Method and apparatus for determining chip duration of device-to-reader / writer transmission

Abstract

Provided in the embodiments of the present application are a method and apparatus for determining a chip duration of a D2R transmission. The method comprises: a first device receiving first information sent by a second device, and sending a D2R transmission to the second device on the basis of the first information; and the first device determining a chip duration of the D2R transmission, wherein the first device determines the chip duration of the D2R transmission on the basis of the first information and / or a predefined manner and / or a D2R transmission (possibly but not limited to the D2R transmission).

Description

Method and apparatus for determining the duration of a slice transmitted from device to reader / writer Technical Field

[0001] The embodiments of this application relate to the field of communication technology. Background Technology

[0002] From the early days of 2G (second generation) to 4G (fourth generation) systems, cellular mobile communication systems primarily served mobile phones, i.e., mobile terminal devices held by people. With the rapid development of mobile internet and the Internet of Things (IoT), from the later stages of 4G to the present, the evolution of cellular mobile communication technology has considered and supported increasingly diverse IoT application scenarios. Correspondingly, more types of IoT device terminals have been supported and implemented in actual network deployments and service applications, such as eMTC (enhanced Machine-Type Communication) terminal devices, NB-IoT (Narrow Band Internet of Things) terminal devices, and RedCap (Reduced Capability) terminal devices. With the increasing diversity of IoT terminal device types, cellular mobile systems have gained increasingly stronger capabilities in providing services and offering services to vertical industries.

[0003] However, among the massive number of IoT devices, the area of ​​large-scale and lower-cost IoT terminal devices remains a gap in cellular mobile communication systems. In order to provide more robust, reliable, and complete IoT application solutions, how to support lower-cost IoT terminal devices in 3GPP (3rd Generation Partnership Project) cellular mobile systems has become an urgent problem to be solved.

[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this application and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this application. Summary of the Invention

[0005] The inventors discovered that RFID (Radio Frequency Identification) systems are a solution for the large-scale and lower-cost Internet of Things (IoT) terminal devices. RFID systems have a wide range of applications. The advantages of RFID systems include low tag cost and low price. RFID tags are small, with fewer restrictions on the size and material of the items they can be used with, making them easier to apply to various scenarios such as item management and tracking. Although RFID tags are inexpensive, the deployment and usage costs of RFID systems are higher compared to wide-area commercial networks. In terms of deployment, RFID systems are typically deployed locally, with dedicated networks, making it difficult to effectively amortize deployment costs. In terms of usage, if a manual handheld tag reader solution is used, labor costs may become the main operating expense and are difficult to reduce; if dedicated RFID ports or gateways are used for reading and management, deployment costs will increase significantly. Furthermore, the simple logical architecture of RFID systems and loose wireless resource management, such as the difficulty in effectively coordinating interference in radio wave transmission, generally result in lower system capacity and spectrum utilization efficiency for RFID systems.

[0006] Compared to existing RFID systems, leveraging existing commercial mobile cellular networks (such as LTE and 5G NR systems) to support industry applications requiring tag-based IoT devices can effectively reduce deployment costs, thereby lowering the barrier to entry for this type of IoT device deployment. Furthermore, existing commercial mobile cellular networks (such as LTE and 5G NR systems) offer significantly better network security and wireless resource management than existing RFID systems. Taking 5G systems as an example, 5G can provide high-security authentication, network coordination, and accurate and stable terminal device management mechanisms, effectively reducing labor costs and thus lowering the overall cost of using this type of IoT. It can also optimize the network to improve system capacity and spectrum utilization efficiency. This reduction in deployment and usage costs can effectively promote the application of tag-based IoT devices in business management and industrial manufacturing, accelerate the digitalization process of related industries, improve production efficiency, and ultimately contribute more effectively to social development.

[0007] As a new type of IoT terminal in 5G (fifth generation) systems, tag-based terminal devices (Ambient IoT devices, or A-IoT devices for short) face severe cost constraints. Their hardware capabilities are significantly weaker than those of ordinary smartphones and other IoT devices supported by existing cellular mobile communication systems. For example, tag-based terminal devices may lack a stable power supply (e.g., using ambient energy harvesting instead of conventional batteries), have narrower bandwidth, limited accuracy of their internal crystal oscillators due to cost constraints, and limited signal processing capabilities.

[0008] Due to the limited capabilities of A-IoT devices, which have extremely poor synchronization capabilities, determining the chip duration of the signal modulation slice when an A-IoT device sends a signal to a reader is a problem that urgently needs to be solved.

[0009] To address at least one of the above-mentioned problems or other similar issues, embodiments of this application provide a method and apparatus for determining the chip duration of a device-to-reader (D2R) transfer.

[0010] According to one aspect of the embodiments of this application, a method for determining the chip duration of D2R transmission is provided, applied to a first device, the method comprising:

[0011] The first device receives the first information sent by the second device, and sends a D2R transmission to the second device based on the first information.

[0012] The first device determines the chip duration of the D2R transmission.

[0013] According to another aspect of the embodiments of this application, a device for determining the chip duration of D2R transmission is provided, configured in a first device, the device comprising:

[0014] A receiving unit that receives the first information sent by the second device;

[0015] The sending unit sends a D2R transmission to the second device based on the first information;

[0016] The determining unit determines the chip duration of the D2R transmission.

[0017] According to another aspect of the embodiments of this application, a method for determining the chip duration of D2R transmission is provided, applied to a second device, the method comprising:

[0018] The second device sends first information to the first device and receives D2R transmission from the first device. The first device determines the chip duration of the D2R transmission.

[0019] According to another aspect of the embodiments of this application, a device for determining the chip duration of D2R transmission is provided, configured in a second device, the device comprising:

[0020] A sending unit that sends first information to the first device;

[0021] A receiving unit receives a D2R transmission from the first device, wherein the first device also determines the chip duration of the D2R transmission.

[0022] One of the beneficial effects of this application's embodiments is that, according to this application's embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. Furthermore, by determining the D2R chip duration through control by the second device (reader), the second device can predict the D2R chip duration, eliminating the need for blind detection and facilitating the second device's reception and demodulation of D2R transmissions.

[0023] Specific embodiments of this application are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of this application can be adopted. It should be understood that the embodiments of this application are not limited in scope. Within the spirit and scope of the appended claims, embodiments of this application include many changes, modifications, and equivalents.

[0024] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0025] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, whole, step, or component, but does not exclude the presence or addition of one or more other features, wholes, steps, or components. Attached Figure Description

[0026] The elements and features described in one drawing or embodiment of this application may be combined with elements and features shown in one or more other drawings or embodiments. Furthermore, in the drawings, similar reference numerals denote corresponding parts in several drawings and can be used to indicate corresponding parts used in more than one embodiment.

[0027] Figure 1 is a schematic diagram of a communication system according to an embodiment of this application;

[0028] Figure 2 is another schematic diagram of the communication system according to an embodiment of this application;

[0029] Figure 3 is another schematic diagram of the communication system according to an embodiment of this application;

[0030] Figure 4 is a schematic diagram of a method for determining chip duaration in D2R transmission according to an embodiment of this application;

[0031] Figure 5 is another schematic diagram of the method for determining chip duaration in D2R transmission according to an embodiment of this application;

[0032] Figure 6 is a schematic diagram of a device for determining chip duaration in D2R transmission according to an embodiment of this application;

[0033] Figure 7 is another schematic diagram of the device for determining chip duaration in D2R transmission according to an embodiment of this application;

[0034] Figure 8 is a schematic diagram of a terminal device according to an embodiment of this application;

[0035] Figure 9 is a schematic diagram of a network device according to an embodiment of this application. Detailed Implementation

[0036] Referring to the accompanying drawings, the foregoing and other features of this application will become apparent from the following description. Specific embodiments of this application are specifically disclosed in the description and drawings, illustrating partial implementations in which the principles of this application may be employed. It should be understood that this application is not limited to the described embodiments; rather, it includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0037] In the embodiments of this application, the terms "first," "second," etc., are used to distinguish different elements by name, but do not indicate the spatial arrangement or chronological order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one or more of the terms listed in association and all combinations thereof. The terms "comprising," "including," "having," etc., refer to the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0038] In the embodiments of this application, the singular forms "a," "the," etc., including the plural forms, should be broadly understood as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms, unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0039] In the embodiments of this application, the term "communication network" or "wireless communication network" may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE), LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), Ambient IoT, etc.

