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 CN2026077659_13082026_PF_FP_ABST
Abstract
Description
Communication methods and communication devices
[0001] This application claims priority to Chinese Patent Application No. 202510134727.7, 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: receiving first information, the first information being used to indicate that the information carried by a first physical downlink shared channel (PDSCH) is the same as the information carried by a second PDSCH; or, if a first condition is met, determining that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, the first condition being related to the position of the first PDSCH and / or the position of the second PDSCH; wherein, the system information block (SIB) carried by the first PDSCH is associated with a first synchronization signal / physical broadcast channel block (SS / PBCH block or SSB), and the SIB carried by the second PDSCH is associated with a second SSB; and determining the SIB carried by the first PDSCH based on the first PDSCH and the second PDSCH.
[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 SIB and the second SIB can be at least one of the following: SIB1 mentioned above; system messages carrying ephemeris information, such as SIB19; or other system information (OSI).
[0008] The first information is used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, and can be replaced with any of the following: the first information can be used to indicate support for combined reception of the first PDSCH and the second PDSCH; the first information can be used to indicate support for determining the information carried in the first PDSCH, i.e., the first SIB, based on the first PDSCH and the second PDSCH; the first information can be used to indicate that the original bits carried by the first PDSCH are the same as the original bits carried by the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH; or, the first information can be used to indicate that the original bits carried by the first PDSCH are the same as the original bits carried by the second PDSCH.
[0009] The following provides examples of various methods for merging and receiving data. It should be understood that this application does not limit the scope of the application.
[0010] As one possible implementation, the signals of the first PDSCH and the second PDSCH can be combined first, and then the combined signal result can be demodulated to obtain the first SIB carried in the first PDSCH. This application does not limit the signal combining method; for example, it can be signal superposition or weighted superposition. Since the signal energy increases after signal combining, or in other words, the useful information in the signal increases, demodulating the combined signal result helps improve demodulation performance.
[0011] This scheme requires only one demodulation step to obtain the first SIB in the first PDSCH, which helps reduce processing complexity and latency caused by demodulation. It should be noted that the PDSCH signal mentioned here refers to the undemodulated signal. This scheme is suitable for scenarios where the information carried by the first PDSCH is the same as that carried by the second PDSCH, and the modulation and coding schemes of the first and second PDSCHs are the same.
[0012] As another possible implementation, the first PDSCH and the second PDSCH can be demodulated separately first, and then the demodulation results of the first PDSCH and the second PDSCH can be combined to obtain the first SIB carried in the first PDSCH. Due to factors such as the difference in signal-to-noise ratio during the transmission of the first PDSCH and the second PDSCH, the parts of the first PDSCH that cannot be successfully demodulated may be different from those of the second PDSCH. Therefore, by combining the demodulation results of the first PDSCH and the second PDSCH, it is helpful to obtain the first SIB carried in the first PDSCH, thereby helping to improve demodulation performance.
[0013] 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. 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 PDSCH and bits that cannot be successfully demodulated in the second PDSCH is small, which helps to improve the performance of merging and demodulation.
[0014] By merging the reception of the first PDSCH and the second PDSCH, it is possible to successfully demodulate the first PDSCH within one cycle, thereby improving the demodulation performance of the first PDSCH. Compared with related technologies, the scheme in this application embodiment does not require waiting for multiple cycles during the reception of the first PDSCH, thus helping to reduce access latency.
[0015] In this embodiment, on the one hand, by independently configuring whether the PDSCH of the SIBs carrying different SSBs associated with each other supports merged reception, it helps to match demodulation requirements and improve the flexibility of the system.
[0016] On the other hand, by independently configuring whether the PDSCH of SIBs carrying different SSBs support combined reception, it helps to balance the flexibility of regional SIBs and the enhancement of demodulation performance of cell-level SIBs.
[0017] On the other hand, by indicating whether the PDSCH of SIBs carrying different SSB associations supports merged reception through the first condition, the terminal device can be enabled to merged reception of PDSCHs carrying different SSB associations without additional indication information, which helps to save indication resources.
[0018] In some embodiments, the first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0019] Alternatively, a third value for the first field can be used to indicate that the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0020] For example, the first field can be 1 bit. Taking a first value of 1 as an example, if this 1 bit is 1, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, or in other words, combined reception of the first PDSCH and the second PDSCH is supported; if this 1 bit is 0, the information carried by the first PDSCH is different from the information carried by the second PDSCH, or in other words, combined reception of the first PDSCH and the second PDSCH is not supported. It should be understood that the first value of 1 is only given as an example, and this application does not limit it; for example, the first value can also be 0.
[0021] Alternatively, the value of the first field can be used to configure whether multiple PDSCHs (used to carry multiple SSBs associated with multiple SSBs in the cell) support combined reception. For example, the value of the first field can be used to configure whether all PDSCHs in the cell used to carry SIBs support combined reception.
[0022] For example, the first value of the first field can be used to indicate that multiple PDSCHs in the cell that carry SIBs support combined reception, or that different SSBs in the cell are associated with the same SIB, such as the cell-level SIB mentioned above.
[0023] Conversely, if the first field takes the third value, it can be used to indicate that multiple PDSCHs in the cell that carry SIBs do not support combined reception, or that different SSBs in the cell are associated with different SIBs, such as the SIB of the cell being the regional SIB mentioned above.
[0024] It should be understood that if multiple PDSCHs used to carry SIBs in a cell do not support combined reception, different SSBs in the cell may also be associated with the same SIB. For example, when different SSBs are associated with the same SIB, the configuration can be adjusted as needed to determine whether multiple PDSCHs used to carry SIBs support combined reception. For instance, in areas with poor link quality, such as cell edge areas, multiple PDSCHs used to carry SIBs can be configured to support combined reception. Conversely, in areas with good link quality, such as sub-satellite areas, multiple PDSCHs used to carry SIBs can be configured not to support combined reception. It can be seen that in sub-satellite areas, multiple PDSCHs used to carry SIBs do not support combined reception, but multiple SSBs in the sub-satellite area are associated with the same SIB.
[0025] This scheme only requires 1 bit to uniformly configure whether the PDSCH carrying the SIB supports merged reception within the cell, which helps to save indication resources.
[0026] In some embodiments, the first field is carried in the first SSB and / or the second SSB, or the first field is carried in an extended master information block.
[0027] For example, the first field may carry reserved bits in the first SSB and / or the second SSB. Alternatively, the first field may be a cell access prohibition field.
[0028] Since the first information a terminal device can obtain during the initial access process is the SSB, carrying the first field through the SSB helps the terminal device know whether the system supports merging and receiving system messages within a cycle before obtaining system messages, thereby helping to reduce access latency.
[0029] In some embodiments, the first information can be carried in a second field. The value of the second field in the first SSB is the same as the value of the second field in the second SSB, indicating that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; this scheme offers high flexibility. Conversely, the value of the second field in the first SSB is different from the value of the second field in the second SSB, indicating that the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0030] In some embodiments, the first information may be carried in a bit set, which may be a bitmap. For example, each bit in the bit set is associated with a corresponding SSB. Taking the first bit in the bit set as associated with the first SSB and the second bit in the bit set as associated with the second SSB as an example, the first bit and the second bit are given a fourth value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, which helps to improve the flexibility of configuration.
[0031] For example, the first piece of information can be carried in a bit set consisting of 8 bits. This bit set is associated with SSB0, SSB1, SSB2, ..., SSB7 sequentially from the most significant bit to the least significant bit. Taking SSB1 as the first SSB and SSB2 as the second SSB as an example, then the second bit from the most significant bit in the bit set is the first bit, and the third bit is the second bit.
[0032] Taking a fourth value of 1 as an example, the bit set could be 01100010, indicating that the information carried by the PDSCH of the SIBs associated with SSB1, SSB2, and SSB6 is the same. In this case, the first and second bits both take the fourth value, so the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0033] The bit set could also be 00001110, indicating that the PDSCHs of the SIBs associated with SSB4, SSB5, and SSB6 carry the same information. In this case, the values of the first and second bits are not the fourth value, so the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0034] The above description uses the fourth value as 1. It should be understood that the fourth value can also be 0, and this application does not limit this.
[0035] In some embodiments, a first PDCCH is used to schedule the first PDSCH, and a second PDCCH is used to schedule the second PDSCH; the first condition includes one of the following: the first PDSCH is detected at the position indicated by the first PDCCH, and the second PDSCH is detected at the position indicated by the second PDCCH; or the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
[0036] In related technologies, the position indicated by the PDCCH is the position of the PDSCH. However, in this embodiment, the position indicated by the first PDCCH is a candidate position of the first PDSCH, and the position indicated by the second PDCCH is a candidate position of the second PDSCH. Furthermore, based on the position indicated by the first PDCCH (i.e., a candidate position of the first PDSCH), another candidate position of the first PDSCH can be determined; similarly, based on the position indicated by the second PDCCH (i.e., a candidate position of the second PDSCH), another candidate position of the second PDSCH can be determined.
[0037] This scheme can determine whether the first PDSCH and the second PDSCH support combined reception based on the relationship between the monitored PDSCH location and the location indicated by the PDCCH, which helps to reduce resource overhead.
[0038] In some embodiments, the position indicated by the first PDCCH is a time-domain position, and the position indicated by the second PDCCH is a time-domain position; or, the position indicated by the first PDCCH is a frequency-domain position, and the position indicated by the second PDCCH is a frequency-domain position.
[0039] In other words, it can be determined whether the first PDSCH and the second PDSCH support combined reception based on the relationship between the time domain position of the monitored PDSCH and the time domain position indicated by the PDCCH, or based on the relationship between the frequency domain position of the monitored PDSCH and the frequency domain position indicated by the PDCCH.
[0040] Implicitly indicating whether the PDSCH supports combined reception via time-domain location is simple to implement; implicitly indicating whether the PDSCH supports combined reception via frequency-domain location helps reduce access latency.
[0041] In some embodiments, the second value is predefined, or the second value is carried in the first SSB (and / or the second SSB) or the first PDCCH (and / or the second PDCCH).
[0042] The second value can be predefined, such as those defined by the protocol, which helps reduce indication overhead. Alternatively, the second value can be carried in one or more of the first SSB, second SSB, first PDCCH, or second PDCCH, which helps improve flexibility. For example, the second value can be flexibly configured according to the available resource size.
[0043] For example, the second value can be a frequency domain value. For instance, the second value could be X subcarriers, X RBs, X MHz, etc. This application does not limit this.
[0044] For example, the second value can be a time-domain quantity. For instance, the second value could be X ms, X us, X time slots, X symbols, etc. This application does not limit this.
[0045] It should be understood that the second value can be positive or negative.
[0046] Taking the position indicated by the first PDCCH as time slot n0#SSB1 as an example, the position offset by a second value (i.e., X) relative to the position indicated by the first PDCCH can be time slot n0#SSB1+X, where X can be a positive or negative value. Alternatively, the position offset by a second value (denoted as X) relative to the position indicated by the first PDCCH can be time slot n0#SSB1-X.
[0047] Taking the position indicated by the first PDCCH as the first frequency domain position (denoted as K#SSB1) as an example, the position offset by a second value (denoted as X) relative to the position indicated by the first PDCCH can be K#SSB1+X, where X can be a positive or negative value. Alternatively, the position offset by a second value (denoted as X) relative to the position indicated by the first PDCCH can be K#SSB1-X.
[0048] In some embodiments, the first condition may include: detecting a first PDCCH at a location indicated by a first SSB, and detecting a second PDCCH at a location indicated by a second SSB.
[0049] Accordingly, when the first PDSCH is detected at a position offset by a fifth value relative to the position indicated by the first SSB, and when the second PDSCH is detected at a position offset by a fifth value relative to the position indicated by the second SSB, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0050] In related technologies, the location indicated by the SSB is the monitoring location of the PDCCH. However, in this embodiment, the location indicated by the first SSB is a candidate location of the first PDCCH, and the location indicated by the second SSB is a candidate location of the second PDCCH. Furthermore, based on the location indicated by the first SSB (i.e., a candidate location of the first PDCCH), another candidate location of the first PDCCH can be determined; similarly, based on the location indicated by the second SSB (i.e., a candidate location of the second PDCCH), another candidate location of the second PDCCH can be determined.
[0051] This method implicitly indicates, based on the location of the PDCCH, whether the information carried by the first PDSCH is the same as that carried by the second PDSCH, which helps to save indication resources.
[0052] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource; the first condition includes one of the following: the first PDSCH is detected on the first 1 / N bandwidth of the frequency domain resource, and the second PDSCH is detected on the first 1 / N bandwidth of the frequency domain resource; or the first PDSCH is detected on the last (N-1) / N bandwidth of the frequency domain resource in the first frequency domain resource, and the second PDSCH is detected on the last (N-1) / N bandwidth of the frequency domain resource in the second frequency domain resource; wherein, N is a positive integer.
[0053] For example, N is 2. That is, the first condition may include: a first PDSCH is detected on the first half bandwidth of the first frequency domain resources, and a second PDSCH is detected on the first half bandwidth of the second frequency domain resources; or, a first PDSCH is detected on the latter half bandwidth of the first frequency domain resources, and a second PDSCH is detected on the latter half bandwidth of the second frequency domain resources. In this way, resource utilization can be maximized while ensuring the transmission of both the first and second PDSCHs.
