Communication methods and related devices

Abstract

A communication method and related apparatus are disclosed and applied in the field of communication technologies. In an embodiment of the present application, when switching a frequency number, a first node notifies a second node of an operating frequency number switch by using a physical layer control signaling indicating the frequency number switch, where the physical layer control signaling indicating the frequency number switch is scrambled by using a first identifier to distinguish the physical layer control signaling from physical layer signaling of another function. In the above implementation, an instruction for operating frequency number switch is completed by using the first identifier and the physical layer control signaling. Since this shortens the time duration of the frequency number switch, the first node and the second node can switch to the second frequency number as soon as possible to execute communication. This improves the transmission performance of the communication network.

Description

Technical Field

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[0004] , ,

[0001] This application relates to the field of communication technologies, specifically to the field of short - distance communication technologies, for example, communication in scenarios such as smart cars, smart homes, smart terminals, and smart manufacturing, and particularly relates to communication methods and related devices.

Background Art

[0002] There are various types of interference in the wireless communication environment, and some spectrums are shared by multiple different wireless communication technologies. Thus, wireless communication technologies are required to have interference prevention capabilities. When detecting that there is interference or the interference is large at the current operating frequency number, nodes in the wireless communication system can switch the operating frequency number to suppress the influence of interference.

[0003] Communication is usually carried out between multiple nodes. After a node, for example, the first node, decides to switch the operating frequency number, the first node needs to notify another node (for example, at least one second node) that it is communicating with of the operating frequency number switch so that the first node and the nodes communicating with the first node can switch from the current communication operating frequency number to the new operating frequency number to continue communication.

[0004] The frequency number switching process has high time requirements. If the length of the switching process (that is, the interval between the time when it is determined to switch the frequency number and the time when communication starts with the new frequency number of the switching destination) is long, the efficiency of data and / or signaling transmission is low, which affects the transmission performance of the inter - node communication link.

[0005] For example, if the communication of the first node on the first frequency number is interfered with, and the first node detects that the second frequency number is unused, it decides to switch its operating frequency number to the second frequency number. If the switching process is long, another node (for example, a third node) may have already claimed the second frequency number as its operating frequency number. Even after the first node has switched its operating frequency number to the second frequency number, the first node's communication on the second frequency number may still be affected by interference from the third node, impacting the transmission performance of the communication link.

[0006] In another example, if the switching process is long, the first node will have to continue communicating on the interfered frequency number for an extended period, degrading the transmission performance of the communication link. [Overview of the project] [Means for solving the problem]

[0007] Embodiments of this application provide a communication method and related apparatus for improving the transmission performance of an inter-node communication link by shortening the time duration of frequency number switching.

[0008] According to a first aspect, one embodiment of the present application provides a communication method. The method includes the following:

[0009] The first node sends higher layer signaling, and the higher layer signaling includes the first identifier. A first node transmits a first physical layer control signaling at a certain operating frequency number, some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier, the operating frequency number being the first frequency number, and the first physical layer control signaling indicates a switch in the operating frequency number of the first node to a second frequency number.

[0010] Optionally, a node receiving higher-layer signaling and first physical layer control signaling may be a second node. This is illustrated below using an example where the receiving end is a second node. There may be one or more second nodes. Higher-layer signaling includes, but is not limited to, X resource control (XRC) setup signaling, XRC reconfiguration signaling, or system messages.

[0011] In this embodiment of the present application, the first node pre-notifies the second node of the first identifier by using higher-layer signaling, and the first identifier is used to scramble the physical layer control signaling indicating frequency number switching so that the physical layer control signaling indicating frequency number switching can be distinguished from the signaling of another function, or so that the function group in which the physical layer control signaling indicating frequency number switching is located can be distinguished from another function group.

[0012] After deciding to switch the frequency number, the first node transmits a first physical layer control signaling that is scrambled using a first identifier, and the first physical layer control signaling indicates a switch in the operating frequency number to a second frequency number. If the second node can descramble the first physical layer control signaling using the first identifier, the second node can acquire the functionality of the first physical layer control signaling, acquire the data content of the first physical layer control signaling based on the data format of the first physical layer control signaling, and thus receive the instruction to switch the operating frequency number.

[0013] By using physical layer signaling to indicate an operating frequency number switch, the interval between the time the switch is decided and the time the signal is transmitted can be substantially shortened, thereby reducing the switch time. The main reasons are as follows: Firstly, higher-layer signaling must be scheduled and transmitted using physical layer signaling, and this only occurs after the signaling receiving node has been scheduled by using physical layer signaling to transmit the signaling confirmation, requiring a complex process and a long time to become effective, whereas physical layer signaling can be transmitted directly and can become effective in a short time after being received by the receiver. Secondly, some higher-layer signaling (such as system messages) only have one transmission opportunity over a long period, which is generally tens to hundreds of milliseconds, while physical layer signaling has many transmission opportunities, generally more than once every millisecond. Therefore, by using physical layer signaling to indicate a frequency number switch, the interval between the time the frequency number switch is decided and the time when the corresponding signaling can be transmitted is shortened.

[0014] In conclusion, in this embodiment of the present application, a first identifier is used to scramble physical layer control signaling indicating frequency number switching, and the first identifier and physical layer control signaling are used to complete the instruction for operating frequency number switching. This shortens the time length of frequency number switching so that the first node can switch to the second frequency number as quickly as possible for communication, improving the efficiency of data and / or signaling transmission and improving the transmission performance of the inter-node communication link.

[0015] In some scenarios, scrambling refers to obtaining a new signal based on the original signal and the scrambling code. The reverse operation of scrambling is descrambling.

[0016] Since the first identifier is used in the signaling scrambling process, the encoding (or decoding) scheme used for the first physical layer control signaling can be the same as the encoding (or decoding) scheme for the other signalings. This configuration further reduces the time for frequency number switching without increasing the decoding time at the receiving end, and does not significantly increase the complexity of blind detection of the physical layer signaling by the receiving end when the receiving end needs to additionally blindly detect the physical layer signaling for carrier switching.

[0017] In another possible implementation of the first embodiment, the first identifier corresponds to a frequency number switching function. In this implementation, the second node can distinguish the function of the first physical layer control signaling after descrambling the first physical layer control signaling by using the first identifier. This speeds up the acquisition of the operating frequency number switching instruction by the second node, so that the second node can switch to the new operating frequency number as quickly as possible to communicate with the first node and improve the transmission performance of the link.

[0018] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes a function indicator field, which indicates that the first identifier corresponds to a frequency number switching function. In this implementation, after descrambling the first physical layer control signaling using the first identifier to obtain the function indicator field, the second node can distinguish the functions of the first physical layer control signaling. Specifically, the first identifier may correspond to a group of signaling function types (including one or more signaling function types), and the signaling functions within the group of signaling function types can be distinguished by using the function indicator field in the signaling. This improves the flexibility and extensibility of the first identifier.

[0019] In yet another possible implementation of the first embodiment, some information bits in the first physical layer control signaling include a cyclic redundancy check (CRC) code for the first physical layer control signaling. In this implementation, the CRC code for the first physical layer control signaling is scrambled by using a first identifier to distinguish it from physical layer signaling of another function. This implementation may be used to further reduce the time length of frequency number switching without increasing the decoding time of the second node.

[0020] In yet another possible implementation of the first embodiment, the resources for transmitting the first physical layer control signaling belong to a pre-configured physical layer control signaling common resource.

[0021] A physical layer control signaling common resource (or common resource) is a resource that can be shared by multiple second nodes for detecting physical layer control signaling, and may include, but is not limited to, time-frequency resources. Since the second nodes detect (or listen to) the signaling on the common resource, the nodes on which the common resource is configured can receive the first physical layer control signaling. Therefore, the first node does not need to notify other nodes of frequency number switching one by one. This shortens the time duration of frequency number switching.

[0022] Considering possible scenarios, there could be multiple second nodes. For example, in SparkLink Basic (SLB) technology, a single communication domain could contain up to 4096 second nodes. In this case, notifying the second nodes of a frequency number switch one by one is time-consuming for the first node. This time-consuming notification prevents the first node from switching to the new frequency number as quickly as possible, and the second nodes may not receive the frequency number switch instruction in time. As a result, the transmission performance of the communication links between nodes is poor.

[0023] In the implementation described above, the first node transmits the first physical layer control signaling over a common resource, and at least one second node blindly detects the physical layer control signaling over the common resource for transmitting the physical layer control signaling in order to obtain frequency number switching instructions. This significantly reduces the time required to notify of frequency number switching, allowing the second node to switch to the second frequency number as quickly as possible to communicate on the first frequency number, thereby improving transmission performance.

[0024] In yet another possible implementation of the first embodiment, the method further includes the first node communicating with at least one second node on a second frequency number. Optionally, this operation is performed after the first physical layer control signaling has been transmitted.

[0025] In yet another possible implementation of the first embodiment, the superframe sequence numbers of the first and second superframes are consecutive, the first superframe is the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe is the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node has been switched from the first frequency number to the second frequency number.

[0026] In other words, the superframe sequence numbers of the superframe are consecutive before and after the operating frequency number switch. The above implementation can guarantee that transmissions are logically consecutive. Scheduling prior to the operating frequency number switch can continue to be used after the switch without reconfiguration or rescheduling. This significantly reduces the impact of the operating frequency number switch on the communication process and improves transmission performance.

[0027] The configuration includes the configuration of time-frequency resources, for example, the resources reserved for transmitting data / signaling. Scheduling includes resource allocation. For example, the first node transmits scheduling signaling in the Nth superframe, and the scheduling indicated by the scheduling signaling is performed in the (N + 1)th superframe. When the superframe numbers are consecutive, the scheduling signaling transmitted in a superframe before the operating frequency number switching may continue to be valid in the superframe after the operating frequency number switching, and the scheduling signaling does not need to be transmitted again.

[0028] In yet another possible implementation of the first aspect, the interval between the instant at the end of the first superframe and the instant at the start of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0029] Optionally, the length of the superframe is 1 ms and the period of the synchronization signal is 1 ms. Further, since the position of the synchronization signal is usually at a fixed time position in the superframe, the period of the synchronization signal is the same as the length of the superframe.

[0030] Since the interval between the instant at the end of the last superframe used by the first node for transmission at the operating frequency number and the instant at the start of the first superframe for transmission at the destination frequency is 0 or a positive integer millisecond, the superframe boundary and the position of the synchronization signal do not change in the operating frequency number switching process. This has a simpler implementation form of reducing the change of configuration parameters and synchronizing the timing between the first node and the second node.

[0031] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes one or more of the following pieces of information: a second frequency number identifier, a superframe sequence number continuity indicator, a frequency number switching moment indicator, a reaccess indicator, a switching interval indicator, or a preamble indicator.

[0032] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes a second frequency number identifier. The second frequency number identifier indicates the destination frequency number for switching and includes, but is not limited to, a frequency number sequence number, a frequency number index number, or a channel number.

[0033] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes a superframe sequence number continuity indicator, which indicates whether it is guaranteed that the superframe sequence numbers of the first superframe and the second superframe are continuity.

[0034] The superframe sequence number continuity instruction can indicate to a second node the effect of operating frequency number switching on the superframe sequence number and scheduling, so that the second node implements the corresponding configuration. This improves the transmission performance of the communication link.

[0035] In one possible design, when the sixth value is, the superframe Sequence number The continuity instruction indicates that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are not guaranteed to be consecutive. In this case, scheduling performed before the operating frequency number switch is invalid at the second frequency number, and the first node must determine the scheduling again.

[0036] In one possible design, when the value is 7, the superframe Sequence number The continuity instruction indicates that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are consecutive. In this case, scheduling performed before the operating frequency number switch is valid at the second frequency number, and rescheduling is not required. This shortens the switching time.

[0037] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes an indication of a moment of frequency number switching. The indication of a moment of switching indicates an opportunity to switch the operating frequency number.

[0038] In one possible configuration, the indication of the moment of frequency number switching would indicate the opportunity for the first node to begin switching the operating frequency number, for example, indicating the superframe sequence number of the last subframe used by the first node for transmission at the current operating frequency number, or indicating the relative offset of the last superframe used by the first node for transmission at the current operating frequency number to the superframe for transmitting the first physical layer control signaling.

[0039] In another possible configuration, the indication of the frequency number switching moment would indicate the start moment when transmission begins at the second frequency number, for example, the superframe sequence number of the first superframe used by the first node for transmission at the second frequency number, or the relative offset of the start moment of the first superframe used by the first node for transmission at the second frequency number to the start moment of the superframe for transmitting the first physical layer control signaling.

[0040] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0041] In yet another possible implementation of the first embodiment, the second node can determine an opportunity to switch the operating frequency number based on the moment of frequency number switching.

[0042] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes a reaccess instruction. The reaccess instruction is instructional information indicating whether a second node needs to perform reaccess.

[0043] In the frequency number switching process, the second node may need to perform a reaccess operation in some cases, and may not need to in other cases. Reaccess instructions are carried in the first physical layer control signaling to flexibly regulate and control the behavior of the second node. This can improve the flexibility and stability of the communication system.

[0044] In some possible scenarios, a reaccess instruction would instruct the second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration would remain unchanged, or be changed only slightly, or only changes would be made to communication domain system configurations that do not affect the current transmission scheduling (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration). This avoids reaccess by the second node, reduces the excessive time consumption caused by reaccess, and avoids invalidating the current scheduling. This environment can reduce service disruptions caused by frequency number switches and improve transmission performance.

[0045] In some possible scenarios, the first node may adjust communication system parameters, such as cyclic prefix (CP) length and resource ratio, based on the channel status and / or current service requirements of the second frequency number. When the second node re-accesses the first node, it is easier to activate the changes in communication parameters, and the first node may instruct the second node to perform the re-access. This improves the stability of communication between the second and first nodes.

[0046] In yet another possible implementation of the first embodiment, when the first value is present, the reaccess instruction instructs a second node to perform an access operation at a second frequency number. For example, the access operation includes sending an access request.

[0047] Access methods can include contention access and contention-free access.

[0048] In yet another possible implementation of the first embodiment, when the value is second, the reaccess instruction instructs the second node to maintain the current access state or not to perform the access operation.

[0049] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes a switching interval instruction, which indicates the time interval between the last superframe for transmission at a first frequency number (i.e., the first superframe) and the first superframe for transmission at a second frequency number (i.e., the second superframe). The switching interval between superframes can be flexibly set by using the switching interval instruction. This satisfies the requirement that the device has the capability to switch between different frequency numbers.

[0050] Optionally, the switching interval instruction may include one or more time intervals such as the time interval between the end of the first superframe and the start of the second superframe, the time interval between the start of the first superframe and the start of the second superframe, the time interval between the end of the first superframe and the end of the second superframe, and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0051] In one possible implementation, when the first node transmits preamble information at the second frequency number, the switching interval may include one or more of the following: the time interval between the end of the first superframe and the beginning of the preamble information, the time interval between the beginning of the first superframe and the beginning of the preamble information, and so on.

[0052] In yet another possible implementation of the first embodiment, the second node may modify the communication configuration based on a switching interval instruction to improve communication stability. For example, the second node may determine, based on a time interval, the time to start transmission in the superframe after the switch, the position of the synchronization signal, and so on.

[0053] In yet another possible implementation of the first embodiment, the switching interval instruction further indicates whether the first node transmits preamble information at the second frequency number.

[0054] Furthermore, if the switching interval indicates that the first node transmits preamble information at the second frequency number, the second node correspondingly receives preamble information at the second frequency number. Conversely, if the switching interval indicates that the first node does not transmit preamble information at the second frequency number, the second node does not need to receive preamble information at the second frequency number. It can be seen that the switching interval instruction can be used to flexibly regulate and control the behavior of the second node. This can improve the stability of the communication system.

[0055] Preamble information is the initial fragment of information transmitted before a transmission is performed in a superframe on a second frequency number after a frequency number switch. Optionally, preamble information may indicate changes in configuration information, such as changes in the random access resource pool configuration and the channel sounding reference signal (SRS) resource pool configuration.

[0056] Optionally, preamble information may be used by the receiving node to synchronously acquire channel information, for example, for channel estimation and channel quality assessment. That is, a second node may perform synchronization based on the preamble information and / or acquire channel information based on the preamble information.

[0057] In some possible implementations, the content of the preamble information may be predetermined or pre-configured.

[0058] In yet another possible implementation of the first embodiment, the first node does not transmit preamble information at the second frequency number. This reduces the switching time spent by shortening the interval between the last superframe before the switch and the first superframe after the switch.

[0059] In yet another possible implementation of the first embodiment, the method further includes the following:

[0060] When the switching interval instruction is greater than the third value, the first node transmits preamble information with the second frequency number.

[0061] Optionally, when the switching interval instruction is less than the third value, the first node does not transmit preamble information at the second frequency number.

