Information transmission method and device

Abstract

The present application provides an information transmission method and device. The information transmission method includes 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 location of the first resource, the first bandwidth is the size of the first resource, the size of the first resource 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 terminal device. The first terminal device transmits and / or receives information on the first resource, thereby solving the problem of frequency switching of the working frequency of the communication device in the network access process, effectively reducing the power consumption of the communication device, and improving the flexibility of information transmission.

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202110286882.2, entitled “Information Transmission Method and Apparatus,” filed with the China State Intellectual Property Office on March 17, 2021, which is incorporated herein by reference in its entirety.

[0002] The present application relates to the field of communications, and in particular to a method and apparatus for transmitting information. [Background technology]

[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 between adjacent uplink transmissions for the service of the communication device, or frequency adjustment is performed between adjacent downlink receptions for the service of the communication device. The frequency switching of the operating frequency causes large power consumption of the communication device. Summary of the Invention

[0004] The present application provides an information transmission method and apparatus to avoid frequency switching of the working 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 of a first terminal device acquiring first information, where the first information indicates M bandwidth resources, M being a positive integer, the first terminal device being a first type terminal device, and a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by the first terminal device. The first terminal device acquires a first parameter, where the first parameter is a 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, e.g., SIB1, and the first parameter may be held in random access channel configuration information. The first terminal device is a first type terminal device, which may be a reduced capability UE (REDCAP UE). Characteristics such as bandwidth, number of supported or configured resources, number of transmit antenna ports and / or number of receive antenna ports, number of radio frequency channels, number of hybrid automatic repeat request (HARQ) processes, supported peak rate, delay requirement, and processing capability of the first type terminal device are lower than those of the second type terminal device (which may be a legacy UE).

[0007] It should be understood that the sizes of the M bandwidth resources can be the same or different, which is not a limitation in this application.

[0008] In the method, at least one bandwidth resource whose size is within a maximum bandwidth channel range supported by a first terminal device is configured, and the first terminal device determines a first bandwidth resource based on the first information and the first parameter, thereby avoiding frequency switching of an operating frequency of the first terminal device and reducing power consumption.

[0009] Referring to the first aspect, in some implementations of the first aspect, the value of the first parameter is greater than 4, and when M=1, the bandwidth resource is a first bandwidth resource, and the first bandwidth resource includes predefined resources of N random access channel opportunities, and the random access channel opportunity whose number is the first parameter includes N random access channel opportunities, where N is a positive integer; or when M=1, the bandwidth resource is a first bandwidth resource, and a starting resource block of the first bandwidth resource is the same as a starting 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 a resource 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 indices of the random access channel opportunities to be sorted in the first order are 0 to 7, and the first order includes ascending order of frequency.

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

[0012] The first terminal device acquires first indication information, where when the first indication information includes 1 bit, the first indication information indicates an index of the first random access channel opportunity at index {0,4}; or when the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0,1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {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] It should be understood that when including 3 bits, the first indication information may indicate indexes of {0, 1, 2, 3, 4}, and the bandwidth resources corresponding to 5 random access channel opportunities may cover the maximum channel bandwidth supported by the first terminal device. Alternatively, the first indication information may indicate indexes of 8 random access channel opportunities.

[0014] It should be understood that the first terminal device not obtaining the first indication information may be 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 bandwidth resource in the bandwidth resources includes resources for random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resources includes resources for random access channel opportunities {4, 5, 6, 7}; or when M>1, the remaining (M-1) bandwidth resources are determined based on a first candidate bandwidth resource, and the first candidate bandwidth resource is indicated by using a first signaling.

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

[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 a 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 may 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 an uplink grant of each medium access control random access response 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 a first bandwidth resource, and 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 message 3 in the random access process and / or a physical uplink control channel for feedback to a contention resolution message.

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

[0022] That is, the bit status of the third indication information may be used to indicate bandwidth resources for transmitting message 3 in the random access process and / or a physical uplink control channel for feedback to 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 acquires fourth indication information, where the fourth indication information indicates that the association configuration between SSB and random access is the first association configuration or the second association configuration; or, if the first terminal device acquires the fourth indication information, the fourth indication information indicates that the association configuration between SSB and random access is the second association configuration; or, if the first terminal device does not receive the fourth indication information, the association configuration between SSB and random access is the first association configuration.

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

[0026] According to a second aspect, a bandwidth resource determination method is provided. The method may comprise a step of a network device transmitting first information to a first terminal device, where the first information indicates M bandwidth resources, M being a positive integer, a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by the first terminal device, and the first terminal device being a first type terminal device. The network device transmits a first parameter, where the first parameter is a 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 or transmits downlink information to the first terminal device on the first bandwidth resource, 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 a maximum bandwidth channel range supported by the first terminal device is configured, and the first information and the first parameter are transmitted, so that the first terminal device determines the first bandwidth resource, thereby avoiding frequency switching of the operating frequency of the first terminal device and reducing power consumption.

[0028] Referring to the second aspect, in some implementations of the second aspect, the value of the first parameter is greater than 4, and when M=1, the M bandwidth resources are first bandwidth resources, and the first bandwidth resources include predefined resources of N random access channel opportunities, and the random access channel opportunities whose number is the first parameter include N random access channel opportunities, where N is a positive integer; or when M=1, the network device sends first indication information, where the first indication information indicates the first random access channel opportunity, and a starting resource block of the first bandwidth resource is identical to a starting resource block of the first random access channel opportunity, and the M bandwidth resources are the first bandwidth resources; or when M>1, each of the M bandwidth resources includes a resource 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 indices of the random access channel opportunities to be sorted in the first order are 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 an index of the first random access channel opportunity at index {0,4}; or when the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0,1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {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 bandwidth resource in the bandwidth resources includes resources for random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resources includes resources for random access channel opportunities {4, 5, 6, 7}; or when M>1, the network device transmits a 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.

[0032] Referring to the second aspect, in some implementations of the second aspect, the network device sends second indication information, where the second indication information indicates a 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 to a 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 the random access response message, the downlink control information for scheduling the random access response message, the contention resolution message, and the 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.

[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 a first bandwidth resource, and the network device sends third indication information, where the third indication information indicates a bandwidth resource for the first terminal device to send a physical uplink control channel for feedback to a message 3 in the random access process and / or a contention resolution message.

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

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

[0037] It should be understood that extensions, definitions, explanations and descriptions of relevant content in the first aspect are also applicable to the same content in the second aspect.

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

[0039] The method provides a determined reference point and a determined bandwidth, thereby preventing the first terminal device from determining the first resource through multiple detections, reducing the computing complexity of the first terminal device and reducing 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 a subband size reported by the CSI, a subcarrier spacing, and a maximum channel bandwidth supported by the first terminal device.

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

[0042] It should be understood that the maximum channel bandwidth supported by the first terminal device may be a transmission bandwidth, and the transmission bandwidth may be the number of resource blocks corresponding to the maximum channel bandwidth at different subcarrier spacings.

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

[0044] It should be understood that the associative relationship may be indicated by the designation 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 a 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 a common multiple of multiple items in the subband sizes reported by the CSI, the subcarrier 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 instruction information, where the instruction information indicates a first reference point, which may 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, 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 further be appreciated 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 location of the first resource may be determined based on a first reference point and a 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 location of the first resource may be MOD(first reference point+first offset, BW) or MOD(BW, reference point of first resource first offset), where BW is the bandwidth of the second resource or carrier bandwidth.

[0052] It should be understood that an association relationship exists between the first offset and the subcarrier spacing, which may be indicated by the indication information or may be predefined.

[0053] 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, there is provided a method of information transmission. The method may include: a network device may transmit a first reference point and a first bandwidth to a first terminal device, where the first reference point is used to determine a location of a first resource, and the first bandwidth is a 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 terminal device, and the size of the first resource is equal to or smaller than a maximum channel bandwidth supported by the first terminal device.

[0055] The method provides a determined reference point and a determined bandwidth, thereby preventing the first terminal device from determining the first resource through multiple detections, reducing the computing complexity of the first terminal device and reducing power consumption.

[0056] It should be understood that the network device transmits the first reference point and the first bandwidth are 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 one or more of a subband size reported by the CSI, a subcarrier spacing, and a maximum channel bandwidth 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 the first offset, where the first offset may also be determined based on one or more of the subband size, the subcarrier spacing, and the maximum channel bandwidth supported by the first terminal device reported by the CSI.

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

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

[0061] It should be understood that the association relationship may be indicated by indication information sent 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 a common multiple of multiple items in the subband sizes reported by the CSI, the subcarrier spacing, 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 send instruction information, where the instruction information indicates a first reference point, which may 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, common resource block 0, or 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] It should be understood that the indication information may be carried in SIB1 or SIB1 PDCCH.

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

[0067] Referring to the fourth aspect, in some implementations of the fourth aspect, the network device may transmit a first reference point and a first offset, and the location 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 common resource block 0. The location of the first resource may be MOD(first reference point+first offset, BW) or MOD(BW, reference point of first resource first offset), where BW is the bandwidth of the second resource or the carrier bandwidth.

[0069] It should be understood that an association relationship exists between the first offset and the subcarrier spacing, which may be indicated by the indication information sent by the network device, or may be predefined.

