Communication method and apparatus

Abstract

A communication method and apparatus, which are used for configuring a time-domain resource and / or a frequency-domain resource of an SBFD sub-band, thereby improving the flexibility of SBFD configuration information. The method comprises: a terminal device receiving SBFD configuration information, which is from a network device, wherein the SBFD configuration information is used for configuring a time-domain resource and / or a frequency-domain resource of an SBFD sub-band; and then on the basis of first information, the terminal device determining that the SBFD configuration information has taken effect, wherein the first information is used for indicating that the SBFD configuration information has taken effect. By means of the method, after a network device configures a time-domain resource and / or a frequency-domain resource of an SBFD sub-band for a terminal device, the terminal device then determines a time for taking effect on the basis of first information, such that the activation of the time-domain resource and / or the frequency-domain resource of the SBFD sub-band can be flexibly controlled in various scenarios, thereby improving the flexibility of SBFD configuration information.

Description

Communication method and device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on February 8, 2024, with application number 202410178316.3 and application name "A Communication Method and Device", the entire contents of which are incorporated by reference into this application. Technical Field

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

[0004] The 5G new radio (NR) wireless communication system is deployed in the medium and high frequency bands, and uses large bandwidth to achieve high data rates and low latency. In a time division duplexing (TDD) system, the downlink (DL) usually occupies the main time resources, which causes a coverage imbalance between the DL and uplink (UL), resulting in poor uplink coverage and large latency in the TDD system. To address the uplink coverage and latency issues in the TDD system, the standard protocol R18 proposes a subband full duplex (SBFD) solution. In the SBFD solution, a carrier can be divided into multiple subbands, and the transmission directions of different subbands can be different. Under the SBFD solution, the uplink transmission resources available to terminal devices are increased, which can effectively improve uplink coverage and reduce uplink latency.

[0005] The SBFD solution requires configuring the time domain resources and frequency domain resources of the SBFD subband. However, there is currently no clear method for configuring the time domain resources and frequency domain resources of the SBFD subband. Summary of the Invention

[0006] Embodiments of the present application provide a communication method and apparatus for configuring time domain resources and / or frequency domain resources of an SBFD subband, thereby improving the flexibility of SBFD configuration information.

[0007] In a first aspect, the present application provides a communication method that can be applied to a terminal device, or a processor, chip, chip system, or a functional module in the terminal device. The method may include: receiving SBFD configuration information from a network device, where the SBFD configuration information is used to configure time domain resources and / or frequency domain resources of an SBFD subband; and determining, based on first information, that the SBFD configuration information is effective, where the first information is used to indicate that the SBFD configuration information is effective.

[0008] Through the above method, after the network device configures the time domain resources and / or frequency domain resources of the SBFD subband for the terminal device, the terminal device then determines the effective time based on the first information, and can flexibly control the effectiveness of the time domain resources and / or frequency domain resources of the SBFD subband in various scenarios, thereby improving the flexibility of the SBFD configuration information.

[0009] In one possible design, the SBFD configuration information may be received from the network device by: receiving a system information block (SIB) from the network device, the SIB including the SBFD configuration information. Transmitting the SBFD configuration information via the SIB may reduce signaling overhead.

[0010] In one possible design, the SBFD configuration information may include frequency domain resources for at least one group of SBFD subbands, where each group of frequency domain resources in the at least one group of SBFD subbands corresponds to a subcarrier spacing (SCS). A first group of SBFD subbands includes multiple subbands, and the first group of SBFD subbands is any one of the at least one group of SBFD subbands. This allows configuration of frequency domain resources for SBFD subbands that match various SCSs, thereby improving the compatibility and flexibility of SBFD.

[0011] In one possible design, frequency domain resources of any subband included in the first group of SBFD subbands are included in a first carrier, the first carrier corresponds to the first group of SBFD subbands, and the SCS corresponding to the frequency domain resources of the first group of SBFD subbands is the same as the SCS corresponding to the first carrier. This ensures resource alignment between the SBFD subbands and the edges of the corresponding carriers.

[0012] In one possible design, effective resources are determined based on an activated bandwidth part (BWP) and frequency-domain resources of a second group of SBFD subbands. The frequency-domain resources of the second group of SBFD subbands correspond to the same SCS as the SCS of the activated BWP, and the second group of SBFD subbands is one of the at least one group of SBFD subbands. This allows accurate determination of effective resources for data transmission, thereby improving data transmission accuracy.

