Communication method and apparatus, and readable storage medium

Abstract

The present application relates to the technical field of communications, and particularly relates to a communication method and apparatus, and a readable storage medium. The method comprises: a first device sending a broadcast message, wherein the broadcast message comprises first indication information, which is used for indicating the length of a TTI. By means of the present application, TTIs having variable lengths can be supported, so as to adapt to devices having different capabilities and flexibly adapt to services having different delays and reliability requirements. The present application supports IEEE standards, such as the 802.11bn / UHR / Wi-Fi 8 standard, the integrated millimeter wave / IMMW standard, the spark link / near link standard, the UWB standard, or the sensing standard.

Description

Communication method, device and readable storage medium

[0001] The present application claims priority to the Chinese patent application No. 202411125537.0, filed on August 15, 2024, with the State Intellectual Property Office of China, and entitled "Communication method, device and readable storage medium", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, especially the field of short-range communication technology, such as communication in scenarios of smart cars, smart homes, smart terminals and smart manufacturing, etc. Specifically, the present application relates to a communication method, device and readable storage medium. BACKGROUND

[0003] One of the wireless short-range technologies, the spark link or near link technology, is in the process of standardization. The spark link technology can be applied to smart office, smart home, smart cabin, smart driving, smart manufacturing and smart transportation, and supports diversified services with low latency, high reliability and high security. Based on the air interface technology standard of "Vehicle Wireless Short-Range Communication", the spark link alliance has formulated upper-layer standards for audio, video and control services, and released the spark link 1.0 standard system in November 2022.

[0004] The current spark link standard is further evolving, and through technical upgrading, better service experience can be provided. However, in the evolution of the next generation of standards, how to design broadcast messages is a problem to be solved. SUMMARY

[0005] The embodiments of the present application provide a communication method, device and readable storage medium, which can support variable length transmission time interval (TTI) through the design of broadcast messages, so as to adapt to devices with different capabilities and flexibly adapt to services with different latency and reliability requirements.

[0006] The present application will be described from different aspects below. It should be understood that the implementation and beneficial effects of the different aspects below can be mutually referred to.

[0007] In a first aspect, the present application provides a communication method, which can be applied to a first device, or a chip, a functional module, a processing system or a communication component arranged in the first device. Hereinafter, the method is taken as an example applied to the first device. In the present application, the first device can be a master node or a grant (G) node, and the grant node can be understood as a device scheduling other nodes. The method comprises: generating and sending, by the first device (e.g., the G node), a broadcast message, wherein the broadcast message comprises first indication information, and the first indication information is used to indicate a transmission time interval (TTI) length.

[0008] For example, the broadcast message can be carried by a physical broadcast channel (PBCH).

[0009] For example, the total number of bits of the broadcast message can be 64 bits.

[0010] For example, the TTI length considered in the present application can be various, such as 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 milliseconds (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0011] For example, the cyclic prefix indication information can be 2 bits, which can indicate 4 lengths of cyclic prefix (CP).

[0012] The transmission time interval (TTI) in the present application can represent a unit time for one-time transceiving interaction between the first device (e.g., the G node) and the second device (e.g., the T node). One TTI can include one or more radio frames. The radio frame can also be referred to as “frame”, which can include a plurality of time domain symbols. Details are not described herein.

[0013] The first indication information in the broadcast message is used to indicate the length of the TTI, which can dynamically adjust the TTI length to adapt to devices with different capabilities, and can flexibly adapt to diversified services with different time delays and reliability requirements.

[0014] In combination with the first aspect, in a possible implementation, the broadcast message further comprises 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 where the first symbol of the broadcast message is located, or indicate the number of the radio frame where the broadcast message is located.

[0015] The application also indicates the CPs of more lengths through the cyclic prefix indication information in the broadcast message, which is beneficial to be applied to the scenes of different coverage distances.

[0016] In combination with the first aspect, in a possible implementation, the broadcast message further includes second indication information, which can be used to indicate the number of symbols N occupied by the control information common search space, and N is a positive integer. The control information common search space can also be referred to as a control channel common search space, or a control information common search resource, or a control information communication domain common resource, or a control information common resource, or a control channel common search resource, which will not be repeated hereinafter. One or more T nodes served by the G node can detect the common control information in the control information common search space. The common control information can indicate the scheduling information required when transmitting the system message, including the time-frequency resource used for transmitting the system message. For example, the common control information can be G link control information.

[0017] For example, the control information common search space can occupy N continuous symbols. The position of the N symbols can be indicated by a standard predefinition or an implicit manner, without additional bit overhead. The position of the N symbols can be located after the last symbol of the symbol (which can be one or more) occupied by the synchronization signal, the symbol (which can be one or more) occupied by the identification information, the symbol (which can be one or more) occupied by the broadcast message, or the symbol (which can be one or more) occupied by the reference signal. In other words, the control information common search space can occupy the N continuous symbols immediately after the synchronization signal, or the control information common search space can occupy the N continuous symbols immediately after the identification information, or the control information common search space can occupy the N continuous symbols immediately after the broadcast message, or the control information common search space can occupy the N continuous symbols immediately after the reference signal.

[0018] The symbol involved in the application can be understood as a time domain symbol, which will not be repeated hereinafter.

[0019] The synchronization signal can be understood as a signal carrying a synchronization sequence. The synchronization sequence can include one or more of the following: a first training sequence (FTS), a second training sequence (STS), or a third training sequence (TTS). The identification information can be used to identify the first device (e.g., a G node). For example, the identification information can include an identifier of the first device (e.g., a G node identifier). Of course, the identification information can also include other information. In other words, the identification information can be used to perform other functions in addition to identifying the first device. The application does not limit this. The reference signal (RS) can be located in the first M symbols of a TTI. For example, M can be equal to 1.

[0020] For example, in some scenarios, after the first device (e.g., a G node) transmits the broadcast message, the first device can transmit common control information in the control information common search space. Transmitting common control information in the control information common search space can be understood as transmitting common control information in all or part of the symbols occupied by the control information common search space. For example, assume that the control information common search space occupies 8 symbols (i.e., N is equal to 8), and common control information is transmitted using only 2 of the 8 symbols. All second devices (e.g., T nodes) connected to the first device (e.g., a G node) or all second devices (e.g., T nodes) served by the first device (e.g., a G node) can blindly detect the common control information in the N symbols occupied by the control information common search space.

[0021] In the prior art, the G-link control information communication domain common resource is used in the last system overhead symbol of each of the N consecutive radio frames starting from the radio frame immediately after the radio frame in which the second training sequence (STS) signal is transmitted. Therefore, the transmission symbols of the G-link control information are scattered, and the demodulation delay of the receiver is increased.

[0022] In the application, the symbols occupied by the control information common search space are continuous, and the symbols occupied by the control information common search space are located as early as possible in a TTI. Compared with the prior art in which the transmission is scattered in multiple radio frames, this is advantageous for the receiver to quickly blindly detect the common control information in the control information common search space and reduce the processing delay.

[0023] In a possible implementation of the first aspect, after the first device sends the broadcast message, the method further includes: the first device sending common control information in all or part of the symbols occupied by the control information common search space, the common control information including third indication information. The third indication information can be used to indicate time domain resources allocated to one or more second devices in a TTI. The time domain resources can be used by the second devices to send and / or receive data. Accordingly, the second devices can blindly detect the common control information in the N symbols occupied by the control information common search space.

[0024] For example, the third indication information includes a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information includes a starting symbol index of the time domain resources and a number of symbols of the time domain resources. Alternatively, the third indication information includes an ending symbol index of the time domain resources and a number of symbols of the time domain resources.

[0025] For example, the third indication information further includes a link type indication, which can be used to indicate whether the time domain resources are used by the second devices to send or receive data.

[0026] 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, i.e., the time domain resources are used by the second devices to receive data. When the value of the link type indication is "1", it indicates T-link transmission, i.e., the time domain resources are used by the second devices to send data. In some scenarios, two link type indications (or 2 bits) can be included in the third indication information, one of which (or 1 bit) is used to indicate whether the first time domain resources are used by the second devices (e.g., T nodes) to send or receive data, and the other of which (or 1 bit) is used to indicate whether the second time domain resources are used by the second devices (e.g., T nodes) to send or receive data. The first time domain resources and the second time domain resources can be two parts of the time domain resources allocated to one or more second devices by the first device in a TTI.

[0027] The third indication information is introduced in the common control information to indicate time domain resources allocated to the second devices (e.g., T nodes) by the first device (e.g., G node), and the second devices (e.g., T nodes) can send and / or receive data in the time domain resources. The proportion of G-link resources and T-link resources occupied in a TTI can be dynamically adjusted, and diversified services with different delays and reliability requirements can be flexibly adapted.

[0028] With reference to the first aspect, in a possible implementation manner, according to different lengths of the TTI, the types of radio frames included in one TTI are also different. For details, refer to the description of the method embodiments below, and here only a brief description is given. When the length of the TTI is 0.125 ms, one TTI can only include 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. 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. For details, refer to the description of the embodiments below. If the first type of radio frame includes one guard interval, the guard interval can be located between the first symbol and the second symbol of the first type of radio frame. If the first type of radio frame includes two guard intervals, one of the guard intervals can be located between the first symbol and the second symbol of the first type of radio frame, and the other guard interval is located after the last symbol of the first type of radio frame.

[0029] One TTI can also only include a second type of radio frame. The second type of radio frame includes only first symbols. The first symbol is a symbol sent by the first device to the second device.

[0030] One TTI can also include the first type of radio frame and the 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 includes only first symbols. For details, refer to the description of the embodiments below, which are not described here. The first radio frame in the TTI is the second type of radio frame. If the last radio frame in the TTI is the first type of radio frame, the last radio frame includes two guard intervals, one of which is located between the first symbol and the second symbol of the last radio frame, and the other 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, which is located between the first symbol and the second symbol of the first type of radio frame.

[0031] The TTI can also include 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 includes only the first symbol. The third type of radio frame includes only the second symbol. The first symbol and the second symbol are described below in the description of the embodiments and are not described in detail here. The first radio frame in the TTI is the second type of radio frame. If the last radio frame in the TTI is the first type of radio frame, the last radio frame includes two guard intervals, one of which is between the first symbol and the second symbol of the last radio frame, and the other of which is after the last symbol of the last radio frame. If the first type of radio frame is not the last radio frame in the TTI, the first type of radio frame includes one guard interval between the first symbol and the second symbol of the first type of radio frame. When the last radio frame in the TTI is the third type of radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0032] In the prior art, the configuration of the G symbol and the T symbol in each radio frame is the same, which causes the G symbol and the T symbol to be relatively dispersed, so that the G link data or the T link data cannot be transmitted in a concentrated manner, and the transmission delay is increased. The radio frames in the TTI designed in the present application (except for the case where all the radio frames in a TTI are G symbols) can simultaneously support G link and T link transmission, can quickly perform data transmission and ACK (acknowledgment) / NACK (Non-acknowledgment) feedback, and can reduce the delay. The proportion of G link resources and T link resources occupied in a TTI can be dynamically adjusted, and the diversified services with different delay and reliability requirements can be flexibly adapted.

[0033] With reference to the first aspect, in a possible implementation, the method further includes that the first device sends identification information, the identification information being used to identify the first device. The identification information further includes fourth indication information, the fourth indication information being used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame. The first type of radio frame includes the first symbol, the second symbol, and at least one guard interval.

[0034] With reference to the first aspect, in a possible implementation, the method further includes that the first device sends identification information, the identification information being used to identify the first device. The identification information further includes fourth indication information, the fourth indication information being used to indicate the configuration of the radio frames in the TTI.

[0035] With reference to the first aspect, in a possible implementation manner, the method further includes: the first device sending identification information, the identification information being used to identify the first device. The identification information further includes fourth indication information, the fourth indication information being used to indicate the configuration of the radio frames within the TTI and the configuration of the first symbol and the second symbol in the first type of radio frames.

[0036] With reference to the first aspect, in a possible implementation manner, the broadcast message further includes the fourth indication information.

[0037] With reference to the first aspect, in a possible implementation manner, after the first device sends the broadcast message, the method further includes: the first device (e.g., a G node) sending common control information in a control information common search space. Correspondingly, the second device (e.g., a T node) can blindly detect the common control information in the control information common search space. The common control information includes the fourth indication information.

[0038] The fourth indication information will be described below in the method embodiments, and thus will not be repeated here.

[0039] The present application jointly indicates the configuration of the radio frames within the TTI and the configuration of the first symbol and the second symbol in the first type of radio frames, and the indication overhead is smaller.

[0040] In the second aspect, the present application provides a communication method, which can be applied to a second device, or a chip, a functional module, a processing system or a communication component arranged in the second device, and the like. Hereinafter, the method is taken as an example applied to the second device. In the present application, the second device can be a slave node or a terminal (T) node, and the slave node can be understood as a scheduled device. The method includes: the second device (e.g., a T node) receiving and processing a broadcast message, the broadcast message including first indication information, the first indication information being used to indicate a TTI length.

[0041] Exemplarily, the broadcast message can be carried by a PBCH. Exemplarily, the total number of bits of the broadcast message can be 64 bits.

[0042] Exemplarily, the TTI length considered by the present application can be various, such as 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 milliseconds (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0043] Exemplarily, the cyclic prefix indication information can be 2 bits, which can indicate 4 lengths of cyclic prefix (CP).

[0044] With reference to the second aspect, in a possible implementation manner, the broadcast message further comprises one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used for indicating a length of a cyclic prefix. The radio frame number indication information is used for indicating a frame number of a frame in which a first symbol of the broadcast message is located, or indicating a number of a radio frame in which the broadcast message is located.

[0045] With reference to the second aspect, in a possible implementation manner, the broadcast message further comprises second indication information, which can be used for indicating a number N of symbols occupied by the control information common search space, N being a positive integer.

[0046] For example, the control information common search space can occupy N consecutive symbols.

[0047] For example, the control information common search space can occupy N consecutive symbols immediately after a synchronization signal, or the control information common search space can occupy N consecutive symbols immediately after identification information, or the control information common search space can occupy N consecutive symbols immediately after the broadcast message, or the control information common search space can occupy N consecutive symbols immediately after a reference signal.

[0048] For example, the synchronization signal can be understood as a signal carrying a synchronization sequence. The synchronization sequence can include, but is not limited to, one or more of a first training sequence (FTS), a second training sequence (STS), or a third training sequence (TTS). The identification information can be used for identifying a first device (such as a G node). For example, the identification information can include an identifier of the first device (such as a G node identifier), and the identification information can also include other contents. In other words, the identification information can be used for other functions in addition to identifying the first device, which is not limited in the present application. The reference signal (RS) can be located in the first M symbols in a TTI. For example, a typical value of M can be 1.

[0049] For example, in some scenarios, after the second device (such as a G node) receives the broadcast message, the second device can perform blind detection of the common control information in the N symbols occupied by the control information common search space.

[0050] In a possible implementation manner of the second aspect, after the second device receives the broadcast message, the method further includes: receiving, by the second device, common control information on the N symbols occupied by the control information common search space, wherein the common control information includes third indication information, and the third indication information can be used to indicate time domain resources allocated to one or more second devices in a TTI. The time domain resources can be used for the second device to transmit and / or receive data.

[0051] For example, the third indication information includes a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information includes a starting symbol index of the time domain resources and a symbol number of the time domain resources. Alternatively, the third indication information includes an ending symbol index of the time domain resources and a symbol number of the time domain resources.

[0052] For example, the third indication information further includes a link type indication, which can be used to indicate that the time domain resources are used for the second device to transmit or receive data.