[0062] Switching interval instructions It should be understood that when is equal to the third value, the first node does not have to transmit preamble information at the second frequency number, or does not have to transmit preamble information at all.

[0063] In one possible design, if the switching interval instruction is greater than or equal to a third value, the first node transmits preamble information at the second frequency number. Alternatively, if the switching interval instruction is less than a third value, the first node does not transmit preamble information at the second frequency number.

[0064] In another possible design, if the switching interval instruction is greater than a third value, the first node transmits preamble information at the second frequency number. Alternatively, if the switching interval instruction is less than or equal to the third value, the first node does not transmit preamble information at the second frequency number.

[0065] In yet another possible implementation of the first embodiment, when the switching interval instruction is 0, the first node does not transmit preamble information at the second frequency number. Or, when the switching interval instruction is greater than 0, the first node transmits preamble information at the second frequency number.

[0066] In yet another possible implementation of the first embodiment, the first physical layer control signaling includes a preamble instruction, which indicates that the first node will transmit preamble information at a second frequency number, or that the first node will not transmit preamble information at a second frequency number. The preamble instruction can be used to flexibly regulate and control the behavior of the second node, which can improve the stability of the communication system.

[0067] Optionally, when the preamble instruction is the fourth value, the first node transmits preamble information at the second frequency number.

[0068] Optionally, when the preamble instruction is the fifth value, the first node does not transmit preamble information at the second frequency number.

[0069] In yet another possible implementation of the first embodiment, when the switching interval indicates whether preamble information is transmitted, the first physical layer control signaling does not need to carry additional preamble instructions to reduce the fields in the physical layer control signaling.

[0070] In yet another possible implementation of the first embodiment, the first identifier may be used in multiple frequency number switching processes. That is, after the first node transmits the first identifier to the second node, in subsequent multiple operational frequency number switching processes, the physical layer control signaling indicating the frequency number switching may be scrambled by using the same first identifier. After the first identifier is configured using higher layer signaling, the frequency number switching may be indicated by using a single physical layer control signaling. This further reduces signaling interaction in the frequency number switching process and further shortens the time length of the frequency number switching, so that the first node can switch to the second frequency number for communication as quickly as possible, improving the transmission performance of the communication network.

[0071] In yet another possible implementation of the first embodiment, the method includes the following:

[0072] The first node transmits a second physical layer control signaling at a certain operating frequency number, the second physical layer control signaling indicates a switch in the operating frequency number to a third frequency number, some or all of the information bits in the second physical layer control signaling are scrambled using the first identifier, the operating frequency number being the second frequency number.

[0073] In the implementation described above, when switching the operating frequency number to a third frequency number, the first node can indicate the frequency number switch by using a single physical layer control signaling. This shortens the time duration of the frequency number switch and improves the transmission performance of the communication network.

[0074] In yet another possible implementation of the first embodiment, the method further includes the following:

[0075] The first node receives frequency number capability information from at least one second node, the frequency number capability information including one or more of the supported frequency numbers, supported switching intervals, etc.

[0076] Optionally, the second frequency number belongs to the frequency numbers supported by the second frequency number.

[0077] In yet another possible implementation of the first embodiment, the method further includes the following:

[0078] The first node may determine the switching interval based on frequency number capability information reported by at least one second node. In this way, the first node can flexibly configure the switching interval so that it can match the switching capabilities of the first and second nodes, shorten the switching interval as much as possible, and reduce the excessive delay caused by frequency number switching.

[0079] In yet another possible implementation of the first embodiment, the first physical layer control signaling is transmitted in a broadcast and / or multicast manner.

[0080] In this implementation, the first node may notify at least one second node of the frequency number switch via a single broadcast or multicast, and does not need to notify each second node individually. This significantly reduces the time required to notify of the frequency number switch, so the second node does not need to notify the first node Switch to the second frequency number as quickly as possible to communicate and improve transmission performance.

[0081] In yet another possible implementation of the first embodiment, the second node does not send feedback indicating whether it has successfully detected the first physical layer control signaling. Reducing the signaling interaction can further shorten the frequency-time switching duration.

[0082] In yet another possible implementation of the first embodiment, the first node transmits multiple physical layer control signalings separately across multiple superframes to indicate the same frequency number switch. Since the first node repeatedly transmits the same frequency number switch signaling multiple times, the second node has multiple opportunities to detect the signaling. This reduces the probability of frequency number switch failure, as the second node may not detect the signaling.

[0083] In yet another possible implementation of the first embodiment, the first node transmitting a first physical layer control signaling at a certain operating frequency number includes the first node transmitting a first physical layer control signaling in a third superframe at a certain operating frequency number, where the operating frequency number is the first frequency number.

[0084] The method further comprises the first node transmitting a third physical layer control signaling in a fourth superframe at a certain operating frequency number, wherein some or all of the information bits in the third physical layer control signaling are scrambled using a first identifier, the operating frequency number is the first frequency number, and the third physical layer control signaling indicates a switch of the first node's operating frequency number to a second frequency number.

[0085] It can be seen that both the first and third physical layer control signaling are scrambled using the first identifier, indicating a switch in the operating frequency number to the second frequency number. Accordingly, the second node can obtain the frequency number switching instruction as long as it detects either the first or third physical layer control signaling. Therefore, using the above implementation, the probability of frequency number switching failure is reduced because the second node does not detect the signaling, and transmission performance can be improved.

[0086] In yet another possible implementation of the first embodiment, the first physical layer control signaling belongs to one of a plurality of physical layer control signalings, the plurality of physical layer control signalings further includes a fourth physical layer control signaling, and the length of the first physical layer control signaling is the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from the function of the fourth physical layer control signaling.

[0087] In the implementation described above, the bit length of the first physical layer control signaling is the same as the bit length of another type of physical layer control signaling that indicates a different function. In other words, the bit length of the first physical layer control signaling belongs to the existing bit length. By not adding a new bit length, the time for decoding signaling during blind detection of the second node can be reduced, and the time length for frequency number switching can be shortened.

[0088] According to a second aspect, one embodiment of the present application provides a communication method. This method includes:

[0089] The second node receives higher layer signaling from the first node, and the higher layer signaling includes the first identifier. A second node receives a first physical layer control signaling at a certain operating frequency number, and some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier, and the operating frequency number is the first frequency number. The first physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number.

[0090] In another possible implementation of the second aspect, the first identifier corresponds to the frequency number switching function.

[0091] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes a function indicator field, the function indicator field indicating that the first identifier corresponds to a frequency number switching function.

[0092] In yet another possible implementation of the second embodiment, some of the information bits in the first physical layer control signaling include a cyclic redundancy check (CRC) code for the first physical layer control signaling.

[0093] In yet another possible implementation of the second embodiment, the resources for transmitting the first physical layer control signaling belong to a pre-configured physical layer control signaling common resource.

[0094] In yet another possible implementation of the second aspect, the method further includes the following:

[0095] The second node descrambles some or all of the information bits in the first physical layer control signaling by using the first identifier. The second node communicates with the first node using the second frequency number.

[0096] It should be understood that when all information bits in the first physical layer control signaling are scrambled using the first identifier, the second node descrambles all information bits in the first physical layer control signaling using the first identifier.

[0097] When some information bits in the first physical layer control signaling are scrambled using the first identifier, the second node descrambles some information bits in the first physical layer control signaling using the first identifier.

[0098] In yet another possible implementation of the second aspect, the superframe sequence numbers of the first and second superframes are consecutive, the first superframe is the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe is the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node has been switched from the first frequency number to the second frequency number.

[0099] In other words, the superframe sequence numbers of the superframe are consecutive before and after the switching of the operating frequency number.

[0100] In yet another possible implementation of the second aspect, the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0101] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes one or more of the following pieces of information: a second frequency number identifier, a superframe sequence number continuity indicator, a frequency number switching moment indicator, a reaccess indicator, a switching interval indicator, or a preamble indicator.

[0102] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes a second frequency number identifier. The second frequency number identifier indicates the destination frequency number for switching and includes, but is not limited to, a frequency number sequence number, a frequency number index number, or a channel number.

[0103] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes a superframe sequence number continuity indicator, which indicates whether it is guaranteed that the superframe sequence numbers of the first superframe and the second superframe are continuity.

[0104] In one possible design, when the sixth value is, the superframe Sequence number The continuity instruction indicates that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are not guaranteed to be consecutive. In this case, scheduling performed before the operating frequency number switch is invalid at the second frequency number, and the first node must determine the scheduling again.

[0105] In one possible design, when the value is 7, the superframe Sequence number The continuity instruction indicates that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are consecutive. In this case, scheduling performed before the operating frequency number switch is valid at the second frequency number, and rescheduling is not required. This shortens the switching time.

[0106] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes an indication of the moment of frequency number switching. The indication of the moment of switching indicates an opportunity to switch the operating frequency number.

[0107] In one possible configuration, the indication of the frequency number switching moment indicates the moment when the first node begins switching the operating frequency number, for example, indicating the superframe sequence number of the last subframe used by the first node for transmission at the current operating frequency number, or indicating the relative offset of the last superframe used by the first node for transmission at the current operating frequency number to the superframe for transmitting the first physical layer control signaling.

[0108] In another possible configuration, the indication of the frequency number switching moment would indicate the start moment when transmission begins at the second frequency number, for example, the superframe sequence number of the first superframe used by the first node for transmission at the second frequency number, or the relative offset of the start moment of the first superframe used by the first node for transmission at the second frequency number to the start moment of the superframe for transmitting the first physical layer control signaling.

[0109] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0110] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes a reaccess instruction. The reaccess instruction is instructional information indicating whether a second node needs to perform reaccess.

[0111] In some possible scenarios, a reaccess instruction would instruct a second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration would remain unchanged, or be changed only slightly, or only changes would be made to communication domain system configurations that do not affect the scheduling of the current transmission (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration). This avoids reaccessing the second node and prevents the invalidation of the current scheduling.

[0112] In yet another possible implementation of the second aspect, when the value is the first, the reaccess instruction instructs the second node to perform an access action. The access action may include one or more of the following: sending an access request, determining a communication key, determining a security context, etc.

[0113] In yet another possible implementation of the second aspect, when the value is second, the reaccess instruction instructs the second node to maintain the current access state or not to perform the access operation.

[0114] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes a switching interval instruction, the switching interval indicating the time interval between the first superframe and the second superframe.

[0115] Optionally, the switching interval can be set to the following time intervals, i.e. This may include one or more of the following: the time interval between the end of the first superframe and the start of the second superframe; the time interval between the start of the first superframe and the start of the second superframe; the time interval between the end of the first superframe and the end of the second superframe; and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0116] In yet another possible implementation of the second embodiment, the switching interval instruction further indicates whether the first node transmits preamble information at the second frequency number. Correspondingly, the second node determines, based on the switching interval instruction, whether the first node transmits preamble information at the second frequency number.

[0117] Furthermore, if the switching interval indicates that the first node will transmit preamble information at the second frequency number, the second node will receive preamble information at the second frequency number accordingly. Alternatively, if the switching interval indicates that the first node will not transmit preamble information at the second frequency number, the second node will not need to receive preamble information at the second frequency number.

[0118] In yet another possible implementation of the second aspect, the method further includes the following:

[0119] When the switching interval instruction is greater than the third value, the second node receives preamble information from the first node at the second frequency number.

[0120] In yet another possible implementation of the second aspect, when the switching interval indicator is 0, the switching interval indicator indicates that the first node does not transmit preamble information at the second frequency number, or when the switching interval indicator is greater than 0, the second node receives preamble information from the first node at the second frequency number.

[0121] In yet another possible implementation of the second embodiment, the first physical layer control signaling includes a preamble instruction, which indicates that the first node will transmit preamble information at a second frequency number, or that the first node will not transmit preamble information at a second frequency number.

[0122] Optionally, when the preamble indication is the fourth value, the second node receives preamble information from the first node at the second frequency number.

[0123] In yet another possible implementation of the second embodiment, the switching interval indicates whether preamble information is transmitted, and the first physical layer control signaling does not need to carry additional preamble instructions.

[0124] In yet another possible implementation of the second embodiment, the first identifier may be used in multiple frequency number switching processes.

[0125] In yet another possible implementation of the second aspect, the method further includes the following:

[0126] The second node receives a second physical layer control signaling from the first node at a certain operating frequency number, the second physical layer control signaling indicating a switch in the operating frequency number to a third frequency number, some information bits in the second physical layer control signaling are scrambled using the first identifier, and the operating frequency number is the second operating frequency number.

[0127] In yet another possible implementation of the second aspect, the method further includes the following:

[0128] The second node transmits its frequency number capability information to the first node, and the second node's frequency number capability information indicates the frequency numbers supported by the second node.

[0129] Optionally, the second frequency number belongs to the frequency numbers supported by the second frequency number.

[0130] Optionally, frequency number capability information is used to determine the switching interval.

[0131] In yet another possible implementation of the second aspect, the first physical layer control signaling is transmitted in a broadcast and / or multicast manner.

[0132] In yet another possible implementation of the second aspect, the second node does not send feedback indicating whether it has successfully detected the first physical layer control signaling. This can reduce signaling interaction, shorten the time duration of frequency number switching, and improve transmission efficiency.

[0133] In yet another possible implementation of the second aspect, the second node receiving the first physical layer control signaling at a certain operating frequency number includes the following:

[0134] The second node receives the first physical layer control signaling in the third superframe at a certain operating frequency number, and the operating frequency number is the first frequency number.

[0135] The method further comprises a second node receiving a third physical layer control signaling in a fourth superframe at a certain operating frequency number, wherein some or all of the information bits in the third physical layer control signaling are scrambled using a first identifier such that the operating frequency number is the first frequency number, and the third physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number.

[0136] In yet another possible implementation of the second embodiment, the first physical layer control signaling belongs to one of a plurality of physical layer control signalings, the plurality of physical layer control signalings further includes a fourth physical layer control signaling, and the length of the first physical layer control signaling is the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from the function of the fourth physical layer control signaling.

[0137] In the implementation described above, the bit length of the first physical layer control signaling is the same as the bit length of another type of physical layer control signaling that indicates a different function. In other words, the bit length of the first physical layer control signaling belongs to the existing bit length.

[0138] According to a third aspect, one embodiment of the present application provides a communication device. The communication device is configured to implement a method described in either the first aspect or one of the possible implementations of the first aspect.

[0139] In a possible implementation of the third embodiment, the communication device includes a first communication unit and a second communication unit.

[0140] In another possible implementation of the third aspect, the first communication unit is configured to transmit higher layer signaling, the higher layer signaling includes a first identifier, A second communication unit is configured to transmit a first physical layer control signaling at a certain operating frequency number, some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier, the operating frequency number is the first frequency number, and the first physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number.

[0141] Optionally, the communication device is the first node, or the communication device is a module (e.g., a chip, integrated circuit, or software module) within the first node.

[0142] In one possible implementation of the third aspect, the first identifier corresponds to the frequency number switching function.

[0143] In another possible implementation of the third embodiment, the first physical layer control signaling includes a function indicator field, the function indicator field indicating that the first identifier corresponds to a frequency number switching function.

[0144] In yet another possible implementation of the third aspect, some of the information bits in the first physical layer control signaling include a cyclic redundancy check (CRC) code for the first physical layer control signaling.

[0145] In yet another possible implementation of the third aspect, the resources for transmitting the first physical layer control signaling belong to a pre-configured physical layer control signaling common resource.

[0146] In yet another possible implementation of the third embodiment, the communication device further includes a third communication unit, the third communication unit configured to communicate with at least one second node on a second frequency number.

[0147] In yet another possible implementation of the third aspect, the superframe sequence numbers of the first and second superframes are consecutive, the first superframe is the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe is the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node has been switched from the first frequency number to the second frequency number.

[0148] In other words, the superframe sequence numbers of the superframe are consecutive before and after the switching of the operating frequency number.

[0149] In yet another possible implementation of the third aspect, the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0150] In yet another possible implementation of the third aspect, the first physical layer control signaling includes one or more of the following pieces of information: a second frequency number identifier, a superframe sequence number continuity indicator, a frequency number switching moment indicator, a reaccess indicator, a switching interval indicator, or a preamble indicator.

[0151] In yet another possible implementation of the third aspect, the first physical layer control signaling includes a second frequency number identifier. The second frequency number identifier indicates the destination frequency number for switching and includes, but is not limited to, a frequency number sequence number, a frequency number index number, or a channel number.

[0152] In yet another possible implementation of the third embodiment, the first physical layer control signaling includes a superframe sequence number continuity indicator, which indicates whether it is guaranteed that the superframe sequence numbers of the first superframe and the second superframe are continuity.

[0153] In one possible design, when the sixth value is, the superframe Sequence number The continuity instruction indicates that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are not guaranteed to be consecutive.

