Communication method, communication device and communication system

Abstract

The invention relates to the technical field of communication, in particular to a communication method, a communication device and a communication system. The method comprises the following steps: receiving first information, wherein the first information is used for a random access process of a first feature; under the condition that the first information does not comprise the parameter information of the first type, uplink data transmission in the random access process of the first characteristic is carried out according to the parameter information of the second type; under the condition that the first information comprises parameter information of a first type, performing uplink data transmission in a random access process of a first feature according to the parameter information of the first type; and if the random access of the first feature is converted into the random access of the second feature, performing uplink data transmission in the random access process of the second feature according to the parameter information of the third type. Through the method, the consistency of parameter understanding of the network equipment and the UE is ensured.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method, a communication device and a communication system. Background Art

[0002] Today, as the 5G era is approaching, user equipment UE can access network equipment (base station) through random access. Among them, the current random access is divided into four-step random access (four-step random access) and two-step random access (2step RA). The four-step random access includes the sending of Msg1, Msg2, Msg3, and Msg4, and the two-step random access includes the sending of MsgA and MsgB. As business needs continue to change with technological development, the current random access has also extended to a variety of features or specific equipment types, such as RedCap (low complexity), SDT (small packet transmission), Slicing, and CE (coverage enhancement). These features and equipment types can be configured with corresponding random access resources. Moreover, the resources and configuration information of four-step random access and two-step random access can be configured separately under each feature / equipment type.

[0003] Since the parameters of random access under the above-mentioned characteristics or specific equipment types may be different from the parameters of random access under non-characteristics or non-specific equipment types, even when the UE performs a random access process under the relevant characteristics or specific equipment types, it is possible to use the parameters of non-characteristics or specific equipment types configured by the network equipment. This leads to a difference between the parameters expected by the network equipment side to be used by the UE and the parameters actually used by the UE, resulting in the failure of UE random access.

[0004] In summary, how to ensure consistency in parameter understanding between network equipment and UE is an issue that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The present application provides a communication method, a communication device and a communication system for ensuring consistency in parameter understanding between a network device and a UE.

[0006] In a first aspect, the present application provides a communication method, the execution subject of the method may be a terminal device (such as a first terminal), or a chip or circuit in the terminal device. Taking the terminal device as an example, the method includes:

[0007] receiving first information, wherein the first information is used for a random access procedure of a first feature;

[0008] When the first information does not include the first type of parameter information, performing uplink data transmission in the random access process of the first characteristic according to the second type of parameter information;

[0009] In a case where the first information includes parameter information of the first type, performing uplink data transmission in a random access process of the first characteristic according to the parameter information of the first type;

[0010] If the random access of the first characteristic is converted to the random access of the second characteristic, uplink data transmission in the random access process of the second characteristic is performed according to the parameter information of the third type.

[0011] In the embodiment of the present application, the first information not including the first type of parameter information may mean that the first information does not include parameter information instructing the UE (such as the first terminal) to perform random access of the first feature.

[0012] Exemplarily, the first information may be MsgA-ConfigCommon-r17. For example, the first information may be MsgA-ConfigCommon included in MsgA-ConfigCommon-r17. Correspondingly, the parameter information of the first type of random access may be MsgA-TransformPrecoder. The above-mentioned random access process for the first feature includes the UE (first terminal) sending or receiving information in the random access process. For example, the above-mentioned random access process for the first feature includes sending Msg3, MsgA, PRACH, or receiving Msg2, Msg4, MsgB.

[0013] When the UE performs a random access process under a characteristic or a specific device type, it is possible to use parameters of a non-characteristic or non-specific device type configured by the network device. For example, the current protocol stipulates that if the UE fails to attempt a two-step random access, it can fall back to a four-step random access process to perform a four-step random access. In this case, optionally, the parameter information of the random access of the second characteristic, and when the first information does not include the parameter information of the first type, the parameter information of the random access process of the first characteristic can be determined based on the parameter information of the second type.

[0014] However, it is considered that the UE may perform random access according to the value of the configured four-step random access parameter information (such as the second type of parameter information). It should be understood that the parameter information of the four-step random access here may be the parameter information of the four-step random access process under a non-characteristic or non-specific device type, but the UE that directly performs the four-step random access process under the relevant characteristics or specific device type may use the parameter information of the four-step random access process under the relevant characteristics or specific device type (such as the third type of parameter information). The parameter information of the four-step random access process under the non-characteristic or non-specific device type may be different from the parameter information of the four-step random access process under the relevant characteristics or specific device type. This will result in different parameters used by the UEs that perform the four-step random access process, and the network device does not know that the UE is converted from the two-step random access, and will detect according to the configuration parameters of the four-step random access process, which will result in deviations and cause reception failure. Exemplarily, if the above-mentioned parameter information is MsgA-TransformPrecoder, it may cause the network device to be unable to receive the information sent by the UE according to the precoding method expected to be used by the UE, thereby causing reception failure.

[0015] For example, the configuration information of the two-step random access of the R17 RedCap terminal device does not include the precoding method of MsgA. The terminal device determines the precoding method of MsgA in the two-step random access of the R17 RedCap terminal device according to the precoding method of Msg3 in the four-step random access configuration information of the R15 terminal device. After the terminal device switches from the two-step random access to the four-step random access process, if the R17 RedCap terminal device still uses the precoding method of Msg3 in the four-step random access configuration information of the R15 terminal device. The terminal device that directly initiates the R17 RedCap four-step random access uses the precoding method of Msg3 in the four-step random access configuration information of the R17 RedCap terminal device. If the precoding methods of R17 and R15 Msg3 are different, different terminal devices will use different precoding methods in the same random access process, and the network device will only receive according to one precoding method, so the parameters of the network device and one of the terminal devices will be inconsistent, resulting in reception failure. Therefore, in an optional implementation, the missing first type of parameter information in the random access process of the second feature can be determined based on the third type of parameter information, thereby improving the success rate of the UE's random access process of the second feature (the random access process of the second feature may include sending Msg3, PRACH, or receiving Msg2, Msg4), and ensuring the consistency of parameter understanding between the network device and the UE.

[0016] For another example, in the current protocol regulations, many parameters of the four-step random access in the random access configuration information of the network device must be configured, such as msg3-TransformPrecoder, which is used to indicate the precoding method of Msg3, while many parameters of the two-step random access are optional for the network device to configure, such as (first type of parameter information, the first type of parameter information may be MsgA-TransformPrecoder, which is used to indicate the precoding method of MsgAPUSCH). In order to avoid the problem of access failure due to missing parameters, the current solution is that if a parameter in the two-step random access is not configured, the UE can use the value of the same parameter in the four-step random access configuration to perform two-step random access. Based on this, in an optional implementation, the parameter information of the random access process of the first feature can be determined based on the parameter information corresponding to the characteristics / specific device type (including R15, R16, R17, i.e., characteristics and device types proposed later) of the random access process of the first feature. For example, if the random access process of the first feature belongs to the random access process of the first characteristic or the first terminal device type (including the above-mentioned multiple characteristics or specific device types), then the parameter information of the random access process of the first feature is determined according to the parameter information of the third type. If the random access process of the first feature is a random access process that does not include the above-mentioned multiple characteristics or specific device types, then the parameter information of the random access process of the first feature is determined according to the parameter information of the second type.

[0017] However, since the UE (first terminal) needs to perform a two-step random access process under a characteristic or a specific device type, the corresponding parameter values ​​in the four-step random access process are used. The parameters of the random access under the above-mentioned characteristic or specific device type may be different from the parameters of the random access under the non-characteristic, and the UE itself needs to determine whether it belongs to a random access process under a non-characteristic or non-specific device type or a random access process under a characteristic or specific device type, which increases the logical judgment process of the UE. Therefore, the embodiment of the present application clarifies that for such a situation, when the first information does not include the parameter information of the first type, the parameter information of the random access process of the first characteristic is determined according to the parameter information of the second type, so that the UE performs the random access process of the first characteristic without having to determine whether it belongs to a random access process under a non-characteristic or non-specific device type or a random access process under a characteristic or specific device type, which reduces the judgment logic of the terminal device on what type of random access process it belongs to. In addition, when the precoding parameters of the data channel (PUSCH, physical unlinkshared channel) are not configured, the protocol stipulates that the UE uses rach-ConfigCommon, that is, the configuration parameters in the 4-step RA defined in R15. The same logic adopted in the embodiment of the present application reduces the processing complexity of the terminal device and improves its response speed and access success rate, which is especially important for resource-constrained terminal devices (such as RedCap, eRedCap, etc.).

[0018] In an optional implementation, the random access process of the first feature and the random access process of the second feature belong to the random access process of the first feature or the first terminal device type; the first feature includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing, and the first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, Internet of Things terminal, or energy saving.

[0019] It should be understood that the first feature means that the above-mentioned current random access also extends to multiple characteristics or specific device types, and the corresponding parameter information is the parameter information of the random access process under the characteristics or specific device types.

[0020] Optionally, the coverage enhancement includes one or more of repeated transmission of Msg1, repeated transmission of Msg3, and repeated transmission of MsgA.

[0021] It should be noted that the above-mentioned first characteristic may also include one or more characteristics defined in R17 and later versions or characteristics defined in non-basic versions; the above-mentioned first terminal device type may also include a specific device type defined in R17 and later versions. It should be understood that the network device can identify the random access process of the first characteristic of the terminal device during the random access process.

[0022] In an optional implementation manner, the random access process of the first feature is a two-step random access process; the random access process of the second feature is a four-step random access process.

[0023] In an optional implementation, the first type includes the random access procedure of the first characteristic, and the third type includes the random access procedure of the second characteristic.

