Communication method and related apparatus

Abstract

The present application relates to the technical field of wireless communications, and particularly relates to a communication method and a related apparatus. The method comprises: receiving a first synchronization signal by means of a first channel, and receiving a second synchronization signal by means of a second channel, wherein the frequency domain positions of the first channel and the second channel are different; acquiring a first signal on the basis of the first synchronization signal and the second synchronization signal; and performing time-frequency synchronization on the basis of the first signal. By using the method, the technical problem of normal paging of a first terminal device being affected due to the fact that a channel is located at a deep fading frequency can be solved, and the transmission reliability of a synchronization signal can be enhanced, thereby ensuring normal paging of a first terminal device.

Description

Communication method and related apparatus

[0001] This application claims priority from the Chinese patent application No. 202411063753.7 filed on August 2, 2024, and entitled "A communication method and related apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

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

[0003] With the development of communication technology, narrowband communication systems are still widely used in satellite communication. In satellite communication, when a terminal device is called by other users, the network device will send paging information to the terminal device. After receiving the paging information, if the terminal device is in standby state (or idle state), the terminal device will initiate random access and enter connected state to connect the call. However, in the paging process, the terminal device usually does not pass the satellite, that is, the terminal device antenna beam is not aligned with the satellite direction, so the communication environment where the terminal device is located at this time is random, that is, the terminal device may be located in an environment with shielding, that is, there is no line of sight (LOS) transmission path or the LOS transmission path is severely attenuated. Then, the signal received by the terminal device is obtained through multiple reflection paths and refraction paths, which is called non line of sight (NLOS) multipath channel. In possible scenarios, the signal received by the terminal device through LOS transmission can also be obtained through multiple reflection paths and refraction paths, that is, there can also be a multipath channel in LOS transmission. However, in the case of multipath transmission, the multipath channel will exhibit significant frequency selectivity, that is, the transmission quality at some frequencies is significantly lower than that at other frequencies, which can be referred to as frequency selective fading.

[0004] Currently, a synchronization channel is usually set in the paging process, and a synchronization signal is sent on the synchronization channel for time-frequency synchronization between the terminal device and the network device. At the same time, a paging channel is configured, and paging information is sent on the paging channel. However, in the case of multipath transmission, if the channel used in the paging process happens to be at a frequency with deep fading, the normal paging of the terminal device will be affected. SUMMARY

[0005] To solve the above problems, the present application provides a communication method and related apparatus, which can improve the success rate of the terminal device receiving paging messages.

[0006] The following describes the present application from multiple aspects. It is easily understood by persons skilled in the art that the implementation of the following multiple aspects can refer to each other.

[0007] In a first aspect, embodiments of the present application provide a communication method, applicable to a network device. The method comprises: sending a first synchronization signal through a first channel; and sending a second synchronization signal through a second channel. Here, the frequency domain positions of the first channel and the second channel are different.

[0008] In the embodiments of the present application, the network device and the first terminal device can transmit synchronization signals for time-frequency synchronization through two channels with different frequency domain positions. Even if one of the channels is located at a deep fading frequency, the first terminal device can still receive the synchronization signal through the other channel which is not located at the deep fading frequency and complete time-frequency synchronization. By using this method, the technical problem that the normal paging of the first terminal device is affected due to the channel being located at a deep fading frequency can be solved, the transmission reliability of the synchronization signal can be enhanced, and the normal paging of the first terminal device is ensured.

[0009] In combination with the first aspect, in a possible implementation manner, the method further comprises: sending first configuration information. Here, the first configuration information comprises channel identification information, period information of the first channel, and channel identification information, period information of the second channel. The first configuration information is used for configuring the first channel and the second channel. The period information of the first channel is used for indicating the period of the first synchronization signal on the first channel, and the period information of the second channel is used for indicating the period of the second synchronization signal on the second channel.

[0010] In combination with the first aspect, in a possible implementation manner, the first configuration information further comprises starting time offset information, transmission power information of the first channel, and starting time offset information, transmission power information of the second channel. Here, the starting time offset information of the first channel is used for indicating the starting time offset amount of the first synchronization signal on the first channel, and the starting time offset information of the second channel is used for indicating the starting time offset amount of the second synchronization signal on the second channel. The transmission power information of the first channel is used for indicating the transmission power of the first synchronization signal on the first channel, and the transmission power information of the second channel is used for indicating the transmission power of the second synchronization signal on the second channel.

[0011] In the above implementation, the network device can configure two channels with different frequency domain positions for the first terminal device through the first configuration information to transmit the synchronization signal, so that the probability that the channel used for transmitting the synchronization signal is located at a deep fading frequency can be reduced, and the scheme is simple and easy to implement.

[0012] In combination with the first aspect, in a possible implementation manner, the method is applied to a narrowband communication system, and the channel bandwidth in the narrowband communication system is less than or equal to 1 megahertz.

[0013] In a second aspect, an embodiment of the present application provides a communication method, applicable to a first terminal device. The method comprises: receiving a first synchronization signal through a first channel; receiving a second synchronization signal through a second channel. Here, the frequency domain positions of the first channel and the second channel are different. A first signal is acquired according to the first synchronization signal and the second synchronization signal. Time-frequency synchronization is performed according to the first signal.

[0014] In combination with the second aspect, in a possible implementation manner, the method further comprises: receiving first configuration information. Here, the first configuration information comprises channel identification information and periodicity information of the first channel, and channel identification information and periodicity information of the second channel. The first configuration information is used for configuring the first channel and the second channel. The periodicity information of the first channel is used for indicating the periodicity of the first synchronization signal on the first channel, and the periodicity information of the second channel is used for indicating the periodicity of the second synchronization signal on the second channel.

[0015] In combination with the second aspect, in a possible implementation manner, the first configuration information further comprises starting time offset information and transmission power information of the first channel, and starting time offset information and transmission power information of the second channel. Here, the starting time offset information of the first channel is used for indicating the starting time offset of the first synchronization signal on the first channel, and the starting time offset information of the second channel is used for indicating the starting time offset of the second synchronization signal on the second channel. The transmission power information of the first channel is used for indicating the transmission power of the first synchronization signal on the first channel, and the transmission power information of the second channel is used for indicating the transmission power of the second synchronization signal on the second channel.

[0016] In combination with the second aspect, in a possible implementation manner, the method is applied to a narrowband communication system, and the channel bandwidth in the narrowband communication system is less than or equal to 1 megahertz.

[0017] It should be understood that the communication method provided by the second aspect is used to cooperate with the communication method provided by the first aspect, and thus the same beneficial effects can be achieved. In order to avoid redundancy, the description will not be repeated.

[0018] It should be understood that the communication method provided by the first aspect is also applicable to functional components in a network device, such as a processor, a chip, a chip system, a circuit, etc. in the network device, and the present application does not make specific limitations thereon. Similarly, the communication method provided by the second aspect is also applicable to functional components in a first terminal device, and the description will not be repeated here in order to avoid redundancy.

[0019] In a third aspect, an embodiment of the present application provides a communication method, applicable to a network device. The method comprises: sending first paging information on a third channel; and sending second paging information on a fourth channel. Here, the first paging information and the second paging information are both used for initiating paging to a first terminal device.

[0020] Optionally, the first paging information and the second paging information can contain the same content or different content. Specifically, in the case that the first paging information and the second paging information contain the same content, the first paging information and the second paging information can be the same paging information. In the case that the first paging information and the second paging information contain different content, the first paging information and the second paging information can be different paging information, and at this time, the first paging information and the second paging information can be two parts or redundancy versions of information obtained by encoding, modulating, and sequence mapping the same paging information.

[0021] In the implementation described above, the network device and the first terminal device can transmit paging information through two channels with different frequency domain positions to initiate paging. Even if one of the channels is located at a frequency with deep fading, the first terminal device can still receive paging information through the other channel that is not located at the frequency with deep fading to initiate paging. By using this method, the technical problem that the normal paging of the first terminal device is affected due to the channel being located at the frequency with deep fading can be solved, the success rate of the terminal device receiving paging information can be improved, the transmission reliability of the paging information can be enhanced, and the normal paging of the first terminal device can be ensured.

[0022] In combination with the third aspect, in a possible implementation manner, the method further includes: sending second configuration information. Here, the second configuration information includes channel identification information, paging occasion information, and period information of the third channel, and channel identification information, paging occasion information, and period information of the fourth channel. The second configuration information is used to configure the third channel and the fourth channel. The paging occasion information of the third channel is used to indicate the paging occasion of the first paging information on the third channel, and the paging occasion information of the fourth channel is used to indicate the paging occasion of the second paging information on the fourth channel. The period information of the third channel is used to indicate the period of the paging occasion of the first paging information on the third channel, and the period information of the fourth channel is used to indicate the period of the paging occasion of the second paging information on the fourth channel.

[0023] In combination with the third aspect, in a possible implementation manner, the second configuration information further includes starting time offset information of the third channel and starting time offset information of the fourth channel. Here, the starting time offset information of the third channel is used to indicate the starting time offset amount of the paging occasion of the first paging information on the third channel, and the starting time offset information of the fourth channel is used to indicate the starting time offset amount of the paging occasion of the second paging information on the fourth channel.

[0024] In the implementation, the network device can configure two channels with different frequency domain positions for the first terminal device through the first configuration information to transmit the paging information, so that the probability that the channel used to transmit the paging information is located at a deep fading frequency can be reduced, and the scheme is simple and easy to implement.

[0025] With reference to the third aspect, in a possible implementation, in a case where the first terminal device belongs to the first paging group, the paging occasion of the first paging information on the third channel is a paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel is a paging occasion corresponding to the first paging group. The period of the paging occasion of the first paging information on the third channel is a period of a paging occasion corresponding to the first paging group, and the period of the paging occasion of the second paging information on the fourth channel is a period of a paging occasion corresponding to the first paging group.

[0026] With reference to the third aspect, in a possible implementation, the starting time offset of the paging occasion of the first paging information on the third channel is a starting time offset of a paging occasion corresponding to the first paging group, and the starting time offset of the paging occasion of the second paging information on the fourth channel is a starting time offset of a paging occasion corresponding to the first paging group.

[0027] In the implementation, the network device can configure the paging occasions corresponding to the first paging group to which the first terminal device belongs to be located on different channels. In this way, when the paging information is transmitted on different paging occasions, the probability that the channel used is located at a deep fading frequency can be further reduced.

[0028] With reference to the third aspect, in a possible implementation, in a case where the first terminal device belongs to the second paging group and the third paging group, and a paging occasion corresponding to the second paging group is located on the third channel and a paging occasion corresponding to the third paging group is located on the fourth channel, the period of the paging occasion of the first paging information on the third channel is a period of a paging occasion corresponding to the second paging group, and the period of the paging occasion of the second paging information on the fourth channel is a period of a paging occasion corresponding to the third paging group.

[0029] With reference to the third aspect, in a possible implementation, the starting time offset of the paging occasion of the first paging information on the third channel is a starting time offset of a paging occasion corresponding to the second paging group, and the starting time offset of the paging occasion of the second paging information on the fourth channel is a starting time offset of a paging occasion corresponding to the third paging group.

[0030] With reference to the third aspect, in a possible implementation, the second configuration information further includes first information. Here, the first information is used to indicate a paging group associated with a paging occasion of the first terminal device.

[0031] In the implementation, the network device can configure the first terminal device to belong to a plurality of paging groups, and the paging occasions corresponding to the plurality of paging groups can be located on different channels. In this way, when the paging information is transmitted on the paging occasions corresponding to different paging groups, the probability that the used channel is located in a deep fading frequency can be further reduced.

[0032] In combination with the third aspect, in a possible implementation, the method is applied to a narrowband communication system, and a channel bandwidth in the narrowband communication system is less than or equal to 1 megahertz.

[0033] In the fourth aspect, an embodiment of the present application provides a communication method, which is applied to a first terminal device. The method comprises: receiving first paging information on a third channel; and receiving second paging information on a fourth channel. The first paging information and the second paging information are both used to initiate paging to the first terminal device. Third paging information is obtained according to the first paging information and the second paging information. The third paging information is used for the first terminal device to determine whether the first terminal device is paged.

[0034] In combination with the fourth aspect, in a possible implementation, the method further comprises: receiving second configuration information. The second configuration information comprises channel identification information, paging occasion information and period information of the third channel, and channel identification information, paging occasion information and period information of the fourth channel. The second configuration information is used to configure the third channel and the fourth channel. The paging occasion information of the third channel is used to indicate a paging occasion of the first paging information on the third channel, and the paging occasion information of the fourth channel is used to indicate a paging occasion of the second paging information on the fourth channel. The period information of the third channel is used to indicate a period of the paging occasion of the first paging information on the third channel, and the period information of the fourth channel is used to indicate a period of the paging occasion of the second paging information on the fourth channel.