[0070] According to a fifth aspect, a communication device is provided, which may comprise: a transceiver unit configured to receive first information, where the first information indicates M bandwidth resources, M being a positive integer, and a size of each of the M bandwidth resources is equal to or smaller than a maximum channel bandwidth supported by a first type terminal device; the transceiver unit further configured to receive a first parameter, where the first parameter is a 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, the value of the first parameter is greater than 4, and when M=1, the M bandwidth resources are first bandwidth resources, and the first bandwidth resources include predefined resources of N random access channel opportunities, and the random access channel opportunities whose number is the first parameter include N random access channel opportunities, where N is a positive integer; or when M=1, the M bandwidth resources are first bandwidth resources, and the transceiver unit is specifically configured to receive first indication information, where the first indication information indicates the first random access channel opportunity, and a starting resource block of the first bandwidth resource is identical to a starting resource block of the first random access channel opportunity; or when M>1, each of the M bandwidth resources includes a resource 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, the indices of the random access channel opportunities to be sorted in the first order are 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 an index of the first random access channel opportunity at index {0,4}; or when the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0,1,2,3,4}, or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {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 pre-defined; or, when M=2, one bandwidth resource in the bandwidth resources includes resources for random access channel opportunities {0, 1, 2, 3}, and the other bandwidth resource in the bandwidth resources includes resources for 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 a 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 instruction information, where the second instruction 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 the random access response message, the downlink control information for scheduling the random access response message, the contention resolution message, and the 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.

[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 a first bandwidth resource and receive third instruction information, where the third instruction information indicates a bandwidth resource for the transceiver unit to transmit message 3 in the random access process and / or transmit a physical uplink control channel for feeding back a 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 feeding back 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 feeding back 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 instruction information, where the fourth instruction information indicates that an association configuration between the SSBs and the random access channel opportunities is a first association configuration or a second association configuration, and the association configuration is an association 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 fourth indication information, where the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunities is the first association configuration; or, when the transceiver unit does not receive the fourth indication information, where the association configuration between the SSB and the random access channel opportunities is the second association configuration; or, when the transceiver unit receives fourth indication information, where the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunities is the second association configuration; or, when the transceiver unit does not receive the fourth indication information, where the association configuration between the SSB and the random access channel opportunities is the first association configuration.

[0081] Referring to the fifth aspect, in some implementations of the fifth aspect, the first parameter is carried in 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 a sixth aspect, a communication apparatus is provided, the apparatus may comprise: a transceiver unit configured to transmit a first parameter to a first terminal device, where the first parameter is a 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 a size of each of the M bandwidth resources is equal to or smaller than a maximum channel bandwidth supported by the first terminal device, where the transceiver unit is further configured to receive uplink information transmitted by the first terminal device or transmit downlink information on the first bandwidth resource 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.

[0084] Referring to the sixth aspect, in some implementations of the sixth aspect, the value of the first parameter is greater than 4, and when M=1, the M bandwidth resources are first bandwidth resources, and the first bandwidth resources include predefined resources of N random access channel opportunities, and the random access channel opportunities whose number is the first parameter include 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 a starting resource block of the first bandwidth resource is identical to a starting resource block of the first random access channel opportunity, and the M bandwidth resources are the first bandwidth resources; 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 indices of the random access channel opportunities sorted in the first order are 0 to 7, and the first order includes ascending order of frequency.

[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 an index of the first random access channel opportunity at index {0,4}; or when the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0,1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {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 a size of each of the M bandwidth resources is pre-defined; or, when M=2, one bandwidth resource 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 transceiver unit is further configured to transmit 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.

[0088] Referring to the sixth aspect, in some implementations of the sixth aspect, when M>1, the transceiver unit is further configured to: send second instruction information, where the second instruction information indicates a second bandwidth resource; and receive a random access preamble on the first bandwidth resource; and receive a physical uplink control channel for feeding back 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 the random access response message, the downlink control information for scheduling the random access response message, the contention resolution message, and the 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.

[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 a first bandwidth resource and send third instruction information, where the third instruction information indicates a bandwidth resource for the first terminal device to send a physical uplink control channel for feeding back 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 feeding back 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 feeding back 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, where the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is the first association configuration or the second association configuration.

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

[0094] Referring to the sixth aspect, in some implementations of the sixth aspect, the first parameter is carried in 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 there is provided a communications device, the communications device being configured to implement the method of the first or third aspect or any one of the possible implementations of the first or third aspect or all possible implementations of the first or third aspect.

[0097] According to an eighth aspect there is provided a communications device, the communications device being configured to implement the method of the second or fourth aspect or any one of the possible implementations of the second or fourth aspect or all possible implementations of the second or fourth aspect.

[0098] According to a ninth aspect, there is provided a communications apparatus, the apparatus including: 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 performed by the first terminal device in any one of the first or third aspects and implementations of the first or third aspects.

[0099] According to a tenth aspect, there is provided a communications apparatus, the apparatus including: 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 perform a method performed by a network device in either the second or fourth aspect, or any one of the implementations of the second or fourth aspect.

[0100] According to an eleventh aspect, there is provided a computer readable medium storing program code for execution by a device, the program code including a method for execution by a first terminal device in any implementation of the first or third aspects.

[0101] According to a twelfth aspect, there is provided a computer readable medium storing program code for execution by a device, the program code including a method for execution by a network device in any implementation of the second or fourth aspect.

[0102] According to a thirteenth aspect, there is provided a computer program product comprising instructions, which when executed on a computer, enable the computer to carry out a method in any implementation of the first or second aspect.

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

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

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

[0106] The aforementioned chip may specifically be a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC). [Brief description of the drawings]

[0107] [Figure 1] 1 is a schematic diagram of the architecture of a communication system to which embodiments of the present application are applicable;

[0108] [Diagram 2] 1 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

[0109] [Diagram 3] 1 is a schematic diagram of an information transmission method to which embodiments of the present application are applicable;

[0110] [Figure 4] FIG. 2 is a schematic diagram of another information transmission method to which the embodiments of the present application are applicable;

[0111] [Diagram 5] FIG. 2 is a schematic diagram of resource allocation to which embodiments of the present application are applicable;

[0112] [Figure 6] FIG. 2 is a schematic diagram of resources to which the embodiments of the present application are applicable;

[0113] [Figure 7] FIG. 2 is a schematic diagram of resources to which the embodiments of the present application are applicable;

[0114] [Figure 8] FIG. 2 is a schematic diagram of resource allocation to which embodiments of the present application are applicable;

[0115] [Figure 9] FIG. 2 is a schematic diagram of a resource location determining method to which embodiments of the present application are applicable;

[0116] [Figure 10] FIG. 2 is a schematic diagram of a resource location to which embodiments of the present application are applicable;

[0117] [Figure 11]1 is a schematic flowchart of an information transmission method according to an embodiment of the present application;

[0118] [Figure 12] FIG. 2 is a schematic diagram of resources to which the embodiments of the present application are applicable;

[0119] [Figure 13] 1 is a schematic diagram of a resource location method to which embodiments of the present application are applicable;

[0120] [Figure 14] 1 is a schematic block diagram of a communication device according to an embodiment of the present application;

[0121] [Figure 15] FIG. 2 is a schematic block diagram of another communication device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0122] The technical solutions of the present application are described below with reference to the accompanying drawings.

[0123] The 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), Enhanced Data Rate for GSM Evolution (EDGE) systems, Wideband Code Division Multiple Access (WCDMA) 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] Mobile communication technology has greatly changed people's lives, but people's pursuit for better mobile communication technology has not stopped. To cope with the explosive growth of mobile data traffic, the huge number of mobile communication device connections, and various new services and application scenarios in the future, the 5G mobile communication system has emerged. The international telecommunication union (ITU) defines 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 resolution video, augmented reality (AR), virtual reality (VR), and the like. These services have large data transmission volume and very high transmission rate. Typical URLLC services include wireless control in industrial manufacturing or production processes, motion control and remote repair of autonomous vehicles and unmanned aerial vehicles, haptic interaction applications such as remote surgery, and the like. These services have ultra-high reliability, low latency, 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, small amount of data transmission, and data insensitivity to transmission delays. These mMTC terminals need to meet the requirements of low cost and 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 different services is a technical problem to be solved in the current 5G mobile communication system, such as how to support both mMTC service and eMBB service, or how to support both URLLC service and eMBB service.

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

[0128] Currently, in this standard, the user equipment (UE) of mMTC service 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 number of antennas. For example, this type of UE has narrower bandwidth, lower power consumption, and a smaller number of antennas. This type of UE may also be referred to as 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 may not only be 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, i.e., a network device 120, and at least one terminal device (e.g., 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, different physical devices, or the functions of the core network device and the logical functions of the radio access network device are integrated into the same physical device, or part of the functions of the core network device and part of the functions of the radio access network device are integrated into one physical device. The terminal device may be located at a fixed location or may be mobile. FIG. 1 is merely a schematic diagram. The communication system may further include other network devices, for example, a wireless relay device and a wireless backhaul device, which are not shown in FIG. 1. The numbers of core network devices, radio access network devices, and terminal devices included in a mobile communication system are not limited to this embodiment of the present application.

[0130] It should be understood that the information transmitting end in the communication system in this application can be a network device or a terminal device, and the information receiving end can be a network device or a terminal device, which is not limited in this application as long as the first type terminal device participates in communication in the communication system.

[0131] In this 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 to explain the solution, which is not limited in this specification.

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

[0133] The terminal device may also be referred to as a terminal, user equipment UE, mobile station (MS), mobile terminal (MT), or the like. The terminal device may be a mobile phone, a tablet computer (Pad), a computer with wireless reception and transmission capabilities, 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 smart grid, a wireless terminal for transportation safety, a wireless terminal for smart city, or a wireless terminal for smart home, etc.

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

[0135] This 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 this embodiment of the present application.

