 or 3RAMSG1) of time-frequency resources; while the second set of quantity, resource parameters (start time, time domain size, start frequency, frequency domain size), time domain offset, and frequency domain offset correspond to another type (e.g., 3RAMSG1 or 2RAMSG1) of time-frequency resources. Based on this, the above {type = 1, Q1, {timestart, duration, freqstart, bandwidth}, (2 Q1 -1) {timeoffset, freqoffset}, type=0, Q2, {timestart, duration, freqstart, bandwidth}, (2 Q2 -1) {timeoffset, freqoffset} can be simplified to {Q1, {timestart, duration, freqstart, bandwidth}, (2) Q1 -1) {timeoffset, freqoffset}, Q2, {timestart, duration, freqstart, bandwidth}, (2 Q2 -1) {timeoffset, freqoffset}}. For example, the aforementioned time-frequency resource set {1, 1, {t0, dt1, f0, df1}, {0, of}, 0, 2, {t0+ot1, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}} can be simplified to the time-frequency resource set {1, {t0, dt1, f0, df1}, {0, of}, 2, {t0+ot1, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}}. This reduces the amount of data in the first signaling instruction.

[0180] It should be noted that the order of the fields in the above examples can be adjusted, and the contents of the fields can be merged; no restrictions are imposed here.

[0181] In some embodiments, the first signaling can also indicate the at least one 3RAMSG1 time-frequency resource and the at least one 2RAMSG1 time-frequency resource in a manner of indicating a starting time, a starting frequency, a time domain size, and a frequency domain size of each time-frequency resource. Hereinafter, the manner of listing the starting time, the starting frequency, the time domain size, and the frequency domain size of each time-frequency resource in the first signaling is referred to as a third indication manner.

[0182] Exemplarily, the first signaling based on the third indication manner can indicate one time-frequency resource set, and Q1 indicating a number of 2RAMSG1 time-frequency resources in the time-frequency resource set, and Q2 indicating a number of 3RAMSG1 time-frequency resources, wherein the time-frequency resource set can include the starting time, the time domain size, the starting frequency, and the frequency domain size of each time-frequency resource. For example, the first signaling can include the following content: {Q1, Q2, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}}, wherein Q2 is followed by 2 Q1 +2 Q2 {timestart, duration, freqstart, bandwidth}. The above content can indicate that there are 2 Q1 RAMSG1 time-frequency resources and 2 Q2 RAMSG1 time-frequency resources in the number of 3RAMSG1 time-frequency resources and the number of 2RAMSG1 time-frequency resources after Q1, Q2. For example, for the cases shown in FIGS. 4B and 4C, the time-frequency resource set indicated in the first signaling can be {1, 2, {t0, dt1, f0, df1}, {t0, dt1, f0+of, df1}, {t0+ot1, dt2, f0, df2}, {t0+ot1, dt2, f0+of, df2}, {t0+ot1+ot2, dt2, f0, df2}, {t0+ot1+ot2, dt2, f0+of, df2}}.

[0183] In some other embodiments, the time-frequency resource set in the first signaling based on the third indication manner can also be {Q1, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}, Q2, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}}. For example, the first signaling can include the following content: {1, {t0, dt1, f0, df1}, {t0, dt1, f0+of, df1}, {t0+ot1, dt2, f0, df2}, {t0+ot1, dt2, f0+of, df2}, {t0+ot1+ot2, dt2, f0, df2}, {t0+ot1+ot2, dt2, f0+of, df2}, 2, {t0, dt1, f0, df1}, {t0, dt1, f0+of, df1}, {t0+ot1, dt2, f0, df2}, {t0+ot1, dt2, f0+of, df2}, {t0+ot1+ot2, dt2, f0, df2}, {t0+ot1+ot2, dt2, f0+of, df2}}. Q1two {timestart, duration, freqstart, bandwidth} after Q1 Q2 two {timestart, duration, freqstart, bandwidth} after Q1 Q1 two 2RAMSG1 time-frequency resources after Q2 Q2 three 3RAMSG1 time-frequency resources after Q2. For example, for the case shown in FIG. 4B and FIG. 4C, the set of time-frequency resources indicated in the first signaling can be {1, {t0, dt1, f0, df1}, {t0, dt1, f0+of, df1}, 2, {t0+ot1, dt2, f0, df2}, {t0+ot1, dt2, f0+of, df2}, {t0+ot1+ot2, dt2, f0, df2}, {t0+ot1+ot2, dt2, f0+of, df2}}.

[0184] For another example, based on the third indication manner, two sets of time-frequency resources (e.g. two lists, two fields, etc.) can be indicated in the first signaling, one set of time-frequency resources corresponding to one type of time-frequency resources, and the other set of time-frequency resources corresponding to another type of time-frequency resources. The start time, start frequency, time domain size, and frequency domain size of the at least one 3RAMSG1 time-frequency resource can be configured in one set of time-frequency resources, and the start time, start frequency, time domain size, and frequency domain size of the at least one 2RAMSG1 time-frequency resource can be configured in the other set of time-frequency resources. Illustratively, one set of time-frequency resources can include two {timestart, duration, freqstart, bandwidth}, indicating the start time, start frequency, time domain size, and frequency domain size of two 2RAMSG1 time-frequency resources respectively; and the other set of time-frequency resources can include two {timestart, duration, freqstart, bandwidth}, indicating the start time, start frequency, time domain size, and frequency domain size of two 2RAMSG1 time-frequency resources respectively. Q1 two {timestart, duration, freqstart, bandwidth} after Q1 Q1 two {timestart, duration, freqstart, bandwidth} after Q1 Q2 two {timestart, duration, freqstart, bandwidth} after Q1 Q2For the case of FIG. 4B and FIG. 4C, the time-frequency resource set indicating time-frequency resource 2RA1-1, time-frequency resource 2RA1-2 can be { {t0, dt1, f0, df1}, {t0, dt1, f0+of, df1}}; the time-frequency resource set indicating time-frequency resource 3RA1-1, time-frequency resource 3RA1-2, time-frequency resource 3RA1-3 and time-frequency resource 3RA1-4 can be represented as { {t0+ot1, dt2, f0, df1}, {t0+ot1, dt2, f0+of, df2}, {t0+ot1+ot2, dt2, f0, df2}, {t0+ot1+ot2, dt2, f0+of, df2}}.

[0185] For example, in the first signaling, two time-frequency resource sets (e.g. two lists, two fields, etc.) can be indicated, one time-frequency resource set corresponding to one type of time-frequency resource. In each time-frequency resource set, the type of time-frequency resource corresponding to the time-frequency resource set can be indicated by a type field. The resource set {type=1, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}} can include the start time, start frequency, time domain size, and frequency domain size corresponding to two 2RAMSG1 time-frequency resources respectively; the resource set {type=0, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}} can include the start time, start frequency, time domain size, and frequency domain size corresponding to two 3RAMSG1 time-frequency resources respectively. Q1 For example, in the first signaling, two time-frequency resource sets (e.g. two lists, two fields, etc.) can be indicated, one time-frequency resource set corresponding to one type of time-frequency resource. In each time-frequency resource set, the type of time-frequency resource corresponding to the time-frequency resource set can be indicated by a type field. The resource set {type=1, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}} can include the start time, start frequency, time domain size, and frequency domain size corresponding to two 2RAMSG1 time-frequency resources respectively; the resource set {type=0, {timestart, duration, freqstart, bandwidth}, …, {timestart, duration, freqstart, bandwidth}} can include the start time, start frequency, time domain size, and frequency domain size corresponding to two 3RAMSG1 time-frequency resources respectively. Q2 For the case of FIG. 4B and FIG. 4C, the time-frequency resource set indicating time-frequency resource 2RA1-1, time-frequency resource 2RA1-2 can be { {t0, dt1, f0, df1}, {t0, dt1, f0+of, df1}}; the time-frequency resource set indicating time-frequency resource 3RA1-1, time-frequency resource 3RA1-2, time-frequency resource 3RA1-3 and time-frequency resource 3RA1-4 can be represented as { {t0+ot1, dt2, f0, df1}, {t0+ot1, dt2, f0+of, df2}, {t0+ot1+ot2, dt2, f0, df2}, {t0+ot1+ot2, dt2, f0+of, df2}}.

[0186] It should be noted that in other embodiments, the first signaling can also indicate the 3RAM SG1 time-frequency resource and the 2RAM SG1 time-frequency resource in other manners, which are not limited herein.

[0187] In some embodiments, the RD can embed the information (hereinafter referred to as time-frequency resource indication information, for example, information corresponding to the first indication manner, the second indication manner, and the third indication manner) indicating the at least one 2RAM SG1 time-frequency resource and the 3RAM SG1 time-frequency resource into a layer 1 (for example, a physical layer (PH)) control (layer 1 control, referred to as L1 control) or a high layer signaling manner, and transmit the time-frequency resource indication information to the A-IoT device through a physical reader-device channel (PRDCH) (a physical channel used by the RD to transmit data to the A-IoT device).

[0188] In some embodiments, after receiving the high layer signaling of the high layer (for example, a media access control (MAC) layer, an A-IoT layer (a new layer defined for A-IoT), a non-access (NAS) layer, an application layer, etc.), the physical layer of the RD can encapsulate the high layer signaling in a physical layer data (physical data) field, add a header field in front of the physical layer data field, add a check code (for example, a cyclic redundancy check code (CRC)) field after the physical layer data field, and then send the header field, the physical layer data field, and the CRC field to the A-IoT device through the PRDCH. Based on this, the time-frequency resource indication information can be embedded in the header field for transmission.

