Communication method, apparatus and system

Abstract

A communication method, which can be applied between energy-efficient network devices and terminal devices. The method comprises: on the basis of the result of acquiring a system information block (SIB) 1 of a first cell and the state of the first cell, a terminal device determining whether the first cell is barred from access, wherein the state of the first cell is not broadcasting the SIB1; and when the first cell is not barred from access, the terminal device sending a first message, wherein the first message is used for triggering the SIB1 of the first cell. In the method, by changing the behavior of a terminal device after the terminal device fails to acquire an SIB1, a first cell can be unbarred in advance, and the terminal device is enabled to successfully send a WUS or a request message, thereby reducing the time delay in accessing a cell, and thus improving the user experience.

Description

Communication method, device and system

[0001] This application claims priority to the Chinese patent application with application number 202410405571.7 filed with the State Intellectual Property Office of China on April 3, 2024, and priority to the Chinese patent application with the invention name “Communication Method, Device and System”, all 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, device, and system. Background Art

[0003] With the expansion of NR base station deployment range and the increase in user data traffic, the power consumption problem of base stations has become increasingly prominent. In order to save energy consumption of base stations, base stations can not send certain signals or reduce the frequency of signal transmission, such as not sending system information block 1 (SIB1). When the user equipment (UE) searches for the synchronization signal block (synchronization signal and PBCH block, SSB) and finds that SIB1 cannot be obtained, the UE will think that this cell is prohibited from access, resulting in the UE being unable to access, unable to meet service needs in a timely manner, and affecting the user experience. Summary of the Invention

[0004] The present application provides a communication method, apparatus and system, which can enable terminal equipment to access a cell in a timely manner to meet user needs.

[0005] In the first aspect, a communication method is provided, which can be applied to the terminal side, such as the terminal or the communication module in the terminal, or the circuit or chip responsible for the communication function in the terminal (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or system in package (SIP) chip containing a modem core). For the sake of convenience of description, the following is an example of execution of a terminal device.

[0006] The method includes: determining whether the first cell is prohibited from access based on the result of obtaining the system information block SIB1 of the first cell and the status of the first cell, the status of the first cell is not broadcasting the SIB1, and when the first cell is not prohibited from access, sending a first message, the first message is used to trigger the SIB1 of the first cell.

[0007] This method can lift the access restriction on the first cell in advance by standardizing the behavior of the terminal device after failing to obtain SIB1, enabling the terminal device to smoothly send the first message to trigger the SIB1 of the first cell, so that it can access or stay in the first cell in time to meet user needs in time.

[0008] In certain implementations, determining whether the first cell is prohibited from access based on a result of acquiring the SIB1 of the first cell and a status of the first cell includes:

[0009] The result of acquiring the SIB1 of the first cell is that the SIB1 of the first cell is not acquired, determining that the first cell is prohibited from access, acquiring from the second cell a status of the first cell that the SIB1 is not broadcast, and changing the prohibited access status of the first cell to non-prohibited access; or

[0010] The state of the first cell obtained from the second cell is that the SIB1 is not broadcast, and the result of obtaining the SIB1 of the first cell is that the SIB1 of the first cell is not obtained, and it is determined that the first cell is not prohibited from access; or

[0011] The state of the first cell obtained from the first cell is that the SIB1 is not broadcast, and the result of obtaining the SIB of the first cell is that the SIB1 of the first cell is not obtained, and it is determined that the first cell is not prohibited from access.

[0012] In this manner, the terminal device may determine whether access to the first cell is prohibited in a variety of ways, which facilitates the terminal device to determine the status of the first cell in a timely manner, thereby shortening the delay in the terminal device accessing the first cell.

[0013] In some implementations, the method further includes: receiving state information of the first cell, where the state information of the first cell indicates a state of the first cell.

[0014] In some implementations, obtaining the status information of the first cell includes: receiving a second message from the second cell, the second message including the status information of the first cell, or receiving a third message from the first cell, the third message including the status information of the first cell, and the third message is carried in the main system module MIB of the first cell.

[0015] In this manner, the first cell or the second cell directly indicates the status of the first cell to the terminal device, reducing the complexity of the terminal device acquiring the first cell.

[0016] In some implementations, the third message further includes frequency information and / or physical cell identifier PCI of the second cell.

[0017] In this manner, the third message directly indicates the information of the second cell to the terminal device, which facilitates the terminal device to quickly determine the second cell and further shortens the delay for the terminal device to access the first cell.

[0018] In certain implementations, the first message is a wake-up signal WUS, and the second message or the third message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following:

[0019] The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

[0020] In certain implementations, when the first cell is not barred from access, sending the first message includes:

[0021] The first cell is not prohibited from access, and the signal transmission quality of the first cell meets a first condition, sending a first message,

[0022] The first condition includes at least one of the following:

[0023] The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0024] In this method, the first message is sent only when the conditions are met, that is, when the signal transmission quality of the first cell meets the requirements of the terminal device, the terminal device triggers the access process, which can improve the reliability of signal transmission to provide stable service quality.

[0025] In some implementations, the method further includes receiving a fourth message, the fourth message indicating the first condition.

[0026] The fourth message may be sent by the first cell, may be sent by the second cell, or may be sent by the first cell and forwarded by the second cell, and there is no limitation on this.

[0027] In some implementations, the sending the first message includes: sending the first message to the first cell, where the first message is used to request the first cell to send the SIB1.

[0028] In some implementations, sending the first message includes: sending the first message to the second cell, the first message being used to instruct the second cell to assist the first cell in sending the SIB1, or the first message being used to trigger a fifth message of the second cell, the fifth message being used to instruct the first cell to send the SIB1.

[0029] In the above two implementations, the terminal device can directly trigger the SIB1 of the first cell, or trigger the SIB1 of the first cell through the second cell, which increases the flexibility of the terminal device in triggering SIB1.

[0030] In some implementations, the method further includes: receiving a response message from the first cell, where the response message from the first cell is a response to the first message, and the response message instructs the first cell to send the SIB1.

[0031] In some implementations, the response message includes scheduling information of SIB1 of the first cell, and the scheduling information includes time-frequency resource information of SIB1 of the first cell.

[0032] This approach eliminates the need for terminal devices to send SIB1 triggering messages multiple times. Alternatively, the response message can carry SIB1 scheduling information, allowing the terminal device to obtain SIB1 scheduling information and receive SIB1 without re-acquiring the MIB, thus saving overhead.

[0033] In some implementations, the method further includes: receiving a response message from the second cell, where the response message from the second cell indicates that the first cell sends the SIB1 or the second cell sends the SIB1 of the first cell.

[0034] In some implementations, the method further includes: determining whether to reside in or access the first cell according to the SIB1.

[0035] In some implementations, the method further includes: receiving a sixth message, the sixth message including status information of an intra-frequency reselection field, the status of the intra-frequency reselection field being not allowed; searching for a co-frequency cell of the first cell to determine a second cell, the second cell being a collaborative cell of the first cell.

[0036] In this way, the terminal device can ignore the meaning of the intra-frequency reselection field to determine the second cell, avoiding the inability to obtain the status and related configuration of the first cell, and further shortening the delay of the terminal device accessing the first cell.

[0037] In some implementations, the method is applicable to a terminal device, and the terminal device is in an idle state (IDLE) or an inactive state.

[0038] In the second aspect, a communication method is provided, which can be applied to the network side, such as a network device on the network side, or a module / component in the network device, such as a chip or circuit or chip system, and this application does not limit this. For ease of description, the following is an example of execution by the first cell (corresponding network device). In the following text, where information is sent and received by the first cell or the second cell, the first cell can be replaced by the network device or network device corresponding to the first cell, and the second cell can be replaced by the network device or network device corresponding to the second cell.

[0039] The method includes: sending a third message, the third message including status information of a first cell, the third message being carried in the MIB of the first cell, the status of the first cell being not broadcasting SIB1; receiving a first message, the first message being used to request the first cell to send the SIB1, or receiving a fifth message, the fifth message instructing the first cell to send the SIB1; and sending the SIB1 based on the first message.

[0040] In some implementations, the third message further includes frequency information and / or PCI of the second cell, where the second cell is a collaborative cell assisting the first cell.

[0041] In some implementations, the first message is a WUS, and the third message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following:

[0042] The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

[0043] In some implementations, the first message is a WUS, and the method further includes: sending the SIB1 according to the signal strength of the WUS.

[0044] In this manner, the first cell sends SIB1 based on the signal strength of the received WUS, which can improve the reliability of signal transmission between the first cell and the terminal device.

[0045] In some implementations, the method further includes sending a fourth message, where the fourth message indicates a first condition, where the first condition includes at least one of the following:

[0046] The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0047] It should be understood that the first cell may send the fourth message to the second cell, or may send the fourth message to the terminal device.

[0048] In some implementations, the method further includes: sending a response message, where the response message is a response to the first message, and the response message instructs the first cell to send the SIB1.

[0049] In some implementations, the response message includes scheduling information of the SIB1 of the first cell, and the scheduling information includes time domain resource information and / or frequency domain resource information of the SIB1 of the first cell.

[0050] In some implementations, the method further includes: sending a sixth message, where the sixth message includes status information of an intra-frequency reselection field, and the status of the intra-frequency reselection field is not allowed.

[0051] In a third aspect, a communication method is provided, which can be applied to a network side, such as a network device on the network side, or a module / component in the network device, which is not limited in this application. For ease of description, the following is an example of execution in the second cell (corresponding network device).

[0052] The method includes: sending a second message, the second message including status information of a first cell, the status of the first cell being not broadcasting SIB1; receiving a first message, the first message being used to instruct the second cell to assist the first cell in sending the SIB1, or the first message being used to trigger a fifth message of the second cell, the fifth message instructing the first cell to send the SIB1; sending the SIB1 based on the first message, or sending the fifth message.

[0053] In some implementations, the first message is a wake-up signal WUS, and the second message also includes WUS configuration information of the first cell, and the WUS configuration information includes at least one of the following: time domain resources for sending the WUS, frequency domain resources for sending the WUS, or characteristic parameters of the pseudo-random sequence used by the WUS.

[0054] In some implementations, the method further includes: sending a response message, where the response message instructs the terminal device to re-acquire the MIB of the first cell.

[0055] In some implementations, the method further includes: sending a fourth message, the fourth message indicating a first condition, the first condition including at least one of the following: the receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0056] It should be understood that the second and third aspects are implementation methods on the network device side corresponding to the first aspect. The explanation, supplement and description of the beneficial effects of the first aspect are also applicable to the second and third aspects and will not be repeated here.