[0053] For example, the link type indication can be 1 bit, and when the value of the link type indication is "0", it indicates G-link transmission, that is, the time domain resources are used for the second device to receive data; and when the value of the link type indication is "1", it indicates T-link transmission, that is, the time domain resources are used for the second device to transmit data. In some scenarios, two link type indications (or 2 bits) can be included in the third indication information, one of which (or 1 bit) is used to indicate that the first time domain resources are used for the second device (such as a T node) to transmit or receive data, and the other of which (or 1 bit) is used to indicate that the second time domain resources are used for the second device (such as a T node) to transmit or receive data. The first time domain resources and the second time domain resources can be two parts of the time domain resources allocated to one or more second devices by the first device in a TTI.

[0054] In a possible implementation manner of the second aspect, according to different lengths of the TTI, the types of the radio frames included in one TTI are also different. For details, refer to the description of the method embodiments below, and here only a brief description is given. When the length of the TTI is 0.125 ms, the first type of radio frame can be included in one TTI. The first type of radio 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. For details, refer to the description of the embodiments below. If the first type of radio frame includes one guard interval, the guard interval can be located between the first symbol and the second symbol of the first type of radio frame. If the first type of radio frame includes two guard intervals, one of the guard intervals can be located between the first symbol and the second symbol of the first type of radio frame, and the other guard interval is located after the last symbol of the first type of radio frame.

[0055] The second type of radio frame can also be included in one TTI. The second type of radio frame includes only the first symbol.

[0056] The first type of radio frame and the second type of radio frame can also be included in one TTI. The first type of radio frame includes the first symbol, the second symbol, and at least one guard interval. The second type of radio frame includes only the first symbol. For details, refer to the description of the embodiments below. The first radio frame in the TTI is the second type of radio frame. If the last radio frame in the TTI is the first type of radio frame, the last radio frame includes two guard intervals, one of which is located between the first symbol and the second symbol of the last radio frame, and the other is located after the last symbol of the last radio frame. If the first type of radio frame is not the last in the TTI, the first type of radio frame includes one guard interval, and the guard interval is located between the first symbol and the second symbol of the first type of radio frame.

[0057] The TTI can also include the first type of radio frame, the second type of radio frame, and the third type of radio frame. The first type of radio frame includes the first symbol, the second symbol, and at least one guard interval. The second type of radio frame includes only the first symbol. The third type of radio frame includes only the second symbol. The first symbol and the second symbol are described below in the description of the embodiments and are not described in detail here. The first radio frame in the TTI is the second type of radio frame. If the last radio frame in the TTI is the first type of radio frame, the last radio frame includes two guard intervals, one of which is between the first symbol and the second symbol of the last radio frame, and the other of which is after the last symbol of the last radio frame. If the first type of radio frame is not the last radio frame in the TTI, the first type of radio frame includes one guard interval between the first symbol and the second symbol of the first type of radio frame. When the last radio frame in the TTI is the third type of radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0058] With reference to the second aspect, in a possible implementation, the method further includes that the second device receives identification information, where the identification information is used to identify the first device. The identification information further includes fourth indication information, where the fourth indication information is used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame. The first type of radio frame includes the first symbol, the second symbol, and at least one guard interval.

[0059] With reference to the second aspect, in a possible implementation, the method further includes that the second device receives identification information, where the identification information is used to identify the first device. The identification information further includes fourth indication information, where the fourth indication information is used to indicate the configuration of the radio frame in the TTI.

[0060] With reference to the second aspect, in a possible implementation, the method further includes that the second device receives identification information, where the identification information is used to identify the first device. The identification information further includes fourth indication information, where the fourth indication information is used to indicate the configuration of the radio frame in the TTI and the configuration of the first symbol and the second symbol in the first type of radio frame.

[0061] With reference to the second aspect, in a possible implementation, the broadcast message can further include the fourth indication information.

[0062] With reference to the second aspect, in a possible implementation, after the second device receives the broadcast message, the method further includes that the second device (such as a T node) can blindly detect common control information in a control information common search space. The common control information includes the fourth indication information.

[0063] The fourth indication information can refer to the method embodiments below for specific description.

[0064] In a third aspect, a communication apparatus is provided. The communication apparatus can be the first device or a chip in the first device. The communication apparatus is configured to perform the method in the first aspect or any possible implementation of the first aspect. The communication apparatus includes modules configured to perform the method in the first aspect or any possible implementation of the first aspect.

[0065] In a fourth aspect, a communication apparatus is provided. The communication apparatus can be the second device or a chip in the second device. The communication apparatus is configured to perform the method in the second aspect or any possible implementation of the second aspect. The communication apparatus includes modules configured to perform the method in the second aspect or any possible implementation of the second aspect.

[0066] In the third aspect or the fourth aspect, the communication apparatus can include a transceiver module and a processing module. The transceiver module and the processing module can refer to the apparatus embodiments below for specific description. The third aspect and the fourth aspect can refer to the first aspect and the second aspect for specific description, which will not be repeated here.

[0067] In a fifth aspect, a communication method is provided. The method can be applied to the first device, or a chip, a functional module, a processing system or a communication component arranged in the first device. The method is described below by taking the first device as an example. In the present application, the first device can be a master node or a G node. The method includes: the first device (e.g., a G node) generates and sends 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 control information common search space. Correspondingly, the second device can blindly detect the common control information in the control information common search space. The common control information can 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. The time domain resources can be used for the second device to send and / or receive data.

[0068] The present application introduces the third indication information in the common control information to indicate the time domain resources allocated by the first device (e.g., a G node) to the second device (e.g., a T node), and the second device (e.g., a T node) can send and / or receive data on the time domain resources. The occupation ratio of the G link resources and the T link resources within a TTI can be dynamically adjusted, and the diversified services with different time delays and reliability requirements can be flexibly adapted.

[0069] In a possible implementation manner of the fifth aspect, before the first device sends the 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 a TTI length. The broadcast message further includes one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate a length of a cyclic prefix. The radio frame number indication information is used to indicate a frame number of a frame in which a first symbol of the broadcast message is located, or to indicate a number of a radio frame in which the broadcast message is located.

[0070] In an example, the broadcast message can be carried by a PBCH.

[0071] In an example, a total number of bits of the broadcast message can be 64 bits.

[0072] In an example, the TTI length considered in the present application can be various, such as 0.125 ms, 0.25 ms, 0.5 ms, 1 ms, 2 ms, 4 ms, or 8 ms.

[0073] In an example, the cyclic prefix indication information can be 2 bits, which can indicate cyclic prefixes (CPs) of 4 lengths.

[0074] The present application indicates lengths of various TTIs through the first indication information in the broadcast message, dynamically adjusts the TTI length, adapts to devices of different capabilities, and can flexibly adapt to diversified services with different time delays and reliability requirements. In addition, the present application indicates CPs of more lengths through the cyclic prefix indication information in the broadcast message, which is beneficial to application in scenarios of various coverage distances.

[0075] In a sixth aspect, the present application provides a communication method, which can be applied to a second device, or a chip, a functional module, a processing system or a communication component arranged in the second device. Hereinafter, the method is taken as an example applied to the second device. In the present 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. In an example, the second device can blindly detect the common control information in a control information common search space, and after detecting the common control information, the second device can process the common control information. The common control information can include third indication information, which can be used to indicate time domain resources allocated to the second device (such as a T-node) in a TTI. The time domain resources can be used for the second device to send and / or receive data.

[0076] In a possible implementation manner of the sixth aspect, before the second device receives the common control information, the method further includes: receiving, by the second device, a broadcast message, the broadcast message including first indication information. The first indication information is used to indicate a TTI length. The broadcast message further includes one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information is used to indicate a length of a cyclic prefix. The radio frame number indication information is used to indicate a frame number of a frame in which a first symbol of the broadcast message is located, or indicate a number of a radio frame in which the broadcast message is located.

[0077] In an example, the broadcast message can be carried by a PBCH.

[0078] In an example, the broadcast message can have a total bit number of 64 bits.

[0079] In an example, the TTI length considered in the present application can be various, such as 0.125 ms, 0.25 ms, 0.5 ms, 1 ms, 2 ms, 4 ms, or 8 ms.

[0080] In an example, the cyclic prefix indication information can be 2 bits, which can indicate cyclic prefixes (CPs) of 4 lengths.

[0081] In a possible implementation manner of the fifth aspect or the sixth aspect, the third indication information can include a starting symbol index of a time domain resource and an ending symbol index of the time domain resource. Alternatively, the third indication information can include a starting symbol index of a time domain resource and a symbol number of the time domain resource. Alternatively, the third indication information can include an ending symbol index of a time domain resource and a symbol number of the time domain resource.

[0082] In a possible implementation manner of the fifth aspect or the sixth aspect, the third indication information further includes a link type indication, which can be used to indicate that the time domain resource is used for data transmission or reception by the second device. Details about the link type indication can be referred to the foregoing description, and will not be described herein.

[0083] In a possible implementation manner of the fifth aspect or the sixth aspect, the broadcast message can further include second indication information, which can be used to indicate a symbol number N occupied by a control information common search space, N being a positive integer.

[0084] In an example, the control information common search space can occupy N continuous symbols.

[0085] For example, the control information common search space can occupy the first N symbols after the synchronization signal, or the control information common search space can occupy the first N symbols after the identification information, or the control information common search space can occupy the first N symbols after the broadcast message, or the control information common search space can occupy the first N symbols after the reference signal. The descriptions about the synchronization signal, the identification information, and the reference signal can be referred to the foregoing descriptions, and will not be repeated here.

[0086] In a seventh aspect, a communication apparatus, which can be the first device or a chip in the first device, is provided. The communication apparatus is configured to perform the method in the fifth aspect or any possible implementation of the fifth aspect. The communication apparatus comprises modules configured to perform the method in the fifth aspect or any possible implementation of the fifth aspect.

[0087] In an eighth aspect, a communication apparatus, which can be the second device or a chip in the second device, is provided. The communication apparatus is configured to perform the method in the sixth aspect or any possible implementation of the sixth aspect. The communication apparatus comprises modules configured to perform the method in the sixth aspect or any possible implementation of the sixth aspect.

[0088] In the seventh aspect or the eighth aspect, the communication apparatus can comprise a transceiver module and a processing module. The transceiver module and the processing module can be further described in the apparatus embodiments shown below. The advantages of the seventh aspect and the eighth aspect can be referred to the descriptions of the fifth aspect and the sixth aspect, and will not be repeated here.

[0089] In a ninth aspect, a communication apparatus is provided. The communication apparatus comprises a processor configured to perform the method in the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any possible implementation of any of the aspects. The processor is configured to execute a program stored in a memory, and when the program is executed, the method in the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any possible implementation of any of the aspects is performed.

[0090] In combination with the ninth aspect, in a possible implementation, the memory is located outside the communication apparatus.

[0091] In combination with the ninth aspect, in a possible implementation, the memory is located inside the communication apparatus.

[0092] In the embodiments, the processor and the memory can also be integrated into one device, i.e., the processor and the memory can also be integrated together. For example, the communication apparatus can be a chip.

[0093] In a tenth aspect, the present application provides a communication apparatus, which is the first device, or the second device, or a chip therein. The communication apparatus can include a logic circuit and an interface coupled to the logic circuit. The specific description of the logic circuit and the interface can also be referred to the embodiments shown below. The interface is used to interact (or transceive or input and output) information or data, and the logic circuit is used to run program instructions, so that the communication apparatus executes the method described in any possible implementation manner of the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any one of the aspects. The interface can be a communication interface, or a transceiver. The transceiver can be a radio frequency module in the communication apparatus, or a combination of the radio frequency module and an antenna, or an input and output interface of a chip or a circuit.

[0094] In an eleventh aspect, the present application provides a readable storage medium, which stores program instructions, when the program instructions are run on a computer, the computer executes the method described in any possible implementation manner of the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any one of the aspects.

[0095] In a twelfth aspect, the present application provides a computer program product containing program instructions, when the program instructions are run, the method described in any possible implementation manner of the first aspect, or the second aspect, or the fifth aspect, or the sixth aspect, or any one of the aspects is executed.

[0096] In a thirteenth aspect, the present application provides a communication system, which includes the first device and the second device; the first device can be used to execute the method described in any possible implementation manner of the first aspect, or the fifth aspect, or any one of the aspects, and the second device can be used to execute the method described in any possible implementation manner of the second aspect, or the sixth aspect, or any one of the aspects.

[0097] The technical effects achieved by the above aspects can be mutually referred or referred to the beneficial effects in the method embodiments shown below, which will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0098] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0099] FIG. 2 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0100] FIG. 3a is a schematic diagram of a position of symbols occupied by control information common search space according to an embodiment of the present application;

[0101] FIG. 3b is another position of symbols occupied by the control information common search space according to an embodiment of the present application;

[0102] FIG. 4 is another position of symbols occupied by the control information common search space according to an embodiment of the present application;

[0103] FIG. 5a is a frame structure of the first type of radio frame according to an embodiment of the present application;

[0104] FIG. 5b is another frame structure of the first type of radio frame according to an embodiment of the present application;

[0105] FIG. 6a is a radio frame configuration when the TTI length is 0.25 ms according to an embodiment of the present application;

[0106] FIG. 6b is another radio frame configuration when the TTI length is 0.25 ms according to an embodiment of the present application;

[0107] FIG. 7 is a radio frame configuration when the TTI length is 0.5 ms according to an embodiment of the present application;

[0108] FIG. 8 is a radio frame configuration when the TTI length is 1 ms according to an embodiment of the present application;

[0109] FIG. 9 is a radio frame configuration when the TTI length is 2 ms according to an embodiment of the present application;

[0110] FIG. 10a is a radio frame configuration when the TTI length is 4 ms according to an embodiment of the present application;

[0111] FIG. 10b is another radio frame configuration when the TTI length is 4 ms according to an embodiment of the present application;

[0112] FIG. 11a is a radio frame configuration when the TTI length is 8 ms according to an embodiment of the present application;

[0113] FIG. 11b is another radio frame configuration when the TTI length is 8 ms according to an embodiment of the present application;

[0114] FIG. 12 is another radio frame configuration when the TTI length is 0.5 ms according to an embodiment of the present application;

[0115] FIG. 13 is another flow of a communication method according to an embodiment of the present application;

[0116] FIG. 14 is a frame structure of the third indication information according to an embodiment of the present application;

[0117] FIG. 15 is a structure of a communication apparatus according to an embodiment of the present application;

[0118] FIG. 16 is another structure diagram of a communication device according to an embodiment of the present application;

[0119] FIG. 17 is still another structure diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0120] In the description of the present application, "first" and "second" are used only to distinguish different objects, and are not used to describe a specific order. In addition, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this document is only a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean: A alone, A and B exist at the same time, and B alone. In addition, "at least one" means one or more, and "multiple" means two or more. "One or more" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: 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.

[0121] The terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device, etc. including a series of steps or units, is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally also includes other steps or units inherent to these processes, methods, products, or devices, etc.

[0122] In the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design scheme described as "exemplary", "for example" or "for instance" in the present application should not be construed as more preferred or advantageous than other embodiments or design schemes. Rather, the use of "exemplary", "for example" or "for instance" is intended to present the relevant concept in a specific manner.

[0123] In the present application, "indication" can include direct indication, indirect indication, display indication, and implicit indication. When describing that a certain information is used to indicate A, it can be understood that the information carries A, directly indicates A, or indirectly indicates A.

[0124] In the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information is XX, which can include direct transmission through the air interface, and also includes indirect transmission through the air interface by other units or modules. "Receiving information from YY" can be understood as the source of the information is YY, which can include direct reception from YY through the air interface, or indirect reception from YY through the air interface from other units or modules. "Sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. In other words, sending and receiving can be 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 a device through a bus, wire or interface.

[0125] The following describes the nodes and systems involved in the present application.

[0126] The technical solutions provided by the present application support spark link / nearlink protocols, such as spark low energy (SLE) wireless communication protocol, spark base (SLB) wireless communication protocol. Alternatively, the technical solutions provided by the present application support IEEE protocols, such as IEEE 802.11be / WiFi 7 / EHT (extremely high throughput) protocol, IEEE 802.11bn / WiFi 8 / UHR (ultra high reliability) protocol, IEEE IMMW (Integrated mmWave) protocol, IEEE 802.15.4ab / UWB (ultra wideband) protocol, IEEE 802.11bf / Sensing (sensing) protocol, etc.