[0040] Furthermore, communication between devices in a communication system can be carried out according to communication protocols at any stage, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), future 6G, etc., and / or other currently known or future communication protocols.

[0041] In this application embodiment, the term "network device" refers, for example, to a device in a communication system that connects a terminal device to a communication network and provides services to that terminal device. Network devices may include, but are not limited to, devices such as: base stations (BS), access points (AP), transmission reception points (TRP), broadcast transmitters, mobile management entities (MME), gateways, servers, radio network controllers (RNC), base station controllers (BSC), etc. Furthermore, network devices may also include readers or interrogators used for AIoT, but this application is not limited to these devices.

[0042] Base stations can include, but are not limited to, devices such as NodeBs (or NBs), evolved NodeBs (eNodeBs or eNBs), and 5G base stations (gNBs), IAB hosts (Donors), etc. They can also include Remote Radio Heads (RRHs), Remote Radio Units (RRUs), relays or low-power nodes (e.g., femeto, pico, etc.), reders, or interrogators. The term "base station" can include some or all of their functions, and each base station can provide communication coverage to a specific geographic area. The term "cell" can refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0043] In the embodiments of this application, the terms "User Equipment" (UE) or "Terminal Equipment" (TE) refer, for example, to a device that accesses a communication network and receives network services through a network device. A terminal device can be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, subscriber station (SS), access terminal (AT), tag, etc.

[0044] Terminal devices may include, but are not limited to, the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptops, cordless phones, smartphones, smartwatches, digital cameras, tags, devices attached to or associated with items (e.g., for item management), etc.

[0045] For example, in scenarios such as the Internet of Things (IoT), terminal devices can also be machines or devices for monitoring or measurement, including but not limited to: machine-type communication (MTC) terminals, vehicle communication terminals, device-to-device (D2D) terminals, machine-to-machine (M2M) terminals, ambient IoT devices, etc.

[0046] Furthermore, the terms "network side" or "network equipment side" refer to one side of the network, which can be a base station or include one or more network devices as described above. The terms "user side," "terminal side," or "terminal equipment side" refer to the side of the user or terminal, which can be a UE or include one or more terminal devices as described above. Unless otherwise specified, "equipment" can refer to either network equipment or terminal equipment.

[0047] The following examples illustrate the scenarios of embodiments of this application, but this application is not limited thereto.

[0048] Figure 1 is a schematic diagram of a communication system according to an embodiment of this application, showing the case where the base station communicates directly with the AIoT device; Figure 2 is another schematic diagram of a communication system according to an embodiment of this application, showing the case where the base station communicates with the AIoT device through an intermediate node; Figure 3 is yet another schematic diagram of a communication system according to an embodiment of this application, showing the case where the base station communicates with the AIoT device with the assistance of an assisting node. Figures 1 to 3 schematically illustrate the cases using terminal devices and network devices as examples.

[0049] As shown in Figure 1, network devices can communicate directly with AIoT devices, sending signals directly to or receiving signals directly from AIoT devices. As shown in Figure 2, network devices can also use intermediate nodes to send signals to or receive signals from AIoT devices. As shown in Figure 3, network devices can also send signals to or receive signals from AIoT devices with the assistance of assisting nodes.

[0050] In this embodiment, the intermediate node can be a terminal device, a UE, or a network node, such as a relay, an IAB node, or a repeater, and this application is not limited thereto. The intermediate node has the function of communicating with the network device in Figure 2, and at least has the ability to send signals to and / or receive signals from the AIoT device. The auxiliary node can be a terminal device, a UE, or a network node, such as a relay, an IAB node, or a repeater, and this application is not limited thereto. The auxiliary node has the function of communicating with the network device in Figure 3, and at least has the ability to send signals to and / or receive signals from the AIoT device. The signals sent to and received from the AIoT device as described herein conform to the specifications and descriptions of AIoT devices in communication standard protocols.

[0051] In the embodiments of this application, the network device sending signals / information / configurations to the AIoT device, or the AIoT device receiving signals / information / configurations from the network device, can be done in several ways: the network device directly sends the signal to the AIoT device, which then receives it; the network device sends the signal to the AIoT device via an intermediate node, which then receives it; the network device sends the signal to the AIoT device with the assistance of an auxiliary node, which then receives it; or the network device sends the signal to the AIoT device through other methods, which then receives it. Unless otherwise specified, this application is not limited to these methods.

[0052] In the embodiments of this application, the AIoT device sending signals / information to the network device or the network device receiving signals / information from the AIoT device can be done in various ways: the AIoT device sends the signal and the network device receives it directly; the AIoT device sends the signal and the network device receives it via an intermediate node; the AIoT device sends the signal and the network device receives it with the help of an auxiliary node; or the AIoT device sends the signal and the network device receives it through other methods. Unless otherwise specified, this application is not limited to these methods.

[0053] The embodiments of this application will be described below with reference to the accompanying drawings and specific implementation details.

[0054] First aspect of the embodiments

[0055] This application provides a method for determining the chip duration of a device-to-reader (D2R) transmission, described from the perspective of a first device. The first device is, for example, a device, which may be a tag-type terminal device as shown in Figures 1 to 3. In this application embodiment, the second device is, for example, a reader, which may be a network device, terminal device, relay device, etc., with A-IoT capabilities, such as the network device shown in Figure 1, the intermediate node shown in Figure 2, or the auxiliary node shown in Figure 3.

[0056] Figure 4 is a schematic diagram of a method for determining the chip duration of D2R transmission according to an embodiment of this application. As shown in Figure 4, the method includes:

[0057] 410: The first device receives the first information sent by the second device, and sends D2R transmission to the second device according to the first information;

[0058] 420: The first device determines the chip duration of the aforementioned D2R transmission.

[0059] It is worth noting that Figure 4 above is only an illustrative description of the embodiments of this application, but this application is not limited thereto. For example, the execution order between various operations can be appropriately adjusted, and other operations can be added or some operations can be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description in Figure 4 above.

[0060] According to the above embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. By determining the D2R chip duration through control by the second device (reader), the reader can anticipate the D2R chip duration, eliminating the need for blind detection and facilitating the reader's reception and demodulation of the D2R transmission.

[0061] In some embodiments, the first device determines the chip duration of the D2R transmission, including at least one of the following:

[0062] Scenario 1: The first device determines the chip duration of the D2R transmission according to the predefined method of the protocol;

[0063] Scenario 2: The first device determines the chip duration of the D2R transmission based on the first information;

[0064] Scenario 3: The first device determines the chip duration of the D2R transmission based on the D2R transmission.

[0065] In scenario 1 above, the chip duration value T of the D2R transmission can be predefined in the protocol. The first device can determine the chip duration of the D2R transmission based on the predefined chip duration value T of the D2R transmission in the protocol.

[0066] The time unit of the aforementioned value T can be a second, millisecond, microsecond, or other time unit, or a symbol, time slot, subframe, or frame involved in NR, or an integer or fractional multiple of the R2D chip (R2D modulation chip) used for R2D transmission. The specific multiple can be a predefined default value in the protocol, and this application is not limited to this. Here, R2D transmission can be the aforementioned first information, R2D transmission corresponding to the aforementioned D2R transmission, paging messages, Msg0, Msg2, control information, etc.

[0067] The time unit for the value T mentioned above is only an example, and this application is not limited to it. The time unit for the value T may also be a new time unit specified in the agreement.