[0035] In combination with the fourth aspect, in a possible implementation, the second configuration information further comprises start time offset information of the third channel and start time offset information of the fourth channel. The start time offset information of the third channel is used to indicate a start time offset amount of the paging occasion of the first paging information on the third channel, and the start time offset information of the fourth channel is used to indicate a start time offset amount of the paging occasion of the second paging information on the fourth channel.

[0036] With reference to the fourth aspect, in a possible implementation manner, when the first terminal device belongs to the first paging group, the paging occasion of the first paging information on the third channel is the paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel is the paging occasion corresponding to the first paging group. The period of the paging occasion of the first paging information on the third channel is the period of the paging occasion corresponding to the first paging group, and the period of the paging occasion of the second paging information on the fourth channel is the period of the paging occasion corresponding to the first paging group.

[0037] With reference to the fourth aspect, in a possible implementation manner, the starting time offset of the paging occasion of the first paging information on the third channel is the starting time offset of the paging occasion corresponding to the first paging group, and the starting time offset of the paging occasion of the second paging information on the fourth channel is the starting time offset of the paging occasion corresponding to the first paging group.

[0038] With reference to the fourth aspect, in a possible implementation manner, when the first terminal device belongs to the second paging group and the third paging group, and the paging occasion corresponding to the second paging group is located on the third channel and the paging occasion corresponding to the third paging group is located on the fourth channel, the period of the paging occasion of the first paging information on the third channel is the period of the paging occasion corresponding to the second paging group, and the period of the paging occasion of the second paging information on the fourth channel is the period of the paging occasion corresponding to the third paging group.

[0039] With reference to the fourth aspect, in a possible implementation manner, the starting time offset of the paging occasion of the first paging information on the third channel is the starting time offset of the paging occasion corresponding to the second paging group, and the starting time offset of the paging occasion of the second paging information on the fourth channel is the starting time offset of the paging occasion corresponding to the third paging group.

[0040] With reference to the fourth aspect, in a possible implementation manner, the second configuration information further includes first information. Here, the first information is used to indicate the paging group associated with the paging occasion of the first terminal device.

[0041] With reference to the fourth aspect, in a possible implementation manner, the method is applied to a narrowband communication system, and a channel bandwidth in the narrowband communication system is less than or equal to 1 megahertz.

[0042] It should be understood that the communication method provided by the fourth aspect above is used to cooperate with the communication method provided by the third aspect above, and thus the same beneficial effects can be achieved. In order to avoid redundancy, the description is not repeated.

[0043] It should be understood that the communication method provided in the third aspect above is also applicable to functional components in the network device, such as a processor, a chip, a chip system, a circuit, and the like in the network device, and the present application does not make a specific limitation in this regard. Similarly, the communication method provided in the fourth aspect above is also applicable to functional components in the first terminal device, and thus repeated description is omitted herein.

[0044] In a fifth aspect, the present application provides a communication apparatus, which can be the network device mentioned in the first aspect above. The communication apparatus comprises modules, units or means corresponding to the method described above, which can be implemented by hardware, software or by executing corresponding software by hardware. The hardware or software comprises one or more modules or units corresponding to the functions described above.

[0045] In some possible designs, the communication apparatus comprises a transceiving unit (which can also be referred to as a transceiving module) and a processing unit (which can also be referred to as a processing module). The processing unit is configured to generate a first synchronization signal and a second synchronization signal. The transceiving unit is configured to transmit the first synchronization signal through a first channel. The transceiving unit is also configured to transmit the second synchronization signal through a second channel. Here, the frequency domain positions of the first channel and the second channel are different.

[0046] With reference to the fifth aspect, in a possible implementation, the transceiving unit is further configured to transmit first configuration information. Here, the first configuration information comprises channel identification information and periodicity information of the first channel, and channel identification information and periodicity information of the second channel. The first configuration information is used to configure the first channel and the second channel. The periodicity information of the first channel is used to indicate the period of the first synchronization signal on the first channel, and the periodicity information of the second channel is used to indicate the period of the second synchronization signal on the second channel.

[0047] With reference to the fifth aspect, in a possible implementation, the first configuration information further comprises starting time offset information and transmission power information of the first channel, and starting time offset information and transmission power information of the second channel. Here, the starting time offset information of the first channel is used to indicate the starting time offset of the first synchronization signal on the first channel, and the starting time offset information of the second channel is used to indicate the starting time offset of the second synchronization signal on the second channel. The transmission power information of the first channel is used to indicate the transmission power of the first synchronization signal on the first channel, and the transmission power information of the second channel is used to indicate the transmission power of the second synchronization signal on the second channel.

[0048] In a sixth aspect, the present application provides a communication apparatus, which can be the first terminal device of the second aspect. The communication apparatus comprises modules, units or means corresponding to the method described above, which can be implemented by hardware, software or by hardware executing corresponding software. The hardware or software comprises one or more modules or units corresponding to the functions described above.

[0049] In some possible design, the communication apparatus comprises a transceiver unit (also referred to as a transceiver module) and a processing unit (also referred to as a processing module). The transceiver unit is configured to receive the first synchronization signal through the first channel. The transceiver unit is also configured to receive the second synchronization signal through the second channel. Here, the frequency domain locations of the first channel and the second channel are different. The processing unit is configured to obtain the first signal according to the first synchronization signal and the second synchronization signal. The processing unit is also configured to perform time-frequency synchronization according to the first signal.

[0050] In combination with the sixth aspect, in a possible implementation, the transceiver unit is also configured to receive the first configuration information. Here, the first configuration information comprises channel identification information and periodicity information of the first channel, and channel identification information and periodicity information of the second channel. The first configuration information is used to configure the first channel and the second channel. The periodicity information of the first channel is used to indicate the periodicity of the first synchronization signal on the first channel, and the periodicity information of the second channel is used to indicate the periodicity of the second synchronization signal on the second channel.

[0051] In combination with the sixth aspect, in a possible implementation, the first configuration information further comprises starting time offset information and transmission power information of the first channel, and starting time offset information and transmission power information of the second channel. Here, the starting time offset information of the first channel is used to indicate the starting time offset of the first synchronization signal on the first channel, and the starting time offset information of the second channel is used to indicate the starting time offset of the second synchronization signal on the second channel. The transmission power information of the first channel is used to indicate the transmission power of the first synchronization signal on the first channel, and the transmission power information of the second channel is used to indicate the transmission power of the second synchronization signal on the second channel.

[0052] In a seventh aspect, the present application provides a communication apparatus, which can be the network device of the third aspect. The communication apparatus comprises modules, units or means corresponding to the method described above, which can be implemented by hardware, software or by hardware executing corresponding software. The hardware or software comprises one or more modules or units corresponding to the functions described above.

[0053] In some possible design, the communication apparatus includes a transceiving unit (which can also be referred to as a transceiving module) and a processing unit (which can also be referred to as a processing module). The processing unit is configured to generate first paging information and second paging information. The transceiving unit is configured to transmit the first paging information on a third channel. The transceiving unit is further configured to transmit the second paging information on a fourth channel. Here, the first paging information and the second paging information are both used to initiate paging to the first terminal device.

[0054] With reference to the seventh aspect, in a possible implementation, the transceiving unit is further configured to transmit second configuration information. Here, the second configuration information includes channel identification information, paging occasion information and periodicity information of the third channel, and channel identification information, paging occasion information and periodicity information of the fourth channel. The second configuration information is used to configure the third channel and the fourth channel. The paging occasion information of the third channel is used to indicate a paging occasion of the first paging information on the third channel, and the paging occasion information of the fourth channel is used to indicate a paging occasion of the second paging information on the fourth channel. The periodicity information of the third channel is used to indicate a periodicity of the paging occasion of the first paging information on the third channel, and the periodicity information of the fourth channel is used to indicate a periodicity of the paging occasion of the second paging information on the fourth channel.

[0055] With reference to the seventh aspect, in a possible implementation, the second configuration information further includes starting time offset information of the third channel and starting time offset information of the fourth channel. Here, the starting time offset information of the third channel is used to indicate a starting time offset amount of the paging occasion of the first paging information on the third channel, and the starting time offset information of the fourth channel is used to indicate a starting time offset amount of the paging occasion of the second paging information on the fourth channel.

[0056] With reference to the seventh aspect, in a possible implementation, in a case where the first terminal device belongs to a first paging group, the paging occasion of the first paging information on the third channel is a paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel is a paging occasion corresponding to the first paging group. The periodicity of the paging occasion of the first paging information on the third channel is a periodicity of a paging occasion corresponding to the first paging group, and the periodicity of the paging occasion of the second paging information on the fourth channel is a periodicity of a paging occasion corresponding to the first paging group.

[0057] With reference to the seventh aspect, in a possible implementation, the starting time offset amount of the paging occasion of the first paging information on the third channel is a starting time offset amount of a paging occasion corresponding to the first paging group, and the starting time offset amount of the paging occasion of the second paging information on the fourth channel is a starting time offset amount of a paging occasion corresponding to the first paging group.

[0058] With reference to the seventh aspect, in a possible implementation manner, in a case where the first terminal device belongs to the second paging group and the third paging group, and the paging occasion corresponding to the second paging group is located on the third channel and the paging occasion corresponding to the third paging group is located on the fourth channel, a period of the paging occasion of the first paging information on the third channel is a period of the paging occasion corresponding to the second paging group, and a period of the paging occasion of the second paging information on the fourth channel is a period of the paging occasion corresponding to the third paging group.

[0059] With reference to the seventh aspect, in a possible implementation manner, a starting time offset of the paging occasion of the first paging information on the third channel is a starting time offset of the paging occasion corresponding to the second paging group, and a starting time offset of the paging occasion of the second paging information on the fourth channel is a starting time offset of the paging occasion corresponding to the third paging group.

[0060] With reference to the seventh aspect, in a possible implementation manner, the second configuration information further includes first information. Here, the first information is used to indicate a paging group associated with a paging occasion of the first terminal device.

[0061] In the eighth aspect, the present application provides a communication apparatus, which can be the first terminal device in the fourth aspect. The communication apparatus includes modules, units or means corresponding to the above method, which can be implemented by hardware, software or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

[0062] In some possible designs, the communication apparatus includes a transceiver (which can also be referred to as a transceiver module) and a processing unit (which can also be referred to as a processing module). The transceiver is configured to receive the first paging information on the third channel. The transceiver is further configured to receive the second paging information on the fourth channel. Here, the first paging information and the second paging information are both used to initiate paging to the first terminal device. The processing unit is configured to acquire the third paging information according to the first paging information and the second paging information. Here, the third paging information is used for the first terminal device to determine whether it is paged.

[0063] In a possible implementation manner of the eighth aspect, the transceiver is further configured to receive second configuration information. The second configuration information includes channel identification information, paging occasion information and periodicity information of the third channel, and channel identification information, paging occasion information and periodicity information of the fourth channel. The second configuration information is used to configure the third channel and the fourth channel. The paging occasion information of the third channel is used to indicate the paging occasion of the first paging information on the third channel, and the paging occasion information of the fourth channel is used to indicate the paging occasion of the second paging information on the fourth channel. The periodicity information of the third channel is used to indicate the periodicity of the paging occasion of the first paging information on the third channel, and the periodicity information of the fourth channel is used to indicate the periodicity of the paging occasion of the second paging information on the fourth channel.

[0064] In a possible implementation manner of the eighth aspect, the second configuration information further includes start time offset information of the third channel and start time offset information of the fourth channel. The start time offset information of the third channel is used to indicate a start time offset of the paging occasion of the first paging information on the third channel, and the start time offset information of the fourth channel is used to indicate a start time offset of the paging occasion of the second paging information on the fourth channel.

[0065] In a possible implementation manner of the eighth aspect, in a case where the first terminal device belongs to the first paging group, the paging occasion of the first paging information on the third channel is the paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel is the paging occasion corresponding to the first paging group. The periodicity of the paging occasion of the first paging information on the third channel is the periodicity of the paging occasion corresponding to the first paging group, and the periodicity of the paging occasion of the second paging information on the fourth channel is the periodicity of the paging occasion corresponding to the first paging group.

