Communication method, and apparatus

Abstract

Disclosed in the embodiments of the present application are a communication method, and an apparatus. The method comprises: transmitting first information to a network device on a first CC or band, the first information being used for requesting for random access; receiving a first response from the network device, the first response being used for scheduling transmission of second information; and transmitting the second information to the network device on a second CC or band, the second information being a message Msg3, and the first CC or band being different from the second CC or band. The embodiments of present application use different CCs or bands to separately transmit the first information and the second information; the first information is transmitted by using mid-frequency resources with relatively abundant frequency-domain resources, thereby reducing the probability of resource collisions and improving the random access success rate; and the second information is transmitted by using low-frequency resources with good coverage performance, thereby ensuring the coverage performance of subsequent transmission after successful random access.

Description

A communication method and apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411304119.8, filed on September 18, 2024, with the State Intellectual Property Office of China, and the Chinese patent application No. 202411304119.8 has the title of "A communication method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular, to a communication method and apparatus. BACKGROUND

[0003] In the 3rd generation partnership project (3GPP) conference, the concept of multiple band serving cell (MBSC) is proposed, that is, one serving cell can contain multiple non-continuous downlink (DL) band resources and / or multiple uplink (UL) band resources, so that one UE can dynamically switch between multiple DL bands and / or multiple UL bands and flexibly perform transmission. It can also be understood that configuring one cell to contain multiple DL band and / or multiple UL band sets, or one cell to contain multiple UL bands, so that the UE can dynamically switch between the bands contained in the MBSC.

[0004] In the existing random access process, the terminal device sends massage (Msg) 1 to the network device in one band or component carrier (CC), and correspondingly, the terminal device also sends Msg3 to the network device in the same band or CC. However, this will affect the success rate of random access and cannot guarantee the coverage performance of transmission. SUMMARY

[0005] The embodiments of the present application provide a communication method and apparatus, which can improve the success rate of random access and guarantee the coverage performance of transmission.

[0006] In a first aspect, the embodiments of the present application provide a communication method, which can be applied to a terminal side, for example, a terminal device or a communication module in the terminal device, or a circuit or chip responsible for communication function in the terminal device (such as a modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core), taking the case of the application of the method to the terminal device for example, the method comprises:

[0007] sending first information to a network device on a first component carrier (CC) or frequency band (band), the first information being used for requesting random access; receiving a first response from the network device, the first response being used for scheduling transmission of second information; and sending the second information to the network device on a second CC or band, the second information being a message (Msg3), and the first CC or band being different from the second CC or band.

[0008] By using different CCs or bands to respectively send the first information and the second information, the first information is sent by using relatively abundant medium frequency resources in the frequency domain resources, so as to reduce the probability of resource collision and improve the success rate of random access. The second information is sent by using low frequency resources with good coverage performance, so as to guarantee the coverage performance of subsequent transmission after the success of random access.

[0009] In a possible design, the first response comprises first indication information, and the first indication information is used for indicating the second CC or band. By indicating the second CC or band to the terminal device through the first indication information, the terminal device can send the second information on the second CC or band, so that the first information and the second information are transmitted on different CCs or bands.

[0010] In a possible design, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group, where the first preamble sequence group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or a band expected to be used for transmitting the second information. By carrying a preamble sequence in a preamble sequence group in the first information, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. In addition, by carrying a preamble sequence in a preamble sequence group in the first information, it is implicitly indicated that a CC or a band corresponding to the preamble sequence group is expected to be selected to transmit the second information. The network device indicates, to the terminal device, a CC or a band used for transmitting the second information based on the capability information of the terminal device.

[0011] In a possible design, the first CC or band belongs to a first frequency domain resource group, where the first frequency domain resource group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or a band expected to be used for transmitting the second information. By sending the Msg1 using the first CC or band in a certain frequency domain resource group, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. In addition, by sending the Msg1 using the first CC or band in a certain frequency domain resource group, it is implicitly indicated that a CC or a band corresponding to the frequency domain resource group is expected to be selected to transmit the second information. The network device indicates, to the terminal device, a CC or a band used for transmitting the second information based on the capability information of the terminal device.

[0012] In a possible design, configuration information is received from the network device, where the configuration information includes at least one of: a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of preamble sequence groups, and a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of frequency domain resource groups. The configuration information is configured by the network device, so as to ensure that the terminal device has the same configuration information as the network device, and the CC or the band used for transmitting the second information can be correctly indicated.

[0013] In one possible design, the first indication information indicates that the first information and the second information are scheduled on different CCs or bands and / or the CC or band expected to be used for transmission of the second information, by the first preamble sequence group or the first frequency domain resource group, when a number of times of transmitting the first information on the first CC or band exceeds a first threshold. The first threshold is configured such that the terminal device reports capability information to the network device when it is aware that coverage performance of the preamble cannot be sufficiently guaranteed, so as to use a band or CC with better coverage performance for transmission of Msg 3 in the next time.

[0014] In one possible design, the first threshold is configured for the network device.

[0015] In one possible design, the second CC or band includes M uplink frequency domain resources from N uplink frequency domain resources of a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N. The second CC or band is different from the first CC or band by selecting uplink frequency domain resources from the N uplink frequency domain resources, for example, medium frequency resources with a relatively rich number of frequency domain resources are selected for transmission of the first information, so as to reduce the probability of resource collision and improve the success rate of random access. Low frequency resources with better coverage performance are selected for transmission of the second information, so as to guarantee the coverage performance for subsequent transmission after successful random access.

[0016] In one possible design, the first indication information includes a plurality of bits, and values of the plurality of bits are used to indicate the second CC or band from the N uplink frequency domain resources. The second CC or band is indicated by values of the plurality of bits, so as to reduce signaling overhead.

[0017] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a network side, for example, a network device or a communication module in the network device, or a circuit or chip responsible for communication function in the network device. Taking the case that the method is applied to the network device, the method includes:

[0018] receiving, at a first component carrier (CC) or frequency band (band), first information from a terminal device, the first information being used to request random access; sending, to the terminal device, a first response, the first response being used to schedule transmission of second information; and receiving, at a second CC or band, the second information from the terminal device, the second information being a message (Msg 3), and the first CC or band being different from the second CC or band.

[0019] By using different CCs or bands to respectively transmit the first information and the second information, the first information is transmitted using mid-frequency resources which are relatively more abundant in frequency domain resources, thereby reducing the probability of resource collision and improving the success rate of random access. The second information is transmitted using low-frequency resources which have better coverage performance, thereby guaranteeing the coverage performance of subsequent transmission after successful random access.

[0020] In a possible design, the first response includes first indication information, where the first indication information is used to indicate the second CC or band. The first indication information is used to indicate the second CC or band to the terminal device, so that the terminal device can transmit the second information on the second CC or band, and the first information and the second information are transmitted on different CCs or bands.

[0021] In a possible design, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group. According to the first preamble sequence group, it is determined that the terminal device supports transmission of the first information and the second information on different CCs or bands, and / or expects to use a CC or band for transmission of the second information. By carrying a preamble sequence in a preamble sequence group in the first information, it is implicitly indicated that transmission of the first information and the second information on different CCs or bands is supported. Furthermore, by carrying a preamble sequence in a certain preamble sequence group in the first information, it is implicitly indicated that a CC or band corresponding to the preamble sequence group is expected to be selected for transmission of the second information. This enables the network device to indicate, based on the capability information of the terminal device, a CC or band used for transmission of the second information to the terminal device.

[0022] In a possible design, the first CC or band belongs to a first frequency domain resource group, and according to the first frequency domain resource group, it is determined that the terminal device supports transmission of the first information and the second information on different CCs or bands, and / or expects to use a CC or band for transmission of the second information. By using a first CC or band in a certain frequency domain resource group to transmit Msg1, it is implicitly indicated that transmission of the first information and the second information on different CCs or bands is supported. Furthermore, by using a first CC or band in a certain frequency domain resource group to transmit Msg1, it is implicitly indicated that a CC or band corresponding to the frequency domain resource group is expected to be selected for transmission of the second information. This enables the network device to indicate, based on the capability information of the terminal device, a CC or band used for transmission of the second information to the terminal device.

[0023] In a possible design, configuration information is sent to the terminal device, and the configuration information includes at least one of the following: a correspondence between a plurality of CCs or bands and a plurality of preamble sequence groups that can be used to transmit the second information, and a correspondence between a plurality of CCs or bands and a plurality of frequency domain resource groups that can be used to transmit the second information. The configuration information sent by the network device is used for configuration, so that the configuration information of the terminal device and the network device is the same, and the accuracy of the indicated CC or band used for the second information can be ensured.

[0024] In a possible design, when the number of times that the terminal device sends the first information on the first CC or band exceeds a first threshold, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are scheduled on different CCs or bands, and / or the expected CC or band used to transmit the second information. The first threshold is configured, so that the terminal device reports capability information to the network device when it is realized that the coverage performance of the preamble cannot be sufficiently ensured, so that a band or CC with better coverage performance is used for transmitting Msg 3 in the next time.

[0025] In a possible design, the first threshold is configured by the network device for the terminal device.

[0026] In a possible design, the second CC or band is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, the N is an integer greater than or equal to 3, and the M is an integer less than or equal to N. The second CC or band is different from the first CC or band by selecting the uplink frequency domain resources in the N uplink frequency domain resources included in the cell as the second CC or band, for example, the middle frequency resources are selected as the frequency domain resources for transmitting the first information, so as to reduce the probability of resource collision and improve the success rate of random access. The low frequency resources with better coverage performance are selected as the frequency domain resources for transmitting the second information, so as to ensure the coverage performance of subsequent transmission after the random access is successful.

[0027] In a possible design, the first indication information includes a plurality of bits, and values corresponding to the plurality of bits are used to indicate the second CC or band in the N uplink frequency domain resources. The second CC or band is indicated by the values corresponding to the plurality of bits, so that the signaling overhead can be reduced.

