Information transmission method and apparatus

Abstract

To provide an information transmission method, a communication device, a program, and a chip that avoid frequency switching of an operating frequency of a communication device, reduce power consumption, and improve information transmission flexibility.SOLUTION: In an information transmission method, a first terminal device determines a first resource based on a first reference point and a first bandwidth. Here, the first reference point is used to determine a location of the first resource; the first bandwidth is a size of the first resource; the size of the first resource is equal to or less than a maximum channel bandwidth supported by the first terminal device; and the first terminal device is a first-type terminal device. The first terminal device sends and / or receives information on the first resource. This resolves a problem of frequency switching of an operating frequency of a communication device in a network access process, effectively reduces power consumption of the communication device, and improves information transmission flexibility.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This application claims the priority of Chinese Patent Application No. 202110286882.2, titled "Information Transmission Method and Apparatus", filed with the China National Intellectual Property Administration on March 17, 2021, which is incorporated herein by reference in its entirety.

[0002] This application relates to the field of communications, and in particular, to an information transmission method and apparatus.

Background Art

[0003] In the process of a communication device accessing a network device, two adjacent uplink transmissions correspond to different operating frequencies, or two adjacent downlink receptions correspond to different operating frequencies. As a result, frequency adjustment is performed for the service of the communication device during adjacent uplink transmissions, or frequency adjustment is performed for the service of the communication device during adjacent downlink receptions. The frequency switching of the operating frequency causes high power consumption of the communication device.

Summary of the Invention

[0004] This application provides an information transmission method and apparatus to avoid frequency switching of the operating frequency of a communication device, reduce power consumption, and improve the flexibility of information transmission.

[0005] According to a first aspect, an information transmission method is provided. The method may comprise a step in which a first terminal device acquires first information, where the first information indicates M bandwidth resources, M is a positive integer, the first terminal device is a first type of terminal device, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device. The first terminal device acquires a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit. The first terminal device determines a first bandwidth resource from the M bandwidth resources based on the first information and the first parameter. The first terminal device transmits uplink information or receives downlink information on the first bandwidth resource.

[0006] The first information may be system information, such as SIB1, and the first parameter may be held in random access channel configuration information. The first terminal device is a first type of terminal device, and the first type of terminal device may be a reduced capability UE (REDCAP UE). Characteristics such as the bandwidth, the number of supported or configured resources, the number of transmit antenna ports, and / or the number of receive antenna ports, the number of radio frequency channels, the number of hybrid automatic repeat request (HARQ) processes, the supported peak rate, the delay requirement, and the processing capability of the first type of terminal device are lower than those of a second type of terminal device (which may be a legacy UE).

[0007] It should be understood that the sizes of the M bandwidth resources may be the same or different. This is not limited in the present application.

[0008] In the method, at least one bandwidth resource whose size is within the maximum bandwidth channel range supported by the first terminal device is configured, and the first terminal device determines the first bandwidth resource based on the first information and the first parameter. Thereby, the frequency switching of the operating frequency of the first terminal device can be avoided, and the power consumption can be reduced.

[0009] Referring to the first aspect, in some implementations of the first aspect, the value of the first parameter is greater than 4. When M = 1, the bandwidth resource is the first bandwidth resource. The first bandwidth resource includes the predefined resources of N random access channel opportunities. The number of random access channel opportunities that is the first parameter includes N random access channel opportunities, where N is a positive integer; or when M = 1, the bandwidth resource is the first bandwidth resource, and the start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity, and the first random access channel opportunity is indicated by the first indication information; or when M>1, each of the M bandwidth resources includes resources corresponding to at least one random access channel opportunity.

[0010] Referring to the first aspect, in some implementations of the first aspect, the value of the first parameter is 8, the indexes of the random access channel opportunities sorted in the first order are from 0 to 7, and the first order includes the ascending order of frequencies.

[0011] It should be understood that the first order can also be understood as the ascending order of the positions of the random access channel opportunities in the frequency domain.

[0012] The first terminal device acquires first indication information. Here, when the first indication information includes 1 bit, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 4}; or, when the first indication information includes 2 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {1, 2, 3, 4}; or, when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 1, 2, 3, 4}; or, when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 1, 2, 3, 4, 5, 6, 7}; or, when the first terminal device does not acquire the first indication information, the index of the first random access channel opportunity is 0.

[0013] When including 3 bits, the first indication information may indicate the indexes of {0, 1, 2, 3, 4}, and it should be understood that the bandwidth resources corresponding to the five random access channel opportunities may cover the maximum channel bandwidth supported by the first terminal device. The first indication information may alternatively indicate the indexes of eight random access channel opportunities.

[0014] It should be understood that the first terminal device not acquiring the first indication information may mean that the first terminal device does not receive the first indication information, or that the network device does not configure the first indication information.

[0015] Referring to the first aspect, in some implementations of the first aspect, the size of each of the M bandwidth resources is predefined; or when M = 2, one of the bandwidth resources in the bandwidth resource includes resources of the random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resource includes resources of the random access channel opportunities {4, 5, 6, 7}; or when M>1, the remaining (M - 1) bandwidth resources are determined based on the first candidate bandwidth resource, and the first candidate bandwidth resource is indicated by using the first signaling.

[0016] It should be understood that the size of the M bandwidth resources can be predefined or determined based on the resources of the random access channel opportunities. Alternatively, the starting bandwidth opportunity can be determined based on the random access channel opportunities, and the other bandwidth resources can be continuously configured by starting with the resources.

[0017] Referring to the first aspect, in some implementations of the first aspect, when M>1, the first terminal device receives second indication information, where the second indication information indicates a second bandwidth resource. The first terminal device transmits a random access preamble on the first bandwidth resource. The first terminal device transmits a physical uplink control channel for feedback to message 3 in the random access process or a contention resolution message on the second bandwidth resource.

[0018] That is, when M>1, the second bandwidth resource can be indicated by the indication information, and the first terminal device transmits information on the first bandwidth resource and the second bandwidth resource.

[0019] Referring to the first aspect, in some implementations of the first aspect, the second indication information is carried in one or more of a random access response message, downlink control information for scheduling the random access response message, a contention resolution message, and downlink control information for scheduling the contention resolution message; and / or the second indication information is carried in each medium access control random access response uplink grant in the random access response message.

[0020] Referring to the first aspect, in some implementations of the first aspect, when M>1, the first terminal device transmits a random access preamble on the first bandwidth resource. The first terminal device receives third indication information, where the third indication information indicates a bandwidth resource for the first terminal device to transmit a physical uplink control channel for feedback to message 3 in the random access process and / or a contention resolution message.

[0021] When the bit status of the third indication information is in the first bit state, the first terminal device transmits a physical uplink control channel for feedback to message 3 in the random access process and / or a contention resolution message on the first bandwidth resource; or when the bit status of the third indication information is in the second bit state, the first terminal device transmits a physical uplink control channel for feedback to message 3 in the random access process and / or a contention resolution message on the second bandwidth resource.

[0022] That is, the bit status of the third indication information can be used to indicate a bandwidth resource for transmitting a physical uplink control channel for feedback to message 3 in the random access process and / or a contention resolution message.

[0023] It should be understood that the relationship between the bit status of the third indication information and the indicated bandwidth resource is not limited.

[0024] Referring to the first aspect, in some implementations of the first aspect, the first terminal device obtains fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access is the first related configuration or the second related configuration; or, when the first terminal device obtains the fourth indication information, the fourth indication information indicates that the related configuration between the SSB and the random access is the second related configuration; or, when the first terminal device does not receive the fourth indication information, the related configuration between the SSB and the random access is the first related configuration.

[0025] That is, the content of the fourth indication information can be used to indicate the type of the related configuration, or the existence of the fourth indication information can be used to indicate the type of the related configuration.

[0026] According to the second aspect, a bandwidth resource determination method is provided. The method may include a step in which the network device transmits first information to the first terminal device, where the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device, and the first terminal device is a first type of terminal device. The network device transmits a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit. The network device receives uplink information transmitted by the first terminal device on the first bandwidth resource, or transmits downlink information to the first terminal device, where the first bandwidth resource is determined by the first terminal device from the M bandwidth resources based on the first information and the first parameter.

[0027] In the method, at least one bandwidth resource whose size is within the maximum bandwidth channel range supported by the first terminal device is configured, and the first information and the first parameter are transmitted. As a result, the first terminal device determines the first bandwidth resource. Thereby, frequency switching of the operating frequency of the first terminal device can be avoided, and power consumption can be reduced.

[0028] Referring to the second aspect, in some implementations of the second aspect, the value of the first parameter is greater than 4. When M = 1, the M bandwidth resources are the first bandwidth resource. The first bandwidth resource includes the predefined resources of N random access channel opportunities. The number of random access channel opportunities that is the first parameter includes N random access channel opportunities, where N is a positive integer; or when M = 1, the network device transmits the first indication information. Here, the first indication information indicates the first random access channel opportunity. The start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity. The M bandwidth resources are the first bandwidth resource; or when M>1, each of the M bandwidth resources includes resources corresponding to at least one random access channel opportunity.

[0029] Referring to the second aspect, in some implementations of the second aspect, the value of the first parameter is 8, the index of the random access channel opportunities sorted in the first order is 0 to 7, and the first order includes ascending order of frequency.

[0030] Referring to the second aspect, in some implementations of the second aspect, when the first indication information includes 1 bit, the first indication information indicates the index of the first random access channel opportunity at indices {0, 4}; or when the first indication information includes 2 bits, the first indication information indicates the index of the first random access channel opportunity at indices {1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indices {0, 1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indices {0, 1, 2, 3, 4, 5, 6, 7}; or when the network device does not send the first indication information, the index of the first random access channel opportunity is 0.

[0031] Referring to the second aspect, in some implementations of the second aspect, the size of each of the M bandwidth resources is predefined; or when M = 2, one of the bandwidth resources in the bandwidth resource includes the resources of the random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resource includes the resources of the random access channel opportunities {4, 5, 6, 7}; or when M > 1, the network device sends the first signaling, where the first signaling is used to indicate the first candidate bandwidth resource, and the remaining (M - 1) bandwidth resources are determined based on the first candidate bandwidth resource.

[0032] Referring to the second aspect, in some implementations of the second aspect, the network device sends the second indication information, where the second indication information indicates the second bandwidth resource. The network device receives a random access preamble on the first bandwidth resource. The network device receives a physical uplink control channel for feedback on message 3 in the random access process, or a contention resolution message, on the second bandwidth resource.

[0033] Referring to the second aspect, in some implementations of the second aspect, the second indication information is carried in one or more of a random access response message, downlink control information for scheduling the random access response message, a contention resolution message, and downlink control information for scheduling the contention resolution message; and / or the second indication information is carried in the uplink grant of each media access control random access response in the random access response message.

[0034] Referring to the second aspect, in some implementations of the second aspect, when M>1, the network device receives a random access preamble on the first bandwidth resource. The network device transmits third indication information, where the third indication information indicates a bandwidth resource for the first terminal device to transmit a physical uplink control channel for feedback on message 3 in the random access process and / or the contention resolution message.

[0035] When the bit status of the third indication information is in the first bit state, the network device receives a physical uplink control channel for feedback on message 3 in the random access process and / or the contention resolution message on the first bandwidth resource; or when the bit status of the third indication information is in the second bit state, the network device receives a physical uplink control channel for feedback on message 3 in the random access process and / or the contention resolution message on the second bandwidth resource.

[0036] Referring to the second aspect, in some implementations of the second aspect, the network device transmits the fourth indication information, where the fourth indication information indicates that the relevant configuration between the SSB and the random access is the first relevant configuration or the second relevant configuration; or when the network device transmits the fourth indication information, the fourth indication information indicates that the relevant configuration between the SSB and the random access is the first relevant configuration; or when the network device does not transmit the fourth indication information, the relevant configuration between the SSB and the random access is the second relevant configuration; or when the network device transmits the fourth indication information, the fourth indication information indicates that the relevant configuration between the SSB and the random access is the second relevant configuration; or when the network device does not transmit the fourth indication information, the relevant configuration between the SSB and the random access is the first relevant configuration.

[0037] It should be understood that the extension, definition, description, and description of the relevant content in the first aspect are also applicable to the same content in the second aspect.

[0038] According to the third aspect, an information transmission method is provided. The method may include a step in which a first terminal device determines a first resource based on a first reference point and a first bandwidth, where the first reference point is used to determine the position of the first resource, and the first bandwidth is the bandwidth of the first resource. The first terminal device transmits information in the first resource and / or receives information in the first resource, where the first terminal device is a first type of terminal device, and the size of the first resource is equal to or smaller than the maximum channel bandwidth supported by the first terminal device. The first terminal device transmits uplink information in the first resource and / or the first terminal device receives downlink information in the first resource.

[0039] The method provides the determined reference point and the determined bandwidth. Thereby, it is possible to prevent the first terminal device from determining the first resource through multiple detections, reduce the computing complexity of the first terminal device, and reduce power consumption.

[0040] Referring to the third aspect, in some implementations of the third aspect, the first bandwidth may be determined based on one or more of the sub-band size reported by CSI, the sub-carrier spacing, and the maximum channel bandwidth supported by the first terminal device.

[0041] The first resource may alternatively be determined based on the first reference point and the first offset, where it should be understood that the first offset may also be determined based on one or more of the sub-band size reported by CSI, the sub-carrier spacing, and the maximum channel bandwidth supported by the first terminal device.

[0042] The maximum channel bandwidth supported by the first terminal device may be the transmission bandwidth, and it should be understood that the transmission bandwidth may be the number of resource blocks corresponding to the maximum channel bandwidth at different sub-carrier spacings.

[0043] Referring to the third aspect, in some implementations of the third aspect, there is a relationship between the maximum channel bandwidth supported by the first terminal device and the sub-carrier spacing.

[0044] It should be understood that the relationship may be indicated by indication information or may be predefined.

[0045] Referring to the third aspect, in some implementations of the third aspect, the first bandwidth may be determined based on a positive integer multiple of the maximum channel bandwidth supported by the first terminal device.

[0046] Referring to the third aspect, in some implementations of the third aspect, the first bandwidth or the first offset may be determined based on the least common multiple of a plurality of items in the sub-band size reported by CSI, the sub-carrier spacing, and the maximum channel bandwidth supported by the first terminal device.

[0047] Referring to the third aspect, in some implementations of the third aspect, the first terminal device may receive indication information, where the indication information indicates a first reference point, and the first reference point may be one or more of the first resource block (RB) of the second resource, the central frequency or central sub-carrier of the second resource, the last RB of the second resource, common resource block 0, and point A; or the second resource is a resource configured for the second terminal device, and the number of resource blocks included in the second resource may be greater than the number of resource blocks corresponding to the maximum channel bandwidth of the first terminal device.

[0048] It should be understood that the indication information may be carried in SIB1 or SIB1 PDCCH.

[0049] It should be further understood that the first reference point may be indicated by the indication information or may be predefined.

[0050] Referring to the third aspect, in some implementations of the third aspect, the position of the first resource may be determined based on the first reference point and the first offset.

[0051] Referring to the third aspect, in some implementations of the third aspect, the first offset may be N RBs between the first resource and common resource block 0. The position of the first resource may be MOD (the first reference point + the first offset, BW), or MOD (BW, the reference point of the first resource the first offset), where BW is the bandwidth of the second resource or the carrier bandwidth.

[0052] It should be understood that there is a relationship between the first offset and the sub-carrier spacing, and it may be indicated by the indication information or may be predefined.

