Communication method and apparatus

Abstract

A communication method and apparatus, which relate to the technical field of communications and are used for reducing the failure probability of random access. The method comprises: a first terminal device receiving first information from a first network device, wherein the first information comprises first random access configuration information of a first candidate interference group and a first transmission resource of the first candidate interference group; if determining that the first terminal device belongs to the first candidate interference group, the first terminal device using the first random access configuration information to send a random access request to the first network device; and on the basis of the first transmission resource, receiving a random access response from the first network device. On the basis of the solution of the present application, a first network device can identify interference from a first candidate interference group as early as possible, and can use a dedicated resource of the first candidate interference group to send a random access response, so as to achieve interference avoidance for the second network device in a random access procedure, thereby reducing the failure probability of accessing the first network device by a first terminal device.

Description

Communication method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202410458300.8, filed on April 16, 2024, and entitled “A communication method and apparatus”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular, to a communication method and apparatus. BACKGROUND

[0004] Satellite communication has the advantages of wide coverage, long communication distance, high reliability, great flexibility, and high throughput. It can be applied in the fields of aviation communication, maritime communication, military communication, etc. without being affected by geographical environment, climate condition, and natural disaster. Introducing satellite communication into the 5th generation (5G) technology can provide communication services for areas that are difficult to be covered by ground network, such as ocean, forest, and mountain, provide more reliable network connection for users on transportation tools, such as train, airplane, and ship, provide more data transmission resources for user equipment (UE), and support more number of connections, etc.

[0005] Introducing satellite communication into the 5G technology means that the future UE can connect to the ground base station or the satellite base station. If the satellite base station and the ground base station use different frequency bands, they will not interfere with each other. However, if the satellite base station and the ground base station use the same frequency band and their coverage areas overlap, the UE in the overlapping range will be interfered by the signal sent by the satellite base station to other UEs in the overlapping range when receiving the signal from the ground base station. In this case, if the UE is accessing the ground base station, the UE access will fail. Conversely, the UE accessing the satellite base station will also have the same problem. SUMMARY

[0006] The present application provides a communication method and apparatus to reduce the probability of access failure of the UE in the overlapping range of the coverage area of the satellite base station and the ground base station when accessing the satellite base station or the ground base station.

[0007] In a first aspect, a communication method is provided. The method can be performed by a terminal device, e.g., a first terminal device or a module in the first terminal device, or a circuit or processor or chip (e.g., a Modem chip, also referred to as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip including a Modem core) in the first terminal device responsible for communication functions. The method is exemplified by being performed by the first terminal device, and includes: receiving, by the first terminal device, first information from a first network device, the first information including first random access configuration information of a first candidate interference group and first transmission resources of the first candidate interference group, the first candidate interference group being one of M candidate interference groups, the M candidate interference groups being related to a first synchronization signal and physical broadcast channel block (SSB) of the first network device and a second SSB of a second network device, M being a positive integer; and if the first terminal device determines that it belongs to the first candidate interference group, using the first random access configuration information to send a random access request to the first network device, and receiving, from the first network device, a random access response according to the first transmission resources.

[0008] Through the above method, when the first network device sends a signal (e.g., a random access response) to the first terminal device using a first beam, the signal can be interfered by a signal (e.g., a second SSB, a random access response, or other data signals) sent by the second network device to other terminal devices using a second beam. To remove the interference, the first network device can send first information to the first terminal device, the first information including random access configuration information of a first candidate interference group and dedicated resources, the first candidate interference group being related to the first SSB and the second SSB. Therefore, the first candidate interference group can be used to represent the interference between the first beam sending the first SSB and the second beam sending the second SSB, and can be considered as an interference group having a certain degree of interference between the first beam and the second beam. Based on this, if the terminal device determines that it belongs to the first candidate interference group, it can use the random access configuration information of the first candidate interference group to feed back a random access request to the first network device in a random access process, so that the first network device can identify the interference of the first candidate interference group as soon as possible, and can use the dedicated resources of the first candidate interference group to send a random access response to the first terminal device, thereby avoiding interference from the second beam of the second network device in the process of using the first beam to provide random access services for the terminal, and ensuring that the first terminal device can successfully access the first network device.

[0009] For example, when the first network device is a ground base station and the second network device is a satellite base station, even if the first terminal device is located in an overlapping range of the coverage areas of the ground base station and the satellite base station, the first terminal device can still access the ground base station using the dedicated resource configured in advance by the ground base station, thereby avoiding interference from the satellite base station in the random access process and reducing the failure probability of the first terminal device accessing the ground base station. Similarly, when the first network device is a satellite base station and the second network device is a ground base station, the first terminal device can access the satellite base station using the dedicated resource configured in advance by the satellite base station, thereby reducing the failure probability of the first terminal device accessing the satellite base station.

[0010] In a possible design, the second network device includes one or more, the K second SSBs of the one or more second network devices include K, K being a positive integer, if the beam of the first network device sending the first SSB is a first beam and the K beams of the one or more second network devices sending the K second SSBs are K second beams, then the M candidate interference groups can include at least one of the following: no interference between the first beam and the K second beams, weak interference between the first beam and I second beams of the K second beams, or strong interference between the first beam and I second beams of the K second beams, I being any integer greater than or equal to 1 and less than or equal to K.

[0011] Optionally, the M candidate interference groups can further include at least one of the following: secondary strong interference between the first beam and I second beams of the K second beams, secondary secondary strong interference between the first beam and I second beams of the K second beams, and so on.

[0012] Through the above design, various interference scenarios between the first beam and the K second beams can be classified, thereby obtaining the M candidate interference groups, that is, the M candidate interference groups can cover various possible scenarios of interference and non-interference between the K second beams and the first beam, so that the terminal device can access the first network device more meticulously according to the candidate interference group to which the terminal device belongs, and comprehensiveness and accuracy of interference avoidance in the random access process can be realized.

[0013] In a possible design, M is an integer greater than or equal to 2, and the first candidate interference group is one candidate interference group of the M candidate interference groups other than the candidate interference group with the minimum interference strength. For example, the first candidate interference group can be the candidate interference group with the maximum interference strength of the M candidate interference groups, such as the candidate interference group of strong interference between the first beam and I second beams of the K second beams in the above design.

[0014] Through the above design, the dedicated resource for random access can be configured for the candidate interference group with a larger interference strength, so as to avoid interference from the second beam with strong interference on the first beam of the first network device in the random access process using the dedicated resource, and the reliability of random access can be ensured.

[0015] In a possible design, the first information further includes information of a second SSB of the second network device and a decision parameter of the first candidate interference group, and the first terminal device determines that it belongs to the first candidate interference group, which can specifically be: the first terminal device determines a first reference signal receiving power of the first terminal device on the first network device according to the information of the first SSB of the first network device, and determines a second reference signal receiving power of the first terminal device on the second network device according to the information of the second SSB of the second network device, and then determines that the first terminal device belongs to the first candidate interference group if the first reference signal receiving power and the second reference signal receiving power satisfy the decision parameter.

[0016] Through the above design, the first network device can indicate the configuration information for dividing the candidate interference groups in the first information, the first terminal device can determine the candidate interference group to which it belongs according to the configuration information, and can use the corresponding random access configuration information according to its grouping to notify the first network device of the grouping information. In addition, by taking the first SSB transmitted by the first beam and the second SSB transmitted by the second beam as the reference for evaluating the interference, the interference between the first beam of the first network device and the second beam of the second network device can be accurately estimated through the measurement of the first SSB and the second SSB, and the accuracy of the interference evaluation is effectively improved.

[0017] In a further possible design, the first reference signal receiving power and the second reference signal receiving power correspond to a same receiving configuration, which includes at least one of the following: a number of receiving antennas, beamforming information, or receiving polarization information. For example, the first reference signal receiving power and the second reference signal receiving power correspond to a same number of receiving antennas, a same beamforming codebook, and a same receiving polarization mode, such as both being left polarization or both being right polarization.

[0018] Through the above design, the first terminal device can measure the first SSB of the first network device and the second SSB of the second network device under the same receiving configuration to obtain the first reference signal receiving power and the second reference signal receiving power, and the difference between the first reference signal receiving power and the second reference signal receiving power, for example, the value obtained by subtracting the second reference signal receiving power from the first reference signal receiving power, can be used to accurately represent the degree of signal interference of the terminal device on the signal transmission between the first SSB.

[0019] In a possible design, the first transmission resource and the second transmission resource of the second network device satisfy at least one of the following conditions: no overlap in time domain, no overlap in frequency domain, or different polarization manners. For example, the first transmission resource and the second transmission resource satisfy all of the above conditions, or satisfy some of the above conditions and do not satisfy others. For example, the first transmission resource and the second transmission resource correspond to different frequency points, but correspond to the same time period and the same polarization manner, or correspond to different time periods, but correspond to the same frequency point and the same polarization manner, or correspond to different polarization manners, but correspond to the same frequency point and the same time period.

[0020] With the above design, the first network device can use resources of different frequencies, resources of different time periods, or resources of different polarization manners to perform downlink transmission with the first terminal device, thereby directly avoiding downlink interference of the first network device by the second network device, and simplifying the implementation procedure of interference avoidance.

[0021] In a possible design, the first information further includes a first time delay corresponding to the first candidate interference group; and the first terminal device receives a random access response from the first network device according to the first transmission resource, specifically, the first terminal device receives the random access response from the first network device according to the first transmission resource after a first time delay after sending the random access request to the first network device.

[0022] With the above design, the first network device can reserve a certain time between receiving the random access request and sending the random access response, so as to perform random access with the first terminal device using the first transmission resource after the second network device avoids the first transmission resource (for example, a time length of the time is at least greater than a time length of the time during which the second network device switches from using the first transmission resource to using the second transmission resource orthogonal to the first transmission resource, or a time length of the time is at least greater than a time required for the first network device to interact with the second network device to avoid the first transmission resource, for example, a transmission time delay between the first network device and the second network device), thereby ensuring the success probability of random access.

[0023] In a possible design, the first information further includes second random access configuration information of a second candidate interference group, and the second candidate interference group belongs to one of the M candidate interference groups different from the first candidate interference group. Based on this, if the first terminal device determines that it belongs to the second candidate interference group, the first terminal device can use the second random access configuration information to send a random access request to the first network device and receive a random access response from the first network device.

[0024] By the above design, the first network device can indicate the random access configuration information of the at least two candidate interference groups in the first information, the first terminal device can initiate random access to the first network device according to the corresponding random access configuration information of the candidate interference group to which the first terminal device belongs, so that the first network device can perform corresponding random access operation according to the grouping of the first terminal device, and the effect of grouping access according to different interference degrees is realized.

[0025] In a further possible design, the interference strength of the second candidate interference group is lower than the interference strength of the first candidate interference group.

[0026] By the above design, the candidate interference group with stronger interference degree can be configured with dedicated resources, and the candidate interference group with weaker interference degree can not be configured with dedicated resources, so that the number of preconfigured dedicated resources can be reduced.

[0027] In a further possible design, the first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, random access occasion grouping, or random access occasion configuration information.

[0028] By the above design, the first terminal device can feed back to the first network device in the random access request grouping manner, so that the first network device can successfully learn the grouping of the terminal device according to one or more of the preamble grouping, the random access occasion grouping, or the random access occasion configuration information associated with the random access request, to perform corresponding random access process.

[0029] In a possible design, the first transmission resource includes a downlink transmission resource.

[0030] By the above design, the downlink transmission of the second network device can be avoided in the process of the downlink transmission of the first terminal device by the first network device, and the anti-interference performance of the downlink transmission can be improved.

[0031] In a possible design, the first information is carried in a system information block (SIB).

[0032] By the above design, the first network device can indicate the configuration information of each candidate interference group to all terminal devices in the coverage area when broadcasting the SIB to the terminal devices, so that the terminal devices can access the first network device according to the corresponding random access process according to the configuration information.

[0033] In a second aspect, the present application provides a communication method, which can be applied to a network side, for example, a first network device or a component (such as a circuit, a processor, a chip or a chip system) in the first network device, to perform. Taking the first network device to perform the method as an example, the method comprises: the first network device sends first information to a first terminal device, the first information comprising first random access configuration information of a first candidate interference group and a first transmission resource of the first candidate interference group, the first candidate interference group being one of M candidate interference groups, the M candidate interference groups being related to a first SSB of the first network device and a second SSB of a second network device, M being a positive integer; the first network device receives a random access request from the first terminal device, and if it is determined that the random access request is related to the first random access configuration information, sends a random access response to the first terminal device according to the first transmission resource.

[0034] In a possible design, the second network device comprises one or more, the second SSB of the one or more second network devices comprises K, K being a positive integer, if the beam of the first network device sending the first SSB is a first beam and the beam of the one or more second network devices sending the K second SSBs is K second beams, the M candidate interference groups can comprise at least one of the following: the first beam and the K second beams have no interference, the first beam and I second beams of the K second beams have weak interference, or the first beam and I second beams of the K second beams have strong interference, I being any integer greater than or equal to 1 and less than or equal to K. Optionally, the M candidate interference groups can also comprise at least one of the following: the first beam and I second beams of the K second beams have less strong interference, the first beam and I second beams of the K second beams have less less strong interference, and so on.

[0035] In a possible design, M is an integer greater than or equal to 2, and the first candidate interference group is one of the M candidate interference groups other than the candidate interference group with the smallest interference intensity. For example, the first candidate interference group can be the candidate interference group with the largest interference intensity among the M candidate interference groups, for example, the candidate interference group with the first beam and I second beams of the K second beams having strong interference in the above design.

[0036] In a possible design, the first information further comprises information of the second SSB of the second network device and a decision parameter of the first candidate interference group. Optionally, the information of the second SSB of the second network device and the decision parameter of the first candidate interference group can be used by the first terminal device to determine whether it belongs to the first candidate interference group.

[0037] In a possible design, the first information further includes a first time delay corresponding to the first candidate interference group, based on which the first network device sends, to the first terminal device, a random access response according to the first transmission resource. Specifically, the first network device can send, to the first terminal device, the random access response according to the first transmission resource after a first time delay after receiving the random access request from the first terminal device.

[0038] In a possible design, the first network device can further send, to the second network device, second information, where the second information is used to indicate that the first network device uses the first transmission resource. Optionally, the second information can be further used to indicate that the second network device does not use the first transmission resource. Alternatively, the second information can be further used to indicate that the second network device uses a second transmission resource that is orthogonal to the first transmission resource.

[0039] With the above design, the second network device can learn, according to the second information, that the first network device will use the first transmission resource, and therefore, the second network device can use the second transmission resource that is orthogonal to the first transmission resource. In this way, the first terminal device can perform random access with the first network device using the first transmission resource without being affected by the downlink data sent by the second network device, thereby avoiding the phenomenon of access failure when the first terminal device accesses the first network device.

[0040] In a further possible design, the second information further includes location information of the first terminal device. Optionally, the location information of the first terminal device can be used by the second network device to use the second transmission resource that is orthogonal to the first transmission resource in an area corresponding to the location information.

[0041] With the above design, the second network device can learn the location information of the first terminal device that causes interference, so that the second network device can perform interference avoidance in a smaller and more accurate range according to the location information of the first terminal device, while the first transmission resource can still be used in other areas, to improve the multiplexing rate of the first transmission resource.

[0042] In a further possible design, the location information of the first terminal device can be determined according to at least one of the following: a second SSB associated with the random access request, time delay information of the random access request, a wave position associated with the random access request, or location information carried in the random access request sent by the first terminal device. For example, when the first network device is a ground base station, the location information of the first terminal device can be determined according to the second SSB associated with the random access request and the time delay information of the random access request. When the first network device is a satellite base station, the location information of the first terminal device can be determined according to the second SSB associated with the random access request and the wave position associated with the random access request, or can be determined according to the location information carried in the random access request sent by the first terminal device.