[0057] In a fourth aspect, a communication device is provided, which has the function of implementing the above-mentioned first aspect. For example, the communication device includes a module or unit or means corresponding to the operation involved in the above-mentioned first aspect. The module or unit or means can be implemented by software, or by hardware, or by a combination of software and hardware.

[0058] In one possible implementation, the communication device includes a processing unit and a transceiver unit, the processing unit being used to determine whether the first cell is prohibited from access based on a result of obtaining the system information block SIB1 of the first cell and the status of the first cell, the status of the first cell being not broadcasting the SIB1, and when the first cell is not prohibited from access, the processing unit being used to send a first message, and the first message being used to trigger the SIB1 of the first cell.

[0059] In certain implementations, the processing unit determines, based on a result of acquiring the SIB1 of the first cell and a status of the first cell, whether the first cell is prohibited from access, including:

[0060] The processing unit is specifically configured to: determine that a result of acquiring the SIB1 of the first cell is that the SIB1 of the first cell is not acquired, determine that the first cell is prohibited from access, obtain from the second cell a status of the first cell that the SIB1 is not broadcast, and change the prohibited access of the first cell to non-prohibited access; or,

[0061] The processing unit is specifically configured to obtain from the second cell that the state of the first cell is not broadcasting the SIB1, and the result of obtaining the SIB1 of the first cell is that the SIB1 of the first cell is not obtained, and determine that the first cell is not prohibited from access; or

[0062] The processing unit is specifically configured to obtain from the first cell that the state of the first cell is not broadcasting the SIB1, and the result of obtaining the SIB of the first cell is that the SIB1 of the first cell is not obtained, and determine that the first cell is not prohibited from access.

[0063] In some implementations, the transceiver unit is further configured to receive state information of the first cell, where the state information of the first cell indicates a state of the first cell.

[0064] In some implementations, the transceiver unit is used to receive a second message from a second cell, where the second message includes status information of the first cell, or to receive a third message from a first cell, where the third message includes status information of the first cell, and the third message is carried in the main system module MIB of the first cell.

[0065] In some implementations, the third message further includes frequency information and / or physical cell identifier PCI of the second cell.

[0066] In certain implementations, the first message is a wake-up signal WUS, and the second message or the third message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following:

[0067] The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

[0068] In certain implementations, when the first cell is not prohibited from access, the transceiver unit is configured to receive and send the first message, including:

[0069] The first cell is not prohibited from access, and the signal transmission quality of the first cell meets a first condition, and the transceiver unit is used to receive and send a first message,

[0070] The first condition includes at least one of the following:

[0071] The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0072] In some implementations, the transceiver unit is further configured to receive a fourth message, where the fourth message indicates the first condition.

[0073] In some implementations, the sending the first message includes: sending the first message to the first cell, where the first message is used to request the first cell to send the SIB1.

[0074] In some implementations, the transceiver unit is used to send the first message, including the transceiver unit being used to send the first message to the second cell, the first message being used to instruct the second cell to assist the first cell in sending the SIB1, or the first message being used to trigger a fifth message of the second cell, the fifth message being used to instruct the first cell to send the SIB1.

[0075] In some implementations, the transceiver unit is further configured to receive a response message from the first cell, where the response message from the first cell is a response to the first message, and the response message instructs the first cell to send the SIB1.

[0076] In some implementations, the response message includes scheduling information of SIB1 of the first cell, and the scheduling information includes time-frequency resource information of SIB1 of the first cell.

[0077] In some implementations, the transceiver unit is further configured to receive a response message from the second cell, where the response message from the second cell instructs the first cell to send the SIB1 or the second cell to send the SIB1 of the first cell.

[0078] In some implementations, the processing unit is further configured to determine whether to reside in or access the first cell according to the SIB1.

[0079] In some implementations, the transceiver unit is also used to receive a sixth message, wherein the sixth message includes status information of the intra-frequency reselection field, and the status of the intra-frequency reselection field is not allowed; search for the same-frequency cell of the first cell to determine the second cell, and the second cell is a collaborative cell of the first cell.

[0080] In some implementations, the communication apparatus is a terminal device, and the terminal device is in an idle state (IDLE) or an inactive state.

[0081] In a fifth aspect, a communication device is provided, which has the function of implementing the above-mentioned first aspect. For example, the communication device includes a module or unit or means corresponding to the operation involved in the above-mentioned first aspect. The module or unit or means can be implemented by software, or by hardware, or by a combination of software and hardware.

[0082] In one possible implementation, the communication device includes a transceiver unit, which is used to send a third message, wherein the third message includes status information of a first cell, the third message is carried in the MIB of the first cell, and the status of the first cell is not broadcasting SIB1; the transceiver unit is also used to receive a first message, wherein the first message is used to request the first cell to send the SIB1, or to receive a fifth message, wherein the fifth message instructs the first cell to send the SIB1; the transceiver unit is also used to send the SIB1 based on the first message.

[0083] In some implementations, the third message further includes frequency information and / or PCI of the second cell, where the second cell is a collaborative cell assisting the first cell.

[0084] In some implementations, the first message is a WUS, and the third message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following:

[0085] The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

[0086] In some implementations, the first message is a WUS, and the transceiver unit is further configured to send the SIB1 according to the signal strength of the WUS.

[0087] In some implementations, the transceiver unit is further configured to send a fourth message, where the fourth message indicates a first condition, where the first condition includes at least one of the following:

[0088] The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0089] In some implementations, the transceiver unit is further configured to send a response message, where the response message is a response to the first message, and the response message instructs the first cell to send the SIB1.

[0090] In some implementations, the response message includes scheduling information of the SIB1 of the first cell, and the scheduling information includes time domain resource information and / or frequency domain resource information of the SIB1 of the first cell.

[0091] In some implementations, the transceiver unit is further configured to send a sixth message, where the sixth message includes status information of an intra-frequency reselection field, and the status of the intra-frequency reselection field is not allowed.

[0092] In the sixth aspect, a communication device is provided, including a transceiver unit, which is used to send a second message, the second message including status information of a first cell, the status of the first cell being not broadcasting SIB1; the transceiver unit is also used to receive a first message, the first message is used to instruct the second cell to assist the first cell in sending the SIB1, or the first message is used to trigger a fifth message of the second cell, the fifth message instructing the first cell to send the SIB1; the transceiver unit is used to send the SIB1 based on the first message, or to send the fifth message.

[0093] In some implementations, the first message is a wake-up signal WUS, and the second message also includes WUS configuration information of the first cell, and the WUS configuration information includes at least one of the following: time domain resources for sending the WUS, frequency domain resources for sending the WUS, or characteristic parameters of the pseudo-random sequence used by the WUS.

[0094] In some implementations, the transceiver unit is further configured to send a response message, wherein the response message instructs the terminal device to reacquire the MIB of the first cell.

[0095] In some implementations, the transceiver unit is also used to send a fourth message, where the fourth message indicates a first condition, and the first condition includes at least one of the following: the receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0096] It should be understood that the third aspect and the fourth aspect are implementation methods on the device side corresponding to the first aspect and the second aspect. The explanations, supplements and descriptions of the beneficial effects of the first aspect and the second aspect are also applicable to the third aspect and the fourth aspect and will not be repeated here.

[0097] In a seventh aspect, the present application provides a communication device, comprising an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver unit in the third aspect, and the processor is used to implement the function of the processing unit in the third aspect.

[0098] In an eighth aspect, the present application provides a communication device, comprising an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver unit in the fourth aspect, and the processor is used to implement the function of the processing unit in the fourth aspect.

[0099] In the ninth aspect, the present application provides a communication device, including an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver unit in the fifth aspect, and the processor is used to implement the function of the processing unit in the fourth aspect.

[0100] In the tenth aspect, the present application provides a computer-readable medium storing a program code for execution on a terminal device, the program code including instructions for executing the method of the first aspect, or any possible manner in the first aspect, or all possible manners in the first aspect.

[0101] In the eleventh aspect, an embodiment of the present application provides a computer-readable medium storing a program code for execution by a data acquisition device, the program code including instructions for executing the method of the second aspect, or any possible manner of the second aspect, or all possible manners of the second aspect.

[0102] In the twelfth aspect, an embodiment of the present application provides a computer-readable medium storing a program code for execution by a data acquisition device, the program code including instructions for executing the method of the third aspect, or any possible method of the third aspect, or all possible methods of the third aspect.

[0103] In the thirteenth aspect, a computer program product storing computer-readable instructions is provided, which, when the computer-readable instructions are executed on a computer, enables the computer to execute the method of the first aspect, or any possible method of the first aspect, or all possible methods of the first aspect.

[0104] In the fourteenth aspect, a computer program product storing computer-readable instructions is provided, which, when the computer-readable instructions are run on a computer, enables the computer to execute the method of the above-mentioned second aspect, or any possible method of the second aspect, or all possible methods of the second aspect.

[0105] In the fifteenth aspect, a computer program product storing computer-readable instructions is provided, which, when the computer-readable instructions are run on a computer, enables the computer to execute the method of the above-mentioned third aspect, or any possible method of the third aspect, or all possible methods of the third aspect.

[0106] In the sixteenth aspect, a communication system is provided, which includes a method for implementing the above-mentioned first aspect, or any possible manner in the first aspect, or all possible manners in the first aspect, the second aspect, or any possible manner in the second aspect, or all possible manners in the second aspect, or the third aspect, or any possible manner in the third aspect, or all possible manners in the third aspect, and a device with various possible designed functions.

[0107] In the seventeenth aspect, a processor is provided, which is coupled to a memory and is used to execute the method of the above-mentioned first aspect, or any possible manner of the first aspect, or all possible manners of the first aspect.

[0108] In the eighteenth aspect, a processor is provided, coupled to a memory, for executing the method of the second aspect, or any possible manner of the second aspect, or all possible manners of the second aspect.

[0109] In the nineteenth aspect, a processor is provided for coupling with a memory, for executing the method of the third aspect, or any possible manner of the third aspect, or all possible manners of the third aspect.

[0110] In a twentieth aspect, a chip system is provided, comprising a processor and a memory configured to execute computer programs or instructions stored in the memory, so that the chip system implements the method of any of the aforementioned first, second, or third aspects, as well as any possible implementation of any of the aspects. The chip system may be composed of a chip alone, or may include a chip and other discrete components.

