Communication method and communication apparatus
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-02-06
- Publication Date
- 2026-08-13
Smart Images
Figure CN2026077654_13082026_PF_FP_ABST
Abstract
Description
Communication methods and communication devices
[0001] This application claims priority to Chinese Patent Application No. 202510135062.1, filed on February 6, 2025, entitled "Communication Method and Communication Device", the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of communications, specifically to a communication method and a communication device. Background Technology
[0003] During the initial access process, the terminal device can initiate a random access procedure based on the cell system messages to establish a connection with the network. System messages are typically sent periodically; therefore, if a system message cannot be successfully demodulated, the terminal device can receive the system message from the next cycle. However, in cases of poor demodulation performance, the terminal device may need multiple cycles to obtain system messages, resulting in significant access latency. Summary of the Invention
[0004] This application provides a communication method and communication device that can reduce the access latency of terminal devices.
[0005] In a first aspect, embodiments of this application provide a communication method that can be applied to the terminal side, such as a terminal or a component in the terminal (e.g., a module, a communication module, a circuit or chip responsible for communication functions (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip or system-in-package (SIP) chip containing a modem core)), or a logical node, logical module, or software that can implement all or part of the functions of a communication device. In this method: a first synchronization signal block (synchronization signal / physical broadcast channel block, SS / PBCH block or SSB) and a second SSB are received; first information is determined based on the first SSB and / or the second SSB, the first information indicating that the information carried by the first physical downlink control channel (PDCCH) and the information carried by the second PDCCH are the same, the first PDCCH is used to schedule the first physical downlink shared channel (PDSCH) carrying the first system information block (SIB), the second PDCCH is used to schedule the second PDSCH carrying the second SIB, the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB; downlink control information (DCI) carried by the first PDCCH is determined based on the first PDCCH and the second PDCCH.
[0006] For example, this communication method can be applied to non-terrestrial networks (NTN) scenarios, as well as other communication scenarios, such as existing communication systems and future communication systems.
[0007] For example, the first information may be the same as the information carried by the first PDCCH and the information carried by the second PDCCH.
[0008] Alternatively, the first information could be support for merging and receiving the first PDCCH and the second PDCCH.
[0009] Alternatively, the first information can be information that supports determining the information carried in the first PDCCH based on the first PDCCH and the second PDCCH, i.e., the first DCI.
[0010] Alternatively, the first information may be that the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0011] Alternatively, the first information can be the same as the original bits carried by the first PDCCH and the original bits carried by the second PDCCH.
[0012] It should be understood that the contents of the various types of first information mentioned above are interchangeable, and this application does not impose any restrictions on this.
[0013] The aforementioned combined reception, also known as joint reception, combined demodulation, or joint demodulation, can be understood as determining the first DCI carried in the first PDCCH based on the first PDCCH and the second PDCCH. Several combined reception methods are described below as examples. It should be understood that this application does not limit the scope of the application.
[0014] For example, the signals from the first PDCCH and the second PDCCH can be merged first, and then the merged result can be demodulated to obtain the DCI carried in the first PDCCH. This application does not limit the signal merging method; for example, it can be signal superposition or weighted superposition. Since the signal energy increases after merging, or in other words, the useful information in the signal increases, demodulating the merged result helps improve demodulation performance.
[0015] For example, the first PDCCH and the second PDCCH can be demodulated separately, and then the demodulation results of the first PDCCH and the second PDCCH can be combined to obtain the DCI carried in the first PDCCH. Due to factors such as the difference in signal-to-noise ratio during the transmission of the first PDCCH and the second PDCCH, the parts of the first PDCCH that cannot be successfully demodulated may be different from those of the second PDCCH. Therefore, by combining the demodulation results of the first PDCCH and the second PDCCH, it is helpful to obtain the DCI carried in the first PDCCH, thereby helping to improve demodulation performance.
[0016] For example, the first information may be carried in the first SSB and / or the second SSB, or the first information may be determined based on information in the first SSB and / or the second SSB. For example, the first information may be determined based on the frequency point where the first SSB and / or the second SSB is located.
[0017] Since the first information that a terminal device can obtain during the initial access process is the SSB, determining the first information based on the SSB helps the terminal device to know whether the system supports merging and receiving system messages within a cycle before obtaining system messages, thereby helping to reduce access latency.
[0018] On the one hand, embodiments of this application may enable the information carried by the first PDCCH to be the same as the information carried by the second PDCCH, so as to support the combined reception of the first PDCCH and the second PDCCH, thereby helping to improve the demodulation performance of the first PDCCH and the second PDCCH.
[0019] On the other hand, the embodiments of this application enable the terminal device to receive PDCCHs used for scheduling PDSCHs carrying different SIBs within a cycle by means of the first information mentioned above, which helps to improve the demodulation performance of PDCCHs and thus helps to reduce the access latency of the terminal device.
[0020] In some embodiments, determining the downlink control information (DCI) carried by the first PDCCH based on the first PDCCH and the second PDCCH includes: receiving the first PDCCH; receiving the second PDCCH if the first PDCCH cannot be successfully demodulated; and determining the DCI carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0021] In other words, the first PDCCH can be demodulated first. If the first PDCCH is successfully demodulated, there is no need to receive the second PDCCH. If the first PDCCH cannot be successfully demodulated, the second PDCCH can be received, and the first DCI can be determined based on the first PDCCH and the second PDCCH.
[0022] For example, the terminal device can determine whether the first PDCCH can be successfully demodulated based on the relationship between the signal-to-noise ratio of the first PDCCH and the threshold value. For example, when the signal-to-noise ratio of the first PDCCH is greater than or equal to the threshold value, the first PDCCH can be successfully demodulated, and when the signal-to-noise ratio of the first PDCCH is less than the threshold value, the first PDCCH cannot be successfully demodulated.
[0023] Compared with directly merging and receiving the first PDCCH and the second PDCCH, this scheme eliminates the need to receive the second PDCCH if the first PDCCH is successfully demodulated, thus saving power consumption for receiving the second PDCCH and resources for demodulating the second PDCCH.
[0024] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, the first information is further used to indicate that the first SIB and the second SIB are the same.
[0025] The information carried by the first PDSCH is the same as that carried by the second PDSCH, which enables the terminal device to receive the first PDSCH and the second PDSCH in combination, thereby helping to improve the demodulation performance of PDSCH and thus help to reduce access latency.
[0026] By reusing the first information mentioned above, no additional information is needed to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, which helps to save resource overhead.
[0027] In some embodiments, the method further includes: determining second information based on the first SSB and / or the second SSB, the second information being used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; and determining the first SIB based on the first PDSCH and the second PDSCH.
[0028] By indicating that the information carried by the first PDSCH is the same as that carried by the second PDSCH, the PDSCH can be configured independently to support merged reception, thereby helping to improve the flexibility of the system.
[0029] In some embodiments, determining the first information based on the first SSB and / or the second SSB includes: determining the first information based on a first bit associated with the first SSB and a second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values; wherein the first bit and the second bit being both first values are used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0030] Alternatively, the value of the first bit and the value of the second bit are both the first value, which is used to characterize support for the combined reception of the first PDCCH and the second PDCCH.
[0031] Conversely, if the value of the first bit and the value of the second bit are not the first value, but the third value, it is used to indicate that the information carried by the first PDCCH is different from the information carried by the second PDCCH, or to indicate that the combined reception of the first PDCCH and the second PDCCH is not supported.
[0032] For example, the first bit and the second bit can be newly added bits in the SSB, such as the first bit and the second bit can be carried in the extended bits of the master information block (MIB).
[0033] In this embodiment, the values of the first and second bits are used to indicate whether the first and second SSBs are the same. This allows for configuration of whether the information carried by the related channels of different SSBs associated with the SIBs is the same, improving system flexibility. For ease of description, the PDCCH used to schedule the PDSCH carrying the SIB, and / or the PDSCH carrying the SIB, are referred to as the related channels of the SIB.
[0034] In addition, multiple SSBs can carry the first bit and the second bit to ensure that all terminal devices within the coverage area can obtain the first information, thus providing support for downlink enhancement of terminal devices within the coverage area.
[0035] In some embodiments, determining the first information based on the first SSB and / or the second SSB includes: determining the first information based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; wherein the first identifier being the same as the second identifier is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0036] Conversely, the first identifier and the second identifier are different to indicate that the information carried by the first PDCCH is different from that carried by the second PDCCH, or to indicate that the combined reception of the first PDCCH and the second PDCCH is not supported.
[0037] For example, the first identifier and the second identifier can be represented by a single bit, such as a reserved bit in the MIB or a cell access denied field, which helps to save indication resources.
[0038] For example, the first identifier and the second identifier can be represented by multiple bits. In this case, other values of the aforementioned multiple bits can also be used to configure the information carried by the related channels of SIBs associated with other SSBs besides the first SSB and the second SSB, which is the same, thus providing high flexibility.
[0039] In some embodiments, the first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
[0040] The second identifier is carried in the remaining bits of a plurality of bits, excluding the bits indicating the second SSB index.
[0041] This scheme is applicable to scenarios where the terminal device operates in frequency range (FR) 1. Since the index indicating the SSB in the FR1 scenario only requires the lower 3 bits, the middle 3 bits of the index indicating the SSB can also be reused to carry the first and second identifiers, which helps to save indicator resources and reduce overhead.
[0042] In some embodiments, the first SSB and the second SSB belong to the same SSB burst set. Determining the first information based on the first SSB and / or the second SSB includes: determining the first information based on a third bit in the first SSB, wherein the value of the third bit is a second value; wherein the value of the third bit as a second value is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0043] Conversely, the third bit value is not the second value, which is used to indicate that the information carried by the related channels of the SIBs associated with the SSBs in the burst set to which the first SSB belongs is different.
[0044] The third bit allows for the configuration of whether the information carried by the relevant channels of multiple SSBs associated with a single SSB burst is identical, thus helping to save configuration resources. For example, the third bit can be a reserved bit in the MIB or a cell access prohibition field, eliminating the need to extend the SSB and thus reducing indication overhead.
[0045] In some embodiments, determining the first information based on the first SSB and / or the second SSB includes: determining the first information based on the global synchronization channel number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB, wherein the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to a first GSCN group; wherein, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belonging to the first GSCN group is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0046] Alternatively, at least one of the GSCNs corresponding to the center frequency of the first SSB and the GSCNs corresponding to the center frequency of the second SSB does not belong to the first GSCN group, thus the information carried by the first PDCCH is different from the information carried by the second PDCCH.
[0047] By using the GSCN number corresponding to the center frequency of the SSB to indicate whether the information carried by the first PDCCH is the same as that carried by the second PDCCH, the terminal side can enable the information carried by the first PDCCH to be the same as that carried by the second PDCCH without adding additional indication information, thus helping to save indication overhead. In addition, since the GSCN corresponding to the center frequency of the SSB can be obtained during the SSB search process, this scheme can directly reuse the GSCN, making it simple to implement.
[0048] In some embodiments, the information carried by the first PDCCH and the information carried by the second PDCCH are the same, including: the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0049] In other words, the first DCI is the same as the second DCI, wherein the first PDCCH is used to carry the first DCI and the second PDCCH is used to carry the second DCI.
[0050] For example, the first DCI being the same as the second DCI may include a first offset between the start position of the time-domain resource of the first PDSCH and the start position of the time-domain resource of the first PDCCH, which is the same as a second offset between the start position of the time-domain resource of the second PDSCH and the start position of the time-domain resource of the second PDCCH.
[0051] For example, the fact that the first DCI and the second DCI are the same may include that the time domain length of the time domain resources of the first PDSCH is the same as the time domain length of the time domain resources of the second PDSCH.
[0052] For example, the fact that the first DCI and the second DCI are the same may include that the frequency domain resource size of the first PDSCH is the same as that of the second PDSCH.
[0053] It should be understood that the first DCI is the same as the second DCI, and may include one or more of the examples above.
[0054] Furthermore, the modulation and coding scheme of the first PDCCH is the same as that of the second PDCCH, which supports demodulation of the combined signal of the first PDCCH and the second PDCCH. Since the signal energy increases after signal combining, or in other words, the useful information in the signal increases, demodulating the combined signal helps to improve demodulation performance.
[0055] Secondly, embodiments of this application provide a communication method that can be applied to the network side, such as network devices or components within network devices (e.g., modules, communication modules, circuits or chips responsible for communication functions (e.g., modem chips, also known as baseband chips, or SoC chips or SIP chips containing modem cores)). It can also be a logic node, logic module, or software capable of implementing all or part of the communication device functions. In this method: a first synchronization signal block (SSB) and a second SSB are transmitted; wherein the first SSB and / or the second SSB are used to determine first information, the first information indicating that the information carried by the first physical downlink control channel (PDCCH) and the information carried by the second PDCCH are the same; the first PDCCH is used to schedule the first physical downlink shared channel (PDSCH) carrying the first system message block (SIB); the second PDCCH is used to schedule the second PDSCH carrying the second SIB; the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB.
[0056] For example, this communication method can be applied to NTN scenarios. In other words, the network device can be a non-terrestrial network device. Specifically, some or all of the network device can be deployed on satellites, flight platforms, hot air balloons, aircraft, and unmanned aerial vehicle (UAV) systems, meaning that satellites, flight platforms, hot air balloons, aircraft, and UAV systems can implement some or all of the functions of the network device.
[0057] For example, the first information may be the same as the information carried by the first PDCCH and the information carried by the second PDCCH.
[0058] Alternatively, the first information could be support for merging and receiving the first PDCCH and the second PDCCH.
[0059] Alternatively, the first information can be information that supports determining the information carried in the first PDCCH based on the first PDCCH and the second PDCCH, i.e., the first DCI.
[0060] Alternatively, the first information may be that the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0061] Alternatively, the first information can be the same as the original bits carried by the first PDCCH and the original bits carried by the second PDCCH.
[0062] It should be understood that the contents of the various types of first information mentioned above are interchangeable, and this application does not impose any restrictions on this.