[0127] The node in this application can refer to a device with communication capability, which can include but is not limited to at least one of user equipment, network equipment, industrial equipment, etc., or it can be a chip or functional module supporting the above-mentioned equipment, etc. For example, user equipment includes at least one of the following: handheld terminal, wearable terminal, vehicle, vehicle-mounted device, sensing device, smart home device, or leisure and entertainment device. Among them, the handheld terminal includes but is not limited to mobile phone, tablet, notebook computer, etc.; wearable device includes but is not limited to earphone, smart bracelet, smart watch, or smart glasses, etc.; vehicle includes but is not limited to vehicle, ship, aircraft, rail transit (such as subway, high-speed rail, etc.), or logistics robot (such as automated guided vehicle (AGV)), etc.; vehicle-mounted device includes but is not limited to domain controller (DC), screen, microphone, sound, electronic key, keyless entry, starting system controller, battery management system (BMS), battery pack, or battery cell, etc.; sensing device includes but is not limited to camera, radar, laser radar, light sensor, temperature sensor, or humidity sensor, etc.; smart home device includes but is not limited to projector, smart TV, smart refrigerator, smart home gateway, or security device, etc.; leisure and entertainment device includes but is not limited to virtual reality (VR) device, mixed reality (MR) device, massage chair, home theater, game control device or 4D cinema cabin, etc. Network equipment includes but is not limited to router, switch, or base station, etc. Industrial equipment includes but is not limited to industrial robot, or mechanical arm, etc. Of course, in addition to the above-mentioned various forms of equipment, the node can also be a chip or functional module or processing system that can be arranged in the above-mentioned equipment.

[0128] It can be understood that in some application scenarios or some network types, similar devices with communication capability may not be called nodes, but for the convenience of description, the devices with communication capability in the embodiments of the present application are collectively referred to as nodes.

[0129] A communication system is a system for transmitting information by using electrical or optical signals, which usually includes multiple nodes that communicate with each other to transmit information. The nodes in a communication system can have different identities (or roles) and / or different capabilities. On one hand, it is convenient to manage the system with multiple nodes, and on the other hand, it is necessary to be compatible with nodes with different computing and communication capabilities. In most communication systems, nodes are divided into master nodes and slave nodes, and the master nodes can communicate with each other and with the slave nodes to implement various functions. The master node can also be referred to as a grant node or an access point (AP) or an authorized node or a master node or a base station, etc. The slave node can also be referred to as a terminal node or a station (STA) or a user equipment (UE), etc. The specific names of the grant node and the terminal node are not limited in the embodiments of the present application, and for the convenience of description, the grant node and the terminal node are taken as examples for description.

[0130] For example, the grant node can have communication capability and management capability, and the management capability includes communication management capability, such as connection management, resource scheduling, or information security management. For example, the grant node can send resource management information or data scheduling information, such as access layer resource management information.

[0131] For example, the terminal node can have communication capability and can communicate with the grant node for service transmission. For example, the terminal node is a node that receives resource management information (such as access layer resource management information) or data scheduling information and transmits data according to the resource management information or the data scheduling information. For example, the terminal node can include a barcode, a radio frequency identification (RFID), a sensor, a global positioning system (GPS), a laser radar, a battery, etc.

[0132] It can be understood that the identities of the grant node and the terminal node are relative, and are only for the convenience of distinguishing the operations of the nodes in a possible connection situation and for the convenience of making the exemplary naming. In some scenarios, when a node belongs to two or more communication domains at the same time, it can act as a terminal node in some communication domains and as a grant node in another communication domain.

[0133] Referring to FIG. 1, FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. The communication system can include one or more G nodes and one or more T nodes. FIG. 1 shows one G node and two T nodes as an example. One G node can be connected with one or more T nodes, and G nodes can also be connected with each other, and T nodes can also be connected with each other.

[0134] The G node can establish a link with one or more T nodes to implement various functions. The link between the G node and the T node can be referred to as a "G-T link", which can be used for communication between the G node and the T node, or for sensing / ranging, etc. between the G node and the T node. The embodiments of the present application do not limit the role of the G-T link.

[0135] It can be understood that the number of G nodes and / or the number of T nodes shown in FIG. 1 is only an example, and should not be construed as a limitation on the embodiments of the present application.

[0136] The following introduces technical terms related to the present application to facilitate understanding by those skilled in the art.

[0137] I. Communication domain, G symbol, T symbol, transmission time interval (TTI), radio frame, super frame

[0138] In a specific application scenario, one G node can manage one or more T nodes, and the G node and the T nodes connected thereto jointly complete a specific communication function. The G node and the one or more T nodes connected thereto can jointly form a "communication domain".

[0139] The G symbol can represent a symbol transmitted by the G node to the T node (G link). The T symbol can represent a symbol transmitted by the T node to the G node (T link). The G symbol can also be referred to as a G link symbol, and the two can be used interchangeably in the present application. The T symbol can also be referred to as a T link symbol, and the two can be used interchangeably in the present application. The G symbol can also be referred to as a downlink symbol, and the T symbol can also be referred to as an uplink symbol.

[0140] The transmission time interval (TTI) can represent a unit time for one transceiving interaction between the G node and the T node. One TTI can include one or more radio frames.

[0141] The radio frame in the present application can also be referred to as "frame" for short, which can include a plurality of time domain symbols. A super frame can include a plurality of radio frames.

[0142] II. Broadcast information

[0143] The broadcast information includes 63 bits in total, part of which indicates as shown in the following Table 1. Table 1 includes radio frame symbol allocation information, which is indicated by 4 bits to indicate 14 frame structures (i.e. G symbol T symbol configuration in 1 radio frame).

[0144] Table 1

[0145] The star flash system adopts time division duplexing (TDD), and each super frame includes 48 radio frames in the prior art, and the duration of each super frame is 1 ms (millisecond).

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

[0147] When a normal cyclic prefix is adopted, the radio frame supports 14 configurations of G symbols and T symbols, as shown in the following Table 2. When an extended cyclic prefix is adopted, the radio frame supports 12 configurations of G symbols and T symbols, as shown in the following Table 3. The flexible G / T symbol configuration can meet the requirements of different link direction service rates in different application scenarios.

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

[0149] Table 3: Radio frame structure based on extended cyclic prefix configuration

[0150] The following introduces the method involved in the application.

[0151] The embodiment of the application provides a communication method and device and readable storage medium, by designing system message, variable length transmission time interval (TTI) can be supported, so as to adapt to devices with different capabilities and flexibly adapt to services with different time delays and reliability requirements.

[0152] In this application, the same or similar parts among various embodiments or implementation manners can be mutually referred to, unless otherwise specified. In various embodiments of this application, and various implementation manners / implementation methods / implementation approaches in each embodiment, the terms and / or descriptions among different embodiments, and various implementation manners / implementation methods / implementation approaches in each embodiment are consistent and can be mutually referred to, unless otherwise specified and in conflict with logic. The technical features in different embodiments, and various implementation manners / implementation methods / implementation approaches in each embodiment can be combined to form new embodiments, implementation manners, implementation methods, or implementation approaches according to their inherent logical relationship. The implementation manners of this application described below do not constitute a limitation on the protection scope of this application.

[0153] In a possible implementation manner, 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. Wherein, the description about the G node and the T node can be referred to the above, which will not be repeated here. For the convenience of description, the G node and the T node are taken as an example for description below.

[0154] In a possible implementation manner, 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. Wherein, the G link symbol can be understood as a symbol sent on the G link, and the G link can be understood as a link in the direction from the first device to the second device. The T link symbol can be understood as a symbol sent on the T link, and the T link can be understood as a link in the direction from the second device to the first device.

[0155] Referring to FIG. 2, FIG. 2 is a flow diagram of a communication method provided by an embodiment of this application. As shown in FIG. 2, the communication method includes but is not limited to:

[0156] S101, a first device (such as a G node) generates a broadcast message.

[0157] S102, the first device (such as a G node) sends (for example, broadcasts) the broadcast message, which includes first indication information, the first indication information being used to indicate the length of a TTI.

[0158] Correspondingly, the second device (such as a T node) receives the broadcast message.

[0159] S103, the second device (e.g., a T-node) processes the broadcast message.

[0160] In a possible implementation, the broadcast message can be carried by a physical broadcast channel (PBCH). The broadcast message can include first indication information, which can be used to indicate a length of a transmission time interval (TTI). For example, the TTI length considered by the embodiments of the present application can include one or more of the following: 0.125 milliseconds (ms), 0.25 milliseconds (ms), 0.5 milliseconds (ms), 1 milliseconds (ms), 2 milliseconds (ms), 4 milliseconds (ms), or 8 milliseconds (ms).

[0161] The embodiments of the present application indicate the lengths of multiple TTIs through the first indication information in the broadcast message, and dynamically adjust the TTI length to adapt to devices with different capabilities, and flexibly adapt to diversified services with different delay and reliability requirements.

[0162] In a possible implementation, the broadcast message further includes 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 a frame number of a frame in which a first symbol of the broadcast message is sent. The cyclic prefix indication information can be used to indicate a length of a cyclic prefix (CP). For example, the cyclic prefix indication information can be 2 bits, which can indicate 4 lengths of CP. For the specific indication manner of the radio frame number indication information and the cyclic prefix indication information, refer to the description below.

[0163] The embodiments of the present application indicate more lengths of CP through the cyclic prefix indication information in the broadcast message, which is beneficial to be applied to scenarios with multiple different coverage distances.

[0164] In a possible implementation, the broadcast message can further include second indication information, which can be used to indicate a number N of symbols occupied by the control information common search space. N is a positive integer. The control information common search space can also be referred to as a control channel common search space, or a control information common search resource, or a control information communication domain common resource, or a control information common resource, or a control channel common search resource, which will not be repeated hereinafter. For example, the control information common search space can be a G-link control information communication domain common resource, or a G-link control information common resource in short. The G-link control information can also be referred to as common control information. Accordingly, the common control information can occupy part or all of the time domain resources of the control information common search space. One or more T nodes served by a G node can detect the common control information in the control information common search space. For example, the common control information can be used to indicate scheduling information required for transmitting a system message, including time-frequency resources used for transmitting the system message.

[0165] In a possible implementation, the control information common search space can occupy N consecutive symbols. The positions of the N symbols can be indicated by a standard predefinition or an implicit manner, without additional bit overhead. The positions of the N symbols can be located after the last symbol of a symbol (which can be one or more) occupied by a synchronization signal, a symbol (which can be one or more) occupied by identification information, a symbol (which can be one or more) occupied by the broadcast message, or a symbol (which can be one or more) occupied by a reference signal. In other words, the control information common search space can occupy N consecutive symbols immediately after the synchronization signal, or the control information common search space can occupy N consecutive symbols immediately after the identification information, or the control information common search space can occupy N consecutive symbols immediately after the broadcast message, or the control information common search space can occupy N consecutive symbols immediately after the reference signal. The symbol involved in the embodiments of the present application can be understood as a time domain symbol.

[0166] The synchronization signal can be understood as a signal carrying a synchronization sequence. The symbol occupied by the synchronization signal can also be referred to as a synchronization symbol. The synchronization sequence can include one or more of the following: a first training sequence (FTS), a second training sequence (STS), or a third training sequence (TTS). The identification information can be used to identify the first device (e.g., a G node). For example, the identification information can include an identifier of the first device (e.g., a G node identifier). Of course, the identification information can also include other content. In other words, the identification information can be used to implement other functions in addition to identifying the first device. The embodiments of the present application do not limit this. The reference signal can be located in the first M symbols in a TTI. For example, the typical value of M can be 1. The value of M can be predefined by the system or indicated by the identification information or the broadcast message. In some scenarios, the reference signal can be used for channel estimation. Of course, the reference signal can also be used to implement other functions. The embodiments of the present application do not limit this.

[0167] For example, referring to FIG. 3a, FIG. 3a is a schematic diagram of a position of a symbol occupied by a control information common search space according to an embodiment of the present application. Referring to FIG. 3b, FIG. 3b is another schematic diagram of a position of a symbol occupied by a control information common search space according to an embodiment of the present application. FIG. 3a and FIG. 3b show possible positions of a control information common search space (referred to as a common search space for brevity) in the time domain. The difference between FIG. 3a and FIG. 3b includes: in FIG. 3a, the period of the broadcast message and the synchronization block are the same, both being 8 ms; in FIG. 3b, the period of the broadcast message and the synchronization block are different, the period of the broadcast message being 8 ms and the period of the synchronization block being 2 ms. In the embodiments of the present application, the synchronization block can include a synchronization signal and identification information, which will not be described below. Here, the synchronization signal includes a first training sequence (FTS), a second training sequence (STS), and a third training sequence (TTS) as an example. FIG. 3a and FIG. 3b are both examples in which the length of a TTI is 1 ms. Of course, in actual applications, the length of a TTI can be other values. This is merely an example.

[0168] As shown in FIG. 3a and FIG. 3b, when a TTI contains a broadcast message, the symbols occupied by the broadcast message are located after the symbols occupied by the synchronization block, the control information common search space can occupy the N consecutive symbols next to the last symbol of the broadcast message in the TTI. When a TTI does not contain a synchronization block and does not contain a broadcast message, the control information common search space can occupy the N consecutive symbols next to the reference signal (RS) in the TTI. The reference signal can be located in the first M symbols (a typical value of M is 1) of the first frame in a TTI. When a TTI contains identification information but does not contain a broadcast message, and the symbols occupied by the identification information are located after the symbols occupied by the synchronization signal, the control information common search space can occupy the N consecutive symbols next to the identification information in the TTI (as shown in FIG. 3b). When a TTI contains identification information but does not contain a broadcast message, and the symbols occupied by the identification information are not located after the symbols occupied by the synchronization signal (for example, the symbols occupied by the identification information are between the symbols occupied by the synchronization signal, as shown in FIG. 3b), the control information common search space can occupy the N consecutive symbols next to the last symbol of the synchronization signal in the TTI. In short, when a TTI contains identification information and a synchronization signal, and does not contain a broadcast message, the control information common search space can be located after the identification information and the synchronization signal, and is N consecutive symbols next to the identification information and the synchronization signal.

[0169] For another example, referring to FIG. 4, FIG. 4 is another position of symbols occupied by the control information common search space according to an embodiment of the present application. In FIG. 4, the period of the broadcast message is different from the period of the synchronization block, the period of the broadcast message is 4 ms, and the period of the synchronization block is 2 ms. Here, the synchronization block includes a synchronization signal and identification information. Taking the synchronization signal including a first training sequence (FTS), a second training sequence (STS), and a third training sequence (TTS) as an example. FIG. 4 takes the length of a TTI as 1 ms as an example, of course, in actual application, the length of the TTI can be other values, which are only examples here.

[0170] As shown in FIG. 4, when a TTI contains a synchronization block, whether or not it contains a broadcast message, the control information common search space (denoted as common search space in the figure for simplicity) can occupy the last N symbols immediately after the symbols occupied by the FTS, the STS, the TTS, and the identification information. If the TTI contains a broadcast message, the symbols occupied by the broadcast message are not located after the symbols occupied by the synchronization signal and the identification information, for example, the symbols occupied by the broadcast message can be located before the symbols occupied by the FTS, the STS, the TTS, or the identification information, and in FIG. 4, the symbols occupied by the broadcast message are located before the symbols occupied by the TTS. When a TTI does not contain a synchronization block and does not contain a broadcast message, the control information common search space can occupy the N symbols immediately after the reference signal (RS) in the TTI. The reference signal can be located in the first M symbols (a typical value of M is 1) of the first frame in the TTI. When a TTI contains a broadcast message but does not contain a synchronization block, the control information common search space can occupy the N symbols immediately after the last symbol of the broadcast message in the TTI, which is not shown in FIG. 4.

