Communication method and device and readable storage medium

Abstract

The present application relates to the technical field of communications, and more particularly, to a communication method and apparatus, and a readable storage medium, the method comprising: a first device sending a broadcast message, the broadcast message comprising first indication information for indicating the length of a TTI; by adopting the method and the device, the TTI with variable length can be supported so as to adapt to equipment with different capabilities and flexibly adapt to services with different time delays and reliability requirements. The application supports IEEE (Institute of Electrical and Electronic Engineers) standards, such as 802.11 bn / UHR / Wi-Fi 8 standards, integrated millimeter wave / IMMW (Integrated Millimeter Wave) standards, star flash / spark link / nearlink standards, UWB (Ultra Wideband) standards, or perception standards and the like.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more particularly to the field of short-range communication technology, such as communication in scenarios like smart cars, smart homes, smart terminals, and smart manufacturing. Specifically, it relates to a communication method, apparatus, and readable storage medium. Background Technology

[0002] Spark Link, one of the short-range wireless technologies, is currently undergoing standardization. Spark Link (or NearLink) technology can be applied to smart offices, smart homes, smart cockpits, autonomous driving, smart manufacturing, and smart transportation, supporting diverse services with low latency, high reliability, and high security. Based on the "Vehicle-mounted Wireless Short-Range Communication" air interface technology standard, the Spark Link Alliance has developed upper-layer standards for audio, video, and control services, and released the Spark Link 1.0 standard system in November 2022.

[0003] The StarFlash standard is currently evolving further, and technological upgrades can provide a better business experience. However, how to design broadcast messages is a problem that urgently needs to be solved in the next generation of standard evolution. Summary of the Invention

[0004] This application provides a communication method, apparatus, and readable storage medium. By designing broadcast messages, it can support variable-length transmission time intervals (TTIs) to adapt to devices with different capabilities and flexibly adapt to services with different latency and reliability requirements.

[0005] The present application is described below from different aspects. It should be understood that the different implementation methods and beneficial effects described below can be referenced from each other.

[0006] Firstly, this application provides a communication method that can be applied to a first device, or to a chip, functional module, processing system, or communication component disposed in the first device. The following description uses the application of this method to a first device as an example. In this application, the first device can be a master node or a grant (G) node, where the grant node can be understood as a device that schedules other nodes. The method includes: the first device (e.g., a G node) generating and sending a broadcast message, the broadcast message including first indication information used to indicate the length of a transmission time interval (TTI).

[0007] For example, the broadcast message can be carried through a physical broadcast channel (PBCH).

[0008] For example, the total number of bits in the broadcast message can be 64 bits.

[0009] For example, the TTI length considered in this application may be various, such as: 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 millisecond (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0010] For example, the cyclic prefix indication information can be 2 bits, which can indicate cyclic prefixes (CP) of 4 different lengths.

[0011] The transmission time interval (TTI) in this application can represent a unit of time for a single transmit-receive interaction between a first device (such as a G node) and a second device (such as a T node). A TTI may include one or more radio frames. A radio frame can also be simply referred to as a "frame," which may include multiple time-domain symbols. Further details will not be elaborated upon below.

[0012] This application indicates the length of various TTIs through the first indication information in the broadcast message, and the TTI length can be dynamically adjusted to adapt to devices with different capabilities and to flexibly adapt to diverse services with different latency and reliability requirements.

[0013] In conjunction with the first aspect, in one possible implementation, the aforementioned broadcast message further includes at least one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate the length of the cyclic prefix. The radio frame number indication information is used to indicate the frame number of the frame containing the first symbol of the broadcast message, or to indicate the number of the radio frame in which the broadcast message is located.

[0014] This application also indicates longer CPs by using cyclic prefix indication information in broadcast messages, which is beneficial for applications with various coverage distances.

[0015] In conjunction with the first aspect, in one possible implementation, the broadcast message further includes second indication information, which can be used to indicate the number N symbols occupied by the control information common search space, where N is a positive integer. The control information common search space can also be referred to as the control channel common search space, or control information common search resource, or control information communication domain common resource, or control information common resource, or control channel common search resource, and will not be elaborated further below. One or more T nodes served by the G node can detect common control information within this control information common search space. The common control information can indicate the scheduling information required for transmitting system messages, including the time-frequency resources used for transmitting system messages. For example, this common control information can be G link control information.

[0016] For example, the common search space for control information can occupy N consecutive symbols. The positions of these N symbols can be indicated by standard predefined or implicit methods without additional bit overhead. These N symbols can be located after the last symbol among the symbols occupied by the synchronization signal (which may be one or more), the symbols occupied by the identification information (which may be one or more), the symbols occupied by the aforementioned broadcast message (which may be one or more), or the symbols occupied by the reference signal (which may be one or more). In other words, the common search space for control information can occupy the N consecutive symbols immediately following the synchronization signal, or the N consecutive symbols immediately following the identification information, or the N consecutive symbols immediately following the aforementioned broadcast message, or the N consecutive symbols immediately following the reference signal.

[0017] The symbols used in this application can be understood as time-domain symbols, which will not be elaborated further below.

[0018] The aforementioned synchronization signal can be understood as a signal carrying a synchronization sequence. The synchronization sequence may include, but is not limited to, one or more of the following: a first training sequence (FTS), a second training sequence (STS), or a third training sequence (TTS). The aforementioned identification information can be used to identify the first device (e.g., a G-node). For example, the identification information may include the identifier of the first device (e.g., a G-node identifier). Of course, the identification information may also include other content; in other words, besides identifying the first device, the identification information can also be used to implement other functions, which is not limited in this application. The aforementioned reference signal (RS) may be located in the first M symbols of a TTI. For example, a typical value for M is 1.

[0019] For example, in some scenarios, after the first device (such as node G) sends the aforementioned broadcast message, it can send public control information in the aforementioned public search space for control information. Sending public control information in the public search space for control information can be understood as sending public control information on all or part of the symbols occupied by that public search space. For instance, assuming the aforementioned public search space for control information occupies 8 (i.e., N equals 8) symbols, when transmitting public control information, only 2 of these 8 symbols can be used. All second devices (such as nodes T) connected to the first device (such as node G), or all second devices (such as nodes T) served by the first device (such as node G), can blindly detect the public control information on the N symbols occupied by the aforementioned public search space for control information.

[0020] In existing technologies, the common resources of the G-link control information communication domain are used for N consecutive radio frames within a superframe, starting from the radio frame immediately following the radio frame that transmits the second training sequence (STS) signal, using the last system overhead symbol in each of those radio frames. Therefore, the transmission symbols of the G-link control information are relatively scattered, increasing the demodulation delay at the receiver.

[0021] In this application, the symbols occupied by the common search space of control information are in continuous positions, and the symbols occupied by the common search space of control information are located as close to the beginning of a TTI as possible. Compared with the prior art, which transmits the information in multiple radio frames, this is beneficial for the receiver to quickly detect the common control information in the common search space of control information and reduce processing latency.

[0022] In conjunction with the first aspect, in one possible implementation, after the first device sends the aforementioned broadcast message, the method further includes: the first device sending public control information across all or part of the symbols occupied in the aforementioned control information public search space, the public control information including third indication information. This third indication information can be used to indicate time-domain resources allocated to one or more second devices within a TTI. These time-domain resources can be used by the second devices to send and / or receive data. Accordingly, the second devices can blindly detect the public control information across N symbols occupied in the control information public search space.

[0023] For example, the third indication information mentioned above includes the start symbol index and the end symbol index of the time-domain resource. Alternatively, the third indication information mentioned above includes the start symbol index and the number of symbols of the time-domain resource. Alternatively, the third indication information mentioned above includes the end symbol index and the number of symbols of the time-domain resource.

[0024] For example, the third indication information mentioned above also includes a link type indication, which can be used to indicate that time domain resources are used for the second device to send or receive data.

[0025] For example, the link type indicator can be 1 bit. When the link type indicator is "0", it indicates G link transmission, meaning the time domain resource is used for the second device to receive data; when the link type indicator is "1", it indicates T link transmission, meaning the time domain resource is used for the second device to send data. In some scenarios, the third indication information may include two link type indicators (or 2 bits), where one link type indicator (or 1 bit) indicates that the first time domain resource is used for the second device (such as a T node) to send or receive data; and the other link type indicator (or 1 bit) indicates that the second time domain resource is used for the second device (such as a T node) to send or receive data. The first and second time domain resources may be two parts of the time domain resources allocated by the first device to one or more second devices within a TTI.

[0026] This application introduces a third indication information into the public control information to indicate the time domain resources allocated by the first device (such as the G node) to the second device (such as the T node). The second device (such as the T node) can send and / or receive data on the time domain resources and can dynamically adjust the occupancy ratio of G link resources and T link resources within a TTI to flexibly adapt to diverse services with different latency and reliability requirements.

[0027] In conjunction with the first aspect, in one possible implementation, the types of radio frames included in a TTI vary depending on its length. See the description of the method embodiments below for details; only a brief explanation is provided here. When the TTI length is 0.125 milliseconds, a TTI may include only the first type of radio frames. The first type of radio frames includes a first symbol, a second symbol, and at least one guard interval. The first symbol is a symbol transmitted from the first device to the second device, and the second symbol is a symbol transmitted from the second device to the first device. Further explanation of the first and second symbols can be found in the description of the embodiments below. If the first type of radio frames includes one guard interval, the guard interval may be located between the first and second symbols of the first type of radio frames. If the first type of radio frames includes two guard intervals, one guard interval may be located between the first and second symbols of the first type of radio frames, and the other guard interval may be located after the last symbol of the first type of radio frames.

[0028] A TTI may also consist of only Type II radio frames. In these Type II radio frames, all symbols are Type I symbols. The Type I symbols are those transmitted from the first device to the second device.

[0029] A TTI may also include a first type of radio frame and a second type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only first symbols. For a description of the first and second symbols, please refer to the following embodiments; details are not provided here. The first radio frame in this TTI is a second type of radio frame. If the last radio frame in the TTI is a first type of radio frame, the last radio frame includes two guard intervals: one guard interval is located between the first and second symbols of the last radio frame, and the other guard interval is located after the last symbol of the last radio frame. If the first type of radio frame included in the TTI is not the last, the first type of radio frame includes one guard interval located between the first and second symbols of the first type of radio frame.

[0030] A TTI may also include Class 1 radio frames, Class 2 radio frames, and Class 3 radio frames. Class 1 radio frames include a first symbol, a second symbol, and at least one guard interval. Class 2 radio frames contain only first symbols. Class 3 radio frames contain only second symbols. For a description of the first and second symbols, please refer to the following embodiments; they will not be detailed here. The first radio frame in the TTI is a Class 2 radio frame. If the last radio frame in the TTI is a Class 1 radio frame, the last radio frame includes two guard intervals, one between the first and second symbols of the last radio frame, and the other after the last symbol of the last radio frame. If the Class 1 radio frames included in the TTI are not last, the Class 1 radio frames include one guard interval, which is located between the first and second symbols of the Class 1 radio frame. When the last radio frame in the TTI is a Class 3 radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0031] In existing technologies, the configuration of G and T symbols is identical in each radio frame, resulting in a relatively dispersed distribution of G and T symbols. This leads to the inability to centrally transmit G or T link data, increasing transmission latency. The radio frames designed in this application (except for cases where all symbols within a TTI are G) can simultaneously support G and T link transmission, enabling rapid data transmission and ACK (acknowledgment) / NACK (Non-acknowledgment) feedback, reducing latency. Furthermore, the allocation ratio of G and T link resources within a TTI can be dynamically adjusted to flexibly adapt to diverse services with varying latency and reliability requirements.

[0032] In conjunction with the first aspect, in one possible implementation, the method further includes: a first device transmitting identification information, which identifies the first device. The identification information also includes fourth indication information, which indicates the configuration of a first symbol and a second symbol in a first type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval.

[0033] In conjunction with the first aspect, in one possible implementation, the method further includes: a first device sending identification information for identifying itself. The identification information also includes fourth indication information for indicating radio frame configuration within a TTI.

[0034] In conjunction with the first aspect, in one possible implementation, the method further includes: a first device sending identification information for identifying the first device. The identification information also includes fourth indication information for indicating the configuration of a radio frame within a TTI and the configuration of a first symbol and a second symbol in a first type of radio frame.

[0035] In conjunction with the first aspect, in one possible implementation, the aforementioned broadcast message may also include a fourth instruction message.

[0036] In conjunction with the first aspect, in one possible implementation, after the first device sends the aforementioned broadcast message, the method further includes: the first device (e.g., node G) can send public control information in the control information public search space. Correspondingly, the second device (e.g., node T) can blindly check the public control information in the control information public search space. The public control information includes fourth indication information.

[0037] For a detailed explanation of the fourth instruction information, please refer to the method embodiments below, which will not be described in detail here.

[0038] This application provides joint indication by configuring the radio frame within a TTI and configuring the first and second symbols in the first type of radio frame, resulting in lower indication overhead.

[0039] Secondly, this application provides a communication method that can be applied to a second device, or to a chip, functional module, processing system, or communication component disposed in the second device. The following description uses the application of this method to a second device as an example. In this application, the second device can be a slave node or a terminal (T) node, where a slave node can be understood as a scheduled device. The method includes: the second device (such as a T node) receiving and processing a broadcast message, the broadcast message including first indication information used to indicate the TTI length.

[0040] For example, the broadcast message can be carried via PBCH. For example, the total number of bits in the broadcast message can be 64 bits.

[0041] For example, the TTI length considered in this application may be various, such as: 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 millisecond (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0042] For example, the cyclic prefix indication information can be 2 bits, which can indicate cyclic prefixes (CP) of 4 different lengths.

[0043] In conjunction with the second aspect, in one possible implementation, the aforementioned broadcast message further includes at least one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate the length of the cyclic prefix. The radio frame number indication information is used to indicate the frame number of the frame containing the first symbol of the broadcast message, or to indicate the number of the radio frame in which the broadcast message is located.

[0044] In conjunction with the second aspect, in one possible implementation, the aforementioned broadcast message further includes second indication information, which can be used to indicate the number of symbols N occupied by the control information public search space, where N is a positive integer.

[0045] For example, the public search space for control information can occupy N consecutive symbols.

[0046] For example, the common search space for control information may occupy the N consecutive symbols immediately following the synchronization signal, or the common search space for control information may occupy the N consecutive symbols immediately following the identification information, or the common search space for control information may occupy the N consecutive symbols immediately following the broadcast message, or the common search space for control information may occupy the N consecutive symbols immediately following the reference signal.

[0047] The aforementioned synchronization signal can be understood as a signal carrying a synchronization sequence. The synchronization sequence may include, but is not limited to, one or more of the following: a first training sequence (FTS), a second training sequence (STS), or a third training sequence (TTS). The aforementioned identification information can be used to identify the first device (e.g., a G-node). For example, the identification information may include the identifier of the first device (e.g., a G-node identifier). Of course, the identification information may also include other content; in other words, besides identifying the first device, the identification information can also be used to implement other functions, which is not limited in this application. The aforementioned reference signal (RS) may be located in the first M symbols of a TTI. For example, a typical value for M is 1.

[0048] For example, in some scenarios, after receiving the above broadcast message, the second device (such as the G node) can blindly detect the public control information on the N symbols occupied by the public search space of the above control information.

[0049] In conjunction with the second aspect, in one possible implementation, after the second device receives the aforementioned broadcast message, the method further includes: the second device receiving common control information over N symbols occupied by the common search space for control information. This common control information includes third indication information, which can be used to indicate time-domain resources allocated to one or more second devices within a TTI. These time-domain resources can be used by the second device to send and / or receive data.

[0050] For example, the third indication information mentioned above includes the start symbol index and the end symbol index of the time-domain resource. Alternatively, the third indication information mentioned above includes the start symbol index and the number of symbols of the time-domain resource. Alternatively, the third indication information mentioned above includes the end symbol index and the number of symbols of the time-domain resource.