[0043] Through the above design, the second SSB associated with the random access request and the delay information of the random access request, and other configuration information such as the wave position associated with the random access request and the position information reported by the first terminal device itself, can be combined to accurately locate the position of the first terminal device. The more information combined, the higher the accuracy of the positioning.

[0044] In a possible design, the first transmission resource is configured based on a period or on demand.

[0045] Through the above design, the first transmission resource is configured on demand, which can meet different scene requirements. The first transmission resource is configured periodically, which can realize periodic allocation and continuous updating of the first transmission resource, and can more effectively utilize resources.

[0046] In a possible design, the number of the first transmission resource is related to the number of the first type of terminal device and the number of the second type of terminal device. The first type of terminal device is a terminal device served by the first network device and interfered by the second network device. The second type of terminal device is a terminal device associated with the first type of terminal device and served by the second network device. Optionally, the number of the first transmission resource can be configured in proportion or according to other algorithms. For example, in the case of proportional configuration, the number of the first transmission resource can satisfy the following formula: Or, Wherein, N TN is the number of the first type of terminal device, N NTN is the number of the second type of terminal device, a is the first weight, b is the second weight, the values of a and b are both real numbers greater than 0 and less than 1, and the sum of the values of a and b is 1.

[0047] Through the above design, the first transmission resource can be allocated and updated according to the number of terminal devices to match the constantly changing load state, so that the first transmission resource always remains accurate.

[0048] In a possible design, the first transmission resource and the second transmission resource of the second network device satisfy at least one of the following conditions: no overlap in time domain, no overlap in frequency domain, or different polarization modes.

[0049] In a possible design, the first information further includes second random access configuration information of a second candidate interference group. The second candidate interference group belongs to one of the M candidate interference groups different from the first candidate interference group. Based on this, if the first network device determines that the random access request is related to the second random access configuration information, the first network device can send a random access response to the first terminal device.

[0050] In a further possible design, the second candidate interference group has a lower interference strength than the first candidate interference group.

[0051] In a further possible design, when the second candidate interference group is one of the M candidate interference groups other than the one with the strongest interference, such as the one in which the first beam and I of the K second beams are the I-th strongest interferers or the I-th second strongest interferers, the first network device can use enhanced coverage techniques to send the random access response to the first terminal device, such as sending the random access response to the first terminal device multiple times, or sending the random access response to the first terminal device using a lower code rate, and the like. When the second candidate interference group is the one of the M candidate interference groups with the weakest interference, such as the one in which the first beam and the K second beams have no interference, the first network device can send the random access response to the first terminal device according to an existing random access procedure (such as a 4-step random access or a 2-step random access).

[0052] With the above design, different interference strategies can be used for different degrees of interference, such as using dedicated resources for interference avoidance for candidate interference groups with very high degrees of interference, using enhanced coverage techniques for interference avoidance for candidate interference groups with relatively low degrees of interference, and not performing interference avoidance for candidate interference groups with no interference or very low degrees of interference, to improve the flexibility of interference avoidance.

[0053] In a further possible design, the first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, grouping of random access occasions, or configuration information of random access occasions.

[0054] In a possible design, the first transmission resource includes a downlink transmission resource.

[0055] In a possible design, the first information is carried in a SIB.

[0056] In a third aspect, a communication method is provided. The method can be applied to a network side, such as a second network device or a component (e.g., a circuit, a processor, a chip, or a chip system) in the second network device, to perform. Taking the second network device as an example, the method includes: receiving, by the second network device, second information from a first network device, and sending, by the second network device, downlink data to a second terminal device using a second transmission resource according to the second information; wherein the second information is used to indicate that the first network device uses a first transmission resource of a first candidate interference group, and the second transmission resource is orthogonal to the first transmission resource.

[0057] By the above method, the second network device can learn, according to the second information, that the first network device will use the first transmission resource, and thus the second network device can use the second transmission resource which is orthogonal to the first transmission resource. In this way, the first terminal device uses the first transmission resource to perform random access with the first network device, and can not be affected by the downlink data sent by the second network device, thereby avoiding the phenomenon of access failure when the first terminal device accesses the first network device.

[0058] In a possible design, the second network device sends, to the second terminal device, the downlink data using the second transmission resource within a coverage range of the second network device, or within a coverage range of a beam associated with the first candidate interference group.

[0059] By the above method, the second network device uses the orthogonal second transmission resource within the entire coverage range, and can avoid causing interference to the process of the first terminal device accessing the first network device within the entire service area. The second network device uses the orthogonal second transmission resource within the coverage range of the beam associated with the first candidate interference group, and can avoid using the same resource within a smaller area, and can improve the utilization of the resource.

[0060] In a possible design, the second transmission resource and the first transmission resource satisfy at least one of the following conditions: time-domain orthogonality, frequency-domain orthogonality, or polarization orthogonality.

[0061] In a possible design, the second information further includes location information of the first terminal device, and the second network device sends, to the second terminal device, the downlink data using the second transmission resource. Specifically, the second network device sends, to the second terminal device, the downlink data using the second transmission resource within an area corresponding to the location information of the first terminal device.

[0062] In a fourth aspect, a communication apparatus is provided, which can be the first terminal device described above. The communication apparatus can include a module or unit or means for performing the method described in any of the above first aspect or designs of the first aspect. For example, the communication apparatus can include a communication unit and a processing unit, the communication unit is configured to perform a transceiving operation, for example, an operation related to receiving and transmitting, and the processing unit is configured to perform a processing operation. Optionally, the communication unit can also be referred to as a transceiving unit. Alternatively, the communication unit includes a receiving unit and a transmitting unit. In a design, the communication apparatus is a communication chip, the processing unit can be one or more processors or processor cores, and the communication unit can be an input / output circuit, an input / output interface, or an antenna port of the communication chip. In another design, the communication unit can be a transmitter and a receiver, or the communication unit is a transmitter and a receiver.

[0063] For example, the communication device includes a communication unit and a processing unit. The communication unit is configured to receive first information from a first network device, the first information including first random access configuration information of a first candidate interference group and first transmission resources of the first candidate interference group, the first candidate interference group being one of M candidate interference groups, the M candidate interference groups being related to a first SSB of the first network device and a second SSB of a second network device, M being a positive integer; the processing unit is configured to determine that the first terminal device belongs to the first candidate interference group; the communication unit is further configured to send a random access request to the first network device using the first random access configuration information, and receive a random access response from the first network device according to the first transmission resources.

[0064] In a possible design, the second network device includes one or more, the second SSB of the one or more second network devices includes K, K being a positive integer, if the beam for sending the first SSB of the first network device is a first beam, and the beams for sending the K second SSBs of the one or more second network devices are K second beams, the M candidate interference groups can include at least one of the following: the first beam and the K second beams have no interference, the first beam and I second beams of the K second beams have weak interference, or the first beam and I second beams of the K second beams have strong interference, I being any integer greater than or equal to 1 and less than or equal to K. Optionally, the M candidate interference groups can further include at least one of the following: the first beam and I second beams of the K second beams have less strong interference, the first beam and I second beams of the K second beams have less less strong interference, and so on.

[0065] In a possible design, M is an integer greater than or equal to 2, and the first candidate interference group is one of the M candidate interference groups except for a candidate interference group with the minimum interference strength.

[0066] In a possible design, the first information further includes information of the second SSB of the second network device and a decision parameter of the first candidate interference group, based on which the processing unit determines that the first terminal device belongs to the first candidate interference group, which can specifically be: the processing unit determines a first reference signal receiving power of the first terminal device to the first network device according to information of the first SSB of the first network device, and determines a second reference signal receiving power of the first terminal device to the second network device according to information of the second SSB of the second network device, and if the first reference signal receiving power and the second reference signal receiving power satisfy the decision parameter, it is determined that the first terminal device belongs to the first candidate interference group.

[0067] In a further possible design, the first reference signal receiving power and the second reference signal receiving power correspond to a same receiving configuration, and the receiving configuration includes at least one of the following: a number of receiving antennas, beamforming information, or receiving polarization information.

[0068] In a possible design, the first transmission resource and the second transmission resource of the second network device satisfy at least one of the following conditions: no overlap in time domain, no overlap in frequency domain, or different polarization manners.

[0069] In a possible design, the first information further includes a first time delay corresponding to the first candidate interference group, based on which the communication unit receives a random access response from the first network device according to the first transmission resource. Specifically, the communication unit receives the random access response from the first network device according to the first transmission resource after a first time delay after sending the random access request to the first network device.

[0070] In a possible design, the first information further includes second random access configuration information of a second candidate interference group, the second candidate interference group being one of the M candidate interference groups different from the first candidate interference group, based on which the processing unit is further configured to determine that the first terminal device belongs to the second candidate interference group, and the communication unit is further configured to send a random access request to the first network device using the second random access configuration information, and receive a random access response from the first network device.

[0071] In a further possible design, the interference strength of the second candidate interference group is lower than the interference strength of the first candidate interference group.

[0072] In a further possible design, the first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, random access occasion grouping, or random access occasion configuration information.

[0073] In a possible design, the first transmission resource includes a downlink transmission resource.

[0074] In a possible design, the first information is carried in a SIB.

[0075] In a fifth aspect, a communication apparatus is provided, which can be the first network device described above. The communication apparatus can include a module or unit or means for performing the method described in the second aspect or any possible design of the second aspect. For example, the communication apparatus can include a communication unit configured to perform operations related to receiving and transmitting, and a processing unit configured to perform processing operations. Optionally, the communication unit can also be referred to as a transceiver. Alternatively, the communication unit includes a receiver and a transmitter. In one design, the communication apparatus is a communication chip, the processing unit can be one or more processors or processor cores, and the communication unit can be an input / output circuit, an input / output interface, or an antenna port of the communication chip. In another design, the communication unit can be a transmitter and a receiver, or the communication unit can be a transmitter and a receiver.

[0076] For example, the communication device includes a communication unit and a processing unit. The communication unit is configured to send first information to the first terminal device and receive a random access request from the first terminal device. The first information includes first random access configuration information of a first candidate interference group and a first transmission resource of the first candidate interference group. The first candidate interference group is one of M candidate interference groups. The M candidate interference groups are related to a first SSB of the first network device and a second SSB of the second network device. M is a positive integer. The processing unit is configured to determine that the random access request is related to the first random access configuration information. The communication unit is further configured to send a random access response to the first terminal device according to the first transmission resource.

[0077] In a possible design, the second network device includes one or more, and the second SSB of the one or more second network devices includes K, where K is a positive integer. If the beam of the first network device sending the first SSB is a first beam, and the beams of the one or more second network devices sending the K second SSBs are K second beams, the M candidate interference groups can include at least one of the following: the first beam and the K second beams have no interference, the first beam and I second beams of the K second beams have weak interference, or the first beam and I second beams of the K second beams have strong interference, where I is any integer greater than or equal to 1 and less than or equal to K. Optionally, the M candidate interference groups can further include at least one of the following: the first beam and I second beams of the K second beams have secondary strong interference, the first beam and I second beams of the K second beams have tertiary strong interference, and so on.

[0078] In a possible design, M is an integer greater than or equal to 2, and the first candidate interference group is one of the M candidate interference groups except for a candidate interference group with the minimum interference strength.

[0079] In a possible design, the first information further includes information of the second SSB of the second network device and a decision parameter of the first candidate interference group. Optionally, the information of the second SSB of the second network device and the decision parameter of the first candidate interference group are used by the first terminal device to determine whether the first terminal device belongs to the first candidate interference group.

[0080] In a possible design, the first information further includes a first time delay corresponding to the first candidate interference group. Based on this, the communication unit sends a random access response to the first terminal device according to the first transmission resource. Specifically, the communication unit can send the random access response to the first terminal device according to the first transmission resource after a first time delay after receiving the random access request from the first terminal device.

[0081] In a possible design, the communication unit is further configured to send second information to the second network device, where the second information is used to indicate that the first network device uses the first transmission resource. Optionally, the second information can also be used to indicate that the second network device does not use the first transmission resource. Alternatively, the second information can also be used to indicate that the second network device uses a second transmission resource that is orthogonal to the first transmission resource.

[0082] In a further possible design, the second information further includes location information of the first terminal device. Optionally, the location information of the first terminal device can be used by the second network device to use the second transmission resource that is orthogonal to the first transmission resource in an area corresponding to the location information.

[0083] In a further possible design, the location information of the first terminal device can be determined according to at least one of the following: a second SSB associated with the random access request, delay information of the random access request, a wave position associated with the random access request, or location information carried in the random access request by the first terminal device.

[0084] In a possible design, the first transmission resource is based on a periodic configuration or an on-demand configuration.

[0085] In a possible design, the number of the first transmission resource is related to the number of first type terminal devices and the number of second type terminal devices, where the first type terminal devices are terminal devices served by the first network device and interfered by the second network device, and the second type terminal devices are terminal devices served by the second network device and associated with the first type terminal devices. Optionally, the number of the first transmission resource can be configured in proportion or according to other algorithms. For example, in the case of proportional configuration, the number of the first transmission resource can satisfy the following formula: or where N TN is the number of the first type terminal devices, N NTN is the number of the second type terminal devices, a is a first weight, b is a second weight, the values of a and b are real numbers greater than 0 and less than 1, and the sum of the values of a and b is 1.

[0086] In a possible design, the first transmission resource and the second transmission resource of the second network device satisfy at least one of the following conditions: no overlap in time domain, no overlap in frequency domain, or different polarization manners.

[0087] In a possible design, the first information further includes second random access configuration information of a second candidate interference group, the second candidate interference group being one of the M candidate interference groups other than the first candidate interference group. Based on this, the processing unit is further configured to determine that the random access request is related to the second random access configuration information, and the communication unit is further configured to send, to the first terminal device, the random access response.

[0088] In a further possible design, the second candidate interference group has a lower interference strength than the first candidate interference group.

[0089] In a further possible design, when the second candidate interference group is one of the M candidate interference groups other than the candidate interference group with the maximum interference strength, the communication unit can send, to the first terminal device, the random access response using an enhanced coverage technique, such as sending the random access response to the first terminal device multiple times, or sending the random access response to the first terminal device using a lower code rate, etc. When the second candidate interference group is the candidate interference group with the minimum interference strength among the M candidate interference groups, the communication unit can send, to the first terminal device, the random access response according to an existing random access procedure.

[0090] In a further possible design, the first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, random access occasion grouping, or random access occasion configuration information.

[0091] In a possible design, the first transmission resource includes a downlink transmission resource.

[0092] In a possible design, the first information is carried in a SIB.

[0093] In a sixth aspect, the present application provides a communication apparatus, which can be the second network device described above. The communication apparatus can include a module or unit or means for performing the method described in the third aspect or any of the designs of the third aspect. For example, the communication apparatus can include a communication unit and a processing unit, the communication unit being configured to perform operations related to receiving and sending, such as transceiving operations, and the processing unit being configured to perform processing operations. Optionally, the communication unit can also be referred to as a transceiving unit. Alternatively, the communication unit includes a receiving unit and a sending unit. In one design, the communication apparatus is a communication chip, the processing unit can be one or more processors or processor cores, and the communication unit can be input / output circuitry, input / output interface, or antenna port of the communication chip. In another design, the communication unit can be a transmitter and a receiver, or the communication unit is a transmitter and a receiver.

[0094] The communication device includes a communication unit and a processing unit. The communication unit is configured to receive second information from the first network device. The processing unit is configured to control the communication unit to transmit downlink data to the second terminal device using a second transmission resource according to the second information. The second information is used to indicate that the first network device uses a first transmission resource of the first candidate interference group. The second transmission resource is orthogonal to the first transmission resource.

[0095] In a possible design, the communication unit transmits the downlink data to the second terminal device using the second transmission resource. Specifically, the communication unit can transmit the downlink data to the second terminal device using the second transmission resource within a coverage range of the second network device, or within a coverage range of a beam associated with the first candidate interference group.

[0096] In a possible design, the second transmission resource and the first transmission resource satisfy at least one of the following conditions: time-domain orthogonality, frequency-domain orthogonality, or polarization orthogonality.