[0171] It can be understood that in the above FIG. 3a, FIG. 3b, and FIG. 4, the FTS, the STS, the TTS, the identification information, and the broadcast message each occupy 1 symbol as an example, and in actual application, a plurality of symbols can also be occupied. For example, the identification information occupies 2 symbols, and the broadcast message occupies 2 symbols. In addition, in the above FIG. 3a, FIG. 3b, and FIG. 4, the control information common search space occupies 1 symbol as an example, and in actual application, the control information common search space can occupy N symbols, where N is an integer greater than or equal to 1.

[0172] In some scenarios, after the first device (such as a G node) transmits the broadcast message, the first device can transmit common control information in the above control information common search space. It can be understood that transmitting common control information in the control information common search space means transmitting common control information on all or part of the symbols occupied by the control information common search space. For example, assuming that the above control information common search space occupies 8 symbols (i.e., N is equal to 8), and when transmitting common control information, only 2 symbols of the 8 symbols can be used. All second devices (such as T nodes) connected to the first device (such as a G node) or all second devices (such as T nodes) served by the first device (such as a G node) can blindly detect common control information on the N symbols occupied by the above control information common search space, and if the common control information is detected, the common control information can be demodulated. Exemplarily, a resource (including a time domain resource and / or a frequency domain resource) carrying the common control information can be referred to as a common G node control indicator (GCI) resource, which is not limited in the present application.

[0173] It can be understood that in the prior art, the G-link control information communication domain common resource is used in the last system overhead symbol in each wireless frame in the N consecutive wireless frames starting from the wireless frame next to the wireless frame in which the STS signal is sent in the superframe. Therefore, the transmission symbol of the G-link control information is relatively scattered, and the demodulation delay of the receiving end is increased. In the embodiment of the present application, the symbol position occupied by the control information common search space is continuous, and the symbol occupied by the control information common search space is located as early as possible in a TTI. Compared with the prior art in which the transmission is scattered in multiple wireless frames, the control information common search space is beneficial to the receiving end to blindly detect the common control information in the control information common search space faster, and reduce the processing delay.

[0174] In a possible implementation, the broadcast message can further include fifth indication information, which can be used to indicate the number of consecutive TTIs in which the system message is used in a sending period. In other words, the fifth indication information can be used to indicate how many consecutive TTIs in which the system message is sent from the starting wireless frame number. The system message can be carried by a data channel, for example, carried by a physical downlink shared channel (PDSCH). For example, the system message can be a system information block 0 (SIB0).

[0175] For example, the broadcast message of the embodiment of the present application can include but is not limited to one or more indication information (or called indication subfield) in the following Table 4. For example, the total number of bits of the broadcast message can be 64 bits.

[0176] Table 4

[0177] It can be understood that the correspondence between the bit value of each indication information in the above Table 4 and its meaning is only an example, and in actual application, the bit value of each indication information and its meaning can have other mapping relationship, which is not limited by the embodiment of the present application. Taking the cyclic prefix indication information as an example, the bit value “0” can be used to indicate the cyclic prefix 0, and any one of the bit values “1”, “2”, “3” can be used to indicate the cyclic prefix 0, which is not limited by the embodiment of the present application.

[0178] It can be understood that the cyclic prefix 0, the cyclic prefix 1, the cyclic prefix 2 and the cyclic prefix 3 in the above Table 4 can represent four cyclic prefixes with different lengths. For example, the length of the cyclic prefix 0 is about 0.586 microseconds (us), the length of the cyclic prefix 1 is about 1.270 microseconds (us), the length of the cyclic prefix 2 is about 2.083 microseconds (us), and the length of the cyclic prefix 3 is about 4.167 microseconds (us). It should be noted that the lengths of the above cyclic prefixes are approximate values, for example, the values after rounding.

[0179] It can be understood that the frame length of one radio frame in the embodiments of the present application is taken as an example of 0.125 ms (i.e. 125 us), and when the length of the TTI is different, the configuration of the radio frames (including the number and / or the type of the radio frames) contained in one TTI is also different.

[0180] For the length of the TTI indicated by the first indication information in the above broadcast message, the possible radio frame configuration in the TTI of different lengths (or the structure of the TTI of different lengths) is introduced as follows.

[0181] (1) The length of the TTI is 0.125 ms

[0182] At this time, one TTI includes one radio frame. The radio frame is a first type of radio frame, which is also referred to as a special radio frame (SF) in the embodiments of the present application. The first type of radio frame (or the special radio frame SF) can 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 (such as a G node) to a second device (such as a T node), and the second symbol is a symbol sent by the second device (such as the T node) to the first device (such as the G node). The first symbol and the second symbol are described above and will not be described here in detail.

[0183] For example, the first symbol is G symbol and the second symbol is T symbol. Referring to FIG. 5a, FIG. 5a is a schematic diagram of a frame structure of the first type of radio frame according to an embodiment of the present application. As shown in FIG. 5a, a special radio frame SF (i.e. the first type of radio frame) can include X G symbols, Y T symbols, and a guard interval (GAP). X and Y are positive integers. The guard interval can be located between the G symbols and the T symbols of the special radio frame, for example, after the last G symbol and before the first T symbol of the special radio frame. The value of X+Y can correspond to different lengths of cyclic prefix, respectively. In one possible implementation, when the length of cyclic prefix is 0.586 microseconds, the value of X+Y can be 13; when the length of cyclic prefix is 1.270 microseconds, the value of X+Y can be 12; when the length of cyclic prefix is 2.083 microseconds, the value of X+Y can be 11; and when the length of cyclic prefix is 4.167 microseconds, the value of X+Y can be 9.

[0184] For example, the first symbol is G symbol and the second symbol is T symbol. Referring to FIG. 5b, FIG. 5b is another schematic diagram of a frame structure of the first type of radio frame according to an embodiment of the present application. As shown in FIG. 5b, a special radio frame SF (i.e. the first type of radio frame) can include X G symbols, Y T symbols, and two guard intervals (e.g. GAP). X and Y are positive integers. One of the two guard intervals is located between the G symbols and the T symbols of the special radio frame (e.g. after the last G symbol and before the first T symbol of the special radio frame), and the other guard interval is located after the last symbol. In one possible implementation, when the length of cyclic prefix is 0.586 microseconds, the value of X+Y can be 12; when the length of cyclic prefix is 1.270 microseconds, the value of X+Y can be 11; when the length of cyclic prefix is 2.083 microseconds, the value of X+Y can be 10; and when the length of cyclic prefix is 4.167 microseconds, the value of X+Y can be 8.

[0185] It can be understood that the length of the guard interval is not limited in the embodiments of the present application.

[0186] For example, the configuration of the first symbol (e.g., G symbol) and the second symbol (e.g., T symbol) in a special radio frame (i.e., the first type of radio frame) can include one or more of the following Tables 5 to 10. Table 5 shows the possible configuration of the G symbol and the T symbol in the special radio frame (i.e., the first type of radio frame) when X+Y is equal to 13. Table 6 shows the possible configuration of the G symbol and the T symbol in the special radio frame (i.e., the first type of radio frame) when X+Y is equal to 12. Table 7 shows the possible configuration of the G symbol and the T symbol in the special radio frame (i.e., the first type of radio frame) when X+Y is equal to 11. Table 8 shows the possible configuration of the G symbol and the T symbol in the special radio frame (i.e., the first type of radio frame) when X+Y is equal to 10. Table 9 shows the possible configuration of the G symbol and the T symbol in the special radio frame (i.e., the first type of radio frame) when X+Y is equal to 9. Table 10 shows the possible configuration of the G symbol and the T symbol in the special radio frame (i.e., the first type of radio frame) when X+Y is equal to 8.

[0187] Table 5

[0188] Table 6

[0189] Table 7

[0190] Table 8

[0191] Table 9

[0192] Table 10

[0193] It can be understood that the above Tables 5 to 10 are described by taking the G symbol and the T symbol as examples. In actual applications, the G symbol can be replaced by the first symbol, and the T symbol can be replaced by the second symbol.

[0194] (2) The length of the TTI is 0.25 ms

[0195] At this time, two radio frames are included in one TTI. The two radio frames can be the same type of radio frame, such as both being the second type of radio frame; or can be different types of radio frames, such as the first radio frame being the second type of radio frame and the second radio frame being the first type of radio frame. In the embodiments of the present application, the second type of radio frame is also referred to as a G node frame (GF) or a downlink frame. The first type of radio frame (or special frame SF) can include a first symbol, a second symbol, and at least one guard interval (GAP). For example, the configuration of the first symbol and the second symbol in the first type of radio frame can be any one of the configurations in Tables 5 to 10. The second type of radio frame (or GF) includes only the first symbol. The first symbol is a symbol transmitted by a first device (such as a G node) to a second device (such as a T node), and the second symbol is a symbol transmitted by the second device (such as a T node) to the first device (such as a G node). The first symbol and the second symbol are described above.

[0196] For example, referring to FIG. 6a, FIG. 6a is a schematic diagram of a radio frame configuration when the length of a TTI is 0.25 ms according to an embodiment of the present application. As shown in FIG. 6a, one TTI includes one first type of radio frame (or SF) and one second type of radio frame (or GF), where the first radio frame is a GF and the second radio frame is an SF. The second radio frame includes two guard intervals. In other words, when the last radio frame in one TTI is a first type of radio frame, the last radio frame includes two guard intervals.

[0197] For example, referring to FIG. 6a, FIG. 6a is a schematic diagram of a radio frame configuration when the length of a TTI is 0.25 ms according to an embodiment of the present application. As shown in FIG. 6a, one TTI includes one first type of radio frame (or SF) and one second type of radio frame (or GF), where the first radio frame is a GF and the second radio frame is an SF. The second radio frame includes two guard intervals. In other words, when the last radio frame in one TTI is a first type of radio frame, the last radio frame includes two guard intervals.

[0198] For example, one GF frame (i.e., a second type of radio frame) can include X first symbols (such as G symbols), where X is a positive integer. The value of X can correspond to different lengths of a cyclic prefix. For example, when the length of the cyclic prefix is 0.586 microseconds, the value of X can be 14; when the length of the cyclic prefix is 1.270 microseconds, the value of X can be 13; when the length of the cyclic prefix is 2.083 microseconds, the value of X can be 12; and when the length of the cyclic prefix is 4.167 microseconds, the value of X can be 10. Details are not described herein.

[0199] (3) The length of the TTI is 0.5 ms

[0200] At this time, 4 radio frames are included in one TTI. The 4 radio frames can all be the second type of radio frame, or the 4 radio frames can include the first type of radio frame and the second type of radio frame, or the 4 radio frames can include the first type of radio frame, the second type of radio frame, and the third type of radio frame. In the embodiment of the present application, the third type of radio frame is also referred to as a T node frame (TF) or an uplink frame. The first type of 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 symbol and the second symbol in the first type of radio frame can be any one of the configurations in the foregoing Tables 5 to 10. The second type of radio frame (or GF) includes only the first symbol. The third type of radio frame (or TF) includes only the second symbol. The first symbol is a symbol transmitted by a first device (such as a G node) to a second device (such as a T node), and the second symbol is a symbol transmitted by the second device (such as a T node) to the first device (such as a G node). The first symbol and the second symbol are described above.

[0201] For example, referring to FIG. 7, FIG. 7 is a schematic diagram of radio frame configuration when the TTI length is 0.5 ms according to an embodiment of the present application. As shown in FIG. 7, 4 radio frames are included in one TTI, the first radio frame among the 4 radio frames is the second type of radio frame (or GF), and at most 1 first type of radio frame (or SF) is included in the 4 radio frames. As shown in FIG. 7, when the TTI length is 0.5 ms, there are 4 radio frame configurations in the TTI, which are indicated by indexes 0 to 3. If the last radio frame in the TTI is the first type of radio frame (or SF), the last radio frame includes two guard intervals, and the second guard interval is located after the last symbol of the last radio frame. If the first type of radio frame (or SF) is not located at the end of the TTI, the first type of radio frame (or SF) can include one guard interval, which can be located between the first symbol and the second symbol of the first type of radio frame (or SF). If the last radio frame in the TTI is the third type of radio frame (or TF), a guard interval is located after the last second symbol of the last radio frame. Here, the guard interval can be outside the last radio frame (such as TF) but in the TTI, or the guard interval can be understood as part of the last radio frame (such as TF). The embodiment of the present application does not make any limitation.

[0202] For example, one TF frame (i.e., the third type of radio frame) can include Y second symbols (e.g., T symbols), Y being a positive integer. The value of Y can correspond to different cyclic prefix lengths, respectively. In one possible implementation, when the length of the cyclic prefix is 0.586 microseconds, Y can be 14; when the length of the cyclic prefix is 1.270 microseconds, Y can be 13; when the length of the cyclic prefix is 2.083 microseconds, Y can be 12; and when the length of the cyclic prefix is 4.167 microseconds, Y can be 10. Details are not described herein.

[0203] (4) The length of the TTI is 1 ms

[0204] In this case, one TTI includes 8 radio frames. The 8 radio frames can all be the second type of radio frame, or the 8 radio frames can include the first type of radio frame and the second type of radio frame, or the 8 radio frames can include the first type of radio frame, the second type of radio frame, and the third type of radio frame. Details about the first type of radio frame (or special radio frame SF), the second type of radio frame (or GF), and the third type of radio frame (or TF) are described above and are not repeated here.

[0205] For example, referring to FIG. 8, which is a schematic diagram of radio frame configuration when the length of the TTI is 1 ms according to an embodiment of the present application. As shown in FIG. 8, one TTI includes 8 radio frames, the first radio frame of the 8 radio frames is the second type of radio frame (or GF), and the 8 radio frames include at most one first type of radio frame (or SF). As shown in FIG. 8, when the length of the TTI is 1 ms, there are 8 radio frame configurations in the TTI, which are represented by indexes 0 to 7. If the last radio frame in the TTI is the first type of radio frame (or SF), the last radio frame includes two guard intervals, and the second guard interval is located after the last symbol of the last radio frame. If the first type of radio frame (or SF) is not located at the end of the TTI, the first type of radio frame (or SF) can include one guard interval, which can be located between the first symbol and the second symbol of the first type of radio frame (or SF). If the last radio frame in the TTI is the third type of radio frame (or TF), there is one guard interval after the last second symbol of the last radio frame. Here, the guard interval can be outside the last radio frame (e.g., TF) but within the TTI, or the guard interval can be understood as part of the last radio frame (e.g., TF). The present application does not limit this.

[0206] (5) The length of the TTI is 2 ms

[0207] At this time, 16 radio frames are included in one TTI. The 16 radio frames can all be the second type of radio frame, or the 16 radio frames can include the first type of radio frame and the second type of radio frame, or the 16 radio frames can include the first type of radio frame, the second type of radio frame, and the third type of radio frame. Details about the first type of radio frame (or special radio frame SF), the second type of radio frame (or GF), and the third type of radio frame (or TF) are described above and will not be repeated here.

[0208] For example, referring to FIG. 9, FIG. 9 is a schematic diagram of radio frame configuration when the length of a TTI is 2 ms according to an embodiment of the present application. As shown in FIG. 9, 16 radio frames are included in one TTI, the first radio frame among the 16 radio frames is the second type of radio frame (or GF), and at most one first type of radio frame (or SF) is included in the 16 radio frames. As shown in FIG. 9, when the length of a TTI is 2 ms, there are 16 radio frame configurations in the TTI, which are represented by indexes 0 to 15. If the last radio frame in the TTI is the first type of radio frame (or SF), the last radio frame includes two guard intervals, and the second guard interval is located after the last symbol of the last radio frame. If the first type of radio frame (or SF) is not located at the end of the TTI, the first type of radio frame (or SF) can include one guard interval, which can be located between the first symbol and the second symbol of the first type of radio frame (or SF). If the last radio frame in the TTI is the third type of radio frame (or TF), a guard interval is located after the last second symbol of the last radio frame. Here, the guard interval can be outside the last radio frame (such as TF) but in the TTI, or the guard interval can be understood as part of the last radio frame (such as TF). Embodiments of the present application do not make any limitation.