[0068] According to the above embodiments, there is no need to additionally indicate the D2R chip duration, thus reducing signaling overhead.

[0069] In scenario 2 above, the first device can determine the chip duration of the D2R transmission based on the first information received from the second device, wherein the first information can be at least one of the following:

[0070] The signal received by the first device from the R2D transmission of the second device;

[0071] The second information in the scheduling information received by the first device from the second device in the R2D transmission;

[0072] Information related to the reference chip duration in the R2D transmission received by the first device from the second device;

[0073] The length of the chip duration indicated in the R2D transmission received by the first device from the second device;

[0074] The index indicated in the R2D transmission received by the first device from the second device, which corresponds to at least one of the predefined or configured chip duration tables; and

[0075] The code indicated in the R2D transmission received by the first device from the second device corresponds to at least one of the predefined or configured chip duration codes.

[0076] In some possible implementations, the first device can determine the chip duration of the D2R transmission based on a signal in the R2D transmission. This signal includes, but is not limited to, at least one of the following: the preamble, midamble, and postamble in the R2D transmission. That is, the first device can determine the chip duration of the current D2R transmission based on the preamble and / or midamble and / or postamble of the previous R2D transmission.

[0077] For example, the start-indicator part or clock-acquisition part in the preamble (referred to as R2D preamble) of R2D transmission, or the preamble, midamble, or postamble (referred to as R2D preamble / midamble / postamble) of R2D transmission, indicates the chip duration of D2R transmission, and the first device determines the chip duration of D2R transmission accordingly.

[0078] In the above example, the start-indicator part or clock-acquisition part in the R2D preamble, or the code corresponding to the chip duration of the D2R transmission in the R2D preamble / midamble / postamble, can indicate the chip duration of the D2R transmission. The protocol can specify the correspondence between the chip duration of the D2R transmission and the above code.

[0079] Alternatively, the start-indicator part or clock-acquisition part in the R2D preamble, or the length of the high and low levels in the R2D preamble / midamble / postamble, can indicate the chip duration of the D2R transmission.

[0080] Alternatively, the start-indicator part or clock-acquisition part of the R2D preamble, or the R2D preamble / midamble / postamble, must contain at least two level transition edges. The time length between these level transition edges is either the chip duration of the D2R transmission or X times the chip duration of the D2R transmission. The value of X can be a default value predefined by the protocol, or a value indicated or configured by the second device to the first device. Furthermore, the value of X can be an integer greater than 0 or a decimal greater than 0.

[0081] For example, after the first device determines the chip duration of the R2D transmission based on the clock-acquisition part in the R2D preamble, it determines the chip duration of the D2R transmission based on the chip duration of the R2D transmission.

[0082] In the above example, the protocol may pre-define that the chip duration of D2R transmission is the same as that of R2D transmission; alternatively, the protocol may pre-define, or the second device may instruct or configure, for the first device, that the chip duration of the D2R transmission is X times the chip duration of the R2D transmission, or that the chip duration of the R2D transmission is X times the chip duration of the D2R transmission. The value of X can be a default value pre-defined by the protocol, or a value instructed or configured by the second device for the first device. Furthermore, the value of X can be an integer greater than 0 or a decimal greater than 0.

[0083] In the above example, the R2D transmission and the D2R transmission can be corresponding, that is, the D2R transmission is the response to the R2D transmission, or the R2D transmission is the trigger message for the D2R transmission.

[0084] In other possible implementations, the first device can determine the chip duration of the D2R transmission based on relevant information (referred to as second information) in the scheduling information for PDRCH during the R2D transmission. This second information includes, but is not limited to, at least one of the following: data rate, time resource, and transport block size (TB size, TBS). That is, the first device determines the chip duration of the D2R transmission based on information such as data rate, time resource, and TBS in the scheduling information of the R2D transmission.

[0085] For example, the first device determines the chip duration of the D2R transmission based on the data rate in the scheduling information of the R2D transmission. Alternatively, the second device can directly indicate the value of the data rate for the D2R transmission in the physical layer signaling or higher layer signaling. For example, if the data rate is X bit / s, the second device directly indicates the value of X, and the first device determines the chip duration of the D2R transmission based on the data rate value indicated by the second device. The unit of X mentioned above is just an example; the unit of X can also be other, such as Kb / s, etc.

[0086] For example, the first device determines the chip duration of the D2R transmission based on the data rate in the scheduling information of the R2D transmission. This could be a table of predefined data rate values ​​for D2R transmissions in the standard, containing multiple entries, each identified by an index. The second device indicates the corresponding data rate value by indicating the value of that index. Furthermore, this table can also include other information, such as TBS (Transmission Block Size), message type, device type, modulation scheme, etc.

[0087] For example, the first device determines the chip duration of the D2R transmission based on the time resource in the scheduling information of the R2D transmission. This can be achieved by the first device determining the chip duration of the D2R transmission based on the start or end, duration, or period of the time domain resource of the D2R transmission.

[0088] For example, the first device determines the chip duration of the D2R transmission based on the TBS (Bit Value Sequence) in the scheduling information of the R2D transmission. Alternatively, the second device can directly indicate the value of the TBS in the physical layer signaling or higher-layer signaling. For instance, if the value of the TBS is X bits, the second device directly indicates the value of X, and the first device determines the chip duration of the D2R transmission based on the TBS value indicated by the second device. The unit of X mentioned above is just an example; the unit of X can also be other, such as kilobytes (KB).

[0089] For example, the first device determines the chip duration of the D2R transmission based on the TBS (Track Size Spectrum) in the scheduling information of the R2D transmission. This could be a table of predefined TBS values ​​for D2R transmissions in the standard, containing multiple entries, each identified by an index. The second device indicates the corresponding TBS value by indicating the value of that index. Furthermore, the table can also include other information, such as data rate, message type, device type, modulation scheme, etc.

[0090] The above examples illustrate how the first device can determine the chip duration of the D2R transmission based on relevant information in the scheduling information during the R2D transmission. However, this application is not limited to these examples, and appropriate modifications can be made based on the above embodiments. For instance, the above embodiments can be used individually, or one or more of the above embodiments can be combined.

[0091] In some possible implementations, the first device can determine the chip duration of the D2R transmission based on information related to the reference chip duration. This reference chip duration can be the chip duration of the R2D transmission received by the first device from the second device. The R2D transmission can be an R2D transmission corresponding to the aforementioned D2R transmission, or a paging message (e.g., a paging message or subsequent paging message) sent by the second device, or Msg0 sent by the second device, or Msg2 sent by the second device, or R2D control information sent by the second device (e.g., transmitted via L1 or a higher layer), etc. That is, the reference chip duration can be the chip duration of the R2D transmission corresponding to the D2R transmission, or an A-IoT paging message, or Msg0, or Msg2, or a subsequent A-IoT paging message or R2D control information.

[0092] In this D2R transmission, the chip duration can be the same as the reference chip duration, or the chip duration can be X times the reference chip duration, where X can be an integer greater than 0 or a decimal greater than 0. Furthermore, the value of X can be a default value predefined by the protocol, or a value indicated or configured to the first device by the second device. Additionally, the value of X can be an integer greater than 0 or a decimal greater than 0.

[0093] Furthermore, the R2D transmission here (i.e., the R2D transmission that provides the aforementioned reference chip duration) can be instructed or configured by the second device to the first device, or it can be predetermined in the protocol, and this application does not impose any restrictions on it.

[0094] For example, the second device instructs the first device that the R2D transmission providing the reference chip duration is the R2D transmission corresponding to the D2R transmission, or the A-IoT paging message, or Msg0, or Msg2, or the subsequent A-IoT paging message, or R2D control information, etc.

[0095] In one possible implementation, the second device indicates, via a 1-bit information, that the chip duration of a certain R2D transmission is a reference chip duration for determining the chip duration of a D2R transmission. For example, when the information bit is "0", the R2D transmission is not a reference chip duration for the chip duration of the aforementioned D2R transmission; when the information bit is "1", the R2D transmission is a reference chip duration for the chip duration of the aforementioned D2R transmission.