[0054] In some embodiments, N is predefined for ease of implementation. Alternatively, N may be carried on the first SSB or the first PDCCH, and N can be flexibly configured according to usage requirements.
[0055] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource. The first condition may include detecting the first PDSCH on the first frequency domain resource with a bandwidth of N / M, and detecting the second PDSCH on the second frequency domain resource with a bandwidth of N / M; or, the first condition may include detecting the first PDSCH on the first frequency domain resource with a bandwidth of (MN) / M, and detecting the second PDSCH on the second frequency domain resource with a bandwidth of (MN) / M. Where M and N are both positive integers.
[0056] This approach helps improve system flexibility. For example, since regional-level system messages are configured separately, the information carried in them differs from that carried in cell-level system messages. Therefore, the transmission resource requirements for regional-level and cell-level system messages may differ. Based on this, M and / or N can be determined according to the resource requirements for transmitting regional-level and cell-level system messages.
[0057] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB (and / or the second SSB) or the first PDCCH (and / or the second PDCCH).
[0058] For example, both M and N can be predefined. Alternatively, M can be predefined, while N can be flexibly configured, thus balancing flexibility and implementation complexity. Or, both M and N can be flexibly configured, resulting in a highly flexible system.
[0059] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0060] In other words, the first SIB and the second SIB are the same, such as the first SIB and the second SIB being cell-level SIBs.
[0061] Furthermore, the modulation and coding scheme of the first PDSCH is the same as that of the second PDSCH, which supports demodulation of the combined signal of the first PDSCH and the second PDSCH. 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.
[0062] 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 logical node, logical module, or software capable of implementing all or part of the communication device functions. In this method: first information is sent, indicating that the information carried by a first physical downlink shared channel (PDSCH) is the same as the information carried by a second PDSCH; or, under a first condition, it is determined that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, the first condition being related to the position of the first PDSCH and / or the position of the second PDSCH; wherein the System Message Block (SIB) carried by the first PDSCH is associated with a first synchronization signal block (SSB), and the SIB carried by the second PDSCH is associated with a second SSB.
[0063] 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.
[0064] The first information is used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, and can be replaced with any of the following: the first information can be used to indicate support for combined reception of the first PDSCH and the second PDSCH; the first information can be used to indicate support for determining the information carried in the first PDSCH, i.e., the first SIB, based on the first PDSCH and the second PDSCH; the first information can be used to indicate that the original bits carried by the first PDSCH are the same as the original bits carried by the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH; or, the first information can be used to indicate that the original bits carried by the first PDSCH are the same as the original bits carried by the second PDSCH.
[0065] For details on the merged receiving method, please refer to the previous text. It will not be repeated here.
[0066] By merging the reception of the first PDSCH and the second PDSCH, it is possible to successfully demodulate the first PDSCH within one cycle, thereby improving the demodulation performance of the first PDSCH. Compared with related technologies, the scheme in this application embodiment does not require waiting for multiple cycles during the reception of the first PDSCH, thus helping to reduce access latency.
[0067] In this embodiment, on the one hand, by independently configuring whether the PDSCH of the SIBs carrying different SSBs associated with each other supports merged reception, it helps to match demodulation requirements and improve the flexibility of the system.
[0068] On the other hand, by independently configuring whether the PDSCH of SIBs carrying different SSBs support combined reception, it helps to balance the flexibility of regional SIBs and the enhancement of demodulation performance of cell-level SIBs.
[0069] On the other hand, by indicating whether the PDSCH of SIBs carrying different SSB associations supports merged reception through the first condition, the terminal device can be enabled to merged reception of PDSCHs carrying different SSB associations without additional indication information, which helps to save indication resources.
[0070] In some embodiments, the first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0071] Alternatively, a third value for the first field can be used to indicate that the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0072] For example, the first field can be 1 bit. Taking a first value of 1 as an example, if this 1 bit is 1, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, or in other words, combined reception of the first PDSCH and the second PDSCH is supported; if this 1 bit is 0, the information carried by the first PDSCH is different from the information carried by the second PDSCH, or in other words, combined reception of the first PDSCH and the second PDSCH is not supported. It should be understood that the first value of 1 is only given as an example, and this application does not limit it; for example, the first value can also be 0.
[0073] In some embodiments, the first field is carried in the first SSB and / or the second SSB, or the first field is carried in an extended master information block.
[0074] For example, the first field may be a reserved bit in the first SSB and / or the second SSB. Alternatively, the first field may be a cell access prohibition field.
[0075] Since the first information a terminal device can obtain during the initial access process is the SSB, carrying the first field through the SSB helps the terminal device know whether the system supports merging and receiving system messages within a cycle before obtaining system messages, thereby helping to reduce access latency.
[0076] In some embodiments, the first information can be carried in a second field. The value of the second field in the first SSB is the same as the value of the second field in the second SSB, indicating that the information carried by the first PDSCH is the same as the information carried by the second PDSCH; this scheme offers high flexibility. Conversely, the value of the second field in the first SSB is different from the value of the second field in the second SSB, indicating that the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0077] In some embodiments, the first information may be carried in a bit set, which may be a bitmap. For example, each bit in the bit set is associated with a corresponding SSB. Taking the first bit in the bit set as associated with the first SSB and the second bit in the bit set as associated with the second SSB as an example, the first bit and the second bit are given a fourth value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, which helps to improve the flexibility of configuration.
[0078] For example, the first piece of information can be carried in a bit set consisting of 8 bits. This bit set is associated with SSB0, SSB1, SSB2, ..., SSB7 sequentially from the most significant bit to the least significant bit. Taking SSB1 as the first SSB and SSB2 as the second SSB as an example, then the second bit from the most significant bit in the bit set is the first bit, and the third bit is the second bit.
[0079] Taking a fourth value of 1 as an example, the bit set could be 01100010, indicating that the information carried by the PDSCH of the SIBs associated with SSB1, SSB2, and SSB6 is the same. In this case, the first and second bits both take the fourth value, so the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0080] The bit set could also be 00001110, indicating that the PDSCHs of the SIBs associated with SSB4, SSB5, and SSB6 carry the same information. In this case, the values of the first and second bits are not the fourth value, so the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0081] The above description uses the fourth value as 1. It should be understood that the fourth value can also be 0, and this application does not limit this.
[0082] In some embodiments, a first PDCCH is used to schedule the first PDSCH, and a second PDCCH is used to schedule the second PDSCH; the first condition includes one of the following: the first PDSCH is detected at the position indicated by the first PDCCH, and the second PDSCH is detected at the position indicated by the second PDCCH; or the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
[0083] In related technologies, the position indicated by the PDCCH is the position of the PDSCH. However, in this embodiment, the position indicated by the first PDCCH is a candidate position of the first PDSCH, and the position indicated by the second PDCCH is a candidate position of the second PDSCH. Furthermore, based on the position indicated by the first PDCCH (i.e., a candidate position of the first PDSCH), another candidate position of the first PDSCH can be determined; similarly, based on the position indicated by the second PDCCH (i.e., a candidate position of the second PDSCH), another candidate position of the second PDSCH can be determined.
[0084] This scheme can determine whether the first PDSCH and the second PDSCH support combined reception based on the relationship between the monitored PDSCH location and the location indicated by the PDCCH, which helps to reduce resource overhead.
[0085] In some embodiments, the position indicated by the first PDCCH is a time-domain position, and the position indicated by the second PDCCH is a time-domain position; or, the position indicated by the first PDCCH is a frequency-domain position, and the position indicated by the second PDCCH is a frequency-domain position.
[0086] In other words, it can be determined whether the first PDSCH and the second PDSCH support combined reception based on the relationship between the time domain position of the monitored PDSCH and the time domain position indicated by the PDCCH, or based on the relationship between the frequency domain position of the monitored PDSCH and the frequency domain position indicated by the PDCCH.
[0087] Implicitly indicating whether the PDSCH supports combined reception via time-domain location is simple to implement; implicitly indicating whether the PDSCH supports combined reception via frequency-domain location helps reduce access latency.
[0088] In some embodiments, the second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
[0089] The second value can be predefined, such as those defined by the protocol, which helps reduce indication overhead. Alternatively, the second value can be carried in the first SSB or the first PDCCH, which helps improve flexibility. For example, the second value can be flexibly configured according to the available resource size.
[0090] For example, the second value can be a frequency domain value. For instance, the second value could be X subcarriers, X RBs, X MHz, etc. This application does not limit this.
[0091] For example, the second value can be a time-domain quantity. For instance, the second value could be X ms, X us, X time slots, X symbols, etc. This application does not limit this.
[0092] It should be understood that the second value can be positive or negative.
[0093] Taking the position indicated by the first PDCCH as time slot n0#SSB1 as an example, the position offset by a second value (i.e., X) relative to the position indicated by the first PDCCH can be time slot n0#SSB1+X, where X can be a positive or negative value. Alternatively, the position offset by a second value (denoted as X) relative to the position indicated by the first PDCCH can be time slot n0#SSB1-X.
[0094] Taking the position indicated by the first PDCCH as the first frequency domain position (denoted as K#SSB1) as an example, the position offset by a second value (denoted as X) relative to the position indicated by the first PDCCH can be K#SSB1+X, where X can be a positive or negative value. Alternatively, the position offset by a second value (denoted as X) relative to the position indicated by the first PDCCH can be K#SSB1-X.
[0095] In some embodiments, the first condition may include: detecting a first PDCCH at a location indicated by a first SSB, and detecting a second PDCCH at a location indicated by a second SSB.
[0096] Accordingly, when the first PDSCH is detected at a position offset by a fifth value relative to the position indicated by the first SSB, and when the second PDSCH is detected at a position offset by a fifth value relative to the position indicated by the second SSB, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0097] In related technologies, the location indicated by the SSB is the monitoring location of the PDCCH. However, in the embodiments of this application, the location indicated by the first SSB is a candidate location of the first PDCCH, and the location indicated by the second SSB is a candidate location of the second PDCCH.
[0098] In addition, another candidate position of the first PDCCH can be determined based on the position indicated by the first SSB (i.e., a candidate position of the first PDCCH); another candidate position of the second PDCCH can be determined based on the position indicated by the second SSB (i.e., a candidate position of the second PDCCH).
[0099] This method implicitly indicates, based on the location of the PDCCH, whether the information carried by the first PDSCH is the same as that carried by the second PDSCH, which helps to save indication resources.
[0100] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource; the first condition includes one of the following: the first PDSCH is detected on the first 1 / N bandwidth of the frequency domain resource, and the second PDSCH is detected on the first 1 / N bandwidth of the frequency domain resource; or the first PDSCH is detected on the last (N-1) / N bandwidth of the frequency domain resource in the first frequency domain resource, and the second PDSCH is detected on the last (N-1) / N bandwidth of the frequency domain resource in the second frequency domain resource; wherein, N is a positive integer.
[0101] For example, N is 2. That is, the first condition may include: a first PDSCH is detected on the first half bandwidth of the first frequency domain resources, and a second PDSCH is detected on the first half bandwidth of the second frequency domain resources; or, a first PDSCH is detected on the latter half bandwidth of the first frequency domain resources, and a second PDSCH is detected on the latter half bandwidth of the second frequency domain resources. In this way, resource utilization can be maximized while ensuring the transmission of both the first and second PDSCHs.
[0102] In some embodiments, N is predefined for ease of implementation. Alternatively, N may be carried on the first SSB or the first PDCCH, and N can be flexibly configured according to usage requirements.
[0103] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource. The first condition may include: the first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or, the first condition may include: the first PDSCH is detected on the first frequency domain resource with a bandwidth of (MN) / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of (MN) / M. Wherein, M and N are both positive integers.
[0104] This approach helps improve system flexibility. For example, since regional-level system messages are configured separately, the information carried in them differs from that carried in cell-level system messages. Therefore, the transmission resource requirements for regional-level and cell-level system messages may differ. Based on this, M and / or N can be determined according to the resource requirements for transmitting regional-level and cell-level system messages.
[0105] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB (and / or the second SSB) or the first PDCCH (and / or the second PDCCH).
[0106] For example, both M and N can be predefined. Alternatively, M can be predefined, while N can be flexibly configured, thus balancing flexibility and implementation complexity. Or, both M and N can be flexibly configured, resulting in a highly flexible system.
[0107] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0108] In other words, the first SIB and the second SIB are the same, such as the first SIB and the second SIB being cell-level SIBs.
[0109] Furthermore, the modulation and coding scheme of the first PDSCH is the same as that of the second PDSCH, which supports demodulation of the combined signal of the first PDSCH and the second PDSCH. 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.
[0110] Thirdly, embodiments of this application provide a communication device, comprising: a receiving unit, configured to receive first information, the first information being configured to indicate that information carried by a first physical downlink shared channel (PDSCH) is the same as information carried by a second PDSCH; or, under a first condition, to determine that information carried by the first PDSCH is the same as information carried by the second PDSCH, the first condition being related to the position of the first PDSCH and / or the position of the second PDSCH; wherein, a system message block (SIB) carried by the first PDSCH is associated with a first synchronization signal block (SSB), and an SIB carried by the second PDSCH is associated with a second SSB; and a determining unit, configured to determine the SIB carried by the first PDSCH based on the first PDSCH and the second PDSCH.
[0111] 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 in the terminal 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.
[0112] In some embodiments, the first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0113] In some embodiments, the first field is carried in the first SSB and / or the second SSB, or the first field is carried in an extended master information block.