[0111] In the twenty-first aspect, a communication method is provided, which includes: a network device corresponding to a first cell sends a third message, the third message includes status information of the first cell, the third message is carried in the MIB of the first cell, and the status of the first cell is not broadcasting SIB1, or the second cell sends a second message, the second message includes status information of the first cell, and the status of the first cell is not broadcasting SIB1; the terminal device determines whether the first cell is prohibited from access based on the result of obtaining the system information block SIB1 of the first cell and the status of the first cell, and the status of the first cell is not broadcasting the SIB1. When the first cell is not prohibited from access, the terminal device sends a first message, and the first message is used to trigger the second message. SIB1 of a cell; the network device corresponding to the first cell receives a first message, where the first message is used to request the first cell to send the SIB1, or the first cell receives a fifth message, where the fifth message instructs the first cell to send the SIB1; receives a first message, where the first message is used to instruct the second cell to assist the first cell in sending the SIB1, or the first message is used to trigger the fifth message of the second cell, where the fifth message instructs the first cell to send the SIB1; the network device corresponding to the second cell sends the SIB1 based on the first message, or sends the fifth message; the first cell sends the SIB1 based on the first message, or the second cell sends SIB1 based on the first cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0112] FIG1 is a schematic diagram of a possible application framework in a communication system.

[0113] FIG2 is a schematic diagram of a communication method proposed in this application.

[0114] FIG3 is a schematic diagram of an implementation flow of a communication method proposed in this application.

[0115] FIG4 is a schematic diagram of an implementation flow of a communication method proposed in this application.

[0116] FIG5 is a schematic diagram of an implementation flow of a communication method proposed in this application.

[0117] FIG6 is a schematic block diagram of a communication device.

[0118] FIG7 is a schematic block diagram of yet another communication device.

[0119] FIG8 is a schematic block diagram of yet another communication device. DETAILED DESCRIPTION

[0120] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0121] Figure 1 is a schematic diagram of several architectures 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 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The radio access network 100 may include at least one radio access network device (such as 110a and 110b in Figure 1 ) and at least one terminal (such as 120a-120j in Figure 1 ). The terminal is wirelessly connected to the radio access network device, and the radio access network device is wirelessly or wiredly connected to the core network. The core network device and the radio access network device may be independent and distinct physical devices, or the functions of the core network device and the logical functions of the radio access network device may be integrated into the same physical device, or a single physical device may integrate some of the functions of the core network device and some of the functions of the radio access network device. Terminals and radio access network devices may be connected to each other via wired or wireless connections. FIG1 is only a schematic diagram. The communication system may further include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG1 .

[0122] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, wireless local area networks (WLAN) systems, satellite communication systems, future communication systems, or integrated systems of multiple systems. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0123] A network element in a communication system can send a signal to another network element or receive a signal from another network element. The signal may include information, signaling, or data, etc. The network element can also be replaced by an entity, a network entity, a device, a communication device, a communication module, a node, a communication node, etc. The present disclosure uses the network element as an example for description. For example, the communication system may include at least one terminal device and at least one network device. The network device can send a downlink signal to the terminal device, and / or the terminal device can send an uplink signal to the network device. It is understandable that the terminal device in the present disclosure can be replaced by the first network element, and the network device can be replaced by the second network element, and the two perform the corresponding communication methods in the present disclosure.

[0124] In an embodiment of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0125] The terminal device may be a device that provides voice / data, such as a handheld device or vehicle-mounted device with a wireless connection function. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0126] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0127] In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, which can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the embodiments of the present application, only the terminal device is used as an example for description, and the embodiments of the present application are not limited to the solutions of the embodiments of the present application.

[0128] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station, secondary station, multi-standard radio (motor slide retainer, MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), radio unit (RU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device. The base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a device that performs the base station function in future communication systems, etc. The base station can support networks with the same or different access technologies. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.

[0129] Base stations can be fixed or mobile. For example, a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move based on the location of the mobile base station. In other examples, a helicopter or drone can be configured to act as a device that communicates with another base station.

[0130] 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.

[0131] 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.

[0132] In some deployments, the network devices mentioned in the embodiments of the present application may include a CU, a DU, or both a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)), a user plane CU node (central unit-user plane (CU-UP)), and a DU node. For example, the network devices may include a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU.

[0133] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes implementing portions of the base station's functionality. For example, a RAN node can be a CU, DU, CU-CP, CU-UP, or RU. The CU and DU can be separate or included in the same network element, such as the BBU. The RU can be included in a radio frequency device or radio unit, such as an RRU, AAU, or RRH.

[0134] The RAN node may support one or more types of fronthaul interfaces, with different fronthaul interfaces corresponding to DUs and RUs with different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and the RU is another type of interface, relative to the CPRI, some of the downlink and / or uplink baseband functions, such as precoding, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) for downlink, are moved from the DU to the RU for implementation; and for uplink, one or more of digital beamforming (BF), or fast Fourier transform (FFT) / cyclic prefix (CP) removal, are moved from the DU to the RU for implementation. In one possible implementation, the interface may be an enhanced common public radio interface (eCPRI). In the eCPRI architecture, the division between the DU and RU is different, corresponding to different types (category, Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0135] Taking eCPRI Cat A as an example, for downlink transmission, based on layer mapping, the DU is configured to implement layer mapping and one or more functions preceding it (i.e., one or more of coding, rate matching, scrambling, modulation, and layer mapping). Other functions after layer mapping (e.g., resource element (RE) mapping, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) addition) are moved to the RU for implementation. For uplink transmission, based on RE demapping, the DU is configured to implement demapping and one or more functions preceding it (i.e., one or more of decoding, rate matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and RE demapping). Other functions after demapping (e.g., one or more of digital BF or fast Fourier transform (FFT) / CP removal) are moved to the RU for implementation. It is understandable that for the functional description of DU and RU corresponding to various types of eCPRI, reference can be made to the eCPRI protocol, which will not be described in detail here.

[0136] In one possible design, the processing unit for implementing baseband functions in the BBU is called a baseband high layer (BBH) unit, and the processing unit for implementing baseband functions in the RRU / AAU / RRH is called a baseband low layer (BBL) unit.

[0137] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (open RAN, ORAN) system, CU may also be referred to as O-CU (open CU), DU may also be referred to as O-DU, CU-CP may also be referred to as O-CU-CP, CU-UP may also be referred to as O-CU-UP, and RU may also be referred to as O-RU. Any of the CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0138] In the embodiments of the present application, the device for implementing the functions of the network device can be a network device; it can also be a device that can support the network device to implement the functions, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the network device or used in conjunction with the network device. In the embodiments of the present application, only the device for implementing the functions of the network device is used as an example to illustrate, and does not constitute a limitation on the solutions of the embodiments of the present application.

[0139] The network device and / or terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface; it can also be deployed on aircraft, balloons and satellites in the air. The embodiments of this application do not limit the scenarios in which the network device and the terminal device are located. In addition, the terminal device and the network device can be hardware devices, or they can be software functions running on dedicated hardware, software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities including dedicated or general-purpose hardware devices and software functions. This application does not limit the specific forms of the terminal device and the network device.

[0140] The technical solutions provided in the embodiments of this application can be applied to wireless communications between communication devices. Wireless communications between communication devices may include: wireless communications between network devices and terminals, wireless communications between network devices, and wireless communications between terminal devices. In the embodiments of this application, the term "wireless communications" may also be referred to as "communication," which may also be described as "data transmission," "information transmission," or "transmission."

[0141] It can be understood that in the embodiments of the present application, the physical downlink shared channel (PDSCH) and the physical downlink control channel (PDCCH) are merely examples of downlink data channels and downlink control channels, respectively. In different systems and different scenarios, data channels and control channels may have different names, and the embodiments of the present application do not limit this.

[0142] With the expansion of NR base station deployments and the increase in user data traffic, the power consumption of base stations has become increasingly prominent. To save base station energy, base stations can choose not to send certain signals or reduce the frequency of sending certain signals. When the UE needs it, it can send a wake-up signal to wake up the base station to send the corresponding signal, meeting the UE's need to obtain relevant information and thus achieve the purpose of accessing the base station.

[0143] The concepts involved in this application are introduced below.

[0144] 1.SIB1

[0145] Remaining minimum system information (RMSI), also known as remaining minimum system information, is a signal continuously broadcast by the base station. It provides essential system information to cells, such as information related to cell access or cell selection. A UE searches for the frequency band of the SSB and, upon detecting the SSB signal, discovers the cell. Based on the master information block (MIB) information carried in the SSB, the UE can obtain the time-frequency resource information of the PDCCH that schedules SIB1. The UE can then blindly detect the PDCCH information based on this information. After obtaining the PDCCH information, the UE can obtain information related to the PDSCH carrying SIB1 scheduled on the PDCCH. Therefore, the UE can obtain SIB1 on the corresponding PDSCH, thereby obtaining the necessary system information. In current NR designs, SIB1 is broadcast periodically because the base station cannot predict when a UE will need to obtain SIB1. To ensure smooth UE access, SIB1 is configured for periodic broadcast. Therefore, SIB1 is a very important fundamental signal in the communication process between the base station and the UE.

[0146] In addition to SIB1, other system information is carried on other system message blocks. The current protocol can support on-demand transmission of other SIBs, that is, other SIBs can be broadcast periodically or aperiodically and the UE can request them on demand. The specific information of SIB1 indicates the broadcast status of other SIBs:

[0147] The format of the SIB broadcast status (si-BroadcastStatus) is an enumeration, which can represent one of the two types: broadcast or non-broadcast.

[0148] If broadcasting is used, si-Periodicity indicates the broadcast period, which is also an enumeration format. For example, the period value can be 8 radio frames or 16 radio frames. rf represents the radio frame. SIB-Mapping indicates the SIB type, which can be one or more of SIB2 to SIB14.

[0149] The MIB information includes:

[0150] SFN represents the system frame number, and the UE can perform time synchronization and frame time slot alignment based on the system frame number.

[0151] The subcarrier spacing indicates the common subcarrier spacing of the current SSB. The UE can use this subcarrier spacing to receive SIB1, Msg 2 / 4 and Msg B to achieve initial access, and can receive paging messages and broadcast system information.

[0152] The SSB subcarrier offset indicates the offset between the frequency domain position of the SSB and the frequency domain starting position of the entire system resource block.

[0153] pdcch-configSIB1 indicates the resource configuration of the PDCCH broadcast by SIB1. The PDCCH indicates the scheduling information of SIB1.

[0154] Cell barred indicates whether the cell is barred from access.

[0155] intraFreqReselection indicates whether intra-frequency reselection is allowed.