[0209] (6) The length of a TTI is 4 ms

[0210] At this time, 32 radio frames are included in one TTI. The 32 radio frames can all be the second type of radio frame, or the 32 radio frames can include the first type of radio frame and the second type of radio frame, or the 32 radio frames can include the first type of radio frame, the second type of radio frame, and the third type of radio frame. Details about the first type of radio frame (or special radio frame SF), the second type of radio frame (or GF), and the third type of radio frame (or TF) are described above and will not be repeated here.

[0211] For example, refer to FIG. 10a, which is a schematic diagram of a radio frame configuration when the length of a TTI is 4 ms according to an embodiment of the present application. Refer to FIG. 10b, which is another schematic diagram of a radio frame configuration when the length of a TTI is 4 ms according to an embodiment of the present application. As shown in FIG. 10a and FIG. 10b, 32 radio frames are included in one TTI, the first radio frame among the 32 radio frames is a second type radio frame (or GF), and at most one first type radio frame (or SF) is included in the 32 radio frames. As shown in FIG. 10a and FIG. 10b, when the length of a TTI is 4 ms, 16 radio frame configurations are considered in the TTI, which are represented by indexes 0 to 15. The difference between FIG. 10a and FIG. 10b is that the radio frame configuration shown in FIG. 10b includes a case in which all the 32 radio frames are second type radio frames (or GFs).

[0212] In the case in which the last radio frame in a TTI is a first type radio frame (or SF), the last radio frame includes two guard intervals, and the second guard interval is located after the last symbol of the last radio frame. In the case in which the first type radio frame (or SF) is not located at the end of a TTI, the first type radio frame (or SF) can include one guard interval, which can be located between the first symbol and the second symbol of the first type radio frame (or SF). In the case in which the last radio frame in a TTI is a third type radio frame (or TF), one guard interval is located after the last second symbol of the last radio frame. Here, the guard interval can be located outside the last radio frame (such as TF), but within the TTI; or the guard interval can be understood as a part of the last radio frame (such as TF). The embodiments of the present application do not make any limitation.

[0213] (7) The length of a TTI is 8 ms

[0214] At this time, 64 radio frames are included in one TTI. The 64 radio frames can all be second type radio frames, or the 64 radio frames can include first type radio frames and second type radio frames, or the 64 radio frames can include first type radio frames, second type radio frames, and third type radio frames. The descriptions of the first type radio frame (or SF), the second type radio frame (or GF), and the third type radio frame (or TF) are the same as those described above, and will not be repeated here.

[0215] For example, refer to FIG. 11a, which is a schematic diagram of a radio frame configuration when the TTI length is 8 ms according to an embodiment of the present application. Refer to FIG. 11b, which is another schematic diagram of a radio frame configuration when the TTI length is 8 ms according to an embodiment of the present application. As shown in FIG. 11a and FIG. 11b, a TTI includes 64 radio frames, the first radio frame of the 64 radio frames is a second type radio frame (or GF), and the 64 radio frames include at most one first type radio frame (or SF). As shown in FIG. 11a and FIG. 11b, when the TTI length is 4 ms, 16 radio frame configurations are considered in the TTI, which are represented by indexes 0 to 15. The difference between FIG. 11a and FIG. 11b is that the radio frame configuration shown in FIG. 11b includes a case where all the 64 radio frames are second type radio frames (or GF).

[0216] In the case where the last radio frame in a TTI is a first type radio frame (or SF), the last radio frame includes two guard intervals, and the second guard interval is located after the last symbol of the last radio frame. In the case where the first type radio frame is not located at the end of a TTI, the first type radio frame (or SF) can include one guard interval, which can be located between the first symbol and the second symbol of the first type radio frame (or SF). In the case where the last radio frame in a TTI is a third type radio frame (or TF), there is a guard interval after the last second symbol of the last radio frame. Here, the guard interval can be outside the last radio frame (such as TF), but within the TTI; or the guard interval can be considered as a part of the last radio frame (such as TF). The embodiments of the present application do not make any limitation.

[0217] It can be understood that the above divides the radio frames into three types (such as first type radio frame, second type radio frame, and third type radio frame) to introduce the possible radio frame configurations in different TTI lengths, and there can be multiple radio frames in a TTI. However, in actual application, there can be only one radio frame.

[0218] In a possible implementation, the configuration of the first symbol (such as G symbol) and / or the second symbol (such as T symbol) in the radio frame can be various. The radio frame can include only the first symbol (such as G symbol), or only the second symbol (such as T symbol), or both the first symbol and the second symbol and the guard interval. There can be one or more guard intervals. The guard interval can be located between the first symbol and the second symbol of the radio frame (such as after the last first symbol and before the first second symbol). If there are multiple guard intervals, one of the guard intervals can also be located after the last symbol of the radio frame.

[0219] For example, taking the first symbol as G symbol and the second symbol as T symbol as an example. Assuming that a wireless frame includes 13 symbols, the wireless frame can have 14 frame structures, and the ratio of G symbol and / or T symbol in each frame structure is different. Specifically, the configuration of G symbol and T symbol in the wireless frame is shown in Table 11 as follows.

[0220] Table 11

[0221] When a wireless frame includes 12 symbols, the wireless frame can have 13 frame structures, wherein the frame structure (or symbol configuration) with frame structure index of 0 to 10 is the same as the frame structure (or symbol configuration) with frame structure index of 0 to 10 in the aforementioned Table 6, the symbol configuration with frame structure index of 11 is all G symbols, and the symbol configuration with frame structure index of 12 is all T symbols. Similarly, when a wireless frame includes 11 symbols, the wireless frame can have 12 frame structures, wherein the frame structure (or symbol configuration) with frame structure index of 0 to 9 is the same as the frame structure (or symbol configuration) with frame structure index of 0 to 9 in the aforementioned Table 7, the symbol configuration with frame structure index of 10 is all G symbols, and the symbol configuration with frame structure index of 11 is all T symbols. When a wireless frame includes 10 symbols, the wireless frame can have 11 frame structures, wherein the frame structure (or symbol configuration) with frame structure index of 0 to 8 is the same as the frame structure (or symbol configuration) with frame structure index of 0 to 8 in the aforementioned Table 8, the symbol configuration with frame structure index of 9 is all G symbols, and the symbol configuration with frame structure index of 10 is all T symbols. Similarly, when a wireless frame includes 9 symbols, the wireless frame can have 10 frame structures, wherein the frame structure (or symbol configuration) with frame structure index of 0 to 7 is the same as the frame structure (or symbol configuration) with frame structure index of 0 to 7 in the aforementioned Table 9, the symbol configuration with frame structure index of 8 is all G symbols, and the symbol configuration with frame structure index of 9 is all T symbols. When a wireless frame includes 8 symbols, the wireless frame can have 9 frame structures, wherein the frame structure (or symbol configuration) with frame structure index of 0 to 6 is the same as the frame structure (or symbol configuration) with frame structure index of 0 to 6 in the aforementioned Table 10, the symbol configuration with frame structure index of 7 is all G symbols, and the symbol configuration with frame structure index of 8 is all T symbols. Due to the limited space, the configuration of G symbol and / or T symbol in the wireless frame is not shown in the form of table.

[0222] Those skilled in the art can understand that when the frame structure adopted by a certain radio frame only includes the first symbol (such as G symbol), the radio frame can be equivalent to the second type of radio frame (GF) described above. When the frame structure adopted by a certain radio frame only includes the second symbol (such as T symbol), the radio frame can be equivalent to the third type of radio frame (TF) described above. When the frame structure adopted by a certain radio frame includes the first symbol and the second symbol and the guard interval, the radio frame can be equivalent to the first type of radio frame (SF) described above.

[0223] For example, assuming that the length of a TTI is 0.5 ms, the TTI includes 4 radio frames, and each radio frame (F) includes 13 symbols, the radio frame configuration in the TTI is shown in FIG. 12. FIG. 12 shows another schematic diagram of radio frame configuration when the length of a TTI is 0.5 ms. As shown in FIG. 12, when the length of a TTI is 0.5 ms, there are 4 radio frame configurations in the TTI, which are represented by indexes 0 to 3. Among them, the radio frame configuration "0" means that the frame structure of the first 3 radio frames can be the frame structure represented by the frame structure index 12 in the aforementioned table 11, and the frame structure of the 4th radio frame can be any one of the frame structures represented by the frame structure indexes 0 to 11 in the aforementioned table 11. The radio frame configuration "1" means that the frame structure of the first and second radio frames can be the frame structure represented by the frame structure index 12 in the aforementioned table 11, the frame structure of the third radio frame can be any one of the frame structures represented by the frame structure indexes 0 to 11 in the aforementioned table 11, and the frame structure of the fourth radio frame can be the frame structure represented by the frame structure index 13 in the aforementioned table 11. The radio frame configuration "2" means that the frame structure of the first radio frame can be the frame structure represented by the frame structure index 12 in the aforementioned table 11, the frame structure of the second radio frame can be any one of the frame structures represented by the frame structure indexes 0 to 11 in the aforementioned table 11, and the frame structure of the third and fourth radio frames can be the frame structure represented by the frame structure index 13 in the aforementioned table 11. The radio frame configuration "3" means that the frame structure of the four radio frames is the frame structure represented by the frame structure index 12 in the aforementioned table 11.

[0224] It can be understood that the radio frame configuration in a TTI of other length is similar to the radio frame configuration in a TTI of 0.5 ms, which is not listed here.

[0225] It can be understood that, in one TTI, generally a plurality of radio frames are included. In the prior art, the configuration of G symbols and T symbols in each radio frame is the same as indicated by the broadcast information shown in Table 1, which causes the G symbols and the T symbols to be relatively scattered, so that the G link data or the T link data cannot be transmitted in a centralized manner, and the transmission delay is increased. The radio frames in the TTI designed in the embodiments of the present application (except for the case that all the G symbols in one TTI) can simultaneously support the G link and the T link transmission, can quickly perform data transmission and ACK (acknowledgment) / NACK (Non-acknowledgment) feedback, and reduce the delay; and the occupation ratio of the G link resource and the T link resource in one TTI can be dynamically adjusted, so as to flexibly adapt to diversified services with different delay and reliability requirements.

[0226] Based on the possible radio frame configurations in different TTIs provided in the foregoing embodiments of the present application, the following introduces several possible indication manners of the radio frame configuration in one TTI.

[0227] In one possible implementation manner, the broadcast message can further include fourth indication information, which can be used to indicate the radio frame configuration in one TTI, and / or the configuration of the first symbol and the second symbol in the first type of radio frame. For example, the fourth indication information can be implemented by using the reserved bit in Table 4.

[0228] In another possible implementation manner, the communication method shown in Fig. 2 further includes that the first device (such as a G node) transmits identification information. Correspondingly, the second device (such as a T node) receives the identification information. The identification information can include the identification of the first device, and is used to identify the first device. The identification information further includes fourth indication information. The fourth indication information can be used to indicate the radio frame configuration in one TTI, and / or the configuration of the first symbol and the second symbol in the first type of radio frame.

[0229] In another possible implementation manner, the communication method shown in Fig. 2 further includes that the first device (such as a G node) can transmit common control information in a control information common search space, and correspondingly, the second device (such as a T node) can blindly detect the common control information in the control information common search space. The common control information includes fourth indication information, which can be used to indicate the radio frame configuration in one TTI, and / or the configuration of the first symbol and the second symbol in the first type of radio frame. It can be understood that, transmitting the common control information in the control information common search space means transmitting the common control information in all or part of the symbols occupied by the control information common search space. For example, assuming that the control information common search space occupies 8 (namely, N is equal to 8) symbols, and the common control information is transmitted by using only 2 symbols of the 8 symbols.

[0230] For example, when the length of the TTI is 0.125 ms, the TTI can contain one radio frame configuration (i.e., all first type radio frames), in which case the default radio frame configuration can be used without additional indication overhead. The fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the configuration of the first symbol and the second symbol in the first type radio frame, such as the frame structure index in the aforementioned Tables 5 to 11. The specific frame structure index to be indicated can be determined based on the length of the cyclic prefix. It can be appreciated that 4 bits can indicate 16 frame structure indexes, and 3 bits can only indicate 8 frame structure indexes. If the fourth indication information is 3 bits, it can indicate part of the frame structure indexes (8 frame structure indexes) in the aforementioned Tables 5 to 11. Details are not described herein. The embodiments of the present disclosure do not limit which 8 frame structure indexes are indicated.

[0231] When the length of the TTI is 0.125 ms, the TTI can also contain two radio frame configurations. The first radio frame configuration can be: all first type radio frames, and the second radio frame configuration can be: all second type radio frames. The fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the radio frame configuration in a TTI, and when the radio frame configuration includes the first type radio frame, it can also indicate the configuration of the first symbol and the second symbol in the first type radio frame. For example, the most significant bit (MSB) of 4 bits or 3 bits can be used to indicate whether the radio frame configuration in a TTI is the first radio frame configuration or the second radio frame configuration. If the radio frame configuration indicated by the MSB includes the first type radio frame, the remaining 3 bits or 2 bits can be used to indicate the configuration of the first symbol and the second symbol in the first type radio frame, such as the frame structure index in the aforementioned Tables 5 to 11. The specific frame structure index to be indicated can be determined based on the length of the cyclic prefix. It can be appreciated that if 3 bits are used, 8 configurations of the first symbol and the second symbol in the first type radio frame can be indicated; if 2 bits are used, 4 configurations of the first symbol and the second symbol in the first type radio frame can be indicated; details are not described herein. The embodiments of the present disclosure do not limit which 8 configurations or which 4 configurations are indicated.

[0232] When the length of the TTI is 0.25 ms, the TTI can contain one radio frame configuration, as shown in the aforementioned FIG. 5a, the first radio frame is the second type radio frame, and the second radio frame is the first type radio frame. In this case, the default radio frame configuration can be used without additional indication overhead. The fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the configuration of the first symbol and the second symbol in the first type radio frame, such as the frame structure index in the aforementioned Tables 5 to 11. The specific frame structure index to be indicated can be determined based on the length of the cyclic prefix.

[0233] When the length of a TTI is 0.25 ms, there can also be two radio frame configurations in the TTI. In a first radio frame configuration, the first radio frame is a second type of radio frame, and the second radio frame is a first type of radio frame, as shown in FIG. 5a. In a second radio frame configuration, each radio frame is a second type of radio frame, as shown in FIG. 5b. The fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the radio frame configuration in a TTI, and when the radio frame configuration includes a first type of radio frame, the fourth indication information can also be used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame. For example, the most significant bits (MSBs) of the 4 bits or 3 bits can be used to indicate whether the radio frame configuration in a TTI is the first radio frame configuration or the second radio frame configuration. If the MSBs indicate that the radio frame configuration includes a first type of radio frame, the remaining 3 bits or 2 bits can be used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame, such as the frame structure index in the preceding Tables 5 to 11. The frame structure index of which table is indicated can be determined based on the length of the cyclic prefix.

[0234] When the length of a TTI is 0.5 ms, there can be four radio frame configurations in the TTI, as shown in FIG. 7. The fourth indication information (e.g., 4 bits or 3 bits) can be used to indicate the radio frame configuration in a TTI, and when the radio frame configuration includes a first type of radio frame, the fourth indication information can also be used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame. For example, the 2 MSBs of the 4 bits or 3 bits can be used to indicate the radio frame configuration in a TTI. If the 2 MSBs indicate that the radio frame configuration includes a first type of radio frame, the remaining 2 bits or 1 bit can be used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame. It can be understood that because the remaining 2 bits can only indicate 4 symbol configurations in a first type of radio frame, 4 symbol configurations can be selected from the preceding Tables 5 to 11 for different cyclic prefixes. Similarly, if the remaining 1 bit can only indicate 2 symbol configurations in a first type of radio frame, 2 symbol configurations can be selected from the preceding Tables 5 to 11 for different cyclic prefixes. Taking the preceding Table 6 as an example, 4 symbol configurations are selected from 11 symbol configurations, and the 4 symbol configurations are shown in Table 12. One possible implementation of the 4 symbol configurations is that the 4 symbol configurations are system default configurations, such as 4 symbol configurations predefined by a standard. Another possible implementation of the 4 symbol configurations is that a set (including the 4 symbol configurations) is configured by using system information block 0 (SIB0) signaling or high-layer signaling, and the remaining 2 bits are used to indicate each element in the set. Embodiments of the present application do not limit this.