[0114] In some embodiments, a first PDCCH is used to schedule the first PDSCH, and a second PDCCH is used to schedule the second PDSCH; the first condition includes one of the following: the first PDSCH is detected at the position indicated by the first PDCCH, and the second PDSCH is detected at the position indicated by the second PDCCH; or the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
[0115] In some embodiments, the position indicated by the first PDCCH is a time-domain position, and the position indicated by the second PDCCH is a time-domain position; or, the position indicated by the first PDCCH is a frequency-domain position, and the position indicated by the second PDCCH is a frequency-domain position.
[0116] In some embodiments, the second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
[0117] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource; the first condition includes one of the following: the first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or, the first PDSCH is detected on the first frequency domain resource with a bandwidth of (MN) / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of (MN) / M. Wherein, M and N are both positive integers.
[0118] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB (and / or the second SSB) or the first PDCCH (and / or the second PDCCH).
[0119] In some embodiments, N is predefined, or N is carried in the first SSB or the first PDCCH.
[0120] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0121] Fourthly, embodiments of this application provide a communication device, which includes: a transmitting unit, configured to transmit first information, the first information being configured to indicate that information carried by a first physical downlink shared channel (PDSCH) is the same as information carried by a second PDSCH; or, under a first condition, determining that information carried by the first PDSCH is the same as information carried by the second PDSCH, the first condition being related to the position of the first PDSCH and / or the position of the second PDSCH; wherein, the system message block (SIB) carried by the first PDSCH is associated with a first synchronization signal block (SSB), and the SIB carried by the second PDSCH is associated with a second SSB.
[0122] 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.
[0123] In some embodiments, the first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0124] In some embodiments, the first field is carried in the first SSB and / or the second SSB, or the first field is carried in an extended master information block.
[0125] In some embodiments, a first PDCCH is used to schedule the first PDSCH, and a second PDCCH is used to schedule the second PDSCH; the first condition includes one of the following: the first PDSCH is detected at the position indicated by the first PDCCH, and the second PDSCH is detected at the position indicated by the second PDCCH; or the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
[0126] In some embodiments, the position indicated by the first PDCCH is a time-domain position, and the position indicated by the second PDCCH is a time-domain position; or, the position indicated by the first PDCCH is a frequency-domain position, and the position indicated by the second PDCCH is a frequency-domain position.
[0127] In some embodiments, the second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
[0128] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource; the first condition includes one of the following: the first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or, the first PDSCH is detected on the first frequency domain resource with a bandwidth of (MN) / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of (MN) / M. Wherein, M and N are both positive integers.
[0129] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB or the first PDCCH.
[0130] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0131] 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.
[0132] 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.
[0133] In one possible design, the communication device may also include the memory.
[0134] 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.
[0135] 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.
[0136] 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.
[0137] In one possible design, the communication device may also include the memory.
[0138] 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.
[0139] 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.
[0140] 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.
[0141] 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.
[0142] 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
[0143] Figure 1 is a schematic diagram of the architecture of the communication system used in the embodiments of this application;
[0144] Figure 2A is a schematic diagram of the NTN architecture including transparent transmission mode satellites;
[0145] Figure 2B is a schematic diagram of an NTN architecture that includes regenerable mode satellites;
[0146] Figure 2C is a schematic diagram of another NTN architecture that includes regenerable mode satellites;
[0147] Figure 3 is a schematic diagram of satellite coverage;
[0148] Figure 4 shows an example of satellite downlink coverage performance;
[0149] Figure 5 is a flowchart illustrating a communication method provided in an embodiment of this application;
[0150] Figure 6 is a flowchart illustrating another communication method provided in an embodiment of this application;
[0151] Figure 7 is a flowchart illustrating another communication method provided in an embodiment of this application;
[0152] Figure 8 is a flowchart illustrating another communication method provided in an embodiment of this application;
[0153] Figure 9 is a flowchart illustrating another communication method provided in an embodiment of this application;
[0154] Figure 10 is a schematic diagram of the temporal candidate positions of the first PDSCH provided in an embodiment of this application;
[0155] Figure 11 is a schematic diagram of the temporal candidate positions of the second PDSCH provided in an embodiment of this application;
[0156] Figure 12 is a schematic diagram of the frequency domain candidate positions of the first PDSCH provided in an embodiment of this application;
[0157] Figure 13 is a schematic diagram of the frequency domain candidate positions of the second PDSCH provided in an embodiment of this application;
[0158] Figure 14 is an exemplary block diagram of a communication device provided in an embodiment of this application;
[0159] Figure 15 is another exemplary block diagram of the communication device provided in an embodiment of this application;
[0160] Figure 16 is another exemplary block diagram of the communication device provided in the embodiments of this application. Detailed Implementation
[0161] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0162] 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.
[0163] 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.
[0164] 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.
[0165] 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.
[0166] 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.
[0167] 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.
[0168] 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.
[0169] 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.
[0170] 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.
[0171] 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).
[0172] 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).
[0173] 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.
[0174] 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.
[0175] 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.
[0176] 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.
[0177] 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.
[0178] 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.
[0179] 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.
[0180] The following describes another communication system (NTN) to which the embodiments of this application are applicable.
[0181] 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.
[0182] 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.
[0183] 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.
[0184] 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.
[0185] 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.
[0186] 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.
[0187] 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.
[0188] 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. Compared to terrestrial communication systems, a single satellite offers wider coverage and longer transmission distances; providing services to terminal devices through extensive coverage is a significant characteristic of satellite communication systems.
[0189] 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.
[0190] 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.
[0191] 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.
[0192] SIB1 can be carried in the PDSCH, and the PDSCH carrying SIB1 can be scheduled by the physical downlink control channel (PDCCH). The downlink control information (DCI) carried in the PDCCH can be used to indicate the time-domain resources, frequency-domain resources, and modulation and coding scheme of the PDSCH carrying SIB1.
[0193] 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 within that 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.
[0194] 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.
[0195] 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.
[0196] 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.
[0197] It should be noted that ground communication systems do not need to obtain ephemeris information.
[0198] 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.
[0199] Figure 4 shows an example of satellite downlink coverage performance. Referring to Figure 4, the satellite's total downlink power is 200W, its coverage radius is 850km, its antenna gain is 30dBi, its orbital altitude is 600km, its beamwidth radius is 25km, and its total number of beams 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 4 as an example, the performance difference between the downlink beam and the edge beam can reach a 5dB gap, indicating poor edge performance. Therefore, demodulation of the SIB (Side In-Band) is difficult in cell edge areas, thus affecting the initial access process.
[0200] As one possible implementation, if SIB fails to demodulate, the terminal device can receive the next SIB in the next cycle 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 SIB1 in the next cycle 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.
[0201] To address the aforementioned issues, this application provides a communication method that enables the combined reception of SIBs associated with different SSBs. Based on this, even with poor demodulation performance, the method allows for the combined reception of SIBs associated with different SSBs within a single cycle, thus improving SIB demodulation performance. Compared to related technologies that acquire SIBs over multiple cycles, this method facilitates successful SIB reception within a single cycle, thereby reducing access latency.
[0202] As described in the initial access process above, SIB reception includes receiving the PDCCH used to schedule the PDSCH of the SIB and receiving the PDSCH of the SIB itself. Therefore, configuring SIBs associated with different SSBs to support merged reception means that both the PDSCH of the SIB and the PDCCH used to schedule the SIB support merged reception. In other words, whether the PDCCH used to schedule the SIB supports merged reception and whether the PDSCH of the SIB itself supports merged reception are configured uniformly.
[0203] For example, multiple channels supporting combined reception can mean that: multiple channels carry the same information; or, multiple channels carry the same information and have the same modulation and coding scheme. It should be understood that multiple PDSCHs carrying multiple SIBs supporting combined reception means that the multiple PDSCHs carry the same information, i.e., the multiple SIBs are the same.
[0204] The method described above will be explained in detail below with reference to Figure 5. The method shown in Figure 5 may include steps 1 to 3.
[0205] Step 1: The network device sends multiple different SSBs.
[0206] Multiple SSBs can indicate whether their associated SIB1 / SIB19 supports combined reception. Alternatively, multiple SSBs can indicate whether SIB1 / SIB19 are the same, and whether the PDCCH information used to schedule the PDSCH carrying SIB1 / SIB19 is the same.
[0207] Step 2: The terminal device determines the candidate SSB index set, and determines whether the associated SIB1 / SIB19 supports merged reception based on the multiple candidate SSBs.
[0208] The terminal device performs downlink timing synchronization based on the received SSB.
[0209] The terminal device can determine the candidate SSB index set based on the received signal. The candidate SSB index set includes the indices of the SSBs that the terminal device can receive. Referring to Figure 3, the terminal device determines SSB 0, SSB 1, and SSB 2 as receivable SSBs based on energy detection, so the candidate SSB index set is {0,1,2}.
[0210] The terminal device can determine whether the SIB1 / SIB19 associated with the multiple candidate SSBs supports combined reception based on the bit values carried in SSB#0, SSB#1, and SSB#2.
[0211] Step 3: The terminal device receives SIB1 / SIB19 associated with multiple SSBs sent by the network device.
[0212] The terminal device can determine multiple SIB1 search spaces {n0} and multiple SIB19 / SIB1-bis search spaces {n1} corresponding to the candidate SSB based on the candidate SSB index set.
[0213] When multiple candidate SSBs are associated with SIBs that support combined reception, the terminal device monitors the PDCCH used to schedule the PDSCH carrying the SIB in the search space of multiple SIB1 / SIB19, and jointly receives multiple PDCCHs used to schedule the PDSCH carrying the SIB in a single cycle, thereby helping to improve the demodulation performance of the PDCCH.
[0214] Taking candidate SSBs including SSB 0, SSB 1, and SSB 2 as an example, optionally, the terminal device can monitor the PDCCH used to schedule the PDSCH carrying that SSB in the search space of the SIB associated with SSB 1. If the PDCCH cannot be demodulated successfully, the terminal device can receive the PDCCH in the search space of the SIB associated with SSB 0 or SSB 2, and merge the two received PDCCHs for demodulation, thereby helping to improve the demodulation performance of the PDCCH.
[0215] Based on the demodulation results of the PDCCH, the DCI it carries can be determined. Based on the DCI, the time-frequency resource location and modulation method of the PDSCH carrying SIB1 / SIB19 that it schedules can be determined.
[0216] When multiple candidate SSB-associated SIBs support combined reception, PDSCHs carrying SIBs with different SSB associations can be received in a combined manner to improve PDSCH demodulation performance. In this scenario, the time-frequency resources of the PDSCHs carrying SIBs with different SSB associations need to be known. Therefore, this scheme needs to receive and demodulate multiple PDCCHs to obtain multiple DCIs, which are used to schedule the PDSCHs carrying SIBs with different SSB associations.
[0217] The method provided in this application embodiment enables terminal devices to combine and receive SIBs associated with different SSBs within a period, which helps to improve the demodulation performance of the PDSCH carrying the SIB and the demodulation performance of the PDCCH used to schedule the PDSCH carrying the SIB, thereby helping to improve the downlink coverage performance of the system and reduce the access latency of the terminal device.
[0218] Typically, the demodulation thresholds for PDCCH and PDSCH are different; for example, the demodulation threshold for PDSCH is higher than that for PDCCH. If the configuration for whether multiple SSBs associated with each other support combined reception is uniformly configured—that is, if the configuration for whether PDCCH and PDSCH support combined reception is bound together—the flexibility is poor and it cannot match demodulation requirements.
[0219] In addition, the information carried by SIBs within a cell may be the same or different.
[0220] In some embodiments, SIBs within a cell carry the same information, such as the same raw bits in the PDSCH carrying the SIB. This type of SIB can be called a cell-level SIB.
[0221] In other embodiments, the information carried by SIBs in different areas within a cell differs; for example, SIBs associated with different SSBs carry different information. In other words, supporting the configuration of SIB messages separately for different areas helps improve flexibility. This type of SIB can be called a region-level SIB or a beam-level SIB.
[0222] For example, when an SIB carries a PRACH resource, different SIBs may be associated with different PRACH resources, and thus different SIBs carry different information.
[0223] For example, the information carried by the SIB configured in the sub-satellite area and the SIB configured in the cell edge area may be different. Referring again to Figure 3, the information carried by the SIB associated with SSB 4 covering the sub-satellite area and the SIB associated with SSB N-1 covering the cell edge may be different.
[0224] To address one or more of the aforementioned problems, embodiments of this application provide another communication method. By independently configuring whether the PDSCH of SIBs carrying different SSB associations supports merged reception, it helps to match demodulation requirements and improve system flexibility. Furthermore, independently configuring whether the PDSCH of SIBs carrying different SSB associations supports merged reception helps to balance the flexibility of area-level SIBs with the enhanced demodulation performance of cell-level SIBs.
[0225] In some embodiments, the PDSCH carrying SIBs associated with different SSBs can be configured to support merged reception in an explicit manner to facilitate implementation.
[0226] In other embodiments, the PDSCHs carrying SIBs with different SSB associations can be implicitly configured to support merged reception, thus saving indication resources. For example, the location of the PDSCHs carrying SIBs with different SSB associations implicitly indicates whether they support merged reception.