[0189] For example, the RD can split the time-frequency resource indication information into one or more control packets to indicate different contents. One control packet can include a control filed field and a control content field. Exemplarily, Table 1 shows an example of the content in a control packet.

[0190] Table 1

[0191] As shown in Table 1, the control field of the control packet can include 3 bits, which are used to indicate the control type of the control packet, for example, 001 indicates that the control packet is used to indicate the allocation of time domain resources, 010 indicates that the control packet is used to indicate the allocation of frequency domain resources, 011 indicates that the control packet is used to indicate the number of resources, and 100 indicates that the control packet is used to indicate the A-IoT device state. The control content field is used to indicate the specific content that the control packet needs to indicate, for example, the aforementioned time-frequency resource indication information. Wherein, when the control field of the control packet is 001, 010, 011, and 100, the number of bits of the control content field is X bits, Y bits, Z bits, and U bits respectively, and X, Y, Z, and U can be the same or different.

[0192] Exemplarily, when the control field is 001, the control content field can include the start time, time domain size, and time domain offset of the time-frequency resource, the type (for example, the aforementioned type field, etc.), number, and order of the time-frequency resource, etc.; when the control field is 010, the control content field can include the start frequency, frequency domain size, and frequency domain offset of the time-frequency resource, the type (for example, the aforementioned type field, etc.), number, and order of the time-frequency resource, etc.

[0193] It should be noted that when the control field of the control packet is 100, the control packet can be used to indicate the A-IoT device to keep or switch state (for example, sleep, work, or off) (the content of the control packet can be referred to as state switching indication).

[0194] In some embodiments, the control field is optional, for example, in the case of a predefined correspondence between the data in the header field and the control field, the control field can not be included in the control packet.

[0195] It should be noted that in some other embodiments, the control packet can include more fields, which are not limited herein.

[0196] In some embodiments, the time-frequency resource indication information can be transmitted through one or more control packets.

[0197] For example, FIG. 5A shows a schematic diagram of adding a control packet to the physical layer data field for transmission according to some embodiments of the present application.

[0198] As shown in FIG. 5A, after receiving the RD to device clock acquisition signal (used to indicate the start of the reader to device (R2D) transmission) (reader to device timing acquisition signal, R2DTAS), the RD can first transmit N (N is a positive integer greater than or equal to 1) control packets in the physical layer data packet header, then transmit the physical layer data field of the physical layer data packet, and finally transmit the check code field of the physical layer data packet.

[0199] In some embodiments, the R2DTAS can include a start-indicator part and a clock-acquisition part.

[0200] In some embodiments, the R2DTAS signal can also be referred to as an R2D preamble.

[0201] In some embodiments, the RD can first transmit N (N is a positive integer greater than or equal to 1) control packets in the header of the physical layer data packet via the PRDCH, and then transmit the control packet check code corresponding to the N control packets (optional), and then transmit the physical layer data field of the physical layer data packet, and finally transmit the check code field of the physical layer data packet.

[0202] In some embodiments, the time-frequency resource indication information can also be embedded in high layer signaling, such as a control element (MAC CE for short) of the MAC layer. In this way, as shown in FIG. 5B, the RD can embed the high layer data including the time-frequency resource indication information into the physical layer data field of the physical layer data packet after the R2DTAS, and transmit it to the A-IoT device via the PRDCH.

[0203] In some embodiments, the first signaling can be any signaling, including but not limited to a paging message, a repaging message, a slot start message, an occasion start message, a query, a query rep message, a round start message, etc.

[0204] In some embodiments, the first signaling can indicate the device identifier or device group of the A-IoT device that needs to respond to the first signaling, or can also indicate that all devices that receive the first signaling need to respond to the first signaling.

[0205] In some embodiments, the first signaling can further include at least one of the following parameters in the aforementioned access power condition: a power threshold, a number threshold, a time threshold, and a power required for the 3RA procedure.

[0206] In some embodiments, the first signaling can further include an inventory identifier.

[0207] S402A, the 2RA A-IoT device selects 2RA MSG1 time-frequency resource in response to not satisfying the access power condition, and sends 2RA MSG1 to the RD based on the selected 2RA MSG1 time-frequency resource.

[0208] After receiving the first signaling, the 2RA A-IoT device can determine to access the RD by 2RA in response to not satisfying the access power condition by itself, and select one (or multiple) 2RA MSG1 time-frequency resource from the at least one 2RA MSG1 time-frequency resource indicated by the first signaling. When the transmission occasion of the selected 2RA MSG1 time-frequency resource arrives, the 2RA A-IoT device can send 2RA MSG1 to the RD through the 2RA MSG1 time-frequency resource.

[0209] It should be noted that the 2RA MSG1 time-frequency resource selected by different 2RA A-IoT devices can be the same or can not be the same. If multiple 2RA A-IoT devices select the same 2RA MSG1 time-frequency resource, the multiple 2RA A-IoT devices need to compete for the same 2RA MSG1 time-frequency resource, and there is a conflict.

[0210] Exemplarily, referring to FIG. 4B, the 2RA A-IoT device can select time-frequency resource 2RA1-1 or time-frequency resource 2RA1-2 to send 2RA MSG1. If two 2RA A-IoT devices both select time-frequency resource 2RA1-1 or time-frequency resource 2RA1-2, the two 2RA A-IoT devices have a conflict.

[0211] In some embodiments, the 2RA MSG1 can include the DID of the 2RA A-IoT device, or include the DID of the 2RA A-IoT device and the RID generated by the 2RA A-IoT device.

[0212] In some embodiments, when starting to respond to a first signaling, the 2RA A-IoT device can maintain the processing state of the first signaling (for example, record the identification (for example, inventor identifier) of the first signaling, processing progress). For example, when sending 2RA MSG1, the 2RA A-IoT device can configure the processing progress as being processed (for example, 0); when receiving 2RA MSG2, configure the processing progress as processing completed (for example, 1). After the 2RA process for a first signaling is completed, the 2RA A-IoT device can also clear the processing state for the first signaling.

[0213] S402B, the 3RA A-IoT device waits for access.

[0214] 3RA A-IoT device can wait for access before the transmission occasion of 3RA MSG1 time-frequency resource of 3RA MSG1 arrives. Step S402B is optional.

[0215] S403, the 3RA A-IoT device selects 3RA MSG1 time-frequency resource in response to meeting the access power condition, and sends 3RA MSG1 to the RD based on the selected 3RA MSG1 time-frequency resource.

[0216] After receiving the first signaling, the 3RA A-IoT device can determine to access the RD by 3RA in response to meeting the access power condition by itself, and select one (or multiple) 3RA MSG1 time-frequency resource from the at least one 3RA MSG1 time-frequency resource indicated by the first signaling. When the transmission occasion of the selected 3RA MSG1 time-frequency resource arrives, the 3RA A-IoT device can send 3RA MSG1 to the RD through the 3RA MSG1 time-frequency resource.

[0217] It should be noted that the 3RA MSG1 time-frequency resource selected by different 3RA A-IoT devices can be the same or can not be the same. If multiple 3RA A-IoT devices select the same 3RA MSG1 time-frequency resource, the multiple 3RA A-IoT devices need to compete for the same 3RA MSG1 time-frequency resource, and there is a conflict.

[0218] Exemplarily, referring to FIG. 4B, the 3RA A-IoT device can select any one of time-frequency resource 3RA1-1, time-frequency resource 3RA1-2, time-frequency resource 3RA1-3, and time-frequency resource 3RA1-4 to send 3RA MSG1. If multiple 3RA A-IoT devices all select time-frequency resource 3RA1-1 or time-frequency resource 3RA1-2 or time-frequency resource 3RA1-3 or time-frequency resource 3RA1-4, the multiple 3RA A-IoT devices exist conflict.

[0219] In some embodiments, the 3RA MSG1 can include the RID generated by the 3RA A-IoT device.

[0220] In some embodiments, the 3RA A-IoT device can maintain a processing status (e.g., record the identification (e.g., inventor identifier) of the first signaling, processing progress) of the first signaling when starting to respond to the first signaling. For example, when sending the 3RA MSG1, the 2RA A-IoT device can configure the processing progress to start processing (e.g., 00); when receiving the 3RA MSG2, configure the processing progress to processing in progress (e.g., 01); when sending the 3RA MSG3, configure the processing progress to processing complete (e.g., 11). After the 3RA process for a first signaling is completed, the 3RA A-IoT device can also clear the processing status for the first signaling.

[0221] S404, the RD sends the 2RA MSG2 and the 3RA MSG2 in response to the 2RA MSG1 and the 3RA MSG1, wherein the 3RA MSG2 indicates the 3RA MSG3 time-frequency resource corresponding to the non-conflicting 3RA A-IoT device.

[0222] After receiving the 2RA MSG1 and the 3RA MSG1 transmitted through the respective time-frequency resources, the RD can determine the non-conflicting 3RA A-IoT device and the non-conflicting 2RA A-IoT device. If only one 2RA A-IoT device sends the 2RA MSG1 through a 2RA MSG1 time-frequency resource, the one 2RA device is the non-conflicting 2RA A-IoT device; if only one 3RA A-IoT device sends the 3RA MSG1 through a 3RA MSG1 time-frequency resource, the one 3RA device can be the non-conflicting 3RA A-IoT device. Then, the RD can send the 3RA MSG2 for the non-conflicting 3RA A-IoT device, and the 2RA MSG2 for the non-conflicting 2RA A-IoT device.