[0053] The second information is received, where the second information indicates at least two of the first bandwidth, the first reference point, and the first offset.

[0054] According to a fourth aspect, an information transmission method is provided. The method may include that a network device can transmit a first reference point and a first bandwidth to a first terminal device, where the first reference point is used to determine the position of a first resource, and the first bandwidth is the bandwidth of the first resource. The network device transmits and / or receives information in the first resource, where the first resource is determined by the first terminal device based on the first reference point and the first bandwidth, the first terminal device is a first type of terminal device, and the size of the first resource is equal to or smaller than the maximum channel bandwidth supported by the first terminal device.

[0055] The method provides the determined reference point and the determined bandwidth. Thereby, it is possible to prevent the first terminal device from determining the first resource through multiple detections, reduce the computing complexity of the first terminal device, and reduce power consumption.

[0056] It should be understood that the network device transmits the first reference point, the first bandwidth is optional, and the first reference point and the first bandwidth may also be predefined.

[0057] Referring to the fourth aspect, in some implementations of the fourth aspect, the first bandwidth may be determined based on the sub-band size, sub-carrier spacing reported by CSI, and one or more of the maximum channel bandwidths supported by the first terminal device.

[0058] It should be understood that the first bandwidth may alternatively be determined based on the first reference point and a first offset, where the first offset may also be determined based on the sub-band size, sub-carrier spacing reported by CSI, and one or more of the maximum channel bandwidths supported by the first terminal device.

[0059] The maximum channel bandwidth supported by the first terminal device may be the transmission bandwidth, and it should be understood that the transmission bandwidth may be the number of resource blocks corresponding to the maximum channel bandwidth at different subcarrier intervals.

[0060] Referring to the fourth aspect, in some implementations of the fourth aspect, there is a relationship between the maximum channel bandwidth supported by the first terminal device and the subcarrier interval.

[0061] It should be understood that the relationship may be indicated by the indication information transmitted by the network device or may be predefined.

[0062] Referring to the fourth aspect, in some implementations of the fourth aspect, the network device may determine the first bandwidth based on a positive integer multiple of the maximum channel bandwidth supported by the first terminal device.

[0063] Referring to the fourth aspect, in some implementations of the fourth aspect, the network device may determine the first bandwidth or the first offset based on the least common multiple of a plurality of items in the sub-band size reported by the CSI, the subcarrier interval, and the maximum channel bandwidth supported by the first terminal device.

[0064] Referring to the fourth aspect, in some implementations of the fourth aspect, the network device may transmit indication information, where the indication information indicates a first reference point, and the first reference point may be the first RB of the second resource, the center frequency or center subcarrier of the second resource, the last RB of the second resource, the common resource block 0, or one or more of point A, the second resource is a resource configured for the second terminal device, and the number of resource blocks included in the second resource may be greater than the number of resource blocks corresponding to the maximum channel bandwidth for the first terminal device.

[0065] The indication information should be understood to be carriable in SIB1 or SIB1 PDCCH.

[0066] It should be further understood that the first reference point can be indicated by the indication information or can be predefined.

[0067] Referring to the fourth aspect, in some implementations of the fourth aspect, the network device may transmit the first reference point and the first offset, and the position of the first resource may be determined based on the first reference point and the first offset.

[0068] Referring to the fourth aspect, in some implementations of the fourth aspect, the first offset may be N RBs between the first resource and the common resource block 0. The position of the first resource may be MOD (the first reference point + the first offset, BW), or MOD (BW, the reference point of the first resource the first offset), where BW is the bandwidth of the second resource or the carrier bandwidth.

[0069] It should be understood that there is a relationship between the first offset and the subcarrier spacing, which can be indicated by the indication information transmitted by the network device or can be predefined.

[0070] According to the fifth aspect, a communication device is provided. The device includes a transceiver unit configured to receive first information, where the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by a first type of terminal device; the transceiver unit is further configured to receive a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit; and a processing unit configured to determine a first bandwidth resource from the M bandwidth resources based on the first information and the first parameter, where the transceiver unit is further configured to transmit uplink information or receive downlink information on the first bandwidth resource.

[0071] Referring to the fifth aspect, in some implementations of the fifth aspect, when the value of the first parameter is greater than 4 and M = 1, the M bandwidth resources are the first bandwidth resource, and the first bandwidth resource includes pre-defined resources of N random access channel opportunities, and the number of random access channel opportunities that is the first parameter includes the N random access channel opportunities, where N is a positive integer; or when M = 1, the M bandwidth resources are the first bandwidth resource, and specifically, the transceiver unit is configured to receive first indication information, where the first indication information indicates a first random access channel opportunity, and the start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity; or when M > 1, each of the M bandwidth resources includes resources corresponding to at least one random access channel opportunity.

[0072] Referring to the fifth aspect, in some implementations of the fifth aspect, the value of the first parameter is 8, and the indexes of the random access channel opportunities sorted in the first order are from 0 to 7, and the first order includes ascending order of frequency.

[0073] Referring to the fifth aspect, in some implementations of the fifth aspect, the transceiver unit receives first indication information, where when the first indication information includes 1 bit, the first indication information indicates the index of the first random access channel opportunity at indices {0, 4}; or when the first indication information includes 2 bits, the first indication information indicates the index of the first random access channel opportunity at indices {1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indices {0, 1, 2, 3, 4}, or when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indices {0, 1, 2, 3, 4, 5, 6, 7}; or when the transceiver unit does not receive the first indication information, the index of the first random access channel opportunity is 0.

[0074] Referring to the fifth aspect, in some implementations of the fifth aspect, the size of each of the M bandwidth resources is predefined; or when M = 2, one of the bandwidth resources in the bandwidth resource includes the resources of the random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resource includes the resources of the random access channel opportunities {4, 5, 6, 7}; or when M > 1, the processing unit is specifically configured to receive first signaling, where the first signaling is used to indicate the first candidate bandwidth resource, and the processing unit is specifically configured to determine the remaining (M - 1) bandwidth resources based on the first candidate bandwidth resource.

[0075] Referring to the fifth aspect, in some implementations of the fifth aspect, when M>1, the transceiver unit is specifically configured to receive second indication information, where the second indication information indicates a second bandwidth resource, and the transceiver unit is further configured to transmit a random access preamble on the first bandwidth resource; the transceiver unit is further configured to transmit a physical uplink control channel for feedback to message 3 in the random access process or a contention resolution message on the second bandwidth resource.

[0076] Referring to the fifth aspect, in some implementations of the fifth aspect, the second indication information is carried in one or more of a random access response message, downlink control information for scheduling the random access response message, a contention resolution message, and downlink control information for scheduling the contention resolution message; and / or the second indication information is carried in the uplink grant of each medium access control random access response in the random access response message.

[0077] Referring to the fifth aspect, in some implementations of the fifth aspect, when M>1, the transceiver unit is specifically configured to transmit a random access preamble on the first bandwidth resource and receive third indication information, where the third indication information indicates the bandwidth resource for the transceiver unit to transmit message 3 in the random access process and / or transmit a physical uplink control channel for feedback to the contention resolution message.

[0078] Referring to the fifth aspect, in some implementations of the fifth aspect, when the bit status of the third indication information is the first bit status, the transceiver unit transmits Message 3 in the random access process on the first bandwidth resource and / or transmits a physical uplink control channel for feedback to the contention resolution message on the first bandwidth resource; or when the bit status of the third indication information is the second bit status, the transceiver unit transmits Message 3 in the random access process on the second bandwidth resource and / or transmits a physical uplink control channel for feedback to the contention resolution message on the second bandwidth resource.

[0079] Referring to the fifth aspect, in some implementations of the fifth aspect, the transceiver unit receives fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration or the second related configuration, and the related configuration is the related configuration between the number of SSBs and the number of random access channel opportunities.

[0080] Referring to the fifth aspect, in some implementations of the fifth aspect, when the transceiver unit receives the fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration; or when the transceiver unit does not receive the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the second related configuration; or when the transceiver unit receives the fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the second related configuration; or when the transceiver unit does not receive the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the first related configuration.

[0081] Referring to the fifth aspect, in some implementations of the fifth aspect, the first parameter is carried in the random access channel configuration information.

[0082] Referring to the fifth aspect, in some implementations of the fifth aspect, the first information includes system information.

[0083] According to the sixth aspect, a communication device is provided. The device includes a transceiver unit configured to transmit a first parameter to a first terminal device, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit; and a processing unit configured to configure M bandwidth resources, where the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device. Here, the transceiver unit is further configured to receive uplink information transmitted by the first terminal device, or transmit downlink information to the first terminal device on a first bandwidth resource, and the first bandwidth resource is determined from the M bandwidth resources by the first terminal device based on the first information and the first parameter.

[0084] Referring to the sixth aspect, in some implementations of the sixth aspect, the value of the first parameter is greater than 4. When M = 1, the M bandwidth resources are the first bandwidth resource, and the first bandwidth resource includes a predefined resource of N random access channel opportunities. The random access channel opportunities with the number being the first parameter include the N random access channel opportunities, where N is a positive integer; or when M = 1, the transceiver unit transmits first indication information, where the first indication information indicates the first random access channel opportunity, and the start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity, and the M bandwidth resources are the first bandwidth resource; or when M>1, each of the M bandwidth resources includes a resource corresponding to at least one random access channel opportunity.

[0085] Referring to the sixth aspect, in some implementations of the sixth aspect, the value of the first parameter is 8, the indexes of the random access channel opportunities sorted in the first order are from 0 to 7, and the first order includes ascending order of frequencies.

[0086] Referring to the sixth aspect, in some implementations of the sixth aspect, when the first indication information includes 1 bit, the first indication information indicates the indexes of the first random access channel opportunities at indexes {0, 4}; or when the first indication information includes 2 bits, the first indication information indicates the indexes of the first random access channel opportunities at indexes {1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the indexes of the first random access channel opportunities at indexes {0, 1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the indexes of the first random access channel opportunities at indexes {0, 1, 2, 3, 4, 5, 6, 7}; or when the transceiver unit does not transmit the first indication information, the index of the first random access channel opportunity is equal to 0.

[0087] Referring to the sixth aspect, in some implementations of the sixth aspect, the first information indicates M bandwidth resources, and the size of each of the M bandwidth resources is predefined; or when M = 2, one of the bandwidth resources in the bandwidth resource includes the resources of the random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resource includes the resources of the random access channel opportunities {4, 5, 6, 7}; or when M > 1, the transceiver unit is further configured to transmit first signaling, where the first signaling is used to indicate the first candidate bandwidth resource, and the remaining (M - 1) bandwidth resources are determined based on the first candidate bandwidth resource.

[0088] Referring to the sixth aspect, in some implementations of the sixth aspect, when M>1, the transceiver unit further transmits second indication information, where the second indication information indicates a second bandwidth resource; and receives a random access preamble on the first bandwidth resource; and is configured to receive a physical uplink control channel for feedback to message 3 in the random access process or a contention resolution message on the second bandwidth resource.

[0089] Referring to the sixth aspect, in some implementations of the sixth aspect, the second indication information is carried in one or more of a random access response message, downlink control information for scheduling the random access response message, a contention resolution message, and downlink control information for scheduling the contention resolution message; and / or the second indication information is carried in the uplink grant of each medium access control random access response in the random access response message.

[0090] Referring to the sixth aspect, in some implementations of the sixth aspect, when M>1, the transceiver unit is specifically configured to receive a random access preamble on the first bandwidth resource and transmit third indication information, where the third indication information indicates a bandwidth resource for the first terminal device to transmit a physical uplink control channel for feedback to message 3 in the random access process and / or a contention resolution message.

[0091] Referring to the sixth aspect, in some implementations of the sixth aspect, when the bit status of the third indication information is the first bit status, the transceiver unit receives message 3 in the random access process on the first bandwidth resource, and / or receives a physical uplink control channel for feedback to the contention resolution message on the first bandwidth resource; or when the bit status of the third indication information is the second bit status, the transceiver unit receives message 3 in the random access process on the second bandwidth resource, and / or receives a physical uplink control channel for feedback to the contention resolution message on the second bandwidth resource.

[0092] Referring to the sixth aspect, in some implementations of the sixth aspect, the transceiver unit is further configured to transmit fourth indication information, and the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration or the second related configuration.

[0093] Referring to the sixth aspect, in some implementations of the sixth aspect, when the transceiver unit transmits the fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration; or when the transceiver unit does not transmit the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the second related configuration; or when the transceiver unit transmits the fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the second related configuration; or when the transceiver unit does not transmit the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the first related configuration.

[0094] Referring to the sixth aspect, in some implementations of the sixth aspect, the first parameter is carried in the random access channel configuration information.

[0095] Referring to the sixth aspect, in some implementations of the sixth aspect, the first information includes system information.

[0096] According to a seventh aspect, a communication device is provided. The communication device is configured to implement the method in any one of the first aspect or the third aspect, or any conceivable implementation of the first aspect or the third aspect, or all conceivable implementations of the first aspect or the third aspect.

[0097] According to an eighth aspect, a communication device is provided. The communication device is configured to implement the method in any one of the second aspect or the fourth aspect, or any conceivable implementation of the second aspect or the fourth aspect, or all conceivable implementations of the second aspect or the fourth aspect.

[0098] According to a ninth aspect, a communication device is provided. The device includes a memory configured to store a program; and a processor configured to execute the program stored in the memory. When the program stored in the memory is executed, the processor is configured to execute the method executed by the first terminal device in any one of the first aspect or the third aspect, and any one implementation of the first aspect or the third aspect.

[0099] According to a tenth aspect, a communication device is provided. The device includes a memory configured to store a program; and a processor configured to execute the program stored in the memory. When the program stored in the memory is executed, the processor is configured to execute the method executed by the network device in any one of the second aspect or the fourth aspect, or any one implementation of the second aspect or the fourth aspect.

[0100] According to an eleventh aspect, a computer-readable medium is provided. The computer-readable medium stores program code executable by a device, and the program code includes the method executed by the first terminal device in any implementation of the first aspect or the third aspect.

[0101] According to a twelfth aspect, a computer-readable medium is provided. The computer-readable medium stores program code to be executed by a device, and the program code includes a method executed by a network device in any implementation of the second aspect or the fourth aspect.

[0102] According to a thirteenth aspect, a computer program product including instructions is provided. When the computer program product is executed on a computer, the computer is capable of executing the method in any implementation of the first aspect or the second aspect.

[0103] According to a fourteenth aspect, a chip is provided. The chip includes a processor and a data interface, and the processor reads instructions stored in a memory through the data interface and executes the method in any implementation of the first aspect, the second aspect, the third aspect, or the fourth aspect.

[0104] According to a fifteenth aspect, a system is provided. The system includes any conceivable implementation of the fifth aspect, the sixth aspect, the seventh aspect, the eighth aspect, the ninth aspect, or the tenth aspect, or an apparatus in all conceivable implementations of the fifth aspect, the sixth aspect, the seventh aspect, the eighth aspect, the ninth aspect, or the tenth aspect.

[0105] Optionally, in an implementation, the chip may further include a memory, and the memory stores instructions. The processor is configured to execute the instructions stored in the memory, and when the instructions are executed, the processor is configured to execute the method in any implementation of the first aspect or the second aspect, or the method in the third aspect or the fourth aspect.

[0106] Specifically, the foregoing chip may be a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC).

Brief Description of the Drawings

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Embodiments for Carrying Out the Invention

[0122] Hereinafter, with reference to the accompanying drawings, the technical solution of the present application will be described.

