Communication method and communication apparatus

Abstract

Provided in the embodiments of the present application are a communication method and a communication apparatus. The method comprises: a base station sending configuration information, which configuration information is used for indicating a first resource of control information and a second resource of first information, wherein second information is at least one of synchronization information or channel information, and the first resource is associated with the second resource. The base station and a terminal exchange the control information on the first resource, and exchange the synchronization information or the channel information on the second resource. In the method, by means of associating the resource of control information and the resource of synchronization information or channel information, synchronization or channel measurement can be completed in a timely manner when the terminal has a data transmission demand, thereby avoiding power consumption caused by a base station periodically sending a common signal for terminal synchronization, or avoiding signaling overheads brought to the base station and the terminal due to the terminal periodically reporting information.

Description

Communication method and communication device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 3, 2023, with application number 202311467027.7 and application name “A Communication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communications, and in particular to a communication method and a communication device. Background Art

[0003] With the evolution of communication technology, the spectrum used by wireless communications is becoming increasingly wider, and the number of transmit antennas in base stations is increasing, resulting in higher power consumption. At the same time, the frequency bands used in network deployments are increasing, and coverage is shrinking. This leads to denser base station deployments and higher power consumption across the network. For example, the power consumption of a single 5G base station is typically 2-3 times that of a typical 4G base station.

[0004] In current communication systems, base stations need to periodically transmit common signals to facilitate network identification and access by mobile devices. For cells with little or no service transmission demand, base stations still need to periodically transmit common signals, resulting in significant base station overhead. Consequently, achieving energy efficiency in base stations has attracted increasing attention. One of the primary technical approaches to reducing base station energy consumption is to reduce the number of signals transmitted by the base station.

[0005] Summary of the Invention

[0006] The present application provides a communication method and a communication device, which are beneficial to energy saving of network equipment.

[0007] In a first aspect, a communication method is provided, which is applied to a terminal device. The method can be executed by the terminal device, or by a component of the terminal device, such as a processor, chip, or chip system of the terminal device, or can be implemented by a logic module or software that can implement all or part of the terminal device functions. Taking the method as an example in which the method can be executed by the terminal device, the method includes: the terminal device receives configuration information, the configuration information indicating a first resource and a second resource, the first resource being a resource for control information, the control information being used to schedule data transmission, and the second resource being a resource for first information, the first information being a resource for channel information and / or synchronization information; the terminal device receives control information on the first resource, and receives synchronization information or sends channel information on the second resource, wherein the first resource and the second resource are associated.

[0008] In a possible implementation, the first resource and the second resource are associated, specifically, the first resource and the second resource are separated by M time units in the time domain, where M is a positive integer.

[0009] In one possible implementation, the first resource and the second resource are associated, specifically, the first resource and the second resource are located in the same time unit, or the first resource and the second resource belong to the same transmission structure. In this manner, the transmission of the first information and the transmission of the control information are completed in a relatively short period of time, avoiding frequent transmission and reducing power consumption of terminal devices and network equipment. When the first resource and the second resource belong to the same frame structure, this approach enables the base station to complete scheduling with less signaling overhead.

[0010] In a possible implementation manner, the first resource and the second resource are associated, specifically, the first resource and the second resource are continuous in the time domain.

[0011] In this mode, the first resource and the second resource are continuous in the time domain, which can enable the terminal device to quickly complete synchronization when there is a data transmission demand, or quickly align channel information with the network device. In this mode, the transmission of the first information and the transmission of the control information can be continuous, and the network device and the terminal device can quickly align the first information and control information, reducing the time proportion of the first information and control information transmission and reducing the power consumption of the terminal device and the network device.

[0012] In a possible implementation, the second resource is located before the first resource.

[0013] In this mode, the terminal device receives synchronization information before receiving control information. This improves the reliability of the terminal's reception of scheduling information. Furthermore, since control information is used to schedule data transmission, receiving synchronization information before data transmission and control information gives the terminal more time to complete synchronization.

[0014] In a possible implementation, the second resource is located after the first resource. In a possible implementation, the first resource and the second resource are associated, specifically, the first resource and the second resource are located within a first time window.

[0015] In one possible implementation, the first time window satisfies at least one of the following: the start time unit of the first time window is the start time unit of the second resource, or the end time unit of the first time window is the end time unit of the first resource.

[0016] In one possible implementation, the first resource and the second resource are associated, specifically, the second resource of the terminal device determines a second time window, and the first resource is located within the second time window; or, the terminal device determines a second time window based on the first resource, and the second resource is located within the second time window.

[0017] In one possible embodiment, the second time window satisfies one or more of the following: the X1th time unit after the first resource is the time unit where the second time window starts, or the X2th time unit after the first resource is the time unit where the second time window ends.

[0018] In a possible implementation, the terminal device receives synchronization information or sends channel state information at the K1th time unit after the first resource, or the terminal device receives synchronization information after the K1th time unit after the first resource.

[0019] In one possible implementation, the terminal device receives synchronization information or sends channel information before the K2th time unit after the first resource, or the terminal device completes receiving synchronization information or sending channel information before the K2th time unit after the first resource.

[0020] In a possible implementation, the second resource is separated from the first resource by a first time length, and the first time length is less than or equal to a length of the second time window.

[0021] In one possible implementation, the control information is received on the first resource, and the synchronization information is received or the channel information is sent on the second resource; specifically: when the synchronization information is received on the second resource, the control information is received on the first resource.

[0022] In this mode, the terminal device can receive control information after receiving synchronization information or sending channel information. This avoids the situation where the terminal device fails to complete synchronization or fails to align channel information with the network device, and still receives control information, resulting in transmission abnormalities.