[0154] In one possible design, when the value is 7, the superframe Sequence number The continuity indication shows that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are consecutive.

[0155] In yet another possible implementation of the third embodiment, the first physical layer control signaling includes an indication of the moment of frequency number switching. The indication of the moment of switching indicates an opportunity to switch the operating frequency number.

[0156] In one possible configuration, the indication of the frequency number switching moment indicates the moment when the first node begins switching the operating frequency number, for example, the superframe sequence number of the last superframe used by the first node for transmission at the current operating frequency number, or the relative offset of the last superframe used by the first node for transmission at the current operating frequency number to the superframe for transmitting the first physical layer control signaling.

[0157] In another possible configuration, the indication of the frequency number switching moment would indicate the starting moment when transmission begins at the second frequency number, for example, the superframe sequence number of the first superframe used by the first node for transmission at the second frequency number, or the relative offset of the starting moment of the first superframe used by the first node for transmission at the second frequency number to the starting moment of the superframe for transmitting the first physical layer control signaling.

[0158] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0159] In yet another possible implementation of the third aspect, the first physical layer control signaling includes a reaccess instruction. The reaccess instruction is instructional information indicating whether a second node needs to perform reaccess.

[0160] In some possible scenarios, a reaccess instruction would tell the second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration would remain unchanged, or be changed only slightly, or only changes to communication domain system configurations that do not affect the current transmission scheduling (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration) would be changed. This avoids reaccessing the second node and prevents the current scheduling from being invalidated.

[0161] In yet another possible implementation of the third aspect, when the first value is present, the reaccess instruction instructs the second node to perform an access operation at the second frequency number.

[0162] In yet another possible implementation of the third aspect, when the value is second, the reaccess instruction instructs the second node to maintain the current access state or not to perform the access operation.

[0163] In yet another possible implementation of the third embodiment, the first physical layer control signaling includes a switching interval instruction, the switching interval indicating the time interval between the first superframe and the second superframe.

[0164] Optionally, the switching interval can be set to the following time intervals, i.e. This may include one or more of the following: the time interval between the end of the first superframe and the start of the second superframe; the time interval between the start of the first superframe and the start of the second superframe; the time interval between the end of the first superframe and the end of the second superframe; and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0165] In yet another possible implementation of the third embodiment, the switching interval instruction further indicates whether the communication device transmits preamble information at a second frequency number.

[0166] In yet another possible implementation of the third aspect, the communication device does not transmit preamble information on the second frequency number. This shortens the interval between the last superframe before the switch and the first superframe after the switch, thereby reducing the switching time spent.

[0167] In yet another possible implementation of the third embodiment, the communication device further includes a third communication unit, the third communication unit is When the switching interval instruction is greater than the third value, the system is configured to transmit preamble information at the second frequency number.

[0168] Optionally, when the switching interval instruction is less than the third value, the communication device does not transmit preamble information at the second frequency number.

[0169] When the switching interval is equal to the third value, the communication device does not need to transmit preamble information at the second frequency number, or does not need to transmit preamble information at all; it should be understood that this depends on the specific implementation.

[0170] In yet another possible implementation of the third embodiment, when the switching interval instruction is 0, the communication device does not transmit preamble information at the second frequency number, or when the switching interval instruction is greater than 0, the communication device transmits preamble information at the second frequency number.

[0171] In yet another possible implementation of the third embodiment, the first physical layer control signaling includes a preamble instruction, which indicates that the first node will transmit preamble information at a second frequency number, or that the first node will not transmit preamble information at a second frequency number.

[0172] Optionally, the communication device includes a third communication unit, which is configured to transmit preamble information at a second frequency number when the preamble indication is a fourth value.

[0173] Optionally, when the preamble indication is the fifth value, the communication device does not transmit preamble information on the second frequency number.

[0174] In yet another possible implementation of the third embodiment, the first physical layer control signaling does not need to carry additional preamble instructions when the switching interval indicates whether preamble information is to be transmitted.

[0175] In yet another possible implementation of the third aspect, the first identifier may be used in multiple frequency number switching processes. That is, after the communication device transmits the first identifier to the second node, in subsequent multiple operating frequency number switching processes, signaling indicating frequency number switching may be scrambled by using the same first identifier.

[0176] In yet another possible implementation of the third embodiment, the second communication unit further comprises: The system is configured to transmit a second physical layer control signaling at a certain operating frequency number, the second physical layer control signaling indicating a switch of the operating frequency number to a third frequency number, some or all of the information bits in the second physical layer control signaling are scrambled by using a first identifier, the operating frequency number being the second frequency number.

[0177] In yet another possible implementation of the third embodiment, the communication device further includes a fourth communication unit, the fourth communication unit configured to receive frequency number capability information of at least one second node, the frequency number capability information including one or more of supported frequency numbers, supported switching intervals, etc.

[0178] Optionally, the second frequency number belongs to the frequency numbers supported by the second frequency number.

[0179] In yet another possible implementation of the third embodiment, the communication device further includes a processing unit configured to determine a switching interval based on frequency number capability information reported by at least one second node.

[0180] In yet another possible implementation of the third aspect, the first physical layer control signaling is transmitted in a broadcast and / or multicast manner.

[0181] In yet another possible implementation of the third embodiment, the communication device transmits multiple physical layer control signalings separately in multiple superframes to indicate the same frequency number switching.

[0182] In yet another possible implementation of the third embodiment, the second communication unit further comprises: The first physical layer control signaling is transmitted in the third superframe at the operating frequency number, and the operating frequency number is the first frequency number. The system is configured to transmit a third physical layer control signaling in the fourth superframe at an operating frequency number, with some or all of the information bits in the third physical layer control signaling scrambled using a first identifier, where the operating frequency number is the first frequency number and the third physical layer control signaling indicates a switch of the operating frequency number of the first node to the second frequency number.

[0183] In yet another possible implementation of the third embodiment, the first physical layer control signaling belongs to one of a plurality of physical layer control signalings, the plurality of physical layer control signalings further includes a fourth physical layer control signaling, and the length of the first physical layer control signaling is the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from the function of the fourth physical layer control signaling.

[0184] According to a fourth aspect, one embodiment of the present application provides a communication device. The communication device is configured to implement a method described in either the first aspect or one of the possible implementations of the first aspect.

[0185] In one possible implementation of the fourth aspect, the communication device includes a first communication unit and a second communication unit.

[0186] The first communication unit is configured to receive higher layer signaling from the first node, and the higher layer signaling includes the first identifier. The second communication unit is configured to receive a first physical layer control signaling at a certain operating frequency number, some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier, and the operating frequency number is the first frequency number. The first physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number.

[0187] Optionally, the communication device is a second node, or the communication device is a module (e.g., a chip, integrated circuit, or software module) within the second node.

[0188] In another possible implementation of the fourth aspect, the first identifier corresponds to the frequency number switching function.

[0189] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes a function indicator field, the function indicator field indicating that the first identifier corresponds to a frequency number switching function.

[0190] In yet another possible implementation of the fourth aspect, some of the information bits in the first physical layer control signaling include a cyclic redundancy check (CRC) code for the first physical layer control signaling.

[0191] In yet another possible implementation of the fourth aspect, the resources for transmitting the first physical layer control signaling belong to a pre-configured physical layer control signaling common resource.

[0192] In yet another possible implementation of the fourth embodiment, the communication device further includes a processing unit and a third communication unit, Processing unit teeth, The system is configured to descramble some or all of the information bits in the first physical layer control signaling by using a first identifier. Third communication unit teeth, It is configured to communicate with the first node using a second frequency number.

[0193] When all information bits in the first physical layer control signaling are scrambled using a first identifier, it should be understood that the processing unit descrambles all information bits in the first physical layer control signaling using the first identifier.

[0194] When some information bits in the first physical layer control signaling are scrambled using a first identifier, the processing unit descrambles some information bits in the first physical layer control signaling using the first identifier.

[0195] In yet another possible implementation of the fourth aspect, the superframe sequence numbers of the first and second superframes are consecutive, the first superframe is the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe is the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node has been switched from the first frequency number to the second frequency number.

[0196] In other words, the superframe sequence numbers of the superframe are consecutive before and after the switching of the operating frequency number.

[0197] In yet another possible implementation of the fourth aspect, the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0198] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes one or more of the following pieces of information: a second frequency number identifier, a superframe sequence number continuity indicator, a frequency number switching moment indicator, a reaccess indicator, a switching interval indicator, or a preamble indicator.

[0199] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes a second frequency number identifier, which indicates the destination frequency number for switching and includes, but is not limited to, a frequency number sequence number, a frequency number index number, or a channel number.

[0200] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes a superframe sequence number continuity indicator, which indicates whether it is guaranteed that the superframe sequence numbers of the first superframe and the second superframe are continuity.

[0201] In one possible design, when the sixth value is, the superframe Sequence number The continuity instruction indicates that it is not guaranteed that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch will be consecutive.

[0202] In one possible design, when the value is 7, the superframe Sequence number The continuity indication shows that the superframe sequence number of the last superframe before the operating frequency number change and the superframe sequence number of the first superframe after the operating frequency number change are consecutive.

[0203] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes an indication of the moment of frequency number switching. The indication of the moment of switching indicates an opportunity to switch the operating frequency number.

[0204] In one possible configuration, the indication of the frequency number switching moment indicates the moment when the first node begins switching the operating frequency number, for example, indicating the superframe sequence number of the last subframe used by the first node for transmission at the current operating frequency number, or indicating the relative offset of the last superframe used by the first node for transmission at the current operating frequency number to the superframe for transmitting the first physical layer control signaling.

[0205] In another possible configuration, the indication of the frequency number switching moment would indicate the start moment when transmission begins at the second frequency number, for example, the superframe sequence number of the first superframe used by the first node for transmission at the second frequency number, or the relative offset of the start moment of the first superframe used by the first node for transmission at the second frequency number to the start moment of the superframe for transmitting the first physical layer control signaling.

[0206] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0207] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes a reaccess instruction. The reaccess instruction is instructional information indicating whether a second node needs to perform reaccess.

[0208] In some possible scenarios, a reaccess instruction would instruct a second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration would remain unchanged, or be changed only slightly, or only changes would be made to communication domain system configurations that do not affect the scheduling of the current transmission (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration). This avoids reaccessing the second node and prevents the invalidation of the current scheduling.

[0209] In yet another possible implementation of the fourth embodiment, the communication device further includes a third communication unit, the third communication unit configured to perform a reaccess operation when the reaccess instruction is a first value.

[0210] In yet another possible implementation of the fourth aspect, when the value is second, the reaccess instruction instructs the second node to maintain the current access state or not to perform the access operation.

[0211] In yet another possible implementation of the fourth embodiment, the first physical layer control signaling includes a switching interval instruction, the switching interval indicating the time interval between a first superframe and a second superframe.

[0212] Optionally, the switching interval can be set to the following time intervals, i.e. This may include one or more of the following: the time interval between the end of the first superframe and the start of the second superframe; the time interval between the start of the first superframe and the start of the second superframe; the time interval between the end of the first superframe and the end of the second superframe; and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0213] In yet another possible implementation of the fourth aspect, the switching interval instruction further indicates whether the first node transmits preamble information at the second frequency number.

[0214] Based on the switching interval instruction, the communication device may decide whether to receive preamble information from the first node at a second frequency number.

[0215] In yet another possible implementation of the fourth embodiment, the communication device further includes a third communication unit, which is configured to receive preamble information from the first node at a second frequency number when the switching interval instruction is greater than a third value.

[0216] In yet another possible implementation of the fourth aspect, when the switching interval indicator is 0, it indicates that the first node will not transmit preamble information at the second frequency number, or when the switching interval indicator is a value greater than 0, it indicates that the first node will transmit preamble information at the second frequency number.

[0217] The communication device further includes a third communication unit, which is configured to receive preamble information from the first node at a second frequency number when the switching interval instruction is greater than 0.

[0218] In yet another possible implementation of the fourth aspect, the first physical layer control signaling includes a preamble instruction, which indicates that the first node will transmit preamble information at a second frequency number, or that the first node will not transmit preamble information at a second frequency number.

[0219] Optionally, the third communication unit is configured to receive preamble information from the first node at the second frequency number when the preamble instruction is the fourth value.

[0220] In yet another possible implementation of the fourth embodiment, the first physical layer control signaling does not need to carry additional preamble instructions when the switching interval indicates whether preamble information is to be transmitted.

[0221] In yet another possible implementation of the fourth aspect, the first identifier may be used in multiple frequency number switching processes.

[0222] In yet another possible implementation of the fourth embodiment, the second communication unit further: It is configured to receive a second physical layer control signaling from a first node at a certain operating frequency number, the second physical layer control signaling indicating a switch in the operating frequency number to a third frequency number, some information bits in the second physical layer control signaling being scrambled using a first identifier, and the operating frequency number being the second frequency number.

[0223] In yet another possible implementation of the fourth aspect, the communication device further includes a fourth communication unit, the fourth communication unit configured to transmit frequency number capability information of a second node to the first node, the frequency number capability information of the second node indicating the frequency numbers supported by the second node.

[0224] Optionally, the second frequency number belongs to the frequency numbers supported by the second frequency number.

[0225] Optionally, frequency number capability information is used to determine the switching interval.

[0226] In yet another possible implementation of the fourth aspect, the first physical layer control signaling is transmitted in a broadcast and / or multicast manner.

[0227] In yet another possible implementation of the fourth aspect, the communication device does not send feedback indicating whether it has successfully detected the first physical layer control signaling.

[0228] In yet another possible implementation of the fourth embodiment, the second communication unit further: The first physical layer control signaling is received in the third superframe at the operating frequency number, and the operating frequency number is the first frequency number, The system is configured to receive a third physical layer control signaling in the fourth superframe at an operating frequency number, with some or all of the information bits in the third physical layer control signaling scrambled using a first identifier, where the operating frequency number is the first frequency number and the third physical layer control signaling indicates a switch of the operating frequency number of the first node to the second frequency number.

[0229] In yet another possible implementation of the fourth aspect, the first physical layer control signaling belongs to one of a plurality of physical layer control signalings, the plurality of physical layer control signalings further includes a fourth physical layer control signaling, and the length of the first physical layer control signaling is the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from the function of the fourth physical layer control signaling.

[0230] In the implementation described above, the bit length of the first physical layer control signaling is the same as the bit length of another type of physical layer control signaling that indicates a different function. In other words, the bit length of the first physical layer control signaling belongs to the existing bit length.

[0231] According to a fifth aspect, one embodiment of the present application discloses a communication device including a processor and a communication interface. The communication interface is configured to receive and / or transmit signals, and / or to provide inputs and / or outputs for the processor.

[0232] When the processor invokes a computer program or instruction in memory, the communication device implements the method described in either the first embodiment or the implementation of the first embodiment.

[0233] According to a sixth aspect, one embodiment of the present application discloses a communication device including a processor and a communication interface. The communication interface is configured to receive and / or transmit signals, and / or the communication interface is configured to provide inputs and / or outputs for the processor.

[0234] When the processor invokes a computer program or instruction in memory, the communication device implements the method described in either the second embodiment or the implementation of the second embodiment.

[0235] It should be noted that the processors included in the communication devices described in the fifth and / or sixth embodiments may be processors specifically configured to perform these methods (referred to as dedicated processors for simplicity of distinction), or processors that perform these methods by calling computer programs, such as general-purpose processors. Optionally, at least one processor may further include both dedicated and general-purpose processors.

[0236] Optionally, the aforementioned computer programs or instructions may be stored in memory. For example, the memory may be non-transitory memory, such as read-only memory (ROM). The memory and processor may be integrated on the same component or arranged separately on different components. The type of memory and the arrangement of the memory and processor are not limited to the embodiments of this application.

[0237] In one possible implementation, at least one memory is located outside the communication device.

[0238] In another possible implementation, at least one memory is located within the communication device.

[0239] In yet another possible implementation, some of the memory in at least one memory is located inside the communication device, while other memory is located outside the communication device.

[0240] In this application, the processor and memory can be integrated into a single component as an alternative. In other words, the processor and memory can be integrated together as an alternative.

[0241] According to a seventh aspect, one embodiment of the present application further provides a communication device. The communication device includes a logic circuit and a communication interface. The communication interface is configured to receive or transmit signals, and the logic circuit is configured to receive or transmit signals through the communication interface in order to carry out the method according to either the first aspect or an implementation of the first aspect.

[0242] According to the eighth aspect, one embodiment of the present application further provides a communication device. The communication device includes a logic circuit and a communication interface. The communication interface is configured to receive or transmit signals, and the logic circuit is according to the second aspect or the 2To carry out the method according to any one of the implementation forms of the embodiments, it is configured to receive or transmit signals through a communication interface.

[0243] According to the ninth aspect, one embodiment of the present application further provides a communication system comprising a first node and / or a second node.