[0066] In a possible implementation manner of the eighth aspect, the start time offset of the paging occasion of the first paging information on the third channel is the start time offset of the paging occasion corresponding to the first paging group, and the start time offset of the paging occasion of the second paging information on the fourth channel is the start time offset of the paging occasion corresponding to the first paging group.

[0067] In a possible implementation manner of the eighth aspect, in a case where the first terminal device belongs to the second paging group and the third paging group, and the paging occasion corresponding to the second paging group is located on the third channel and the paging occasion corresponding to the third paging group is located on the fourth channel, the periodicity of the paging occasion of the first paging information on the third channel is the periodicity of the paging occasion corresponding to the second paging group, and the periodicity of the paging occasion of the second paging information on the fourth channel is the periodicity of the paging occasion corresponding to the third paging group.

[0068] With reference to the eighth aspect, in a possible implementation manner, a starting time offset of a paging occasion of the first paging information on the third channel is a starting time offset of a paging occasion corresponding to the second paging group, and a starting time offset of a paging occasion of the second paging information on the fourth channel is a starting time offset of a paging occasion corresponding to the third paging group.

[0069] With reference to the eighth aspect, in a possible implementation manner, the second configuration information further includes first information. Here, the first information is used to indicate a paging group associated with a paging occasion of the first terminal device.

[0070] The ninth aspect, the present application provides a computer program product, the computer program product includes instructions, when the instructions run on the computer, make the computer execute the method in the first aspect or any possible implementation manner of the first aspect, or execute the method in the second aspect or any possible implementation manner of the second aspect, or execute the method in the third aspect or any possible implementation manner of the third aspect, or execute the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0071] The tenth aspect, the present application provides a computer readable storage medium, the computer readable storage medium has a computer program stored therein, when the computer program is executed, executes the method in the first aspect or any possible implementation manner of the first aspect, or executes the method in the second aspect or any possible implementation manner of the second aspect, or executes the method in the third aspect or any possible implementation manner of the third aspect, or executes the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0072] The eleventh aspect, the present application provides a communication device, including at least one processor. The at least one processor is used to execute the method in any aspect or any possible implementation manner of the above. The communication device can be the network device in the first aspect, or the device containing the network device, or the device contained in the network device, such as chip; or, the communication device can be the first terminal device in the second aspect, or the device containing the first terminal device, or the device contained in the first terminal device, such as chip; or, the communication device can be the network device in the third aspect, or the device containing the network device, or the device contained in the network device, such as chip; or, the communication device can be the first terminal device in the fourth aspect, or the device containing the first terminal device, or the device contained in the first terminal device, such as chip.

[0073] With reference to the eleventh aspect, in a possible implementation manner, the communication apparatus further includes a memory configured to store necessary program instructions and data (i.e., computer programs).

[0074] With reference to the eleventh aspect, in a possible implementation manner, the memory can be coupled with the processor, or can be independent of the processor.

[0075] With reference to the twelfth aspect, the present application provides a chip system including at least a processor. The processor is configured to execute computer program instructions to enable an apparatus in which the chip system is installed to perform the method in the first aspect or any possible implementation manner of the first aspect, or perform the method in the second aspect or any possible implementation manner of the second aspect, or perform the method in the third aspect or any possible implementation manner of the third aspect, or perform the method in the fourth aspect or any possible implementation manner of the fourth aspect.

[0076] With reference to the twelfth aspect, in a possible implementation manner, the chip system further includes an interface circuit. The interface circuit is configured to receive computer program instructions and transmit the computer program instructions to the processor.

[0077] With reference to the thirteenth aspect, the present application provides a communication apparatus including a processor and an interface circuit. The interface circuit is configured to receive signals from other communication apparatuses outside the communication apparatus and transmit the signals to the processor, or transmit signals from the processor to other communication apparatuses outside the communication apparatus. The processor is configured to implement the method in any of the aspects above by means of a logic circuit or by executing computer programs or instructions. The communication apparatus can be the network device in the first aspect above, or an apparatus including the network device, or an apparatus included in the network device, such as a chip system; or the communication apparatus can be the first terminal device in the second aspect above, or an apparatus including the first terminal device, or an apparatus included in the first terminal device, such as a chip system; or the communication apparatus can be the network device in the third aspect above, or an apparatus including the network device, or an apparatus included in the network device, such as a chip system; or the communication apparatus can be the first terminal device in the fourth aspect above, or an apparatus including the first terminal device, or an apparatus included in the first terminal device, such as a chip system.

[0078] In a fourteenth aspect, the present application provides a communication system. The communication system comprises at least a network device and a first terminal device. The network device is configured to perform the communication method provided in the first aspect or any possible implementation of the first aspect, or perform the communication method provided in the third aspect or any possible implementation of the third aspect. The first terminal device is configured to perform the communication method provided in the second aspect or any possible implementation of the second aspect, or perform the communication method provided in the fourth aspect or any possible implementation of the fourth aspect.

[0079] In conclusion, the communication method provided in the present application can obtain frequency diversity gain by receiving the synchronization signal or the paging information on different channels, thereby solving the technical problem that the normal paging of the first terminal device is affected due to the channel being located at a deep fading frequency, improving the success rate of the terminal device receiving the paging message, enhancing the transmission reliability of the synchronization signal or the paging information, and thereby ensuring the normal paging of the first terminal device. BRIEF DESCRIPTION OF DRAWINGS

[0080] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0081] FIG. 2 is a schematic diagram of another architecture of a communication system according to an embodiment of the present application;

[0082] FIG. 3 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0083] FIG. 4 is a schematic diagram of resources of a channel according to an embodiment of the present application;

[0084] FIG. 5 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0085] FIG. 6 is a schematic diagram of resources of another channel according to an embodiment of the present application;

[0086] FIG. 7 is a schematic diagram of resources of another channel according to an embodiment of the present application;

[0087] FIG. 8 is a schematic diagram of resources of another channel according to an embodiment of the present application;

[0088] FIG. 9 is a schematic diagram of a structure of a communication apparatus according to an embodiment of the present application;

[0089] FIG. 10 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application;

[0090] FIG. 11 is a schematic diagram of another structure of a communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0091] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings provided by the embodiments of the present application.

[0092] In the present application, "at least one" means one or more, and "multiple" means two or more. The association relationship of 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 three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. In the textual description of the present application, the character " / " generally represents an "or" relationship between the associated objects before and after it; in the formulas of the present application, the character " / " represents a "division" relationship between the associated objects before and after it. "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.

[0093] The technical solutions provided by the embodiments of the present application can be applied to various communication systems, for example: Long Term Evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), 5th generation (5G) system or new radio (NR), in addition, it can also be applied to the use of subsequent evolution systems, such as 6th generation 6G communication system, etc.

[0094] The system architecture to which the embodiments of the present application are applied will be introduced below. It should be noted that the system architecture and business scenarios described in the present application are for more clearly illustrating the technical solutions of the present application, and do not constitute a limitation on the technical solutions provided by the present application. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions provided by the present application are also applicable to similar technical problems.

[0095] Please refer to FIG. 1, which is a schematic diagram of an architecture of a communication system provided by an embodiment of the present application. It should be understood that FIG. 1 shows a ground communication system to which the technical solutions provided by the present application are applicable. As shown in FIG. 1, the communication system 10 can include a radio access network (RAN) 100 and a core network (CN) 130. The RAN 100 includes at least one RAN node (such as 110a and 110b in FIG. 1) and at least one terminal (such as 120a-120j in FIG. 1). The RAN 100 can further include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1), and the like. The terminal is connected to the RAN node in a wireless manner. The RAN node is connected to the core network 130 in a wireless or wired manner. The core network device in the core network 130 and the RAN node in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network.

[0096] The RAN 100 can be a 3rd generation partnership project (3GPP)-related cellular system, such as a 4G, 5G mobile communication system, or a future-oriented evolved system. The RAN 100 can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 can also be a communication system in which two or more of the above systems are fused.

[0097] In the communication system shown in FIG. 1, the RAN node, which can also be referred to as an access network device, a network device, a RAN entity, or an access node, etc., constitutes a part of the communication system to help the terminal to realize wireless access. The plurality of RAN nodes in the communication system 10 can be nodes of the same type or nodes of different types. In some scenarios, the roles of the RAN node and the terminal are relative, for example, the network element 120i in FIG. 1 can be a helicopter or a drone, which can be configured as a mobile base station. For those terminals 120j that access the RAN 100 through the network element 120i, the network element 120i is a base station. But for the base station 110a, the network element 120i is a terminal. The RAN node and the terminal are sometimes referred to as communication apparatuses, for example, the network elements 110a and 110b in FIG. 1 can be understood as communication apparatuses with base station functions, and the network elements 120a-120j can be understood as communication apparatuses with terminal functions.

[0098] In a possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a base station in a future mobile communication system, or an access node in a WiFi system, etc. The RAN node can be a macro base station (such as 110a in FIG. 1), a micro base station or an indoor station (such as 110b in FIG. 1), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the RAN node in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform). The RAN node can also be provided with a communication module, circuit or chip for performing corresponding communication functions, and program instructions for performing corresponding communication functions. The RAN node in this application can also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node.

[0099] In another possible scenario, multiple RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the 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, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0100] In the communication system shown in FIG. 1, a terminal, which can be a device or module with corresponding communication functions and capable of accessing the communication system, can be referred to as a terminal device, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely applied in various scenarios, such as device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, automatic driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, a transport vehicle with wireless communication function, a communication module, etc. Embodiments of the present application do not limit the device form of the terminal. The terminal is usually provided with a communication module, circuit or chip for performing corresponding communication functions. The terminal is also configured with program instructions for performing corresponding communication functions.

[0101] Referring to FIG. 2, FIG. 2 is a structural diagram of another communication system according to an embodiment of the present application. It should be understood that FIG. 2 shows a non-terrestrial communication system, or a satellite communication system, to which the technical solutions provided by the present application are applicable. As shown in FIG. 2, the communication system 20 can include at least one terminal device 210 and at least one network device 220. Exemplarily, the terminal device 210 can include a terminal device 210a and / or a terminal device 210b, and the network device 220 can include a satellite 220a and / or a satellite 220b. The network device 220 can communicate with the terminal device 210 directly or through a relay station, such as a relay satellite. It should be understood that the network device 220 can include one or more satellites. The satellite can provide communication services, navigation services, positioning services, etc. to the terminal device through multiple beams. The satellite covers a service area through multiple beams, and different beams can communicate through one or more of time division, frequency division, and space division. The satellite can establish an inter-satellite link with another satellite, and the satellite can process and forward data according to a protocol. The communication system 20 can further include a connection device 230, such as a gateway, wherein the network device 220 can communicate with the connection device 230, and the connection device 230 can communicate with a core network 240. It should be understood that FIG. 2 is only an example, and in actual scenarios, the communication system 20 can further include other types of network devices and / or other types of terminal devices, or the communication system 20 can further include more or fewer satellites, more or fewer terminal devices. In possible scenarios, the network device can further include other non-terrestrial devices (or flight devices), such as unmanned aerial vehicles, etc.

[0102] In the embodiments of the present application, the satellite communication system can include a transparent mode and a non-transparent mode. The transparent mode is also referred to as a bent-pipe relay transmission, that is, the signal is only converted in frequency and amplified on the satellite. The non-transparent mode can be referred to as a regenerative (on-board access / processing) transmission, that is, the satellite has part or all of the base station functions. The satellite involved in the embodiments of the present application refers to a man-made satellite. The satellite can be a satellite base station, and can include an orbit receiver or a repeater for relaying information, or be a network device carried on the satellite. The satellite can be a low earth orbit (LEO) satellite, a middle earth orbit (MEO) satellite, a highly elliptical orbit (HEO) satellite, a geostationary earth orbit (GEO) satellite, or a non-geostationary orbit (NGEO) satellite, etc. The present application does not make any limitation in this regard. It should be understood that the solutions in the embodiments of the present application can also be applied to other communication systems, and the corresponding names can also be replaced by the names of the corresponding functions in other communication systems.