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

[0137] In order to facilitate understanding of the present application, a brief description of the random access process is provided below. The random access process is as follows:

[0138] The terminal device searches for a synchronization signal and physical broadcast channel (SSB), and the terminal device obtains a master information block (MIB) sent by a network device by searching for the SSB. The terminal device obtains time domain resources and frequency domain resources in a control resource set (CORESET) based on the MIB. The terminal device may detect downlink control information (DCI) for scheduling a system information block (SIB) in the CORESET, and receive SIB1 at a time-frequency location 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 may be received.

[0139] The terminal device transmits a physical random access channel (PRACH, i.e., Msg1) carrying a random access preamble in a random access opportunity (RACH occasion, RO) resource associated with the SSB based on the SIB1.

[0140] If the base station successfully receives the random access preamble and allows the UE to access, the base station will send a random access response (RAR), i.e., Msg2, to the UE in a preconfigured RAR window.

[0141] In addition, the UE monitors downlink control information (DCI) transmitted on the physical downlink control channel (PDCCH) in a preconfigured RAR window, where the DCI instructs the UE to obtain the RAR information from a Media Access Control (MAC) Protocol Data Unit (PDU) carried on the physical downlink shared channel (PDSCH).

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

[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 resource indicated by the uplink grant (UL grant) in the random access response. Then, the network device transmits a DCI to the terminal device, where the DCI indicates the time-frequency resource carrying a contention resolution message, i.e., Msg4. The terminal device detects the DCI and receives Msg4.

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

[0145] To facilitate understanding of the embodiments of the present application, the following provides a brief description of relevant concepts in the present application.

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

[0147] The first type terminal device has characteristics different from the second type terminal device, the characteristics being: The characteristics of the present invention include one or more of the following: bandwidth, number of supported or configured resources, number of transmit antenna ports and / or number of receive antenna ports, number of radio frequency channels, number of hybrid automatic repeat request (HARQ) processes, supported peak rates, application scenarios, delay requirements, processing capabilities, protocol releases, duplexing schemes, services, and the like. The following describes the first characteristic in detail.

[0148] Regarding the bandwidth or channel bandwidth or the maximum channel bandwidth supported or configured by the terminal device, the bandwidth of the first type terminal device and the bandwidth of the second type terminal device are different. For example, the bandwidth of the first type terminal device may be 20MHz, 10MHz, or 5MHz, and the bandwidth of the second type terminal device may be 100MHz. It can be understood that with the development of communication technology, the maximum channel bandwidth supported by the first type terminal device is no longer 20MHz, 10MHz, or 5MHz, but may evolve to a wider or narrower bandwidth, for example, 3MHz, 25MHz, or 50MHz.

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

[0150] Regarding the number of transmitting antenna ports and / or the number of receiving antenna ports, the number of transmitting antenna ports and / or the number of receiving antenna ports of the first type terminal device are different from those of the second type terminal device. For example, the number of transmitting antenna ports of the first type terminal device may be 1, and the number of receiving antenna ports of the first type terminal device may be 2; the number of transmitting antenna ports of the second type terminal device may be 2, and the number of receiving antenna ports of the second type terminal device may be 4.

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

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

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

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

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

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

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

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

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

[0160] It should also be understood that other types of terminal devices supporting the technical solutions of the present application, or future new types of terminal devices, also fall within the scope of protection of the present application.

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

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

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

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

[0165] 5. 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. 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] It should be understood that the reduced function terminal device is a relative concept. This is not limited in the present application. For example, the features of a new type of terminal device that may be developed in the future in at least one aspect of bandwidth, number of antennas, device power consumption, and the like are more complex than those of the existing legacy UE. In this case, the legacy UE is used as the first type terminal device in the present application, and the new type terminal device is used as the second type terminal device in the present application. Therefore, the new type of terminal device is still applicable to the embodiments of the present application and falls within the protection scope of the present application.

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

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

[0170] The end resource block (RB) is the resource block with the highest index in the bandwidth or the last resource block in the bandwidth.

[0171] It should be understood that a resource in this application may be a symbol, a slot, a minislot, a subframe, or the like. A resource in this application may alternatively be a subcarrier, a resource block, a carrier, a channel control element, 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 can be a resource block, a carrier, a channel control element, or the like.

[0173] To facilitate understanding of the embodiments of the present application, relevant terms will be explained in advance.

[0174] In the embodiments of the present application, a resource is described differently, for example a first resource or a bandwidth resource.

[0175] The first resource may 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 expressed 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 may be a common CORESET, and at least one RB in the common CORESET may not be within CORESET0. That is, CORESET a and CORESET0 may be different CORESETs.

[0176] The bandwidth resource may 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 may be an initial uplink BWP. For example, the bandwidth resource may be an uplink BWP. For example, the bandwidth resource may be a downlink BWP. For example, the bandwidth resource may be an initial downlink BWP. The bandwidth resource in this application is the bandwidth resource of the reduced-function 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] It should be understood that the first resource may be equivalent to a bandwidth resource, and the resource determination method in the embodiment is applicable to both the first resource and the bandwidth resource.

[0179] The time unit may be one of a subframe, a radio frame, a slot, a minislot, a symbol, a microsecond, a millisecond, or a second.

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

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

[0182] The physical uplink control channel for feeding back 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, a downlink shared channel, a demodulation reference signal, a positioning reference signal, and the like in the downlink BWP. The UE transmits one or more of an uplink control channel, an uplink shared channel, a random access channel, an uplink demodulation reference signal, and a sounding reference signal in the uplink BWP. For a UE capable of performing 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 multiplexed FDD UE can perform downlink reception and uplink transmission simultaneously. For example, a UE capable of TDD uplink and downlink decoupling 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, a PUSCH carrying Msg3, a retransmitted PUSCH carrying Msg3, and a PUCCH to feed back Msg4 on the initial UL BWP.

[0184] The UE transmits a random access preamble in a random access channel occasion (RACH occasion, RO). In the time domain, for one PRACH transmission occasion, up to eight RACH occasions can be configured in frequency division multiplexing. For example, the subcarrier spacing of the PRACH is 30 kHz, the bandwidth of one RO is 4.32 MHz, and the total bandwidth of the eight ROs in frequency division multiplexing is 34.56 MHz. There is a mapping relationship between the SSBs and the ROs. The number of ROs in each SSB is configured by using parameters in the system information block 1, and the SSBs are first mapped to the ROs in the time domain and then to the frequency domain. For example, every two ROs are mapped to the same SSB, the subcarrier spacing is 30 kHz, the number of ROs in frequency division multiplexing is eight, and the number of SSBs is eight. The frequency range of the eight ROs in frequency division multiplexing may exceed the maximum channel bandwidth supported by a reduced-capability terminal device. When accessing a cell, the UE obtains 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 in frequency to the frequency range in which Msg1 is transmitted and the frequency range in which the PUSCH carrying Msg3 is transmitted exceeds the maximum channel bandwidth of the UE, a frequency adjustment needs to be performed after the PRACH is transmitted in order to transmit the PUSCH carrying Msg3. For FDD UEs, or UEs capable of TDD uplink and downlink decoupling, the frequency adjustment occurs upon reception of 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, if the bandwidth resource is configured in a manner in which any RB can be used as the start RB of the bandwidth resource and any resource size can be used as the length of the bandwidth resource, the reduced-function terminal device needs to store all possible configurations, since the maximum channel bandwidth supported by the reduced-function terminal device is smaller than the carrier bandwidth. This results in a very high complexity of computing the bandwidth resource by the UE.

[0186] To solve the above-mentioned problems, an embodiment of the present application provides an information transmission method as shown in FIG.

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

[0188] It should be understood that 200 is optional, and the first reference point and the first bandwidth can also be predefined, which is not a limitation in this application.

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

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

[0191] It should be understood that the indication information may indicate the first reference point and the first bandwidth simultaneously as shown in Fig. 3, or may indicate the first reference point and the first bandwidth separately as shown in Fig. 4. One indication information may indicate the first reference point and a separate indication information may indicate the first bandwidth; or one indication information may indicate the first bandwidth and a separate indication information may indicate the first reference point; or the indication information may indicate only the first reference point or 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 conveyed in other information and other equivalent alternative solutions also fall within the scope of protection of the present application.

[0193] For example, the network device may first receive Channel State Information (CSI) from a first terminal device, where the CSI includes information about a subband size, and the network device determines a bandwidth of a first resource of the first terminal device based on the subband size.

[0194] It should be understood that the first reference point may be used as the location of the first resource, or the location 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 predefined, which is not a limitation in this application.

[0196] The first bandwidth may be determined based on one or more of a subband size reported by the CSI, a subcarrier spacing, and a bandwidth supported by the first terminal device.

[0197] Alternatively, the first offset may be determined based on one or more of a subband size reported by the CSI, a subcarrier spacing, and a first bandwidth supported by the first terminal device.

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

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

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

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

[0202] In a possible implementation, the first bandwidth may 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 a first transmission bandwidth, and the first transmission bandwidth is the number of resource blocks corresponding to the first channel bandwidth in different subcarrier intervals. For example, the correspondence relationship between the first channel bandwidth and the first transmission bandwidth in different subcarrier intervals is shown in Table 1.

[0203] When the subcarrier spacing is 15 kHz, the first transmission bandwidth corresponding to a bandwidth of 5 MHz is 25 RB. Similarly, the first bandwidth may be determined based on a positive integer multiple of 25 RB, for example, 25 RB, 50 RB, 75 RB, or 100 RB. In another example, when the subcarrier spacing is 30 kHz, the first transmission bandwidth corresponding to 5 MHz is 11 RB, and the first bandwidth may be determined based on a positive integer multiple of 11 RB. In another example, the first bandwidth may be determined based on a positive integer multiple of 10 RB. In another example, when the subcarrier spacing is 60 kHz, the first transmission bandwidth corresponding to 10 MHz is 11 RB. In this case, the bandwidth may be determined based on a positive integer multiple of 11 RB. Table 1. Relationship between subcarrier spacing 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, which is not limiting 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 previous embodiment, and the details will not be described again in this specification.