[0097] In a possible design, the second information further includes location information of the first terminal device. Based on the location information, the communication unit transmits the downlink data to the second terminal device using the second transmission resource. Specifically, the communication unit can transmit the downlink data to the second terminal device using the second transmission resource within an area corresponding to the location information of the first terminal device.

[0098] In a seventh aspect, a communication device is provided. The communication device can be the first terminal device, the first network device, or the second network device. The communication device can include a memory, one or more processors, and optionally, a transceiver. The memory is configured to store computer programs or instructions. The transceiver is configured to receive and send signals. The one or more processors are configured to read the computer programs or instructions in the memory, so that the communication device performs the method in any one of the first aspect to the third aspect.

[0099] In a design, the memory is one or more.

[0100] In a design, the memory can be integrated with the one or more processors, or the memory and the one or more processors can be separately arranged.

[0101] In a design, the transceiver can include a transmitter (transmitter) and a receiver (receiver).

[0102] In an eighth aspect, the present application provides a communication apparatus, which can be the first terminal device, the first network device, or the second network device. The communication apparatus can include one or more processors, and optionally, a communication interface coupled to the one or more processors. Optionally, the communication apparatus can further include a memory coupled to the one or more processors. The one or more processors can read program instructions in the memory and invoke the communication interface to communicate with other communication apparatuses to perform the method in any one of the first aspect to the third aspect.

[0103] In an implementation form, when the communication apparatus is the first terminal device, the first network device, or the second network device, the communication interface can be a transceiver, or an input / output interface. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0104] In yet another implementation form, when the communication apparatus is a chip or a chip system, the communication interface can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin, or related circuitry, etc. on the chip or the chip system. The one or more processors can also be implemented as a processing circuit or a logic circuit.

[0105] In a ninth aspect, the present application provides a communication apparatus, which includes one or more processors, and optionally, a storage medium storing instructions for execution by the one or more processors to implement the method in any one of the first aspect to the third aspect. The communication apparatus can be a chip system. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0106] In a tenth aspect, the present application provides a communication apparatus, which includes an interface circuit and a processing circuit. The interface circuit can include an input circuit and an output circuit. The processing circuit is configured to receive a signal via the input circuit, and transmit a signal via the output circuit, so that the method in any one of the first aspect to the third aspect is implemented.

[0107] In a specific implementation process, the communication apparatus can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, and various logic circuits, etc. The input signal received by the input circuit can be received and input by, for example but not limited to, a receiver, the output signal output by the output circuit can be output to and transmitted by, for example but not limited to, a transmitter, and the input circuit and the output circuit can be the same circuit which is used as the input circuit and the output circuit at different times. The present application does not limit the specific implementation of the one or more processors and various circuits.

[0108] In an implementation, when the communication apparatus is the first terminal device, the first network device or the second network device, the interface circuit can be a radio frequency processing chip in the first terminal device, the first network device or the second network device, and the processing circuit can be a baseband processing chip in the first terminal device, the first network device or the second network device.

[0109] In yet another implementation, the communication apparatus can be a part of a device in the first terminal device, the first network device or the second network device, such as a system chip or a communication chip. The interface circuit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuit on the chip or the chip system. The processing circuit can be a logic circuit on the chip.

[0110] In an eleventh aspect, the present application provides a communication system, which includes necessary network elements, such as the first network device and the second network device. The first network device is configured to execute the method provided in the second aspect, and the second network device is configured to execute the method provided in the third aspect.

[0111] Optionally, the communication system can further include the first terminal device, which is configured to execute the method provided in the first aspect.

[0112] In a twelfth aspect, the present application provides a computer program product, which includes a computer program (also referred to as code or instructions). When a computer reads and executes the computer program product, the computer is caused to execute the method provided in any one of the first aspect to the third aspect. Optionally, the computer can be a communication apparatus, such as the first terminal device, the first network device or the second network device.

[0113] In a thirteenth aspect, the present application provides a computer readable storage medium, which stores a computer program or instructions. When the computer program or instructions are executed on a computer, the method provided in any one of the first aspect to the third aspect is implemented. Optionally, the computer can be a communication apparatus, such as the first terminal device, the first network device or the second network device.

[0114] In a fourteenth aspect, the present application provides a chip, which is configured to read a computer program stored in a memory and execute the method provided in any one of the first aspect to the ninth aspect. Optionally, the chip can include at least one processor, which is coupled with the memory and configured to read the computer program stored in the memory and implement the method provided in the above embodiments. Optionally, the chip can further include a memory, a communication interface, a power supply module and the like. The memory is configured to store the computer program. The communication interface is configured to receive and send data. The power supply unit is configured to supply power to the at least one processor.

[0115] In a fifteenth aspect, the present application provides a chip system, which comprises at least one processor configured to support a computer device to implement the method provided in any one of the first aspect to the third aspect. In a possible design, the chip system further comprises a memory configured to store programs and data necessary for the computer device. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0116] The technical effects achieved by the second aspect to the fifteenth aspect can be referred to the description of beneficial effects of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0117] FIG. 1a exemplarily shows a schematic diagram of an association relationship between SSBs and beams of a ground base station;

[0118] FIG. 1b exemplarily shows a schematic diagram of an association relationship between SSBs and beams of a satellite base station;

[0119] FIG. 2a exemplarily shows a schematic diagram of an architecture of a communication system provided by the present application;

[0120] FIG. 2b exemplarily shows a schematic diagram of an architecture of an NTN communication system provided by the present application;

[0121] FIG. 2c exemplarily shows a schematic diagram of an architecture of a 5G satellite communication system provided by the present application;

[0122] FIG. 3 exemplarily shows a schematic diagram of a scenario of satellite-ground interference provided by the present application;

[0123] FIG. 4 exemplarily shows a schematic diagram of a flow of a communication method provided by embodiment one;

[0124] FIG. 5 exemplarily shows a schematic diagram of another communication method provided by embodiment one;

[0125] FIG. 6 exemplarily shows a schematic diagram of a location area of a terminal device provided by embodiment one;

[0126] FIG. 7 exemplarily shows a schematic diagram of a flow of a communication method provided by embodiment two;

[0127] FIG. 8 exemplarily shows a schematic diagram of a structure of a communication apparatus provided by the present application;

[0128] FIG. 9 exemplarily shows a schematic diagram of another communication apparatus provided by the present application. DETAILED DESCRIPTION

[0129] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0130] The following explains some terms used in the present application. It should be noted that these explanations are for the convenience of those skilled in the art and do not limit the scope of protection required by the present application.

[0131] (1) Transmission resource.

[0132] The transmission resource (for example, the first transmission resource or the second transmission resource involved later) in the present application may, for example, include at least one of a time domain resource or a frequency domain resource.

[0133] The time domain resource may, for example, include at least one of a radio frame, a subframe, a slot, a mini slot, or an orthogonal frequency division multiplexing (OFDM) symbol. One radio frame may, for example, include a plurality of subframes, one subframe may, for example, include one or more slots, and one slot may, for example, include at least one symbol.

[0134] The frequency domain resource may, for example, include at least one of a resource element (RE), a resource block (RB), a channel, a sub channel, a carrier, or a bandwidth part (BWP). The channel may, for example, be equivalent to a resource block set (RB set), and the frequency domain bandwidth of one RB set is usually 20 megahertz (MHz).

[0135] (2) SSB.

[0136] The synchronization signal block (SSB) is generally transmitted together with the main information block (MIB) on the physical broadcast channel (PBCH) to form an SS / PBCH block. The SSB described below may, for example, refer to the SS / PBCH block. The synchronization signal may, for example, be used by the terminal to perform downlink synchronization and obtain the identity (ID) of the cell. The downlink synchronization may, for example, include frequency synchronization and time synchronization. The PBCH may, for example, be used by the terminal to obtain information of the accessed cell.

[0137] (3) Relationship between SSB and beam.

[0138] Network devices can use multiple antennas to enhance coverage, but using multiple antennas can result in very narrow beams of antenna radiation, and a single narrow beam is difficult to cover the entire cell. At the same time, due to hardware limitations, network devices often cannot simultaneously transmit signals through multiple beams to cover the entire cell, therefore, the communication system introduces beam scanning technology, that is, network devices can transmit signals through different beams at different times. Therefore, the communication system introduces a method of covering the entire cell through beam scanning, that is, network devices can cover part of the area of the cell through part of the beams at a certain time, and then cover another part of the area of the cell through another part of the beams at another time.

[0139] Referring to FIG. 1a, when the network device is a network device on the ground (referred to as a ground base station), the service cell of the ground base station appears as a circle or an ellipse. The ground base station will select a range of beams to communicate at each time, each beam can be generated by a single directional antenna or by a combination of multiple antennas. Each beam corresponds to a sector area, and different sector areas transmit different SSBs. For example, the service cell of the ground base station shown in FIG. 1a is divided into 8 sector areas, and SSB#0-SSB#7 are transmitted in turn.

[0140] Referring to FIG. 1b, when the network device is a network device on a satellite (referred to as a satellite base station), the satellite base station transmits a beam in a certain direction on the ground at a certain time, and covers the entire cell by transmitting beams in different directions at multiple times. Specifically, the satellite base station covers the entire cell by beam 0 (used to transmit SSB#0), beam 1 (used to transmit SSB#1), …, beam N-1 (used to transmit SSB#N-1), and beam N (used to transmit SSB#N). As can be seen, the directions of any two beams can be different, and the two SSBs transmitted by any two beams are also different.

[0141] (4) Wave position.

[0142] The wave position refers to the signal strength and direction of the radio wave received by the receiving end. For example, when the transmitting end is a network device and the receiving end is a terminal device, the wave position refers to the strength and direction of the downlink signal transmitted by the network device and received by the terminal device.

[0143] (5) Random access.

[0144] Before accessing the network device, the terminal device needs to perform cell search. For example, when the terminal device is turned off and then turned on, cell search can be performed. The purpose of cell search is to enable the terminal device to obtain time synchronization and frequency synchronization of the system, so that the terminal device can read system information (for example, information of the cell to be accessed, system bandwidth, and other cell broadcast information, etc.) and perform subsequent data transmission.

[0145] After that, the terminal device can perform random access. Random access is a process of obtaining uplink synchronization between the terminal device and the network device initiated by the terminal device after the terminal device and the network device obtain downlink synchronization. Random access can be divided into contention-based random access (also known as 4-step random access) and contention-free random access (also known as 2-step random access).

[0146] (6) Resources for random access.

[0147] The random access request is transmitted on a physical random access channel occasion (RO), and one RO is understood as one random access resource. The terminal device can send a random access preamble sequence on a specific RO (i.e., on a specific time-frequency resource). The random access preamble sequence can also be referred to as a preamble, a random access preamble, or a preamble sequence, etc. The format of the RO can correspond to the format of the preamble sequence.

[0148] In the existing standard (3GPP TS 38.331), the configuration information of the RO and the preamble sequence for random access is indicated by a system message, for example, it can be configured by random access channel (RACH)-ConfigCommon. For example, the parameter rach-ConfigGeneric in RACH-ConfigCommon indicates physical random access channel (PRACH) sequence generation related information, which can include root indication, frequency division multiplexing (FDM) number (number of frequency domain ROs), and frequency domain location information, etc. RACH-ConfigCommon can also include information such as the association relationship between SSB and RO.

[0149] The foregoing introduces some terms involved in the present application, and the following introduces possible application scenarios of the present application.

[0150] The communication method provided in the present application can be applied to various communication systems, for example, a satellite communication system, a high altitude platform station (HAPS) communication system, a non-terrestrial network (NTN) system such as a drone, etc.; for example, an integrated communication and navigation (IcaN) system, a global navigation satellite system (GNSS), and an ultra-dense low-orbit satellite communication system, etc. The communication system to which the present application is applied can be integrated with a ground communication system. The ground communication system may, for example, include but is not limited to: a narrow band-internet of things (NB-IoT), a 4th generation (4G) communication system (for example, a long term evolution (LTE) system), a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) communication system (for example, a new radio (NR) system, an enhanced mobile broadband (eMBB) technology, an ultra-reliable and low-latency communications (URLLC) technology, an enhanced machine-type communication (eMTC) technology), and a 6th generation (6G) communication system, etc.

[0151] For example, refer to FIG. 2a, which shows an exemplary schematic diagram of an architecture of a communication system. The communication system can include at least one network device (e.g., 110a, 110b in FIG. 2a) and at least one terminal device (e.g., 120a, 120b, 120c, 120d, 120e, 120f in FIG. 2a). It should be understood that more or fewer network devices or terminal devices can be included in the communication system. The network device or the terminal device can be hardware, software functionally divided, or a combination of the two. As shown in FIG. 2a, the network device 110a can send downlink data to the terminal device 120a, the terminal device 120b, and the terminal device 120c, and can receive uplink data sent by the terminal device 120a, the terminal device 120b, and the terminal device 120c. Of course, the terminal device 120a, the terminal device 120b, and the terminal device 120c can also send uplink data to the network device 110a, and can receive downlink data sent by the network device 110a. The network device and the terminal device can communicate through other devices or network elements, for example, the network device 110a can send downlink data to the terminal device 120d through the network device 110b. In addition, the terminal device 120d, the terminal device 120e, and the terminal device 120f can also form a communication system; for example, the terminal device 120d can send data to the terminal device 120e or the terminal device 120f.

[0152] In the embodiments of the present application, the network device is a device deployed in a radio access network (RAN) to provide wireless communication functions for terminal devices, which can also be referred to as a base station, and can also be referred to as a RAN node (or device). The network device can include various forms of macro base stations, micro base stations (also known as small stations), relay stations, or access points, etc. For example, some examples of access network devices are: evolved node B (eNB or eNodeB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB or home Node B, HNB), baseband unit (BBU), access point (AP) in a wireless fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission reception point (TRP), satellite, unmanned aerial vehicle, etc. The network device can also be a base station (gNB) or TRP or TP in a 5G system, or one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system. In addition, the network device can also be a network node constituting a gNB or a TP, such as a BBU, or a distributed unit (DU), etc. Alternatively, the network device can also be a device in a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), a vehicle-to-vehicle communication system, or other communication systems that undertakes a network side function. The network device can also be a next-generation base station in a 6th generation (6G) mobile communication system, or a base station in a future mobile communication system. In communication systems using different wireless access technologies, the names of devices with network device functions may vary, and the embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0153] In one possible scenario, a base station includes a baseband unit (BBU) and a remote radio unit (RRU). The BBU and RRU can be placed in different locations, for example, the RRU is remotely placed in a high traffic area, and the BBU is placed in a central machine room. The BBU and RRU can also be placed in the same machine room. The BBU and RRU can also be different components under one rack.

[0154] In another possible scenario, a terminal is assisted by multiple RAN nodes to implement wireless access, and different RAN nodes respectively implement part of functions of a base station. For example, a RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can be included in the same network element, for example, in a BBU. The RU can be included in a radio frequency device or a radio frequency unit, for example, included in a remote radio unit RRU, an active antenna processing unit AAU, or a remote radio head RRH.

[0155] In the embodiments of the present application, the terminal device can also be referred to as a user equipment (UE), a mobile station (MS), a mobile terminal (MT), an access terminal, a subscriber unit, a user station, a mobile station, a mobile terminal, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device, etc., which is a device providing voice or data connectivity to a user, and can also be an Internet of Things device. For example, the terminal device includes a handset, a vehicle-mounted device, a wearable device, a computer device, or other processing devices connected to a wireless modem (modem), etc. Currently, some examples of the terminal device can be: a mobile phone, a smart phone, a cellular phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, a notebook computer, a palm computer, a laptop computer, a machine type communication (MTC) terminal, a mobile internet device (MID), a wearable device (such as a smart watch, a smart bracelet, a pedometer, etc.), a vehicle-mounted device (such as a car, a bicycle, an electric vehicle, an airplane, a ship, a train, a high-speed rail, etc.), a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a smart home device (such as a refrigerator, a television, an air conditioner, an electric meter, etc.), a smart robot, a workshop device, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, or a wireless terminal in smart home, a flight device (such as a smart robot, a hot air balloon, a drone, an airplane), etc. The terminal device can also be other devices with terminal functions, for example, the terminal device can also be a device with terminal functions in D2D communication.

