A communication method and apparatus

Abstract

Embodiments of the present application disclose a communication method and apparatus, which can be applied to a wireless communication system, such as a New Radio (NR) system. The method according to the embodiments of the present application can be executed by a terminal device, or can be executed by components of the terminal device (such as a processor, a chip, or a chip system, etc.). The method includes: obtaining an Inactive Radio Network Temporary Identity (I-RNTI); generating first target information and second target information according to the I-RNTI, and monitoring a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information. It can avoid malicious acquisition of the Downlink Control Information (DCI) of this terminal device on the PDCCH by other terminal devices, and improve the security and reliability of downlink data transmission.

Description

[0001] This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on March 19, 2020, with the application number 202010198842.8 and the invention title "A Communication Method and Device", the entire content of which is incorporated herein by reference. Technical Field

[0002] Embodiments of this application relate to the field of communications, and in particular, to a communication method and device. Background Art

[0003] In a wireless communication system such as a new radio (NR) system, the state of a user equipment (UE) may include a connected state, an idle state, and an inactive state.

[0004] For a UE in the connected state, the base station assigns a cell-radio network temporary identifier (C-RNTI) that is valid in the cell served by the current base station. The UE uses the C-RNTI for unicast data transmission, thereby ensuring the communication security and reliability between the UE and the base station. However, a UE in the inactive state does not have a C-RNTI, but only an inactive-radio network temporary identifier (I-RNTI).

[0005] With the development of wireless communication technologies, in addition to receiving one or more of paging messages, synchronization signals, broadcast messages, or system information from the base station, a UE in the inactive state may also perform unicast data transmission with the base station. However, a UE in the inactive state lacks a UE physical layer identifier. If a UE in the inactive state performs unicast data transmission with the base station, the communication security and reliability between the UE and the base station cannot be guaranteed. For example, other UEs may obtain the scheduling information of this UE and perform incorrect actions, or malicious UEs may eavesdrop on the unicast data sent or received by this UE. Summary of the Invention

[0006] Embodiments of this application provide a communication method and device, which can improve the security and reliability of uplink or downlink data transmission.

[0007] In a first aspect of the embodiments of the present application, a communication method is provided. This method can be executed by a terminal device or by components of the terminal device (such as a processor, a chip, or a chip system, etc.). The method includes: obtaining an Inactive Radio Network Temporary Identity (I-RNTI); generating first target information and second target information based on the I-RNTI; and monitoring a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

[0008] In the embodiments of the present application, generating first target information and second target information based on the I-RNTI and monitoring the PDCCH according to the first target information and the second target information can prevent the Downlink Control Information (DCI) of this terminal device on the PDCCH from being maliciously obtained by other terminal devices, improving the security and reliability of downlink data transmission.

[0009] Optionally, in a possible implementation manner of the first aspect, the first target information in the above steps is used to descramble the Cyclic Redundancy Check (CRC) information of the Downlink Control Information (DCI), and the second target information is used to obtain the search space of the PDCCH. The DCI is carried on the PDCCH.

[0010] In this possible implementation manner, by means of the first and second target information, the blind detection range of the PDCCH is reduced, and thus the power consumption of the terminal device can be reduced.

[0011] Optionally, in a possible implementation manner of the first aspect, the first target information in the above steps is used to descramble the Cyclic Redundancy Check (CRC) information of the Downlink Control Information (DCI), and the second target information is used to descramble the PDCCH. The DCI is carried on the PDCCH.

[0012] In this possible implementation manner, by means of the first and second target information, other terminal devices can be prevented from maliciously receiving the DCI of this terminal device, improving the security and reliability of downlink data transmission.

[0013] Optionally, in a possible implementation manner of the first aspect, the first target information in the above steps is used to descramble the PDCCH, and the second target information is used to obtain the search space of the PDCCH.

[0014] In this possible implementation manner, by means of the first and second target information, other terminal devices can be prevented from maliciously receiving the DCI of this terminal device, improving the security and reliability of downlink data transmission.

[0015] Optionally, in a possible implementation manner of the first aspect, the above steps further include: generating third target information according to the I-RNTI, where the first target information is used to obtain the search space of the PDCCH, the second target information is used to descramble the PDCCH, and the third target information is used to descramble the cyclic redundancy check (CRC) information of the downlink control information (DCI), and the DCI is carried on the PDCCH.

[0016] In this possible implementation manner, by means of the first, second, and third target information, other terminal devices can be prevented from maliciously receiving the DCI of this terminal device, improving the security and reliability of downlink data transmission.

[0017] Optionally, in a possible implementation manner of the first aspect, the above steps further include: generating fourth target information according to the I-RNTI; scrambling the physical uplink shared channel (PUSCH) or the physical uplink control channel (PUCCH) according to the fourth target information.

[0018] In this possible implementation manner, by means of the fourth target information, the security and reliability of uplink data transmission between the terminal device in the non-connected state and the network device can be improved.

[0019] Optionally, in a possible implementation manner of the first aspect, the above steps further include: generating fifth target information according to the I-RNTI; descrambling the physical downlink shared channel (PDSCH) according to the fifth target information.

[0020] In this possible implementation manner, descrambling the PDSCH by means of the fifth target information can prevent other terminal devices from receiving the downlink data of this terminal device, improving the security and reliability of downlink data transmission.

[0021] Optionally, in a possible implementation manner of the first aspect, the above steps further include: obtaining a target identifier. Generating the first target information and the second target information according to the I-RNTI includes: generating the first target information and the second target information according to the I-RNTI and the target identifier.

[0022] In this possible implementation manner, by generating the first target information and the second target information according to the I-RNTI and the target identifier, the probability of repetition of the target information of different terminals is reduced.

[0023] Optionally, in a possible implementation manner of the first aspect, the target identifier in the above steps includes at least one of the international mobile subscriber identity (IMSI) and the base station identifier.

[0024] In this possible implementation manner, by generating the first target information by using the IMSI and / or the base station identifier, the probability of repetition of the target information of different terminals can be avoided by using the exclusive IMSI, thereby improving the security of the target information.

[0025] Optionally, in a possible implementation of the first aspect, the I-RNTI in the above steps includes a first field and a second field, where the first field indicates information related to the terminal, and the second field indicates information related to the network device.

[0026] In this possible implementation, since the first field indicates information related to the terminal, that is, the target information is related to the terminal, the target information generated by each terminal is mostly different in most cases. Therefore, the target information used by each terminal device to monitor the PDCCH is different, which can prevent other terminal devices from receiving the downlink data of this terminal device, improving the security and reliability of downlink data transmission.

[0027] Optionally, in a possible implementation of the first aspect, the I-RNTI in the above steps further includes a third field, and this third field indicates information related to the Public Land Mobile Network (PLMN) and / or the operator.

[0028] In this possible implementation, adding information related to the PLMN and / or the operator reduces the probability of repetition of the target information of different terminals.

[0029] Optionally, in a possible implementation of the first aspect, generating the first target information and the second target information according to the I-RNTI in the above steps includes: generating the first target information and the second target information according to the third field.

[0030] In this possible implementation, by generating the first target information and the second target information according to the third field in the I-RNTI, the time taken to obtain or process the second field and the first field can be reduced, which is beneficial to reducing the latency and improving the efficiency of generating the target information.

[0031] Optionally, in a possible implementation of the first aspect, generating the first target information and the second target information according to the I-RNTI in the above steps includes: generating the first target information and the second target information according to the first field or the second field.

[0032] In this possible implementation, by generating the first target information and the second target information according to the first field or the second field in the I-RNTI, the time taken to obtain or process the second field or the first field can be reduced, which is beneficial to reducing the latency and improving the efficiency of generating the target information.

[0033] A second aspect of the embodiments of the present application provides a communication method. This method can be executed by a network device or by components of the network device (such as a processor, a chip, or a chip system, etc.). The method includes: obtaining an Inactive Radio Network Temporary Identity (I-RNTI); generating first target information and second target information according to the I-RNTI; and sending Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

[0034] In the embodiments of the present application, generating the first target information and the second target information according to the I-RNTI and sending DCI of the terminal device on the PDCCH according to the first target information and the second target information can prevent the DCI of the terminal device on the PDCCH from being obtained by other terminal devices, improving the security and reliability of downlink data transmission.

[0035] Optionally, in a possible implementation manner of the second aspect, the first target information in the above steps is used to scramble the Cyclic Redundancy Check (CRC) information of the Downlink Control Information (DCI), and the second target information is used to obtain the search space of the PDCCH.

[0036] In this possible implementation manner, by using the first and second target information to send DCI in the search space, the blind detection range of the PDCCH by the terminal device can be reduced, thereby reducing the power consumption of the terminal device.

[0037] Optionally, in a possible implementation manner of the second aspect, the first target information in the above steps is used to scramble the Cyclic Redundancy Check (CRC) information of the Downlink Control Information (DCI), and the second target information is used to scramble the PDCCH.

[0038] In this possible implementation manner, by using the first and second target information, other terminal devices can be prevented from maliciously receiving the DCI sent by the network device to a specific terminal device, improving the security and reliability of downlink data transmission.

[0039] Optionally, in a possible implementation manner of the second aspect, the first target information in the above steps is used to scramble the PDCCH, and the second target information is used to obtain the search space of the PDCCH.

[0040] In this possible implementation manner, by using the first and second target information, other terminal devices can be prevented from maliciously receiving the DCI sent by the network device to a specific terminal device, improving the security and reliability of downlink data transmission.

[0041] Optionally, in a possible implementation of the second aspect, the above steps further include: The network device generates third target information according to the I-RNTI. The first target information is used to obtain the search space of the PDCCH, the second target information is used to scramble the PDCCH, and the third target information is used to scramble the cyclic redundancy check (CRC) information of the downlink control information (DCI).

[0042] In this possible implementation, by means of the first, second, and third target information, it is possible to prevent other terminal devices from maliciously receiving the DCI sent by the network device to a specific terminal device, improving the security and reliability of downlink data transmission.