[0051] For example, the third indication information mentioned above also includes a link type indication, which can be used to indicate that time domain resources are used for the second device to send or receive data.

[0052] For example, the link type indicator can be 1 bit. When the link type indicator is "0", it indicates G link transmission, meaning the time domain resource is used for the second device to receive data; when the link type indicator is "1", it indicates T link transmission, meaning the time domain resource is used for the second device to send data. In some scenarios, the third indication information may include two link type indicators (or 2 bits), where one link type indicator (or 1 bit) indicates that the first time domain resource is used for the second device (such as a T node) to send or receive data; and the other link type indicator (or 1 bit) indicates that the second time domain resource is used for the second device (such as a T node) to send or receive data. The first and second time domain resources may be two parts of the time domain resources allocated by the first device to one or more second devices within a TTI.

[0053] In conjunction with the second aspect, in one possible implementation, the types of radio frames included in a TTI vary depending on its length. See the description of the method embodiments below for details; only a brief explanation is provided here. When the TTI length is 0.125 milliseconds, a TTI may include only the first type of radio frames. The first type of radio frames includes a first symbol, a second symbol, and at least one guard interval. The first symbol is a symbol transmitted from the first device to the second device, and the second symbol is a symbol transmitted from the second device to the first device. Further explanation of the first and second symbols can be found in the description of the embodiments below. If the first type of radio frames includes one guard interval, this guard interval may be located between the first and second symbols of the first type of radio frames. If the first type of radio frames includes two guard intervals, one guard interval may be located between the first and second symbols of the first type of radio frames, and the other guard interval may be located after the last symbol of the first type of radio frames.

[0054] A TTI may also consist of only Type II radio frames. In this case, all symbols in a Type II radio frame are Type I symbols.

[0055] A TTI may also include a first type of radio frame and a second type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only first symbols. For a description of the first and second symbols, please refer to the following embodiments; details are not provided here. The first radio frame in this TTI is a second type of radio frame. If the last radio frame in the TTI is a first type of radio frame, the last radio frame includes two guard intervals: one guard interval is located between the first and second symbols of the last radio frame, and the other guard interval is located after the last symbol of the last radio frame. If the first type of radio frame included in the TTI is not the last, the first type of radio frame includes one guard interval located between the first and second symbols of the first type of radio frame.

[0056] A TTI may also include Class 1 radio frames, Class 2 radio frames, and Class 3 radio frames. Class 1 radio frames include a first symbol, a second symbol, and at least one guard interval. Class 2 radio frames contain only first symbols. Class 3 radio frames contain only second symbols. For a description of the first and second symbols, please refer to the following embodiments; they will not be detailed here. The first radio frame in the TTI is a Class 2 radio frame. If the last radio frame in the TTI is a Class 1 radio frame, the last radio frame includes two guard intervals, one between the first and second symbols of the last radio frame, and the other after the last symbol of the last radio frame. If the Class 1 radio frames included in the TTI are not last, the Class 1 radio frames include one guard interval, which is located between the first and second symbols of the Class 1 radio frame. When the last radio frame in the TTI is a Class 3 radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0057] In conjunction with the second aspect, in one possible implementation, the method further includes: a second device receiving identification information used to identify the first device. This identification information also includes fourth indication information used to indicate the configuration of a first symbol and a second symbol in a first type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval.

[0058] In conjunction with the second aspect, in one possible implementation, the method further includes: a second device receiving identification information for identifying a first device. This identification information also includes fourth indication information for indicating radio frame configuration within a TTI.

[0059] In conjunction with the second aspect, in one possible implementation, the method further includes: a second device receiving identification information for identifying a first device. This identification information also includes fourth indication information for indicating the configuration of a radio frame within a TTI and the configuration of a first symbol and a second symbol in a first type of radio frame.

[0060] In conjunction with the second aspect, in one possible implementation, the aforementioned broadcast message may also include a fourth instruction message.

[0061] In conjunction with the second aspect, in one possible implementation, after the second device receives the aforementioned broadcast message, the method further includes: the second device (such as node T) can blindly search for public control information in the public control information search space. This public control information includes fourth indication information.

[0062] For a detailed explanation of the fourth instruction information, please refer to the method embodiments below, which will not be described in detail here.

[0063] Thirdly, this application provides a communication device, which may be a first device or a chip within a first device. The communication device is used to perform the methods described in the first aspect or any possible implementation thereof. The communication device includes modules for performing the methods described in the first aspect or any possible implementation thereof.

[0064] Fourthly, this application provides a communication device, which may be a second device or a chip within a second device. The communication device is used to perform the methods described in the second aspect or any possible implementation thereof. The communication device includes modules having the capability to perform the methods described in the second aspect or any possible implementation thereof.

[0065] In the third or fourth aspect, the aforementioned communication device may include a transceiver module and a processing module. Further details regarding the transceiver module and processing module can be found in the device embodiments shown below. The beneficial effects of the third and fourth aspects described above can be referenced in the relevant descriptions of the first and second aspects, and will not be repeated here.

[0066] Fifthly, this application provides a communication method that can be applied to a first device, or to a chip, functional module, processing system, or communication component disposed in the first device. The following description uses the application of this method to a first device as an example. In this application, the first device can be a master node or a G node. The method includes: the first device (e.g., a G node) generating and sending common control information. For example, the first device (e.g., a G node) sends the common control information on all or part of the symbols occupied by the common control information search space. Correspondingly, a second device can blindly detect the common control information in the common control information search space. The common control information may include third indication information, which can be used to indicate the time-domain resources allocated to the second device (e.g., a T node) within a TTI. These time-domain resources can be used by the second device to send and / or receive data.

[0067] This application introduces a third indication information into the public control information to indicate the time domain resources allocated by the first device (such as the G node) to the second device (such as the T node). The second device (such as the T node) can send and / or receive data on the time domain resources and can dynamically adjust the occupancy ratio of G link resources and T link resources within a TTI to flexibly adapt to diverse services with different latency and reliability requirements.

[0068] In conjunction with the fifth aspect, in one possible implementation, before the first device sends common control information, the method further includes: the first device sending a broadcast message, the broadcast message including first indication information. The first indication information is used to indicate the TTI length. The broadcast message also includes at least one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate the length of the cyclic prefix. The radio frame number indication information is used to indicate the frame number of the frame containing the first symbol that sent the broadcast message, or to indicate the number of the radio frame in which the broadcast message is located.

[0069] For example, the broadcast message can be carried via PBCH.

[0070] For example, the total number of bits in the broadcast message can be 64 bits.

[0071] For example, the TTI length considered in this application may be various, such as: 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 millisecond (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0072] For example, the cyclic prefix indication information can be 2 bits, which can indicate cyclic prefixes (CP) of 4 different lengths.

[0073] This application uses the first indication information in the broadcast message to indicate the length of various TTIs, which can be dynamically adjusted to adapt to devices with different capabilities and flexibly adapt to diverse services with different latency and reliability requirements. Furthermore, this application also uses the cyclic prefix indication information in the broadcast message to indicate CPs of longer lengths, which is beneficial for applications with various coverage distances.

[0074] Sixthly, this application provides a communication method that can be applied to a second device, or to a chip, functional module, processing system, or communication component disposed in the second device. The following description uses the application of this method to a second device as an example. In this application, the second device can be a slave node or a T node. The method includes: the second device (such as a T node) receiving and processing common control information. For example, the second device can blindly detect common control information in a common control information search space; after detecting the common control information, it can process the common control information. The common control information may include third indication information, which can be used to indicate time-domain resources allocated to the second device (such as a T node) within a TTI. These time-domain resources can be used by the second device to send and / or receive data.

[0075] In conjunction with the sixth aspect, in one possible implementation, before the second device receives the common control information, the method further includes: the second device receiving a broadcast message, the broadcast message including first indication information. The first indication information is used to indicate the TTI length. The broadcast message also includes at least one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate the length of the cyclic prefix. The radio frame number indication information is used to indicate the frame number of the frame in which the first symbol transmitting the broadcast message is located, or to indicate the number of the radio frame in which the broadcast message is located.

[0076] For example, the broadcast message can be carried via PBCH.

[0077] For example, the total number of bits in the broadcast message can be 64 bits.

[0078] For example, the TTI length considered in this application may be various, such as: 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 millisecond (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0079] For example, the cyclic prefix indication information can be 2 bits, which can indicate cyclic prefixes (CP) of 4 different lengths.

[0080] In conjunction with the fifth or sixth aspect, in one possible implementation, the aforementioned third indication information may include the start symbol index and the end symbol index of the time-domain resource. Alternatively, the aforementioned third indication information may include the start symbol index and the number of symbols in the time-domain resource. Alternatively, the aforementioned third indication information may include the end symbol index and the number of symbols in the time-domain resource.

[0081] In conjunction with the fifth or sixth aspect, in one possible implementation, the aforementioned third indication information further includes a link type indication, which can be used to indicate that time-domain resources are used for the second device to send or receive data. For details regarding the link type indication, please refer to the preceding description; it will not be repeated here.

[0082] In conjunction with the fifth or sixth aspect, in one possible implementation, the aforementioned broadcast message may further include second indication information, which may be used to indicate the number of symbols N occupied by the control information public search space, where N is a positive integer.

[0083] For example, the public search space for control information can occupy N consecutive symbols.

[0084] For example, the common search space for control information can occupy the N consecutive symbols immediately following the synchronization signal, or the N consecutive symbols immediately following the identification information, or the N consecutive symbols immediately following the broadcast message, or the N consecutive symbols immediately following the reference signal. For explanations regarding synchronization signals, identification information, reference signals, etc., please refer to the preceding descriptions; they will not be detailed here.

[0085] In a seventh aspect, this application provides a communication device, which may be a first device or a chip within a first device. The communication device is used to perform the methods described in the fifth aspect or any possible implementation thereof. The communication device includes modules having the capability to perform the methods described in the fifth aspect or any possible implementation thereof.

[0086] Eighthly, this application provides a communication device, which may be a second device or a chip within a second device. The communication device is used to perform the methods described in the sixth aspect or any possible implementation thereof. The communication device includes modules having the capability to perform the methods described in the sixth aspect or any possible implementation thereof.

[0087] In the seventh or eighth aspect, the aforementioned communication apparatus may include a transceiver module and a processing module. Further details regarding the transceiver module and processing module can be found in the apparatus embodiments shown below. The beneficial effects of the seventh and eighth aspects described above can be referenced in the relevant descriptions of the fifth and sixth aspects, and will not be repeated here.

[0088] Ninthly, embodiments of this application provide a communication device including a processor for executing the methods shown in the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any one of them or any possible implementation thereof. The processor is used to execute a program stored in a memory, and when the program is executed, the methods shown in the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any one of them or any possible implementation thereof are executed.

[0089] In conjunction with the ninth aspect, in one possible implementation, the memory is located outside the aforementioned communication device.

[0090] In conjunction with the ninth aspect, in one possible implementation, the memory is located within the aforementioned communication device.

[0091] In this embodiment, the processor and memory can also be integrated into a single device, that is, the processor and memory can be integrated together. For example, the communication device can be a chip.

[0092] Tenthly, this application provides a communication device, which is a first device, a second device, or a chip therein. The communication device may include logic circuitry and an interface coupled together. Further details regarding the logic circuitry and interface can be found in the embodiments shown below. The interface is used for exchanging (or sending / receiving or inputting / outputting) information or data, and the logic circuitry is used for executing program instructions to cause the communication device to perform the methods described in any possible implementation of the first aspect, the second aspect, the fifth aspect, the sixth aspect, or any of these aspects. The interface may be a communication interface or a transceiver. The transceiver may be a radio frequency module in the communication device, or a combination of a radio frequency module and an antenna, or an input / output interface of a chip or circuit.

[0093] In one aspect, this application provides a readable storage medium storing program instructions that, when run on a computer, cause the computer to perform the method described in any possible implementation of the first aspect, the second aspect, the fifth aspect, the sixth aspect, or any of the aspects.

[0094] In a twelfth aspect, this application provides a computer program product containing program instructions that, when run, causes the method described in any possible implementation of the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any of these aspects to be executed.

[0095] In a thirteenth aspect, this application provides a communication system comprising a first device and a second device; the first device can be used to perform the method described in any possible implementation of the first aspect, or the fifth aspect, or any of the above aspects, and the second device can be used to perform the method described in any possible implementation of the second aspect, or the sixth aspect, or any of the above aspects.

[0096] The technical effects achieved in the above aspects can be referred to each other or to the beneficial effects in the method embodiments shown below, which will not be repeated here. Attached Figure Description

[0097] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0098] Figure 2 This is a flowchart illustrating a communication method provided in an embodiment of this application;

[0099] Figure 3a This is a schematic diagram showing the location of a symbol occupying the public search space for control information provided in this application embodiment;

[0100] Figure 3b This is another schematic diagram showing the location of the symbol occupied by the public search space for control information provided in the embodiments of this application;

[0101] Figure 4 This is another schematic diagram showing the location of the symbol occupying the public search space for control information provided in the embodiments of this application;

[0102] Figure 5a This is a schematic diagram of a frame structure of the first type of wireless frame provided in the embodiments of this application;

[0103] Figure 5b This is a schematic diagram of another frame structure of the first type of wireless frame provided in the embodiments of this application;

[0104] Figure 6a This is a schematic diagram of a wireless frame configuration with a TTI length of 0.25ms provided in an embodiment of this application;

[0105] Figure 6b This is another schematic diagram of the wireless frame configuration when the TTI length is 0.25ms, as provided in the embodiments of this application;

[0106] Figure 7 This is a schematic diagram of a wireless frame configuration with a TTI length of 0.5ms provided in an embodiment of this application;

[0107] Figure 8 This is a schematic diagram of a wireless frame configuration with a TTI length of 1ms provided in an embodiment of this application;

[0108] Figure 9 This is a schematic diagram of a wireless frame configuration with a TTI length of 2ms provided in an embodiment of this application;

[0109] Figure 10a This is a schematic diagram of a wireless frame configuration with a TTI length of 4ms provided in an embodiment of this application;

[0110] Figure 10b This is another schematic diagram of the wireless frame configuration when the TTI length is 4ms, provided in the embodiments of this application;

[0111] Figure 11a This is a schematic diagram of a wireless frame configuration with a TTI length of 8ms provided in an embodiment of this application;

[0112] Figure 11b This is another schematic diagram of the wireless frame configuration when the TTI length is 8ms, provided in the embodiments of this application;

[0113] Figure 12 This is another schematic diagram of the wireless frame configuration when the TTI length is 0.5ms, provided in the embodiments of this application;

[0114] Figure 13 This is another flowchart illustrating the communication method provided in an embodiment of this application;

[0115] Figure 14 This is a schematic diagram of a frame structure for the third indication information provided in an embodiment of this application;

[0116] Figure 15 This is a schematic diagram of a communication device provided in an embodiment of this application;

[0117] Figure 16 This is another schematic diagram of the communication device provided in the embodiments of this application;

[0118] Figure 17 This is another structural schematic diagram of the communication device provided in the embodiments of this application. Detailed Implementation

[0119] In the description of this application, terms such as "first" and "second" are used only to distinguish different objects, not to describe a specific order. Furthermore, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, "at least one" refers to one or more, and "multiple" refers to two or more. "One or more of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c; a and b; a and c; b and c; or a and b and c. Where a, b, and c can be single or multiple.

[0120] The terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0121] In this application, the words "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary," "for example," or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the words "exemplary," "for example," or "for example" is intended to present the relevant concepts in a specific manner.

[0122] In this application, "instruction" can include direct instruction, indirect instruction, explicit instruction, and implicit instruction. When describing information to indicate A, it can be understood that the information carries A, directly indicates A, or indirectly indicates A.