[0028] In a third aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal side, for example, a terminal device or a communication module in the terminal device, or a circuit or chip responsible for a communication function in the terminal device. Taking the case that the method is applied to the terminal device, the method includes the following steps.

[0029] sending first information to a network device, the first information being used for requesting random access; receiving a first response from the network device, the first response comprising first indication information, the first indication information being used for indicating a component carrier (CC) or a frequency band (band) used for transmitting second information, the second information being a message (Msg3).

[0030] By indicating the CC or the band used for transmitting the second information through the first indication information, the terminal device can transmit the second information to the network device on a CC or a band different from that used for transmitting the first information. Thus, the probability of resource collision is reduced and the success rate of random access is improved by using mid-frequency resources with relatively rich frequency domain resources when transmitting the first information. The coverage performance of subsequent transmission after successful random access is guaranteed by using low-frequency resources with better coverage performance when transmitting the second information.

[0031] In a possible design, the CC or the band used for transmitting the first information is different from the CC or the band used for transmitting the second information. For example, mid-frequency resources with relatively rich frequency domain resources are used for transmitting the first information, thereby reducing the probability of resource collision and improving the success rate of random access. Low-frequency resources with better coverage performance are used for transmitting the second information, thereby guaranteeing the coverage performance of subsequent transmission after successful random access.

[0032] In a possible design, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group. The first preamble sequence group is used for indicating that the first information and the second information are scheduled and / or transmitted on different CCs or bands, and / or indicating a CC or a band expected to be used for transmitting the second information. By carrying a preamble sequence in the first information, the preamble sequence group is implicitly indicated to support the first information and the second information to be transmitted on different CCs or bands. Furthermore, by carrying a preamble sequence in the first information, the preamble sequence group is implicitly indicated to expect to select the CC or the band corresponding to the preamble sequence group to transmit the second information. Thus, the network device indicates the CC or the band used for transmitting the second information to the terminal device based on the capability information of the terminal device.

[0033] In one possible design, the CC or band used by the first information belongs to a first frequency domain resource group, and the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled and / or transmitted on different CCs or bands and / or the CC or band expected to be used to transmit the second information. By sending the Msg 1 using the first CC or band in a certain frequency domain resource group, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. Also, by sending the Msg 1 using the first CC or band in a certain frequency domain resource group, it is implicitly indicated that the CC or band corresponding to the frequency domain resource group is expected to be selected to transmit the second information. This enables the network device to indicate, based on the capability information of the terminal device, the CC or band used to transmit the second information to the terminal device.

[0034] In one possible design, the configuration information from the network device includes at least one of the following: a correspondence between a plurality of CCs or bands that can be used by the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands that can be used by the second information and a plurality of frequency domain resource groups. The configuration information from the network device is used to configure the terminal device, so that the terminal device and the network device have the same configuration information, and the CC or band used to transmit the second information can be correctly indicated.

[0035] In one possible design, when the number of times of sending the first information on the same CC or band exceeds a first threshold, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled and / or transmitted on different CCs or bands and / or the CC or band expected to be used to transmit the second information. The first threshold is configured, so that the terminal device reports the capability information to the network device when it is realized that the coverage performance of the preamble cannot be sufficiently guaranteed, so as to use a band or a CC with better coverage performance to transmit the Msg 3 in the next transmission.

[0036] In one possible design, the first threshold is configured by the network device.

[0037] In a possible design, the CC or band used by the second information is M uplink frequency domain resources from N uplink frequency domain resources included in a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N. By selecting the CC or band used by the second information from the N uplink frequency domain resources included in the cell, the second CC or band is different from the first CC or band, for example, the middle frequency resource is selected for transmission of the first information, so as to reduce the probability of resource collision and improve the success rate of random access. The low frequency resource with good coverage performance is selected for transmission of the second information, so as to guarantee the coverage performance of subsequent transmission after successful random access.

[0038] In a possible design, the first indication information includes a plurality of bits, and values corresponding to the plurality of bits are used to indicate the CC or band used by the second information from the N uplink frequency domain resources. By using values corresponding to the plurality of bits to indicate the CC or band used by the second information, the signaling overhead can be reduced.

[0039] In a fourth aspect, an embodiment of the present application provides a communication method, which can be applied to a network side, for example, a network device or a communication module in the network device, or a circuit or chip responsible for communication function in the network device. Taking the case where the method is applied to the network device, the method includes:

[0040] receiving first information from a terminal device, where the first information is used to request random access; and sending a first response to the terminal device, where the first response includes first indication information, and the first indication information is used to indicate a member carrier (CC) or a frequency band (band) used for transmission of second information, and the second information is a message (Msg3).

[0041] By using the first indication information to indicate the CC or band used for transmission of the second information, the terminal device can send the second information to the network device on a CC or band different from that used for transmission of the first information. Therefore, the middle frequency resource is used for transmission of the first information, so as to reduce the probability of resource collision and improve the success rate of random access. The low frequency resource with good coverage performance is used for transmission of the second information, so as to guarantee the coverage performance of subsequent transmission after successful random access.

[0042] In a possible design, the CC or band used by the first information is different from the CC or band used by the second information. For example, the middle frequency resource is used for transmission of the first information, so as to reduce the probability of resource collision and improve the success rate of random access. The low frequency resource with good coverage performance is used for transmission of the second information, so as to guarantee the coverage performance of subsequent transmission after successful random access.

[0043] In a possible design, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group, and according to the first preamble sequence group, it is determined that the terminal device supports scheduling and / or transmission of the first information and the second information on different CCs or bands and / or expects to use a CC or a band for transmission of the second information. By carrying a preamble sequence in a preamble sequence group in the first information, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. Moreover, by carrying a preamble sequence in a preamble sequence group in the first information, it is implicitly indicated that the second information is expected to be transmitted on a CC or a band corresponding to the preamble sequence group. This enables the network device to indicate, based on the capability information of the terminal device, the CC or the band used for transmission of the second information to the terminal device.

[0044] In a possible design, the first information uses a CC or a band that belongs to a first frequency domain resource group, and according to the first frequency domain resource group, it is determined that the terminal device supports scheduling and / or transmission of the first information and the second information on different CCs or bands and / or expects to use a CC or a band for transmission of the second information. By sending Msg1 using a first CC or a band in a certain frequency domain resource group, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. Moreover, by sending Msg1 using a first CC or a band in a certain frequency domain resource group, it is implicitly indicated that the second information is expected to be transmitted on a CC or a band corresponding to the frequency domain resource group. This enables the network device to indicate, based on the capability information of the terminal device, the CC or the band used for transmission of the second information to the terminal device.

[0045] In a possible design, configuration information is sent to the terminal device, and the configuration information includes at least one of the following: a correspondence between a plurality of CCs or bands that can be used by the second information and a plurality of preamble sequence groups, and a correspondence between a plurality of CCs or bands that can be used by the second information and a plurality of frequency domain resource groups. By configuring through the configuration information sent by the network device, it is ensured that the terminal device has the same configuration information as the network device, so that the CC or the band used for the second information can be correctly indicated.

[0046] In one possible design, the first preamble sequence group or the first frequency domain resource group indicates support for the first information and the second information to be scheduled on different CCs or bands and / or the CCs or bands expected to be used for transmission of the second information when the number of times of transmitting the first information on the same CC or band exceeds a first threshold. The first threshold is configured such that the terminal device reports capability information to the network device when it realizes that coverage performance of the preamble cannot be sufficiently guaranteed, so as to use a band or a CC with better coverage performance for transmission of Msg 3 in the next transmission.

[0047] In one possible design, the first threshold is configured by the network device for the terminal device.

[0048] In one possible design, the CC or band used by the second information is M out of N uplink frequency domain resources included in a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N. By selecting the CC or band used by the second information from the N uplink frequency domain resources included in the cell, the second CC or band is different from the first CC or band, e.g., a middle frequency resource is selected for transmission of the first information, thereby reducing the probability of resource collision and improving the success rate of random access. A low frequency resource with better coverage performance is selected for transmission of the second information, thereby guaranteeing coverage performance for subsequent transmission after successful random access.

[0049] In one possible design, the first indication information includes multiple bits, and values of the multiple bits are used to indicate the CC or band used by the second information out of the N uplink frequency domain resources. By using values of the multiple bits to indicate the CC or band used by the second information, signaling overhead can be reduced.

[0050] In a fifth aspect, an embodiment of the present application provides a communication apparatus, which has the function of implementing the first aspect, e.g., the communication apparatus includes a module or unit or means corresponding to the operation of the first aspect, which can be implemented by software, or by hardware, or by a combination of software and hardware. The apparatus includes:

[0051] a sending module, configured to send first information to a network device on a first component carrier (CC) or frequency band (band), where the first information is used to request random access;

[0052] a receiving module, configured to receive a first response from the network device, where the first response is used to schedule transmission of second information;

[0053] The sending module is configured to send the second information to the network device on a second CC or band, the second information being a message Msg3, and the first CC or band being different from the second CC or band.

[0054] In a possible design of the method, the first response includes first indication information, and the first indication information is used to indicate the second CC or band.

[0055] In a possible design of the method, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group, and the first preamble sequence group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or band expected to be used for transmitting the second information.

[0056] In a possible design of the method, the first CC or band belongs to a first frequency domain resource group, and the first frequency domain resource group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or band expected to be used for transmitting the second information.

[0057] In a possible design of the method, the receiving module is further configured to receive configuration information from the network device, and the configuration information includes at least one of the following: a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands capable of being used for transmitting the second information and a plurality of frequency domain resource groups.

[0058] In a possible design of the method, when a number of times of sending the first information on the first CC or band exceeds a first threshold, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled on different CCs or bands, and / or a CC or band expected to be used for transmitting the second information.

[0059] In a possible design of the method, the first threshold is configured by the network device.

[0060] In a possible design of the method, the second CC or band is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, the N is an integer greater than or equal to 3, and the M is an integer less than or equal to N.

[0061] In a possible design of the method, the first indication information includes a plurality of bits, and values corresponding to the plurality of bits are used to indicate the second CC or band in the N uplink frequency domain resources.