[0063] The aforementioned combined reception, also known as joint reception, combined demodulation, or joint demodulation, can be understood as determining the first DCI carried in the first PDCCH based on the first PDCCH and the second PDCCH. Several combined reception methods are described below as examples. It should be understood that this application does not limit the scope of the application.
[0064] For example, the signals from the first PDCCH and the second PDCCH can be merged first, and then the merged result can be demodulated to obtain the DCI carried in the first PDCCH. This application does not limit the signal merging method; for example, it can be signal superposition or weighted superposition. Since the signal energy increases after merging, or in other words, the useful information in the signal increases, demodulating the merged result helps improve demodulation performance.
[0065] For example, the first PDCCH and the second PDCCH can be demodulated separately, and then the demodulation results of the first PDCCH and the second PDCCH can be combined to obtain the DCI carried in the first PDCCH. Due to factors such as the difference in signal-to-noise ratio during the transmission of the first PDCCH and the second PDCCH, the parts of the first PDCCH that cannot be successfully demodulated may be different from those of the second PDCCH. Therefore, by combining the demodulation results of the first PDCCH and the second PDCCH, it is helpful to obtain the DCI carried in the first PDCCH, thereby helping to improve demodulation performance.
[0066] For example, the first information may be carried in the first SSB and / or the second SSB, or the first information may be determined based on information in the first SSB and / or the second SSB. For example, the first information may be determined based on the frequency point where the first SSB and / or the second SSB is located.
[0067] Since the first information that a terminal device can obtain during the initial access process is the SSB, determining the first information based on the SSB helps the terminal device to know whether the system supports merging and receiving system messages within a cycle before obtaining system messages, thereby helping to reduce access latency.
[0068] On the one hand, embodiments of this application may enable the information carried by the first PDCCH to be the same as the information carried by the second PDCCH, so as to support the combined reception of the first PDCCH and the second PDCCH, thereby helping to improve the demodulation performance of the first PDCCH and the second PDCCH.
[0069] On the other hand, the embodiments of this application enable the terminal device to receive PDCCHs used for scheduling PDSCHs carrying different SIBs within a cycle by means of the first information mentioned above, which helps to improve the demodulation performance of PDCCHs and thus helps to reduce the access latency of the terminal device.
[0070] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, the first information is further used to indicate that the first SIB and the second SIB are the same.
[0071] The information carried by the first PDSCH is the same as that carried by the second PDSCH, which enables the terminal device to receive the first PDSCH and the second PDSCH in combination, thereby helping to improve the demodulation performance of PDSCH and thus help to reduce access latency.
[0072] By reusing the first information mentioned above, no additional information is needed to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, which helps to save resource overhead.
[0073] In some embodiments, the first SSB and / or the second SSB are used to determine second information, which indicates that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0074] By indicating that the information carried by the first PDSCH is the same as that carried by the second PDSCH, the PDSCH can be configured independently to support merged reception, thereby helping to improve the flexibility of the system.
[0075] In some embodiments, the first information is determined based on a first bit associated with the first SSB and a second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values; wherein the first bit and the second bit being both first values is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0076] Alternatively, the value of the first bit and the value of the second bit are both the first value, which is used to characterize support for the combined reception of the first PDCCH and the second PDCCH.
[0077] Conversely, if the value of the first bit and the value of the second bit are not the first value, but the third value, it is used to indicate that the information carried by the first PDCCH is different from the information carried by the second PDCCH, or to indicate that the combined reception of the first PDCCH and the second PDCCH is not supported.
[0078] For example, the first bit and the second bit can be newly added bits in the SSB, such as the first bit and the second bit can be carried in the extended bits of the MIB.
[0079] In this embodiment, the values of the first and second bits are used to indicate whether the first and second SSBs are the same. This allows for configuration of whether the information carried by the related channels of different SSBs associated with the SIBs is the same, improving system flexibility. For ease of description, the PDCCH used to schedule the PDSCH carrying the SIB, and / or the PDSCH carrying the SIB, are referred to as the related channels of the SIB.
[0080] In addition, multiple SSBs can carry the first bit and the second bit to ensure that all terminal devices within the coverage area can obtain the first information, thus providing support for downlink enhancement of terminal devices within the coverage area.
[0081] In some embodiments, the first information is determined based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; wherein the first identifier being the same as the second identifier is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0082] Conversely, the first identifier and the second identifier are different to indicate that the information carried by the first PDCCH is different from that carried by the second PDCCH, or to indicate that the combined reception of the first PDCCH and the second PDCCH is not supported.
[0083] For example, the first identifier and the second identifier can be represented by a single bit, such as a reserved bit in the MIB or a cell access denied field, which helps to save indication resources.
[0084] For example, the first identifier and the second identifier can be represented by multiple bits. In this case, other values of the aforementioned multiple bits can also be used to configure the information carried by the related channels of SIBs associated with other SSBs besides the first SSB and the second SSB, which is the same, thus providing high flexibility.
[0085] In some embodiments, the first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
[0086] The second identifier is carried in the remaining bits of a plurality of bits, excluding the bits indicating the second SSB index.
[0087] This scheme is applicable to scenarios where terminal devices operate in the FR1 frequency band. Since the index indicating the SSB in the FR1 scenario only requires the lower 3 bits, the middle 3 bits of the index indicating the SSB can also be reused to carry the first and second identifiers, which helps to save indicator resources and reduce overhead.
[0088] In some embodiments, the first SSB and the second SSB belong to the same SSB burst set, and the first information is determined based on the third bit in the first SSB, wherein the value of the third bit is a second value; wherein the value of the third bit as the second value is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0089] Conversely, the third bit value is not the second value, which is used to indicate that the information carried by the related channels of the SIBs associated with the SSBs in the burst set to which the first SSB belongs is different.
[0090] The third bit allows for the configuration of whether the information carried by the relevant channels of multiple SSBs associated with a single SSB burst is identical, thus helping to save configuration resources. For example, the third bit can be a reserved bit in the MIB or a cell access prohibition field, eliminating the need to extend the SSB and thus reducing indication overhead.
[0091] In some embodiments, the first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to a first GSCN group. The fact that the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0092] Alternatively, at least one of the GSCNs corresponding to the center frequency of the first SSB and the GSCNs corresponding to the center frequency of the second SSB does not belong to the first GSCN group, thus the information carried by the first PDCCH is different from the information carried by the second PDCCH.
[0093] By using the GSCN number corresponding to the center frequency of the SSB to indicate whether the information carried by the first PDCCH is the same as that carried by the second PDCCH, the terminal side can enable the information carried by the first PDCCH to be the same as that carried by the second PDCCH without adding additional indication information, thus helping to save indication overhead. In addition, since the GSCN corresponding to the center frequency of the SSB can be obtained during the SSB search process, this scheme can directly reuse the GSCN, making it simple to implement.
[0094] In some embodiments, the information carried by the first PDCCH and the information carried by the second PDCCH are the same, including: the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0095] In other words, the first DCI is the same as the second DCI, wherein the first PDCCH is used to carry the first DCI and the second PDCCH is used to carry the second DCI.
[0096] For example, the first DCI being the same as the second DCI may include a first offset between the start position of the time-domain resource of the first PDSCH and the start position of the time-domain resource of the first PDCCH, which is the same as a second offset between the start position of the time-domain resource of the second PDSCH and the start position of the time-domain resource of the second PDCCH.
[0097] For example, the fact that the first DCI and the second DCI are the same may include that the time domain length of the time domain resources of the first PDSCH is the same as the time domain length of the time domain resources of the second PDSCH.
[0098] For example, the fact that the first DCI and the second DCI are the same may include that the frequency domain resource size of the first PDSCH is the same as that of the second PDSCH.
[0099] It should be understood that the first DCI is the same as the second DCI, and may include one or more of the examples above.
[0100] Furthermore, the modulation and coding scheme of the first PDCCH is the same as that of the second PDCCH, which supports demodulation of the combined signal of the first PDCCH and the second PDCCH. Since the signal energy increases after signal combining, or in other words, the useful information in the signal increases, demodulating the combined signal helps to improve demodulation performance.
[0101] Thirdly, embodiments of this application provide a communication device, which includes: a receiving unit, a first determining unit, and a second determining unit. The receiving unit is configured to receive a first synchronization signal block (SSB) and a second SSB. The first determining unit is configured to determine first information based on the first SSB and / or the second SSB. The first information is configured to indicate that the information carried by the first physical downlink control channel (PDCCH) and the information carried by the second PDCCH are the same. The first PDCCH is configured to schedule a first physical downlink shared channel (PDSCH) carrying a first system message block (SIB), and the second PDCCH is configured to schedule a second PDSCH carrying a second SIB. The first SIB is associated with the first SSB, and the second SIB is associated with the second SSB. The second determining unit is configured to determine downlink control information (DCI) carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0102] The communication device can be the terminal-side device in the above embodiments, such as a terminal or a component in the terminal, such as a module, a communication module, or a circuit or chip responsible for communication functions, or a logic node, logic module, or software that can realize all or part of the functions of the communication device.
[0103] In some embodiments, the second determining unit is specifically configured to: receive the first PDCCH; if the first PDCCH cannot be successfully demodulated, receive the second PDCCH; and determine the DCI carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0104] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, the first information is further used to indicate that the first SIB and the second SIB are the same.
[0105] In some embodiments, the apparatus further includes: a third determining unit, configured to determine second information based on the first SSB and / or the second SSB, the second information being used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; and a fourth determining unit, configured to determine the first SSB based on the first PDSCH and the second PDSCH.
[0106] In some embodiments, the first determining unit is specifically used to: determine the first information based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values; wherein the first bit and the second bit being both first values is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0107] In some embodiments, the first determining unit is specifically configured to: determine the first information based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; wherein the first identifier being the same as the second identifier is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0108] In some embodiments, the first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
[0109] In some embodiments, the first SSB and the second SSB belong to the same SSB burst set, and the first determining unit is specifically used to: determine the first information based on the third bit in the first SSB, wherein the value of the third bit is a second value; wherein the value of the third bit as a second value is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0110] In some embodiments, the first determining unit is specifically configured to: determine the first information based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB, wherein the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to a first GSCN group; wherein, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belonging to the first GSCN group is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0111] In some embodiments, the information carried by the first PDCCH and the information carried by the second PDCCH are the same, including: the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0112] Fourthly, embodiments of this application provide a communication device comprising: a transmitting unit, the transmitting unit being configured to transmit a first synchronization signal block (SSB) and a second SSB; wherein the first SSB and / or the second SSB are configured to determine first information, the first information being configured to indicate that the information carried by a first physical downlink control channel (PDCCH) and the information carried by a second PDCCH are the same, the first PDCCH being configured to schedule a first physical downlink shared channel (PDSCH) carrying a first system message block (SIB), the second PDCCH being configured to schedule a second PDSCH carrying a second SIB, the first SIB being associated with the first SSB, and the second SIB being associated with the second SSB.
[0113] The communication device can be the network-side device mentioned above, such as a network device or a component in a network device, such as a module, a communication module, or a circuit or chip in a network device that is responsible for communication functions, or a logic node, logic module, or software that can realize all or part of the functions of the communication device.
[0114] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, the first information is further used to indicate that the first SIB and the second SIB are the same.
[0115] In some embodiments, the first SSB and / or the second SSB are used to determine second information, which indicates that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0116] In some embodiments, the first information is determined based on a first bit associated with the first SSB and a second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values; wherein the first bit and the second bit being both first values is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0117] In some embodiments, the first information is determined based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; wherein the first identifier being the same as the second identifier is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0118] In some embodiments, the first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
[0119] In some embodiments, the first SSB and the second SSB belong to the same SSB burst set, and the first information is determined based on the third bit in the first SSB, wherein the value of the third bit is a second value; wherein the value of the third bit as the second value is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0120] In some embodiments, the first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to a first GSCN group. The fact that the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0121] In some embodiments, the information carried by the first PDCCH and the information carried by the second PDCCH are the same, including: the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0122] Fifthly, embodiments of this application provide a communication device, which includes a memory and one or more processors. The memory is used to store part or all of the computer program or instructions necessary for implementing the functions involved in the first aspect above. The one or more processors can execute the computer program or instructions, and when the computer program or instructions are executed, cause the communication device to implement the methods in any possible design or implementation of the first aspect above.
[0123] In one possible design, the communication device may further include an interface circuit, wherein the processor is used to communicate with other devices or components through the interface circuit.
[0124] In one possible design, the communication device may also include the memory.
[0125] The aforementioned communication device may be a terminal, or a component in the terminal, such as a module, a communication module, or a chip in the terminal responsible for communication functions (such as a modem chip (also known as a baseband chip) or a SoC chip or SIP chip containing a modem chip module), or a logic node, logic module, or software that can realize all or part of the functions of the communication device.
[0126] Sixthly, embodiments of this application provide a communication device, the communication device including a memory and one or more processors. The memory is used to store part or all of the computer program or instructions necessary to implement the functions involved in the second aspect above. The one or more processors can execute the computer program or instructions, and when the computer program or instructions are executed, cause the communication device to implement the methods in any possible design or implementation of the second aspect above.
[0127] In one possible design, the communication device may further include an interface circuit, wherein the processor is used to communicate with other devices or components through the interface circuit.
[0128] In one possible design, the communication device may also include the memory.
[0129] The aforementioned communication device may be a network device, or a component in a network device, such as a module, a communication module, or a chip in a network device that is responsible for communication functions (such as a modem chip (also known as a baseband chip) or a SoC chip or SIP chip containing a modem chip module). It may also be a logic node, logic module, or software that can realize all or part of the functions of the communication device.
[0130] In a seventh aspect, embodiments of this application provide a computer program product comprising a computer program that, when executed by a processor, performs the method described in the first aspect above, or performs the method described in the second aspect above.
[0131] Eighthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed, performs the method of the first aspect above, or performs the method of the second aspect above.
[0132] Ninthly, embodiments of this application provide a chip, the chip including: a processor, configured to call and run a computer program from a memory, causing a communication device on which the chip is installed to perform the method of the first aspect above, or to perform the method of the second aspect above.