[0096] In another possible implementation, the second device can directly indicate the type of R2D transfer that provides the reference chip duration in the physical layer or higher-level control information.

[0097] For example, the protocol may pre-define that the R2D transmission providing the reference chip duration is a certain type of R2D message, such as an A-IoT paging message, Msg0, Msg2, a subsequent A-IoT paging message, or R2D control information.

[0098] The aforementioned A-IoT paging message and subsequent A-IoT paging messages refer to the R2D message that triggers random access for A-IoT devices at the beginning of a certain inventory round. The aforementioned Msg0 is a message sent by the reader to the A-IoT device during the random access process to determine the transmission resources of Msg1. The aforementioned Msg2 is a message sent by the reader to the device during the random access process to respond to Msg1. For details, please refer to the relevant technologies, which will not be elaborated here.

[0099] The above examples illustrate the reference chip duration and the R2D transmission that provides the reference chip duration, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0100] The following example illustrates the updating of reference chip duration and its effective time range.

[0101] In some embodiments, a first device receives a first R2D transmission, determines a first reference chip duration based on the first R2D transmission, and then determines a reference chip duration for a D2R transmission sent within a first time range based on the first reference chip duration. This first time range may be indicated or configured to the first device by a second device, or it may be determined by the first device through a protocol-defined method. After determining the reference chip duration for the D2R transmission in the above manner, the first device can determine the chip duration for the D2R transmission based on information related to the determined reference chip duration, for example, using the first reference chip duration as the chip duration for the D2R transmission. This application is not limited to this.

[0102] In other embodiments, the first device receives a first R2D transmission at a first time point, determines a first reference chip duration based on the first R2D transmission, and determines a reference chip duration for a D2R transmission based on the first reference chip duration within a second time range starting at a second time point; furthermore, the first device receives a second R2D transmission at a third time point, determines a second reference chip duration based on the second R2D transmission, and determines a reference chip duration for a D2R transmission based on the second reference chip duration within a third time range starting at a fourth time point.

[0103] In the above example, the first R2D transmission is, for example, an indication of the reference chip duration, and the second R2D transmission is, for example, an update indication of the reference chip duration. That is, the second device first indicates the reference chip duration through the first R2D transmission, and then indicates the update of the reference chip duration through the second R2D transmission. Through this method, the first device not only determines the reference chip duration of the D2R transmission, but also determines when to update the reference chip duration. Therefore, the first device can determine the chip duration of the D2R transmission based on information related to the determined or updated reference chip duration, for example, using the determined or updated reference chip duration as the chip duration of the D2R transmission. This application is not limited to this. The signaling carrying the indication of the reference chip duration and the signaling carrying the update indication of the reference chip duration can be the same or different; this application does not impose any restrictions on this.

[0104] In the above example, both the first R2D transmission and the second R2D transmission can be reference chip duration indication information. That is, the second device first indicates the reference chip duration through the first R2D transmission, and then indicates the reference chip duration through the second R2D transmission. The first device determines the chip duration of the D2R transmission based on the indication from the second device, for example, using the reference chip duration indicated by the second device as the chip duration of the D2R transmission. This application is not limited to this. The signaling carrying the reference chip duration indication information corresponding to the first R2D transmission and the signaling carrying the reference chip duration indication information corresponding to the second R2D transmission can be the same or different; this application does not impose any restrictions on this.

[0105] In the above example, the first reference chip duration and the second reference chip duration can be the same or different, and this application does not impose any restrictions on this.

[0106] In the above example, the first time point and the third time point can be the same or different. That is, the first device can simultaneously receive the first R2D transmission (reference chip duration indication information) and the second R2D transmission (reference chip duration indication information or reference chip duration update indication information). In addition, the second time point and the fourth time point can be the same or different. That is, the first device can determine the reference chip duration of the D2R transmission based on the determined reference chip duration within the time range starting from the same time point.

[0107] In some embodiments, the first device receives an update indication information for the reference chip duration from the second device. This update indication information includes information about the second R2D transmission and the valid time resource for the second reference chip duration. The first device determines the reference chip duration for the D2R transmission sent within that valid time resource based on the reference chip duration. In this way, the first device can determine the chip duration of the D2R transmission based on the determined reference chip duration, for example, by using the determined reference chip duration as the chip duration of the D2R transmission. This application is not limited to this.

[0108] The above examples illustrate the updating of the reference chip duration and its effective time range, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined. In addition, the above reference chip duration is used to determine the chip duration of the corresponding D2R transmission, and this application does not limit its name; for example, it can also be called "reference R2D chip duration," etc.

[0109] In some other possible implementations, the first device can determine the chip duration of the D2R transmission based on the chip duration indicated by the R2D transmission.

[0110] For example, the scheduling information in R2D transmission indicates that the chip duration is X time units. Based on this indication, the first device can determine that the chip duration of D2R transmission is X time units.

[0111] In the example above, the X time units can be a value of X directly indicated by the second device, an index corresponding to that value of X indicated by the second device, or a value of X configured by the second device for the first device, and so on. The index can be predefined in a standard; for example, a standard could predefine a table containing multiple entries, each entry corresponding to a value of X, and identified by an index. The second device indicates the value of X corresponding to a given index in the table.

[0112] In the example above, the definition of the time unit has already been explained, and its content has been incorporated here, so it will not be repeated here.

[0113] In some other possible implementations, the first device can determine the chip duration of the D2R transmission based on the index indicated by the R2D transmission.

[0114] For example, the protocol specifies a table corresponding to chip duration, or the second device configures this table for the first device. This table includes multiple entries, each identified by an index. In addition to chip duration, each entry may include one or more of the following information: data rate, modulation, TBS, etc. The second device indicates the chip duration of the D2R transmission by indicating the corresponding index in the table. The first device determines the chip duration of the D2R transmission based on the index indicated by the second device and the aforementioned table. This is just an example; the table may also only include chip duration information.

[0115] In some other possible implementations, the first device can determine the chip duration of the D2R transmission based on the code indicated by the R2D transmission.

[0116] For example, the protocol may specify the corresponding code information for chip duration, or the second device may configure the aforementioned code information for the first device. The second device indicates the D2R chip duration by indicating the code, and the first device determines the chip duration of the D2R transmission based on the code indicated by the second device. The above is just an example; the information corresponding to the chip duration code may also include one or more of the following: data rate, modulation, TBS, etc.

[0117] In the foregoing embodiments, the first device has been provided as an example of determining the chip duration of D2R transmission based on the first information. The first information may be carried by physical layer signaling or by higher layer signaling, and this application does not limit it.

[0118] Furthermore, the above embodiments provide illustrative examples of the first device determining the chip duration of D2R transmission based on the first information. However, this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used individually, or one or more of the above embodiments can be combined.

[0119] In scenario 3 above, the first device can determine the chip duration of a D2R transmission based on the D2R transmission, wherein the D2R transmission includes a first D2R transmission and / or a second D2R transmission; the first D2R transmission includes at least information for determining the chip duration of the first D2R transmission, or the first D2R transmission includes information for determining the chip duration of the second D2R transmission; the first device determines the chip duration of the first D2R transmission or determines the chip duration of the second D2R transmission based on the first D2R transmission.

[0120] For example, the first device determines the chip duration of the D2R transmission based on the transmitted D2R transmission.

[0121] In the example above, the first device, for example, sends a first D2R transmission and determines the chip duration of the first D2R transmission based on information contained in the preamble and / or midamble and / or postamble in the first D2R transmission, or based on the transmission type of the first D2R transmission, or based on information related to the chip duration in the first D2R transmission.

[0122] The determination of the chip duration of the first D2R transmission based on the information contained in the preamble and / or midamble and / or postamble in the first D2R transmission has been explained above and its content is incorporated here, so it will not be repeated here.