[0043] Optionally, in a possible implementation of the second aspect, the above steps further include: generating fourth target information according to the I-RNTI; descrambling the physical uplink shared channel (PUSCH) or the physical uplink control channel (PUCCH) according to the fourth target information.

[0044] In this possible implementation, by means of the fourth target information, it is possible to improve the security and reliability of uplink data transmission between the network device and a terminal device in the non-connected state.

[0045] Optionally, in a possible implementation of the second aspect, the above steps further include: generating fifth target information according to the I-RNTI; scrambling the physical downlink shared channel (PDSCH) according to the fifth target information.

[0046] In this possible implementation, scrambling the PDSCH by means of the fifth target information can prevent other terminal devices from receiving the downlink data sent by the network device to a specific terminal device, improving the security and reliability of downlink data transmission.

[0047] Optionally, in a possible implementation of the second aspect, the above steps further include: obtaining a target identifier. Generating the first target information and the second target information according to the I-RNTI includes: generating the first target information and the second target information according to the I-RNTI and the target identifier.

[0048] In this possible implementation, by generating the first target information and the second target information according to the I-RNTI and the target identifier, the probability of repetition of the target information of different terminals is reduced.

[0049] Optionally, in a possible implementation of the second aspect, the target identifier in the above steps includes at least one of the international mobile subscriber identification number (IMSI) and the base station identifier.

[0050] In this possible implementation, by using the IMSI and / or the base station identifier to generate the first target information, the probability of the target information of different terminals being repeated can be avoided by using the exclusive IMSI, thereby enhancing the security of the target information.

[0051] Optionally, in a possible implementation of the second aspect, the I-RNTI in the above steps includes a first field and a second field. The first field indicates information related to the terminal, and the second field indicates information related to the network device.

[0052] In this possible implementation, since the first field indicates information related to the terminal, that is, the target information is related to the terminal, the target information generated by each terminal is mostly different in most cases. Therefore, the network device sends DCI to different terminal devices according to different target information, which can prevent other terminal devices from receiving the downlink data sent by the network device to a specific terminal device, and enhances the security and reliability of downlink data transmission.

[0053] Optionally, in a possible implementation of the first aspect, the I-RNTI in the above steps further includes a third field, and the third field indicates information related to the Public Land Mobile Network (PLMN) and / or the operator.

[0054] In this possible implementation, adding information related to the PLMN and / or the operator reduces the probability of the target information of different terminals being repeated.

[0055] Optionally, in a possible implementation of the first aspect, generating the first target information and the second target information according to the I-RNTI in the above steps includes: generating the first target information and the second target information according to the third field.

[0056] In this possible implementation, by generating the first target information and the second target information according to the third field in the I-RNTI, the time taken to obtain or process the second field and the first field can be reduced, which is beneficial to reducing latency and improving the efficiency of generating target information.

[0057] Optionally, in a possible implementation of the second aspect, generating the first target information and the second target information according to the I-RNTI in the above steps includes: generating the first target information and the second target information according to the first field or the second field.

[0058] In this possible implementation, by generating the first target information and the second target information according to the first field or the second field in the I-RNTI, the DCI of this terminal device on the PDCCH can be prevented from being maliciously obtained by other terminal devices, and the security and reliability of downlink data transmission are enhanced.

[0059] A third aspect of the present application provides a communication device, which may be a terminal device or a component of a terminal device (such as a processor, a chip, or a chip system). The communication device includes:

[0060] An acquisition unit, configured to acquire an Inactive Radio Network Temporary Identity (I-RNTI);

[0061] A generation unit, configured to generate first target information and second target information according to the I-RNTI;

[0062] A monitoring unit, configured to monitor a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

[0063] Optionally, in a possible implementation manner of the third aspect, the first target information is used to descramble the Cyclic Redundancy Check (CRC) information of Downlink Control Information (DCI), and the second target information is used to obtain the search space of the PDCCH, and the DCI is carried on the PDCCH.

[0064] Optionally, in a possible implementation manner of the third aspect, the first target information is used to descramble the CRC information of the DCI, and the second target information is used to descramble the PDCCH, and the DCI is carried on the PDCCH.

[0065] Optionally, in a possible implementation manner of the third aspect, the first target information is used to descramble the PDCCH, and the second target information is used to obtain the search space of the PDCCH.

[0066] Optionally, in a possible implementation manner of the third aspect, the generation unit is further configured to generate third target information according to the I-RNTI. The first target information is used to obtain the search space of the PDCCH, the second target information is used to descramble the PDCCH, and the third target information is used to descramble the CRC information of the DCI, and the DCI is carried on the PDCCH.

[0067] Optionally, in a possible implementation manner of the third aspect, the generation unit is further configured to generate fourth target information according to the I-RNTI. The terminal device further includes a scrambling unit, configured to scramble a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) according to the fourth target information.

[0068] Optionally, in a possible implementation manner of the third aspect, the generation unit is further configured to generate fifth target information according to the I-RNTI. The terminal device further includes a descrambling unit, configured to descramble a Physical Downlink Shared Channel (PDSCH) according to the fifth target information.

[0069] Optionally, in a possible implementation of the third aspect, the obtaining unit is further configured to obtain a target identifier. The generating unit is specifically configured to generate first target information and second target information according to the I-RNTI and the target identifier.

[0070] Optionally, in a possible implementation of the third aspect, the target identifier includes at least one of an International Mobile Subscriber Identity (IMSI) and a base station identifier.

[0071] Optionally, in a possible implementation of the third aspect, the I-RNTI includes a first field and a second field. The first field indicates information related to the terminal, and the second field indicates information related to the network device.

[0072] Optionally, in a possible implementation of the third aspect, the I-RNTI further includes a third field, and the third field indicates information related to a Public Land Mobile Network (PLMN) and / or an operator.

[0073] Optionally, in a possible implementation of the third aspect, the generating unit is specifically configured to generate the first target information and the second target information according to the third field.

[0074] Optionally, in a possible implementation of the third aspect, the generating unit is specifically configured to generate the first target information and the second target information according to the first field or the second field.

[0075] A fourth aspect of the present application provides a communication device, which may be a network device or a component of a network device (such as a processor, a chip, or a chip system). The communication device includes:

[0076] An obtaining unit, configured to obtain an Inactive Radio Network Temporary Identity (I-RNTI);

[0077] A generating unit, configured to generate first target information and second target information according to the I-RNTI;

[0078] A sending unit, configured to send Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

[0079] Optionally, in a possible implementation of the fourth aspect, the first target information is used to scramble the Cyclic Redundancy Check (CRC) information of the DCI, and the second target information is used to obtain a search space of the PDCCH.

[0080] Optionally, in a possible implementation of the fourth aspect, the first target information is used to scramble the CRC information of the DCI, and the second target information is used to scramble the PDCCH.

[0081] Optionally, in a possible implementation of the fourth aspect, the first target information is used to scramble the PDCCH, and the second target information is used to obtain the search space of the PDCCH.

[0082] Optionally, in a possible implementation of the fourth aspect, the generating unit is further configured to generate third target information according to the I-RNTI. The first target information is used to obtain the search space of the PDCCH, the second target information is used to scramble the PDCCH, and the third target information is used to scramble the cyclic redundancy check (CRC) information of the downlink control information (DCI).

[0083] Optionally, in a possible implementation of the fourth aspect, the generating unit is further configured to generate fourth target information according to the I-RNTI. The network device further includes: a descrambling unit, configured to descramble the physical uplink shared channel (PUSCH) or the physical uplink control channel (PUCCH) according to the fourth target information.

[0084] Optionally, in a possible implementation of the fourth aspect, the generating unit is further configured to generate fifth target information according to the I-RNTI. The network device further includes: a scrambling unit, configured to scramble the physical downlink shared channel (PDSCH) according to the fifth target information.

[0085] Optionally, in a possible implementation of the fourth aspect, the obtaining unit is further configured to obtain the international mobile subscriber identity (IMSI). The generating unit is specifically configured to generate the first target information and the second target information according to the I-RNTI and the IMSI.

[0086] Optionally, in a possible implementation of the fourth aspect, the I-RNTI includes a first field and a second field. The first field indicates information related to the terminal, and the second field indicates information related to the network device.

[0087] Optionally, in a possible implementation of the fourth aspect, the I-RNTI further includes a third field, and the third field indicates information related to the public land mobile network (PLMN).

[0088] Optionally, in a possible implementation of the fourth aspect, the generating unit is specifically configured to generate the first target information and the second target information according to the first field or the second field.

[0089] In a fifth aspect of the embodiments of the present application, a communication device is provided. The communication device may be a terminal device, or may be a component of the terminal device (such as a processor, a chip, or a chip system). The communication device executes the method in the foregoing first aspect or any possible implementation of the first aspect.

[0090] The sixth aspect of the embodiments of the present application provides a communication device, which may be a network device or a component of a network device (such as a processor, a chip, or a chip system). The communication device executes the method in the second aspect or any possible implementation manner of the second aspect described above.

[0091] The seventh aspect of the present application provides a computer-readable medium, on which a computer program or instruction is stored. When the computer program or instruction runs on a computer, it causes the computer to execute the method in the first aspect or any possible implementation manner of the first aspect described above, or causes the computer to execute the method in the second aspect or any possible implementation manner of the second aspect described above.

[0092] The eighth aspect of the present application provides a communication device, including: a processor, the processor is coupled to a memory, and the memory is used to store a program or instruction. When the program or instruction is executed by the processor, the device implements the method in the first aspect or any possible implementation manner of the first aspect described above.

[0093] The ninth aspect of the present application provides a communication device, including: a processor, the processor is coupled to a memory, and the memory is used to store a program or instruction. When the program or instruction is executed by the processor, the device implements the method in the second aspect or any possible implementation manner of the second aspect described above.

[0094] Wherein, for the technical effects brought by the third, fifth, seventh, eighth aspects or any possible implementation manner among them, reference may be made to the technical effects brought by the first aspect or different possible implementation manners of the first aspect, which will not be elaborated here.