[0133] In a tenth aspect, embodiments of this application provide a communication system, which includes the communication devices described in the third or fourth aspect above, and / or the communication devices described in the fifth or sixth aspect above. Attached Figure Description
[0134] Figure 1 is a schematic diagram of the architecture of the communication system used in the embodiments of this application;
[0135] Figure 2A is a schematic diagram of the NTN architecture including transparent transmission mode satellites;
[0136] Figure 2B is a schematic diagram of an NTN architecture that includes regenerable mode satellites;
[0137] Figure 2C is a schematic diagram of another NTN architecture that includes regenerable mode satellites;
[0138] Figure 3 is a schematic diagram of satellite coverage;
[0139] Figure 4 is a schematic diagram of the distribution of synchronization grids and channel grids;
[0140] Figure 5 shows an example of satellite downlink coverage performance;
[0141] Figure 6 is a flowchart illustrating a communication method provided in an embodiment of this application;
[0142] Figure 7 is a flowchart illustrating another communication method provided in an embodiment of this application;
[0143] Figure 8 is an exemplary block diagram of a communication device provided in an embodiment of this application;
[0144] Figure 9 is another exemplary block diagram of the communication device provided in an embodiment of this application;
[0145] Figure 10 is another exemplary block diagram of the communication device provided in the embodiments of this application. Detailed Implementation
[0146] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0147] In the description of the embodiments of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship. For example, A / B can represent A or B. "And / or" in the embodiments of this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Furthermore, in the description of the embodiments of this application, unless otherwise stated, "multiple" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. Additionally, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or the order of execution, and that the words "first" and "second" do not necessarily imply that they are different.
[0148] In the various method embodiments of this application, the order of the sequence numbers does not imply the order of execution. The execution order should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0149] It is understood that in the embodiments of this application, descriptions such as "under the circumstances," "if," "when," and "if..." can be used interchangeably. Furthermore, these descriptions all refer to the corresponding processing that will be carried out under certain objective circumstances, and are not limited to a specific time, nor do they require any judgment action during implementation, nor do they imply any other limitations.
[0150] It is understood that some optional features in the embodiments of this application can be implemented independently in certain scenarios without relying on other features, such as the current solution on which they are based, to solve the corresponding technical problems and achieve the corresponding effects. Alternatively, they can be combined with other features as needed in certain scenarios. Correspondingly, the apparatus given in the embodiments of this application can also implement these features or functions, which will not be elaborated here.
[0151] In this application embodiment, "sending information to...(terminal)" can be understood as the destination of the information being the terminal, and may include sending information to the terminal directly or indirectly. "Receiving information from...(terminal)" can be understood as the source of the information being the terminal, and may include receiving information from the terminal directly or indirectly. Information may undergo necessary processing between the source and destination, such as format changes, but the destination can understand the valid information from the source. Similar expressions in this application can be understood in a similar way, and will not be elaborated further here.
[0152] In the embodiments of this application, unless otherwise specified, the same or similar parts between the various embodiments can be referred to each other. In the various embodiments of this application, and in the various implementation methods / methods / implementations within each embodiment, unless otherwise specified or logically conflicting, the terminology and / or descriptions between different embodiments and between the various implementation methods / methods / implementations within each embodiment are consistent and can be mutually referenced. The technical features in different embodiments and the various implementation methods / methods / implementations within each embodiment can be combined according to their inherent logical relationships to form new embodiments, implementation methods, methods, or implementation approaches. The embodiments of this application described below do not constitute a limitation on the scope of protection of this application.
[0153] This application can be applied to various communication systems. For ease of understanding, the following description uses the communication system 10 shown in Figure 1 as an example to illustrate the communication system to which the embodiments of this application are applicable.
[0154] Figure 1 is a schematic diagram of the architecture of the communication system 10 used in the embodiments of this application. As shown in Figure 1, the communication system includes a radio access network (RAN) 100, wherein the RAN 100 includes at least one RAN node (110a and 110b in Figure 1, collectively referred to as 110), and may also include at least one terminal (120a-120j in Figure 1, collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in Figure 1). The terminal 120 is wirelessly connected to the RAN node 110. Terminals and RAN nodes can be interconnected via wired or wireless means. The communication system 10 may also include a core network 200. The RAN node 110 is connected to the core network 200 wirelessly or via wired means. The core network equipment in the core network 200 and the RAN node 110 in the RAN 100 may be independent and different physical devices, or they may be the same physical device that integrates the logical functions of the core network equipment and the logical functions of the RAN node. Communication system 10 may also include Internet 300.
[0155] RAN 100 can be an evolved universal terrestrial radio access (E-UTRA) system, a new radio (NR) system, or a future radio access system as defined in the 3rd generation partnership project (3GPP). RAN 100 can also be an open RAN (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. RAN 100 can also be a communication system that integrates two or more of the above systems. RAN 100 can also be applied to non-terrestrial network (NTN) communication systems, or scenarios where NTN and terrestrial network (TN) are integrated. The NTN system can be an NTN system integrated with 4G, 5G, and any future generation of communication systems, such as NR NTN, IoT NTN, etc. NTN communication systems can be, for example, satellite communication systems, or include unmanned aerial vehicles, high altitude platform stations (HAPS), and other aerial access network equipment; this application does not limit the scope of such systems.
[0156] RAN node 110 (also known as access network equipment, RAN entity, or access node, etc.) is used to help terminals access the communication system wirelessly. In one 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 (as shown in Figure 1, 110a), a micro base station or indoor station (as shown in Figure 1, 110b), a relay node or donor node, or a radio controller in a CRAN scenario. Optionally, the RAN node can also be a satellite (or satellite base station) or a high altitude platform station (HAPS), or a base station device mounted on a satellite / HAPS. The satellite can include at least one of the following: a geostationary earth orbit (GEO) satellite (or geosynchronous orbit satellite) or a non-geostationary earth orbit (NGEO) satellite. Non-geostationary orbit satellites may include at least one of the following: medium Earth orbit (MEO) satellites or low Earth orbit (LEO) satellites. There are no limitations here. Network equipment may also be gateway stations (or ground stations, earth stations, signaling stations, gateways, or gateway stations), etc. RAN nodes may also be servers, wearable devices, vehicles, or in-vehicle equipment, etc. For example, the access network equipment in vehicle-to-everything (V2X) technology can be a roadside unit (RSU).
[0157] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, with different RAN nodes each implementing some of the base station's functions. For example, RAN nodes can be central units (CUs), distributed units (DUs), or radio units (RUs). Here, the CU can perform the functions of the base station's radio resource control protocol and PDCP, as well as the service data adaptation protocol (SDAP). The DU can perform the functions of the base station's radio link control layer and medium access control (MAC) layer, and can also perform some or all of the physical layer functions. For specific descriptions of these protocol layers, refer to the relevant 3GPP technical specifications. The RU can be used to implement radio frequency signal transmission and reception. The CU and DU can be two independent RAN nodes, or they can be integrated into the same RAN node, such as within a baseband unit (BBU). RUs can be included in radio frequency equipment or radio frequency units, such as remote radio units (RRUs), active antenna units (AAUs), or remote radio heads (RRHs). CUs can be further divided into two types of RAN nodes: CU-control plane (CP) and CU-user plane (UP).
[0158] In different systems, RAN nodes may have different names. For example, in an O-RAN system, a CU can be called an open CU (O-CU), a DU can be called an open DU (O-DU), and an RU can be called an open RU (O-RU). Similarly, a CU-CP can be called an O-CU-CP, a CU-UP can be called an O-CU-UP, and an RU can be called an O-RU. For ease of description, this application uses CU, CU-CP, CU-UP, DU, and RU as examples in its embodiments.
[0159] All or part of the functions of the RAN node in this application can also be implemented through software functions running on hardware, or through virtualization functions instantiated on a platform (e.g., a cloud platform). The RAN node may also be equipped with communication modules, circuits, or chips that perform corresponding communication functions. The RAN node may also be configured with program instructions for performing corresponding communication functions and corresponding program instructions. The RAN node in this application can also be a logical node, logical module, or software capable of implementing all or part of the RAN node functions. The embodiments of this application do not limit the specific technology or specific device form used in the RAN node.
[0160] Terminal 120 is a device with wireless transceiver capabilities, capable of sending signals to or receiving signals from a base station. The terminal can also be referred to as user equipment (UE), terminal equipment, access terminal, user unit, user station, mobile station (MS), remote station, remote terminal, mobile terminal (MT), user terminal, wireless communication equipment, user agent, user device, and terminal device, etc. Terminal 120 can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, wearable device, vehicle, drone, helicopter, airplane, ship, robot, robotic arm, smart home device, etc. The embodiments of this application do not limit the device form of the terminal.
[0161] For example, terminal 120 can be an Internet of Things (IoT) device (e.g., a sensor, electricity meter, water meter, etc.), a V2X device, a station (ST) in a wireless local area network (WLAN), a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device (also known as a wearable smart device), a tablet computer or a computer with wireless transceiver capabilities, a virtual reality (VR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, or a wireless terminal in a smart home. Wireless terminals (such as those in the home), vehicle-mounted terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, intelligent connected vehicles, and drones with drone-to-drone (U2U) communication capabilities are all examples. Terminals can also be communication modules with satellite communication capabilities, satellite phones or their components, or satellite communication terminals, such as very small aperture terminals (VSAT terminals), portable stations, fixed stations, and vehicle-mounted or airborne satellite communication terminals. It should be understood that satellite communication terminals can serve as micro base stations to further provide data interfaces to accessed user equipment.
[0162] The roles of base stations and terminals can be relative. For example, network element 120i in Figure 1 can be a helicopter or a drone, which can be configured as a mobile base station. For terminals 120j that access the wireless access network 100 through 120i, terminal 120i is a base station; however, for base station 110a, 120i is a terminal, meaning that 110a and 120i communicate via a wireless air interface protocol. Of course, 110a and 120i can also communicate via a base station-to-base station interface protocol. In this case, relative to 110a, 120i is also a base station. Therefore, both base stations and terminals can be collectively referred to as communication devices. 110a and 110b in Figure 1 can be called communication devices with base station functions, and 120a-120j in Figure 1 can be called communication devices with terminal functions.
[0163] Base stations and terminals can be fixed or mobile. They can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can be deployed on aircraft, balloons, and satellites. The embodiments of this application do not limit the application scenarios of the base stations and terminals.
[0164] For example, the core network 200 may include user plane function (UPF) network elements, access and mobility management function (AMF) network elements, session management function (SMF) network elements, policy control function (PCF) network elements, network exposure function (NEF) network elements, charging function (CHF) network elements, location management function (LMF) network elements, application function (AF) network elements, etc.
[0165] The following describes another communication system (NTN) to which the embodiments of this application are applicable.
[0166] NTN refers to a network that provides communication services using radio frequency resources on platforms such as satellites (including geostationary earth orbit (GEO), medium earth orbit (MEO), and low earth orbit (LEO), unmanned aerial vehicles (UAVs), or high-altitude communication platforms. Compared to terrestrial cellular networks (such as 5G), NTN networks offer wider coverage, higher path loss, greater latency, faster speeds, and lower costs. As a supplement and extension to terrestrial networks, NTN can achieve wide-area seamless coverage that wired telephone networks and terrestrial mobile communication networks cannot, effectively solving internet access problems in areas with scarce communication infrastructure. For example, by deploying a large number of satellites in low Earth orbit, seamless ground coverage can be achieved through reasonable constellation construction, and the round-trip latency of data between satellites and ground terminals is greatly reduced. Even compared to geostationary orbit satellites, deploying satellites in low Earth orbit results in lower data round-trip latency, reaching the tens of milliseconds level.
[0167] With the use of technologies such as high-frequency bands, multi-beamforming, and frequency reuse, satellite communication capabilities have been significantly improved while reducing unit broadband costs, thus meeting the demands of high-data-rate services. Compared to terrestrial 5G networks and submarine fiber optic cables, NTN also has a significant cost advantage. Modern small satellites have low R&D and manufacturing costs, and software-defined technologies can further extend the lifespan of satellites in orbit. In addition to global coverage (such as in remote areas and on ocean-going vessels), NTN can also be used in emergency relief (such as disaster monitoring and emergency communications), the Internet of Things, and high-speed mobility (such as high-speed rail and airplanes), thus attracting widespread attention from industry and academia.
[0168] Because satellites are less susceptible to natural disasters or external damage, research is currently underway to use them as access network equipment (such as base stations) in mobile communication systems to provide communication services to areas such as oceans and forests. Unlike terrestrial base stations, satellites move at higher speeds relative to the ground and travel much farther, resulting in greater signal path loss when used as base stations. Current communication mechanisms designed for communication between terminal devices and terrestrial base stations cannot be directly applied to communication between terminal devices and satellite base stations.
[0169] Based on their operating modes, satellites can generally be divided into two main categories: transparent mode and regenerative mode. These two modes will be described in detail below.
[0170] Figure 2A is a schematic diagram of an NTN architecture including a satellite in pass-through mode. In pass-through mode, the satellite only acts as a frequency conversion relay, essentially functioning as an analog radio frequency repeater. Specifically, the satellite can replicate the NR Uu radio interface signal from the feed link (between the NTN gateway and the satellite) to the service link (between the satellite and the terminal equipment), and vice versa. The satellite radio interface on the feed link transmits the NR-Uu interface signal; that is, the satellite does not terminate the NR Uu interface signal but replicates it. The NTN gateway supports all the necessary functions for forwarding the NR-Uu interface signal. Different transmission satellites can connect to the same ground base station, such as a gNB. Optionally, the gateway can also be integrated with the base station.