[0235] Table 12

[0236] When the length of a TTI is 1ms, there can be 8 radio frame configurations in the TTI, as shown in the aforementioned FIG. 8. The fourth indication information (e.g. 4 bits or 3 bits) can be used to indicate the radio frame configuration in a TTI, and when the radio frame configuration includes the first type of radio frame, the fourth indication information can also indicate the configuration of the first symbol and the second symbol in the first type of radio frame. For example, taking 4 bits as an example, 3 MSB bits in the 4 bits can be used to indicate the radio frame configuration in a TTI. If the radio frame configuration indicated by the 3 MSB bits includes the first type of radio frame, the remaining 1 bit can be used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame. It can be understood that the remaining 1 bit can only indicate 2 symbol configurations in the first type of radio frame, and for different cyclic prefixes, 2 symbol configurations can be selected from the aforementioned Table 5 to Table 11. One possible implementation of the selected 2 symbol configurations is that the system uses a default configuration, e.g. a standard pre-defined 2 symbol configurations. Another possible implementation is that a set (including 2 symbol configurations) is configured by SIB0 signaling or high layer signaling, and then the remaining 1 bit is used to indicate each element in the set. Embodiments of the present application do not limit this.

[0237] If the fourth indication information is 3 bits, 8 radio frame configurations in a TTI can be indicated. The configuration of the first symbol and the second symbol in the first type of radio frame (if exists) in the 8 radio frame configurations can use a default configuration, e.g. a standard pre-defined symbol configuration. Alternatively, the position of the guard interval can be configured by SIB signaling or high layer signaling to indirectly indicate the configuration of the first symbol and the second symbol in the first type of radio frame (if exists). For example, the SIB signaling or high layer signaling can indicate that there is a guard interval after the Gth symbol.

[0238] When the length of the TTI is 2ms or 4ms or 8ms, the TTI can contain 16 radio frame configurations, as shown in the aforementioned FIG. 9, or FIG. 10a, or FIG. 10b, or FIG. 11a, or FIG. 11b. The fourth indication information (such as 4 bits or 3 bits) can be used to indicate the radio frame configuration in a TTI. It can be understood that if the fourth indication information is 3 bits, 8 radio frame configurations can be selected from the 16 radio frame configurations, and then the 3 bits are used to indicate respectively. The specific selection of the 8 radio frame configurations is not limited by the embodiments of the present application. Similarly, when the fourth indication information is 3 bits and the length of the TTI is 1ms, the configuration of the first symbol and the second symbol in the first type of radio frame (if any) can adopt the system default configuration, such as a certain symbol configuration predefined by the standard. Alternatively, the position of the guard interval can be configured in the SIB signaling or the high-layer signaling to indirectly indicate the configuration of the first symbol and the second symbol in the first type of radio frame (if any). For example, the SIB signaling or the high-layer signaling can indicate that there is a guard interval after the G symbol.

[0239] The embodiments of the present application jointly indicate the radio frame configuration in a TTI and the configuration of the first symbol and the second symbol in the first type of radio frame, which has less overhead.

[0240] In a possible implementation, after the first device (such as a G node) sends the aforementioned broadcast message, such as after step S103, the first device (such as a G node) can send common control information on all or part of the symbols occupied by the control information common search space. Correspondingly, the second device can blindly detect the common control information on the N symbols occupied by the control information common search space. The common control information can include third indication information, which can be used to indicate the time domain resource allocated to the second device (such as a T node) in a TTI, which can be used by the second device to send and / or receive data. For details, refer to the description of the embodiment shown in FIG. 13 below, which is not described here. In this implementation, the radio frame configuration in a TTI and the configuration of the first symbol and the second symbol in the radio frame do not need to be explicitly indicated, the transmission of the G link and the T link is realized by allocating time domain resources to the second device, and the occupancy ratio of the G link resource and the T link resource in a TTI can be dynamically adjusted.

[0241] Referring to FIG. 13, FIG. 13 is another flowchart of a communication method according to an embodiment of the present application. In a possible implementation, the embodiments of the present application can be implemented in combination with the embodiment shown in FIG. 2, or can be implemented alone, and the present application does not make any limitation. When the embodiments of the present application are implemented in combination with the embodiment shown in FIG. 2, the embodiments of the present application can be implemented after the embodiment shown in FIG. 2 (specifically, after step S103), and for details, refer to the description of the embodiments below.

[0242] As shown in FIG. 13, the communication method includes but is not limited to the following steps:

[0243] In S201, a first device (e.g., a G node) generates common control information.

[0244] In S202, the first device (e.g., the G node) sends the common control information, which includes third indication information indicating time domain resources allocated to a second device (e.g., a T node) within a TTI for the second device to send and / or receive data.

[0245] Correspondingly, the second device (e.g., the T node) receives the common control information.

[0246] In S203, the second device (e.g., the T node) processes the common control information.

[0247] In one possible implementation, the first device (e.g., the G node) generates the common control information and sends the common control information on all or part of symbols occupied by a control information common search space. The second device can blindly detect the common control information on N symbols occupied by the control information common search space. The common control information can include the third indication information, which can indicate time domain resources allocated to one or more second devices (e.g., T nodes) within a TTI. Alternatively, the third indication information can 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 can include a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information can include a starting symbol index of the time domain resources and a number of symbols of the time domain resources. Alternatively, the third indication information can include an ending symbol index of the time domain resources and a number of symbols of the time domain resources. The embodiments of the present application do not limit the specific content of the third indication information.

[0248] In the embodiments of the present application, the second device (e.g., the T node) does not need to know the configuration of a radio frame within a TTI, nor the configuration of a first symbol (e.g., a G symbol) and a second symbol (e.g., a T symbol) in the radio frame, but only needs to perform data sending and / or receiving according to the time domain resources indicated by the first device (e.g., the G node).

[0249] For example, K bits in the common control information can be used to indicate a starting symbol index of the time domain resources, and P bits in the common control information can be used to indicate an ending symbol index of the time domain resources. The values of K and P can be the same or different, and K and P are both positive integers. When K and P are both equal to 10 bits, 1024 (2 10A TTI of different length (including 8ms, 4ms, 2ms, 1ms, 0.5ms, 0.25ms, 0.125ms) can be covered. The first symbol in the TTI is indexed as 0, and the last symbol in the TTI is indexed as L (L is a positive integer), i.e. the symbol index in the TTI is: 0, 1, 2, …, L; when L is less than 1024, then 10 bits can indicate each symbol from 0 to L. For example, the starting symbol index is L1, and the ending symbol index is L2 (L2 is greater than or equal to L1), then the continuous symbols from L1 to L2 (including the symbols with index L1 and L2) are all allocated to the second device (such as a T node) for use (such as data transmission and reception).

[0250] It can be understood that the embodiments of the present application only describe the time domain resources allocated by the first device to the second device, and in actual application, the common control information will also indicate the frequency domain resources, and the embodiments of the present application do not limit the indication of the frequency domain resources in the common control information. The second device (such as a T node) can determine the time-frequency resources on which data transmission and reception are finally performed according to the indication of the time-frequency resources (including time domain resources and frequency domain resources) in the common control information.

[0251] In one possible implementation, the time domain resources allocated by the first device to the one or more second devices within a TTI can be used by the one or more second devices to transmit and / or receive data. Whether the time domain resources are used by the second device to transmit data, to receive data, or to both transmit and receive data, can be determined by the link type indication in the third indication information. In other words, the third indication information can further include a link type indication, which can be used to indicate whether the time domain resources are used by the second device (e.g., a T-node) to transmit or receive data. For example, the link type indication can be one bit. When the link type indication is “0”, it indicates G-link transmission, i.e., the time domain resources are used by the second device to receive data. When the link type indication is “1”, it indicates T-link transmission, i.e., the time domain resources are used by the second device to transmit data. In some scenarios, the third indication information can include two link type indications (or two bits). One link type indication (or one bit) can be used to indicate whether the first time domain resources are used by the second device (e.g., a T-node) to transmit or receive data. Another link type indication (or one bit) can be used to indicate whether the second time domain resources are used by the second device (e.g., a T-node) to transmit or receive data. The first time domain resources and the second time domain resources can be two parts of the time domain resources allocated by the first device to the second device within a TTI. In other words, the third indication information can be used to indicate the first time domain resources and the second time domain resources allocated by the first device to the second device (e.g., a T-node) within a TTI. It can be understood that when one link type indication (or one bit) indicates that the first time domain resources are used by the second device to transmit data, and another link type indication (or another bit) indicates that the second time domain resources are used by the second device to receive data, the time domain resources allocated by the first device to the second device within a TTI are used by the second device to transmit and receive data.

[0252] For example, assume that a time domain resource needs (K+P) bits to be indicated, such as K bits in the common control information to indicate a starting symbol index of a time domain resource, and P bits in the common control information to indicate an ending symbol index of the time domain resource. The third indication information can include 2×(K+P+1) bits, where (K+P+1) bits can be used to indicate a first time domain resource allocated for the second device (e.g., T node) in a TTI, and the first time domain resource is used for the second device to transmit or receive data. In addition, (K+P+1) bits can be used to indicate a second time domain resource allocated for the second device (e.g., T node) in a TTI, and the second time domain resource is used for the second device to transmit or receive data. Referring to FIG. 14, which is a schematic diagram of a frame structure of the third indication information according to an embodiment of the present application. As shown in FIG. 14, the length of the third indication information can be 2×(K+P+1) bits. Of the first (K+P+1) bits, (K+P) bits indicate a first time domain resource allocated for the second device (e.g., T node) in a TTI, and when the first bit of 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 the first bit of 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. Of the last (K+P+1) bits, (K+P) bits indicate a second time domain resource allocated for the second device (e.g., T node) in a TTI, and when the first bit of 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 the first bit of 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.

[0253] It can be understood that the bit order shown in FIG. 14 is only an example, and embodiments of the present application are not limited thereto. For example, the first bit of the first (K+P+1) bits or the last (K+P+1) bits can also be located before the (K+P) bits, or the first bit of the first (K+P+1) bits and the first bit of the last (K+P+1) bits can also be located at the very beginning of the third indication information, and so on.

[0254] In a possible implementation, the first device (e.g., G node) can respectively send the common control information to each second device (e.g., T node) for different second devices (e.g., T node). Different second devices (e.g., T node) can transmit and / or receive data on different time domain resources. Of course, the first device (e.g., G node) can also send (e.g., multicast or broadcast) the common control information to multiple second devices (e.g., T node) served by the first device. The multiple second devices (e.g., T node) can receive data on a given time domain resource.

[0255] It can be understood that the embodiments of the present application do not need to explicitly indicate the configuration of the radio frame within one TTI and the configuration of the first symbol and the second symbol in the radio frame, and the time domain resources are all allocated by the first device (such as a G node), and the second device (such as a T node) transmits and / or receives data on the given time domain resources according to the indication of the first device (such as a G node), so that the occupation ratio of the G link resources and the T link resources within each TTI can be dynamically adjusted, the dynamic change of the service can be matched, and the delay can be reduced.

[0256] In a possible implementation, before the first device (such as a G node) sends the above-mentioned common control information, the communication method shown in FIG. 13 further includes that the first device (such as a G node) sends (for example, broadcasts) a broadcast message, and the broadcast message can include first indication information, and the first indication information can be used to indicate the length of the TTI. For example, the broadcast message further includes 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 of the broadcast message is located. For example, the specific description about the broadcast message, the first indication information, the cyclic prefix indication information, the radio frame number indication information and the like can be referred to the description of the foregoing embodiment shown in FIG. 2, and details are not described herein.

[0257] In a possible implementation, the broadcast message can further include second indication information, and the second indication information can be used to indicate the number N of symbols occupied by the common control information search space. For example, the specific description about the second indication information, the position of the symbol occupied by the common control information search space and the like can be referred to the description of the foregoing embodiment shown in FIG. 2, and details are not described herein.

[0258] It can be understood that, since the embodiments of the present application do not need to indicate the configuration of the radio frame within one TTI and the configuration of the first symbol and the second symbol in the radio frame, the fourth indication information in the embodiment shown in FIG. 2 can not be included in the broadcast message of the embodiments of the present application.

[0259] The embodiments of the present application introduce the third indication information in the common 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), and the second device (such as a T node) can transmit and / or receive data on the time domain resources, so that not only the TTI with variable length can be supported to adapt to devices with different capabilities, but also the occupation ratio of the G link resources and the T link resources within one TTI can be dynamically adjusted to flexibly adapt to diversified services with different delay and reliability requirements.

[0260] The above describes the method provided by the present application in detail, and in order to facilitate the implementation of the above-mentioned scheme of the embodiments of the present application, the embodiments of the present application further provide a corresponding device or equipment.

[0261] The first device and the second device are divided into function modules according to the method embodiments, for example, each function module can be divided according to each function, or two or more functions can be integrated into one processing module. The integrated module can be realized in the form of hardware or in the form of a software function module. It should be noted that the division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division manner. The device of the embodiments of the present application will be described in detail below with reference to FIG. 15 to FIG. 17.

[0262] Referring to FIG. 15, FIG. 15 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 15, the communication apparatus includes a processing module 801 and a transceiver module 802. The transceiver module 802 can realize corresponding communication functions, and the processing module 801 is configured to realize corresponding processing functions. The transceiver module 802 can also be referred to as an interface, a communication interface, or a communication module, etc.

[0263] In some embodiments of the present application, the communication apparatus can be configured to perform the actions performed by the first device in the above method embodiments. At this time, the communication apparatus can be the first device itself or a chip or a function module configured in the first device, etc. The transceiver module 802 is configured to perform the transceiving related operations of the first device in the above method embodiments, and the processing module 801 is configured to perform the processing related operations of the first device in the above method embodiments.

[0264] In one design, the processing module 801 can be configured to generate a broadcast message, and the transceiver module 802 can be configured to transmit the broadcast message. The broadcast message can include first indication information, which is configured to indicate a length of a TTI.

[0265] It can be understood that the transceiver module 802 can transmit the broadcast message to other communication apparatuses, or the transceiver module 802 outputs the broadcast message from the processing module 801 to other components or other function modules in the communication apparatus, etc. The related description of the transceiver module outputting other information is similar, and will not be described in detail hereinafter.

[0266] 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.

[0267] For example, the broadcast message further includes one or more of cyclic prefix indication information and radio frame number indication information. The cyclic prefix indication information can be configured to indicate a length of a cyclic prefix, and the radio frame number indication information can be configured to indicate a frame number of a frame in which a first symbol of the broadcast message is located.

[0268] Exemplarily, the broadcast message further comprises second indication information, the second indication information being used to indicate a number N of symbols occupied by the control information common search space, N being a positive integer.

[0269] Exemplarily, the control information common search space occupies N consecutive symbols.

[0270] Exemplarily, the control information common search space occupies N consecutive symbols immediately after the synchronization signal. Alternatively, the control information common search space occupies N consecutive symbols immediately after the identification information, the identification information being used to identify the first device. Alternatively, the control information common search space occupies N consecutive symbols immediately after the broadcast message. Alternatively, the control information common search space occupies N consecutive symbols immediately after the reference signal.