[0095] Wherein, for the technical effects brought by the fourth, sixth, seventh, ninth aspects or any possible implementation manner among them, reference may be made to the technical effects brought by the second aspect or different possible implementation manners of the second aspect, which will not be elaborated here. Description of the Drawings

[0096] Figure 1 It is a schematic diagram of a communication system in the embodiments of the present application;

[0097] Figures 2 - 4 It is a schematic flowchart of several communication methods in the embodiments of the present application;

[0098] Figures 5a - 9 It is several schematic diagrams of generating target information in the embodiments of the present application;

[0099] Figures 10 - 15 It is several schematic structural diagrams of the communication device in the embodiments of the present application. Detailed Embodiments

[0100] Embodiments of the present application provide a communication method and apparatus, which are used to improve the security and reliability of transmitted data.

[0101] The implementation principle, specific implementation manner, and corresponding beneficial effects of the technical solution of the present application will be described in detail below with reference to the respective drawings.

[0102] The present application can be applied to the protocol frameworks of various wireless communication systems. The wireless communication systems may include, but are not limited to, long term evolution (LTE) systems, New Radio (NR) systems, future evolved communication systems, etc. Future evolved communication systems such as future networks or sixth generation communication systems, etc.

[0103] Figure 1 A schematic diagram of a communication system is given. The communication system may include a network device 101 and terminal devices 102 to 104 that can communicate with the network device 101.

[0104] Figure 1 In, only one network device 101 and three terminal devices 102 to 104 are taken as examples for illustrative purposes. In practical applications, the communication system in the embodiments of the present application may have more network devices 101 and terminal devices, and the terminal devices may also be one or more. The embodiments of the present application do not limit the number of network devices 101 and terminal devices.

[0105] In the embodiments of the present application, the network device is a device deployed in the radio access network to provide wireless communication functions for terminal devices. The network device may include various forms of base stations: macro base stations, micro base stations (also called small stations), relay stations, access points, etc. In systems adopting different radio access technologies, the name of the network device may be different. For example, eNB or eNodeB (Evolutional NodeB) in LTE (Long Term Evolution). The network device may also be a radio controller in a CRAN (Cloud Radio Access Network) scenario. The network device may also be a base station device in a 5G network or a network device in a future evolved network. The network device may also be a wearable device or a vehicle-mounted device. The network device may also be a transmission and reception point (TRP). The network device may also generally refer to the general term of all devices at the network end. For example, when multiple TRPs are used to transmit data to terminal devices, the multiple TRPs are collectively referred to as the network device.

[0106] In the embodiments of the present application, the terminal device is a device with wireless transceiver functions, which can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable terminal device, and so on. The embodiments of the present application do not limit the application scenarios. The terminal device can sometimes also be referred to as a terminal, a user equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile device, a remote station, a remote terminal device, a mobile device, a UE agent, or a UE device, etc. The terminal device can also be fixed or mobile.

[0107] The embodiments of the present application are only schematically described by taking the network device as a base station and the terminal device as a UE as an example:

[0108] In a communication system (such as an NR system), the UE can be in a radio resource control connected (RRC-connected) state, a radio resource control idle (RRC-idle) state, or a radio resource control inactive (RRC-inactive) state.

[0109] When the UE is in the RRC-connected state, there is a connection between the UE and the base station. At this time, the base station knows that the UE is within the coverage area of this base station or within the management scope of this base station. For example, the base station knows that the UE is within the coverage area of the cell managed by this base station. The core network knows within the coverage area or management scope of which base station the UE is, and the core network knows through which base station the UE can be located or found. The base station and the UE can perform the transmission of data channels and / or control channels, so that the unicast information of the UE can be transmitted. For example, the base station can send a physical downlink control channel (PDCCH) and / or a physical downlink shared channel (PDSCH) to the UE. Another example is that the UE can send a physical uplink shared channel (PUSCH) and / or a physical uplink control channel (PUCCH) to the base station.

[0110] When the UE is in the RRC-idle state, there is no connection between the UE and the base station. At this time, the base station does not know whether the UE is within the coverage area of this base station or within the management scope of this base station. For example, the base station does not know whether the UE is within the coverage area of the cell managed by this base station. The core network does not know within the coverage area or management scope of which base station the UE is, and the core network does not know through which base station the UE can be located or found. The UE can receive one or more of paging messages, synchronization signals, broadcast messages, or system information from the base station. At this time, the UE cannot perform unicast data transmission with the base station.

[0111] When the UE is in the RRC-inactive state, there is no connection between the UE and the base station. At this time, the base station does not know whether the UE is within the coverage area of this base station or within the management scope of this base station. For example, the base station does not know whether the UE is within the coverage area of the cell managed by this base station. The core network knows within the coverage area or management scope of which base station the UE is, and the core network knows through which base station the UE can be located or found. The UE can receive one or more of paging messages, synchronization signals, broadcast messages, or system information from the base station.

[0112] With the development of wireless communication technology, in addition to receiving one or more of paging messages, synchronization signals, broadcast messages, or system information from the base station, a UE in the RRC-inactive state may also perform unicast data transmission with the base station. However, a UE in the RRC-inactive state lacks the identifier of the UE physical layer. If a UE in the RRC-inactive state performs unicast data transmission with the base station, the communication security and reliability between the UE and the base station cannot be guaranteed. For example, other UEs may obtain the scheduling information of this UE and perform incorrect actions, or a malicious UE may eavesdrop on the unicast data sent or received by this UE.

[0113] For a UE in the RRC-connected state, the base station assigns a cell-radio network temporary identifier (C-RNTI) that is valid in the cell served by the current base station. The UE uses the C-RNTI for unicast data transmission, thereby ensuring the communication security and reliability between the UE and the base station. However, a UE in the RRC-inactive state does not have a C-RNTI, but only an inactive-radio network temporary identifier (I-RNTI).

[0114] An embodiment of this application proposes a method for performing unicast data transmission using the I-RNTI, which ensures the security and reliability of communication data between the UE and the base station when there is no C-RNTI.

[0115] In the embodiments of this application, only the case where the network device is a base station and the terminal device is a UE is used for illustrative purposes. The following combines Figure 1 the communication system to describe the communication method in the embodiments of this application.

[0116] Please refer to Figure 2 , an embodiment provided by the embodiments of this application includes: steps 201 to 206.

[0117] In step 201, the network device obtains the I-RNTI.

[0118] The I-RNTI in the embodiments of this application may include a field, and this field is related to at least one of the UE, the base station, and the operator identifier, etc. Of course, the I-RNTI may include a first field and a second field. Among them, the first field is related to the UE. For example, the first field is a specific number or identifier of the UE (such as UE specific reference). The second device is related to the base station. For example, the second field is the number or identifier of the base station (gNB ID).

[0119] The I-RNTI may further include a third field. In the embodiments of the present application, the third field may be related to a public land mobile network (PLMN) or may be an operator identifier. It can be understood that in practical applications, the third field may also be other identifiers or other types. For example, the third field includes a type identifier of the UE, and the third field is not limited here. For the convenience of description, hereinafter, only the case where the third field is related to a public land mobile network (PLMN) will be taken as an example for illustration. Several possible I-RNTIs are shown in Table 1 as follows:

[0120] Table 1

[0121] First Field Second Field Third Field First Type of I - RNTI 20 bits 20 bits 0 bit Second Type of I - RNTI 24 bits 16 bits 0 bit Third Type of I - RNTI 20 bits 16 bits 4 bits Fourth Type of I - RNTI 40 bits 0 bit 0 bit

[0122] Among them: The first I-RNTI includes 20 bits of the first field and 20 bits of the second field. The second I-RNTI includes 24 bits of the first field and 16 bits of the second field. The third I-RNTI includes 20 bits of the first field, 16 bits of the second field, and 4 bits of the third field. The fourth I-RNTI includes 40 bits of the first field.

[0123] It can be understood that the four I-RNTIs in Table 1 are only examples and are not limited here specifically. The I-RNTI may include 40 bits or may include other numerical bits, which are not limited here specifically.

[0124] In the embodiments of the present application, the first I-RNTI (including 20 bits of the first field and 20 bits of the second field) is mainly taken as an example for illustrative description, and additional notes will be made when using other I-RNTIs (the second, third, and fourth).

[0125] The base station may obtain the I-RNTI from the core network or other base stations, or may generate the I-RNTI by itself.

[0126] In step 202, the terminal device obtains the I-RNTI.

[0127] When the UE is connected to the base station or when the connection state between the UE and the base station is released, the base station may send configuration information to the terminal, and the configuration information contains I-RNTI information. After the UE obtains the configuration information, it can obtain the I-RNTI from the configuration information.

[0128] In step 203, the terminal device generates target information according to the I-RNTI.

[0129] In the embodiments of this application, there are multiple ways for the terminal device to generate target information based on the I-RNTI, which are described separately below:

[0130] 1. The terminal device can generate target information based on some fields in the I-RNTI.

[0131] 1.1. The terminal device can generate target information based on the first field and the second field in the I-RNTI (such as Figure 5a , Figures 6 to 9 ).

[0132] The non-connected state UE can extract multiple bits from the first field and the second field respectively to obtain the target information. Of course, the base station can extract once to obtain the target information, or extract multiple times to obtain the target information. The specific number of extractions is not limited here.

[0133] The target information includes M bits extracted by the non-connected state UE from the first field and K bits extracted from the second field, where M is an integer greater than or equal to 1 and less than or equal to N, N is an integer greater than or equal to 2, and K is an integer greater than or equal to 0 and less than or equal to N - M. In the embodiments of this application, only N being 16 and 10 are used as examples for illustrative purposes. Among them, which positions of bits are extracted from the first field and which positions of bits are extracted from the second field are not limited here. For example, starting from the first bit of the first field or starting from the middle bit of the first field, starting from the middle bit of the second field or starting from the first bit of the second field. The bits extracted from the first field can be symmetric or asymmetric with the bits extracted from the second field. The specific situation is not limited here.

[0134] Table 2 shows several examples of target information including bits of the first field and the second field.