[0171] Figure 2B is a schematic diagram of an NTN architecture including a satellite in regeneration mode. In regeneration mode, the satellite has some or all of the functions of a base station, such as including gNB equipment or DU on the satellite. In this architecture, the satellite acts as a base station to regenerate signals received from the ground, that is, transmitting NR-Uu radio interface signals on the service link between the terminal equipment and the satellite, and transmitting satellite radio interface signals on the feeder link between the NTN gateway and the satellite. The NG interface between the satellite and the gateway is carried on the satellite radio interface (SRI). The NG interface signal is transmitted to the NTN gateway through the SRI interface, and then forwarded by the NTN gateway to the core network equipment on the ground.
[0172] Figure 2B shows the NTN architecture with all base station functions. If the satellite only has DU functions, then the NTN architecture also includes a ground CU unit, as shown in Figure 2C.
[0173] Compared to terrestrial communication systems, a single satellite has a wider coverage area and a longer transmission distance. Providing services to terminal devices through wide coverage is a significant feature of satellite communication systems.
[0174] Figure 3 is a schematic diagram of satellite coverage. Satellites provide services to terminal devices within their coverage area via SSB 0 to SSB N-1. Each SSB has a corresponding synchronization raster (or sync raster for short). After receiving an SSB, the terminal device can determine the GSCN number corresponding to the synchronization raster where the SSB is located. The center frequency of the SSB can be determined based on the GSCH number. A brief introduction to the GSCN number and synchronization raster is provided below.
[0175] Figure 4 shows a schematic diagram of the distribution of synchronization grids and channel grids. Referring to Figure 4, the channel grid can be used to place data, reference signals, control channels, etc. Because the cell bandwidth in NR is very wide, blind cell detection according to the channel grid would result in very slow UE access speed. To enable terminals to search for cells more quickly (detect SS / PBCH), the NR system specifies the center frequency and spacing of the SSB, called the synchronization grid, which are 1200 kHz, 1.44 MHz, and 17.28 MHz, respectively.
[0176] Terminal devices scan cells according to a synchronous grid. SS REF The SSB represents the center frequency, and GSCN is the corresponding number for that frequency point. The relationship between the two is shown in Table 1.
[0177] Table 1
[0178] SSBs are placed according to a synchronization grid, with one GSCN frequency point number corresponding to one synchronization grid. The protocol also specifies the SCS and SSB patterns for the corresponding SSBs in different frequency bands, as well as the GSCN range and spacing of the synchronization grids.
[0179] The protocol divides different frequency ranges into different operating frequency bands, each with different radio frequency performance requirements. Within each operating frequency band, different subcarrier spacings, duplex modes, application scenarios, and so on are defined. Tables 2 and 3 show the relevant performance requirements for different operating frequency bands in FR1 and FR2, respectively.
[0180] Table 2
[0181] Table 3
[0182] For NTN satellite communication scenarios, the protocol defines that NTN satellites are designed to operate in the frequency bands shown in Table 4 of FR1.
[0183] Table 4
[0184] Different channel bandwidths and synchronization grids are defined within different operating frequency bands.
[0185] During the initial access process, the UE first performs cell synchronization by searching for SSBs. When searching for an SSB, the UE first determines the SSB pattern case and the GSCN range and spacing of the candidate synchronization grids based on the operating frequency band and subcarrier spacing (SCS). Table 5 shows the GSCN range and spacing of the synchronization grids for different frequency bands.
[0186] Table 5
[0187] Here, <step> represents the GSCN interval / distance between available GSCNs.
[0188] The above section introduced the synchronization grids for different operating frequency bands of FR1. The following section, in conjunction with Table 6, introduces the synchronization grids for different operating frequency bands of FR2.
[0189] Table 6
[0190] Table 7
[0191] As described above, when performing an SSB search, the terminal device first determines the SSB pattern scheme and the range and spacing of the GSCNs of candidate synchronization grids based on the terminal device's operating frequency band and SCS. Then, it performs a traversal search based on the determined GSCN range to obtain the SSBs. For example, the center frequency of the SSB can be determined based on the GSCN, and then the SSB is searched in the vicinity of that center frequency. If SSB#0 is found, then the GSCN is the GSCN number corresponding to the synchronization grid where SSB#0 is located.
[0192] Through the initial access procedure, the terminal device can establish a basic signaling connection with the network device. The initial access procedure is described below as an example.
[0193] Network devices can broadcast different SSBs for different communication areas. These SSBs can be distinguished by their indices. In other words, different SSB indices represent downlink synchronization signals with different beam directions, and different downlink synchronization signals can cover and serve different areas.
[0194] After receiving the SSB, the terminal device can perform timed synchronization based on the SSB. Additionally, the terminal device can receive SIB1 based on the relevant parameters in the SSB to obtain cell information.
[0195] SIB1 can be carried in the PDSCH, and the PDSCH carrying SIB1 can be scheduled by the PDCCH. The DCI carried in the PDCCH can be used to indicate information such as the time-domain resources, frequency-domain resources, and modulation and coding scheme of the PDSCH carrying SIB1. During the initial access process, the terminal device can determine the search space of the PDCCH based on the relevant parameters in the SSB and detect the PDCCH in the search space. After receiving the PDCCH, it can determine the resource location and other information of the PDSCH carrying SIB1 based on the DCI in the PDCCH and receive the PDSCH carrying SIB1 at the corresponding resource location. Based on the parsing result of SIB1, cell information can be obtained.
[0196] In NTN scenarios, the initial access process typically requires obtaining satellite ephemeris information. This satellite ephemeris information can be carried in system messages, such as SIB19. For ease of description, the following explanation uses the example of satellite ephemeris information carried in SIB19; however, it should be understood that this application is not limited to this approach.
[0197] As one possible implementation, the search space for SIB19 can be determined based on SIB1. Specifically, SIB1 can indicate the search space for the PDCCH carrying the PDSCH of SIB19. Based on this PDCCH, the time-frequency location of the PDSCH carrying SIB19 can be determined, and the PDSCH carrying SIB19 can be received at the corresponding resource location. Ephemeris information can be obtained from the resolution result of SIB19.
[0198] As another possible implementation, the search space of SIB19 can be decoupled from that of SIB1, meaning the search space of SIB19 does not depend on the resolution results of SIB1. For example, the search space of SIB19 can be defined as the Type 0C common search space (CSS), the location of which can be determined based on the SSB. For instance, the SSB can instruct the search space of the PDCCH carrying the PDSCH of SIB19. Based on this PDCCH, the time-frequency location of the PDSCH carrying SIB19 can be determined, and the PDSCH carrying SIB19 can be received at the corresponding resource location. Ephemeris information can be obtained based on the resolution results of SIB19.
[0199] It should be noted that ground communication systems do not need to obtain ephemeris information.
[0200] After obtaining cell information and / or ephemeris information, the terminal device can send a random access preamble using the corresponding uplink resources. For the network device, the received random access preamble and the uplink resources can be used to determine the area where the terminal device is located and establish a connection with the terminal device.
[0201] The following sections provide exemplary descriptions of how the search space for SIB1 and the search space for SIB19 are determined.
[0202] As mentioned earlier, during the initial access process, the network side sends multiple SSBs and their corresponding SIB1s. SIB1 is cell-level system information, and as one possible implementation, the content carried by the SIB1 associated with different SSB indices is consistent.
[0203] Referring to Figure 3, under satellite coverage, the terminal device can receive three SSB beams: SSB 0, SSB 1, and SSB 2. The terminal device can select one of these three SSBs, such as selecting SSB 1 with the best energy based on energy detection results, and detect SIB1 associated with SSB 1.
[0204] The detection slot for SIB1 can be determined based on the SSB index. Taking SSB and CORESET#0 multiplexing Pattern1 as an example, the UE can detect two consecutive slots starting from n0, where the mapping relationship between n0 and SSB index i satisfies the following formula:
[0205] Among them, O×2 u This can be understood as O ms (absolute time), representing the search space of CORESET#0 when i = 0 (corresponding to SSB0), which is offset by O ms relative to the start time of even-numbered frames. For FR1 and FR2, the values of O in related techniques are {0, 2, 5, 7} and {0, 2.5, 5, 7.5}, respectively. M can be understood as the interval between the search spaces of CORESET#0 corresponding to the two consecutive SSBs, in units of slots. This represents the number of slots within a system frame.
[0206] The aforementioned O, M, etc., can be determined based on the parameters in the MIB. The lower 3 bits of the SSB index i can be obtained from the demodulation reference signal (DMRS) pilot (i) of the physical broadcast channel (PBCH). SSB The 3 bits are obtained from the signal and can be obtained from the PBCH Payload information. Table 8 shows the parameters and their meanings in the MIB and PBCH Payload.
[0207] Table 8
[0208] The definition of MIB information elements in the protocol is as follows.
[0209] It should be noted that the value "barred" in the cellBarred field indicates that access to the cell is prohibited, as defined in TS 38.304
[0020] . Integrated access and backhaul-mobile terminals (IAB-MT) ignore this field. Additionally, this field is also ignored when connecting to an NTN.
[0210] The previous section mentioned a method to decouple the search space of SIB19 from the parsing results of SIB1. In this method, the search space of SIB19 can be determined based on the SSB. The location of SIB19 is detected by the system frame SFN. SIB The intermediate time slot n1 satisfies the following formula.
[0211] or
[0212] in, M SIB =2.
[0213] Specifically, in the above formula, i is the index of SSB, and L max This represents the maximum number of candidate SSBs within a half-frame. 0 indicates the offset of CORESET#0 (SSB index 0) relative to the start position of the system frame containing SSB0, in milliseconds (ms). Since 1ms contains 2... u Time slot, O×2 u This indicates the number of time slots contained in O ms. M represents the interval of the search space for CORESET#0 corresponding to two adjacent SSBs, in time slots. SIB This represents the offset of the CORESET of SIB19 corresponding to SSB index 0 relative to the start position of the system frame containing SSB0, in milliseconds (ms). Since 1 ms contains 2... u Time slot, O SIB ×2 u O SIB The number of time slots contained in ms. M SIB This represents the interval of the search space of the CORESET of the SIBs corresponding to two adjacent SSBs, in time slots. This refers to the number of time slots within a system frame. For SCS = 30kHz, SFN SIB_i It is the system frame number (SFN) of SIB19. SSB_i It is the system frame number where SSB#i is located.
[0214] After parsing the SSB, the terminal device can determine the values of the parameters such as M and O based on the parameters carried in the SSB and the pre-configuration table, and then determine the search space of SIB19.
[0215] Figure 5 shows an example of satellite downlink coverage performance. Referring to Figure 5, the satellite's total downlink power is 200W, coverage radius is 850km, antenna gain is 30dBi, orbital altitude is 600km, wavelet radius is 25km, and the total number of wavelets per satellite is 1058. In satellite communication systems, the limited total satellite power restricts the link budget for a single beam. Taking the scenario shown in Figure 5 as an example, the performance difference between the downlink beam and the edge beam can reach 5dB Gap, with poor edge performance. Therefore, demodulation of common channels is difficult in cell edge areas, affecting the initial access process. The common channels mentioned here can refer to channels carrying common cell information, such as channels carrying SSB, SIB1, SIB19, and Type 0 PDCCH, Type 0A PDCCH, etc.
[0216] As one possible implementation, if demodulation fails on the common channel, the terminal device can receive the next cycle's common channel and continue demodulation. Taking the reception process of SIB1 as an example, the terminal device can receive SIB1 associated with SSB#0. If SIB1 fails to demodulate, the terminal device can receive the next cycle's SIB1 and continue demodulation until successful. Since SIB1 is transmitted periodically, this method helps the terminal device access the network. However, in cases of poor demodulation performance, successful reception of SIB1 may require multiple cycles, resulting in a significant access delay for the terminal device.
[0217] Due to the high-speed movement of satellites, the coverage and service time of a single satellite and each beam under a single satellite are limited. Larger access latency for terminal devices can reduce their access opportunities; therefore, access latency is crucial for NTN satellite communication systems.
[0218] To address the aforementioned issues, embodiments of this application provide a communication method that enables the information carried by a common channel to be identical, thereby supporting the combined reception of the same common channel and improving the demodulation performance of the common channel. Taking the PDCCH used for scheduling SIBs as an example, embodiments of this application enable the information carried by the first PDCCH to be identical to the information carried by the second PDCCH, supporting the combined reception of the first and second PDCCHs, thus improving the reception performance of both the first and second PDCCHs.
[0219] In this system, the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB. The first PDCCH is used to schedule the first PDSCH carrying the first SIB, and the second PDCCH is used to schedule the second PDSCH carrying the second SIB. The information carried in the first PDCCH is the first DCI, and the information carried in the second PDCCH is the second DCI. In other words, the first DCI is used to schedule the first PDSCH, and the second DCI is used to schedule the second PDSCH.
[0220] For example, the information carried by the first PDCCH is the same as the information carried by the second PDCCH, which can be replaced by: the first DCI is the same as the second DCI.
[0221] As described above, the first DCI indicates information such as the time-frequency position of the first PDSCH, and the second DCI indicates information such as the time-frequency position of the second PDSCH. For example, the first DCI can indicate the offset between the start position of the time-domain resources of the first PDSCH and the start position of the time-domain resources of the first PDCCH, and the size of the time-domain resources of the first PDSCH. The size of the frequency-domain resources of the first PDSCH can be the same as the size of the frequency-domain resources of the first PDCCH by default, or the size of the frequency-domain resources of the first PDSCH can be indicated by the first DCI.
[0222] Based on this, the first DCI being the same as the second DCI may include a first offset between the start position of the time-domain resource of the first PDSCH and the start position of the time-domain resource of the first PDCCH, which is the same as a second offset between the start position of the time-domain resource of the second PDSCH and the start position of the time-domain resource of the second PDCCH.
[0223] Alternatively, having the first DCI and the second DCI be the same may include having the time domain length of the time domain resources of the first PDSCH being the same as the time domain length of the time domain resources of the second PDSCH.
[0224] Alternatively, having the first DCI and the second DCI be the same may include having the same frequency domain resource size for the first PDSCH and the same frequency domain resource size for the second PDSCH.
[0225] It should be understood that the first DCI is the same as the second DCI, and may include one or more of the examples above.