[0271] Exemplarily, the transceiver 802 is further configured to transmit common control information on all or part of the symbols occupied by the control information common search space, the common control information comprising third indication information, the third indication information being used to indicate time domain resources allocated to the second device within a TTI, the time domain resources being used for the second device to transmit and / or receive data.

[0272] Exemplarily, the third indication information comprises a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information comprises a starting symbol index of the time domain resources and a number of symbols of the time domain resources.

[0273] Exemplarily, the third indication information further comprises a link type indication, the link type indication being used to indicate that the time domain resources are used for the second device to transmit or receive data.

[0274] Exemplarily, the TTI comprises a first type of radio frame. The first type of radio frame comprises a first symbol, a second symbol and at least one guard interval, the first symbol being a symbol for the first device to transmit to the second device, and the second symbol being a symbol for the second device to transmit to the first device.

[0275] Exemplarily, the TTI comprises a second type of radio frame. The second type of radio frame comprises only the first symbol, the first symbol being a symbol for the first device to transmit to the second device.

[0276] Exemplarily, the TTI comprises the first type of radio frame and the second type of radio frame. The first type of radio frame comprises a first symbol, a second symbol and at least one guard interval, the second type of radio frame comprises only the first symbol, the first symbol being a symbol for the first device to transmit to the second device, and the second symbol being a symbol for the second device to transmit to the first device.

[0277] Exemplarily, the 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 includes only the first symbol, and the third type of radio frame includes 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.

[0278] Exemplarily, when the last radio frame in the TTI is the first type of radio frame, the last radio frame includes two guard intervals, one of which is located between the first symbol and the second symbol of the last radio frame, and the other of which is located after the last symbol. Alternatively, the first type of radio frame is not the last radio frame included in the TTI, and the first type of radio frame includes one guard interval located between the first symbol and the second symbol of the first type of radio frame.

[0279] Exemplarily, the first radio frame in the TTI is the second type of radio frame.

[0280] Exemplarily, when the last radio frame in the TTI is the third type of radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0281] Exemplarily, the transceiver 802 is further configured to send identification information, the identification information being used to identify the first device, and the identification information further including fourth indication information, the fourth indication information being used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame.

[0282] Exemplarily, the transceiver 802 is further configured to send identification information, the identification information being used to identify the first device, and the identification information further including fourth indication information, the fourth indication information being used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame.

[0283] Exemplarily, the transceiver 802 is further configured to send identification information, the identification information being used to identify the first device, and the identification information further including fourth indication information, the fourth indication information being used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame.

[0284] In the embodiments of the present application, the specific description of the terms or nouns or steps such as broadcast message, first indication information, second indication information, control information common search space, common control information, third indication information, identification information, fourth indication information, first device, second device, etc. can also refer to the introduction in the method embodiments above, and will not be described one by one here.

[0285] It is to be understood that the specific description of the transceiver module and the processing module shown in the embodiments of the present application is only an example. For the specific functions or executed steps of the transceiver module and the processing module, reference can be made to the above method embodiments (such as FIG. 2), and here will not be described in detail. In addition, the technical effects of the embodiments of the present application are described above in the method embodiments, and for brevity, will not be described here.

[0286] In another design, the processing module 801 can be configured to generate common control information, and the transceiver module 802 can be configured to transmit the common control information, the common control information including third indication information, the third indication information being used to indicate time domain resources allocated to the second device within a TTI, the time domain resources being used by the second device to transmit and / or receive data.

[0287] For example, the third indication information includes a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information includes a starting symbol index of the time domain resources and a number of symbols of the time domain resources.

[0288] For example, the third indication information further includes a link type indication, the link type indication being used to indicate that the time domain resources are used by the second device to transmit or receive data.

[0289] For example, the transceiver module 802 can be further configured to transmit a broadcast message, the broadcast message including first indication information, the first indication information being used to indicate a length of the TTI. The broadcast message further includes one or more of cyclic prefix indication information and radio frame number indication information, the cyclic prefix indication information being used to indicate a length of a cyclic prefix, and the radio frame number indication information being used to indicate a frame number of a frame in which a first symbol of the broadcast message is located.

[0290] For example, the length of the TTI includes one or more of 0.125 ms, 0.25 ms, 0.5 ms, 1 ms, 2 ms, 4 ms, or 8 ms.

[0291] For example, the broadcast message further includes second indication information, the second indication information being used to indicate a number of symbols N occupied by a control information common search space, N being a positive integer.

[0292] For example, the control information common search space occupies N consecutive symbols.

[0293] For example, the control information common search space occupies the N continuous symbols immediately after the synchronization signal. Alternatively, the control information common search space occupies the N continuous symbols immediately after the identification information, which is used to identify the first device. Alternatively, the control information common search space occupies the N continuous symbols immediately after the broadcast message. Alternatively, the control information common search space occupies the N continuous symbols immediately after the reference signal.

[0294] In the embodiments of the present application, the specific description of the terms or nouns or steps such as the public control information, the third indication information, the broadcast message, the first indication information, the second indication information, the first device, and the second device can also refer to the introduction in the method embodiments, which will not be described one by one here.

[0295] It can be understood that the specific description of the transceiver module and the processing module shown in the embodiments of the present application is only an example. For the specific functions or executed steps of the transceiver module and the processing module, reference can be made to the method embodiments (such as FIG. 13), which will not be described here. In addition, the technical effects of the embodiments of the present application are described in the foregoing method embodiments, and for the sake of brevity, will not be described here.

[0296] In another embodiment of the present application, the communication device can be used to perform the actions performed by the second device in the method embodiments. At this time, the communication device can be the second device itself or a chip or functional module configured in the second device. The transceiver module 802 is used to perform the transceiver-related operations of the second device in the method embodiments, and the processing module 801 is used to perform the processing-related operations of the second device in the method embodiments.

[0297] In one design, the transceiver module 802 can be used to receive the broadcast message, and the processing module 801 can be used to process the broadcast message. The broadcast message includes the first indication information, which is used to indicate the length of the TTI.

[0298] It can be understood that the transceiver module 802 can receive the broadcast message from other communication devices, or the transceiver module 802 inputs the broadcast message from other components or other functional modules in the communication device. The related description of the transceiver module inputting other information is similar, which will not be described here.

[0299] For example, the broadcast message further includes one or more of the cyclic prefix indication information and the radio frame number indication information. The cyclic prefix indication information is used to indicate the length of the cyclic prefix, and the radio frame number indication information is used to indicate the frame number of the frame in which the first symbol of the broadcast message is located.

[0300] Exemplarily, the length of the TTI comprises one or more of the following: 0.125 ms, 0.25 ms, 0.5 ms, 1 ms, 2 ms, 4 ms, or 8 ms.

[0301] Exemplarily, the broadcast message further comprises second indication information, the second indication information being used to indicate a number N of symbols occupied by the control information common search space, N being a positive integer.

[0302] Exemplarily, the control information common search space occupies the N consecutive symbols.

[0303] Exemplarily, the control information common search space occupies the N consecutive symbols immediately after the synchronization signal. Alternatively, the control information common search space occupies the N consecutive symbols immediately after the identification information, the identification information being used to identify the first device. Alternatively, the control information common search space occupies the N consecutive symbols immediately after the broadcast message. Alternatively, the control information common search space occupies the N consecutive symbols immediately after the reference signal.

[0304] Exemplarily, the transceiver module 802 is further configured to receive common control information on the symbols occupied by the control information common search space, the common control information comprising third indication information, the third indication information being used to indicate time domain resources allocated to the second device within a TTI, the time domain resources being used by the second device to transmit and / or receive data.

[0305] Exemplarily, the third indication information comprises a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information comprises a starting symbol index of the time domain resources and a number of symbols of the time domain resources.

[0306] Exemplarily, the third indication information further comprises a link type indication, the link type indication being used to indicate whether the time domain resources are used by the second device to transmit data or to receive data.

[0307] Exemplarily, the TTI comprises a first type of radio frame. The first type of radio frame comprises a first symbol, a second symbol and at least one guard interval, the first symbol being a symbol in which the first device transmits to the second device, and the second symbol being a symbol in which the second device transmits to the first device.

[0308] Exemplarily, the TTI comprises a second type of radio frame. The second type of radio frame comprises only the first symbol, the first symbol being a symbol in which the first device transmits to the second device.

[0309] In an 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 includes only first symbols. The first symbol is a symbol transmitted by the first device to the second device, and the second symbol is a symbol transmitted by the second device to the first device.

[0310] In an 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 includes only first symbols. The third type of radio frame includes only second symbols. The first symbol is a symbol transmitted by the first device to the second device, and the second symbol is a symbol transmitted by the second device to the first device.

[0311] In an example, when the last radio frame in the TTI is the first type of radio frame, the last radio frame includes two guard intervals. One of the guard intervals is between the first symbol and the second symbol of the last radio frame, and the other guard interval is after the last symbol. Alternatively, the first type of radio frame is not the last radio frame in the TTI, and the first type of radio frame includes one guard interval between the first symbol and the second symbol of the first type of radio frame.

[0312] In an example, the first radio frame in the TTI is the second type of radio frame.

[0313] In an example, when the last radio frame in the TTI is the third type of radio frame, there is a guard interval after the last second symbol of the last radio frame.

[0314] In an example, the transceiver 802 can further receive identification information identifying the first device, the identification information including fourth indication information indicating configurations of the first symbol and the second symbol in the first type of radio frame.

[0315] In an example, the transceiver 802 can further receive identification information identifying the first device, the identification information including fourth indication information indicating configurations of radio frames in a TTI.

[0316] In an example, the transceiver 802 can further receive identification information identifying the first device, the identification information including fourth indication information indicating configurations of radio frames in a TTI and configurations of the first symbol and the second symbol in the first type of radio frame.

[0317] In the embodiments of the present application, the specific description of the terms or names or steps such as broadcast message, first indication information, second indication information, control information common search space, common control information, third indication information, identity information, fourth indication information, first device, second device, etc. can also refer to the introduction in the method embodiments above, which will not be described in detail here.

[0318] It can be understood that the specific description of the transceiver module and the processing module shown in the embodiments of the present application is only an example. For the specific functions or executed steps of the transceiver module and the processing module, reference can be made to the above method embodiments (such as FIG. 2), which will not be described in detail here. In addition, the technical effects of the embodiments of the present application are described above, and for the sake of brevity, they will not be described here.

[0319] In another design, the transceiver module 802 can be configured to receive common control information, and the processing module 801 can be configured to process the common control information. The common control information includes third indication information, and the third indication information is used to indicate time domain resources allocated for the second device in a TTI, and the time domain resources are used for the second device to send and / or receive data.

[0320] For example, the third indication information includes a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information includes a starting symbol index of the time domain resources and a symbol number of the time domain resources.

[0321] For example, the third indication information further includes a link type indication, and the link type indication is used to indicate that the time domain resources are used for the second device to send or receive data.

[0322] For example, the transceiver module 802 can also be configured to receive a broadcast message, and the broadcast message includes first indication information, and the first indication information is used to indicate the length of the TTI. The broadcast message further includes one or more of the following: 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, and the radio frame number indication information is used to indicate the frame number of the frame in which the first symbol of the broadcast message is located.

[0323] For example, the length of the TTI includes one or more of the following: 0.125 milliseconds, 0.25 milliseconds, 0.5 milliseconds, 1 milliseconds, 2 milliseconds, 4 milliseconds, or 8 milliseconds.

[0324] For example, the broadcast message further includes second indication information, and the second indication information is used to indicate the symbol number N occupied by the control information common search space, and N is a positive integer.

[0325] For example, the control information common search space occupies N consecutive symbols.

[0326] For example, the control information common search space occupies the N continuous symbols immediately after the synchronization signal. Alternatively, the control information common search space occupies the N continuous symbols immediately after the identification information used for identifying the first device. Alternatively, the control information common search space occupies the N continuous symbols immediately after the broadcast message. Alternatively, the control information common search space occupies the N continuous symbols immediately after the reference signal.

[0327] In the embodiments of the present application, the specific description of the terms or nouns or steps such as the public control information, the third indication information, the broadcast message, the first indication information, the second indication information, the first device, the second device, etc. can also refer to the introduction in the method embodiments above, which will not be described one by one in detail here.

[0328] It can be understood that the specific description of the transceiver module and the processing module shown in the embodiments of the present application is only an example. For the specific functions or executed steps of the transceiver module and the processing module, etc., reference can be made to the above method embodiments (such as FIG. 13), which will not be described in detail here. In addition, the technical effects of the embodiments of the present application are described in the foregoing method embodiments, and for the sake of brevity, will not be described here.

[0329] The first device and the second device of the embodiments of the present application are introduced above, and the possible product forms of the first device and the second device are introduced below. It should be understood that any form of product that has the functions of the first device and the second device described above in FIG. 15 falls within the protection scope of the embodiments of the present application. It should also be understood that the following introduction is only an example, and the product form of the first device and the second device of the embodiments of the present application is not limited to this.

[0330] In a possible implementation, in the communication apparatus shown in FIG. 15, 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 sending module and a receiving module, the sending module can be a transmitter, and the receiving module can be a receiver, and the sending module and the receiving module are integrated in one device, for example, a transceiver. In the embodiment of the application, the processor and the transceiver can be coupled, and the connection manner between the processor and the transceiver is not limited in the embodiment of the application. In the process of executing the above method, the process of sending information (for example, sending a broadcast message) in the above method can be the process of outputting the above information by the processor. When the above information is output, the processor outputs the above information to the transceiver, so that the transceiver transmits. After the above information is output by the processor, the above information can also need to be processed further, and then reaches the transceiver. Similarly, the process of receiving information (for example, receiving a broadcast message) in the above method can be the process of receiving input of the above information by the processor. When the processor receives the input information, the transceiver receives the above information and inputs it to the processor. Further, after the transceiver receives the above information, the above information can need to be processed further, and then input to the processor.

[0331] Referring to FIG. 16, FIG. 16 is another structural schematic diagram of the communication apparatus provided by the embodiment of the application. The communication apparatus can be the first device or the second device, or a chip therein. FIG. 16 only shows the main components of the communication apparatus. In addition to the processor 1001, the communication apparatus can further include a transceiver 1002 and a memory 1003, and an input and output apparatus (not shown in the figure).

[0332] The processor 1001 is mainly used for processing a communication protocol and communication data, and controlling the whole communication apparatus, executing a software program, and processing data of the software program. The memory 1003 is mainly used for storing the software program and the data. In a design, the transceiver 1002 can be referred to as a transceiving unit, a transceiver, or a transceiving circuit, etc., and is used for realizing a transceiving function. The transceiver 1002 can include a receiver and a transmitter. The receiver can be referred to as a receiver or a receiving circuit, etc., and is used for realizing a receiving function. The transmitter can be referred to as a transmitter or a sending circuit, etc., and is used for realizing a sending function. In another design, the transceiver 1002 can include a control circuit and an antenna. The control circuit is mainly used for conversion between a baseband signal and a radio frequency signal, and processing of the radio frequency signal. The antenna is mainly used for transceiving a radio frequency signal in the form of an electromagnetic wave. The input and output apparatus, for example, a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by a user and outputting data to the user.

[0333] When the communication apparatus is powered on, the processor 1001 can read a software program in the memory 1003, interpret and execute instructions of the software program, process data of the software program, control a medium access control (MAC) layer and a physical layer (PHY) to implement the method of the embodiments of the present application. When data needs to be sent wirelessly, the processor 1001 outputs a baseband signal to the radio frequency circuit after baseband processing of the data to be sent, and the radio frequency circuit converts the baseband signal into a radio frequency signal and sends the radio frequency signal in the form of an electromagnetic wave through an antenna. When data is sent to the communication apparatus, the radio frequency circuit receives a radio frequency signal through an antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 1001, and the processor 1001 converts the baseband signal into data and processes the data.

[0334] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor that performs baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication apparatus.

[0335] The processor 1001, the transceiver 1002, and the memory 1003 can be connected through a communication bus.