[0206] In another possible implementation, when the bandwidth supported by the first terminal device is a first transmission bandwidth, a resource block other than a positive integer multiple of the first transmission bandwidth is used to transmit the first control channel. The resource block other than a positive integer multiple of the first transmission bandwidth includes a first transmission resource and / or a second transmission resource. As shown in Fig. 5, the first transmission resource is M1 resource blocks with the smallest index in the second resource, the second transmission resource is M2 resource blocks with the largest index in the second resource, M1 and M2 are each positive integers, and the second resource is a BWP of a second type terminal device or a carrier bandwidth corresponding to a different subcarrier spacing.

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

[0208] Specifically, when the subcarrier spacing 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, and a positive integer multiple of the first transmission bandwidth is used as the first bandwidth, and a positive integer multiple of the first transmission bandwidth is 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 spacing is 15 kHz, a maximum of 10 first bandwidths and a total of 250 RBs can be configured, the number of RBs corresponding to the maximum channel bandwidth of 50 MHz is 270 RBs, and the remaining 20 RBs are distributed to the two ends of the carrier. In this case, the first transmission resource may be M1 resource blocks with the smallest index in the second resource, and the second transmission resource may be M2 resource blocks with the largest index in the second resource.

[0209] In the above 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 a 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 is determined based on a subband size reported by CSI.

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

[0212] Compared to a bandwidth that is not a multiple of 4 RBs, the number of subbands reported by the UE is reduced, reducing the complexity of the UE reports.

[0213] In a possible implementation, the first resource and / or the first offset are determined based on the subband size reported by the CSI and the resource allocation granularity of the control resource set. The first resource and / or the first offset may be determined based on a common multiple of the subband size reported by the CSI and the resource allocation granularity of the control resource set. For example, the subband size reported by the CSI may be 4 RBs, and the resource allocation granularity of the CORESET may be 6 RBs. A common multiple of 2, which is the number of RBs mentioned above, for example, a multiple of 12 RBs, may 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 a subband size and a granularity of a resource block group reported by the CSI. The first resource and / or the first offset may be determined based on a common multiple of the subband size and a granularity of a resource block group reported by the CSI. For example, the subband 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. A common multiple of the number of RBs included in the above two items, for example, a number of RBs that is a multiple of 4, 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 are determined based on the subband 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 are determined based on a common multiple of the subband 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 subband 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. A common multiple of the number of RBs included in the above items, for example, a number of RBs that is a multiple of 12, 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 subband size reported by CSI, thereby solving the problem that the mismatch between the subband and the bandwidth of the first resource causes the increase in the number of subbands reported by the UE, adding the resource allocation granularity of CORESET and resource block group as the basis for configuring the first bandwidth, avoiding the resource waste caused by the mismatch between the first bandwidth and the subband size reported by CSI, the resource allocation of CORESET and the resource allocation of data channel type 0, and reducing the complexity of reporting CSI by the UE, as shown in Figure 7.

[0217] It should be understood that the above solutions can be combined with the above implementations. For example, in the range of 25RB, a multiple of 12, for example 24RB, can be used as the first offset to avoid the above-described inconsistency 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 subcarrier spacing. There is a first association relationship between the first bandwidth and the subcarrier spacing; and / or there is a second association relationship between the first offset and the subcarrier spacing. For example, the first association relationship may be that a larger subcarrier spacing indicates a smaller first bandwidth. In another example, the second association relationship may be that a larger subcarrier spacing indicates a smaller first offset. Alternatively, the first association relationship may be that a larger subcarrier spacing indicates a proportional reduction in the size of the first resource. In another example, the second association relationship may be that a larger subcarrier spacing indicates a proportional reduction in the first offset.

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

[0220] In this solution, the number of RBs included in the same bandwidth is considered to be different when the subcarrier spacing is different. When NR supports different subcarrier spacing, 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 a first reference point, which may 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, common resource block 0, and point A. The indication information may be carried in SIB1 or a PDCCH to schedule SIB1.

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

[0224] It should be understood that the first terminal device may alternatively determine the first reference point in a predefined manner, and the first reference point may 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 the end RB of the second resource may be indicated by using signaling. As shown in Figure 8, two candidate bandwidths in the multiple candidate bandwidths are the end RBs of the second resource and are used as reference points, and the other three candidate bandwidths are the start RBs of the second resource and are used as reference points.

[0226] In another possible implementation, the location of the starting RB or the ending RB of the second resource may be indicated by using signaling, and the candidate bandwidths are successively determined by using the indicated reference points.

[0227] It should be understood that the numbers in this specification, and 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 limiting in this specification.

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

[0229] In this solution, a reference point is provided to configure the first resource, avoiding resource waste that occurs when the first resource occupies less than 1 RB 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 starting 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 (a) of Figure 9, the reference point is not necessarily the position of the starting RB or the ending RB of the second resource.

[0231] This solution can flexibly determine the starting position of the first resource, reduce instruction overhead, and avoid resource allocation inconsistency.

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

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

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

[0235] The first reference point and the first offset can be determined by using the solution in the above embodiment, and the details are not described again in this specification. For example, the first offset can be an integer multiple of 25RB, and the position of the RB of start_RB+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 indicated, start_RB is used as the start position of the first resource by default.

[0237] The first terminal device receives second information sent 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 may be 5 MHz, 10 MHz, or 20 MHz (or 25 RB, 50 RB, or 100 RB), and the first offset is an integer multiple of 25 RB. In this case, a total of 30 states need to be indicated, and 5 bits are required.

[0238] In this solution, the complexity and flexibility of the instruction are comprehensively considered to reduce the bit overhead for the first resource and reduce the computing complexity of the UE.

[0239] In another embodiment of the present application, the first reference point is used as a reference point of the location of the first bandwidth, and may be the location of the first random access resource. In other words, the location of the first resource is determined based on the location 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 a first transmission of a PUSCH carrying Msg3 (the first transmission of Msg3), a first hop transmission of a first transmission of a PUSCH carrying Msg3 (the first hop transmission of the first transmission of Msg3), a transmission after the first transmission of a PUSCH carrying Msg3 (a transmission after the first transmission of Msg3, including a retransmission of Msg3 or a repetition of Msg3), a first transmission of a PUSCH carrying Msg3, the first hop transmission of the transmission after the first transmission of Msg3 (first hop transmission of the transmission after the first transmission of Msg3), the first transmission of the PUCCH of Msg4 (first transmission of the PUCCH of Msg4), the first hop transmission of the first transmission of the PUCCH of Msg4 (first hop transmission of the first transmission of the PUCCH of Msg4), the transmission after the first transmission of the PUCCH of Msg4 (transmission after the first transmission of the PUCCH of Msg4), and the first hop transmission of the transmission after the first transmission of the Msg4PUCCH (first hop transmission of the transmission 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 subcarrier of the first RB of the first random access resource; or the position of the first random access resource includes the first subcarrier of the last RB of the first random access resource; or the position of the first random access resource includes the first subcarrier of the central RB of the first random access resource: or the position of the first random access resource includes the last subcarrier of the first RB of the first random access resource; or the position of the first random access resource includes the last subcarrier of the last RB of the first random access resource; or the position of the first random access resource includes the last subcarrier of the central RB of the first random access resource.

[0243] It should be understood that the size of the first random access resource may 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 subcarrier of the first RB of the first resource; or the position of the first resource includes the first subcarrier of the last RB of the first resource; or the position of the first resource includes the first subcarrier of the central RB of the first resource; or the position of the first resource includes the last subcarrier of the first RB of the first resource; or the position of the first resource includes the last subcarrier of the last RB of the first resource; or the position of the first resource includes the last subcarrier of the central RB of the first resource.

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

[0246] It should be understood that the location of the first random access resource may be predefined or may be 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 or the first subcarrier of the first RB of the fifth random access resource. 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 or the first subcarrier of the first RB of the fifth random access resource is determined as the first RB or the first subcarrier of the first RB of the first resource. The predefined position of the first random access resource is used as the end position of the position of the first resource.

[0248] The location of the first random access resource may also be indicated by using a first signaling, which may be carried in one of the following: a system information block 1 (SIB1), a DCI for scheduling SIB1, a random access response (RAR), a DCI for scheduling RAR, an uplink grant for scheduling Msg3, Msg3, a contention resolution message, and a DCI for scheduling a contention resolution message. The first signaling may also be a bit or a bit state of the aforementioned information.

[0249] An embodiment of the present application provides an information transmission method, as shown in FIG.

[0250] 1101: A network device sends first information and a first parameter to a 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 terminal device, and the size of each of the M bandwidth resources is equal to or smaller than a 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 may also be predefined.

[0252] 1102: A first terminal device obtains first information and a first parameter, and the first terminal device determines a first bandwidth resource based on the first information and the first parameter.

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

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

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

[0256] The random access channel configuration information may 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 may transmit the PRACH may 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 multiple 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 frequency in one time unit. The value of the first parameter may be 1, 2, 4, 8, or the like.

[0258] For example, if 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 the 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 spacings; or 10 MHz or the number of RBs corresponding to 10 MHz at different subcarrier spacings; or 20 MHz or the number of RBs corresponding to 20 MHz at different subcarrier spacings.