[0226] It should be noted that since the reference position of the first offset (the starting position of the time domain resources of the first PDCCH) is different from the reference position of the second offset (the starting position of the time domain resources of the second PDCCH), the time domain resource positions of the first PDSCH and the second PDSCH are different when the first DCI and the second DCI are the same.
[0227] In the embodiments of this application, by enabling the information carried by the first PDCCH to be the same as that carried by the second PDCCH, or in other words, enabling the first DCI to be the same as the second DCI, the combined reception of the first PDCCH and the second PDCCH can be supported, which helps to improve the demodulation performance of the PDCCH and thus helps to reduce access latency.
[0228] As one possible implementation, the configuration for whether common channels within a cell support merged reception can be standardized. For example, it can be configured that all common channels within the cell support merged reception, or none support merged reception.
[0229] For example, multiple SSBs within a cell may be associated with multiple SIBs. The information carried by the PDSCH of these multiple SIBs may be configured to be the same (i.e., all support merged reception), and / or the information carried by the PDCCH of these multiple SIBs may be the same (i.e., all support merged reception).
[0230] Alternatively, the information of the PDSCH bearers carrying the multiple SIBs can be configured to be different (i.e., none of them support merged reception), and / or the information of the PDCCH bearers used for scheduling the multiple SIBs can be different (i.e., none of them support merged reception).
[0231] In other words, it is possible to configure all related channels of SIBs associated with SSBs within a period to support combined reception, or none of them to support combined reception. This scheme is simple to implement. For ease of description, the PDCCH used to schedule the PDSCH carrying the SIB, and / or the PDSCH carrying the SIB, are referred to as the related channels of the SIB.
[0232] As another possible implementation, the common channel can be configured to support combined reception based on downlink coverage performance, offering greater flexibility. For example, areas with good downlink coverage do not need to be configured to support combined reception on the common channel, which helps save resources and reduce processing complexity; while areas with poor downlink coverage can be configured to support combined reception on the common channel, thereby helping to improve the demodulation performance of the common channel.
[0233] For example, considering the poor downlink coverage performance of beams covering cell edges, the relevant channels of SIBs associated with SSBs carried by beams covering cell edges can be configured to support combined reception to improve downlink coverage performance at cell edges. Conversely, the downlink coverage performance of beams covering sub-satellite areas is generally better; therefore, the relevant channels of SIBs associated with SSBs carried by beams covering sub-satellite areas can be configured to not support combined reception.
[0234] In addition, terminal devices located at the edge of the cell are more likely to receive multiple beams, which helps to achieve combined reception of multiple common channels.
[0235] In some embodiments, beams covering the sub-satellite region and beams covering the cell edge can be distinguished based on the relationship between the ground position pointed to by the beam center point and the satellite position. For example, if the angle between the line connecting the ground position and the satellite position pointed to by the beam center point and the vertical direction is small, then the beam covers the sub-satellite region; if the angle between the line connecting the ground position and the satellite position pointed to by the beam center point and the vertical direction is large, then the beam covers the cell edge. This method for determining beams covering the sub-satellite region and beams covering the cell edge is merely illustrative and should be understood as not limiting the scope of this application.
[0236] The aforementioned combined reception, also known as joint reception, combined demodulation, or joint demodulation, can be understood as determining the DCI carried in the first PDCCH based on the first PDCCH and the second PDCCH. Several combined reception methods are described below as examples. It should be understood that this application does not limit the scope of the application.
[0237] As one possible implementation, the signals of the first PDCCH and the second PDCCH can be merged first, and then the merged result can be demodulated to obtain the DCI carried in the first PDCCH. This application does not limit the signal merging method; for example, it can be signal superposition or weighted superposition. Since the signal energy increases after signal merging, or in other words, the useful information in the signal increases, demodulating the merged result helps improve demodulation performance.
[0238] As another possible implementation, the first PDCCH and the second PDCCH can be demodulated separately first, and then the demodulation results of the first PDCCH and the second PDCCH can be combined to obtain the DCI carried in the first PDCCH. Due to factors such as the difference in signal-to-noise ratio during the transmission of the first PDCCH and the second PDCCH, the parts of the first PDCCH that cannot be successfully demodulated may be different from those of the second PDCCH. Therefore, by combining the demodulation results of the first PDCCH and the second PDCCH, it is helpful to obtain the DCI carried in the first PDCCH, thereby helping to improve demodulation performance.
[0239] Generally, all SSBs within a cell need to be traversed within one cycle. By merging the reception of the first PDCCH and the second PDCCH, it is easier to successfully demodulate the first PDCCH within one cycle, thereby improving the demodulation performance of the first PDCCH. Compared with related technologies, the scheme in this application embodiment does not require waiting for multiple cycles during the reception of the first PDCCH, thus helping to reduce access latency.
[0240] The above method provides the conditions for the combined reception of the first PDCCH and the second PDCCH. However, the terminal device cannot know whether the first PDCCH and the second PDCCH can be received in a combined manner.
[0241] Therefore, embodiments of this application provide another communication method to solve this problem.
[0242] In the embodiments of this application, the first information indicating that the information carried by the first PDCCH is the same as the information carried by the second PDCCH can be determined by the first SSB and / or the second SSB, enabling the terminal device to merge the PDCCH used to schedule PDSCHs carrying different SIBs within a period, thereby helping to reduce the access latency of the terminal device.
[0243] Figure 6 is a flowchart illustrating a communication method provided in an embodiment of this application. The method shown in Figure 6 may involve the interaction between a terminal device and a network device.
[0244] For example, the method shown in Figure 6 can be applied to the terminal side, such as the terminal or components in the terminal, such as modules, communication modules, or circuits or chips in the terminal that are responsible for communication functions (such as modem chips, also known as baseband chips, or SoC chips or SIP chips containing modem cores), or logic nodes, logic modules or software that can realize all or part of the functions of communication devices.
[0245] For example, the method shown in Figure 6 can be applied to the network side, such as network devices or components in network devices, such as modules, communication modules, or circuits or chips in network devices that are responsible for communication functions (such as modem chips, also known as baseband chips, or SoC chips or SIP chips containing modem cores), or logic nodes, logic modules or software that can realize all or part of the functions of communication devices.
[0246] The method provided in the embodiments of this application will now be described from the perspective of the interaction between terminal devices and network devices.
[0247] In some embodiments, the method shown in FIG6 can be applied to terrestrial communication scenarios. In other embodiments, the method shown in FIG6 can be applied to NTN scenarios. For example, the network device can be a satellite (or satellite base station) or HAPS, or a base station device mounted on a satellite / HAPS, or some functions of the network device can be deployed on a satellite / HAPS.
[0248] The method shown in Figure 6 may include steps S610 to S630.
[0249] S610: The terminal device receives the first SSB and the second SSB, and correspondingly, the network device sends the first SSB and the second SSB.
[0250] In some embodiments, the terminal device can determine the range and spacing of the GSCN according to the operating frequency band, thereby determining the center frequency points of multiple SSBs based on the GSCN. The terminal device searches for an SSB by traversing the center frequency points of multiple SSBs.
[0251] The terminal device can determine a candidate set of SSBs based on the received signal, such as by determining the candidate SSB set based on the signal energy detection result. That is, the SSBs in the candidate SSB set can be considered as SSBs that the terminal device can receive. The first SSB and the second SSB can be SSBs in the candidate SSB set. Taking the terminal device being able to search for SSB#0, SSB#1, and SSB#2, i.e., the candidate SSB set includes SSB#0, SSB#1, and SSB#2, as an example, the first SSB can be SSB#0, and the second SSB can be either SSB#1 or SSB#2. In some embodiments, the first SSB can be the SSB with the best signal quality among SSB#0, SSB#1, and SSB#2.
[0252] S620, determine the first information based on the first SSB and / or the second SSB.
[0253] The first PDCCH is used to schedule the first PDSCH carrying the first SIB, and the second PDCCH is used to schedule the second PDSCH carrying the second SIB. The first SIB is associated with the first SSB, and the second SIB is associated with the second SSB. The first and second SIBs can be at least one of the following: SIB1 mentioned earlier; system messages carrying ephemeris information, such as SIB19; or other system information (OSI). It should be understood that the first and second SIBs can also be common messages between cells in future communication systems.
[0254] In some embodiments, the first information may be carried in the first SSB and / or the second SSB, or the first information may be determined based on information in the first SSB and / or the second SSB. In other embodiments, the first information may be determined based on the frequency points where the first SSB and / or the second SSB are located. The implementation of the first information will be described in detail later, and will not be repeated here.
[0255] The aforementioned first information can be used to indicate that the information carried by the first PDCCH is the same as the information carried by the second PDCCH.
[0256] For example, the first information may be the same as the information carried by the first PDCCH and the second PDCCH. Alternatively, the first information may be support for merging and receiving the first PDCCH and the second PDCCH. The meaning of merged reception can be referred to the above description, and will not be repeated here for the sake of brevity.
[0257] For example, the first information may be information that supports determining the information carried in the first PDCCH based on the first PDCCH and the second PDCCH, i.e., the first DCI.
[0258] For example, the first information may be that the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH. Alternatively, the first information may be that the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH.
[0259] The fact that the original bits carried by the first PDCCH are the same as those carried by the second PDCCH can mean that the first DCI and the second DCI are the same, as mentioned above. Generally, adding redundant data to the information to be transmitted can improve the reliability of transmission. In the embodiments of this application, the fact that the original bits carried by the first PDCCH are the same as those carried by the second PDCCH can mean that the original bits in the first DCI are the same as those in the second DCI, and the redundant data in the first DCI is the same as the redundant data in the second DCI; or it can mean that the original bits in the first DCI are the same as those in the second DCI, but the redundant data in the first DCI is different from the redundant data in the second DCI.
[0260] It should be understood that the contents of the various types of first information mentioned above are interchangeable, and this application does not impose any restrictions on this.
[0261] S630, determine the information carried by the first PDCCH, i.e. the first DCI, based on the first PDCCH and the second PDCCH.
[0262] It should be understood that the first PDCCH is used to schedule the first PDSCH, that is, the DCI carried by the first PDCCH is used to schedule the first PDSCH. For example, the parameters in the DCI can indicate the time and frequency resources, modulation and coding scheme, etc. of the first PDSCH.
[0263] In some embodiments, a first PDCCH and a second PDCCH can be received and demodulated respectively. The DCI can be determined based on the demodulation results of the first PDCCH and the second PDCCH. In this scheme, the first PDCCH and the second PDCCH can use the same modulation and coding scheme or different modulation and coding schemes, which helps to improve the flexibility of the system. In addition, different modulation and coding schemes have different resistance to noise interference, so the probability of overlapping bits that cannot be successfully demodulated in the first PDCCH and bits that cannot be successfully demodulated in the second PDCCH is small, thereby helping to improve the performance of combined demodulation.
[0264] In some embodiments, signals from a first PDCCH and a second PDCCH can be received, and the signals from the first PDCCH and the second PDCCH can be merged. Demodulating the merged result yields the DCI carried in the first PDCCH. This scheme requires only one demodulation to obtain the DCI in the first PDCCH, which helps reduce processing complexity and latency caused by demodulation. It should be noted that the PDCCH signal mentioned here refers to the undemodulated signal. This scheme is applicable to scenarios where the information carried by the first PDCCH and the second PDCCH is the same, and the modulation and coding schemes of the first PDCCH and the second PDCCH are the same.
[0265] In other words, step S630 can be replaced by determining the DCI carried in the first PDCCH based on the signals of the first PDCCH and the second PDCCH; or it can be replaced by determining the DCI carried in the first PDCCH based on the demodulation results of the first PDCCH and the demodulation results of the second PDCCH.
[0266] In this embodiment of the application, the first information mentioned above enables the terminal device to receive PDCCHs used for scheduling PDSCHs carrying different SIBs within a period, which helps to improve the demodulation performance of PDCCHs and thus helps to reduce the access latency of the terminal device.
[0267] In some embodiments, step S630 shown in FIG6 can be replaced by: receiving a first PDCCH; receiving a second PDCCH if the first PDCCH cannot be successfully demodulated; and determining the DCI carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0268] In other words, the first PDCCH can be demodulated first. If the first PDCCH is successfully demodulated, there is no need to receive the second PDCCH. If the first PDCCH cannot be successfully demodulated, the second PDCCH can be received, and the first DCI can be determined based on the first PDCCH and the second PDCCH.
[0269] For example, the terminal device can determine whether the first PDCCH can be successfully demodulated based on the relationship between the signal-to-noise ratio of the first PDCCH and the threshold value. For example, when the signal-to-noise ratio of the first PDCCH is greater than or equal to the threshold value, the first PDCCH can be successfully demodulated, and when the signal-to-noise ratio of the first PDCCH is less than the threshold value, the first PDCCH cannot be successfully demodulated.
[0270] Compared with directly merging and receiving the first PDCCH and the second PDCCH, this scheme eliminates the need to receive the second PDCCH if the first PDCCH is successfully demodulated, thus saving power consumption for receiving the second PDCCH and resources for demodulating the second PDCCH.
[0271] As mentioned earlier, the first SSB can be the optimal SSB in the candidate SSB set. Using the last SSB in the candidate SSB set as the first SSB helps increase the probability of successful demodulation of the first PDCCH and helps avoid the combined reception of the first and second PDCCHs, thus saving resources.
[0272] It should be noted that, in the embodiments of this application, in order to improve demodulation performance, two PDCCHs with the same received bearer information can be merged, or more than two PDCCHs with the same received bearer information can be merged. In other words, merging received PDCCHs with the same received bearer information can refer to a single merged reception or multiple merged receptions. For example, if a single merged reception fails to successfully demodulate the first DCI, multiple merged receptions of the PDCCHs can be performed.