[0024] In the implementation mode of the present application, the first type includes the random access process of the first feature, and the third type includes the random access process of the second feature, so that the parameter configuration is clearer and more standardized. This helps the network device and the terminal device to accurately understand and apply the corresponding parameter configuration during the random access process, avoids access failures caused by inconsistent parameter understanding, and optimizes the utilization efficiency of network resources.

[0025] In an optional implementation, the first type is a two-step random access process of a first characteristic or a first terminal device type.

[0026] In an optional implementation, the second type is a four-step random access process of a broadband terminal device eMBB.

[0027] In an optional implementation, the third type is a four-step random access process of the first characteristic or the first terminal device type.

[0028] Optionally, the first type of parameter information is used to configure parameter information for a terminal device of the first characteristic or the first terminal device type to perform a two-step random access process. It can also be described as a terminal device of the first characteristic or the first terminal device type performing a two-step random access process according to the first type of parameter information. The third type of parameter information is used to configure parameter information for a terminal device of the first characteristic or the first terminal device type to perform a four-step random access process. It can also be described as a terminal device of the first characteristic or the first terminal device type performing a four-step random access process according to the third type of parameter information. The second type of parameter information is used to configure parameter information for a four-step random access process of a broadband terminal device eMBB. It can also be described as a broadband terminal device eMBB performing a four-step random access process according to the second type of parameter information.

[0029] In an optional implementation manner, the first information includes MsgA-ConfigCommon-r17.

[0030] In an optional implementation manner, the parameter information includes one or more of precoding information, power information or format information.

[0031] The implementation method of the present application improves the accuracy and reliability of information transmission by clarifying the key elements of parameter information including precoding information, power information or format information, and specific details such as the transmission precoding information of MsgA PUSCH and Msg3 PUSCH. This helps the network equipment to accurately receive and parse the uplink data from the terminal device, reducing the risk of transmission errors and access failures.

[0032] In an optional implementation manner, the parameter information includes precoding information;

[0033] The first type of parameter information is used to indicate a first precoding mode for uplink data transmission;

[0034] The second type of parameter information includes a first value or a second value, the first value is used to indicate the second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission;

[0035] The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for the uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used during the uplink data transmission.

[0036] Different values ​​in the second type of parameter information or the third type of parameter information can be used for different functions, respectively, to enable the first terminal to use the expected precoding method when performing uplink data transmission.

[0037] In an optional implementation manner, the parameter information includes precoding information, and the first type of parameter information includes transmission precoding information of MsgA PUSCH.

[0038] In an optional implementation, the second type of parameter information and the third type of parameter information include transmission precoding information of Msg3PUSCH.

[0039] In an optional implementation, the method further includes:

[0040] receiving second information, the second information including parameter information of a second type; and / or,

[0041] Third information is received, the third information including parameter information of a third type.

[0042] In an embodiment of the present application, the first information, the second information and the third information may be carried in the same signaling, or may be carried in different signalings. The first information and the second information may be carried in the first signaling, and the third information may be carried in the second signaling. The first information and the third information may be carried in the first signaling, and the second information may be carried in the second signaling. The first information may be carried in the first signaling, and the second information may be carried in the second signaling. The first information may be carried in the first signaling, and the second information and the third information may be carried in the second signaling. Carrying in the same signaling may be understood as being in the same signaling, or in signaling received at the same time. Optionally, the above-mentioned signaling is system information. For example, the signaling is a system information block. The system information may be system information block 1 (systeminformation block1, SIB1). Therefore, the above-mentioned action of receiving the second information and the action of receiving the third information may also be the same action, or may be different actions, and the present application does not limit this.

[0043] In an optional implementation manner, one or more of the first information, the second information and the third information are carried by the first signaling.

[0044] In an optional implementation manner, the first information is not directly included in the configuration information of the partial bandwidth BWP.

[0045] In an optional implementation manner, the second information is directly included in the configuration information of the partial bandwidth BWP.

[0046] In an optional implementation manner, the third information is not directly included in the configuration information of the partial bandwidth BWP.

[0047] In an optional implementation, the first information is included in configuration information of a random access procedure of the first feature.

[0048] In an optional implementation manner, the third information is included in configuration information of the random access procedure of the second feature.

[0049] It should be noted that the above-mentioned first information / third information is not directly included in the configuration information of the partial bandwidth BWP, which may mean that the first information / third information is nested in the configuration information of the partial bandwidth BWP. Exemplarily, the network device configures additional random access parameters for different characteristics or terminal types, and the AdditionalRACH-ConfigList includes multiple AdditionalRACH-Configs. Each AdditionalRACH-Config corresponds to a characteristic or terminal type. Each AdditionalRACH-Config may include rach-ConfigCommon and MsgA-ConfigCommon, and the rach-ConfigCommon and MsgA-ConfigCommon here are not directly included in the AdditionalRACH-ConfigList.

[0050] In a second aspect, the present application provides a communication method, the execution subject of the method may be a network device, or a chip or circuit in the network device. Taking the network device as an example, the method includes:

[0051] Sending first information to a first terminal;

[0052] In a case where the first information does not include the first type of parameter information, receiving uplink data transmitted in a random access process of a first feature performed by the first terminal according to the second type of parameter information;

[0053] In a case where the first information includes parameter information of the first type, receiving uplink data transmitted during the random access process of the first feature performed by the first terminal according to the parameter information of the first type;

[0054] If the first terminal converts from the random access of the first characteristic to the random access of the second characteristic, uplink data transmitted by the first terminal during the random access of the second characteristic according to the parameter information of the third type is received.

[0055] It should be understood that there is no time sequence relationship between the uplink data sent during the random access process of receiving the first characteristic and the uplink data sent during the random access process of receiving the second characteristic, and they may be received simultaneously.

[0056] The embodiments of the present application clarify the UE parameter selection in different scenarios, which improves the success rate of terminal devices accessing the network and the user experience, enables the communication system to better meet the diverse needs of different users, and ensures the consistency of parameter understanding between network equipment and UE.

[0057] In an optional implementation, the random access process of the first feature and the random access process of the second feature are both random access processes belonging to the first characteristic or the first terminal device type; the first characteristic includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing, and the first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, Internet of Things terminal, or energy saving.

[0058] In an optional implementation manner, the random access process of the first feature is a two-step random access process; the random access process of the second feature is a four-step random access process.

[0059] In an optional implementation, the first type includes the random access procedure of the first characteristic, and the third type includes the random access procedure of the second characteristic.

[0060] In an optional implementation, the first type is a two-step random access process of a first characteristic or a first terminal device type.

[0061] In an optional implementation, the second type is a four-step random access process of a broadband terminal device eMBB.

[0062] In an optional implementation, the third type is a four-step random access process of the first characteristic or the first terminal device type.

[0063] In an optional implementation manner, the first information includes MsgA-ConfigCommon-r17.

[0064] In an optional implementation manner, the parameter information includes one or more of precoding information, power information or format information.

[0065] In an optional implementation manner, the parameter information includes precoding information; the first type of parameter information is used to indicate a first precoding mode for uplink data transmission;

[0066] The second type of parameter information includes a first value or a second value, the first value is used to indicate a second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission;

[0067] The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used for uplink data transmission.

[0068] In an optional implementation, the parameter information includes precoding information, the first type of parameter information includes transmission precoding information of MsgA PUSCH, and the second type of parameter information and the third type of parameter information include transmission precoding information of Msg3 PUSCH.

[0069] In an optional implementation, the method further includes:

[0070] Sending second information to the first terminal, where the second information includes parameter information of a second type; and / or,

[0071] The third information is sent to the first terminal, where the third information includes parameter information of a third type.

[0072] In an optional implementation manner, one or more of the first information, the second information and the third information are carried by the first signaling.

[0073] In an optional implementation manner, the parameter information includes one or more of precoding information, power information or format information.

[0074] In an optional implementation manner, the first information is not directly included in the configuration information of the partial bandwidth BWP.

[0075] In an optional implementation manner, the second information is directly included in the configuration information of the partial bandwidth BWP.

[0076] In an optional implementation manner, the third information is not directly included in the configuration information of the partial bandwidth BWP.

[0077] In an optional implementation, the first information is included in configuration information of a random access procedure of the first feature.

[0078] In an optional implementation manner, the third information is included in configuration information of the random access procedure of the second feature.

[0079] In a third aspect, the present application provides a communication method, the execution subject of the method may be a terminal device, or a chip or circuit in the terminal device. Taking the terminal device as an example, the method includes:

[0080] receiving fourth information, the fourth information not including parameter information of the first type;

[0081] In a connected state and / or within the first resource, performing first uplink data transmission, parameter information of the first uplink data transmission is determined according to parameter information of the second type;

[0082] In the non-connected state and / or in the second resource, second uplink data transmission is performed, and parameter information of the second uplink data transmission is determined according to the parameter information of the first type.

[0083] In an embodiment of the present application, the uplink data transmission may be uplink data transmission in a random access process, or dedicated uplink data transmission scheduled by a network device. Dedicated uplink data transmission is uplink data transmission scheduled by a network device through dedicated signaling. For example, the first uplink data transmission is uplink data transmission in a random access process of the first characteristic.

[0084] It should be noted that the non-connected state includes an idle state or an inactive state.

[0085] In the embodiment of the present application, since the fourth information does not include the first type of parameter information, the terminal device does not need to perform logical judgment on which specific parameter information to use in the connected state or the first resource, thereby reducing energy consumption and speeding up the random access process. By clearly distinguishing the random access process in the connected state and the non-connected state (including the idle state and the inactive state), the terminal device can communicate effectively in different network states, thereby enhancing the robustness and stability of the communication system.

[0086] It should be understood that the network device can identify the random access process of the first characteristic of the terminal device during the random access process.