[0123] Embodiments of the present application are applicable to various communication systems, such as Wireless Local Area Network (WLAN) systems, Narrowband Internet of Things (NB-IoT) systems, Global System for Mobile Communications (GSM (registered trademark)) for mobile communication, Enhanced Data Rate for GSM Evolution (EDGE) systems, Wideband Code Division Multiple Access (WCDMA (registered trademark)) systems, Code Division Multiple Access 2000 (CDMA2000) systems, Time Division-Synchronization Code Division Multiple Access (TD-SCDMA) systems, Long Term Evolution (LTE) systems, satellite communication systems, 5th generation (5G) systems, and new communication systems that will emerge in the future.

[0124] With the development of mobile communication technology, people's lives have changed significantly. However, people's pursuit of higher-performance mobile communication technology has not stopped. To cope with the explosive growth of mobile data traffic, the massive connection of mobile communication devices, and various new services and application scenarios that will emerge in the future, the 5G mobile communication system has emerged. The International Telecommunication Union (ITU) has defined three main application scenarios for 5G and future mobile communication systems, namely, enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communications (mMTC).

[0125] Typical eMBB services include ultra-high-definition video, augmented reality (AR), virtual reality (VR), and the like. These services have a large data transmission volume and a very high transmission rate. Typical URLLC services include wireless control in industrial manufacturing or production processes, operation control and remote repair of autonomous vehicles and unmanned aerial vehicles, tactile interaction applications such as remote surgery, and the like. These services have ultra-high reliability, low latency, a small data transmission volume, and burstiness. Typical mMTC services include smart grid distribution automation, smart cities, and the like. These services have a large number of connected network devices, a small amount of data transmission, and data insensitivity to transmission delay. These mMTC terminals need to meet the requirements of low cost and a very long standby period.

[0126] Different services have different requirements for a mobile communication system. How to better support all the data transmission requirements of multiple different services is a technical problem to be solved in the current 5G mobile communication system. For example, how to support both mMTC services and eMBB services, or how to support both URLLC services and eMBB services.

[0127] Research on mMTC in the 5G standard has not been widely carried out.

[0128] Currently, in the said standard, the user equipment (UE) of mMTC services is referred to as reduced capability UE (REDCAP UE), narrow bandwidth user equipment, Internet of Things device, or low-end smart handheld terminal. This type of UE may be less complex than other UEs in terms of bandwidth, power consumption, and the number of antennas. For example, this type of UE has a narrower bandwidth, lower power consumption, and a smaller number of antennas. This type of UE may also be referred to as a lightweight software (NR light, NRL) terminal device. The maximum bandwidth supported by mMTC user equipment is less than 100 MHz. It should be noted that the mMTC user equipment in this application can be not only a machine type communication device but also a smart handheld terminal.

[0129] FIG. 1 is a schematic diagram of the architecture of a mobile communication system in which an embodiment of the present application is used. The mobile communication system includes a radio access network device 120, that is, a network device 120, and at least one terminal device (for example, terminal device 130, terminal device 140, and terminal device 150 in FIG. 1). The terminal device is connected to the radio access network device in a wireless manner, and the radio access network device is connected to the core network device in a wireless or wired manner. The core network device and the radio access network device may be independent and different physical devices, or the functions of the core network device and the logical functions of the radio access network device may be integrated into the same physical device, or a part of the functions of the core network device and a part of the functions of the radio access network device may be integrated into one physical device. The terminal device may be arranged at a fixed position or may be mobile. FIG. 1 is merely a schematic diagram. The communication system may further include another network device, for example, a wireless relay device and a wireless backhaul device not shown in FIG. 1. The number of core network devices, radio access network devices, and terminal devices included in the mobile communication system is not limited to the present embodiment of the present application.

[0130] It should be understood that in the communication system of the present application, the information transmission end may be a network device or a terminal device, and the information reception end may be a network device or a terminal device. This is not limited in the present application as long as the first type of terminal device participates in communication in the communication system.

[0131] In the present embodiment of the present application, an example in which a network device and a first terminal device are used as two interaction parties is used for the description of the solution means. This is not limited in this specification.

[0132] A wireless access network device is an access device used by a terminal device to access a mobile communication system in a wireless manner, and can be a base station Node B, an evolved Node B (eNodeB), a base station, a 5G mobile communication system, a base station in a future mobile communication system, an access node in a Wi-Fi (registered trademark) system, or the like. The specific technology and specific device form of the wireless access network device are not limited in the present embodiment of the present application.

[0133] The terminal device can also be referred to as a terminal, a user equipment UE, a mobile station (MS), a mobile terminal (MT), or the like. The terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless reception and transmission functions, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal for industrial control, a wireless terminal for self-driving, a wireless terminal for remote medical surgery, a wireless terminal for a smart grid, a wireless terminal for transportation safety, a wireless terminal for a smart city, or a wireless terminal for a smart home, etc.

[0134] The wireless access network device and the terminal device can be deployed on the ground, including indoor or outdoor scenarios, and handheld or in-vehicle scenarios; or can be deployed on water; or can be deployed on an aircraft, balloon, or satellite in the air. The applicable scenarios of the wireless access network device and the terminal device are not limited in the present embodiment of the present application.

[0135] The present embodiment of the present application is applicable to downlink signal transmission, uplink signal transmission, or device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is a radio access network device, and similarly, the receiving device is a terminal device. For uplink signal transmission, the transmitting device is a terminal device, and similarly, the receiving device is a radio access network device. For D2D signal transmission, the transmitting device is a terminal device, and similarly, the receiving device is also a terminal device. The signal transmission direction is not limited to the present embodiment of the present application.

[0136] Communication between a radio access network device and a terminal device, and communication between terminal devices may be performed by using a licensed spectrum, may be performed by using an unlicensed spectrum, or may be performed by using both a licensed spectrum and an unlicensed spectrum. A spectrum below 6 GHz, a spectrum above 6 GHz, or both a spectrum below 6 GHz and a spectrum above 6 GHz may be used for communication between a radio access network device and a terminal device, and for communication between terminal devices. The spectrum resources used by the radio access network device and the terminal device are not limited in the present embodiment of the present application.

[0137] To facilitate the understanding of the present application, the random access process will be briefly described. The random access process is as follows.

[0138] The terminal device searches for a synchronization signal and a Physical Broadcast Channel (SSB). By searching for the SSB, the terminal device obtains a Master Information Block (MIB) transmitted by the network device. Based on the MIB, the terminal device acquires time-domain resources and frequency-domain resources in a Control Resource Set (CORESET). In the CORESET, the terminal device detects Downlink Control Information (DCI) for scheduling a System Information Block (SIB) and may receive SIB1 at the time-frequency position indicated by the DCI. In this way, information such as an initial uplink bandwidth part (Initial UL BWP), an initial downlink bandwidth part (Initial DL BWP), a random access preamble list, and a random access opportunity list indicated in SIB1 can be received.

[0139] Based on SIB1, the terminal device transmits a Physical Random Access Channel (PRACH, i.e., Msg1) carrying a random access preamble in a Random Access CHannel occasion (RO) resource related to the SSB.

[0140] When the base station successfully receives the random access preamble and permits the UE's access, the base station transmits a Random Access Response (RAR), i.e., Msg2, to the UE within a preconfigured random access response window.

[0141] In addition, the UE monitors downlink control information (DCI) transmitted on a physical downlink control channel (PDCCH) in a preconfigured RAR window, where the DCI instructs the UE to obtain RAR information from a media access control (MAC) protocol data unit (PDU) carried on a physical downlink shared channel (PDSCH).

[0142] It should be understood that if the base station cannot receive a preamble due to collisions between random access preambles selected by different UEs, poor channel conditions, or the like, the base station does not transmit RAR information. In this case, the UE does not detect DCI and MAC RAR in the RAR window. As a result, the current random access fails.

[0143] After successfully detecting the DCI, the terminal receives a random access response RAR (i.e., Msg2) and transmits a physical uplink shared channel (PUSCH, i.e., Msg3) based on the time-frequency resources indicated by the uplink grant in the random access response. Next, the network device transmits DCI to the terminal device, where the DCI indicates the time-frequency resources for carrying a contention resolution message, i.e., Msg4. The terminal device detects the DCI and receives Msg4.

[0144] Before the Radio Resource Control (RRC) connection is established, it should be noted that the UE needs to receive, in CORESET0, the PDCCH for scheduling SIB1, the PDSCH carrying SIB1, the PDCCH for scheduling SI, the PDSCH carrying SI, the PDCCH for scheduling Msg2, the PDSCH carrying Msg2, the PDCCH for scheduling Msg3, the PDCCH for scheduling Msg4, and the PDSCH carrying Msg4. Before the Radio Resource Control (RRC) connection is established, the UE needs to transmit, in the initial UL BWP, Msg1, the PUSCH carrying Msg3, and the PUCCH for feedback to Msg4.

[0145] To facilitate the understanding of the embodiments of the present application, the related concepts in the present application will be briefly described below.

[0146] 1. The UE in the present application can be classified into a first type of terminal device and a second type of terminal device. The first type of terminal device is, for example, a reduced capability UE (REDCAP UE), and the second type of terminal device can be a legacy UE, for example, an eMBB UE.

[0147] The characteristics of the first type of terminal device are different from those of the second type of terminal device, and the characteristics include one or more of the following: Bandwidth, the number of supported or configured resources, the number of transmit antenna ports and / or the number of receive antenna ports, the number of radio frequency channels, the number of hybrid automatic repeat request (HARQ) processes, the supported peak rate, the applicable scenario, the delay requirement, the processing capability, the protocol release, the duplex mode, the service, and the like. The first characteristic will be described in detail below.

[0148] Regarding the bandwidth, or the channel bandwidth, or the maximum channel bandwidth supported or configured by the terminal device, the bandwidth of the first type of terminal device and the bandwidth of the second type of terminal device are different. For example, the bandwidth of the first type of terminal device can be 20 MHz, 10 MHz, or 5 MHz, and the bandwidth of the second type of terminal device can be 100 MHz. With the development of communication technologies, it can be understood that the maximum channel bandwidth supported by the first type of terminal device may no longer be 20 MHz, 10 MHz, or 5 MHz, but may develop to a wider or narrower bandwidth, such as 3 MHz, 25 MHz, or 50 MHz.

[0149] Regarding the number of resources supported or configured, the number of resources can be the number of RBs, REs, subcarriers, RB groups, REG bundles, control channel elements, subframes, radio frames, slots, mini-slots, and / or symbols. The number of resources supported or configured by the first type of terminal device is different from that of the second type of terminal device. For example, the number of resources supported by the first type of terminal device is 48 RBs, and the number of resources supported by the second type of terminal device is 96 RBs.

[0150] Regarding the number of transmit antenna ports and / or the number of receive antenna ports, the number of transmit antenna ports and / or the number of receive antenna ports of the first type of terminal device is different from that of the second type of terminal device. For example, the number of transmit antenna ports of the first type of terminal device can be 1, and the number of receive antenna ports of the first type of terminal device can be 2; the number of transmit antenna ports of the second type of terminal device can be 2, and the number of receive antenna ports of the second type of terminal device can be 4.

[0151] Regarding the number of radio frequency channels, the number of radio frequency channels of the first type of terminal device is different from that of the second type of terminal device. For example, the number of radio frequency channels of the first type of terminal device can be 1, and the number of radio frequency channels of the second type of terminal device can be 2.

[0152] Regarding the number of HARQ processes, the number of HARQ processes supported by the first type of terminal device is different from that supported by the second type of terminal device. For example, the number of HARQ processes of the first type of terminal device can be 8, and the number of HARQ processes of the second type of terminal device can be 16.

[0153] Regarding the supported peak rate, the maximum peak rate of the first type of terminal device is different from that of the second type of terminal device. For example, the maximum peak rate supported by the first type of terminal device can be 100 Mbps, and the peak rate supported by the second type of terminal device can be 200 Mbps.

[0154] Regarding the applicable scenarios, the first type of terminal device and the second type of terminal device function in different applicable scenarios. For example, the first type of terminal device is applied to industrial wireless sensing, video surveillance, wearable devices, and the like, and the second type of terminal device is applied to mobile communication, video Internet access, and the like.

[0155] Regarding the delay requirements, the first type of terminal device and the second type of terminal device have different transmission delay requirements. For example, the delay requirement of the first type of terminal device can be 500 milliseconds, and the delay requirement of the second type of terminal device can be 100 milliseconds.

[0156] Regarding the processing capabilities, in different subcarrier space (SCS) conditions, the first type of terminal device and the second type of terminal device have different processing speeds in terms of channel or data processing time order. For example, the first type of terminal device does not support complex operations, where complex operations may include artificial intelligence (AI) and virtual reality (VR) rendering. The second type of terminal device supports complex operations. It is understood that the processing capability of the first type of terminal device is lower than that of the second type of terminal device.

[0157] Regarding the protocol release, the first type of terminal device and the second type of terminal device are terminal devices with different protocol releases. For example, the protocol releases supported by the first type of terminal device are Release 17 and protocol releases after Release 17, and the protocol releases supported by the second type of terminal device are protocol releases before Release 17, such as Release 15 or Release 16.

[0158] Regarding the duplex mode, the duplex mode includes half-duplex and full-duplex. For example, the first type of terminal device operates in half-duplex mode, and the second type of terminal device operates in full-duplex mode.

[0159] Regarding the services, the services include, but are not limited to, Internet of Things applications such as video surveillance and mobile broadband MBB. For example, the service supported by the first type of terminal device is video surveillance, and the service supported by the second type of terminal device is mobile broadband MBB. This is not limited in the embodiments of the present application.

[0160] Also, another type of terminal device that supports the technical solution of this application, or a future new type of terminal device, should be understood to fall within the protection scope of this application.

[0161] In this application, the first terminal device may be an example of the first type of terminal device, and the second terminal device may be an example of the second type of terminal device.

[0162] 2. The initial downlink bandwidth part (Initial DL BWP) is indicated in SIB1, includes a CORESET in the frequency range, and becomes effective only after Msg4 is received.

[0163] 3. The initial uplink bandwidth part (Initial UL BWP) is indicated in SIB1, and the uplink channel PRACH, Msg3, and HARQ-ACK feedback of Msg4 in the initial access process are executed within the range of the initial UL BWP.

[0164] 4. CORESET is a control resource set. The terminal device receives downlink control information or downlink data information in the CORESET. When the terminal device does not establish an RRC connection with the peer device, the frequency range for receiving the downlink control channel and the downlink data channel corresponds to CORESET0.

[0165] 5. The downlink bandwidth part (DL BWP) is the downlink operating bandwidth configured by the network device for the terminal device after the terminal device is connected to the network device.

[0166] 6. The uplink bandwidth part (UL BWP) is the uplink operating bandwidth configured by the network device for the terminal device after the terminal device is connected to the network device.

[0167] The terminal device with reduced functionality should be understood as a relative concept, which is not limited in this application. For example, the features of a newly developed type of terminal device in at least one aspect such as bandwidth, the number of antennas, device power consumption, and the like are more complex than those of existing legacy UEs. In this case, the legacy UE is used as the first type of terminal device in this application, and the newly developed type of terminal device is used as the second type of terminal device in this application. Therefore, the newly developed type of terminal device is still applicable to the embodiments of this application and belongs within the protection scope of this application.

[0168] 7. The central frequency is the central frequency of the resource block or the resource block having the central index in the bandwidth.

[0169] The starting resource block (RB) is the resource block having the minimum index in the bandwidth or the first resource block in the bandwidth.