[0223] For example, referring to FIG. 4B, after receiving the 2RA MSG1 and the 3RA MSG1, the RD can send the 2RA MSG2 and the 3RA MSG2 at T0.

[0224] In some embodiments, the 3RA MSG2 indicating the 3RA MSG3 time-frequency resource corresponding to the non-conflicting 3RA A-IoT device can be one-to-one corresponding to the non-conflicting 3RA A-IoT device.

[0225] In some embodiments, the MSG3 time-frequency resource can be associated with the DID or the RID of the 3RA A-IoT device, so that the 3RA A-IoT device can obtain the MSG3 time-frequency resource corresponding to itself based on the DID or the RID.

[0226] In some embodiments, if the DID is included in the 2RA MSG1 of one 2RA A-IoT device and the RID is not included, the 2RA MSG2 can include the DID of the 2RA A-IoT device.

[0227] In some embodiments, the 2RA MSG2 can further include a state switching indication to instruct the 2RA A-IoT device to switch to a sleep state or a shutdown state after receiving the 2RA MSG2.

[0228] In some embodiments, the 3RA MSG2 can further include a state switching indication to instruct the 3RA A-IoT device to switch to a sleep state or a shutdown state after sending the 3RA MSG3.

[0229] It should be noted that in the case where there are multiple 3RA A-IoT devices without conflicts, the RD can transmit the 3RA MSG2 to the multiple 3RA A-IoT devices through one 3RA MSG2 or through multiple 3RA MSG2s respectively.

[0230] It should be noted that in the case where there are multiple 2RA A-IoT devices without conflicts, the RD can transmit the 2RA MSG2 to the multiple 2RA A-IoT devices through one 2RA MSG2 or through multiple 2RA MSG2s respectively.

[0231] In some embodiments, the time-frequency resource of the 3RA MSG3 can also be predefined, and thus the 3RA MSG2 can not indicate the time-frequency resource of the 3RA MSG3, which is not limited herein.

[0232] In some embodiments, the 3RAMSG2 indicates the 3RAMSG3 time-frequency resource manner can be the aforementioned first indication manner (indicating the number of 3RAMSG3 time-frequency resources), the aforementioned second indication manner (indicating the number / time domain size / frequency domain size of 3RAMSG3 time-frequency resources, the starting time / starting frequency of the first 3RAMSG3 time-frequency resource, and the frequency domain offset and time domain offset of other 3RAMSG3 time-frequency resources relative to the first 3RAMSG3 time-frequency resource), the aforementioned third indication manner (indicating the starting time, starting frequency, time domain size, and frequency domain size of each 3RAMSG3 time-frequency resource), or other indication manners. For details, reference can be made to the aforementioned step S401, which will not be described here. In some embodiments, the time-frequency resource indication information indicating the 3RAMSG3 time-frequency resource can be transmitted in the manner of L1 control and high-layer signaling. For details, reference can be made to the aforementioned step S401, which will not be described here.

[0233] S405A, the 2RA A-IoT device sleeps or is turned off.

[0234] In the case where the 2RA A-IoT device receives the 2RAMSG2 including the DID of itself or the RID sent to the RD, the 2RA A-IoT device can switch to the sleep or off state in response to the 2RAMSG2, so as to charge the 2RA A-IoT device.

[0235] In some embodiments, S405A is optional.

[0236] For example, referring to FIG. 4B, after the 2RA A-IoT device receives the 2RAMSG2 at T0, the 2RA A-IoT device can switch to the sleep or off state, so as to charge the 2RA A-IoT device.

[0237] It should be noted that the 2RA A-IoT device can automatically switch to the sleep or off state after receiving the 2RAMSG2, or switch to the sleep or off state in response to the state switching indication in the 2RAMSG2.

[0238] S405B, the 3RA A-IoT device sends the 3RAMSG3 based on the corresponding 3RAMSG3 time-frequency resource in response to the 3RAMSG2.

[0239] In the case where the 3RA A-IoT device receives the 3RAMSG2 including the RID sent to the RD by the 3RA A-IoT device, the 3RA A-IoT device can send the 3RAMSG3 to the RD based on the 3RAMSG3 time-frequency resource indicated by the 3RAMSG2 in response to the 3RAMSG2, and the 3RAMSG3 includes the DID of the 3RA A-IoT device.

[0240] For example, referring to FIG. 4B, after the 3RA A-IoT device receives the 3RAMSG2 at the T0 moment, the 3RA A-IoT device transmits the 3RAMSG3 based on the 3RAMSG3 time-frequency resource corresponding to itself.

[0241] S406, the 3RA A-IoT device sleeps or is turned off.

[0242] After the 3RA A-IoT device transmits the 3RAMSG3 to the RD, the random access is completed, and the 3RA A-IoT device enters a sleep or turned-off state.

[0243] It should be noted that step S406 is optional, that is, after the 3RA A-IoT device transmits the 3RAMSG3 to the RD, the 3RA A-IoT device can also remain in a working state, which is not limited herein.

[0244] It should be noted that after the 3RA A-IoT device transmits the 3RAMSG3, the 3RA A-IoT device can automatically switch to a sleep or turned-off state, or switch to a sleep or turned-off state in response to a state switching indication in the 3RAMSG2.

[0245] Based on the above method, the RD can indicate the 2RAMSG1 time-frequency resource and the 3RAMSG1 time-frequency resource in the first signaling, so that the A-IoT device can select a corresponding random access manner based on whether the A-IoT device meets the access power condition to perform random access with the RD based on the corresponding time-frequency resource.

[0246] In some other embodiments, the 2RAMSG1 time-frequency resource in the first signaling is after the 3RAMSG1 time-frequency resource in the time domain.

[0247] For example, FIG. 6A shows an interaction flow diagram of a random access method in which the 2RAMSG1 time-frequency resource is after the 3RAMSG1 time-frequency resource in the time domain, according to some embodiments of the present application; and FIG. 6B shows a process diagram of a random access method in which the 2RAMSG1 time-frequency resource is after the 3RAMSG1 time-frequency resource in the time domain, according to some embodiments of the present application. As shown in FIG. 6A, the method includes the following steps:

[0248] S601: The RD transmits first signaling, and the first signaling indicates at least one 2RAMSG1 time-frequency resource and at least one 3RAMSG1 time-frequency resource, wherein the 2RAMSG1 time-frequency resource is after the 3RAMSG1 time-frequency resource in the time domain.

[0249] The RD can transmit the first signaling according to the running logic of itself or a request transmitted by other devices, and the first signaling can indicate at least one 2RAMSG1 time-frequency resource and at least one 2RAMSG1 time-frequency resource, wherein the 3RAMSG1 time-frequency resource is after the 3RAMSG1 time-frequency resource in the time domain.

[0250] For example, referring to FIG. 6B, the 2RA MSG1 time-frequency resources indicated by the first signaling sent by the RD can include time-frequency resource 2RA1-1' and time-frequency resource 2RA1-2'; the 3RA MSG1 time-frequency resources indicated by the first signaling can include time-frequency resource 3RA1-1', time-frequency resource 3RA1-2', time-frequency resource 3RA1-3', and time-frequency resource 3RA1-4'. Among them, in the time domain, time-frequency resource 3RA1-1', time-frequency resource 3RA1-2', time-frequency resource 3RA1-3', and time-frequency resource 3RA1-4' are before time-frequency resource 2RA1-1' and time-frequency resource 2RA1-2'.

[0251] FIG. 6C shows a time domain and frequency domain division of each time-frequency resource in FIG. 6B, according to some embodiments of the present application. In FIG. 6C, df1 = df2 = df, referring to FIG. 6C:

[0252] Time-frequency resource 3RA1-1' is a time-frequency resource from t0 to t0+dt2 in the time domain and from f0 to f0+df2 in the frequency domain;

[0253] Time-frequency resource 3RA1-2' is a time-frequency resource from t0 to t0+dt2 in the time domain and from f0+of to f0+of+df2 in the frequency domain;

[0254] Time-frequency resource 3RA1-3' is a time-frequency resource from t0+ot2 to t0+ot2+dt2 in the time domain and from f0 to f0+df2 in the frequency domain;

[0255] Time-frequency resource 3RA1-4' is a time-frequency resource from t0+ot2 to t0+ot2+dt2 in the time domain and from f0+of to f0+of+df2 in the frequency domain;

[0256] Time-frequency resource 2RA1-1' is a time-frequency resource from t0+2ot2 to t0+2ot2+dt1 in the time domain and from f0 to f0+df1 in the frequency domain;

[0257] Time-frequency resource 2RA1-2' is a time-frequency resource from t0+2ot2 to t0+2ot2+dt1 in the time domain and from f0+of to f0+of+df1 in the frequency domain.