[0087] In an optional implementation manner, the first uplink data transmission is uplink data transmission in a random access procedure of a first characteristic.

[0088] It should be understood that the network device can identify the random access process of the first characteristic of the terminal device during the random access process.

[0089] In an optional implementation manner, the second uplink data transmission is uplink data transmission in a random access process of the first characteristic.

[0090] In an optional implementation manner, the first resource is a non-initial BWP or a dedicated BWP. The second resource is an initial BWP.

[0091] In an optional implementation, the first resource is an RRC-configured BWP (eg, an RRC-configured BWP), and the second resource is a non-RRC-configured BWP (eg, an RRC-configured BWP).

[0092] It should be noted that non-RRC-configured BWP is used to refer to resources other than RRC-configured BWP resources.

[0093] In a fourth aspect, the present application provides a communication method, the execution subject of the method may be a network device, or a chip or circuit in the network device. Taking a terminal device as an example, the method includes:

[0094] sending fourth information, where the fourth information does not include parameter information of the first type;

[0095] When the first terminal is in a connected state and / or in a first resource, receiving uplink data in a first uplink data transmission performed by the first terminal, where parameter information of the first uplink data transmission is determined by the first terminal according to parameter information of the second type;

[0096] When the first terminal is in a non-connected state and / or in a second resource, uplink data in a second uplink data transmission performed by the first terminal is received, and parameter information of the second uplink data transmission is determined by the first terminal according to parameter information of the first type.

[0097] By clearly distinguishing the random access process in the connected state and the non-connected state (including the idle state and the inactive state), the network equipment can determine the parameter information adopted by the terminal device in different network states (for example, the network equipment can determine the value of the parameter information adopted by the terminal device in different network states), thereby enhancing the robustness and stability of the communication system and ensuring the consistency of the network equipment and the UE's understanding of the parameters.

[0098] In an optional implementation manner, the first uplink data transmission is uplink data transmission in a random access procedure of a first characteristic.

[0099] In an optional implementation manner, the second uplink data transmission is uplink data transmission in a random access process of the first characteristic.

[0100] In an optional implementation manner, the first resource is a non-initial BWP or a dedicated BWP. The second resource is an initial BWP.

[0101] In an optional implementation, the first resource is an RRC-configured BWP (eg, an RRC-configured BWP), and the second resource is a non-RRC-configured BWP (eg, an RRC-configured BWP).

[0102] In a fifth aspect, a communication device is provided for implementing various methods. The communication device may be the first terminal in the first aspect or the third aspect, or a device included in the first terminal, such as a chip or a chip system; or, the communication device may be the network device in the second aspect or the fourth aspect, or a device included in the network device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the implementation method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes one or more modules or units corresponding to the functions.

[0103] In some possible designs, the communication device may include a processing module and a transceiver module. The processing module may be used to implement the processing function in any of the above aspects and any possible implementations thereof. The transceiver module may include a receiving module and a sending module, respectively used to implement the receiving function and the sending function in any of the above aspects and any possible implementations thereof.

[0104] In some possible designs, the transceiver module may be composed of a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0105] In a sixth aspect, a communication device is provided, comprising: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the communication device executes the method described in any aspect. The communication device can be the first terminal in the first aspect or the third aspect, or a device included in the first terminal, such as a chip or a chip system; or the communication device can be the network device in the second aspect or the fourth aspect, or a device included in the network device, such as a chip or a chip system.

[0106] In a seventh aspect, a communication device is provided, comprising: a processor and a communication interface; the communication interface is used to communicate with a module outside the communication device; the processor is used to execute a computer program or instruction so that the communication device executes the method described in any aspect. The communication device can be the first terminal in the first aspect or the third aspect, or a device included in the first terminal, such as a chip or a chip system; or the communication device can be the network device in the second aspect or the fourth aspect, or a device included in the network device, such as a chip or a chip system.

[0107] In an eighth aspect, a communication device is provided, comprising: at least one processor; the processor is used to execute a computer program or instruction stored in a memory so that the communication device performs the method described in any aspect. The memory may be coupled to the processor, or may be independent of the processor. The communication device may be the first terminal in the first aspect or the third aspect, or a device included in the first terminal, such as a chip or a chip system; or the communication device may be the network device in the second aspect or the fourth aspect, or a device included in the network device, such as a chip or a chip system.

[0108] In a ninth aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored, and when the computer-readable storage medium is run on a communication device, the communication device can execute the method described in any one of the aspects.

[0109] In a tenth aspect, a computer program product comprising instructions is provided, which, when executed on a communication device, enables the communication device to execute the method described in any one of the aspects.

[0110] In an eleventh aspect, a communication device (for example, the communication device may be a chip or a chip system) is provided, wherein the communication device includes a processor for implementing the functions involved in any aspect.

[0111] In some possible designs, the communication device includes a memory for storing necessary program instructions and data.

[0112] In some possible designs, when the device is a chip system, it can be composed of a chip or include a chip and other discrete devices.

[0113] In the twelfth aspect, a communication system is provided, which includes at least a first terminal and a network device, the first terminal is used to implement the real-time method of the first aspect or any one of the first aspects, or to implement the method of the third aspect or any one of the third aspects, and the network device is used to implement the method as described in the second aspect or any one of the second aspects, or to implement the method as described in the fourth aspect or any one of the fourth aspects.

[0114] It can be understood that when the communication device provided in any one of the fifth to twelfth aspects is a chip, the sending action / function of the communication device can be understood as output information, and the receiving action / function of the communication device can be understood as input information.

[0115] Among them, the technical effects brought about by any design method in the fifth to twelfth aspects can refer to the technical effects brought about by different design methods in the first aspect, the second aspect, the third aspect or the fourth aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0116] Figure 1 A flowchart of a four-step random access method provided in an embodiment of the present application;

[0117] Figure 2 A schematic diagram of a two-step random access method provided in an embodiment of the present application;

[0118] Figure 3 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0119] Figure 4 A flow chart of a communication method provided in an embodiment of the present application;

[0120] Figure 5 A flow chart of a communication method provided in an embodiment of the present application;

[0121] Figure 6 is a structural diagram of a communication device provided in an embodiment of the present application;

[0122] Figure 7 It is a structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0123] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0124] 1) Terminal equipment, which can be a device with wireless transceiver function or a chip that can be set in any device, can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication equipment, user agent or user device. The terminal equipment in the embodiment of the present application can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, an XR device (such as VR device, AR device, MR device, etc.), a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in video surveillance, and a wearable terminal device. The terminal equipment can also be an eMBB UE, a URLLC UE, a drone, other Internet of Things (IoT) devices, a positioning device, etc.

[0125] The network device may be a device for realizing the functions of the access network device. The access network device may refer to a device in the access network that communicates with the wireless terminal device through one or more cells at the air interface, for example, it may be a next generation base station (next Generation node B, gNB) in the NR system, or an evolutionary base station (evolutional node B, eNB) in the long term evolution (long term evolution, LTE) system. The network device may also be a device that can support the network device to realize the functions of the access network device, such as a chip system, which may be installed in the network device.

[0126] 2) The random access process includes the contention-based random access (CBRA) process and the non-contention random access (CFRA) process. Taking the CBRA process as an example, the random access process is described as follows:

[0127] The CBRA process can be completed through a four-step random access channel (RACH) or a two-step random access.

[0128] refer to Figure 1 , Figure 1 A schematic diagram of a flow chart of a four-step random access method provided in an embodiment of the present application, wherein the two-step random access process includes:

[0129] Step S101: A terminal device sends a random access request message to a network device, and the network device receives the random access request message from the terminal device. The random access request message may also be referred to as a first message (Msg1), which includes a random access preamble.

[0130] Step S102: The network device sends a random access response (RAR) message to the terminal device, and the terminal device receives the RAR message from the network device. The RAR message may also be referred to as a second message (Msg2).

[0131] Step S103: The terminal device sends scheduled transmission information to the network device, and the network device receives the scheduled transmission information from the terminal device. The message carrying the scheduled transmission information is called the third message (Msg3).

[0132] After receiving the RAR message, the terminal device transmits the message based on the scheduling of the RAR message. Specifically, the terminal device may send Msg3 via a physical uplink shared channel (PUSCH) scheduled by the RAR UL grant carried in the first RAR.

[0133] Step S104: The network device sends contention resolution information to the terminal device. The message carrying the contention resolution information is called a fourth message (Mg4). The terminal device receives Msg4 from the network device and can obtain the contention resolution information.

[0134] The above is a four-step random access, and the following is a two-step random access. Figure 2 , Figure 2 A schematic diagram of a two-step random access method provided in an embodiment of the present application, wherein the two-step random access method includes:

[0135] Step S201: The terminal device sends a message A (MsgA) to the network device, and the network device receives the MsgA from the terminal device.

[0136] The terminal device selects a Msg A resource from the public Msg A resources broadcast by the network device and sends Msg A through the Msg A resource. The Msg A resource includes resources (time-frequency codes) for sending preamble and corresponding PUSCH resources. Msg A also includes two parts, one is preamble and the other is PUSCH payload.

[0137] The MsgA message can be considered to include the content included in the preamble and Msg3 in the four-step random access.

[0138] Step S202: The network device sends a message B (MsgB) to the terminal device, and the terminal device receives MsgB from the network device.

[0139] MsgB may include contention resolution information and the content included in the RAR message in the 4-step RACH.

[0140] The terms "system" and "network" in the embodiments of the present application can be used interchangeably. In the embodiments of the present application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0141] Furthermore, unless otherwise specified, ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance of the multiple objects. For example, the first physical random access channel and the second physical random access channel are only used to distinguish different physical random access channels, and do not indicate the difference in the sending order, content, priority or importance of the two physical random access channels.