[0227] It should be noted that in this embodiment of the application, multiple PDSCHs support merged reception, meaning that multiple PDSCHs carry the same information. Taking the first PDSCH and the second PDSCH as an example, the first SIB carried by the first PDSCH is associated with the first SSB, and the second SIB carried by the second PDSCH is associated with the second SSB.
[0228] Therefore, the support for combined reception of the first PDSCH and the second PDSCH can be replaced by: the information carried by the first PDSCH is the same as the information carried by the second PDSCH. Alternatively, the support for combined reception of the first PDSCH and the second PDSCH can be replaced by: the first SIB and the second SIB are the same.
[0229] The two methods described above will be explained in detail below with reference to Figures 6 and 7. It should be understood that both the methods shown in Figure 6 and Figure 7 can involve the interaction between terminal devices and network devices.
[0230] For example, the method shown in Figure 6 / Figure 7 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.
[0231] For example, the method shown in Figure 6 / Figure 7 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.
[0232] 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.
[0233] Figure 6 is a flowchart illustrating another communication method provided in an embodiment of this application. In some embodiments, the method shown in Figure 6 can be applied to terrestrial communication scenarios. In other embodiments, the method shown in Figure 6 can be applied to NTN communication scenarios.
[0234] The method shown in Figure 6 may include steps S610 and S620.
[0235] S610: The terminal device receives the first information, and the network device accordingly sends the first information.
[0236] The aforementioned first information is used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. Specifically, the first SIB of the first PDSCH is associated with the first SSB, and the second SIB of the second PDSCH is associated with the second SSB.
[0237] The first SSB and the second SSB can be SSBs that the terminal device can receive, such as the candidate SSBs mentioned above.
[0238] The first SIB and the second SIB can be SIB1 mentioned above; system messages carrying ephemeris information, such as SIB19; or at least one of other system information (OSI). It should be understood that the first SIB and the second SIB can also be system messages of a cell in a future communication system.
[0239] In some embodiments, the first information is used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, and can be replaced by any of the following: the first information can be used to indicate support for combined reception of the first PDSCH and the second PDSCH; the first information can be used to indicate support for determining the information carried in the first PDSCH, i.e., the first SIB, based on the first PDSCH and the second PDSCH; the first information can be used to indicate that the original bits carried by the first PDSCH are the same as the original bits carried by the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH; or, the first information can be used to indicate that the original bits carried by the first PDSCH are the same as the original bits carried by the second PDSCH.
[0240] The meaning of merged reception can be found in the following text, and will not be repeated here for the sake of brevity.
[0241] The fact that the original bits carried by the first PDSCH are the same as those carried by the second PDSCH can mean that the first SIB and the second SIB are the same. 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 PDSCH are the same as those carried by the second PDSCH can mean that the first SIB and the second SIB are the same, and that the redundant data in the first PDSCH and the redundant data in the second PDSCH are also the same; or it can mean that the first SIB and the second SIB are the same, but the redundant data in the first PDSCH and the redundant data in the second PDSCH are different.
[0242] S620, based on the first PDSCH and the second PDSCH, determine the SIB carried by the first PDSCH, i.e. the first SIB.
[0243] Determining the information carried in the first PDSCH based on the first PDSCH and the second PDSCH can be understood as merging and receiving the first PDSCH and the second PDSCH, and determining the first SIB based on the reception results of the first PDSCH and the second PDSCH. Merged reception can also be replaced by joint reception, merged demodulation, or joint demodulation.
[0244] The following provides examples of various methods for merging and receiving data. It should be understood that this application does not limit the scope of the application.
[0245] As one possible implementation, the signals of the first PDSCH and the second PDSCH can be merged first, and then the merged signal result can be demodulated to obtain the first SIB carried in the first PDSCH.
[0246] This application does not limit the signal combining method; for example, it can be signal superposition or weighted superposition. Since the signal energy increases after signal combining, or in other words, the useful information in the signal increases, demodulating the signal combining result helps to improve demodulation performance.
[0247] This scheme requires only one demodulation step to obtain the first SIB in the first PDSCH, which helps reduce processing complexity and latency caused by demodulation. It should be noted that the PDSCH signal mentioned here refers to the undemodulated signal. This scheme is suitable for scenarios where the information carried by the first PDSCH is the same as that carried by the second PDSCH, and the modulation and coding schemes of the first and second PDSCHs are the same.
[0248] As another possible implementation, the first PDSCH and the second PDSCH can be demodulated separately first, and then the demodulation results of the first PDSCH and the second PDSCH can be combined to obtain the first SIB carried in the first PDSCH. Due to factors such as the difference in signal-to-noise ratio during the transmission of the first PDSCH and the second PDSCH, the parts of the first PDSCH that cannot be successfully demodulated may be different from those of the second PDSCH. Therefore, by combining the demodulation results of the first PDSCH and the second PDSCH, it is helpful to obtain the first SIB carried in the first PDSCH, thereby helping to improve demodulation performance.
[0249] 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. 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 PDSCH and bits that cannot be successfully demodulated in the second PDSCH is small, which helps to improve the performance of merging and demodulation.
[0250] By merging the reception of the first PDSCH and the second PDSCH, it is possible to successfully demodulate the first PDSCH within one cycle, thereby improving the demodulation performance of the first PDSCH. Compared with related technologies, the scheme in this application embodiment does not require waiting for multiple cycles during the reception of the first PDSCH, thus helping to reduce access latency.
[0251] In this embodiment, independently configuring whether the PDSCH of SIBs carrying different SSB associations supports combined reception helps match demodulation requirements and improves system flexibility. Furthermore, independently configuring whether the PDSCH of SIBs carrying different SSB associations supports combined reception helps balance the flexibility of area-level SIBs and the enhancement of demodulation performance of cell-level SIBs.
[0252] There are multiple ways to implement the first information.
[0253] In some embodiments, the first information may be carried in a first field. A first value in the first field can be used to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. Alternatively, a third value in the first field can be used to indicate that the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0254] For example, the first field can be 1 bit. Taking a first value of 1 as an example, when the 1 bit is 1, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, or in other words, the combined reception of the first PDSCH and the second PDSCH is supported; when the 1 bit is 0, the information carried by the first PDSCH is different from the information carried by the second PDSCH, or in other words, the combined reception of the first PDSCH and the second PDSCH is not supported.
[0255] It should be understood that the first value of 1 is given only as an example, and this application does not limit it. For example, the first value can also be 0.
[0256] Alternatively, the value of the first field can be used to configure whether multiple PDSCHs (used to carry multiple SSBs associated with multiple SSBs in the cell) support combined reception. For example, the value of the first field can be used to configure whether all PDSCHs in the cell used to carry SIBs support combined reception.
[0257] For example, the first value of the first field can be used to indicate that multiple PDSCHs in the cell that carry SIBs support combined reception, or that different SSBs in the cell are associated with the same SIB, such as the cell-level SIB mentioned above.
[0258] Conversely, if the first field takes the third value, it can be used to indicate that multiple PDSCHs in the cell that carry SIBs do not support combined reception, or that different SSBs in the cell are associated with different SIBs, such as the SIB of the cell being the regional SIB mentioned above.
[0259] It should be understood that if multiple PDSCHs used to carry SIBs in a cell do not support combined reception, different SSBs in the cell may also be associated with the same SIB. For example, when different SSBs are associated with the same SIB, the configuration can be adjusted as needed to determine whether multiple PDSCHs used to carry SIBs support combined reception. For instance, in areas with poor link quality, such as cell edge areas, multiple PDSCHs used to carry SIBs can be configured to support combined reception. Conversely, in areas with good link quality, such as sub-satellite areas, multiple PDSCHs used to carry SIBs can be configured not to support combined reception. It can be seen that in sub-satellite areas, multiple PDSCHs used to carry SIBs do not support combined reception, but multiple SSBs in the sub-satellite area are associated with the same SIB.
[0260] This scheme only requires 1 bit to uniformly configure whether the PDSCH carrying the SIB supports merged reception within the cell, which helps to save indication resources.
[0261] In some embodiments, the first field is carried in the first SSB and / or the second SSB. For example, the first field is carried in reserved bits in the first SSB and / or the second SSB, or the first field is a cell access prohibition field.
[0262] Alternatively, the first field can be a bit newly added in the first SSB and / or the second SSB, such as the first field being carried in the extended master information block.
[0263] Since the first information a terminal device can obtain during the initial access process is the SSB, carrying the first field through the SSB helps the terminal device know whether the system supports merging and receiving system messages within a cycle before obtaining system messages, thereby helping to reduce access latency.
[0264] When the terminal device is located at the cell edge, the first SSB and the second SSB that the terminal device can receive may belong to adjacent cells. The terminal device can determine whether the first SSB and the second SSB belong to the same cell based on the PCI carried by the SSB. If the first SSB and the second SSB belong to the same cell, the first field in the first SSB takes the first value, which can indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. If the first SSB and the second SSB do not belong to the same cell, the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0265] In some embodiments, the first information may be carried in a second field. The value of the second field in the first SSB is the same as the value of the second field in the second SSB, indicating that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. Conversely, the value of the second field in the first SSB is different from the value of the second field in the second SSB, indicating that the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0266] For example, the second field can be an additional bit in the SSB.
[0267] In related technologies, the lower 3 bits of the SSB index can be obtained from the demodulation reference signal (DMRS) pilot (i) of the physical broadcast channel (PBCH). SSB The middle 3 bits can be obtained from the PBCH payload information. In the FR1 operating band, only 2 or 3 bits are needed to indicate the SSB index. In this case, the second field can reuse the middle 3 bits indicating the SSB index, thus helping to save indication resources and reduce overhead.
[0268] In some embodiments, the first information may be carried in a set of bits, which may be a bitmap. For example, each bit in the set is associated with a corresponding SSB. Taking the first bit in the set as associated with the first SSB and the second bit as associated with the second SSB as an example, the first bit and the second bit are given a fourth value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0269] For example, the first piece of information can be carried in a bit set consisting of 8 bits. This bit set is associated with SSB0, SSB1, SSB2, ..., SSB7 sequentially from the most significant bit to the least significant bit. Taking SSB1 as the first SSB and SSB2 as the second SSB as an example, then the second bit from the most significant bit in the bit set is the first bit, and the third bit is the second bit.
[0270] Taking a fourth value of 1 as an example, the bit set could be 01100010, indicating that the information carried by the PDSCH of the SIBs associated with SSB1, SSB2, and SSB6 is the same. In this case, the first and second bits both take the fourth value, so the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0271] The bit set could also be 00001110, indicating that the PDSCHs of the SIBs associated with SSB4, SSB5, and SSB6 carry the same information. In this case, the values of the first and second bits are not the fourth value, so the information carried by the first PDSCH is different from the information carried by the second PDSCH.
[0272] The above description uses the fourth value as 1. It should be understood that the fourth value can also be 0, and this application does not limit this.
[0273] The above section, with reference to Figure 6, describes the method of configuring whether the PDSCH of SIBs associated with different SSBs supports merged reception by explicit indication. The following section, with reference to Figure 7, describes the method of configuring whether the PDSCH of SIBs associated with different SSBs supports merged reception by implicit indication.
[0274] Figure 7 is a flowchart illustrating another communication method provided in an embodiment of this application. In some embodiments, the method shown in Figure 7 can be applied to terrestrial communication scenarios. In other embodiments, the method shown in Figure 7 can be applied to NTN communication scenarios.
[0275] The method shown in Figure 7 may include steps S710 and S720.
[0276] S710, if the first condition is met, determine that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0277] In this system, the first SIB carried by the first PDSCH is associated with the first SSB, and the second SIB carried by the second PDSCH is associated with the second SSB. The first and second SIBs can be SIB1 mentioned earlier; system messages carrying ephemeris information, such as SIB19; or at least one of the OSI models. It should be understood that the first and second SIBs can also be system messages for cells in future communication systems.
[0278] In some embodiments, the first condition is related to the position of the first PDSCH and / or the position of the second PDSCH. The position of the first PDSCH mentioned herein may refer to the time-domain position or the frequency-domain position of the first PDSCH, and the position of the second PDSCH may refer to the time-domain position or the frequency-domain position of the second PDSCH.
[0279] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, which can be replaced by: the first PDSCH and the second PDSCH support combined reception.
[0280] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, which may include: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0281] The fact that the original bits carried by the first PDSCH are the same as those carried by the second PDSCH can mean that the first SIB and the second SIB are the same. 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 PDSCH are the same as those carried by the second PDSCH can also mean that the first SIB and the second SIB are the same, and that the redundant data in the first PDSCH and the redundant data in the second PDSCH are also the same.
[0282] S720 determines the SIB carried by the first PDSCH, i.e., the first SIB, based on the first PDSCH and the second PDSCH.
[0283] Determining the information carried in the first PDSCH based on the first PDSCH and the second PDSCH can be understood as merging and receiving the first PDSCH and the second PDSCH, and determining the first SIB based on the reception results of the first PDSCH and the second PDSCH. Merged reception can also be replaced by joint reception, merged demodulation, or joint demodulation.
[0284] The following provides examples of various methods for merging and receiving data. It should be understood that this application does not limit the scope of the application.
[0285] As one possible implementation, the signals of the first PDSCH and the second PDSCH can be merged first, and then the merged signal result can be demodulated to obtain the first SIB carried in the first PDSCH.
[0286] This application does not limit the signal combining method; for example, it can be signal superposition or weighted superposition. Since the signal energy increases after signal combining, or in other words, the useful information in the signal increases, demodulating the signal combining result helps to improve demodulation performance.