[0244] The first node includes a communication device as described in the third embodiment or one of the possible implementations of the third embodiment.

[0245] The second node includes a communication device as described in the fourth embodiment or one of the possible implementations of the fourth embodiment.

[0246] According to a tenth aspect, one embodiment of the present application further provides a communication system comprising a first node and / or a second node.

[0247] The first node includes a communication device as described in the fifth embodiment, and the second node includes a communication device as described in the sixth embodiment.

[0248] According to an eleventh aspect, one embodiment of the present application further provides a communication system comprising a first node and / or a second node.

[0249] The first node includes a communication device as described in the seventh embodiment, and the second node is the 8 Includes communication devices as described in the embodiment.

[0250] According to the twelfth aspect, one embodiment of the present application discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed on a communication device, the communication device is enabled to implement a method described in the first aspect or one of the possible implementations of the first aspect, or a method described in the second aspect or one of the possible implementations of the second aspect.

[0251] According to the thirteenth aspect, one embodiment of the present application discloses a computer program product. When the computer program product is executed on one or more processors, a method described in the first aspect or one of the possible implementations of the first aspect is performed, or a method described in the second aspect or one of the possible implementations of the second aspect is performed.

[0252] According to a fourteenth aspect, an embodiment of the present application discloses a terminal. The terminal includes a first node and / or a second node. The terminal includes, but is not limited to, a handheld terminal device, a means of transport, an in-vehicle device, a sensing device, or an entertainment and leisure device. For example, the terminal may be a smart terminal, or a transport vehicle such as an automobile, an unmanned aerial vehicle, or a robot.

[0253] In one possible implementation, the second node includes a device described in the third embodiment or one of the possible implementations of the third embodiment. The first node includes a communication device described in the fourth embodiment or one of the possible implementations of the fourth embodiment.

[0254] In another possible implementation, the second node includes the device described in the fifth embodiment or one of the possible implementations of the fifth embodiment. The first node includes the communication device described in the sixth embodiment or one of the possible implementations of the sixth embodiment.

[0255] In yet another possible implementation, the second node includes the device described in the seventh embodiment or one of the possible implementations of the seventh embodiment. The first node includes the communication device described in the eighth embodiment or one of the possible implementations of the eighth embodiment.

[0256] Optionally, the first node may include one or more modules such as a gateway, base station, or automotive cockpit domain controller (CDC).

[0257] Optionally, the second node may include one or more modules such as a camera, screen, microphone, speaker, radar, electronic key, keyless entry, start system controller, battery management system, and battery pack.

[0258] For the beneficial effects of the technical measures provided in the second to fourteenth aspects of this application, please refer to the beneficial effects of the technical measures in the first aspect. Further details will not be explained here.

[0259] The following is a brief description of the attached drawings used in the description of the embodiments. [Brief explanation of the drawing]

[0260] [Figure 1A] This is a diagram of a communication area according to one embodiment of the present application. [Figure 1B] Another diagram of a communication area according to one embodiment of this application. [Figure 2] This is a diagram showing frequency numbers according to one embodiment of the present application. [Figure 3] This is a diagram of a communication system according to one embodiment of the present application. [Figure 4] This is a schematic flowchart of a communication method according to one embodiment of this application. [Figure 5] This is a diagram of a first identifier according to one embodiment of the present application. [Figure 6]This is a diagram illustrating the correspondence between another first identifier and function according to one embodiment of the present application. [Figure 7] These are diagrams of multiple superframes according to one embodiment of the present application. [Figure 8] This is another diagram of multiple superframes according to one embodiment of the present application. [Figure 9] This is a schematic flowchart of another communication method according to one embodiment of this application. [Figure 10] This is a schematic flowchart of another communication method according to one embodiment of this application. [Figure 11] This is a schematic flowchart of another communication method according to one embodiment of this application. [Figure 12] This is a diagram showing the structure of a communication device according to one embodiment of this application. [Figure 13] This is a diagram showing the structure of another communication device according to one embodiment of this application. [Modes for carrying out the invention]

[0261] To facilitate understanding of the detailed implementation of the measures in the embodiments of this application, the following will first explain the technical terms used in the embodiments of this application.

[0262] 1. Node A node (or communication node) is a device with communication capabilities, and may include, but is not limited to, one or more terminal devices, network devices, industrial devices, or entertainment devices.

[0263] Terminal devices include, but are not limited to, handheld terminals, wearable devices, means of transport, in-vehicle devices, sensing devices, and smart home devices. Handheld terminals include, but are not limited to, mobile phones, tablets, or notebook computers. Wearable devices include, but are not limited to, headsets, smart bands, smartwatches, or smart glasses. Means of transport include, but are not limited to, automobiles, ships, aircraft, rail (such as subways and high-speed rail), or logistics robots (such as automated guided vehicles (AGVs)). In-vehicle devices include, but are not limited to, domain controllers (DCs), screens, microphones, speakers, electronic keys, keyless entry, start system controllers, and battery management systems (BMS). Sensing devices include, but are not limited to, cameras, radar, lidar, light sensors, temperature sensors, or humidity sensors. Smart home devices include, but are not limited to, projectors, smart televisions, smart refrigerators, smart doorways, or security devices.

[0264] Network devices include, but are not limited to, routers, switches, or base stations. Industrial devices include, for example, industrial robots and robotic arms. Leisure and entertainment devices include, for example, virtual reality (VR) devices, mixed reality (MR) devices, massage chairs, home theaters, game control devices, or 4D cinema cockpits.

[0265] The nodes in the embodiments of this application may be used in a variety of scenarios, such as smart cars, smart homes, smart terminals, smart manufacturing, or smart showrooms. In some application scenarios or some network types, devices with similar communication capabilities may not be called nodes. However, for the sake of simplicity, devices with communication capabilities are collectively referred to as nodes in the embodiments of this application.

[0266] 2. Communication Domain In a communication system, nodes include management nodes (or G nodes) and managed nodes (or T nodes). A G node manages a certain number of T nodes, and the G node connects to these T nodes to jointly complete specific communication functions.

[0267] A G node and a T node connected to it belong to a communication domain. A communication domain can optionally contain one or more G nodes. For example, a single G node and a T node connected to it jointly form a communication domain.

[0268] Figure 1A is a diagram of a communication domain according to one embodiment of the present application. A smart car scenario is used as an example. A cockpit domain controller (CDC) may be used as a G node, and various in-vehicle devices (e.g., microphones and loudspeakers) may be used as T nodes to jointly complete the cockpit entertainment functions. In this case, the CDC and the in-vehicle devices form a communication domain, which is referred to as the first communication domain for simplicity of distinction. Optionally, when a mobile phone is connected to the CDC, that mobile phone may also be used as a T node in the first communication domain. Similarly, when a Passive Entry Passive Start (PEPS) is connected to the CDC, the PEPS may also be used as a T node in the first communication domain.

[0269] In some scenarios, there can be multiple communication domains. As shown in Figure 1A, a mobile phone can also be used as a G-node to connect to a wearable device (e.g., a headset or smartwatch). In this case, the mobile phone and the wearable device form another communication domain, for example, the second communication domain shown in Figure 1A. In another example, a PEPS can also be used as a G-node to connect to a body control module (BCM), a mobile phone key, and a car key. In this case, the PEPS, BCM, mobile phone key, and car key form another communication domain, for example, the third communication domain shown in Figure 1A.

[0270] In scenarios involving multiple communication domains, these domains may have different levels of operation. For example, communication domains can be classified into advanced domains, general domains, and so on. In this case, the advanced domain can perform resource coordination to achieve cooperation and coexistence among the multiple domains.

[0271] Figure 1B is another diagram of a communication domain according to one embodiment of the present application. A smart home scenario is used as an example. A television, a speaker connected to the television, and a microphone belong to a communication domain, which is a general communication domain. A mobile phone and a headset connected to the mobile phone belong to another communication domain, which is an advanced communication domain. The mobile phone can perform resource management between multiple domains.

[0272] 3. G-Link A communication link from a G node to a T node may be called a G link. A communication link from a T node to a G node may be called a T link.

[0273] 4. Common Resources Common resources are resources that can be shared by multiple nodes, and are not limited to time-frequency resources. Nodes sharing common resources can detect signaling on those resources.

[0274] For example, in a communication area including a G node and a T node, the common resource is a pre-configured resource shared by the T node in that communication area.

[0275] In a possible implementation, a common resource can be used to transmit multiple types of signaling. For example, the common resource may include a common resource for transmitting physical layer control signaling. A node can blindly detect physical layer control signaling in the common resource for transmitting physical layer control signaling.

[0276] 5. Detection and Blind Detection Signal detection is a process of attempting to receive a signal. A second node is used as an example. The second node attempts to receive a signal on a time-frequency resource. If the decoding and CRC check performed on the signal are successful, the signal is considered to have been received successfully.

[0277] Blind detection is a signal detection method. On the premise that a node in a specified time-frequency resource does not know whether it should transmit information and does not know the content of the transmitted information, the node attempts to receive a signal and identify the content of the information corresponding to the signal.

[0278] 6. Scrambling Scrambling refers to obtaining a new signal based on the original signal and a scrambling code. The reverse operation of scrambling is descrambling.

[0279] <F 7. Superframe A superframe, that is, a time unit, includes a plurality of radio frames. Each radio frame includes one or more symbols, and the symbols can be, for example, orthogonal frequency division multiplexing (OFDM) symbols.

[0280] SparkLink Basic (SLB) technology is used as an example. The superframe duration is 1 millisecond (ms), meaning the length of the superframe is 1 ms. One superframe contains 48 radio frames, and the length of each radio frame is 1 / 48 = 20.833 microseconds (μs).

[0281] A superframe has a superframe sequence number (or number, or superframe number) to distinguish different superframes within a given period. Generally, one or more bits are used for representation, i.e., a superframe sequence number contains S bits, where S is a positive integer and S > 0.

[0282] The number of bits in a superframe sequence number is usually limited, so a rollover occurs when the superframe sequence number reaches its maximum count value. For example, a superframe sequence number is represented by 8 bits of data (from 0x00 to 0xFF). When a signal is continuously transmitted / received across multiple superframes, the superframe sequence number is continuously accumulated. When the superframe sequence number reaches 0xFF, a frame number rollover occurs, and the count starts again from 0x00.

[0283] 8. Frequency number The frequency number, also called the carrier, is a number within a frequency range and indicates the transmit / receive frequency. For example, Figure 2 shows a diagram of possible frequency numbers. The available bandwidth spans from X megahertz (MHz) to (X+160) MHz. The available bandwidth is divided into eight frequency bands based on a frequency interval of 20 MHz. All frequency bands are numbered 1, 2, 3, 4, ..., and 8, respectively. These fixed frequency numbers are the frequency numbers. It should be understood that the available bandwidth, bandwidth width, and frequency number quantities shown in Figure 2 are examples only and are not intended to limit the embodiments of this application.

[0284] The frequency numbers shown in Figure 2 are used as examples. If the operating frequency number of the first node is frequency number 1, then the signals transmitted by the first node are transmitted within the frequency range corresponding to frequency number 1, and / or the signals received by the first node are received within the frequency range corresponding to frequency number 1.

[0285] When the operating frequency number is frequency number 1, signaling, data, etc. transmitted and / or received by the first node are transmitted at frequency number 1. After the operating frequency number is switched to frequency number 2, signaling, data, etc. transmitted and / or received by the first node are transmitted at frequency number 2.

[0286] 9. Preamble information (or simply called the preamble) Preamble information is a fragment of information transmitted by the first node at the frequency number acquired after a frequency number switch. For example, after a frequency number switch, and before the first node enters the superframe structure, the preamble information fragment is transmitted first.

[0287] Optionally, the preamble information may indicate changes in configuration information, such as changes in the random access resource pool configuration and the channel sounding reference signal (SRS) resource pool configuration.

[0288] In some possible designs, preamble information may be used for synchronization with the receiving node.

[0289] In some other possible designs, preamble information may be used to obtain communication channel information, for example, for channel estimation and channel quality assessment. For example, a first node transmits preamble information at a second frequency number, and a second node receives the preamble information accordingly. The second node may then measure the channel between the first and second nodes based on the preamble information to obtain channel quality, etc.

[0290] In some possible implementations, the content of the preamble information may be predetermined (for example, specified in the protocol), pre-configured, or configured using higher-level signaling.

[0291] 10. Access As used in embodiments of this application, “access” refers to the process by which one node establishes a connection to another node. In some specific technical scenarios, the process of one node “accessing” another node may also be described as one node “associating” another node.

[0292] In the following embodiments, the above-described explanations of technical terms are used at the discretion of the user.

[0293] The following describes the system architecture in an embodiment of the present application. It should be noted that the system architecture described in the present application is intended to more clearly describe the technical measures in the present application, but is not a limitation on the technical measures provided in the present application. Those skilled in the art may know that due to the evolution of the system architecture and the emergence of new service scenarios, the technical measures provided in the present application are also applicable to similar technical problems.

[0294] FIG. 3 is a diagram of a possible communication system according to an embodiment of the present application. The communication system includes a first node 301 and a second node 302. The first node 301 has communication capabilities and is capable of transmitting signals.

[0295] The first node 301 transmits a signal at a certain frequency number. The frequency number at which the signal is transmitted and received is called the operating frequency number. The operating frequency number may be changed, and the change of the operating frequency number is called frequency number switching.

[0296] The second node 302 has communication capabilities and is capable of receiving signals. The second node 302 can receive the signal transmitted by the first node 301 at its operating frequency number, that is, the first node 301 communicates with the second node 302 at its operating frequency number.

[0297] Optionally, the link for communication between the second node 302 and the first node 301 may include various types of connection media, including wired links (e.g., optical fiber), wireless links, and combinations of wired and wireless links. For example, short-range connection technologies may be used, which may include SparkLink, 802.11b / g, Bluetooth®, Zigbee, radio frequency identification (RFID) technology, and ultra-wideband (UWB) technology. In another example, long-range connectivity technologies may be used as alternatives, which may include, but are not limited to, communication technologies based on Long Term Evolution, fifth-generation mobile networks (or fifth-generation wireless systems, 5G or 5G technology), global System for mobile communications (GSM), general packet radio service (GPRS), and universal mobile telecommunications system (UMTS).

[0298] In some specific implementation scenarios, the first node may be called a G node, control node, or access point. The second node may be called a T node or terminal node.

[0299] It should be understood that the number, location, and connection relationships of nodes shown in the accompanying drawings in the embodiments of this application are possible examples for the sake of simplicity of explanation and are not intended to limit specific communication systems or specific communication scenarios.

[0300] Various types of interference exist in wireless communication environments. Therefore, communication systems need to have interference prevention capabilities. For example, as shown in Figure 3, if the current operating frequency number of the first node 301 and the second node 302 is frequency number 1, the operating frequency number may be switched to suppress the effects of interference if interference is present or severe at frequency number 1. For example, the first node 301 may switch its operating frequency number to frequency number 2.

[0301] When the first node 301 switches frequency numbers, it must notify other nodes communicating with it (e.g., the second node 302) of the operational frequency number switch so that the second node 302 can perform the necessary actions to maintain communication status. The frequency number switching process has high time requirements. If the interval between the time it is decided to switch frequency numbers and the time the frequency numbers are actually switched is long, another communication system may preemptively acquire the frequency number. This affects transmission performance.

[0302] In view of this, the communication method and related apparatus provided in the embodiments of this application can be used to shorten the time duration of frequency number switching and improve the transmission performance of the inter-node communication network.

[0303] In one possible implementation, when switching frequency numbers, the first node notifies the second node of the operational frequency number switch by using physical layer control signaling indicating the frequency number switch, and the physical layer control signaling indicating the frequency number switch is scrambled by using a first identifier to distinguish the physical layer control signaling from physical layer signaling of other functions. In the implementation described above, the instruction for operational frequency number switching is completed by using the first identifier and physical layer control signaling. This shortens the time length of the frequency number switch so that the first and second nodes can switch to the second frequency number as quickly as possible to perform communication. This improves the transmission performance of the communication network.

[0304] It should be understood that the first identifier may be configured on the second node by using signaling (e.g., higher-layer signaling). Alternatively, the first identifier may be obtained in advance by both the first and second nodes. For example, the first identifier may be specified in the protocol or pre-configured on the second node.

[0305] The following describes in detail the method in the embodiment of this application.

[0306] Figure 4 is a schematic flowchart of a communication method according to one embodiment of the present application. Optionally, the method may be implemented based on the communication system shown in Figure 3.

[0307] The communication method shown in Figure 4 may include one or more steps S401 to S403. For the sake of simplicity in this application, the order S401 to S403 is used for illustrative purposes, but it should be understood that this does not necessarily limit the execution to being performed in the order described above. The execution order, execution time, number of executions, etc., of one or more steps described above are not limited to the embodiments of this application. Specifically, steps S401 to S403 are as follows:

[0308] Step S401: The first node sends a higher layer signaling, which includes the first identifier.