[0170] The ending resource block (RB) is the resource block having the maximum index in the bandwidth or the last resource block in the bandwidth.

[0171] It should be understood that the resources in this application can be symbols, slots, minislots, subframes, or the like. The resources in this application can alternatively be subcarriers, resource blocks, carriers, channel control elements, or the like.

[0172] When the resource in this application is a symbol, the resource unit can be a slot, a short slot, or a subframe. When the resource in this application is a subcarrier, the resource unit is a resource block, a carrier, a channel control element, or the like.

[0173] To facilitate the understanding of the embodiments of this application, related terms are explained in advance.

[0174] In the embodiments of this application, the resource is described differently, such as the first resource or the bandwidth resource.

[0175] The first resource can be an uplink BWP, a downlink BWP, an initial downlink BWP, or an initial uplink BWP. The size of the first resource is equal to or smaller than the maximum channel bandwidth supported by the first terminal device. The first control resource set is represented as CORESET a. For example, before the RRC connection is established, CORESET a is CORESET0. For example, before the RRC connection is established, or after the RRC connection is established, CORESET a can be a common CORESET, and at least one RB in the common CORESET may not be within the range of CORESET0. That is, CORESET a and CORESET0 can be different CORESETs.

[0176] The bandwidth resource can be a BWP, or a resource block whose size is equal to or smaller than the maximum channel bandwidth supported by the first terminal device. For example, the bandwidth resource can be an initial uplink BWP. For example, the bandwidth resource can be an uplink BWP. For example, the bandwidth resource can be a downlink BWP. For example, the bandwidth resource can be an initial downlink BWP. The bandwidth resource in this application is the bandwidth resource of the function-reduced terminal device.

[0177] In this application, the size of the bandwidth resource is equal to or smaller than the maximum channel bandwidth supported by the first terminal device, and the size of the bandwidth resource can be predefined or indicated by the network device. For example, the size can be 5 MHz, or the number of RBs corresponding to 5 MHz at different subcarrier intervals; or 10 MHz, or the number of RBs corresponding to 10 MHz at different subcarrier intervals; or 20 MHz, or the number of RBs corresponding to 20 MHz at different subcarrier intervals.

[0178] The first resource may be equivalent to the bandwidth resource, and it should be understood that the resource determination method in the embodiment is applicable to both the first resource and the bandwidth resource.

[0179] The time unit can be any one of a subframe, a radio frame, a slot, a mini-slot, a symbol, a microsecond, a millisecond, or a second.

[0180] The uplink information includes one or more of a random access preamble, message 3 in the random access process, and a physical uplink control channel for feedback to the contention resolution message.

[0181] Message 3 in the random access process includes one or more of the first transmission of the PUSCH carrying Msg3 (the first transmission of Msg3), the first hop transmission of the first transmission of the PUSCH carrying Msg3 (the first hop transmission of the first transmission of Msg3), the second hop transmission of the first transmission of the PUSCH carrying Msg3 (the second hop transmission of the first transmission of Msg3), the transmission after the first transmission of the PUSCH carrying Msg3 (the retransmission of Msg3, or the repetition of Msg3), the first hop transmission of the transmission after the first transmission of the PUSCH carrying Msg3 (the first hop transmission of the retransmission or repetition of Msg3), and the second hop transmission of the transmission after the first transmission of the PUSCH carrying Msg3 (the second hop transmission of the retransmission or repetition of Msg3).

[0182] The physical uplink control channel for feeding back to the contention resolution message includes one or more of the first transmission (initial transmission) of the PUCCH carrying Msg4, the first-hop transmission of the first transmission of the PUCCH carrying Msg4, the second-hop transmission of the first transmission of the PUCCH carrying Msg4, the transmission after the first transmission of the PUCCH carrying Msg4 (retransmission or repetition), the first-hop transmission of the transmission after the first transmission of the PUCCH carrying Msg4, and the second-hop transmission of the transmission after the first transmission of the PUCCH carrying Msg4.

[0183] The UE receives one or more of downlink control information, downlink shared channel, demodulation reference signal, positioning reference signal, and the like in the downlink BWP. The UE transmits one or more of the uplink control channel, uplink shared channel, random access channel, uplink demodulation reference signal, and sounding reference signal in the uplink BWP. For a UE that can perform downlink reception and uplink transmission simultaneously, the UE transmits uplink information on the uplink BWP and receives downlink information on the downlink BWP. The uplink BWP and the uplink BWP may have different frequency ranges. For example, a frequency division duplexing (FDD) UE can perform downlink reception and uplink transmission simultaneously. For example, a UE capable of decoupling uplink and downlink in time division duplexing (TDD) can perform downlink reception and uplink transmission simultaneously. For example, before the UE establishes an RRC connection, the UE needs to transmit one or more of Msg1, the PUSCH carrying Msg3, the retransmitted PUSCH carrying Msg3, and the PUCCH for feeding back to Msg4 on the initial UL BWP.

[0184] The UE transmits a random access preamble in a random access channel opportunity (RACH occasion, RO). In the time domain, for one PRACH transmission opportunity, up to 8 RACH opportunities can be configured in frequency division multiplexing. For example, the subcarrier spacing of PRACH is 30 kHz, the bandwidth of one RO is 4.32 MHz, and the total bandwidth of 8 ROs in frequency division multiplexing is 34.56 MHz. There is a mapping relationship between the SSB and the RO. The number of ROs in each SSB is configured by using the parameters in System Information Block 1, and the SSB is first mapped to the RO in the time domain and then to the frequency domain. For example, two ROs are mapped to the same SSB, the subcarrier spacing is 30 kHz, the number of ROs in frequency division multiplexing is 8, and the number of SSBs is 8. The frequency range of 8 ROs in frequency division multiplexing can exceed the maximum channel bandwidth supported by the reduced-function terminal device. When accessing the cell, the UE acquires one SSB and transmits the PRACH in the RO corresponding to the SSB. For example, after transmitting the PRACH, the UE then transmits the PUSCH carrying Msg3. If the total frequency range corresponding to the frequency in the frequency range where Msg1 is transmitted and the frequency range where the PUSCH carrying Msg3 is transmitted exceeds the maximum channel bandwidth of the UE, frequency adjustment needs to be performed after the PRACH is transmitted to transmit the PUSCH carrying Msg3. For FDD UEs or UEs capable of TDD uplink and downlink decoupling, the frequency adjustment occurs when receiving adjacent downlink information.

[0185] Frequency adjustment reduces the symbols available for data transmission, reduces resource utilization efficiency, increases the power consumption of the UE, and increases the implementation complexity of the UE. In addition, when bandwidth resources are configured in such a way that any RB can be used as the starting RB of the bandwidth resource and any resource size can be used as the length of the bandwidth resource, since the maximum channel bandwidth supported by the function-reduced terminal device is smaller than the carrier bandwidth, the function-reduced terminal device needs to store all possible configurations. This results in a very high complexity of computing the bandwidth resources by the UE.

[0186] To solve the above problems, embodiments of the present application provide an information transmission method shown in FIG. 2.

[0187] 200: The network device transmits indication information to the first terminal device, where the indication information may indicate a first resource, and the indication information may include a first reference point or may include a first bandwidth. The first reference point may be used to determine the position of the first resource, and the first bandwidth may be the size of the bandwidth of the first resource.

[0188] 200 is optional, and it should be understood that the first reference point and the first bandwidth may also be predefined. This is not limited in the present application.

[0189] 201: The first terminal device determines the first resource based on the first reference point and / or the first bandwidth, where the size of the first resource is equal to or smaller than the maximum channel bandwidth supported by the first terminal device.

[0190] 202: The first terminal device transmits uplink information or receives downlink information in the first resource.

[0191] As shown in FIG. 3, the indication information may simultaneously indicate the first reference point and the first bandwidth, or as shown in FIG. 4, the first reference point and the first bandwidth may be indicated separately. It should be understood that one piece of indication information may indicate the first reference point, and a separate piece of indication information may indicate the first bandwidth; or one piece of indication information may indicate the first bandwidth, and a separate piece of indication information may indicate the first reference point; or the indication information may indicate only the first reference point, or may indicate only the first bandwidth.

[0192] It should be understood that the information about the first reference point and / or about the first bandwidth may alternatively be carried in other information, and other equivalent alternative solutions also fall within the protection scope of this application.

[0193] For example, the network device may first receive channel state information (CSI) from the first terminal device, where the CSI includes information about the sub-band size, and the network device determines the bandwidth of the first resource of the first terminal device based on the sub-band size.

[0194] It should be understood that the first reference point may be used as the position of the first resource, or the position of the first resource may be determined based on the first reference point and the first offset.

[0195] The first bandwidth, the first offset, and the first reference point may alternatively be pre-defined. This is not limited in this application.

[0196] The first bandwidth may be determined based on the sub-band size reported by the CSI, the sub-carrier spacing, and one or more of the bandwidths supported by the first terminal device.

[0197] Alternatively, the first offset may be determined based on the sub-band size reported by the CSI, the sub-carrier spacing, and one or more of the first bandwidths supported by the first terminal device.

[0198] Specifically, the first bandwidth can be configured based on the first configuration information, the first offset can be configured based on the second configuration information, and the first reference point can be configured based on the third configuration information. The first configuration information, the second configuration information, and the third configuration information can be carried in different information or can be carried in the same information, for example, can be carried in SIB1.

[0199] In a possible implementation, the first resource is determined based on the bandwidth supported by the first terminal device.

[0200] The bandwidth supported by the first terminal device can be the channel bandwidth or can be the transmission bandwidth corresponding to the channel bandwidth. For example, the bandwidth supported by the first terminal device can be 5 MHz, 10 MHz, 20 MHz, or the number of RBs corresponding to 5 MHz, 10 MHz, or 20 MHz with different subcarrier spacings.

[0201] When the bandwidth supported by the first terminal device is the first channel bandwidth, the first channel bandwidth is one of the maximum channel bandwidths supported by the first terminal device. For example, the first channel bandwidth can be the minimum bandwidth in the maximum channel bandwidth supported by the first terminal device. For example, the maximum channel bandwidths supported and reported by the first terminal device can be 5 MHz, 10 MHz, 15 MHz, and 20 MHz, and the first channel bandwidth can be one of 5 MHz, 10 MHz, 15 MHz, and 20 MHz. The minimum bandwidth in the maximum channel bandwidth supported and reported by the first terminal device is 5 MHz. In other words, the first channel bandwidth can also be 5 MHz.

[0202] In a possible implementation, the first bandwidth can be determined based on a positive integer multiple of the bandwidth supported by the first terminal device. For example, the first bandwidth is determined based on a positive integer multiple of 5 MHz. The bandwidth supported by the first terminal device may be the first transmission bandwidth, and the first transmission bandwidth is the number of resource blocks corresponding to the first channel bandwidth at different subcarrier intervals. For example, the correspondence between the first channel bandwidth and the first transmission bandwidth at different subcarrier intervals is shown in Table 1.

[0203] When the subcarrier interval is 15 kHz, the first transmission bandwidth corresponding to a bandwidth of 5 MHz is 25 RBs. Similarly, the first bandwidth can be determined based on a positive integer multiple of 25 RBs, for example, 25 RBs, 50 RBs, 75 RBs, or 100 RBs. In another example, when the subcarrier interval is 30 kHz, the first transmission bandwidth corresponding to 5 MHz is 11 RBs, and the first bandwidth can be determined based on a positive integer multiple of 11 RBs. In another example, the first bandwidth can be determined based on a positive integer multiple of 10 RBs. In another example, when the subcarrier interval is 60 kHz, the first transmission bandwidth corresponding to 10 MHz is 11 RBs. In this case, the bandwidth can be determined based on a positive integer multiple of 11 RBs. Table 1 Table of the relationship between the subcarrier interval and the number of RBs corresponding to the bandwidth supported by the first terminal device

Table 1

[0204] It should be understood that Table 1 is merely an example. It is not limited in this application.

[0205] In a possible implementation, when the position of the first resource is determined based on the first reference point and the first offset, the method for determining the first offset is the same as the method in the foregoing embodiments, and the details will not be described again herein.

[0206] In another possible implementation, when the bandwidth supported by the first terminal device is the first transmission bandwidth, resource blocks other than positive integer multiples of the first transmission bandwidth are used to transmit the first control channel. Resource blocks other than positive integer multiples of the first transmission bandwidth include the first transmission resource and / or the second transmission resource. As shown in FIG. 5, the first transmission resource is M1 resource blocks having the minimum index in the second resource, the second transmission resource is M2 resource blocks having the maximum index in the second resource, M1 and M2 are positive integers respectively, and the second resource is the BWP of the second type of terminal device or the carrier bandwidth corresponding to different subcarrier intervals.

[0207] For example, the first control channel may include the first-hop transmission of the PUCCH for feedback to Msg4, or may be the second-hop transmission of the PUCCH for feedback to Msg4. Alternatively, the first control channel may be the first-hop transmission and the second-hop transmission of the PUCCH for feedback to Msg4.

[0208] Specifically, when the subcarrier interval is 15 kHz, the first transmission bandwidth corresponding to 5 MHz is 25 RBs, the number of RBs corresponding to the maximum channel bandwidth of 50 MHz is 270 RBs, positive integer multiples of the first transmission bandwidth are used as the first bandwidth, and positive integer multiples of the first transmission bandwidth are used as the first offset. For example, the first bandwidth may be 25 RBs and the first offset may be 25 RBs. When the subcarrier interval is 15 kHz, up to 10 first bandwidths can be formed, with a total of 250 RBs, and the number of RBs corresponding to the maximum channel bandwidth of 50 MHz is 270 RBs. The remaining 20 RBs are distributed at both ends of the carrier. In this case, the first transmission resource may be M1 resource blocks having the minimum index in the second resource, and the second transmission resource may be M2 resource blocks having the maximum index in the second resource.

[0209] In the foregoing solution, the first bandwidth is used as a granularity. In one aspect, the optional range of the bandwidth can be greatly reduced, and in another aspect, the bandwidth can be used as the minimum bandwidth configured when the energy consumption of the UE is reduced.

[0210] In a possible implementation, the first resource and / or the first offset are determined based on the sub-band size reported by the CSI.

[0211] For example, the sub-band size reported by the CSI is a multiple of 4 RBs. For example, the network device determines the first bandwidth based on the sub-band size reported by the CSI. The first bandwidth can be a multiple of 4 RBs. As shown in FIG. 6, the first bandwidth can be 4 RBs, or can be 8 RBs, 16 RBs, or the like. In another example, the network device determines the first offset based on the sub-band size reported by the CSI. The first offset can be a multiple of 4 RBs and can be 4 RBs, 8 RBs, 16 RBs, or the like.

[0212] Compared with those having a bandwidth that is not a multiple of 4 RBs, the number of sub-bands reported by the UE is reduced, and the complexity of the UE's report is reduced.

[0213] In a possible implementation, the first resource and / or the first offset are determined based on the sub-band size reported by the CSI and the resource allocation granularity of the control resource set. The first resource and / or the first offset can be determined based on the least common multiple of the sub-band size reported by the CSI and the resource allocation granularity of the control resource set. For example, the sub-band size reported by the CSI can be 4 RBs, and the resource allocation granularity of the CORESET can be 6 RBs. The least common multiple of 2, which is the number of the foregoing RBs, for example, a multiple of 12 RBs, can be used as the first bandwidth and / or the first offset.