[0062] The operations and advantages of the communication device can refer to the method and advantages of the first aspect, and the repeated parts will not be described here.

[0063] In a sixth aspect, the embodiments of the present application provide a communication device, which has the functions of the second aspect, for example, the communication device includes a module or unit or means corresponding to the operations of the second aspect, which can be implemented by software, or by hardware, or by a combination of software and hardware. The device includes:

[0064] The receiving module is configured to receive first information from a terminal device on a first component carrier (CC) or frequency band (band), wherein the first information is used to request random access.

[0065] The sending module is configured to send a first response to the terminal device, wherein the first response is used to schedule transmission of second information.

[0066] The receiving module is further configured to receive the second information from the terminal device on a second CC or band, wherein the second information is a message (Msg3), and the first CC or band is different from the second CC or band.

[0067] In a possible design, the first response includes first indication information, and the first indication information is used to indicate the second CC or band.

[0068] In a possible design, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group.

[0069] The processing module is configured to determine, according to the first preamble sequence group, that the terminal device supports transmission of the first information and the second information on different CCs or bands, and / or that a CC or band expected to be used for transmission of the second information.

[0070] In a possible design, the first CC or band belongs to a first frequency domain resource group.

[0071] The processing module is configured to determine, according to the first frequency domain resource group, that the terminal device supports transmission of the first information and the second information on different CCs or bands, and / or that a CC or band expected to be used for transmission of the second information.

[0072] In a possible design, the sending module 1003 is further configured to send configuration information to the terminal device, where the configuration information includes at least one of the following: a correspondence between a plurality of CCs or bands and a plurality of preamble sequence groups that can be used for transmitting the second information, and a correspondence between a plurality of CCs or bands and a pluralityity of frequency domain resource groups that can be used for transmitting the second information.

[0073] In a possible design, when the terminal device sends the first information on the first CC or band more than a first threshold number of times, the first preamble sequence group or the first frequency domain resource group indicates that the first information and the second information are supported to be scheduled on different CCs or bands, and / or that a CC or band expected to be used for transmitting the second information.

[0074] In a possible design, the first threshold is configured by the network device to the terminal device.

[0075] In a possible design, the second CC or band includes M uplink frequency domain resources from N uplink frequency domain resources of a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N.

[0076] The operations and advantages of the communication apparatus can be refer to the method and advantages of the second aspect, and details are not repeated.

[0077] In a seventh aspect, an embodiment of the present application provides a communication apparatus, which has the functions of the third aspect, for example, the communication apparatus includes a module or unit or means corresponding to the operations of the third aspect, which can be implemented by software, or by hardware, or by a combination of software and hardware. The apparatus includes:

[0078] a sending module configured to send first information to a network device, where the first information is used to request random access;

[0079] a receiving module configured to receive first response from the network device, where the first response includes first indication information, and the first indication information is used to indicate a member carrier (CC) or a frequency band (band) used for transmitting second information, and the second information is a message (Msg3).

[0080] In a possible design, the CC or band used by the first information is different from the CC or band used by the second information.

[0081] In one possible design, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group, where the first preamble sequence group is used to indicate that the first information and the second information are scheduled on different CCs or bands and / or the CC or band expected to be used for transmitting the second information.

[0082] In one possible design, the CC or band used by the first information belongs to a first frequency domain resource group, where the first frequency domain resource group is used to indicate that the first information and the second information are scheduled on different CCs or bands and / or the CC or band expected to be used for transmitting the second information.

[0083] In one possible design, the receiving module is further configured to receive configuration information from the network device, where the configuration information includes at least one of the following: a correspondence between a plurality of CCs or bands that can be used by the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands that can be used by the second information and a plurality of frequency domain resource groups.

[0084] In one possible design, when a number of times of transmitting the first information on a same CC or band exceeds a first threshold, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are scheduled on different CCs or bands and / or the CC or band expected to be used for transmitting the second information.

[0085] In one possible design, the first threshold is configured by the network device.

[0086] In one possible design, the CC or band used by the second information is M out of N uplink frequency domain resources included in a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N.

[0087] In one possible design, the first indication information includes a plurality of bits, and values of the plurality of bits are used to indicate the CC or band used by the second information out of the N uplink frequency domain resources.

[0088] The operations and benefits of the communication apparatus can be the same as those of the method described in the third aspect above. Details are not repeated here.

[0089] In an eighth aspect, an embodiment of the present application provides a communication apparatus, which has the function of the fourth aspect, for example, the communication apparatus includes a module or unit or means corresponding to the operation of the fourth aspect, which can be implemented by software, or by hardware, or by a combination of software and hardware. The apparatus includes:

[0090] a receiving module, configured to receive first information from a terminal device, the first information being used for requesting random access;

[0091] a sending module, configured to send first response to the terminal device, the first response including first indication information, the first indication information being used for indicating a component carrier (CC) or a frequency band (band) used for transmitting second information, the second information being a message (Msg3).

[0092] In a possible design of the present application, the CC or the band used by the first information is different from the CC or the band used by the second information.

[0093] In a possible design of the present application, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group.

[0094] a processing module, configured to determine, according to the first preamble sequence group, that the terminal device supports scheduling of the first information and the second information on different CCs or bands and / or that the terminal device expects a CC or a band used for transmitting the second information.

[0095] In a possible design of the present application, the CC or the band used by the first information belongs to a first frequency domain resource group.

[0096] a processing module, configured to determine, according to the first frequency domain resource group, that the terminal device supports scheduling of the first information and the second information on different CCs or bands and / or that the terminal device expects a CC or a band used for transmitting the second information.

[0097] In a possible design of the present application, the sending module 1003 is further configured to send configuration information to the terminal device, the configuration information including at least one of the following: a correspondence between a plurality of CCs or bands available for the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands available for the second information and a plurality of frequency domain resource groups.

[0098] In one possible design, the first indication information indicates that the first information and the second information are scheduled and / or transmitted on different CCs or bands and / or the CCs or bands expected to be used for transmitting the second information, when the number of times of transmitting the first information on the same CC or band exceeds a first threshold.

[0099] In one possible design, the first threshold is configured by the network device to the terminal device.

[0100] In one possible design, the CCs or bands used by the second information are M uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N.

[0101] In one possible design, the first indication information includes a plurality of bits, and values of the plurality of bits are used to indicate the CCs or bands used by the second information in the N uplink frequency domain resources.

[0102] The operations and advantages of the communication apparatus can be the same as those of the method described in the fourth aspect above, and thus repeated details are omitted.

[0103] In a ninth aspect, an embodiment of the present application provides a communication apparatus, which includes a memory and one or more processors. The memory is used to store part or all of the computer programs or instructions necessary for implementing the functions related to the first aspect and the third aspect. The one or more processors can execute the computer programs or instructions, and when the computer programs or instructions are executed, the communication apparatus implements the method in any possible design or implementation manner of the first aspect.

[0104] In one possible design, the communication apparatus can further include an interface circuit, where the processor is configured to communicate with other apparatuses or components through the interface circuit.

[0105] In one possible design, the communication apparatus can further include the memory.

[0106] The communication apparatus can be a terminal device, a communication module in a terminal device, or a chip responsible for communication functions such as a modem chip (also referred to as a baseband chip) or a SoC or SIP chip including a modem module.

[0107] In a tenth aspect, an embodiment of the present application provides a communication apparatus, which comprises a memory and one or more processors. The memory is configured to store part or all of the computer programs or instructions necessary for implementing the functions related to the second aspect and the fourth aspect. The one or more processors are configured to execute the computer programs or instructions, and when the computer programs or instructions are executed, the communication apparatus is caused to implement the method in any possible design or implementation manner of the second aspect and the fourth aspect.

[0108] In a possible design, the communication apparatus can further comprise interface circuitry, and the processor is configured to communicate with other apparatuses or components via the interface circuitry.

[0109] In a possible design, the communication apparatus can further comprise the memory.

[0110] The communication apparatus can be a network device, or a communication module in a network device, or a chip responsible for communication functions in a network device, such as a modem chip (also referred to as a baseband chip) or an SoC or SIP chip comprising a modem module.

[0111] In an eleventh aspect, a computer readable storage medium is provided, which is configured to store a computer program. When the computer program is executed, the method in any one of the first aspect to the fourth aspect is implemented.

[0112] In a twelfth aspect, a computer program product is provided, which comprises a computer program. When the computer program is executed, the method in any one of the first aspect to the fourth aspect is implemented.

[0113] In a thirteenth aspect, an embodiment of the present application provides a communication system, which comprises a terminal device and a network device. The terminal device is configured to perform the steps in the first aspect and the third aspect, and the network device is configured to perform the steps in the second aspect and the fourth aspect.

[0114] In a fourteenth aspect, a chip is provided, which comprises a processor and a communication interface. The communication interface is configured to communicate with external devices or internal devices. The processor is configured to implement the method in the various aspects.

[0115] In a possible design, the chip can further comprise a memory. The memory stores computer programs or instructions, and the processor is configured to execute the computer programs or instructions stored in the memory or other programs or instructions. When the computer programs or instructions are executed, the processor is configured to implement the method in the various aspects.

[0116] In a possible design, the chip can be integrated in a terminal device or a network device. BRIEF DESCRIPTION OF DRAWINGS

[0117] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0118] FIG. 2 is a schematic diagram of a multi-band serving cell (MBSC);

[0119] FIG. 3 is a schematic diagram of channel / signal mapping;

[0120] FIG. 4 is a schematic diagram of a procedure of contention-based random access;

[0121] FIG. 5 is a schematic diagram of a procedure of non-contention-based random access;

[0122] FIG. 6 is a schematic diagram of a frame structure of RAR;

[0123] FIG. 7 is a schematic diagram of a procedure of a communication method according to an embodiment of the present application;

[0124] FIG. 8 is a schematic diagram of a procedure of another communication method according to an embodiment of the present application;

[0125] FIG. 9 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0126] FIG. 10 is a schematic diagram of a structure of another communication apparatus according to an embodiment of the present application;

[0127] FIG. 11 is a schematic diagram of a structure of a terminal device according to an embodiment of the present application;

[0128] FIG. 12 is a schematic diagram of a structure of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0129] As shown in FIG. 1, FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application. The communication system can include one or more network devices and one or more terminal devices. The terminal device is located in a coverage of one or more cells (carriers) provided by the network device. The cell serving the terminal device can be one or more, and at least one cell provides radio resources for the terminal device.