[0023] In a possible implementation manner, the synchronization information is a downlink reference signal, or the synchronization information is time-frequency information.

[0024] In a possible implementation, the synchronization information is SSB or TRS.

[0025] In a possible implementation, the method further includes: sending second information, where the second information is used to trigger the network device to send the synchronization information.

[0026] In this manner, the second information can be understood as synchronization information request information, and the network device can send the synchronization information after the terminal device requests the network device to send the synchronization information, which can further save the power consumption of the network device.

[0027] In a possible implementation manner, the channel information is an uplink reference signal, or the channel information is channel state information.

[0028] In a possible implementation, the channel information is channel state information, and the method further includes: the terminal device receives a channel state information reference signal, and sends the channel state information based on the channel state information reference signal.

[0029] In one possible implementation, before the terminal device receives the configuration information, the method further includes: the terminal sends a first uplink signal, and the first uplink signal is used to trigger the network device to send at least one of the control information, the synchronization information or the channel information.

[0030] In this mode, the first uplink signal can also be understood as a wake-up signal. The network device receives the first uplink signal and then sends one or more of the control information, the synchronization information or the channel information. In the case where the first uplink signal is not received, the network device may not send one or more of the control information, the synchronization information or the channel information in the corresponding cell, thereby achieving energy saving of the network device.

[0031] In a possible implementation manner, the first uplink signal is associated with the control information in the time domain.

[0032] In a second aspect, a communication method is provided, which is applied to a network device. The method can be executed by the network device, or by a component of the network device, such as a processor, chip, or chip system of the network device. It can also be implemented by a logic module or software that can implement all or part of the network device functions. Taking the method as an example of a terminal device being able to execute the method, the method includes: the network device sends configuration information, the configuration information indicating a first resource and a second resource, the first resource being a resource for control information, the control information being used to schedule data transmission, the second resource being a resource for first information, the first information being a resource for channel information and / or synchronization information, wherein the first resource and the second resource are associated.

[0033] In this manner, the resources for control information are associated with the resources for first information, so that the network device does not need to frequently send or receive the first information, and the terminal device can also complete synchronization in a timely manner when there is a need for data transmission, and / or align channel information with the network device in a timely manner. Through the above method, the network device can use a longer period to send a common signal to enable the terminal to access the network, or the network device enters an energy-saving mode, and when there is a need for data transmission, the resources for control information, synchronization information, or channel information are configured through configuration information.

[0034] In an optional manner, the network device sends control information on the first resource, and sends synchronization information or receives channel information on the second resource.

[0035] In an optional manner, the synchronization information is time-frequency information, and the method further includes: the network device receives second information, and the second information is used to trigger the network device to send the synchronization information.

[0036] In an optional manner, the channel information is channel state information, and the method further includes: the network device sends a channel state information reference signal.

[0037] In a possible implementation manner, the channel information is channel state information, and the method further includes: the network device sending a channel state information reference signal.

[0038] In one possible implementation, before the network device sends the configuration information, the method further includes: the network device receives a first uplink signal, and the first uplink signal is used to trigger the network device to send at least one of the control information, the synchronization information or the channel information.

[0039] In this manner, the first uplink signal can also be understood as a wake-up signal, used to enable the network device to switch from energy-saving mode to communication mode. Upon receiving the first uplink signal, the network device transmits one or more of the control information, the synchronization information, or the channel information. However, if the first uplink signal is not received, the network device may not transmit one or more of the control information, the synchronization information, or the channel information in the corresponding cell, thereby achieving energy conservation for the network device.

[0040] Some possible implementation methods and beneficial effects of the second aspect can be referred to the first aspect and will not be repeated here.

[0041] In a third aspect, a communication device is provided, configured to implement the communication method of the first aspect. The communication device may be the terminal device of the first aspect, or a device included in the first terminal device, such as a chip. The communication device includes modules, units, or means corresponding to the aforementioned method. The modules, units, or means may be implemented in hardware, software, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules or units corresponding to the aforementioned functions.

[0042] In one possible embodiment, the communication device includes a receiving unit for receiving configuration information, control information, and synchronization information; or, the communication device includes a receiving unit and a sending unit, the receiving unit is used to receive control information, and the sending unit is used to send channel information.

[0043] Regarding some possible implementation methods and descriptions of the third aspect regarding configuration information, control information, synchronization information and channel information, please refer to the first aspect and will not be repeated here.

[0044] In a fourth aspect, a communication device is provided, which is used to implement the communication method of the second aspect. The communication device can be the network device of the second aspect, or a device included in the network device, such as a chip. The communication device includes a module, unit, or means corresponding to the above method. The module, unit, or means can be implemented by hardware, software, or hardware executing the corresponding software implementation. The hardware or software includes one or more modules or units corresponding to the above functions.

[0045] In one possible embodiment, the communication device includes a sending unit for sending configuration information, control information and synchronization information, or the communication device includes a receiving unit and a sending unit, the receiving unit is used to receive channel information, and the sending unit is used for configuration information, control information and synchronization information.

[0046] Regarding the fourth aspect, some possible implementation methods and descriptions of configuration information, control information, synchronization information and channel information can be referred to the second aspect and will not be repeated here.

[0047] In a fifth aspect, a computer-readable storage medium is provided, comprising instructions, which, when executed, enable any possible method in the first aspect to be implemented, or enable any possible method in the second aspect to be implemented.

[0048] In a sixth aspect, a communication system is provided, comprising at least one communication device as described in the third aspect, and at least one communication device as described in the second aspect.

[0049] In the seventh aspect, a communication method is provided, including: a network device sends configuration information, the configuration information indicates a first resource and a second resource, the first resource is a resource for control information, the control information is used to schedule data transmission, the second resource is a resource for the first information, and the first information is a resource for channel information and / or synchronization information; the terminal device receives control information on the first resource, and receives synchronization information or sends channel information on the second resource, wherein the first resource and the second resource are associated.