[0156] 2.SSB

[0157] NR supports two types of SSBs. One is the cell-defined SSB (CD-SSB), which carries the configuration information for the control resource set (CORESET#0) associated with SIB1 and the monitoring timing of the type 0 PDCCH common search space (CSS). The main function of CORESET#0 is to define the time and frequency resources of the Type 0 PDCCH CSS and the monitoring timing of the Type 0 PDCCH CSS. Based on the information in CORESET 0 and the Type 0 PDCCH CSS, the UE searches for the NR PDCCH that schedules the SIB1 NR PDSCH to facilitate demodulation and reception of SIB1, thereby obtaining the minimum system information required to access the wireless network system. The other type is the non-cell-defined SSB (NCD-SSB). It does not carry the configuration information for CORESET#0 associated with SIB1 and is primarily used for radio resource management (RRM). The UE can obtain RRM measurements to support UE mobility management by measuring the reference signals in the CD-SSB or NCD-SSB.

[0158] When a UE detects an SSB during cell search, it first needs to determine whether the SSB is a CD-SSB or a non-cell defined SSB (NCD-SSB). For example, the subcarrier offset k between the SSB and the common resource block grid is provided by the physical broadcast channel (PBCH) of the SSB. SSB Whether it is within the valid subcarrier offset value range is determined. SSB If the value of is within the valid subcarrier range, the SSB is CD-SSB, otherwise the SSB is NCD-SSB. When the carrier frequency belongs to the FR2 frequency range, k SSB The value is given by the 4-bit parameter ssb-SubcarrierOffset in the MIB. The valid subcarrier offset value range is 0 <= k SSB <=11. When the carrier frequency belongs to the FR1 frequency range, K SSB The value is given by a 5-bit number. The most significant bit of this 5-bit number is the PBCH payload parameter The remaining 4 bits are the MIB parameter ssb-SubcarrierOffset, and its valid subcarrier offset value range is 0 <= k SSB <=23.

[0159] For NCD-SSB, k SSB This will be used to provide information to help the UE to search for CD-SSB. To help the UE detect CD-SSB, an NCD-SSB may carry information about the frequency location of the CD-SSB. For example, if the UE detects an NCD-SSB in the frequency range FR1 and 24 <= k SSB <=29; or if the UE detects an NCD-SSB in the frequency range FR2 and 12<=k SSB <=13, the UE can determine the nearest CD-SSB frequency position based on the SIB1 parameter pdcch-ConfigSIB1. For example, if the k of NCD-SSB in the frequency range F1 is SSB =31, or k for NCD-SSB in frequency range FR2 SSB =15, and the bit values ​​of pdcch-ConfigSIB1 are not all 0, it means that there is no CD-SSB in a certain frequency range represented by the value of the SIB1 parameter pdcch-ConfigSIB1 with the frequency of NCD-SSB as the reference point; if the bit values ​​of pdcch-ConfigSIB1 are all 0, it means that the NCD-SSB does not carry information about the frequency position of the CD-SSB.

[0160] 3. Radio resource management (RRM) measurements

[0161] Mobility management is a key operation in wireless mobile communications. When the signal quality of a terminal's serving cell deteriorates to a certain level, it changes the terminal's serving cell through handover (connected state behavior) or cell selection / reselection (disconnected state behavior). This involves selecting a neighboring cell with better communication quality as the terminal's new serving cell to ensure that the communication link between the base station and the terminal is not interrupted due to the terminal's mobility.

[0162] RRM measurement allows a terminal to monitor the communication quality of its serving cell and / or neighboring cells (i.e., non-serving cells) in real time. The handover and cell selection / reselection involved in the aforementioned mobility management operations are based on RRM measurement results, making RRM measurement the foundation of mobility management.

[0163] Depending on the RRC state of the terminal, RRM measurements can be divided into connected state measurements and non-connected state (i.e., idle state / inactive state) measurements. Specifically, when the terminal is in idle state or inactive state, the base station can broadcast a measurement configuration. The terminal performs measurements based on the broadcast measurement configuration and uses the measurement results for operations such as cell selection / reselection without reporting the measurement results to the base station. When the terminal is in a connected state, the base station can configure the terminal to perform measurements based on the measurement configuration and report the measurement results. Based on the measurement results reported by the terminal, the base station can decide whether to initiate a handover for the terminal and change the serving cell for the terminal.

[0164] Based on the relationship between the measurement frequency and the serving cell frequency, RRM measurements can be divided into intra-frequency measurement, inter-frequency measurement, and inter-RAT measurement. Inter-system measurement refers to measurements on systems other than the 5G NR system (for example, measurements on 2G / 3G / 4G (LTE) systems). Intra-frequency measurement and inter-frequency measurement are intra-RAT measurements. Specifically:

[0165] For the measurement of the same frequency point (referred to as the same frequency measurement), the base station is configured with two quality thresholds: S IntraSearchP and S IntraSearchQ , where when the RSRP quality of the serving cell Srxlev> threshold S IntraSearchP , and the RSRQ quality Squal of the serving cell> threshold S IntraSearchQWhen , the terminal does not perform the same-frequency measurement; otherwise, it must perform the same-frequency measurement.

[0166] For the measurement of inter-frequency / inter-system (inter-RAT) frequencies, if the priority of the measurement frequency is higher than that of the serving cell frequency, the terminal will unconditionally start the measurement of the inter-frequency / inter-system (inter-RAT) frequency regardless of the signal quality of the serving cell; if the priority of the measurement frequency is lower than or equal to that of the serving cell frequency, the base station configures two quality thresholds: S nonIntraSearchP and S nonIntraSearchQ , where when the serving cell RSRP quality Srxlev> threshold S nonIntraSearchP , and the serving cell RSRQ quality Squal> threshold S nonIntraSearchQ When , the terminal does not perform the measurement of different frequencies / different system frequencies. Otherwise, it must perform the measurement of different frequencies / different system frequencies.

[0167] 1) Cell selection

[0168] If a terminal wants to obtain network services, it needs to select a cell in a public land mobile network (PLMN) to reside in. During the cell search process, many cells will be found. It is necessary to determine whether the current cell is suitable for residency based on the cell system information and terminal attributes. Cell level and signal quality are one of the evaluation criteria. Specifically, cell selection follows the S criterion, which is:

[0169] If a terminal wants to stay in a cell, the cell must meet the following conditions:

[0170] Srxlev>0 and Squal>0;

[0171] Srxlev=Q rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation –Qoffset temp ;

[0172] Squal=Q qualmeas –(Q qualmin +Q qualminoffset )–Qoffset temp .

[0173] in:

[0174] Srxlev is the cell selection RX level value (dB);

[0175] Squal is the cell selection quality value (dB);

[0176] Q rxlevmeas The measured cell RX level value (RSRP) is the actual cell reception level value (reference signal received power) measured by the terminal;

[0177] Q rxlevmin The minimum required RX level in the cell.

[0178] Q rxlevminoffset Q rxlevmin The offset of

[0179] P compensation is max(P EMAX –P PowerClass ,0),P EMAX P is the maximum TX power level a UE may use when transmitting on the uplink in the cell. PowerClass is the maximum output power determined according to the terminal power level, where P PowerClass is the transmission capability of the terminal itself, that is, the maximum output power determined by the terminal according to the power level, P EMAX The maximum output power allowed by the base station for the terminal;

[0180] Qoffset temp is a temporary offset (offset temporarily applied to a cell);

[0181] Q qualmeas is the measured cell signal quality value (reference signal received quality) (measured cell quality value (RSRQ));

[0182] Q qualmin is the minimum required quality level in the cell;

[0183] Q qualminoffset Q qualmin The offset of .

[0184] 2) Cell reselection

[0185] ① For reselection of neighboring cells on high-priority frequency points:

[0186] If the network configures threshServingLowQ, then:

[0187] Within a period of TreselectionRAT, the RSRQ quality of the neighboring cell satisfies Squal > Thresh x,highQ , and the residence duration of the terminal on the current serving cell exceeds 1 s, the terminal takes this neighboring cell as the target cell for reselection.

[0188] If the network does not configure threshServingLowQ, then:

[0189] Within a period of TreselectionRAT, the RSRP quality of the neighboring cell satisfies Srxlev > Thresh x,highP , and the residence duration of the terminal on the current serving cell exceeds 1 s, the terminal takes this neighboring cell as the target cell for reselection.

[0190] ② For reselection of co-frequency neighboring cells or neighboring cells of the same priority on different frequencies / different systems (inter-RAT):

[0191] If the neighboring cell has a better R value ranking than the serving cell, and within a period of TreselectionRAT, the R value of the neighboring cell is continuously better than that of the serving cell, and the residence duration of the terminal on the current serving cell exceeds ls, the terminal takes this neighboring cell as the target cell for reselection.

[0192] ③ For reselection of neighboring cells on low-priority frequency points:

[0193] If the network configures threshServingLowQ, then:

[0194] Within a period of TreselectionRAT, the RSRQ quality of the serving cell satisfies Squal < ThreshServing,LowQ, and the RSRQ quality of the neighboring cell on the low-priority frequency point satisfies Squal > Thresh x,lowQ , and the residence duration of the terminal on the current serving cell exceeds 1 s, it is considered that this neighboring cell is the target cell for reselection.

[0195] If the network does not configure threshServingLowQ, then:

[0196] Within a period of TreselectionRAT, if the RSRP quality of the serving cell satisfies Srxlev < ThreshServing,LowP, and the RSRP quality of the neighbor cell on the low-priority frequency band satisfies Srxlev > Thresh x,lowP , and the terminal has resided on the current serving cell for more than 1 s, it is considered that this neighbor cell is the target cell for reselection.

[0197] Currently, only after the UE has searched for the SSB does it know that there is a cell on this frequency band, and the UE can further find the configuration of the PDCCH scheduling SIB1 through the MIB in the SSB. By reading the configuration in the PDCCH, the UE can obtain the information of SIB1. Therefore, the MIB is very important for obtaining SIB1. When the UE cannot obtain SIB1 after searching for the SSB, the UE will consider this cell to be prohibited from access. If the cell is regarded as in the "prohibited" state because SIB1 cannot be obtained: The UE can exclude the prohibited cell from the candidate cells for cell selection / reselection for up to 300 seconds.

[0198] In addition, if the UE sees that the intraFreReselection field in the MIB is set to not allowed, when the UE is communicating on the authorized spectrum, the UE is prohibited from performing cell reselection on the same-frequency cells; when the UE is communicating on the unlicensed spectrum, the UE is not affected by the intraFreReselection field, and the UE can perform cell reselection on the same-frequency cells.