[0336] For example, when the communication apparatus is configured to perform the steps or methods or functions performed by the first device in the method embodiments shown in FIG. 2, the processor 1001 can be configured to perform step S101 in FIG. 2, and / or other processes described herein; the transceiver 1002 can be configured to perform step S102 in FIG. 2, and / or other processes described herein.

[0337] For example, when the communication apparatus is configured to perform the steps or methods or functions performed by the second device in the method embodiments shown in FIG. 2, the processor 1001 can be configured to receive a broadcast message, and / or other processes described herein; the transceiver 1002 can be configured to perform step S103 in FIG. 2, and / or other processes described herein.

[0338] For example, when the communication apparatus is configured to perform the steps or methods or functions performed by the first device in the method embodiments shown in FIG. 13, the processor 1001 can be configured to perform step S201 in FIG. 13, and / or other processes described herein; the transceiver 1002 can be configured to perform step S202 in FIG. 13, and / or other processes described herein.

[0339] For example, when the communication apparatus is configured to perform the steps or methods or functions performed by the second device in the method embodiment shown in FIG. 13, the processor 1001 can be configured to receive the common control information, and / or perform other processes of the techniques described herein; the transceiver 1002 can be configured to perform step S203 in FIG. 13, and / or other processes of the techniques described herein.

[0340] In any of the above designs, the processor 1001 can store instructions, which can be a computer program, running on the processor 1001, to cause the communication apparatus to perform the methods described in the above method embodiments. The computer program can be fixed in the processor 1001, in which case the processor 1001 can be implemented by hardware.

[0341] In an implementation, the communication apparatus can include circuitry, which can implement the functions of transmitting or receiving or communicating in the above method embodiments. The processor and the transceiver described in the present application can be implemented on an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFIC), a mixed-signal IC, an application specific integrated circuit (ASIC), a printed circuit board (PCB), an electronic device, etc. The processor and the transceiver can also be manufactured by various IC technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (NMOS), positive channel metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0342] It can be understood that the communication apparatus shown in the embodiments of the present application can also have more components than those shown in FIG. 16, which are not limited in the embodiments of the present application. The methods performed by the processor and the transceiver shown above are only examples, and the specific steps performed by the processor and the transceiver can be referred to the description of the above method embodiments. The optional part in FIG. 16 is shown by a dashed line.

[0343] In another possible implementation, in the communication apparatus shown in FIG. 15, the processing module 801 can be one or more logic circuits, and the transceiver module 802 can be an input / output interface, also referred to as a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver module 802 can also be a sending module and a receiving module, the sending module can be an output interface, and the receiving module can be an input interface, and the sending module and the receiving module are integrated into one module, for example, an input / output interface.

[0344] Referring to FIG. 17, FIG. 17 is another structural schematic diagram of the communication apparatus provided in the embodiments of the present application. As shown in FIG. 17, the communication apparatus shown in FIG. 17 includes a logic circuit 901 and an interface 902. That is, the processing module 801 can be implemented by the logic circuit 901, and the transceiver module 802 can be implemented by the interface 902. The logic circuit 901 can be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 902 can be a communication interface, an input / output interface, a pin, etc. For example, FIG. 17 is a diagram taking the communication apparatus as a chip, and the chip includes the logic circuit 901 and the interface 902.

[0345] In the embodiments of the present application, the logic circuit and the interface can also be coupled to each other. The specific connection manner of the logic circuit and the interface is not limited in the embodiments of the present application.

[0346] For example, when the communication apparatus is used to execute the method or the function or the step executed by the first device in the method embodiment shown in FIG. 2, the logic circuit 901 can be used to generate a broadcast message, and the broadcast message can include first indication information, the first indication information being used to indicate the length of a TTI; and the interface 902 can be used to output the broadcast message.

[0347] For example, when the communication apparatus is used to execute the method or the function or the step executed by the second device in the method embodiment shown in FIG. 2, the interface 902 can be used to input a broadcast message, and the broadcast message includes first indication information, the first indication information being used to indicate the length of a TTI; and the processing module 801 can be used to process the broadcast message.

[0348] In the embodiments of the present application, the specific description of the terms or the names or the steps such as the broadcast message and the first indication information can also refer to the introduction in the method embodiments (for example, FIG. 2), which will not be described in detail herein.

[0349] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the first device in the method embodiment shown in FIG. 13, the logic circuit 901 can be configured to generate the common control information; and the interface 902 can be configured to output the common control information, wherein the common control information comprises third indication information, and the third indication information is used to indicate time domain resources allocated for the second device in a TTI, and the time domain resources are used for the second device to transmit and / or receive data.

[0350] For example, when the communication apparatus is configured to perform the method or functions or steps performed by the second device in the method embodiment shown in FIG. 13, the interface 902 can be configured to input the common control information, wherein the common control information comprises third indication information, and the third indication information is used to indicate time domain resources allocated for the second device in a TTI, and the time domain resources are used for the second device to transmit and / or receive data; and the logic circuit 901 can be configured to process the common control information.

[0351] In the embodiments of the present application, the specific description of the terms or names or steps such as the common control information and the third indication information can also refer to the description in the method embodiments (such as FIG. 13), which will not be repeated here.

[0352] It can be understood that the communication apparatus shown in the embodiments of the present application can be in the form of hardware to implement the method provided by the embodiments of the present application, or in the form of software to implement the method provided by the embodiments of the present application, and the embodiments of the present application do not limit this.

[0353] For the specific implementation of the embodiment shown in FIG. 17, it can also refer to the above-mentioned various embodiments, which will not be described here.

[0354] In addition, the embodiments of the present application also provide a communication system, which comprises a first device and a second device, and the first device and the second device can be configured to perform the method in any of the above-mentioned embodiments.

[0355] The present application also provides a computer program for implementing the operations and / or processes performed by the first device in the method provided by the present application.

[0356] The present application also provides a computer program for implementing the operations and / or processes performed by the second device in the method provided by the present application.

[0357] The present application also provides a computer readable storage medium, which stores computer code, when the computer code is run on a computer, so that the computer executes the operations and / or processes performed by the first device in the method provided by the present application.

[0358] The application further provides a computer readable storage medium, wherein computer code is stored in the computer readable storage medium, and when the computer code is run on a computer, the computer code causes the computer to perform operations and / or processes performed by the second device in the method provided by the application.

[0359] The application further provides a computer program product, which comprises computer code or a computer program, and when the computer code or the computer program is run on a computer, operations and / or processes performed by the first device in the method provided by the application are performed.

[0360] The application further provides a computer program product, which comprises computer code or a computer program, and when the computer code or the computer program is run on a computer, operations and / or processes performed by the second device in the method provided by the application are performed.

[0361] In several embodiments provided by the application, it should be understood that the disclosed system, communication device and method can be implemented in other manners. For example, the embodiments of the communication device described above are merely schematic; for example, the division of the modules is only a logical function division; there can be another division manner in actual implementation; for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between the modules can be indirect coupling or communication connection through some interface, communication device or module, and can also be electrically, mechanically or in other forms of connection.

[0362] The modules illustrated as separated components can or can not be physically separated, and the components illustrated as modules can or can not be physical modules, i.e., can be located in one place, or can be distributed on a plurality of network modules. Part or all of the modules can be selected according to actual needs to achieve the technical effects of the scheme provided by the embodiments of the application.

[0363] In addition, each functional module in each embodiment of the application can be integrated into one processing module, or each module can exist physically independently, or two or more modules can be integrated into one module. The integrated module can be realized in the form of hardware or in the form of a software functional module.

[0364] The integrated module, if implemented in the form of a software function module and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in various embodiments of the present application. The aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0365] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method comprises: a first device generates a broadcast message; the first device transmits the broadcast message, the broadcast message comprising first indication information, the first indication information being used to indicate a length of a transmission time interval (TTI).

2. The method of claim 1, wherein, The length of the TTI comprises one or more of the following: 1 radio frame, 2 radio frames, 4 radio frames, 8 radio frames, 16 radio frames, 32 radio frames, or 64 radio frames.

3. The method according to claim 1 or 2, characterized in that, The broadcast message further comprises second indication information, the second indication information being used to indicate a number N of symbols occupied by a control information common search space, N being a positive integer.

4. The method of claim 3, wherein, The control information common 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 N consecutive symbols immediately after a synchronization signal. Alternatively, the control information common search space occupies N consecutive symbols immediately after identification information, the identification information being used to identify the first device. Alternatively, the control information common search space occupies N consecutive symbols immediately after the broadcast message. Alternatively, the control information common search space occupies N consecutive symbols immediately after a reference signal.

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

7. The method of claim 6, wherein, The third indication information comprises a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Alternatively, the third indication information comprises a starting symbol index of the time domain resources and a number of symbols of the time domain resources.

8. The method according to claim 6 or 7, characterized in that, The third indication information further comprises a link type indication, the link type indication being used to indicate that the time domain resources are used by the second device to transmit or receive data.

9. The method of any one of claims 1 to 5, one TTI comprising a first type of radio frame; wherein the first type of radio frame comprising a first symbol, a second symbol, and at least one guard interval, the first symbol being a symbol transmitted by the first device to a second device, the second symbol being a symbol transmitted by the second device to the first device.

10. The method of any one of claims 1 to 5, one TTI comprising a second type of radio frame; wherein the second type of radio frame comprising only first symbols, the first symbols being symbols transmitted by the first device to a second device.

11. The method of any one of claims 1 to 5, one TTI comprising a first type of radio frame and a second type of radio frame; wherein the first type of radio frame comprising a first symbol, a second symbol, and at least one guard interval, the second type of radio frame comprising only first symbols, the first symbols being symbols transmitted by the first device to a second device, the second symbol being a symbol transmitted by the second device to the first device.

12. The method of any one of claims 1 to 5, one TTI comprising 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 comprising a first symbol, a second symbol, and at least one guard interval, the second type of radio frame comprising only first symbols, the first symbols being symbols transmitted by the first device to a second device, the second symbol being a symbol transmitted by the second device to the first device. wherein The first type of radio frame comprises a first symbol, a second symbol and at least one guard interval, the second type of radio frame comprises only the first symbol, the third type of radio frame comprises only the second symbol, the first symbol is a symbol transmitted by the first device to a second device, and the second symbol is a symbol transmitted by the second device to the first device.

13. The method of any one of claims 11 or 12, when the last radio frame in the TTI is the first type of radio frame, the last radio frame comprises two guard intervals, wherein, One guard interval is located between the first symbol and the second symbol of the last radio frame, and another guard interval is located after the last symbol. Alternatively, the first type of radio frame in the TTI is not the last one, and the first type of radio frame comprises a guard interval, which is located between the first symbol and the second symbol of the first type of radio frame.

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

16. The method of claim 9, wherein, The method further comprises: The first device transmits identification information, the identification information being used to identify the first device, and the identification information further comprising fourth indication information, the fourth indication information being used to indicate the configuration of the first symbol and the second symbol in the first type of radio frame.

17. The method of any one of claims 10 to 12, the method further comprising: The first device transmits identification information, the identification information being used to identify the first device, and the identification information further comprising fourth indication information, the fourth indication information being used to indicate the configuration of the radio frames in a TTI.

18. The method of claim 11 or 12, the method further comprising: The first device transmits identification information, the identification information being used to identify the first device, and the identification information further comprising fourth indication information, the fourth indication information being used to indicate the configuration of the radio frames in a TTI and the configuration of the first symbol and the second symbol in the first type of radio frame.

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

20. The method of claim 19, wherein, The length of the TTI comprises one or more of the following: 1 radio frame, 2 radio frames, 4 radio frames, 8 radio frames, 16 radio frames, 32 radio frames, or 64 radio frames.

21. The method of claim 19 or 20, wherein, The broadcast message further comprises second indication information, the second indication information being used to indicate the number of symbols N occupied by a control information common search space, N being a positive integer.

22. The method of claim 21, wherein, The control information common search space occupies N consecutive symbols.

23. The method of claim 21 or 22, wherein, The control information common search space occupies N consecutive symbols immediately after a synchronization signal. Alternatively, the control information common search space occupies N consecutive symbols immediately after identification information, the identification information being used to identify the first device. Alternatively, the control information common search space occupies N consecutive symbols immediately after the broadcast message. Or, the control information common search space occupies the N continuous symbols immediately after the reference signal.

24. The method of any one of claims 21-23, wherein, The method further comprises: The second device receives common control information on all or part of the symbols occupied by the control information common search space, the common control information comprising third indication information, the third indication information being used to indicate time domain resources allocated to the second device within a TTI, the time domain resources being used for the second device to send and / or receive data.

25. The method of claim 24, wherein, The third indication information comprises a starting symbol index of the time domain resources and an ending symbol index of the time domain resources. Or, the third indication information comprises a starting symbol index of the time domain resources and a symbol number of the time domain resources.

26. The method of claim 24 or 25, wherein, The third indication information further comprises a link type indication, the link type indication being used to indicate that the time domain resources are used for the second device to send or receive data.

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

28. The method of any one of claims 19 to 23, wherein the second type of radio frame is included in a TTI. wherein, The second type of radio frame comprises only first symbols, the first symbol being a symbol sent by the first device to the second device.

29. The method of any one of claims 19 to 23, wherein the first type of radio frame and the second type of radio frame are included in a TTI. wherein, The first type of radio frame comprises a first symbol, a second symbol, and at least one guard interval, and the second type of radio frame comprises only first symbols, the first symbol being a symbol sent by the first device to the second device, and the second symbol being a symbol sent by the second device to the first device.

30. The method of any one of claims 19 to 23, wherein the first type of radio frame, the second type of radio frame, and the third type of radio frame are included in a TTI. wherein The first type of radio frame comprises a first symbol, a second symbol, and at least one guard interval, the second type of radio frame comprises only first symbols, and the third type of radio frame comprises only second symbols, the first symbol being a symbol sent by the first device to the second device, and the second symbol being a symbol sent by the second device to the first device.

31. The method of claim 29 or 30, when the last radio frame in the TTI is the first type of radio frame, the last radio frame comprises two guard intervals, wherein, One guard interval is located between the first symbol and the second symbol of the last radio frame, and another guard interval is located after the last symbol. Or, the TTI does not include the first type of radio frame at the end, and the first type of radio frame comprises a guard interval, the guard interval being located between the first symbol and the second symbol of the first type of radio frame.

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

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

34. The method of claim 27, wherein, The method further comprises: The second device receives identification information identifying the first device, the identification information further comprising fourth indication information indicating a configuration of the first symbol and the second symbol in the first type of radio frame.

35. The method of any one of claims 28-30, the method further comprising: The second device receives identification information identifying the first device, the identification information further comprising fourth indication information indicating a configuration of radio frames within a TTI.

36. The method of claim 29 or 30, the method further comprising: The second device receives identification information identifying the first device, the identification information further comprising fourth indication information indicating a configuration of radio frames within a TTI and a configuration of the first symbol and the second symbol in the first type of radio frame.

37. A communications device, characterized by comprising means for performing the method of any one of claims 1-18, or means for performing the method of any one of claims 19-36.

38. A communications device, characterized by comprising: one or more processors coupled with one or more memories; wherein the one or more memories are configured to store a computer program and the one or more processors are configured to execute the computer program stored in the one or more memories to cause the communication apparatus to perform the method of any one of claims 1-18, or to perform the method of any one of claims 19-36.

39. A communications device, characterized by comprising logic circuitry and interfaces coupled thereto; the interfaces are configured to input and / or output information and the logic circuitry is configured to perform the method of any one of claims 1-36.

40. A readable storage medium characterized by, a program stored for execution by one or more processors to cause an apparatus comprising the one or more processors to perform the method of any one of claims 1-36.

41. A computer program product, characterised in that, the computer program product, when executed, performs the method of any one of claims 1-36.

42. A communication system, characterized by comprising a first device configured to perform the method of any one of claims 1-18 and a second device configured to perform the method of any one of claims 19-36.

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