[0287] This scheme only requires one demodulation to obtain the first SIB in the first PDSCH, which helps to reduce processing complexity and latency caused by the demodulation process.
[0288] It should be noted that the PDSCH signal mentioned here refers to the undemodulated signal. This scheme is applicable to scenarios where the information carried by the first PDSCH is the same as that carried by the second PDSCH, and the modulation and coding schemes of the first PDSCH and the second PDSCH are the same.
[0289] As another possible implementation, the first PDSCH and the second PDSCH can be demodulated separately, and then the demodulation results of the first PDSCH and the second PDSCH can be combined to obtain the first SIB carried in the first PDSCH.
[0290] Due to factors such as the difference in signal-to-noise ratio during the transmission of the first PDSCH and the second PDSCH, the parts that cannot be successfully demodulated in the first PDSCH and the second PDSCH may be different. Therefore, by merging the demodulation results of the first PDSCH and the second PDSCH, it is helpful to obtain the first SIB carried in the first PDSCH, thereby helping to improve demodulation performance.
[0291] 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.
[0292] In addition, different modulation and coding schemes have different resistance to noise interference. Therefore, the probability of bits that cannot be successfully demodulated in the first PDSCH overlapping with bits that cannot be successfully demodulated in the second PDSCH is small, which helps to improve the performance of merging and demodulation.
[0293] By merging the reception of the first PDSCH and the second PDSCH, it is possible to successfully demodulate the first PDSCH within one cycle, thereby improving the demodulation performance of the first PDSCH. Compared with related technologies, the scheme in this application embodiment does not require waiting for multiple cycles during the reception of the first PDSCH, thus helping to reduce access latency.
[0294] In this embodiment, on the one hand, by independently configuring whether the PDSCH of the SIBs carrying different SSBs associated with each other supports merged reception, it helps to match demodulation requirements and improve the flexibility of the system.
[0295] On the other hand, by independently configuring whether the PDSCH of SIBs carrying different SSBs support combined reception, it helps to balance the flexibility of regional SIBs and the enhancement of demodulation performance of cell-level SIBs.
[0296] On the other hand, by indicating whether the PDSCH of SIBs carrying different SSB associations supports merged reception through the first condition, the terminal device can be enabled to merged reception of PDSCHs carrying different SSB associations without additional indication information, which helps to save indication resources.
[0297] The first condition will be explained in detail below with reference to Examples 1 to 4.
[0298] Example 1
[0299] In some embodiments, the first condition may include: detecting (or receiving) a first PDSCH at the location indicated by the first PDCCH, and detecting (or receiving) a second PDSCH at the location indicated by the second PDCCH. The first PDCCH is used to schedule the first PDSCH, and the second PDCCH is used to schedule the second PDSCH.
[0300] Accordingly, when the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and when the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0301] Alternatively, in other embodiments, the first condition may include: detecting (or receiving) a first PDSCH at a position offset by a second value relative to the position indicated by the first PDCCH, and detecting (or receiving) a second PDSCH at a position offset by a second value relative to the position indicated by the second PDCCH. The first PDCCH is used to schedule the first PDSCH, and the second PDCCH is used to schedule the second PDSCH.
[0302] Accordingly, if the first PDSCH is detected at the location indicated by the first PDCCH and the second PDSCH is detected at the location indicated by the second PDCCH, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0303] In related technologies, the position indicated by the PDCCH is the position of the PDSCH. However, in this embodiment, the position indicated by the first PDCCH is a candidate position of the first PDSCH, and the position indicated by the second PDCCH is a candidate position of the second PDSCH. Furthermore, based on the position indicated by the first PDCCH (i.e., a candidate position of the first PDSCH), another candidate position of the first PDSCH can be determined; similarly, based on the position indicated by the second PDCCH (i.e., a candidate position of the second PDSCH), another candidate position of the second PDSCH can be determined.
[0304] This scheme can determine whether the first PDSCH and the second PDSCH support combined reception based on the relationship between the monitored PDSCH location and the location indicated by the PDCCH, which helps to reduce resource overhead.
[0305] In some embodiments, the location indicated by the first PDCCH is a time-domain location, and the location indicated by the second PDCCH is a time-domain location; or, the location indicated by the first PDCCH is a frequency-domain location, and the location indicated by the second PDCCH is a frequency-domain location.
[0306] For example, the two candidate positions of the first PDSCH can be located in the same time slot, and the two candidate positions of the second PDSCH can be located in the same time slot to reduce the processing complexity.
[0307] First, taking the position indicated by the first PDCCH as the time-domain position and the position indicated by the second PDCCH as the time-domain position as an example, the first condition will be introduced.
[0308] Taking the position indicated by the first PDCCH as time slot n0#SSB1 (i.e., a candidate position of the first PDSCH) and the position indicated by the second PDCCH as time slot n0#SSB2 (i.e., a candidate position of the second PDSCH) as an example, the terminal device can determine another candidate position of the first PDSCH as n0#SSB1+X (the second value is denoted as X) based on time slot n0#SSB1, and can determine another candidate position of the second PDSCH as n0#SSB2+X based on n0#SSB2.
[0309] The terminal device can monitor the first PDSCH at n0#SSB1 and n0#SSB1+X, and the second PDSCH at n0#SSB2 and n0#SSB2+X. In this case, the frequency domain positions of the first PDSCH and the second PDSCH can be determined according to the methods in related technologies.
[0310] If the first condition includes: detecting a first PDSCH at the location indicated by the first PDCCH and detecting a second PDSCH at the location indicated by the second PDCCH, then if the terminal device receives the first PDSCH at n0#SSB1 and the second PDSCH at n0#SSB2, then the first condition is satisfied, meaning that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the cell-level SIB mentioned above.
[0311] Correspondingly, if the terminal device receives the first PDSCH at n0#SSB1+X and the second PDSCH at n0#SSB2+X, then the first condition is not met, meaning that the information carried by the first PDSCH is different from the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the regional-level SIB mentioned above.
[0312] If the first condition includes detecting the first PDSCH at a position offset by a second value relative to the position indicated by the first PDCCH, and detecting the second PDSCH at a position offset by a second value relative to the position indicated by the second PDCCH, then the terminal device receives the first PDSCH at n0#SSB1+X and the second PDSCH at n0#SSB2+X, thus satisfying the first condition, i.e., the information carried by the first PDSCH is the same as the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the cell-level SIB mentioned above.
[0313] Correspondingly, if the terminal device receives the first PDSCH at n0#SSB1 and the second PDSCH at n0#SSB2, the first condition is not met, meaning the information carried by the first PDSCH is different from the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the area-level SIB mentioned earlier.
[0314] The above scheme uses the second value of X time slots as an example to introduce the first condition. It should be understood that the second value can also be X ms, X us, or X symbols, etc. This application does not limit it.
[0315] The first condition will be explained below, taking the second value of X symbols as an example.
[0316] Taking the position indicated by the first PDCCH as the L1 consecutive symbols starting from the S1th symbol in time slot n0#SSB1 (i.e., a candidate position of the first PDSCH), and the position indicated by the second PDCCH as the L2 consecutive symbols starting from the S2th symbol in time slot n0#SSB2 (i.e., a candidate position of the second PDSCH), the terminal device can determine another candidate position of the first PDSCH as the L1 consecutive symbols starting from the S1+Xth symbol in n0#SSB1 based on the position indicated by the first PDCCH, and can determine another candidate position of the second PDSCH as the L2 consecutive symbols starting from the S2+Xth symbol in n0#SSB2 based on the position indicated by the second PDCCH.
[0317] The terminal device can monitor the first PDSCH on the consecutive L1 symbols starting from the S1th symbol and the consecutive L1 symbols starting from the S1+Xth symbol in n0#SSB1, and monitor the second PDSCH on the consecutive L2 symbols starting from the S2th symbol and the consecutive L2 symbols starting from the S2+Xth symbol in n0#SSB2. In this case, the frequency domain positions of the first PDSCH and the second PDSCH can be determined according to the methods in related technologies.
[0318] If the first condition includes: the first PDSCH is detected at the location indicated by the first PDCCH, and the second PDSCH is detected at the location indicated by the second PDCCH, then the first condition is satisfied if the terminal device receives the first PDSCH for L1 consecutive symbols starting from the S1th symbol in n0#SSB1, and receives the second PDSCH for L2 consecutive symbols starting from the S2th symbol in n0#SSB2, that is, the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0319] If the first condition includes: detecting the first PDSCH at a position offset by a second value relative to the position indicated by the first PDCCH, and detecting the second PDSCH at a position offset by a second value relative to the position indicated by the second PDCCH, then the terminal device receives the first PDSCH for L1 consecutive symbols starting from the S1+Xth symbol in n0#SSB1, and receives the second PDSCH for L2 consecutive symbols starting from the S2+Xth symbol in n0#SSB2, then the first condition is satisfied, that is, the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0320] For example, S1 is 2, L1 is 2, and X is 2 symbols. This means that one candidate position for the first PDSCH indicated by the first PDCCH is two consecutive symbols starting from the second symbol in time slot n0#SSB1, namely symbols 2 and 3. Another candidate position for the first PDSCH is two consecutive symbols starting from the fourth symbol in time slot n0#SSB1, namely symbols 4 and 5. In other words, the terminal device can monitor the first PDSCH at symbols 2 and 3, and symbols 4 and 5 in n0#SSB1.
[0321] For example, if S2 is 6, L2 is 2, and X is 2 symbols, then one candidate position for the second PDSCH indicated by the second PDCCH is two consecutive symbols starting from the 6th symbol in time slot n0#SSB2, namely symbols 6 and 7. Another candidate position for the second PDSCH is two consecutive symbols starting from the 8th symbol in time slot n0#SSB2, namely symbols 8 and 9. In other words, the terminal device can monitor the second PDSCH at symbols 6 and 7, and symbols 8 and 9 in n0#SSB2.
[0322] Therefore, the first condition may include: a first PDSCH is detected in symbols 2 and 3 in n0#SSB1, and a second PDSCH is detected in symbols 6 and 7 in n0#SSB2, or a first PDSCH is detected in symbols 4 and 5 in n0#SSB1, and a second PDSCH is detected in symbols 8 and 9 in n0#SSB2.
[0323] In the example above, the two candidate positions of the first PDSCH occupy 4 symbols, and the two candidate positions of the second PDSCH occupy 4 symbols. Therefore, the first PDSCH and the second PDSCH can be located in the same time slot, that is, n0#SSB1 and n0#SSB2 can be the same; or, the first PDSCH and the second PDSCH can be located in different time slots.
[0324] In another example, S1 is 2, L1 is 4, S2 is 2, L2 is 4, and X is 4 symbols. That is, one candidate position for the first PDSCH indicated by the first PDCCH is the four consecutive symbols starting from the second symbol in time slot n0#SSB1, i.e., symbols 2 to 5; another candidate position for the first PDSCH is the four consecutive symbols starting from the sixth symbol in time slot n0#SSB1, i.e., symbols 6 to 9. Similarly, one candidate position for the second PDSCH indicated by the second PDCCH is the four consecutive symbols starting from the second symbol in time slot n0#SSB2, i.e., symbols 2 to 5; another candidate position for the second PDSCH is the four consecutive symbols starting from the sixth symbol in time slot n0#SSB2, i.e., symbols 6 to 9.
[0325] In other words, the terminal device can monitor the first PDSCH using symbols 2 to 5 and symbols 6 to 9 in n0#SSB1; and monitor the second PDSCH using symbols 2 to 5 and symbols 6 to 9 in n0#SSB2.
[0326] Therefore, the first condition may include: a first PDSCH is detected in symbols 2 to 5 of n0#SSB1, and a second PDSCH is detected in symbols 2 to 5 of n0#SSB2. If the first condition is met, the first PDSCH and the second PDSCH can be received together.
[0327] Conversely, if the first PDSCH is detected in symbols 6 to 9 of n0#SSB1, and the second PDSCH is detected in symbols 6 to 9 of n0#SSB2, then the first condition is not met, meaning that the first PDSCH and the second PDSCH do not support combined reception.
[0328] Alternatively, the first condition may include: a first PDSCH is detected in symbols 6 to 9 of n0#SSB1, and a second PDSCH is detected in symbols 6 to 9 of n0#SSB2. If the first condition is met, the first PDSCH and the second PDSCH support combined reception.
[0329] Conversely, if the first PDSCH is detected in symbols 2 to 5 of n0#SSB1, and the second PDSCH is detected in symbols 2 to 5 of n0#SSB2, then the first condition is not met, meaning that the first PDSCH and the second PDSCH do not support combined reception.
[0330] In this example, the first PDSCH and the second PDSCH can be located in different time slots, that is, n0#SSB1 and n0#SSB2 are different.
[0331] It should be understood that the number of symbols occupied by PDSCH and the position of the symbols occupied by PDSCH in the time slots in the above examples are given for illustrative purposes only, and this application does not limit them.
[0332] To reduce access latency, the second value can be set to a smaller value, provided that the candidate positions of the two types of PDSCH mentioned above can be distinguished.
[0333] Secondly, taking the position indicated by the first PDCCH as the frequency domain position and the position indicated by the second PDCCH as the frequency domain position as an example, the first condition will be introduced.