[0130] The technical solutions in the embodiments of the present application can be applied to various communication systems, such as a universal mobile telecommunications system (UMTS), a wireless local area network (WLAN), a wireless fidelity (Wi-Fi) system, a 4th generation (4G) mobile communication system such as a long term evolution (LTE) system, a 5th generation (5G) mobile communication system such as a new radio (NR) system, and a future evolved communication system such as a 6th generation (6G) mobile communication system.

[0131] The network device can be a device or module with corresponding communication functions located at the network side of the above communication system. The network device is usually provided with a communication module, circuit or chip for performing corresponding communication functions. The network device is also configured with program instructions for performing corresponding communication functions and corresponding program instructions. The network device refers to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network, which can also be referred to as a base station. At present, some examples of RAN nodes are: a new radio base station (new radio eNB), a continuously evolved node B (gNB), a transmission reception point (TRP), an evolved node B (eNB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a Home eNodeB or a Home NodeB, HNB), a baseband unit (BBU), or a wireless fidelity (Wi-Fi) access point (AP) and the like.

[0132] The terminal device can be a device or module with corresponding communication function for accessing the above-mentioned communication system. The terminal device is usually provided with a communication module, circuit or chip for performing corresponding communication function. The terminal device is also configured with program instructions for performing corresponding communication function. The terminal, also known as user equipment (UE), mobile station (MS), mobile terminal (MT) and the like, refers to a device that provides voice and / or data connectivity for a user. For example, handheld device with wireless connection function, vehicle-mounted device, etc. At present, some examples of terminals are: mobile phone, tablet computer, notebook computer, palm computer, mobile Internet device, wearable device, virtual reality (VR) device, augmented reality (AR) device, and wireless terminal in industrial control, unmanned driving, remote surgery, smart grid, transportation safety, smart city, smart home, etc.

[0133] The following describes the terminal device as UE and the network device as base station.

[0134] As shown in FIG. 2, FIG. 2 is a schematic diagram of a multi-band sharing one service cell (MBSC). On the frequency domain resource of 0-100 MHz, there are multiple non-continuous band resources, and one service cell can include multiple non-continuous downlink band resources and / or multiple uplink band resources. For example, for cell 1, it can include one or more of the non-continuous 3 uplink band resources (frequency division duplexing (FDD) 900 MHz, FDD 1800 MHz and FDD 2100 MHz) and one or more of the non-continuous 3 uplink band resources (FDD 900 MHz, FDD 1800 MHz and FDD 2100 MHz).

[0135] In the existing FDD system, one cell contains one DL component carrier (CC) and one UL CC. In the existing time division duplexing (TDD) system, one cell contains one TDD CC. In the existing supplementary UL (SUL) system, one cell contains one DL CC and one normal UL (NUL) CC and one SUL CC. In the future 6G, multiple bands are expected to be flexibly mapped as a whole band. That is, one serving cell can include multiple DL CCs and multiple UL CCs. For example, it can include one DL CC and one normal UL (NUL) CC and N SUL CCs, N being an integer greater than 1. The NUL CC can be a frequency point high, poor coverage performance frequency domain resource, and the SUL CC can be a frequency point low, good coverage performance frequency domain resource.

[0136] As shown in FIG. 3, FIG. 3 is a schematic diagram of channel / signal mapping. Specifically, different channels / signals can be mapped to different bands. Dynamic switching can be performed on the uplink physical shared channel (PUSCH) or the sounding reference signal (SRS), for example, the PUSCH or the SRS can be mapped to band 3, or the PUSCH or the SRS can be mapped to other bands. Switching can be performed on the physical uplink control channel (PUCCH) cell, for example, the PUCCH can be mapped to band 1, or the PUCCH can be mapped to other bands. Flexible mapping of random access (RA) Msg can also be performed, and the mapping of the random access Msg has not been considered in the standard.

[0137] The following describes the random access (RA) process. There are two mechanisms for terminal device random access, including contention-based random access and non-contention-based random access.

[0138] As shown in FIG. 4, FIG. 4 is a flowchart of contention-based random access. It mainly includes the following steps:

[0139] S401, the UE sends an RA preamble (Msg1) to the base station (gNodeB).

[0140] The role of the UE sending the RA preamble is to make the gNodeB aware of the UE random access request, and to estimate the uplink time difference according to the reception of the RA preamble.

[0141] S402, the gNodeB sends a random access response (RAR) (Msg2).

[0142] Specifically, after the gNodeB receives the RA preamble of the UE, the uplink timing advance (TA) of the UE is obtained according to the RA preamble. Then, the gNodeB sends the RAR to the UE through Msg2 on the physical downlink shared channel (PDSCH) channel (the PDSCH can carry the RAR of multiple UEs at the same time), indicating that the gNodeB has received the RA preamble.

[0143] The RA response carries the value of the TA, and after the UE receives the RAR, the transmission time of the UE is adjusted based on the value of the TA. The RAR can also carry an uplink grant (UL grant), wherein the uplink grant includes the time division multiple access (TDMA) of Msg3, which is used to indicate the time required for the UE to receive the RA response to send Msg3. If the time is less than the minimum scheduling delay of Msg3, the UE cannot successfully send Msg3.

[0144] S403, the UE sends Msg3.

[0145] After S402, the UE obtains uplink synchronization and can transmit messages on a predetermined physical uplink shared channel (PUSCH). The unique identifier (ID) of the UE is carried in Msg3, which is used for contention resolution in S404 to distinguish UEs with transmission conflicts. If the UE has been connected to a certain cell before, the cell radio network temporary identifier (C-RNTI) of the cell is used as the ID, which is a unique UE ID in a specific cell; otherwise, the UE uses an identifier from the core network.

[0146] S404, the gNodeB sends a contention resolution message (Msg4) to the UE.

[0147] After UE sends Msg3, it starts a contention resolution timer (the duration of the contention resolution timer is 64ms), and then monitors the physical downlink control channel (PDCCH) within the time window of the timer. gNodeB assists UE in contention resolution by using C-RNTI on PDCCH or using UE contention resolution identity on PDSCH.

[0148] Before the expiration of the contention resolution timer, UE monitors the PDCCH channel all the time. If any of the following conditions exists, UE considers the contention resolution successful (i.e. the UE successfully accesses), and stops the contention resolution timer, otherwise the timer is not stopped.

[0149] (a) UE monitors the C-RNTI of the UE on PDCCH through Msg4. At this time, UE stops the contention resolution timer, and discards the temporary C-RNTI.

[0150] (b) UE monitors the temporary C-RNTI of the UE on PDCCH through Msg4, and the UE contention resolution identity contained in the medium access control (MAC) protocol data unit (PDU) received by the UE from PDSCH is the same as the UE contention resolution identity carried in Msg3 sent by the UE (i.e. the MAC PDU decoding is successful). At this time, UE stops the contention resolution timer, and sets the temporary C-RNTI as C-RNTI.

[0151] If the contention resolution timer expires, UE discards the temporary C-RNTI, and considers the contention resolution failure. After the contention resolution failure, if the number of RA attempts of the UE is less than the maximum number of attempts, the UE re-performs a RA attempt, otherwise the RA procedure fails.

[0152] As shown in FIG. 5, FIG. 5 is a flowchart of a non-contention-based random access procedure. It mainly includes the following steps:

[0153] S501, gNodeB allocates a RA preamble for the UE.

[0154] When the gNodeB allocates the RA preamble to the UE, the UE is indicated the synchronization signal block (SSB), specifically, there are two indication ways of PDCCH and RRC signaling.

[0155] S502, the UE sends the RA preamble (Msg1).

[0156] The UE obtains the physical random access channel (PRACH) configuration from the system information block 1 (SIB1) message. The UE obtains the time-frequency domain position of the RA preamble from the PRACH configuration.

[0157] S503, the gNodeB sends the RAR (Msg2).

[0158] The RAR can carry timing alignment information and uplink grant (UL grant).

[0159] After the UE sends the RA preamble, the UE continuously monitors the PDCCH in the RA sliding window until the required RA response is obtained.

[0160] If the UE receives the response information in the RA sliding window, the UE considers that the RA response is successfully received, and performs S504.

[0161] If the UE has not received the response information in the RA sliding window, the UE considers that the RA response is failed. At this time, if the number of RA attempts of the UE is less than the maximum number of attempts, the UE re-performs the RA attempt once, otherwise the RA procedure fails.

[0162] S504, the UE sends Msg3.

[0163] The UE sends Msg3 to the gNodeB at a determined sending time based on the timing alignment information.

[0164] As shown in FIG. 6, FIG. 6 is a schematic diagram of a frame structure of a RAR. The RAR can include a backoff index (BI) field, a random access preamble identifier (RAPID) field, and an uplink grant (UL grant) field, etc. As shown in Table 1, Table 1 is a table of contents of the UL grant field. The UL grant field can include a frequency hopping flag field, a PUSCH frequency resource allocation field, a PUSCH time resource allocation field, a modulation and coding scheme (MCS) field, a transmit power control (TPC) command for PUSCH field, a channel state information request field, etc. The PUSCH frequency resource allocation is allocation information of physical resource blocks (PRBs). As can be seen, there is no indication of CC or band in the RAR.