[0050] Some possible implementations of the seventh aspect can refer to the relevant description of the first aspect and will not be repeated here.

[0051] In an eighth aspect, a computer program product is provided, comprising instructions, which, when executed, enable any one of the methods described in the first aspect to be implemented, or enable any one of the methods described in the second aspect to be implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] FIG1 is a schematic diagram of a communication system provided by the present application;

[0053] FIG2 is a schematic diagram of time units of different granularities provided by this application;

[0054] FIG3 is a flow chart of the communication method provided by this application;

[0055] FIG4 is a schematic diagram of the relationship between the first resource and the second resource provided by the present application;

[0056] FIG5 is another schematic diagram of the relationship between the first resource and the second resource provided by the present application;

[0057] FIG6 is another schematic diagram of the relationship between the first resource and the second resource provided by the present application;

[0058] FIG7 is a schematic diagram of a communication device provided by the present application;

[0059] FIG8 is a schematic diagram of another communication device provided in this application. DETAILED DESCRIPTION

[0060] Figure 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. As shown in Figure 1 , the communication system includes a radio access network (RAN) 100. RAN 100 includes at least one RAN node (e.g., 110a and 110b in Figure 1 , collectively referred to as 110) and may also include at least one terminal (e.g., 120a-120j in Figure 1 , collectively referred to as 120). RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1 ). Terminal 120 is wirelessly connected to RAN node 110. Terminals and RAN nodes may be connected to each other via wired or wireless connections. Communication system 1000 may also include a core network 200. RAN node 110 is wirelessly or wiredly connected to core network 200. Core network devices in core network 200 and RAN node 110 in RAN 100 may be separate, distinct physical devices, or they may be a single physical device that integrates the logical functions of core network devices and RAN nodes. The communication system 1000 may also include the Internet 300 .

[0061] RAN100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system defined in the 3rd Generation Partnership Project (3GPP), or a WiFi system. RAN100 can also include two or more of the aforementioned different radio access systems. RAN100 can also be an open RAN (O-RAN).

[0062] A RAN node, also known as a radio access network device, RAN entity, or access node, facilitates wireless access to a communication system by a terminal. In one application scenario, a RAN node can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a fifth-generation (5G) mobile communication system, a next-generation base station in a sixth-generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node can be a macro base station (such as 110a in Figure 1), a micro base station, an indoor station (such as 110b in Figure 1), a relay node, or a donor node.

[0063] In another application scenario, multiple RAN nodes can collaborate to help terminals achieve wireless access, with different RAN nodes implementing portions of the base station's functions. For example, a RAN node can be a centralized unit (CU), a distributed unit (DU), or a radio unit (RU). The CU implements the base station's radio resource control protocol and packet data convergence protocol (PDCP) functions, as well as the service data adaptation protocol (SDAP) functions. The DU implements the base station's radio link control layer and medium access control (MAC) layer functions, as well as some or all of the physical layer functions. For detailed descriptions of each of the above protocol layers, please refer to the relevant 3GPP technical specifications. The RU can be used to implement the transmission and reception of radio frequency signals. The CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as in a baseband unit (BBU). The RU can be included in radio frequency equipment, such as a remote radio unit (RRU) or an active antenna unit (AAU). The CU can be further divided into two types of RAN nodes: CU-control plane and CU-user plane.

[0064] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU may be called an open CU (O-CU), a DU may be called an open DU (O-DU), and a RU may be called an open RU (O-RU). The RAN node in the embodiments of the present application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module. For example, the RAN node may be a server loaded with the corresponding software module. The embodiments of the present application do not limit the specific technology and specific device form adopted by the RAN node. For ease of description, the following description takes a base station as an example of a RAN node.

[0065] A terminal is a device with wireless transceiver capabilities that can send signals to a base station or receive signals from a base station. A terminal may also be referred to as a terminal device, user equipment (UE), mobile station, mobile terminal, etc. Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IoT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. A terminal can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of this application do not limit the specific technology and specific device form adopted by the terminal.

[0066] Base stations and terminals can be fixed or mobile. They can be deployed on land, indoors or outdoors, handheld or vehicle-mounted; on water; or on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0067] The roles of base stations and terminals can be relative. For example, the helicopter or drone 120i in Figure 1 can be configured as a mobile base station. To terminals 120j accessing the wireless access network 100 via 120i, terminal 120i is a base station. However, to base station 110a, 120i is a terminal, meaning that communication between 110a and 120i occurs via a wireless air interface protocol. Of course, communication between 110a and 120i can also occur via a base station-to-base station interface protocol. In this case, 120i is also a base station relative to 110a. Therefore, base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be referred to as communication devices with base station functionality, while 120a-120j in Figure 1 can be referred to as communication devices with terminal functionality.

[0068] Communication between base stations and terminals, between base stations, and between terminals can be carried out through authorized spectrum, unauthorized spectrum, or both; communication can be carried out through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0069] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem that includes the base station functions. The control subsystem that includes the base station functions here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or modem) in the terminal, or by a device that includes the terminal functions.

[0070] In this application, a base station sends downlink signals or downlink information to a terminal, and the downlink information is carried on a downlink channel; the terminal sends uplink signals or uplink information to the base station, and the uplink information is carried on an uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection in the cell controlled by the base station. The cell with which the terminal has established a wireless connection is called the serving cell of the terminal. When the terminal communicates with the serving cell, it will also be interfered with by signals from neighboring cells.

[0071] For the convenience of description, the terms involved in this application are described in detail below.