[0273] Taking a terminal device capable of receiving SSB#0, SSB#1, and SSB#2 as an example, SSB#0, SSB#1, and SSB#2 are associated with SSB#0, SSB#1, and SSB#2 respectively. The PDSCHs carrying SSB#0, SSB#1, and SSB#2 are PDSCH#0, PDSCH#1, and PDSCH#2 respectively, and the PDCCHs used for scheduling PDSCH#0, PDSCH#1, and PDSCH#2 are PDCCH#0, PDCCH#1, and PDCCH#2 respectively. If the first information indicates that the information carried by PDCCH#0, PDCCH#1, and PDCCH#2 is the same, any two PDCCHs among PDCCH#0, PDCCH#1, and PDCCH#2 can be received together, or PDCCH#0, PDCCH#1, and PDCCH#2 can be received together. Alternatively, PDCCH#0 and PDCCH#1 can be received in one go. If the first DCI still cannot be successfully demodulated based on the above merging result, PDCCH#2 and the above merging result can be received again to demodulate the first DCI.
[0274] After obtaining the first DCI, the first PDSCH can be received based on the first DCI. Considering the limited downlink budget, in some embodiments, the PDSCH can also be enhanced, such as enabling the information carried by the first PDSCH to be the same as the information carried by the second PDSCH, so as to support the combined reception of the first PDSCH and the second PDSCH.
[0275] The information carried by the first PDSCH is the same as that carried by the second PDSCH, which can mean that the original bits of the first PDSCH are the same as those of the second PDSCH. Alternatively, the information carried by the first PDSCH is the same as that carried by the second PDSCH, which can mean that the original bits of the first PDSCH are the same as those of the second PDSCH, and that the modulation and coding scheme of the first PDSCH is the same as that of the second PDSCH.
[0276] Considering that the first PDSCH carries the first SIB and the second PDSCH carries the second SIB, and that the information carried by the first PDSCH is the same as that carried by the second PDSCH, it can be replaced with the statement that the first SIB and the second SIB are the same.
[0277] Similarly, how the terminal device can determine that the information carried by the first PDSCH is the same as the information carried by the second PDSCH is a problem that needs to be solved.
[0278] In some embodiments, if the information carried by the first PDCCH is the same as the information carried by the second PDCCH, then the information carried by the first PDSCH is also the same as the information carried by the second PDSCH. Alternatively, if the information carried by the first PDCCH is different from the information carried by the second PDCCH, then the information carried by the first PDSCH is different from the information carried by the second PDSCH. In other words, the configuration binds whether the information carried by the PDCCH is the same to whether the information carried by the PDSCH is the same. This scheme only requires configuring whether the information carried by the first PDCCH is the same as the information carried by the second PDCCH, and then determines whether the information carried by the first PDSCH is the same as the information carried by the second PDSCH based on the configuration result. This scheme eliminates the need for additional configuration of whether the information carried by the PDSCH is the same, which helps reduce indication overhead.
[0279] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. That is, the first information can be used to indicate that the information carried by the first PDCCH is the same as the information carried by the second PDCCH, and that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. Multiplexing the first information to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH helps to save resource overhead.
[0280] In other embodiments, the second information can indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. For example, the second information is determined based on the first SSB and / or the second SSB; the first SIB is determined based on the first PDSCH and the second PDSCH.
[0281] For example, the second information may include the same information carried by the first PDSCH and the second PDSCH, or the first PDSCH and the second PDSCH may support combined reception. The meaning of combined reception can be found in the preceding description and will not be repeated here.
[0282] By indicating that the information carried by the first PDSCH is the same as that carried by the second PDSCH, the PDSCH can be configured independently to support merged reception, thereby helping to improve the flexibility of the system.
[0283] In some embodiments, a first PDSCH and a second PDSCH can be received and demodulated respectively. The first SIB can be determined based on the demodulation results of the first PDSCH and the second PDSCH. In this scheme, the first PDSCH and the second PDSCH can use the same modulation and coding scheme or different modulation and coding schemes, which helps to improve the flexibility of the system. Furthermore, different modulation and coding schemes have different resistance to noise interference, so the probability of overlapping bits that cannot be successfully demodulated in the first PDSCH and the second PDSCH is small, thereby helping to improve the performance of combined demodulation.
[0284] In some embodiments, the signals of the first PDSCH and the second PDSCH can be received, and the signals of the first PDSCH and the second PDSCH can be combined. Demodulating the combined result yields the first SIB carried in the first PDSCH. This scheme requires only one demodulation to obtain the first SIB, which helps reduce processing complexity and latency caused by demodulation. It should be noted that the PDCCH signal mentioned here refers to the received result without demodulation. This scheme is applicable to scenarios where the information carried by the first PDSCH and the second PDSCH is the same, and the modulation and coding schemes of the first PDSCH and the second PDSCH are the same.
[0285] To conserve resources, one possible approach is to first demodulate the first PDSCH. If demodulation fails, the second PDSCH is received, and the first SIB is determined based on both the first and second PDSCHs. Whether the first PDSCH can be successfully demodulated can be determined based on its signal-to-noise ratio (SNR), as explained earlier.
[0286] The following provides examples of various ways to implement the first information.
[0287] In some embodiments, the first information can be determined based on a first bit and a second bit carried in the first SSB. The first bit is associated with the first SSB, and the second bit is associated with the second SSB. Alternatively, the first bit corresponds to the first SSB, and the second bit corresponds to the second SSB.
[0288] The first bit and the second bit are both first values, used to indicate that the information carried by the first PDCCH is the same as the information carried by the second PDCCH, or to indicate that the combined reception of the first PDCCH and the second PDCCH is supported.
[0289] Conversely, if the value of the first bit and the value of the second bit are not the first value, but the third value, it is used to indicate that the information carried by the first PDCCH is different from the information carried by the second PDCCH, or to indicate that the combined reception of the first PDCCH and the second PDCCH is not supported.
[0290] In other words, step S620 in Figure 6 can be replaced by: determining the first information based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both the first value.
[0291] The first SSB can also be replaced by the second SSB. That is, the second SSB can also include the first bit associated with the first SSB and the second bit associated with the second SSB, so as to ensure that terminal devices within the coverage area of the first SSB and terminal devices within the coverage area of the second SSB can both obtain the first information.
[0292] As an example, the first SSB may include multiple bits, including the first bit and the second bit mentioned above. Taking an example of 8 SSBs, the first SSB may include 8 bits, where each bit corresponds to one SSB. The SSBs associated with the SSBs whose bits have a first value carry the same information in their related channels; in other words, the related channels of the SSBs associated with the SSBs whose bits have a first value support combined reception. For ease of description, the PDCCH used to schedule the PDSCH carrying the SIB, and / or the PDSCH carrying the SIB, are referred to as the related channels of the SIB.
[0293] For example, the above 8 bits, from the most significant bit to the least significant bit, correspond to SSB#0, SSB#1, ..., SSB#7 respectively. Taking the first value as 1 as an example, the above 8 bits are 01100010, which indicates that the information carried by the related channels of SSB#1, SSB#2, and SSB#6 is the same; the above 8 bits are 00001110, which indicates that the information carried by the related channels of SSB#4, SSB#5, and SSB#6 is the same.
[0294] Alternatively, if the above 8 bits are 01100010, it indicates that the information carried by the relevant channels of the SIBs associated with SSB#0, SSB#3, SSB#4, SSB#5, and SSB#7 is different; if the above 8 bits are 00001110, it indicates that the information carried by the relevant channels of the SIBs associated with SSB#0, SSB#1, SSB#2, SSB#3, and SSB#7 is different.
[0295] The above 8 bits can also be called a bit map.
[0296] It should be understood that the above-mentioned first value of 1 is given only as an example, and the first value can also be 0, which is not limited in this application.
[0297] For example, the first bit and the second bit can be newly added bits in the SSB, such as the first bit and the second bit can be carried in the extended bits of the MIB.
[0298] In this embodiment, the values of the first bit and the second bit are used to indicate that the first SSB and the second SSB are the same. The information carried by the related channels of the SIBs associated with different SSBs can be configured to be the same as required, which helps to improve the flexibility of the system.
[0299] In addition, multiple SSBs can carry the first bit and the second bit. For example, all SSBs within a period can carry the above 8 bits to ensure that terminal devices within the coverage area can obtain the first information and provide support for downlink enhancement of terminal devices within the coverage area.
[0300] In some embodiments, the first information can be determined based on a first identifier carried in a first SSB and a second identifier carried in a second SSB. Wherein, the first identifier and the second identifier are the same to indicate that the information carried by the first PDCCH is the same as the information carried by the second PDCCH, or to indicate support for combined reception of the first PDCCH and the second PDCCH. Conversely, the first identifier and the second identifier are different to indicate that the information carried by the first PDCCH is different from the information carried by the second PDCCH, or to indicate that combined reception of the first PDCCH and the second PDCCH is not supported.
[0301] In other words, step S620 in Figure 6 can be replaced by: determining the first information based on the first identifier carried in the first SSB and the second identifier carried in the second SSB, wherein the first identifier and the second identifier are the same.
[0302] For example, the first identifier and the second identifier can be represented by a single bit, which helps to save indication resources. In this case, the values of the first identifier and the second identifier are in the range of 0 and 1. For example, the value of the aforementioned bit in the first SSB is 0, the value of the aforementioned bit in the second SSB is 0, and the information carried in the first PDCCH is the same as the information carried in the second PDCCH; or, the value of the aforementioned bit in the first SSB is 1, the value of the aforementioned bit in the second SSB is 1, and the information carried in the first PDCCH is the same as the information carried in the second PDCCH.
[0303] For example, the first identifier and / or the second identifier can be carried in the spare bit and / or cell-barred field in the MIB, thereby helping to save indication overhead. Alternatively, the first information can be determined based on the spare bit or cell-barred field in the first SSB and the second SSB.
[0304] For example, the first identifier and the second identifier can be represented by multiple bits. Taking the first identifier and the second identifier as represented by 3 bits as an example, the value range of the first identifier and the second identifier can be 0 to 7. For example, if the value of the above 3 bits in the first SSB is 2, that is, the first identifier is 2, and the value of the above 3 bits in the second SSB is 2, that is, the second identifier is 2, then the information carried in the first PDCCH is the same as the information carried in the second PDCCH.
[0305] In this case, other values of the aforementioned bits can also be used to configure the information carried by the related channels of SIBs associated with other SSBs, except for the first SSB and the second SSB, to be the same. Taking SSB#0, SSB#1, ..., SSB#7 as an example, the identifier in SSB#0 is 0, the identifiers in SSB#1 and SSB#2 are both 1, the identifier in SSB#2 is 2, the identifier in SSB#3 is 3, and the identifiers in SSB#4, SSB#5, and SSB#6 are 4. SSB#1 is the first SSB, and SSB#2 is the second SSB, so both the first and second identifiers are 1, and the information carried in the first PDCCH is the same as the information carried in the second PDCCH; since the identifiers in SSB#4, SSB#5, and SSB#6 are the same, the information carried by the related channels of the SIBs associated with SSB#4, SSB#5, and SSB#6 is the same.
[0306] In other words, the identifier carried in the SSB is represented by the above multiple bits, which can simultaneously configure the information carried by the related channels of SSB#1 and SSB#2 to be the same, as well as the information carried by the related channels of SSB#4, SSB#5, and SSB#6 to be the same, which is highly flexible.
[0307] Referring to Table 8 mentioned above, the 3 bits indicating the SSB index are carried in the PBCH payload. For example, the first and second identifiers can reuse multiple bits (i.e., the 3 bits mentioned above) indicating the SSB index. For instance, the first identifier can be carried in the remaining bits besides indicating the first SSB index, and the second identifier can be carried in the remaining bits besides indicating the second SSB index. This scheme helps save indicator resources and reduce overhead.
[0308] In related technologies, in the operating frequency band FR1, at 3 GHz and below, the number of SSBs is at most 4, requiring only 2 bits to indicate the SSB index; in the 3 GHz-6 GHz band, the number of SSBs is at most 8, requiring only 3 bits to indicate the SSB index; in the operating frequency band FR2, the number of SSBs is at most 64, requiring 6 bits to indicate the SSB index.
[0309] As can be seen, in FR1, a maximum of only 3 bits are needed, that is, the lower 3 bits are sufficient to indicate the SSB index. In this case, the middle 3 bits indicating the SSB index can be reused. To indicate the first and second identifiers. That is to say, Including multiple meanings, in FR1, Used to determine the first piece of information, in FR2, The index used to indicate the SSB.
[0310] In some embodiments, both the first SSB and the second SSB carry a "same" identifier, indicating that the information carried by the first PDCCH and the information carried by the second PDCCH are the same. Alternatively, both the first SSB and the second SSB carry a "different" identifier, indicating that the information carried by the first PDCCH and the information carried by the second PDCCH are different.
[0311] In some embodiments, the first SSB carries a cell-specific identifier, and the second SSB carries a cell-specific identifier, indicating that the information carried by the first PDCCH is the same as the information carried by the second PDCCH.
[0312] The first SSB carries a beam-specific identifier, and the second SSB also carries a beam-specific identifier, indicating that the information carried by the first PDSCH is different from that carried by the second PDSCH. This is because the content of cell-level system messages is usually the same, allowing the information carried by the first and second PDSCHs to be identical; however, the content of beam-level system messages may differ, potentially preventing the information carried by the first and second PDSCHs from being identical.
[0313] In some embodiments, the first information can be determined based on the third bit in the first SSB. Wherein, a third bit value equal to the second value indicates that the information carried by the related channels of the SIBs associated with the SSBs in the SSB burst set to which the first SSB belongs is the same. Conversely, a third bit value not equal to the second value indicates that the information carried by the related channels of the SIBs associated with the SSBs in the SSB burst set to which the first SSB belongs is different.
[0314] The third bit allows for the configuration of whether the information carried by the relevant channels of multiple SSBs associated with a single SSB burst is identical, thus helping to save configuration resources. For example, the third bit can be a reserved bit in the MIB or a cell access prohibition field, eliminating the need to extend the SSB and thus reducing indication overhead.