[0103] In the communication system shown in FIG. 2, the network device can be a device accessing a network using 3GPP technology or other narrowband satellite communication technology, including but not limited to: a base station, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), a gNB or TRP in a 5G (such as NR) system, a next-generation base station in a 6G mobile communication system, a base station in a future mobile communication system, a base station in a subsequent evolution of 3GPP, etc., and can also be a module or unit that completes part of the functions of a base station, for example, can be a CU, or a DU. The network device can also be: a macro base station, a micro base station, a pico base station, a small station, a relay station, an indoor station, a balloon station, a satellite station, a wireless relay node, a wireless backhaul node, etc. The network device can also be a device accessing a network using non-3GPP technology, for example, including but not limited to an access point (AP) in a wireless fidelity (WiFi) system, a wireless relay node, a wireless backhaul node, etc. The network device can also be a server, a wearable device, or a vehicle-mounted device, etc. The network device can also be a network device in a cloud radio access network (CRAN) scenario. The network device can also be a network device in a non-terrestrial network (NTN), for example, can be a relay satellite, a satellite with base station functions, etc. The network device can contain one or more co-sited or non-co-sited TRPs.

[0104] The terminal device 210 in the communication system shown in FIG. 2 can also be referred to as a UE, an access terminal, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a user terminal, a terminal, a wireless communication device, a UE agent, or a UE apparatus, etc. It is a device with wireless transceiving function, which can be fixed or mobile. The terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can include but is not limited to: a mobile phone, a tablet computer, a computer with wireless transceiving function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a mixed reality (MR) terminal device, an extended reality (XR) terminal device, a wireless terminal in industrial control, a haptic terminal device, a vehicle-mounted terminal device, a wireless terminal in unmanned driving, a wireless terminal in remote medical treatment, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a wearable terminal device, etc. The terminal device can support communication with multiple network devices of different technologies, for example, the terminal device can support communication with a base station supporting an LTE network, can also support communication with a base station supporting a 5G network, and can also support dual connectivity with a base station of an LTE network and a base station of a 5G network.

[0105] It should be understood that, in combination with the communication system 10 shown in FIG. 1, the scheme provided in the embodiments of the present application can be specifically realized by the RAN node and the terminal in the communication system 10. In combination with the communication system shown in FIG. 2, the scheme provided in the present application can be specifically realized by the terminal device 210 and the network device 220 in the communication system 20. For the convenience of understanding, in the embodiments of the present application, the network device and the terminal device will be taken as examples for description.

[0106] In the embodiments of the present application, the method performed by the network device can also be realized by the functional components inside the network device, such as a chip, a chip system, a processor, a circuit, etc. Similarly, the method performed by the terminal device can also be realized by the functional components inside the terminal device, such as a chip, a chip system, a processor, a circuit, etc.

[0107] Currently, a synchronization channel is usually set in a paging process, and a synchronization signal is sent on the synchronization channel for time-frequency synchronization between a terminal device and a network device. Meanwhile, a paging channel is configured, and paging information is sent on the paging channel. However, in the case of multipath transmission, if the channel used in the paging process happens to be at a frequency with deep fading, the normal paging of the terminal device will be affected. Therefore, the technical problem to be solved by the present application is how to ensure the normal paging of the terminal device.

[0108] In combination with the foregoing, the communication method of the embodiments of the present application is exemplarily introduced below.

[0109] It should be noted that, in actual implementation, the network device can communicate with multiple terminal devices, and for the purpose of illustration, the communication method provided by the embodiments of the present application will be described below by taking the case where the network device communicates with one terminal device (hereinafter referred to as the first terminal device) as an example.

[0110] Please refer to FIG. 3, which is a flowchart of a communication method provided by an embodiment of the present application. It should be understood that the communication method can be applied to the communication system shown in FIG. 1 or FIG. 2, and can be particularly executed by the terminal device and the network device shown in FIG. 1 or FIG. 2. As shown in FIG. 3, the communication method can include the following steps:

[0111] S301, the network device sends a first synchronization signal to the first terminal device through a first channel. Correspondingly, the first terminal device receives the first synchronization signal through the first channel.

[0112] In some possible implementation manners, the network device can generate the first synchronization signal and send the first synchronization signal to the first terminal device through the first channel in the case where it is determined that time-frequency synchronization with the first terminal device is needed (for example, the first terminal device is called by a second terminal device other than the first terminal device).

[0113] Further, the first terminal device can receive the first synchronization signal through the first channel.

[0114] In the embodiments of the present application, receiving the synchronization signal can also be understood as detecting the synchronization signal.

[0115] S302, the network device sends a second synchronization signal to the first terminal device through a second channel. Correspondingly, the first terminal device receives the second synchronization signal through the second channel.

[0116] In some possible implementation manners, the network device can also generate the second synchronization signal and send the second synchronization signal to the first terminal device through the second channel in the case where it is determined that time-frequency synchronization with the first terminal device is needed (for example, the first terminal device is called by a second terminal device other than the first terminal device).

[0117] The frequency domain positions of the first channel and the second channel are different. It should be noted that in the embodiments of the present application, the frequency domain position of a channel refers to the frequency domain resource corresponding to the channel, and can also be understood as the center frequency and bandwidth corresponding to the channel.

[0118] Optionally, the frequency domain position of the first channel and the frequency domain position of the second channel are different, which can mean that the frequency domain resources corresponding to the first channel and the second channel can partially overlap. Alternatively, it can also mean that the frequency domain resources corresponding to the first channel and the second channel do not overlap, for example, there is at least one frequency domain element interval between the frequency domain resources corresponding to the first channel and the second channel. The embodiments of the present application are not limited in this regard.

[0119] It should be noted that in the embodiments of the present application, the synchronization signal can be a sequence with good correlation, and can be used by a terminal device of a network device to perform time-frequency synchronization. Optionally, the sequence used by the first synchronization signal and the sequence used by the second synchronization signal can be the same or different, and the embodiments of the present application are not limited in this regard.

[0120] Further, the first terminal device can receive the second synchronization signal through the second channel.

[0121] Optionally, in the embodiments of the present application, the first channel and the second channel can be synchronization channels, which are used to transmit synchronization signals to achieve time-frequency synchronization.

[0122] S303, the first terminal device obtains a first signal according to the first synchronization signal and the second synchronization signal.

[0123] In some possible implementation manners, after receiving the first synchronization signal and the second synchronization signal, the first terminal device can obtain a first signal according to the first synchronization signal and the second synchronization signal.

[0124] In an optional embodiment, the first terminal device can combine the received first synchronization signal and the second synchronization signal to obtain the first signal.

[0125] Optionally, the first terminal device can perform weighted average operation or sum average operation on the received first synchronization signal and the second synchronization signal to obtain the first signal. For example, assuming that the received first synchronization signal is s0 and the second synchronization signal is s1. The target terminal device performs sum average operation on the first synchronization signal s0 and the second synchronization signal s1 to obtain the first signal. Here, it is assumed that the first signal is s, wherein the first signal s, the first synchronization signal s0 and the second synchronization signal s1 satisfy the formula: s=(s0+s1) / 2.

[0126] It should be understood that the first synchronization signal and the second synchronization signal described above can also adopt other possible merging manners, and the present application does not make a specific limitation in this regard.

[0127] S304, the first terminal device performs time-frequency synchronization according to the first signal.

[0128] In some possible implementation manners, after obtaining the first signal, the first terminal device can perform time-frequency synchronization according to the first signal, so as to realize time-frequency synchronization between the network device and the first terminal device.

[0129] It should be noted that the foregoing describes the case of transmitting synchronization signals through two different channels. In actual implementation, the network device can also send synchronization signals through three or more than three different channels, and correspondingly, the first terminal device can receive synchronization signals through three or more than three different channels, and combine the three or more than three received synchronization signals to obtain one synchronization signal for time-frequency synchronization with the network device. That is, the synchronization signals can be transmitted through three or more than three different channels, and the specific process can refer to the process of transmitting the synchronization signals through two different channels described above, which will not be described herein again.

[0130] In the embodiment of the present application, the network device and the first terminal device can transmit the synchronization signals for time-frequency synchronization through two channels with different frequency domain positions, that is, even if one of the channels is located at a deep fading frequency, the first terminal device can still receive the synchronization signal through another channel not located at the deep fading frequency and complete time-frequency synchronization. By using this method, the technical problem that the normal paging of the first terminal device is affected due to the channel located at the deep fading frequency can be solved, the transmission reliability of the synchronization signal can be enhanced, and the normal paging of the first terminal device is ensured.

[0131] In some possible implementation manners, as shown in FIG. 3, the communication method can further include step S305. It should be understood that step S305 can be performed before step S301.

[0132] S305, the network device sends first configuration information to the first terminal device. Correspondingly, the first terminal device receives the first configuration information.

[0133] In some possible implementation manners, when it is determined that the time-frequency synchronization with the first terminal device is needed (for example, the first terminal device is called by a second terminal device other than the first terminal device), the network device can generate the first configuration information and send the first configuration information to the first terminal device.

[0134] The first configuration information can be used to configure the first channel and the second channel.

[0135] Optionally, the first configuration information can comprise channel identification information of the first channel, period information of the first channel, channel identification information of the second channel, and period information of the second channel. The period information of the first channel can be used to indicate a transmission period of the first synchronization signal on the first channel, and the period information of the second channel can be used to indicate a transmission period of the second synchronization signal on the second channel.

[0136] For example, referring to FIG. 4, which is a schematic diagram of resources of a channel according to an embodiment of the present application. As shown in FIG. 4, assume that there are 10 available channels, which are channel CH0, channel CH1, …, channel CH9, and the channel identifications corresponding to the 10 channels are 0, 1, …, 9 respectively. Assume that the first channel is CH1 and the second channel is CH4, and assume that one frame comprises 10 slots, which are slot 0, slot 1, …, slot 9. Here, take the case of transmitting synchronization signals on the channel CH1 and the channel CH4 in the first frame, the second frame, and the third frame (shown in FIG. 4) as an example to explain the first configuration information. Here, the small squares filled with black color represent the first synchronization signals transmitted on the channel CH1, and the small squares filled with slashes represent the second synchronization signals transmitted on the channel CH4. It should be noted that each time synchronization signals are transmitted on a channel, multiple slots can be occupied, and here, take the case of occupying one slot each time synchronization signals are transmitted as an example.

[0137] In combination with the content shown in FIG. 4, the channel identification information comprised in the first configuration information can be {1, 4}, and the period information of the channels can be {10slot, 20slot}. Here, the channel identification information {1, 4} can be used to indicate that the first channel is the channel CH1 and the second channel is the channel CH4, and the period information of the channels {10slot, 20slot} can be used to indicate that the transmission period of the first synchronization signal on the channel CH1 is 10slot and the transmission period of the second synchronization signal on the channel CH4 is 20slot.

[0138] In an optional implementation, the first configuration information can further comprise starting time offset information of the first channel, transmit power information of the first channel, starting time offset information of the second channel, and transmit power information of the second channel. Here, the starting time offset information of the first channel can be used to indicate a starting time offset of the first synchronization signal on the first channel, the starting time offset information of the second channel can be used to indicate a starting time offset of the second synchronization signal on the second channel, the transmit power information of the first channel can be used to indicate a transmit power of the first synchronization signal on the first channel, and the transmit power information of the second channel can be used to indicate a transmit power of the second synchronization signal on the second channel.

[0139] For example, referring to FIG. 4, the first configuration information includes starting time offset information {0slot, 2slot} and transmission power information {P0, P1}. The starting time offset information {0slot, 2slot} can be used to indicate that the starting time offset of the first synchronization signal on the channel CH1 is 0slot and the starting time offset of the second synchronization signal on the channel CH4 is 2slot. It can also be understood that the time slot of the first transmission of the first synchronization signal on the channel CH1 is 0slot in the first frame, and the time slot of the first transmission of the second synchronization signal on the channel CH4 is 2slot in the first frame. The transmission power information {P0, P1} can be used to indicate that the transmission power of the first synchronization signal on the channel CH1 is P0 and the transmission power of the second synchronization signal on the channel CH4 is P1.

[0140] Optionally, the starting time offset of the first synchronization signal on the first channel and the starting time offset of the second synchronization signal on the second channel can be different or the same. The embodiments of the present application do not limit this.

[0141] It should be noted that in the case where the starting time offset of the first synchronization signal on the first channel and the starting time offset of the second synchronization signal on the second channel are different, since there is a time interval when the network device transmits the synchronization signals on the first channel and the second channel, the first terminal device can use the time interval to adjust the working frequency to switch to a different channel to detect the synchronization signal.

[0142] It can be understood that the time interval of transmitting the synchronization signals on the first channel and the second channel can be greater than the time of adjusting the working frequency of the terminal device, so that the terminal device can normally receive the synchronization signal on the second channel when the network device transmits the synchronization signal through the second channel. For example, if the time of adjusting the working frequency of the terminal device is t switch , the time interval of transmitting the synchronization signal on the first channel and the second channel needs to be greater than t switch , or in other words, the difference between the starting time offset of the first synchronization signal on the first channel and the starting time offset of the second synchronization signal on the second channel needs to be greater than t switch .