[0199] Once the UE cannot search for SIB1 or reselection is not allowed, the UE cannot access the cell, seriously affecting the user experience. In view of this, the present application proposes a communication method, which can enable the UE to access the cell in time to meet the service requirements.

[0200] It should be understood that the communication method of the present application can be applied between network devices and network devices, between terminal devices and terminal devices, and between network devices and terminal devices. Among them, the network device can be a network device, or a component in a network device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the network device. The terminal device can be a terminal device, or a component in a terminal device (for example, a processor, a chip, or a chip system, etc.), or a logic module or software that can realize all or part of the functions of the terminal device. The following is an example of the terminal device as the execution subject. In the following, where the first cell or the second cell is involved in the transmission and reception of information, the first cell can be replaced by the network device or network device in the first cell (or the network device or network device corresponding to the first cell), and the second cell can be replaced by the network device or network device in the second cell (or the network device or network device corresponding to the second cell).

[0201] The communication method is shown in FIG2 and includes the following steps:

[0202] S210, the terminal device determines whether the first cell is prohibited from access based on the result of obtaining the system information block SIB1 of the first cell and the status of the first cell, and the status of the first cell is not broadcasting SIB1.

[0203] In one possible manner, the first cell is a network energy saving cell (NES Cell), hereinafter also referred to as an energy saving cell. A network energy saving user equipment is also referred to as an energy saving user equipment, such as a NES UE.

[0204] The first cell may be in one of two states: one in which the cell broadcasts SIB1 normally, and the other in which the cell does not broadcast SIB1. There may be multiple cells that do not broadcast SIB1, and the first cell may belong to the multiple cells. The first cell may include one cell or multiple cells, which is not limited in this application.

[0205] The terminal device may obtain the state of the first cell by receiving state information of the first cell, where the state information of the first cell indicates the state of the first cell. Specifically, receiving the state information of the first cell is implemented as follows:

[0206] For example, the terminal device obtains the status information of the first cell from the first cell. For example, the first cell sends message A (i.e., an example of the third message), and the message A includes the status information of the first cell. In one possible implementation, the status information of the first cell is carried in the MIB of the first cell. In other words, the message A is carried in the MIB of the first cell. In other words, the first cell broadcasts the SSB normally, and has an enhanced design for the MIB. The MIB can indicate that the cell is a cell that does not broadcast SIB1.

[0207] One possible way is to use k SSB A value in the range not defined in FR1 indicates that the cell does not broadcast SSB. For example, a value in the range k for NCD-SSB in the frequency range FR1 is SSB =30, or k for NCD-SSB in the frequency range FR2 SSB =14, it means that the cell does not broadcast SIB1.

[0208] In another possible manner, other free fields in the MIB are used to indicate that the cell is a cell that does not broadcast SIB1.

[0209] Optionally, information A may also indicate the frequency and / or physical cell ID (PCI) of the collaborative cell, or the frequency information and / or PCI of the collaborative cell may be indicated through the SIB1 parameter pdcch-ConfigSIB1, so as to facilitate the terminal device to determine the collaborative cell.

[0210] In another example, the terminal device obtains the status information of the first cell from the second cell. The second cell is a cell with normal functions, for example, the second cell is a cell that broadcasts all signals normally. For example, the second cell is a collaborative cell (or auxiliary cell). For example, the second cell sends a message B (an example of a second message) to the terminal device, and correspondingly, the terminal device receives the message B. The message B includes the status information of the first cell. Specifically, the second cell broadcasts SSB and SIB1 normally, the first cell sends its status information to the second cell, and the second cell helps the first cell broadcast cell status information, and the status information does not broadcast SIB1 or other energy-saving descriptions. The terminal device searches for the second cell through blind search, and then obtains the cell status of the first cell from the system message of the second cell.

[0211] The second cell may be preset. The second cell may also be configured, for example, the terminal device is instructed to use cell A as a coordinated cell. The second cell may also be autonomously determined by the terminal device, for example, the terminal device determines the second cell through a cell search, such as by blindly searching other frequency points and finding the second cell, where the other frequency points are different from the frequency points of the first cell.

[0212] In a possible implementation, the terminal device determines the second cell through intra-frequency reselection. For example, the first cell sends a message C (an example of a sixth message) to the terminal device, where the message C includes status information of an intra-frequency reselection field (intraFreReselection).

[0213] When the status of the intra-frequency reselection field is allowed, the terminal device searches for the same-frequency cell as the first cell to determine the second cell.

[0214] When the status of the intra-frequency reselection field is not allowed, the terminal device can ignore this field, that is, search for the same-frequency cell of the first cell to determine the second cell. In this case, the terminal device is an energy-saving terminal (NES UE). In other words, the terminal device is a terminal device that supports on-demand SIB1 capability. Optionally, the terminal device is in an idle (IDLE) state or an inactive (inactive) state. It should be understood that when the execution subject is a terminal device, such as a component or module (such as a chip) of a terminal device, the terminal device corresponding to the component or module (or the terminal device where it is located) should be in an idle (IDLE) state or an inactive (inactive) state.

[0215] Search for cells on the same frequency as the first cell to determine a second cell, where the second cell is a secondary cell.

[0216] Here, the first cell sends message A, and the second cell sends message B. This means that the terminal device receives message B from the second cell, and the terminal device receives message A from the first cell. Alternatively, it can be said that the terminal device receives message B in the second cell and message A in the first cell. Alternatively, the network equipment (e.g., base station) in the first cell sends message A, and the network equipment (e.g., base station) in the second cell sends message B. In this article, whether the first cell sends a message or the second cell sends a message can be referred to the explanation here and will not be repeated here.

[0217] The results of the terminal device obtaining the system information block SIB1 of the first cell may be as follows:

[0218] Result 1: The terminal device determines to obtain the system information block SIB1 of the first cell based on the information of the MIB in the synchronization signal block of the first cell, and the result of obtaining the SIB1 of the first cell is obtained or not obtained. For example, the terminal device determines that the MIB is a conventional MIB (different from the enhanced MIB in this application, that is, the MIB does not contain information indicating the status of the first cell) based on the information of the MIB in the synchronization signal block of the first cell. The MIB indicates that the SSB is a CD-SSB and provides information about pdcch-ConfigSIB1. The terminal device obtains SIB1 based on this information.

[0219] Result 2: The terminal device determines not to obtain the SIB1 of the first cell based on the status information of the first cell, and the result of obtaining the SIB1 of the first cell is that it is not obtained.

[0220] Based on the state of the first cell and the result of obtaining the SIB1 of the first cell, the terminal device determines whether the first cell is prohibited from access. Specifically, the following implementation may be performed:

[0221] Implementation 1: The terminal device obtains the SIB1 of the first cell, fails to obtain the SIB1 of the first cell, and determines that access to the first cell is prohibited (or is prohibited from access). The terminal device then obtains the status of the first cell as not broadcasting SIB1, and changes the prohibited access to the first cell to not prohibited access.

[0222] For example, the result of obtaining the SIB1 of the first cell is that the SIB1 of the first cell is not obtained, it is determined that the first cell is prohibited from access, the status of the first cell obtained from the second cell is not broadcasting SIB1, and the prohibited access of the first cell is changed to non-prohibited access.

[0223] Implementation 2: The terminal device obtains that the status of the first cell is not broadcasting SIB1, and the result of obtaining the SIB1 of the first cell is that the SIB1 of the first cell is not searched, and it is determined that the first cell is not prohibited from access.

[0224] For example, the state of the first cell obtained from the second cell is that SIB1 is not broadcast, and the result of obtaining SIB1 of the first cell is that SIB1 of the first cell is not searched, so it is determined that the first cell is not prohibited from access.

[0225] Implementation 3: The terminal device obtains the status of the first cell as not broadcasting SIB1, no longer obtains SIB1 or cannot obtain SIB1, that is, the result of obtaining the SIB of the first cell is not obtaining the SIB1 of the first cell, and determines that the first cell is not prohibited from access.

[0226] For example, the state of the first cell is obtained from the first cell as not broadcasting SIB1, the SIB1 of the first cell is no longer obtained, and it is determined that the first cell is not prohibited from access.

[0227] S220, when the first cell is not prohibited from access, the terminal device sends a first message, and the first message is used to trigger SIB1 of the first cell.

[0228] The first message is used to request the first cell to send SIB1. Alternatively, the first message is used to activate the first cell to send SIB1. Alternatively, the first message is used to enable the first cell to send SIB1. Alternatively, the first message is used to trigger the first cell to send SIB1. This application does not limit the name of the first message function.

[0229] The first message may be a wake-up signal (WUS). The above-mentioned message A and / or message B may carry the WUS configuration information of the first cell, and the WUS configuration information includes at least one of the following: the time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS, such as the root sequence index. The terminal device sends the WUS to the first cell or the second cell according to the configuration information of the WUS. For example, the terminal device sends the WUS generated by the characteristic parameters of the pseudo-random sequence on the time domain resources and frequency domain resources indicated by the WUS configuration information.

[0230] It should be understood that the first cell can send WUS configuration information to the second cell, and the second cell then sends or forwards the WUS configuration information to the terminal device.

[0231] It should also be understood that the WUS configuration information may also be sent separately, for example, by carrying the WUS configuration information in other messages.

[0232] The first message may also be a request message. The terminal device may send the request message to the first cell or the second cell. For example, the request message may be carried on a physical uplink shared channel (PUSCH).

[0233] Specifically, there are several possible implementations:

[0234] A possible implementation 1: The terminal device sends a first message to the first cell, and correspondingly, the first cell receives the first message. The first message is WUS. The first cell receives the first message and sends SIB1. Optionally, the first cell may determine to send SIB1 to the terminal device based on the signal strength of the received WUS. For example, when the signal strength of the received WUS is greater than or equal to a first threshold, the first cell determines to send SIB1 to the terminal device. The first threshold may be predefined or preconfigured.

[0235] Possible implementation 2: The terminal device sends a first message to the first cell, and the first cell receives the first message accordingly. The first message is a request message, and the request message is used to request the first cell to send SIB1. For example, the terminal device sends an on-demand SIB1 request based on msg 3. That is, the terminal device can send an on-demand SIB1 request based on PUSCH. After receiving the request, the first cell sends SIB1 to the terminal device.

[0236] Optionally, in the above two possible implementations, the first cell may further send a response message to the terminal device, where the response message is used to confirm receipt of the WUS or on demand SIB1 request message, and / or the response message indicates that the first cell will (or will) send SIB1, or the response message indicates that the first cell sends SIB1. Or the response message indicates that the first cell does not send SIB1.