[0156] Based on the description of the communication system architecture shown in FIG. 2a, the embodiments of the present application are applied to a non-terrestrial network (NTN) communication system. The NTN communication system includes nodes such as satellite networks, high-altitude platforms, and unmanned aerial vehicles. Taking satellite communication as an example, as shown in FIG. 2b, the NTN communication system includes a satellite 201 and a terminal device 202. The explanation of the terminal device 202 can refer to the related description of the terminal device described above. The satellite 201 can also be referred to as a high-altitude platform, a high-altitude aircraft, or a satellite base station. In terms of the relationship between the NTN communication system and the ground communication system, the satellite 201 can be regarded as one or more network devices in the ground communication system architecture. The satellite 201 provides communication services to the terminal device 202, and the satellite 201 can also be connected to a core network device. The structure and functions of the satellite 201 can also refer to the description of the network device described above. The communication mode between the satellite 201 and the terminal device 202 can also refer to the description in FIG. 2a described above. Herein, no further description is given.

[0157] Taking 5G as an example, a system architecture of 5G satellite communication is shown in FIG. 2c. The satellite mobile communication system includes 2 terminal devices (which can be simply referred to as terminals), 2 satellite base stations (2 5G base stations shown in FIG. 2c, which are deployed on satellites), a ground station (also referred to as a ground base station), and a 5G core network. Among them, the satellite base station and the terminal device can communicate through 5G new air interface. The 2 satellite base stations can communicate through Xn interface. The satellite base station is connected with the ground station through NG interface. The ground station is connected with the core network through NG interface, which can be in wired form or wireless form. When the NG interface is in wireless form, the satellite base station is connected with the ground core network through a wireless link. The satellite can usually form multiple beams, and each beam is similar to a cell / sector in a ground mobile communication system (such as LTE / NR).

[0158] 5G base station: mainly used to provide wireless access services, schedule wireless resources to access terminal devices, provide reliable wireless transmission protocols and data encryption protocols, etc.

[0159] 5G core network: mainly used to provide user access control, mobility management, session management, user security authentication, charging and other functions. It has multiple functional units and can be divided into control plane and user plane functional entities. Among them, the control plane functional entities (or network elements) include access and mobility management function (AMF) and session management function (SMF). The AMF is used to manage user access, security authentication, and mobility management. The SMF is used to manage the session of the terminal device (including the establishment, modification and release of the session), the selection and reselection of the user plane functional network element, the IP address allocation of the terminal device, the QoS control, the selection of the UPF network element providing message forwarding function, etc. The user plane functional entities (or network elements) include: a user plane function (UPF) unit, which is used to manage the transmission of user plane data, traffic statistics and other functions.

[0160] Ground station: mainly responsible for forwarding signaling and service data between satellite base stations and the 5G core network.

[0161] 5G new radio: represents the wireless link between the terminal device and the base station.

[0162] Xn interface: represents the interface between the 5G satellite base station and the 5G satellite base station, mainly used to complete the signaling interaction and user data transmission between the 5G satellite base station and the 5G satellite base station, such as handover satellite signaling interaction.

[0163] NG interface: represents the interface between the 5G base station and the 5G core network, or the interface between the ground station and the core network, or the interface between the satellite base station and the ground station (at this time the interface is a wireless link), mainly to interact with the core network non-sccess stratum (NAS) signaling and user service data.

[0164] The above satellite 201 can be a stationary satellite, a non-stationary satellite, a man-made satellite, a low-orbit satellite, a medium-orbit satellite, and a high-orbit satellite, etc. The present application does not specifically limit it.

[0165] The 3rd generation partnership project (3GPP) NR R17 version has begun to discuss the problem of adjacent channel coexistence between terrestrial communication systems and satellite communication systems, which means that future terminal devices can connect to both terrestrial base stations and satellite base stations. In order to ensure the normal communication of the terminal, the interference of the terrestrial base station to the communication between the satellite base station and the terminal device, or the interference of the satellite base station to the communication between the terrestrial base station and the terminal device needs to be considered. In order to remove the interference, the satellite base station spectrum of the low frequency band (such as S band) and the cellular spectrum of the terrestrial base station are currently defined in the standard to use adjacent channels, and by constraining the radio frequency index requirements of the transceiver end, the satellite base station and the terrestrial base station are placed in a different frequency coexistence scenario, thereby limiting the interference of the adjacent channel, so that the throughput performance of the satellite base station and the terrestrial base station is not seriously affected. The low frequency band has lower link loss and is more suitable for supporting terminal devices to directly connect to satellite base stations or terrestrial base stations, but the spectrum of the low frequency band is also very scarce. According to the current standard indication, the different frequency coexistence scheme cannot fully utilize the spectrum of the low frequency band. In order to improve the system capacity, it is necessary to consider that the satellite base station and the terrestrial base station share the spectrum of the low frequency band, which is referred to as satellite-terrestrial spectrum sharing.

[0166] In satellite-terrestrial spectrum sharing, the satellite base station and the terrestrial base station will use the same frequency band for coverage. In this case, if the coverage areas of the satellite base station and the terrestrial base station overlap, interference will occur between the signals transmitted by the satellite base station to the terminal devices in the overlapping range and the signals transmitted by the terrestrial base station to the terminal devices in the overlapping range. For example, as shown in FIG. 3, UE1 and UE2 are just in the overlapping range of the satellite base station and the terrestrial base station, UE1 accesses the terrestrial base station, and UE2 accesses the satellite base station. Therefore, UE2 will be interfered by the signal transmitted by the terrestrial base station to UE1 in the process of receiving the signal from the satellite base station, or UE1 will be interfered by the signal transmitted by the satellite base station to UE2 in the process of receiving the signal from the terrestrial base station. Therefore, it is necessary to measure and avoid the interference between the downlink transmission of the satellite base station to the terminal devices in the coverage range and the downlink transmission of the terrestrial base station to the terminal devices in the coverage range.

[0167] In order to perform interference measurement and avoidance, a reference signal for estimating interference level is defined in the current NR standard, which is called channel status information reference signal for interference measurement (CSI-IM). The CSI-IM is a zero-power channel status information reference signal, and the base station does not send any signal on the CSI-IM resource, while the base station of the neighboring cell carries information at the position corresponding to the CSI-IM resource, so that the terminal device can obtain the interference signal strength of the base station of the neighboring cell by statistically receiving the signal strength on the CSI-IM resource. However, the configuration information of the CSI-IM is indicated in the radio resource control (RRC) signaling, that is, the current interference measurement method needs to be performed in the RRC connected state. However, during the random access process, there will still be interference between the ground base station and the satellite base station, which will affect the terminal device in the overlapping range to access the satellite base station or the ground base station, and even cause access failure.

[0168] Based on this, the present application proposes a communication method to solve the problem of interference suffered by the terminal device in the overlapping range of the satellite base station and the ground base station when accessing the satellite base station or the ground base station in the satellite-ground spectrum sharing scenario, and to reduce the probability of access failure.

[0169] The communication method proposed by the embodiments of the present application will be described in detail below in combination with specific drawings.

[0170] In the following technical solutions, the ground base station in the ground communication system and the satellite base station in the satellite communication system are regarded as network devices. The device for realizing the function of the network device can be the network device, or a device capable of supporting the network device to realize the function, such as a processor, a chip or a chip system, which can be installed in the network device. In the following technical solutions, the device for realizing the function of the network device is taken as an example to describe the technical solutions provided by the embodiments of the present application.

[0171] In the following technical solutions, the device for realizing the function of the terminal device can be the terminal device, or a device capable of supporting the terminal device to realize the function, such as a processor, a chip or a chip system, which can be installed in the terminal device. In the following technical solutions, the device for realizing the function of the terminal device is taken as an example to describe the technical solutions provided by the embodiments of the present application.

[0172] Embodiment one

[0173] Please refer to FIG. 4, which is a flowchart of a communication method provided by the first embodiment, the method involving a first terminal device, a first network device and a second network device. The first terminal device can be the terminal device in FIG. 2a, FIG. 2b or FIG. 2c or a chip system inside the terminal device. The first network device and the second network device can be the network device in FIG. 2a, FIG. 2b or FIG. 2c or a chip system inside the network device. When the method is applied to a terrestrial-satellite coexistence communication system, the first network device is a terrestrial base station and the second network device is a satellite base station, and the first terminal device is located in the coverage area of the terrestrial base station, or the first network device is a satellite base station and the second network device is a terrestrial base station, and the first terminal device is located in the coverage area of the satellite base station. When the method is applied to a terrestrial communication system, the first network device and the second network device are both terrestrial base stations, and the first terminal device is located in the coverage area of the first network device. When the method is applied to a satellite communication system, the first network device and the second network device are both satellite base stations, and the first terminal device is located in the coverage area of the first network device. Of course, the solutions in the embodiments of the present application can also be directly applied to other terrestrial communication networks, satellite communication networks or other NTN communication systems or applied to other terrestrial communication networks, satellite communication networks or other NTN communication systems after being slightly modified in a manner that can be thought of by those skilled in the art, and will not be described here one by one.

[0174] As shown in FIG. 4, the method can specifically include the following steps:

[0175] Step 401: The first terminal device receives first information from the first network device, and the first information includes first random access configuration information of a first candidate interference group and first transmission resources of the first candidate interference group.

[0176] Correspondingly, the first network device transmits the first information.

[0177] Optionally, the first network device can broadcast the first information to all terminal devices in the coverage area. The first terminal device is located in the coverage area of the first network device, and thus the first terminal device can receive the first information.

[0178] Optionally, the first information can be carried in an SIB. That is to say, the first network device can carry the first information in an SIB and can broadcast the SIB to all terminal devices in the coverage area. The first terminal device is located in the coverage area of the first network device, and thus the first terminal device can receive the SIB and can obtain the first information by analyzing the SIB.

[0179] In the embodiments of the present application, the first candidate interference group is one of M candidate interference groups, the M candidate interference groups are related to a first SSB of the first network device and a second SSB of the second network device, and M is a positive integer.

[0180] Optionally, the second network device can be understood as a network device associated with the first network device. Here, the association can mean that the first network device is interfered by data transmission of the second network device, or in other words, the coverage area of the second network device overlaps with the coverage area of the first network device. For example, taking a satellite-ground coexistence communication system as an example, if the first network device is a ground base station, the second network device can be a satellite that will pass through the coverage area of the ground base station within a period of time, and the ground base station can determine these satellites according to ephemeris information (used to describe the running track of the satellite). Alternatively, if the first network device is a satellite base station, the second network device can be a ground base station that provides services for the ground area through which the satellite base station will pass within a period of time, and the satellite base station can interact with the ground base station through an NG interface to determine these ground base stations. In other scenarios, the first network device can also determine the associated second network device through neighbor cell measurement, or the first network device can also determine the associated second network device by interacting with a core network, and the like, which will not be listed one by one here.

[0181] Further, optionally, the second network device can include one or more, and the second SSB of one second network device can include one or more. Assuming that the second SSB of one or more second network devices includes K in total, K is a positive integer, the beam in which the first network device sends the first SSB is the first beam, and the beam in which one or more second network devices send K second SSBs is the K second beam, the M candidate interference groups can include at least one of the following: the first beam weakly interferes with the K second beams, or the first beam strongly interferes with I second beams in the K second beams, I is an integer greater than or equal to 1 and less than or equal to K. Optionally, in order to further distinguish different interference levels, the M candidate interference groups can also include at least one of the following: the first beam weakly interferes with I second beams in the K second beams, the first beam weakly interferes with I second beams in the K second beams, and the like.

[0182] For ease of understanding, the following takes the candidate interference group including a weak interference group and a strong interference group as an example, and takes a few examples for illustration:

[0183] Example A1, the second network device includes 1, and the second SSB of the second network device includes 1, then the M candidate interference groups can include the following two groups: the first beam weakly interferes with the second beam, and the first beam strongly interferes with the second beam;

[0184] In example A2, the second network device includes one, and the second SSB of the second network device includes two, such as the second SSB#1 and the second SSB#2. Then, the M candidate interference groups may include the following four groups: the first beam weakly interferes with the second beam transmitting the second SSB#1 and the second beam transmitting the second SSB#2, the first beam strongly interferes with the second beam transmitting the second SSB#1, the first beam strongly interferes with the second beam transmitting the second SSB#2, and the first beam strongly interferes with the second beam transmitting the second SSB#1 and the second beam transmitting the second SSB#2.

[0185] In example A3, the second network device includes two, such as the second network device 1 and the second network device 2. The second SSB of the second network device 1 includes one, such as the second SSB#1, and the second SSB of the second network device 2 includes two, such as the second SSB#2 and the second SSB#3. Then, the M candidate interference groups may include the following eight groups: the first beam weakly interferes with the second beam transmitting the second SSB#1, the second beam transmitting the second SSB#2, and the second beam transmitting the second SSB#3; the first beam strongly interferes with the second beam transmitting the second SSB#1; the first beam strongly interferes with the second beam transmitting the second SSB#3. The second beam of B#2 strongly interferes, the first beam strongly interferes with the second beam that sends the second SSB#3, the first beam strongly interferes with the second beam that sends the second SSB#1 and the second beam that sends the second SSB#2, the first beam strongly interferes with the second beam that sends the second SSB#2 and the second beam that sends the second SSB#3, the first beam strongly interferes with the second beam that sends the second SSB#1 and the second beam that sends the second SSB#3, the first beam strongly interferes with the second beam that sends the second SSB#1, the second beam that sends the second SSB#2, and the second beam that sends the second SSB#3.

[0186] Example A4, when the candidate interference group also includes a second strongest interference group, the M candidate interference groups in the above example A1 can also include the following three groups: weak interference between the first beam and the second beam, second strongest interference between the first beam and the second beam, and strong interference between the first beam and the second beam.

[0187] The M candidate interference groups corresponding to other scenarios are similar and are not listed here one by one.

[0188] It should be noted that the above examples are only introduced based on the example that M candidate interference groups include all possible groups. In other examples, the M candidate interference groups may also include only some of the above possible groups. For example, in the above example A2, the M candidate interference groups may also include only the following three groups: the first beam strongly interferes with the second beam that transmits the second SSB#1, the first beam strongly interferes with the second beam that transmits the second SSB#2, the first beam strongly interferes with both the second beam that transmits the second SSB#1 and the second beam that transmits the second SSB#2, and does not include the group in which the first beam weakly interferes with both the second beam that transmits the second SSB#1 and the second beam that transmits the second SSB#2. For terminal devices in the groups not included, they can access the first network device according to the solution in the prior art to reduce the amount of data of the configuration information required in the first information.

[0189] According to the configuration method of the above-mentioned candidate interference group, a candidate interference group is associated with one or more second SSBs. Therefore, based on the candidate interference group to which the terminal device belongs, it can be known which second SSB the terminal device is associated with.

[0190] Optionally, M is an integer greater than or equal to 2, and the first candidate interference group may be a candidate interference group other than the candidate interference group with the smallest interference intensity among the M candidate interference groups. For example, in combination with the above configuration, the first candidate interference group may specifically be a group other than the weak interference group among the M candidate interference groups, such as the group of "strong interference between the first beam and the second beam" in the above example A1, or any one of the three groups other than "weak interference between the first beam and the second beam for transmitting the second SSB#1 and the second beam for transmitting the second SSB#2" in the above example A2, or any one of the seven groups other than "weak interference between the first beam and the second beam for transmitting the second SSB#1, the second beam for transmitting the second SSB#2, and the second beam for transmitting the second SSB#3" in the above example A3, or any one of the two groups other than "weak interference between the first beam and the second beam" in the above example A4.