[0142] Since the parameters of the random access process under characteristics or specific equipment types may be different from the parameters of the random access process under non-characteristics or non-specific equipment types, even when the UE performs a random access process under the relevant characteristics or specific equipment types, it is possible that the parameters of the non-characteristics or specific equipment types configured by the network equipment are used. This leads to a difference between the parameters expected by the network equipment side to be used by the UE and the parameters actually used by the UE, resulting in the failure of UE random access.

[0143] Two scenarios are introduced below. Scenario 1: If the UE fails in attempting a two-step random access under a characteristic or a specific device type, it may fall back to a four-step random access process under a characteristic or a specific device type for four-step random access. The UE performs four-step random access according to the value of the configured four-step random access parameter information (which may be parameter information of a four-step random access process under a non-characteristic or non-specific device type).

[0144] Since the network device does not know that the UE is switching from a two-step random access, it will detect according to the expected characteristics or parameter information of the four-step random access process under a specific device type, resulting in reception failure.

[0145] Scenario 2, the protocol allows that if a parameter in the two-step random access is not configured, the UE can use the value of the same parameter in the four-step random access configuration to perform two-step random access. If the UE (first terminal) wants to perform a two-step random access process under a characteristic or a specific device type, since the parameters of the random access under the above-mentioned characteristic or specific device type may be different from the parameters of the random access under a non-characteristic or non-specific device type, in order to ensure that the parameter information used is consistent with the network device's estimation, the UE needs to determine whether it belongs to a random access process under a non-characteristic or non-specific device type or a random access process under a characteristic or specific device type, which increases the terminal device's judgment logic for what type of random access process it belongs to.

[0146] In both of the above scenarios, there is a situation where the terminal device and the network device have inconsistent understanding of parameters.

[0147] Based on this, the embodiments of the present application provide a communication method, a communication device, and a communication system for ensuring the consistency of parameter understanding between network equipment and terminal equipment, and avoiding the increase of complexity of UE or process. Among them, the method and the device are based on the same inventive concept. Since the principles of solving problems by the method and the device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.

[0148] The communication method provided in this application can be applied to various communication systems, for example, it can be the Internet of Things (IoT), narrowband Internet of Things (NB-IoT), long term evolution (LTE), it can also be a fifth generation (5G) communication system, it can also be a hybrid architecture of LTE and 5G, it can also be a 5G new radio (NR) system, and 6G or new communication systems that will appear in the future communication development. The 5G communication system described in this application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (SA) 5G communication system. The communication system can also be a machine to machine (M2M) network or other network.

[0149] A schematic diagram of the architecture of a mobile communication system used in an embodiment of the present application is shown in FIG. Figure 3 As shown, Figure 3 The present invention provides a schematic diagram of the architecture of a communication system, wherein the communication system includes a core network device 110, a wireless access network device 120 and at least one terminal device (such as Figure 3The terminal device 130 and the terminal device 140 in the figure are connected to the wireless access network device by wireless means, and the wireless access network device is connected to the core network device by wireless or wired means. The core network device and the wireless access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated on the same physical device, or part of the functions of the core network device and part of the functions of the wireless access network device can be integrated on one physical device. The terminal device can be fixed or movable. Figure 3 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 3 The embodiments of the present application do not limit the number of core network devices, wireless access network devices and terminal devices included in the communication system.

[0150] The wireless access network device is an access device that the terminal device uses to access the communication system wirelessly. It can be a base station NodeB, an evolved base station (Evolved Node B, eNodeB), a base station in a 5G communication system, a base station in a future communication system, or an access node in a WiFi system, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device.

[0151] The terminal device may also be referred to as a terminal, a user equipment UE, a mobile station (MS), a mobile terminal (MT), etc. The terminal device may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The terminal device 130 and / or the terminal device 140 is the first terminal in the embodiment of the present application.

[0152] The wireless access network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and satellites in the air. The embodiments of the present application do not limit the application scenarios of the wireless access network equipment and terminal equipment.

[0153] The embodiments of the present application may be applicable to downlink signal transmission, uplink signal transmission, and device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is a wireless access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is a wireless access network device. For D2D signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is also a terminal device. The embodiments of the present application do not limit the transmission direction of the signal.

[0154] The wireless access network equipment and the terminal equipment, as well as the terminal equipment and the terminal equipment, can communicate through the licensed spectrum, or can communicate through the unlicensed spectrum, or can communicate through the licensed spectrum and the unlicensed spectrum at the same time. The wireless access network equipment and the terminal equipment, as well as the terminal equipment and the terminal equipment, can communicate through the spectrum below 6G, or can communicate through the spectrum above 6G, or can communicate through the spectrum below 6G and the spectrum above 6G at the same time. The embodiments of the present application do not limit the spectrum resources used between the wireless access network equipment and the terminal equipment.

[0155] The technical solution in the embodiment of the present application will be described below in conjunction with the accompanying drawings in the embodiment of the present application. For ease of introduction, the method is described below by taking the network device and the first terminal device as an example.

[0156] See also Figure 4 , Figure 4 A flow chart of a communication method provided in an embodiment of the present application is provided. Figure 4 The method shown may include steps S401 to S404. The method may be applied to any communication system applicable to the present application in the above description. Exemplarily, the present application embodiment takes the method applied to a communication system including a terminal device and a network device as an example for explanation. Specifically, the communication system includes a first terminal and a network device. It should be noted that Figure 4Step S402, step S403 and step S404 in the method shown are parallel schemes, which means that step S402, step S403 and step S404 can be implemented separately, and there is no sequence relationship among the three. If step S402, step S403 and step S404 occur on different terminal devices respectively, then the corresponding contents of step S402, step S403 and step S404 can be implemented simultaneously.

[0157] It should be understood that step S402, step S403 and step S404 involve three situations in total, namely:

[0158] Case 1: When the first information does not include the first type of parameter information, the first terminal performs uplink data transmission in the random access process of the first characteristic according to the second type of parameter information.

[0159] Case 2: When the first information includes parameter information of the first type, the first terminal performs uplink data transmission in a random access process of the first characteristic according to the parameter information of the first type.

[0160] Case 3, when converting from the random access of the first feature to the random access of the second feature, the first terminal performs uplink data transmission in the random access process of the second feature according to the third type of parameter information.

[0161] The above three situations can be realized separately without any order. If the above three situations occur on different terminal devices respectively, the above three situations can be realized at the same time.

[0162] The conversion from the random access of the first feature to the random access of the second feature can be understood as converting to the random access of the second feature after the random access process of the first feature fails.

[0163] Figure 4 The method is specifically as follows:

[0164] Step S401: The network device sends first information to the first terminal. Correspondingly, the first terminal receives the first information from the network device.

[0165] Optionally, the first information is used for a random access process of the first characteristic.

[0166] Optionally, the first information is information included in the system information sent by the network device in a specific bandwidth resource. The system information may be system information block 1 (system information block 1, SIB1). Accordingly, the above-mentioned sending action may refer to the related action of the system information sent by the network device in a specific bandwidth resource, and the above-mentioned receiving action may refer to the related action of the first terminal searching for system information in a specific bandwidth resource. Optionally, the above-mentioned network device sending the first information to the first terminal may refer to the network device sending the first information by broadcasting or other means, and the first terminal receiving the first information.

[0167] It should be noted that the first information may be random access configuration information configured by the network device for the terminal device (such as the first terminal), specifically a random access process for the first feature, or may be partial information in the random access configuration information configured by the network device for the terminal device (such as the first terminal).

[0168] Optionally, the first information is not directly included in the configuration information of the partial bandwidth BWP. In an embodiment of the present application, the first information is not directly included in the BWP configuration information means that the first information is included in AdditionalRACH-ConfigList or AdditionalRACH-Config. Optionally, the first information may be rach-ConfigCommon-17 or rach-ConfigCommon-18, or a random access configuration defined after version R17. Optionally, the first information may be MsgA-ConfigCommon-r17, or may be MsgA-ConfigCommon included in MsgA-ConfigCommon-r17, or may be included in additionalRACH-ConfigList or AdditionalRACH-Config-17 or AdditionalRACH-Config. The following embodiment of the present application takes the first information as MsgA-ConfigCommon included in MsgA-ConfigCommon-r17 as an example for explanation. It should be understood that this does not represent a limitation on the first information.

[0169] It should be noted that the first information is MsgA-ConfigCommon included in MsgA-ConfigCommon-r17, which indicates that the first information is included in the parameter information of the random access process of the first characteristic.

[0170] Optionally, the random access process of the first feature belongs to the random access process of the first characteristic or the first terminal device type. The first feature includes the first feature or the first terminal device type. The first feature includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing. The first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, IoT terminal or energy saving. It should be understood that the first feature means that the above-mentioned current random access also extends to a variety of characteristics or specific device types, and the corresponding parameter information is the parameter information of the random access process under the characteristics or specific device types. In addition, the above-mentioned first characteristic may also include one or more of the characteristics defined in R17 and later versions or the characteristics defined in non-basic versions; the above-mentioned first terminal device type may also include a specific device type defined in R17 and later versions. It should be understood that the network device can identify the random access process of the first characteristic of the terminal device during the random access process.

[0171] Step S402: When the first information does not include the first type of parameter information, the first terminal performs uplink data transmission in the random access process of the first characteristic according to the second type of parameter information.

[0172] Correspondingly, the network device receives uplink data sent by the first terminal during the random access process of the first characteristic according to the second type of parameter information.

[0173] In the embodiments of the present application, transmission can be understood as receiving, sending, encoding, decoding, modulation, demodulation, precoding, and pre-demodulation.

[0174] The random access process in the embodiment of the present application includes the first terminal sending or receiving information in the random access process. For example, the random access process of the first feature includes the first terminal sending Msg3 and PRACH, and the first terminal receiving Msg2 and Msg4.