[0135] Table 2

[0136] First Field Second Field First Type of Target Information 15 bits 1 bit Second Type of Target Information 14 bits 2 bits Third Type of Target Information 13 bits 3 bits Fourth Type of Target Information 12 bits 4 bits Fifth Type of Target Information 11 bits 5 bits Sixth Type of Target Information 10 bits 6 bits Seventh Type of Target Information 9 bits 7 bits Eighth Type of Target Information 8 bits 8 bits Ninth Type of Target Information 16 bits 0 bit Tenth Type of Target Information 8 bits 6 bit Eleventh Type of Target Information 8 bits 4 bit Twelfth Type of Target Information 8 bits 2 bit Thirteenth Type of Target Information 8 bits 0 bit

[0137] The target information in Table 2 is only a simple example, not all extraction methods of the target information. There are other extraction methods for the target information. For example, 7 bits are extracted from the first field and 9 bits are extracted from the second field to form the target information. The specific situation is not limited here. If more bits are extracted from the first field than from the second field, it is beneficial to avoid conflicts with the target information extracted by other UEs.

[0138] 1.2. The terminal device can generate target information based on the first field, the second field, and the third field in the I-RNTI (such as Figure 5b ).

[0139] Exemplarily, the I-RNTI includes 20 bits of the first field, 16 bits of the second field, and 4 bits of the third field (the third type of I-RNTI). The UE extracts M bits from the first field, K bits from the second field, and N-K-M bits from the third field, where N is an integer greater than or equal to 2, M is an integer greater than or equal to 1 and less than or equal to N, and K is an integer greater than or equal to 0 and less than or equal to N-M.

[0140] In the embodiments of the present application, there are multiple ways for the terminal device to generate the target information according to some fields in the I-RNTI. That is, the I-RNTI may further include a fourth field and / or a fifth field, etc. The above two are only examples and are not specifically limited here.

[0141] 2. The terminal device can obtain the target identifier and generate the first target information and the second target information according to the I-RNTI and the target identifier (such as Figure 5c ).

[0142] The UE can obtain the target identifier from devices such as the core network device, the base station, or other network elements, which is not specifically limited here.

[0143] The target identifier given in the embodiments of the present application may include one or more of the international mobile subscriber identity (IMSI), the identifier corresponding to the base station to which the terminal device has established a connection (cellid), the identifier configured by the core network for the terminal device, the identifier corresponding to the base station with which the UE needs to communicate currently (cell id), etc., which is not specifically limited here. Only taking the target identifier including IMSI as an example for illustrative description below.

[0144] That is: If the sum of the number of bits M extracted from the first field and the number of bits K extracted from the second field is less than the length N of the target information, then the remaining N-M-K bits need to be extracted from a certain field that does not belong to the I-RNTI. Exemplarily, the certain field that does not belong to the I-RNTI is IMSI.

[0145] 3. The terminal device can generate the target information according to a certain field in the I-RNTI (for example: the first field) (such as Figure 5d And Figure 5e ).

[0146] That is, when the I-RNTI includes multiple fields, the UE generates the target information according to a certain field (the first field, the second field, or the third field) among the multiple fields, or the I-RNTI only includes one field, and the UE generates the target information according to this field, etc., which is not specifically limited here.

[0147] In another implementation method, the I-RNTI includes 40 bits of a first field (the fourth type of I-RNTI), and the UE extracts N bits from the first field, where N is an integer greater than or equal to 2.

[0148] In the embodiments of the present application, there are various ways for the terminal device to generate the target information according to the I-RNTI. The above three are just examples and are not specifically limited here. The target information in the embodiments of the present application can be used for cyclic redundancy check (CRC) information for scrambling / descrambling downlink control information (DCI), obtaining the search space of the physical downlink control channel (PDCCH), scrambling / descrambling the PDCCH, physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), or physical uplink shared channel (PUSCH).

[0149] The target information in the embodiments of the present application includes first target information and second target information.

[0150] The functions of the first target information and the second target information can be one of the following situations:

[0151] 1.1. The first target information is used for descrambling the CRC information of the DCI, and the second target information is used for obtaining the search space of the PDCCH.

[0152] 1.2. The first target information is used for descrambling the CRC information of the DCI, and the second target information is used for descrambling the PDCCH.

[0153] 1.3. The first target information is used for descrambling the PDCCH, and the second target information is used for obtaining the search space of the PDCCH.

[0154] The following uses the accompanying drawings to schematically illustrate several situations of the target information.

[0155] Exemplarily, as shown in FIG. 5(a), the target information, the first target information is the fifth situation in Table 2: M = 11, K = 5. That is, 11 bits are extracted from the first field and 5 bits are extracted from the second field to form a 16-bit first bit string (or first field) a0. Specifically, it can be that the 1st to 11th bits are extracted from the first field and the 1st to 5th bits are extracted from the second field to form the 16-bit first bit string a0.

[0156] The second target information is the seventh situation in Table 2: M = 9, K = 7. That is, 9 bits are extracted from the first field and 7 bits are extracted from the second field to form a 16-bit second bit string (or second field) b0. Specifically, it can be that the 12th to 20th bits are extracted from the first field and the 14th to 20th bits are extracted from the second field to form the 16-bit second bit string b0.

[0157] Exemplarily, the target information is shown in Fig. 5(b). For the third I-RNTI, the first target information selects M = 8, K = 6, and N = 16. That is, 8 bits are extracted from the first field, 6 bits are extracted from the second field, and 2 bits are extracted from the third field to form a 16-bit first bit string (or first field) a0. Specifically, the 1st to 8th bits can be extracted from the first field, the 1st to 6th bits can be extracted from the second field, and the 1st to 2nd bits can be extracted from the third field to form the 16-bit first bit string a0.

[0158] The second target information selects M = 8, K = 6, and N = 16. That is, 8 bits are extracted from the first field, 6 bits are extracted from the second field, and 2 bits are extracted from the third field to form a 16-bit second bit string (or second field) b0. Specifically, the 9th to 16th bits can be extracted from the first field, the 7th to 12th bits can be extracted from the second field, and the 3rd to 4th bits can be extracted from the third field to form the 16-bit second bit string b0.

[0159] Exemplarily, the target information is shown in Fig. 5(c). The first target information is the eleventh case in Table 2: M = 8, K = 4, and N = 16. That is, 8 bits are extracted from the first field, 4 bits are extracted from the second field, and 4 bits are extracted from the IMSI to form a 16-bit first bit string (or first field) a0. Specifically, the 1st to 8th bits can be extracted from the first field, the 1st to 4th bits can be extracted from the second field, and the 1st to 4th bits can be extracted from the IMSI to form the 16-bit first bit string a0.

[0160] The second target information is the eleventh case in Table 2: M = 8, K = 4, and N = 16. That is, 8 bits are extracted from the first field, 4 bits are extracted from the second field, and 4 bits are extracted from the IMSI to form a 16-bit second bit string (or second field) b0. Specifically, the 9th to 16th bits can be extracted from the first field, the 5th to 8th bits can be extracted from the second field, and the 5th to 8th bits can be extracted from the IMSI to form the 16-bit second bit string b0.

[0161] Exemplarily, the target information is shown in Fig. 5(d). The first target information is the ninth case in Table 2: M = 16, K = 0. That is, 16 bits are extracted from the first field to form a 16-bit first bit string (or first field) a0. Specifically, the 1st to 16th bits can be extracted from the first field to form the 16-bit first bit string a0.

[0162] The second target information is the ninth case in Table 2: M = 16, K = 0. That is, 16 bits are extracted from the first field to form a 16-bit second bit string (or second field) b0. Specifically, the 7th to 20th bits can be extracted from the first field and the 1st to 2nd bits can be extracted from the first field to form the 16-bit second bit string b0.

[0163] Exemplarily, as shown in Figure 5(e) for the fourth I-RNTI, the first target information selects M = 16, N = 16. That is, 16 bits are extracted from the first field to form a 16-bit first bit string (or first field) a0. Specifically, the 1st to 8th bits can be extracted from the first field and the 21st to 28th bits can be extracted from the first field to form the 16-bit first bit string a0.

[0164] The second target information selects M = 16, N = 16. That is, 16 bits are extracted from the first field to form a 16-bit second bit string (or second field) b0. Specifically, the 7th to 14th bits can be extracted from the first field and the 27th to 34th bits can be extracted from the first field to form the 16-bit second bit string b0.

[0165] Optionally, the target information further includes third target information. The first target information is used to obtain the search space of PDCCH, the second target information is used to descramble PDCCH, and the third target information is used to descramble the CRC information of DCI.

[0166] Exemplarily, the target information is as Figure 6 shown. The first target information is the eighth case in Table 2: M = 8, K = 8. That is, 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit first bit string (or first field) a1. Specifically, the 1st to 8th bits can be extracted from the first field and the 1st to 8th bits can be extracted from the second field to form the 16-bit first bit string a1.

[0167] The second target information is the eighth case in Table 2: M = 8, K = 8. That is, 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit second bit string (or second field) b1. Specifically, the 7th to 14th bits can be extracted from the first field and the 7th to 14th bits can be extracted from the second field to form the 16-bit second bit string b1.

[0168] The third target information is the eighth case in Table 2: M = 8, K = 8. That is, 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit third bit string (or third field) c1. Specifically, it can be extracting the 13th to 20th bits from the first field and the 13th to 20th bits from the second field to form the 16-bit third bit string c1.

[0169] Of course, specifically which 8 bits are extracted from the first field and which 8 bits are extracted from the second field are not limited here. Figure 6 What is shown is just an example of the eighth target information in Table 2.

[0170] Exemplarily, the target information is as Figure 7 shown. The first target information is the sixth case in Table 2, M = 10, K = 6. That is, 10 bits are extracted from the first field and 6 bits are extracted from the second field to form a 16-bit bit string (or first field) a2. Specifically, it can be extracting the 1st to 10th bits from the first field and the 1st to 6th bits from the second field to form the 16-bit first bit string a2.