[0191] Further, optionally, the first random access configuration information of the first candidate interference group can be understood as information used to indicate the resources for random access by the terminal devices in the first candidate interference group. The random access resources may include, for example, at least one of the following: a preamble sequence, an RO, or configuration information of the RO (such as a configuration index in an RO configuration information table, a frequency domain resource of the RO, etc.). The terminal devices in the first candidate interference group may initiate a random access request to the first network device on the random access resources indicated by the first random access configuration information.

[0192] Further, optionally, the first transmission resource of the first candidate interference group can comprise a downlink transmission resource, such as a downlink transmission resource configured by the first network device for the first candidate interference group. The downlink transmission resource can also be referred to as a dedicated resource, on which the first network device will feed back a random access response to a terminal device within the first candidate interference group.

[0193] Optionally, the first network device can determine the first transmission resource of the first candidate interference group through interaction with the second network device, or through interaction with a central node. The central node can be considered as a relay node between the first network device and other network devices, such as a node used to control the satellite when the first network device is a satellite.

[0194] Further, optionally, the first network device can interact with the second network device or the central node for the first transmission resource of the first candidate interference group on a periodic or on-demand basis. When configured periodically, the first network device can interact with the second network device or the central node for the first transmission resource of the first candidate interference group once every period. The length of the period can be configured by the first network device itself, or can be configured by the first network device interacting with the second network device or the central node, and the like, and is not limited in particular. When configured on-demand, the first network device can interact with the second network device or the central node for the first transmission resource of the first candidate interference group in a scenario where there is a need for interference avoidance. For example, when the interference between the first network device and the second network device is strong, or when the first network device and the second network device are close to each other, and the like, the first network device and the second network device need to interact for the first transmission resource of the first candidate interference group.

[0195] Further, optionally, the first transmission resource of the first candidate interference group can be one or more transmission resources selected from all transmission resources of the first network device. The number of first transmission resources can be proportionally configured based on the number of all transmission resources of the first network device, or can be configured based on other algorithms, and is not limited in particular.

[0196] For example, taking proportional configuration as an example, in an optional configuration, the number of first transmission resources can satisfy the following condition:

[0197] wherein N is the number of first transmission resources, N SN1 is the number of the first type of terminal devices, and N2 is the number of the second type of terminal devices. The first type of terminal devices is the terminal device of the terminal devices served by the first network device and interfered by the second network device, such as the terminal device of the terminal devices in the coverage area of the first network device and belonging to the strong interference group in the M candidate interference groups. The second type of terminal devices is the terminal device associated with the first type of terminal devices of the terminal devices served by the second network device, such as the terminal device of the terminal devices in the coverage area of the second network device and in the area where the first type of terminal devices is located. The second network device can find the terminal device whose relative position is within the set position range from all the terminal devices served by the second network device as the second type of terminal device.

[0198] In another optional configuration mode, the number of the first transmission resources can satisfy the following condition:

[0199] Wherein, a is the first weight, which can be considered as the weight corresponding to the transmission resources reserved for the first network device, the value of a is a real number greater than 0 and less than 1, the greater the value of a is, the more transmission resources are reserved for the first network device. b is the second weight, which can be considered as the weight corresponding to the transmission resources reserved for the second network device, the value of b is also a real number greater than 0 and less than 1, the greater the value of b is, the more transmission resources are reserved for the second network device.

[0200] Optionally, the sum of the values of a and b is 1. The values of a and b can be set by those skilled in the art according to experience, or can also be determined according to the actual scene. For example, in an example, assuming that the first network device is a ground base station and the second network device is a satellite, since the ground cellular can provide higher quality service, such as video call, while the satellite can only provide basic services such as voice, short message, etc. to users, therefore more transmission resources can be reserved for users of the ground cellular. That is, the value of a can be larger, and the value of b can be relatively small, such as a value of 0.8 and b value of 0.2.

[0201] It can be understood that the number of the first transmission resources can also exist in other configuration modes, which will not be listed one by one here.

[0202] Exemplarily, taking that the first network device interacts with the second network device the first transmission resource as an example, according to the configuration manner of the first transmission resource, the first network device can also interact in advance with the second network device the number of terminal devices that are interfered by each other. The first network device can configure corresponding transmission resources for each candidate interference group that exists interference with the first beam according to the number of terminal devices that are interacted. The second network device can also configure corresponding transmission resources for each candidate interference group that exists interference with the second beam based on the number of terminal devices that are interacted. In this way, the transmission resources of the candidate interference group can be allocated and updated based on the number of terminal devices, so as to more effectively utilize the transmission resources of the network device.

[0203] In step 402, the first terminal device determines that the first terminal device belongs to the first candidate interference group.

[0204] In a possible implementation, the first information can further include information of a second SSB of the second network device and a decision parameter of the first candidate interference group. The first terminal device is in the coverage area of the first network device, and therefore, the first terminal device can receive the first SSB broadcast by the first network device. The first terminal device can determine a first reference signal receiving power (RSRP) of the first network device according to the information of the first SSB of the first network device. The first terminal device can determine a second RSRP of the second network device according to the information of the second SSB of the second network device included in the first information. When the first RSRP and the second RSRP satisfy the decision parameter of the first candidate interference group included in the first information, the first terminal device can determine that it belongs to the first candidate interference group.

[0205] Exemplarily, taking the determination of the second RSRP as an example, the first terminal device can receive the second SSB according to the information of the second SSB. The second SSB includes reference signals such as a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a demodulation reference signal (DMRS), and the like. The first terminal device can determine the reception efficiency of these reference signals according to the second SSB, and take it as the second RSRP. It should be understood that the process of determining the first RSRP is similar to this, and is not repeated here.

[0206] Optionally, the first RSRP and the second RSRP correspond to a same receiving configuration. That is, the first terminal device can receive the channel sounding reference signal from the first network device and the channel sounding reference signal from the second network device under the same receiving configuration according to the information of the first SSB and the information of the second SSB. The receiving configuration can include at least one of the following parameters: the number of receiving antennas, beamforming information, or receiving polarization information. The beamforming information can include a codebook, for example. The receiving polarization information can be a receiving polarization mode, such as left polarization or right polarization. For example, the first terminal device can receive the first SSB from the first network device and the second SSB from the second network device under the same number of receiving antennas, the same codebook, and the same receiving polarization mode according to the information of the first SSB and the information of the second SSB, so that the first RSRP and the second RSRP have the same reference basis, and the accuracy of determining the candidate interference group is improved.

[0207] Further, optionally, in the first information, the decision parameter of the first candidate interference group can be a decision threshold, or a decision threshold value, or a decision range formed by the decision threshold or the decision threshold value. For example, the first terminal device can calculate the difference between the first RSRP and the second RSRP after obtaining the first RSRP and the second RSRP, for example, the value obtained by subtracting the second RSRP from the first RSRP, and then compare the difference with the decision range of the first candidate interference group. If the difference meets the decision range, it can be determined that the first terminal device belongs to the first candidate interference group.

[0208] The decision range of the first candidate interference group can be determined by one decision threshold, or by at least two decision thresholds. When the first candidate interference group is different, the number of corresponding decision thresholds is also different. For example:

[0209] When the first candidate interference group is the candidate interference group with the strongest interference degree in the M candidate interference groups, the first candidate interference group can correspond to one decision threshold, and the range smaller than the decision threshold constitutes the decision range of the first candidate interference group. For example, taking Example A1 in the above step 401 as an example, assuming that the first RSRP is RSRP1, the second RSRP is RSRP2, and the decision threshold corresponding to the group of “strong interference between the first beam and the second beam” is TH, when RSRP1-RSRP2< TH, the first terminal device can determine that it belongs to the group of “strong interference between the first beam and the second beam”;

[0210] When the first candidate interference group is the candidate interference group with the strongest non-interference degree among the M candidate interference groups, the first candidate interference group can correspond to two decision thresholds, and the range formed by the two decision thresholds is the decision range of the first candidate interference group. For example, taking Example A4 in step 401 as an example, assuming that the first RSRP is RSRP1 and the second RSRP is RSRP2, the decision threshold corresponding to the group of “second beam with second beam weak interference” includes TH1 and TH, and TH1 is greater than TH. When TH≤RSRP1-RSRP2<TH1, the first terminal device can determine that it belongs to the group of “second beam with second beam weak interference”.

[0211] It should be noted that the above content is only an example of how to determine whether the terminal device belongs to the first candidate interference group in the case that the first candidate interference group is associated with one second SSB. In other scenarios, if the first candidate interference group is associated with multiple second SSBs, the first terminal device can perform interference determination for each second SSB. When multiple second SSBs satisfy the interference determination parameter, it is determined that the first terminal device belongs to the first candidate interference group. For example, assuming that the first candidate interference group is “first beam and both second beam for transmitting second SSB#0 and second beam for transmitting second SSB#1 are strong interference” in Example A2 of step 401, the first terminal device can perform cell measurement according to the first SSB to obtain RSRP1, perform cell measurement according to the second SSB#0 to obtain RSRP 20 , and perform cell measurement according to the second SSB#1 to obtain RSRP 21 . If the first candidate interference group corresponds to one threshold TH, when RSRP1-RSRP 21 <TH and RSRP1-RSRP 22 <TH, the first terminal device can determine that it belongs to the first candidate interference group. If the first candidate interference group corresponds to two thresholds TH 20 (corresponding to the second beam for transmitting the second SSB#0) and TH 21 (corresponding to the second beam for transmitting the second SSB#1), when RSRP1-RSRP 20 <TH 20 and RSRP1-RSRP 21 <TH 21 , the first terminal device can determine that it belongs to the first candidate interference group. The related solutions related to the first candidate interference group associated with more second SSBs can be derived accordingly, which will not be listed one by one here.

[0212] In step 403, the first terminal device uses the first random access configuration information to send a random access request to the first network device.

[0213] Correspondingly, the first network device receives the random access request.

[0214] Optionally, after determining that the first terminal device belongs to the first candidate interference group, the first terminal device can send a random access request to the first network device on the resource indicated by the first random access configuration information. For example, the first terminal device can send a random access request to the first network device on the RO indicated by the first random access configuration information, and the random access request carries the preamble sequence indicated by the first random access configuration information.

[0215] Further, optionally, the first information can only include the random access configuration information of the first candidate interference group, and not include the random access configuration information of other candidate interference groups. In this case, if the first terminal device determines that it does not belong to the first candidate interference group, the first terminal device can send a random access request to the first network device in the manner of the prior art. For example, the first terminal device randomly selects a target preamble sequence from the preamble sequences indicated by the first network device, and sends a random access request to the first network device on the RO indicated by the first network device, and the random access request carries the target preamble sequence.

[0216] Further, optionally, in order to distinguish the access of the terminal devices of the first candidate interference group and other terminal devices, the random access configuration information of the first candidate interference group can be additionally configured by the first network device for the first candidate interference group. The resource corresponding to the random access information is different from the resource used for random access in the prior art. For example, when performing random access in the manner of the prior art, the RO indicated by the first network device does not include the RO indicated by the first random access configuration information, and / or the preamble sequence indicated by the first network device does not include the preamble sequence indicated by the first random access configuration information. That is, at least one of the following conditions is met: the RO indicated by the first network device in the prior access manner does not include the RO indicated by the first random access configuration information, or the preamble sequence indicated by the first network device does not include the preamble sequence indicated by the first random access configuration information. In this way, the terminal devices belonging to the first candidate interference group and the terminal devices not belonging to the first candidate interference group can use different random access configuration resources for random access, and the first network device can accurately locate the terminal devices belonging to the first candidate interference group according to the random access configuration resources used by the terminal devices, so as to perform random access response of the dedicated resource.

[0217] At step 404, the first terminal device receives a random access response from the first network device according to the first transmission resource.

[0218] Correspondingly, the first network device sends a random access response.

[0219] For example, the first network device can send a random access response to the first terminal device according to the first transmission resource.

[0220] Optionally, before sending the random access response to the first terminal device according to the first transmission resource, the first network device can first determine that the random access request sent by the first terminal device is related to the first candidate interference group. For example, the first network device can determine whether the random access request belongs to the RO or the preamble indicated by the first random access configuration information according to the RO or the preamble used by the random access request. If yes, it can be determined that the random access request is related to the first random access configuration information, and therefore the first network device can send the random access response to the first terminal device using the first transmission resource.

[0221] The first transmission resource belongs to the dedicated resource of the first candidate interference group, which can have multiple possible configuration modes, such as:

[0222] In one possible configuration mode (referred to as configuration mode one), the first transmission resource and the second transmission resource of the second network device satisfy at least one of the following conditions: time domain non-overlapping, frequency domain non-overlapping, or polarization mode different. It can be understood that the three conditions of the first transmission resource and the second transmission resource are different, or some conditions are different and others are the same. For example, the first transmission resource and the second transmission resource are different frequency resources, and correspond to different time slots and different polarization modes. For another example, the first transmission resource and the second transmission resource are different frequency resources, but correspond to the same time slot and the same polarization mode. For another example, the first transmission resource and the second transmission resource correspond to different time slots, but correspond to the same frequency band and the same polarization mode. For another example, the first transmission resource and the second transmission resource correspond to different polarization modes and different frequency bands, but correspond to the same time slot. And so on. With this configuration mode, the first transmission resource and the second transmission resource do not interfere with each other, so there is no need to interfere with the second transmission resource of the second network device, and the implementation process of interference avoidance can be simplified.

[0223] In another possible configuration mode (referred to as configuration mode two), the first transmission resource and the second transmission resource of the second network device can not satisfy the above conditions, that is, the frequency domain of the first transmission resource and the second transmission resource overlaps, the time domain overlaps and the polarization mode is the same, and the first transmission resource and the second transmission resource may interfere with each other. In this case, please refer to FIG. 5, after the first network device receives the random access request sent by the first terminal device, before sending the random access response to the first terminal device, the following steps can be included:

[0224] Step 501, the first network device sends second information to the second network device, the second information being used to indicate that the first network device uses the first transmission resource of the first candidate interference group.

[0225] Optionally, the second information can also be used to indicate that the second network device does not use the first transmission resource. Alternatively, the second information can also be used to indicate that the second network device uses a second transmission resource that is orthogonal to the first transmission resource.

[0226] At step 502, the second network device uses the second transmission resource to send downlink data to the second terminal device, and the second transmission resource is orthogonal to the first transmission resource.

[0227] Correspondingly, the second terminal device receives the downlink data sent by the second network device.

[0228] For example, the second terminal device uses the second transmission resource that is orthogonal to the first transmission resource to receive the downlink data sent by the second network device.

[0229] In this case, the second transmission resource is orthogonal to the first transmission resource, which means that the second transmission resource and the first transmission resource satisfy one or more of time domain orthogonality, frequency domain orthogonality, or polarization orthogonality. For example, the second transmission resource and the first transmission resource satisfy all of the above three conditions, i.e., time domain orthogonality, frequency domain orthogonality, and polarization orthogonality. Alternatively, the second transmission resource and the first transmission resource only satisfy one or two of the above conditions, and the other two or one condition is not satisfied. For example, the second transmission resource and the first transmission resource are time domain orthogonal, frequency domain non-orthogonal, and polarization non-orthogonal, or frequency domain orthogonal, time domain non-orthogonal, and polarization non-orthogonal, or polarization orthogonal, time domain non-orthogonal, and frequency domain non-orthogonal, or time domain orthogonal, frequency domain orthogonal, and polarization non-orthogonal, or time domain orthogonal, polarization orthogonal, and frequency domain non-orthogonal, and so on, which will not be listed one by one here.

[0230] In this case, the second terminal device can be understood as a terminal device that is within the coverage of the second network device.