[0309] Optionally, a node receiving higher-layer signaling may include a second node. This application will be illustrated by using an example in which the receiving end is a second node. There may be one or more second nodes, that is, the second node receives higher-layer signaling from the first node.

[0310] Higher-level signaling includes, but is not limited to, X resource control (XRC) signaling or system messages. X resources include, but is not limited to, radio resources. Optionally, XRC signaling includes XRC setup signaling, XRC reconfiguration signaling, etc. X resource control may also be called radio resource control.

[0311] For example, the first identifier contains information about several bits. The number and position of the bits in the higher-layer signaling are not strictly limited in the embodiments of this application. Figure 5 is a diagram of a possible first identifier according to one embodiment of this application. The first identifier contains a 6-bit signal (this is just an example) located from the nth bit to the (n+6th)th bit in the higher-layer signaling. For example, the first identifier is "111000", where the value of each bit is just an example.

[0312] In some scenarios, the first identifier is frequency number switching. Functions that correspond It can also be called an identifier.

[0313] In one possible implementation, the first identifier corresponds to a frequency number switching function. Figure 6 shows the mapping of the first identifier to a function according to one embodiment of the present application. In one possible implementation, as shown in Figure 6, the first identifier may be used to distinguish physical layer control signaling indicating frequency number switching. For example, some or all of the information bits in physical layer control signaling indicating frequency number switching may be scrambled using the first identifier. If, after a second node receives the control signaling, the control signaling can be descrambled using the first identifier, then the signaling is physical layer control signaling indicating frequency number switching.

[0314] In another possible implementation, the first identifier corresponds to a group of signaling function types, which is called a function group, and the function group includes one or more physical layer control signalings of function types. A physical layer control signaling indicating frequency number switching belongs to the signaling in the function group. For example, as shown in Figure 6(b), the function group corresponding to the first identifier includes a physical layer control signaling indicating frequency number switching, a physical layer control signaling for implementing function F1, and a physical layer control signaling for implementing function F2. In this case, the physical layer control signaling further includes a function instruction field, and the function of the signaling is jointly indicated by using the first identifier and the function instruction field.

[0315] Note that when the operating frequency number is the first frequency number, higher layer signaling may be transmitted. Naturally, higher layer signaling may also be transmitted when the operating frequency number is not the first frequency number. For example, a frequency number switch may occur after higher layer signaling has been transmitted. In this case, the operating frequency number for transmitting the higher layer signaling may be a different frequency number.

[0316] Optionally, the first node may transmit higher-layer signaling via broadcast, multicast, or unicast. In the broadcast mode, higher-layer signaling may be transmitted to all nodes (or all nodes within a specific range) via broadcast. In the multicast mode, higher-layer signaling may be transmitted to a group of nodes via multicast. In the unicast mode, higher-layer signaling is transmitted to a single node via unicast.

[0317] In some possible implementations, broadcast, multicast, and unicast can be performed based on the destination address of the signaling. In the broadcast scheme, the destination address of the signaling is the broadcast address. In the multicast scheme, the destination address of the signaling is the multicast address. In the unicast scheme, the destination address of the signaling is the address of the receiving end, for example, the receiving end's Internet Protocol (IP) address and / or the Media Access Control (MAC) address of the second node.

[0318] In other possible implementations, broadcast, multicast, and unicast can be performed through channels for transmitting signaling. For example, in a broadcast scheme, the channel for transmitting signaling is the broadcast channel. In a multicast scheme, the channel for transmitting signaling is the channel for communication between groups of nodes. Arbitrary signaling is distinguished by the use of identifiers (or keys or coding / decoding schemes). In a unicast scheme, the channel for transmitting signaling is the channel between two nodes in point-to-point communication. Arbitrary signaling is distinguished by the use of identifiers (or keys or coding / decoding schemes).

[0319] The two implementation forms described above are examples of implementation. The methods for implementing broadcast, multicast, and unicast are not strictly limited in this application, and other implementation forms may be included in a particular implementation process.

[0320] Step S402: The first node transmits the first physical layer control signaling at the operating frequency number.

[0321] Optionally, the node receiving the first physical layer control information may include a second node. This is illustrated below by using an example where the receiving end is the second node. That is, the second node receives the first physical layer control signaling.

[0322] To simplify the explanation, when the first physical layer control signaling is transmitted, the operating frequency number of the first node is called the first frequency number.

[0323] In some scenarios, physical layer control signaling is also referred to as physical layer control information, or frequency number switching physical layer control signaling. It should be understood that the names of signaling, information, and fields are not limited to the embodiments of this application and are merely examples for illustrative and illustrative purposes. The names of signaling, information, and fields in this application may be replaced randomly.

[0324] The first physical layer control signaling indicates a switch in the operating frequency number to a second frequency number. For example, the first physical layer control signaling includes a destination frequency number field, the value of which is the identifier of the second frequency number, or includes the identifier of the second frequency number. In another example, the first physical layer control signaling includes the identifier of the second frequency number and an indication of the moment of frequency number switching. In yet another example, the first physical layer control signaling corresponds to a frequency number switching function, and the first physical layer control signaling includes the identifier of the second frequency number.

[0325] Optionally, the first physical layer control signaling indicates a switch in the operating frequency number of the first node to a second frequency number. In one possible policy, the first physical layer control signaling is used to notify the second node of the switch in the operating frequency number of the first node. In this case, the second node may switch its operating frequency number to the second frequency number in order to communicate with the first node. Alternatively, the second node does not have to switch its operating frequency number. For example, if the second node has completed its tasks for the first node, the second node does not need to maintain a communication connection with the first node.

[0326] Alternatively, optionally, the first physical layer control signaling instructs a second node (i.e., the node receiving the first physical layer control signaling) to switch its operating frequency number to a second frequency number. In response, the second node receives the first physical layer control signaling and switches its operating frequency number to the second frequency number.

[0327] It should be understood that the above examples can be combined. An instruction to switch the operating frequency number of the first node to the second frequency number can also be considered an instruction to switch the operating frequency number of the second node. That is, the first physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number, and also indicates a switch in the operating frequency number of the second node to the second frequency number.

[0328] Some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier. If a second node can descramble the first physical layer control signaling using the first identifier, the second node can acquire the functionality of the first physical layer control signaling, acquire the data content of the first physical layer control signaling based on the data format of the first physical layer control signaling, and thus be able to receive instructions for switching the operating frequency number.

[0329] In one possible implementation, after detecting a physical layer control signaling, a second node may descramble some or all of the information bits in the physical layer control signaling. If the scrambling and descrambling are successful using the first identifier, the physical layer control signaling is determined to be a physical layer control signaling indicating a frequency number switch, and the corresponding information can be extracted based on the format of the frequency number switch physical layer control signaling.

[0330] Optionally, the descrambling process described above may be performed after the first physical layer control signaling has been decoded. Since the first identifier is used in the scrambling process of the signaling, the first physical layer control signaling is used encoding / The decoding scheme can be the same as the encoding / decoding scheme of other signaling systems. This environment can further reduce the frequency number switching time without prolonging the decoding time of the second node.

[0331] In one possible implementation, the Cyclic Redundancy Check (CRC) code in the first physical layer control signaling is frequency number switching. function Scrambling is performed by using the corresponding identifier. In the implementation described above, after decoding the physical layer control signaling, the second node separately performs a CRC check on the decoded physical layer control signaling by using one or more configured scrambling codes. Frequency number switching function If the CRC check, performed by using the corresponding identifier as a scrambling code, is successful, it is determined that the physical layer control signaling is frequency number switching physical layer control signaling.

[0332] The following describes the information contained in the first physical layer control signaling. In one possible implementation, the first physical layer control signaling includes one or more pieces of information such as the identifier of the second frequency number, the indication of the moment of frequency number switching, the reaccess indication, the switching interval indication, the preamble indication, the function indication field, and the superframe sequence number continuity indication. The following illustrates the above information using an example.

[0333] (1) Identifier of the second frequency number: The identifier of the second frequency number indicates the destination frequency number for switching and may include, but is not limited to, the frequency number sequence number, the frequency number index number, the channel number, the center frequency of the frequency band corresponding to the frequency number, the start frequency of the frequency band corresponding to the frequency number, or the end frequency of the frequency band corresponding to the frequency number.

[0334] The frequency numbers shown in Figure 2 are used as examples. If the second frequency number is frequency number 2, the identifier of the second frequency number includes the channel number of frequency number 2, the index number of frequency number 2, the center frequency of frequency number 2, etc.

[0335] (2) Called the switching moment instruction, or switching moment information: The switching moment instruction indicates the opportunity (moment) to switch the operating frequency number.

[0336] For the sake of simplicity, in various embodiments of this application, the last superframe for transmission at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number is referred to as the first superframe, the first superframe for transmission at the second frequency number after the operating frequency number of the first node is switched from the first frequency number to the second frequency number is referred to as the second superframe, and “transmission” can specifically be a transmission of data and / or signaling.

[0337] In one possible implementation, the indication of the moment of frequency number switching indicates the moment when the operating frequency number switching begins, for example, indicating the superframe sequence number of the first superframe, or indicating the relative offset of the first superframe to the superframe for transmitting the first physical layer control signaling.

[0338] In another possible implementation, the indication of the frequency number switching moment would indicate the start moment when transmission begins at the second frequency number, for example, the superframe sequence number of the second superframe, or the relative offset of the second superframe to the start moment of the superframe for transmitting the first frequency number switching physical layer control signaling.

[0339] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0340] Figure 7 shows a plurality of superframes according to one embodiment of the present application. The superframe sequence number of the superframe for transmitting the first physical layer control signaling is 1 (this is just an example), and the opportunity to switch the operating frequency number follows a superframe whose superframe sequence number is 3. The indication for the moment of switching may be "3" (i.e., the superframe sequence number of the first superframe). Alternatively, the indication for the moment of switching may be "2" (i.e., the relative offset of the first superframe to the superframe for transmitting the first physical layer control signaling). Alternatively, the indication for the moment of switching may be "4" (i.e., the superframe sequence number of the second superframe). Alternatively, the indication for the moment of switching may be "3" (i.e., the relative offset of the start moment of the second superframe to the start moment of the superframe for transmitting the first frequency number switching physical layer control signaling).

[0341] (3) Reaccess Instruction: A reaccess instruction is instructional information that indicates whether the second node needs to perform reaccess.

[0342] In the frequency number switching process, the second node may need to perform a reaccess operation in some cases, or it may not need to in other cases. In the implementation described above, a reaccess instruction is carried in the first physical layer control signaling to flexibly regulate and control the behavior of the second node. This can improve the flexibility and stability of the communication system.

[0343] In some possible scenarios, a reaccess instruction would instruct a second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration would remain unchanged, or be changed only slightly, or only changes would be made to communication domain system configurations that do not affect the current transmission scheduling (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration). This avoids reaccess by the second node and prevents the invalidation of the current scheduling. This environment can reduce service disruptions caused by frequency number switches and improve transmission performance.

[0344] In some possible scenarios, the first node may adjust communication system parameters, such as cyclic prefix (CP) length and resource ratio, based on the second node's frequency number and / or the channel state of the current service requirements. If the second node re-accesses the first node, it is easier to activate the changes to the communication parameters, and the first node may instruct the second node to perform the re-access.

[0345] In one possible implementation, when the first value is true, the reaccess instruction tells the second node to perform an access operation at the second frequency number. Optionally, when the second value is true, the reaccess instruction tells the second node to maintain the current access state or not perform an access operation. The first and / or second values ​​may be predetermined by the user, vendor, or management device (e.g., specified in the protocol) or preconfigured on the node. The management device may be the first node, the second node, or a third-party device.

[0346] Access methods may include contention access, contention-free access, etc. Optionally, access actions may include sending an access request.

[0347] For example, a reaccess instruction includes one or more bits, the value of which indicates whether the second node should perform a reaccess. For example, a reaccess instruction includes one bit. When it is 0, the reaccess instruction tells the second node to maintain the current access state or not to perform a reaccess operation; or when it is 1, the reaccess instruction tells the second node to reaccess the first node.

[0348] Optionally, when performing an access operation, the second node may access the first node or another node. For example, when performing an access operation, the second node re-accesses the first node, and after the second node accesses the first node, the first and second nodes belong to the first communication area. In another example, after the second node performs an access operation, the second node may access the fourth node, and after the second node accesses the fourth node, the second and fourth nodes belong to the second communication area.

[0349] (4) Switching interval instruction: Due to the limitations of the device's capabilities, a specific time interval is required between the last transmission at the current operating frequency number (e.g., the first frequency number) and the first transmission at the next operating frequency number (e.g., the second frequency number). Devices with different capabilities differ in cost, power consumption, and complexity. Therefore, different devices have different switching capabilities, and the minimum time for switching may also differ.

[0350] Because switching operating frequency numbers takes time, there is a specific time interval between superframes for transmitting data and / or signaling before and after a frequency number switch. A switch instruction may indicate the interval between the last transmission at the current operating frequency number (e.g., the first frequency number) and the first transmission at the next operating frequency number (e.g., the second frequency number).

[0351] In one possible implementation, the switching interval represents the time interval between the last superframe for transmission at a first frequency number (i.e., the first superframe) and the first superframe for transmission at a second frequency number (i.e., the second superframe). For example, the first node determines the switching interval instruction based on its device capabilities (device capabilities of the first node and / or the second node) and transmits the switching interval instruction to the second node using first physical layer control signaling. In response, the second node can modify the communication configuration based on the switching interval instruction to improve communication stability. For example, based on the time interval, the second node may determine the time to start transmitting in the superframe after the switch, the position of the synchronization signal, and so on.

[0352] Optionally, the switching interval instruction may include one or more of the following time intervals: the time interval between the end of the first superframe and the start of the second superframe, the time interval between the start of the first superframe and the start of the second superframe, the time interval between the end of the first superframe and the end of the second superframe, and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0353] In one possible implementation, when the first node transmits preamble information at the second frequency number, the switching interval may include one or more of the following: the time interval between the end of the first superframe and the beginning of the preamble information, the time interval between the beginning of the first superframe and the beginning of the preamble information, and so on.

[0354] In one possible implementation, the switching interval instruction further indicates whether the first node transmits preamble information at the second frequency number. In response, the second node decides, based on the switching interval instruction, whether the first node transmits preamble information at the second frequency number.

[0355] Furthermore, if the switching interval indicates that the first node will transmit preamble information at the second frequency number, the second node will correspondingly receive preamble information at the second frequency number. Conversely, if the switching interval indicates that the first node will not transmit preamble information at the second frequency number, the second node does not need to receive preamble information at the second frequency number. It can be seen that the switching interval instruction can be used to flexibly regulate and control the behavior of the second node. This can improve the stability of the communication system.

[0356] In one possible design, when the switching interval instruction is greater than a third value, the first node transmits preamble information to at least one second node at an operating frequency number (i.e., a second frequency number) that occurs after the switchover. The third value may be predetermined by the user, vendor, or management device (e.g., specified in the protocol), or preconfigured on the node. The management device may be the first node, a second node, or a third-party device. Alternatively, optionally, when the switching interval instruction is less than the third value, the first node does not transmit preamble information at the second frequency number. It should be understood that when the switching interval is equal to the third value, the first node does not have to transmit preamble information at the second frequency number, or does not have to transmit preamble information at all.

[0357] For example, the transition interval instruction indicates the amount of milliseconds in the interval between the end of the first superframe and the start of the second superframe. A transition interval instruction greater than 1 (i.e., the interval between the end of the first superframe and the start of the second superframe is 1 ms) Larger than ) When this occurs, the first node transmits preamble information at the second frequency number. Correspondingly, when the interval indicated by the switching interval is less than 1 or less than or equal to 1, the first node does not transmit preamble information at the second frequency number.

[0358] In another possible design, preamble information is not sent when the switching interval instruction is 0, or preamble information is sent when the switching interval instruction is greater than 0.

[0359] When the first node does not send preamble information, the first and second nodes can communicate in the superframe as soon as possible. This reduces the time between the last superframe before the switchover and the first superframe after the switchover, thereby reducing the switchover time.

[0360] In one possible implementation, the switching interval represents the time interval between the start of the first superframe and the start of the second superframe, where the switching interval is N milliseconds, N is an integer, and N ≥ 0.

[0361] Optionally, the first node determines the time duration for frequency number switching based on the frequency number switching capability of the first node and / or the frequency number switching capability of the second node. The time interval indicated by the switching interval instruction is longer than the time duration for frequency number switching.

[0362] In one possible design, the first node rounds the time length for frequency number switching in order to obtain a switching interval indication. Optionally, the rounding scheme can be rounding up or another rounding scheme.