[0013] In one possible design, the SBFD configuration information includes first indication information, where the first indication information is used to indicate a time slot position of the SBFD subband within a first time domain pattern, where the first time domain pattern corresponds to a first cycle length. Based on this, the time slot position of the SBFD subband within the first time domain pattern can be determined, thereby determining the time domain resources of the SBFD subband.

[0014] In one possible design, the first indication information is used to indicate the time slot position of the SBFD subband within the first time domain pattern, including: the first indication information is used to indicate the starting time slot and the first number of continuous time slots of the SBFD subband within the first time domain pattern; or, the first indication information is used to indicate the ending time slot and the second number of continuous time slots of the SBFD subband within the first time domain pattern; or, the first indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband within the first time domain pattern. Based on this method, the first indication information can indicate the time slot position of the SBFD subband within the first time domain pattern in a variety of ways, thereby improving indication flexibility.

[0015] In one possible design, the SBFD configuration information further includes second indication information, where the second indication information is used to indicate a symbol position of the SBFD subband within a time slot within the first time domain pattern. This can further determine the symbol position of the SBFD subband within the time slot within the first time domain pattern, thereby improving the accuracy of determining the time domain resources of the SBFD subband.

[0016] In one possible design, the second indication information is used to indicate the symbol position of the SBFD subband in the time slot within the first time domain pattern, including: the second indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the first time domain pattern, or the last M consecutive symbols in the starting time slot within the first time domain pattern, where M is a positive integer; and / or, the second indication information is used to indicate the ending symbol of the SBFD subband in the ending time slot within the first time domain pattern, or the consecutive N symbols starting in the ending time slot within the first time domain pattern, where N is a positive integer. Based on this method, the second indication information can indicate the symbol position of the SBFD subband in the time slot within the first time domain pattern in a variety of ways, thereby improving the indication flexibility.

[0017] In one possible design, the SBFD configuration information may further include third indication information, where the third indication information is used to indicate a time slot position of the SBFD subband within a second time domain pattern, where the second time domain pattern corresponds to a second cycle length. Based on this, the time slot position of the SBFD subband within the second time domain pattern may be determined, thereby determining the time domain resources of the SBFD subband.

[0018] In one possible design, the third indication information is used to indicate the time slot position of the SBFD subband within the second time domain pattern, including: the third indication information is used to indicate the starting time slot and the third number of continuous time slots of the SBFD subband within the second time domain pattern; or, the third indication information is used to indicate the ending time slot and the fourth number of continuous time slots of the SBFD subband within the second time domain pattern; or, the third indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband within the second time domain pattern. Based on this method, the third indication information can indicate the time slot position of the SBFD subband within the second time domain pattern in a variety of ways, thereby improving indication flexibility.

[0019] In one possible design, the SBFD configuration information further includes fourth indication information, where the fourth indication information is used to indicate a symbol position of the SBFD subband within a time slot within the second time domain pattern. This can further determine the symbol position of the SBFD subband within the time slot within the second time domain pattern, thereby improving the accuracy of determining the time domain resources of the SBFD subband.

[0020] In one possible design, the fourth indication information is used to indicate the symbol position of the SBFD subband in the time slot within the second time domain pattern, including: the fourth indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the second time domain pattern, or the last P consecutive symbols in the starting time slot within the second time domain pattern, where P is a positive integer; and / or, the fourth indication information is used to indicate the ending symbol of the SBFD subband in the ending time slot within the second time domain pattern, or the consecutive K symbols starting in the ending time slot within the second time domain pattern, where K is a positive integer. Based on this method, the fourth indication information can indicate the symbol position of the SBFD subband in the time slot within the second time domain pattern in a variety of ways, thereby improving the indication flexibility.

[0021] In one possible design, the time domain resources of the SBFD subband correspond to the reference SCS associated with the cell-specific uplink and downlink TDD configuration, so that the time domain resources of the SBFD subband and the time domain resources of TDD are compatible with each other.

[0022] In one possible design, the reference SCS is used to determine the time domain boundary of the SBFD subband.

[0023] In one possible design, a first RRC message is received from the network device, where the first RRC message includes the first information. Based on this method, the network device can explicitly indicate that the SBFD configuration information takes effect after the terminal device enters the RRC connected state, thereby improving the accuracy of the effectiveness of the SBFD configuration information and resolving a conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information during random access.