[0123] Furthermore, regarding determining the chip duration of the first D2R transmission based on its transmission type, for example, the protocol pre-defines the chip duration corresponding to different D2R transmission types, and the first device determines the chip duration of the first D2R transmission based on its transmission type. For instance, if the D2R transmission transmits Msg1, the chip duration is X1 time units; if the D2R transmission transmits Msg3 or other D2R data, the chip duration is X2 time units. X1 and X2 can be the same or different. The concept of time units has already been explained above and is incorporated here; it will not be repeated here.

[0124] In addition, the determination of the chip duration of the first D2R transmission based on chip duration-related information in the first D2R transmission has been explained above and its content has been incorporated here, so it will not be repeated here.

[0125] For example, the first device determines the chip duration of the second D2R transmission to be transmitted based on the first D2R transmission transmitted.

[0126] In the example above, the first device, for instance, sends a first D2R transmission and a second D2R transmission, wherein the first D2R transmission indicates the chip duration of the second D2R transmission, or the chip duration of the first D2R transmission serves as a reference chip duration for determining the chip duration of the second D2R transmission. Thus, the first device can determine the chip duration of the second D2R transmission based on the first D2R transmission.

[0127] In the above example, in some possible implementations, the first D2R transmission can indicate the chip duration of the second D2R transmission. The specific indication method has been described in the previous embodiments. For example, it can be implemented by direct indication, or by table or predefined method, etc., and will not be repeated here.

[0128] In the above example, in some other possible implementations, the chip duration of the first D2R transmission can be used as a reference chip duration for the chip duration of the second D2R transmission. The specific reference method has been described in the previous embodiments and will not be repeated here.

[0129] In the above implementation, the first D2R transmission can be a Msg1 or Msg3 or D2R data sent before the second D2R transmission, such as the Msg1 or Msg3 or D2R data closest to the second D2R transmission. This application does not limit this.

[0130] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0131] According to the above embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. By determining the D2R chip duration through control by the second device (reader), the reader can anticipate the D2R chip duration, eliminating the need for blind detection and facilitating the reader's reception and demodulation of the D2R transmission.

[0132] Second aspect of the embodiments

[0133] This application provides a method for determining the chip duration of D2R transmission, described from the perspective of a second device. The second device can be the aforementioned network device, intermediate node, or auxiliary node. The embodiments of the second aspect can be combined with the embodiments of the first aspect, and the contents that are the same as those in the embodiments of the first aspect will not be repeated.

[0134] Figure 5 is a schematic diagram of a method for determining the chip duration of D2R transmission according to an embodiment of this application. As shown in Figure 5, the method includes:

[0135] 510: The second device sends first information to the first device, which is used by the first device to determine the chip duration of the D2R transmission;

[0136] 520: The second device receives the D2R transmission sent by the first device based on the first information.

[0137] It is worth noting that Figure 5 above is only an illustrative description of the embodiments of this application, but this application is not limited thereto. For example, the execution order between various operations can be appropriately adjusted, and other operations can be added or some operations can be removed. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description in Figure 5 above.

[0138] According to the above embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. By determining the D2R chip duration through control by the second device (reader), the reader can anticipate the D2R chip duration, eliminating the need for blind detection and facilitating the reader's reception and demodulation of the D2R transmission.

[0139] In some embodiments, the first information includes at least one of the following:

[0140] Signals transmitted from the second device to the first device during R2D transmission;

[0141] The second information in the scheduling information of the R2D transmission sent by the second device to the first device;

[0142] Information related to the reference chip duration in the R2D transmission sent from the second device to the first device;

[0143] The length of the chip duration indicated in the R2D transmission sent by the second device to the first device;

[0144] The index indicated in the R2D transmission sent by the second device to the first device, which corresponds to at least one of the predefined or configured chip duration tables; and

[0145] The code indicated in the R2D transmission sent by the second device to the first device corresponds to at least one of the predefined or configured chip duration codes.

[0146] In the above embodiments, the signals in R2D transmission include, but are not limited to, at least one of the following: preamble in R2D transmission, intermembrane in R2D transmission, and postamble in R2D transmission.

[0147] In the above embodiments, the second information in the scheduling information of R2D transmission includes, but is not limited to, at least one of the following: data rate, time resources, and transport block size in the scheduling information of R2D transmission.

[0148] In the above embodiments, the reference chip duration may be the chip duration of the R2D transmission or paging message or Msg0 or Msg2 or R2D control information corresponding to the D2R transmission.

[0149] In the above embodiments, the R2D transmission providing the reference chip duration may be indicated or configured by the second device to the first device, or may be pre-defined in the protocol.

[0150] In some embodiments, the second device sends a first R2D transmission to the first device, the first device determines a first reference chip duration based on the first R2D transmission, and determines a reference chip duration for D2R transmissions sent within a first time range based on the first reference chip duration.

[0151] In the above embodiments, the first time range may be indicated by the second device to the first device, or it may be determined by the first device in a manner specified by the protocol.

[0152] In other embodiments, the second device sends a first R2D transmission to the first device at a first time point, the first device determines a first reference chip duration based on the first R2D transmission, and determines a reference chip duration for D2R transmission based on the first reference chip duration within a second time range starting from a second time point.

[0153] In the above embodiment, the second device also sends a second R2D transmission to the first device at a third time point. The first device determines a second reference chip duration based on the second R2D transmission and determines the reference chip duration of the D24 transmission based on the second reference chip duration within a third time range starting from a fourth time point.

[0154] In the above embodiments, the first R2D transmission may be reference chip duration indication information, and the second R2D transmission may be reference chip duration update indication information; the signaling carrying reference chip duration indication information and the signaling carrying reference chip duration update indication information may be the same or different.

[0155] Alternatively, in the above embodiments, both the first R2D transmission and the second R2D transmission are reference chip duration indication information; the signaling carrying the reference chip duration indication information corresponding to the first R2D transmission and the signaling carrying the reference chip duration indication information corresponding to the second R2D transmission can be the same or different.

[0156] In the above embodiments, the first reference chip duration and the second reference chip duration may be the same or different.

[0157] In the above embodiments, the first time point and the second time point may be the same or different, and the second time point and the fourth time point may be the same or different.

[0158] In some other embodiments, the second device sends an update indication information for the reference chip duration to the first device. The update indication information includes information about the second R2D transmission and the effective time resources for the second reference chip duration. The first device determines the reference chip duration for the D2R transmission to be transmitted within the effective time resources based on the reference chip duration.

[0159] In the embodiments of this application, the first information can be carried by physical layer signaling or by higher layer signaling.

[0160] The above provides an exemplary description of how the first device determines the chip duration of the D2R transmission based on the first information. In addition, the first device may also determine the chip duration of the D2R transmission according to a predefined method of the protocol, or the first device may also determine the chip duration of the D2R transmission based on the D2R transmission itself. The specific details have been described in the embodiments of the first aspect and will not be repeated here.

[0161] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0162] According to the above embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. By determining the D2R chip duration through control by the second device (reader), the reader can anticipate the D2R chip duration, eliminating the need for blind detection and facilitating the reader's reception and demodulation of the D2R transmission.

[0163] Third aspect of the embodiments

[0164] This application provides an apparatus for determining the chip duration of D2R transmission. This apparatus may be, for example, a first device, or one or more components or parts configured within the first device. The first device may be, for example, a tag-type terminal device, and the same content as in the first aspect of the embodiment will not be repeated.

[0165] Figure 6 is a schematic diagram of a chip duration determination device for D2R transmission according to an embodiment of this application. As shown in Figure 6, the chip duration determination device 600 for D2R transmission according to an embodiment of this application includes:

[0166] The receiving unit 610 receives the first information sent by the second device;

[0167] The transmitting unit 620 transmits D2R data to the second device based on the first information.

[0168] Processing unit 630 determines the chip duration of the D2R transmission.