[0231] Optionally, the second network device can send downlink data to the second terminal device using the second transmission resource within the coverage of the second network device or within the coverage of the beam associated with the first candidate interference group. In other words, the second network device can use the second transmission resource for all terminal devices within the coverage, or can only use the second transmission resource for terminal devices within the coverage of the beam associated with the first candidate interference group. For example, assuming that the second network device has two second SSBs, i.e., second SSB#0 and second SSB#1, according to the former manner, the second network device can use the second transmission resource for downlink transmission for terminal devices within the coverage of the second beam sending the second SSB#0 and the coverage of the second beam sending the second SSB#1 (the relationship between the SSB and the beam can be referred to FIG. 1a or FIG. 1b). According to the latter manner, if the first candidate interference group is “the first beam and the second beam sending the second SSB#0 strongly interfere with each other”, the second network device can only use the second transmission resource for downlink transmission for terminal devices within the coverage of the second beam sending the second SSB#0, and terminal devices within the coverage of the second beam sending the second SSB#1 can continue to use the first transmission resource, so as to improve the multiplexing rate of the first transmission resource.

[0232] Further, optionally, if the second beam is a beam of a satellite, the diameter of the coverage of one second beam can be up to 100 kilometers. If the second transmission resource is used for all terminal devices within the coverage, the utilization efficiency of the first transmission resource can be relatively low. In view of this, to further improve the utilization efficiency of the first transmission resource, the second information can further include the location information of the first terminal device. According to the second information, the second network device can only use the second transmission resource to send downlink data to the second terminal device within the area corresponding to the location information of the first terminal device. In other words, the second network device can only use the second transmission resource for other terminal devices within the area where the first terminal device is located. The area where the first terminal device is located can be understood as an area within a certain range around the current location of the first terminal device, such as an area within a range of 1 kilometer around the current location of the first terminal device. The area is much smaller than the coverage of one second beam with a diameter of about 100 kilometers, so that the second network device can perform interference avoidance within a smaller and more accurate range, and other areas can continue to use the first transmission resource, so as to effectively improve the utilization rate of the first transmission resource.

[0233] The position information of the first terminal device can be determined according to at least one of the following: the first SSB associated with the random access request, the second SSB associated with the random access request, the transmission delay information of the random access request, the wave position associated with the random access request, or the position information carried in the random access request sent by the first terminal device. The following examples will illustrate how to determine the position information of the first terminal device.

[0234] Example B1: The position information of the first terminal device can be determined according to the second SSB associated with the random access request. For example, the first network device can determine that the first random access request is related to the first candidate interference group according to the first random access configuration information used in the random access request, and the first candidate interference group is configured for one or more second SSBs. Therefore, the first network device can know which second SSB or second SSBs the random access request is related to according to the first random access configuration information used in the random access request. Furthermore, the first network device can determine that the first terminal device is located in the coverage range of the second beam corresponding to the second SSB or second SSBs. The first network device can indicate the information of the second SSB or second SSBs to the second network device through the second information, so that the second network device uses the second transmission resource for other terminal devices in the coverage range of the second beam corresponding to the second SSB or second SSBs.

[0235] Example B2: The position information of the first terminal device can be determined according to the first SSB associated with the random access request and the transmission delay information of the random access request. The transmission delay information of the random access request can be understood as the transmission delay between the time when the random access request reaches the first network device and the time when it falls into the RO. For example, it can be represented by the time delay between the start position of the RO where the random access request is received and the position where the preamble sequence is received. For example, the first network device is a ground base station and the second network device is a satellite base station. As shown in FIG. 1a, assuming that the entire coverage area of the ground base station is circular, the coverage range of each first beam corresponding to the first SSB corresponds to a small sector block in the circle. The ground base station can preliminarily locate the sector block where the first terminal device is located according to the first SSB associated with the random access request. Then, the ground base station can use the product of the transmission delay indicated by the transmission delay information of the random access request and the transmission speed as the approximate distance between the first terminal device and the ground base station, and find the position (presented as an arc) in the sector block that is approximately the distance away from the ground base station. After that, the ground base station can take the area within the error range (such as 100 meters) near the position as the position area of the first terminal device (as shown in FIG. 6), and can indicate the position area to the satellite base station through the second information, so that the satellite base station uses the second transmission resource for other terminal devices in the position area.

[0236] Example B3, the location information of the first terminal device can be determined according to the first SSB associated with the random access request, the second SSB associated with the random access request and the delay information of the random access request. For example, still taking the first network device as a ground base station and the second network device as a satellite base station, the ground base station can first determine the location area where the first terminal device is located according to the first SSB associated with the random access request and the delay information of the random access request in the manner shown in example B2. The location area can be within the coverage of a second beam corresponding to a second SSB of the satellite base station, or can be within the coverage of multiple second beams corresponding to multiple second SSBs of the satellite base station. Therefore, in order to enable the satellite base station to more accurately locate the first terminal device, the ground base station can further determine in which second beam corresponding to a second SSB the first terminal device is located according to the second SSB associated with the random access request in the manner shown in example B1. The ground base station can indicate the location area determined in example B2 and the second SSB determined in example B1 to the satellite base station together through the second information, so that the satellite base station can only use the second transmission resource for other terminal devices within the overlapping area of the location area and the coverage of the second beam corresponding to the second SSB. For example, if the location area is within the coverage of the second beam corresponding to the second SSB #0 and the second beam corresponding to the second SSB #1, but the associated second SSB is only the second SSB #1, the satellite base station can only use the second transmission resource for terminal devices within the range covered by the location area within the coverage of the second beam corresponding to the second SSB #1.

[0237] In example B4, the location information of the first terminal device can be determined according to the second SSB associated with the random access request and the wave position associated with the random access request. For example, taking the first network device as a satellite base station and the second network device as a ground base station, the satellite base station can divide the coverage area into multiple grids in advance according to the wave position, each grid corresponds to a terminal device group, and each terminal device group corresponds to a group of preambles (which can be pre-configured or indicated by broadcast information, for example, the broadcast information can include multiple levels of grouping, for example, grouping according to the wave position, and then further grouping each group corresponding to the wave position according to the interference, each group of preambles corresponds to a group of preambles, and of course other ways of determination are not limited). The terminal devices in each terminal device group can use the preambles in the corresponding group of preambles to send a random access request to the first network device. Based on this, the satellite base station can determine the terminal device group to which the first terminal device belongs according to the preamble used by the first terminal device to send the random access request, and further determine the wave position associated with the first terminal device. The satellite base station can also determine which second wave beam corresponding to the second SSB the first terminal device is in according to the second SSB associated with the random access request in the manner shown in example B1. The satellite base station can indicate the wave position and the associated second SSB of the first terminal device to the ground base station through the second information, so that the ground base station uses the second transmission resource for other terminal devices in the wave position associated with the first terminal device in the coverage range of the second wave beam corresponding to the second SSB.

[0238] In example B5, the location information of the first terminal device can be determined according to the location information carried by the first terminal device when sending the random access request. For example, still taking the first network device as a satellite base station and the second network device as a ground base station, the terminal devices in the coverage area of the satellite base station can also carry the location where they are when sending a random access request to the satellite base station, which can be represented by coordinates. After determining that the random access request is related to the first candidate interference group, the satellite base station can obtain the location of the first terminal device by analyzing the random access request, and can send the location to the ground base station through the second information, so that the ground base station uses the second transmission resource for other terminal devices in the location or within a certain distance around the location.

[0239] It can be understood that the above is only illustratively introduced several possible ways to determine the position information of the first terminal device, and other determination manners can also be used in actual communication process. For example, based on example B5 and example B1, the satellite base station can also indicate the associated second SSB and the position of the first terminal device to the ground base station, so that the ground base station uses the second transmission resource only for the terminal device in the coverage range of the second beam corresponding to the second SSB near the position of the first terminal device. For another example, based on example B4 and example B5, the satellite base station can also indicate the associated second SSB, the associated wave position and the position of the first terminal device to the ground base station, so that the ground base station uses the second transmission resource only for the terminal device on the associated wave position in the coverage range of the second beam corresponding to the second SSB near the position of the first terminal device. And so on, which will not be listed one by one here.

[0240] In addition, the above is only for the convenience of understanding the scheme, and the specific implementation process is introduced taking example B2 and example B3 applicable to the scenario that the first network device is a ground base station and the second network device is a satellite base station, and example B4 and example B5 applicable to the scenario that the first network device is a satellite base station and the second network device is a ground base station as examples. It should be understood that example B2 and example B3 are also applicable to the scenario that the first network device is a satellite base station and the second network device is a ground base station, and example B4 and example B5 are applicable to the scenario that the first network device is a ground base station and the second network device is a satellite base station. In addition, example B2 to example B5 are also applicable to the scenario that the first network device and the second network device are both ground base stations, and the scenario that the first network device and the second network device are both satellite base stations, and so on, which will not be limited by the present application.

[0241] With the above configuration mode two, the second transmission resource of the second network device and the first transmission resource of the first network device can not be orthogonal, in which case, the first network device needs to use the resource orthogonal to the first transmission resource in the second transmission resource when using the first transmission resource through interaction.

[0242] In a possible implementation, when the above-described configuration manner two is adopted, the first information can further include a first time delay corresponding to the first candidate interference group, and the first network device can further wait for the first time delay before sending the random access response to the first terminal device after receiving the random access request sent by the first terminal device. Optionally, the length of the first time delay is at least greater than the length of time from when the second network device uses the first transmission resource to when the second network device switches to use the second transmission resource orthogonal to the first transmission resource. Alternatively, the length of the first time delay is at least greater than the time required for the first network device to interact with the second network device to avoid the first transmission resource, for example, the transmission time delay between the first network device and the second network device. Due to the existence of the first time delay, a certain time can be reserved for the second network device, so that the first network device uses the first transmission resource to send the random access response after the second network device successfully switches to the second transmission resource orthogonal to the first transmission resource, to accurately avoid the downlink interference of the second network device and improve the effect of interference suppression.

[0243] Through the above embodiment one, the first network device can configure M candidate interference groups for the interference between the first beam of the first network device sending the first SSB and the second beam of the second network device sending the second SSB, and can configure random access configuration information and dedicated resources for the first candidate interference group. If the terminal device determines that it belongs to the first candidate interference group, the terminal device can use the random access configuration information of the first candidate interference group to feed back the random access request to the first network device in the random access process, so that the first network device can identify the interference of the first candidate interference group as soon as possible, and can use the dedicated resources of the first candidate interference group to send the random access response to the first terminal device, thereby realizing interference avoidance of the second beam of the second network device in the process of random access using the first beam, and ensuring that the first terminal device can successfully access the first network device.

[0244] Based on the above embodiment one, when the first network device is a ground base station and the second network device is a satellite base station, even if the first terminal device is located in the overlapping range of the coverage areas of the ground base station and the satellite base station, the first terminal device can still access the ground base station using the dedicated resources configured in advance by the ground base station, thereby avoiding the downlink signal of the satellite base station in the random access process and reducing the failure probability of the first terminal device accessing the ground base station. Similarly, when the first network device is a satellite base station and the second network device is a ground base station, the first terminal device can reduce the failure probability of accessing the satellite base station by using the dedicated resources configured in advance by the satellite base station to access the satellite base station. Therefore, the above embodiment one can solve the problem of interference suffered by the terminal device located in the overlapping range of the coverage areas of the satellite base station and the ground base station when the terminal device randomly accesses the satellite base station or the ground base station in the satellite-ground spectrum sharing scenario, and reduce the probability of access failure.

[0245] Embodiment Two

[0246] Please refer to FIG. 7, which is a flowchart of a communication method provided by Embodiment Two, the method involving a first terminal device, a first network device and a second network device. For the first terminal device, the first network device and the second network device, please refer to the above description of Embodiment One, which will not be repeated here.

[0247] As shown in FIG. 7, the method can specifically include the following steps:

[0248] Step 701, the first terminal device receives first information from the first network device, the first information including first random access configuration information of a first candidate interference group, a first transmission resource of the first candidate interference group and second random access configuration information of a second candidate interference group.

[0249] Correspondingly, the first network device sends the first information to the first terminal device.

[0250] Wherein, the first candidate interference group and the second candidate interference group are two different candidate interference groups in the M candidate interference groups. For example, the first candidate interference group is one candidate interference group in the M candidate interference groups except the candidate interference group with the minimum interference strength, and the second candidate interference group is one candidate interference group in the M candidate interference groups different from the first candidate interference group.

[0251] Optionally, the interference strength of the second candidate interference group is lower than the interference strength of the first candidate interference group.

[0252] For example, when the first candidate interference group is one candidate interference group in the M candidate interference groups with the maximum interference strength, the second candidate interference group can be one candidate interference group in the M candidate interference groups with the minimum interference strength, or one candidate interference group in the M candidate interference groups except the candidate interference group with the maximum interference strength and the candidate interference group with the minimum interference strength. For example, when the M candidate interference groups are the example A1 of step 401 in Embodiment One, the first candidate interference group can be the group of “strong interference between the first beam and the second beam”, and the second candidate interference group can be the group of “weak interference between the first beam and the second beam”. For another example, when the M candidate interference groups are the example A4 of step 401 in Embodiment One, the first candidate interference group can be the group of “strong interference between the first beam and the second beam”, and the second candidate interference group can be the group of “weak interference between the first beam and the second beam”, or the group of “sub-strong interference between the first beam and the second beam”.

[0253] For example, when the first candidate interference group is one candidate interference group other than the candidate interference group with the strongest interference intensity and the candidate interference group with the weakest interference intensity among the M candidate interference groups, the second candidate interference group can be one candidate interference group with a lower interference intensity than the first candidate interference group among the M candidate interference groups. For example, when the M candidate interference groups are the example A4 in step 401 in Embodiment One, the first candidate interference group can be the group of “first beam and second beam secondary strong interference”, and the second candidate interference group can be the group of “first beam and second beam weak interference”.

[0254] There are many possible scenarios, which are not listed here.

[0255] Further, optionally, the first candidate interference group corresponds to first random access configuration information, and the second candidate interference group corresponds to second random access configuration information, and the first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, RO grouping, or RO configuration information (such as configuration index in the RO configuration information table, frequency domain resource of the RO, etc.). It can be understood that the first random access configuration information and the second random access configuration information are different in all of the preamble grouping, the RO grouping, and the RO configuration information, or are different in part of the three and the same in the other part.

[0256] For example, when the preamble groupings are different, the first network device can pre-divide all the preambles into two groups (if there are more candidate interference groups, all the preambles can also be divided into more groups, and the multiple preamble groupings correspond to the multiple candidate interference groups one by one), such as preamble group 1 and preamble group 2. The preambles included in the preamble group 1 and the preambles included in the preamble group 2 are completely different, the preamble group 1 can be assigned to the first candidate interference group, and the preamble group 2 can be assigned to the second candidate interference group. That is, the first random access configuration information includes the preamble group 1 or information that can be used to indicate the preamble group 1, and the first random access configuration information includes the preamble group 2 or information that can be used to indicate the preamble group 2.

[0257] For example, when the groups of ROs are different, the first network device can first determine the configuration information of the RO allocated for the first terminal device to perform random access, the configuration information of the RO being used to indicate part of the ROs (which can be understood as a large RO group) of the first network device, and the first network device can divide the part of the ROs indicated by the configuration information of the RO into two smaller groups (if there are more candidate interference groups, the part of the ROs can also be divided into more groups, and the grouping of the plurality of ROs corresponds to the plurality of candidate interference groups one by one), such as RO group 1 and RO group 2. The ROs included in the RO group 1 and the ROs included in the RO group 2 are completely different, the RO group 1 can be allocated to the first candidate interference group, and the RO group 2 can be allocated to the second candidate interference group. That is, the first random access configuration information includes the RO group 1 or information that can be used to indicate the RO group 1, and the first random access configuration information includes the RO group 2 or information that can be used to indicate the RO group 2.