[0214] In a possible implementation, the first resource and / or the first offset may be determined based on the sub-band size reported by the CSI and the granularity of the resource block group. The first resource and / or the first offset is determined based on the least common multiple of the sub-band size reported by the CSI and the granularity of the resource block group. For example, the sub-band size reported by the CSI may be 4 RBs, and the resource block group may include a number of RBs that is a power of 2. The least common multiple of the number of RBs included in the above two items, for example, a multiple of 4 number of RBs, may be used as the first bandwidth and / or the first offset.

[0215] In another possible implementation, the first resource and / or the first offset is determined based on the sub-band size reported by the CSI, the resource allocation granularity of the control resource set, and the granularity of the resource block group. The first resource and / or the first offset is determined based on the least common multiple of the sub-band size reported by the CSI, the resource allocation granularity of the control resource set, and the granularity of the resource block group. For example, the sub-band size reported by the CSI may be 4 RBs, the resource allocation granularity of the CORESET may be 6 RBs, and the resource block group may include a number of RBs that is a power of 2. The least common multiple of the number of RBs included in the above multiple items, for example, a multiple of 12 number of RBs, may be used as the first bandwidth and / or the first offset.

[0216] In the above solution, the bandwidth of the first resource is determined based on the sub-band size reported by the CSI. This solves the problem that the inconsistency between the sub-band and the bandwidth of the first resource causes an increase in the number of sub-bands reported by the UE, adds the resource allocation granularity of the CORESET and the resource block group as the basis for configuring the first bandwidth, and avoids the waste of resources caused by the inconsistency between the first bandwidth and the sub-band size reported by the CSI, the resource allocation of the CORESET, and the resource allocation of the data channel type 0. As shown in FIG. 7, it reduces the complexity of the CSI report by the UE.

[0217] It should be understood that the above solution can be combined with the above implementation. For example, in the range of 25 RBs, 12 multiples, for example, 24 RBs are used as the first offset, so as to avoid the inconsistency described above and reduce the bandwidth indication range.

[0218] In a possible implementation, the first bandwidth and the first offset in the above embodiment may be associated with the sub-carrier spacing. There is a first association relationship between the first bandwidth and the sub-carrier spacing; and / or there is a second association relationship between the first offset and the sub-carrier spacing. For example, the first association relationship may be that a larger sub-carrier spacing indicates a smaller first bandwidth. In another example, the second association relationship may be that a larger sub-carrier spacing indicates a smaller first offset. Alternatively, the first association relationship may be that a larger sub-carrier spacing indicates a proportional decrease in the size of the first resource. In another example, the second association relationship may be that a larger sub-carrier spacing indicates a proportional decrease in the first offset.

[0219] For example, at 15 kHz, the first offset can be 24 RBs; at 30 kHz, the first offset can be 12 RBs; or at 60 kHz, the first offset can be 6 RBs. For example, at 15 kHz, the first offset can be 24 RBs; at 30 kHz, the first offset can be 6 RBs; or at 60 kHz, the first offset can be 4 RBs. For example, at 15 kHz, the first offset can be 12 RBs; at 30 kHz, the first offset can be 6 RBs; or at 60 kHz, the first offset can be 4 RBs.

[0220] In this solution, the number of RBs included in the same bandwidth is considered different when the subcarrier intervals are different. When NR supports different subcarrier intervals, the first resource can also be configured by using the solution in this application.

[0221] In a possible implementation, the first terminal device determines the first resource based on the first reference point.

[0222] For example, the first terminal device may receive indication information, where the indication information indicates the first reference point, and the first reference point can be the first RB of the second resource, the center frequency or center subcarrier of the second resource, the last RB of the second resource, the common resource block 0, and one or more of point A. The indication information can be carried in SIB1 or PDCCH for scheduling SIB1.

[0223] The second resource is a resource configured for the second type of terminal device, and the number of resource blocks included in the second resource may be greater than the number of resource blocks corresponding to the maximum channel bandwidth of the first terminal device. For example, the second resource is the carrier bandwidth, or the number of RBs corresponding to the carrier at different subcarrier intervals, or the second resource can be the BWP of the second type of terminal device.

[0224] It should be understood that the first terminal device can alternatively determine the first reference point in a predefined manner. The first reference point can be one or more of the first RB of the second resource, the center frequency or center subcarrier of the second resource, the last RB of the second resource, the common resource block 0, and point A.

[0225] In a possible implementation, the positions of the start RB and end RB of the second resource can be indicated by using signaling. As shown in FIG. 8, two of the candidate bandwidths in multiple candidate bandwidths are the end RB of the second resource and are used as reference points, and the other three candidate bandwidths are the start RB of the second resource and are used as reference points.

[0226] In another possible implementation, the position of the start RB or end RB of the second resource can be indicated by using signaling, and the candidate bandwidths are continuously determined by using the indicated reference points.

[0227] It should be understood that the numbers in this specification, the correspondence between the numbers and the start RB, and the correspondence between the numbers and the end RB are merely examples and are not limited in this specification.

[0228] In another possible implementation, CRB0 (point A) can be used as a reference point, and the start point of the first resource is determined based on the reference point.

[0229] In this solution, the reference point is provided to configure the first resource, and it avoids the waste of resources that occurs when the first resource occupies less than 1RB in some frequency regions.

[0230] In yet another possible implementation, when the first terminal device and the second terminal device share a BWP, the reference point is determined by considering both the position of the second resource and the start position of the CRB, and the frequency position aligned with the CRB resource can be used as the reference point. For example, as shown in Fig. 9(a), the reference point is not necessarily at the position of the start RB or end RB of the second resource.

[0231] This solution can flexibly determine the start position of the first resource, reduce the overhead of instructions, and avoid resource allocation inconsistencies.

[0232] In yet another possible implementation, the frequency domain offset of the first resource is configured based on one or more of the sub-band size reported by CSI, the resource allocation granularity of the CORESET, the resource block group (RBG), the sub-carrier spacing, and the minimum channel bandwidth supported by the first terminal device. The offset can be the RB offset of the start position of the first resource relative to the position of the second resource.

[0233] For example, as shown in Fig. 9(b), when the first reference point (start_RB) is at the position of the start RB of the second resource, the start position of the first resource can be MOD(start_RB + the first offset, BW).

[0234] When start_RB is at the position of the end RB of the second resource, the start position of the first resource can be MOD(start_RB + the first offset, BW) or MOD(BW, start_RB - the first offset). BW is the bandwidth of the second resource or the carrier bandwidth.

[0235] The first reference point and the first offset can be determined by using the solution means in the foregoing embodiment, and the details will not be described again herein. For example, the first offset can be an integer multiple of 25 RBs, the RB position of start_RB + the first offset can be index * 25, and the index is {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}.

[0236] If the first offset is not shown, start_RB is used as the starting position of the first resource by default.

[0237] The first terminal device receives the second information transmitted by the network device, where the second information indicates at least two of the first bandwidth, the first reference point, and the first offset. That is, the network device jointly encodes at least two of the first bandwidth, the first reference point, and the first offset. For example, optionally, the first bandwidth can be 5 MHz, 10 MHz, or 20 MHz (or, 25 RBs, 50 RBs, or 100 RBs), and the first offset is an integer multiple of 25 RBs. In this case, a total of 30 states need to be shown, and 5 bits are required.

[0238] In this solution means, considering comprehensively the complexity and flexibility of the indication, the bit overhead for the first resource can be reduced, and the computing complexity of the UE can be reduced.

[0239] In another embodiment of the present application, the first reference point is used as the reference point for the position of the first bandwidth and can be the position of the first random access resource. In other words, the position of the first resource is determined based on the position of the first random access resource, and the first terminal device transmits the first uplink information on the first resource.

[0240] The size of the first resource (i.e., the first bandwidth) is equal to or smaller than the maximum channel bandwidth supported by the first terminal device, and the first random access resource is a random access resource available to the first terminal device. The random access resource available to the first terminal device may be a random access resource configured by the network device for the first terminal device.

[0241] Specifically, the first uplink information includes all uplink information transmitted in the random access phase; or the first uplink information includes the first transmission of the PUSCH carrying Msg3 (the first transmission of Msg3), the first hop transmission of the first transmission of the PUSCH carrying Msg3 (the first hop transmission of the first transmission of Msg3), the transmissions after the first transmission of the PUSCH carrying Msg3 (transmissions after the first transmission of Msg3, including retransmissions or repetitions of Msg3), the first hop transmission of the transmissions after the first transmission of the PUSCH carrying Msg3 (the first hop transmission of the transmissions after the first transmission of Msg3), the first transmission of the PUCCH of Msg4 (the first transmission of the PUCCH of Msg4), the first hop transmission of the first transmission of the PUCCH of Msg4 (the first hop transmission of the first transmission of the PUCCH of Msg4), the transmissions after the first transmission of the PUCCH of Msg4 (transmissions after the first transmission of the PUCCH of Msg4), and the first hop transmission of the transmissions after the first transmission of the PUCCH of Msg4 (the first hop transmission of the transmissions after the first transmission of the PUCCH of Msg4).

[0242] The position of the first random access resource includes the first RB of the first random access resource; or, the position of the first random access resource includes the last RB of the first random access resource; or, the position of the first random access resource includes the central RB of the first random access resource; or, the position of the first random access resource includes the first sub - carrier of the first RB of the first random access resource; or, the position of the first random access resource includes the first sub - carrier of the last RB of the first random access resource; or, the position of the first random access resource includes the first sub - carrier of the central RB of the first random access resource; or, the position of the first random access resource includes the last sub - carrier of the first RB of the first random access resource; or, the position of the first random access resource includes the last sub - carrier of the last RB of the first random access resource; or, the position of the first random access resource includes the last sub - carrier of the central RB of the first random access resource.

[0243] It should be understood that the size of the first random access resource can be predefined.

[0244] The position of the first resource includes the first RB of the first resource; or, the position of the first resource includes the last RB of the first resource; or, the position of the first resource includes the central RB of the first resource; or, the position of the first resource includes the first sub - carrier of the first RB of the first resource; or, the position of the first resource includes the first sub - carrier of the last RB of the first resource; or, the position of the first resource includes the first sub - carrier of the central RB of the first resource; or, the position of the first resource includes the last sub - carrier of the first RB of the first resource; or, the position of the first resource includes the last sub - carrier of the last RB of the first resource; or, the position of the first resource includes the last sub - carrier of the central RB of the first resource.

[0245] In this application, the first position is used to represent the reference position of the first resource.

[0246] It should be understood that the position of the first random access resource may be predefined or indicated by using signaling.

[0247] For example, the first terminal device determines the position of the first resource based on the predefined position of the first random access resource. For example, the predefined position of the first random access resource may be the position of the nth random access resource, and the index corresponding to the random access resource is n - 1, where n is a positive integer. As shown in FIG. 10, the predefined position of the first random access resource may be the last RB of the fourth random access resource, or the last subcarrier of the last RB. Alternatively, the predefined position of the first random access resource may be the first RB of the fifth random access resource or the first subcarrier of the first RB. The predefined position of the first random access resource is used as the start position of the position of the first resource. The first RB of the fifth random access resource or the first subcarrier of the first RB is determined as the first RB of the first resource or the first subcarrier of the first RB. The predefined position of the first random access resource is used as the end position of the position of the first resource.

[0248] The position of the first random access resource may also be indicated by using the first signaling. The first signaling may be carried in one of the system information block 1 (SIB1), DCI for scheduling SIB1, random access response (RAR), DCI for scheduling RAR, uplink grant for scheduling Msg3, Msg3, contention resolution message, and DCI for scheduling the contention resolution message. The first signaling may also be the bits or bit states of the foregoing information.

[0249] Embodiments of the present application provide an information transmission method as shown in FIG. 11.

[0250] 1101: The network device transmits the first information and the first parameter to the first terminal device, where the first information indicates M bandwidth resources, M is a positive integer, the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit, the first terminal device is a first type of terminal device, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device.

[0251] It should be understood that 1101 is optional, and the first information and the first parameter can also be predefined.

[0252] 1102: The first terminal device acquires the first information and the first parameter, and the first terminal device determines the first bandwidth resource based on the first information and the first parameter.

[0253] It should be understood that the first information can be system information, for example, system information block 1 (SIB 1).

[0254] 1103: The first terminal device transmits uplink information or receives downlink information on the first bandwidth resource.

[0255] Specifically, the first parameter can be included in the random access channel configuration information.

[0256] The random access channel configuration information can further include other information of the PRACH. For example, the random access channel opportunity is a PRACH transmission opportunity, and the first terminal device transmits a random access preamble in the PRACH transmission opportunity. In another example, the slot in which the first terminal device can transmit the PRACH can include one or more PRACH transmission opportunities in the time domain, and each PRACH transmission opportunity is one time unit.

[0257] The first parameter may indicate the number of PRACH transmission opportunities for frequency division multiplexing in one PRACH opportunity. One slot may include one or more time units. When one slot includes a plurality of time units, one time unit may be s symbols, where s is a positive integer greater than 1. In this case, the first parameter may indicate the number of PRACH transmission opportunities for frequency division multiplexing in the frequency within one time unit. The value of the first parameter may be 1, 2, 4, 8, or the like.

[0258] For example, when the value of the first parameter is 8, there are 8 random access channel opportunities for frequency division multiplexing in one time unit, and the indexes of the 8 random access channel opportunities may be arranged as 0 to 7 in ascending order of frequency resources.

[0259] In a possible implementation, the size of each of the M bandwidth resources may be predefined or indicated by a network device. For example, the size of each bandwidth resource may be 5 MHz, or the number of RBs corresponding to 5 MHz at different subcarrier intervals; or 10 MHz, or the number of RBs corresponding to 10 MHz at different subcarrier intervals; or 20 MHz, or the number of RBs corresponding to 20 MHz at different subcarrier intervals.

[0260] In a possible implementation, when M = 2, one of the two bandwidth resources includes the resources of random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource includes the resources of random access channel opportunities {4, 5, 6, 7}. Based on that each of the two bandwidth resources does not exceed the maximum channel bandwidth supported by the first terminal device, the two bandwidth resources may include all the resources of random access channel opportunities, and the first terminal device may determine the center frequency for transmitting the PRACH based on the bandwidth resources. Thereby, the number of frequency adjustment times can be reduced.

[0261] In another possible implementation, when M>1, the first terminal device may obtain first signaling, where the first signaling indicates a first bandwidth resource among M bandwidth resources; based on the first bandwidth resource, the other (M-1) bandwidth resources among the M bandwidth resources may be determined.

[0262] For example, the first bandwidth resource is the bandwidth resource at the lowest position when the frequency resources are sorted in ascending order of position. The first bandwidth resource may be configured by constituting a start position and a resource size. The remaining (M-1) bandwidth resources may be continuously sorted by using the end resource block of the first bandwidth resource as the start resource block. In this way, the M bandwidth resources may be determined continuously. The configuration of the bandwidth resources is more flexible without considering the position of the RO.

[0263] In a possible implementation, when the value of the first parameter is greater than 4 and M = 1, the bandwidth resource is the first bandwidth resource of the first terminal device, and the first bandwidth resource may include predefined resources of N random access channel opportunities. The number of random access channel opportunities, which is the first parameter, includes N random access channel opportunities, where N is a positive integer.