[0171] The second target information is the second bit string (or second field) b2, M = 6, K = 10. That is, 6 bits are extracted from the first field and 10 bits are extracted from the second field to form a 16-bit second bit string b2. Specifically, it can be extracting the 8th to 14th bits from the first field and the 6th to 14th bits from the second field to form the 16-bit second bit string b2.

[0172] The third target information is the third bit string (or third field) c2, M = 6, K = 10. That is, 6 bits are extracted from the first field and 10 bits are extracted from the second field to form a 16-bit third bit string c2. Specifically, it can be extracting the 15th to 20th bits from the first field and the 11th to 20th bits from the second field to form the 16-bit third bit string c2.

[0173] Exemplarily, the target information is as Figure 8 shown. The first target information is the eighth case in Table 2: M = 8, K = 8. That is, 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit first bit string (or first field) a3. Specifically, it can be extracting the 1st, 2nd, 3rd, 9th, 10th, 11th, 17th, 18th bits from the first field and the 1st, 2nd, 3rd, 9th, 10th, 11th, 17th, 18th bits from the second field to form the 16-bit first bit string a3.

[0174] The second target information is the eighth case in Table 2: M = 8, K = 8. That is, 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit second bit string (or second field) b3. Specifically, the 4th, 5th, 6th, 12th, 13th, 14th, 19th, and 20th bits are extracted from the first field and the 4th, 5th, 6th, 12th, 13th, 14th, 19th, and 20th bits are extracted from the second field to form the 16-bit second bit string b3.

[0175] The third target information is the eighth case in Table 2: M = 8, K = 8. The third target information includes a third bit string (or third field) c3 and a fourth bit string (or fourth field) d. That is, 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit bit string c3. 8 bits are extracted from the first field and 8 bits are extracted from the second field to form a 16-bit fourth bit string d. Specifically, the 1st to 8th bits are extracted from the first field and the 1st to 8th bits are extracted from the second field to form the 16-bit third bit string c3. The 9th to 16th bits are extracted from the first field and the 9th to 16th bits are extracted from the second field to form the 16-bit fourth bit string d.

[0176] Optionally, the target information further includes fourth target information and / or fifth target information.

[0177] Exemplarily, the fourth target information and / or fifth target information are as Figure 9 shown. The fourth target information or the fifth target information includes a fifth bit string e (M = 11, K = 8, N = 16) and / or a sixth bit string f (M = 10, K = 0, N = 10). That is, 11 bits are extracted from the first field and 5 bits are extracted from the second field to form a 16-bit fifth bit string (or fifth field) e. A sixth bit string (or sixth field) f of 10 bits is extracted from the first field. Specifically, the 1st to 11th bits are extracted from the first field and the 1st to 5th bits are extracted from the second field to form the 16-bit fifth bit string e. The 11th to 20th bits are extracted from the first field to form the 10-bit sixth bit string f.

[0178] In the embodiments of the present application, the 16-bit first bit string a (a0, a1, and a2), second bit string b (b0, b1, b2, and b3), third bit string c (c1, c2, and c3), fourth bit string d, and fifth bit string e may be the same or different.

[0179] Since the first field is related to the UE, in order to reduce the probability of collision with other UEs, on the one hand: more bits can be extracted from the first field, and on the other hand: the extraction of multiple target information should minimize the overlap, so that all bits in the first field and the second field are allocated to multiple target information, as Figures 6 to 8 shown, 20 bits of the first field and 20 bits of the second field are each extracted at least once.

[0180] In addition to the above Figures 5a to 9 shown method, there are other ways to generate the target information in the embodiments of the present application, which are not specifically limited here.

[0181] The extraction rules in the embodiments of the present application (which positions of the first field and which positions of the second field are extracted) are only examples above. The specific extraction rules are determined according to actual needs and are not limited here.

[0182] In step 204, the network device generates target information according to the I-RNTI.

[0183] The way for the network device to generate target information according to the I-RNTI is similar to the way for the non-connected state UE to generate target information according to the I-RNTI in the foregoing step 203, and will not be elaborated here.

[0184] In step 205, the network device sends DCI on the physical downlink control channel PDCCH according to the target information.

[0185] In the embodiments of the present application, the target information is at least used to obtain any two of the search space of the PDCCH, the CRC information for scrambling the DCI, and the scrambling of the PDCCH. Hereinafter, only the case where the target information is used to obtain the search space of the PDCCH and the CRC information for scrambling the DCI (that is, the first target information is used to obtain the search space of the PDCCH, and the second target information is used to scramble the CRC information of the DCI) is taken as an example for illustrative description.

[0186] The base station obtains the search space of the PDCCH according to the first bit string (i.e., the first target information), that is, the base station determines on which candidate positions to send the DCI. The search space of the PDCCH can also be understood as the candidate positions for carrying the DCI. The search space of the PDCCH can, for example, satisfy formula one:

[0187] Formula one:

[0188]

[0189] Y = (K·A) mod d.

[0190] Among them, the candidate positions for carrying DCI may include L control channel elements (CCEs), where L can be 1, 2, 4, or 8, m is the number of the candidate position, N is the number of CCEs in the PDCCH resource, M is the number of candidate positions in the PDCCH resource, n is the bias, i indicates the specific positions of the L CCEs in the candidate position, i = 0,... L - 1, K = 39827 or 39829 or 39839, d = 65537, and A is the value corresponding to the first bit string a. For example, if the first bit string is 1111111111111111 (i.e., 16 1s), then the value corresponding to the first bit string is 65535.

[0191] In the embodiments of this application, the value corresponding to the bit string can be understood as the decimal value corresponding to the bit string.

[0192] The above formula one only provides a feasible implementation method. In actual applications, the base station can also use the first bit string to obtain the search space of the PDCCH according to other formulas, which is not specifically limited here.

[0193] The base station scrambles the CRC information of the DCI according to the second bit string (i.e., the second target information). The scrambled CRC information can satisfy, for example, formula two:

[0194] Formula two:

[0195] d k = a k ·k, k = 0, 1... 7;

[0196] d k =(a k + B k-8 ) mod 2, k = 8, 9... 23.

[0197] Among them, a 0 , a 1 ... a 23 represents each bit in the CRC, B 0 , B 1 ... B 15 represents each bit in the second bit string b, and d 0 , d 1 ... d 23 represents each bit in the scrambled CRC.

[0198] The above formula two only provides a feasible implementation method. In actual applications, the base station can also use the second bit string to scramble the CRC information of the DCI according to other formulas, which is not specifically limited here.

[0199] Optionally, when the target information further includes third target information, the base station obtains the initial value C of the scrambling sequence according to the third bit string init , where the initial value C init For example, it can satisfy Formula 3. Or obtain the initial value C of the scrambling sequence according to the third bit string and the fourth bit string init , where the initial value C init For example, it can satisfy Formula 4. The base station can obtain a pseudo-random code to scramble the PDCCH according to C init , and scramble the DCI carried on the PDCCH through a predefined pseudo-random function generator, that is, scramble the CRC information of the DCI

[0200] Formula 3:

[0201] C init =(C·2 16 +n id )mod2 31 .

[0202] Among them, n id is the ID of the cell, and this cell is, for example, the cell served by this base station, and C is the value corresponding to the third bit string

[0203] Formula 4:

[0204] C init =(C·2 16 +D)mod2 31 .

[0205] Among them, C is the value corresponding to the third bit string, and D is the value corresponding to the fourth bit string

[0206] The above two formulas only provide two realizable ways. In actual applications, the base station can also obtain the initial value C of the scrambling sequence according to other formulas using the third bit string and / or the fourth bit string init , which is not specifically limited here

[0207] In step 206, the terminal device monitors the PDCCH according to the target information

[0208] Corresponding to step 205, only the case where the target information is used to obtain the search space of the PDCCH and the CRC information for descrambling the DCI (that is, the first target information is used to obtain the search space of the PDCCH, and the second target information is used to descramble the CRC information of the DCI) is used as an example for illustrative description

[0209] The non-connected UE listens for the PDCCH based on the target information and attempts to receive the downlink control information, that is, the UE determines the search space of the PDCCH according to the first bit string. The search space of the PDCCH can also be understood as the candidate positions carrying the DCI. Among them, the search space of the PDCCH can satisfy Formula 1, for example. After determining the candidate positions, the UE can attempt to receive the DCI at the corresponding candidate positions. The UE descrambles the CRC information of the DCI according to the second bit string. The descrambled CRC information can satisfy Formula 2, for example.

[0210] Optionally, the non-connected UE obtains the initial value C of the first scrambling code sequence according to the third bit string init , where the initial value C init can satisfy Formula 3, for example. Or obtain the initial value C of the scrambling code sequence according to the third bit string and the fourth bit string init , where the initial value C init can satisfy Formula 4, for example. The UE can obtain a pseudo-random code according to C init through a pre-defined pseudo-random function generator to descramble the PDCCH, that is, to descramble the DCI carried on the PDCCH and attempt to receive the DCI.

[0211] In the optional step 207, the network device sends downlink shared information on the physical downlink shared channel PDSCH according to the target information.

[0212] Optionally, the base station obtains the initial value C of the scrambling code sequence according to the fifth bit string and / or the sixth bit string init , where the initial value C init can satisfy Formula 5, for example. And according to C init , a pseudo-random code can be obtained through a pre-defined pseudo-random function generator to scramble the PDSCH, that is, to scramble the downlink shared information carried on the PDSCH.

[0213] Formula 5:

[0214] Single-stream transmission: C init = E·2 15 + F.

[0215] Multi-stream transmission: C init = E·2 15 + F + q·2 14 .

[0216] Among them, E is the bits in the fifth bit string e, F is the bits in the sixth bit string F, q represents the number of layers of the PDSCH transmission, and multi-stream transmission is to transmit multiple data on the same time-frequency resource through multiple input multiple output (MIMO) technology (that is, multi-antenna technology).

[0217] The above formula five only provides an implementable way. In actual applications, the base station can also scramble the downlink shared information according to the fifth bit string and / or the sixth bit string according to other formulas, and specific details are not limited here.