[0315] For example, the terminal device can determine whether the first SSB and the second SSB belong to the same SSB burst set based on the PCI. If the physical cell identifier (PCI) determined based on the first SSB is the same as the PCI determined based on the second SSB, then the first SSB and the second SSB belong to the same SSB burst set. If the PCI determined based on the first SSB is different from the PCI determined based on the second SSB, then the first SSB and the second SSB do not belong to the same SSB burst set. When the terminal device is located at the cell edge, the first SSB and the second SSB searched by the terminal device may belong to adjacent cells. In this case, the first SSB and the second SSB belong to different SSB burst sets.
[0316] When the first SSB and the second SSB belong to the same SSB burst set, the third bit is set to the second value to indicate that the information carried by the first PDCCH is the same as that carried by the second PDCCH; otherwise, the third bit is not set to the second value to indicate that the information carried by the first PDCCH is different from that carried by the second PDCCH.
[0317] Alternatively, step S620 in Figure 6 can be replaced by: determining the first information based on the third bit in the first SSB, where the value of the third bit is the second value.
[0318] The second value can be, for example, 1 or 0, and this application does not limit it.
[0319] In some embodiments, the first information can be determined based on the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. Wherein, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group, and the information used to characterize the first PDCCH bearer is the same as the information used to characterize the second PDCCH bearer. Alternatively, at least one GSCN among the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB does not belong to the first GSCN group, and the information used to characterize the first PDCCH bearer is different from the information used to characterize the second PDCCH bearer.
[0320] Alternatively, step S620 in Figure 6 can be replaced by: determining the first information based on the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB, wherein the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group.
[0321] The GSCNs included in the first GSCN group can be predefined or preconfigured to save instruction resources.
[0322] By using the GSCN corresponding to the center frequency of the SSB to indicate whether the information carried by the first PDCCH is the same as that carried by the second PDCCH, the terminal side can enable the information carried by the first PDCCH to be the same as that carried by the second PDCCH without adding additional indication information, thus helping to save indication overhead. In addition, since the GSCN corresponding to the center frequency of the SSB can be obtained during the SSB search process, this scheme can directly reuse the GSCN, making it simple to implement.
[0323] It should be understood that the implementation method of the second information mentioned above can refer to the relevant introduction of the implementation method of the first information, and will not be repeated for the sake of brevity.
[0324] The communication method provided in the embodiments of this application will be described exemplarily below with reference to Figure 7. The method shown in Figure 7 may include steps 1 to 4.
[0325] Step 1: The network device sends multiple SSBs, and the terminal device receives multiple SSBs accordingly.
[0326] After receiving the SSB, the terminal device can perform downlink synchronization based on the SSB.
[0327] The terminal device can determine candidate SSBs based on the received signals, such as determining the candidate SSB index set {i}. The SSBs that the terminal device can search for or receive are candidate SSBs. Taking Figure 3 as an example, candidate SSBs can include SSB#0, SSB#1, and SSB#2, that is, the candidate SSB index set is {0,1,2}.
[0328] Based on the method mentioned above, the search space of the SIB associated with the SSB can be determined according to the index of the SSB, such as the search space of the PDCCH used to schedule the PDSCH carrying the SIB.
[0329] Step 2: The terminal device determines the first information, or determines the first information and the second information.
[0330] The terminal device can determine first information, or first information and second information, based on the received SSB, such as a first SSB and / or a second SSB. The first SSB is associated with a first SIB, the second SSB is associated with a second SIB, the first PDCCH is used to schedule a first PDSCH carrying the first SIB, and the second PDCCH is used to schedule a second PDSCH carrying the second SIB.
[0331] The first information indicates that the information carried by the first PDCCH is the same as the information carried by the second PDCCH, or in other words, the first information indicates support for receiving the first PDCCH and the second PDCCH together. The second information indicates that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, or in other words, the second information indicates support for receiving the first PDSCH and the second PDSCH together.
[0332] The first piece of information can be determined, for example, based on reserved bits in the MIB. The reserved bits take the second value mentioned earlier, indicating that the information carried by the relevant channels of the SIB associated with the SSB in the SSB burst set is the same. When the first SSB and the second SSB belong to the same SSB burst set, the reserved bits take the second value, indicating that the information carried by the first PDCCH is the same as the information carried by the second PDCCH. This method eliminates the need to add indicator bits to the SSB, helping to reduce indicator overhead.
[0333] The first information can be determined, for example, based on the bits other than those indicating the first SSB index from the multiple bits used to indicate the SSB index. For FR1, at most 3 bits are needed to indicate the SSB index; that is, 3 bits obtained from the DMRS signal of the PBCH channel are sufficient to indicate the SSB index, with the remaining 3 bits used to indicate the SSB index... That is, bits 30, 31, and 32 in Table 8 can be used to determine the first piece of information. If multiple SSBs... If the values are the same, then the information carried by the related channels of multiple SSBs associated with each other is the same.
[0334] The above a A+5 ,a A+6 ,a A+7 It can be used to represent the first and second identifiers mentioned above. In the first SSB... The value can be the first identifier, or in the second SSB. The value can be a second identifier, where the first and second identifiers are the same, indicating that the information carried by the first PDCCH is the same as the information carried by the second PDCCH. This scheme, on the one hand, can reuse the bits indicating the SSB index, helping to reduce indication overhead. On the other hand, the above... Multiple values can be used to configure the information carried by the first PDCCH to be the same as that carried by the second PDCCH, and the information carried by multiple other PDCCHs (multiple PDCCHs are used to schedule PDSCHs carrying different SIBs), which helps to improve the flexibility of the system.
[0335] For FR2, due to the above The index used to indicate the SSB can be used to determine the first information by using the reserved bits, cell access prohibition bits, or newly added bits in the SSB mentioned above.
[0336] The first information can also be determined based on a bitmap. If the number of SSBs is 8, then the bitmap can include 8 bits, where each bit corresponds to one SSB. The SSB associated with the bit that takes the first value has the same channel-carrying information. These 8 bits can include, for example, the first bit and the second bit mentioned earlier. The first bit corresponds to the first SSB, and the second bit corresponds to the second SSB. The first bit and the second bit taking the first value indicate that the information carried by the first PDCCH is the same as the information carried by the second PDCCH.
[0337] The first piece of information can also be determined based on the GSCN corresponding to the center frequency of the received SSB. If the GSCN corresponding to the center frequency of the SSB received by the terminal device belongs to the first GSCN group, then the information carried by the relevant channels of the SIB associated with the SSB received by the terminal device is the same.
[0338] Step 2 can also be replaced by: The terminal device can determine whether the relevant channels of the SIBs associated with the multiple SSBs supported merged reception.
[0339] Step 3: Receive the PDCCH used for scheduling the PDSCH carrying system messages, and receive the PDSCH carrying system messages. The system messages may refer to at least one of SIB1, SIB19, or OSI.
[0340] Taking the SSBs that the terminal device can receive as including the first SSB and the second SSB as an example, step 4 can be to merge the reception of the first PDCCH and the second PDCCH, or to determine the information carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0341] Step 4 can also be to determine the information carried by the first PDSCH based on the first PDSCH and the second PDSCH.
[0342] For example, the first PDCCH is received based on the time-frequency resource location of the first PDCCH determined in step 1, and the second PDCCH is received based on the time-frequency resource location of the second PDCCH. Combined reception can refer to combining the signals of the first PDCCH and the second PDCCH, and then demodulating the combined result; or it can refer to combining the demodulated result of the first PDCCH and the demodulated result of the second PDCCH.
[0343] As one possible implementation, the terminal device can determine whether to merge the reception of the first PDCCH and the second PDCCH based on whether the first PDCCH can be successfully demodulated. For example, the terminal device can determine whether the first PDCCH can be successfully demodulated based on the relationship between the signal-to-noise ratio (SNR) of the first PDCCH and a threshold value. If the SNR of the first PDCCH is greater than or equal to the threshold value, the first PDCCH can be successfully demodulated; if the SNR of the first PDCCH is less than the threshold value, the first PDCCH cannot be successfully demodulated.
[0344] If the first PDCCH fails to demodulate, the terminal device determines the information carried by the first PDCCH based on the first and second PDCCHs. The determination method is described above and will not be repeated here.
[0345] Based on the information carried by the first PDCCH, i.e., the first DCI, the time-frequency resource location and modulation scheme of the first PDSCH can be determined. If the first PDSCH cannot be successfully demodulated, and if the second information indicates that the first PDSCH and the second PDSCH support combined reception, the information carried by the first PDSCH, i.e., the first SIB, can be determined based on the first PDSCH and the second PDSCH.
[0346] Random access can be initiated based on the first SIB, enabling the terminal device to establish a connection with the network device.
[0347] This application embodiment improves the demodulation performance of PDCCH by enabling terminal devices to merge the reception of PDSCHs carrying different SIBs within a single cycle; and it also improves the demodulation performance of PDSCHs by enabling terminal devices to merge the reception of PDSCHs carrying different SIBs within a single cycle. The improved demodulation performance of both PDCCH and PDSCH helps reduce the access latency of terminal devices.
[0348] It should be noted that, in the embodiments of this application, if the information carried by the first PDCCH is the same as that carried by the second PDCCH, it can also be replaced by supporting the combined reception of the first PDCCH and the second PDCCH; if the information carried by the first PDCCH is different from that carried by the second PDCCH, it can also be replaced by not supporting the combined reception of the first PDCCH and the second PDCCH. Similarly, if the information carried by the first PDSCH is the same as that carried by the second PDSCH, it can also be replaced by supporting the combined reception of the first PDSCH and the second PDSCH; if the information carried by the first PDSCH is different from that carried by the second PDSCH, it can also be replaced by not supporting the combined reception of the first PDSCH and the second PDSCH.
[0349] It should be understood that the preceding text uses PDCCH and PDSCH as examples to introduce the method of downlink coverage enhancement and how to indicate the downlink coverage enhancement mode. The method provided in this application embodiment can also be applied to other types of common channels, such as PDSCH carrying OSI, or PDCCH that schedules PDSCH carrying OSI, etc.
[0350] It should be noted that the order of appearance of the steps in the embodiments described above in this application does not represent the order in which the steps are executed. The steps in the embodiments described above in this application can also be executed in other orders, all of which are within the protection scope of this application.
[0351] It is understood that some optional features in the embodiments of this application may not depend on other features in certain scenarios, or may be combined with other features in certain scenarios. This application does not limit this.
[0352] The method embodiments provided in this application have been described above. The apparatus embodiments provided in this application will be described below. It should be understood that the description of the apparatus embodiments corresponds to the description of the method embodiments. Therefore, any content not described in detail can be referred to the method embodiments above. For the sake of brevity, it will not be repeated here.
[0353] Figure 8 is an exemplary block diagram of a communication device provided in an embodiment of this application. As shown in Figure 8, the communication device includes: a receiving unit 810, a first determining unit 820, and a second determining unit 830.
[0354] The communication device 800 can be a terminal-side device in the above embodiments, such as a terminal or a component in the terminal, such as a module, a communication module, or a circuit or chip in the terminal responsible for communication functions, or a logic node, logic module, or software that can realize all or part of the functions of the communication device.
[0355] For example, the receiving unit 810 is used to receive a first synchronization signal block (SSB) and a second SSB; the first determining unit 820 is used to determine first information based on the first SSB and / or the second SSB, wherein the first information is used to indicate that the information carried by the first physical downlink control channel (PDCCH) and the information carried by the second PDCCH are the same, the first PDCCH is used to schedule the first physical downlink shared channel (PDSCH) carrying the first system message block (SIB), the second PDCCH is used to schedule the second PDSCH carrying the second SIB, the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB; the second determining unit 830 is used to determine the downlink control information (DCI) carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0356] In some embodiments, the second determining unit 830 is specifically configured to: receive the first PDCCH; if the first PDCCH cannot be successfully demodulated, receive the second PDCCH; and determine the DCI carried by the first PDCCH based on the first PDCCH and the second PDCCH.
[0357] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, the first information is further used to indicate that the first SIB and the second SIB are the same.
[0358] In some embodiments, the apparatus further includes: a third determining unit, configured to determine second information based on the first SSB and / or the second SSB, the second information being used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; and a fourth determining unit, configured to determine the first SSB based on the first PDSCH and the second PDSCH.
[0359] In some embodiments, the first determining unit is specifically used to: determine the first information based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values; wherein the first bit and the second bit being both first values is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0360] In some embodiments, the first determining unit is specifically configured to: determine the first information based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; wherein the first identifier being the same as the second identifier is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0361] In some embodiments, the first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
[0362] In some embodiments, the first SSB and the second SSB belong to the same SSB burst set, and the first determining unit is specifically used to: determine the first information based on the third bit in the first SSB, wherein the value of the third bit is a second value; wherein the value of the third bit as a second value is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0363] In some embodiments, the first determining unit is specifically configured to: determine the first information based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB, wherein the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to a first GSCN group; wherein, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belonging to the first GSCN group is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0364] In some embodiments, the information carried by the first PDCCH and the information carried by the second PDCCH are the same, including: the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0365] In one possible design, when the communication device 800 is a terminal or a communication module within a terminal, the functions of the first determining unit 820 and the second determining unit 830 can be implemented by one or more processors. Specifically, the processor may include a modem chip, or a SoC chip or SIP chip containing a modem core. The function of the receiving unit 810 can be implemented by a transceiver circuit.
[0366] In one possible design, when the communication device 800 is a circuit or chip in a terminal responsible for communication functions, such as a modem chip or a SoC chip or SIP chip containing a modem core, the functions of the first determining unit 820 and the second determining unit 830 can be implemented by a circuit system in the aforementioned chip that includes one or more processors or processor cores. The function of the receiving unit 810 can be implemented by the interface circuit or data transceiver circuit on the aforementioned chip.
[0367] Figure 9 is another exemplary block diagram of a communication device provided in an embodiment of this application. As shown in Figure 9, the communication device includes a transmitting unit 910.
[0368] The communication device 900 can be a network-side device in the above embodiments, such as a network device or a component in a network device, such as a module, a communication module, or a circuit or chip in a network device that is responsible for communication functions, or a logic node, logic module, or software that can realize all or part of the functions of the communication device.