[0264] For example, when the value of the first parameter is 8 and the first information indicates that only one bandwidth resource is configured for the first terminal device, the bandwidth resource is the first bandwidth resource of the first terminal device. The first bandwidth resource may include predefined resources for N random access channel opportunities, and the resources for N random access channel opportunities belong to the random access channel opportunities whose number is the first parameter, where N is a positive integer. The predefined resources for N random access channel opportunities may be the resources for N lower random access channel opportunities sorted in ascending order of frequency resource positions. Specifically, N = 4, and the value of the first parameter may be 8. The predefined resources for N random access channel opportunities need to include the resources for the random access channel opportunities where the random access preamble is transmitted. This solution reduces the bit overhead, ensures that frequency adjustment does not need to be performed for the transmission of the random access preamble, and may reduce the number of frequency adjustment times. For example, the first bandwidth resource is determined based on the resources for the random access channel opportunities where the random access preamble is transmitted. The first bandwidth resource is a resource that starts from the first RB or the first subcarrier of the first RB of the resources for the random access channel opportunities where the random access preamble is transmitted; or, the first bandwidth resource is determined based on the resources for the random access channel opportunities where the random access preamble is transmitted; or, the first bandwidth resource is a resource that ends at the last RB or the last subcarrier of the last RB of the resources for the random access channel opportunities where the random access preamble is transmitted. The possible scenarios of this solution are as follows: The first type of terminal device and the second type of terminal device receive the same system information, receive the same first parameter, and constitute only one bandwidth resource.

[0265] It should be understood that the scenario is an example and is not limited in this application.

[0266] In a possible implementation, when the value of the first parameter is greater than 4 and M = 1, the bandwidth resource is the first bandwidth resource of the first terminal device, and the first terminal device further obtains first indication information, where the first indication information may indicate a first random access channel opportunity. The start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity. For example, when the value of the first parameter is 8 and the first information indicates that only one bandwidth resource is configured for the first terminal device, the bandwidth resource is the first bandwidth resource of the first terminal device. The start resource block of the first bandwidth resource may be determined based on the first indication information. For example, the first random access channel opportunity is a random access channel opportunity with an index of r, where r is an integer greater than or equal to 0. The fact that the start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity may also be understood as the frequency position of the start resource block of the first bandwidth resource being aligned with the frequency position of the start resource block of the first random access channel opportunity. For example, N = 4 and the value of the first parameter may be 8. A possible scenario of this solution is as follows: The first type of terminal device and the second type of terminal device receive the same system information, receive the same first parameter, and constitute only one bandwidth resource.

[0267] For example, the first indication information may include 1 bit, and the first indication information may indicate the index of the first random access channel opportunity at the random access channel opportunity index {0, 4}. When the first indication information indicates index 0, the first bandwidth resource may include resources where the random access channel opportunity index is {0, 1, 2, 3}. When the first indication information indicates index 4, the first bandwidth resource may include resources where the random access channel opportunity index is {4, 5, 6, 7}. For example, the first bandwidth resource is indicated based on the resource of the random access channel opportunity where the random access preamble is transmitted. The first bandwidth resource is a resource that starts with the first resource block (RB) or the first sub-carrier of the first RB of the resource of the random access channel opportunity where the random access preamble is transmitted; or, the first bandwidth resource is determined based on the resource of the random access channel opportunity where the random access preamble is transmitted; or, the first bandwidth resource is a resource that ends with the last RB or the last sub-carrier of the last RB of the resource of the random access channel opportunity where the random access preamble is transmitted. The two possible positions of the first bandwidth resource shown in this solution may include all the resources of the random access channel opportunity. This ensures that no frequency adjustment needs to be performed for the transmission of the random access preamble and may reduce the number of frequency adjustment times.

[0268] The index of RO is shown in FIG. 12.

[0269] For example, the first indication information may include 2 bits, and the first indication information indicates the index of the first random access channel opportunity in the random access channel opportunity index {1, 2, 3, 4}. When the first indication information indicates index 1, the first bandwidth resource may include resources where the random access channel opportunity index is {1, 2, 3, 4}. When the first indication information indicates index 2, the first bandwidth resource may include resources where the random access channel opportunity index is {2, 3, 4, 5}. When the first indication information indicates index 3, the first bandwidth resource may include resources where the random access channel opportunity index is {3, 4, 5, 6}. When the first indication information indicates index 4, the first bandwidth resource may include resources where the random access channel opportunity index is {4, 5, 6, 7}. The four possible positions of the first bandwidth resource shown in this solution means can all include resources for all random access channel opportunities. This ensures that no frequency adjustment needs to be performed for the transmission of the random access preamble, reduces the number of frequency adjustment times, and can have a more flexible indication.

[0270] For example, the first indication information may further include three bits, and the first indication information indicates the index of the first random access channel opportunity in the random access channel opportunity index {0, 1, 2, 3, 4}. When the first indication information indicates index 0, the first bandwidth resource may include resources where the random access channel opportunity index is {0, 1, 2, 3}. When the first indication information indicates index 1, the first bandwidth resource may include resources where the random access channel opportunity index is {1, 2, 3, 4}. When the first indication information indicates index 2, the first bandwidth resource may include resources where the random access channel opportunity index is {2, 3, 4, 5}. When the first indication information indicates index 3, the first bandwidth resource may include resources where the random access channel opportunity index is {3, 4, 5, 6}. When the first indication information indicates index 4, the first bandwidth resource may include resources where the random access channel opportunity index is {4, 5, 6, 7}. The five possible positions of the first bandwidth resource shown in this solution means may all include resources for all random access channel opportunities. This ensures that no frequency adjustment needs to be performed for the transmission of the random access preamble, reduces the number of frequency adjustment times, and can have a more flexible indication.

[0271] For example, the first indication information includes 3 bits, and the first indication information may further indicate the index of the first random access channel opportunity in the random access channel opportunity index {0, 1, 2, 3, 4, 5, 6, 7}. When the first indication information indicates index 0, the first bandwidth resource may include resources where the random access channel opportunity index is {0, 1, 2, 3}. When the first indication information indicates index 1, the first bandwidth resource may include resources where the random access channel opportunity index is {1, 2, 3, 4}. When the first indication information indicates index 2, the first bandwidth resource may include resources where the random access channel opportunity index is {2, 3, 4, 5}. When the first indication information indicates index 3, the first bandwidth resource may include resources where the random access channel opportunity index is {3, 4, 5, 6}. When the first indication information indicates index 4, the first bandwidth resource may include resources where the random access channel opportunity index is {4, 5, 6, 7}. When the first indication information indicates index 5, the first bandwidth resource may include resources where the random access channel opportunity index is {5, 6, 7}. When the first indication information indicates index 6, the first bandwidth resource may include resources where the random access channel opportunity index is {6, 7}. When the first indication information indicates index 7, the first bandwidth resource may include resources where the random access channel opportunity index is {7}. The eight possible positions of the first bandwidth resource shown in this solution may include all random access channel opportunity resources. This ensures that no frequency adjustment needs to be performed for the transmission of the random access preamble, reduces the number of frequency adjustment times, and enables more flexible indication.

[0272] For example, the index of the first random access channel opportunity may also be determined based on whether the first indication information exists. The non-existence of the first indication information may also be understood as the first terminal device not obtaining the first indication information. For example, the first indication information may be default. When the first indication information is default, the first random access channel opportunity is a random access channel opportunity with an index of 0. This solution means can be combined with the foregoing embodiments. For example, this solution means can be applied when the first indication information may include 2 bits. When the first indication information is default, the first random access channel opportunity is a random access channel opportunity with an index of 0; or, when the first indication information includes 2 bits, the first indication information indicates the index of the first random access channel opportunity among the random access channel opportunity indexes {1, 2, 3, 4}.

[0273] In a possible implementation, when the value of the first parameter is greater than 4 and M>1, each of the M bandwidth resources includes one or more resources of the first parameter random access channel opportunity, and the first terminal device determines the first bandwidth resource from the M bandwidth resources. The possible scenarios of this solution means are as follows. The first type of terminal device and the second type of terminal device receive the same system information, receive the same first parameter, and constitute a plurality of bandwidth resources.

[0274] It should be understood that the scenario is an example. This is not limited in this application.

[0275] The different bandwidth resources among the M bandwidth resources can be understood to include different resources of random access channel opportunities. For example, the value of the first parameter is 8, and the first information is that two bandwidth resources are configured for the first terminal device. Each of the two bandwidth resources includes one or more of 8 random access channel opportunities. For example, as shown in FIG. 13, one of the two bandwidth resources includes a random access channel opportunity resource with indexes {0, 1, 2, 3}, and the other bandwidth resource includes a random access channel opportunity resource with indexes {4, 5, 6, 7}. The first terminal device may determine the first bandwidth resource from the two bandwidth resources. The first bandwidth resource may be a bandwidth resource with indexes {0, 1, 2, 3}, or may be a bandwidth resource with indexes {4, 5, 6, 7}. The first bandwidth resource may be determined based on the random access channel opportunity resource where the random access preamble is transmitted. This solution reduces bit overhead, ensures that frequency adjustment is not required for the transmission of the random access preamble, and may reduce the number of frequency adjustment times.

[0276] In a possible implementation, the first terminal device receives second indication information, where the second indication information may indicate a second bandwidth resource among the M bandwidth resources. The second bandwidth resource may be different from the first bandwidth resource. That is, the random access channel opportunity resources included in the second bandwidth resource are not exactly the same as the random access channel opportunity resources included in the first bandwidth resource. Alternatively, the second bandwidth resource may be the same as the first bandwidth resource. That is, the random access channel opportunity resources included in the second bandwidth resource are the same as the random access channel opportunity resources included in the first bandwidth resource.

[0277] Specifically, the second indication information may be carried by one or more of a Random Access Response (RAR) message, downlink control information for scheduling the RAR message, a contention resolution message (Msg4), and downlink control information for scheduling the contention resolution message, and / or the second indication information is included in the uplink grant (UL grant) of each Medium Access Control Random Access Response (MAC RAR) in the RAR message. The second indication information may indicate the second channel bandwidth for each terminal device in the first type of terminal device, and the second indication information may be included in the UL grant of the MAC RAR.

[0278] The second indication information may indicate the second channel bandwidth resource for a group of terminal devices in the first type of terminal device, and the second indication information may be included in the RAR, DCI for scheduling the RAR, Msg4, and DCI for scheduling Msg4.

[0279] The second indication information may be carried separately in two types of information. For example, the second indication information is carried in both the DCI for scheduling Msg4 and the UL grant for scheduling the MAC RAR, and on the second bandwidth resource, the first terminal device is instructed to transmit the message 3 in the random access process or transmit a physical uplink control channel for feedback to the contention resolution message.

[0280] For example, the first terminal device transmits a random access preamble on the first bandwidth resource. The first terminal device transmits the message 3 in the random access process or a physical uplink control channel for feedback to the contention resolution message on the second bandwidth resource.

[0281] The bandwidth resource for the first terminal device to transmit a random access preamble may be different from the bandwidth resource for the first terminal device to transmit Message 3 in the random access process. The bandwidth resource for the first terminal device to transmit a random access preamble may be different from the bandwidth resource used by the first terminal device to transmit a physical uplink control channel for feedback to a contention resolution message. The bandwidth resource for the first terminal device to transmit a random access preamble may be different from the bandwidth resources for the first terminal device to transmit Message 3 in the random access process and to transmit a physical uplink control channel for feedback to a contention resolution message. The bandwidth resource used by the first terminal device to transmit Message 3 in the random access process may be different from the bandwidth resource for the first terminal device to transmit a physical uplink control channel for feedback on a contention resolution message. For example, the fifth indication information may be carried in one or more of RAR, DCI for scheduling RAR, Msg4, DCI for scheduling Msg4, and UL grant of MAC RAR, and indicates a third bandwidth resource. The first terminal device transmits Message 3 in the random access process on the second bandwidth resource, and the first terminal device transmits a physical uplink control channel for feedback to a contention resolution message on the third bandwidth resource. The third bandwidth resource may be the same as or different from the first bandwidth resource, and the third bandwidth resource may be the same as or different from the second bandwidth resource. In another example, when the first terminal device transmits a random access preamble on the first bandwidth resource and the second indication information is DCI for scheduling RAR and indicates a second bandwidth resource, the first terminal device transmits Message 3 in the random access process or transmits a physical uplink control channel for feedback to a contention resolution message on the second bandwidth resource.In another example, the first terminal device may further receive fifth indication information, where the fifth indication information is DCI for scheduling Msg4 and indicates a third bandwidth resource. In this case, the first terminal device transmits a physical uplink control channel for feedback to the contention resolution message on the third bandwidth resource.

[0282] The first terminal device may transmit all uplink information on the first bandwidth resource. This ensures that frequency adjustment is not required in the uplink transmission process and can reduce the number of frequency adjustment times. Alternatively, the first terminal device may transmit a random access preamble on the first bandwidth resource and transmit Message 3 in the random access process and a physical uplink control channel for feedback to the contention resolution message on the second bandwidth. This may consider load distribution based on reducing the number of frequency adjustment times. Alternatively, the first terminal device may transmit a random access preamble on the first bandwidth resource, transmit the first-hop transmission of Message 3 in the random access process on the second bandwidth resource, and transmit the second-hop transmission of Message 3 in the random access process and a physical uplink control channel for feedback to the contention resolution message on the third bandwidth resource. This helps the first terminal device obtain a frequency diversity gain of Message 3 in the random access process. Alternatively, the first terminal device may transmit a random access preamble on the first bandwidth resource, transmit Message 3 in the random access process and the first-hop transmission of the physical uplink control channel for feedback to the contention resolution message on the second bandwidth resource, and transmit the second-hop transmission of the physical uplink control channel for feedback to the contention resolution message on the third resource. This helps achieve a frequency diversity gain of the physical uplink control channel and solve the resource fragmentation problem caused by the resource allocation of the physical uplink control channel.

[0283] For example, the first terminal device transmits a random access preamble on a first bandwidth resource, and the first terminal device receives third indication information. The resource for the first terminal device to transmit information can be determined based on the bit status of the third indication information. The first terminal device only needs to detect the third indication information to determine whether a second bandwidth resource / a third bandwidth resource exists. If the second bandwidth resource / the third bandwidth resource does not exist, the first terminal device does not need to detect the configuration information. This reduces the complexity of the terminal device.

[0284] For example, when the bit status of the third indication information is in the first bit state, the first terminal device transmits message 3 in the random access process on the first bandwidth resource and / or transmits a physical uplink control channel for feedback to the contention resolution message on the first bandwidth resource; or when the bit status of the third indication information is in the second bit state, the first terminal device transmits message 3 in the random access process on the second bandwidth resource and / or transmits a physical uplink control channel for feedback to the contention resolution message on the second bandwidth resource.

[0285] In another example, when the bit status of the third indication information is in the second bit state, the first terminal device transmits message 3 in the random access process on the second bandwidth resource and transmits a physical uplink control channel for feedback to the contention resolution message on the third bandwidth resource.

[0286] For example, the third indication information may be identifier information, and the identifier information may be included in DCI or higher layer signaling. For example, the third indication information may be carried in RAR, DCI for scheduling RAR, Msg4, DCI for scheduling Msg4, and one or more of the UL grants of the MAC RAR. For example, the third indication information is DCI for scheduling RAR, and the third indication information is applied to the available bits in the DCI to indicate the resources for the first terminal device to transmit information.

[0287] For example, when the bit status is in the first bit state, the bandwidth resource for the first terminal device to transmit message 3 in the random access process and / or to transmit a physical uplink control channel for feedback to the contention resolution message is the same as the first bandwidth resource for the first terminal device to transmit the random access preamble.