[0024] In one possible design, the first information includes a predefined first rule, which includes: determining that the SBFD configuration information is effective based on an RRC setup message, an RRC recovery message, or an RRC re-establishment message from the network device; or, determining that the SBFD configuration information is effective based on random access message 1; or, determining that the SBFD configuration information is effective based on random access message 3; or, determining that the SBFD configuration information is effective based on random access message A. Determining the effectiveness of the SBFD configuration information through predefined rules can reduce indication signaling overhead, and can determine that the SBFD configuration information is effective only when the terminal device can support SBFD, thereby avoiding conflicts and providing better flexibility.

[0025] In one possible design, first capability information is sent to the network device, where the first capability information is used to indicate that the terminal device supports SBFD. This allows the network device to determine whether the terminal device supports SBFD, so as to indicate or determine that the SBFD configuration information is effective at an appropriate time.

[0026] In one possible design, the random access preamble may be sent using physical random access channel resources on non-SBFD symbols.

[0027] In one possible design, the random access preamble may be sent using physical random access channel resources on SBFD symbols.

[0028] In one possible design, there may be a switching (transition) time between SBFD time slots (or symbols) and non-SBFD time slots (or symbols). This can accommodate scenarios where network devices or terminal devices have different hardware or software implementations of antennas, filters, etc. in the two time slots (or symbols), or consider uplink time synchronization.

[0029] In one possible design, the SBFD configuration information takes precedence over the cell-specific TDD uplink and downlink configuration information in downlink time slots (or symbols) or flexible time slots (or symbols). This can improve the coverage of the SBFD subband and thus improve the uplink coverage.

[0030] In one possible design, for the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information keeps the time slot (or symbol) as downlink or uplink.

[0031] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset the time slot (or symbol) to a downlink or uplink time slot (or symbol), or it can remain a flexible time slot (or symbol).

[0032] In one possible design, for a time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset the time slot (or symbol) to a downlink or uplink or flexible time slot (or symbol) that is not configured with an SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband. This can ensure the coverage of the SBFD subband and improve the uplink coverage.

[0033] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset the time slot (or symbol) to a downlink or uplink or flexible time slot (or symbol) that is not configured with an SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband. This can ensure the coverage of the SBFD subband and improve the uplink coverage.

[0034] In one possible design, for a time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset the time slot (or symbol) to a downlink or uplink time slot (or symbol) without a configured SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband.

[0035] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset the time slot (or symbol) to a downlink or uplink or flexible time slot (or symbol) without a configured SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband.

[0036] In one possible design, for a time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can configure an SBFD subband for the time slot (or symbol), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures the time slot (or symbol) as an SBFD time slot (or symbol).

[0037] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can configure an SBFD subband for the time slot (or symbol), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures the time slot (or symbol) as an SBFD time slot (or symbol).

[0038] In a second aspect, the present application provides a communication method that can be applied to a network device, or a processor, chip, chip system, or a functional module in the network device. The method may include: sending SBFD configuration information to a terminal device, where the SBFD configuration information is used to configure time domain resources and / or frequency domain resources of an SBFD subband; and sending first information to the terminal device, where the first information is used to indicate that the SBFD configuration information is effective.

[0039] Through the above method, after the network device configures the time domain resources and / or frequency domain resources of the SBFD subband for the terminal device, it indicates to the terminal device through the first information that the SBFD configuration information is effective. The effectiveness of the time domain resources and / or frequency domain resources of the SBFD subband can be flexibly controlled in various scenarios, thereby improving the flexibility of the SBFD configuration information.

[0040] In one possible design, the SBFD configuration information may be sent to the terminal device by the following method: sending an SIB to the terminal device, wherein the SIB includes the SBFD configuration information. Transmitting the SBFD configuration information via the SIB may reduce signaling overhead.

[0041] In one possible design, the SBFD configuration information includes frequency domain resources for at least one group of SBFD subbands, where each group of frequency domain resources in the at least one group of SBFD subbands corresponds to a subcarrier spacing (SCS). A first group of SBFD subbands includes multiple subbands, and the first group of SBFD subbands is any one of the at least one group of SBFD subbands. This allows configuration of frequency domain resources for SBFD subbands that match various SCSs, thereby improving the compatibility and flexibility of SBFD.