[0258] It should be noted that when grouping the ROs, the grouping can be based on time domain resources, or based on frequency domain resources, or based on time domain resources and frequency domain resources together. For example, when grouping based on time domain resources only, the time domain resources of the RO group 1 and the time domain resources of the RO group 2 do not overlap, but the frequency domain resources of the RO group 1 and the frequency domain resources of the RO group 2 can overlap, such as completely overlap, or partially overlap. For another example, when grouping based on frequency domain resources only, the frequency domain resources of the RO group 1 and the frequency domain resources of the RO group 2 do not overlap, but the time domain resources of the RO group 1 and the time domain resources of the RO group 2 can overlap. For another example, when grouping based on time domain resources and frequency domain resources together, the time domain resources of the RO group 1 and the time domain resources of the RO group 2 do not overlap, and the frequency domain resources of the RO group 1 and the frequency domain resources of the RO group 2 also do not overlap.

[0259] For example, when the configuration information of the ROs is different, the first network device can allocate different groups of RO configuration information to the first candidate interference group and the second candidate interference group, such as allocating a certain configuration index in the RO configuration information table and the frequency domain resources of the RO to the first candidate interference group, and allocating another configuration index in the RO configuration information table and the frequency domain resources of the RO to the second candidate interference group, the two configuration indexes being different, and the frequency domain resources of the two ROs can be the same or different.

[0260] It can be understood that when the preamble groups, the RO groups and the parts in the configuration information of the RO of the first random access configuration information and the second random access configuration information are different, the other parts are the same, and it can be understood that the other parts overlap. For example, when the preamble groups are different, the RO groups can be completely the same, or the groups are different, but the ROs indicated by the different groups overlap. For another example, when the RO groups are different, the preamble groups can be completely the same, such as using all the preambles, or the preamble groups can be different, but the preambles indicated by the different preamble groups overlap. And so on, which will not be listed one by one here.

[0261] In step 702, the first terminal device determines a candidate interference group to which the first terminal device belongs:

[0262] If the first terminal device belongs to the first candidate interference group, step 703 is performed.

[0263] If the first terminal device belongs to the second candidate interference group, step 704 is performed.

[0264] In a possible implementation, the first information can further include a decision parameter of the first candidate interference group and a decision parameter of the second candidate interference group. If the first terminal device determines that the decision parameter of the first candidate interference group is met, the first terminal device can determine that it belongs to the first candidate interference group. If the first terminal device determines that the decision parameter of the second candidate interference group is met, the first terminal device can determine that it belongs to the second candidate interference group. For example, the first terminal device can determine a first RSRP to the first network device according to the first SSB of the first network device, receive a second SSB according to a second SSB of a second network device, and determine a second RSRP to the second network device according to the second SSB. Then, a difference between the first RSRP and the second RSRP can be calculated. If the difference meets the decision parameter of the first candidate interference group, the first terminal device can determine that it belongs to the first candidate interference group. If the difference meets the decision parameter of the second candidate interference group, the first terminal device can determine that it belongs to the first candidate interference group.

[0265] The decision parameter of the first candidate interference group and the decision parameter of the second candidate interference group can be identified based on the same decision threshold, or can be identified based on different decision thresholds. For example, taking the power value of the first RSRP as RSRP1 and the power value of the second RSRP as RSRP2 as an example, the following examples are given for illustration:

[0266] Example C1, assuming the M candidate interference groups are the example A1 of step 401 in the above embodiment one, the first candidate interference group is the group of "strong interference between the first beam and the second beam", and the second candidate interference group is the group of "weak interference between the first beam and the second beam", then the decision parameter of the first candidate interference group and the decision parameter of the second candidate interference group can be identified based on the same decision threshold TH. If the first RSRP and the second RSRP satisfy RSRP1-RSRP2<TH, the first terminal device can determine that it belongs to the first candidate interference group, and if the first RSRP and the second RSRP satisfy RSRP1-RSRP2≥TH, the first terminal device can determine that it belongs to the second candidate interference group.

[0267] Example C2, assuming the M candidate interference groups are the example A2 of step 401 in the above embodiment one, the first candidate interference group is the group of "strong interference between the first beam and the second beam", and the second candidate interference group is the group of "less strong interference between the first beam and the second beam", then the decision parameter of the first candidate interference group can be identified based on the decision threshold TH, and the decision parameter of the second candidate interference group can be identified based on the decision thresholds TH1 and TH, TH1 is greater than TH. If the first RSRP and the second RSRP satisfy RSRP1-RSRP2<TH, the first terminal device can determine that it belongs to the first candidate interference group, and if the first RSRP and the second RSRP satisfy TH≤RSRP1-RSRP2<TH1, the first terminal device can determine that it belongs to the second candidate interference group.

[0268] Example C3, assuming the M candidate interference groups are the example A2 of step 401 in the above embodiment one, the first candidate interference group is the group of "strong interference between the first beam and the second beam", and the second candidate interference group is the group of "weak interference between the first beam and the second beam", then the decision parameter of the first candidate interference group can be identified based on the decision threshold TH, and the decision parameter of the second candidate interference group can be identified based on the decision threshold TH1, TH1 is greater than TH. If the first RSRP and the second RSRP satisfy RSRP1-RSRP2<TH, the first terminal device can determine that it belongs to the first candidate interference group, and if the first RSRP and the second RSRP satisfy RSRP1-RSRP2≥TH1, the first terminal device can determine that it belongs to the second candidate interference group.

[0269] It can be understood that the finer the interference division granularity of the M candidate interference groups is, the more the total number of decision thresholds corresponding to the M candidate interference groups will be. However, no matter how many decision thresholds exist, the candidate interference group to which the first terminal device belongs can be inferred based on the above examples, which will not be introduced one by one in this application.

[0270] At step 703, the first terminal device sends a random access request to the first network device using the first random access configuration information.

[0271] Here, if the first terminal device determines that it belongs to the first candidate interference group, it can send a random access request to the first network device using the first random access configuration information of the first candidate interference group. For example, the first terminal device can select a preamble in the preamble group corresponding to the first random access request, and send the preamble in the random access request to the first network device on the RO indicated by the first random access configuration information.

[0272] At step 704, the first terminal device sends a random access request to the first network device using the second random access configuration information.

[0273] Here, if the first terminal device determines that it belongs to the second candidate interference group, it can send a random access request to the first network device using the second random access configuration information of the second candidate interference group. For example, the first terminal device can select a preamble in the preamble group corresponding to the second random access request, and send the preamble in the random access request to the first network device on the RO indicated by the second random access configuration information.

[0274] At step 705, the first network device determines the random access configuration information associated with the random access request:

[0275] If the random access request is associated with the first random access configuration information, step 706 is performed;

[0276] If the random access request is associated with the second random access configuration information, step 707 is performed.

[0277] Optionally, when the first random access configuration information and the second random access configuration information correspond to different preamble groups, after receiving the random access request sent by the first terminal device, the first network device can compare the preamble used by the random access request with the preamble group corresponding to the first random access configuration information and the preamble group corresponding to the second random access configuration information, respectively. If the preamble used by the random access request belongs to the preamble group corresponding to the first random access configuration information, it can be determined that the random access request is associated with the first random access configuration information, and if the preamble used by the random access request belongs to the preamble group corresponding to the second random access configuration information, it can be determined that the random access request is associated with the second random access configuration information.

[0278] Optionally, when the first random access configuration information and the second random access configuration information correspond to different groups of ROs, after receiving the random access request sent by the first terminal device, the first network device can first determine the RO of the random access request, and if the RO belongs to the group of ROs corresponding to the first random access configuration information, it can be determined that the random access request is associated with the first random access configuration information, and if the RO belongs to the group of ROs corresponding to the second random access configuration information, it can be determined that the random access request is associated with the second random access configuration information.

[0279] Optionally, when the first random access configuration information and the second random access configuration information correspond to different RO configuration information, after receiving the random access request sent by the first terminal device, the first network device can first determine the RO of the random access request, and if the RO belongs to the RO indicated by the RO configuration information corresponding to the first random access configuration information, it can be determined that the random access request is associated with the first random access configuration information, and if the RO belongs to the RO indicated by the RO configuration information corresponding to the second random access configuration information, it can be determined that the random access request is associated with the second random access configuration information.

[0280] It can be understood that if the first random access configuration information and the second random access configuration information correspond to at least two of different preamble groups, different groups of ROs, and different RO configuration information, the first network device can compare the at least two contents of the random access request with the first random access configuration information and the second random access configuration information respectively, and when the at least two contents match one of the random access configuration information, it can be determined that the first terminal device is associated with the random access configuration information.

[0281] Step 706, the first network device sends a random access response to the first terminal device according to the first transmission resource.

[0282] Correspondingly, the first terminal device receives the random access response from the first network device according to the first transmission resource.

[0283] For example, after the first terminal device sends a random access request using the first candidate interference group first random access configuration information, it can wait to receive the random access response returned by the first network device on the first transmission resource of the first candidate interference group.

[0284] Step 707, the first network device sends a random access response to the first terminal device.

[0285] Correspondingly, the first terminal device receives the random access response from the first network device.

[0286] For example, after the first terminal device sends a random access request using the second random access configuration information of the second candidate interference group, the first terminal device can wait to receive a random access response returned by the first network device.

[0287] Optionally, when the second candidate interference group is the candidate interference group with the weakest interference intensity among the M candidate interference groups, such as the "first beam and second beam weak interference" group in example A1 or example A4 of step 401 in the first implementation, the second beam corresponding to the second candidate interference group has very weak interference on the first beam of the first network device, and basically does not affect the communication between the first network device and the terminal device in the coverage range of the first beam. Therefore, interference suppression on the second candidate interference group can not be needed. That is, a dedicated transmission resource can not be configured for the second candidate interference group. In this case, the first network device can send a random access response to the first terminal device according to the random access process in the prior art.

[0288] Conversely, when the second candidate interference group is not the candidate interference group with the weakest interference intensity among the M candidate interference groups, the second beam corresponding to the second candidate interference group also has interference on the first beam of the first network device, but the interference impact is less than that of the first candidate interference group. In this case, a plurality of random access methods for the second candidate interference group can be used, such as:

[0289] Random access method one: to avoid the interference of the second candidate interference group on the first beam, the first network device can also configure a third transmission resource for the second candidate interference group, that is, the first information can also include the third transmission resource of the second candidate interference group. After the first terminal device determines that it belongs to the second candidate interference group, the first terminal device sends a random access request to the first network device using the second random access configuration information of the second candidate interference group, and then waits to receive a random access response returned by the first network device on the third transmission resource of the second candidate interference group. Correspondingly, after the first network device receives the random access request sent by the first terminal device, if it is determined that the random access request is associated with the second random access configuration information of the second candidate interference group, the first network device can send a random access response to the first terminal device according to the third transmission resource. Using random access method one, all candidate interference groups that have interference on the first beam can use dedicated resources for random access, which can maximize the avoidance of interference of the second beam on the first beam.

[0290] In the second random access mode, the first network device can not configure the second transmission resource for the second candidate interference group, because the interference of the second beam to the first beam corresponding to the second candidate interference group is relatively small. In this case, after determining that the random access request is associated with the second random access configuration information of the second candidate interference group, the first network device can send the random access response to the first terminal device according to the existing random access process. Optionally, in order to improve the probability of the first terminal device receiving the random access response, the first network device can also use the enhanced coverage technology to send the random access response to the first terminal device, such as sending multiple random access responses to the first terminal device, or using a lower code rate to send the random access response to the first terminal device, etc. In the second random access mode, different interference strategies can be used for candidate interference groups with different interference levels, such as configuring dedicated resources (or also including response delay, such as the first delay in the above embodiment one) for candidate interference groups with large interference levels, and using enhanced coverage for candidate interference groups with relatively small interference levels. In this way, not only the flexibility of interference avoidance can be improved, but also the number of configurations of dedicated resources (or also including response delay) can be reduced. In addition, in the case of configuring the response delay, because the candidate interference groups with small interference levels do not need to configure the response delay, the first network device can directly respond to the terminal devices in these candidate interference groups, thereby also improving the response speed of the terminal devices in the candidate interference groups with small interference levels.

[0291] Through the above embodiment two, the first network device can configure random access configuration information for at least two candidate interference groups, and can configure dedicated resources for candidate interference groups with large interference levels. In this way, the terminal devices in the candidate interference groups with large interference levels can successfully access the first network device using the dedicated resources, while the candidate interference groups with relatively small interference levels can access the first network device according to the existing technology, or can also use the enhanced coverage technology to improve the probability of successful access. In this way, the above embodiment two can reduce the occupation of configured resources while avoiding the influence of the downlink transmission of the second network device on the downlink transmission of the first network device, and can effectively improve the probability of the terminal devices accessing the first network device.

[0292] It can be understood that the above embodiment two is only introduced by taking the example of the related configuration information of two candidate interference groups included in the first information. In other embodiments, the related configuration information of three or more candidate interference groups can also be included in the first information, such as the related configuration information of M candidate interference groups. For the candidate interference group with the maximum or relatively large interference strength in the M candidate interference groups, the random access configuration information and the transmission resource can be configured for the candidate interference group with the maximum interference strength to perform interference avoidance through the dedicated resource. For the candidate interference group with relatively small interference strength in the M candidate interference groups, only the random access configuration information can be configured for the candidate interference group, and the enhanced coverage technology can also be used to improve the receiving performance of the terminal device to ensure that the terminal device can access successfully. For the candidate interference group with very small interference strength in the M candidate interference groups, such as the candidate interference group with the minimum interference strength, only the random access configuration information can be configured for the candidate interference group, and the existing technology solution can be used for random access to save the configuration resource and the communication overhead. For the specific implementation process of this embodiment, the related content in the above-mentioned embodiment one and embodiment two can be directly referred to, and the present application will not be introduced again.

[0293] The above describes the scheme provided by the embodiments of the present application mainly from the perspective of device interaction. It can be understood that, in order to realize the above functions, each device can include the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed in the present application, the embodiments of the present application can be realized in the form of hardware or the combination of hardware and computer software. Whether a certain function is realized in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0294] The embodiments of the present application can divide the functional units of the device according to the above method examples, for example, each functional unit can be divided according to each function, or two or more functions can be integrated in one unit. The integrated unit can be realized in the form of hardware or software functional unit.

[0295] Based on the above-described communication method, the present application can also provide a communication device which can be used to execute the above communication method. The related features can be referred to the above method embodiments, which will not be described here again.

[0296] In a possible implementation, please refer to Fig. 8, which shows a possible structural schematic diagram of a communication apparatus. The communication apparatus 800 can include a processing unit 810 and a communication unit 820. The communication apparatus 800 can be the first terminal device, or can be applied to or matched with the first terminal device, and can implement the communication method executed by the first terminal device; or the communication apparatus 800 can be the first network device, or can be applied to or matched with the first network device, and can implement the communication method executed by the first network device; or the communication apparatus 800 can be the second network device, or can be applied to or matched with the second network device, and can implement the communication method executed by the second network device.

[0297] The communication unit 820 can also be referred to as a transceiving unit, a transceiver, a transceiver, or a transceiving device. The processing unit 810 can also be referred to as a processor, a processing board, a processing unit, or a processing device. Optionally, the communication unit 820 is configured to perform the sending operation and the receiving operation of the first terminal device, or the first network device, or the second network device in the above method, and the device in the communication unit 820 for implementing the receiving function can be regarded as a receiving unit, and the device in the communication unit 820 for implementing the sending function can be regarded as a sending unit, that is, the communication unit 820 includes the receiving unit and the sending unit.

[0298] When the communication apparatus 800 is applied to the first terminal device, the processing unit 810 can be configured to implement the processing function of the first terminal device in the embodiments shown in Fig. 4, Fig. 5 or Fig. 7, and the communication unit 820 can be configured to implement the transceiving function of the first terminal device in the embodiments shown in Fig. 4, Fig. 5 or Fig. 7. For example, when the communication apparatus 800 executes the communication method shown in Fig. 4, the communication unit 820 is configured to receive the first information from the first network device, and the first information includes the first random access configuration information of the first candidate interference group and the first transmission resource of the first candidate interference group, the first candidate interference group is one of M candidate interference groups, the M candidate interference groups are related to the first synchronization broadcast block (SSB) of the first network device and the second SSB of the second network device, and M is a positive integer; the processing unit 810 is configured to determine that the first terminal device belongs to the first candidate interference group; and the communication unit 820 is further configured to send a random access request to the first network device using the first random access configuration information, and receive a random access response from the first network device according to the first transmission resource.