[0334] Taking the position indicated by the first PDCCH as the first frequency domain position (denoted as K#SSB1) and the position indicated by the second PDCCH as the second frequency domain position (denoted as K#SSB2) as an example, one candidate position of the first PDSCH is K#SSB1, and the terminal device can determine another candidate position of the first PDSCH as K#SSB1+X (the second value is denoted as X) based on K#SSB1; one candidate position of the second PDSCH is K#SSB2, and the terminal device can determine another candidate position of the second PDSCH as K#SSB2+X based on K#SSB2.
[0335] The terminal device can monitor the first PDSCH at K#SSB1 and K#SSB1+X, and the second PDSCH at K#SSB2 and K#SSB2+X. In this case, the time domain positions of the first PDSCH and the second PDSCH can be determined according to methods in related technologies.
[0336] If the first condition includes: detecting a first PDSCH at the location indicated by the first PDCCH and detecting a second PDSCH at the location indicated by the second PDCCH, then if the terminal device receives the first PDSCH at K#SSB1 and the second PDSCH at K#SSB2, then the first condition is satisfied, meaning that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the cell-level SIB mentioned above.
[0337] Correspondingly, if the terminal device receives the first PDSCH at K#SSB1+X and the second PDSCH at K#SSB2+X, then the first condition is not met, meaning that the information carried by the first PDSCH is different from the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the area-level SIB mentioned earlier.
[0338] If the first condition includes detecting a first PDSCH at a position offset by a second value relative to the position indicated by the first PDCCH, and detecting a second PDSCH at a position offset by a second value relative to the position indicated by the second PDCCH, then if the terminal device receives the first PDSCH at K#SSB1+X and the second PDSCH at K#SSB2+X, then the first condition is satisfied, meaning that the information carried by the first PDSCH is the same as the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the cell-level SIB mentioned above.
[0339] Accordingly, if the terminal device receives the first PDSCH at K#SSB1 and the second PDSCH at K#SSB2, the first condition is not met, meaning the information carried by the first PDSCH is different from the information carried by the second PDSCH. In this case, the first SIB carried by the first PDSCH and the second SIB carried by the second PDSCH can, for example, be the area-level SIB mentioned above. In some embodiments, the second value can be predefined, such as that predefined by the protocol, to reduce indication overhead.
[0340] Alternatively, the second value can be carried in the first SSB or the first PDCCH, which helps to improve flexibility. For example, the second value can be flexibly configured according to the available resource size.
[0341] It should be noted that, taking K#SSB1 as a resource block (RB1) to RBn as an example, K#SSB1+X can refer to (RB1+X) to (RBn+X).
[0342] It should be understood that in the above scheme, the second value can be a frequency domain value. For example, the second value can be X subcarriers, X RBs, X MHz, etc. This application does not limit this.
[0343] It should be understood that the second value can be positive or negative.
[0344] For example, the second value can be 1 time slot, meaning n0#SSB1+X is the time slot after n0#SSB1. Alternatively, the second value can be -1 time slot, meaning n0#SSB1+X is the time slot before n0#SSB1.
[0345] For example, the second value is 20RB or -20RB. Taking the first frequency domain resource as 30RB to 40RB (denoted as K#SSB1) as an example, K#SSB1+X can be 10RB to 20RB, or it can be 50RB to 60RB.
[0346] Alternatively, taking the position indicated by the first PDCCH as time slot n0#SSB1 as an example, the position offset by the second value (denoted as X) relative to the position indicated by the first PDCCH can be time slot n0#SSB1-X.
[0347] Taking the position indicated by the first PDCCH as the first frequency domain position (denoted as K#SSB1) as an example, the position offset by the second value (denoted as X) relative to the position indicated by the first PDCCH can be K#SSB1-X.
[0348] The above describes a method for implicitly indicating that the information carried by the first PDSCH is the same as the information carried by the second PDSCH based on the location of the PDSCH. The following describes a method for implicitly indicating that the information carried by the first PDSCH is the same as the information carried by the second PDSCH based on the location of the PDCCH.
[0349] Example 2
[0350] In some embodiments, the first condition may include: detecting a first PDCCH at a location indicated by a first SSB, and detecting a second PDCCH at a location indicated by a second SSB.
[0351] Accordingly, when the first PDSCH is detected at a position offset by a fifth value relative to the position indicated by the first SSB, and when the second PDSCH is detected at a position offset by a fifth value relative to the position indicated by the second SSB, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0352] In related technologies, the location indicated by the SSB is the monitoring location of the PDCCH. However, in this embodiment, the location indicated by the first SSB is a candidate location of the first PDCCH, and the location indicated by the second SSB is a candidate location of the second PDCCH. Furthermore, based on the location indicated by the first SSB (i.e., a candidate location of the first PDCCH), another candidate location of the first PDCCH can be determined; similarly, based on the location indicated by the second SSB (i.e., a candidate location of the second PDCCH), another candidate location of the second PDCCH can be determined.
[0353] In other words, based on the relationship between the monitored PDCCH location and the location indicated by the SSB, it can be determined whether the PDSCH scheduled by the PDCCH supports merged reception.
[0354] Taking the position indicated by the first SSB as time slot n0#SSB1 (i.e., a candidate position of the first PDCCH) and the position indicated by the second SSB as n0#SSB2 (i.e., a candidate position of the second PDCCH) as an example, the terminal device can determine another candidate position of the first PDCCH as n0#SSB1+Y (the fifth value is denoted as Y) based on time slot n0#SSB1, and can determine another candidate position of the second PDCCH as n0#SSB2+Y based on n0#SSB2.
[0355] The terminal device can monitor the first PDCCH at n0#SSB1 and n0#SSB1+Y, and the second PDCCH at n0#SSB2 and n0#SSB2+Y. In this case, the frequency domain positions of the first PDCCH and the second PDCCH can be determined according to the methods in related technologies.
[0356] If the first condition includes: detecting a first PDCCH at the location indicated by the first SSB and detecting a second PDCCH at the location indicated by the second SSB, then if the terminal device receives the first PDCCH at n0#SSB1 and the second PDCCH at n0#SSB2, then the first condition is satisfied, meaning that the information carried by the first PDCCH is the same as the information carried by the second PDCCH. In this case, the first SIB carried by the first PDCCH and the second SIB carried by the second PDCCH can, for example, be the cell-level SIB mentioned above.
[0357] Correspondingly, if the terminal device receives the first PDCCH at n0#SSB1+Y and the second PDCCH at n0#SSB2+Y, then the first condition is not met, meaning that the information carried by the first PDCCH is different from the information carried by the second PDCCH. In this case, the first SIB carried by the first PDCCH and the second SIB carried by the second PDCCH can, for example, be the area-level SIB mentioned above.
[0358] If the first condition includes detecting a first PDCCH at a position offset by a fifth value relative to the position indicated by the first SSB, and detecting a second PDCCH at a position offset by a fifth value relative to the position indicated by the second SSB, then the terminal device receives the first PDCCH at n0#SSB1+Y and the second PDCCH at n0#SSB2+Y, thus satisfying the first condition, meaning that the information carried by the first PDCCH is the same as the information carried by the second PDCCH. In this case, the first SIB carried by the first PDCCH and the second SIB carried by the second PDCCH can, for example, be the cell-level SIB mentioned above.
[0359] Correspondingly, if the terminal device receives the first PDCCH at n0#SSB1 and the second PDCCH at n0#SSB2, the first condition is not met, meaning that the information carried by the first PDCCH is different from the information carried by the second PDCCH. In this case, the first SIB carried by the first PDCCH and the second SIB carried by the second PDCCH can, for example, be the area-level SIB mentioned above.
[0360] The above example uses Y time slots as the fifth value to illustrate the first condition. It should be understood that the fifth value can also be Y ms, Y us, or Y symbols, etc., and this application does not limit this. For a scheme with a fifth value of Y symbols, please refer to the relevant introduction of the scheme with a second value of X symbols in Example 1 above.
[0361] The above example uses the position indicated by the first SSB and the position indicated by the second SSB as examples to introduce the first condition. It should be understood that the position indicated by the first SSB can also be a frequency domain position, and the position indicated by the second SSB can also be a frequency domain position. This method is similar to the one described above, and for simplicity, it will not be repeated here. It should also be understood that the fifth value can be a frequency domain value, such as Y subcarriers, Y RBs, Y MHz, etc., and this application does not limit this.
[0362] In some embodiments, the fifth value may be predefined, such as protocol-predefined, to reduce indication overhead.
[0363] Alternatively, the fifth value can be carried in the first SSB or the first PDCCH, which helps to improve flexibility. For example, the fifth value can be flexibly configured according to the available resource size.
[0364] It should be understood that the fifth value can be positive or negative.
[0365] For example, the fifth value can be 2 time slots. If n0#SSB1 is the 3rd time slot, then n0#SSB1+Y is the 5th time slot. Alternatively, the fifth value can be -1 time slot. If n0#SSB1 is the 3rd time slot, then n0#SSB1+Y is the 2nd time slot.
[0366] For example, the fifth value can be 10RB, or the fifth value can be -10RB.
[0367] Alternatively, taking the position indicated by the first SSB as time slot n0#SSB1 as an example, the position offset by the fifth value (denoted as Y) relative to the position indicated by the first SSB can be time slot n0#SSB1-Y.
[0368] Example 3
[0369] In some embodiments, the first condition may include: a first PDSCH is detected on the first 1 / N bandwidth of frequency domain resources in the first frequency domain resources, and a second PDSCH is detected on the first 1 / N bandwidth of frequency domain resources in the second frequency domain resources. Wherein, N is a positive integer.
[0370] Correspondingly, if a first PDSCH is detected on a frequency domain resource with a bandwidth of (N-1) / N in the first frequency domain resource, and a second PDSCH is detected on a frequency domain resource with a bandwidth of (N-1) / N in the second frequency domain resource, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0371] Alternatively, in other embodiments, the first condition may include: a first PDSCH is detected on a frequency domain resource with a bandwidth of (N-1) / N in the first frequency domain resource, and a second PDSCH is detected on a frequency domain resource with a bandwidth of (N-1) / N in the second frequency domain resource.
[0372] Correspondingly, if a first PDSCH is detected on the first 1 / N bandwidth of frequency domain resources in the first frequency domain resources, and a second PDSCH is detected on the first 1 / N bandwidth of frequency domain resources in the second frequency domain resources, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0373] For example, N is 2. That is, the first condition may include: a first PDSCH is detected on the first half bandwidth of the first frequency domain resources, and a second PDSCH is detected on the first half bandwidth of the second frequency domain resources; or, a first PDSCH is detected on the latter half bandwidth of the first frequency domain resources, and a second PDSCH is detected on the latter half bandwidth of the second frequency domain resources. In this way, resource utilization can be maximized while ensuring the transmission of both the first and second PDSCHs.
[0374] For example, N can be predefined, such as by the protocol, for ease of implementation. Alternatively, N can be carried on the first SSB or the first PDCCH, and can be flexibly configured according to usage requirements.
[0375] In some embodiments, the first condition may include detecting a first PDSCH on the first N / M bandwidth of frequency domain resources in the first frequency domain resources, and detecting a second PDSCH on the first N / M bandwidth of frequency domain resources in the second frequency domain resources; or, the first condition may include detecting a first PDSCH on the last (MN) / M bandwidth of frequency domain resources in the first frequency domain resources, and detecting a second PDSCH on the last (MN) / M bandwidth of frequency domain resources in the second frequency domain resources. Where M and N are both positive integers.
[0376] This approach helps improve system flexibility. For example, since regional-level system messages are configured separately, the information carried in them differs from that carried in cell-level system messages. Therefore, the transmission resource requirements for regional-level and cell-level system messages may differ. Based on this, M and / or N can be determined according to the resource requirements for transmitting regional-level and cell-level system messages.
[0377] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB (and / or the second SSB) or the first PDCCH (and / or the second PDCCH).
[0378] For example, both M and N can be predefined. Alternatively, M can be predefined, while N can be flexibly configured, thus balancing flexibility and implementation complexity. Or, both M and N can be flexibly configured, resulting in a highly flexible system.
[0379] Example 4
[0380] In some embodiments, the first condition may include detecting a first PDSCH on the first N / M time-domain resources in the first time-domain resources, and detecting a second PDSCH on the first N / M time-domain resources in the second time-domain resources. Here, M and N are both positive integers.
[0381] Correspondingly, if a first PDSCH is detected on the time domain resources after (MN) / M in the first time domain resources, and a second PDSCH is detected on the time domain resources after (MN) / M in the second time domain resources, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0382] Alternatively, the first condition may include detecting a first PDSCH on time-domain resources after (MN) / M in the first time-domain resource, and detecting a second PDSCH on time-domain resources after (MN) / M in the second time-domain resource. Where M and N are both positive integers.
[0383] Correspondingly, if the first PDSCH is detected on the first N / M time domain resources in the first time domain resources, and the second PDSCH is detected on the first N / M time domain resources in the second time domain resources, the information carried by the first PDSCH is different from the information carried by the second PDSCH, that is, the first PDSCH and the second PDSCH do not support combined reception.
[0384] This approach helps improve system flexibility. For example, since regional-level system messages are configured separately, the information carried in them differs from that carried in cell-level system messages. Therefore, the transmission resource requirements for regional-level and cell-level system messages may differ. Based on this, M and / or N can be determined according to the resource requirements for transmitting regional-level and cell-level system messages.
[0385] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB (and / or the second SSB) or the first PDCCH (and / or the second PDCCH).