[0042] In one possible design, frequency domain resources of any subband included in the first group of SBFD subbands are included in a first carrier, the first carrier corresponds to the first group of SBFD subbands, and the SCS corresponding to the frequency domain resources of the first group of SBFD subbands is the same as the SCS corresponding to the first carrier. This ensures resource alignment between the SBFD subbands and the edges of the corresponding carriers.

[0043] In one possible design, the SBFD configuration information includes first indication information, where the first indication information is used to indicate a time slot position of the SBFD subband within a first time domain pattern, where the first time domain pattern corresponds to a first cycle length. Based on this, the time slot position of the SBFD subband within the first time domain pattern can be determined, thereby determining the time domain resources of the SBFD subband.

[0044] In one possible design, the first indication information is used to indicate the time slot position of the SBFD subband within the first time domain pattern, including: the first indication information is used to indicate the starting time slot and the first number of continuous time slots of the SBFD subband within the first time domain pattern; or, the first indication information is used to indicate the ending time slot and the second number of continuous time slots of the SBFD subband within the first time domain pattern; or, the first indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband within the first time domain pattern. Based on this method, the first indication information can indicate the time slot position of the SBFD subband within the first time domain pattern in a variety of ways, thereby improving indication flexibility.

[0045] In one possible design, the SBFD configuration information further includes second indication information, where the second indication information is used to indicate a symbol position of the SBFD subband within a time slot within the first time domain pattern. This can further determine the symbol position of the SBFD subband within the time slot within the first time domain pattern, thereby improving the accuracy of determining the time domain resources of the SBFD subband.

[0046] In one possible design, the second indication information is used to indicate the symbol position of the SBFD subband in the time slot within the first time domain pattern, including: the second indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the first time domain pattern, or the last M consecutive symbols in the starting time slot within the first time domain pattern, where M is a positive integer; and / or, the second indication information is used to indicate the ending symbol of the SBFD subband in the ending time slot within the first time domain pattern, or the consecutive N symbols starting from the starting symbol in the ending time slot within the first time domain pattern, where N is a positive integer. Based on this method, the second indication information can indicate the symbol position of the SBFD subband in the time slot within the first time domain pattern in a variety of ways, thereby improving the indication flexibility.

[0047] In one possible design, the SBFD configuration information further includes third indication information, where the third indication information is used to indicate a time slot position of the SBFD subband within a second time domain pattern, where the second time domain pattern corresponds to a second cycle length. Based on this, the time slot position of the SBFD subband within the second time domain pattern can be determined, thereby determining the time domain resources of the SBFD subband.

[0048] In one possible design, the third indication information is used to indicate the time slot position of the SBFD subband within the second time domain pattern, including: the third indication information is used to indicate the starting time slot and the third number of continuous time slots of the SBFD subband within the second time domain pattern; or, the third indication information is used to indicate the ending time slot and the fourth number of continuous time slots of the SBFD subband within the second time domain pattern; or, the third indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband within the second time domain pattern. Based on this method, the third indication information can indicate the time slot position of the SBFD subband within the second time domain pattern in a variety of ways, thereby improving indication flexibility.

[0049] In one possible design, the SBFD configuration information further includes fourth indication information, where the fourth indication information is used to indicate a symbol position of the SBFD subband within a time slot within the second time domain pattern. This can further determine the symbol position of the SBFD subband within the time slot within the second time domain pattern, thereby improving the accuracy of determining the time domain resources of the SBFD subband.

[0050] In one possible design, the fourth indication information is used to indicate the symbol position of the SBFD subband in the time slot within the second time domain pattern, including: the fourth indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the second time domain pattern, or the last P consecutive symbols in the starting time slot within the second time domain pattern, where P is a positive integer; and / or, the fourth indication information is used to indicate the ending symbol of the SBFD subband in the ending time slot within the second time domain pattern, or the consecutive K symbols starting from the starting symbol in the ending time slot within the second time domain pattern, where K is a positive integer. Based on this method, the fourth indication information can indicate the symbol position of the SBFD subband in the time slot within the second time domain pattern in a variety of ways, thereby improving the indication flexibility.

[0051] In one possible design, the time domain resources of the SBFD subband correspond to the reference SCS associated with the cell-specific uplink and downlink TDD configuration, so that the time domain resources of the SBFD subband and the time domain resources of TDD are compatible with each other.

[0052] In one possible design, the reference SCS is used to determine the time domain boundary of the SBFD subband.