[0218] In the optional step 208, the terminal device receives the PDSCH according to the target information.

[0219] Optionally, the non-connected UE receives the PDSCH according to the target information, and receives the downlink shared information, that is, obtains the initial value C of the scrambling code sequence according to the fifth bit string e and / or the sixth bit string f init , where the initial value C init For example, it can satisfy formula five. The UE can obtain a pseudo-random code according to C init , and use a pre-defined pseudo-random function generator to descramble the PDSCH.

[0220] In the optional step 209, the terminal device scrambles the uplink channel according to the target information.

[0221] The uplink channel in the embodiments of the present application is, for example, PUCCH or PUSCH.

[0222] Optionally, the non-connected UE scrambles the PUCCH or PUSCH according to the target information (which may be the fourth target information), that is, the UE obtains the initial value C of the scrambling code sequence according to the fifth bit string and / or the sixth bit string init , where the initial value C init For example, it can satisfy formula five. The UE obtains a pseudo-random code according to C init , and uses a pre-defined pseudo-random function generator to scramble the PUCCH or PUSCH, that is, scramble the uplink information carried on the PUCCH or PUSCH.

[0223] In the optional step 210, the terminal device sends uplink information on the uplink channel.

[0224] After the non-connected UE scrambles the uplink channel, the UE sends uplink information to the base station on the uplink channel. The uplink information may be uplink information sent by the non-connected UE to the base station according to the received DCI, or the uplink information may have no association with the received DCI, and specific details are not limited here.

[0225] In the optional step 211, the network device descrambles the uplink channel according to the target information.

[0226] The base station obtains the initial value C of the scrambling code sequence according to the fifth bit string and / or the sixth bit string (that is, the fourth target information) init , where the initial value C initFor example, it can satisfy Formula 5. The base station can obtain C init , and through a predefined pseudo-random function generator, a pseudo-random code can be obtained to scramble PUCCH or PUSCH, that is, to scramble the uplink information carried on PUCCH or PUSCH.

[0227] In the embodiments of the present application, steps 209-211 can be before steps 207-208, steps 209-211 can also be after steps 207-208, and steps 209-211 and steps 207-208 can also be performed simultaneously. The present application does not make any limitations in this regard. In the embodiments of the present application, step 201 can be before step 202, step 201 can also be after step 202, and step 201 and step 202 can also be executed simultaneously. The present application does not make any limitations in this regard. In the embodiments of the present application, step 203 can be before step 204, step 203 can also be after step 204, and step 203 and step 204 can also be executed simultaneously. The present application does not make any limitations in this regard.

[0228] In this embodiment, the base station and the UE generate target information according to the I-RNTI, and scramble and descramble the downlink control information according to the target information. Since the first field is related to the UE, more bits can be extracted from the first field, or all bits can be extracted from the first field and the second field respectively, so that all bits in the first field and the second field are allocated to multiple target information. As Figures 6 to 8 shown, 20 bits of the first field and 20 bits of the second field are each extracted at least once. On the one hand, the security and reliability of downlink control information transmission are improved. On the other hand, the conflict probability with the target information of other UEs is reduced.

[0229] Please refer to Figure 3 , another embodiment of the communication method in the embodiments of the present application includes: steps 301 to 304, step 307, and step 308.

[0230] In step 301, the network device obtains the I-RNTI.

[0231] In step 302, the terminal device obtains the I-RNTI.

[0232] In step 303, the terminal device generates target information according to the I-RNTI.

[0233] In step 304, the network device generates target information according to the I-RNTI.

[0234] In the optional step 305, the network device sends DCI on the physical downlink control channel PDCCH according to the target information.

[0235] In optional step 306, the terminal device monitors the PDCCH according to the target information.

[0236] Steps 301 and 306 in this embodiment are similar to steps 201 and 206 in the foregoing Figure 2 illustrated embodiment, and will not be elaborated here.

[0237] In step 307, the network device sends downlink shared information on the Physical Downlink Shared Channel (PDSCH) according to the target information.

[0238] The base station obtains the initial value C of the scrambling sequence according to the fifth bit string and / or the sixth bit string init , where the initial value C init For example, it can satisfy Formula Five. The base station can obtain a pseudo-random code to scramble the PDSCH according to C init , and scramble the downlink shared information carried on the PDSCH through a predefined pseudo-random function generator.

[0239] In step 308, the terminal device receives the PDSCH according to the target information.

[0240] The non-connected state UE receives the PDSCH according to the target information and attempts to receive the downlink shared information, that is, obtains the initial value C of the scrambling sequence according to the fifth bit string e and / or the sixth bit string f init , where the initial value C init For example, it can satisfy Formula Five. The UE can obtain a pseudo-random code to descramble the PDSCH according to C init , and descramble the PDSCH through a predefined pseudo-random function generator.

[0241] In optional step 309, the terminal device scrambles the uplink channel according to the target information.

[0242] In optional step 310, the terminal device sends uplink information to the network device on the uplink channel.

[0243] In optional step 311, the network device descrambles the uplink channel according to the target information.

[0244] Steps 309 and 311 in this embodiment are similar to steps 209 and 211 in the foregoing Figure 2 illustrated embodiment, and will not be elaborated here.

[0245] In the embodiments of the present application, steps 309-311 may be before steps 307-308, steps 309-311 may also be after steps 307-308, and steps 309-311 and steps 307-308 may also be performed simultaneously. The present application does not make any limitation in this regard. In the embodiments of the present application, step 301 may be before step 302, step 301 may also be after step 302, and step 301 and step 302 may also be executed simultaneously. The present application does not make any limitation in this regard. In the embodiments of the present application, step 303 may be before step 304, step 303 may also be after step 304, and step 303 and step 304 may also be executed simultaneously. The present application does not make any limitation in this regard.

[0246] In this embodiment, the base station and the UE generate target information according to the I-RNTI, and perform scrambling and descrambling on the downlink shared information according to the target information. Since the first field is related to the UE, more bits can be extracted from the first field, or all bits can be extracted from both the first field and the second field, so that all the bits in the first field and the second field are allocated to multiple target information. As Figures 6 to 8 shown, 20 bits of the first field and 20 bits of the second field are each extracted at least once. On the one hand, the security and reliability of the downlink shared information transmission are improved. On the other hand, the probability of collision with the target information of other UEs is reduced.

[0247] Please refer to Figure 4 , another embodiment of the communication method in the embodiments of the present application includes: steps 401 to 404, steps 409 to 411.

[0248] In step 401, the network device obtains the I-RNTI.

[0249] In step 402, the terminal device obtains the I-RNTI.

[0250] In step 403, the terminal device generates target information according to the I-RNTI.

[0251] In step 404, the network device generates target information according to the I-RNTI.

[0252] In the optional step 405, the network device sends DCI on the physical downlink control channel PDCCH according to the target information.

[0253] In the optional step 406, the terminal device monitors the PDCCH according to the target information.

[0254] In the optional step 407, the network device sends downlink shared information on the physical downlink shared channel PDSCH according to the target information.

[0255] In an optional step 408, the terminal device receives a PDSCH according to the target information.

[0256] Step 401 and step 408 in this embodiment are similar to step 201 and step 208 in the foregoing Figure 2 shown embodiment, and will not be described herein again.

[0257] In step 409, the terminal device scrambles the uplink channel according to the target information.

[0258] In step 410, the terminal device sends uplink information to the network device on the uplink channel.

[0259] In step 411, the network device descrambles the uplink channel according to the target information.

[0260] Step 409 and step 411 in this embodiment are similar to step 209 and step 211 in the foregoing Figure 2 shown embodiment, and will not be described herein again.

[0261] In the embodiments of the present application, steps 409-411 may be before steps 407-408, steps 409-411 may also be after steps 407-408, steps 409-411 and steps 407-408 may also be performed simultaneously, and the present application does not make a limitation thereon. In the embodiments of the present application, step 401 may be before step 402, step 401 may also be after step 402, step 401 and step 402 may also be executed simultaneously, and the present application does not make a limitation thereon. In the embodiments of the present application, step 403 may be before step 404, step 403 may also be after step 404, step 403 and step 404 may also be executed simultaneously, and the present application does not make a limitation thereon.

[0262] In this embodiment, the base station and the UE generate target information according to the I-RNTI, and scramble and descramble the uplink information according to the target information. Since the first field is related to the UE, more bits can be extracted from the first field, or all bits can be extracted from each of the first field and the second field, so that all bits in the first field and the second field are allocated to multiple target information, such as Figures 6 to 8 shown, 20 bits of the first field and 20 bits of the second field are each extracted at least once. On the one hand, the security and reliability of uplink information transmission are improved. On the other hand, the probability of conflict with the target information of other UEs is reduced.

[0263] Corresponding to the method given in the above method embodiment, the embodiments of the present application also provide a corresponding device, including modules for performing the corresponding embodiments above. The module can be software, hardware, or a combination of software and hardware.

[0264] Please refer to Figure 10, an embodiment of the communication device in the embodiments of the present application. The communication device may be a terminal device or a component of a terminal device (such as a processor, a chip, or a chip system). The communication device includes:

[0265] An acquisition unit 1001, configured to acquire an Inactive Radio Network Temporary Identity (I-RNTI).

[0266] A generation unit 1002, configured to generate first target information and second target information according to the I-RNTI.

[0267] A monitoring unit 1003, configured to monitor a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

[0268] In this embodiment, the operations performed by each unit in the communication device are similar to those described in the foregoing Figure 2 、 Figure 3 or Figure 4 embodiments shown, and will not be elaborated herein.

[0269] In this embodiment, the generation unit 1002 generates first target information and second target information according to the I-RNTI, and the monitoring unit 1003 monitors the Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information, improving the security and reliability of downlink data transmission.

[0270] Please refer to Figure 11 , another embodiment of the communication device in the embodiments of the present application. The communication device may be a terminal device or a component of a terminal device (such as a processor, a chip, or a chip system). The communication device includes:

[0271] An acquisition unit 1101, configured to acquire an Inactive Radio Network Temporary Identity (I-RNTI).