[0386] For example, both M and N can be predefined. Alternatively, M can be predefined, while N can be flexibly configured, thus balancing flexibility and implementation complexity. Or, both M and N can be flexibly configured, resulting in a highly flexible system.
[0387] For example, M is 2 and N is 1. Taking symbols 2 to 5 in n0#SSB1 as the first time-domain resource and symbols 6 to 9 in n0#SSB2 as the second time-domain resource, the first condition may include the detection of the first PDSCH in the first half of the time-domain resources, i.e., symbols 2 and 3 in n0#SSB1, and the detection of the second PDSCH in the first half of the time-domain resources, i.e., symbols 6 and 7 in n0#SSB2.
[0388] Alternatively, the first condition may include the detection of the first PDSCH in the latter half of the first time domain resource, i.e., symbols 4 and 5 in n0#SSB1, and the detection of the second PDSCH in the latter half of the second time domain resource, i.e., symbols 8 and 9 in n0#SSB2.
[0389] In some embodiments, the amount of resources occupied by the first PDSCH and the second PDSCH, such as the number of symbols, can be different, which helps to balance resource overhead and coverage performance.
[0390] For example, in areas with a good link budget, fewer resources can be used to transmit the PDSCH carrying the SIB, while in areas with a poor link budget, more resources can be used. For instance, if the first SIB is located in an area with a good link budget, only 4 symbols are needed to transmit the first PDSCH, resulting in high spectral efficiency if a higher-order modulation and coding scheme (MCS) is used. Conversely, if the second SIB is located in an area with a poor link budget, 6 symbols are needed to transmit the second PDSCH, which helps reduce the code rate and improve coverage performance. In this case, the first and second PDSCHs can support combined reception, further improving demodulation performance.
[0391] It should be understood that when the amount of resources occupied by the first PDSCH and the second PDSCH is different, the DCI in the first PDCCH is different from that in the second PDCCH. In other words, the first PDCCH and the second PDCCH do not support combined reception.
[0392] In this embodiment, the scheme of independently configuring whether the PDSCH of SIBs carrying different SSBs associated with each other supports merged reception can be applied to the above-mentioned scenarios. By independently configuring whether the PDSCH supports merged reception, it is possible to flexibly match different link budget conditions, different downlink coverage performance conditions, or different resource quantities occupied by the PDSCH, etc.
[0393] To facilitate understanding, the methods provided in the embodiments of this application will be described below with reference to two specific examples.
[0394] Figure 8 is a flowchart illustrating another communication method provided in an embodiment of this application. The method shown in Figure 8 is a method for displaying whether the PDSCH carrying different SSB associated SIBs supports merged reception.
[0395] The method shown in Figure 8 includes steps 1 to 3.
[0396] Step 1: The network device sends multiple different SSBs. Correspondingly, the terminal device receives multiple SSBs.
[0397] The PDSCH carrying SIBs associated with different SSBs is used to indicate whether combined reception is supported. In other words, the first piece of information mentioned above can be carried in the SSB or MIB-E.
[0398] For example, one bit can be added to the SSB or MIB-E. For instance, a value of 1 indicates that the PDSCH carrying SIBs associated with different SSBs supports combined reception, or that multiple SSBs are associated with the same SIB. Conversely, a value of 0 indicates that the PDSCH carrying SIBs associated with different SSBs does not support combined reception, or that multiple SSBs are associated with different SIBs.
[0399] The terminal device can perform downlink timing synchronization based on the received SSBs and determine the candidate SSB index set {i} based on the received signals. Referring to Figure 3, the terminal device determines SSB 0, SSB 1, and SSB 2 as receivable SSBs based on energy detection, thus the candidate SSB index set is {0,1,2}.
[0400] The terminal device can determine, based on the first information carried in the candidate SSB, that the PDSCH carrying multiple candidate SSBs associated with SIBs supports combined reception, or in other words, it can determine, based on the first information, that multiple candidate SSBs are associated with the same SIB.
[0401] Taking multiple candidate SSBs, including a first SSB and a second SSB, as an example, the first SSB is associated with the first SIB, and the second SSB is associated with the second SIB. The first PDSCH is used to carry the first SIB, and the second PDSCH is used to carry the second SIB. The first PDCCH is used to schedule the first PDSCH, and the second PDCCH is used to schedule the second PDSCH. The terminal device can determine the monitoring location of the first PDCCH and the second PDCCH based on the parsing results of the first SSB and the second SSB.
[0402] Step 2: The network device sends multiple SSB-associated SIBs. These SIBs may include SIB1, SIB19, etc.
[0403] Correspondingly, the terminal device can receive SIBs associated with multiple different SSBs.
[0404] The terminal device can monitor the first PDCCH and the second PDCCH according to the location determined in step 1, and parse the first PDCCH and the second PDCCH to obtain the monitoring location of the first PDSCH and the monitoring location of the second PDSCH.
[0405] Step 3: Merge and receive multiple PDSCHs (each PDSCH is used to carry a different SSB associated with a SIB) to obtain system messages.
[0406] At the monitoring location determined in step 2, a first PDSCH and a second PDSCH are received, and a first SIB is determined based on the first PDSCH and the second PDSCH. For example, the signals from the first PDSCH and the second PDSCH are combined, and the combined result is demodulated to obtain the first SIB. Alternatively, the first PDSCH and the second PDSCH are demodulated separately, and the demodulation results are combined to obtain the first SIB. This scheme helps improve demodulation performance.
[0407] Alternatively, if the signal quality of the first SSB is better than that of the second SSB, the terminal device first demodulates the first PDSCH. If the demodulation is successful, a random access procedure is initiated; if the demodulation fails, the second PDSCH is received, and the first SIB is determined based on the first PDSCH and the second PDSCH.
[0408] In this embodiment of the application, the network side indicates whether the information carried by the first PDSCH is the same as the information carried by the second PDSCH, thus preserving the possibility of flexible SIB configuration. At the same time, the terminal device can accurately know when it is possible to merge and receive the first PDSCH and the second PDSCH.
[0409] Figure 9 is a flowchart illustrating another communication method provided in an embodiment of this application. The method shown in Figure 9 is a method for implicitly indicating whether the PDSCH carrying different SSB associations of SIBs supports merged reception.
[0410] The method shown in Figure 9 is illustrated using the example of cell-level system messages supporting merged reception, while area-level system messages (or waveband-level system messages) do not support merged reception. This method may include steps 1 to 3.
[0411] Step 1: The network device sends multiple different SSBs. Correspondingly, the terminal device receives multiple SSBs.
[0412] The terminal device can perform downlink timing synchronization based on the received SSBs and determine the candidate SSB index set {i} based on the received signals. Referring to Figure 3, the terminal device determines SSB 0, SSB 1, and SSB 2 as receivable SSBs based on energy detection, thus the candidate SSB index set is {0,1,2}.
[0413] Step 2: The network device sends multiple SSB-associated SIBs. These SIBs may include SIB1, SIB19, etc.
[0414] As one possible implementation, network devices can send cell-level system messages in time slot n0 and area-level system messages in time slot n0+X, i.e., in a time-division transmission mode. The DCI in the PDCCH is determined based on methods in related technologies, meaning the location indicated by the DCI is time slot n0.
[0415] As another possible implementation, taking an available frequency domain resource bandwidth of W as an example, network devices can send cell-level system messages with the first W / 2 bandwidth and area-level system messages with the second W / 2 bandwidth, i.e., frequency division multiplexing (FDM). The DCI in the PDCCH is determined based on methods in related technologies, i.e., the frequency domain resource bandwidth indicated by the DCI is W.
[0416] It should be understood that the location of cell-level system messages and the location of area-level system messages can be interchanged, and this application does not limit this.
[0417] Correspondingly, the terminal device can receive SIBs associated with multiple different SSBs.
[0418] Taking multiple candidate SSBs, including a first SSB and a second SSB, as an example, the first SSB is associated with the first SIB, the second SSB is associated with the second SIB, the first PDSCH is used to carry the first SIB, the second PDSCH is used to carry the second SIB, the first PDCCH is used to schedule the first PDSCH, and the second PDCCH is used to schedule the second PDSCH.
[0419] The terminal device can determine the monitoring locations of the first PDCCH and the second PDCCH based on the parsing results of the first SSB and the second SSB.
[0420] Step 3: The terminal device determines whether multiple PDSCHs support merged reception based on the location of the multiple PDSCHs (each PDSCH is used to carry a different SSB associated with a SIB).
[0421] Step 3 will be described below for both time-division and frequency-division methods.
[0422] Time-division method
[0423] Based on the parsing results of the first PDCCH, a candidate monitoring location (n0#SSB1) for the first PDSCH can be determined, and based on the parsing results of the second PDCCH, a candidate monitoring location (n0#SSB2) for the second PDSCH can be determined.
[0424] Based on one candidate monitoring location of the first PDSCH, another candidate monitoring location of the first PDSCH can be determined. For example, based on one candidate monitoring location of the first PDSCH and a second value (denoted as X), another candidate monitoring location of the first PDSCH (n0#SSB1+X) can be determined, as shown in Figure 10. The second value can be predefined by the protocol or carried in the first SSB or the first PDCCH.
[0425] Based on one candidate monitoring location of the second PDSCH, another candidate monitoring location of the second PDSCH can be determined. For example, based on one candidate monitoring location of the second PDSCH and a second value (denoted as X), another candidate monitoring location of the first PDSCH (n0#SSB2+X) can be determined, as shown in Figure 11. The second value can be predefined by the protocol or carried in the first SSB or the first PDCCH.
[0426] The terminal device monitors the first PDSCH and the second PDSCH at the aforementioned candidate locations, respectively.
[0427] If the first PDSCH is detected at n0#SSB1 and the second PDSCH is detected at n0#SSB2, then the first PDSCH and the second PDSCH can be received together, that is, the first SIB and the second SIB are the same, which is a cell-level system message.
[0428] In this scenario, the terminal device can receive the first PDSCH and the second PDSCH together to determine the first SIB. Alternatively, the terminal device can first demodulate the first PDSCH, and if the first PDSCH fails to demodulate, receive the second PDSCH and determine the first SIB based on the first PDSCH and the second PDSCH.
[0429] If the first PDSCH is detected at n0#SSB1+X and the second PDSCH is detected at n0#SSB2+X, then the first PDSCH and the second PDSCH do not support being received together. That is, the first SIB and the second SIB are different and are regional system messages.
[0430] In this case, if the first PDSCH demodulation is successful, the first SIB is determined based on the first PDSCH; if the first PDSCH demodulation is unsuccessful, the first SIB is determined based on the PDSCH of the first SIB associated with the first SSB in the next cycle.
[0431] Frequency division method
[0432] The first frequency domain resource can be determined based on the parsing result of the first PDCCH. The starting position of the first frequency domain resource is offset relative to the lower boundary of the frequency domain resource of the first SSB by offset, and the bandwidth of the first frequency domain resource is W.
[0433] The locations of the first W / 2 and the second W / 2 resources can be determined based on the first frequency domain resources, as shown in Figure 12. The terminal device can monitor the first PDSCH at the first W / 2 and second W / 2 resource locations in the first frequency domain.
[0434] The second frequency domain resource can be determined based on the parsing results of the second PDCCH. The starting position of the second frequency domain resource is offset from the lower boundary of the frequency domain resource of the second SSB by offset, and the bandwidth of the second frequency domain resource is W.
[0435] The locations of the resources before and after W / 2 can be determined based on the second frequency domain resources, as shown in Figure 13. The terminal device can monitor the second PDSCH at the locations of the resources before and after W / 2 in the second frequency domain.
[0436] If a first PDSCH is detected at the first W / 2 of the resource location in the first frequency domain and a second PDSCH is detected at the first W / 2 of the resource location in the second frequency domain, then the first PDSCH and the second PDSCH support combined reception, that is, the first SIB and the second SIB are the same, which is a cell-level system message.
[0437] In this scenario, the terminal device can receive the first PDSCH and the second PDSCH together to determine the first SIB. Alternatively, the terminal device can first demodulate the first PDSCH, and if the first PDSCH fails to demodulate, receive the second PDSCH and determine the first SIB based on the first PDSCH and the second PDSCH.
[0438] If a first PDSCH is detected at a resource location W / 2 after the first frequency domain resource and a second PDSCH is detected at a resource location W / 2 after the second frequency domain resource, then the first PDSCH and the second PDSCH do not support combined reception, that is, the first SIB and the second SIB are different and are regional system messages.
[0439] In this case, if the first PDSCH demodulation is successful, the first SIB is determined based on the first PDSCH; if the first PDSCH demodulation is unsuccessful, the cell system message is obtained based on the PDSCH of the first SIB associated with the first SSB in the next cycle.
[0440] This embodiment defines time-division / frequency-division transmission methods for regional system messages and cell-level system messages, preserving the possibility of flexible SIB configuration, while also enabling terminal devices to accurately determine whether PDSCH merging can be performed, thus improving configuration flexibility.
[0441] It should be noted that in the embodiments of this application, the success of demodulation can be determined based on the relationship between the signal-to-noise ratio (SNR) and the threshold value. For example, if the SNR of the first PDSCH is greater than or equal to the threshold value, the first PDSCH can be successfully demodulated; if the SNR of the first PDSCH is less than the threshold value, the first PDSCH cannot be successfully demodulated. It should be understood that other methods can also be used to determine whether the signal can be successfully demodulated.