[0123] In this application, "send" and "receive" indicate the direction of signal transmission. For example, "send information to XX" can be understood as the destination of the information being XX, which can include direct transmission via the air interface or indirect transmission by other units or modules via the air interface. "Receive information from YY" can be understood as the source of the information being YY, which can include direct reception from YY via the air interface or indirect reception from YY by other units or modules via the air interface. "Send" can also be understood as the "output" of a chip interface, and "receive" can also be understood as the "input" of a chip interface. In other words, sending and receiving can occur between devices, such as between G nodes and T nodes, or within a device, such as between components, modules, chips, software modules, or hardware modules within the device via buses, traces, or interfaces.

[0124] The following describes the nodes and systems involved in this application.

[0125] The technical solutions provided in this application support Spark Link / NearLink protocols, such as the Spark Low Power (SLE) wireless communication protocol and the Spark Basic (SLB) wireless communication protocol. Alternatively, the technical solutions provided in this application support IEEE protocols, such as the IEEE 802.11be / WiFi7 / EHT (extremely high throughput) protocol, the IEEE 802.11bn / WiFi 8 / UHR (ultra high reliability) protocol, the IEEE IMMW (Integrated mmWave) protocol, the IEEE 802.15.4ab / UWB (ultra wideband) protocol, and the IEEE 802.11bf / Sensing protocol, etc.

[0126] In this application, a node can refer to a device with communication capabilities, which may include, but is not limited to, at least one of user equipment, network equipment, industrial equipment, etc., or the device may be a chip or functional module that supports the above-mentioned devices. For example, user equipment includes at least one of the following: handheld terminal, wearable terminal, vehicle, in-vehicle equipment, sensing device, smart home device, or leisure and entertainment device. Handheld terminals include, but are not limited to, mobile phones, tablets, or laptops; wearable devices include, but are not limited to, headphones, smart bracelets, smartwatches, or smart glasses; transportation vehicles include, but are not limited to, vehicles, ships, aircraft, rail transit (such as subways, high-speed trains), or logistics robots (such as automated guided vehicles, AGVs); in-vehicle equipment includes, but is not limited to, domain controllers (DCs), screens, microphones, speakers, electronic keys, keyless entry, start system controllers, battery management systems (BMS), battery packs, or battery cells; sensing devices include, but are not limited to, cameras, radar, lidar, light sensors, temperature sensors, or humidity sensors; smart home devices include, but are not limited to, projectors, smart TVs, smart refrigerators, smart home gateways, or security equipment; leisure and entertainment devices include, but are not limited to, virtual reality (VR) devices, mixed reality (MR) devices, massage chairs, home theaters, game controllers, or 4D cinema cabins; network equipment includes, but is not limited to, routers, switches, or base stations; and industrial equipment includes, but is not limited to, industrial robots or robotic arms. Of course, in addition to the various types of devices mentioned above, nodes can also be chips, functional modules, or processing systems that can be set in the aforementioned devices.

[0127] It is understood that in certain application scenarios or network types, devices with communication capabilities may not be referred to as nodes. However, for ease of description, devices with communication capabilities are collectively referred to as nodes in this application embodiment.

[0128] A communication system is a system that transmits information using electrical or optical signals. It typically comprises multiple nodes that communicate with each other to transmit information. Nodes in a communication system may have different identities (or roles) and / or different capabilities. This is done to facilitate the management of multi-node systems and to ensure compatibility between nodes with varying computing and communication capabilities. In most communication systems, nodes are distinguished as master nodes and slave nodes. Master nodes can communicate with each other and with slave nodes to perform various functions. A master node can also be called a grant node, access point (AP), authorizing node, master control node, or base station, etc. A slave node can also be called a terminal node, station (STA), or user equipment (UE), etc. The specific names of the grant node and terminal node are not limited in this application; for ease of description, this application uses G nodes and T nodes as examples.

[0129] For example, a G node can have communication and management capabilities. Management capabilities include communication management, such as connection management, resource scheduling, or information security management. For instance, a G node can send resource management information or data scheduling information, such as access layer resource management information.

[0130] For example, a T-node can have communication capabilities and can transmit services with a G-node. For instance, a T-node is a node that receives resource management information (such as access layer resource management information) or data scheduling information and sends data according to the resource management information or data scheduling information. For example, a T-node may include barcodes, radio frequency identification (RFID), sensors, global positioning systems (GPS), lidar, battery cells, etc.

[0131] It is understandable that the identities of G nodes and T nodes are relative; they are merely exemplary names used to distinguish the operations performed by communicating nodes under a possible connection scenario. In some scenarios, when a node belongs to two or more communication domains simultaneously, it may act as a T node in some communication domains and as a G node in others.

[0132] See Figure 1 , Figure 1 This is a schematic diagram of an architecture of a communication system provided in an embodiment of this application. The communication system may include one or more G nodes and one or more T nodes. Figure 1An example is shown with one G node and two T nodes. A G node can be connected to one or more T nodes, and G nodes can also be connected to each other, as can T nodes.

[0133] A G node can establish links with one or more T nodes to achieve various functions. The link between a G node and a T node can be called a "GT link". The GT link can be used for communication between the G node and the T node, or for sensing / ranging between the G node and the T node, etc. The embodiments of this application do not limit the function of the GT link.

[0134] Understandable. Figure 1 The number of G nodes and / or T nodes shown are merely examples and should not be construed as limiting the embodiments of this application.

[0135] The following describes the technical terms used in this application to facilitate understanding by those skilled in the art.

[0136] I. Communication domain, G symbol, T symbol, Transmission Time Interval (TTI), Radio frame, Superframe

[0137] In specific application scenarios, a G node can manage one or more T nodes. The G node connects with these T nodes to jointly complete specific communication functions. This G node and the one or more T nodes connected to it can collectively form a "communication domain".

[0138] A G symbol can represent a symbol sent by node G to node T (G link). A T symbol can represent a symbol sent by node T to node G (T link). The G symbol can also be called a G link symbol, and both can be used interchangeably in this application. The T symbol can also be called a T link symbol, and both can be used interchangeably in this application. A G symbol can also be called a downlink symbol, and a T symbol can also be called an uplink symbol.

[0139] The transmission time interval (TTI) represents the unit of time required for a single transmit-receive interaction between a G node and a T node. A TTI can include one or more radio frames.

[0140] In this application, a radio frame may also be simply referred to as a "frame," which may include multiple time-domain symbols. A superframe may include multiple radio frames.

[0141] II. Broadcast Information

[0142] The broadcast information consists of a total of 63 bits, some of which are indicated as shown in Table 1 below. Table 1 includes radio frame symbol allocation information, which uses 4 bits to indicate 14 frame structures (i.e., the G symbol and T symbol configuration in a radio frame).

[0143] Table 1

[0144]

[0145] The Starflash system uses time division duplexing (TDD). In the existing technology, each superframe contains 48 radio frames, and the duration of each superframe is 1ms.

[0146] In one possible implementation, a radio frame consists sequentially of one or more G symbols, a first handover interval (GAP1), one or more T symbols, and a second handover interval (GAP2). Alternatively, a radio frame consists sequentially of one or more T symbols, a first handover interval (GAP1), one or more G symbols, and a second handover interval (GAP2). Alternatively, a radio frame consists sequentially of multiple symbols, a first interval time (gaptime, GT1), and a second interval time (GT2). Alternatively, a radio frame consists sequentially of a first interval time (GT1), multiple symbols, and a second interval time (GT2).

[0147] When using a standard cyclic prefix, the radio frame supports 14 configurations of G and T symbols, as shown in Table 2 below. When using an extended cyclic prefix, the radio frame supports 12 configurations of G and T symbols, as shown in Table 3 below. This flexible G / T symbol configuration can meet the service rate requirements of different link directions in various application scenarios.

[0148] Table 2: Radio frame structure based on conventional cyclic prefix configuration

[0149]

[0150] Table 3: Radio frame structure based on extended cyclic prefix configuration

[0151]

[0152] The methods involved in this application are described below.

[0153] This application provides a communication method, apparatus, and readable storage medium. By designing system messages, it can support variable-length transmission time intervals (TTIs) to adapt to devices with different capabilities and flexibly adapt to services with different latency and reliability requirements.

[0154] In this application, unless otherwise specified, the same or similar parts between various embodiments or implementations can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The embodiments described below do not constitute a limitation on the scope of protection of this application.

[0155] In one possible implementation, the first device in this application can be a master node, and the second device can be a slave node, which can be scheduled by the master node. For example, the first device in this application can be a G node, and the second device can be a T node. The explanation of G nodes and T nodes can be found above and will not be repeated here. For ease of description, the following explanation uses G nodes and T nodes as examples.

[0156] In one possible implementation, the first symbol involved in this application can be understood as: a symbol sent by the first device to the second device, or a symbol used by the first device to send data to the second device, or a G-link symbol, or a downlink symbol. Correspondingly, the second symbol involved in this application can be understood as: a symbol sent by the second device to the first device, or a symbol used by the second device to send data to the first device, or a T-link symbol, or an uplink symbol. For example, the first symbol is a G symbol, and the second symbol is a T symbol. Here, the G-link symbol can be understood as a symbol sent on a G-link, and the G-link can be understood as a link from the first device to the second device. The T-link symbol can be understood as a symbol sent on a T-link, and the T-link can be understood as a link from the second device to the first device.

[0157] See Figure 2 , Figure 2 This is a flowchart illustrating a communication method provided in an embodiment of this application. For example... Figure 2 As shown, the communication method includes, but is not limited to:

[0158] S101, the first device (such as the G node) generates a broadcast message.

[0159] S102, the first device (such as a G node) sends (e.g., broadcasts) the broadcast message, which includes first indication information for indicating the length of the TTI.

[0160] Correspondingly, the second device (such as node T) receives the broadcast message.

[0161] S103, the second device (such as node T) processes the broadcast message.

[0162] In one possible implementation, the broadcast message can be carried via a physical broadcast channel (PBCH). The broadcast message may include first indication information, which can be used to indicate the length of the transmission time interval (TTI). For example, the TTI lengths considered in this application embodiment include one or more of the following: 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 millisecond (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0163] This application embodiment indicates the length of various TTIs through the first indication information in the broadcast message, and the TTI length can be dynamically adjusted to adapt to devices with different capabilities and flexibly adapt to diverse services with different latency and reliability requirements.

[0164] In one possible implementation, the broadcast message further includes at least one or more of the following: cyclic prefix indication information, or radio frame number indication information. The radio frame number indication information can be used to indicate the frame number of the frame containing the first symbol that sent the broadcast message. The cyclic prefix indication information can be used to indicate the length of the cyclic prefix. For example, the cyclic prefix indication information can be 2 bits, which can indicate four different lengths of cyclic prefix (CP). The specific indication methods for the radio frame number indication information and the cyclic prefix indication information are described later.

[0165] The embodiments of this application use the cyclic prefix indication information in the broadcast message to indicate a longer CP, which is beneficial for application in scenarios with various coverage distances.

[0166] In one possible implementation, the broadcast message may further include second indication information, which can be used to indicate the number N of symbols occupied by the control information common search space. N is a positive integer. The control information common search space may also be referred to as the control channel common search space, or control information common search resource, or control information communication domain common resource, or control information common resource, or control channel common search resource, and will not be elaborated further below. For example, the control information common search space may be the G-link control information communication domain common resource, or simply the G-link control information common resource. The G-link control information may also be referred to as common control information. Accordingly, the common control information may occupy part or all of the time domain resources of the control information common search space. One or more T nodes served by the G node can detect the common control information within the control information common search space. For example, the common control information can indicate the scheduling information required for transmitting system messages, including the time and frequency resources used for transmitting system messages.

[0167] In one possible implementation, the common search space for control information can occupy N consecutive symbols. The positions of these N symbols can be indicated by standard predefined or implicit methods without additional bit overhead. These N symbols can be located after the last symbol among the symbols occupied by the synchronization signal (which may be one or more), the symbols occupied by the identification information (which may be one or more), the symbols occupied by the aforementioned broadcast message (which may be one or more), or the symbols occupied by the reference signal (which may be one or more). In other words, the common search space for control information can occupy the N consecutive symbols immediately following the synchronization signal, or the N consecutive symbols immediately following the identification information, or the N consecutive symbols immediately following the aforementioned broadcast message, or the N consecutive symbols immediately following the reference signal. The symbols involved in the embodiments of this application can be understood as time-domain symbols.

[0168] The aforementioned synchronization signal can be understood as a signal carrying a synchronization sequence, and the symbols occupied by the synchronization signal can also be called synchronization symbols. The synchronization sequence can include, but is not limited to, one or more of the following: a first training sequence (FTS), a second training sequence (STS), or a third training sequence (TTS). The aforementioned identification information can be used to identify the first device (e.g., a G-node). For example, the identification information may include the identifier of the first device (e.g., a G-node identifier), and of course, the identification information may also include other content. In other words, besides identifying the first device, the identification information can also be used to implement other functions, which is not limited in this application embodiment. The aforementioned reference signal (RS) can be located in the first M symbols of a TTI. For example, a typical value of M can be 1. The value of M can be predefined by the system, or it can be indicated by the aforementioned identification information or the aforementioned broadcast message. In some scenarios, the reference signal can be used for channel estimation, and of course, it can also be used to implement other functions, which is not limited in this application embodiment.

[0169] For example, see Figure 3a , Figure 3a This is a schematic diagram showing the location of symbols occupying the common search space for control information provided in this application embodiment. See also... Figure 3b , Figure 3b This is another schematic diagram showing the location of the symbols occupying the common search space for control information provided in this application embodiment. Wherein, Figure 3a and Figure 3b The diagram shows the possible locations in the time domain of the common search space for control information (referred to as the common search space in the diagram for simplicity). Figure 3a and Figure 3b The differences include: Figure 3a The broadcast message and the synchronization block have the same period, both 8ms; Figure 3b The broadcast message and the synchronization block have different periods; the broadcast message has a period of 8ms, while the synchronization block has a period of 2ms. In this embodiment, the synchronization block may include a synchronization signal and identification information, which will not be described in detail below. Here, we take an example where the synchronization signal includes a first training sequence (FTS), a second training sequence (STS), and a third training sequence (TTS). Figure 3a and Figure 3b The examples all use a TTI length of 1ms as an example. Of course, in actual applications, the TTI length can be other values; this is just an example.

[0170] like Figure 3a and Figure 3bAs shown, when a TTI contains a broadcast message, the symbol occupied by the broadcast message follows the symbol occupied by the synchronization block, and the common search space for control information can occupy the N consecutive symbols immediately following the last symbol of the broadcast message within that TTI. When a TTI contains neither a synchronization block nor a broadcast message, the common search space for control information can occupy the N consecutive symbols immediately following the reference signal (RS) within that TTI. The reference signal can be located in the first M symbols of the first frame within a TTI (M is typically 1). When a TTI contains identification information but not a broadcast message, and the symbol occupied by the identification information follows the symbol occupied by the synchronization signal, the common search space for control information can occupy the N consecutive symbols immediately following the identification information within that TTI (e.g., ...). Figure 3b (As shown). When a TTI contains identification information but not broadcast messages, and the symbol occupied by the identification information is not after the symbol occupied by the synchronization signal (for example, the symbol occupied by the identification information is between the symbols occupied by the synchronization signal, such as...). Figure 3b As shown, when there are identification information and a synchronization signal within a TTI, and no broadcast message exists, the common search space for control information can occupy the N consecutive symbols immediately following the last symbol occupied by the synchronization signal within that TTI. In short, when there are identification information and a synchronization signal within a TTI, and no broadcast message exists, the common search space for control information can be placed after the identification information and the synchronization signal, and it can be the N consecutive symbols immediately following each other.