[0169] In some embodiments, the processing unit 630 determines the chip duration of the D2R transmission, including:

[0170] Determine the chip duration of the D2R transmission based on the first information, and / or,

[0171] The chip duration of the D2R transmission is determined according to a predefined method in the protocol, and / or,

[0172] The chip duration of the D2R transmission is determined based on the D2R transmission.

[0173] In some embodiments, the processing unit 630 determines the chip duration of the D2R transmission according to a predefined method in the protocol, such as: the processing unit 630 determines the chip duration of the D2R transmission according to the value T of the predefined chip duration of the D2R transmission in the protocol.

[0174] The time unit of the above value T can be at least one of the following: second, millisecond, microsecond; symbol, time slot, subframe, frame; an integer or fractional multiple of the R2D slice of a reader-to-device (R2D) transmission.

[0175] The aforementioned R2D transmission may be at least one of the following: the aforementioned first information, the R2D transmission corresponding to the aforementioned D2R transmission, a paging message, message 0 (Msg0), message 2 (Msg2), or control information.

[0176] In some embodiments, the processing unit 630 determines the chip duration of the D2R transmission based on first information, for example including: the processing unit 630 determines the chip duration of the D2R transmission based on at least one of the following first information:

[0177] The receiving unit 610 receives the signal from the R2D transmission of the second device;

[0178] The receiving unit 610 receives the second information from the scheduling information in the R2D transmission from the second device;

[0179] Information related to the reference chip duration in the R2D transmission received by the receiving unit 610 from the second device;

[0180] The length of the chip duration indicated in the R2D transmission from the second device received by the receiving unit 610;

[0181] The receiving unit 610 receives the index indicated in the R2D transmission from the second device, which corresponds to at least one of the predefined or configured chip duration tables; and

[0182] The receiving unit 610 receives a code indicated in the R2D transmission from the second device, which corresponds to at least one of the predefined or configured chip duration codes.

[0183] The signals in the R2D transmission described above may include, but are not limited to, at least one of the following: the preamble in the R2D transmission, the intermembrane in the R2D transmission, and the postamble in the R2D transmission.

[0184] The second information in the scheduling information of the aforementioned R2D transmission may include, for example, at least one of the following: data rate, time resources, and transmission block size in the scheduling information of the R2D transmission.

[0185] The aforementioned reference chip duration can be the chip duration of an R2D transmission, paging message, Msg0, Msg2, or R2D control information corresponding to the aforementioned D2R transmission.

[0186] The R2D transmission providing the aforementioned reference chip duration can be indicated or configured by the second device to the first device, or it can be pre-defined in the protocol.

[0187] In some embodiments, the receiving unit 610 receives a first R2D transmission, and the processing unit 630 determines a first reference chip duration based on the first R2D transmission, and determines the reference chip duration of the D2R transmission sent within a first time range based on the first reference chip duration.

[0188] In the above embodiments, the first time range may be indicated to the first device by the second device, for example, received by the receiving unit 610 from the second device; or it may be determined by the first device in a manner specified by a protocol, for example, determined by the processing unit 630.

[0189] In other embodiments, the receiving unit 610 receives a first R2D transmission at a first time point, and the processing unit 630 determines a first reference chip duration based on the first R2D transmission, and determines a reference chip duration for D2R transmission based on the first reference chip duration within a second time range starting from a second time point; furthermore, the receiving unit 610 receives a second R2D transmission at a third time point, and the processing unit 630 determines a second reference chip duration based on the second R2D transmission, and determines a reference chip duration for D2R transmission based on the second reference chip duration within a third time range starting from a fourth time point.

[0190] In the above embodiments, in some possible implementations, the first R2D transmission is reference chip duration indication information, and the second R2D transmission is reference chip duration update indication information; the signaling carrying the reference chip duration indication information and the signaling carrying the reference chip duration update indication information may be the same or different.

[0191] In the above embodiments, in some other possible implementations, the first R2D transmission and the second R2D transmission are reference chip duration indication information; the signaling carrying the reference chip duration indication information corresponding to the first R2D transmission and the signaling carrying the reference chip duration indication information corresponding to the second R2D transmission are the same or different.

[0192] In the above embodiments, the first reference chip duration and the second reference chip duration can be the same or different.

[0193] In the above embodiments, the first time point and the third time point may be the same or different, and the second time point and the fourth time point may be the same or different.

[0194] In some other embodiments, the receiving unit 610 receives update indication information of the reference chip duration from the second device, the update indication information including information of the second R2D transmission and the effective time resources of the second reference chip duration; the processing unit 630 determines the reference chip duration of the D2R transmission sent in the above-mentioned effective time resources based on the reference chip duration.

[0195] In the aforementioned embodiments, the first information can be carried by physical layer signaling or by higher layer signaling.

[0196] In some embodiments, the processing unit 630 determines the slice duration of the D2R transmission based on the D2R transmission, including:

[0197] The aforementioned D2R transmission includes a first D2R transmission and / or a second D2R transmission; the first D2R transmission includes at least information for determining the slice duration of the first D2R transmission, or the first D2R transmission includes information for determining the slice duration of the second D2R transmission; the processing unit 630 determines the slice duration of the first D2R transmission or determines the slice duration of the second D2R transmission based on the aforementioned first D2R transmission.

[0198] For example, the sending unit 620 sends a first D2R transmission; the processing unit 630 determines the slice duration of the first D2R transmission based on the information contained in the preamble, and / or intermezzoid, and / or postamble in the first D2R transmission, or based on the transmission type of the first D2R transmission, or based on information related to the slice duration in the first D2R transmission.

[0199] For example, the sending unit 620 sends a first D2R transmission and a second D2R transmission; the first D2R transmission indicates the slice duration of the second D2R transmission; or, the slice duration of the first D2R transmission is used as a reference slice duration for determining the slice duration of the second D2R transmission; the processing unit 630 determines the slice duration of the second D2R transmission based on the first D2R transmission.

[0200] In this embodiment of the application, the processing unit 630 also controls the operation of the receiving unit 610 and the sending unit 620.

[0201] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0202] It is worth noting that the above description only covers the components or modules relevant to this application, but this application is not limited thereto. The chip duration determination device 600 for D2R transmission may also include other components or modules, and for details regarding these components or modules, please refer to related technologies.

[0203] Furthermore, for simplicity, Figure 6 only illustrates the connection relationships or signal flow between the various components or modules, but those skilled in the art should understand that various related technologies such as bus connections can be used. The aforementioned components or modules can be implemented using hardware facilities such as processors, memory, transmitters, and receivers; this application does not limit this implementation.

[0204] According to the above embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. By determining the D2R chip duration through control by the second device (reader), the reader can anticipate the D2R chip duration, eliminating the need for blind detection and facilitating the reader's reception and demodulation of the D2R transmission.

[0205] Fourth aspect of the embodiment

[0206] This application provides a device for determining the chip duration of a D2R transmission. This device may be, for example, a second device, or one or more components or parts configured within the second device. The second device may be the aforementioned network device, intermediate node, or auxiliary node. Contents identical to those in the embodiments of the first to third aspects will not be repeated.

[0207] Figure 7 is a schematic diagram of a chip duration determination device for D2R transmission according to an embodiment of this application. As shown in Figure 7, the chip duration determination device 700 for D2R transmission includes:

[0208] The transmitting unit 710 sends first information to the first device, which is used by the first device to determine the chip duration of the D2R transmission;

[0209] The receiving unit 720 receives the D2R transmission sent by the first device according to the first information.

[0210] In some embodiments, the first information includes at least one of the following:

[0211] The signal in R2D transmission sent by the transmitting unit 710 to the first device;

[0212] The second information in the scheduling information of the R2D transmission sent by the sending unit 710 to the first device;

[0213] Information related to the reference chip duration in the R2D transmission sent by the transmitting unit 710 to the first device;

[0214] The length of the chip duration indicated in the R2D transmission sent by the transmitting unit 710 to the first device;

[0215] The index indicated in the R2D transmission sent by the transmitting unit 710 to the first device corresponds to at least one of the predefined or configured chip duration tables; and

[0216] The code indicated in the R2D transmission sent by the sending unit 710 to the first device corresponds to at least one of the predefined or configured chip duration codes.