[0369] For example, the transmitting unit 910 is used to transmit a first synchronization signal block (SSB) and a second SSB; wherein the first SSB and / or the second SSB is used to determine first information, the first information is used to indicate that the information carried by the first physical downlink control channel (PDCCH) and the information carried by the second PDCCH are the same, the first PDCCH is used to schedule the first physical downlink shared channel (PDSCH) carrying the first system message block (SIB), the second PDCCH is used to schedule the second PDSCH carrying the second SIB, the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB.
[0370] In some embodiments, the first information is further used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, the first information is further used to indicate that the first SIB and the second SIB are the same.
[0371] In some embodiments, the first SSB and / or the second SSB are used to determine second information, which indicates that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0372] In some embodiments, the first information is determined based on a first bit associated with the first SSB and a second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values; wherein the first bit and the second bit being both first values is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0373] In some embodiments, the first information is determined based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; wherein the first identifier being the same as the second identifier is used to characterize that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0374] In some embodiments, the first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
[0375] In some embodiments, the first SSB and the second SSB belong to the same SSB burst set, and the first information is determined based on the third bit in the first SSB, wherein the value of the third bit is a second value; wherein the value of the third bit as the second value is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0376] In some embodiments, the first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to a first GSCN group. The fact that the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group is used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
[0377] In some embodiments, the information carried by the first PDCCH and the information carried by the second PDCCH are the same, including: the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or the original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as the modulation and coding scheme of the second PDCCH.
[0378] In one possible design, when the communication device 900 is a network device or a communication module in a network device, the function of the transmitting unit 910 can be implemented by a transceiver circuit.
[0379] In one possible design, when the communication device 900 is a circuit or chip in a network device that is responsible for communication functions, such as a modem chip or a SoC chip or SIP chip containing a modem core, the function of the transmitting unit 910 can be implemented by the interface circuit or data transceiver circuit on the aforementioned chip.
[0380] For details regarding the steps or processes executed by each unit in communication device 800 or communication device 900, please refer to the descriptions in the corresponding methods; they will not be elaborated here.
[0381] It should be understood that the "unit" in communication device 800 or communication device 900 can be implemented in hardware, software, or by hardware executing corresponding software. For example, the "unit" can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors) and memories for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functions.
[0382] Figure 10 is another exemplary block diagram of the communication device provided in the embodiments of this application. The communication device 1000 can be a terminal device / network device, a communication module within a terminal device / network device, or a component within a terminal device / network device, such as a module, a circuit or chip responsible for communication functions, or a logic node, logic module, or software capable of implementing all or part of the communication device functions. This device can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.
[0383] The communication device 1000 may include one or more processors 1010, which may also be referred to as processing units, and can implement certain control functions. The processor 1010 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, while the central processing unit can be used to control the communication device, execute software programs, and process data from the software programs.
[0384] In an alternative design, the processor 1010 may also store instructions and / or data that can be executed by the processor 1010 to cause the communication device 1000 to perform the methods described in the above method embodiments.
[0385] In another alternative design, the communication device 1000 may include a communication interface 1020 for implementing receiving and transmitting functions. For example, the communication interface 1020 may be a transceiver circuit, interface, interface circuit, or transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or it may be used for transmitting or relaying signals.
[0386] Optionally, the communication device 1000 may include one or more memories 1030, which may store instructions that can be executed on the processor 1010, causing the communication device 1000 to perform the methods described in the above method embodiments. Optionally, the memories 1030 may also store data. Optionally, the processor 1010 may also store instructions and / or data. The processor 1010 and the memories 1030 may be provided separately or integrated together.
[0387] It should be understood that, in one possible design, the steps in the method embodiments provided in this application can be implemented by integrated logic circuits in the processor's hardware or by instructions in software form. The steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.
[0388] It should be noted that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by the integrated logic circuitry in the processor's hardware or by instructions in software form. The processor can be 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 devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above methods.
[0389] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, 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 linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.
[0390] This application also provides a computer program product, which includes computer program code. When the computer program code is run on a computer, it causes the computer to execute the various steps or processes executed by the terminal device / network device in any of the above method embodiments.
[0391] This application also provides a computer-readable storage medium storing program code that, when run on a computer, causes the computer to execute the various steps or processes performed by the terminal device / network device in any of the above method embodiments.
[0392] This application also provides a communication device, including a processor and an interface, the interface being used to send and / or receive signals, causing the processor to execute the various steps or processes executed by the terminal device / network device in any of the above method embodiments.
[0393] The above-described device and method embodiments are completely corresponding, with corresponding modules or units performing corresponding steps. For example, a communication unit or communication interface performs the receiving or sending steps in the method embodiment, while other steps besides sending and receiving can be performed by a processing unit or processor.
[0394] In the embodiments of this application, the terms and English abbreviations are exemplary examples given for ease of description and should not be construed as limiting the application in any way. The embodiments of this application do not preclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.
[0395] As used in this specification, the terms "component," "module," "system," etc., are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable storage media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).
[0396] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.
[0397] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be based on the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0398] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0399] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0400] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0401] In the above embodiments, the functions of each functional unit can be implemented entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks, SSDs), etc.
[0402] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially or in other words, the parts that contribute to the prior art, or parts of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0403] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A communication method, characterized in that, include: Receive the first synchronization signal block SSB and the second SSB; First information is determined based on the first SSB and / or the second SSB. The first information is used to indicate that the information carried by the first physical downlink control channel PDCCH is the same as the information carried by the second PDCCH. The first PDCCH is used to schedule the first physical downlink shared channel PDSCH carrying the first system message block SIB. The second PDCCH is used to schedule the second PDSCH carrying the second SIB. The first SIB is associated with the first SSB, and the second SIB is associated with the second SSB. The downlink control information (DCI) carried by the first PDCCH is determined based on the first PDCCH and the second PDCCH.
2. The method according to claim 1, characterized in that, The step of determining the downlink control information (DCI) carried by the first PDCCH based on the first PDCCH and the second PDCCH includes: Receive the first PDCCH; If the first PDCCH fails to demodulate, the second PDCCH is received; The DCI carried by the first PDCCH is determined based on the first PDCCH and the second PDCCH.
3. The method according to claim 1 or 2, characterized in that, The method further includes: The second information is determined based on the first SSB and / or the second SSB, and the second information is used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. The first SIB is determined based on the first PDSCH and the second PDSCH.
4. The method according to any one of claims 1-3, characterized in that, The step of determining the first information based on the first SSB and / or the second SSB includes: The first information is determined based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values. The value of the first bit and the value of the second bit are both first values, which are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
5. The method according to any one of claims 1-3, characterized in that, The step of determining the first information based on the first SSB and / or the second SSB includes: The first information is determined based on the first identifier carried in the first SSB and the second identifier carried in the second SSB, wherein the first identifier and the second identifier are the same; Wherein, the first identifier and the second identifier are the same and are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
6. The method according to any one of claims 1-3, characterized in that, The first SSB and the second SSB belong to the same SSB burst set. Determining the first information based on the first SSB and / or the second SSB includes: The first information is determined based on the third bit in the first SSB, wherein the value of the third bit is a second value; The third bit is set to a second value to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
7. The method according to any one of claims 1-3, characterized in that, The step of determining the first information based on the first SSB and / or the second SSB includes: The first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group. Among them, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group, which is used to characterize the information carried by the first PDCCH and the information carried by the second PDCCH.
8. A communication method, characterized in that, include: Send the first synchronization signal block SSB and the second SSB; Wherein, the first SSB and / or the second SSB are used to determine first information, the first information being used to indicate that the information carried by the first physical downlink control channel PDCCH and the information carried by the second PDCCH are the same, the first PDCCH is used to schedule the first physical downlink shared channel PDSCH carrying the first system message block SIB, the second PDCCH is used to schedule the second PDSCH carrying the second SIB, the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB.
9. The method according to any one of claims 1, 2, or 8, characterized in that, The first information is also used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, The first information is also used to indicate that the first SIB and the second SIB are the same.
10. The method according to claim 8 or 9, characterized in that, The first SSB and / or the second SSB are used to determine second information, which indicates that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
11. The method according to any one of claims 8-10, characterized in that, The first information is determined based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values. The value of the first bit and the value of the second bit are both first values, which are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
12. The method according to any one of claims 8-10, characterized in that, The first information is determined based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; Wherein, the first identifier and the second identifier are the same and are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
13. The method according to claim 5 or 12, characterized in that, The first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
14. The method according to any one of claims 8-10, characterized in that, The first SSB and the second SSB belong to the same SSB burst set. The first information is determined based on the third bit in the first SSB, and the value of the third bit is the second value. The third bit is set to a second value to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
15. The method according to any one of claims 8-10, characterized in that, The first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group. Among them, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group, which is used to characterize the information carried by the first PDCCH and the information carried by the second PDCCH.
16. The method according to any one of claims 1-15, characterized in that, The information carried by the first PDCCH is the same as the information carried by the second PDCCH, including: The original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or The original bits carried by the first PDCCH are the same as those carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as that of the second PDCCH.
17. A communication device, characterized in that, include: The receiving unit is used to receive the first synchronization signal block (SSB) and the second SSB. A first determining unit is configured to determine first information based on the first SSB and / or the second SSB. The first information is used to indicate that the information carried by the first physical downlink control channel PDCCH is the same as the information carried by the second PDCCH. The first PDCCH is used to schedule the first physical downlink shared channel PDSCH carrying the first system message block SIB, and the second PDCCH is used to schedule the second PDSCH carrying the second SIB. The first SIB is associated with the first SSB, and the second SIB is associated with the second SSB. The second determining unit is used to determine the downlink control information (DCI) carried by the first PDCCH based on the first PDCCH and the second PDCCH.
18. The apparatus according to claim 17, characterized in that, The second determining unit is specifically used for: Receive the first PDCCH; If the first PDCCH fails to demodulate, the second PDCCH is received; The DCI carried by the first PDCCH is determined based on the first PDCCH and the second PDCCH.
19. The apparatus according to claim 17 or 18, characterized in that, The device further includes: The third determining unit is configured to determine second information based on the first SSB and / or the second SSB, wherein the second information is used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. The fourth determining unit is used to determine the first SIB based on the first PDSCH and the second PDSCH.
20. The apparatus according to any one of claims 17-19, characterized in that, The first determining unit is specifically used for: The first information is determined based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values. The value of the first bit and the value of the second bit are both first values, which are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
21. The apparatus according to any one of claims 17-19, characterized in that, The first determining unit is specifically used for: The first information is determined based on the first identifier carried in the first SSB and the second identifier carried in the second SSB, wherein the first identifier and the second identifier are the same; Wherein, the first identifier and the second identifier are the same and are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
22. The apparatus according to any one of claims 17-19, characterized in that, The first SSB and the second SSB belong to the same SSB burst set, and the first determining unit is specifically used for: The first information is determined based on the third bit in the first SSB, wherein the value of the third bit is a second value; The third bit is set to a second value to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
23. The apparatus according to any one of claims 17-19, characterized in that, The first determining unit is specifically used for: The first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group. Among them, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group, which is used to characterize the information carried by the first PDCCH and the information carried by the second PDCCH.
24. A communication device, characterized in that, include: The transmitting unit is used to transmit the first synchronization signal block SSB and the second SSB; Wherein, the first SSB and / or the second SSB are used to determine first information, the first information being used to indicate that the information carried by the first physical downlink control channel PDCCH and the information carried by the second PDCCH are the same, the first PDCCH is used to schedule the first physical downlink shared channel PDSCH carrying the first system message block SIB, the second PDCCH is used to schedule the second PDSCH carrying the second SIB, the first SIB is associated with the first SSB, and the second SIB is associated with the second SSB.
25. The apparatus according to any one of claims 17, 18 or 24, characterized in that, The first information is also used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; or, The first information is also used to indicate that the first SIB and the second SIB are the same.
26. The apparatus according to claim 24 or 25, characterized in that, The first SSB and / or the second SSB are used to determine second information, which indicates that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
27. The apparatus according to any one of claims 24-26, characterized in that, The first information is determined based on the first bit associated with the first SSB and the second bit associated with the second SSB, wherein the value of the first bit and the value of the second bit are both first values. The value of the first bit and the value of the second bit are both first values, which are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
28. The apparatus according to any one of claims 24-26, characterized in that, The first information is determined based on a first identifier carried in the first SSB and a second identifier carried in the second SSB, wherein the first identifier is the same as the second identifier; Wherein, the first identifier and the second identifier are the same and are used to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
29. The apparatus according to claim 21 or 28, characterized in that, The first SSB includes a plurality of bits for indicating the index of the first SSB, and the first identifier is carried in the remaining bits of the plurality of bits other than those indicating the index of the first SSB.
30. The apparatus according to any one of claims 24-26, characterized in that, The first SSB and the second SSB belong to the same SSB burst set. The first information is determined based on the third bit in the first SSB, and the value of the third bit is the second value. The third bit is set to a second value to indicate that the information carried by the first PDCCH and the information carried by the second PDCCH are the same.
31. The apparatus according to any one of claims 24-26, characterized in that, The first information is determined based on the Global Synchronization Channel Number (GSCN) corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB. The GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group. Among them, the GSCN corresponding to the center frequency of the first SSB and the GSCN corresponding to the center frequency of the second SSB belong to the first GSCN group, which is used to characterize the information carried by the first PDCCH and the information carried by the second PDCCH.
32. The apparatus according to any one of claims 17-31, characterized in that, The information carried by the first PDCCH is the same as the information carried by the second PDCCH, including: The original bits carried by the first PDCCH are the same as the original bits carried by the second PDCCH; or The original bits carried by the first PDCCH are the same as those carried by the second PDCCH, and the modulation and coding scheme of the first PDCCH is the same as that of the second PDCCH.
33. A readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed, the computer performs the method as described in any one of claims 1-16.
34. A computer program product, characterized in that, It includes computer program instructions that cause the computer to perform the method as described in any one of claims 1-16.