[0072] (1) Time unit

[0073] A time unit is a time domain unit used for signal transmission. It is a granularity in the time domain, and a time unit consists of multiple symbols. Alternatively, a time unit can be a radio frame, a subframe, a slot, a mini-slot, or a symbol. Figure 2 shows an example of the relationship between time units of different granularities. In Figure 2, the time domain length of a radio frame is 10ms. A radio frame can include 10 subframes, and the time domain length of a subframe is 1ms. A subframe can include one or more time slots, and the specific number of time slots included in a subframe is related to the subcarrier space (SCS). For the case where the SCS is 15kHz, the time domain length of a time slot is 1ms. A time slot includes 14 symbols.

[0074] (2) Channel information

[0075] As a signal travels from the transmitter to the receiver through a wireless channel, it may experience scattering, reflection, and energy attenuation with distance, resulting in fading. Channel information is used to characterize the characteristics of the wireless channel and carries channel-related channel content. Communication devices typically obtain channel information through reference signals and channel measurements. A reference signal is a known signal provided by the transmitter to the receiver for channel estimation or channel detection. Reference signals can be used for channel measurement, interference measurement, etc. For example, a terminal obtains channel information by measuring parameters such as reference signal receiving quality (RSRQ) and signal-to-noise ratio (SNR). A downlink reference signal can be, for example, a channel state information-reference signal (CSI-RS). The base station sends the CSI-RS to the terminal, and the terminal measures the channel based on the CSI-RS, obtains channel state information (CSI), and reports the CSI to the base station. This aligns the terminal and base station's understanding of the channel state. The uplink reference signal may be, for example, a sounding reference signal (SRS). The terminal sends the SRS to the base station, and the base station measures the channel according to the SRS to obtain the channel state.

[0076] Channel information reporting methods are categorized into three types: periodic reporting, semi-static reporting, and aperiodic reporting. For periodic and semi-static reporting, channel information is assigned periodic transmission resources. The base station and terminal send or receive channel information based on the assigned periodic transmission resources. Aperiodic channel information reporting is triggered by the base station sending downlink control information. Furthermore, aperiodic channel information reporting is typically a one-time transmission; the terminal completes the channel information transmission once it transmits the information. To ensure the timeliness of channel information, the base station configures periodic channel information reporting for the terminal.

[0077] The above analysis shows that in current communication systems, the configuration of channel information and synchronization information is independent of data transmission. The base station periodically sends synchronization information to achieve terminal synchronization, or the terminal periodically reports channel information to obtain channel status.

[0078] (3) Synchronous information

[0079] In this application, the information used to complete the synchronization of the communication device is referred to as synchronization information. The synchronization can include at least one of time domain synchronization and frequency domain synchronization. In the current NR communication system, there are two main signals used for time and frequency synchronization: synchronization signal and PBCH block (SSB) and TRS.

[0080] The SSB is a periodically transmitted common signal that occupies 20 resource blocks (RBs) in the frequency domain. The SSB consists of two parts: the synchronization signal (SS) and the physical broadcast channel block (PBCH). The SS includes the primary synchronization signal (PSS) and the secondary synchronization signal (SSS). Therefore, the SSB can be considered to consist of three parts: the PSS, the SSS, and the PBCH. Terminals periodically detect the SSB and achieve preliminary time-frequency synchronization (hereinafter referred to as primary synchronization) based on the received SSB. In addition to the SSB, the base station can also transmit a tracking reference signal (TRS) for terminal synchronization. In the frequency domain, the TRS transmits more pilot signals, resulting in higher resolution for timing deviation measurement. In the time domain, the SSS and PSSS are generally separated by two symbols, while the TRS occupies two consecutive time slots. Within each time slot, the TRS transmission resources are separated by four symbols, resulting in higher resolution for frequency deviation measurement. Therefore, TRS offers higher synchronization accuracy than SSB. TRS can be considered a special type of CSI-RS, and terminals can achieve more refined time-frequency synchronization based on TRS (hereinafter referred to as secondary synchronization). Similar to the aforementioned channel information reporting, TRS also supports periodic, semi-static, or aperiodic transmission. To ensure the immediacy of terminal time-frequency synchronization, the base station configures periodic TRS transmission for the terminal.

[0081] (4) Transmission structure

[0082] A transmission structure can be understood as the transmission of multiple messages as a whole. That is, from the perspective of the sender, all messages within the transmission structure should be sent at once; from the perspective of the receiver, all messages within the transmission structure should be received at once. A transmission structure can be a frame structure, an independent transmission channel, or a fixed format.

[0083] (5) Base station energy saving

[0084] Base stations need to periodically transmit common signals to facilitate terminal identification and network access. For cells with no or minimal service transmission requirements, the base station still needs to periodically transmit common signals, resulting in high base station overhead. One possible energy-saving approach is to have the base station and terminal only transmit common signals over long periods of time. By lengthening the common signal transmission period, the base station reduces the frequency of common signal transmission, achieving energy conservation. In this approach, the base station cannot obtain the terminal's channel information in a timely manner, and the terminal may not be able to access the network in a timely manner. When data transmission is required, the base station cannot provide accurate scheduling for the terminal in a timely manner. Furthermore, due to the long common signal transmission period, the terminal's time-frequency synchronization period is also long, resulting in lower data transmission reliability when the data transmission rate is high.

[0085] Based on the above analysis, the present application proposes a communication method, which associates the configuration of channel information and / or synchronization information with the scheduling of data transmission, thereby ensuring the receiving performance on the terminal side without increasing the burden on the base station.

[0086] FIG3 is a schematic diagram of a communication method provided by the present application. The method shown in FIG3 includes steps S301 to S302.

[0087] S301: The base station sends configuration information, and correspondingly, the terminal receives the configuration information.