[0217] In the above embodiments, the signals in R2D transmission include, but are not limited to, at least one of the following: preamble in R2D transmission, intermembrane in R2D transmission, and postamble in R2D transmission.

[0218] In the above embodiments, the second information in the scheduling information of R2D transmission includes, but is not limited to, at least one of the following: data rate, time resources, and transport block size in the scheduling information of R2D transmission.

[0219] In the above embodiments, the reference chip duration may be the chip duration of the R2D transmission or paging message or Msg0 or Msg2 or R2D control information corresponding to the D2R transmission.

[0220] In the above embodiments, the R2D transmission providing the reference chip duration can be indicated or configured by the second device to the first device, for example, by the sending unit 710, or pre-defined in the protocol.

[0221] In some embodiments, the transmitting unit 710 transmits a first R2D transmission to a first device, the first device determines a first reference chip duration based on the first R2D transmission, and determines a reference chip duration for D2R transmissions transmitted within a first time range based on the first reference chip duration.

[0222] In the above embodiments, the first time range may be indicated by the second device to the first device, for example, by the sending unit 710, or it may be determined by the first device in a manner specified by the protocol.

[0223] In other embodiments, the sending unit 710 sends a first R2D transmission to the first device at a first time point, the first device determines a first reference chip duration based on the first R2D transmission, and determines a reference chip duration for D2R transmission based on the first reference chip duration within a second time range starting at a second time point.

[0224] In the above embodiment, the sending unit 710 also sends a second R2D transmission to the first device at a third time point. The first device determines a second reference chip duration based on the second R2D transmission and determines the reference chip duration of the D24 transmission based on the second reference chip duration within a third time range starting from a fourth time point.

[0225] In the above embodiments, the first R2D transmission may be reference chip duration indication information, and the second R2D transmission may be reference chip duration update indication information; the signaling carrying reference chip duration indication information and the signaling carrying reference chip duration update indication information may be the same or different.

[0226] Alternatively, in the above embodiments, both the first R2D transmission and the second R2D transmission are reference chip duration indication information; the signaling carrying the reference chip duration indication information corresponding to the first R2D transmission and the signaling carrying the reference chip duration indication information corresponding to the second R2D transmission can be the same or different.

[0227] In the above embodiments, the first reference chip duration and the second reference chip duration may be the same or different.

[0228] In the above embodiments, the first time point and the second time point may be the same or different, and the second time point and the fourth time point may be the same or different.

[0229] In some other embodiments, the sending unit 710 sends an update indication information of the reference chip duration to the first device. The update indication information includes information of the second R2D transmission and the effective time resources of the second reference chip duration. The first device determines the reference chip duration of the D2R transmission to be sent in the effective time resources based on the reference chip duration.

[0230] In the embodiments of this application, the first information can be carried by physical layer signaling or by higher layer signaling.

[0231] In this embodiment of the application, as shown in FIG7, the device 700 further includes a processing unit 730, which controls the operation of the receiving unit 720 and the transmitting unit 710.

[0232] The above embodiments are merely illustrative examples of embodiments of this application, but this application is not limited thereto, and appropriate modifications can be made based on the above embodiments. For example, the above embodiments can be used alone, or one or more of the above embodiments can be combined.

[0233] It is worth noting that the above description only covers the components or modules relevant to this application, but this application is not limited thereto. The chip duration determination device 700 for D2R transmission may also include other components or modules, and for details regarding these components or modules, please refer to related technologies.

[0234] Furthermore, for simplicity, Figure 7 only illustrates the connection relationships or signal flow between the various components or modules, but those skilled in the art should understand that various related technologies such as bus connections can be used. The aforementioned components or modules can be implemented using hardware facilities such as processors, memory, transmitters, and receivers; this application does not limit this implementation.

[0235] According to the above embodiments, the first device can determine the length of the D2R chip duration for D2R transmission. By determining the D2R chip duration through control by the second device (reader), the reader can anticipate the D2R chip duration, eliminating the need for blind detection and facilitating the reader's reception and demodulation of the D2R transmission.

[0236] Fifth aspect of the embodiment

[0237] This application also provides a communication system, which can be referred to in Figures 1 to 3. The contents that are the same as those in the embodiments of the first to fourth aspects will not be repeated.

[0238] In some embodiments, the communication system 100 may include at least a first device and a second device. The first device may be, for example, a tag-type terminal device in the scenarios of Figures 1 to 3, and the second device may be, for example, a network device in the scenarios of Figures 1 to 3, an intermediate node in the scenario of Figure 2, or an auxiliary node in the scenario of Figure 3.

[0239] The relevant content regarding the first and second devices has been described in the embodiments of the first to fourth aspects, and its content is incorporated herein by reference and will not be repeated here.

[0240] This application also provides a terminal device, but the application is not limited to this and may also include other devices.

[0241] Figure 8 is a schematic diagram of a terminal device according to an embodiment of this application. As shown in Figure 8, the terminal device 800 may include a processor 810 and a memory 820; for example, the memory 820 stores data and programs and is coupled to the processor 810. It is worth noting that this figure is exemplary; other types of structures may also be used to supplement or replace this structure to implement telecommunications functions or other functions.

[0242] For example, processor 810 may be configured to execute a program to implement the methods described in the embodiments of the first or second aspect.

[0243] As shown in Figure 8, the terminal device 800 may further include a communication module 830; it may or may not have a power supply. It is worth noting that the terminal device 800 is not necessarily required to include all the components shown in Figure 8; these components are not essential. Furthermore, the terminal device 800 may also include components not shown in Figure 8, which can be found in existing technologies.

[0244] This application also provides a network device, such as a base station, but this application is not limited to this and may also include other network devices.

[0245] Figure 9 is a schematic diagram of the network device according to an embodiment of this application. As shown in Figure 9, the network device 900 may include: a processor 910 (e.g., a central processing unit CPU) and a memory 920; the memory 920 is coupled to the processor 910. The memory 920 can store various data; in addition, it also stores an information processing program 930, and executes the program 930 under the control of the processor 910.

[0246] For example, processor 910 can be configured to execute a program to implement the method described in the embodiments of the second aspect.

[0247] In addition, as shown in Figure 9, the network device 900 may also include a transceiver 940 and an antenna 950, etc.; the functions of the above components are similar to those in the prior art, and will not be described in detail here. It is worth noting that the network device 900 does not necessarily have to include all the components shown in Figure 9; in addition, the network device 900 may also include components not shown in Figure 9, which can be referred to in the prior art.

[0248] This application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to perform the method described in the embodiments of the first or second aspect.

[0249] This application also provides a storage medium storing a computer program, wherein the computer program causes a terminal device to perform the methods described in the embodiments of the first or second aspect.

[0250] This application also provides a computer program, wherein when the program is executed in a network device, the program causes the network device to perform the method described in the second aspect of the embodiment.

[0251] This application also provides a storage medium storing a computer program, wherein the computer program causes a network device to perform the method described in the second aspect of the embodiment.

[0252] The apparatus and methods described above in this application can be implemented in hardware or in combination with software. This application relates to a computer-readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to implement the various methods or steps described above. This application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, etc.

[0253] The methods / apparatus described in conjunction with the embodiments of this application can be directly embodied in hardware, software modules executed by a processor, or a combination of both. For example, one or more and / or combinations of one or more functional block diagrams shown in the figures can correspond to various software modules in a computer program flow, or to various hardware modules. These software modules can correspond to the various steps shown in the figures, respectively. These hardware modules can be implemented, for example, using a field-programmable gate array (FPGA) to embed these software modules.