[0143] For example, referring to FIG. 4, since the starting time offset of transmitting the target synchronization signal on the channel CH1 and the channel CH4 by the network device is 0slot and 2slot respectively, the target terminal device can first detect the first synchronization signal on the channel CH1. Further, the target terminal device can use the interval of 1 time slot of the synchronization signals transmitted on the channel CH1 and the channel CH4 to adjust the working frequency to switch from the channel CH1 to the channel CH4 to detect the second synchronization signal.

[0144] In the case that the starting time offset of the first synchronization signal on the first channel is the same as the starting time offset of the second synchronization channel on the second channel, since the network device can send the synchronization signals on the same time slot on the first channel and the second channel, the terminal device can detect the synchronization signals through parallel links in the same time slot.

[0145] Optionally, the first configuration information can further include second information, and the second information can be used to indicate that the first synchronization signal is associated with the second synchronization signal or the first synchronization signal and the second synchronization signal belong to the same synchronization signal burst. The first synchronization signal and the second synchronization signal are associated or the first synchronization signal and the second synchronization signal belong to the same synchronization signal burst, which means that the first synchronization signal and the second synchronization signal are used together for time-frequency synchronization between the network device and the first terminal device.

[0146] In an optional embodiment, after generating the first configuration information, the network device can send the first configuration information to the first terminal device in the form of broadcasting. Alternatively, the network device can also send the first configuration information to the first terminal device in the form of non-broadcasting, for example, the network device can send the first configuration information to the first terminal device through one or more of radio resource control (RRC) signaling, downlink control information (DCI) or medium access control (MAC) control element (CE) signaling. The embodiments of the present application are not limited in this regard.

[0147] In some possible implementations, after receiving the first configuration information, the first terminal device can determine the first channel, the second channel, the transmission period of the first synchronization signal on the first channel and the transmission period of the second synchronization signal on the second channel based on the content contained in the first configuration information.

[0148] In combination with the above example, the first terminal device can determine that the first channel is channel CH1 and the second channel is CH4 based on the channel identification information {1, 4}, and can further determine that the transmission period of the first synchronization signal on the channel CH1 is 10 slots and the transmission period of the second synchronization signal on the channel CH4 is 20 slots based on the period information of the channels {10slot, 20slot}.

[0149] Optionally, the first terminal device can further determine the starting time offset and the transmission power of the first synchronization signal on the first channel and the starting time offset and the transmission power of the second synchronization signal on the second channel based on the content contained in the first configuration information.

[0150] In combination with the above example, the first terminal device can determine that the starting time offset of the first synchronization signal on the channel CH1 is 0 slot and the starting time offset of the second synchronization signal on the channel CH4 is 2 slot based on the starting time offset information {0 slot, 2 slot}, and determine that the transmission power of the first synchronization signal on the channel CH1 is P0 and the transmission power of the second synchronization signal on the channel CH4 is P1 based on the transmission power information {P0, P1}.

[0151] It should be noted that the channel identifier information, the periodicity information, the starting time offset information and the transmission power information of the above channel can also be understood as the information of the synchronization signal transmitted on the channel. In possible scenarios, the information of the synchronization signal transmitted on the channel can not be configured by the network device, but can be agreed by the protocol. The embodiments of the present application do not limit this.

[0152] Optionally, the communication method shown in FIG. 3 can be applied to a narrowband communication system, and the channel bandwidth in the narrowband communication system can be less than or equal to 1 megahertz (MHz). In this case, the communication system shown in FIG. 1 or FIG. 2 can be a narrowband communication system. Specifically, the channel bandwidth of the above first channel and second channel can be less than or equal to 1 MHz. It should be noted that in the embodiments of the present application, the narrowband communication system refers to a communication system whose bandwidth can be divided into multiple narrowband channels, and the network device and the terminal device can transmit information on the multiple narrowband channels. For example, the narrowband communication system of the present application can be an Internet of Things non-terrestrial network (IoT-NTN), a global system for mobile communications (GSM), a geostationary earth orbit mobile radio interface (GMR-1) system or a GMR-1 3G system, etc. The embodiments of the present application do not limit this.

[0153] Please refer to FIG. 5, which is a flow diagram of another communication method provided by the embodiments of the present application. Optionally, the communication method can be applied to the communication system shown in FIG. 1 or FIG. 2. As shown in FIG. 5, the method can include the following steps:

[0154] S501, the network device sends first paging information to the first terminal device through a third channel. Correspondingly, the first terminal device receives the first paging information through the third channel.

[0155] In some possible implementation manners, the network device can generate the first paging information and send the first paging information to the first terminal device on the third channel in a case where it is determined that the first terminal device is called by a second terminal device other than the first terminal device. Here, the first paging information can be used to initiate paging to the first terminal device.

[0156] Further, the first terminal device can receive the first paging information on the third channel.

[0157] S502, the network device sends second paging information to the first terminal device through the fourth channel. Correspondingly, the first terminal device receives the second paging information through the fourth channel.

[0158] In some possible implementation manners, the network device can also generate the second paging information and send the second paging information to the first terminal device on the fourth channel in a case where it is determined that the first terminal device is called by a second terminal device other than the first terminal device. Here, the second paging information can be used to initiate paging to the first terminal device.

[0159] Optionally, the frequency domain positions of the third channel and the fourth channel are different, which means that the frequency domain resources corresponding to the third channel and the fourth channel can partially overlap, or that there can be a frequency domain resource interval between the frequency domain resources corresponding to the third channel and the fourth channel. The embodiments of the present application do not limit this.

[0160] Optionally, the first paging information and the second paging information can contain the same or different contents. It should be noted that, in a case where the first paging information and the second paging information contain different contents, the first paging information and the second paging information can be two parts or redundancy versions of information obtained by encoding, modulating and sequence mapping one paging information. The embodiments of the present application do not limit this.

[0161] It should be noted that, in a case where the first paging information and the second paging information contain the same contents, it can be understood that the network device repeatedly sends one complete paging information on different channels. In a case where the first paging information and the second paging information are different paging information, it can be understood that the network device processes one complete paging information to obtain two different paging information, and maps the two different paging information to two different channels for sending respectively.

[0162] Further, the first terminal device can receive the second paging information on the fourth channel.

[0163] Optionally, in the embodiments of the present application, the third channel and the fourth channel can be paging channels, used for transmitting paging information to initiate paging of the terminal device.

[0164] S503, the first terminal device acquires third paging information according to the first paging information and the second paging information.

[0165] In some possible implementation manners, after receiving the first paging information and the second paging information, the first terminal device can acquire the third paging information according to the first paging information and the second paging information. Here, the third paging information can be used by the first terminal device to determine whether it is paged.

[0166] In an optional embodiment, after receiving the first paging information and the second paging information, the first terminal device can combine the first paging information and the second paging information to obtain the third paging information.

[0167] It should be noted that in the case where the first paging information and the second paging information contain the same content, in a possible scenario, assuming that the first channel is located at a frequency of deep fading, the first terminal device cannot normally receive the first paging information, or in other words, the quality of the received first paging information is poor. Since a complete paging information is repeatedly transmitted on different channels, as long as the second channel is not located at a frequency of deep fading, the first terminal device can still correctly receive the second paging information through the second channel.

[0168] It should be further noted that in the case where the first paging information and the second paging information contain different content, in a possible scenario, assuming that the first channel is located at a frequency of deep fading, the first terminal device cannot correctly receive the first paging information, or in other words, the quality of the received first paging information is poor. Since the forward error correction coding technology is used when transmitting the first paging information, as long as the second channel is not located at a frequency of deep fading, that is, the quality of the second paging information received by the first terminal device is good, the first terminal device can use joint decoding to perform error recovery according to the second paging information and the first paging information to obtain the correct first paging information, so that the first terminal device can correctly receive the transmitted first paging information and the second paging information.

[0169] In the implementation above, in the case that the network device transmits two paging messages containing different contents through two different channels to the first terminal device, since the forward error correction coding technology is adopted when the paging messages are transmitted, even if one channel is located at a frequency with deep fading, resulting in that the corresponding paging message on the one channel is received with poor quality, as long as the other channel is not located at a frequency with deep fading, i.e., the corresponding paging message on the other channel is received with good quality, the first terminal device can obtain the correct paging message through joint decoding, so that the first terminal device can still receive the correct paging message, and the reception quality of the paging message is further ensured.

[0170] Optionally, after obtaining the third paging message, the first terminal device can correctly parse the third paging message to obtain the content contained in the third paging message, and further determine whether the first terminal device is paged according to the content obtained after the parsing. Further, if the first terminal device determines that it is paged, the first terminal device can initiate random access and enter a connected state to make a call. Alternatively, in a possible scenario, if the other user has hung up, the first terminal device can obtain a missed call information after entering the connected state.

[0171] It should be noted that the foregoing describes the case of transmitting paging messages through two different channels. In actual implementation, the network device can also transmit paging messages through three or more different channels, and correspondingly, the first terminal device can receive paging messages through three or more different channels, and determine whether the first terminal device is paged based on the three or more received paging messages. That is, the paging messages can be transmitted through three or more different channels, and the specific process can be referred to the process of transmitting paging messages through two different channels described above, which will not be described herein again.

[0172] It should be further noted that in the embodiments of the present application, the paging message can also be referred to as an alert message or a robust notification, and the alert message and the robust notification refer to more robust paging messages, which are not limited in the embodiments of the present application.

[0173] In the embodiments of the present application, the network device and the first terminal device can transmit paging messages through two channels with different frequency domain locations to initiate paging. Even if one of the channels is located at a frequency with deep fading, the first terminal device can still receive the paging message through the other channel which is not located at a frequency with deep fading to initiate paging. By using this method, the technical problem that the normal paging of the first terminal device is affected due to the channel located at a frequency with deep fading can be solved, the success rate of the terminal device receiving the paging message can be improved, the transmission reliability of the paging message is enhanced, and the normal paging of the first terminal device is ensured.

[0174] Optionally, as shown in FIG. 5, the communication method can further include step S504. It should be understood that step S504 can be performed before step S501.

[0175] S504, the network device sends second configuration information to the first terminal device. Correspondingly, the first terminal device receives the second configuration information.

[0176] In some possible implementation manners, the network device can generate the second configuration information and send the second configuration information to the target terminal device when it is determined that the first terminal device is called by a second terminal device other than the first terminal device.

[0177] The second configuration information can be used to configure the first channel and the second channel.

[0178] Optionally, the second configuration information can include channel identification information, paging occasion information, and periodicity information of the third channel, and channel identification information, paging occasion information, and periodicity information of the fourth channel. The paging occasion information of the third channel can be used to indicate a paging occasion of the first paging information on the third channel, the paging occasion information of the fourth channel can be used to indicate a paging occasion of the second paging information on the fourth channel, the periodicity information of the third channel can be used to indicate a periodicity of the paging occasion of the first paging information on the third channel, and the periodicity information of the fourth channel can be used to indicate a periodicity of the paging occasion of the second paging information on the fourth channel.

[0179] Optionally, the second configuration information can further include start time offset information of the third channel and start time offset information of the fourth channel. Here, the start time offset information of the third channel can be used to indicate a start time offset of the paging occasion of the first paging information on the third channel, and the start time offset information of the fourth channel can be used to indicate a start time offset of the paging occasion of the second paging information on the fourth channel.

[0180] The paging occasion (PO) can be composed of multiple time slots, which can be used by the first terminal device to determine whether it is paged.

[0181] It should be noted that, in the embodiments of the present application, the paging occasion on the channel refers to a paging occasion of a paging group (PG) to which the first terminal device belongs.

[0182] Optionally, the first terminal device can belong to one or more paging groups, which is not limited in the embodiments of the present application.

[0183] In the embodiments of the present application, the one or more paging groups to which the first terminal device belongs can be preconfigured by the network device. Alternatively, the one or more paging groups to which the first terminal device belongs can also be determined by the first terminal device according to a protocol predefined rule.

[0184] For example, the protocol predefined rule can specify that the first terminal device determines one paging group to which the first terminal device belongs according to its corresponding international mobile subscriber identity (IMSI) and the total number N of paging groups configured in the communication system. PG For example, the protocol predefined rule can specify that the first terminal device determines one paging group to which the first terminal device belongs according to mod(IMSI, N PG ). Here, mod(IMSI, N PG ) represents the remainder after the division operation of IMSI and N PG .