[0053] In one possible design, the first information can be sent to the terminal device in the following manner: a first RRC message is sent to the terminal device, wherein the first RRC message includes the first information. Based on this method, the network device can clearly indicate that the SBFD configuration information takes effect after the terminal device enters the RRC connection state, which can improve the accuracy of the effectiveness of the SBFD configuration information and reduce the conflict between the effectiveness of the SBFD configuration information and the inability of the terminal device to use the SBFD configuration information during the random access process.

[0054] In one possible design, first capability information is received from the terminal device, where the first capability information is used to indicate that the terminal device supports SBFD. This allows the network device to determine whether the terminal device supports SBFD, so as to indicate that the SBFD configuration information takes effect at an appropriate time.

[0055] In one possible design, the random access preamble may be sent using physical random access channel resources on non-SBFD symbols.

[0056] In one possible design, the random access preamble may be sent using physical random access channel resources on SBFD symbols.

[0057] In one possible design, there may be a switching (transition) time between SBFD time slots (or symbols) and non-SBFD time slots (or symbols). This can accommodate scenarios where network devices or terminal devices have different hardware or software implementations of antennas, filters, etc. in the two time slots (or symbols), or consider uplink time synchronization.

[0058] In one possible design, the SBFD configuration information takes precedence over the cell-specific TDD uplink and downlink configuration information in downlink time slots (or symbols) or flexible time slots (or symbols). This can improve the coverage of the SBFD subband and thus improve the uplink coverage.

[0059] In one possible design, for the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information keeps the time slot (or symbol) as downlink or uplink.

[0060] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset the time slot (or symbol) to a downlink or uplink time slot (or symbol), or it can remain a flexible time slot (or symbol).

[0061] In one possible design, for a time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset the time slot (or symbol) to a downlink or uplink or flexible time slot (or symbol) that is not configured with an SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband. This can ensure the coverage of the SBFD subband and improve the uplink coverage.

[0062] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset the time slot (or symbol) to a downlink or uplink or flexible time slot (or symbol) that is not configured with an SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband. This can ensure the coverage of the SBFD subband and improve the uplink coverage.

[0063] In one possible design, for a time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset the time slot (or symbol) to a downlink or uplink time slot (or symbol) without a configured SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband.

[0064] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset the time slot (or symbol) to a downlink or uplink or flexible time slot (or symbol) without a configured SBFD subband, or in other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband.

[0065] In one possible design, for a time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can configure an SBFD subband for the time slot (or symbol), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures the time slot (or symbol) as an SBFD time slot (or symbol).

[0066] In one possible design, for a time slot (or symbol) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured with an SBFD subband by the SBFD configuration information, the terminal device-specific TDD uplink and downlink configuration information can configure an SBFD subband for the time slot (or symbol), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures the time slot (or symbol) as an SBFD time slot (or symbol).

[0067] In a third aspect, the present application further provides a communication device having the function of implementing the method of the first aspect or each possible design example of the first aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0068] In one possible design, the structure of the communication device may include a processing unit and, optionally, a transceiver unit. These units may perform the functions of the method in the above-mentioned first aspect or various possible design examples of the first aspect, which are not elaborated here.

[0069] In one possible design, the communication device includes one or more processors and, optionally, a memory and / or a transceiver. The transceiver is used to transmit and receive data, messages, or information, and to communicate and interact with other devices in the system. The processor is configured to support the communication device in performing the corresponding functions described in the first aspect or various possible design examples of the first aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device.

[0070] In a fourth aspect, the present application further provides a communication device having the function of implementing the method of the second aspect or each possible design example of the second aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0071] In one possible design, the structure of the communication device may include a processing unit and, optionally, a transceiver unit. These units may perform the functions of the method in the above-mentioned second aspect or various possible design examples of the second aspect, which are not elaborated here.

[0072] In one possible design, the communication device includes one or more processors and, optionally, a memory and / or a transceiver. The transceiver is used to transmit and receive data, messages, or information, and to communicate and interact with other devices in the system. The processor is configured to support the communication device in performing the corresponding functions described in the second aspect or various possible design examples of the second aspect. The memory is coupled to the processor and stores program instructions and data necessary for the communication device.

[0073] In a fifth aspect, embodiments of the present application provide a communication system that may include a terminal device and / or a network device. The terminal device is configured to implement the method of the first aspect or each possible design example of the first aspect. The network device is configured to implement the method of the second aspect or each possible design example of the second aspect.