[0175] It should be noted that many parameters of the four-step random access in the random access configuration information configured by the network device for the first terminal must be configured, such as msg3-TransformPrecoder, which is used to indicate the precoding method of Msg3, while many parameters of the two-step random access are optional for the network device to configure, such as (first type of parameter information, the first type of parameter information may be MsgA-TransformPrecoder, which is used to indicate the precoding method of MsgA PUSCH). Therefore, there is a situation where the first information does not include the first type of parameter information.

[0176] In an optional implementation, the first type includes a random access process of the first feature. Specifically, the first type includes a two-step random access process of the first feature. Accordingly, the parameter information of the first type may be parameter information of the two-step random access process of the first feature.

[0177] It should be understood that the network device can identify the random access process of the first characteristic of the terminal device during the random access process.

[0178] It should be understood that the first information not including the first type of parameter information may mean that the first information does not include parameter information instructing the first terminal to perform the first type of random access. It may also mean that the first information does not include the value of the first type of parameter information, or the terminal device cannot determine the value of the first type of parameter information based on the first information.

[0179] It should be understood that if the first information is MsgA-ConfigCommon included in MsgA-ConfigCommon-r17, the random access process of the first feature can be a random access process under the first characteristic or the first terminal device type. Optionally, the random access process of the first feature can be a two-step random access process of the first feature.

[0180] In the present invention, "including" may be understood as "is" or "is equivalent to".

[0181] In an optional implementation, the parameter information of the random access process of the first feature may be determined based on the parameter information corresponding to the characteristics of the random access process of the first feature (including R15, R16, R17, i.e., characteristics and device types proposed later). For example, if the random access process of the first feature is a random access process under the first characteristic or the first terminal device type, the parameter information of the random access process of the first feature is determined based on the parameter information of the third type. If the random access process of the first feature is a random access process under a non-first characteristic or non-first terminal device type (excluding the above-mentioned multiple characteristics or specific device types), the parameter information of the random access process of the first feature is determined based on the parameter information of the second type.

[0182] However, since the UE (first terminal) needs to perform a two-step random access process under the first characteristic or non-first terminal device type, the corresponding parameter values ​​in the four-step random access process are used. The parameters of the random access under the above-mentioned characteristic or specific device type may be different from the parameters of the random access under the non-characteristic. The UE itself needs to determine whether it belongs to a random access process under a non-characteristic or non-specific device type or a random access process under a characteristic or specific device type, which increases the logical judgment process of the UE. In an optional implementation, the specific execution action of uplink data transmission in the random access process of the first characteristic according to the second type of parameter information may include: the parameter information of the random access process of the first characteristic is determined according to the second type of parameter information. The second type of parameter information may be parameter information of a random access process under a non-first characteristic or non-first terminal device type (for example, a broadband terminal device eMBB), such as msg3-TransformPrecoder in random access under a non-first characteristic or non-first terminal device type. For example, msg3-TransformPrecoder in random access under a non-first characteristic or non-first terminal device type is a configuration parameter in the four-step random access defined by R15. Optionally, the second type is used to characterize the type corresponding to the random access process under non-first characteristics or non-first terminal device types. Optionally, the second type is a four-step random access process of a broadband terminal device eMBB.

[0183] Optionally, the second type of parameter information is acquired by the first terminal based on the second information. Figure 4 The method shown may also include: the network device sends the second information to the first terminal, and correspondingly, the first terminal receives the second information from the network device. The first information and the second information may be carried in the same signaling, or may be carried in different signalings, which is not limited in this application. Carrying in the same signaling can be understood as in the same signaling, or in signaling received at the same time. Optionally, the above-mentioned signaling is system information, such as a system information block, and the system information may be system information block 1 (system information block 1, SIB1). Therefore, the above-mentioned action of receiving the second information and the action of receiving the first information may be the same action, or may be different actions, which is also not limited in this application.

[0184] Optionally, the second information is directly included in the configuration information of the partial bandwidth BWP. In the embodiment of the present application, the second information is directly included in the configuration information of the partial bandwidth BWP, which means that the second information is included in rach-ConfigCommon or rach-ConfigCommonIAB-r16.

[0185] Optionally, the parameter information of the random access process of the first feature is determined according to the parameter information of the second type, which specifically means that the value of the first type of parameter information (parameter information of the random access process of the first feature) is determined according to the value of the second type of parameter information. The current protocol stipulates that if a parameter in the two-step random access is not configured, the UE can use the value of the same parameter in the four-step random access configuration to perform two-step random access. Exemplarily, if the value of the second type of parameter information is 10, the first terminal takes the value of the first type of parameter information as 10. Exemplarily, if the second type of parameter information (msg3-TransformPrecoder) is configured to enable, the first terminal also enables the first type of parameter information (MsgA-TransformPrecoder). In addition, when the precoding parameters of the data channel (PUSCH, physical unlink shared channel) are not configured, the protocol stipulates that the terminal device uses rach-ConfigCommon, that is, the configuration parameters in the four-step random access defined in R15. Therefore, the embodiment of the present application adopts multiplexing logic, and determines the value of the first type of parameter information according to the second type of parameter information according to the processing method specified in the protocol when the precoding parameters of the data channel (PUSCH, physical unlink shared channel) are not configured. There is no need to judge whether it belongs to a random access process under a non-first characteristic or non-first terminal device type or a random access process of the first feature, which effectively reduces the processing logic flow of the first terminal for such situations, thereby reducing energy consumption, which is even more important for resource-constrained terminal devices (such as RedCap, eRedCap, etc.).

[0186] In an optional implementation manner, the parameter information includes one or more of precoding information, power information or format information.

[0187] Optionally, the precoding information may refer to transmission precoding information in the random access process, such as transmission precoding information of MsgA, transmission precoding information of Msg3, and transmission precoding information of a data channel. The precoding information may be TransformPrecoder.

[0188] Optionally, the power information may refer to power information in a random access process, such as power information of MsgA, power information of Msg3, and power information of a data channel. The power information may be a transmit power or a ramp power step.

[0189] Optionally, the format information may be format information in a random access process, such as format information of Msg3, format information of MsgA, and format information of a data channel. The format information may be a signaling format, and illustratively, the signaling format includes one or more of the fields included in the signaling, the length of each field, the position, the scrambling method, the modulation method, the coding method, the check method, and the like.

[0190] In an optional implementation, the parameter information includes precoding information; the first type of parameter information is used to indicate a first precoding mode for uplink data transmission. The second type of parameter information includes a first value or a second value, the first value is used to indicate a second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission. The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used during uplink data transmission. It should be understood that the first precoding mode, the second precoding mode and the third precoding mode may be the same. The first value and the second value may refer to the values ​​in a specific field of the precoding information in the second type of parameter information. Exemplarily, if the value of the specific field is the first value. Accordingly, the second type of parameter information also includes the second precoding mode. For example, the field after the specific field includes relevant information about the second precoding mode. Then the second precoding mode is used. If the value of the specific field is the second value. Accordingly, the second type of parameter information does not include the second precoding mode. For example, if the field after the specific field does not include relevant information of the second precoding mode, the second precoding mode is not used. The application of the third value and the fourth value is similar to the application of the first value and the second value, and will not be repeated here.

[0191] In an optional implementation, the parameter information includes precoding information, the first type of parameter information includes transmission precoding information of MsgA PUSCH, and the second type of parameter information and the third type of parameter information include transmission precoding information of Msg3 PUSCH.

[0192] Step S403: When the first information includes parameter information of the first type, the first terminal performs uplink data transmission in a random access process of the first characteristic according to the parameter information of the first type.

[0193] Correspondingly, the network device receives uplink data transmitted by the first terminal during a random access process of the first characteristic according to the first type of parameter information.

[0194] The random access process of the first characteristic in step S403 is a two-step random access process.

[0195] In this embodiment of the present application, the parameter information of the random access process of the first characteristic in step S403 is determined according to the parameter information of the first type.

[0196] Step S404: If the random access of the first characteristic is converted to the random access of the second characteristic, the first terminal performs uplink data transmission in the random access process of the second characteristic according to the parameter information of the third type.

[0197] Correspondingly, if the random access of the first characteristic is converted to the random access of the second characteristic, the network device receives the uplink data transmitted by the first terminal during the random access of the second characteristic according to the parameter information of the third type.

[0198] In an optional implementation, the first type includes the random access process of the first characteristic, and the random access process of the second characteristic is a four-step random access process.

[0199] In this step, if the random access process of the first feature is successful, the network device receives the uplink information / data sent by the first terminal in the random access process of the first feature; if the random access process of the first feature fails, the first terminal performs the random access process of the second feature, and the network device receives the uplink information sent by the first terminal in the random access process of the second feature. Since the network device has no perception of the fallback of the first terminal, there is no order of the random access process of the first feature and the random access process of the second feature. If the random access process of the first feature and the random access process of the second feature occur on different terminal devices, the random access process of the first feature and the random access process of the second feature can occur simultaneously.

[0200] When the terminal device performs the random access process of the first characteristic, it is possible to adopt the value of parameter information of a non-first characteristic or non-first terminal device type configured by the network device. For example, the current protocol stipulates that if the terminal device fails in attempting two-step random access, it can fall back to a four-step random access process to perform four-step random access. To ensure consistency in parameter understanding between the network device and the terminal device, in an optional implementation manner, the parameter information of the random access of the second characteristic and the parameter information of the random access process of the first characteristic are both determined based on the parameter information of the second type when the first information does not include the parameter information of the first type.