[0363] It should be understood that the switching interval instruction field does not necessarily have to be included in the first physical layer control signaling. For example, the switching interval may be specified in the protocol and pre-configured at the first and / or second nodes, or indicated by using signaling at other higher layers.

[0364] (5) Preamble indication: A preamble indication indicates that the first node will transmit preamble information at the second frequency number, or that the first node will not transmit preamble information at the second frequency number.

[0365] Optionally, when the preamble instruction is a fourth value, the first node transmits preamble information at the second frequency number. Alternatively, when the preamble instruction is a fifth value, the first node does not transmit preamble information at the second frequency number. The fourth and / or fifth values ​​may be predetermined by the user, vendor, or management device (for example, specified in the protocol), or preconfigured on the node. The management device may be the first node, the second node, or a third-party device.

[0366] For example, a preamble instruction contains information from one or more bits, the value of which indicates whether the first node transmits preamble information at the second frequency number. For example, a preamble instruction contains one bit. When it is 0, the preamble instruction indicates that the first node does not transmit preamble information at the second frequency number, or when it is 1, the preamble instruction indicates that the first node transmits preamble information at the second frequency number.

[0367] In one possible implementation, when the switching interval instruction indicates whether or not preamble information should be sent, the first physical layer control signaling does not need to carry the preamble instruction. This environment can reduce the fields of physical layer control signaling and improve scalability.

[0368] (6) Function Indicator Field: The function indicator field indicates the function of the signaling, or jointly indicates the function of the signaling using the first identifier.

[0369] In one possible implementation, the first identifier corresponds to one or more functions, and the function indicator field indicates that the first identifier corresponds to the frequency number switching function. For ease of understanding, Table 1 lists examples of values ​​and descriptions for several function indicator fields. With respect to Figure 6(b), the first identifier indicates multiple functions, including the frequency number switching function, function F1, and function F2. When the function indicator field in the signaling is 00, the first identifier indicates the frequency number switching function. Similarly, when the function indicator field in the signaling is 01, the first identifier indicates function F1 (example of function name), and when the function indicator field in the signaling is 10, the first identifier indicates function F2 (example of function name).

[0370] [Table 1]

[0371] It should be understood that the above is intended to facilitate an understanding of some possible values ​​for the function indicator fields, and not to limit the function indicator fields themselves. In a particular implementation process, the function indicator fields may contain more or fewer bits, and there may be a different design for mapping the values ​​of the function indicator fields to the functions they represent.

[0372] (7) Superframe sequence number continuity indication: The superframe sequence number continuity indication indicates whether it is guaranteed that the superframe sequence numbers of the first superframe and the second superframe are consecutive.

[0373] Optionally, when the sixth value is selected, Superframe Sequence number The continuity indicator indicates that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are not guaranteed to be consecutive, or when the value is 7, the superframe Sequence number The continuity indication shows that the superframe sequence number of the last superframe before the operating frequency number switch and the superframe sequence number of the first superframe after the operating frequency number switch are consecutive.

[0374] In one possible design, when the superframe sequence numbers are not guaranteed to be consecutive, scheduling performed before the operating frequency number switch is invalid at the second frequency number, and the first node must re-determine the scheduling. Alternatively, when the superframe sequence numbers are consecutive, scheduling performed before the operating frequency number switch is valid at the second frequency number, in which case the first node does not need to re-determine the scheduling. This reduces the switching time.

[0375] For example, the superframe sequence number continuity indicator contains 1 bit of information. When it is 1, the superframe sequence number continuity indicator indicates that the superframe sequence numbers of the first superframe and the second superframe are consecutive, or when it is 0, the superframe sequence number continuity indicator indicates that the superframe sequence numbers of the first superframe and the second superframe are not guaranteed to be consecutive.

[0376] The sixth and / or seventh values ​​may be predetermined by the user, vendor, or management device (for example, specified in the protocol), or pre-configured on the node. The management device may be the first node, the second node, or a third-party device.

[0377] The above describes the functions and information included in the first physical layer control signaling. The following describes an example of a method for transmitting the first physical layer control signaling.

[0378] In one possible implementation, the resources for transmitting the first physical layer control signaling belong to a pre-configured physical layer control signaling common resource. The physical layer control signaling common resource (or common resource) is a resource that can be shared by multiple second nodes for detecting physical layer control signaling, and may include, but is not limited to, time-frequency resources. Since the second nodes detect (or listen to) the signaling on the common resource, the nodes on which the common resource is configured can receive the first physical layer control signaling. Therefore, the first node does not need to notify the other nodes one by one of the frequency number switches. This shortens the time duration of frequency number switches.

[0379] Considering possible scenarios, there could be multiple second nodes. For example, in SparkLink Basic (SLB) technology, one communication domain could contain 4096 second nodes. In this case, notifying the second nodes one by one of the operating frequency number switches is time-consuming for the first node. This time-consuming notification results in a long interval between the time the second node decides to switch frequency numbers and the moment of the switch. As a result, the first node cannot switch to the new operating frequency number as quickly as possible, impacting transmission performance. In the implementation described above, the first physical layer control signaling is transmitted over a common resource. The second node can detect the first physical layer control signaling on the common resource and obtain the operating frequency number switch instruction in time, so that the first and second nodes can communicate on the new operating frequency number as quickly as possible. This improves the interference prevention capability of the communication system and improves transmission performance.

[0380] In one possible implementation, the first node may transmit physical layer control signaling multiple times to indicate the same frequency number switch. Since the first node repeatedly transmits the same frequency number switch signaling multiple times, the second node has multiple opportunities to detect the signaling. This reduces the probability of frequency number switch failure because the second node does not detect the signaling.

[0381] Optionally, physical layer control signaling indicating the same frequency number switch may be transmitted separately in multiple superframes. For example, the first physical layer control signaling is transmitted in the third superframe. In this case, the first node further transmits the third physical layer control signaling in the fourth superframe with the operating frequency number (the current operating frequency number is the first frequency number), and some or all of the information bits in the third physical layer control signaling are scrambled using the first identifier, so that the third physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number.

[0382] It should be understood that some or all of the information in physical layer control signaling indicating the same frequency number switch may be identical. For example, if the indication for the moment of the switch is the relative offset of the moment of the switch to the moment of the switch relative to the moment (or superframe) in which the physical layer control signaling is transmitted, then the values ​​of the indication for the moment of the switch in multiple physical layer control signaling indicating the same frequency number switch may differ.

[0383] Figure 8 is another diagram of a plurality of superframes according to one embodiment of the present application. A superframe sequence number of "1" carries physical layer control signaling 801. Physical layer control signaling 801 indicates a switch of the operating frequency number to a second frequency number, and physical layer control signaling 801 includes an indication of the moment of the switch, which indicates an offset between the start of the first superframe used by the first node for transmission at the second frequency number and the start of the superframe for transmitting the first frequency number switching physical layer control signaling, i.e., the indication of the moment of the switch is "2". A superframe sequence number of "2" carries physical layer control signaling 802. The content indicated by physical layer control signaling 802 (relating to frequency number switching) is the same as the content indicated by physical layer control signaling 801. Similarly, a superframe with superframe sequence number "3" carries physical layer control signaling 803. The content indicated by physical layer control signaling 803 is the same as the content indicated by physical layer control signaling 801 and physical layer control signaling 802.

[0384] When the first node transmits multiple physical layer control signaling signals to perform the same frequency number switching in superframes 1, 2, and 3, the second node can obtain the frequency number switching instruction by detecting any one of the physical layer control signaling signals. Therefore, the probability of successful frequency number switching can be increased using the above implementation, allowing the second node to continue communicating with the first node. This can improve transmission performance.

[0385] Alternatively, optionally, the first node may transmit multiple physical layer control signalings in a single superframe, so that multiple physical layer control signalings indicate the same frequency number switching.

[0386] In one possible implementation, the bit length of the physical layer control signaling indicating frequency number switching is the same as the bit length of another type of physical layer control signaling indicating a different function. In other words, the bit length of the physical layer control signaling indicating frequency number switching belongs to the existing bit length.

[0387] When the information bit length of the control signaling is the same, the encoding / decoding scheme of the control signaling is also the same. This environment allows for further reduction of the time required for frequency number switching without prolonging the decoding time at the receiving end, and does not significantly increase the complexity of blind detection of the physical layer signaling by the receiving end when the receiving end needs to additionally blindly detect the physical layer signaling for carrier switching.

[0388] For example, a first physical layer control signaling is used as an example, where the length of the first physical layer control signaling is the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from that of the fourth physical layer control signaling. In this environment, the first and fourth physical layer control signalings may use the same encoding / decoding scheme.

[0389] In one possible implementation, the second node does not send feedback indicating whether it has successfully detected the first physical layer control signaling. Reducing signaling interaction can further shorten the frequency-time switching time. Optionally, if the second node fails to receive the frequency number switching instruction, it may again perform an action to access the first node in order to communicate with the first node at the second frequency number.

[0390] Similarly, when the first node sends a second physical layer control signal, the second node does not send feedback indicating whether it successfully detected the second physical layer control signal. This reduces signaling interaction.

[0391] In one possible implementation, the first node may receive frequency number capability information transmitted by the second node, which includes one or more of the following: supported frequency numbers, supported switching intervals, etc.

[0392] For example, the second frequency number belongs to the frequency numbers supported by the second node.

[0393] For example, the first node can flexibly configure the switching interval based on frequency number capability information so that the switching interval matches the switching capabilities of the first and second nodes, shortening the switching interval as much as possible and reducing the excessive delay caused by frequency number switching.

[0394] Optionally, at the moment the first physical layer control signaling is transmitted, the second node may switch its operating frequency number to a second frequency number and receive or transmit signals at the second frequency number. That is, the embodiment shown in Figure 4 further includes step S403, which is specifically as follows:

[0395] Step S403 (optional): The first node performs communication on the second frequency number.

[0396] Specifically, the first node may communicate with at least one second node on a second frequency number. For example, the first node transmits data and / or signaling on the second frequency number. In another example, the first node receives data and / or signaling on the second frequency number.

[0397] In one possible implementation, the first node may switch its operating frequency number at the moment of frequency number switching. After the moment of frequency number switching, the first node communicates with at least one second node on the second frequency number. The moment of frequency number switching is the moment indicated by the frequency number switching moment instruction in the first physical layer control signaling.

[0398] In response, the second node, based on the instructions at the moment of frequency number switching, switches its operating frequency number to the second frequency number at the moment of frequency number switching. After the moment of frequency number switching, the second node communicates with the first node using the second frequency number.

[0399] In one possible implementation, the first node transmits preamble information to the second node at a second frequency number. In response, the second node receives preamble information from the first node.

[0400] In one possible implementation, the first physical layer control signaling instructs the second node to perform a reaccess operation, and the second node sends an access request to the first node to regain access to it.

[0401] In one possible implementation, the superframe sequence numbers of the superframes used by the first node for transmission are consecutive before and after the switching of the operating frequency number. That is, the superframe sequence numbers of the first and second superframes are consecutive. For example, as shown in Figures 7 and 8, the superframe sequence number of the last superframe used by the first node for transmission at the first frequency number is 3, and for transmission at the second frequency number... first The superframe sequence number for these two superframes is 4, and their frame numbers are consecutive. Note that since the number of bits in a superframe sequence number is usually limited, a new round of the count period may begin when the superframe sequence number count reaches its maximum value. This phenomenon is called frame number rollover. When a frame number rollover occurs, the superframe sequence numbers before and after the rollover are considered to be consecutive.

[0402] Switching operating frequency number Before and after, The superframe sequence numbers are consecutive, which ensures that transmissions are logically continuous. Therefore, scheduling prior to the operating frequency number switch can continue to be used after the switch without rescheduling. This significantly reduces the impact of the operating frequency number switch on the communication process and improves transmission performance.

[0403] Scheduling includes resource allocation in the frequency domain and resource allocation in the time domain. For example, the first node transmits a scheduling signaling in the Nth superframe, and the scheduling indicated by the scheduling signaling becomes effective in the (N+1)th superframe. If the superframe numbers are consecutive, the scheduling signaling transmitted in the last superframe before the operating frequency number switch can remain effective in the first superframe after the frequency number switch, and the scheduling signaling does not need to be transmitted again.

[0404] In one possible implementation, the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0405] Optionally, the length of the superframe is 1 ms. Since the synchronization signal is usually located at a fixed time position within the superframe, the duration of the synchronization signal is the same as the length of the superframe. That is, the duration of the synchronization signal is 1 ms.

[0406] In the implementation described above, the interval between the start of the first superframe and the start of the second superframe is 0 milliseconds or a positive integer millisecond. This environment ensures that the superframe boundaries and the position of the synchronization signal do not change during the operating frequency number switching process, reduces changes in the device configuration parameters, and simplifies the execution of timing synchronization between the first and second nodes.

[0407] In some scenarios, step S403 is optional. Specifically, the first node may transmit data and / or signaling on the second frequency number, or it may not transmit data and / or signaling on the second frequency number. For example, the first node may fail (e.g., power off) after transmitting the first physical layer control signaling, in which case it will not perform data transmission on the second frequency number. In another example, if the first node does not switch to the second frequency number after transmitting the first physical layer control signaling, the second frequency number is pre-empted, and in this case the first node needs to re-determine the destination frequency number for switching. In yet another example, before switching to the second frequency number, the first node detects a frequency number more suitable for communication as the destination frequency number for switching.

[0408] In one possible implementation, the first identifier may be used in multiple frequency number switching processes. That is, after the first node transmits the first identifier to the second node, in subsequent operational frequency number switching processes, the signaling indicating the frequency number switching may be scrambled by using the same first identifier. Thus, after the first identifier is configured using higher-layer signaling, the frequency number switching may be indicated by using physical layer control signaling only once. This further reduces the signaling interaction in the frequency number switching process and shortens the frequency number switching time, so that the first node can switch to the second frequency number as quickly as possible for communication. This improves the transmission performance of the communication network.

[0409] For example, after switching the operating frequency number to a second frequency number, the first node may further switch the frequency number to a third frequency number. Specifically, the first node transmits a second physical layer control signaling at the operating frequency number (i.e., the second frequency number), the second physical layer control signaling indicates a switch in the operating frequency number to the third frequency number, and some or all of the information bits in the second physical layer control signaling are scrambled by using the first identifier. In the implementation described above, when switching the operating frequency number to the third frequency number, the first node may indicate the frequency number switch by using the physical layer control signaling once. This shortens the time duration of the frequency number switch and improves the transmission performance of the communication network.

[0410] In the embodiment shown in Figure 4, the first node constitutes a first identifier for the second node by using higher-layer signaling. When switching frequency numbers, the first node scrambles the physical layer control signaling indicating the frequency number switch by using the first identifier, and completes the operational frequency number switch instruction by using the first identifier and the physical layer control signaling. This shortens the frequency number switch time so that the first node can switch to the second frequency number as quickly as possible for communication, improving the transmission performance of the communication network.

[0411] In the embodiment shown in Figure 4, there are several possible designs for the information in the first physical layer control signaling. For ease of understanding, Table 2 shows an exemplary format of the information in the first physical layer control signaling according to one embodiment of the present application.

[0412] [Table 2A] [Table 2B]

[0413] The embodiment shown in Figure 4 illustrates a strategy for constructing the first identifier by using higher-layer signaling. In a particular implementation process, the first identifier may alternatively be predetermined (for example, specified in a protocol) or pre-configured in the first and second nodes. The following describes an implementation strategy in which the first and second nodes obtain the first identifier in advance. For related concepts, operations, or logical relationships not described below, please refer to the corresponding descriptions in the embodiment shown in Figure 4.

[0414] Figure 9 is a schematic flowchart of a communication method according to one embodiment of the present application. Optionally, this method may be implemented based on the communication system shown in Figure 3. The communication method shown in Figure 9 may include one or more of steps S901 to S904. Steps S901 to S904 are specifically as follows:

[0415] Step S901: The first node transmits a first physical layer control signal at a certain operating frequency number.

[0416] The operating frequency number is the first frequency number. Correspondingly, the second node receives the first physical layer control signaling at that operating frequency number.

[0417] The first node obtains a first identifier in advance, and some or all of the information bits in the first physical layer control signaling are scrambled using the first identifier. If the second node also obtains a first identifier in advance, the second node descrambles the first physical layer control signaling using the first identifier, that is, it obtains the functionality of the first physical layer control signaling, obtains the data content of the first physical layer control signaling based on the data format of the first physical layer control signaling, and thus can receive instructions for switching the operating frequency number.

[0418] For a detailed explanation, please refer to the explanation in step S402.

[0419] Step S902 (optional): The first node communicates with the second node using the second frequency number.

[0420] In response, the second node communicates with the first node using a second frequency number.