[0237] In one possible scenario, the indication of the time-frequency resources (ie, time domain resources and / or frequency domain resources) of the response message of the first cell may be indicated in a WUS configuration message or a new message.

[0238] This eliminates the need for the terminal device to send multiple on-demand SIB1 requests. Optionally, the first cell can include SIB1 scheduling information in its response message, allowing the terminal device to obtain SIB1 scheduling information and receive SIB1 without re-acquiring the MIB. This saves overhead and power consumption for the terminal device.

[0239] Possible implementation 3: The terminal device sends a wake-up signal to the second cell, and the second cell receives the wake-up signal. The second cell receives the wake-up signal and can assist the first cell in sending SIB1. For example, the second cell sends the SIB1 of the first cell to the terminal device.

[0240] Possible Implementation 4: The terminal device sends a wake-up signal to the second cell, and correspondingly, the second cell receives the wake-up signal. The wake-up signal triggers the second cell to instruct the first cell to send SIB1. That is, the second cell receives the wake-up signal and sends indication information A (an example of the fifth message) to the first cell, and the indication information A (an example of the fifth message) instructs the first cell to send SIB1. The first cell receives the indication information A and sends SIB1 to the terminal device.

[0241] Optionally, in the two possible implementations described above, the second cell may also send a response message to the terminal device, and the response message of the second cell instructs the terminal device to re-acquire the MIB of the first cell. Specifically, after the second cell instructs the first cell to send SIB1, the terminal device re-acquires the information in the MIB of the first cell. In other words, the response message of the second cell instructs the first cell to send SIB1 or the second cell to send the SIB1 of the first cell. Specifically, based on this indication message, the terminal device can obtain SIB1 on the second cell or obtain SIB1 on the first cell.

[0242] The following implementation is implemented when the first cell obtains SIB1:

[0243] A possible implementation is that after the first cell determines to broadcast SIB1, the first cell changes the SSB information to be sent, changes it to the state of SSB in non-energy-saving state, and the first cell sends SIB1. The first cell updates the state of SSB and falls back to the legacy SSB, that is, removes the relevant enhanced indication information, such as removing the indication of the state information that the first cell does not broadcast SIB1, and restores the pdcch-ConfigSIB1 field associated with SIB1 to the configuration information of CORESET#0 and the monitoring timing of Type0-PDCCH CSS. After receiving the response message or after sending the first message, the terminal device re-acquires the SSB of the first cell and re-acquires k SSB and / or configuration information of pdcch-ConfigSIB1 associated with SIB1, and then obtain scheduling information of SIB1 to obtain SIB1.

[0244] There is another possible implementation method, the above response message carries k SSB and / or the configuration information of pdcch-ConfigSIB1 associated with SIB1. After receiving the response message, the terminal device can directly search PDCCH according to the configuration information of pdcch-ConfigSIB1 to obtain SIB1.

[0245] There is another possible implementation method, which is to carry k in the WUS configuration information. SSB And / or the configuration information of pdcch-ConfigSIB1 associated with SIB1. After receiving the response message or after sending the first message, the terminal device can directly search PDCCH according to the configuration information of pdcch-ConfigSIB1 to obtain SIB1.

[0246] There is another possible implementation method, after the terminal device receives the response message or sends the first message, based on the k obtained when searching for SSB SSB and / or the configuration information of pdcch-ConfigSIB1 associated with SIB1, obtain the scheduling information of SIB1, and obtain SIB1. Specifically, the terminal device searches for SSB before receiving the response message. The terminal device obtains k SSB and / or the configuration information of pdcch-ConfigSIB1 associated with SIB1, the information may be stored, and SIB1 may be acquired based on the information after receiving the response message.

[0247] It should be understood that when the terminal device obtains SIB1 in the second cell, it directly obtains the SIB1 of the first cell from the system information of the second cell based on the configuration of the system information broadcast by the second cell, without having to re-search the SSB of the first cell.

[0248] Furthermore, before sending the first message, the terminal device may also determine whether the signal transmission quality of the first cell meets a condition. For example, when the first cell is not prohibited from access and the signal transmission quality of the first cell meets the first condition, the terminal device sends the first message.

[0249] The first condition includes at least one of the following:

[0250] The receiving power of the synchronization signal block SSB of the first cell is greater than the preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

[0251] The preset threshold value may be predefined or configured.

[0252] For example, the cell reselection conditions can be referred to the above description and will not be repeated here.

[0253] In one possible manner, the terminal device also obtains the first condition. For example, the terminal device receives message C (an example of the fourth message), which indicates the first condition. The message C can be sent by the first cell to the terminal device, or it can be sent by the second cell to the terminal device. For example, the first cell sends the first condition to the second cell, and the second cell forwards the first condition to the terminal device. Alternatively, the second cell assists the first cell in sending the first condition to the terminal device. This application does not limit this. The first condition can also be predefined or preconfigured.

[0254] Optionally, the auxiliary information broadcasted by the second cell in assisting the first cell may include some of the above information. For example, the auxiliary information broadcasted by the second cell in assisting the first cell may include the status information of the first cell, WUS configuration information, k SSB and / or one or more of the configuration information of pdcch-ConfigSIB1 associated with SIB1, the configuration of the response message (such as time domain resources and / or frequency domain resources), the first condition, and the like. In one possible implementation, the auxiliary information broadcast by the second cell in assistance to the first cell may be carried in the system information of the second cell.

[0255] It should be understood that the auxiliary information broadcast by the second cell to assist the first cell includes the status information of the first cell, WUS configuration information, k SSBAnd / or one or more of the configuration information of pdcch-ConfigSIB1 associated with SIB1, the configuration of the response message (such as time domain resources and / or frequency domain resources), the first condition and other information can be sent directly to the terminal device by the first cell, or sent to the terminal device by the second cell, or sent to the second cell by the first cell and forwarded by the second cell, or sent to the terminal device by the second cell.

[0256] S230, the terminal device determines whether to reside in or access the first cell according to SIB1.

[0257] This application modifies the behavior of the terminal device after failing to obtain SIB1, thereby enabling the terminal device to unblock the first cell in advance and successfully send a WUS or request message. In addition, the terminal device can search for cells on the same frequency, expanding the cell search range to reduce the delay in accessing the cell, thereby improving the user experience.

[0258] The various implementations described in this document may be independent solutions or may be combined according to internal logic, and these solutions all fall within the scope of protection of this application. For example, when the status of the intra-frequency reselection field is not allowed, the terminal device may ignore the field, that is, search for the same-frequency cell of the first cell to determine the second cell. As another example, the first cell broadcasts the SSB normally, and there is an enhanced design for the MIB. The MIB can indicate that the cell is a cell that does not broadcast SIB1, which can be implemented separately without being coupled with other implementations.

[0259] To facilitate understanding of the communication method of the present application, several implementation processes of the communication method provided by the present application are given below. UE is used as an example of a terminal device, NES Cell is used as an example of a first cell, and Cell A is used as an example of a second cell.

[0260] Implementation 1: The UE first searches for the NES Cell and then searches for the assisting cell Cell A. The NES Cell does not send SIB1, while Cell A is a normal cell that broadcasts SIB1 normally. Cell A also helps the NES Cell broadcast its cell status information.

[0261] Specifically, for implementation 1, as shown in FIG3 , the implementation includes the following process:

[0262] S310: The NES Cell sends an SSB to the UE, and correspondingly, the UE receives the SSB.

[0263] That is, the NES Cell broadcasts SSB normally. This SSB is legacy SSB.

[0264] S320: The UE searches for the SSB of the NES Cell, but cannot obtain the SIB1 of the NES Cell.

[0265] The UE determines that the cell is barred and cannot access the cell, and sets the cell status to barred, which can last up to 300 seconds.

[0266] S330, Cell A sends SSB and SIB1 to the UE, and correspondingly, the UE receives the SSB and SIB1.

[0267] Cell A can assist NES Cell in broadcasting system messages, such as assisting NES Cell in broadcasting status information, WUS configuration information, etc. For details, please refer to the description in S220 and will not be repeated here.

[0268] The UE searches for Cell A through a blind search and obtains the NES cell status and WUS configuration information from Cell A's system message. The UE changes the NES cell status to preemptively unbar the barred state of the NES cell. For example, if the UE determines that the NES cell is not barred, it changes the barred state to non-barred, triggering SIB1 as needed.

[0269] S340: The UE determines that a triggering condition for WUS is met.

[0270] For example, the triggering condition of WUS can refer to the description of the first condition in S220 and will not be repeated here.

[0271] S350: The UE sends a WUS to the NES Cell, and correspondingly, the NES Cell receives the WUS.

[0272] It should be understood that in this implementation, the UE sending a WUS to the NES Cell is used as an example of the first message. The UE may also send a request message to the NES Cell, or send a WUS or request message to Cell A. For details, please refer to the description of S220.

[0273] The UE generates a WUS based on the WUS configuration information in S330 (such as characteristic parameters of the pseudo-random sequence indicated by the WUS configuration information, such as a root sequence index), and sends the WUS to the NES Cell based on the WUS configuration information (such as on the time-frequency resources indicated by the WUS configuration information).

[0274] S360: The NES Cell sends SIB1 to the UE, and correspondingly, the UE receives the SIB1.

[0275] Optionally, after receiving the WUS, the NES cell determines whether to send the SIB1 based on the signal strength of the received WUS. That is, the NES cell may also determine whether to send the SIB1 based on the first condition.

[0276] S370: The UE selects to reside in or access an NES cell according to SIB1.

[0277] In this implementation, the UE behavior is modified after obtaining the cell status of the NES Cell so that the UE believes that the NES Cell is not barred. Therefore, the barred status of the NES Cell can be lifted in advance to implement on-demand SIB1, meeting the UE's needs of staying in or accessing the NES Cell.

[0278] Implementation 2: The UE may ignore the intraFreReselection field in the MIB of the SSB in the NES Cell and search for the same-frequency cell as the first cell to determine the second cell.

[0279] Specifically, implementation 2, as shown in FIG4 , includes the following steps:

[0280] S410: The NES Cell sends an SSB to the UE, and correspondingly, the UE receives the SSB.

[0281] That is, the NES Cell broadcasts the SSB normally. This SSB is the legacy SSB or the enhanced SSB described above (for example, an SSB including the MIB indicating the NES Cell status).

[0282] S420: The UE searches for the SSB of the NES Cell, but cannot obtain the SIB1 of the NES Cell.