[0088] Specifically, the configuration information indicates a first resource and a second resource, the first resource is a resource of control information, the control information is used to schedule data transmission, the second resource is a resource of the first information, and the first information is a resource of channel information and / or synchronization information.

[0089] In one possible manner, the configuration information is a cell, which configures the first resource and the second resource at the same time. In another possible manner, the configuration information is multiple cells, and different cells configure the first resource and the second resource respectively, or multiple cells configure the first resource and the second resource together.

[0090] S302: The terminal receives control information on the first resource, and receives synchronization information or sends channel information on the second resource.

[0091] Specifically, the terminal can obtain the first resource and the second resource through the configuration information in step S301, and the terminal receives or sends information on the corresponding resources.

[0092] The synchronization information in this application is information that can be used for terminal synchronization. In one possible manner, the synchronization information may be time-frequency information, and the time-frequency information may include at least one of a timing offset or a frequency offset. The terminal adjusts the timing and frequency according to the time-frequency information, thereby achieving synchronization. For example, the synchronization information is SSB. In another possible manner, the synchronization information is downlink reference information, and the terminal obtains the timing offset or frequency offset based on the reference information measurement, corrects the time and frequency, and thus completes the synchronization. For example, the synchronization information is TRS. It should be noted that when the synchronization information is a reference signal, for example, when the synchronization information is TRS, it can be assumed that the terminal has completed the first-level synchronization, and the terminal completes the second-level synchronization based on TRS.

[0093] Channel information in this application refers to information that can be used for channel measurement, or can be understood as information sent by a transmitter that can be used by a receiver to determine the channel state. In one possible embodiment, the channel information is an uplink reference signal (SRS), used by a base station to measure the channel and determine the channel state. In another possible embodiment, the channel information is the channel state measured by a terminal and reported to the base station, for example, the channel information is CSI.

[0094] In one possible approach, the first resource and the second resource are associated. In this approach, by associating the first resource with the second resource, that is, by associating the configuration of the control information for scheduling data transmission with the configuration of the first information, the terminal and the base station can promptly complete channel measurement or synchronization when data transmission is required. The base station does not need to frequently send common signals, which is beneficial to base station energy conservation and can also avoid communication anomalies caused by the terminal and base station failing to complete synchronization or base station alignment channel state information during data transmission.

[0095] This application provides the following possible implementations for the association relationship between the first resource and the second resource in the time domain. That is, the association between the first resource and the second resource in this application can be replaced by the following methods.

[0096] In one embodiment, the first resource and the second resource are separated by M time units in the time domain, where M is a positive integer. This embodiment is also understood as associating the first resource and the second resource by setting the interval between the first resource and the second resource in the time domain. In this embodiment, if the first information includes synchronization information and channel information, optionally, the second resource includes resource A and resource B, resource A is a resource for synchronization information, and resource B is a resource for channel information. Resource A and resource B can be separated by a certain time unit, for example, by N time units, or resource A and resource B can also be continuous. For example, FIG4 shows an example of resource A and resource B being separated by N time units. In FIG4, the time interval is taken as the interval between the time unit where the end position of resource A is located and the time unit where the start position of resource B is located. The time unit in this application can also be the interval between the time units where the starting positions of the two resources are located, or the interval between the time units where the end positions of the two resources are located, or the interval between the time unit where the starting position of one resource is located and the time unit where the end position of the other resource is located.

[0097] Mode 2: The second resource and the first resource are continuous in the time domain. Mode 2 can also be understood as the case when M is 0 in Mode 1. When the second resource includes resource A for synchronization information and resource B for channel information, resource A and resource B can also be continuous, that is, N can be equal to 0. Figure 5 shows an example in which the second resource and the first resource can be continuous in the time domain. In Figure 5, resource A, resource B and the first resource are continuous in the time domain. It should be noted that the first resource and the second resource in the present application are continuous in the time domain, which can also be replaced by the description that the last time unit of the first resource is adjacent to the starting time unit of the second resource, and the next time unit of the last time unit of the first resource is the starting time unit of the second resource, or the last time unit of the second resource is adjacent to the starting time unit of the first resource, and the next time unit of the last time unit of the second resource is the starting time unit of the first resource. Alternatively, the time unit where the end position of the second resource is located is continuous with the time unit where the starting position of the first resource is located, or the time unit where the end position of the first resource is located is continuous with the time unit where the starting position of the second resource is located.

[0098] Mode three, the first resource and the second resource are located within the first time window. In this mode, the first resource and the second resource are associated by setting them to be located within a time window. In this mode, in one possible implementation, the second resource is located before the first resource, the start time unit of the first time window is the start time unit of the second resource, and the end time unit of the first time window is the end time unit of the first resource. In another possible implementation, the second resource is located after the first resource, the start time unit of the first time window is the start time unit of the first resource, and the end time unit of the first time window is the end time unit of the second resource. The length of the first time window can be configured or predefined. When the length of the first time window is configured, the first time window can be configured by the configuration information in S301. In one possible mode, in Figure 6, it is continuous or spaced by N time units. Figure 6 shows an example of mode three. Among them, resource A included in the second resource is located before resource B, and resource A and resource are discontinuous in the time domain. The starting time unit of the first time window is the starting time unit of resource A, and the ending time unit of the first time window is the ending time unit of the first resource.

[0099] Mode 4: The first resource and the second resource are located in the same time unit. This mode can also be understood as the case in Mode 3 where the first time window is a single time unit. For example, the first resource and the second resource are located in the same time slot. For example, the first resource and the second resource are located in the same time slot or the same subframe. When the second resource includes synchronization information resource A and channel information resource B, that is, the synchronization information resource, the channel information resource, and the control information resource are located in the same time unit.