[0299] When the communication apparatus 800 is applied to the first network device, the processing unit 810 can be configured to implement the processing function of the first network device in the embodiments shown in FIG. 4, FIG. 5 or FIG. 7, and the communication unit 820 can be configured to implement the transceiving function of the first network device in the embodiments shown in FIG. 4, FIG. 5 or FIG. 7. For example, when the communication apparatus 800 performs the communication method shown in FIG. 4, the communication unit 820 is configured to send the first information to the first terminal device and receive the random access request from the first terminal device; the first information includes the first random access configuration information of the first candidate interference group and the first transmission resource of the first candidate interference group, the first candidate interference group is one of the M candidate interference groups, the M candidate interference groups are related to the first synchronization broadcast block (SSB) of the first network device and the second SSB of the second network device, and M is a positive integer; the processing unit 810 is configured to determine that the random access request is related to the first random access configuration information; and the communication unit 820 is further configured to send the random access response to the first terminal device according to the first transmission resource. Alternatively, when the communication apparatus 800 performs the communication method shown in FIG. 5, the communication unit 820 is further configured to send the second information to the second network device, and the second information is used to indicate that the first network device uses the first transmission resource of the first candidate interference group.

[0300] When the communication apparatus 800 is applied to the second network device, the processing unit 810 can be configured to implement the processing function of the second network device in the embodiment shown in FIG. 5, and the communication unit 820 can be configured to implement the transceiving function of the second network device in the embodiment shown in FIG. 5. For example, when the communication apparatus 800 performs the communication method shown in FIG. 5, the communication unit 820 is configured to receive the second information from the first network device, and the second information is used to indicate that the first network device uses the first transmission resource of the first candidate interference group; and the communication unit 820 is further configured to send the downlink data to the second terminal device according to the second information using the second transmission resource, and the second transmission resource is orthogonal to the first transmission resource.

[0301] In addition, it should be noted that the aforementioned communication unit 820 and / or processing unit 810 can be implemented by virtual modules or means, for example, the processing unit 810 can be implemented by a software function unit or a virtual device, and the communication unit 820 can be implemented by a software function or a virtual device. Alternatively, the processing unit 810 or the communication unit 820 can also be implemented by an entity device, for example, if the communication apparatus is implemented by a chip / chip circuit, the communication unit 820 can be an input / output circuit and / or a communication interface, which performs an input operation (corresponding to the aforementioned receiving operation) and an output operation (corresponding to the aforementioned sending operation); and the processing unit 810 is an integrated processor or a microprocessor or an integrated circuit.

[0302] The division of units in the embodiments of the present application is illustrative, and is merely logical function division. In actual implementation, another division manner can be used. In addition, each function unit in each embodiment of the present application can be integrated in one processor, or can be physically separated, or two or more units can be integrated in one module. The integrated module can be implemented in the form of hardware or in the form of a software function module.

[0303] In another possible implementation, referring to FIG. 9, another possible structural schematic diagram of a communication apparatus is shown. For example, the communication apparatus 900 can be a chip or a chip system. Optionally, the chip system can be composed of a chip in the embodiments of the present application, or can include a chip and other discrete devices.

[0304] The communication apparatus 900 can be used to implement the functions of the first terminal device, or the first network device, or the second network device described in the foregoing embodiments. The communication apparatus 900 can include at least one processor 910 coupled with a memory. Optionally, the memory can be located in the communication apparatus 900, or can be located outside the communication apparatus 900. For example, the communication apparatus 900 can further include at least one memory 920. The memory 920 stores computer programs (or also referred to as instructions) and / or data necessary for implementing any of the foregoing embodiments. The processor 910 can execute the computer programs and / or data stored in the memory 920, to complete the methods in any of the foregoing embodiments.

[0305] The communication apparatus 900 can further include a communication interface 930. The communication apparatus 900 can exchange information with other devices through the communication interface 930. For example, the communication interface 930 can be a transceiver, a circuit, a bus, a module, a pin, or another type of communication interface. When the communication apparatus 900 is a chip or a circuit, the communication interface 930 in the communication apparatus 900 can also be an input / output circuit, which can input (or receive) information and output (or send) information. The processor 910 is an integrated processor, a microprocessor, an integrated circuit, or a logic circuit. The processor 910 can determine output information according to input information.

[0306] The coupling in the embodiments of the present application is indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. The processor 910 can operate in cooperation with the memory 920 and the communication interface 930. The specific connection medium between the processor 910, the memory 920 and the communication interface 930 is not limited in the embodiments of the present application.

[0307] Optionally, referring to FIG. 9, the processor 910, the memory 920 and the communication interface 930 are connected with each other through a bus. The bus 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. For the convenience of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or only one type of bus.

[0308] In the embodiments of the present application, the processor 910 can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as hardware processor execution or executed by a combination of hardware and software modules in the processor.

[0309] In the embodiments of the present application, the memory 920 can be a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., and can also be a volatile memory such as a random-access memory (RAM). The memory 920 can be any other medium capable of carrying or storing desired program code in the form of instructions or data structures and capable of being accessed by a computer, but is not limited to this. The memory 920 in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0310] The communication apparatus 900 can be applied to the first terminal device. Specifically, the communication apparatus 900 can be the first terminal device, or an apparatus capable of supporting the first terminal device to implement the functions of the first terminal device in any of the above-mentioned embodiments. The memory 920 stores computer programs (or instructions) and / or data for implementing the functions of the first terminal device in any of the above-mentioned embodiments. The processor 910 can execute the computer programs and / or data stored in the memory 920 to complete the method performed by the first terminal device in any of the above-mentioned embodiments. When applied to the first terminal device, the communication interface in the communication apparatus 900 can be used to interact with other communication apparatuses (such as the first network device and the second network device), send information to other communication apparatuses or receive information from other communication apparatuses.

[0311] The communication apparatus 900 can be applied to the first network device. Specifically, the communication apparatus 900 can be the first network device, or an apparatus capable of supporting the first network device to implement the functions of the first network device in any of the above-mentioned embodiments. The memory 920 stores computer programs (or instructions) and / or data for implementing the functions of the first network device in any of the above-mentioned embodiments. The processor 910 can execute the computer programs and / or data stored in the memory 920 to complete the method performed by the first network device in any of the above-mentioned embodiments. When applied to the first network device, the communication interface in the communication apparatus 900 can be used to interact with other communication apparatuses (such as the first terminal device and the second network device), send information to other communication apparatuses or receive information from other communication apparatuses.

[0312] The communication apparatus 900 can be applied to the second network device. Specifically, the communication apparatus 900 can be the second network device, or an apparatus capable of supporting the second network device to implement the functions of the second network device in any of the above-mentioned embodiments. The memory 920 stores computer programs (or instructions) and / or data for implementing the functions of the second network device in any of the above-mentioned embodiments. The processor 910 can execute the computer programs and / or data stored in the memory 920 to complete the method performed by the second network device in any of the above-mentioned embodiments. When applied to the second network device, the communication interface in the communication apparatus 900 can be used to interact with other communication apparatuses (such as the first network device and the second terminal device), send information to other communication apparatuses or receive information from other communication apparatuses.

[0313] Based on the above, the present application further provides a communication system, which includes the first terminal device, the first network device and the second network device mentioned in any of the above-mentioned method embodiments, and can be used to perform the method performed by each device in any of the above-mentioned method embodiments.

[0314] Based on the above, the present application further provides a computer readable storage medium storing instructions which, when executed, cause the method performed by each device in any of the method embodiments to be performed. The computer readable storage medium can include a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and various media that can store program codes.

[0315] Based on the above, the present application further provides a computer program product including a computer program (also referred to as code or instructions), which, when executed on a computer, causes the computer to perform the method performed by each device in any of the method embodiments. Optionally, the computer can be a communication device such as a first terminal device, a first network device or a second network device.

[0316] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to if there is no special description and no logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0317] In the present application, "at least one" means one or more, and "multiple" means two or more. The association relationship between the associated objects is described by "and / or", which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following cases: A exists alone, A and B exist together, B exists alone, where A and B can be singular or plural. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0318] It can be understood that the various numbers (such as the numerical numbers "first", "second", and the like, such as the letter numbers "example A1", "example B1", "example C1", etc.) involved in the embodiments of the present application are only for the convenience of differentiation, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to their functions and inherent logic.

[0319] Those skilled in the art will appreciate that embodiments of the application can be devised for a method, a system, or a computer program product. Accordingly, the present application can be embodied in the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application can take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, compact disc read-only memory (CD-ROM), optical storage, and the like) embodying computer readable program code.

[0320] The present application is described in reference to the flow diagrams and / or block diagrams of the methods, apparatus (systems) and computer program products according to this application. It will be understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processing machine, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks.

[0321] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagrams and / or block diagrams block or blocks.

[0322] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks.

Claims

1. A communication method characterized by comprising: Applied to a first terminal device, comprising: receiving first information from a first network device, wherein the first information comprises first random access configuration information of a first candidate interference group and a first transmission resource of the first candidate interference group, the first candidate interference group is one of M candidate interference groups, the M candidate interference groups are related to a first synchronization signal and broadcast channel block (SSB) of the first network device and a second SSB of a second network device, and M is a positive integer; if the first terminal device belongs to the first candidate interference group, using the first random access configuration information to send a random access request to the first network device; receiving a random access response from the first network device according to the first transmission resource.

2. The method of claim 1, wherein, The second network device comprises one or more, the second SSB of the one or more second network devices comprises K, K is a positive integer, the beam of the first network device sending the first SSB is a first beam, the beam of the one or more second network devices sending the K second SSB is K second beam, and the M candidate interference groups comprise at least one of the following: the first beam and the K second beam have no interference, the first beam and I second beams of the K second beams have weak interference, or the first beam and I second beams of the K second beams have strong interference, I is an integer greater than or equal to 1 and less than or equal to K.

3. The method of claim 1 or 2, wherein, M is an integer greater than or equal to 2, and the first candidate interference group is one candidate interference group in the M candidate interference groups except the candidate interference group with the minimum interference strength.

4. The method of any one of claims 1 to 3, wherein, The first information further comprises information of the second SSB of the second network device and a decision parameter of the first candidate interference group; The determination that the first terminal device belongs to the first candidate interference group comprises: determining a first reference signal receiving power of the first terminal device to the first network device according to information of the first SSB of the first network device; determining a second reference signal receiving power of the first terminal device to the second network device according to information of the second SSB of the second network device; if the first reference signal receiving power and the second reference signal receiving power satisfy the decision parameter, it is determined that the first terminal device belongs to the first candidate interference group.

5. The method of claim 4, wherein, The first reference signal receiving power and the second reference signal receiving power correspond to the same receiving configuration, and the receiving configuration comprises: the number of receiving antennas, beamforming information, and receiving polarization information.

6. The method of any one of claims 1 to 5, wherein, The first transmission resource and the second transmission resource of the second network device satisfy at least one of the following conditions: time domain non-overlapping, frequency domain non-overlapping, or different polarization modes.

7. The method of any one of claims 1 to 6, wherein, The first information further comprises a first time delay corresponding to the first candidate interference group; and the receiving of the random access response from the first network device according to the first transmission resource comprises: after a first time delay after sending the random access request to the first network device, receiving the random access response from the first network device according to the first transmission resource.

8. The method of any one of claims 1 to 7, wherein, The first information further comprises second random access configuration information of a second candidate interference group, the second candidate interference group belonging to one of the M candidate interference groups different from the first candidate interference group; The method further comprises: determining that the first terminal device belongs to the second candidate interference group, and using the second random access configuration information to send a random access request to the first network device; receiving a random access response from the first network device.

9. The method of claim 8, wherein, The interference strength of the second candidate interference group is lower than that of the first candidate interference group.

10. The method of claim 8 or 9, wherein, The first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, random access occasion grouping, or random access occasion configuration information.

11. The method of any one of claims 1 to 10, wherein, The first transmission resource comprises a downlink transmission resource.

12. The method of any one of claims 1 to 11, wherein, The first information is carried in a system information block (SIB).

13. A communication method characterized by comprising: Applied to a first network device, comprising: sending first information to a first terminal device, the first information comprising first random access configuration information of a first candidate interference group and a first transmission resource of the first candidate interference group, the first candidate interference group being one of M candidate interference groups, the M candidate interference groups being related to a first synchronization signal and broadcast channel block (SSB) of the first network device and a second SSB of a second network device, M being a positive integer; receiving a random access request from the first terminal device; determining that the random access request is related to the first random access configuration information, and sending a random access response to the first terminal device according to the first transmission resource.

14. The method of claim 13, wherein, The first information further comprises a first time delay corresponding to the first candidate interference group; and the sending of the random access response to the first terminal device according to the first transmission resource comprises: sending the random access response to the first terminal device according to the first transmission resource after a first time delay after receiving the random access request from the first terminal device.

15. The method of claim 13 or 14, wherein, The method further comprises: sending second information to the second network device, the second information being used to instruct the first network device to use the first transmission resource.

16. The method of claim 15, wherein, The second information further comprises location information of the first terminal device.

17. The method of claim 16, wherein, The location information of the first terminal device is determined according to at least one of the following: a second SSB associated with the random access request, time delay information of the random access request, a wave position associated with the random access request, or location information carried by the first terminal device when sending the random access request.

18. The method of any one of claims 13 to 17, wherein, The first transmission resource is based on a periodic configuration or an on-demand configuration.

19. The method of any one of claims 13 to 18, wherein, The first information further comprises information of a second SSB of the second network device and a decision parameter of the first candidate interference group.

20. The method of any one of claims 13 to 19, wherein, The first information further comprises second random access configuration information of a second candidate interference group, the second candidate interference group belonging to one of the M candidate interference groups different from the first candidate interference group; the method further comprises: determining that the random access request is related to the second random access configuration information, and sending the random access response to the first terminal device.

21. The method of claim 20, wherein, The first random access configuration information and the second random access configuration information are different in at least one of the following: preamble grouping, random access occasion grouping, or random access occasion configuration information.

22. A method of communication, comprising: Applied to a second network device, comprising: Receiving second information from a first network device, the second information being used to indicate that the first network device uses a first transmission resource of a first candidate interference group; According to the second information, using a second transmission resource to send downlink data to a second terminal device, the second transmission resource being orthogonal to the first transmission resource.

23. The method of claim 22, wherein, The use of a second transmission resource to send downlink data to a second terminal device includes: Within the coverage range of the second network device, or within the coverage range of the beam associated with the first candidate interference group, using the second transmission resource to send downlink data to the second terminal device.

24. The method of claim 23, wherein, The second transmission resource and the first transmission resource satisfy at least one of the following conditions: time domain orthogonal, frequency domain orthogonal, or polarization orthogonal.

25. The method of any one of claims 22 to 24, wherein, The second information further includes location information of the first terminal device; The use of a second transmission resource to send downlink data to a second terminal device includes: Within the area corresponding to the location information, using the second transmission resource to send downlink data to the second terminal device.

26. A communications device, characterized by Comprising a module or unit for executing the method of any one of claims 1-12, or a module or unit for executing the method of any one of claims 13-21, or a module or unit for executing the method of any one of claims 22-25.

27. A communications device, characterized by Comprising: At least one processor for executing the computer program or instructions to implement the method of any one of claims 1-12, or the method of any one of claims 13-21, or the method of any one of claims 22-25.

28. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, when the computer programs or instructions run on the computer, implement the method of any one of claims 1-12, or the method of any one of claims 13-21, or the method of any one of claims 22-25.

29. A computer program product, characterised in that, Comprising a computer program, when the computer reads and executes the computer program product, so that the computer executes the method of any one of claims 1-12, or the method of any one of claims 13-21, or the method of any one of claims 22-25.

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