[0283] The UE obtains the contents of the MIB in the SSB. For example, if the intraFreReselection field in the MIB indicates "not allowed," the UE cannot search for other intra-frequency cells. However, the UE can ignore the "not allowed" indication. It should be understood that the UE is an NES UE or supports on-demand SIB1. In other words, the intraFreReselection field in the MIB is invalid for NES UEs.

[0284] S430, Cell A sends SSB and SIB1 to the UE, and correspondingly, the UE receives the SSB and SIB1.

[0285] That is, the UE blindly searches for the SSB of Cell A and obtains the SIB1 of Cell A, thereby learning the cell status of the NES Cell and the configuration information of the WUS.

[0286] Optionally, the steps after S430 may refer to the steps after S330, or may refer to the description in S210-S230.

[0287] This implementation enables the UE to search on the same frequency cell, expand the cell search range, and promptly determine the coordinated cell (i.e., Cell A), saving the delay in accessing the cell.

[0288] Implementation 3: The MIB of the SSB in the NES cell is enhanced to indicate that the cell is a SIB1-less cell (i.e., does not broadcast SIB1).

[0289] Specifically, implementation 3, as shown in FIG5 , includes the following steps:

[0290] S510: The NES Cell sends an SSB to the UE, and correspondingly, the UE receives the SSB.

[0291] NES Cell broadcasts SSB normally, and enhances MIB. MIB can indicate that this cell is a cell that does not broadcast SIB1.

[0292] S520: The UE searches for the SSB of the NES Cell, but cannot obtain the SIB1 of the NES Cell.

[0293] The UE determines that the cell is barred and cannot access the cell, and sets the cell status to barred, which can last up to 300 seconds.

[0294] S530, Cell A sends SSB and SIB1 to the UE, and correspondingly, the UE receives the SSB and SIB1.

[0295] Cell A can assist NES Cell in broadcasting system messages, such as assisting NES Cell in broadcasting status information, WUS configuration information, etc. For details, please refer to the description in S220 and will not be repeated here.

[0296] The UE searches for Cell A through a blind search and obtains the NES cell status and WUS configuration information from Cell A's system message. The UE changes the NES cell status to preemptively unbar the barred state of the NES cell. For example, if the UE determines that the NES cell is not barred, it changes the barred state to non-barred, triggering SIB1 as needed.

[0297] S540: The UE determines that a triggering condition for WUS is met.

[0298] For example, the triggering condition of WUS can refer to the description of the first condition in S220 and will not be repeated here.

[0299] S550: The UE sends a WUS to the NES Cell, and correspondingly, the NES Cell receives the WUS.

[0300] It should be understood that in this implementation, the UE sending a WUS to the NES Cell is taken as an example. The UE may also send a request message to the NES Cell, or send a WUS or a request message to Cell A. For details, please refer to the description of S220.

[0301] The UE generates a WUS based on the WUS configuration information in S330 (such as characteristic parameters of the pseudo-random sequence indicated by the WUS configuration information, such as a root sequence index), and sends the WUS to the NES Cell based on the WUS configuration information (such as on the time-frequency resources indicated by the WUS configuration information).

[0302] Optionally, in S560 , the NES Cell sends a response message to the UE, and correspondingly, the UE receives the response message.

[0303] The response message indicates that the NES Cell confirms receipt of the WUS and further indicates that the NES Cell will send SIB1, so that the UE does not need to send on-demand SIB1 requests multiple times. Specifically, the response message can refer to the description in S220 and will not be repeated here.

[0304] S570 , the NES Cell sends the SSB and SIB1 to the UE, and correspondingly, the UE receives the SSB and SIB1.

[0305] After the NES Cell determines to broadcast SIB1, it can change the SSB information sent, such as changing to the SSB state in the non-energy-saving state or falling back to the legacy SSB, that is, removing the related enhanced indication information. For details, please refer to the description in S220 and will not be repeated here.

[0306] S580: The UE selects to reside in or access an NES cell according to SIB1.

[0307] That is, the UE re-acquires the SSB of the NES Cell and obtains the scheduling information of SIB1. After receiving the information of SIB1, the UE chooses to reside on or access the NES Cell.

[0308] This implementation enhances the MIB, allowing the NES Cell to directly indicate the cell status to the UE. The UE can access or reside on the cell after reacquiring the SIB1 information, thus avoiding the problem of the UE being unable to access or reside on the cell in a timely manner.

[0309] In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of interaction between various devices. In order to implement the various functions in the methods provided in the embodiments of the present application, the network device or terminal device may include a hardware structure and / or a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a function of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0310] The division of modules in the embodiments of the present application is illustrative and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the various embodiments of the present application may be integrated into a single processor, or may exist physically separately, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or software functional modules.

[0311] Similar to the above concept, as shown in FIG6 , an embodiment of the present application further provides an apparatus 600 for implementing the functions of a terminal device or network device in the above method. For example, the apparatus may be a software module or a chip system. In the embodiment of the present application, the chip system may be composed of a chip or may include a chip and other discrete components. The apparatus 600 may include: a processing unit 610 and a communication unit 620.

[0312] In an embodiment of the present application, the communication unit may also be referred to as a transceiver unit, and may include a sending unit and / or a receiving unit, which are respectively used to execute the sending and receiving steps of the network device (such as the network device in the first cell or the second cell) or the terminal device in the above method embodiment.

[0313] The communication device provided in the embodiment of the present application is described in detail below with reference to Figures 6 to 8. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment. Therefore, for matters not described in detail, reference can be made to the method embodiment above. For the sake of brevity, they will not be repeated here.

[0314] The communication unit 620 may also be referred to as a transceiver, transceiver, or transceiver device. The processing unit may also be referred to as a processor, processing board, processing module, or processing device. Optionally, the device in the communication unit 620 that implements the receiving function may be considered a receiving unit, and the device in the communication unit 620 that implements the transmitting function may be considered a transmitting unit. That is, the communication unit 620 includes both a receiving unit and a transmitting unit. A communication unit may also be referred to as a transceiver, transceiver, or interface circuit. A receiving unit may also be referred to as a receiver, receiver, or receiving circuit. A transmitting unit may also be referred to as a transmitter, transmitter, or transmitting circuit.

[0315] When the communication device 600 performs the functions of the terminal device (or UE) in the processes shown in FIG. 2 to FIG. 5 in the above embodiments:

[0316] The communication unit 620 is used for sending and receiving information, such as sending a first message, receiving a second message, receiving a third message, etc.

[0317] The processing unit is configured to determine whether the first cell is prohibited from access according to a result of acquiring the system information block SIB1 of the first cell and a state of the first cell.

[0318] When the communication device 600 performs the function of the network device (or the first cell such as NES Cell, the second cell such as Cell A) in any of the processes shown in FIG. 2 to FIG. 5 in the above embodiments:

[0319] The processing unit is used to determine the second message, the third message, the fourth message, SIB1, etc.

[0320] The communication unit is used to send and receive information. For example, it is used to receive a first message and send a second message, a third message, a fourth message, etc.

[0321] The above are just examples. The processing unit 610 and the communication unit 620 can also perform other functions. For more detailed descriptions, please refer to the method embodiments shown in Figures 2 to 5 or the relevant descriptions in other method embodiments, which are not repeated here.

[0322] As another possible product form, the transmitting device and receiving device described in the embodiment of the present application can be implemented by a general bus architecture. For ease of explanation, refer to Figure 7, which is a structural diagram of a communication device 700 provided in an embodiment of the present application, and the communication device 700 includes a processor 701 and a transceiver 702. The communication device 700 can be a terminal device, or a chip or chip system therein; or, the communication device 700 can be a network device in the first cell, or a chip or module therein; or, the communication device 700 can be a network device in the second cell, or a chip or module therein. Figure 7 only shows the main components of the communication device 700. In addition to the processor 701 and the transceiver 702, the communication device 700 can further include a memory 703, and an input and output device (not shown in the figure).

[0323] Optionally, processor 701 is primarily used to process communication protocols and communication data, as well as control the entire communication device, execute software programs, and process software program data. Memory 703 is primarily used to store software programs and data. Transceiver 702 may include a radio frequency circuit and an antenna. The radio frequency circuit is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.

[0324] Optionally, the processor 701 , the transceiver 702 , and the memory 703 may be connected via a communication bus.

[0325] When the communication device is powered on, the processor 701 can read the software program in the memory 703, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 701 performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 701. The processor 701 converts the baseband signal into data and processes the data.

[0326] In another implementation, the RF circuit and antenna may be provided independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be remotely arranged independent of the communication device.

[0327] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the above-mentioned communication device 600 may take the form of the communication device 700 shown in FIG. 7 .

[0328] As an example, the functions / implementation process of the processing unit 620 in FIG6 can be implemented by the processor 701 in the communication device 700 shown in FIG7 calling the computer-executable instructions stored in the memory 703. The functions / implementation process of the communication unit 620 in FIG6 can be implemented by the transceiver 702 in the communication device 700 shown in FIG7.

[0329] As another possible product form, the terminal device or network device in the present application may adopt the structure shown in Figure 8, or include the components shown in Figure 8. Figure 8 is a schematic diagram of the structure of a communication device 800 provided in the present application.

[0330] As shown in Figure 8, a communication device 800 includes a processor 801. Optionally, the communication device further includes a communication interface 802. It should be understood that a communication device may include multiple processors.

[0331] When the program instructions are executed in the at least one processor 801, the apparatus 800 can implement the method provided in any of the aforementioned embodiments and any possible designs thereof. Alternatively, the processor 801 implements the method provided in any of the aforementioned embodiments and any possible designs thereof through logic circuits or by executing code instructions.

[0332] The communication interface 802 may be used to receive program instructions and transmit them to the processor. Alternatively, the communication interface 802 may be used for communication between the communication device 800 and other communication devices, such as exchanging control signaling and / or service data. Exemplarily, the communication interface 802 may be used to receive signals from devices other than the communication device 800 and transmit them to the processor 801, or to send signals from the processor 801 to communication devices other than the communication device 800.

[0333] Optionally, the communication interface 802 may be a code and / or data read and write interface circuit, or the communication interface 802 may be a signal transmission interface circuit between a communication processor and a transceiver, or a pin of a chip.

[0334] Optionally, the communication device 800 may further include a memory 803, which may be used to store required program instructions and / or data. It should be noted that the memory 803 may exist independently of the processor 801 or may be integrated with the processor 801. The memory 803 may be located within the communication device 800 or external to the communication device 800, without limitation. It should be understood that a communication device may include multiple memories.