[0100] Mode five: the first resource and the second resource belong to the same transmission structure, for example, the first resource and the second resource are the same frame structure.

[0101] Mode six, the terminal determines the second time window based on the first resource, and the second resource is located in the second time window. Under this mode, for the first information, the base station can configure multiple candidate resources for the transmission of the first information, and the candidate resource of the first information located in the second time window is the second resource. For example, the first information is synchronization information, and the configuration information configures a transmission resource (such as the first information) for the synchronization information, and the configuration of the transmission resource is located in the second time window. For another example, the configuration information configures multiple candidate resources for the synchronization information, and the terminal receives the synchronization information on the candidate resource of the synchronization information located in the second time window. For example, the first information is channel information, and the configuration information configures a transmission resource for the channel information, and the transmission resource is located in the second time window, or the configuration information configures multiple candidate resources for the channel information, and the terminal sends the channel information on the candidate resource of the channel information located in the second time window.

[0102] Under mode six, in one possible mode, the second time window satisfies one or more of the following: the X1th time unit after the first resource is the time unit where the starting position of the second time window is located, or the X2th time unit after the first resource is the time unit where the ending position of the second time window is located. In another possible mode, from the perspective of the behavior of the terminal, the second time window can also be understood as the time domain range for receiving synchronization information or sending channel information determined according to the first resource, for example, the terminal device receives synchronization information or sends channel state information at the K1th time unit after the first resource, or the terminal device receives synchronization information after the K1th time unit after the first resource. Alternatively, the terminal device starts receiving synchronization information or sending channel information before the K2th time unit after the first resource, or the terminal device completes receiving synchronization information or sending channel information before the K2th time unit after the first resource. For example, the time unit is a symbol, and the terminal device starts receiving synchronization information or sending channel information after the K2th symbol after the first resource. For another example, the time unit is a time slot, and the terminal device receives synchronization information or sends channel information in the next time slot of the time slot where the first resource is located.

[0103] In mode 7, the terminal determines a second time window based on the second resource, and the candidate transmission resource for the control information in the second time window is the first resource. Mode 7 is similar to mode 6. For the control information, the first information is channel information, and the configuration information configures a transmission resource (i.e., the first resource) for the control information, which is located within the second time window. Alternatively, the base station can configure multiple candidate resources for control information transmission, and the candidate resource for control information in the second time window is the first resource.

[0104] Based on the association between the first resource and the second resource, in one possible manner, the second resource is located before the first resource, that is, the terminal first receives the synchronization information and / or sends the channel information and then receives the control information. In this manner, optionally, in order to further save energy, the present application also decides whether to receive the control information based on the transmission status of the first information. For example, the first information is synchronization information. For the terminal, when the synchronization information is received on the second resource, the terminal receives the control information on the first resource. If the terminal does not receive the synchronization information, the terminal may not detect the control information. This method can avoid the waste of power consumption caused by the terminal failing to successfully complete synchronization but still receiving the control information, thereby reducing the overhead of the terminal device. Similarly, if the first information is channel information, the terminal receives the control information on the first resource when the channel information is successfully sent. If the terminal fails to successfully send the channel information, the terminal may not receive the control information. For the base station, optionally, if the base station does not receive the channel information, it may not send the control information, which can further reduce the power consumption of the base station.

[0105] It should be noted that the second resource may also be located after the first resource, that is, the terminal may first receive the control information and then receive the synchronization information and / or send the channel information.

[0106] In one possible approach, the channel information is uplink, i.e., the channel information is sent by the terminal. In this approach, before the terminal sends the channel information, the method shown in FIG3 further includes: the terminal receiving a downlink reference signal and sending the channel information based on the reference. For example, if the channel information is CSI, the reference signal is CSI-RS.

[0107] In one possible embodiment, before step S301, the method shown in Figure 3 further includes step S300: the terminal sends second information, where the second information is used to trigger the network device to send synchronization information. That is, in this possible embodiment, the base station only sends synchronization information after the terminal sends the second information, that is, when the terminal requires synchronization information. This can further reduce power consumption of the terminal and the base station. The second information can also be understood as request information for one or more of synchronization information, channel information, or control information.

[0108] In one possible embodiment, the method shown in Figure 3 further includes: the terminal sending a first uplink signal, where the first uplink signal is used to trigger one or more of configuration information, control information, synchronization information, or channel information. In this embodiment, the first uplink signal can also be understood as a wake-up signal, which is used to enable the base station to switch from an energy-saving state or a sleep state to a normal communication mode. For example, the base station obtains, through the first uplink signal, that the terminal has an access or data transmission requirement, thereby sending one or more of configuration information, control information, synchronization information, or channel information.

[0109] In one possible manner, the first uplink signal is associated with the control information, or in other words, the resource of the first uplink signal is associated with the first resource. The association relationship between the first uplink signal and the first resource can refer to manners one to seven in step S201. For example, the resource of the first uplink signal and the first resource are located within the first time window. In this manner, the first uplink signal, synchronization information, channel information and control information can be centrally distributed within the first time window to achieve fast synchronization of the terminal or fast channel information reporting, so that the terminal and the base station can exchange data services based on the control information. For another example, the resource of the first uplink signal is separated from the first resource by N time units. For another example, the resource of the first uplink signal, the second resource and the first resource are continuously distributed in the time domain.

[0110] It should be noted that the above-mentioned first information can be synchronization information or channel information. When the first information is synchronization information and channel information, the second resource also includes resource A of synchronization information and resource B of channel information. Resource A and resource B can be continuous or discontinuous in the time domain. In other words, the above-mentioned S201 description of the association between the first resource and the second resource also applies to resource A and resource B. For example, similar to the above-mentioned method one, resource A can also be separated from resource B by K time units in the time domain. Similar to the above-mentioned method two, resource A and resource B can also be continuous in the time domain. Similar to method three, resource A, resource B and the first resource are all located in the first time window. Similar to method four, resource A, resource B and the first resource are located in the same time unit. Similar to method five, resource A, resource B and the first resource belong to the same frame structure.