[0165] Table 1

[0166] In the contention-based random access procedure, there is a collision conflict in Msg 1, and more random access channel (RACH) occasions should be configured as much as possible to minimize the collision probability. Since more resources are consumed, the RACH occasions can be configured on the intermediate frequency with relatively abundant resources. In particular, when the UE does not receive the RAR after sending the preamble, power ramping is required n times. The initial transmission of the RACH itself is also power-controlled, and the power is greater after power ramping n times. Msg3 is transmitted on the PUSCH, and power control is performed according to the PUSCH. If the transmission is unsuccessful, the UE needs to be replied with a negative acknowledgement (NACK) to indicate the UE to retransmit. Therefore, when the preamble transmission can be successfully detected, for the UE that successfully accesses, in order to ensure the coverage performance of the subsequent transmission, it is expected to be configured on the low frequency with good coverage performance. That is, Msg1 and Msg3 are expected to be transmitted on different CCs or bands.

[0167] In addition, whether the UE supports transmitting Msg1 and Msg 3 on different CCs or bands needs to be reported by the UE. However, when the UE initially accesses, the UE is in an idle state and cannot directly report the capability information. In addition, the RAR grant currently does not support SUL / NUL switching, and therefore how to indicate the CC or band used for transmitting Msg 3 is also a problem to be solved.

[0168] To solve the above technical problems, the embodiments of the present application provide the following solutions.

[0169] As shown in FIG. 7, FIG. 7 is a flowchart of a communication method provided by the embodiments of the present application. The method mainly includes the following steps:

[0170] S701, the terminal device sends first information to the network device on a first member carrier (CC) or band, and the first information is used to request random access.

[0171] The first information can be Msg1. Since Msg1 has collision conflicts, more RACH occasions should be configured as much as possible to minimize the collision probability. Since more resources are consumed, the first CC or band can be a medium frequency resource which is relatively rich in frequency domain resources.

[0172] The first CC or band is K uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, N is an integer greater than or equal to 3, and K is an integer less than or equal to N. The N uplink frequency domain resources can include one NUL band or CC and multiple SUL bands or CCs. The first CC or band can be a NUL CC or NUL band, or the first CC or band can also be a SUL CC or SUL band. The NUL CC or NUL band can be a frequency domain resource with high frequency points and poor coverage performance, and the SUL CC or SUL band can be a frequency domain resource with low frequency points and good coverage performance. Alternatively, the NUL band and the SUL band can not be distinguished, and both represent any one of the N uplink frequency domain resources.

[0173] When the terminal device initially accesses, the terminal device is in an idle state and cannot directly report the capability information of the terminal device. The capability information can include whether the first information and the second information are supported to be transmitted on different CCs or bands, and / or the expected CC or band used for transmitting the second information. The terminal device can implicitly report the capability information of the terminal device in the following two ways.

[0174] In a first optional mode, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group, and the first preamble sequence group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or a band expected to be used for transmitting the second information. After receiving the first information, the network device can determine, according to the first preamble sequence group, that the terminal device supports the first information and the second information to be transmitted on different CCs or bands, and / or a CC or a band expected to be used for transmitting the second information. The second information is Msg3.

[0175] By carrying a preamble sequence in the preamble sequence group in the first information, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. Moreover, by carrying a preamble sequence in a certain preamble sequence group in the first information, it is implicitly indicated that a CC or a band corresponding to the preamble sequence group is expected to be selected to transmit the second information. So that the network device indicates, based on the capability information of the terminal device, a CC or a band used for transmitting the second information to the terminal device.

[0176] Specifically, the terminal device can configure a correspondence between a plurality of CCs or bands that can be used to transmit the second information and a plurality of preamble sequence groupings. Correspondingly, the network device also configures a correspondence between a plurality of CCs or bands that can be used to transmit the second information and a plurality of preamble sequence groupings. For example, group 1-3 preambles are configured, wherein the group 1 preamble corresponds to band 1, the group 2 preamble corresponds to band 2, and the group 3 preamble corresponds to band 3, or the group 1 preamble corresponds to CC 1, the group 2 preamble corresponds to CC 2, and the group 3 preamble corresponds to CC 3. When the Msg1 carries a preamble sequence in the group 1 preamble, it indicates that the Msg1 and the Msg3 are supported to be transmitted on different CCs or bands, and indicates that the band 1 or the CC 1 is expected to be used to transmit the Msg3. Or, when the Msg1 carries a preamble sequence in the group 2 preamble, it indicates that the Msg1 and the Msg3 are supported to be transmitted on different CCs or bands, and indicates that the band 2 or the CC 2 is expected to be used to transmit the Msg3. Or, when the Msg1 carries a preamble sequence in the group 3 preamble, it indicates that the Msg1 and the Msg3 are supported to be transmitted on different CCs or bands, and indicates that the band 3 or the CC 3 is expected to be used to transmit the Msg3.

[0177] In a second optional manner, the first CC or band belongs to a first frequency domain resource grouping, and the first frequency domain resource grouping is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or band expected to be used to transmit the second information. After receiving the first information, the network device can determine, according to the first frequency domain resource grouping, that the terminal device supports the first information and the second information to be transmitted on different CCs or bands, and / or a CC or band expected to be used to transmit the second information.

[0178] By using the first CC or band in a certain frequency domain resource grouping to transmit the Msg1, it is implicitly indicated that the first information and the second information are supported to be transmitted on different CCs or bands. And by using the first CC or band in a certain frequency domain resource grouping to transmit the Msg1, it is implicitly indicated that a CC or band corresponding to the frequency domain resource grouping is expected to be selected to transmit the second information. So that the network device indicates, based on the capability information of the terminal device, a CC or band used to transmit the second information to the terminal device.

[0179] Specifically, the terminal device can configure the correspondence between the multiple CCs or bands and the multiple frequency domain resources that can be used for transmitting the second information. Correspondingly, the network device also configures the correspondence between the multiple CCs or bands and the multiple frequency domain resources that can be used for transmitting the second information. For example, group 1~3 RACH resources are configured, wherein the group 1 RACH resource corresponds to band 1, the group 2 RACH resource corresponds to band 2, and the group 3 RACH resource corresponds to band 3, or the group 1 RACH resource corresponds to CC 1, the group 2 RACH resource corresponds to CC 2, and the group 3 RACH resource corresponds to CC 3. When the terminal device transmits Msg1 in the CC or band of the group 1 RACH resource, it indicates that Msg1 and Msg3 are supported to be transmitted on different CCs or bands, and indicates that the band 1 or CC 1 is expected to be used for transmitting Msg3. Or, when the terminal device transmits Msg1 in the CC or band of the group 2 RACH resource, it indicates that Msg1 and Msg3 are supported to be transmitted on different CCs or bands, and indicates that the band 2 or CC 2 is expected to be used for transmitting Msg3. Or, when the terminal device transmits Msg1 in the CC or band of the group 3 RACH resource, it indicates that Msg1 and Msg3 are supported to be transmitted on different CCs or bands, and indicates that the band 3 or CC 3 is expected to be used for transmitting Msg3.

[0180] Optionally, the correspondence between multiple time domain resource groups and multiple CCs or bands can be configured, and the support of transmitting the first information and the second information on different CCs or bands and / or the expected CC or band for transmitting the second information is indicated by the time domain resource group. Or, the correspondence between multiple time domain resource and frequency domain resource groups and multiple CCs or bands can be configured, and the support of transmitting the first information and the second information on different CCs or bands and / or the expected CC or band for transmitting the second information is indicated by the time domain resource and frequency domain resource group. Similar to the above, it will not be repeated here.

[0181] Optionally, the terminal device can receive configuration information from the network device, so that the terminal device is configured based on the configuration information. The configuration information includes at least one of the following: the correspondence between the multiple CCs or bands that can be used for transmitting the second information and the multiple preamble sequence groups, and the correspondence between the multiple CCs or bands that can be used for transmitting the second information and the multiple frequency domain resource groups.

[0182] Optionally, when the number of times that the terminal device transmits the first information on the first CC or band exceeds a first threshold, the first preamble sequence group or the first frequency domain resource group indicates that the first information and the second information are scheduled on different CCs or bands, and / or the CC or band expected to be used for transmitting the second information. For example, the first threshold can be X, X is an integer greater than or equal to 2.

[0183] The first threshold can be configured by the network device to the terminal device. By configuring the first threshold, the terminal device reports the capability information to the network device when it realizes that the coverage performance of the preamble cannot be sufficiently guaranteed, so as to use a band or CC with better coverage performance for transmitting Msg 3 in the next transmission.

[0184] It should be understood that in the initial random access process, after the terminal device transmits the preamble to the network device, if the RAR is not received, power ramping needs to be performed. That is, after each transmission of the preamble, if the RAR is not received, the transmission power value needs to be increased step by step. If the preamble is still not successful after transmitting X times, it means that the coverage performance of the preamble is poor, and therefore, when transmitting the preamble for the X+1 time, the preamble sequence in the first preamble sequence group is carried by the first information, or the first information is transmitted on the first CC or band in the first frequency domain resource group, to implicitly indicate the capability information of the terminal device, so that the network device knows that the terminal device expects to use a band or CC with better coverage performance for transmitting Msg 3 in the next transmission.

[0185] S702, the terminal device receives a first response from the network device, and the first response is used for scheduling transmission of the second information.

[0186] The first response can be a random access response (RAR). The first response can include a timing advance (TA), and after the terminal device receives the first response, the terminal device can adjust the transmission time of the terminal device according to the value of the TA, so as to realize synchronous transmission.

[0187] The first response can further include first indication information, which is used to indicate the second CC or band. Thus, the terminal device transmits the second information to the network device on the second CC or band. Optionally, the first response includes an uplink grant (UL grant) field. The first indication information can be added in a reserved field in the UL grant field. Alternatively, the first indication information can be added in a PUSCH frequency resource allocation field in the UL grant field. For example, the range of PRBs is reduced, so that the number of bits used for the PUSCH frequency resource allocation field can contain both the information of the CC or band and the information of the PRB. For example, 14 bits can contain both the information of the CC or band and the information of the PRB.

[0188] Specifically, if the network device determines that the terminal device supports transmission of the first information and the second information on different CCs or bands, the network device determines to indicate the second CC or band to the terminal device. In addition, according to the CC or band expected to be used by the terminal device for transmission of the second information, the network device determines the second CC or band and sends the first response to the terminal device. The second CC or band can be the same as the CC or band expected to be used by the terminal device, or the second CC or band can be different from the CC or band expected to be used by the terminal device. Alternatively, the network device can randomly select one of N uplink frequency domain resources included in the cell where the terminal device is located as the second CC or band.