[0258] In some embodiments, the 3RAMSG1 time-frequency resources and the 2RAMSG1 time-frequency resources can be time-frequency resources with predefined preset resource parameters, and the first signaling can indicate the at least one 3RAMSG1 time-frequency resource and the at least one 2RAMSG1 time-frequency resource in a manner of indicating the number Q2 of 3RAMSG1 time-frequency resources and the number Q1 of 2RAMSG1 time-frequency resources through the aforementioned first indication manner. For example, for the case shown in FIG. 6B, if t0, f0, dt1, df1, ot1, of, dt2, df2, ot2, the order of time-frequency resources (3RAMSG1 time-frequency resources first and then 2RAMSG1 time-frequency resources) is predefined, the aforementioned time-frequency resource 2RA1-1', time-frequency resource 2RA1-2', time-frequency resource 3RA1-1', time-frequency resource 3RA1-2', time-frequency resource 3RA1-3', and time-frequency resource 3RA1-4' can be indicated in the first signaling in a manner of {Q2=2, Q2=1}.

[0259] In some embodiments, the first signaling can also indicate the at least one 3RAMSG1 time-frequency resource and the at least one 2RAMSG1 time-frequency resource in the aforementioned second indication manner.

[0260] For example, assuming that type=1 (or other values) indicates 2RAMSG1 time-frequency resources, and type=0 (or other values) indicates 3RAMSG1 time-frequency resources, the first signaling based on the aforementioned second indication manner can indicate 2 Q1 RAMSG1 time-frequency resources through a resource set {1, Q1, {timestart, duration, freqstart, bandwidth}, (2 Q1 -1) {timeoffset, freqoffset}} and indicate 2 Q2 RAMSG1 time-frequency resources through a resource set {0, Q2, {timestart, duration, freqstart, bandwidth}, (2 Q2 -1) {timeoffset, freqoffset}}. For example, for the cases shown in FIG. 6B and FIG. 6C, the time-frequency resource 3RA1-1', time-frequency resource 3RA1-2', time-frequency resource 3RA1-3', and time-frequency resource 3RA1-4' can be indicated through a resource set {0, 2, {t0, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}}; and the time-frequency resource 2RA1-1', time-frequency resource 2RA1-2' can be indicated through a resource set {1, 1, {t0+2ot2, dt1, f0, df1}, {0, of}}.

[0261] It should be noted that the resource set indicating 2RAMSG1 time-frequency resources and the resource set indicating 3RAMSG1 time-frequency resources can also be combined into one resource set. For example, for the case shown in FIG. 6B and FIG. 6C, the aforementioned time-frequency resource 3RA1-1', time-frequency resource 3RA1-2', time-frequency resource 3RA1-3', time-frequency resource 3RA1-4', time-frequency resource 2RA1-1' and time-frequency resource 2RA1-2' can be indicated by the time-frequency resource set {0, 2, {t0, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}, 1, 1, {t0+2ot2, dt1, f0, df1}, {0, of}}.

[0262] In some embodiments, the order of 2RAMSG1 time-frequency resources and 3RAMSG1 time-frequency resources in the resource set can also be predefined, so that the type field does not need to be configured in the resource set. For example, the aforementioned time-frequency resource set {0, 2, {t0, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}, 1, 1, {t0+2ot2, dt1, f0, df1}, {0, of}} can be simplified to the time-frequency resource set {2, {t0, dt2, f0, df2}, {0, of}, {ot2, 0}, {ot2, of}, 1, {t0+2ot2, dt1, f0, df1}, {0, of}}. In this way, the amount of data of the first signaling can be reduced.

[0263] In some embodiments, the first signaling can also indicate the aforementioned at least one 3RAMSG1 time-frequency resource and at least one 2RAMSG1 time-frequency resource by the aforementioned third indication manner.

[0264] For example, for the case shown in FIG. 6B and FIG. 6C, the time-frequency resource set indicated in the first signaling can be {2, 1, {t0, dt2, f0, df1}, {t0, dt2, f0+of, df2}, {t0+ot2, dt2, f0, df1}, {t0+ot2, dt2, f0+of, df2}, {t0+2ot2, dt1, f0, df1}, {t0+ot2, dt1, f0+of, df1}}; or {2, {t0, dt2, f0, df1}, {t0, dt2, f0+of, df2}, {t0+ot2, dt2, f0, df1}, {t0+ot2, dt2, f0+of, df2}, 1, {t0+2ot2, dt1, f0, df1}, {t0+ot2, dt1, f0+of, df1}}.

[0265] Exemplarily, the first signaling can indicate two sets of time-frequency resources (e.g., two lists, two fields, etc.), one set of time-frequency resources corresponding to one type of time-frequency resources. For the cases shown in FIG. 6B and FIG. 6C, the two sets of time-frequency resources can be time-frequency resource set {{t0, dt2, f0, df1}, {t0, dt2, f0+of, df2}, {t0+ot2, dt2, f0, df1}, {t0+ot2, dt2, f0+of, df2}} and time-frequency resource set {{t0+2ot2, dt1, f0, df1}, {t0+ot2, dt1, f0+of, df1}} respectively.

[0266] In some embodiments, the RD can transmit the time-frequency resource indication information indicating the at least one 2RAMSG1 time-frequency resource and the 3RAMSG1 time-frequency resource to the A-IoT device through the PRDCH in the form of L1 control or high layer signaling. For details, reference can be made to the foregoing step S401, which will not be repeated here.

[0267] In some embodiments, the first signaling can be any signaling, including but not limited to a paging message, a repaging message, a slot start message, an occasion start message, a query, a query rep message, a round start message, etc.

[0268] In some embodiments, the first signaling can indicate the device identifier or device group of the A-IoT device that needs to respond to the first signaling, or can also indicate that all devices receiving the first signaling need to respond to the first signaling.

[0269] In some embodiments, the first signaling can further include at least one of the following parameters in the foregoing access power condition: a power threshold, a number threshold, a time threshold, and a power required for the 3RA procedure.

[0270] In some embodiments, the first signaling can further include an inventory identifier.

[0271] S602A, the 3RA A-IoT device selects the 3RAMSG1 time-frequency resource in response to satisfying the access power condition, and sends the 3RAMSG1 to the RD based on the selected 3RAMSG1 time-frequency resource.

[0272] 3RA A-IoT device can select one (or multiple) 3RA MSG1 time-frequency resource from the at least one 3RA MSG1 time-frequency resource indicated by the first signaling. When the transmission occasion of the selected 3RA MSG1 time-frequency resource comes, the 3RA A-IoT device can send 3RA MSG1 to the RD through the 3RA MSG1 time-frequency resource.

[0273] For example, referring to FIG. 6B, the 3RA A-IoT device can select any one of time-frequency resource 3RA1-1', time-frequency resource 3RA1-2', time-frequency resource 3RA1-3', or time-frequency resource 3RA1-4' to send 3RA MSG1. If multiple 3RA A-IoT devices all select time-frequency resource 3RA1-1' or time-frequency resource 3RA1-2' or time-frequency resource 3RA1-3' or time-frequency resource 3RA1-4', the multiple 3RA A-IoT devices exist conflict.

[0274] S602B, the 2RA A-IoT device waits for access.

[0275] The 2RA A-IoT device can wait for access before the transmission occasion of the 2RA MSG1 time-frequency resource comes. Step S602B is optional.

[0276] S603, the 2RA A-IoT device selects a 2RA MSG1 time-frequency resource and sends 2RA MSG1 to the RD based on the selected 2RA MSG1 time-frequency resource in response to not satisfying the access power condition.

[0277] The 2RA A-IoT device can select one (or multiple) 2RA MSG1 time-frequency resource from the at least one 2RA MSG1 time-frequency resource indicated by the first signaling in response to not satisfying the access power condition after receiving the first signaling. When the transmission occasion of the selected 2RA MSG1 time-frequency resource comes, the 2RA A-IoT device can send 2RA MSG1 to the RD through the 2RA MSG1 time-frequency resource.

[0278] For example, referring to FIG. 6B, the 2RA A-IoT device can select time-frequency resource 2RA1-1' or time-frequency resource 2RA1-2' to send 2RA MSG1. If two 2RA A-IoT devices both select time-frequency resource 2RA1-1' or time-frequency resource 2RA1-2', the two 2RA A-IoT devices exist conflict.

[0279] It should be noted that steps S604 to S606 are substantially the same as steps S404 to S406, and will not be described again below.

[0280] S604, the RD sends 2RAMSG2 and 3RAMSG2 in response to 2RAMSG1 and 3RMSG1, wherein 3RAMSG2 indicates 3RAMSG3 time-frequency resources corresponding to 3RA A-IoT devices without conflicts.

[0281] S605A, the 2RA A-IoT device sleeps or is turned off.

[0282] S605B, the 3RA A-IoT device sends 3RAMSG3 based on the corresponding 3RAMSG3 time-frequency resources in response to 3RAMSG2.

[0283] S606, the 3RA A-IoT device sleeps or is turned off.

[0284] Based on the above method, the RD can indicate 2RAMSG1 time-frequency resources and 3RAMSG1 time-frequency resources in the first signaling, so that the A-IoT device can select the corresponding time-frequency resources to use the corresponding random access mode to perform random access with the RD based on whether the A-IoT device itself meets the access power condition.

[0285] In some embodiments, the 2RAMSG1 time-frequency resources in the first signaling can overlap in the time domain with the 3RAMSG1 time-frequency resources (or can not overlap), and the 2RAMSG1 time-frequency resources can be different from the 3RAMSG1 time-frequency resources in the frequency domain. That is, the 2RAMSG1 time-frequency resources and the 3RAMSG1 time-frequency resources can be frequency-division time-frequency resources.