[0185] For example, the protocol predefined rule can specify that the first terminal device determines one or more paging groups to which the first terminal device belongs according to its corresponding international mobile subscriber identity (IMSI), one or more preset offset values and the total number N of paging groups configured in the communication system. PG For example, the protocol predefined rule can specify that the first terminal device determines one paging group to which the first terminal device belongs according to mod(IMSI, N PG ), and determines another paging group to which the first terminal device belongs according to mod(IMSI+offset, N PG ). Here, offset represents the preset offset value, which can be a positive integer greater than or equal to 1 and less than N PG . mod(IMSI+offset, N PG ) represents the remainder after the division operation of the sum of IMSI and offset and N PG . It should be understood that the first terminal device determines different paging groups according to mod(IMSI+offset, N PG ) when the preset offset value corresponds to different values.

[0186] Optionally, in the case that the first terminal device belongs to one paging group, the paging occasions of the one paging group can be located on different channels respectively. For example, assuming that there are 10 available channels, which are channel CH0, channel CH1, …, channel CH9. Assuming that the first terminal device belongs to paging group PG0, and the paging group PG0 corresponds to two paging occasions, which are paging occasion PO0 and paging occasion PO1, the paging occasion PO0 of the paging group PG0 can be located on the channel CH1, and the paging occasion PO2 can be located on the channel CH4.

[0187] In the case that the first terminal device belongs to multiple paging groups, the paging occasions of each paging group in the multiple paging groups can all be located on the same channel, but the paging occasions of different paging groups can be located on different channels. For example, assuming that there are 10 available channels, which are channel CH0, channel CH1, …, channel CH9. Assuming that the first terminal device belongs to paging group PG0 and paging group PG1, the paging occasions corresponding to the paging group PG0 can all be located on the channel CH1, and the paging occasions corresponding to the paging group PG1 can all be located on the channel CH4.

[0188] The second configuration information will be further described below in the case that the first terminal device belongs to one paging group (hereinafter referred to as scenario one) and the case that the first terminal device belongs to multiple paging groups (hereinafter referred to as scenario two).

[0189] In scenario one, the second configuration information will be described below by taking the case that the first terminal device belongs to the first paging group as an example. Specifically, the paging occasion of the first paging information on the third channel can be the paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel can be the paging occasion corresponding to the first paging group. The period of the paging occasion of the first paging information on the third channel can be the period of the paging occasion corresponding to the first paging group, and the period of the paging occasion of the second paging information on the fourth channel can be the period of the paging occasion corresponding to the first paging group. The starting time offset of the paging occasion of the first paging information on the third channel can be the starting time offset of the paging occasion corresponding to the first paging group, and the starting time offset of the paging occasion of the second paging information on the fourth channel can be the starting time offset of the paging occasion corresponding to the first paging group.

[0190] It can be understood that the multiple paging occasions corresponding to the first paging group can be located on the third channel or the fourth channel.

[0191] Optionally, the first terminal device can calculate according to mod(i, 2), and further determine the channel where each paging occasion of the first paging group is located as channel n0 or channel n1 according to the result 0 or 1 obtained by calculation. Wherein, mod(i, 2) represents the remainder after i is divided by 2, i represents the serial number of the paging occasion of the first paging group, 2 represents the number of channels where the first paging group is located, channel n0 represents the third channel, and channel n1 represents the fourth channel.

[0192] For example, assuming that the first paging group corresponds to 4 paging occasions in turn, first paging occasion PO0, second paging occasion PO1, third paging occasion PO2, and fourth paging occasion PO3, the serial numbers of the four paging occasions are 0, 1, 2, and 3 respectively. The first terminal device can calculate according to mod(i, 2) and the serial number of the paging occasion, and the results obtained are 0, 1, 0, and 1 in turn. Further, the first terminal device can determine that the above four paging occasions are located on channel n0, channel n1, channel n0, and channel n1 in turn, i.e., the third channel, the fourth channel, the third channel, and the fourth channel.

[0193] For example, assuming that the first paging group corresponds to 4 paging occasions in turn, first paging occasion PO0, second paging occasion PO1, third paging occasion PO2, and fourth paging occasion PO3, the serial numbers of the four paging occasions are 0, 1, 2, and 3 respectively. The first terminal device can calculate according to mod(i, 2) and the serial number of the paging occasion, and the results obtained are 0, 1, 0, and 1 in turn. Further, the first terminal device can determine that the above four paging occasions are located on channel n0, channel n1, channel n0, and channel n1 in turn, i.e., the third channel, the fourth channel, the third channel, and the fourth channel.

[0194] In combination with the content shown in FIG. 6, the channel identifier information included in the second configuration information can be {1, 5}, the channel period information can be {20slot, 20slot}, and the starting time offset information can be {3slot, 13slot}. Among them, the channel identifier information {1, 5} can be used to indicate that the third channel is channel CH1 and the fourth channel is channel CH5. The channel period information {20slot, 20slot} can be used to indicate that the period of the paging occasion corresponding to the first paging group on the channel CH1 is 20slot and the period of the paging occasion corresponding to the first paging group on the channel CH5 is 20slot. The starting time offset information {3slot, 13slot} can be used to indicate that the starting time offset of the paging occasion corresponding to the first paging group on the channel CH1 is 3slot and the starting time offset of the paging occasion corresponding to the first paging group on the channel CH5 is 13slot. It can also be understood that the time slot of the first paging occasion corresponding to the first paging group on the channel CH1 is 3slot in the first frame, and the time slot of the first paging occasion corresponding to the first paging group on the channel CH5 is 13slot, or in other words, the time slot of the first paging occasion corresponding to the first paging group on the channel CH5 is 3slot in the second frame.

[0195] In combination with the above examples, the specific process of the above steps S501 and S502 will be described below.

[0196] In the case where the first paging information and the second paging information are different paging information, the network device can send the first paging information at the first paging occasion corresponding to the first paging group on the third channel, and the network device can also send the second paging information at the second paging occasion corresponding to the first paging group on the fourth channel. That is, the network device can split one complete paging information into two different paging information, and map the two different paging information to two paging occasions of the same paging group located on different channels and send them respectively. Correspondingly, the first terminal device receives different paging information at two paging occasions of the same paging group on two different channels.

[0197] In the case where the first paging information and the second paging information are the same paging information, the network device can send the first paging information at the first paging occasion corresponding to the first paging group on the third channel, and the network device can also send the second paging information at the second paging occasion corresponding to the second paging group on the fourth channel. That is, the network device can repeatedly send the same paging information at two paging occasions of the same paging group on different channels. Correspondingly, the first terminal device repeatedly receives the same paging information at two paging occasions of the same paging group on two different channels.

[0198] In the second scenario, the first terminal device belongs to two paging groups, i.e., the second paging group and the third paging group, and the paging occasion corresponding to the second paging group is located in the third channel and the paging occasion corresponding to the third paging group is located in the fourth channel. The second configuration information is described by taking the second scenario as an example. Specifically, the period of the paging occasion of the first paging information on the third channel can be the period of the paging occasion corresponding to the second paging group, and the period of the paging occasion of the second paging information on the fourth channel can be the period of the paging occasion corresponding to the third paging group. The starting time offset of the paging occasion of the first paging information on the third channel can be the starting time offset of the paging occasion corresponding to the second paging group, and the starting time offset of the paging occasion of the second paging information on the fourth channel can be the starting time offset of the paging occasion corresponding to the third paging group.

[0199] For example, referring to FIG. 7, FIG. 7 is a schematic diagram of resources of another channel provided by an embodiment of the present application. As shown in FIG. 7, it is assumed that there are 10 channels, i.e., channel CH0, channel CH1, …, channel CH9, and the channel identifiers corresponding to the 10 channels are 0, 1, …, 9, respectively. It is assumed that the third channel is CH1 and the fourth channel is CH5. It is assumed that one frame includes 10 slots, i.e., slot 0, slot 1, …, slot 9. The second configuration information is described by taking the example that the paging information is sent on the channel CH1 and the channel CH5 in three consecutive frames (i.e., the first frame, the second frame, and the third frame shown in FIG. 7) as an example. Here, the rectangle filled with horizontal bars represents the paging occasion corresponding to the second paging group, and the rectangle filled with vertical bars represents the paging occasion corresponding to the third paging group.

[0200] In combination with the content shown in FIG. 7, the channel identifier information included in the second configuration information can be {1, 5}, the channel period information can be {20slot, 20slot}, and the starting time offset information can be {3slot, 3slot}. Among them, the channel identifier information {1, 5} can be used to indicate that the third channel is channel CH1 and the fourth channel is channel CH5. The channel period information {20slot, 20slot} can be used to indicate that the period of the paging occasion corresponding to the second paging group on the third channel CH1 is 20slot, and the period of the paging occasion corresponding to the third paging group on the fourth channel CH5 is 20slot. The starting time offset information {3slot, 13slot} can be used to indicate that the starting time offset of the paging occasion corresponding to the second paging group on the third channel CH1 is 3slot, and the starting time offset of the paging occasion corresponding to the third paging group on the fourth channel CH5 is 13slot. It can also be understood that the time slot of the first paging occasion corresponding to the second paging group on the channel CH1 is 3slot in the first frame, and the time slot of the first paging occasion corresponding to the third paging group on the channel CH5 is 13slot, or in other words, the time slot of the first paging occasion corresponding to the third paging group on the channel CH5 is 3slot in the second frame.

[0201] In combination with the above example, the specific process of the above steps S501 and S502 in scenario two will be described below.

[0202] In the case that the first paging information and the second paging information are different paging information, the network device can send the first paging information at the first paging occasion corresponding to the second paging group on the third channel, and the network device can also send the second paging information at the first paging occasion corresponding to the third paging group on the fourth channel. That is, the network device can split one complete paging information into two different paging information, and map the two different paging information to the paging occasions corresponding to the two different paging groups on different channels for sending respectively. Correspondingly, the first terminal device receives different paging information at the paging occasions corresponding to the two different paging groups on the two different channels.

[0203] In the case that the first paging information and the second paging information are the same paging information, the network device can send the first paging information at the first paging occasion corresponding to the second paging group on the third channel, and the network device can also send the second paging information at the first paging occasion corresponding to the third paging group on the fourth channel. That is, the network device can repeatedly send the same paging information at the paging occasions corresponding to the two different paging groups on different channels. Correspondingly, the first terminal device repeatedly receives the same paging information at the paging occasions corresponding to the two different paging groups on the two different channels.

[0204] It should be noted that the foregoing describes a case where the first terminal device belongs to two paging groups. In actual implementation, the first terminal device can also belong to three or more paging groups. The specific second configuration information can refer to the second configuration information described above when the first terminal device belongs to two paging groups, and details are not repeated here.

[0205] Optionally, in scenario two, the second configuration information can further include first information, which can be used to indicate a paging group associated with a paging occasion of the first terminal device. It should be noted that the paging occasion of the first terminal device is associated with a paging group, which means that the first terminal device belongs to different paging groups when receiving paging information at different paging occasions.

[0206] For example, it is assumed that the network device is configured with two paging groups, namely paging group PG0 and paging group PG1. In odd paging occasions of the first terminal device, it can belong to the paging group PG0. In even paging occasions of the first terminal device, it can belong to the paging group PG1.

[0207] For example, please refer to FIG. 8, which is a schematic diagram of resources of a channel provided by an embodiment of the present application. As shown in FIG. 8, it is assumed that there are 10 channels, namely channel CH0, channel CH1, …, channel CH9, and the channel identifiers corresponding to the 10 channels are 0, 1, …, 9 respectively. It is assumed that the third channel is CH1 and the fourth channel is CH5. It is assumed that one frame includes 10 slots, namely slot 0, slot 1, …, slot 9. Here, taking the case of transmitting paging information on the channel CH1 and the channel CH5 in the next 3 frames (the first frame, the second frame, and the third frame shown in FIG. 8) as an example, the paging group to which the first terminal device belongs is described. It is assumed that the network device configures 4 paging groups in the communication system, namely paging group PG0, paging group PG1, paging group PG2, and paging group PG3. Here, the long rectangle filled with horizontal bars represents the paging occasion corresponding to the paging group PG0, the long rectangle filled with vertical bars represents the paging occasion corresponding to the paging group PG1, the long rectangle filled with grids represents the paging occasion corresponding to the paging group PG2, and the long rectangle filled with diagonal bars represents the paging occasion corresponding to the paging group PG3.