[0189] Further, the cell where the terminal device is located includes N uplink frequency domain resources. The first indication information includes a plurality of bits, and the values corresponding to the plurality of bits are used to indicate the second CC or band in the N uplink frequency domain resources. The values corresponding to the plurality of bits can be index values of the CC or band. For example, the cell where the terminal device is located includes four uplink frequency domain resources, which include band0, band1, band2, and band3, and the index values are 0, 1, 2, and 3, respectively. The network device can use two bits to represent the index values of the four bands, 00 corresponds to band0, 01 corresponds to band1, 10 corresponds to band2, and 11 corresponds to band3. When the value of the first indication information is 10, it indicates that the second information is transmitted on band2. When the value of the first indication information is 11, it indicates that the second information is transmitted on band3. Other similar cases are not described here.

[0190] Further, the first indication information includes a plurality of bits, an i-th bit of the plurality of bits is used to indicate an i-th uplink frequency domain resource of the N uplink frequency domain resources as the second CC or band. For example, a cell where the terminal device is located contains 5 uplink frequency domain resources, the 5 uplink frequency domain resources include CC0, CC1, CC2, CC3 and CC4, and the network device can indicate the corresponding CCs through 5 bits, the 1st bit corresponds to CC0, the 2nd bit corresponds to CC1, the 3rd bit corresponds to CC2, the 4th bit corresponds to CC3, and the 5th bit corresponds to CC4. When the first indication information is 00100, it indicates that the second information is transmitted using CC2. When the first indication information is 01000, it indicates that the second information is transmitted using CC1. Other similar, not described here.

[0191] S703, the terminal device sends the second information to the network device on the second CC or band, the second information is a message Msg3, and the first CC or band is different from the second CC or band.

[0192] The first CC or band being different from the second CC or band can be understood as: the first CC being different from the second CC, or the first band being different from the second band, or the first CC being different from the second CC and the first band being different from the second band.

[0193] The Msg3 can include a unique identifier (ID) of the terminal device, and the identifier is used for conflict resolution to distinguish terminal devices that send conflicts.

[0194] The second CC or band is M uplink frequency domain resources of N uplink frequency domain resources contained by a cell where the terminal device is located, N is an integer greater than or equal to 3, and M is an integer less than or equal to N. The N uplink frequency domain resources can include one NUL band or CC and a plurality of SUL bands or CCs, and the second CC or band can be a NUL CC or NUL band, or the second CC or band can also be a SUL CC or SUL band.

[0195] It should be noted that the first CC or band can be a medium frequency resource which is relatively rich in frequency domain resources, so as to avoid reducing the probability of resource collision and improve the success rate of random access. The second CC or band can be a low-frequency resource with good coverage performance, so as to guarantee the coverage performance of subsequent transmission after the random access is successful. Of course, the first CC or band or the second CC or band can also be not limited, and can be any one of the N uplink frequency domain resources.

[0196] In the embodiments of the present application, the first information and the second information are respectively transmitted by using different CCs or bands, the first information is transmitted by using the middle frequency resource which is relatively rich in frequency domain resource, so as to reduce the probability of resource collision and improve the success rate of random access. The second information is transmitted by using the low frequency resource which has better coverage performance, so as to guarantee the coverage performance of subsequent transmission after the success of random access.

[0197] As shown in FIG. 8, FIG. 8 is a flow diagram of another communication method provided by the embodiments of the present application. The method mainly includes the following steps:

[0198] S801, the terminal device sends first information to the network device, wherein the first information is used for requesting random access.

[0199] The first information can be Msg1.

[0200] Optionally, when the terminal device performs initial random access, the terminal device is in an idle state and cannot directly report the capability information of the terminal device. The capability information can include whether the first information and the second information are supported to be transmitted on different CCs or bands, and / or the CC or band expected to be used for transmitting the second information. The terminal device can implicitly report the capability information of the terminal device by the following two ways.

[0201] The first information carries a preamble sequence, the preamble sequence belongs to a first preamble sequence group, and the first preamble sequence group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or the CC or band expected to be used for transmitting the second information. After receiving the first information, the network device can determine, according to the first preamble sequence group, that the terminal device supports the first information and the second information to be transmitted on different CCs or bands, and / or the CC or band expected to be used for transmitting the second information.

[0202] The first CC or band belongs to a first frequency domain resource group, and the first frequency domain resource group is used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands, and / or the CC or band expected to be used for transmitting the second information. After receiving the first information, the network device can determine, according to the first frequency domain resource group, that the terminal device supports the first information and the second information to be transmitted on different CCs or bands, and / or the CC or band expected to be used for transmitting the second information.

[0203] Optionally, when the terminal device transmits the first information on the same CC or band more than a first threshold number of times, the first preamble sequence group or the first frequency domain resource group indicates that the first information and the second information are scheduled on different CCs or bands and / or the CC or band expected to be used to transmit the second information.

[0204] S802, the terminal device receives a first response from the network device, the first response including first indication information, the first indication information indicating a member carrier CC or a band used to transmit second information, the second information being a message Msg3.

[0205] The first response can be a random access response (RAR).

[0206] Optionally, the terminal device can transmit the second information to the network device on the CC or band indicated by the first indication information. The CC or band used by the second information is different from the CC or band used by the first information. Since there is a collision conflict in Msg 1, more RACH occasions should be configured as much as possible to minimize the collision probability. Since more resources are consumed, the first CC or band can be a mid-frequency resource with relatively abundant frequency domain resources, thereby reducing the probability of resource collision and improving the success rate of random access. The CC or band used by the second information can be a low-frequency resource with good coverage performance, thereby ensuring the coverage performance of subsequent transmission after successful random access.

[0207] The specific implementation of S801-S802 is similar to that of S701-S703 in the embodiment shown in FIG. 7. The specific implementation process of S801-S802 can refer to that of S701-S703, which will not be described here.

[0208] In the embodiments of the present application, the first indication information indicates the CC or band used to transmit the second information, so that the terminal device can transmit the second information to the network device on a CC or band different from the CC or band used by the first information. Therefore, the mid-frequency resource with relatively abundant frequency domain resources is used when transmitting the first information, the probability of resource collision is reduced, and the success rate of random access is improved. The low-frequency resource with good coverage performance is used when transmitting the second information, thereby ensuring the coverage performance of subsequent transmission after successful random access.

[0209] It can be understood that, in each of the above method embodiments, the method and operation implemented by the terminal device can also be implemented by a component (for example, a chip or a circuit) available for the terminal device, and the method and operation implemented by the network device can also be implemented by a component (for example, a chip or a circuit) available for the network device.

[0210] The embodiments of the present application can divide the functional modules of the terminal device or the network device according to the above method examples, for example, each functional module can be divided according to each function, or two or more functions can be integrated in one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software functional module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical functional division. In actual implementation, another division mode can be used. The following will be described taking the division of each functional module corresponding to each function as an example.

[0211] The above, in combination with FIG. 7-FIG. 8, details the method provided by the embodiments of the present application. In the following, in combination with FIG. 9 to FIG. 10, the communication device provided by the embodiments of the present application is detailed. It should be understood that the description of the device embodiments and the description of the method embodiments correspond to each other, therefore, the content not described in detail can be referred to the above method embodiments, and for brevity, will not be described here.

[0212] Please refer to FIG. 9, which is a structural schematic diagram of a communication device provided by an embodiment of the present application. The communication device can implement the steps or processes corresponding to the terminal device executed in the above method embodiments. In a possible design, the communication device can include a sending module 901 and a receiving module 902. Optionally, the communication device can further include a storage module for storing device program code and / or data.

[0213] The communication device can be a terminal device in the above embodiments, for example, a terminal device or a communication module in the terminal device, or a circuit or a chip responsible for the communication function in the terminal device.

[0214] In one embodiment,

[0215] The sending module 901 is configured to send first information to a network device on a first component carrier (CC) or frequency band (band), wherein the first information is used to request random access;

[0216] The receiving module 902 is configured to receive a first response from the network device, wherein the first response is used to schedule transmission of second information.

[0217] The sending module 901 is configured to send the second information to the network device on a second CC or band, wherein the second information is a message Msg3, and the first CC or band is different from the second CC or band.

[0218] Optionally, the first response includes first indication information, the first indication information being used to indicate the second CC or band.

[0219] Optionally, the first information carries a preamble sequence, the preamble sequence belonging to a first preamble sequence group, the first preamble sequence group being used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands and / or a CC or band expected to be used for transmitting the second information.

[0220] Optionally, the first CC or band belongs to a first frequency domain resource group, the first frequency domain resource group being used to indicate that the first information and the second information are supported to be transmitted on different CCs or bands and / or a CC or band expected to be used for transmitting the second information.

[0221] Optionally, the receiving module 902 is further configured to receive configuration information from the network device, the configuration information including at least one of the following: a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of preamble sequence groups, and a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of frequency domain resource groups.

[0222] Optionally, when a number of times of transmitting the first information on the first CC or band exceeds a first threshold value, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled on different CCs or bands and / or a CC or band expected to be used for transmitting the second information.

[0223] Optionally, the first threshold value is configured by the network device.

[0224] Optionally, the second CC or band is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, the N being an integer greater than or equal to 3, and the M being an integer less than or equal to N.

[0225] Optionally, the first indication information includes a plurality of bits, values corresponding to the plurality of bits being used to indicate the second CC or band in the N uplink frequency domain resources.

[0226] In another embodiment:

[0227] The sending module 901 is configured to send first information to a network device, the first information being used to request random access.

[0228] The receiving module 902 is configured to receive a first response from the network device, wherein the first response comprises first indication information, and the first indication information is used to indicate a member carrier (CC) or a frequency band (band) used for transmitting second information, and the second information is a message (Msg3).