[0286] Exemplarily, FIG. 7A shows an interaction flow diagram of a random access method corresponding to frequency-division 2RAMSG1 time-frequency resources and 3RAMSG1 time-frequency resources according to some embodiments of the present application; and FIG. 7B shows a process diagram of a random access method corresponding to frequency-division 2RAMSG1 time-frequency resources and 3RAMSG1 time-frequency resources according to some embodiments of the present application. As shown in FIG. 7A, the method includes the following steps.

[0287] S701: the RD sends first signaling, the first signaling indicating at least one 2RAMSG1 time-frequency resource and at least one 3RAMSG1 time-frequency resource, wherein the 2RAMSG1 time-frequency resource is different from the 3RAMSG1 time-frequency resource in the frequency domain.

[0288] The RD can send the first signaling according to its own operation logic or a request sent by another device, and the first signaling can indicate at least one 2RAMSG1 time-frequency resource and at least one 3RAMSG1 time-frequency resource, where the 2RAMSG1 time-frequency resource is different from the 3RAMSG1 time-frequency resource in the frequency domain.

[0289] For example, referring to FIG. 7B, the 2RAMSG1 time-frequency resource indicated by the first signaling sent by the RD can include time-frequency resource 2RA1-1" and time-frequency resource 2RA1-2"; and the 3RAMSG1 time-frequency resource indicated by the first signaling can include time-frequency resource 3RA1-1", time-frequency resource 3RA1-2", time-frequency resource 3RA1-3", and time-frequency resource 3RA1-4". Wherein, the 2RAMSG1 time-frequency resource (time-frequency resource 2RA1-1" and time-frequency resource 2RA1-2") and the 3RAMSG1 time-frequency resource (time-frequency resource 3RA1-1", time-frequency resource 3RA1-2", time-frequency resource 3RA1-3", and time-frequency resource 3RA1-4") overlap in the time domain and are different in the frequency domain.

[0290] FIG. 7C shows a time domain and frequency domain division diagram of each time-frequency resource in FIG. 7B according to some embodiments of the present application. Referring to FIG. 7C:

[0291] The time-frequency resource 2RA1-1" is a time-frequency resource from t0 to t0+dt1 in the time domain and from f0 to f0+df1 in the frequency domain;

[0292] The time-frequency resource 2RA1-2" is a time-frequency resource from t0 to t0+dt1 in the time domain and from f0+of1 to f0+of1+df1 in the frequency domain;

[0293] The time-frequency resource 3RA1-1" is a time-frequency resource from t0 to t0+dt2 in the time domain and from f0" to f0"+df2 in the frequency domain;

[0294] The time-frequency resource 3RA1-2" is a time-frequency resource from t0 to t0+dt2 in the time domain and from f0"+of2 to f0"+of2+df2 in the frequency domain;

[0295] The time-frequency resource 3RA1-3" is a time-frequency resource from t0+ot2 to t0+ot2+dt2 in the time domain and from f0" to f0"+df2 in the frequency domain;

[0296] The time-frequency resource 3RA1-4" is a time-frequency resource from t0+ot2 to t0+ot2+dt2 in the time domain and from f0"+of2 to f0"+of2+df2 in the frequency domain.

[0297] In some embodiments, the first signaling can indicate the at least one 2RA MSG1 time-frequency resource and the at least one 3RA MSG1 time-frequency resource by the aforementioned first indication manner. For example, for the cases shown in FIG. 7B and FIG. 7C, if the order of t0, f0, dt1, df1, ot1, of1, dt2, df2, ot2, of2, time-frequency resources (2RA MSG1 time-frequency resources first and 3RA MSG1 time-frequency resources second) is the preset resource parameter, the aforementioned time-frequency resource 2RA1-1", time-frequency resource 2RA1-2", time-frequency resource 3RA1-1", time-frequency resource 3RA1-2", time-frequency resource 3RA1-3' and time-frequency resource 3RA1-4" can be indicated by {Q1=1, Q2=2} in the first signaling.

[0298] In some embodiments, the first signaling can indicate the at least one 2RA MSG1 time-frequency resource and the at least one 3RA MSG1 time-frequency resource by the aforementioned second indication manner.

[0299] Exemplarily, assuming that type=1 (other values are also possible) indicates 2RA MSG1 time-frequency resources, type=0 (other values are also possible) indicates 3RA MSG1 time-frequency resources, the first signaling based on the aforementioned second indication manner can indicate 2 Q1 Q1 RA MSG1 time-frequency resources by the resource set {1, Q1, {timestart, duration, freqstart, bandwidth}, (2 Q2 Q2 RA MSG1 time-frequency resources by the resource set {0, Q2, {timestart, duration, freqstart, bandwidth}, (2 Q2 Q2 For example, for the cases shown in FIG. 7B and FIG. 7C, time-frequency resource 3RA1-1", time-frequency resource 3RA1-2", time-frequency resource 3RA1-3" and time-frequency resource 3RA1-4" can be indicated by the resource set {0, 2, {t0, dt2, f0", df2}, {0, of2}, {ot2, 0}, {ot2, of2}}; time-frequency resource 2RA1-1", time-frequency resource 2RA1-2" can be indicated by the resource set {1, 1, {t0, dt1, f0, df1}, {0, of1}}.

[0300] It should be noted that the resource set indicating 2RAMSG1 time-frequency resources and the resource set indicating 3RAMSG1 time-frequency resources can also be combined into one resource set. For example, for the cases shown in FIG. 7B and FIG. 7C, the aforementioned time-frequency resources 2RA1-1", 2RA1-2", 3RA1-1", 3RA1-2", 3RA1-3" and 3RA1-4" can be indicated by a time-frequency resource set {1, 1, {t0, dt1, f0, df1}, {0, of2}, {ot2, 0}, {ot2, of2}, 0, 2, {t0, dt2, f0", df2}, {0, of1}}.

[0301] In some embodiments, the order of 2RAMSG1 time-frequency resources and 3RAMSG1 time-frequency resources in the resource set can also be predefined, so that the type field does not need to be configured in the resource set. For example, the aforementioned time-frequency resource set {1, 1, {t0, dt1, f0, df1}, {0, of2}, {ot2, 0}, {ot2, of2}, 0, 2, {t0, dt2, f0", df2}, {0, of1}} can be simplified to a time-frequency resource set {{1, {t0, dt1, f0, df1}, {0, of2}, {ot2, 0}, {ot2, of2}, 2, {t0, dt2, f0", df2}, {0, of1}}}. In this way, the amount of data of the first signaling can be reduced.

[0302] In some embodiments, the first signaling can also indicate the aforementioned at least one 2RAMSG1 time-frequency resource and at least one 3RAMSG1 time-frequency resource by the aforementioned third indication manner.

[0303] For example, for the cases shown in FIG. 7B and FIG. 7C, the time-frequency resource set indicated by the first signaling can be {1, 2, {t0, dt1, f0, df1}, {t0, dt1, f0+of1, df1}, {t0, dt2, f0", df2}, {t0, dt2, f0"+of2, df2}, {t0+ot2, dt2, f0", df2}, {t0+ot2, dt2, f0"+of2, df2}}; or {1, {t0, dt1, f0, df1}, {t0, dt1, f0+of1, df1}, 2, {t0, dt2, f0", df2}, {t0, dt2, f0"+of2, df2}, {t0+ot2, dt2, f0", df2}, {t0+ot2, dt2, f0"+of2, df2}}.

[0304] Exemplarily, two time-frequency resource sets (e.g. two lists, two fields, etc.) can be indicated in the first signaling, one time-frequency resource set corresponding to one type of time-frequency resource. For example, for the cases shown in FIG. 7B and FIG. 7C, the two time-frequency resource sets can be time-frequency resource set {{t0, dt1, f0, df1}, {t0, dt1, f0+of1, df1}} and time-frequency resource set {{t0, dt2, f0", df2}, {t0, dt2, f0"+of2, df2}, {t0+ot2, dt2, f0", df2}, {t0+ot2, dt2, f0"+of2, df2}}.

[0305] In some embodiments, the RD can transmit the time-frequency resource indication information indicating the at least one 2RAMSG1 time-frequency resource and the 3RAMSG1 time-frequency resource to the A-IoT device through the PRDCH in the form of L1 control or high layer signaling. For details, reference can be made to the foregoing step S401, which will not be repeated here.

[0306] In some embodiments, the first signaling can be any signaling, including but not limited to a paging message, a repaging message, a slot start message, an occasion start message, a query, a query rep message, a round start message, etc.

[0307] In some embodiments, the first signaling can indicate the device identity or device group of the A-IoT device that needs to respond to the first signaling, or can also indicate that all devices receiving the first signaling need to respond to the first signaling.

[0308] In some embodiments, the first signaling can further include at least one of the following parameters in the foregoing access power condition: a power threshold, a number threshold, a time threshold, and a power required for the 3RA procedure.

[0309] In some embodiments, the first signaling can further include an inventory identifier.

[0310] S702A, the 3RA A-IoT device selects a 3RAMSG1 time-frequency resource in response to satisfying the access power condition, and sends a 3RAMSG1 to the RD based on the selected 3RAMSG1 time-frequency resource.

[0311] 3RA A-IoT device, after receiving the first signaling, can determine to access to the RD by 3RA in response to itself satisfying the access power condition, and select one (or multiple) 3RA MSG1 time-frequency resource from the at least one 3RA MSG1 time-frequency resource indicated by the first signaling. When the transmission occasion of the selected 3RA MSG1 time-frequency resource comes, the 3RA A-IoT device can send 3RA MSG1 to the RD through the 3RA MSG1 time-frequency resource.