[0111] The aforementioned communication method, through the resource association of scheduling data control information, synchronization information, and channel information, enables terminals to synchronize promptly when data transmission is required, or to align channel information with the base station. The base station can also concentrate the transmission of synchronization information and the reception of channel information on demand. When data transmission is not required, the base station can enter a power-saving state, reducing signal transmission and thus achieving energy conservation.

[0112] It is understood that, in order to implement the functions in the above embodiments, the base station and the terminal include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily appreciate that, in conjunction with the units and method steps of the various examples described in the embodiments disclosed in this application, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in hardware or in a computer software-driven hardware manner depends on the specific application scenario and design constraints of the technical solution.

[0113] Figures 7 and 8 are schematic diagrams of the structures of possible communication devices provided in embodiments of the present application. These communication devices can be used to implement the functions of the terminal or base station in the above-mentioned method embodiments, and thus can also achieve the beneficial effects possessed by the above-mentioned method embodiments. In the embodiments of the present application, the communication device can be the terminal 120 shown in Figure 1, or the base station 110 shown in Figure 1, or a module (such as a chip) applied to the terminal or base station.

[0114] As shown in Figure 7, a communication device 700 includes a transceiver unit 710. Optionally, it may further include a processing unit 720. The communication device 700 is used to implement the functions of a terminal or a base station in the method embodiment shown in Figure 3 above.

[0115] When the communication device 700 is used to implement the functions of the terminal in the method embodiment shown in Figure 3, the transceiver unit 710 is used to receive configuration information, where the configuration information indicates a first resource and a second resource, where the first resource is a control information resource, where the control information is used to schedule data transmission, and the second resource is a first information resource, where the first information is a channel information and / or synchronization information resource; further, the transceiver unit is also used to receive synchronization information and / or send channel information. In one possible embodiment, the communication device may further include a processing unit 720, where when the first information is channel information, the transceiver unit is further used to receive a downlink reference signal, and the processing unit 720 is used to determine the channel information based on the downlink reference signal.

[0116] In a possible manner, the transceiver unit 710 is further configured to send second information, where the second information is configured to trigger the network device to send synchronization information.

[0117] In one possible manner, the transceiver unit 710 is further configured to send a first uplink signal before receiving the configuration information, where the first uplink signal is used to trigger one or more of the configuration information, control information, synchronization information, or channel information.

[0118] When the communication device 700 is used to implement the function of the base station in the method embodiment shown in Figure 3: the transceiver unit 710 is used to send configuration information, the configuration information indicates a first resource and a second resource, the first resource is a resource of control information, the control information is used to schedule data transmission, the second resource is a resource of the first information, and the first information is a resource of channel information and / or synchronization information.

[0119] In a possible manner, the transceiver unit 710 is further configured to send synchronization information or receive channel information.

[0120] In one possible manner, the transceiver unit 710 is further configured to receive second information, and the second information is used to trigger the communication device 700 to send synchronization information. In this manner, optionally, the communication device 700 further includes a processing unit 720, which is configured to determine to send synchronization information according to the second information.

[0121] In one possible embodiment, before sending the configuration information, the transceiver unit 710 further receives a first uplink signal, where the first uplink signal is used to trigger one or more of the configuration information, control information, synchronization information, or channel information. The first uplink signal can also be understood as a wake-up signal. In this embodiment, the processing unit 720 is optionally configured to determine wake-up based on the first uplink signal, or switch from a dormant state to an active state based on the first uplink signal, or switch from an energy-saving mode to a normal communication mode.

[0122] For a more detailed description of the processing unit 720 and the transceiver unit 710 , reference may be made to the relevant description in the method embodiment shown in FIG. 3 .

[0123] As shown in Figure 8, communication device 800 includes an interface circuit 810. In one possible embodiment, communication device 800 also includes a processor 820, and processor 820 and interface circuit 810 are coupled to each other. It is understood that interface circuit 810 can be a transceiver or an input / output interface. Optionally, communication device 800 can also include a memory 830 for storing instructions executed by processor 820, input data required by processor 820 to execute instructions, or data generated after processor 820 executes instructions.

[0124] When the communication device 800 is used to implement the method shown in FIG. 3 , the processor 820 is used to implement the functions of the processing unit 720 , and the interface circuit 810 is used to implement the functions of the transceiver unit 710 .

[0125] When the above-mentioned communication device is a chip applied to a terminal, the terminal chip implements the functions of the terminal in the above-mentioned method embodiment. When the terminal chip receives information from the base station, it can be understood that the information is first received by other modules in the terminal (such as a radio frequency module or antenna) and then sent to the terminal chip by these modules. When the terminal chip sends information to the base station, it can be understood that the information is first sent to other modules in the terminal (such as a radio frequency module or antenna) and then sent to the base station by these modules.

[0126] When the above-mentioned communication device is a chip applied to a base station, the base station chip implements the functions of the base station in the above-mentioned method embodiment. When the base station chip receives information from the terminal, it can be understood that the information is first received by other modules in the base station (such as a radio frequency module or antenna) and then sent to the base station chip by these modules. When the base station chip sends information to the terminal, it can be understood that the information is sent to other modules in the base station (such as a radio frequency module or antenna) and then sent to the terminal by these modules.