[0171] For another example, see Figure 4 , Figure 4 This is another schematic diagram showing the location of the symbol occupying the public search space for control information provided in the embodiments of this application. Figure 4 The broadcast message and synchronization block have different periods: the broadcast message period is 4ms, and the synchronization block period is 2ms. Here, the synchronization block includes a synchronization signal and identification information. Taking the synchronization signal as an example, which includes the first training sequence (FTS), the second training sequence (STS), and the third training sequence (TTS). Figure 4 Taking a TTI length of 1ms as an example, in actual applications, the length of the TTI can be other values; this is just an example.

[0172] like Figure 4 As shown, when a TTI contains a synchronization block, regardless of whether it contains broadcast messages, the common search space for control information (referred to as the common search space in the diagram for simplicity) can occupy the N consecutive symbols immediately following the last symbol of the symbols occupied by the FTS, STS, TTS, and identification information. If the TTI contains broadcast messages, the symbols occupied by the broadcast messages are not located after the symbols occupied by the synchronization signals and identification information; for example, the symbols occupied by the broadcast messages can be located before the symbols occupied by the FTS, STS, TTS, or identification information. Figure 4 Taking the example of broadcast messages occupying symbols before those occupied by the TTS (Time-to-Side) mechanism, when a TTI contains neither a synchronization block nor a broadcast message, the common search space for control information can occupy the N consecutive symbols immediately following the reference signal (RS) within that TTI. This reference signal can be located within the first M symbols of the first frame of a TTI (M is typically 1). When a TTI contains a broadcast message but not a synchronization block, the common search space for control information can occupy the N consecutive symbols immediately following the last symbol that sent the broadcast message within that TTI. Figure 4 Not shown in the image.

[0173] It is understandable that the above Figure 3a , Figure 3b as well as Figure 4 The examples above use one symbol each for FTS, STS, TTS, identification information, and broadcast messages. In practice, multiple symbols can be used. For instance, identification information can use two symbols, and broadcast messages can use two symbols. Furthermore, the above... Figure 3a , Figure 3b as well as Figure 4 Taking the example that the common search space for control information occupies 1 symbol, in reality the common search space for control information may occupy N symbols, where N is an integer greater than or equal to 1.

[0174] In some scenarios, after the first device (e.g., a G node) sends the broadcast message, it can transmit public control information within the aforementioned public search space for control information. Transmitting public control information within the public search space can be understood as transmitting public control information across all or part of the symbols occupied by that public search space. For example, assuming the public search space occupies 8 symbols (i.e., N equals 8), only 2 of these 8 symbols can be used when transmitting public control information. All second devices (e.g., T nodes) connected to the first device (e.g., the G node), or all second devices (e.g., T nodes) served by the first device (e.g., the G node), can blindly detect the public control information across the N symbols occupied by the public search space. If the public control information is detected, it can be demodulated. For example, the resources carrying the public control information (including time-domain resources and / or frequency-domain resources) can be called public G node control indicator (GCI) resources, which are not limited in this application.

[0175] It is understandable that in existing technologies, the common resources of the G-link control information communication domain are used for N consecutive radio frames within a superframe, starting from the radio frame immediately following the radio frame transmitting the STS signal, using the last system overhead symbol in each of these radio frames. Therefore, the transmission symbols of the G-link control information are relatively scattered, increasing the demodulation delay at the receiving end. In contrast, in the embodiments of this application, the symbols occupying the common search space of the control information are consecutively positioned, and these symbols are located as early as possible within a TTI. Compared to the prior art where the symbols are scattered across multiple radio frames, this allows the receiving end to quickly detect the common control information in the common search space, reducing processing delay.

[0176] In one possible implementation, the broadcast message may further include fifth indication information, which can be used to indicate the number of consecutive TTIs used by the system message within a transmission period. In other words, the fifth indication information can be used to indicate the maximum number of consecutive TTIs within which the system message can be transmitted starting from the initial radio frame number. This system message can be carried over a data channel, for example, via a physical downlink shared channel (PDSCH). For example, the system message can be system information block 0 (SIB0).

[0177] For example, the broadcast message in this application embodiment may include, but is not limited to, one or more of the indication information (or indication subfields) in Table 4 below. For instance, the total number of bits in the broadcast message may be 64 bits.

[0178] Table 4

[0179]

[0180]

[0181] It is understood that the correspondence between the bit values ​​and their meanings of the various indication information in Table 4 above is only an example. In practical applications, the bit values ​​and their meanings of the various indication information may have other mapping relationships, and this application embodiment does not impose any restrictions. Taking the cyclic prefix indication information as an example, the bit value "0" can be used to indicate the cyclic prefix 0, or any one of the bit values ​​"1", "2", or "3" can be used to indicate the cyclic prefix 0, and this application embodiment does not impose any restrictions.

[0182] It can be understood that the cyclic prefixes 0, 1, 2, and 3 in Table 4 above represent four different lengths of cyclic prefixes. For example, the length of cyclic prefix 0 is approximately 0.586 microseconds (µs), cyclic prefix 1 is approximately 1.270 microseconds (µs), cyclic prefix 2 is approximately 2.083 microseconds (µs), and cyclic prefix 3 is approximately 4.167 microseconds (µs). It should be noted that the lengths of the cyclic prefixes mentioned above are approximate values, such as those rounded to the nearest whole number.

[0183] It is understood that, in this embodiment of the application, a wireless frame with a length of 0.125ms (i.e., 125us) is used as an example. When the length of the TTI is different, the configuration of the wireless frames contained in a TTI (including the number and / or the type of wireless frames) is also different.

[0184] Regarding the TTI length indicated by the first indication information in the aforementioned broadcast message, the following describes the possible radio frame configurations (or the structures of TTIs of different lengths) within different TTI lengths.

[0185] (1) The length of TTI is 0.125ms

[0186] At this time, one TTI includes one radio frame. This radio frame is a type 1 radio frame, which in this embodiment is also called a special frame (SF). The type 1 radio frame (or special frame SF) may include a first symbol, a second symbol, and at least one guard interval (GAP). The first symbol is a symbol sent by a first device (e.g., a G node) to a second device (e.g., a T node), and the second symbol is a symbol sent by the second device (e.g., a T node) to the first device (e.g., a G node). The explanation of the first and second symbols can be found above and will not be detailed here.

[0187] For example, let's take the first symbol as G and the second symbol as T. See also... Figure 5a , Figure 5a This is a schematic diagram of a frame structure for a first type of wireless frame provided in an embodiment of this application. For example... Figure 5aAs shown, a special radio frame (SF, also known as a Type 1 radio frame) can include X G symbols, Y T symbols, and a guard interval (GAP). X and Y are both positive integers. The guard interval can be located between the G and T symbols of the special radio frame, such as after the last G symbol and before the first T symbol. The values ​​of X+Y can correspond to different cyclic prefix lengths. One possible implementation is as follows: when the cyclic prefix length is 0.586 microseconds, the value of X+Y can be 13; when the cyclic prefix length is 1.270 microseconds, the value of X+Y can be 12; when the cyclic prefix length is 2.083 microseconds, the value of X+Y can be 11; and when the cyclic prefix length is 4.167 microseconds, the value of X+Y can be 9.

[0188] As another example, let's still use the first symbol as G and the second symbol as T. See also... Figure 5b , Figure 5b This is a schematic diagram of another frame structure for the first type of wireless frame provided in this application embodiment. For example... Figure 5b As shown, a special radio frame (SF, also known as a first-class radio frame) can include X G symbols, Y T symbols, and two guard intervals (such as GAP). X and Y are both positive integers. One of these guard intervals is located between the G and T symbols of the special radio frame (e.g., after the last G symbol and before the first T symbol), and the other guard interval is located after the last symbol. One possible implementation is as follows: when the cyclic prefix length is 0.586 microseconds, X+Y can be 12; when the cyclic prefix length is 1.270 microseconds, X+Y can be 11; when the cyclic prefix length is 2.083 microseconds, X+Y can be 10; and when the cyclic prefix length is 4.167 microseconds, X+Y can be 8.

[0189] It is understood that the embodiments of this application do not limit the length of the protection interval.

[0190] For example, the configuration of the first symbol (e.g., the G symbol) and the second symbol (e.g., the T symbol) within a specific radio frame (i.e., a Type I radio frame) can include one or more of the following tables 5 to 10. Table 5 shows the possible configurations of the G and T symbols within the specific radio frame (i.e., a Type I radio frame) when X+Y is 13. Table 6 shows the possible configurations of the G and T symbols within the specific radio frame (i.e., a Type I radio frame) when X+Y is 12. Table 7 shows the possible configurations of the G and T symbols within the specific radio frame (i.e., a Type I radio frame) when X+Y is 11. Table 8 shows the possible configurations of the G and T symbols within the specific radio frame (i.e., a Type I radio frame) when X+Y is 10. Table 9 shows the possible configurations of the G and T symbols within the specific radio frame (i.e., a Type I radio frame) when X+Y is 9. Table 10 shows the possible configurations of the G and T symbols in this special radio frame (i.e., the first type of radio frame) when X+Y is 8.

[0191] Table 5

[0192]

[0193]

[0194] Table 6

[0195]

[0196] Table 7

[0197]

[0198] Table 8

[0199]

[0200]

[0201] Table 9

[0202]

[0203] Table 10

[0204]

[0205] It is understandable that Tables 5 to 10 above are all explanations using G and T symbols as examples. In practical applications, G symbol can be replaced with the first symbol, and T symbol can be replaced with the second symbol.

[0206] (2) The length of TTI is 0.25ms

[0207] At this point, a TTI includes two radio frames. These two radio frames can be the same type of radio frame, such as both being type II radio frames; or they can be different types of radio frames, such as the first radio frame being a type II radio frame and the second radio frame being a type I radio frame. In the embodiments of this application, the type II radio frame is also called a G node frame (GF) or a downlink frame. The type I radio frame (or special radio frame SF) can include a first symbol, a second symbol, and at least one guard interval (GAP). For example, the configuration of the first and second symbols in the type I radio frame can be any of the configurations in Tables 5 to 10 above. All symbols included in the type II radio frame (or GF) are first symbols. The first symbol is the symbol sent by the first device (e.g., G node) to the second device (e.g., T node), and the second symbol is the symbol sent by the second device (e.g., T node) to the first device (e.g., G node). Further explanation of the first and second symbols can be found in the preceding description.

[0208] For example, see Figure 6a , Figure 6a This is a schematic diagram of a wireless frame configuration with a TTI length of 0.25ms provided in an embodiment of this application. Figure 6a As shown, a TTI includes one Type 1 radio frame (or SF) and one Type 2 radio frame (or GF), where the first radio frame is GF and the second radio frame is SF. The second radio frame includes two guard intervals. In other words, when the last radio frame in a TTI is a Type 1 radio frame, that last radio frame includes two guard intervals.

[0209] For another example, see Figure 6b , Figure 6b This is another schematic diagram illustrating the wireless frame configuration when the TTI length is 0.25ms, as provided in this application embodiment. Figure 6b As shown, a TTI includes two Type 2 radio frames (or GFs). In other words, this TTI can transmit only G symbols.

[0210] For example, a GF frame (i.e., a Type II radio frame) may include X first symbols (such as G symbols), where X is a positive integer. The value of X can correspond to different cyclic prefix lengths. One possible implementation is as follows: when the cyclic prefix length is 0.586 microseconds, the value of X can be 14; when the cyclic prefix length is 1.270 microseconds, the value of X can be 13; when the cyclic prefix length is 2.083 microseconds, the value of X can be 12; and when the cyclic prefix length is 4.167 microseconds, the value of X can be 10. Further details will not be elaborated upon below.

[0211] (3) The length of TTI is 0.5ms

[0212] At this time, a TTI includes four radio frames. These four radio frames can all be Type II radio frames, or they can include Type I and Type II radio frames, or they can include Type I, Type II, and Type III radio frames. In the embodiments of this application, the Type III radio frame is also called a Tnode frame (TF) or an uplink frame. The Type I radio frame (or special radio frame SF) can include a first symbol, a second symbol, and at least one guard interval (GAP). For example, the configuration of the first and second symbols in the Type I radio frame can be any of those in Tables 5 to 10 above. The symbols contained in the Type II radio frame (or GF) are all first symbols. The symbols contained in the Type III radio frame (or TF) are all second symbols. The first symbol is the symbol sent by the first device (e.g., G node) to the second device (e.g., T node), and the second symbol is the symbol sent by the second device (e.g., T node) to the first device (e.g., G node). Further explanation of the first and second symbols can be found in the preceding description.

[0213] For example, see Figure 7 , Figure 7 This is a schematic diagram of a wireless frame configuration with a TTI length of 0.5ms provided in an embodiment of this application. Figure 7 As shown, a TTI includes four radio frames. The first radio frame is a Type II radio frame (or GF), and the four radio frames can include at most one Type I radio frame (or SF). Figure 7 As shown, when the TTI length is 0.5ms, there are four radio frame configurations within the TTI, represented by indices 0 to 3. If the last radio frame in the TTI is a Type 1 radio frame (or SF), then the last radio frame includes two guard intervals, with the second guard interval located after the last symbol of the last radio frame. If the Type 1 radio frame included in the TTI is not the last, then the Type 1 radio frame (or SF) may include one guard interval, which may be located between the first and second symbols of the Type 1 radio frame (or SF). If the last radio frame in the TTI is a Type 3 radio frame (or TF), then there is a guard interval after the last second symbol of the last radio frame. Here, this guard interval may be outside the last radio frame (e.g., TF) but within the TTI; or, this guard interval may be understood as part of the last radio frame (e.g., TF). This application does not impose limitations on the embodiments.

[0214] For example, a TF frame (i.e., a Type 3 radio frame) can include Y second symbols (such as the T symbol), where Y is a positive integer. The value of Y can correspond to different cyclic prefix lengths. One possible implementation is as follows: when the cyclic prefix length is 0.586 microseconds, the value of Y can be 14; when the cyclic prefix length is 1.270 microseconds, the value of Y can be 13; when the cyclic prefix length is 2.083 microseconds, the value of Y can be 12; and when the cyclic prefix length is 4.167 microseconds, the value of Y can be 10. Further details will not be elaborated upon below.

[0215] (4) The length of TTI is 1ms

[0216] At this point, a TTI includes 8 radio frames. These 8 radio frames can all be Type II radio frames, or they can include Type I and Type II radio frames, or they can include Type I, Type II, and Type III radio frames. For details regarding Type I radio frames (or Special Radio Frames, SF), Type II radio frames (or GF), and Type III radio frames (or TF), please refer to the preceding descriptions; they will not be repeated here.

[0217] For example, see Figure 8 , Figure 8 This is a schematic diagram of a wireless frame configuration with a TTI length of 1ms provided in an embodiment of this application. For example... Figure 8 As shown, a TTI includes 8 radio frames. The first radio frame in this TTI is a Type 2 radio frame (or GF), and the majority of these 8 radio frames include at most one Type 1 radio frame (or SF). Figure 8 As shown, when the TTI length is 1ms, there are 8 radio frame configurations within the TTI, represented by indices 0 to 7. If the last radio frame in the TTI is a Type 1 radio frame (or SF), then the last radio frame includes two guard intervals, with the second guard interval located after the last symbol of the last radio frame. If the Type 1 radio frame included in the TTI is not the last, then the Type 1 radio frame (or SF) may include one guard interval, which may be located between the first and second symbols of the Type 1 radio frame (or SF). If the last radio frame in the TTI is a Type 3 radio frame (or TF), then there is a guard interval after the last second symbol of the last radio frame. Here, this guard interval may be outside the last radio frame (e.g., TF) but within the TTI; or, this guard interval may be understood as part of the last radio frame (e.g., TF). This application's embodiments are not limited to this.