[0312] Exemplarily, referring to FIG. 7B, the 3RA A-IoT device can select any one of the time-frequency resource 3RA1-1", the time-frequency resource 3RA1-2", the time-frequency resource 3RA1-3", or the time-frequency resource 3RA1-4" to send 3RA MSG1. If multiple 3RA A-IoT devices all select the time-frequency resource 3RA1-1" or the time-frequency resource 3RA1-2" or the time-frequency resource 3RA1-3" or the time-frequency resource 3RA1-4", there is a conflict among the multiple 3RA A-IoT devices.

[0313] S702B, the 2RA A-IoT device, in response to not satisfying the access power condition, selects a 2RA MSG1 time-frequency resource, and sends 2RA MSG1 to the RD based on the selected 2RA MSG1 time-frequency resource.

[0314] The 2RA A-IoT device, after receiving the first signaling, can determine to access to the RD by 2RA in response to itself not satisfying the access power condition, and select one (or multiple) 2RA MSG1 time-frequency resource from the at least one 2RA MSG1 time-frequency resource indicated by the first signaling. When the transmission occasion of the selected 2RA MSG1 time-frequency resource comes, the 2RA A-IoT device can send 2RA MSG1 to the RD through the 2RA MSG1 time-frequency resource.

[0315] For example, referring to FIG. 7B, the 2RA A-IoT device can select the time-frequency resource 2RA1-1" or the time-frequency resource 2RA1-2" to send 2RA MSG1. If two 2RA A-IoT devices both select the time-frequency resource 2RA1-1" or the time-frequency resource 2RA1-2", there is a conflict among the two 2RA A-IoT devices. In some embodiments, the step S702A and the step S702B can be executed in parallel.

[0316] It should be noted that the steps S703 to S705 are substantially the same as the steps S404 to S406, which will not be described again hereinafter.

[0317] S703, the RD transmits 2RA MSG2 and 3RA MSG2 in response to 2RA MSG1 and 3RA MSG1, wherein the 3RA MSG2 indicates 3RA MSG3 time-frequency resources corresponding to 3RA A-IoT devices without conflict.

[0318] S704A, the 2RA A-IoT device sleeps or shuts down.

[0319] S704B, the 3RA A-IoT device transmits 3RA MSG3 in response to 3RA MSG2 based on the corresponding 3RA MSG3 time-frequency resources.

[0320] S705, the 3RA A-IoT device sleeps or shuts down.

[0321] Based on the above method, the RD can indicate 2RA MSG1 time-frequency resources and 3RA MSG1 time-frequency resources in the first signaling, so that the A-IoT device can select the corresponding time-frequency resources to perform random access with the RD based on whether the A-IoT device itself meets the access power condition, using the corresponding random access mode.

[0322] The embodiments of the present application also provide a random access method.

[0323] Exemplarily, FIG. 8 shows an interaction flow diagram of a random access method according to some embodiments of the present application.

[0324] As shown in FIG. 8, the method comprises the following steps:

[0325] S801, a reading device transmits first signaling, the first signaling indicating at least one first type time-frequency resource of a first random access mode and at least one second type time-frequency resource of a second random access mode.

[0326] In some embodiments, the first random access mode is 3RA, and the second random access mode is 2RA. Correspondingly, the first type time-frequency resource can be 2RA MSG1 time-frequency resource, and the second type time-frequency resource can be 3RA MSG1 time-frequency resource.

[0327] In some embodiments, the first type time-frequency resource and the second type time-frequency resource can be time-division time-frequency resources. For example, the first type time-frequency resource is before the second type time-frequency resource in the time domain, or the first type time-frequency resource is after the second type time-frequency resource in the time domain. In this case, the way in which the RD transmits the first signaling can refer to the aforementioned step S401 or step S601, which will not be described here.

[0328] In some embodiments, the first type of time-frequency resources and the second type of time-frequency resources can be frequency-division time-frequency resources. For example, the first type of time-frequency resources and the second type of time-frequency resources can have overlap in the time domain and be different in the frequency domain. In this case, the manner in which the RD transmits the first signaling can refer to the aforementioned step S701, and will not be described here.

[0329] In some embodiments, the first type of time-frequency resources and the second type of time-frequency resources are predefined time-frequency resources. In this case, the first signaling can include the number of the first type of time-frequency resources and the number of the second type of time-frequency resources, and indicate the at least one first type of time-frequency resource and the at least one second type of time-frequency resource through the number of the first type of time-frequency resources and the number of the second type of time-frequency resources. The content of the indication of the 2RAMSG1 time-frequency resources and the 3RAMSG1 time-frequency resources by the first indication manner can refer to the aforementioned steps S401, S601, and S701, and will not be described here.

[0330] In some embodiments, the first signaling can include the number of the first type of time-frequency resources and the number of the second type of time-frequency resources, the starting frequency and the starting time of the first time-frequency resource in the at least one first type of time-frequency resource, the frequency domain size and the time domain size of the first type of time-frequency resources, the time domain offset and the frequency domain offset of each first type of time-frequency resource relative to the first time-frequency resource of the first type of time-frequency resources, the starting frequency and the starting time of the first time-frequency resource in the at least one second type of time-frequency resource, the frequency domain size and the time domain size of the second type of time-frequency resources, the time domain offset and the frequency domain offset of each second type of time-frequency resource relative to the first time-frequency resource of the second type of time-frequency resources. The specific content of the indication of the at least one first type of time-frequency resource and the at least one second type of time-frequency resource by the first signaling through this manner can refer to the content of the indication of the 2RAMSG1 time-frequency resources and the 3RAMSG1 time-frequency resources by the second indication manner in the aforementioned steps S401, S601, and S701, and will not be described here.

[0331] In some embodiments, the first signaling can further include the starting frequency, the starting time, the time domain size, and the frequency domain size of each first type of time-frequency resource, and the starting frequency, the starting time, the time domain size, and the frequency domain size of each second type of time-frequency resource. This is equivalent to the aforementioned third indication manner for indicating the at least one first type of time-frequency resource and the at least one second type of time-frequency resource. The specific content can refer to the content of the indication of the 2RAMSG1 time-frequency resources and the 3RAMSG1 time-frequency resources by the third indication manner in the aforementioned steps S401, S601, and S701, and will not be described here.

[0332] S802, in response to the first signaling, the A-IoT device determines to access to the reading device by the first random access manner and the first time-frequency resource, or determines to access to the reading device by the second random access manner and the second time-frequency resource.

[0333] After receiving the first signaling, the A-IoT device can determine to access to the reading device by the first random access manner or by the second random access manner based on the remaining power or the device type of the A-IoT device. In the case of determining to access to the reading device by the first random access manner, the A-IoT device can determine the first time-frequency resource from the at least one first type of time-frequency resource; in the case of determining to access to the reading device by the second random access manner, the A-IoT device can determine the second time-frequency resource from the at least one second type of time-frequency resource.

[0334] In some embodiments, in the case of the A-IoT device determining to access to the reading device by the first random access manner and the first time-frequency resource, the A-IoT device is equivalent to the aforementioned 3RA A-IoT device.

[0335] In some embodiments, in the case of the A-IoT device determining to access to the reading device by the second random access manner and the second time-frequency resource, the A-IoT device is equivalent to the aforementioned 2RA A-IoT device.

[0336] In some embodiments, in the case of the A-IoT device having a high remaining power or a low peak power / consumption, the A-IoT device can determine to access to the reading device by the first random access manner and the first time-frequency resource; in the case of the A-IoT device having a low remaining power or a high peak power / consumption, the A-IoT device can determine to access to the reading device by the second random access manner and the second time-frequency resource. Illustratively, the A-IoT device can determine to access to the reading device by the first random access manner and the first time-frequency resource in the case of satisfying the aforementioned access power condition, and determine to access to the reading device by the second random access manner and the second time-frequency resource in the case of not satisfying the aforementioned access power condition.

[0337] S803, accessing to the reading device by the determined random access manner and time-frequency resource.

[0338] After determining the random access manner and the time-frequency resource, the A-IoT device can access to the reading device by the determined random access manner and time-frequency resource. For example, in the case of determining to access to the reading device by the first random access manner and the first time-frequency resource, the A-IoT device can access to the reading device by the following steps S01 to S04:

[0339] S01, the A-IoT device sends a first message (equivalent to 3RAMSG1) to the reading device through the first time-frequency resource, wherein the first message comprises a first identifier (for example, a RID generated by the A-IoT device).

[0340] S02, the reading device sends a second message (equivalent to 3RAMSG2) to the A-IoT device in response to the first message, and the second message comprises the first identifier.

[0341] S03, the A-IoT device sends a third message (equivalent to 3RAMSG3) to the reading device in response to the second message, and the third message comprises a device identifier of the A-IoT device.

[0342] In some embodiments, the second message can further comprise a state switching indication.

[0343] S04, the A-IoT device sleeps or is turned off.

[0344] It should be noted that the A-IoT device can autonomously sleep or be turned off after sending the third message, or can sleep or be turned off in response to the state switching indication in the second message.

[0345] The specific process in which the A-IoT device accesses the reading device through the first random access manner can refer to the process in which the 3RA A-IoT device accesses the reading device in the embodiments shown in FIG. 4A, FIG. 6A, and FIG. 7A, and will not be described here.