[0229] Optionally, the CC or band used by the first information is different from the CC or band used by the second information.

[0230] Optionally, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group, and the first preamble sequence group is used to indicate that the first information and the second information are supported to be scheduled on different CCs or bands and / or that a CC or band expected to be used for transmitting the second information.

[0231] Optionally, the CC or band used by the first information belongs to a first frequency domain resource group, and the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled on different CCs or bands and / or that a CC or band expected to be used for transmitting the second information.

[0232] Optionally, the receiving module 902 is further configured to receive configuration information from the network device, and the configuration information comprises at least one of the following: a correspondence between a plurality of CCs or bands that can be used by the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands that can be used by the second information and a plurality of frequency domain resource groups.

[0233] Optionally, when a number of times of sending the first information on a same CC or band exceeds a first threshold value, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled on different CCs or bands and / or that a CC or band expected to be used for transmitting the second information.

[0234] Optionally, the first threshold value is configured by the network device.

[0235] Optionally, the CC or band used by the second information is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where a terminal device is located, the N is an integer greater than or equal to 3, and the M is an integer less than or equal to N.

[0236] Optionally, the first indication information comprises a plurality of bits, and values corresponding to the plurality of bits are used to indicate the CC or band used by the second information in the N uplink frequency domain resources.

[0237] In a possible design, when the communication apparatus is a terminal device or a communication module in a terminal device, the sending module 901 and the receiving module 902 can be implemented by a transceiver circuit. Optionally, the communication apparatus can further include a processing module. The processing module can be implemented by one or more processors. Specifically, the processor can include a Modem chip, or a System on Chip (SoC) chip or a SIP chip including a Modem core.

[0238] In a possible design, when the communication apparatus is a circuit or chip responsible for communication functions in a terminal device, such as a Modem chip or a System on Chip (SoC) chip or a SIP chip including a Modem core, the sending module 901 and the receiving module 902 can be implemented by an interface circuit or a data transceiver circuit on the chip. Optionally, the communication apparatus can further include a processing module. The processing module can be implemented by a circuit system including one or more processors or processor cores in the chip.

[0239] It should be noted that the implementation of each module can also correspond to the description of the corresponding method embodiments shown in FIGS. 7-8, and the method and functions performed by the terminal device in the above embodiments are executed.

[0240] Please refer to FIG. 10, which is a structural diagram of another communication apparatus according to an embodiment of the present application. The communication apparatus can implement the steps or procedures performed by the network device in the above method embodiments. In a possible design, the communication apparatus can include a receiving module 1001, a processing module 1002, and a sending module 1003. Optionally, the communication apparatus can further include a storage module for storing device program code and / or data.

[0241] The communication apparatus can be the network side apparatus in the above embodiments, for example, a network device or a communication module in a network device, or a circuit or chip responsible for communication functions in a network device.

[0242] In one embodiment:

[0243] The receiving module 1001 is configured to receive, from a terminal device, first information on a first Component Carrier (CC) or frequency band (band), where the first information is used to request random access.

[0244] The sending module 1003 is configured to send, to the terminal device, a first response, where the first response is used to schedule transmission of second information.

[0245] The receiving module 1001 is further configured to receive, from the terminal device, the second information on a second CC or band, where the second information is a message Msg3, and the first CC or band is different from the second CC or band.

[0246] Optionally, the first response includes first indication information, and the first indication information is used to indicate the second CC or band.

[0247] Optionally, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group.

[0248] The processing module 1002 is configured to determine, according to the first preamble sequence group, that the terminal device supports transmission of the first information and the second information on different CCs or bands and / or a CC or band expected to be used for transmission of the second information.

[0249] Optionally, the first CC or band belongs to a first frequency domain resource group.

[0250] The processing module 1002 is configured to determine, according to the first frequency domain resource group, that the terminal device supports transmission of the first information and the second information on different CCs or bands and / or a CC or band expected to be used for transmission of the second information.

[0251] Optionally, the sending module 1003 is further configured to send, to the terminal device, configuration information, where the configuration information includes at least one of the following: a correspondence between a plurality of CCs or bands capable of being used for transmission of the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands capable of being used for transmission of the second information and a plurality of frequency domain resource groups.

[0252] Optionally, when a number of times of sending, by the terminal device, the first information on the first CC or band exceeds a first threshold value, the first preamble sequence group or the first frequency domain resource group is used to indicate that the terminal device supports scheduling of the first information and the second information on different CCs or bands and / or a CC or band expected to be used for transmission of the second information.

[0253] Optionally, the first threshold value is configured by a network device for the terminal device.

[0254] Optionally, the second CC or band is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, where N is an integer greater than or equal to 3, and M is an integer less than or equal to N.

[0255] In another embodiment,

[0256] The receiving module 1001 is configured to receive first information from a terminal device, where the first information is used to request random access.

[0257] The sending module 1003 is configured to send a first response to the terminal device, where the first response comprises first indication information, and the first indication information is used to indicate a member carrier (CC) or a frequency band (band) used for transmitting second information, and the second information is a message (Msg3).

[0258] Optionally, the CC or band used by the first information is different from the CC or band used by the second information.

[0259] Optionally, the first information carries a preamble sequence, and the preamble sequence belongs to a first preamble sequence group.

[0260] The processing module 1002 is configured to determine, according to the first preamble sequence group, that the terminal device supports scheduling of the first information and the second information on different CCs or bands and / or that the terminal device expects to use a CC or a band for transmitting the second information.

[0261] Optionally, the CC or band used by the first information belongs to a first frequency domain resource group.

[0262] The processing module 1002 is configured to determine, according to the first frequency domain resource group, that the terminal device supports scheduling of the first information and the second information on different CCs or bands and / or that the terminal device expects to use a CC or a band for transmitting the second information.

[0263] Optionally, the sending module 1003 is further configured to send configuration information to the terminal device, where the configuration information comprises at least one of the following: a correspondence between a plurality of CCs or bands available for the second information and a plurality of preamble sequence groups, and a correspondence between the plurality of CCs or bands available for the second information and a plurality of frequency domain resource groups.

[0264] Optionally, when a number of times of sending the first information on a same CC or band exceeds a first threshold value, the first preamble sequence group or the first frequency domain resource group is used to indicate that the terminal device supports scheduling of the first information and the second information on different CCs or bands and / or that the terminal device expects to use a CC or a band for transmitting the second information.

[0265] Optionally, the first threshold value is configured by the network device for the terminal device.

[0266] Optionally, the CC or band used by the second information is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where the terminal device is located, N is an integer greater than or equal to 3, and M is an integer less than or equal to N.

[0267] Optionally, the first indication information includes a plurality of bits, and values of the plurality of bits are used to indicate a CC or a band used by the second information in the N uplink frequency domain resources.

[0268] In a possible design, when the communication apparatus is a network device or a communication module in a network device, the function of the processing module 1002 can be implemented by one or more processors. Specifically, the processor can include a Modem chip, or a System on Chip (SoC) chip or a SIP chip including a Modem core. The functions of the receiving module 1001 and the sending module 1003 can be implemented by transceiver circuitry.

[0269] In a possible design, when the communication apparatus is a circuit or chip responsible for communication functions in a network device, such as a Modem chip or a System on Chip (SoC) chip or a SIP chip including a Modem core, the function of the processing module 1002 can be implemented by circuitry including one or more processors or processor cores in the chip. The functions of the receiving module 1001 and the sending module 1003 can be implemented by interface circuitry or data transceiver circuitry on the chip.

[0270] It should be noted that the implementation of each module can also correspond to the description of the corresponding method embodiments shown in FIGS. 7-8, and the method and function performed by the network device in the above embodiments are executed.

[0271] FIG. 11 is a structural schematic diagram of a terminal device according to an embodiment of the present application. The terminal device can be applied in the system shown in FIG. 1, and perform the functions of the terminal device in the above method embodiments, or implement the steps or procedures performed by the terminal device in the above method embodiments.

[0272] As shown in FIG. 11, the terminal device includes a processor 1101 and a transceiver 1102. The transceiver 1102 includes a transmitter 1121, a receiver 1122, and an antenna 1123. The receiver 1122 can be configured to receive transmission control information through the antenna 1123, and the transmitter 1121 can be configured to send transmission feedback information to the network device through the antenna 1123. Optionally, the terminal device further includes a memory 1103. The processor 1101, the transceiver 1102, and the memory 1103 can communicate with each other through internal connection paths, and transfer control and / or data signals. The memory 1103 is configured to store a computer program, and the processor 1101 is configured to invoke and run the computer program from the memory 1103 to control the transceiver 1102 to transceive signals. Optionally, the terminal device can further include an antenna configured to send uplink data or uplink control signaling output by the transceiver 1102 through wireless signals.

[0273] The processor 1101 and the memory 1103 can be integrated into one processing apparatus, and the processor 1101 is configured to execute program codes stored in the memory 1103 to implement the above functions. In specific implementation, the memory 1103 can also be integrated in the processor 1101, or be independent of the processor 1101.

[0274] The transceiver 1102 can correspond to the receiving module and the sending module in FIG. 9, and can also be referred to as a transceiving unit or a transceiving module. The transceiver 1102 can include a receiver (or receiver, receiver circuit) and a transmitter (or transmitter, transmitter circuit). Among them, the receiver is configured to receive signals, and the transmitter is configured to transmit signals.

[0275] It should be understood that the terminal device shown in FIG. 11 can implement each process of the terminal device involved in the method embodiments shown in FIGS. 7-8. The operation and / or function of each module in the terminal device are respectively used to implement the corresponding flow in the above method embodiments. For details, please refer to the description in the above method embodiments. To avoid repetition, the detailed description is appropriately omitted here.

[0276] The processor 1101 can be used to execute the actions described in the preceding method embodiments and implemented internally by the terminal device, and the transceiver 1102 can be used to execute the actions described in the preceding method embodiments and sent or received by the terminal device to the network device. For details, please refer to the description in the preceding method embodiments, which will not be repeated here.