[0288] In another example, when the bit status is in the second bit state, the bandwidth resource for the first terminal device to transmit message 3 in the random access process and / or to transmit a physical uplink control channel for feedback to the contention resolution message is different from the first bandwidth resource for the first terminal device to transmit the random access preamble. For example, when the bit status is in the second bit status, the bandwidth resource for the first terminal device to transmit message 3 in the random access process and / or to transmit a physical uplink control channel for feedback to the contention resolution message is different from the first bandwidth resource for the first terminal device to transmit the random access preamble.

[0289] In a possible implementation, the application of the random access channel configuration information is associated with the value of the first parameter. When the value of the first parameter is greater than 4, the random access channel configuration information is used for the first type of terminal device and the second type of terminal device. When the value of the first parameter is less than or equal to 4, the random access channel configuration information is used only for the first type of terminal device.

[0290] For example, when the value of the first parameter is greater than 4, the random access channel configuration information cannot be used only for the first type of terminal device. The maximum channel bandwidth supported by the first type of terminal device is smaller than the size of the random access channel opportunity resources corresponding to the value of the first parameter greater than 4. Therefore, when the value of the first parameter is greater than 4, the random access channel configuration information cannot be used only for the first type of terminal device. This facilitates the coexistence of the first type of terminal device and the second type of terminal device within the coverage of the same network device.

[0291] In a possible implementation, the configuration of the M bandwidth resources is used only for the first type of terminal device. For example, the M bandwidth resources are M uplink BWPs or M downlink BWPs. For example, the configuration of the M bandwidth resources is configured independently for the first type of terminal device. That the configuration of the M bandwidth resources is configured independently for the first type of terminal device can be understood as each of the M bandwidth resources being configured by using an independent field or an independent parameter. The independent field or the independent parameter is different from the field or the parameter corresponding to the second type of terminal device, or the content configured in the independent field or the independent parameter is different from the content configured in the field or the parameter corresponding to the second type of terminal device.

[0292] The downlink information includes one or more of the PDCCH for scheduling SIB1, the PDSCH for carrying SIB1, the PDCCH for scheduling SI, the PDSCH for carrying SI, the PDCCH for scheduling Msg2, the PDSCH for carrying Msg2, the PDCCH for scheduling Msg3, the PDCCH for scheduling Msg4, and the PDSCH for carrying Msg4.

[0293] For example, when the random access channel configuration information is used for the type 1 terminal device and the type 2 terminal device and the value of the first parameter is greater than 4, the type 1 terminal device transmits uplink information or receives downlink information on the first bandwidth resource. For example, the random access channel configuration information is configured by both the type 1 terminal device and the type 2 terminal device, that is, it is not configured independently for the type 1 terminal device. For example, the value of the first parameter is 8.

[0294] For example, when the random access channel configuration information is used for the type 1 terminal device and the type 2 terminal device and the value of the first parameter is greater than 4, the type 1 terminal device transmits uplink information or receives downlink information on the second bandwidth resource. For example, the random access channel configuration information is configured by both the type 1 terminal device and the type 2 terminal device, that is, it is not configured independently for the type 1 terminal device.

[0295] For example, when the random access channel configuration information is used by the type-1 terminal device and the type-2 terminal device, and the value of the first parameter is less than or equal to 4, the type-1 terminal device transmits uplink information or receives downlink information on the bandwidth resource including the random access channel opportunity whose number is the first parameter. For example, the random access channel configuration information is configured by both the type-1 terminal device and the type-2 terminal device, that is, it is not configured independently for the type-1 terminal device. For example, the value of the first parameter is 1, 2, or 4. For example, the bandwidth resource of the random access channel opportunity whose number is the first parameter may be a predetermined resource of the random access channel opportunity whose number is the first parameter, or may be a first bandwidth resource determined by using the first indication information.

[0296] For the determination of the first bandwidth resource and the second bandwidth resource, please refer to the method in the foregoing embodiments. Here, it will not be described in detail again.

[0297] For example, the random access channel configuration information is used only by the type-1 terminal device, the first information indicates the first bandwidth resource, and the type-1 terminal device transmits uplink information or receives downlink information on the first bandwidth resource. For example, the random access channel configuration information is configured independently for the type-1 terminal device. For example, when the first bandwidth resource is configured in the system information, the type-1 terminal device transmits uplink information or receives downlink information on the first bandwidth resource.

[0298] In a possible implementation, the type-1 terminal device obtains indication information, where the indication information indicates the related configuration between the SSB and the random access; the type-1 terminal device determines the related configuration between the SSB and the random access based on the indication information. The related configuration between the SSB and the random access may indicate the number of SSBs associated with one random access channel opportunity (RO).

[0299] For example, the related configuration may be the first related configuration, or the related configuration is the second related configuration. For example, the first bit state of the fourth indication information is the first related configuration, and the second bit state of the fourth indication information is the second related configuration. For example, the first related configuration is the related configuration between a new SSB and a random access channel opportunity, that is, the first related configuration is different from the related configuration between the SSB and the random access channel opportunity corresponding to the second type of terminal device.

[0300] For example, the type of the related configuration can be determined based on whether the indication information exists.

[0301] For example, when the indication information appears, the first terminal device determines that the related configuration between the SSB and the random access channel opportunity is the first related configuration; or when the indication information does not appear, the first terminal device determines that the related configuration between the SSB and the random access channel opportunity is the second related configuration. For example, the indication information is optionally configured. When the indication information is configured, that is, when the indication information appears, the related configuration between the SSB and the random access channel opportunity is the first related configuration; or when the indication information is not configured, that is, when the indication information does not appear, the related configuration between the SSB and the random access channel opportunity is the second related configuration. For example, the indication information is identifier information and includes 1 bit.

[0302] It should be understood that the foregoing correspondence relationship between the indication information or the bit status of the indication information and the related configuration is merely an example. This is not limited in this application.

[0303] In this solution, for an FDD system or a TDD uplink / downlink decoupling system, by determining the frequency domain position and bandwidth of the first resource, RF retuning during uplink transmission in the initial access phase can be avoided.

[0304] In the present application, bandwidth resources for uplink transmission or bandwidth resources for downlink reception are determined, and as a result, the total frequency range in which two adjacent uplink transmissions are performed, or the total frequency range in which two adjacent downlink receptions are performed, is within the maximum channel bandwidth range supported by the terminal device. Thereby, frequency adjustment between frequent uplink transmissions and / or frequency adjustment during frequent downlink receptions can be avoided, symbols available for data transmission can be improved, resource utilization can be improved, an increase in power consumption of the UE can be avoided, and the complexity of the UE implementation can be reduced.

[0305] Each embodiment described in this specification may be an independent solution means or may be combined based on internal logic. All of these solution means fall within the protection scope of the present application.

[0306] In the foregoing embodiments provided in the present application, the method provided in the embodiments of the present application is described from the perspective of interaction between devices. To implement the functions in the method provided in the foregoing embodiments of the present application, a network device or a terminal device includes a hardware structure and / or a software module, and may implement the foregoing functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. Which of the foregoing functions are performed using any of a hardware structure, a software module, or a combination of a hardware structure and a software module is determined by the specific use of the technical solution means and design constraints.

[0307] In the present embodiment of the present application, the division into modules is an example and is merely a logical function division. In actual implementation, another division method may be used. In addition, the functional modules in the embodiments of the present application may be integrated into one processor, or may physically exist alone, or two or more modules may be integrated into one module. The integrated module may be implemented in the form of hardware or in the form of a software functional module.

[0308] Similar to the foregoing concepts shown in FIG. 14, the embodiments of the present application further provide an apparatus 1300 configured to implement the functions of the network device or the terminal device in the foregoing method. For example, the apparatus may be a software module or a chip system. In the present embodiment of the present application, the chip system may include a chip or may include a chip and another discrete component. The apparatus 1300 may include a processing unit 1310 and a communication unit 1320.

[0309] In the present embodiment of the present application, the communication unit may also be referred to as a transceiver unit and may have a transmission unit and / or a reception unit configured to execute the transmission and reception steps of the network device or the terminal device respectively in the embodiments of the foregoing method.

[0310] Hereinafter, with reference to FIGS. 14 and 15, the communication apparatus provided in the embodiments of the present application will be described in detail. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, for the content not described in detail, reference may be made to the embodiments of the foregoing method. For the sake of brevity, the details will not be described again in this specification.

[0311] The communication unit may also be referred to as a transceiver, transceiver machine, or transceiver device, etc. The processing unit may sometimes also be called a processor, processing board, processing module, or processing device, etc. Optionally, components in the communication unit 1320 configured to implement a receiving function may be regarded as a receiving unit, and components in the communication unit 1320 configured to implement a transmitting function may be regarded as a transmitting unit. In other words, the communication unit 1320 includes a receiving unit and a transmitting unit. Also, the communication unit may in some cases be referred to as a transceiver machine, transceiver, interface circuit, or the like. The receiving unit may in some cases also be referred to as a receiver machine, receiver, receiving circuit, etc. The transmitting unit may in some cases also be referred to as a transmitter machine, transmitter, transmitting circuit, etc.

[0312] When the communication device 1300 executes the functions of the first terminal device in the procedures shown in any one of FIGS. 2 to 13 in the foregoing embodiments, the processing unit is configured to determine information transmission resources based on the downlink information of the network device or in a predefined manner; the communication unit is configured to receive and transmit information.

[0313] When the communication device 1300 executes the functions of the network device in the procedures shown in any one of FIGS. 2 to 13 in the foregoing embodiments, the processing unit is configured to configure resources or determine resources in a predefined manner; the communication unit is configured to receive and transmit information.

[0314] The foregoing are merely examples. The processing unit 1310 and the communication unit 1320 may further perform other functions. For more detailed descriptions, refer to the related descriptions in the embodiments of the methods shown in FIGS. 2 to 13 or the embodiments of other methods. Details will not be described again here.

[0315] FIG. 15 shows an apparatus 1400 according to an embodiment of the present application. The apparatus shown in FIG. 15 may be an implementation of the hardware circuit of the apparatus shown in FIG. 14. The communication apparatus is applicable to the foregoing flowchart and executes the functions of the terminal device or the network device in the foregoing method embodiments. For ease of explanation, FIG. 14 shows only the main components of the communication apparatus.

[0316] As shown in FIG. 15, the communication apparatus 1400 includes a processor 1410 and an interface circuit 1420. The processor 1410 and the interface circuit 1420 are coupled to each other. It can be understood that the interface circuit 1420 may be a transceiver or an input / output interface. Optionally, the communication apparatus 1400 may further include a memory 1430 configured to store instructions executed by the processor 1410, store input data necessary for the processor 1410 to execute the instructions, or store data generated after the processor 1410 executes the instructions.

[0317] When the communication apparatus 1400 is configured to implement the methods shown in FIGS. 2-13, the processor 1410 is configured to implement the functions of the processing unit 1310, and the interface circuit 1420 is configured to implement the functions of the communication unit 1320.

[0318] When the communication apparatus is a chip used in a terminal device, the chip in the terminal device implements the functions of the terminal device in the foregoing method embodiments. The chip in the terminal device receives information from another module (e.g., a radio frequency module or an antenna) within the terminal device, where the information is transmitted by the network device to the terminal device. Alternatively, the chip in the terminal device transmits information to another module (e.g., a radio frequency module or an antenna) within the terminal device, where the information is transmitted by the terminal device to the network device.

[0319] When the communication device is a chip used in a network device, the chip in the network device implements the functions of the network device in the foregoing method embodiments. The chip in the network device receives information from another module (e.g., a radio frequency module or an antenna) within the network device, where the information is transmitted by a terminal device to the network device. Alternatively, the chip in the network device transmits information to another module (e.g., a radio frequency module or an antenna) within the network device, where the information is transmitted by the network device to the terminal device.

[0320] The processor in the embodiments of the present application can be a Central Processing Unit (CPU), or another general-purpose processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or another programmable logic device, transistor logic device, hardware component, or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor or the like.

[0321] In an embodiment of the present application, the processor may be a storage medium in the form of random access memory (RAM), flash memory, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), register, hard disk, removable hard disk, CD-ROM, or any other form well known in the art. For example, by connecting the storage medium to the processor, the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may be a component of the processor. The processor and the storage medium may be arranged in an ASIC. In addition, the ASIC may be located in a network device or a terminal device. Naturally, the processor and the storage medium may alternatively exist as discrete components in a network device or a terminal device.

[0322] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application may use forms of embodiments with only hardware, only software, or a combination of software and hardware. Furthermore, the present application may use the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memory, optical memory, and the like) containing computer-usable program code.

[0323] This application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the application. It should be understood that computer program instructions can be used to implement each step and / or each block in the flowchart and / or block diagram, as well as combinations of steps and / or blocks in the flowchart and / or block diagram. These computer program instructions can be provided for a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or any other programmable data processing device to generate a machine, so that the instructions executed by the computer or any other programmable data processing device's processor implement a device for implementing specific functions in one or more steps in the flowchart and / or one or more blocks in the block diagram.

[0324] Since these computer program instructions can be stored in a computer-readable memory that can instruct a computer or any other programmable data processing device to operate in a specific manner, the instructions stored in the computer-readable memory result in an intermediate article including an instruction device. The instruction device implements specific functions in one or more steps of the flowchart and / or one or more blocks of the block diagram.

[0325] It is clear that those skilled in the art can make various modifications and variations to this application without departing from the scope of the application. As long as these modifications and variations of this application are included in the protection scope defined by the following claims and their equivalent technologies, this application is intended to include these modifications and variations.