[0272] A generation unit 1102, configured to generate first target information and second target information according to the I-RNTI.

[0273] A monitoring unit 1103, configured to monitor a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

[0274] The terminal device in this embodiment further includes:

[0275] A descrambling unit 1104, configured to descramble a Physical Downlink Shared Channel (PDSCH) according to fifth target information.

[0276] A scrambling unit 1105, configured to scramble a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) according to fourth target information.

[0277] The obtaining unit 1101 is further configured to obtain a target identifier.

[0278] The generating unit 1102 is further configured to generate a fourth target information and / or a fifth target information according to the I-RNTI.

[0279] In this embodiment, the operations performed by each unit in the communication device are similar to those described in the foregoing Figure 2 , Figure 3 or Figure 4 shown embodiments, and will not be described herein again.

[0280] In this embodiment, the generating unit 1102 generates a first target information and a second target information according to the I-RNTI, and the monitoring unit 1103 monitors the physical downlink control channel PDCCH according to the first target information and the second target information. The security and reliability of downlink data transmission are improved. The scrambling unit 1105 scrambles the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH according to the fourth target information. The security and reliability of uplink data transmission are improved.

[0281] The network device in the embodiment of the present application will be described below. Please refer to Figure 12 , an embodiment of the communication device in the embodiment of the present application. The communication device may be a network device, or a component of a network device (such as a processor, a chip, or a chip system). The communication device includes:

[0282] An obtaining unit 1201, configured to obtain an inactive radio network temporary identifier I-RNTI.

[0283] A generating unit 1202, configured to generate a first target information and a second target information according to the I-RNTI.

[0284] A sending unit 1203, configured to send DCI on the physical downlink control channel PDCCH according to the first target information and the second target information.

[0285] In this embodiment, the operations performed by each unit in the communication device are similar to those described in the foregoing Figure 2 , Figure 3 or Figure 4 shown embodiments, and will not be described herein again.

[0286] In this embodiment, the generating unit 1202 generates a first target information and a second target information according to the I-RNTI, and the sending unit 1203 sends DCI on the physical downlink control channel PDCCH according to the first target information and the second target information. The security and reliability of downlink data transmission are improved.

[0287] Please refer to Figure 13, Another embodiment of the communication device in the embodiments of the present application. The communication device may be a network device or a component of a network device (such as a processor, a chip, or a chip system). The communication device includes:

[0288] An obtaining unit 1301, configured to obtain an inactive radio network temporary identity I-RNTI.

[0289] A generating unit 1302, configured to generate first target information and second target information according to the I-RNTI.

[0290] A sending unit 1303, configured to send DCI on a physical downlink control channel PDCCH according to the first target information and the second target information.

[0291] The communication device in this embodiment further includes:

[0292] A scrambling unit 1304, configured to scramble a physical downlink shared channel PDSCH according to fifth target information.

[0293] A descrambling unit 1305, configured to descramble a physical uplink shared channel PUSCH or a physical uplink control channel PUCCH according to fourth target information.

[0294] The obtaining unit 1301 is further configured to obtain a target identifier.

[0295] The generating unit 1302 is further configured to generate fourth target information and / or fifth target information according to the I-RNTI.

[0296] In this embodiment, the operations performed by each unit in the communication device are similar to those described in the foregoing Figure 2 , Figure 3 or Figure 4 shown embodiments, and will not be described herein again.

[0297] In this embodiment, the generating unit 1302 generates first target information and second target information according to the I-RNTI, and the sending unit 1303 sends DCI on the physical downlink control channel PDCCH according to the first target information and the second target information, improving the security and reliability of downlink data transmission. The descrambling unit 1305 descrambles the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH according to the fourth target information, improving the security and reliability of uplink data transmission.

[0298] Figure 14The structural schematic diagram of a device is given. The device 1400 may be a network device, a terminal device, a chip, a chip system, or a processor that supports the network device to implement the above method, or may also be a chip, a chip system, or a processor that supports the terminal device to implement the above method. This device can be used to implement the method described in the above method embodiments. For specific details, please refer to the description in the above method embodiments.

[0299] The device 1400 may include one or more processors 1401. The processor 1401 may also be referred to as a processing unit and can implement certain control functions. The processor 1401 may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DUs, or CUs, etc.), execute software programs, and process the data of software programs.

[0300] In an alternative design, the processor 1401 may also store instructions and / or data 1403, and the instructions and / or data 1403 can be run by the processor, enabling the device 1400 to execute the method described in the above method embodiments.

[0301] In another alternative design, the processor 1401 may include a transceiver unit for implementing receiving and sending functions. For example, the transceiver unit may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receiving and sending functions may be separate or integrated together. The above transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or the above transceiver circuit, interface, or interface circuit can be used for signal transmission or transfer.

[0302] In yet another possible design, the device 1400 may include a circuit that can implement the functions of sending, receiving, or communication in the foregoing method embodiments.

[0303] Optionally, the device 1400 may include one or more memories 1402, on which instructions 1404 may be stored. The instructions can be run on the processor, enabling the device 1400 to execute the method described in the above method embodiments. Optionally, data may also be stored in the memory. Optionally, instructions and / or data may also be stored in the processor. The processor and the memory may be provided separately or integrated together. For example, the corresponding relationships described in the above method embodiments may be stored in the memory or in the processor.

[0304] Optionally, the device 1400 may further include a transceiver 1405 and / or an antenna 1406. The processor 1401 may be referred to as a processing unit to control the device 1400. The transceiver 1405 may be referred to as a transceiver unit, transceiver, transceiver circuit, transceiver device, or transceiver module, etc., for implementing the transceiver function.

[0305] Optionally, the device 1400 in the embodiments of the present application may be used to execute the Figure 2 , Figure 3 , or Figure 4 method described in the present application, or may also be used to execute the method that combines the methods described in the above two figures or more figures.

[0306] The processor and transceiver described in the present application may be implemented on an integrated circuit (IC), analog IC, radio frequency integrated circuit RFIC, mixed signal IC, application specific integrated circuit (ASIC), printed circuit board (PCB), electronic device, etc. The processor and transceiver may also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), N-type metal oxide semiconductor (nMOS), P-type metal oxide semiconductor (PMOS), bipolar junction transistor (BJT), BiCMOS, silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0307] The device described in the above embodiments may be a network device or a terminal device, but the scope of the device described in the present application is not limited thereto, and the structure of the device may not be subject to Figure 14 restrictions. The device may be an independent device or may be a part of a larger device. For example, the device may be:

[0308] (1) An independent integrated circuit IC, or chip, or chip system or subsystem;

[0309] (2) A set of one or more ICs. Optionally, the IC set may also include a storage component for storing data and / or instructions;

[0310] (3) ASIC, such as a modem (MSM);

[0311] (4) Modules that can be embedded in other devices;

[0312] (5) Receivers, terminals, smart terminals, cellular phones, wireless devices, handsets, mobile units, in-vehicle devices, network devices, cloud devices, artificial intelligence devices, machine devices, home devices, medical devices, industrial devices, etc.;

[0313] (6) Others, etc.

[0314] Figure 15 A structural schematic diagram of a terminal device is provided. The terminal device can be applicable to Figure 1 the scenarios shown. For the sake of convenience of description, Figure 15 only the main components of the terminal device are shown. As Figure 15 shown, the terminal device 1500 includes a processor, a memory, a control circuit, an antenna, and an input / output device. The processor is mainly used for processing communication protocols and communication data, and controlling the entire terminal, executing software programs, and processing the data of software programs. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used for transmitting and receiving radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving data input by users and outputting data to users.

[0315] After the terminal device is powered on, the processor can read the software program in the storage unit, parse and execute the instructions of the software program, and process the data of the software program. When data needs to be wirelessly transmitted, the processor performs baseband processing on the data to be transmitted and then outputs a baseband signal to the radio frequency circuit. The radio frequency circuit processes the baseband signal to obtain a radio frequency signal and transmits the radio frequency signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna. The radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor. The processor converts the baseband signal into data and processes the data.

[0316] For the sake of convenience of description, Figure 15 only one memory and one processor are shown. In an actual terminal device, there may be multiple processors and memories. The memory can also be referred to as a storage medium or a storage device, etc. The embodiments of the present invention do not limit this.

[0317] As an optional implementation manner, the processor may include a baseband processor and a central processor. The baseband processor is mainly used for processing communication protocols and communication data, and the central processor is mainly used for controlling the entire terminal device, executing software programs, and processing the data of software programs. Figure 15The processor therein integrates the functions of a baseband processor and a central processor. Those skilled in the art can understand that the baseband processor and the central processor can also be separate processors interconnected through technologies such as a bus. Those skilled in the art can understand that the terminal device can include multiple baseband processors to adapt to different network standards, and the terminal device can include multiple central processors to enhance its processing power. Each component of the terminal device can be connected through various buses. The baseband processor can also be referred to as a baseband processing circuit or a baseband processing chip. The central processor can also be referred to as a central processing circuit or a central processing chip. The function of processing communication protocols and communication data can be built into the processor or stored in the storage unit in the form of a software program, and the processor executes the software program to implement the baseband processing function.

[0318] In one example, an antenna and a control circuit with transceiver functions can be regarded as the transceiver unit 1511 of the terminal device 1500, and a processor with processing functions can be regarded as the processing unit 1512 of the terminal device 1500. As Figure 15 shown, the terminal device 1500 includes a transceiver unit 1511 and a processing unit 1512. The transceiver unit can also be called a transceiver, a transceiver machine, a transceiver device, etc. Optionally, the devices in the transceiver unit 1511 for implementing the receiving function can be regarded as the receiving unit, and the devices in the transceiver unit 1511 for implementing the sending function can be regarded as the sending unit, that is, the transceiver unit 1511 includes a receiving unit and a sending unit. Exemplarily, the receiving unit can also be called a receiver, a receiver circuit, etc., and the sending unit can be called a transmitter, a transmitter circuit, etc. Optionally, the above-mentioned receiving unit and sending unit can be an integrated unit or multiple independent units. The above-mentioned receiving unit and sending unit can be in one geographical location or dispersed in multiple geographical locations.