[0201] However, considering that the UE may perform random access according to the value of the configured four-step random access parameter information (such as the second type of parameter information), it should be understood that the four-step random access parameter information here may be the parameter information of the four-step random access process under a non-characteristic or non-specific device type, but the UE that directly performs the four-step random access process under the relevant characteristics or specific device type may use the parameter information of the four-step random access process under the relevant characteristics or specific device type (such as the third type of parameter information) The value, this is undoubtedly different from the parameter information of the four-step random access process under non-characteristics or non-specific device types (for example, non-first characteristics or non-first device types) and the parameter information of the four-step random access process under the relevant characteristics or specific device types. There is a situation where the parameters used by the UEs performing the four-step random access process are different, and the network device does not know that the UE is converted from two-step random access, and will detect according to the configuration parameters of the four-step random access process, which will cause deviations and lead to reception failure. Exemplarily, if the above parameter information is MsgA-TransformPrecoder, it may cause the network device to be unable to receive information sent by the UE according to the pre-demodulation method corresponding to the pre-coding method expected to be used by the UE, thereby causing reception failure.

[0202] Therefore, in the embodiment of the present application, the first terminal performs uplink data transmission in the random access process of the second feature according to the third type of parameter information. In other words, the parameter information of the random access process of the second feature can be determined according to the third type of parameter information. The first type of parameter information missing from the terminal device is determined by the third type of parameter information, thereby improving the success rate of the random access process of the second feature of the UE (the random access process of the second feature may include sending Msg3, PRACH, or receiving Msg2, Msg4), and ensuring the consistency of the network device and the UE in understanding the parameters.

[0203] Optionally, the third type includes the random access process of the second feature, and accordingly, the parameter information of the third type may include parameter information of the four-step random access process of the first feature.

[0204] The third type of parameter information for determining the parameter information of the random access process of the second feature is obtained according to the third information. Figure 4 The method shown may further include: the network device sends third information to the first terminal, and correspondingly, the first terminal receives the third information from the network device.

[0205] In an optional implementation manner, the third information is not directly included in the configuration information of the partial bandwidth BWP. The possible implementation of “not directly included” here can be found in Figure 4 The relevant description in will not be repeated here.

[0206] In an optional implementation manner, the third information is included in configuration information of the random access procedure of the second feature.

[0207] In an embodiment of the present application, the first information, the second information and the third information may be carried in the same signaling, or in different signalings. The first information and the second information may be carried in the first signaling, and the third information may be carried in the second signaling. The first information and the third information may be carried in the first signaling, and the second information may be carried in the second signaling. The first information may be carried in the first signaling, and the second information may be carried in the second signaling. The present application does not limit this.

[0208] The embodiment of the present application determines the missing first type of parameter information of the terminal device through the third type of parameter information, so that the terminal device performs the random access process of the second feature (the random access process of the second feature may include sending Msg3, PRACH, or receiving Msg2, Msg4), ensuring the consistency of the network device and the UE's understanding of the parameters; and in the case where the first information does not include the first type of parameter information, the parameter information of the random access process of the first feature is determined according to the second type of parameter information, so that the terminal device performs the random access process of the first feature, without having to judge whether it belongs to a random access process under a non-first characteristic or non-first terminal device type or a random access process of the first feature, reducing the terminal device's judgment logic flow on what type of random access process it belongs to. In addition, when the precoding parameters of the data channel are not configured, the protocol stipulates that the terminal device uses rach-ConfigCommon. The same logic adopted in the embodiment of the present application reduces the processing complexity of the terminal device, improves its response speed and access success rate, and is especially important for resource-constrained terminal devices (such as RedCap, eRedCap, etc.).

[0209] Furthermore, in order to further improve the consistency of the understanding of parameters between the terminal device and the network device, this application also proposes a solution for how the terminal device determines the parameters in different situations. For details, please refer to Figure 5 , Figure 5 A flow chart of a communication method provided in an embodiment of the present application is provided. Figure 5 The method shown includes step S501, step S502 and step S503; the method can be applied to any communication system applicable to the present application in the above description. Exemplarily, the present application embodiment takes the method applied to a communication system including a terminal device and a network device as an example for explanation. Specifically, the communication system includes a first terminal and a network device. It should be noted that Figure 5Step S502 and step S503 in the method shown are parallel solutions, which means that step S502 and step S503 can be implemented independently, and there is no sequence relationship between the two. If step S502 and step S503 occur on different terminal devices respectively, step S502 and step S503 can be implemented simultaneously.

[0210] It should be understood that step S502 and step S503 involve a total of 6 situations, namely:

[0211] Case 4: When the first terminal is in a connected state, the first terminal performs first uplink data transmission according to the second type of parameter information.

[0212] Case 5: The first terminal performs first uplink data transmission in the first resource according to the second type of parameter information.

[0213] Case 6: When in a connected state, the first terminal performs a first uplink data transmission in the first resource according to the second type of parameter information.

[0214] Case 7: When the first terminal is in a non-connected state, the first terminal performs second uplink data transmission according to the first type of parameter information.

[0215] In case 8, the first terminal performs second uplink data transmission in the second resource according to the first type of parameter information.

[0216] Case 9: When in a non-connected state, the first terminal performs a second uplink data transmission in the second resource according to the first type of parameter information.

[0217] The above 6 situations can be implemented separately without any order. If the above 6 situations occur on different terminal devices, the above 6 situations can be implemented simultaneously. It should be understood that situations 4 and 5 belong to parallel solutions, and situation 6 is a special case, which is a lower-level solution of situation 4 and situation 5, and is the intersection of situation 4 and situation 5. The same is true for situation 9, which is a lower-level solution of situation 7 and situation 8. In the specific implementation process, the solution of situation 4 / situation 5 can be understood as covering the solution of situation 6, and the solution of situation 7 / situation 8 can be understood as covering the solution of situation 9.

[0218] Figure 5 The methods shown are as follows:

[0219] Step S501: The network device sends fourth information to the first terminal. Correspondingly, the first terminal receives the fourth information from the network device.

[0220] In the embodiment of the present application, the fourth information does not include the first type of parameter information. The first type of parameter information and the possible implementation of "not included" can be found in Figure 4 The relevant contents in step S402 of the corresponding method will not be repeated here.

[0221] Optionally, the fourth information is information included in the system information sent by the network device in the specific bandwidth resource. The system information may be system information block 1. Accordingly, the above-mentioned sending action may refer to the related action of the system information sent by the network device in the specific bandwidth resource, and the above-mentioned receiving action may refer to the related action of the first terminal searching for the system information in the specific bandwidth resource. Optionally, the above-mentioned network device sending the fourth information to the first terminal may refer to the network device sending the fourth information by broadcasting or other means, and the first terminal receiving the fourth information.

[0222] It should be noted that other possible implementations of the “fourth information” can be found in Figure 4 The relevant content of the "first information" in step S401 of the corresponding method will not be repeated here.

[0223] Step S502: The first terminal performs a first uplink data transmission in a connected state and / or in a first resource according to the second type of parameter information. Accordingly, the network device receives uplink data in the first uplink data transmission performed by the first terminal.

[0224] In cases 4, 5 and 6 corresponding to step S502, if the first terminal transmits uplink data in a random access process of a first characteristic according to the second type of parameter information within the first resource, the network device can receive the uplink data of the first transmission performed by the first terminal according to the second type of parameter information within the first resource.

[0225] In this step, the parameter information of the first uplink data transmission is determined by the first terminal according to the second type of parameter information. The possible implementation of the "second type of parameter information" can be referred to Figure 4 The relevant contents in step S402 of the corresponding method will not be repeated here.

[0226] In an optional implementation, the first resource is a non-initial BWP or a dedicated BWP. The initial BWP is used for the initial random access of the terminal device and may include an initial downlink BWP and an initial uplink BWP. It can be understood that during the initial random access process of the terminal device, the terminal device can transmit signals or perform related operations with the network device through the initial BWP. The non-initial BWP is a concept corresponding to the initial BWP, and the BWP included in the carrier except the initial BWP can be called a non-initial BWP. Dedicated BWP: also known as a configured BWP, refers to a BWP dedicated to the terminal device, such as a BWP configured by a network device to the terminal device for performing certain specific services.

[0227] It should be noted that the network device can identify the random access process of the first characteristic of the terminal device during the random access process.

[0228] In an optional implementation manner, the first uplink data transmission may refer to a two-step random access procedure of the first characteristic.

[0229] In an optional implementation, the first resource is an RRC-configured BWP (such as an RRC-configured BWP). A non-RRC-configured BWP may refer to an initial access phase, in which the network device may configure an initial uplink BWP and an initial downlink BWP for the terminal device. After the terminal device enters the RRC connected state, the network device may additionally configure one or more user-specific uplink BWPs and one or more user-specific downlink BWPs for the terminal device. The user-specific BWP may also be referred to as an RRC-configured BWP. Alternatively, the RRC-configured BWP may be an initial BWP or a dedicated BWP that is configured with exclusive configuration information for the network device. A non-RRC-configured BWP is used to refer to a BWP included in a carrier other than the RRC-configured BWP.

[0230] Step S503: The first terminal performs second uplink data transmission according to the first type of parameter information in a non-connected state and / or within a second resource.

[0231] Correspondingly, the network device receives the uplink data in the second uplink data transmission performed by the first terminal.

[0232] In this step, the parameter information of the second uplink data transmission may be determined by the first terminal according to the parameter information of the first type.

[0233] Optionally, in this step, the second uplink data transmission may refer to a two-step random access process of the first characteristic.

[0234] Possible implementation methods of the "first feature" can be found in Figure 4 For the relevant contents of step S401 in the corresponding method, "parameter information" and "first type" can be referred to Figure 4 The relevant contents in step S402 of the corresponding method will not be repeated here.

[0235] In an optional implementation, the second resource is an initial BWP.