[0442] It should be noted that in the embodiments of this application, the first PDCCH and the second PDCCH can be transmitted first, and then the first PDSCH and the second PDSCH can be transmitted to ensure that multiple DCIs can be demodulated in a timely manner, and to provide support for the combined reception of PDCCH, such as helping to reduce the latency caused by the combined reception of the first PDCCH and the second PDCCH.
[0443] Alternatively, the first PDCCH and the first PDSCH can be transmitted first, followed by the second PDCCH and the second PDSCH, to ensure that the relevant channels of the SIB associated with the same SSB can be demodulated in a timely manner.
[0444] Taking the first PDCCH, second PDCCH, first PDSCH and second PDSCH as an example where they are all located in the same time slot, the first PDCCH can occupy symbol 0, the second PDCCH can occupy symbol 1, the first PDSCH can occupy symbols 2 to 5, and the second PDSCH can occupy symbols 6 to 9.
[0445] Alternatively, the first PDCCH can occupy symbols 0 to 1, the first PDSCH can occupy symbols 2 to 5, the second PDCCH can occupy symbols 6 to 7, and the second PDSCH can occupy symbols 8 to 11.
[0446] It should be understood that the preceding text uses a PDSCH carrying SIB as an example 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 used to schedule PDSCH carrying OSI, etc.
[0447] 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.
[0448] 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.
[0449] 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.
[0450] Figure 14 is an exemplary block diagram of a communication device provided in an embodiment of this application. As shown in Figure 14, the communication device includes a receiving unit 1410 and a determining unit 1420.
[0451] The communication device 1400 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 communication device functions.
[0452] For example, the receiving unit 1410 is used to receive first information, which indicates that the information carried by the first physical downlink shared channel (PDSCH) is the same as the information carried by the second PDSCH; or, under the condition of satisfying a first condition, it is determined that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, wherein the first condition is related to the position of the first PDSCH and / or the position of the second PDSCH; wherein the system message block (SIB) carried by the first PDSCH is associated with the first synchronization signal block (SSB), and the SIB carried by the second PDSCH is associated with the second SSB; and the determining unit 1420 is used to determine the SIB carried by the first PDSCH based on the first PDSCH and the second PDSCH.
[0453] In some embodiments, the first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0454] In some embodiments, the first field is carried in the first SSB and / or the second SSB, or the first field is carried in an extended master information block.
[0455] In some embodiments, a first PDCCH is used to schedule the first PDSCH, and a second PDCCH is used to schedule the second PDSCH; the first condition includes one of the following: the first PDSCH is detected at the position indicated by the first PDCCH, and the second PDSCH is detected at the position indicated by the second PDCCH; or the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
[0456] In some embodiments, the position indicated by the first PDCCH is a time-domain position, and the position indicated by the second PDCCH is a time-domain position; or, the position indicated by the first PDCCH is a frequency-domain position, and the position indicated by the second PDCCH is a frequency-domain position.
[0457] In some embodiments, the second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
[0458] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource; the first condition includes one of the following: the first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or, the first PDSCH is detected on the first frequency domain resource with a bandwidth of (MN) / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of (MN) / M. Wherein, M and N are both positive integers.
[0459] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB or the first PDCCH.
[0460] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0461] In one possible design, when the communication device 1400 is a terminal or a communication module within a terminal, the function of the determining unit 1420 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 1410 can be implemented by transceiver circuitry.
[0462] In one possible design, when the communication device 1400 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 function of the determining unit 1420 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 1410 can be implemented by the interface circuitry or data transceiver circuitry on the aforementioned chip.
[0463] Figure 15 is another exemplary block diagram of a communication device provided in an embodiment of this application. As shown in Figure 15, the communication device includes a transmitting unit 1510.
[0464] The communication device 1500 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.
[0465] For example, the sending unit 1510 is used to send first information, which indicates that the information carried by the first physical downlink shared channel (PDSCH) is the same as the information carried by the second PDSCH; or, under the condition of satisfying a first condition, it is determined that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, wherein the first condition is related to the position of the first PDSCH and / or the position of the second PDSCH; wherein the system message block (SIB) carried by the first PDSCH is associated with the first synchronization signal block (SSB), and the SIB carried by the second PDSCH is associated with the second SSB.
[0466] In some embodiments, the first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
[0467] In some embodiments, the first field is carried in the first SSB and / or the second SSB, or the first field is carried in an extended master information block.
[0468] In some embodiments, a first PDCCH is used to schedule the first PDSCH, and a second PDCCH is used to schedule the second PDSCH; the first condition includes one of the following: the first PDSCH is detected at the position indicated by the first PDCCH, and the second PDSCH is detected at the position indicated by the second PDCCH; or the first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
[0469] In some embodiments, the position indicated by the first PDCCH is a time-domain position, and the position indicated by the second PDCCH is a time-domain position; or, the position indicated by the first PDCCH is a frequency-domain position, and the position indicated by the second PDCCH is a frequency-domain position.
[0470] In some embodiments, the second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
[0471] In some embodiments, the PDCCH used to schedule the first PDSCH indicates a first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates a second frequency domain resource; the first condition includes one of the following: the first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or, the first PDSCH is detected on the first frequency domain resource with a bandwidth of (MN) / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of (MN) / M. Wherein, M and N are both positive integers.
[0472] In some embodiments, M and / or N are predefined, or M and / or N are carried in the first SSB or the first PDCCH.
[0473] In some embodiments, the information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: the original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, the original bits of the first PDSCH are the same as the original bits of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as the modulation and coding scheme of the second PDSCH.
[0474] In one possible design, when the communication device 1500 is a network device or a communication module in a network device, the function of the transmitting unit 1510 can be implemented by a transceiver circuit.
[0475] In one possible design, when the communication device 1500 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 1510 can be implemented by the interface circuit or data transceiver circuit on the aforementioned chip.
[0476] For details regarding the steps or processes executed by each unit in communication device 1400 or communication device 1500, please refer to the descriptions in the corresponding methods; they will not be elaborated here.
[0477] It should be understood that the "unit" in communication device 1400 or communication device 1500 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.
[0478] Figure 16 is another exemplary block diagram of the communication device provided in an embodiment of this application. The communication device 1600 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.
[0479] The communication device 1600 may include one or more processors 1610, which may also be referred to as processing units, and can implement certain control functions. The processor 1610 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.
[0480] In an alternative design, the processor 1610 may also store instructions and / or data that can be executed by the processor 1610 to cause the communication device 1600 to perform the methods described in the above method embodiments.
[0481] In another alternative design, the communication device 1600 may include a communication interface 1620 for implementing receiving and transmitting functions. For example, the communication interface 1620 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.
[0482] Optionally, the communication device 1600 may include one or more memories 1630, which may store instructions that can be executed on the processor 1610, causing the communication device 1600 to perform the methods described in the above method embodiments. Optionally, the memories 1630 may also store data. Optionally, the processor 1610 may also store instructions and / or data. The processor 1610 and the memories 1630 may be provided separately or integrated together.
[0483] 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.
[0484] 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.
[0485] 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.
[0486] 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.
[0487] 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.
[0488] 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.
[0489] 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.
[0490] 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.
[0491] 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).
[0492] 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.
[0493] 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.
[0494] 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.
[0495] 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.
[0496] 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.
[0497] 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.
[0498] 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.
[0499] 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 by comprising: include: Receive first information, which indicates that the information carried by the first Physical Downlink Shared Channel (PDSCH) is the same as the information carried by the second PDSCH; or, if a first condition is met, determine that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, wherein the first condition is related to the position of the first PDSCH and / or the position of the second PDSCH; wherein the System Message Block (SIB) carried by the first PDSCH is associated with the first Synchronization Signal Block (SSB), and the SIB carried by the second PDSCH is associated with the second SSB; and The SIB carried by the first PDSCH is determined based on the first PDSCH and the second PDSCH.
2. A communication method characterized by comprising: include: Send a first message, which indicates that the information carried by the first physical downlink shared channel (PDSCH) is the same as the information carried by the second PDSCH; or, if a first condition is met, determine that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, wherein the first condition is related to the location of the first PDSCH and / or the location of the second PDSCH; wherein the system message block (SIB) carried by the first PDSCH is associated with the first synchronization signal block (SSB), and the SIB carried by the second PDSCH is associated with the second SSB.
3. The method according to claim 1 or 2, characterized in that, The first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
4. The method according to claim 3, characterized in that, The first field is carried in the first SSB and / or the second SSB, or the first field is carried in the extended master information block.
5. The method according to claim 1 or 2, characterized in that, The first PDCCH is used to schedule the first PDSCH, and the second PDCCH is used to schedule the second PDSCH. The first condition includes one of the following: The first PDSCH is detected at the location indicated by the first PDCCH, and the second PDSCH is detected at the location indicated by the second PDCCH; or The first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
6. The method according to claim 5, characterized in that, The first PDCCH indicates a time-domain location, and the second PDCCH indicates a time-domain location; or, the first PDCCH indicates a frequency-domain location, and the second PDCCH indicates a frequency-domain location.
7. The method according to claim 5 or 6, characterized in that, The second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
8. The method according to claim 1 or 2, characterized in that, The PDCCH used to schedule the first PDSCH indicates the first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates the second frequency domain resource. The first condition includes one of the following: The first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or The first PDSCH was detected on the frequency domain resources with a bandwidth of (MN) / M in the first frequency domain resources, and the second PDSCH was detected on the frequency domain resources with a bandwidth of (MN) / M in the second frequency domain resources. Where M and N are both positive integers.
9. The method according to claim 8, characterized in that, M and / or N are predefined, or M and / or N are carried in the first SSB or the first PDCCH.
10. The method according to any one of claims 1-9, characterized in that, The information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: The original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, The original bits of the first PDSCH are the same as those of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as that of the second PDSCH.
11. A communication device, characterized in that, include: A receiving unit is configured to receive first information, the first information indicating that the information carried by a first Physical Downlink Shared Channel (PDSCH) is the same as the information carried by a second PDSCH; or, if a first condition is met, determining that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, the first condition being related to the position of the first PDSCH and / or the position of the second PDSCH; wherein, the System Message Block (SIB) carried by the first PDSCH is associated with a first Synchronization Signal Block (SSB), and the SIB carried by the second PDSCH is associated with a second SSB; and... The determining unit is configured to determine the SIB carried by the first PDSCH based on the first PDSCH and the second PDSCH.
12. A communication device, characterized in that, include: A transmitting unit is configured to transmit first information, the first information being used to indicate that the information carried by the first physical downlink shared channel (PDSCH) is the same as the information carried by the second PDSCH; or, if a first condition is met, to determine that the information carried by the first PDSCH is the same as the information carried by the second PDSCH, the first condition being related to the position of the first PDSCH and / or the position of the second PDSCH; wherein, the system message block (SIB) carried by the first PDSCH is associated with the first synchronization signal block (SSB), and the SIB carried by the second PDSCH is associated with the second SSB.
13. The apparatus according to claim 11 or 12, characterized in that, The first information is carried in a first field, and the first field has a first value to indicate that the information carried by the first PDSCH is the same as the information carried by the second PDSCH.
14. The apparatus according to claim 13, characterized in that, The first field is carried in the first SSB and / or the second SSB, or the first field is carried in the extended master information block.
15. The apparatus according to claim 11 or 12, characterized in that, The first PDCCH is used to schedule the first PDSCH, and the second PDCCH is used to schedule the second PDSCH. The first condition includes one of the following: The first PDSCH is detected at the location indicated by the first PDCCH, and the second PDSCH is detected at the location indicated by the second PDCCH; or The first PDSCH is detected at a position offset by a second value relative to the position indicated by the first PDCCH, and the second PDSCH is detected at a position offset by a second value relative to the position indicated by the second PDCCH.
16. The apparatus according to claim 15, characterized in that, The first PDCCH indicates a time-domain location, and the second PDCCH indicates a time-domain location; or, the first PDCCH indicates a frequency-domain location, and the second PDCCH indicates a frequency-domain location.
17. The apparatus according to claim 15 or 16, characterized in that, The second value is predefined, or the second value is carried in the first SSB or the first PDCCH.
18. The apparatus according to claim 11 or 12, characterized in that, The PDCCH used to schedule the first PDSCH indicates the first frequency domain resource, and the PDCCH used to schedule the second PDSCH indicates the second frequency domain resource. The first condition includes one of the following: The first PDSCH is detected on the first frequency domain resource with a bandwidth of N / M, and the second PDSCH is detected on the second frequency domain resource with a bandwidth of N / M; or The first PDSCH was detected on the frequency domain resources with a bandwidth of (MN) / M in the first frequency domain resources, and the second PDSCH was detected on the frequency domain resources with a bandwidth of (MN) / M in the second frequency domain resources. Where M and N are both positive integers.
19. The apparatus according to claim 18, characterized in that, M and / or N are predefined, or M and / or N are carried in the first SSB or the first PDCCH.
20. The apparatus according to any one of claims 11-19, characterized in that, The information carried by the first PDSCH is the same as the information carried by the second PDSCH, including: The original bits of the first PDSCH are the same as the original bits of the second PDSCH; or, The original bits of the first PDSCH are the same as those of the second PDSCH, and the modulation and coding scheme of the first PDSCH is the same as that of the second PDSCH.
21. 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 1-10.
22. 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 1-10.