[0326] The above description is only a specific implementation of this application and is not intended to limit the protection scope of this application. Any deformation or substitution that can be easily conceived by those skilled in the art within the technical scope disclosed in this application shall be included in the protection scope of this application. Therefore, the protection scope of this application shall follow the protection scope of the claims. (Other conceivable items) (Item 1) Receiving, by the first terminal device, first information, where the first information indicates M bandwidth resources, M is a positive integer, the first terminal device is a first type of terminal device, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device; Receiving, by the first terminal device, a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit; Determining, by the first terminal device, a first bandwidth resource from the M bandwidth resources based on the first information and the first parameter; and Transmitting, by the first terminal device, uplink information or receiving downlink information on the first bandwidth resource An information transmission method comprising the above steps. (Item 2) The value of the first parameter is greater than 4, When M = 1, the M bandwidth resources are the first bandwidth resource, the first bandwidth resource includes a predefined resource of N random access channel opportunities, and the random access channel opportunities whose number is the first parameter include the N random access channel opportunities, where N is a positive integer; or When M = 1, the M bandwidth resources are the first bandwidth resource, the start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity, and the first random access channel opportunity is indicated by first indication information; or When M>1, each of the M bandwidth resources includes a resource corresponding to at least one random access channel opportunity. The method according to item 1. (Item 3) The value of the first parameter is 8, and the index of the random access channel opportunity sorted in the first order is 0 to 7, and the first order includes the ascending order of frequency, and the method according to item 1 or 2. (Item 4) The first terminal device further receives the first indication information, where when the first indication information includes 1 bit, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 4}; or when the first indication information includes 2 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 1, 2, 3, 4, 5, 6, 7}; or When the first terminal device does not receive the first indication information, the index of the first random access channel opportunity is 0. The method according to item 3. (Item 5) The first information indicates the M bandwidth resources; The size of each of the M bandwidth resources is predefined; or When M = 2, one of the bandwidth resources in the bandwidth resource includes the resources of the random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resource includes the resources of the random access channel opportunities {4, 5, 6, 7}; or When M>1, the remaining (M - 1) bandwidth resources are determined based on the first candidate bandwidth resource, and the first candidate bandwidth resource is indicated by using the first signaling. The method according to any one of items 1 to 4. (Item 6) When M>1, the method further Receiving, by the first terminal device, second indication information, where the second indication information indicates a second bandwidth resource; Transmitting, by the first terminal device, a random access preamble on the first bandwidth resource; and Transmitting, by the first terminal device, a physical uplink control channel for feedback to message 3 in the random access process or a contention resolution message on the second bandwidth resource The method according to item 1, comprising: (Item 7) The second indication information is carried in one or more of a random access response message, downlink control information for scheduling the random access response message, a contention resolution message, and downlink control information for scheduling the contention resolution message; and / or The second indication information is carried in an uplink grant of each medium access control random access response in the random access response message, The method according to item 6. (Item 8) The method further comprises: Transmitting, by the first terminal device, the random access preamble on the first bandwidth resource; and Receiving, by the first terminal device, third indication information, where the third indication information indicates a bandwidth resource for the first terminal device to transmit the physical uplink control channel for feedback to the message 3 and / or the contention resolution message in the random access process, The method according to item 6 or 7, comprising: (Item 9) The method is: When the bit status of the third indication information is in the first bit state, the first terminal device transmits, on the first bandwidth resource, the physical uplink control channel for feedback on the message 3 and / or the contention resolution message in the random access process; or, When the bit status of the third indication information is in the second bit state, the first terminal device transmits, on the second bandwidth resource, the physical uplink control channel for feedback on the message 3 and / or the contention resolution message in the random access process The method according to item 8, comprising the above. (Item 10) The method further includes The step of the first terminal device acquiring fourth indication information, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration or the second related configuration, and the related configuration is the related configuration between the number of SSBs and the number of random access channel opportunities The method according to item 1, comprising the above. (Item 11) The method further includes When the first terminal device receives the fourth indication information, the fourth indication information indicates that the related configuration between the SSB and the random access is the first related configuration; or when the first terminal device does not receive the fourth indication information, the related configuration between the SSB and the random access is the second related configuration; or When the first terminal device receives the fourth indication information, the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the second related configuration; or when the first terminal device does not receive the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the first related configuration The method according to item 1, including the above. (Item 12) The method according to any one of items 1 to 11, where the first parameter is carried in the random access channel configuration information. (Item 13) The method according to any one of Items 1 to 12, wherein the first information includes system information. (Item 14) Transmitting, by the network device, the first information to the first terminal device, where the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device, and the first terminal device is a first type of terminal device; Transmitting, by the network device, a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit; and Receiving, by the network device, uplink information transmitted by the first terminal device on the first bandwidth resource, or transmitting downlink information to the first terminal device, where the first bandwidth resource is determined by the first terminal device from the M bandwidth resources based on the first information and the first parameter. An information transmission method comprising the above. (Item 15) The value of the first parameter is greater than 4. When M = 1, the M bandwidth resources are the first bandwidth resource, the first bandwidth resource includes a predefined resource of N random access channel opportunities, and the random access channel opportunities, the number of which is the first parameter, include N random access channel opportunities, where N is a positive integer; or When M = 1, the network device transmits first indication information, where the first indication information indicates a first random access channel opportunity, the start resource block of the first bandwidth resource is the same as the start resource block of the first random access channel opportunity, and the M bandwidth resources are the first bandwidth resource; or When M>1, each of the M bandwidth resources includes resources corresponding to at least one random access channel opportunity. The method according to item 14. (Item 16) The value of the first parameter is 8, the indexes of the random access channel opportunities sorted in the first order are 0 to 7, and the first order includes an ascending order of frequencies. The method according to item 14 or 15. (Item 17) When the first indication information includes 1 bit, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 4}; or When the first indication information includes 2 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {1, 2, 3, 4}; or When the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 1, 2, 3, 4}; or When the first indication information includes 3 bits, the first indication information indicates the index of the first random access channel opportunity at indexes {0, 1, 2, 3, 4, 5, 6, 7}; or When the network device does not transmit the first indication information, the index of the first random access channel opportunity is 0. The method according to item 16. (Item 18) The first information indicates the M bandwidth resources; The size of each of the M bandwidth resources is predefined; or When M = 2, one of the bandwidth resources in the bandwidth resources includes resources of random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resources includes resources of random access channel opportunities {4, 5, 6, 7}; or When M>1, the network device transmits first signaling, where the first signaling is used to indicate a first candidate bandwidth resource, and the remaining (M-1) bandwidth resources are determined based on the first candidate bandwidth resource. The method according to any one of items 14 to 17. (Item 19) When M>1, the method further includes a step of transmitting second indication information by the network device, where the second indication information indicates a second bandwidth resource; a step of receiving a random access preamble on the first bandwidth resource by the network device; and a step of receiving, by the network device, a physical uplink control channel for feedback on message 3 in the random access process or a contention resolution message on the second bandwidth resource The method according to item 14, comprising. (Item 20) The second indication information is carried in one or more of a random access response message, downlink control information for scheduling the random access response message, a contention resolution message, and downlink control information for scheduling the contention resolution message; and / or The second indication information is carried in an uplink grant of each medium access control random access response in the random access response message. The method according to item 19. (Item 21) When M>1, the method further includes a step of receiving the random access preamble on the first bandwidth resource by the network device; and The step of transmitting third indication information by the network device, where the third indication information indicates a bandwidth resource for transmitting the physical uplink control channel for the first terminal device to feedback on the message 3 and / or the contention resolution message in the random access process. The method according to item 19 or 20, comprising. (Item 22) The method includes When the bit status of the third indication information is in the first bit state, the step of receiving, by the network device, on the first bandwidth resource, the physical uplink control channel for the first terminal device to feedback on the message 3 and / or the contention resolution message in the random access process; or When the bit status of the third indication information is in the second bit state, the step of receiving, by the network device, on the second bandwidth resource, the physical uplink control channel for the first terminal device to feedback on the message 3 and / or the contention resolution message in the random access process The method according to item 21, comprising. (Item 23) The method further includes The step of transmitting fourth indication information by the network device, where the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration or the second related configuration, and the related configuration is the related configuration between the number of SSBs and the number of random access channel opportunities. The method according to item 1, comprising. (Item 24) The method further includes When the network device transmits the fourth indication information, the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the first related configuration; or when the network device does not transmit the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the second related configuration; or When the network device transmits the fourth indication information, the fourth indication information indicates that the related configuration between the SSB and the random access channel opportunity is the second related configuration; or when the network device does not transmit the fourth indication information, the related configuration between the SSB and the random access channel opportunity is the first related configuration. The method according to item 1, including (Item 25) The method according to any one of items 14 to 24, wherein the first parameter is carried in the random access channel configuration information. (Item 26) The method according to any one of items 14 to 25, wherein the first information includes system information. (Item 27) A communication device comprising a processor, the processor being connected to a memory, the memory being configured to store a computer program, the processor being configured to execute the computer program stored in the memory, as a result, the device executes the method according to any one of items 1 to 13, or executes the method according to any one of items 14 to 26. (Item 28) A computer-readable storage medium configured to store a computer program, when the computer program is executed on a computer, the computer can execute the method according to any one of items 1 to 13, or the computer can execute the method according to any one of items 14 to 26. (Item 29) A chip comprising a processor and a communication interface, the processor being configured to read instructions for executing the method according to any one of items 1 to 13, or executing the method according to any one of items 14 to 26. (Item 30) A communication device comprising a module configured to execute the method according to any one of items 1 to 13 or items 14 to 26. (Item 31) A computer program product including computer program code, wherein when the computer program code is executed, the method according to any one of Items 1 to 13 or 14 to 26 is implemented.

Claims

1. Receiving first information, where the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by a first terminal device, and the first terminal device is a first type of terminal device; Receiving a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit; Determining a first bandwidth resource from the M bandwidth resources based on the first information and the first parameter; Transmitting a random access preamble on the first bandwidth resource; and Receiving third indication information, where the third indication information is identifier information, the identifier information is carried in higher layer signaling, and the third indication information is for determining a bandwidth resource for transmitting a physical uplink control channel (PUCCH) for feedback of a contention resolution message; An information transmission method comprising the above.

2. The contention resolution message is a HARQ-ACK feedback of Msg4 The information transmission method according to Claim 1.

3. The bit status of the third indication information indicates the bandwidth resource for transmitting the PUCCH The information transmission method according to Claim 1 or 2.

4. The first bandwidth resource and the bandwidth resource for transmitting the PUCCH for the first terminal device to feedback the contention resolution message are within an initial uplink bandwidth part (initial UL BWP), and the initial UL BWP is indicated by a system information block 1 (SIB1) The information transmission method according to any one of Claims 1 to 3.

5. The first type of terminal device is a reduced capability (RED-CAP) terminal device The information transmission method according to any one of Claims 1 to 4.

6. The identifier information includes 1 bit The information transmission method according to any one of Claims 1 to 5.

7. The higher layer signaling is a system information block 1 (SIB1) The information transmission method according to any one of Claims 1 to 6.

8. The bit status of the third indication information is in a first bit state or a second bit state, and the bandwidth resource determined for the first terminal device to transmit the PUCCH in the first bit state is different from the bandwidth resource determined for the first terminal device to transmit the PUCCH in the second bit state. The information transmission method according to any one of claims 1 to 7.

9. Transmitting first information to a first terminal device, where the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device, and the first terminal device is a first type of terminal device; Transmitting a first parameter, where the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit; Receiving a random access preamble on a first bandwidth resource from the first terminal device, where the first bandwidth resource is determined by the first terminal device from the M bandwidth resources based on the first information and the first parameter; and Transmitting third indication information, where the third indication information is identifier information, the identifier information is carried by higher layer signaling, and the third indication information is for determining the bandwidth resource for the first terminal device to transmit a physical uplink control channel (PUCCH) for feedback of a contention resolution message; An information transmission method comprising the above steps.

10. The contention resolution message is a HARQ-ACK feedback of Msg4. The information transmission method according to claim 9.

11. The bit status of the third indication information indicates the bandwidth resource for transmitting the PUCCH. The information transmission method according to claim 9 or 10.

12. The first bandwidth resource and the bandwidth resource for the first terminal device to transmit the PUCCH for feedback of the contention resolution message are within the initial uplink bandwidth part (initial UL BWP), and the initial UL BWP is indicated by a system information block 1 (SIB1). The information transmission method according to any one of claims 9 to 11.

13. The first type of terminal device is a reduced-capability (RED-CAP) terminal device The information transmission method according to any one of claims 9 to 12

14. The identifier information includes 1 bit The information transmission method according to any one of claims 9 to 13

15. The higher-layer signaling is System Information Block 1 (SIB1) The information transmission method according to any one of claims 9 to 14

16. The bit status of the third indication information is the first bit state or the second bit state, and the bandwidth resource determined for the first terminal device to transmit the PUCCH in the first bit state is different from the bandwidth resource determined for the first terminal device to transmit the PUCCH in the second bit state The information transmission method according to any one of claims 9 to 15

17. A communication device comprising a processing unit and a transceiver unit, The transceiver unit is configured to receive first information, the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by a first terminal device, the first terminal device being a first type of terminal device, The transceiver unit is further configured to receive a first parameter, the first parameter being the number of random access channel opportunities for frequency division multiplexing in a time unit, The processing unit is configured to determine a first bandwidth resource from the M bandwidth resources based on the first information and the first parameter, The transceiver unit is further configured to transmit a random access preamble on the first bandwidth resource, The transceiver unit is further configured to receive third indication information, the third indication information being identifier information, the identifier information being carried by higher-layer signaling, and the third indication information being for determining a bandwidth resource for the first terminal device to transmit a physical uplink control channel (PUCCH) for feedback of a contention resolution message Communication device

18. The contention resolution message is a HARQ-ACK feedback of Msg4 The communication device according to claim 17

19. The bit status of the third indication information indicates the bandwidth resource for transmitting the PUCCH. The communication device according to claim 17 or 18.

20. The first bandwidth resource and the bandwidth resource for transmitting the PUCCH for the first terminal device to feedback the contention resolution message are within the initial uplink bandwidth part (initial UL BWP), and the initial UL BWP is indicated by the system information block 1 (SIB1). The communication device according to any one of claims 17 to 19.

21. The first type of terminal device is a reduced functionality (RED-CAP) terminal device. The communication device according to any one of claims 17 to 20.

22. The identifier information includes 1 bit. The communication device according to any one of claims 17 to 21.

23. The higher layer signaling is the system information block 1 (SIB1). The communication device according to any one of claims 17 to 22.

24. The bit status of the third indication information is a first bit state or a second bit state, and the bandwidth resource determined for the first terminal device to transmit the PUCCH in the first bit state is different from the bandwidth resource determined for the first terminal device to transmit the PUCCH in the second bit state. The communication device according to any one of claims 17 to 23.

25. A communication device comprising a transceiver unit, The transceiver unit is configured to transmit first information to a first terminal device, the first information indicates M bandwidth resources, M is a positive integer, and the size of each of the M bandwidth resources is equal to or smaller than the maximum channel bandwidth supported by the first terminal device, and the first terminal device is a first type of terminal device, The transceiver unit is further configured to transmit a first parameter, and the first parameter is the number of random access channel opportunities for frequency division multiplexing in a time unit. The transceiver unit is further configured to receive a random access preamble on the first bandwidth resource from the first terminal device, and the first bandwidth resource is determined by the first terminal device from the M bandwidth resources based on the first information and the first parameter. The transceiver unit is further configured to transmit third indication information, the third indication information is identifier information, the identifier information is carried by higher layer signaling, and the third indication information is for determining a bandwidth resource for the first terminal device to transmit a physical uplink control channel (PUCCH) for feedback of a contention resolution message. Communication device.

26. The contention resolution message is a HARQ-ACK feedback of Msg4. The communication device according to claim 25.

27. The bit status of the third indication information indicates the bandwidth resource for transmitting the PUCCH. The communication device according to claim 25 or 26.

28. The first bandwidth resource and the bandwidth resource for the first terminal device to transmit the PUCCH for feedback of the contention resolution message are within the initial uplink bandwidth part (initial UL BWP), and the initial UL BWP is indicated by the system information block 1 (SIB1). The communication device according to any one of claims 25 to 27.

29. The first type of terminal device is a reduced functionality (RED-CAP) terminal device. The communication device according to any one of claims 25 to 28.

30. The identifier information includes 1 bit. The communication device according to any one of claims 25 to 29.

31. The higher layer signaling is the system information block 1 (SIB1). The communication device according to any one of claims 25 to 30.

32. The bit status of the third indication information is a first bit state or a second bit state, and the bandwidth resource determined for the first terminal device to transmit the PUCCH in the first bit state is different from the bandwidth resource determined for the first terminal device to transmit the PUCCH in the second bit state. The communication device according to any one of claims 25 to 31.

33. A communication device comprising a processor, wherein the processor is connected to a memory, the memory is configured to store a computer program, and the processor is configured to execute the computer program stored in the memory, whereby the communication device executes the information transmission method according to any one of claims 1 to 8, or executes the information transmission method according to any one of claims 9 to 16 Communication device.

34. A computer program, wherein when the computer program operates on a computer, the computer is capable of executing the information transmission method according to any one of claims 1 to 8, or the computer is capable of executing the information transmission method according to any one of claims 9 to 16 Computer program.

35. A chip comprising a processor and a communication interface, wherein the processor is configured to read instructions for executing the information transmission method according to any one of claims 1 to 8, or executing the information transmission method according to any one of claims 9 to 16 Chip.

36. A communication device comprising a module configured to execute the information transmission method according to any one of claims 1 to 8 or claims 9 to 16

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