[0236] In an optional implementation, the second resource is a non-RRC-configured BWP (eg, RRC-configuredBWP).

[0237] In the embodiment of the present application, since the fourth information does not include the first type of parameter information, the terminal device does not need to perform logical judgment on which specific parameter information to use in the connected state or the first resource, and directly performs random access according to the preset / protocol specified parameter information, thereby reducing energy consumption and speeding up the random access process. By clearly distinguishing the random access process in the connected state and the non-connected state (including the idle state and the inactive state), the terminal device can communicate effectively in different network states, thereby enhancing the robustness and stability of the communication system.

[0238] against Figure 4 and Figure 5 The method shown is to improve the consistency of the understanding of parameters between the terminal device and the network device. In an optional implementation, if the network device is configured with different types of parameter information, the different types of parameter information should be the same. In this way, it is avoided that the parameter information of uplink data transmission in different scenarios or with different characteristics is different, resulting in inconsistent understanding between the terminal device and the network device.

[0239] Optionally, if the same BWP configuration information includes different types of parameter information, the different types of parameter information should be the same. For example, the BWP1 configuration information includes the first type of parameter information and the second type of parameter information, and the first type of parameter information and the second type of parameter information have the same value. For example, the BWP configuration information includes RedCapMsg3 transmission precoding parameter information and eMBB Msg3 transmission precoding parameter information, and the values ​​of these two information should be the same or the precoding methods indicated by these two information should be the same.

[0240] In an optional implementation, when the first information in the BWP does not include the first type of parameter information, if the same BWP configuration information includes different types of parameter information, the different types of parameter information should be the same. For example, the BWP1 configuration information does not include the first type of parameter information, and the BWP1 configuration information includes the second type of parameter information and the third type of parameter information, and the second type of parameter information and the third type of parameter information have the same value. For example, the BWP configuration information does not include RedCap MsgA transmission precoding parameter information, and the initial BWP configuration information includes RedCapMsg3 transmission precoding parameter information and eMBB Msg3 transmission precoding parameter information. The values ​​of RedCap Msg3 transmission precoding parameter information and eMBB Msg3 transmission precoding parameter information should be the same or the precoding methods indicated by these two information should be the same.

[0241] Above, combined Figure 4 and Figure 5 The communication method provided by the embodiment of the present application is described in detail. Figure 6 and Figure 7 The communication device provided in the embodiment of the present application is described in detail. It should be understood that the description of the embodiment of the communication device corresponds to the description of the embodiment of the communication method, so the parts not described in detail can refer to the previous method embodiment.

[0242] See also Figure 6 , Figure 6 Schematic diagram of a communication device provided in an embodiment of the present application. Figure 6 As shown, the communication device 60 may include a transceiver unit 601 and a processing unit 602 .

[0243] In some feasible implementations, the communication device 60 may correspond to Figure 4 The first terminal in the communication method shown, or a component (such as a circuit, a chip, or a chip system) configured in the first terminal.

[0244] Specifically, the transceiver unit 601 is used to receive first information, wherein the first information is used for a random access process of a first feature; the transceiver unit 601 is also used to perform uplink data transmission in a random access process of the first feature according to the second type of parameter information when the first information does not include the first type of parameter information; the transceiver unit 601 is also used to perform uplink data transmission in a random access process of the first feature according to the first type of parameter information when the first information includes the first type of parameter information;

[0245] The transceiver unit 601 is also used to perform uplink data transmission during the random access process of the second characteristic according to the third type of parameter information when converting from the random access of the first characteristic to the random access of the second characteristic. The processing unit 602 is used to generate and process information / data, for example, uplink information / data sent by the first terminal to the network device during the random access process.

[0246] In an optional implementation, the random access process of the first feature and the random access process of the second feature are both random access processes belonging to the first characteristic or the first terminal device type; the first characteristic includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing, and the first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, IoT terminal, or energy saving.

[0247] In an optional implementation manner, the random access process of the first feature is a two-step random access process;

[0248] The random access process of the second feature is a four-step random access process.

[0249] In an optional implementation, the first type includes a random access procedure of the first characteristic, and the third type includes a random access procedure of the second characteristic.

[0250] In an optional implementation manner, the first type is a two-step random access of a first characteristic or a first terminal device type;

[0251] The second type is a four-step random access process of a broadband terminal device eMBB;

[0252] The third type is a four-step random access of the first characteristic or the first terminal device type.

[0253] In an optional implementation manner, the first information includes MsgA-ConfigCommon-r17.

[0254] In an optional implementation manner, the parameter information includes one or more of precoding information, power information or format information.

[0255] In an optional implementation manner, the parameter information includes precoding information;

[0256] The first type of parameter information is used to indicate a first precoding mode for uplink data transmission;

[0257] The second type of parameter information includes a first value or a second value, the first value is used to indicate the second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission;

[0258] The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for the uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used during the uplink data transmission.

[0259] In an optional implementation, the transceiver unit 601 is further used to receive second information, where the second information includes parameter information of the second type; and / or the transceiver unit 601 is further used to receive third information, where the third information includes parameter information of the third type.

[0260] In an optional implementation, one or more of the first information, the second information and the third information are carried by the first signaling.

[0261] Reuse Figure 6 In some feasible implementations, the communication device 60 may correspond to Figure 4 The network device described in the communication method shown, or a component configured in the network device (such as a circuit, a chip or a chip system).

[0262] In a specific implementation, the transceiver unit 601 is used to send the first information to the first terminal;

[0263] The transceiver unit 601 is further configured to receive uplink data transmitted by the first terminal during a random access process of a first feature according to parameter information of a second type when the first information does not include parameter information of the first type;

[0264] The transceiver unit 601 is further configured to, when the first information includes the parameter information of the first type, receive uplink data transmitted during the random access process of the first feature performed by the first terminal according to the parameter information of the first type;

[0265] The transceiver unit 601 is further used to receive uplink data transmitted by the first terminal during the random access of the second feature according to the third type of parameter information if the first terminal switches from the random access of the first feature to the random access of the second feature.

[0266] In an optional implementation, the random access process of the first feature and the random access process of the second feature are both random access processes belonging to the first characteristic or the first terminal device type; the first characteristic includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing, and the first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, IoT terminal, or energy saving.

[0267] In an optional implementation manner, the random access process of the first feature is a two-step random access process;

[0268] The random access process of the second feature is a four-step random access process.

[0269] In an optional implementation, the first type includes a random access procedure of the first characteristic, and the third type includes a random access procedure of the second characteristic.

[0270] In an optional implementation manner, the first type is a two-step random access of a first characteristic or a first terminal device type;

[0271] The second type is a four-step random access process of a broadband terminal device eMBB;

[0272] The third type is a four-step random access of the first characteristic or the first terminal device type.

[0273] In an optional implementation manner, the first information includes MsgA-ConfigCommon-r17.

[0274] In an optional implementation manner, the parameter information includes one or more of precoding information, power information or format information.

[0275] In an optional implementation manner, the parameter information includes precoding information;

[0276] The first type of parameter information is used to indicate a first precoding mode for uplink data transmission;

[0277] The second type of parameter information includes a first value or a second value, the first value is used to indicate the second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission;

[0278] The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for the uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used during the uplink data transmission.

[0279] In an optional implementation manner, the transceiver unit 601 is further configured to send second information to the first terminal, where the second information includes parameter information of a second type; and / or,

[0280] The transceiver unit 601 is further configured to send third information to the first terminal, where the third information includes parameter information of a third type.

[0281] In an optional implementation, one or more of the first information, the second information and the third information are carried by the first signaling.

[0282] Reuse Figure 6 In some feasible implementations, the communication device 60 may correspond to Figure 5 The first terminal described in the communication method, or a component configured in the first terminal (such as a circuit, a chip or a chip system).

[0283] In a specific implementation, the transceiver unit 601 is used to receive fourth information, which does not include parameter information of the first type; the transceiver unit 601 is also used to perform first uplink data transmission in a connected state and / or within a first resource, and the parameter information of the first uplink data transmission is determined based on the parameter information of the second type; the transceiver unit 601 is also used to perform second uplink data transmission in a non-connected state and / or within a second resource, and the parameter information of the second uplink data transmission is determined based on the parameter information of the first type, and the processing unit 602 is used to generate information / data in a random access process.

[0284] In an optional implementation manner, the first uplink data transmission is uplink data transmission in a random access procedure of a first characteristic.

[0285] In an optional implementation manner, the second uplink data transmission is uplink data transmission in a random access process of the first characteristic.

[0286] In an optional implementation manner, the first resource is a non-initial BWP or a dedicated BWP. The second resource is an initial BWP.

[0287] In an optional implementation, the first resource is a non-RRC-configured BWP (eg, RRC-configured BWP), and the second resource is a RRC-configured BWP (eg, RRC-configured BWP).

[0288] Reuse Figure 6 In some feasible implementations, the communication device 60 may correspond to Figure 5 The network device described in the communication method shown, or a component configured in the network device (such as a circuit, a chip or a chip system).

[0289] The transceiver unit 601 is used to send fourth information to the first terminal, and the fourth information does not include the first type of parameter information; the transceiver unit 601 is also used to receive uplink data in a first uplink data transmission performed by the first terminal when the first terminal is in a connected state and / or within a first resource, and the parameter information of the first uplink data transmission is determined by the first terminal according to the second type of parameter information; the transceiver unit 601 is also used to receive uplink data in a second uplink data transmission performed by the first terminal when the first terminal is in a non-connected state and / or within a second resource, and the parameter information of the second uplink data transmission is determined by the first terminal according to the first type of parameter information.

[0290] In an optional implementation manner, the first uplink data transmission is uplink data transmission in a random access procedure of a first characteristic.