[0421] For example, the first node sends data and / or signaling to the second node on the second frequency number. In another example, the first node receives data and / or signaling from the second node on the second frequency number.

[0422] For a detailed explanation, please refer to the explanation in step S403.

[0423] It should be understood that the first identifier may be used in multiple frequency number switching processes. That is, the communication method shown in Figure 9 further includes step S903.

[0424] Step S903 (optional): The first node transmits a second physical layer control signal at a certain operating frequency number.

[0425] The operating frequency number is the second frequency number. Correspondingly, the second node receives the second physical layer control signaling at that operating frequency number.

[0426] The second physical layer control signaling indicates a switch in the operating frequency number to a third frequency number, and some or all of the information bits in the second physical layer control signaling are scrambled by using the first identifier.

[0427] The 2For information regarding the physical layer control signaling, transmission method, and actual transmission, please refer to the relevant explanation of the second physical layer control signaling in step S402.

[0428] In some scenarios, step S903 is included in step S902.

[0429] Step S904 (optional): The first node communicates with the second node on the third frequency number.

[0430] In response, the second node communicates with the first node using a third frequency number.

[0431] For example, the first node sends data and / or signaling to the second node on a third frequency number. In another example, the first node receives data and / or signaling from the second node on a third frequency number.

[0432] In the embodiment shown in Figure 9, the first and second nodes acquire a first identifier in advance. When switching frequency numbers, the first node uses the first identifier to scramble the physical layer control signaling indicating the frequency number switch, and uses the first identifier and the physical layer control signaling to complete the instruction for the operational frequency number switch. This shortens the time length of the frequency number switch, so that the first node can switch to the second frequency number as quickly as possible for communication. This improves the transmission performance of the communication network.

[0433] The embodiment of the method shown in Figure 4 includes many possible implementations. Some of these implementations are described below using examples from Figures 10 and 11. Note that for any related concepts, operations, or logical relationships not described in Figures 10 and / or 11, refer to the corresponding descriptions of the embodiments shown in Figure 4.

[0434] Figure 10 is a schematic flowchart of a communication method according to one embodiment of the present application. Optionally, the method may be implemented based on the communication system shown in Figure 3. The communication method shown in Figure 10 may include steps S1001 to S1003, which are specifically as follows:

[0435] Step S1001: The first node sends a signaling signal from a higher layer. In response, the second node receives the signaling signal from a higher layer.

[0436] For a detailed explanation, please refer to step S401.

[0437] Step S1002: The first node transmits a first physical layer control signaling at a certain operating frequency number. Correspondingly, the second node receives the first physical layer control signaling at the same operating frequency number as the first frequency number.

[0438] Optionally, the first physical layer control signaling includes a preamble instruction, which indicates that the first node transmits preamble information at a second frequency number.

[0439] Alternatively, optionally, the first physical layer control signaling includes a switching interval instruction, which is greater than a third value. When the third value is also greater, the switching interval instruction indicates that the first node transmits preamble information at a second frequency number.

[0440] For a detailed explanation, please refer to the explanation in step S402.

[0441] Step S1003: The first node transmits preamble information at its operating frequency number. In response, the second node receives preamble information from the first node at its operating frequency number. The operating frequency number of the second node is the second node's frequency number.

[0442] The second node obtains the channel state based on the preamble information and performs synchronization with the first node. In addition, the second node uses the preamble information From this, changes to communication domain configuration information, such as changes to the random access resource pool configuration or SRS resource pool configuration, can be obtained. In this environment, the second node does not need to re-access the first node. This avoids interruptions in service transmission between the first and second nodes and improves transmission performance.

[0443] In the embodiment shown in Figure 10, the switching interval instruction and / or preamble instruction may be used to flexibly regulate and control the operation of the second node. This improves the stability of the communication system and enhances transmission performance.

[0444] Figure 11 is a schematic flowchart of a communication method according to one embodiment of the present application. Optionally, the method may be implemented based on the communication system shown in Figure 3. The communication method shown in Figure 11 may include steps S1101 to S1103, which are specifically as follows:

[0445] Step S1101: The first node sends higher layer signaling. In response, the second node receives higher layer signaling.

[0446] For a detailed explanation, please refer to step S401.

[0447] Step S1102: The first node sends the first physical layer control signaling. In response, the second node receives the first physical layer control signaling.

[0448] Optionally, the first physical layer control signaling includes a reaccess instruction, and the reaccess instruction is the 2 This indicates that the node will perform the access operation.

[0449] For a detailed explanation, please refer to the explanation in step S402.

[0450] Step S1103: The second node sends an access request to the first node. In response, the first node receives an access request from the second node.

[0451] Specifically, the second node performs an action to re-access the first node based on the re-access instruction. Sending an access request is a step in the access action performed by the second node.

[0452] In addition, the embodiment shown in Figure 11 may be compatible with nodes having different performance characteristics. This improves communication stability. For example, a reaccess procedure may be performed for a node with low frequency number switching capability in order to continue communication with the first node.

[0453] The above describes in detail the method in the embodiment of this application. The following provides the apparatus in the embodiment of this application.

[0454] To implement the functions in the above-described embodiments of the method, it can be understood that the multiple devices provided in the embodiments of this application, such as communication devices, include corresponding hardware structures, software units, or combinations of hardware and software structures for performing the functions. In combination with the examples described in the embodiments disclosed herein, those skilled in the art will readily recognize that the units, algorithms, and steps may be implemented by the hardware or combinations of hardware and computer software in the embodiments of this application. Whether the functions are performed by hardware or by hardware driven by computer software depends on the specific application and the specific design constraints of the technical measures. Those skilled in the art may implement the above-described embodiments of the method by using different implementations of the devices in different usage scenarios. The various implementations of the devices should not be considered beyond the scope of the embodiments of this application.

[0455] In embodiments of this application, the device may be divided into functional units. For example, functional units may be obtained through division based on corresponding functions, or two or more functions may be integrated into a single functional unit. The integrated module may be implemented in hardware form or in the form of a software functional unit. Note that in this embodiment of this application, the division into units is illustrative and merely a logical division of functions. In actual implementations, other division methods may be used.

[0456] The following is a list of some possible devices.

[0457] Figure 12 is a diagram illustrating the structure of a communication device 120 according to one embodiment of the present application. Optionally, the communication device 120 may be an independent device, such as a node. Alternatively, the communication device 120 may be a component within an independent device (e.g., a node), such as a chip or integrated circuit. The communication device 120 is configured to implement the communication methods described above, for example, the communication methods shown in Figures 4, 9, 10, or 11.

[0458] In one possible design, the communication device 120 is configured to implement the first node-side method in the communication method described above.

[0459] In another possible implementation, the first communication unit 1201 is configured to transmit higher layer signaling, which includes a first identifier. The second communication unit 1202 is configured to transmit a first physical layer control signaling at a certain operating frequency number, some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier, the operating frequency number of which is the first frequency number, and the first physical layer control signaling indicates a switch in the operating frequency number of the first node to a second frequency number.

[0460] In one possible implementation, the first identifier corresponds to the frequency number switching function.

[0461] In another possible implementation, the first physical layer control signaling includes a function indicator field, which indicates that the first identifier corresponds to a frequency number switching function.

[0462] In yet another possible implementation, some of the information bits in the first physical layer control signaling include the cyclic redundancy check (CRC) code of the first physical layer control signaling.

[0463] In yet another possible implementation, the resources for transmitting the first physical layer control signaling belong to a pre-configured common physical layer control signaling resource.

[0464] In yet another possible implementation, the communication device 120 further includes a third communication unit 1204, the third communication unit 1204 being configured to communicate with at least one second node on a second frequency number.

[0465] In yet another possible implementation, the superframe sequence numbers of the first and second superframes are consecutive, with the first superframe being the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe being the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node has been switched from the first frequency number to the second frequency number.

[0466] In other words, the superframe sequence numbers of the superframe are consecutive before and after the switching of the operating frequency number.

[0467] In yet another possible implementation, the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0468] In yet another possible implementation, the first physical layer control signaling includes one or more pieces of information such as a second frequency number identifier, an indication of the moment of frequency number switching, a reaccess indication, a switching interval indication, or a preamble indication.

[0469] In yet another possible implementation, the first physical layer control signaling includes a second frequency number identifier. The second frequency number identifier indicates the destination frequency number for switching and may include, but is not limited to, a frequency number sequence number, a frequency number index number, or a channel number.

[0470] In yet another possible implementation, the first physical layer control signaling includes an indication of the moment of frequency number switching. The indication of the moment of switching indicates an opportunity to switch the operating frequency number.

[0471] In one possible configuration, the indication of the frequency number switching moment indicates the moment when the first node begins switching the operating frequency number, for example, the superframe sequence number of the last superframe used by the first node for transmission at the current operating frequency number, or the relative offset of the last superframe used by the first node for transmission at the current operating frequency number to the superframe for transmitting the first physical layer control signaling.

[0472] In another possible configuration, the indication of the frequency number switching moment would indicate the start moment when transmission begins at the second frequency number, for example, the superframe sequence number of the first superframe used by the first node for transmission at the second frequency number, or the relative offset of the start moment of the first superframe used by the first node for transmission at the second frequency number to the start moment of the superframe for transmitting the first physical layer control signaling.

[0473] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0474] In yet another possible implementation, the first physical layer control signaling includes a reaccess instruction. The reaccess instruction is directive information indicating whether a second node needs to perform a reaccess.

[0475] In some possible scenarios, a reaccess instruction would instruct a second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration would remain unchanged, or be changed only slightly, or only changes would be made to communication domain system configurations that do not affect the current transmission scheduling (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration). This avoids reaccess by the second node and prevents the current scheduling from being invalidated.

[0476] In yet another possible implementation, when the first value is present, the reaccess instruction instructs the second node to perform the access operation at the second frequency number.

[0477] In yet another possible implementation, when the value is second, the reaccess instruction tells the second node to maintain the current access state or not to perform the access operation.

[0478] In yet another possible implementation, the first physical layer control signaling includes a switching interval instruction, where the switching interval indicates the time interval between the first superframe and the second superframe.

[0479] Optionally, the switching interval can be set to the following time intervals, i.e. This may include one or more of the following: the time interval between the end of the first superframe and the start of the second superframe; the time interval between the start of the first superframe and the start of the second superframe; the time interval between the end of the first superframe and the end of the second superframe; and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0480] In yet another possible implementation, the switching interval instruction further indicates whether the communication device transmits preamble information on a second frequency number.

[0481] In yet another possible implementation, the communication device 120 does not transmit preamble information on the second frequency number. This shortens the interval between the last superframe before the switch and the first superframe after the switch, thereby reducing the switching time spent.

[0482] In yet another possible implementation, the communication device 120 further includes a third communication unit 1204, the third communication unit 1204 is The system is configured to transmit preamble information at a second frequency number when the switching interval instruction is greater than a third value.

[0483] Optionally, when the switching interval instruction is less than the third value, the communication device 120 does not transmit preamble information at the second frequency number.

[0484] When the switching interval is equal to the third value, the communication device 120 does not need to transmit preamble information at the second frequency number, or does not need to transmit preamble information at all; it should be understood that this depends on the specific implementation.

[0485] In yet another possible implementation, when the switching interval instruction is 0, the communication device 120 does not transmit preamble information at the second frequency number, or when the switching interval instruction is greater than 0, the communication device 120 transmits preamble information at the second frequency number.

[0486] In yet another possible implementation, the first physical layer control signaling includes a preamble instruction, which indicates that the communication device 120 will transmit preamble information on a second frequency number, or that the communication device 120 will not transmit preamble information on a second frequency number.

[0487] Optionally, the communication device 120 includes a third communication unit 1204, which is configured to transmit preamble information at a second frequency number when the preamble instruction is a fourth value.

[0488] Optionally, when the preamble indication is the fifth value, the communication device 120 does not transmit preamble information at the second frequency number.

[0489] In yet another possible implementation, when the switching interval indicates whether preamble information is to be sent, the first physical layer control signaling does not need to carry additional preamble instructions.

[0490] In yet another possible implementation, the first identifier may be used in multiple frequency number switching processes. That is, after the communication device 120 transmits the first identifier to the second node, subsequent signaling indicating frequency number switching in multiple operating frequency number switching processes may be scrambled by using the same first identifier.

[0491] In yet another possible implementation, the second communication unit 1202 further, The system is configured to transmit a second physical layer control signaling at a certain operating frequency number, the second physical layer control signaling indicating a switch of the operating frequency number to a third frequency number, some or all of the information bits in the second physical layer control signaling are scrambled using a first identifier, and the operating frequency number is the second frequency number.

[0492] In yet another possible implementation, the communication device 120 further includes a fourth communication unit 1205, the fourth communication unit 1205 configured to receive frequency number capability information of at least one second node, the frequency number capability information including one or more of supported frequency numbers, supported switching intervals, etc.

[0493] Optionally, the second frequency number belongs to the frequency numbers supported by the second frequency number.

[0494] In yet another possible implementation, the communication device 120 further includes a processing unit 1203, which is configured to determine a switching interval based on frequency number capability information reported by at least one second node.

[0495] In yet another possible implementation, the first physical layer control signaling is transmitted via broadcast and / or multicast.

[0496] In yet another possible implementation, the communication device 120 transmits physical layer control signaling multiple times in multiple superframes separately to indicate the same frequency number switching.

[0497] In yet another possible implementation, the second communication unit 1202 further, The first physical layer control signaling is transmitted in the third superframe at the operating frequency number, and the operating frequency number is the first frequency number. The system is configured to transmit a third physical layer control signaling in the fourth superframe at an operating frequency number, with some or all of the information bits in the third physical layer control signaling scrambled using a first identifier, where the operating frequency number is the first frequency number, and the third physical layer control signaling indicates a switch of the operating frequency number of the first node to the second frequency number.

[0498] In yet another possible implementation, the first physical layer control signaling belongs to one of several physical layer control signalings, and these several physical layer control signalings further include a fourth physical layer control signaling, with the length of the first physical layer control signaling being the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from the function of the fourth physical layer control signaling.

[0499] In one possible design, the communication device 120 is configured to implement the second node-side method in the communication method described above.

[0500] In one possible implementation of the fourth aspect, the first communication unit 1201 is configured to receive higher layer signaling from the first node, the higher layer signaling includes a first identifier, The second communication unit 1202 is configured to receive a first physical layer control signaling at a certain operating frequency number, wherein some or all of the information bits in the first physical layer control signaling are scrambled using a first identifier, and the operating frequency number is the first frequency number. The first physical layer control signaling indicates a switch in the operating frequency number of the first node to the second frequency number.

[0501] In another possible implementation, the first identifier corresponds to the frequency number switching function.

[0502] In yet another possible implementation, the first physical layer control signaling includes a function indicator field, which indicates that the first identifier corresponds to a frequency number switching function.

[0503] In yet another possible implementation, some of the information bits in the first physical layer control signaling include the cyclic redundancy check (CRC) code of the first physical layer control signaling.

[0504] In yet another possible implementation, the resources for transmitting the first physical layer control signaling belong to a pre-configured common physical layer control signaling resource.

[0505] In yet another possible implementation, the communication device 120 further includes a processing unit 1203 and a third communication unit 1204. The processing unit 1203 is further configured to descramble some or all of the information bits in the first physical layer control signaling by using a first identifier. The third communication unit 1204 is further configured to communicate with the first node on a second frequency number.

[0506] When all information bits in the first physical layer control signaling are scrambled using a first identifier, it should be understood that the processing unit descrambles all information bits in the first physical layer control signaling using the first identifier.

[0507] When some information bits in the first physical layer control signaling are scrambled by using a first identifier, the processing unit descrambles some information bits in the first physical layer control signaling by using the first identifier.

[0508] In yet another possible implementation, the superframe sequence numbers of the first and second superframes are consecutive, with the first superframe being the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe being the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node has been switched from the first frequency number to the second frequency number.

[0509] In other words, the superframe sequence numbers of the superframe are consecutive before and after the switching of the operating frequency number.

[0510] In yet another possible implementation, the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

[0511] In yet another possible implementation, the first physical layer control signaling includes one or more pieces of information such as a second frequency number identifier, an indication of the moment of frequency number switching, a reaccess indication, a switching interval indication, or a preamble indication.

[0512] In yet another possible implementation, the first physical layer control signaling includes a second frequency number identifier. The second frequency number identifier indicates the destination frequency number for switching and may include, but is not limited to, a frequency number sequence number, a frequency number index number, or a channel number.

[0513] In yet another possible implementation, the first physical layer control signaling includes an indication of the moment of frequency number switching. The indication of the moment of switching indicates an opportunity to switch the operating frequency number.

[0514] In one possible configuration, the indication of the frequency number switching moment indicates the moment when the first node begins switching the operating frequency number, for example, the superframe sequence number of the last superframe used by the first node for transmission at the current operating frequency number, or the relative offset of the last superframe used by the first node for transmission at the current operating frequency number to the superframe for transmitting the first physical layer control signaling.