[0208] Here, the paging occasions corresponding to the paging group PG0 and the paging group PG1 are located on the third channel CH1, the paging occasions corresponding to the paging group PG2 and the paging group PG3 are located on the fourth channel CH5, the period of the paging occasions corresponding to the paging group PG0, the paging group PG1, the paging group PG2 and the paging group PG3 is 20 slots, the starting time offset of the paging occasions corresponding to the paging group PG0 and the paging group PG2 is 3 slots, and the starting time offset of the paging occasions corresponding to the paging group PG1 and the paging group PG3 is 13 slots. The paging occasion in the first frame can be the first paging occasion of the first terminal device, the paging occasion in the second frame can be the second paging occasion of the first terminal device, and the paging occasion in the third frame can be the third paging occasion of the first terminal device.

[0209] In combination with the content shown in FIG. 8, on the odd paging occasions (such as the first paging occasion and the third paging occasion), the paging group to which the first terminal device belongs when receiving the paging information can be the paging group PG0. On the even paging occasions (such as the second paging occasion), the paging group to which the first terminal device belongs when receiving the paging information can be the paging group PG3.

[0210] Alternatively, on the odd paging occasions (such as the first paging occasion and the third paging occasion), the paging group to which the first terminal device belongs when receiving the paging information can be the paging group PG2. On the even paging occasions (such as the second paging occasion), the paging group to which the first terminal device belongs when receiving the paging information can be the paging group PG1.

[0211] It should be noted that the first terminal device can only belong to one paging group on the same paging occasion (or the same time slot in a frame) in a frame. For example, please continue to refer to FIG. 8, on the first paging occasion of the first terminal device, the first terminal device can belong to PG0 or PG2, but it cannot belong to PG0 and PG2 at the same time.

[0212] In an optional implementation, after generating the second configuration information, the network device can send the second configuration information to the first terminal device in the form of broadcasting. Alternatively, the network device can also send the second configuration information to the first terminal device in the form of non-broadcasting, for example, the network device can send the second configuration information to the first terminal device in one or more of RRC signaling, DCI signaling or MAC CE signaling. The embodiments of the present application are not limited in this regard.

[0213] In some possible implementation, after receiving the second configuration information, the first terminal device can determine the third channel, the fourth channel, the transmission period of the first paging information on the third channel and the transmission period of the second paging information on the fourth channel based on the content contained in the second configuration information.

[0214] Optionally, the first terminal device can further determine, based on the content contained in the second configuration information, a starting time offset of the paging occasion of the first paging information on the third channel, and a starting time offset of the paging occasion of the second paging information on the fourth channel.

[0215] It should be noted that the channel identification information, the periodicity information, the starting time offset information, and the transmission power information of the channel can also be understood as information for transmitting the paging information on the channel. In possible scenarios, the information for transmitting the paging information on the channel can not be configured by the network device, but can be agreed by a protocol. The embodiments of the present application do not limit this.

[0216] Optionally, the communication method shown in FIG. 5 can be applied to a narrowband communication system, and the channel bandwidth in the narrowband communication system can be less than or equal to 1 megahertz (MHz). In this case, the communication system shown in FIG. 1 or FIG. 2 can be a narrowband communication system. Specifically, the channel bandwidth of the third channel and the fourth channel can be less than or equal to 1 MHz.

[0217] The communication method provided by the embodiments of the present application is described in detail above in combination with FIG. 3 to FIG. 8. The communication device provided by the embodiments of the present application will be described in detail below in combination with FIG. 9 and FIG. 10. It should be understood that the description of the embodiments of the communication device corresponds to the description of the embodiments of the communication method, and therefore, the parts not described in detail can be referred to the method embodiments described above.

[0218] Please refer to FIG. 9, which is a structural schematic diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 9, the communication device 900 can include a processing unit 901 and a transceiver unit 902.

[0219] In some possible implementation manners, the communication device 900 can correspond to the network device described above, or a component (such as a circuit, a chip, or a chip system) configured in the network device.

[0220] In a specific implementation, the processing unit 901 is configured to generate a first synchronization signal and a second synchronization signal. The transceiver unit 902 is configured to transmit the first synchronization signal through a first channel. The transceiver unit 902 is further configured to transmit the second synchronization signal through a second channel. Here, the frequency domain positions of the first channel and the second channel are different.

[0221] In a possible implementation manner, the transceiver unit 902 is further configured to transmit first configuration information. Here, the first configuration information includes channel identification information of the first channel, periodicity information of the first channel, channel identification information of the second channel, and periodicity information of the second channel. The first configuration information is used to configure the first channel and the second channel. The periodicity information of the first channel is used to indicate the period of the first synchronization signal on the first channel, and the periodicity information of the second channel is used to indicate the period of the second synchronization signal on the second channel.

[0222] In a possible implementation, the first configuration information further includes starting time offset information and transmit power information of the first channel, and starting time offset information and transmit power information of the second channel. Here, the starting time offset information of the first channel is used to indicate a starting time offset amount of the first synchronization signal on the first channel, and the starting time offset information of the second channel is used to indicate a starting time offset amount of the second synchronization signal on the second channel. The transmit power information of the first channel is used to indicate a transmit power of the first synchronization signal on the first channel, and the transmit power information of the second channel is used to indicate a transmit power of the second synchronization signal on the second channel.

[0223] In some possible implementation, the communication apparatus 900 can correspond to the first terminal device or a component (such as a circuit, a chip or a chip system) configured in the first terminal device.

[0224] In specific implementation, the transceiver unit 902 is configured to receive the first synchronization signal through the first channel. The transceiver unit 902 is further configured to receive the second synchronization signal through the second channel. Here, the frequency domain positions of the first channel and the second channel are different. The processing unit 901 is configured to acquire the first signal according to the first synchronization signal and the second synchronization signal. The processing unit 901 is further configured to perform time-frequency synchronization according to the first signal.

[0225] In a possible implementation, the transceiver unit 902 is further configured to receive the first configuration information. Here, the first configuration information includes channel identification information and periodicity information of the first channel, and channel identification information and periodicity information of the second channel. The first configuration information is used to configure the first channel and the second channel. The periodicity information of the first channel is used to indicate a periodicity of the first synchronization signal on the first channel, and the periodicity information of the second channel is used to indicate a periodicity of the second synchronization signal on the second channel.

[0226] In a possible implementation, the first configuration information further includes starting time offset information and transmit power information of the first channel, and starting time offset information and transmit power information of the second channel. Here, the starting time offset information of the first channel is used to indicate a starting time offset amount of the first synchronization signal on the first channel, and the starting time offset information of the second channel is used to indicate a starting time offset amount of the second synchronization signal on the second channel. The transmit power information of the first channel is used to indicate a transmit power of the first synchronization signal on the first channel, and the transmit power information of the second channel is used to indicate a transmit power of the second synchronization signal on the second channel.

[0227] In some possible implementation, the communication apparatus 900 can correspond to the network device or a component (such as a circuit, a chip or a chip system) configured in the network device.

[0228] In a possible implementation, the processing unit 901 is configured to generate first paging information and second paging information. The transceiver unit 902 is configured to transmit the first paging information on a third channel. The transceiver unit 902 is further configured to transmit the second paging information on a fourth channel. Here, the first paging information and the second paging information are both used to initiate paging to the first terminal device.

[0229] In a possible implementation, the transceiver unit 902 is further configured to transmit second configuration information. Here, the second configuration information includes channel identification information, paging occasion information, and periodicity information of the third channel, and channel identification information, paging occasion information, and periodicity information of the fourth channel. The second configuration information is used to configure the third channel and the fourth channel. The paging occasion information of the third channel is used to indicate a paging occasion of the first paging information on the third channel, and the paging occasion information of the fourth channel is used to indicate a paging occasion of the second paging information on the fourth channel. The periodicity information of the third channel is used to indicate a periodicity of the paging occasion of the first paging information on the third channel, and the periodicity information of the fourth channel is used to indicate a periodicity of the paging occasion of the second paging information on the fourth channel.

[0230] In a possible implementation, the second configuration information further includes start time offset information of the third channel and start time offset information of the fourth channel. Here, the start time offset information of the third channel is used to indicate a start time offset amount of the paging occasion of the first paging information on the third channel, and the start time offset information of the fourth channel is used to indicate a start time offset amount of the paging occasion of the second paging information on the fourth channel.

[0231] In a possible implementation, in a case where the first terminal device belongs to a first paging group, the paging occasion of the first paging information on the third channel is a paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel is a paging occasion corresponding to the first paging group. The periodicity of the paging occasion of the first paging information on the third channel is a periodicity of a paging occasion corresponding to the first paging group, and the periodicity of the paging occasion of the second paging information on the fourth channel is a periodicity of a paging occasion corresponding to the first paging group.

[0232] In a possible implementation, the start time offset amount of the paging occasion of the first paging information on the third channel is a start time offset amount of a paging occasion corresponding to the first paging group, and the start time offset amount of the paging occasion of the second paging information on the fourth channel is a start time offset amount of a paging occasion corresponding to the first paging group.

[0233] In a possible implementation, in a case that the first terminal device belongs to the second paging group and the third paging group, and the paging occasion corresponding to the second paging group is located on the third channel and the paging occasion corresponding to the third paging group is located on the fourth channel, a period of the paging occasion of the first paging information on the third channel is a period of the paging occasion corresponding to the second paging group, and a period of the paging occasion of the second paging information on the fourth channel is a period of the paging occasion corresponding to the third paging group.

[0234] In a possible implementation, a starting time offset of the paging occasion of the first paging information on the third channel is a starting time offset of the paging occasion corresponding to the second paging group, and a starting time offset of the paging occasion of the second paging information on the fourth channel is a starting time offset of the paging occasion corresponding to the third paging group.

[0235] In a possible implementation, the second configuration information further includes first information. Here, the first information is used to indicate a paging group associated with a paging occasion of the first terminal device.

[0236] In some possible implementations, the communication apparatus 900 can correspond to the first terminal device or a component (such as a circuit, a chip, or a chip system) configured in the first terminal device.

[0237] In specific implementations, the transceiver unit 902 is configured to receive the first paging information on the third channel. The transceiver unit 902 is further configured to receive the second paging information on the fourth channel. Here, the first paging information and the second paging information are both used to initiate paging to the first terminal device. The processing unit 901 is configured to acquire third paging information according to the first paging information and the second paging information. Here, the third paging information is used by the first terminal device to determine whether the first terminal device is paged.

[0238] In a possible implementation, the transceiver unit 902 is further configured to receive second configuration information. Here, the second configuration information includes channel identification information, paging occasion information, and period information of the third channel, and channel identification information, paging occasion information, and period information of the fourth channel. The second configuration information is used to configure the third channel and the fourth channel. The paging occasion information of the third channel is used to indicate the paging occasion of the first paging information on the third channel, and the paging occasion information of the fourth channel is used to indicate the paging occasion of the second paging information on the fourth channel. The period information of the third channel is used to indicate a period of the paging occasion of the first paging information on the third channel, and the period information of the fourth channel is used to indicate a period of the paging occasion of the second paging information on the fourth channel.

[0239] In a possible implementation, the second configuration information further includes starting time offset information of the third channel and starting time offset information of the fourth channel. Here, the starting time offset information of the third channel is used to indicate a starting time offset amount of the paging occasion of the first paging information on the third channel, and the starting time offset information of the fourth channel is used to indicate a starting time offset amount of the paging occasion of the second paging information on the fourth channel.

[0240] In a possible implementation, in a case where the first terminal device belongs to the first paging group, the paging occasion of the first paging information on the third channel is a paging occasion corresponding to the first paging group, and the paging occasion of the second paging information on the fourth channel is a paging occasion corresponding to the first paging group. A period of the paging occasion of the first paging information on the third channel is a period of the paging occasion corresponding to the first paging group, and a period of the paging occasion of the second paging information on the fourth channel is a period of the paging occasion corresponding to the first paging group.

[0241] In a possible implementation, a starting time offset amount of the paging occasion of the first paging information on the third channel is a starting time offset amount of the paging occasion corresponding to the first paging group, and a starting time offset amount of the paging occasion of the second paging information on the fourth channel is a starting time offset amount of the paging occasion corresponding to the first paging group.

[0242] In a possible implementation, in a case where the first terminal device belongs to the second paging group and the third paging group, and the paging occasion corresponding to the second paging group is located on the third channel and the paging occasion corresponding to the third paging group is located on the fourth channel, a period of the paging occasion of the first paging information on the third channel is a period of the paging occasion corresponding to the second paging group, and a period of the paging occasion of the second paging information on the fourth channel is a period of the paging occasion corresponding to the third paging group.