[0346] For another example, in the case of determining to access the reading device by using the second random access manner and the second time-frequency resource, the A-IoT device can access the reading device by the following steps S11 to S13:

[0347] S11, the A-IoT device sends a fourth message (equivalent to 2RAMSG1) to the reading device through the second time-frequency resource, wherein the fourth message comprises a second identifier (for example, a RID generated by the A-IoT device) and a device identifier of the A-IoT device, or the fourth message comprises the device identifier.

[0348] In some embodiments, the A-IoT device switches to a sleep state or an off state before the transmission occasion of the second time-frequency resource arrives so as to be charged, and switches to a working state before the transmission occasion of the second time-frequency resource arrives. After switching to the working state, the A-IoT device can send the fourth message to the reading device. In addition, before switching to the sleep state or the off state, the A-IoT device can also store a first state identifier indicating that the A-IoT device has not completed random access, so as to continue processing after switching to the working state.

[0349] S12, the reading device sends a fifth message (equivalent to 2RAMSG2) to the A-IoT device in response to the fourth message, the fifth message comprising the second identifier and / or the device identifier.

[0350] In some embodiments, a state switching identifier can be included in the fifth message, for instructing the A-IoT device to switch to the sleep state or the shutdown state after receiving the fifth message.

[0351] S13, the A-IoT device sleeps or shuts down in response to the fifth message.

[0352] In some embodiments, the A-IoT device can autonomously switch to the sleep state or the shutdown state in response to the fifth message, or switch to the sleep state or the shutdown state in response to the state switching identifier in the fifth message, which is not limited herein.

[0353] The specific process of the A-IoT device accessing the reading device through the second random access manner can refer to the process of the 2RA A-IoT device accessing the reading device in the embodiments shown in FIG. 4A, FIG. 6A, and FIG. 7A, which is not described herein.

[0354] Based on the above method, the A-IoT device can determine the access manner of the A-IoT device and the RD based on whether the A-IoT device meets the access power condition, and select the time-frequency resource corresponding to the determined access manner from the first type of time-frequency resource and the second type of time-frequency resource to perform random access with the RD.

[0355] Based on the same technical concept, the embodiments of the present application further provide a reading device, comprising one or more processors; one or more memories; the one or more memories store one or more computer programs, and the one or more computer programs comprise instructions, when the instructions are executed by the one or more processors, the reading device performs one or more steps executed by the RD in any of the above random access methods.

[0356] Based on the same technical concept, the embodiments of the present application further provide an environmental Internet of Things device, comprising one or more processors; one or more memories; the one or more memories store one or more computer programs, and the one or more computer programs comprise instructions, when the instructions are executed by the one or more processors, the environmental Internet of Things device performs one or more steps executed by the environmental Internet of Things device in any of the above random access methods. Alternatively, the environmental Internet of Things device comprises one or more processing circuits, and the one or more processing circuits can implement one or more steps executed by the environmental Internet of Things device in any of the above random access methods.

[0357] Based on the same technical concept, the embodiments of the present application further provide a communication system, comprising the environmental Internet of Things device and the reading device.

[0358] Based on the same technical concept, the embodiments of the present application further provide a computer readable storage medium, which stores computer executable program instructions, and the computer executable program instructions, when running on a computer (for example, the reading device or the environmental Internet of Things device), cause the computer or the processor to perform one or more steps in any one of the above methods.

[0359] Based on the same technical concept, the embodiments of the present application further provide a computer program product containing instructions, and the computer program product comprises computer program codes, and the computer program codes, when running on a computer (for example, the reading device or the environmental Internet of Things device), cause the computer or the processor or the processing circuit to perform one or more steps in any one of the above methods.

[0360] Exemplarily, FIG. 9 shows a structural schematic diagram of a reading device 10 according to some embodiments of the present application.

[0361] As shown in FIG. 9, the reading device 10 comprises one or more processors 110, one or more memories 120 and one or more communication interfaces 130. The processor 110, the memory 120 and the communication interface 130 can be coupled through a bus (not shown), which can be a passage for transmitting information between various components (for example, the processor 110, the memory 120 and the communication interface 130) of the device 100.

[0362] The processor 110 can comprise any one or more of a central processing unit (CPU), a graphics processing unit (GPU), a micro processor (MP), a digital signal processor (DSP), a baseband processor (BP), an application processor (AP) and the like.

[0363] The memory 120 can include volatile memory, such as random access memory (RAM) and non-volatile memory, such as read-only memory (ROM), flash memory, a hard disk drive (HDD), or a solid state drive (SSD).

[0364] The executable program code is stored in the memory 120, and the processor 110 executes the executable program code to implement the functions of the RD described above, thereby implementing the random access method described above. That is, the memory 120 stores instructions for executing the random access method provided by the embodiments of the present application.

[0365] The communication interface 130 uses a transceiver module such as, but not limited to, a network interface card and a transceiver to implement communication between the reading device 10 and other devices or communication networks.

[0366] In some embodiments, the communication interface 130 can communicate with other devices through a fifth generation (5G) mobile communication system (such as a new radio (NR) system), a universal mobile communication system (UMTS), a wireless local area network (WLAN), a wireless fidelity (Wi-Fi) system, a wired system, a vehicular to everything (V2X) communication system, a device-to-device (D2D) communication system, a fourth generation (4G) mobile communication system, a satellite communication system, and a future communication system (such as a sixth generation (6G) mobile communication system). th th Generation, 4G) mobile communication system, a satellite communication system, and a future communication system (such as a sixth generation (6G) mobile communication system). th

[0367] It should be noted that in other embodiments, the RD can also have a structure different from the RD 10, and can also include more or fewer modules, which are not limited here.

[0368] ​​It should be noted that the reading device in the embodiments of the present application can be an entity for transmitting or receiving signals, such as a base station. The base station can be variously named or replaced by the following names in a broad sense, such as: Node B (Node B), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, multi-mode wireless node, home base station, network controller, access node, access point, transmission node, transceiver node, baseband unit, radio frequency remote unit, active antenna unit, radio frequency head, central unit, distribution unit, positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like. The base station can also be a communication module, modem, or chip provided in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device that performs the function of a base station in device-to-device, vehicle external connection, and machine-to-machine communication. The embodiments of the present application do not limit the specific technology and specific device form of the reading device.

[0369] It should be noted that the reading device in the embodiments of the present application can be any terminal device, including but not limited to a mobile station (MS), a mobile terminal (MT), etc. The reading device can be a mobile phone, a smart television, a wearable device, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc.

[0370] Exemplarily, FIG. 10 shows a structural schematic diagram of an A-IoT device according to some embodiments of the present application.

[0371] As shown in FIG. 10, the A-IoT device 20 includes one or more processing circuits 210, one or more storage circuits 220, and one or more communication circuits 240. The processing circuit 210, the storage circuit 220, the energy storage circuit 230, and the communication circuit 240 can be coupled through a bus (not shown), which can be a pathway for transferring information between the various components (e.g., the processing circuit 210, the storage circuit 220, the energy storage circuit 230, and the communication circuit 240) of the device 100.

[0372] The processing circuit 210 can be configured to implement the control of the A-IoT device 20 and execute the instructions of the random access method provided by the embodiments of the present application. For example, the processing circuit 210 can generate the RID and send the 3RAMSG1, the 3RAMSG3, and the 2RAMSG1 to the RD through the communication circuit 240.

[0373] In some embodiments, the processing circuit 210 can be a low-power processor, or a processing circuit.

[0374] The storage circuit 220 is configured to store data and instructions.

[0375] For example, the storage circuit 220 stores executable program codes, and the processing circuit 210 executes the executable program codes to implement the functions of the A-IoT device as described above, thereby implementing the random access method as described above. That is, the storage circuit 220 stores instructions for executing the random access method provided by the embodiments of the present application.

[0376] For another example, the storage circuit 220 can also be configured to store the DID of the A-IoT device 20.

[0377] The energy storage circuit 230 includes energy storage devices (e.g., capacitors, inductors) and conversion circuits. The conversion circuit is configured to convert external energy (e.g., electromagnetic waves received by the antenna in the communication circuit 240) into electrical energy, and the energy storage device is configured to store the electrical energy.

[0378] The communication circuit 240 uses a transceiver module such as, but not limited to, a network interface card and a transceiver to implement the communication between the A-IoT device 20 and other devices or communication networks. For example, the communication circuit 240 can include an antenna for obtaining energy from the environment and delivering it to the energy storage circuit 230.

[0379] In some embodiments, the communication circuit 240 can communicate with other devices in a wireless manner. For example, the DID and the RID are sent to other devices, or the first signaling, the 3RAMSG2, and the 2RAMSG2 sent by other devices are received.

[0380] It should be noted that the structure of the A-IoT device 20 shown in FIG. 10 is only an example, and in other embodiments, the A-IoT device can also have other structures, which are not limited herein.

[0381] It should be noted that the A-IoT device 20 can be any form of A-IoT device.

[0382] It should be noted that the terms used in the implementation part of the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" herein only describes the association relationship of the associated obstacles, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two, "at least one" and "one or more" means one, two or more than two.

[0383] It should be noted that in the embodiments of the present application, greater than or equal to, and the corresponding less than, equal to can also be used with less than. For example, indicating that a certain parameter corresponds to B when it is greater than or equal to A, and C when it is less than A, can also be understood as the parameter corresponding to B when it is greater than A, and C when it is less than or equal to A.