[0260] In a possible implementation, when M=2, one of the two bandwidth resources includes resources of random access channel opportunities {0,1,2,3}, and the other bandwidth resource includes 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 resources of all random access channel opportunities, and the first terminal device may determine the center frequency for transmitting the PRACH based on the bandwidth resources. This can reduce the number of frequency adjustment times.

[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 in the M bandwidth resources; and may determine other (M-1) bandwidth resources in the M bandwidth resources based on the first bandwidth resource.

[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 configuring a starting position and a resource size. The remaining (M-1) bandwidth resources may be successively sorted by using the end resource block of the first bandwidth resource as the starting resource block. In this way, the M bandwidth resources may be successively determined. The configuration of the bandwidth resources does not consider the position of the RO and is more flexible.

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

[0264] For example, if 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 of N random access channel opportunities, where the resources of the 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 of the N random access channel opportunities may be resources of N lower random access channel opportunities sorted in ascending order of frequency resource position. Specifically, N=4, and the value of the first parameter may be 8. The predefined resources of the N random access channel opportunities need to include resources of the random access channel opportunities in which the random access preamble is transmitted. This solution may reduce bit overhead, ensure that frequency adjustment does not need to be performed for the transmission of the random access preamble, and reduce the number of frequency adjustment times. For example, the first bandwidth resource is determined based on the resources of the random access channel opportunities in which the random access preamble is transmitted. The first bandwidth resource is a resource starting at the first RB or the first subcarrier of the first RB of the resource of the random access channel opportunity on which the random access preamble is transmitted; or the first bandwidth resource is determined based on the resource of the random access channel opportunity on which the random access preamble is transmitted; or the first bandwidth resource is a resource ending at the last RB or the last subcarrier of the last RB of the resource of the random access channel opportunity on which the random access preamble is transmitted. A possible scenario of this solution is as follows: the first type terminal device and the second type terminal device receive the same system information, receive the same first parameter, and configure only one bandwidth resource.

[0265] It should be understood that the scenario is an example, which is not limiting 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 starting resource block of the first bandwidth resource is identical to the starting 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 starting 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 r, where r is an integer greater than or equal to 0. The starting resource block of the first bandwidth resource being identical to the starting resource block of the first random access channel opportunity may also be understood as the frequency position of the starting resource block of the first bandwidth resource being aligned with the frequency position of the starting 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 the present solution is as follows: the first type terminal device and the second type terminal device receive the same system information, receive the same first parameter, and configure only one bandwidth resource.

[0267] For example, the first indication information may include one bit, and the first indication information may indicate an index of the first random access channel opportunity in the random access channel opportunity index {0, 4}. If the first indication information indicates an index 0, the first bandwidth resource may include resources whose random access channel opportunity index is {0, 1, 2, 3}. If the first indication information indicates an index 4, the first bandwidth resource may include resources whose 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 on which the random access preamble is transmitted. The first bandwidth resource is a resource starting at the first RB or the first subcarrier of the first RB of the resource of the random access channel opportunity on which the random access preamble is transmitted; or the first bandwidth resource is determined based on the resource of the random access channel opportunity on which the random access preamble is transmitted; or the first bandwidth resource is a resource ending at the last RB or the last subcarrier of the last RB of the resource of the random access channel opportunity on which the random access preamble is transmitted. The two possible locations of the first bandwidth resource shown in this solution may include resources of all random access channel opportunities, which may ensure 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.

[0269] For example, the first indication information may include two bits, and the first indication information indicates an index of the first random access channel opportunity in the random access channel opportunity index {1, 2, 3, 4}. If the first indication information indicates index 1, the first bandwidth resource may include resources whose random access channel opportunity index is {1, 2, 3, 4}. If the first indication information indicates index 2, the first bandwidth resource may include resources whose random access channel opportunity index is {2, 3, 4, 5}. If the first indication information indicates index 3, the first bandwidth resource may include resources whose random access channel opportunity index is {3, 4, 5, 6}. If the first indication information indicates index 4, the first bandwidth resource may include resources whose random access channel opportunity index is {4, 5, 6, 7}. The four possible positions of the first bandwidth resource shown in the present solution may include resources of 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 has a more flexible indication.

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

[0271] For example, the first indication information may include 3 bits, and the first indication information may further indicate an index of the first random access channel opportunity in the random access channel opportunity index {0,1,2,3,4,5,6,7}. If the first indication information indicates an index 0, the first bandwidth resource may include resources whose random access channel opportunity index is {0,1,2,3}. If the first indication information indicates an index 1, the first bandwidth resource may include resources whose random access channel opportunity index is {1,2,3,4}. If the first indication information indicates an index 2, the first bandwidth resource may include resources whose random access channel opportunity index is {2,3,4,5}. If the first indication information indicates an index 3, the first bandwidth resource may include resources whose random access channel opportunity index is {3,4,5,6}. If the first indication information indicates an index 4, the first bandwidth resource may include resources whose random access channel opportunity index is {4,5,6,7}. If the first indication information indicates index 5, the first bandwidth resource may include resources whose random access channel opportunity index is {5,6,7}. If the first indication information indicates index 6, the first bandwidth resource may include resources whose random access channel opportunity index is {6,7}. If the first indication information indicates index 7, the first bandwidth resource may include resources whose random access channel opportunity index is {7}. The eight possible positions of the first bandwidth resource indicated in the present solution may include resources of 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 has more flexible indication.

[0272] For example, the index of the first random access channel opportunity may also be determined based on the case of whether the first indication information exists. The absence of the first indication information may also be understood as the first terminal device not acquiring the first indication information. For example, the first indication information may be a default. If the first indication information is a default, the first random access channel opportunity is a random access channel opportunity with an index of 0. This solution may be combined with the above-mentioned embodiment. For example, this solution may be applied together with the case where the first indication information may include two bits. If the first indication information is a default, the first random access channel opportunity is a random access channel opportunity with an index of 0; or, if the first indication information includes two bits, 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}.

[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. A possible scenario of the present solution is as follows: The first type terminal device and the second type terminal device receive the same system information, receive the same first parameter, and configure multiple bandwidth resources.

[0274] It should be understood that the scenario is an example, which is not limiting in this application.

[0275] Different bandwidth resources in the M bandwidth resources may 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 the eight random access channel opportunities. For example, as shown in FIG. 13, one of the two bandwidth resources includes a resource of a random access channel opportunity with an index of {0,1,2,3}, and the other bandwidth resource includes a resource of a random access channel opportunity with an index of {4,5,6,7}. The first terminal device may determine a first bandwidth resource from the two bandwidth resources. The first bandwidth resource may be a bandwidth resource with an index of {0,1,2,3}, or may be a bandwidth resource with an index of {4,5,6,7}. The first bandwidth resource may be determined based on a resource of a random access channel opportunity through which a random access preamble is transmitted. The solution reduces bit overhead, ensures that frequency adjustments do not need to be performed for 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 in the M bandwidth resources. The second bandwidth resource may be different from the first bandwidth resource. That is, the resource of the random access channel opportunity included in the second bandwidth resource is not completely the same as the resource of the random access channel opportunity included in the first bandwidth resource. Alternatively, the second bandwidth resource may be the same as the first bandwidth resource. That is, the resource of the random access channel opportunity included in the second bandwidth resource is the same as the resource of the random access channel opportunity 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 a random access response message, a contention resolution message (Msg4), and downlink control information for scheduling a contention resolution message, and / or the second indication information may be included in an uplink grant (UL grant) of each medium access control random access response (MAC RAR) in the random access response message. The second indication information may indicate a second channel bandwidth for each terminal device in the first type terminal device, and the second indication information may be included in an UL grant of the MAC RAR.

[0278] The second indication information may indicate second channel bandwidth resources for a group of terminal devices in the first type terminal device, and the second indication information may be included in the RAR, a DCI for scheduling the RAR, Msg4, and a DCI for scheduling the 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 MAC RAR, and instructs the first terminal device to send message 3 in the random access process or send a physical uplink control channel for feedback to a contention resolution message on the second bandwidth resource.

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

[0281] The bandwidth resource for the first terminal device to transmit the random access preamble may be different from the bandwidth resource for the first terminal device to transmit the message 3 in the random access process. The bandwidth resource for the first terminal device to transmit the random access preamble may be different from the bandwidth resource used by the first terminal device to transmit the physical uplink control channel for feedback to the contention resolution message. The bandwidth resource for the first terminal device to transmit the random access preamble may be different from the bandwidth resource for the first terminal device to transmit the message 3 in the random access process and the physical uplink control channel for feedback to the contention resolution message. The bandwidth resource used by the first terminal device to transmit the message 3 in the random access process may be different from the bandwidth resource for the first terminal device to transmit the physical uplink control channel for feedback to the contention resolution message. For example, the fifth indication information may be carried in one or more of the RAR, the DCI for scheduling the RAR, the Msg4, the DCI for scheduling the Msg4, and the UL grant of the MAC RAR, and indicates the third bandwidth resource. The first terminal device sends a message 3 in a random access process on the second bandwidth resource, and the first terminal device sends a physical uplink control channel for feedback to a contention resolution message on the third bandwidth resource. The third bandwidth resource is the same as or different from the first bandwidth resource, and the third bandwidth resource is the same as or different from the second bandwidth resource. In another example, when the first terminal device sends a random access preamble on the first bandwidth resource, and the second indication information is a DCI for scheduling an RAR and indicates a second bandwidth resource, the first terminal device sends a message 3 in a random access process or sends 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 a DCI for scheduling Msg4 and indicates a third bandwidth resource, in which the first terminal device transmits a physical uplink control channel for feeding back 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 does not need to be performed 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 a physical uplink control channel for feedback to message 3 in the random access process and a contention resolution message on the second bandwidth resource. This may take into account load balancing based on the reduction of the number of frequency adjustment times. Alternatively, the first terminal device may transmit a random access preamble on the first bandwidth resource, transmit a first hop transmission of message 3 in the random access process on the second bandwidth resource, and transmit a physical uplink control channel for feedback to second hop transmission of message 3 in the random access process and a contention resolution message on the third bandwidth resource. This helps the first terminal device obtain frequency diversity gain of message 3 in the random access process. Alternatively, the first terminal device may send a random access preamble on the first bandwidth resource, send a message 3 in the random access process and a first hop transmission of the physical uplink control channel for feedback to the contention resolution message on the second bandwidth resource, and send a second hop transmission of the physical uplink control channel for feedback to the contention resolution message on the third resource, which helps achieve frequency diversity gain of the physical uplink control channel and solve the resource fragmentation problem caused by resource allocation of the physical uplink control channel.