[0218] (5) The length of TTI is 2ms

[0219] At this point, a TTI includes 16 radio frames. These 16 radio frames can all be Type II radio frames, or they can include Type I and Type II radio frames, or they can include Type I, Type II, and Type III radio frames. For details regarding Type I radio frames (or Special Radio Frames, SF), Type II radio frames (or GF), and Type III radio frames (or TF), please refer to the preceding descriptions; they will not be repeated here.

[0220] For example, see Figure 9 , Figure 9 This is a schematic diagram of a wireless frame configuration with a TTI length of 2ms provided in an embodiment of this application. For example... Figure 9 As shown, a TTI includes 16 radio frames. The first radio frame in this TTI is a Type 2 radio frame (or GF), and the TTI can include at most one Type 1 radio frame (or SF). Figure 9 As shown, when the TTI length is 2ms, there are 16 radio frame configurations within the TTI, represented by indices 0 to 15. If the last radio frame in the TTI is a Type 1 radio frame (or SF), then the last radio frame includes two guard intervals, with the second guard interval located after the last symbol of the last radio frame. If the Type 1 radio frame included in the TTI is not the last, then the Type 1 radio frame (or SF) may include one guard interval, which may be located between the first and second symbols of the Type 1 radio frame (or SF). If the last radio frame in the TTI is a Type 3 radio frame (or TF), then there is a guard interval after the last second symbol of the last radio frame. Here, this guard interval may be outside the last radio frame (e.g., TF) but within the TTI; or, this guard interval may be understood as a part of the last radio frame (e.g., TF). This application does not impose limitations on the embodiments.

[0221] (6) The length of TTI is 4ms

[0222] At this point, a TTI includes 32 radio frames. These 32 radio frames can all be Type II radio frames, or they can include Type I and Type II radio frames, or they can include Type I, Type II, and Type III radio frames. For details regarding Type I radio frames (or Special Radio Frames, SF), Type II radio frames (or GF), and Type III radio frames (or TF), please refer to the preceding descriptions; they will not be repeated here.

[0223] For example, see Figure 10a , Figure 10aThis is a schematic diagram of a wireless frame configuration with a TTI length of 4ms provided in an embodiment of this application. See also... Figure 10b , Figure 10b This is another schematic diagram illustrating the wireless frame configuration when the TTI length is 4ms, as provided in the embodiments of this application. Figure 10a and Figure 10b As shown, a TTI includes 32 radio frames. The first radio frame in this TTI is a Type II radio frame (or GF), and the TTI can contain at most one Type I radio frame (or SF). Figure 10a and Figure 10b As shown, when the TTI length is 4ms, 16 radio frame configurations are considered within the TTI, represented by indices 0 to 15. Figure 10a and Figure 10b The differences include: Figure 10b The wireless frame configuration shown includes a case where all 32 wireless frames are Type II wireless frames (or GF).

[0224] In this TTI, if the last radio frame is a Type 1 radio frame (or SF), then the last radio frame includes two guard intervals, with the second guard interval located after the last symbol of the last radio frame. If a Type 1 radio frame included in a TTI is not the last, then the Type 1 radio frame (or SF) may include one guard interval, which may be located between the first and second symbols of the Type 1 radio frame (or SF). If the last radio frame in a TTI is a Type 3 radio frame (or TF), then there is a guard interval after the last second symbol of the last radio frame. Here, this guard interval may be outside the last radio frame (e.g., TF) but within the TTI; or, this guard interval may be understood as part of the last radio frame (e.g., TF). This application does not impose limitations on the embodiments described.

[0225] (7) The length of TTI is 8ms

[0226] At this point, a TTI includes 64 radio frames. These 64 radio frames can all be Type II radio frames, or they can include Type I and Type II radio frames, or they can include Type I, Type II, and Type III radio frames. For details regarding Type I radio frames (or Special Radio Frames, SF), Type II radio frames (or GF), and Type III radio frames (or TF), please refer to the preceding descriptions; they will not be repeated here.

[0227] For example, see Figure 11a , Figure 11a This is a schematic diagram of a wireless frame configuration with a TTI length of 8ms provided in an embodiment of this application. See also... Figure 11b , Figure 11b This is another schematic diagram illustrating the wireless frame configuration when the TTI length is 8ms, as provided in the embodiments of this application. Figure 11a and Figure 11b As shown, a TTI includes 64 radio frames. The first radio frame in this TTI is a Type 2 radio frame (or GF), and the TTI can contain at most one Type 1 radio frame (or SF). Figure 11a and Figure 11b As shown, when the TTI length is 4ms, 16 radio frame configurations are considered within the TTI, represented by indices 0 to 15. Figure 11a and Figure 11b The differences include: Figure 11b The wireless frame configuration shown includes a case where all 64 wireless frames are Type II wireless frames (or GF).

[0228] In this TTI, if the last radio frame is a Type 1 radio frame (or SF), then the last radio frame includes two guard intervals, with the second guard interval located after the last symbol of the last radio frame. If a Type 1 radio frame included in a TTI is not the last, then the Type 1 radio frame (or SF) may include one guard interval, which may be located between the first and second symbols of the Type 1 radio frame (or SF). If the last radio frame in a TTI is a Type 3 radio frame (or TF), then there is a guard interval after the last second symbol of the last radio frame. Here, this guard interval may be outside the last radio frame (e.g., TF) but within the TTI; or, this guard interval may be understood as part of the last radio frame (e.g., TF). This application does not impose limitations on the embodiments described.

[0229] As can be understood, the above text categorizes radio frames into three types (such as Type I, Type II, and Type III) to describe possible radio frame configurations within different TTI lengths. There may be multiple radio frames within a single TTI. However, in practical applications, there may only be one type of radio frame.

[0230] In one possible implementation, the configuration of the first symbol (e.g., the G symbol) and / or the second symbol (e.g., the T symbol) in the radio frame can be varied. The radio frame may include only the first symbol (e.g., the G symbol), only the second symbol (e.g., the T symbol), or both the first and second symbols along with a guard interval. There may be one or more guard intervals. The guard interval may be located between the first and second symbols of the radio frame (e.g., after the last first symbol and before the first second symbol). If there are multiple guard intervals, one of them may also be located after the last symbol of the radio frame.

[0231] For example, let's take a case where the first symbol is a G symbol and the second symbol is a T symbol. Assume a radio frame includes 13 symbols, and this radio frame may have 14 frame structures, each with a different ratio of G symbols to / from T symbols. Specifically, the configuration of G and T symbols in this radio frame is shown in Table 11 below.

[0232] Table 11

[0233]

[0234] When a radio frame includes 12 symbols, it can have 13 frame structures. The frame structures (or symbol configurations) with frame structure indices 0 to 10 are the same as those in Table 6 above. The symbol configuration for frame structure index 11 is all G symbols, and the symbol configuration for frame structure index 12 is all T symbols. Similarly, when a radio frame includes 11 symbols, it can have 12 frame structures. The frame structures (or symbol configurations) with frame structure indices 0 to 9 are the same as those in Table 7 above. The symbol configuration for frame structure index 10 is all G symbols, and the symbol configuration for frame structure index 11 is all T symbols. When a radio frame includes 10 symbols, it can have 11 frame structures. The frame structures (or symbol configurations) with frame structure indices 0 to 8 are the same as those in Table 8 above. The symbol configuration for frame structure index 9 is all G symbols, and the symbol configuration for frame structure index 10 is all T symbols. Similarly, when a radio frame includes 9 symbols, it can have 10 frame structures. The frame structures (or symbol configurations) with frame structure indices 0 to 7 are the same as those in Table 9 above. The symbol configuration for frame structure index 8 is all G symbols, and the symbol configuration for frame structure index 9 is all T symbols. When a radio frame includes 8 symbols, it may have 9 frame structures. The frame structures (or symbol configurations) with frame structure indices 0 to 6 are the same as those in Table 10 above. The symbol configuration for frame structure index 7 is all G symbols, and the symbol configuration for frame structure index 8 is all T symbols. Due to space limitations, the configuration of G and / or T symbols in this radio frame is not shown in a table.

[0235] Those skilled in the art will understand that when a radio frame uses a frame structure that includes only the first symbol (such as the G symbol), the radio frame is equivalent to the aforementioned second type radio frame (GF). When a radio frame uses a frame structure that includes only the second symbol (such as the T symbol), the radio frame is equivalent to the aforementioned third type radio frame (TF). When a radio frame uses a frame structure that includes both the first and second symbols as well as a guard interval, the radio frame is equivalent to the aforementioned first type radio frame (SF).

[0236] For example, suppose a TTI is 0.5ms long and contains 4 radio frames. Further suppose each radio frame (frame, F) contains 13 symbols. Then the radio frame configuration within this TTI would be as follows: Figure 12 As shown. Figure 12 Another schematic diagram is shown for the radio frame configuration when the TTI length is 0.5ms. For example... Figure 12 As shown, when the TTI length is 0.5ms, there are four radio frame configurations within this TTI, represented by indices 0 to 3. Radio frame configuration "0" indicates that the frame structure of the first three radio frames can be any of the frame structures represented by frame structure index 12 in Table 11, and the frame structure of the fourth radio frame can be any of the frame structures represented by frame structure indices 0 to 11 in Table 11. Radio frame configuration "1" indicates that the frame structures of the first and second radio frames can be any of the frame structures represented by frame structure index 12 in Table 11, the frame structure of the third radio frame can be any of the frame structures represented by frame structure indices 0 to 11 in Table 11, and the frame structure of the fourth radio frame can be any of the frame structures represented by frame structure index 13 in Table 11. Wireless frame configuration "2" indicates that the frame structure of the first wireless frame can be the frame structure represented by frame structure index 12 in Table 11 above, the frame structure of the second wireless frame can be any of the frame structures represented by frame structure indices 0 to 11 in Table 11 above, and the frame structures of the third and fourth wireless frames can be the frame structure represented by frame structure index 13 in Table 11 above. Wireless frame configuration "3" indicates that the frame structures of all four wireless frames are the frame structures represented by frame structure index 12 in Table 11 above.

[0237] It is understandable that the configuration of radio frames within other TTI lengths is similar to that within a 0.5ms TTI, and will not be listed here.

[0238] It is understood that a TTI typically includes multiple radio frames. However, in existing technologies, as indicated by the broadcast information in Table 1 above, the configuration of G and T symbols is identical in each radio frame, resulting in a relatively dispersed distribution of G and T symbols. This leads to the inability to centrally transmit G or T link data, increasing transmission latency. The radio frames within a TTI designed in this application (except for cases where all symbols within a TTI are G) can simultaneously support G and T link transmission, enabling rapid data transmission and ACK (acknowledgment) / NACK (Non-acknowledgment) feedback, reducing latency. Furthermore, the occupancy ratio of G and T link resources within a TTI can be dynamically adjusted, flexibly adapting to diverse services with varying latency and reliability requirements.

[0239] Based on the possible radio frame configurations within different TTI lengths provided above in the embodiments of this application, the following describes several possible indication methods for radio frame configuration within a TTI.

[0240] In one possible implementation, the broadcast message may further include fourth indication information, which can be used to indicate the configuration of a radio frame within a TTI, and / or the configuration of the first and second symbols in a first type of radio frame. For example, this fourth indication information can be implemented using the reserved bits in Table 4 above.

[0241] In another possible implementation, the above Figure 2 The communication method described further includes: a first device (e.g., a G node) sending identification information. Correspondingly, a second device (e.g., a T node) receiving the identification information. The identification information may include an identifier of the first device for identifying the first device, and the identification information also includes fourth indication information. This fourth indication information may be used to indicate the configuration of a radio frame within a TTI, and / or the configuration of a first symbol and a second symbol in a first type of radio frame.

[0242] In another possible implementation, the above Figure 2The communication method described further includes: a first device (e.g., a G node) can transmit common control information in the common search space of control information, and correspondingly, a second device (e.g., a T node) can blindly detect the common control information in the same common search space. The common control information includes fourth indication information, which can be used to indicate the configuration of a radio frame within a TTI, and / or the configuration of the first and second symbols in a first type of radio frame. Transmitting common control information in the common search space of control information can be understood as transmitting common control information on all or part of the symbols occupied by the common search space. For example, assuming the common search space of control information occupies 8 (i.e., N equals 8) symbols, when transmitting common control information, only 2 of these 8 symbols can be used.

[0243] For example, when the TTI length is 0.125ms, the TTI may contain one radio frame configuration (i.e., all Type 1 radio frames). In this case, the default radio frame configuration can be used without additional indication overhead. The aforementioned fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the configuration of the first and second symbols in the Type 1 radio frames, such as indicating the frame structure indexes in Tables 5 to 11 mentioned above. Which specific table's frame structure index is indicated can be determined based on the length of the cyclic prefix. It can be understood that 4 bits can indicate 16 frame structure indices, while 3 bits can only indicate 8. If the fourth indication information is 3 bits, it can indicate a portion of the frame structure indices in Tables 5 to 11 (including 8 frame structure indices); this will not be elaborated further below. This application does not limit which specific 8 frame structure indices are used.

[0244] When the TTI length is 0.125ms, there may be two radio frame configurations within that TTI. The first configuration could be all Type I radio frames, and the second configuration could be all Type II radio frames. The aforementioned fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the radio frame configuration within a TTI. When the radio frame configuration includes Type I radio frames, it also indicates the configuration of the first and second symbols within those Type I radio frames. For example, the 4-bit or 3-bit most significant bit (MSB) can be used to indicate whether the radio frame configuration within a TTI is Type I or Type II. If the radio frame configuration indicated by the MSB includes Type I radio frames, the remaining 3 bits or 2 bits can be used to indicate the configuration of the first and second symbols within those Type I radio frames, such as indicating the frame structure indexes in Tables 5 to 11. Which specific table's frame structure index is indicated can be determined based on the length of the cyclic prefix. It is understood that 3 bits can indicate 8 configurations of the first and second symbols in the first type of radio frame; 2 bits can indicate 4 configurations of the first and second symbols in the first type of radio frame; these will not be elaborated further below. The embodiments of this application do not limit the specific 8 or 4 configurations.

[0245] When the TTI length is 0.25ms, the TTI may contain a radio frame configuration as described above. Figure 5a As shown, the first radio frame is a type 2 radio frame, and the second radio frame is a type 1 radio frame. The default radio frame configuration can be used in this case, without additional indication overhead. The aforementioned fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the configuration of the first and second symbols in the type 1 radio frame, such as indicating the frame structure index in Tables 5 to 11 mentioned above. Which specific table's frame structure index is indicated can be determined based on the length of the cyclic prefix.

[0246] When the TTI length is 0.25ms, there may be two radio frame configurations within this TTI. In the first radio frame configuration, the first radio frame is a type II radio frame, and the second radio frame is a type I radio frame, as mentioned above. Figure 5a As shown; in the second type of radio frame configuration, each radio frame is a type 2 radio frame, as described above. Figure 5bAs shown. The aforementioned fourth indication information (such as 4 bits or 3 bits) can be used to indicate the radio frame configuration within a TTI. When the radio frame configuration includes Class I radio frames, it also indicates the configuration of the first and second symbols within those Class I radio frames. For example, the 4-bit or 3-bit most significant bit (i.e., the most significant bit, MSB) indicates whether the radio frame configuration within a TTI is Class I or Class II. If the radio frame configuration indicated by the MSB includes Class I radio frames, the remaining 3 bits or 2 bits can be used to indicate the configuration of the first and second symbols within those Class I radio frames, such as indicating the frame structure indexes in Tables 5 to 11 mentioned above. Which specific table's frame structure index is indicated can be determined based on the length of the cyclic prefix.