[0291] In an optional implementation manner, the second uplink data transmission is uplink data transmission in a random access process of the first characteristic.

[0292] In an optional implementation manner, the first resource is a non-initial BWP or a dedicated BWP. The second resource is an initial BWP.

[0293] In an optional implementation, the first resource is an RRC-configured BWP (eg, an RRC-configured BWP), and the second resource is a non-RRC-configured BWP (eg, an RRC-configured BWP).

[0294] See also Figure 7 , Figure 7 70 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. The communication device 70 can be used to implement the operations performed by the first terminal, the second network device, or the third network device in the above embodiment, or the communication device 70 can be the first terminal, the second network device, or the third network device described above. The communication device 70 includes: a processor 701, a memory 702, and a bus system 703.

[0295] The memory 702 includes but is not limited to RAM, ROM, EPROM or CD-ROM, and is used to store relevant instructions and data. The memory 702 stores the following elements, executable modules or data structures, or their subsets, or their extended sets:

[0296] Operation instructions: include various operation instructions, used to implement various operations.

[0297] Operating system: includes various system programs used to implement various basic businesses and handle hardware-based tasks.

[0298] Figure 7 Only one memory is shown in the figure, of course, the memory can also be set to multiple as needed.

[0299] The communication device 70 may further include a transceiver 704. The transceiver 704 may be a communication module or a transceiver circuit. In the embodiment of the present application, the transceiver 704 is used to perform the message transceiver operations involved in the above embodiment.

[0300] The processor 701 may be a controller, a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. The processor 701 may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0301] In a specific application, the components of the communication device 70 are coupled together through the bus system 703, wherein the bus system 703 may include a power bus, a control bus, and a status signal bus in addition to a data bus. Figure 7 In FIG. 7 , various buses are labeled as bus system 703. For ease of representation, Figure 7 The drawing is only schematic.

[0302] In a specific implementation, the communication device 70 may execute the steps of the method performed by the first terminal, the second network device, or the third network device in any of the above embodiments. Specifically, when the communication device 70 is used to implement the steps performed by the first terminal, the second network device, or the third network device in the communication method provided in any of the above embodiments, the processor 701 may be used to implement the function of the above processing unit 602, and the transceiver 704 is used to implement the function of the above transceiver unit 601.

[0303] It should be noted that in practical applications, the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by an integrated logic circuit of hardware in the processor or an instruction in the form of software. The above processor may 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 gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in the embodiment of the present application may be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in a decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0304] 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 (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (directrambus RAM, DR RAM). It should be noted that the memory described in the embodiments of the present application is intended to include but is not limited to these and any other suitable types of memory.

[0305] The present application also provides a computer-readable medium on which a computer program is stored, which, when executed by a computer, implements the above Figure 4 or Figure 5 The communication method provided includes method steps executed by the first terminal and the network device.

[0306] The present application also provides a computer program product, which, when executed by a computer, implements the above Figure 4 or Figure 5 The communication method provided includes method steps executed by the first terminal and the network device.

[0307] The present application also provides a chip, which at least includes a processor. The processor is used to execute computer execution instructions so that the device equipped with the chip can realize the above Figure 4 or Figure 5 The communication method provided includes method steps executed by the first terminal and the network device.

[0308] Optionally, the chip may further include an interface circuit, which is used to receive computer execution instructions and transmit them to the processor.

[0309] The present application also provides a chip system, which includes a processor for supporting a device equipped with the chip system to implement the above Figure 4 or Figure 5 The method steps performed by the first terminal and the network device in the provided communication method, such as generating or processing the data and / or information involved in the above method. In one possible design, the chip system also includes a memory, which is used to store program instructions and data necessary for the data sending device. The chip system can be composed of a chip, or it can include a chip and other discrete devices.

[0310] The present application also provides a communication system. The communication system includes at least the first terminal and the network device described above. The first terminal, the first terminal, and the network device work together to implement the above Figure 4 or Figure 5 The communication method shown.

[0311] In the above method embodiment, 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 process or function described in the embodiment of the present application is 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 may 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 may be transmitted from one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a high-density digital video disc (DVD), or a semiconductor medium (e.g., a solid state disk (SSD), etc.).

[0312] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0313] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

[0314] The above description is only a preferred embodiment of the technical solution of this application, and is not intended to limit the protection scope of this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A communication method, characterized in that: The method comprises: receiving first information, wherein the first information is used for a random access procedure of a first feature; When the first information does not include the first type of parameter information, performing uplink data transmission in the random access process of the first characteristic according to the second type of parameter information; In a case where the first information includes parameter information of a first type, performing uplink data transmission in a random access process of a first characteristic according to the parameter information of the first type; If the random access of the first characteristic is converted to the random access of the second characteristic, uplink data transmission in the random access process of the second characteristic is performed according to the parameter information of the third type.

2. The method according to claim 1, characterized in that The random access process of the first feature and the random access process of the second feature belong to the random access process of the first feature or the first terminal device type; the first feature includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing, and the first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, IoT terminal, or energy saving.

3. The method according to claim 1 or 2, characterized in that: The random access process of the first feature is a two-step random access process; The random access process of the second feature is a four-step random access process.

4. The method according to any one of claims 1 to 3, characterized in that: The first type includes the random access procedure of the first feature, and the third type includes the random access procedure of the second feature.

5. The method according to any one of claims 1 to 4, characterized in that: The first type is a two-step random access process of a first characteristic or a first terminal device type; The second type is a four-step random access process of a broadband terminal device eMBB; The third type is a four-step random access process of the first characteristic or the first terminal device type.

6. The method according to any one of claims 1 to 5, characterized in that: The first information includes MsgA-ConfigCommon-r17.

7. The method according to any one of claims 1 to 6, characterized in that: The parameter information includes one or more of precoding information, power information or format information.

8. The method according to claim 7, characterized in that The parameter information includes precoding information; The first type of parameter information is used to indicate a first precoding mode for uplink data transmission; The second type of parameter information includes a first value or a second value, the first value is used to indicate the second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission; The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for the uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used during the uplink data transmission.

9. The method according to any one of claims 1 to 8, characterized in that: The method further comprises: receiving second information, wherein the second information includes parameter information of a second type; and / or, Third information is received, the third information comprising parameter information of a third type.

10. The method according to any one of claims 1 to 9, characterized in that: One or more of the first information, the second information and the third information are carried by the first signaling.

11. A communication method, characterized in that: The method comprises: Sending first information to a first terminal; In a case where the first information does not include parameter information of the first type, receiving uplink data transmitted by the first terminal during a random access process of a first feature performed according to parameter information of the second type; In a case where the first information includes the parameter information of the first type, receiving uplink data transmitted by the first terminal during the random access process of the first feature performed according to the parameter information of the first type; If the first terminal converts from the random access of the first feature to the random access of the second feature, uplink data transmitted by the first terminal during the random access of the second feature according to the parameter information of the third type is received.

12. The method according to claim 11, characterized in that The random access process of the first feature and the random access process of the second feature belong to the random access process of the first feature or the first terminal device type; the first feature includes one or more of coverage enhancement, small packet transmission, non-terrestrial transmission, energy saving, and slicing, and the first terminal device type includes one or more of reduced complexity RedCap, further reduced complexity eRedCap, non-terrestrial transmission, IoT terminal, or energy saving.

13. The method according to claim 11 or 12, characterized in that: The random access process of the first feature is a two-step random access process; The random access process of the second feature is a four-step random access process.

14. The method according to any one of claims 11 to 13, characterized in that: The first type includes the random access procedure of the first feature, and the third type includes the random access procedure of the second feature.

15. The method according to any one of claims 11 to 14, characterized in that: The first type is a two-step random access process of a first characteristic or a first terminal device type; The second type is a four-step random access process of a broadband terminal device eMBB; The third type is a four-step random access process of the first characteristic or the first terminal device type.

16. The method according to any one of claims 11 to 15, characterized in that: The first information includes MsgA-ConfigCommon-r17.

17. The method according to any one of claims 11 to 16, characterized in that: The parameter information includes one or more of precoding information, power information or format information.

18. The method according to claim 17, characterized in that The parameter information includes precoding information; The first type of parameter information is used to indicate a first precoding mode for uplink data transmission; The second type of parameter information includes a first value or a second value, the first value is used to indicate the second precoding mode for uplink data transmission, and the second value is used to indicate that the second precoding mode is not used during uplink data transmission; The third type of parameter information includes a third value or a fourth value, the third value is used to indicate a third precoding mode for the uplink data transmission, and the fourth value is used to indicate that the third precoding mode is not used during the uplink data transmission.

19. The method according to any one of claims 11 to 18, characterized in that: The method further comprises: sending second information to the first terminal, where the second information includes parameter information of a second type; and / or, Send third information to the first terminal, where the third information includes parameter information of a third type.

20. The method according to any one of claims 11 to 19, characterized in that: One or more of the first information, the second information and the third information are carried by the first signaling.

21. A communication device, characterized in that: The communication device comprises a processor; the processor is configured to run a computer program or instruction so that the communication device executes the method according to any one of claims 1 to 10.

22. A communication device, characterized in that: The communication device comprises a processor; the processor is configured to run a computer program or instruction so that the communication device executes the method according to any one of claims 11 to 20.

23. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions or programs. When the computer instructions or programs are executed on a computer, the method according to any one of claims 1 to 20 is executed.

24. A communication system, characterized in that: The communication system comprises at least a first terminal and a network device, wherein the first terminal is used to implement the method according to any one of claims 1 to 10, and the network device is used to implement the method according to any one of claims 11 to 20.

25. A computer program product, characterized in that The computer program product includes computer instructions; when part or all of the computer instructions are run on a computer, the method according to any one of claims 1 to 20 is executed.

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