[0283] For example, the first terminal device transmits a random access preamble on the first bandwidth resource, and the first terminal device receives the third indication information. The resource for transmitting information by the first terminal device 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 the second bandwidth resource / third bandwidth resource exists. If the second bandwidth resource / 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 a 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 a 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 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 one or more of RAR, DCI for scheduling RAR, Msg4, DCI for scheduling Msg4, and UL grant of MAC RAR. For example, the third indication information is DCI for scheduling RAR, and the third indication information is applied to available bits in DCI to indicate 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 transmit a physical uplink control channel for feedback to a contention resolution message is identical to the first bandwidth resource for the first terminal device to transmit a random access preamble.

[0288] In another example, when the bit status is a second bit state, the bandwidth resource for the first terminal device to transmit message 3 in the random access process and / or 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 a random access preamble. For example, when the bit status is a second bit status, the bandwidth resource for the first terminal device to transmit message 3 in the random access process and / or 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 a random access preamble.

[0289] In a possible implementation, the application of the random access channel configuration information is associated with the value of a 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 terminal device and the second type 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 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 terminal device. Because the maximum channel bandwidth supported by the first type terminal device is smaller than the size of the resource of the random access channel opportunity corresponding to the value of the first parameter greater than 4, 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 terminal device. This facilitates the coexistence of the first type terminal device and the second type terminal device in the coverage of the same network device.

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

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

[0293] For example, when the random access channel configuration information is used for the first type terminal device and the second type terminal device, and the value of the first parameter is greater than 4, the first 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 first type terminal device and the second type terminal device, i.e., is not independently configured for the first type 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 first type terminal device and the second type terminal device, and the value of the first parameter is greater than 4, the first 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 first type terminal device and the second type terminal device, i.e., is not independently configured for the first type terminal device.

[0295] For example, when the random access channel configuration information is used for the first type terminal device and the second type terminal device, and the value of the first parameter is less than or equal to 4, the first terminal device transmits uplink information or receives downlink information on a bandwidth resource including a random access channel opportunity whose number is the first parameter. For example, the random access channel configuration information is configured by both the first type terminal device and the second type terminal device, i.e., is not independently configured for the first type 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 determining the first bandwidth resource and the second bandwidth resource, please refer to the method in the above embodiment, and the details will not be described again here.

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

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

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

[0300] For example, the type of associated configuration may be determined based on whether or not the indication information is present.

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

[0302] It should be understood that the above-mentioned correspondence between the indication information or the bit status of the indication information and the related configuration is merely an example, which is not limiting in the present application.

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

[0304] In this application, the bandwidth resource for uplink transmission or the bandwidth resource for downlink reception is determined so that 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, which can avoid frequency adjustments between frequent uplink transmissions and / or frequency adjustments between frequent downlink receptions, improve symbols available for data transmission, improve resource utilization, avoid increasing the power consumption of the UE, and reduce the implementation complexity of the UE.

[0305] Each embodiment described in this specification may be an independent solution or may be combined based on internal logic, all of which are within the protection scope of this application.

[0306] In the above embodiments provided in the present application, the methods provided in the embodiments of the present application are described in terms of interactions between devices. To implement the functions in the methods provided in the above embodiments of the present application, the network device or the terminal device may include a hardware structure and / or a software module, and may implement the above functions in the form of a hardware structure, a software module, or a combination of a hardware structure and a software module. Whether a function among the above functions is performed using a hardware structure, a software module, or a combination of a hardware structure and a software module depends on the specific application and design constraints of the technical solution.

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

[0308] Similar to the above concept shown in FIG. 14, the embodiment of the present application further provides an apparatus 1300 configured to implement the functions of a network device or a terminal device in the above 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 this embodiment of the present application, the communication unit may also be referred to as a transceiver unit and may have a transmitting unit and / or a receiving unit configured to perform the transmitting and receiving steps of the network device or the terminal device, respectively, in the aforementioned method embodiments.

[0310] In the following, the communication device provided in the embodiment of the present application is described in detail with reference to Fig. 14 and Fig. 15. It should be understood that the description of the embodiment of the device corresponds to the description of the embodiment of the method. Therefore, for the contents not described in detail, please refer to the above embodiment of the 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, a transceiver machine, a transceiver device, or the like. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, a component in the communication unit 1320 configured to implement a receiving function may be considered as a receiving unit, and a component in the communication unit 1320 configured to implement a transmitting function may be considered as a transmitting unit. In other words, the communication unit 1320 includes a receiving unit and a transmitting unit. The communication unit may also be referred to as a transceiver machine, a transceiver, an interface circuit, or the like in some cases. The receiving unit may also be referred to as a receiver machine, a receiver, a receiving circuit, or the like in some cases. The transmitting unit may also be referred to as a transmitter machine, a transmitter, a transmitting circuit, or the like in some cases.

[0312] When the communication device 1300 performs the function of a first terminal device in the procedures shown in any one of Figures 2 to 13 in the above-mentioned embodiments, the processing unit is configured to determine information transmission resources based on 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 performs the functions of a network device in the procedures shown in any one of Figures 2 to 13 in the above-mentioned embodiments, the processing unit is configured to configure or determine resources in a predefined manner; the communication unit is configured to receive and transmit information.

[0314] The above is merely an example. The processing unit 1310 and the communication unit 1320 may further perform other functions. For more detailed description, please refer to the relevant description in the method embodiments shown in Figures 2 to 13 or other method embodiments. Here, details will not be described again.

[0315] Fig. 15 illustrates an apparatus 1400 according to an embodiment of the present application. The apparatus illustrated in Fig. 15 may be a hardware circuit implementation of the apparatus illustrated in Fig. 14. The communication apparatus is applicable to the above-mentioned flow charts and performs the functions of the terminal device or the network device in the above-mentioned method embodiments. For ease of explanation, Fig. 14 illustrates only the main components of the communication apparatus.

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

[0317] When the communication device 1400 is configured to implement the methods shown in Figures 2 to 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 device is a chip used in a terminal device, the chip in the terminal device implements the functions of the terminal device in the above-mentioned method embodiment. The chip in the terminal device receives information from another module (e.g., a radio frequency module or an antenna) in the terminal device, where the information is transmitted by a 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) in 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 above-mentioned method embodiment. The chip in the network device receives information from another module (e.g., a radio frequency module or an antenna) in 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) in the network device, where the information is transmitted by the network device to a terminal device.

[0320] It may be understood that the processor in the embodiments of the present application may be a Central Processing Unit (CPU), or may be 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, a transistor logic device, a hardware component, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor or the like.

[0321] In the embodiment of the present application, the processor may be a Random Access Memory (RAM), a Flash memory, a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a register, a hard disk, a removable hard disk, a CD-ROM, or any other form of storage medium well known in the art. For example, the storage medium is coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium may be a component of the processor. The processor and the storage medium may be located in an ASIC. In addition, the ASIC may be located in a network device or a terminal device. Of course, the processor and the storage medium may alternatively be present 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 may be provided as a method, a system, or a computer program product. Thus, the present application may use the form of a hardware-only embodiment, a software-only embodiment, or an embodiment involving a combination of software and hardware. Furthermore, the present application may use the form of a computer program product embodied in one or more computer usable storage mediums (including, but not limited to, disk memory, optical memory, and the like) that contain computer usable program code.

[0323] The present application is described with reference to flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the present application. It should be understood that computer program instructions can be used to implement each step and / or each block in the flowcharts and / or block diagrams, and combinations of steps and / or blocks in the flowcharts and / or block diagrams. 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, such that the instructions executed by the processor of the computer or any other programmable data processing device generate an apparatus for implementing a particular function in one or more steps in the flowcharts and / or one or more blocks in the block diagrams.

[0324] Because these computer program instructions may be stored in a computer-readable memory that can instruct a computer or any other programmable data processing device to operate in a particular manner, the instructions stored in the computer-readable memory result in an intermediate article, including an instruction apparatus, that implements a particular function in one or more steps of the flowcharts and / or one or more blocks of the block diagrams.

[0325] It is obvious that a person skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. As long as these modifications and variations of the present application fall within the scope of protection defined by the following claims and their equivalent technologies, the present application is intended to cover these modifications and variations.