[0515] In another possible configuration, the indication of the frequency number switching moment would indicate the start moment when transmission begins at the second frequency number, for example, the superframe sequence number of the first superframe used by the first node for transmission at the second frequency number, or the relative offset of the start moment of the first superframe used by the first node for transmission at the second frequency number to the start moment of the superframe for transmitting the first physical layer control signaling.

[0516] Optionally, the offset in the above-described method may be in superframes, milliseconds (ms), or microseconds (μs).

[0517] In yet another possible implementation, the first physical layer control signaling includes a reaccess instruction. The reaccess instruction is directive information indicating whether a second node needs to perform a reaccess.

[0518] In some possible cases, a reaccess instruction will instruct the second node not to perform a reaccess operation. For example, during a frequency number switch, the communication domain system configuration will not be changed, or will be changed only slightly, or only communication domain system configurations that do not affect the scheduling of the current transmission (e.g., random access resource pool configuration or channel sounding reference signal resource pool configuration) will be changed. This avoids reaccess for the second node and prevents the invalidation of the current scheduling.

[0519] In yet another possible implementation, the communication device 120 further includes a third communication unit 1204, which is configured to perform a reaccess operation when the reaccess instruction is a first value.

[0520] In yet another possible implementation, when the value is second, the reaccess instruction tells the second node to maintain the current access state or not to perform the access operation.

[0521] In yet another possible implementation, the first physical layer control signaling includes a switching interval instruction, where the switching interval indicates the time interval between the first superframe and the second superframe.

[0522] Optionally, the switching interval can be set to the following time intervals, i.e. This may include one or more of the following: the time interval between the end of the first superframe and the start of the second superframe; the time interval between the start of the first superframe and the start of the second superframe; the time interval between the end of the first superframe and the end of the second superframe; and the time interval between the synchronization signal in the first superframe and the synchronization signal in the second superframe.

[0523] In yet another possible implementation, the switching interval instruction further indicates whether the first node transmits preamble information at the second frequency number.

[0524] Based on the switching interval instruction, the communication device 120 may decide whether to receive preamble information from the first node at a second frequency number.

[0525] In yet another possible implementation, the communication device 120 further includes a third communication unit 1204, which is configured to receive preamble information from the first node at a second frequency number when the switching interval instruction is greater than a third value.

[0526] In yet another possible implementation, when the switching interval indicator is 0, it indicates that the first node will not transmit preamble information at the second frequency number, or when it is a value greater than 0, it indicates that the first node will transmit preamble information at the second frequency number.

[0527] The communication device 120 further includes a third communication unit 1204, which is configured to receive preamble information from the first node at a second frequency number when the switching interval instruction is greater than 0.

[0528] In yet another possible implementation, the first physical layer control signaling includes a preamble instruction, which indicates that the first node will transmit preamble information at a second frequency number, or that the first node will not transmit preamble information at a second frequency number.

[0529] Optionally, the third communication unit 1204 is configured to receive preamble information from the first node at a second frequency number when the preamble instruction is a fourth value.

[0530] In yet another possible implementation, when the switching interval indicates whether preamble information is to be sent, the first physical layer control signaling does not need to carry additional preamble instructions.

[0531] In yet another possible implementation, the first identifier may be used in multiple frequency number switching processes.

[0532] In yet another possible implementation, the second communication unit 1202 further, The operating frequency number is configured to receive a second physical layer control signaling from a first node, the second physical layer control signaling indicating a switch of the operating frequency number to a third frequency number, some information bits in the second physical layer control signaling are scrambled using a first identifier, and the operating frequency number is the second frequency number.

[0533] In yet another possible implementation, the communication device 120 further includes a fourth communication unit 1205, the fourth communication unit configured to transmit frequency number capability information of a second node to the first node, the frequency number capability information of the second node indicating the frequency numbers supported by the second node.

[0534] Optionally, the second frequency number belongs to the frequency numbers supported by the second frequency number.

[0535] Optionally, frequency number capability information is used to determine the switching interval.

[0536] In yet another possible implementation, the first physical layer control signaling is transmitted via broadcast and / or multicast.

[0537] In yet another possible implementation, the communication device 120 does not send feedback indicating whether it has successfully detected the first physical layer control signaling.

[0538] In yet another possible implementation, the second communication unit 1202 further, The first physical layer control signaling is received in the third superframe at the operating frequency number, and the operating frequency number is the first frequency number, The system is configured to receive the third physical layer control signaling in the fourth superframe at the operating frequency number, with some or all of the information bits in the third physical layer control signaling scrambled using the first identifier, the operating frequency number being the first frequency number, and the third physical layer control signaling indicating a switch of the operating frequency number of the first node to the second frequency number.

[0539] In yet another possible implementation, the first physical layer control signaling belongs to one of several physical layer control signalings, and these several physical layer control signalings further include a fourth physical layer control signaling, with the length of the first physical layer control signaling being the same as the bit length of the fourth physical layer control signaling. The function of the first physical layer control signaling is different from the function of the fourth physical layer control signaling.

[0540] In the implementation described above, the bit length of the first physical layer control signaling is the same as the bit length of another type of physical layer control signaling that indicates a different function. In other words, the bit length of the first physical layer control signaling belongs to the existing bit length.

[0541] Figure 13 shows the structure of a possible communication device 130 according to one embodiment of the present application.

[0542] The communication device 130 may be an independent device, such as a node, or a component included in an independent device, such as a chip, a software module, or an integrated circuit. The communication device 130 may include at least one processor 1301 and a communication interface 1302. Optionally, it may include at least one memory 1303. Furthermore, optionally, it may include a connection line 1304. To transmit control signals and / or data signals, the processor 1301, the communication interface 1302, and / or the memory 1303 are connected through the connection line 1304 and / or communicate with each other through the connection line 1304.

[0543] (1) The processor 1301 is a module for performing arithmetic and / or logical operations, and may specifically include one or more modules such as filters, modems, power amplifiers, low noise amplifiers (LNAs), baseband processors, radio frequency processors, radio frequency circuits, central processing units (CPUs), application processors (APs), microcontroller units (MCUs), electronic control units (ECUs), graphics processing units (GPUs), microprocessor units (MPUs), application-specific integrated circuits (ASICs), image signal processors (ISPs), digital signal processors (DSPs), field programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), and coprocessors.

[0544] (2) The communication interface 1302 may be configured to provide information input or output for at least one processor, or to receive signals transmitted from an external source and / or transmit signals to an external source.

[0545] For example, the communication interface 1302 may include an interface circuit.

[0546] For example, the communication interface 1302 may be a wired link interface including an Ethernet cable, or it may be a wireless link interface (such as Wi-Fi, Bluetooth®, general-purpose wireless transmission, onboard short-range communication technology, or another short-range wireless communication technology).

[0547] Optionally, the communication interface 1302 may further include a radio frequency transmitter, an antenna, and the like. When the communication interface 1302 includes an antenna, there may be one or more antennas.

[0548] In one possible design, if the communication device 130 is a separate device, the communication interface 1302 may include a receiver and a transmitter. The receiver and transmitter may be the same component or different components. When the receiver and transmitter are the same component, that component may be called a transceiver.

[0549] In another possible design, if the communication device 130 is a chip or circuit, the communication interface 1302 may include an input interface and an output interface, and the input interface and the output interface may be the same interface or different interfaces.

[0550] Optionally, the functionality of the communication interface 1302 may be implemented through a transceiver circuit or a dedicated transceiver chip.

[0551] (3) The memory 1303 is configured to provide a storage space, which can store data such as an operating system and computer programs. The memory 1303 may be one or a combination of random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), compact disc read-only memory (CD-ROM), etc.

[0552] The functions and actions of the modules or units in the communication device 130 listed above are merely illustrative examples.

[0553] The functional units within the communication device 130 may be configured to implement the communication methods described above, for example, the communication methods shown in Figures 4, 9, 10, or 11. A detailed explanation is omitted here to avoid repetition.

[0554] Optionally, processor 1301 may be a processor specifically configured to perform the method described above (referred to as a dedicated processor for simplicity of distinction), or a processor that calls a computer program to perform the method described above (referred to as a dedicated processor for simplicity of distinction). Optionally, at least one processor may further include both a dedicated processor and a general-purpose processor.

[0555] If the communication device 130 optionally includes at least one memory 1303, and the processor 1301 calls a computer program for performing the above-described communication method, the computer program may be stored in the memory 1303.

[0556] One embodiment of this application further provides a chip comprising logic circuits and a communication interface. The communication interface is configured to receive or transmit signals, and the logic circuits are configured to receive or transmit signals through the communication interface. The chip is configured to carry out the communication methods described above, for example, the methods of Figures 4, 9, 10, or 11.

[0557] One embodiment of this application further provides a computer-readable storage medium that stores instructions. When an instruction is executed on at least one processor (or communication device), the communication method described above, for example, the method shown in Figures 4, 9, 10, or 11, is carried out.

[0558] One embodiment of this application further provides a computer program product. The computer program product includes computer instructions, and calculation instructions are used to carry out the communication method described above, for example, the method shown in Figures 4, 9, 10, or 11.

[0559] One embodiment of this application further provides a terminal, which includes the communication device 120 or communication device 130 described above.

[0560] In one possible implementation, the terminal includes a first node and / or a second node. The first node includes the aforementioned communication device 120 or communication device 130, and the second terminal includes the aforementioned communication device 120 or communication device 130.

[0561] The terminal could be a smart device, or a transport vehicle such as a car, unmanned aerial vehicle, or robot.

[0562] In embodiments of this application, the terms “example” or “for example” are used to indicate that an example, illustration, or explanation is being given. No embodiment or design described as “example” or “for example” in this application should be described as preferable to or having more advantages than other embodiments or design designs. More precisely, the use of words such as “example” or “for example” is intended to present a relative concept in a particular manner.

[0563] In the embodiments of this application, "at least one" means one or more, and "multiple" means two or more. "At least one of the following items (fragments)" or similar expressions refer to any combination of these items, including any combination of singular or plural items (fragments).

[0564] For example, at least one of a, b, or c may represent a, b, c, (a and b), (a and c), (b and c), or (a, b and c), where a, b, and c can be singular or plural. The term "and / or" describes an association between related objects and indicates that three relationships may exist. For example, A and / or B may represent three cases: A only exists, both A and B exist, or B only exists, where A and B can be singular or plural. The letter " / " generally indicates an "or" relationship between related objects.

[0565] In addition, unless otherwise stated, the sequential numbers such as "first" and "second" in the embodiments of this application are for distinguishing multiple subjects and are not intended to limit the order, chronological order, priority, or importance of the multiple subjects.

[0566] For example, the first physical layer control signaling and the second physical layer control signaling are intended solely to facilitate the explanation of different signalings and do not indicate any differences in structure, transmission method, importance, etc., between the first and second physical layer control signalings. In some embodiments, the first and second physical layer control signalings may, alternatively, be physical layer control signalings with the same data content.

[0567] In another example, the first, second, third, and fourth superframes are intended solely to facilitate the explanation of superframes in different implementations and do not represent differences in structure, transmission method, importance, etc. In some possible scenarios, the fourth and second superframes may be the same superframe.

[0568] In this context, the term “when” as used in the embodiments described above may be interpreted as “in the case,” “after,” “in response to a decision,” or “in response to a detection.” The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the concepts and principles of the present application shall be within the scope of protection of the present application.

[0569] Those skilled in the art will understand that all or part of the steps of the embodiment may be implemented by hardware or by a program that instructs the relevant hardware. The program may be stored on a computer-readable storage medium, such as read-only memory, magnetic disks, or optical disks. [Explanation of Symbols]

[0570] 120 Communication equipment 130 Communication equipment 301 First node 302 First Node 801 Physical Layer Control Signaling 802 Physical Layer Control Signaling 803 Physical Layer Control Signaling 1201 First communication unit 1202 Second communication unit 1203 Processing Unit 1204 Third communication unit 1205 Fourth communication unit 1301 Processor 1302 Communication Interface 1303 memory 1304 Connecting Line

Claims

1. A method of communication, A step of transmitting a higher layer signaling by a first node, wherein the higher layer signaling comprises a first identifier. A step of transmitting a first physical layer control signaling at a certain operating frequency number by the first node, wherein some or all of the information bits in the first physical layer control signaling are scrambled using the first identifier, the operating frequency number is the first frequency number, and the first physical layer control signaling indicates a switch of the operating frequency number of the first node to a second frequency number. Includes, A method wherein the first physical layer control signaling comprises a function instruction field, the function instruction field indicating that the first identifier corresponds to a frequency number switching function.

2. The method according to claim 1, wherein the first identifier corresponds to a frequency number switching function.

3. The method according to claim 1, wherein some of the information bits include a cyclic redundancy check (CRC) code for the first physical layer control signaling.

4. The method according to claim 1, wherein the resource that carries the first physical layer control signaling belongs to a pre-configured common physical layer control signaling resource.

5. After the step of transmitting the first physical layer control signaling, the method, The method according to claim 1, further comprising the step of the first node communicating with at least one second node on the second frequency number.

6. The superframe sequence numbers of the first superframe and the second superframe are consecutive. The method according to claim 1, wherein the first superframe is the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe is the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node is switched from the first frequency number to the second frequency number.

7. The first physical layer control signaling includes a superframe sequence number continuity indicator, which indicates whether it is guaranteed that the superframe sequence numbers of the first superframe and the second superframe are continuity. The method according to claim 1, wherein the first superframe is the last superframe for transmitting data and / or signaling at the first frequency number before the operating frequency number of the first node is switched from the first frequency number to the second frequency number, and the second superframe is the first superframe for transmitting data and / or signaling at the second frequency number after the operating frequency number of the first node is switched from the first frequency number to the second frequency number.

8. The method according to claim 6, wherein the interval between the end of the first superframe and the beginning of the second superframe is N milliseconds, where N is an integer and N ≥ 0.

9. The method according to claim 6, wherein the first physical layer control signaling includes a switching interval instruction, and the switching interval instruction indicates a time interval between the first superframe and the second superframe.

10. The method described above is The method according to claim 9, further comprising the step of transmitting preamble information to at least one second node at the second frequency number by the first node when the switching interval instruction is greater than a third value.

11. The first physical layer control signaling described above uses the following information, namely: The identifier of the second frequency number, the instruction for the moment of frequency number switching, the reaccess instruction, or the preamble instruction. The method according to claim 1, comprising one or more of the above.

12. The first physical layer control signaling includes the re-access instruction, When the first value is present, the reaccess instruction instructs at least one second node to perform an access operation at the second frequency number, or The method according to claim 11, wherein, when the value is a second value, the re-access instruction instructs at least one second node to maintain the current access state or not perform an access operation.

13. The method according to claim 11, wherein the first physical layer control signaling includes the preamble instruction, the preamble instruction indicating that the first node transmits preamble information at the second frequency number, or that the first node does not transmit the preamble information at the second frequency number.

14. The method described above is The method according to claim 1, further comprising the step of transmitting a second physical layer control signaling at a certain operating frequency number by the first node, wherein the second physical layer control signaling indicates a switch of the operating frequency number to a third frequency number, and some or all of the information bits in the second physical layer control signaling are scrambled by using the first identifier, the operating frequency number being the second frequency number.

15. The method described above is The method according to claim 1, further comprising the step of receiving frequency number capability information of at least one second node by the first node, wherein the frequency number capability information of the at least one second node indicates frequency numbers supported by the at least one second node.

16. The method according to claim 1, wherein the first physical layer control signaling is transmitted in a broadcast and / or multicast manner.

17. The first node transmits a first physical layer control signal at a certain operating frequency number. The first node transmits the first physical layer control signaling in a third superframe at the operating frequency number, the step comprising the step of the operating frequency number being the first frequency number, The method described above is The method according to claim 1, further comprising the step of transmitting a third physical layer control signaling in a fourth superframe at a certain operating frequency number by the first node, wherein some or all of the information bits in the third physical layer control signaling are scrambled by using the first identifier, the operating frequency number is the first frequency number, and the third physical layer control signaling indicates a switch of the operating frequency number of the first node to the second frequency number.

18. A communication device, Equipped with logic circuits and communication interfaces, The communication interface is configured to receive or transmit signals, The logic circuit is configured to receive or transmit a signal through the communication interface so that the method described in any one of claims 1 to 17 is carried out, The communication device is either the first node or a module within the first node.

19. A terminal device, The communication device is as described in claim 18, The communication device is a module within the first node, and the terminal device is a terminal device which is the first node.

20. A computer-readable storage medium, A computer-readable storage medium configured to store instructions or computer programs, wherein when the instructions or computer programs are executed, the method according to any one of claims 1 to 17 is performed.

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