[0335] Optionally, the communication device 800 may further include a power supply circuit 804, which may be used to supply power to the processor 801. The power supply circuit 804 may be located in the same chip as the processor 801, or in another chip other than the chip where the processor 801 is located.

[0336] Optionally, the communication device 800 may further include a bus 808 , and various parts of the communication device 800 may be interconnected via the bus 803 .

[0337] In some embodiments, in terms of hardware implementation, those skilled in the art may conceive that the communication device 700 shown in FIG. 7 may take the form of the communication device 800 shown in FIG. 8 .

[0338] As an example, the functions / implementation process of the processing unit 620 in FIG6 can be implemented by the processor 801 in the communication device 800 shown in FIG8 calling the computer-executable instructions stored in the memory 803. The functions / implementation process of the communication unit 620 in FIG6 can be implemented by the communication interface 802 in the communication device 800 shown in FIG8.

[0339] It should be noted that the structure shown in FIG8 does not constitute a specific limitation on the transmitting device and the receiving device. For example, in other embodiments of the present application, the transmitting device and the second terminal device may include more or fewer components than shown, or may combine or separate certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0340] When the communication device is a chip used in a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device; or the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device.

[0341] When the communication device is a chip used in a network device, the network device chip implements the network device functions of the above method embodiments. The network device chip receives information from other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the terminal device to the network device; or the network device chip sends information to other modules in the network device (such as a radio frequency module or antenna), and the information is sent by the network device to the terminal device.

[0342] 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.

[0343] In the embodiments of the present application, the processor can be a random access memory (RAM), a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a 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. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal device. Of course, the processor and the storage medium can also exist in a network device or a terminal device as discrete components.

[0344] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) that contain computer-usable program code.

[0345] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or box in the flow chart and / or block diagram, as well as the combination of the flow chart and / or box in the flow chart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flow charts and / or one or more boxes in the block diagram.

[0346] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0347] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

[0348] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: include: determining whether access to the first cell is prohibited according to a result of acquiring a system information block SIB1 of the first cell and a state of the first cell, where the state of the first cell is that the SIB1 is not broadcast; When the first cell is not prohibited from access, a first message is sent, where the first message is used to trigger SIB1 of the first cell.

2. The method according to claim 1, characterized in that The determining whether the first cell is prohibited from access according to a result of acquiring the SIB1 of the first cell and a status of the first cell includes: The result of acquiring the SIB1 of the first cell is that the SIB1 of the first cell is not acquired, determining that the first cell is prohibited from access, acquiring from the second cell a status of the first cell that the SIB1 is not broadcast, and changing the prohibited access status of the first cell to non-prohibited access; or The state of the first cell obtained from the second cell is that the SIB1 is not broadcast, and the result of obtaining the SIB1 of the first cell is that the SIB1 of the first cell is not obtained, and it is determined that the first cell is not prohibited from access; or The state of the first cell obtained from the first cell is that the SIB1 is not broadcast, and the result of obtaining the SIB of the first cell is that the SIB1 of the first cell is not obtained, and it is determined that the first cell is not prohibited from access.

3. The method according to claim 1 or 2, characterized in that The method further comprises: State information of the first cell is received, where the state information of the first cell indicates a state of the first cell.

4. The method according to claim 3, characterized in that Acquiring the status information of the first cell includes: receiving a second message from a second cell, where the second message includes state information of the first cell, or A third message of the first cell is received, where the third message includes status information of the first cell, and the third message is carried in the main system module MIB of the first cell.

5. The method according to claim 4, characterized in that The third message also includes frequency information and / or physical cell identifier PCI of the second cell.

6. The method according to claim 4 or 5, characterized in that The first message is a wake-up signal WUS, and the second message or the third message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following: The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

7. The method according to any one of claims 1 to 6, characterized in that The sending of the first message when the first cell is not prohibited from access includes: The first cell is not prohibited from access, and the signal transmission quality of the first cell meets a first condition, sending a first message, The first condition includes at least one of the following: The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

8. The method according to claim 7, characterized in that The method further comprises: A fourth message is received, the fourth message indicating the first condition.

9. The method according to any one of claims 1 to 8, characterized in that The sending of the first message includes: The first message is sent to the first cell, where the first message is used to request the first cell to send the SIB1.

10. The method according to any one of claims 1 to 8, characterized in that The sending of the first message includes: The first message is sent to the second cell, where the first message is used to instruct the second cell to assist the first cell in sending the SIB1, or the first message is used to trigger a fifth message of the second cell, where the fifth message instructs the first cell to send the SIB1.

11. The method according to any one of claims 1 to 10, characterized in that The method further comprises: A response message from the first cell is received, where the response message from the first cell is a response to the first message, and the response message instructs the first cell to send the SIB1.

12. The method according to claim 11, characterized in that The response message includes scheduling information of SIB1 of the first cell, and the scheduling information includes time-frequency resource information of SIB1 of the first cell.

13. The method according to any one of claims 1 to 10, characterized in that The method further comprises: A response message of the second cell is received, where the response message of the second cell indicates that the first cell sends the SIB1 or the second cell sends the SIB1 of the first cell.

14. The method according to any one of claims 1 to 13, characterized in that The method further comprises: Determine whether to reside in or access the first cell according to the SIB1.

15. The method according to any one of claims 1 to 14, characterized in that The method further comprises: receiving a sixth message, the sixth message including status information of an intra-frequency reselection field, where the status of the intra-frequency reselection field is not allowed; Search for cells on the same frequency as the first cell to determine a second cell, where the second cell is a coordinated cell of the first cell.

16. The method according to claim 15, characterized in that The method is applicable to a terminal device, and the terminal device is in an idle state IDLE or an inactive state.

17. A communication method, characterized in that: include: Sending a third message, where the third message includes status information of the first cell, the third message is carried in the MIB of the first cell, and the status of the first cell is not broadcasting SIB1; receiving a first message, where the first message is used to request the first cell to send the SIB1, or receiving a fifth message, where the fifth message instructs the first cell to send the SIB1; The SIB1 is sent based on the first message.

18. The method according to claim 17, characterized in that The third message also includes frequency information and / or PCI of the second cell, and the second cell is a coordinated cell of the first cell.

19. The method according to claim 17 or 18, characterized in that The first message is a WUS, and the third message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following: The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

20. The method according to any one of claims 17 to 19, characterized in that The first message is a WUS, and the method further includes: The SIB1 is sent according to the signal strength of the WUS.

21. The method according to any one of claims 17 to 20, characterized in that The method further comprises: Send a fourth message, where the fourth message indicates a first condition, where the first condition includes at least one of the following: The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

22. The method according to any one of claims 17 to 21, characterized in that The method further comprises: Send a response message, where the response message is a response to the first message, and the response message instructs the first cell to send the SIB1.

23. The method according to claim 22, characterized in that The response message includes scheduling information of the SIB1 of the first cell, and the scheduling information includes time domain resource information and / or frequency domain resource information of the SIB1 of the first cell.

24. The method according to any one of claims 17 to 23, characterized in that The method further comprises: A sixth message is sent, where the sixth message includes status information of an intra-frequency reselection field, and the status of the intra-frequency reselection field is not allowed.

25. A communication method, characterized in that: include: Sending a second message, where the second message includes status information of the first cell, where the status of the first cell is not broadcasting SIB1; receiving a first message, where the first message is used to instruct the second cell to assist the first cell in sending the SIB1, or the first message is used to trigger a fifth message of the second cell, where the fifth message instructs the first cell to send the SIB1; The SIB1 is sent based on the first message, or the fifth message is sent.

26. The method according to claim 25, characterized in that The first message is a wake-up signal WUS, and the second message further includes WUS configuration information of the first cell, where the WUS configuration information includes at least one of the following: The time domain resources for sending the WUS, the frequency domain resources for sending the WUS, or the characteristic parameters of the pseudo-random sequence used by the WUS.

27. The method according to claim 26, characterized in that The method further comprises: A response message is sent, where the response message instructs the terminal device to reacquire the MIB of the first cell.

28. The method according to any one of claims 25 to 27, characterized in that The method further comprises: Send a fourth message, where the fourth message indicates a first condition, where the first condition includes at least one of the following: The receiving power of the synchronization signal block SSB of the first cell is greater than a preset threshold value, or the receiving power of the SSB of the first cell is the largest in at least one cell, or the receiving power of the SSB of the first cell meets the cell reselection condition.

29. A communication device, characterized in that: The method comprises modules or units for performing the method according to any one of claims 1 to 28.

30. A computer program product, characterized in that The computer program product comprises a computer program or instructions for performing the method according to any one of claims 1 to 28.

31. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instructions, and when the computer program or instructions are executed on a communication device, the communication device is caused to perform the method according to any one of claims 1 to 28.

32. A communication device, characterized in that: The method comprises an interface circuit and a processor, wherein the interface circuit and the processor are coupled to implement the method according to any one of claims 1 to 28.

33. A communication system, characterized in that: include: An apparatus for implementing the method according to any one of claims 1 to 16, and / or an apparatus for implementing the method according to any one of claims 17 to 24, and / or an apparatus for implementing the method according to any one of claims 25 to 28.

34. A processor, characterized in that: coupled to the memory, and configured to execute the method according to any one of claims 1 to 28.

35. A chip system, characterized in that: The chip system comprises a processor configured to execute a computer program or instruction stored in a memory, so that the chip system implements the method as claimed in any one of claims 1 to 28.

36. A communication method, characterized in that: include: The network device corresponding to the first cell sends a third message, where the third message includes status information of the first cell and is carried in the MIB of the first cell. The status of the first cell is not broadcasting SIB1. Alternatively, the second cell sends a second message, where the second message includes status information of the first cell and the status of the first cell is not broadcasting SIB1. The terminal device determines whether the first cell is prohibited from access based on a result of obtaining the system information block SIB1 of the first cell and the status of the first cell, where the status of the first cell is not broadcasting the SIB1. When the first cell is not prohibited from access, the terminal device sends a first message, where the first message is used to trigger the SIB1 of the first cell; the network device corresponding to the first cell receives the first message, where the first message is used to request the first cell to send the SIB1, or the first cell receives a fifth message, where the fifth message instructs the first cell to send the SIB1; A first message is received, where the first message is used to instruct the second cell to assist the first cell in sending the SIB1, or the first message is used to trigger a fifth message of the second cell, where the fifth message instructs the first cell to send the SIB1; the network device corresponding to the second cell sends the SIB1 based on the first message, or sends the fifth message; the first cell sends the SIB1 based on the first message, or the second cell sends SIB1 based on the first cell.

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