[0326] The above description is merely a specific implementation of the present application, and is not intended to limit the scope of protection of the present application. Any variations or replacements that are easily conceived by those skilled in the art within the technical scope disclosed in this application shall be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims. (Other possible items) (Item 1) receiving, by a first terminal device, first information, where the first information indicates M bandwidth resources, M being a positive integer, the first terminal device being a first type terminal device, and a size of each of the M bandwidth resources being equal to or less than a maximum channel bandwidth supported by the first terminal device; receiving, by the first terminal device, a first parameter, where the first parameter is a 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 uplink information or receiving downlink information on the first bandwidth resource by the first terminal device; An information transmission method comprising: (Item 2) the value of the first parameter is greater than 4; When M=1, the M bandwidth resources are the first bandwidth resources, and the first bandwidth resources include predefined resources 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 first bandwidth resources, and a starting resource block of the first bandwidth resource is the same as a starting resource block of a 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) 3. The method according to claim 1, wherein the value of the first parameter is 8, and the indices of the random access channel opportunities sorted in a first order are from 0 to 7, and the first order comprises an ascending order of frequency. (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 an index of the first random access channel opportunity at index {0,4}; or when the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0,1,2,3,4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {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 indicating the M bandwidth resources; a size of each of the M bandwidth resources is predefined; or When M=2, one of the bandwidth resources includes resources of random access channel opportunities {0, 1, 2, 3}, and the other of the bandwidth resources includes resources of random access channel opportunities {4, 5, 6, 7}; or When M>1, the remaining (M-1) bandwidth resources are determined based on a first candidate bandwidth resource, and the first candidate bandwidth resource is indicated by using a first signaling. 5. The method according to any one of items 1 to 4. (Item 6) When M>1, the method further comprises: 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, on the second bandwidth resource, a physical uplink control channel for feedback to a message 3 in a random access process or a contention resolution message; The method of 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 a 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 bandwidth resources for the first terminal device to transmit the message 3 in the random access process and / or the physical uplink control channel for feedback to the contention resolution message; 8. The method according to item 6 or 7, comprising: (Item 9) The method comprises: When the bit status of the third indication information is a first bit state, transmitting, by the first terminal device, on the first bandwidth resource, the physical uplink control channel for feedback to the message 3 in the random access process and / or the contention resolution message; or transmitting, by the first terminal device, on the second bandwidth resource, the physical uplink control channel for feeding back the message 3 in the random access process and / or the contention resolution message when the bit status of the third indication information is a second bit state. The method of claim 8, comprising: (Item 10) The method further comprises: obtaining, by the first terminal device, fourth indication information, where the fourth indication information indicates that an association configuration between SSBs and random access channel opportunities is a first association configuration or a second association configuration, the association configuration being an association configuration between a number of SSBs and a number of random access channel opportunities; The method of item 1, comprising: (Item 11) The method further comprises: When the first terminal device receives the fourth indication information, the fourth indication information indicates that the association configuration between the SSB and the random access is the first association configuration; or, when the first terminal device does not receive the fourth indication information, the association configuration between the SSB and the random access is the second association configuration; or When the first terminal device receives the fourth indication information, the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is a second association configuration; or when the first terminal device does not receive the fourth indication information, the association configuration between the SSB and the random access channel opportunity is a first association configuration. The method according to item 1, comprising: (Item 12) 12. The method according to any one of claims 1 to 11, wherein the first parameter is carried in random access channel configuration information. (Item 13) 13. The method of any one of claims 1 to 12, wherein the first information includes system information. (Item 14) sending, by a network device, first information to a first terminal device, where the first information indicates M bandwidth resources, M being a positive integer, a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by the first terminal device, and the first terminal device being a first type terminal device; transmitting, by the network device, a first parameter, where the first parameter is a 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 or transmitting downlink information to the first terminal device on a first bandwidth resource, 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: (Item 15) the value of the first parameter is greater than 4; When M=1, the M bandwidth resources are the first bandwidth resources, and the first bandwidth resources include predefined resources 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 sends first indication information, where the first indication information indicates a first random access channel opportunity, a starting resource block of the first bandwidth resource is the same as a starting resource block of the first random access channel opportunity, and the M bandwidth resources are the first bandwidth resources; or When M>1, each of the M bandwidth resources includes a resource corresponding to at least one random access channel opportunity. Item 15. The method according to item 14. (Item 16) Item 16. The method according to item 14 or 15, wherein the value of the first parameter is 8, and the indices of the random access channel opportunities sorted in a first order are from 0 to 7, and the first order comprises an ascending order of frequency. (Item 17) When the first indication information includes 1 bit, the first indication information indicates an index of the first random access channel opportunity at index {0, 4}; or When the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity in index {1, 2, 3, 4}; or When the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0, 1, 2, 3, 4}; or When the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {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. Item 17. The method according to item 16. (Item 18) the first information indicating the M bandwidth resources; a size of each of the M bandwidth resources is predefined; or When M=2, one of the bandwidth resources includes resources of random access channel opportunities {0, 1, 2, 3}, and the other of the bandwidth resources includes resources of random access channel opportunities {4, 5, 6, 7}; or When M>1, the network device transmits a 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. 18. The method according to any one of items 14 to 17. (Item 19) When M>1, the method further comprises: transmitting, by the network device, second indication information, where the second indication information indicates a second bandwidth resource; receiving, by the network device, a random access preamble on the first bandwidth resource; and receiving, by the network device, on the second bandwidth resource, a physical uplink control channel for feedback to a message 3 in a random access process or a contention resolution message; Item 15. The method of 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 a random access response message; Item 19. The method according to item 19. (Item 21) When M>1, the method further comprises: receiving, by the network device, the random access preamble on the first bandwidth resource; and sending, by the network device, third indication information, where the third indication information indicates bandwidth resources for the first terminal device to transmit the physical uplink control channel for feedback to the message 3 in the random access process and / or the contention resolution message; 21. The method according to item 19 or 20, comprising: (Item 22) The method comprises: receiving, by the network device, on the first bandwidth resource, the physical uplink control channel for feeding back the message 3 in the random access process and / or the contention resolution message when the bit status of the third indication information is a first bit state; or receiving, by the network device, on the second bandwidth resource, the physical uplink control channel for feeding back the message 3 in the random access process and / or the contention resolution message when the bit status of the third indication information is a second bit state; 22. The method of claim 21, comprising: (Item 23) The method further comprises: sending, by the network device, fourth indication information, where the fourth indication information indicates that an association configuration between SSBs and random access channel opportunities is a first association configuration or a second association configuration, the association configuration being an association configuration between a number of SSBs and a number of random access channel opportunities; The method of item 1, comprising: (Item 24) The method further comprises: If the network device sends fourth indication information, the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is a first association configuration; or if the network device does not send fourth indication information, the association configuration between the SSB and the random access channel opportunity is a second association configuration; or When the network device sends the fourth indication information, the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is a second association configuration; or when the network device does not send the fourth indication information, the association configuration between the SSB and the random access channel opportunity is a first association configuration; The method according to item 1, comprising: (Item 25) 25. The method according to any one of claims 14 to 24, wherein the first parameter is carried in random access channel configuration information. (Item 26) 26. The method of any one of claims 14 to 25, wherein the first information includes system information. (Item 27) A communications device comprising a processor, the processor connected to a memory, the memory configured to store a computer program, and the processor configured to execute the computer program stored in the memory, such that the device performs the method according to any one of items 1 to 13 or the method according to any one of items 14 to 26. (Item 28) A computer-readable storage medium configured to store a computer program, the computer program being capable of causing the computer to execute the method according to any one of items 1 to 13 when executed on a computer, or the computer being capable of causing the computer to 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 execute the method according to any one of items 1 to 13 or to read instructions for executing the method according to any one of items 14 to 26. (Item 30) 27. A communication device comprising a module configured to perform the method according to any one of items 1 to 13 or items 14 to 26. (Item 31) 27. A computer program product comprising computer program code, which when executed implements the method according to any one of items 1 to 13 or 14 to 26.

Claims

1. receiving first information, where the first information indicates M bandwidth resources, M being a positive integer, a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by a first terminal device, the first terminal device being a first type terminal device; receiving a first parameter, where the first parameter is a 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 uplink information or receiving downlink information on the first bandwidth resource; and receiving third indication information, where the third indication information indicates bandwidth resources for the first terminal device to transmit a Physical Uplink Control Channel (PUCCH) for feeding back a contention resolution message; An information transmission method comprising:

2. The step of transmitting uplink information or receiving downlink information on the first bandwidth resource comprises: transmitting a random access preamble on the first bandwidth resource. The information transmission method according to claim 1 , comprising:

3. The information transmission method according to claim 2 , wherein a bit status of the third indication information indicates the bandwidth resource for transmitting the physical uplink control channel for feeding back the contention resolution message.

4. The information transmission method according to claim 2 or 3, wherein the third indication information is identifier information, and the identifier information is included in higher layer signaling.

5. The information transmission method according to claim 1 , wherein the first type terminal device is a reduced functionality (REDCAP) terminal device.

6. 5. The method of claim 4, wherein the identifier information comprises one bit.

7. An information transmission method described in any one of claims 1 to 6, wherein a bit status of the third instruction information is a first bit state or a second bit state, and a bandwidth resource for transmitting the PUCCH when the bit status of the third instruction information is the first bit state is different from a bandwidth resource for transmitting the PUCCH when the bit status of the third instruction information is the second bit state.

8. The information transmission method of claim 4, wherein the higher layer signaling is System Information Block 1 (SIB1).

9. When the value of the first parameter is greater than 4 and M=1, the M bandwidth resources are the first bandwidth resources, and the first bandwidth resources include predefined resources 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 the value of the first parameter is greater than 4 and M=1, the M bandwidth resources are first bandwidth resources, a starting resource block of the first bandwidth resource is the same as a starting resource block of a first random access channel opportunity, and the first random access channel opportunity is indicated by first indication information; or When the value of the first parameter is greater than 4 and M>1, each of the M bandwidth resources includes a resource corresponding to at least one random access channel opportunity.