[0277] The processor 1101 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device, transistor logic, hardware components, or any combination thereof. It can implement or execute various example logical blocks, modules, and circuits described in connection with the disclosure. The processor 1101 can also be a combination of computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The terminal device can also include a communication bus, which can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The communication bus is used to realize the connection and communication between the components. The transceiver 1102 is used to communicate with other node devices. The memory 1103 can include volatile memory, such as non-volatile random access memory (NVRAM), phase change RAM (PRAM), magnetoresistive RAM (MRAM), etc., and can also include non-volatile memory, such as at least one magnetic disk storage device, electrically erasable programmable read-only memory (EEPROM), flash memory device, such as NOR flash memory or NAND flash memory, semiconductor device, such as solid state disk (SSD), etc. The memory 1103 can also be at least one storage device located away from the processor 1101. The memory 1103 can also store a set of computer program codes or configuration information. Optionally, the processor 1101 can also execute the program stored in the memory 1103. The processor can cooperate with the memory and the transceiver to execute any method and function of the terminal device in the above embodiments.

[0278] FIG. 12 is a structural schematic diagram of a network device provided in an embodiment of the present application. The network device can be applied in the system shown in FIG. 1, and can execute the functions of the network device in the above method embodiments, or implement the steps or processes executed by the network device in the above method embodiments.

[0279] As shown in FIG. 12, the network device includes a processor 1201 and a transceiver 1202. The transceiver 1202 includes a transmitter 1221, a receiver 1222 and an antenna 1223. The transmitter 1221 can be configured to send transmission control information to the terminal device through the antenna 1223, and the receiver 1222 can be configured to receive transmission feedback information sent by the terminal device through the antenna 1223. Optionally, the network device further includes a memory 1203. The processor 1201, the transceiver 1202 and the memory 1203 can communicate with each other through internal connection paths, and transfer control and / or data signals. The memory 1203 is configured to store a computer program, and the processor 1201 is configured to invoke and run the computer program stored in the memory 1203 to control the transceiver 1202 to transceive signals. Optionally, the network device can further include an antenna configured to send uplink data or uplink control signaling output by the transceiver 1202 through wireless signals.

[0280] The processor 1201 described above can correspond to the processing module in FIG. 10. The processor 1201 can be integrated with the memory 1203 into a processing apparatus, and the processor 1201 is configured to execute program codes stored in the memory 1203 to implement the above functions. In specific implementation, the memory 1203 can also be integrated in the processor 1201, or independent of the processor 1201.

[0281] The transceiver 1202 described above can correspond to the receiving module and the sending module in FIG. 10, and can also be referred to as a transceiving unit or a transceiving module. The transceiver 1202 can include a receiver (or a receiver, a receiving circuit) and a transmitter (or a transmitter, a transmitting circuit). The receiver is configured to receive signals, and the transmitter is configured to transmit signals.

[0282] It should be understood that the network device shown in FIG. 12 can implement various processes related to the network device in the method embodiments shown in FIGS. 7-8. The operations and / or functions of various modules in the network device are respectively implemented to implement the corresponding processes in the above method embodiments. For details, please refer to the description in the above method embodiments, and appropriate detailed description is omitted here.

[0283] The processor 1201 described above can be configured to perform the actions implemented by the network device described in the above method embodiments, and the transceiver 1202 can be configured to perform the actions of sending or receiving by the network device to or from the terminal device described in the above method embodiments. For details, please refer to the description in the above method embodiments, and no further description is given here.

[0284] The processor 1201 can be various types of processors, as discussed more fully below. The network device can also include a communications bus, which can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, or the like. The bus can be divided into an address bus, a data bus, a control bus, or the like. The communications bus is used to enable communications between the components. The transceiver 1202 of the device is used to communicate signaling or data with other devices. The memory 1203 can be various types of memory, as discussed more fully below. The memory 1203 can also optionally be at least one storage device that is located remotely from the processor 1201. The memory 1203 stores a set of computer program instructions or configuration information, and the processor 1201 executes the program instructions stored in the memory 1203. The processor can cooperate with the memory and the transceiver to perform any of the methods or functions of the network device described above.

[0285] The embodiments of the present application also provide a chip system, which includes a processor for supporting a network device or a terminal device to implement the functions involved in any of the embodiments described above, such as generating or processing the CC or band involved in the methods described above.

[0286] In a possible design, the chip system can further include a memory for storing computer programs and data necessary for the network device or the terminal device. The chip system can be composed of a chip, or can include a chip and other discrete components. The input and output of the chip system correspond to the receiving and sending operations of the network device or the terminal device in the method embodiments, respectively.

[0287] According to the method provided in the embodiments of the present application, the present application further provides a computer program product, which includes a computer program. When the computer program runs on a computer, the computer program causes the computer to perform the method in any one of the embodiments shown in FIG. 7 or FIG. 8.

[0288] According to the method provided in the embodiments of the present application, the present application further provides a computer readable medium, which stores a computer program. When the computer program runs on a computer, the computer program causes the computer to perform the method in any one of the embodiments shown in FIG. 7 or FIG. 8.

[0289] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as high-density digital video disc (digital video disc, DVD)), or semiconductor media (such as solid state disc (solid state disc, SSD)) and the like.

[0290] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A communication method characterized by comprising: The method comprises: sending first information to a network device on a first component carrier (CC) or frequency band (band), the first information being used for requesting random access; receiving a first response from the network device, the first response being used for scheduling transmission of second information; sending the second information to the network device on a second CC or band, the second information being a message (Msg3), the first CC or band being different from the second CC or band. The method of claim 1, wherein The first response comprises first indication information, the first indication information being used for indicating the second CC or band. The method of claim 1 or 2, wherein The first information carries a preamble sequence, the preamble sequence belonging to a first preamble sequence group, the first preamble sequence group being used for indicating that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or band expected to be used for transmitting the second information. The method of claim 1 or 2, wherein The first CC or band belongs to a first frequency domain resource group, the first frequency domain resource group being used for indicating that the first information and the second information are supported to be transmitted on different CCs or bands, and / or a CC or band expected to be used for transmitting the second information. The method according to claim 3 or 4, characterized in that The method further comprises: receiving configuration information from the network device, the configuration information comprising at least one of: a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of preamble sequence groups, and a correspondence between a plurality of CCs or bands capable of being used for transmitting the second information and a plurality of frequency domain resource groups. The method according to any one of claims 3 to 5, characterized in that When a number of times of sending the first information on the first CC or band exceeds a first threshold, the first preamble sequence group or the first frequency domain resource group is used to indicate that the first information and the second information are supported to be scheduled on different CCs or bands, and / or a CC or band expected to be used for transmitting the second information. The method of claim 6, wherein The first threshold is configured by the network device. The method according to any one of claims 1 to 7, characterized in that The second CC or band is M uplink frequency domain resources in N uplink frequency domain resources included in a cell where a terminal device is located, the N being an integer greater than or equal to 3, and the M being an integer less than or equal to N. The method of claim 8, wherein The first indication information comprises a plurality of bits, values of the plurality of bits being used to indicate the second CC or band in the N uplink frequency domain resources. A communication method characterized by comprising: The method comprises: receiving first information from a terminal device on a first component carrier (CC) or frequency band (band), the first information being used for requesting random access; sending a first response to the terminal device, the first response being used for scheduling transmission of second information; receiving the second information from the terminal device on a second CC or band, the second information being a message (Msg3), the first CC or band being different from the second CC or band. The method of claim 10, wherein The first response comprises first indication information, the first indication information being used for indicating the second CC or band. The method as claimed in claim 10 or 11, characterized in that The first information carries a preamble sequence, the preamble sequence belongs to a first preamble sequence group, and the method further includes: According to the first preamble sequence group, it is determined that the terminal device supports transmission of the first information and the second information on different CCs or bands and / or a CC or band expected to be used for transmission of the second information. The method as claimed in claim 10 or 11, characterized in that The first CC or band belongs to a first frequency domain resource group, and the method further includes: According to the first frequency domain resource group, it is determined that the terminal device supports transmission of the first information and the second information on different CCs or bands and / or a CC or band expected to be used for transmission of the second information. The method of claim 12 or 13, wherein The method further includes: Sends configuration information to the terminal device, the configuration information including at least one of: a correspondence between a plurality of CCs or bands capable of being used for transmission of the second information and a plurality of preamble sequence groups, and a correspondence between a plurality of CCs or bands capable of being used for transmission of the second information and a plurality of frequency domain resource groups. The method according to any one of claims 12 to 14, characterized in that When the number of times that the terminal device transmits the first information on the first CC or band exceeds a first threshold value, the first preamble sequence group or the first frequency domain resource group is used to indicate support for scheduling of the first information and the second information on different CCs or bands and / or a CC or band expected to be used for transmission of the second information. The method of claim 15, wherein The first threshold value is configured by a network device for the terminal device. The method according to any one of claims 10 to 16, characterized in that The second CC or band is M of N uplink frequency domain resources included in a cell in which the terminal device is located, N is an integer greater than or equal to 3, and M is an integer less than or equal to N. The method of claim 17, wherein The first indication information includes a plurality of bits, and values corresponding to the plurality of bits are used to indicate the second CC or band of the N uplink frequency domain resources. A communication device, characterized by The communication device includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the communication device to perform the method of any one of claims 1-9. A communication device characterized by comprising: The communication device includes a memory and a processor, the memory is used to store a computer program, and the processor runs the computer program to enable the communication device to perform the method of any one of claims 10-18. A computer-readable storage medium, characterized by The computer readable storage medium includes a computer program, when the computer program is run by a processor, the method as claimed in any one of claims 1-9, or any one of claims 10-18 is implemented. A chip characterized by The chip includes a processor and a communication interface, the communication interface is used to communicate with external devices or internal devices, and the processor is used to implement the method as claimed in any one of claims 1-9, or any one of claims 10-18. The chip includes a processor and a communication interface, the communication interface is used to communicate with external devices or internal devices, and the processor is used to implement the method as claimed in any one of claims 1-9, or any one of claims 10-18.

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