[0243] In a possible implementation, a starting time offset amount of the paging occasion of the first paging information on the third channel is a starting time offset amount of the paging occasion corresponding to the second paging group, and a starting time offset amount of the paging occasion of the second paging information on the fourth channel is a starting time offset amount of the paging occasion corresponding to the third paging group.

[0244] In a possible implementation, the second configuration information further includes first information. Here, the first information is used to indicate a paging group associated with a paging occasion of the first terminal device.

[0245] Please refer to FIG. 10, which is a structural schematic diagram of another communication apparatus provided in the embodiments of the present application. The communication apparatus 1000 can be used to implement the operations performed by the network device or the first terminal device in the above embodiments, or the communication apparatus 1000 can be the network device or the first terminal device described above. The communication apparatus 1000 includes a processor 1001, a memory 1002 and a bus system 1003.

[0246] The memory 1002 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable PROM (EPROM) or a compact disc read-only memory (CD-ROM). The memory 1002 is configured to store relevant instructions and data. The memory 1002 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set thereof:

[0247] Operation instructions: include various operation instructions, which are used to implement various operations.

[0248] Operating system: includes various system programs, which are used to implement various basic services and process hardware-based tasks.

[0249] Only one memory is shown in FIG. 10, and of course, the memory can also be set to multiple memories according to the needs.

[0250] In a possible implementation, the communication apparatus 1000 can only include the processor 1001 and the bus system 1003, i.e., does not include the memory 1002.

[0251] The communication apparatus 1000 can further include a transceiver 1004. The transceiver 1004 can be a communication module or a transceiver circuit. In the embodiments of the present application, the transceiver 1004 is configured to perform the transceiving operations of the messages described above.

[0252] The processor 1001 can be at least one, specifically can be a controller, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. The processor 1001 can also be a combination of computing functions, such as one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0253] In a specific application, various components of the communication apparatus 1000 are coupled by a bus system 1003, which can include a data bus, a power bus, a control bus, and a state signal bus, etc. However, for the sake of clarity, the various buses are shown as the bus system 1003 in FIG. 10. Only a few of the many possible buses are shown in FIG. 10 for ease of illustration.

[0254] In a specific implementation, the communication apparatus 1000 can perform the steps of the method performed by the network device or the first terminal device in the above embodiments. Specifically, when the communication apparatus 1000 is used to implement each step of the communication method performed by the network device or the first terminal device in the embodiments, the processor 1001 can implement the functions of the above processing unit 901, and the transceiver 1004 can implement the functions of the above transceiving unit 902.

[0255] It should be noted that in actual application, the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method embodiments described above can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The processor described above can be a general processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can be any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as hardware code processing executed by the processor, or executed by a combination of hardware and software modules in the code processing processor. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, or other mature storage media in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0256] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be ROM, programmable read-only memory (PROM), EPROM, electrically EPROM (EEPROM) or flash memory. The volatile memory can be RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM can be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct memory bus random access memory (DR RAM). It should be noted that the memory described in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0257] The present application also provides a computer readable medium having a computer program stored thereon, which, when executed by a computer, implements the method steps performed by the network device or the first terminal device in the above embodiments.

[0258] The present application also provides a computer program product, which, when executed by a computer, implements the method steps performed by the network device or the first terminal device in the above embodiments.

[0259] The present application also provides a chip, which includes at least one processor. The at least one processor is configured to execute computer-executed instructions to enable a device in which the chip is installed to implement the method steps performed by the network device or the first terminal device in the above embodiments.

[0260] Optionally, the chip can further include an interface circuit. The interface circuit is configured to receive computer-executed instructions and transmit them to the processor.

[0261] The present application also provides a chip system, which includes a processor configured to enable a device in which the chip system is installed to implement the method steps performed by the network device or the first terminal device in the above embodiments, such as generating or processing data and / or information involved in the above methods. In a possible design, the chip system further includes a memory configured to store program instructions and data necessary for the data transmitting device. The chip system can be composed of a chip, or include a chip and other discrete devices.

[0262] Optionally, the chip system can further include an interface circuit. The interface circuit can be configured to receive computer-executed instructions and transmit them to the processor.

[0263] Please refer to FIG. 11, which is a structural schematic diagram of another communication device provided in the embodiments of the present application. The communication device 1100 can include a processor 1101 and an interface circuit 1102. The interface circuit 1102 can be configured to receive signals from other communication devices outside the communication device 1100 and transmit them to the processor 1101, or transmit signals from the processor 1101 to other communication devices outside the communication device 1100. The processor 1101 can be configured to execute computer programs or instructions through a logic circuit to implement the communication method described in the foregoing embodiments.

[0264] In some possible designs, the communication device 1100 can be the first terminal device described above, or a device including the first terminal device described above, or a device included in the first terminal device described above, such as a chip system. The communication device 1100 can also be the network device described above, or a device of the network device described above, or a device included in the network device described above.

[0265] In the method embodiments described above, all or part of the method can be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the method can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL) or wireless (such as infrared, wireless, microwave, etc.)) way. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available media sets. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as high-density digital video disc (digital video disc, DVD), or semiconductor media (such as solid state disk (solid state disk, SSD) and the like.

[0266] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0267] It can be understood that the various numerical numbers 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 its function and inherent logic.

[0268] The above only describes the preferred embodiments of the technical scheme of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A communication method characterized by comprising: The method comprises: sending a first synchronization signal through a first channel; sending a second synchronization signal through a second channel, wherein the frequency domain positions of the first channel and the second channel are different.

2. The method of claim 1, wherein, The method further comprises: sending first configuration information, wherein the first configuration information comprises channel identification information and periodicity information of the first channel, and channel identification information and periodicity information of the second channel, the first configuration information being used for configuring the first channel and the second channel, the periodicity information of the first channel being used for indicating the period of the first synchronization signal on the first channel, and the periodicity information of the second channel being used for indicating the period of the second synchronization signal on the second channel.

3. A communication method characterized by comprising: The method comprises: receiving a first synchronization signal through a first channel; receiving a second synchronization signal through a second channel, wherein the frequency domain positions of the first channel and the second channel are different; acquiring a first signal according to the first synchronization signal and the second synchronization signal; performing time-frequency synchronization according to the first signal.

4. The method of claim 3, wherein, The method further comprises: receiving first configuration information, wherein the first configuration information comprises channel identification information and periodicity information of the first channel, and channel identification information and periodicity information of the second channel, the first configuration information being used for configuring the first channel and the second channel, the periodicity information of the first channel being used for indicating the period of the first synchronization signal on the first channel, and the periodicity information of the second channel being used for indicating the period of the second synchronization signal on the second channel.

5. The method according to claim 2 or 4, characterized in that, The first configuration information further comprises starting time offset information and transmission power information of the first channel, and starting time offset information and transmission power information of the second channel; the starting time offset information of the first channel is used for indicating the starting time offset of the first synchronization signal on the first channel, the starting time offset information of the second channel is used for indicating the starting time offset of the second synchronization signal on the second channel, the transmission power information of the first channel is used for indicating the transmission power of the first synchronization signal on the first channel, and the transmission power information of the second channel is used for indicating the transmission power of the second synchronization signal on the second channel.

6. The method according to any one of claims 1 to 5, characterized in that, The method is applied to a narrowband communication system, and the channel bandwidth in the narrowband communication system is less than or equal to 1 MHz.

7. A communication method characterized by comprising: The method comprises: sending first paging information on a third channel; sending second paging information on a fourth channel, wherein the first paging information and the second paging information are both used for initiating paging to a first terminal device.

8. The method of claim 7, wherein, The method further comprises: sending second configuration information, wherein the second configuration information comprises channel identification information, paging occasion information and periodicity information of the third channel, and channel identification information, paging occasion information and periodicity information of the fourth channel, the second configuration information being used for configuring the third channel and the fourth channel, the paging occasion information of the third channel being used for indicating a paging occasion of the first paging information on the third channel, the paging occasion information of the fourth channel being used for indicating a paging occasion of the second paging information on the fourth channel, the periodicity information of the third channel being used for indicating a periodicity of the paging occasion of the first paging information on the third channel, and the periodicity information of the fourth channel being used for indicating a periodicity of the paging occasion of the second paging information on the fourth channel.

9. A communication method characterized by comprising: The method comprises: receiving first paging information on a third channel; receiving second paging information on a fourth channel, wherein the first paging information and the second paging information are both used for initiating paging to a first terminal device; obtaining third paging information according to the first paging information and the second paging information, wherein the third paging information is used for the first terminal device to determine whether it is paged.

10. The method of claim 9, wherein, The method further comprises: receiving second configuration information, wherein the second configuration information comprises channel identification information, paging occasion information and periodicity information of the third channel, and channel identification information, paging occasion information and periodicity information of the fourth channel, the second configuration information being used for configuring the third channel and the fourth channel, the paging occasion information of the third channel being used for indicating a paging occasion of the first paging information on the third channel, the paging occasion information of the fourth channel being used for indicating a paging occasion of the second paging information on the fourth channel, the periodicity information of the third channel being used for indicating a periodicity of the paging occasion of the first paging information on the third channel, and the periodicity information of the fourth channel being used for indicating a periodicity of the paging occasion of the second paging information on the fourth channel.

11. The method according to claim 8 or 10, characterized in that, The second configuration information further comprises start time offset information of the third channel and start time offset information of the fourth channel, the start time offset information of the third channel being used for indicating a start time offset amount of the paging occasion of the first paging information on the third channel, and the start time offset information of the fourth channel being used for indicating a start time offset amount of the paging occasion of the second paging information on the fourth channel.

12. The method of claim 11, wherein, The first terminal device belongs to a first paging group, the paging occasion of the first paging information on the third channel is a paging occasion corresponding to the first paging group, the paging occasion of the second paging information on the fourth channel is a paging occasion corresponding to the first paging group, the periodicity of the paging occasion of the first paging information on the third channel is a periodicity of a paging occasion corresponding to the first paging group, and the periodicity of the paging occasion of the second paging information on the fourth channel is a periodicity of a paging occasion corresponding to the first paging group.

13. The method of claim 12, wherein, The first paging information has a starting time offset of a paging occasion on the third channel, and the second paging information has a starting time offset of a paging occasion on the fourth channel.

14. The method of claim 11, wherein, The first terminal device belongs to a second paging group and a third paging group, a paging occasion corresponding to the second paging group is located on the third channel, and a paging occasion corresponding to the third paging group is located on the fourth channel. The first paging information has a periodicity of a paging occasion on the third channel, and the second paging information has a periodicity of a paging occasion on the fourth channel.

15. The method of claim 14, wherein, The first paging information has a starting time offset of a paging occasion on the third channel, and the second paging information has a starting time offset of a paging occasion on the fourth channel.

16. The method according to claim 14 or 15, characterized in that The second configuration information further includes first information used to indicate a paging group associated with a paging occasion of the first terminal device.

17. The method according to any one of claims 7-16, characterized in that, The method is applied to a narrowband communication system, and a channel bandwidth in the narrowband communication system is less than or equal to 1 megahertz.

18. A communications device, characterized by The communication device is used to implement the communication method in any one of claims 1-2 or 5-6, or the communication method in any one of claims 3-6, or the communication method in any one of claims 7, 8 or 11-17, or the communication method in any one of claims 9-17.

19. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and when the computer program is executed, the communication method in any one of claims 1-2 or 5-6, or the communication method in any one of claims 3-6, or the communication method in any one of claims 7, 8 or 11-17, or the communication method in any one of claims 9-17 is implemented.

20. A chip system, characterized by The processor is used to execute computer execution instructions to enable a device installed with the chip system to perform the communication method in any one of claims 1-2 or 5-6, or the communication method in any one of claims 3-6, or the communication method in any one of claims 7, 8 or 11-17, or the communication method in any one of claims 9-17. The chip system further includes an interface circuit used to receive the computer execution instructions and transmit to the processor.

21. The chip system according to claim 20, wherein The computer program product is used to execute the communication method in any one of claims 1-2 or 5-6, or the communication method in any one of claims 3-6, or the communication method in any one of claims 7, 8 or 11-17, or the communication method in any one of claims 9-17.

22. A computer program product, characterised in that, ​ 23. A communications device, characterized by comprising at least one processor for executing a computer program stored in a memory to cause the communication device to perform the communication method of any one of claims 1-2 or 5-6, or the communication method of any one of claims 3-6, or the communication method of any one of claims 7, 8, or 11-17, or the communication method of any one of claims 9-17.

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