[0247] When the TTI length is 0.5ms, the TTI may contain 4 radio frame configurations, as described above. Figure 7 As shown. The aforementioned fourth indication information (such as 4 bits or 3 bits) can be used to indicate the radio frame configuration within a TTI. When the radio frame configuration includes Class I radio frames, it also indicates the configuration of the first and second symbols in the Class I radio frames. For example, 2MSB bits from the 4-bit or 3-bit configuration can be used to indicate the radio frame configuration within a TTI. If the radio frame configuration indicated by the 2MSB bits includes Class I radio frames, the remaining 2 bits or 1 bit can be used to indicate the configuration of the first and second symbols in the Class I radio frames. It can be understood that since the remaining 2 bits can only indicate the 4 symbol configurations in Class I radio frames, 4 symbol configurations can be selected from Tables 5 to 11 above for different cyclic prefixes. Similarly, if 1 bit is remaining, only 2 symbol configurations in Class I radio frames can be indicated, and 2 symbol configurations can be selected from Tables 5 to 11 above for different cyclic prefixes. Taking Table 6 above as an example, 4 symbol configurations are selected from 11 symbol configurations, as shown in Table 12 below. The four selected symbol configurations can be implemented in two ways. One possible implementation is the system default configuration, such as the four predefined symbol configurations in the standard. Another possible implementation is to configure a set (containing the four symbol configurations) using System Information Block 0 (SIB0) signaling or higher-level signaling, and then use the remaining 2 bits to indicate each element in the set. This application does not limit this approach.

[0248] Table 12

[0249]

[0250] When the TTI length is 1ms, the TTI may contain 8 radio frame configurations, as described above. Figure 8As shown. The aforementioned fourth indication information (such as 4 bits or 3 bits) can be used to indicate the radio frame configuration within a TTI. When the radio frame configuration includes Class I radio frames, it also indicates the configuration of the first and second symbols in the Class I radio frames. For example, taking 4 bits as an example, 3MSB bits of the 4 bits are used to indicate the radio frame configuration within a TTI. If the radio frame configuration indicated by the 3MSB bits includes Class I radio frames, the remaining 1 bit can be used to indicate the configuration of the first and second symbols in the Class I radio frames. It can be understood that the remaining 1 bit can only indicate two symbol configurations in Class I radio frames. For different cyclic prefixes, two symbol configurations can be selected from Tables 5 to 11 above. One possible implementation of the selected two symbol configurations is the system default configuration, such as the two symbol configurations predefined by the standard. Another possible implementation is to use SIB0 signaling or higher-layer signaling to configure a set (which includes two symbol configurations), and then use the remaining 1 bit to indicate each element in the set. The embodiments of this application do not limit this.

[0251] If the fourth indication information is 3 bits, it can indicate eight radio frame configurations within a TTI. The configuration of the first and second symbols in the first type of radio frame (if present) can use the system default configuration, such as a predefined symbol configuration in the standard. Alternatively, the position of the guard interval can be configured in the SIB signaling or higher-layer signaling to indirectly indicate the configuration of the first and second symbols in the first type of radio frame (if present). For example, the guard interval can be indicated in the SIB signaling or higher-layer signaling after which G symbol.

[0252] When the TTI length is 2ms, 4ms, or 8ms, the TTI may contain 16 radio frame configurations, as described above. Figure 9 ,or Figure 10a ,or Figure 10b ,or Figure 11a ,or Figure 11b As shown. The aforementioned fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the radio frame configuration within a TTI. It can be understood that if the fourth indication information is 3 bits, 8 radio frame configurations can be selected from these 16 configurations, and then these 3 bits can be used to indicate them respectively. The specific 8 radio frame configurations selected are not limited in this application embodiment. Similarly, when the fourth indication information is 3 bits and the TTI length is 1 ms, the configuration of the first and second symbols in the first type of radio frame (if present) can adopt the system default configuration, such as a predefined symbol configuration in the standard. Alternatively, the position of the guard interval can be configured in the SIB signaling or higher-layer signaling to indirectly indicate the configuration of the first and second symbols in the first type of radio frame (if present). For example, the guard interval can be indicated in the SIB signaling or higher-layer signaling after which G symbol.

[0253] The embodiments of this application use a combination of radio frame configuration within a TTI and configuration of the first and second symbols in the first type of radio frame to indicate, resulting in lower indication overhead.

[0254] In one possible implementation, after the first device (e.g., G node) sends the aforementioned broadcast message, as after step S103, the first device (e.g., G node) can send public control information on all or part of the symbols occupied by the control information public search space. Correspondingly, the second device can blindly detect the public control information on N symbols occupied by the control information public search space. The public control information may include third indication information, which can be used to indicate the time-domain resources allocated to the second device (e.g., T node) within a TTI, and these time-domain resources can be used by the second device to send and / or receive data. See below for details. Figure 13 The description of the illustrated embodiment is not detailed here. In this implementation, it is not necessary to explicitly indicate the configuration of the radio frame within a TTI and the configuration of the first and second symbols in the radio frame. The transmission of the G link and T link is achieved by allocating time-domain resources to the second device, and the occupancy ratio of the G link resources and T link resources within a TTI can be dynamically adjusted.

[0255] See Figure 13 , Figure 13 This is another flowchart illustrating the communication method provided in this application embodiment. In one possible implementation, this application embodiment can be related to the foregoing... Figure 2 The embodiments shown can be implemented in combination or individually, and this application does not impose any limitations. When the embodiments of this application are combined with the foregoing... Figure 2 When the illustrated embodiments are implemented in combination, the embodiments of this application can be carried out in accordance with the foregoing Figure 2 The implementation shall be carried out after the illustrated embodiment (specifically after step S103), as detailed in the following description of the embodiment.

[0256] like Figure 13 As shown, the communication method includes, but is not limited to:

[0257] S201, the first device (such as the G node) generates common control information.

[0258] S202, the first device (such as a G node) sends the common control information, which includes third indication information, which indicates the time domain resources allocated to the second device within a TTI, and the time domain resources are used by the second device to send and / or receive data.

[0259] Correspondingly, the second device (such as the T node) receives this public control information.

[0260] S203, The second device (such as node T) processes this common control information.

[0261] In one possible implementation, a first device (e.g., a G node) generates common control information and transmits it across all or part of the symbols occupied by the common control information search space. A second device can blindly detect the common control information across N symbols occupied by the common control information search space. The common control information may include third indication information, which can be used to indicate time-domain resources allocated to one or more second devices (e.g., T nodes) within a TTI. Alternatively, the third indication information can be used to indicate common time-domain resources within a TTI, which can be used by one or more second devices served by the first device (e.g., for sending and / or receiving data). For example, the third indication information may include the start symbol index and the end symbol index of the time-domain resources. Alternatively, the third indication information may include the start symbol index and the number of symbols in the time-domain resources. Alternatively, the third indication information may include the end symbol index and the number of symbols in the time-domain resources. The embodiments of this application do not limit the specific content of the third indication information.

[0262] In this embodiment of the application, the second device (such as the T node) does not need to know the configuration of the radio frame within a TTI, nor does it need to know the configuration of the first symbol (such as the G symbol) and the second symbol (such as the T symbol) in the radio frame. It only needs to perform data transmission and reception according to the time domain resources indicated by the first device (such as the G node).

[0263] For example, K bits from the common control information can be used to indicate the start symbol index of the time-domain resource, and P bits from the same common control information can be used to indicate the end symbol index of the time-domain resource. K and P can be the same or different, and both K and P are positive integers. When both K and P are equal to 10 bits, the indicated symbol position is 1024(2π / 3). 10 There are several types of TTIs, covering different lengths (including 8ms, 4ms, 2ms, 1ms, 0.5ms, 0.25ms, and 0.125ms). The TTI is numbered starting from index 0 (the first symbol in the TTI) and ending with index L (where L is a positive integer). The symbol indices within a TTI are: 0, 1, 2, ..., L. When L is less than 1024, 10 bits can indicate each symbol from 0 to L. For example, if the starting symbol index is L1 and the ending symbol index is L2 (L2 is greater than or equal to L1), then the consecutive symbols from L1 to L2 (including symbols with indices L1 and L2) are allocated to a second device (such as a T-node) for use (e.g., for data transmission and reception).

[0264] It is understood that the embodiments of this application only describe the time-domain resources allocated by the first device to the second device. In actual applications, the common control information may also indicate frequency-domain resources. The embodiments of this application do not limit the indication of frequency-domain resources in the common control information. The second device (such as a T node) can determine on which time-frequency resources it will ultimately transmit and receive data based on the indication of time-frequency resources (including time-domain resources and frequency-domain resources) in the common control information.

[0265] In one possible implementation, time-domain resources allocated by a first device to one or more second devices within a TTI can be used by these one or more second devices to send and / or receive data. Whether the time-domain resources are specifically used for the second devices to send data, receive data, or both, can be determined by the link type indication in the aforementioned third indication information. In other words, the aforementioned third indication information may also include a link type indication, which can be used to indicate whether the time-domain resources are used for the second device (such as a T-node) to send or receive data. For example, the link type indication can be 1 bit. When the value of the link type indication is "0", it indicates G-link transmission, meaning the time-domain resources are used for the second device to receive data; when the value of the link type indication is "1", it indicates T-link transmission, meaning the time-domain resources are used for the second device to send data. In some scenarios, the third indication information may include two link type indications (or 2 bits), where one link type indication (or 1 bit) indicates that the first time domain resource is used for the second device (e.g., a T node) to send or receive data; and the other link type indication (or 1 bit) indicates that the second time domain resource is used for the second device (e.g., a T node) to send or receive data. The first and second time domain resources may be two parts of the time domain resources allocated by the first device to the second device within a TTI. In other words, the aforementioned third indication information can be used to indicate the first and second time domain resources allocated to the second device (e.g., a T node) within a TTI. It can be understood that when one link type indication (or 1 bit) indicates that the first time domain resource is used for the second device to send data, and the other link type indication (or another 1 bit) indicates that the second time domain resource is used for the second device to receive data, the aforementioned time domain resources allocated by the first device to the second device within a TTI are used for both sending and receiving data by the second device.

[0266] For example, suppose a time-domain resource requires (K+P) bits for indication. K bits from the common control information could be used to indicate the start symbol index of the time-domain resource, and P bits from the same common control information could be used to indicate the end symbol index. The aforementioned third indication information could include 2×(K+P+1) bits, where (K+P+1) bits could be used to indicate a first time-domain resource allocated to the second device within a TTI, and that this first time-domain resource is used by the second device to transmit or receive data. Additionally, (K+P+1) bits could be used to indicate a second time-domain resource allocated to the second device (e.g., a T-node) within a TTI, and that this second time-domain resource is used by the second device to transmit or receive data. See also... Figure 14 , Figure 14 This is a schematic diagram of a frame structure for the third indication information provided in an embodiment of this application. For example... Figure 14 As shown, the length of the third indication information can be 2 × (K + P + 1) bits. Specifically, the (K + P) bits in the first (K + P + 1) bits indicate the first time-domain resource allocated to the second device within one TTI. When one bit in the first (K + P + 1) bits is 0, it indicates that the first time-domain resource is used for the second device to receive data, or indicates G-link transmission; when one bit in the first (K + P + 1) bits is 1, it indicates that the first time-domain resource is used for the second device to transmit data, or indicates T-link transmission. Similarly, the (K + P) bits in the last (K + P + 1) bits indicate the second time-domain resource allocated to the second device within one TTI. When one bit in the last (K + P + 1) bits is 0, it indicates that the second time-domain resource is used for the second device to receive data, or indicates G-link transmission; when one bit in the last (K + P + 1) bits is 1, it indicates that the second time-domain resource is used for the second device to transmit data, or indicates T-link transmission.

[0267] It is understandable that the above Figure 14 The bit order shown is merely an example, and the embodiments of this application are not limited. For example, one bit in the first (K+P+1) bits or the last (K+P+1) bits can be placed before the (K+P) bits, or one bit in the first (K+P+1) bits and one bit in the last (K+P+1) bits can be placed at the very beginning of the third indication information, and so on.

[0268] In one possible implementation, for different second devices (e.g., nodes T), the first device (e.g., node G) can send the aforementioned common control information to each second device (e.g., node T) separately. Different second devices (e.g., nodes T) can send and / or receive data on different time-domain resources. Alternatively, the first device (e.g., node G) can also send (e.g., multicast or broadcast) the aforementioned common control information to multiple second devices (e.g., nodes T) it serves. These multiple second devices (e.g., nodes T) can receive data on a given time-domain resource.

[0269] It is understood that the embodiments of this application do not require explicit instruction on the configuration of radio frames within a TTI and the configuration of the first and second symbols in the radio frames. Furthermore, the time domain resources are allocated by the first device (such as the G node), and the second device (such as the T node) transmits and receives data on the given time domain resources according to the instruction of the first device (such as the G node). This can realize the dynamic adjustment of the occupancy ratio of G link resources and T link resources within each TTI, which is beneficial for matching the dynamic changes of services and reducing latency.

[0270] In one possible implementation, before the first device (such as the G node) sends the aforementioned common control information, Figure 13 The communication method described further includes: a first device (e.g., a G node) sending (e.g., broadcasting) a broadcast message, which may include first indication information, which can be used to indicate the length of the TTI. For example, the broadcast message may also include at least one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate the length of the cyclic prefix. The radio frame number indication information is used to indicate the frame number of the frame containing the first symbol that sent the broadcast message. For example, for detailed explanations of the broadcast message, the first indication information, the cyclic prefix indication information, the radio frame number indication information, etc., please refer to the foregoing. Figure 2 The description of the illustrated embodiment will not be repeated here.

[0271] In one possible implementation, the broadcast message may further include second indication information, which can be used to indicate the number N of symbols occupied in the control information public search space. For specific details regarding the second indication information, the position of the symbols occupied in the control information public search space, etc., please refer to the foregoing. Figure 2 The description of the illustrated embodiment will not be repeated here.

[0272] It is understood that, since the embodiments of this application do not require indicating the configuration of a radio frame within a TTI and the configuration of the first and second symbols in the radio frame, the broadcast messages of the embodiments of this application may not include the aforementioned. Figure 2 The fourth instruction information in the illustrated embodiment.

[0273] This application's embodiments introduce third indication information into the public control information to indicate the time domain resources allocated by the first device (such as a G node) to the second device (such as a T node). The second device (such as a T node) can send and / or receive data on these time domain resources. This not only supports variable-length TTIs to adapt to devices with different capabilities, but also dynamically adjusts the occupancy ratio of G link resources and T link resources within a TTI, flexibly adapting to diverse services with different latency and reliability requirements.

[0274] The foregoing details the method provided in this application. To facilitate the implementation of the above-described solutions in the embodiments of this application, corresponding apparatus or devices are also provided in the embodiments of this application.

[0275] This application divides the first device and the second device into functional modules according to the above method embodiments. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application is illustrative and only represents one logical functional division; other division methods may be used in actual implementation. The following will combine... Figures 15 to 17 The device according to the embodiments of this application is described in detail.

[0276] See Figure 15 , Figure 15 This is a schematic diagram of a communication device provided in an embodiment of this application. For example... Figure 15 As shown, the communication device includes a processing module 801 and a transceiver module 802. The transceiver module 802 can implement corresponding communication functions, and the processing module 801 is used to implement corresponding processing functions. The transceiver module 802 can also be referred to as an interface, communication interface, or communication module, etc.

[0277] In some embodiments of this application, the communication device can be used to perform the actions performed by the first device in the above method embodiments. In this case, the communication device can be the first device itself or a chip or functional module configurable in the first device. The transceiver module 802 is used to perform the transceiver-related operations of the first device in the above method embodiments, and the processing module 801 is used to perform the processing-related operations of the first device in the above method embodiments.

[0278] In one design, a processing module 801 can be used to generate a broadcast message; a transceiver module 802 can be used to send the broadcast message. The broadcast message may include first indication information, which indicates the length of the Time Interval (TTI).

[0279] Understandably, the transceiver module 802 can send broadcast messages to other communication devices, or it can output the broadcast message from the processing module 801 to other components or functional modules in the communication device. The explanations for other information output by the transceiver module are similar and will not be detailed below.