[0127] In this application, when entity A sends information to entity B, A can send it directly to B or indirectly to B through another entity. Similarly, when entity B receives information from entity A, entity B can receive the information sent by entity A directly or indirectly through another entity. Entities A and B herein can be RAN nodes or terminals, or modules within a RAN node or terminal. The sending and receiving of information can be information exchange between a RAN node and a terminal, for example, between a base station and a terminal; between two RAN nodes, for example, between a CU and a DU; or between different modules within a device, for example, between a terminal chip and other modules in the terminal, or between a base station chip and other modules within the base station.

[0128] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0129] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and storage medium can also exist in a base station or a terminal as discrete components.

[0130] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0131] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0132] In this application, "at least one" means one or more, and "more" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of this application, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0133] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: The method comprises: Receive configuration information, where the configuration information indicates a first resource and a second resource, where the first resource is a resource of control information, where the control information is used to schedule data transmission, and the second resource is a resource of the first information, where the first information is a resource of channel information and / or synchronization information; receiving control information on the first resource, and receiving synchronization information or sending channel information on the second resource, wherein: The first resource and the second resource are associated.

2. The method according to claim 1, characterized in that: The first resource and the second resource are associated, specifically, the first resource and the second resource are separated by M time units in the time domain, where M is a positive integer.

3. The method according to claim 1 or 2, characterized in that: The first resource and the second resource are associated, specifically, The first resource and the second resource are located in the same time unit, or the first resource and the second resource belong to the same transmission structure.

4. The method according to any one of claims 1 to 3, characterized in that: The first resource and the second resource are associated, specifically, The first resource and the second resource are continuous in the time domain.

5. The method according to any one of claims 1 to 4, characterized in that: The second resource is located before the first resource.

6. The method according to any one of claims 1 to 5, characterized in that: The first resource and the second resource are associated, specifically, the first resource and the second resource are located in a first time window.

7. The method according to claim 6, characterized in that The first time window satisfies at least one of the following: The starting time unit of the first time window is the starting time unit of the second resource, or, The end time unit of the first time window is the first resource end time unit.

8. The method according to any one of claims 1 to 7, characterized in that: The first resource and the second resource are associated, specifically, Determine a second time window according to the second resource, the first resource is located within the second time window; or, A second time window is determined according to the first resource, and the second resource is located within the second time window.

9. The method according to any one of claims 1 to 8, characterized in that: Receiving the control information on the first resource, and receiving synchronization information or sending channel information on the second resource; specifically: In case the synchronization information is received on the second resource, receiving the control information on the first resource; or In a case where the channel information is transmitted on the second resource, the control information is received on the first resource.

10. The method according to any one of claims 1 to 9, characterized in that: The synchronization information is a downlink reference signal, or the synchronization information is time-frequency information.

11. The method according to claim 10, characterized in that The synchronization information is time-frequency information, and the method further includes: sending second information, where the second information is used to trigger the network device to send the synchronization information.

12. The method according to any one of claims 1 to 11, characterized in that: The channel information is an uplink reference signal, or the channel information is channel state information.

13. The method according to any one of claims 1 to 12, characterized in that: The channel information is channel state information, and the method further includes: A channel state information reference signal is received, and the channel state information is sent based on the channel state information reference signal.

14. A communication method, characterized in that: The method comprises: Sending configuration information, where the configuration information indicates a first resource and a second resource, where the first resource is a resource of control information, where the control information is used to schedule data transmission, and the second resource is a resource of the first information, where the first information is a resource of channel information and / or synchronization information; Control information is sent on the first resource, and synchronization information is sent or channel information is received on the second resource, wherein the first resource and the second resource are associated.

15. The method according to claim 14, characterized in that The first resource and the second resource are associated, specifically, the first resource and the second resource are separated by M time units in the time domain, where M is a positive integer.

16. The method according to claim 14 or 15, characterized in that: The first resource and the second resource are located in the same time unit, or the first resource and the second resource belong to the same transmission structure.

17. The method according to any one of claims 14 to 16, characterized in that: The first resource and the second resource are associated, specifically, the first resource and the second resource are continuous in the time domain.

18. The method according to any one of claims 14 to 17, characterized in that: The second resource is located before the first resource.

19. The method according to any one of claims 14 to 18, characterized in that: The first resource and the second resource are associated, specifically, the first resource and the second resource are located in a first time window.

20. The method according to claim 19, characterized in that The first time window satisfies at least one of the following: The starting time unit of the first time window is the starting time unit of the second resource, or, The end time unit of the first time window is the first resource end time unit.

21. The method according to any one of claims 14 to 19, characterized in that: The first resource and the second resource are associated, specifically, Determine a second time window according to the second resource, the first resource is located within the second time window; or, A second time window is determined according to the first resource, and the second resource is located within the second time window.

22. The method according to any one of claims 14 to 21, characterized in that: The synchronization information is a downlink reference signal, or the synchronization information is time-frequency information.

23. The method according to claim 22, characterized in that The synchronization information is time-frequency information, and the method further includes: receiving second information, where the second information is used to trigger the network device to send the synchronization information.

24. The method according to any one of claims 14 to 23, characterized in that: The channel information is an uplink reference signal, or the channel information is channel state information.

25. The method according to any one of claims 14 to 24, characterized in that: The channel information is channel state information, and the method further includes: Send a channel state information reference signal.

26. A communication device, characterized in that: The communication device comprises a unit or module for executing the method according to any one of claims 1-13, or the communication device comprises a unit or module for executing the method according to any one of claims 14-25.

27. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes instructions, and when the instructions are executed, the method of any one of claims 1 to 13 is implemented, or the method of any one of claims 14 to 25 is implemented.

28. A computer program product, characterized in that The computer program product comprises instructions, and when the instructions are executed, the method according to any one of claims 1 to 13 is implemented, or the method according to any one of claims 14 to 25 is implemented.

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