9. The information transmission method according to any one of claims 1 to 8.

10. 10. The method of claim 9, wherein the value of the first parameter is 8, the indexes of the random access channel opportunities sorted in a first order are from 0 to 7, and the first order comprises ascending order of frequency.

11. The information transmission method further comprises: receiving the first indication information, where when the first indication information includes 1 bit, the first indication information indicates an index of the first random access channel opportunity at index {0, 4}; or when the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0, 1, 2, 3, 4}; or when the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0, 1, 2, 3, 4, 5, 6, 7}; or When the first indication information is not received, the index of the first random access channel opportunity is 0. The information transmission method according to claim 10, comprising:

12. the first information indicating the M bandwidth resources; a size of each of the M bandwidth resources is predefined; or When M=2, one of the bandwidth resources includes resources for random access channel opportunities {0, 1, 2, 3}, and the other of the bandwidth resources includes resources for random access channel opportunities {4, 5, 6, 7}; or When M>1, the remaining (M-1) bandwidth resources are determined based on a first candidate bandwidth resource, and the first candidate bandwidth resource is indicated by using a first signaling.

12. The information transmission method according to any one of claims 9 to 11.

13. When M>1, the information transmission method further comprises: receiving second indication information, wherein the second indication information indicates a second bandwidth resource; transmitting a random access preamble on the first bandwidth resource; and transmitting a physical uplink control channel for feeding back a message 3 in a random access process or a contention resolution message on the second bandwidth resource.

9. The information transmission method according to claim 1 , comprising:

14. 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 a random access response message; 14. The information transmission method according to claim 13.

15. The information transmission method further comprises: obtaining fourth indication information, where the fourth indication information indicates that an association configuration between the SSB and the random access channel opportunity is a first association configuration or a second association configuration, the association configuration being an association configuration between a number of the SSB and a number of the random access channel opportunity; The information transmission method according to claim 1 , comprising:

16. The information transmission method further comprises: If a fourth indication information is received, the fourth indication information indicates that the association configuration between the SSB and the random access is a first association configuration; or if a fourth indication information is not received, the association configuration between the SSB and the random access is a second association configuration; or If a fourth indication information is received, the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is a second association configuration; or if a fourth indication information is not received, the association configuration between the SSB and the random access channel opportunity is a first association configuration.

2. The information transmission method according to claim 1, comprising:

17. 17. The method of claim 1, wherein the first parameter is conveyed in random access channel configuration information.

18. The method of claim 1 , wherein the first information comprises system information.

19. transmitting first information to a first terminal device, where the first information indicates M bandwidth resources, M being a positive integer, a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by the first terminal device, and the first terminal device being a first type terminal device; transmitting a first parameter, where the first parameter is a number of random access channel opportunities for frequency division multiplexing in a time unit; receiving uplink information from the first terminal device or transmitting downlink information to the first terminal device on a first bandwidth resource, 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 indicates a bandwidth resource for the first terminal device to transmit a physical uplink control channel (PUCCH) for feeding back a contention resolution message; An information transmission method comprising:

20. The step of receiving uplink information from the first terminal device or transmitting downlink information to the first terminal device on a first bandwidth resource, comprising: receiving a random access preamble on the first bandwidth resource.

20. The information transmission method according to claim 19, comprising:

21. The information transmission method according to claim 20, wherein a bit status of the third indication information indicates the bandwidth resource for the physical uplink control channel for feeding back the contention resolution message.

22. The information transmission method according to claim 20, wherein the third indication information is identifier information, and the identifier information is included in higher layer signaling.

23. 23. The information transmission method according to claim 19, wherein the first type terminal device is a reduced functionality (REDCAP) terminal device.

24. 23. The method of claim 22, wherein the identifier information comprises one bit.

25. An information transmission method described in any one of claims 19 to 24, wherein a bit status of the third instruction information is a first bit state or a second bit state, and a bandwidth resource for transmitting the PUCCH when the bit status of the third instruction information is the first bit state is different from a bandwidth resource for transmitting the PUCCH when the bit status of the third instruction information is the second bit state.

26. The information transmission method of claim 22, wherein the higher layer signaling is System Information Block 1 (SIB1).

27. The value of the first parameter is greater than 4, and when M=1, the M bandwidth resources are the first bandwidth resources, and the first bandwidth resources include predefined resources 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 sending first indication information when the value of the first parameter is greater than 4 and M=1, where the first indication information indicates a first random access channel opportunity, a starting resource block of the first bandwidth resource is the same as a starting resource block of the first random access channel opportunity, and the M bandwidth resources are the first bandwidth resources; or the value of the first parameter is greater than 4, and when M>1, each of the M bandwidth resources includes a resource corresponding to at least one random access channel opportunity; 27. Information transmission method according to any one of claims 19 to 26.

28. 28. The method of claim 27, wherein the value of the first parameter is 8, and the indices of the random access channel opportunities sorted in a first order are from 0 to 7, and the first order comprises ascending order of frequency.

29. When the first indication information includes 1 bit, the first indication information indicates an index of the first random access channel opportunity at index {0, 4}; or When the first indication information includes 2 bits, the first indication information indicates an index of the first random access channel opportunity at index {1, 2, 3, 4}; or When the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0, 1, 2, 3, 4}; or When the first indication information includes 3 bits, the first indication information indicates an index of the first random access channel opportunity at index {0, 1, 2, 3, 4, 5, 6, 7}; or When the first indication information is not transmitted, an index of the first random access channel opportunity is 0.

29. The information transmission method according to claim 28.

30. the first information indicating the M bandwidth resources; a size of each of the M bandwidth resources is predefined; or When M=2, one of the bandwidth resources includes resources for random access channel opportunities {0, 1, 2, 3}, and the other of the bandwidth resources includes resources for random access channel opportunities {4, 5, 6, 7}; or transmitting a first signaling when M>1, 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; 30. The information transmission method according to any one of claims 27 to 29.

31. When M>1, the information transmission method further comprises: transmitting second indication information, where the second indication information indicates a second bandwidth resource; receiving a random access preamble on the first bandwidth resource; and receiving, on the second bandwidth resource, a physical uplink control channel for feeding back a message 3 in a random access process or a contention resolution message; 27. The method of transmitting information according to any one of claims 19 to 26, comprising:

32. 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 a random access response message; 32. The information transmission method according to claim 31.

33. The information transmission method further comprises: transmitting fourth indication information, wherein the fourth indication information indicates that an association configuration between the SSB and the random access channel opportunity is a first association configuration or a second association configuration, the association configuration being an association configuration between a number of the SSB and a number of the random access channel opportunity; 20. The information transmission method according to claim 19, comprising:

34. The information transmission method further comprises: When sending fourth indication information, the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is a first association configuration; or when not sending fourth indication information, the association configuration between the SSB and the random access channel opportunity is a second association configuration; or When sending the fourth indication information, the fourth indication information indicates that the association configuration between the SSB and the random access channel opportunity is a second association configuration; or when not sending the fourth indication information, the association configuration between the SSB and the random access channel opportunity is a first association configuration; 20. The information transmission method of claim 19, comprising:

35. 35. The method of claim 19, wherein the first parameter is conveyed in random access channel configuration information.

36. 36. The method of claim 19, wherein the first information comprises system information.

37. A communication device comprising a processor, the processor connected to a memory, the memory configured to store a computer program, the processor configured to execute the computer program stored in the memory, such that the communication device performs the information transmission method according to any one of claims 1 to 18.

38. A communications device comprising a processor, the processor connected to a memory, the memory configured to store a computer program, and the processor configured to execute the computer program stored in the memory, such that the communications device performs an information transmission method described in any one of claims 19 to 36.

39. A communication device comprising a transceiver unit and a processing unit, The transceiver unit is configured to receive first information, the first information indicating M bandwidth resources, M being a positive integer, a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by a first terminal device, the first terminal device being a first type terminal device; The transceiver unit is configured to receive a first parameter, the first parameter being a 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 configured to transmit uplink information or receive downlink information on the first bandwidth resource; The transceiver unit is configured to receive third indication information, the third indication information indicating a bandwidth resource for the first terminal device to transmit a physical uplink control channel (PUCCH) for feeding back a contention resolution message. Communications equipment.

40. A communication device comprising a transceiver unit, comprising: The transceiver unit is configured to transmit first information to a first terminal device, the first information indicating M bandwidth resources, M being a positive integer, a size of each of the M bandwidth resources being equal to or smaller than a maximum channel bandwidth supported by the first terminal device, and the first terminal device being a first type terminal device; The transceiver unit is configured to transmit a first parameter, the first parameter being a number of random access channel opportunities for frequency division multiplexing in a time unit; The transceiver unit is configured to receive uplink information from the first terminal device or transmit downlink information to the first terminal device on a first bandwidth resource, the first bandwidth resource being determined by the first terminal device from the M bandwidth resources based on the first information and the first parameter; The transceiver unit is configured to transmit third indication information, the third indication information indicating a bandwidth resource for the first terminal device to transmit a physical uplink control channel (PUCCH) for feeding back a contention resolution message. Communications equipment.

41. A computer program which, when executed on a computer, enables the computer to carry out an information transmission method according to any one of claims 1 to 18, or enables the computer to carry out an information transmission method according to any one of claims 19 to 36.

42. A chip comprising a processor and a communication interface, the processor configured to perform the information transmission method according to any one of claims 1 to 18 or to read instructions for performing the information transmission method according to any one of claims 19 to 36.

43. A communication device comprising a module adapted to carry out the information transmission method according to any one of claims 1 to 18 or 19 to 36.

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