[0280] For example, the length of the TTI mentioned above includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 millisecond, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

[0281] For example, the broadcast message described above may also include at least one or more of the following: a cyclic prefix indication and a radio frame number indication. The cyclic prefix indication may be used to indicate the length of the cyclic prefix, and the radio frame number indication may be used to indicate the frame number of the frame in which the first symbol of the broadcast message is sent.

[0282] For example, the broadcast message also includes a second indication information, which indicates the number of symbols N occupied by the public search space for control information, where N is a positive integer.

[0283] For example, the aforementioned control information public search space occupies N consecutive symbols.

[0284] For example, the aforementioned control information common search space occupies the N consecutive symbols immediately following the synchronization signal. Alternatively, the aforementioned control information common search space occupies the N consecutive symbols immediately following the identification information used to identify the first device. Alternatively, the aforementioned control information common search space occupies the N consecutive symbols immediately following the broadcast message. Alternatively, the aforementioned control information common search space occupies the N consecutive symbols immediately following the reference signal.

[0285] For example, the transceiver module 802 is further configured to transmit common control information on all or part of the symbols occupied by the common search space of the control information mentioned above. The common control information includes third indication information, which is used to indicate the time domain resources allocated to the second device within a TTI. The time domain resources are used by the second device to transmit and / or receive data.

[0286] For example, the third indication information mentioned above includes the start symbol index and the end symbol index of the time-domain resource. Alternatively, the third indication information mentioned above includes the start symbol index and the number of symbols of the time-domain resource.

[0287] For example, the third indication information mentioned above also includes a link type indication, which is used to indicate that the time domain resource is used for the second device to send or receive data.

[0288] For example, a TTI includes a first type of radio frame. This first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The first symbol is a symbol transmitted from a first device to a second device, and the second symbol is a symbol transmitted from the second device to the first device.

[0289] For example, a TTI includes a second type of radio frame. The symbols contained in this second type of radio frame are all first symbols, which are symbols sent by the first device to the second device.

[0290] For example, a TTI includes a first type of radio frame and a second type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol, which is a symbol transmitted from the first device to the second device, and the second symbol is a symbol transmitted from the second device to the first device.

[0291] For example, a TTI includes a first type of radio frame, a second type of radio frame, and a third type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol, and the third type of radio frame contains only the second symbol. The first symbol is transmitted from the first device to the second device, and the second symbol is transmitted from the second device to the first device.

[0292] For example, when the last radio frame in the TTI is the first type radio frame, the last radio frame includes two guard intervals, wherein one guard interval is located between the first and second symbols of the last radio frame, and the other guard interval is located after the last symbol. Alternatively, the first type radio frames included in the TTI are not the last, and the first type radio frames include one guard interval located between the first and second symbols of the first type radio frame.

[0293] For example, the first radio frame in this TTI is a type 2 radio frame.

[0294] For example, when the last radio frame in the TTI is a Class 3 radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0295] For example, the transceiver module 802 is also configured to send identification information for identifying the first device. The identification information also includes fourth indication information for indicating the configuration of the first symbol and the second symbol in the first type of radio frame.

[0296] For example, the transceiver module 802 is also configured to send identification information for identifying the first device, and the identification information also includes fourth indication information for indicating the wireless frame configuration within a TTI.

[0297] For example, the transceiver module 802 is also configured to send identification information for identifying the first device. The identification information also includes fourth indication information for indicating the configuration of a radio frame within a TTI and the configuration of the first symbol and the second symbol in the first type of radio frame.

[0298] In this application embodiment, for specific descriptions of terms or nouns or steps such as broadcast message, first instruction information, second instruction information, control information public search space, public control information, third instruction information, identification information, fourth instruction information, first device, and second device, please refer to the description in the above method embodiment, and they will not be described in detail here.

[0299] It is understood that the specific descriptions of the transceiver module and processing module shown in the embodiments of this application are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments (such as...). Figure 2 The details will not be elaborated here. Furthermore, the technical effects of the embodiments of this application are the same as those in the foregoing method embodiments, and for the sake of brevity, will not be repeated here.

[0300] In another design, processing module 801 can be used to generate common control information; transceiver module 802 can be used to send the common control information, which includes third indication information for indicating time domain resources allocated to the second device within a TTI, which are used by the second device to send and / or receive data.

[0301] For example, the third indication information mentioned above includes the start symbol index and the end symbol index of the time-domain resource. Alternatively, the third indication information mentioned above includes the start symbol index and the number of symbols of the time-domain resource.

[0302] For example, the third indication information mentioned above also includes a link type indication, which is used to indicate that the time domain resource is used for the second device to send or receive data.

[0303] For example, the transceiver module 802 can also be used to send a broadcast message, which includes first indication information used to indicate the length of the TTI. The broadcast message also includes at least one or more of cyclic prefix indication information and radio frame number indication information, whereby the cyclic prefix indication information indicates the length of the cyclic prefix and the radio frame number indication information indicates the frame number of the frame in which the first symbol of the broadcast message is sent.

[0304] For example, the length of the TTI includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 millisecond, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

[0305] For example, the broadcast message also includes a second indication information, which indicates the number of symbols N occupied by the public search space for control information, where N is a positive integer.

[0306] For example, the aforementioned control information public search space occupies N consecutive symbols.

[0307] For example, the aforementioned control information common search space occupies the N consecutive symbols immediately following the synchronization signal. Alternatively, the aforementioned control information common search space occupies the N consecutive symbols immediately following the identification information used to identify the first device. Alternatively, the aforementioned control information common search space occupies the N consecutive symbols immediately following the broadcast message. Alternatively, the aforementioned control information common search space occupies the N consecutive symbols immediately following the reference signal.

[0308] In this application embodiment, for specific descriptions of terms or nouns or steps such as public control information, third instruction information, broadcast message, first instruction information, second instruction information, first device, and second device, please refer to the description in the above method embodiment, and they will not be described in detail here.

[0309] It is understood that the specific descriptions of the transceiver module and processing module shown in the embodiments of this application are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments (such as...). Figure 13 The details will not be elaborated here. Furthermore, the technical effects of the embodiments of this application are the same as those in the foregoing method embodiments, and for the sake of brevity, will not be repeated here.

[0310] Reuse Figure 15In other embodiments of this application, the communication device can be used to perform the actions performed by the second device in the above method embodiments. In this case, the communication device can be the second device itself or a chip or functional module configurable in the second device. The transceiver module 802 is used to perform the transceiver-related operations of the second device in the above method embodiments, and the processing module 801 is used to perform the processing-related operations of the second device in the above method embodiments.

[0311] In one design, a transceiver module 802 can be used to receive broadcast messages; a processing module 801 can be used to process the broadcast message. The broadcast message includes first indication information, which is used to indicate the length of the TTI (Time-to-Time Interval).

[0312] Understandably, the transceiver module 802 can receive broadcast messages from other communication devices, or it can input the broadcast message from other components or functional modules within the communication device. The explanations regarding other information input by the transceiver module are similar and will not be detailed below.

[0313] For example, the broadcast message may include at least one or more of a cyclic prefix indication and a radio frame number indication, wherein the cyclic prefix indication is used to indicate the length of the cyclic prefix and the radio frame number indication is used to indicate the frame number of the frame in which the first symbol of the broadcast message is sent.

[0314] For example, the length of the TTI includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 millisecond, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

[0315] For example, the broadcast message also includes a second indication information, which indicates the number of symbols N occupied by the control information public search space, where N is a positive integer.

[0316] For example, the public search space for this control information occupies N consecutive symbols.

[0317] For example, the control information common search space occupies the N consecutive symbols immediately following the synchronization signal. Alternatively, the control information common search space occupies the N consecutive symbols immediately following the identification information used to identify the first device. Alternatively, the control information common search space occupies the N consecutive symbols immediately following the broadcast message. Alternatively, the control information common search space occupies the N consecutive symbols immediately following the reference signal.

[0318] For example, the transceiver module 802 can also be used to receive common control information on the symbols occupied by the common search space of the control information mentioned above. The common control information includes third indication information, which is used to indicate the time domain resources allocated to the second device within a TTI. The time domain resources are used by the second device to send and / or receive data.

[0319] For example, the third indication information includes the start symbol index and the end symbol index of the time-domain resource. Alternatively, the third indication information includes the start symbol index and the number of symbols of the time-domain resource.

[0320] For example, the third indication information also includes a link type indication, which indicates that the time domain resource is used for the second device to send or receive data.

[0321] For example, a TTI includes a first type of radio frame. This first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The first symbol is a symbol transmitted from a first device to a second device, and the second symbol is a symbol transmitted from the second device to the first device.

[0322] For example, a TTI includes a second type of radio frame. The symbols contained in this second type of radio frame are all first symbols, which are symbols sent by the first device to the second device.

[0323] For example, a TTI includes a first type of radio frame and a second type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval, while the second type of radio frame contains only the first symbol. The first symbol is transmitted from the first device to the second device, and the second symbol is transmitted from the second device to the first device.

[0324] For example, a TTI includes a first type of radio frame, a second type of radio frame, and a third type of radio frame. The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol, and the third type of radio frame contains only the second symbol. The first symbol is transmitted from the first device to the second device, and the second symbol is transmitted from the second device to the first device.

[0325] For example, when the last radio frame in the TTI is the first type radio frame, the last radio frame includes two guard intervals, wherein one guard interval is located between the first and second symbols of the last radio frame, and the other guard interval is located after the last symbol. Alternatively, the first type radio frames included in the TTI are not the last, and the first type radio frames include one guard interval located between the first and second symbols of the first type radio frame.

[0326] For example, the first radio frame in this TTI is a type 2 radio frame.

[0327] For example, when the last radio frame in the TTI is a Class 3 radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0328] For example, the transceiver module 802 can also be used to receive identification information for identifying the first device. The identification information also includes fourth indication information for indicating the configuration of the first symbol and the second symbol in the first type of radio frame.

[0329] For example, the transceiver module 802 can also be used to receive identification information for identifying the first device. The identification information also includes fourth indication information for indicating the wireless frame configuration within a TTI.

[0330] For example, the transceiver module 802 can also be used to receive identification information for identifying the first device. The identification information also includes fourth indication information for indicating the configuration of a radio frame within a TTI and the configuration of the first symbol and the second symbol in the first type of radio frame.

[0331] In this application embodiment, for specific descriptions of terms or nouns or steps such as broadcast message, first instruction information, second instruction information, control information public search space, public control information, third instruction information, identification information, fourth instruction information, first device, and second device, please refer to the description in the above method embodiment, and they will not be described in detail here.

[0332] It is understood that the specific descriptions of the transceiver module and processing module shown in the embodiments of this application are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments (such as...). Figure 2 The details will not be elaborated here. Furthermore, the technical effects of the embodiments of this application are the same as those in the foregoing method embodiments, and for the sake of brevity, will not be repeated here.

[0333] In another design, the transceiver module 802 can be used to receive common control information; the processing module 801 can be used to process the common control information. The common control information includes third indication information, which indicates the time-domain resources allocated to the second device within a TTI, the time-domain resources being used by the second device to send and / or receive data.

[0334] For example, the third indication information includes the start symbol index and the end symbol index of the time-domain resource. Alternatively, the third indication information includes the start symbol index and the number of symbols of the time-domain resource.

[0335] For example, the third indication information also includes a link type indication, which indicates that the time domain resource is used for the second device to send or receive data.

[0336] For example, the transceiver module 802 can also be used to receive a broadcast message, which includes first indication information used to indicate the length of the TTI. The broadcast message also includes at least one or more of cyclic prefix indication information and radio frame number indication information, whereby the cyclic prefix indication information indicates the length of the cyclic prefix and the radio frame number indication information indicates the frame number of the frame in which the first symbol of the broadcast message is sent.

[0337] For example, the length of the TTI includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 millisecond, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

[0338] For example, the broadcast message also includes a second indication information, which indicates the number of symbols N occupied by the control information public search space, where N is a positive integer.

[0339] For example, the public search space for this control information occupies N consecutive symbols.

[0340] For example, the control information common search space occupies the N consecutive symbols immediately following the synchronization signal. Alternatively, the control information common search space occupies the N consecutive symbols immediately following the identification information used to identify the first device. Alternatively, the control information common search space occupies the N consecutive symbols immediately following the broadcast message. Alternatively, the control information common search space occupies the N consecutive symbols immediately following the reference signal.

[0341] In this application embodiment, for specific descriptions of terms or nouns or steps such as public control information, third instruction information, broadcast message, first instruction information, second instruction information, first device, and second device, please refer to the description in the above method embodiment, and they will not be described in detail here.

[0342] It is understood that the specific descriptions of the transceiver module and processing module shown in the embodiments of this application are merely examples. For the specific functions or execution steps of the transceiver module and processing module, please refer to the above method embodiments (such as...). Figure 13 The details will not be elaborated here. Furthermore, the technical effects of the embodiments of this application are the same as those in the foregoing method embodiments, and for the sake of brevity, will not be repeated here.

[0343] The first and second devices according to embodiments of this application have been described above. The possible product forms of the first and second devices are described below. It should be understood that any device possessing the above-described... Figure 15 Any form of product that incorporates the functions of the first and second devices described herein falls within the protection scope of this application. It should also be understood that the following description is merely illustrative and does not limit the product forms of the first and second devices in this application to these examples.

[0344] In one possible implementation, Figure 15 In the communication device shown, the processing module 801 can be one or more processors, and the transceiver module 802 can be a transceiver, or the transceiver module 802 can also be a transmitting module and a receiving module. The transmitting module can be a transmitter, and the receiving module can be a receiver. The transmitting module and the receiving module are integrated into one device, such as a transceiver. In the embodiments of this application, the processor and the transceiver can be coupled, etc., and the connection method between the processor and the transceiver is not limited in the embodiments of this application. In the process of executing the above method, the process of sending information (such as sending a broadcast message) in the above method can be the process of the processor outputting the above information. When outputting the above information, the processor outputs the above information to the transceiver so that the transceiver can transmit it. After the above information is output by the processor, it may need to undergo other processing before reaching the transceiver. Similarly, the process of receiving information (such as receiving a broadcast message) in the above method can be the process of the processor receiving the input above information. When the processor receives the input information, the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the aforementioned information, the information may need to undergo further processing before being input into the processor.

[0345] See Figure 16 , Figure 16 This is another schematic diagram of the communication device provided in the embodiments of this application. The communication device can be a first device or a second device, or a chip therein. Figure 16 Only the main components of the communication device are shown. In addition to the processor 1001, the communication device may further include a transceiver 1002, a memory 1003, and input / output devices (not shown).

[0346] The processor 1001 is mainly used to process communication protocols and communication data, control the entire communication device, execute software programs, and process the data of the software programs. The memory 1003 is mainly used to store software programs and data. In one design, the transceiver 1002 can be called a transceiver unit, transceiver, or transceiver circuit, etc., and is used to implement the transceiver function. The transceiver 1002 may include a receiver and a transmitter. The receiver can be called a receiver or receiving circuit, etc., and is used to implement the receiving function; the transmitter can be called a transmitter or transmitting circuit, etc., and is used to implement the transmitting function. In another design, the transceiver 1002 may include a control circuit and an antenna. The control circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. Input / output devices, such as touch screens, displays, and keyboards, are mainly used to receive user input data and output data to the user.

[0347] When the communication device is powered on, the processor 1001 can read the software program in the memory 1003, interpret and execute the instructions of the software program, process the data of the software program, and control the medium access control (MAC) layer and physical layer (PHY) to implement the method of this application embodiment. When data needs to be transmitted wirelessly, the processor 1001 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit performs RF processing on the baseband signal and transmits the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor 1001. The processor 1001 converts the baseband signal into data and processes the data.