[0254] The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor, enabling the processor to read information from and write information to the storage medium; or the storage medium can be an integral part of the processor. The processor and storage medium can reside in an ASIC. The software module can be stored in the memory of a mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a high-capacity MEGA-SIM card or a high-capacity flash memory device, the software module can be stored in the MEGA-SIM card or the high-capacity flash memory device.

[0255] One or more and / or one or more combinations of functional blocks described in the accompanying drawings can be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof for performing the functions described herein. One or more and / or one or more combinations of functional blocks described in the accompanying drawings can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0256] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on its spirit and principles, and these modifications and variations are also within the scope of the present application.

[0257] Regarding the implementation methods including the above embodiments, the following notes are also disclosed:

[0258] 1. A method for determining the chip duration of a D2R transmission, applied to a first device, wherein the method comprises:

[0259] The first device receives the first information sent by the second device, and sends a D2R transmission to the second device based on the first information.

[0260] The first device determines the chip duration of the D2R transmission.

[0261] 2. A method for determining the chip duration of a D2R transmission, applied to a second device, wherein the method includes:

[0262] The second device sends the first information to the first device;

[0263] The second device receives the D2R transmission sent by the first device based on the first information, and the first device determines the chip duration of the D2R transmission.

[0264] 3. A terminal device comprising a memory and a processor, the memory storing a computer program and the processor being configured to execute the computer program to implement the method as described in Appendix 1 or Appendix 2.

[0265] 4. A network device comprising a memory and a processor, the memory storing a computer program and the processor being configured to execute the computer program to implement the method as described in Appendix 2.

[0266] 5. A computer program product comprising at least a computer program that, when executed by a processor, causes a terminal device to perform the method as described in Appendix 1 or Appendix 2.

[0267] 6. A computer program product comprising at least a computer program that, when executed by a processor, causes a network device to perform the method as described in Appendix 2.

[0268] 7. A communication system comprising the terminal equipment described in Appendix 3 and / or the network equipment described in Appendix 4.

Claims

1. A device for determining the chip duration in a device-to-reader (D2R) transfer, configured in a first device, wherein, The device includes: A receiving unit that receives the first information sent by the second device; The sending unit sends a D2R transmission to the second device based on the first information. The processing unit determines the chip duration of the D2R transmission.

2. The apparatus according to claim 1, wherein, The processing unit determines the chip duration of the D2R transmission, including: The processing unit determines the chip duration of the D2R transmission based on the first information, and / or, The processing unit determines the chip duration of the D2R transmission according to a predefined protocol method, and / or, The processing unit determines the chip duration of the D2R transmission based on the D2R transmission.

3. The apparatus according to claim 2, wherein, The processing unit determines the chip duration of the D2R transmission according to a predefined protocol method, including: The processing unit determines the chip duration of the D2R transmission based on the chip duration value T predefined in the protocol.

4. The apparatus according to claim 3, wherein, The time unit of the value T is at least one of the following: Seconds, milliseconds, microseconds; Symbol, time slot, subframe, frame; The number of integer or fractional multiples of the R2D slices transferred from reader to device (R2D).

5. The apparatus according to claim 4, wherein, The R2D transmission is at least one of the following: the first information, the R2D transmission corresponding to the D2R transmission, the paging message, message 0 (Msg0), message 2 (Msg2), and control information.

6. The apparatus according to claim 2, wherein, The processing unit determines the chip duration of the D2R transmission based on the first information, including: The processing unit determines the chip duration of the D2R transmission based on at least one of the following first pieces of information: The receiving unit receives the signal from the R2D transmission of the second device; The receiving unit receives the second information from the scheduling information in the R2D transmission from the second device; Information related to the reference chip duration in the R2D transmission received by the receiving unit from the second device; The length of the chip duration indicated in the R2D transmission from the second device received by the receiving unit; The receiving unit receives an index indicated in the R2D transmission from the second device, the index corresponding to at least one of a predefined or configured chip duration table; and The receiving unit receives a code indicated in the R2D transmission from the second device, the code corresponding to at least one of the predefined or configured chip duration codes.

7. The apparatus according to claim 6, wherein, The signals in the R2D transmission include at least one of the following: the preamble in the R2D transmission, the intermester in the R2D transmission, and the postamble in the R2D transmission.

8. The apparatus according to claim 6, wherein, The second information in the scheduling information of the R2D transmission includes at least one of the following: data rate, time resources, and transport block size in the scheduling information of the R2D transmission.

9. The apparatus according to claim 6, wherein, The reference chip duration is the chip duration of the R2D transmission or paging message or Msg0 or Msg2 or R2D control information corresponding to the D2R transmission; and / or, The R2D transmission that provides the reference chip duration is indicated or configured to the first device by the second device or is pre-defined in the protocol.

10. The apparatus according to claim 9, wherein, The receiving unit receives the first R2D transmission, and the processing unit determines the first reference chip duration based on the first R2D transmission, and determines the reference chip duration of the D2R transmission sent within the first time range based on the first reference chip duration. The first time range is indicated to the first device by the second device, or determined by the first device in a manner specified by the protocol.

11. The apparatus according to claim 9, wherein, The receiving unit receives the first R2D transmission at a first time point, and the processing unit determines the first reference chip duration based on the first R2D transmission. Within a second time range starting from the second time point, the processing unit determines the reference chip duration of the D2R transmission based on the first reference chip duration. The receiving unit receives the second R2D transmission at the third time point, and the processing unit determines the second reference chip duration based on the second R2D transmission. Within the third time range starting from the fourth time point, the processing unit determines the reference chip duration of the D2R transmission based on the second reference chip duration.

12. The apparatus according to claim 11, wherein, The first R2D transmission is a reference chip duration indication information, and the second R2D transmission is a reference chip duration update indication information; the signaling carrying the reference chip duration indication information and the signaling carrying the reference chip duration update indication information may be the same or different.

13. The apparatus according to claim 11, wherein, The first R2D transmission and the second R2D transmission are reference chip duration indication information; the signaling carrying the reference chip duration indication information corresponding to the first R2D transmission and the signaling carrying the reference chip duration indication information corresponding to the second R2D transmission are the same or different.

14. The apparatus according to claim 11, wherein, The first reference chip duration and the second reference chip duration may be the same or different.

15. The apparatus according to claim 11, wherein, The first time point and the third time point may be the same or different, and the second time point and the fourth time point may be the same or different.

16. The apparatus according to claim 9, wherein, The receiving unit receives update indication information of the reference chip duration from the second device. The update indication information includes information of the second R2D transmission and the valid time resources of the second reference chip duration. The processing unit determines the reference chip duration of the D2R transmission sent in the valid time resource based on the reference chip duration.

17. The apparatus according to claim 2, wherein, The processing unit determines the slice duration of the D2R transmission based on the D2R transmission, including: The D2R transmission includes a first D2R transmission and / or a second D2R transmission; the first D2R transmission includes at least information for determining the slice duration of the first D2R transmission, or the first D2R transmission includes information for determining the slice duration of the second D2R transmission. The processing unit determines the slice duration of the first D2R transmission or the slice duration of the second D2R transmission based on the first D2R transmission.

18. The apparatus according to claim 17, wherein, The sending unit sends the first D2R transmission; The processing unit determines the slice duration of the first D2R transmission based on the information contained in the preamble, and / or intermezzo, and / or postamble in the first D2R transmission, or based on the transmission type of the first D2R transmission, or based on information related to the slice duration in the first D2R transmission.

19. The apparatus according to claim 17, wherein, The transmitting unit transmits the first D2R transmission and the second D2R transmission; The first D2R transmission indicates the slice duration of the second D2R transmission; or, the slice duration of the first D2R transmission serves as a reference slice duration for determining the slice duration of the second D2R transmission. The processing unit determines the slice duration of the second D2R transmission based on the first D2R transmission.

20. The apparatus according to claim 1, wherein, The first information is carried by physical layer signaling or by higher layer signaling.

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