[0384] Hereinafter, the terms "first", "second" are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the "first", "second" features can explicitly or implicitly include one or more features.

[0385] In this specification, the reference to "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in other some embodiments" and the like appearing in various places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized. The terms "include", "contain", "have" and their variants mean "include but not limited to", unless otherwise specifically emphasized.

[0386] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in or transmitted by a computer readable storage medium. The computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through a wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media, or semiconductor media (such as solid state disk (SSD)) and the like.

[0387] Those of ordinary skill in the art understand that all or part of the processes in the above embodiments can be implemented by a computer program to instruct the relevant hardware, which can be stored in a computer readable storage medium, and when executed, can include the processes of the above embodiments.

[0388] The above is only a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the embodiments of the present application should be covered in the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A random access method applied to environmental IoT devices, characterized in that, The method comprises: receiving first signaling sent by a reading device, the first signaling indicating at least one first type of time-frequency resource of a first random access mode and at least one second type of time-frequency resource of a second random access mode; in response to the first signaling, determining to access the reading device by using the first random access mode and a first time-frequency resource, or determining to access the reading device by using the second random access mode and a second time-frequency resource, wherein the first time-frequency resource is a time-frequency resource in the first type of time-frequency resource, and the second time-frequency resource is a time-frequency resource in the second type of time-frequency resource.

2. The method of claim 1, wherein, The first random access mode is a three-step random access, and the second random access mode is a two-step random access.

3. The method of claim 1, wherein, The determining to access the reading device by using the first random access mode and a first time-frequency resource, or determining to access the reading device by using the second random access mode and a second time-frequency resource comprises: determining to access the reading device by using the first random access mode and a first time-frequency resource, or determining to access the reading device by using the second random access mode and a second time-frequency resource based on a type of the environmental Internet of Things device or a remaining power of the environmental Internet of Things device.

4. The method of claim 1, wherein, The method further comprises: accessing the reading device by using the determined random access mode and time-frequency resource.

5. The method of claim 4, wherein, The accessing the reading device by using the determined random access mode and time-frequency resource comprises: in a case where it is determined to access the reading device by using the first random access mode and a first time-frequency resource, sending a first message to the reading device through the first time-frequency resource, wherein the first message comprises a first identifier; receiving a second message sent by the reading device, the second message comprising the first identifier; in response to the second message, sending a third message to the reading device, the third message comprising a device identifier of the environmental Internet of Things device.

6. The method of claim 5, wherein, The second message indicates a third time-frequency resource used for transmitting the third message; and the sending a third message to the reading device in response to the second message comprises: sending a third message to the reading device through the third time-frequency resource.

7. The method of claim 6, wherein, The method further comprises: after sending the third message to the reading device, switching to a hibernation state or a shutdown state.

8. The method of claim 4, wherein, The accessing the reading device by using the determined random access mode and time-frequency resource comprises: in a case where it is determined to access the reading device by using the second random access mode and a second time-frequency resource, sending a fourth message to the reading device through the second time-frequency resource, wherein the fourth message comprises a second identifier and a device identifier of the environmental Internet of Things device, or the fourth message comprises the device identifier; receiving a fifth message sent by the reading device, the fifth message comprising the second identifier and / or the device identifier.

9. The method of claim 8, wherein, The second time-frequency resource is after the first time-frequency resource in time domain; and the method further comprises: in response to the first signaling, switching to a hibernation state or a shutdown state; before a transmission occasion of the second time-frequency resource arrives, switching to an operating state.

10. The method of claim 8, wherein, The method further includes: switching to a dormant state or an off state in response to the fifth message.

11. The method of claim 9, wherein, The method further includes: storing a first state identifier before switching to the dormant state or the off state, the first state identifier indicating that the environmental IoT device does not complete random access.

12. The method according to any one of claims 1 to 11, characterized in that, The first type of time-frequency resource is after the second type of time-frequency resource in the time domain, or the second type of time-frequency resource is after the first type of time-frequency resource in the time domain, or the first type of time-frequency resource is different from the second type of time-frequency resource in the frequency domain and the first type of time-frequency resource overlaps with the second type of time-frequency resource in the time domain.

13. The method according to any one of claims 1 to 12, characterized in that, The first type of time-frequency resource and the second type of time-frequency resource are predefined time-frequency resources, and the first signaling includes a quantity of the first type of time-frequency resource and a quantity of the second type of time-frequency resource.

14. The method of claim 13, wherein, The first signaling further indicates an order of the first type of time-frequency resource and the second type of time-frequency resource.

15. The method according to any one of claims 1 to 12, characterized in that, The first signaling includes: a quantity of the first type of time-frequency resource and a quantity of the second type of time-frequency resource, a starting frequency and a starting time of a first time-frequency resource in the at least one first type of time-frequency resource, a frequency domain size and a time domain size of the first type of time-frequency resource, a time domain offset and a frequency domain offset of each of the first type of time-frequency resource relative to the first time-frequency resource of the first type of time-frequency resource, a starting frequency and a starting time of a first time-frequency resource in the at least one second type of time-frequency resource, a frequency domain size and a time domain size of the second type of time-frequency resource, a time domain offset and a frequency domain offset of each of the second type of time-frequency resource relative to the first time-frequency resource of the second type of time-frequency resource.

16. The method according to any one of claims 1 to 12, characterized in that, The first signaling includes a starting time, a starting frequency, a time domain size and a frequency domain size of each of the first type of time-frequency resource, and a starting time, a starting frequency, a time domain size and a frequency domain size of each of the second type of time-frequency resource.

17. A random access method applied to a reading device, characterized in that, The method includes: sending first signaling, the first signaling indicating at least one first type of time-frequency resource of a first random access mode and at least one second type of time-frequency resource of a second random access mode; receiving a first message sent by a first environmental IoT device through the first type of time-frequency resource, and / or a fourth message sent by a second environmental IoT device through the second type of time-frequency resource, wherein the first message includes a first identifier, and the fourth message includes a second device identifier of the second environmental IoT device, or the fourth message includes the second device identifier and a second identifier; sending a second message to the first environmental IoT device in response to the first message, and / or sending a fifth message to the second environmental IoT device in response to the fourth message, wherein the second message includes the first identifier, and the fifth message includes the second device identifier and / or the second identifier.

18. The method of claim 17, wherein, The second message indicates a third time-frequency resource; and the method further includes: receiving a third message sent by the first environmental IoT device, the third message including a first device identifier of the first environmental IoT device.

19. The method of claim 18, wherein, The second message includes a state switching indication, and the state switching indication is used to indicate that the first environmental Internet of Things device switches to a dormant state or an off state after sending the third message.

20. The method of claim 17, wherein, The fifth message includes a state switching indication, and the state switching indication is used to indicate that the second environmental Internet of Things device switches to a dormant state or an off state.

21. The method of claim 17, wherein, The first type of time-frequency resource is after the second type of time-frequency resource in the time domain, or the second type of time-frequency resource is after the first type of time-frequency resource in the time domain, or the first type of time-frequency resource is different from the second type of time-frequency resource in the frequency domain and the first type of time-frequency resource overlaps with the second type of time-frequency resource in the time domain.

22. The method of any one of claims 17-21, wherein, The first signaling includes the number of the first type of time-frequency resource and the number of the second type of time-frequency resource.

23. The method of claim 22, wherein, The first signaling further indicates the order of the first type of time-frequency resource and the second type of time-frequency resource.

24. The method of any one of claims 17-21, wherein, The first signaling includes the number of the first type of time-frequency resource and the number of the second type of time-frequency resource, the starting frequency and starting time of the first time-frequency resource in the at least one first type of time-frequency resource, the frequency domain size and time domain size of the first type of time-frequency resource, the time domain offset and frequency domain offset of each first type of time-frequency resource relative to the first time-frequency resource of the first type of time-frequency resource, the starting frequency and starting time of the first time-frequency resource in the at least one second type of time-frequency resource, the frequency domain size and time domain size of the second type of time-frequency resource, and the time domain offset and frequency domain offset of each second type of time-frequency resource relative to the first time-frequency resource of the second type of time-frequency resource.

25. The method of any one of claims 17-24, wherein, The first signaling includes the starting time, starting frequency, time domain size and frequency domain size of each first type of time-frequency resource, and the starting time, starting frequency, time domain size and frequency domain size of each second type of time-frequency resource.

26. The method of claim 17, wherein, The first random access mode is a three-step random access, and the second random access mode is a two-step random access.

27. A random access method, comprising: Comprising: The first signaling sent by the reading device, wherein the first signaling includes at least one first type of time-frequency resource of a first random access mode and at least one second type of time-frequency resource of a corresponding second random access mode; The environmental Internet of Things device determines to access to the reading device by using the first random access mode and the first time-frequency resource or to access to the reading device by using the second random access mode and the second time-frequency resource in response to the first signaling, wherein the first time-frequency resource is a time-frequency resource in the first type of time-frequency resource, and the second time-frequency resource is a time-frequency resource in the second type of time-frequency resource.

28. An environmental Internet of Things device, comprising: Comprising: An energy storage circuit for converting energy in the environment into electrical energy; A processing circuit for implementing the random access method of any one of claims 1 to 16.

29. A reading device, characterized by Comprising: A memory for storing instructions; At least one processor for executing the instructions to enable the reading device to implement the random access method of any one of claims 17 to 26.

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