[0348] In another implementation, the radio frequency circuitry and antenna can be set up independently of the processor performing baseband processing. For example, in a distributed scenario, the radio frequency circuitry and antenna can be arranged remotely, independent of the communication device.

[0349] The processor 1001, transceiver 1002, and memory 1003 can be connected via a communication bus.

[0350] For example, when the communication device is used to perform the above... Figure 2 When the first device executes a step, method, or function in the method embodiment shown, the processor 1001 can be used to execute... Figure 2 Step S101, and / or other processes for performing the techniques described herein; transceiver 1002 can be used to perform Figure 2 Step S102 in the document, and / or other processes used in the techniques described herein.

[0351] For example, when the communication device is used to perform the above... Figure 2 In the method embodiment shown, when the second device performs a step, method, or function, the processor 1001 can be used to receive broadcast messages and / or to perform other processes of the technology described herein; the transceiver 1002 can be used to perform... Figure 2 Step S103 in the document, and / or other processes used in the techniques described herein.

[0352] For example, when the communication device is used to perform the above... Figure 13 When the first device executes a step, method, or function in the method embodiment shown, the processor 1001 can be used to execute... Figure 13 Step S201, and / or other processes used to perform the techniques described herein; transceiver 1002 can be used to perform Figure 13 Step S202 in the document, and / or other processes used in the techniques described herein.

[0353] For example, when the communication device is used to perform the above... Figure 13 In the method embodiment shown, when the second device performs a step, method, or function, the processor 1001 can be used to receive common control information and / or to perform other processes of the technology described herein; the transceiver 1002 can be used to perform... Figure 13 Step S203 in the document, and / or other processes used in the techniques described herein.

[0354] In any of the above designs, the processor 1001 may store instructions, which may be computer programs. These computer programs, running on the processor 1001, cause the communication device to perform the methods described in the above method embodiments. The computer program may be embedded in the processor 1001; in this case, the processor 1001 may be implemented in hardware.

[0355] In one implementation, the communication device may include a circuit that can perform the functions of transmitting, receiving, or communicating in the aforementioned method embodiments. The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal-oxide semiconductors (CMOS), n-metal-oxide-semiconductor (NMOS), positive-channel metal-oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon-germanium (SiGe), gallium arsenide (GaAs), etc.

[0356] It is understood that the communication device shown in the embodiments of this application may also have more than Figure 16 This application does not limit the use of other components or other related elements. The methods performed by the processor and transceiver shown above are merely examples; for the specific steps performed by the processor and transceiver, please refer to the description of the method embodiments above. Figure 16 The dashed part indicates that it is optional.

[0357] In another possible implementation, Figure 15 In the communication device shown, the processing module 801 can be one or more logic circuits, and the transceiver module 802 can be an input / output interface, or a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver module 802 can also be a transmitting module and a receiving module. The transmitting module can be an output interface, and the receiving module can be an input interface. The transmitting module and the receiving module are integrated into one module, such as an input / output interface.

[0358] See Figure 17 , Figure 17 This is another structural schematic diagram of the communication device provided in the embodiments of this application. For example... Figure 17 As shown, Figure 17The communication device shown includes logic circuitry 901 and interface 902. That is, the processing module 801 can be implemented using logic circuitry 901, and the transceiver module 802 can be implemented using interface 902. The logic circuitry 901 can be a chip, processing circuit, integrated circuit, or system-on-chip (SoC) chip, etc., and the interface 902 can be a communication interface, input / output interface, pins, etc. For example, Figure 17 The above-mentioned communication device is used as an example of a chip, which includes a logic circuit 901 and an interface 902.

[0359] In this embodiment, the logic circuit and the interface can also be coupled to each other. The specific connection method between the logic circuit and the interface is not limited in this embodiment.

[0360] For example, when the communication device is used to perform the aforementioned Figure 2 When the first device executes a method, function, or step in the method embodiment shown, logic circuit 901 can be used to generate a broadcast message, which may include first indication information for indicating the length of TTI; interface 902 can be used to output the broadcast message.

[0361] For example, when the communication device is used to perform the aforementioned Figure 2 When the second device executes a method, function, or step in the method embodiment shown, interface 902 can be used to input a broadcast message, which includes first indication information used to indicate the length of TTI; processing module 801 can be used to process the broadcast message.

[0362] In this application embodiment, for specific descriptions of terms or nouns or steps such as broadcast message and first instruction information, please refer to the above method embodiment (e.g. Figure 2 The details in the previous section will not be elaborated here.

[0363] For example, when the communication device is used to perform the aforementioned Figure 13 When the first device executes a method, function, or step in the method embodiment shown, logic circuit 901 can be used to generate common control information; interface 902 can be used to output the common control information, which includes third indication information, which indicates the time domain resources allocated to the second device within a TTI, and the time domain resources are used by the second device to send and / or receive data.

[0364] For example, when the communication device is used to perform the aforementioned Figure 13When the second device executes a method, function, or step in the method embodiment shown, interface 902 can be used to input common control information, which includes third indication information. The third indication information is used to indicate the time domain resources allocated to the second device within a TTI, which are used by the second device to send and / or receive data. Logic circuit 901 can be used to process the common control information.

[0365] In this application embodiment, specific descriptions of terms or nouns or steps such as public control information and third instruction information can also be found in the above method embodiment (e.g., Figure 13 The details described in the document will not be elaborated here.

[0366] It is understood that the communication device shown in the embodiments of this application can implement the method provided in the embodiments of this application in hardware form or in software form, etc., and the embodiments of this application do not limit it in this way.

[0367] for Figure 17 The specific implementation of the embodiments shown can also be found in the above embodiments, which will not be described in detail here.

[0368] Furthermore, embodiments of this application also provide a communication system, which includes a first device and a second device, the first device and the second device being usable for performing the methods in any of the foregoing embodiments.

[0369] This application also provides a computer program for implementing the operations and / or processes performed by the first device in the method provided in this application.

[0370] This application also provides a computer program for implementing the operations and / or processes performed by the second device in the method provided in this application.

[0371] This application also provides a computer-readable storage medium storing computer code that, when executed on a computer, causes the computer to perform the operations and / or processes performed by the first device in the method provided in this application.

[0372] This application also provides a computer-readable storage medium storing computer code that, when executed on a computer, causes the computer to perform the operations and / or processes performed by the second device in the method provided in this application.

[0373] This application also provides a computer program product, which includes computer code or a computer program that, when run on a computer, causes the operations and / or processes performed by the first device in the method provided in this application to be executed.

[0374] This application also provides a computer program product comprising computer code or a computer program that, when run on a computer, causes the operations and / or processes performed by a second device in the method provided in this application to be executed.

[0375] In the embodiments provided in this application, it should be understood that the disclosed systems, communication devices, and methods can be implemented in other ways. For example, the communication device embodiments described above are merely illustrative. For instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, communication devices, or modules, or it may be an electrical, mechanical, or other form of connection.

[0376] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of this application.

[0377] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0378] If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0379] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication method, characterized in that, include: The first device generates a broadcast message; The first device sends a broadcast message, which includes first indication information, which is used to indicate the length of the transmission time interval (TTI).

2. The method according to claim 1, characterized in that, The length of the TTI includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 millisecond, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

3. The method according to claim 1 or 2, characterized in that, The broadcast message also includes a second indication information, which indicates the number of symbols N occupied by the control information public search space, where N is a positive integer.

4. The method according to claim 3, characterized in that, The control information public search space occupies N consecutive symbols.

5. The method according to claim 3 or 4, characterized in that, The control information common search space occupies the N consecutive symbols immediately following the synchronization signal; Alternatively, the control information public search space occupies the N consecutive symbols immediately following the identifier information, and the identifier information is used to identify the first device; Alternatively, the control information public search space occupies the N consecutive symbols immediately following the broadcast message; Alternatively, the common search space for control information occupies the N consecutive symbols immediately following the reference signal.

6. The method according to any one of claims 3 to 5, characterized in that, The method further includes: The first device transmits common control information on all or part of the symbols occupied by the common search space for control information. The common control information includes third indication information, which is used to indicate the time domain resources allocated to the second device within a TTI. The time domain resources are used by the second device to transmit and / or receive data.

7. The method according to claim 6, characterized in that, The third indication information includes the start symbol index of the time-domain resource and the end symbol index of the time-domain resource; Alternatively, the third indication information may include the starting symbol index of the time-domain resource and the number of symbols of the time-domain resource.

8. The method according to claim 6 or 7, characterized in that, The third indication information also includes a link type indication, which is used to indicate that the time domain resources are used for the second device to send or receive data.

9. The method according to any one of claims 1 to 5, wherein a TTI includes a first type of radio frame; in, The first type of wireless frame includes a first symbol, a second symbol, and at least one guard interval. The first symbol is a symbol sent by the first device to the second device, and the second symbol is a symbol sent by the second device to the first device.

10. The method according to any one of claims 1 to 5, wherein a TTI includes a second type of radio frame; in, The symbols contained in the second type of wireless frame are all first symbols, which are the symbols sent by the first device to the second device.

11. The method according to any one of claims 1 to 5, wherein a TTI includes a first type of radio frame and a second type of radio frame; in, The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol, which is the symbol sent by the first device to the second device, and the second symbol is the symbol sent by the second device to the first device.

12. The method according to any one of claims 1 to 5, wherein a TTI includes a first type of radio frame, a second type of radio frame, and a third type of radio frame; in, The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol. The third type of radio frame contains only the second symbol. The first symbol is a symbol sent by the first device to the second device, and the second symbol is a symbol sent by the second device to the first device.

13. The method according to any one of claims 11 or 12, wherein when the last radio frame in the TTI is a first type of radio frame, the last radio frame includes two guard intervals, wherein, One guard interval is located between the first and second symbols of the last radio frame, and another guard interval is located after the last symbol; Alternatively, the first type of radio frame included in the TTI is not at the end, and the first type of radio frame includes a guard interval located between the first symbol and the second symbol of the first type of radio frame.

14. The method according to any one of claims 10 to 12, wherein the first radio frame in the TTI is a second type of radio frame.

15. The method according to claim 12, wherein when the last radio frame in the TTI is a third type radio frame, there is a guard interval after the last second symbol of the last radio frame.

16. The method according to claim 9, characterized in that, The method further includes: The first device sends identification information, which is used to identify the first device. The identification information also includes fourth indication information, which is used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame.

17. The method according to any one of claims 10 to 12, further comprising: The first device sends identification information, which is used to identify the first device. The identification information also includes fourth indication information, which is used to indicate the radio frame configuration within a TTI.

18. The method according to claim 11 or 12, further comprising: The first device sends identification information, which is used to identify the first device. The identification information also includes fourth indication information, which is used to indicate the configuration of radio frames within a TTI and the configuration of the first symbol and the second symbol in the first type of radio frames.

19. A communication method, characterized in that, include: The second device receives a broadcast message, the broadcast message including first indication information, the first indication information being used to indicate the length of the transmission time interval (TTI); The second device processes the broadcast message.

20. The method according to claim 19, characterized in that, The length of the TTI includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 millisecond, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

21. The method according to claim 19 or 20, characterized in that, The broadcast message also includes a second indication information, which indicates the number of symbols N occupied by the control information public search space, where N is a positive integer.

22. The method according to claim 21, characterized in that, The control information public search space occupies N consecutive symbols.

23. The method according to claim 21 or 22, characterized in that, The control information common search space occupies the N consecutive symbols immediately following the synchronization signal; Alternatively, the control information public search space occupies the N consecutive symbols immediately following the identifier information, and the identifier information is used to identify the first device; Alternatively, the control information public search space occupies the N consecutive symbols immediately following the broadcast message; Alternatively, the common search space for control information occupies the N consecutive symbols immediately following the reference signal.

24. The method according to any one of claims 21 to 23, characterized in that, The method further includes: The second device receives common control information on all or part of the symbols occupied by the common search space of the control information. The common control information includes third indication information, which is used to indicate the time domain resources allocated to the second device within a TTI. The time domain resources are used by the second device to send and / or receive data.

25. The method according to claim 24, characterized in that, The third indication information includes the start symbol index of the time-domain resource and the end symbol index of the time-domain resource; Alternatively, the third indication information may include the starting symbol index of the time-domain resource and the number of symbols of the time-domain resource.

26. The method according to claim 24 or 25, characterized in that, The third indication information also includes a link type indication, which is used to indicate that the time domain resources are used for the second device to send or receive data.

27. The method according to any one of claims 19 to 23, wherein a TTI includes a first type of radio frame; in, The first type of wireless frame includes a first symbol, a second symbol, and at least one guard interval. The first symbol is a symbol sent by the first device to the second device, and the second symbol is a symbol sent by the second device to the first device.

28. The method according to any one of claims 19 to 23, wherein a TTI includes a second type of radio frame; in, The symbols contained in the second type of wireless frame are all first symbols, which are the symbols sent by the first device to the second device.

29. The method according to any one of claims 19 to 23, wherein a TTI includes a first type of radio frame and a second type of radio frame; in, The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol, which is the symbol sent by the first device to the second device, and the second symbol is the symbol sent by the second device to the first device.

30. The method according to any one of claims 19 to 23, wherein a TTI includes a first type of radio frame, a second type of radio frame, and a third type of radio frame; in, The first type of radio frame includes a first symbol, a second symbol, and at least one guard interval. The second type of radio frame contains only the first symbol. The third type of radio frame contains only the second symbol. The first symbol is a symbol sent by the first device to the second device, and the second symbol is a symbol sent by the second device to the first device.

31. The method according to claim 29 or 30, wherein when the last radio frame in the TTI is a radio frame of the first type, the last radio frame includes two guard intervals, wherein, One guard interval is located between the first and second symbols of the last radio frame, and another guard interval is located after the last symbol; Alternatively, the first type of radio frame included in the TTI is not at the end, and the first type of radio frame includes a guard interval located between the first symbol and the second symbol of the first type of radio frame.

32. The method according to any one of claims 28 to 30, wherein the first radio frame in the TTI is a second type of radio frame.

33. The method according to claim 30, wherein when the last radio frame in the TTI is a third type radio frame, there is a guard interval after the last second symbol of the last radio frame.

34. The method according to claim 27, characterized in that, The method further includes: The second device receives identification information, which is used to identify the first device. The identification information also includes fourth indication information, which is used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame.

35. The method according to any one of claims 28 to 30, further comprising: The second device receives identification information, which is used to identify the first device. The identification information also includes fourth indication information, which is used to indicate the radio frame configuration within a TTI.

36. The method according to claim 29 or 30, further comprising: The second device receives identification information, which is used to identify the first device. The identification information also includes fourth indication information, which is used to indicate the configuration of a radio frame within a TTI and the configuration of the first symbol and the second symbol in the first type of radio frame.

37. A communication device, characterized in that, Includes a module for performing the method as described in any one of claims 1 to 18, or a module for performing the method as described in any one of claims 19 to 36.

38. A communication device, characterized in that, include: One or more processors, said one or more processors being coupled to one or more memories; Wherein, the one or more memories are used to store a computer program, and the one or more processors are used to execute the computer program stored in the one or more memories, so that the communication device performs the method as described in any one of claims 1 to 18, or performs the method as described in any one of claims 19 to 36.

39. A communication device, characterized in that, Includes logic circuits and interfaces, wherein the logic circuits and interfaces are coupled; The interface is used for inputting and / or outputting information, and the logic circuit is used for performing the method as described in any one of claims 1 to 36.

40. A readable storage medium, characterized in that, The device is used to store a program, which is executed by one or more processors, such that a device including the one or more processors performs the method as described in any one of claims 1 to 36.

41. A computer program product, characterized in that, When the computer program product is executed, the method as described in any one of claims 1 to 36 is performed.

42. A communication system, characterized in that, It includes a first device and a second device, the first device being used to perform the method as described in any one of claims 1 to 18, and the second device being used to perform the method as described in any one of claims 19 to 36.

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