[0319] It can be understood that some optional features in the embodiments of the present application can, in some scenarios, be implemented independently without relying on other features, such as the current solution it is based on, to solve the corresponding technical problems and achieve the corresponding effects. In some scenarios, they can also be combined with other features according to requirements. Correspondingly, the devices given in the embodiments of the present application can also implement these features or functions accordingly, which will not be elaborated here.

[0320] Those skilled in the art can also understand that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and the design requirements of the entire system. Those skilled in the art can use various methods to implement the functions for the corresponding application, but such implementation should not be construed as exceeding the scope protected by the embodiments of the present application.

[0321] It can be understood that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiments can be completed by the integrated logic circuit in the hardware of the processor or instructions in software form. The above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0322] The solutions described in the present application can be implemented in various ways. For example, these technologies can be implemented in a hardware, software, or hardware - combined manner. For hardware implementation, the processing units for executing these technologies at a communication device (such as a base station, a terminal, a network entity, or a chip) can be implemented in one or more general - purpose processors, DSPs, digital signal processing devices, ASICs, programmable logic devices, FPGAs, or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The general - purpose processor can be a microprocessor. Optionally, the general - purpose processor can also be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0323] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be 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), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchlink DRAM (SLDRAM), and directrambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0324] The present application also provides a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a computer, it implements the functions of any one of the above method embodiments.

[0325] The present application also provides a computer program product, and when the computer program product is executed by a computer, it implements the functions of any one of the above method embodiments.

[0326] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, a computer, a server, or a data center to another website, a computer, a server, or a data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a high-density digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0327] It can be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures, or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments mentioned throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It can be understood that in various embodiments of the present application, the magnitudes of the serial numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0328] It can be understood that in the present application, "when", "if", and "in case" all mean that the device will perform corresponding processing under certain objective circumstances, not limited to a specific time, and it is not required that the device must have a judgment action when implemented, nor does it mean any other limitations.

[0329] The "simultaneously" in the present application can be understood as at the same time point, or within a period of time, or within the same cycle.

[0330] Those skilled in the art can understand that the various numerical numbers such as the first and second involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application. The specific values of the numbers (which can also be referred to as indexes) in this application, the specific values of the quantities, and the positions are only for illustrative purposes and are not the only representation forms, nor are they used to limit the scope of the embodiments of this application. The various numerical numbers such as the first and second involved in this application are also only for the convenience of description and are not used to limit the scope of the embodiments of this application.

[0331] In this application, the elements represented by the singular form are intended to mean "one or more", rather than "one and only one", unless otherwise specified. In this application, without otherwise specified, "at least one" is intended to mean "one or more", and "a plurality" is intended to mean "two or more".

[0332] In addition, the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Among them, A can be singular or plural, and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0333] The term "at least one of..." or "at least one kind of..." in this article means all or any combination of the items listed. For example, "at least one of A, B, and C" can represent: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, B and C exist simultaneously, and A, B, and C exist simultaneously. Among them, A can be singular or plural, B can be singular or plural, and C can be singular or plural.

[0334] It can be understood that in the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A. B can also be determined according to A and / or other information.

[0335] The corresponding relationships shown in each table in this application can be configured or predefined. The values of the information in each table are only examples and can be configured as other values, which are not limited in this application. When configuring the corresponding relationships between the configuration information and each parameter, it is not necessarily required to configure all the corresponding relationships shown in each table. For example, in the tables in this application, the corresponding relationships shown in some rows can also not be configured. Another example is that appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names understandable by the communication device, and the values or representation methods of the parameters can also use other values or representation methods understandable by the communication device. When implementing the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash maps, etc.

[0336] The predefined in this application can be understood as definition, pre - definition, storage, pre - storage, pre - negotiation, pre - configuration, solidification, or pre - firing.

[0337] Those of ordinary skill in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0338] Those of ordinary skill in the art can understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0339] It can be understood that the systems, devices, and methods described in this application can also be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms.

[0340] The unit described as a separate component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place or distributed across multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0341] In addition, in each embodiment of the present application, each functional unit may be integrated into a processing unit, may exist separately as individual physical units, or two or more units may be integrated into one unit.

[0342] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0343] In the present application, the same or similar parts among the various embodiments can be referred to each other. In each embodiment of the present application, as well as in each implementation manner / implementation method / realization method in each embodiment, if there is no special description and logical conflict, the terms and / or descriptions among different embodiments, as well as among the various implementation manners / implementation methods / realization methods in each embodiment, are consistent and can be mutually referred to. The technical features in different embodiments, as well as in the various implementation manners / implementation methods / realization methods in each embodiment, can be combined according to their inherent logical relationships to form new embodiments, implementation manners, implementation methods, or realization methods. The implementation manners of the present application described above do not constitute a limitation on the protection scope of the present application.

[0344] As described above, only the specific implementation manners of the present application are provided, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application.

Claims

1. A communication method, characterized in that, it includes: obtaining an Inactive Radio Network Temporary Identity (I-RNTI), where the I-RNTI includes at least one of a first field and a second field, the first field indicates information related to a terminal, and the second field indicates information related to a network device; generating first target information and second target information according to the I-RNTI, including: generating the first target information and the second target information according to the first field or the second field; listening for a Physical Downlink Control Channel (PDCCH) according to the first target information and the second target information.

2. The method according to claim 1, characterized in that, the first target information is used to scramble the Cyclic Redundancy Check (CRC) information of Downlink Control Information (DCI), and the second target information is used to obtain the search space of the PDCCH, and the DCI is carried on the PDCCH.

3. The method according to claim 1, characterized in that, the first target information is used to scramble the CRC information of DCI, and the second target information is used to scramble the PDCCH, and the DCI is carried on the PDCCH.

4. The method according to claim 1, characterized in that, the first target information is used to scramble the PDCCH, and the second target information is used to obtain the search space of the PDCCH.

5. The method according to claim 1, characterized in that, the method further includes: generating third target information according to the I-RNTI, where the first target information is used to obtain the search space of the PDCCH, the second target information is used to scramble the PDCCH, and the third target information is used to scramble the CRC information of DCI, and the DCI is carried on the PDCCH.

6. The method according to any one of claims 1 to 5, characterized in that, the method further includes: generating fourth target information according to the I-RNTI; scrambling a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) according to the fourth target information.

7. The method according to any one of claims 1 to 5, characterized in that, the method further includes: generating fifth target information according to the I-RNTI; descrambling a Physical Downlink Shared Channel (PDSCH) according to the fifth target information.

8. The method according to any one of claims 1 to 5, characterized in that, it further includes: obtaining a target identifier; generating first target information and second target information according to the I-RNTI, including: generating the first target information and the second target information according to the I-RNTI and the target identifier.

9. The method according to claim 8, characterized in that, the target identifier includes at least one of an International Mobile Subscriber Identity (IMSI) and a base station identifier.

10. The method according to claim 1, characterized in that, The I-RNTI further includes a third field, and the third field indicates information related to a public land mobile network (PLMN) and / or an operator.

11. A communication method, characterized in that, it includes: obtaining an inactive radio network temporary identifier (I-RNTI), where the I-RNTI includes at least one of a first field and a second field, the first field indicates information related to a terminal, and the second field indicates information related to a network device; generating first target information and second target information according to the I-RNTI, including: generating the first target information and the second target information according to the first field or the second field; sending downlink control information (DCI) on a physical downlink control channel (PDCCH) according to the first target information and the second target information.

12. The method according to claim 11, characterized in that, the first target information is used to scramble the cyclic redundancy check (CRC) information of the DCI, and the second target information is used to obtain the search space of the PDCCH.

13. The method according to claim 11, characterized in that, the first target information is used to scramble the cyclic redundancy check (CRC) information of the DCI, and the second target information is used to scramble the PDCCH.

14. The method according to claim 11, characterized in that, the first target information is used to scramble the PDCCH, and the second target information is used to obtain the search space of the PDCCH.

15. The method according to claim 11, characterized in that, the method further includes: generating third target information according to the I-RNTI, where the first target information is used to obtain the search space of the PDCCH, the second target information is used to scramble the PDCCH, and the third target information is used to scramble the cyclic redundancy check (CRC) information of the DCI.

16. The method according to any one of claims 11 to 15, characterized in that, the method further includes: generating fourth target information according to the I-RNTI; descrambling a physical uplink shared channel (PUSCH) or a physical uplink control channel (PUCCH) according to the fourth target information.

17. The method according to any one of claims 11 to 15, characterized in that, the method further includes: generating fifth target information according to the I-RNTI; scrambling a physical downlink shared channel (PDSCH) according to the fifth target information.

18. The method according to any one of claims 11 to 15, characterized in that, it further includes: obtaining a target identifier; generating first target information and second target information according to the I-RNTI, including: generating the first target information and the second target information according to the I-RNTI and the target identifier.

19. The method according to claim 18, characterized in that, the target identifier includes at least one of an international mobile subscriber identity (IMSI) and a base station identifier.

20. The method according to claim 11, characterized in that, The I-RNTI further includes a third field, and the third field indicates information related to a public land mobile network (PLMN) or an operator.

21. A communication device, characterized in that it includes: a processor, the processor is coupled to a memory, and the memory is used to store programs or instructions. When the programs or instructions are executed by the processor, the device is caused to execute the method according to any one of claims 1 to 10.

22. A communication device, characterized in that it includes: a processor, the processor is coupled to a memory, and the memory is used to store programs or instructions. When the programs or instructions are executed by the processor, the device is caused to execute the method according to any one of claims 11 to 20.

23. A communication system, characterized in that it includes: the device according to claim 21, and / or the device according to claim 22.

24. A computer-readable medium, characterized in that a computer program or instructions are stored thereon. When the computer program or instructions are run on a computer, the computer is caused to execute the method according to any one of claims 1 to 10 or execute the method according to any one of claims 11 to 20.

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