[0074] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores program instructions. When the program instructions are run on a computer, the computer executes the method described in the first aspect of the embodiment of the present application and any possible design thereof, or the second aspect and any possible design thereof. Exemplarily, the computer-readable storage medium can be any available medium that can be accessed by a computer. Taking this as an example but not limited to: the computer-readable medium may include a non-transitory computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer.

[0075] In the seventh aspect, an embodiment of the present application provides a computer program product, comprising instructions, which, when executed on a computer, causes the method described in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect to be executed.

[0076] In the eighth aspect, the present application also provides a chip or chip system, comprising one or more processors, which are coupled to at least one memory and are used to read and execute program instructions stored in the memory so that the chip or chip system implements the method described in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect.

[0077] For each of the above-mentioned aspects from the third to the eighth aspect and the technical effects that may be achieved by each of the aspects, please refer to the above-mentioned description of the technical effects that can be achieved by the first aspect or the various possible solutions in the first aspect, or the above-mentioned second aspect or the various possible solutions in the second aspect, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] FIG1 is a schematic diagram of the architecture of a communication system provided by the present application;

[0079] FIG2 is a schematic diagram of the connection relationship between the network device and the terminal device provided by the present application;

[0080] FIG3 is a schematic diagram of DL and UL in a TDD system provided by the present application;

[0081] FIG4 is a schematic diagram of an SBFD solution provided in this application;

[0082] FIG5 is a schematic diagram of another SBFD solution provided by the present application;

[0083] FIG6 is a flowchart of a random access process provided by the present application;

[0084] FIG7 is a flowchart of another random access process provided by the present application;

[0085] FIG8 is a flow chart of a communication method provided by the present application;

[0086] FIG9 is a schematic diagram of two groups of SBFD sub-band frequency domain resources corresponding to one SCS respectively, provided by the present application;

[0087] FIG10 is a schematic diagram of a first time domain pattern provided by the present application;

[0088] FIG11 is a schematic diagram of a first time domain pattern and a second time domain pattern provided by the present application;

[0089] FIG12 is a schematic structural diagram of a communication device provided by the present application;

[0090] FIG13 is a structural diagram of a communication device provided in this application. DETAILED DESCRIPTION

[0091] The present invention provides a communication method and apparatus for configuring time-domain resources and / or frequency-domain resources for SBFD subbands, thereby increasing the flexibility of SBFD configuration information. The method and apparatus described herein are based on the same technical concept. Since the method and apparatus solve similar problems, their implementations can refer to each other, and any repetitions will not be repeated.

[0092] In the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing the description and cannot be understood as indicating or implying relative importance or order.

[0093] In the description of this application, "at least one" means one or more, and "more" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c can be single or plural.

[0094] In the description of this application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural. " / " means "or", for example, a / b means a or b.

[0095] In order to more clearly describe the technical solutions of the embodiments of the present application, the communication method and device provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0096] The technical solutions in the embodiments of the present application can be applied to various communication systems, such as universal mobile telecommunications system (UMTS), wireless local area network (WLAN), wireless fidelity (Wi-Fi) system, fourth generation (4G) mobile communication system (such as long term evolution (LTE) system), fifth generation (5G) mobile communication system (such as new radio (NR) system), and future evolved communication systems (such as sixth generation (6G) mobile communication system).

[0097] For example, FIG1 illustrates a schematic diagram of the architecture of a possible communication system applicable to embodiments of the present application. As shown in FIG1 , the communication system 10 may include a radio access network (RAN) 100 and a core network (CN) 200. Optionally, the communication system 10 may also include the Internet 300.

[0098] The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1 , collectively referred to as 110) and at least one terminal device (e.g., 120a-120j in FIG. 1 , collectively referred to as 120). The RAN 100 may also include other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1 ). The terminal device 120 is wirelessly connected to the RAN node 110. The RAN node 110 is wirelessly or wiredly connected to the core network 200. The core network devices in the core network 200 and the RAN node 110 in the RAN 100 may be separate physical devices, or they may be a single physical device that integrates core network logical functions and radio access network logical functions.

[0099] The RAN 100 may be a cellular system related to the Third Generation Partnership Project (3GPP), such as a 4G or 5G mobile communication system, or a future-oriented evolutionary system (such as a 6G mobile communication system). The RAN 100 may also be an open access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a WiFi system. The RAN 100 may also be a communication system that integrates two or more of the above systems.

[0100] The RAN node 110, sometimes also referred to as a RAN entity or access node, constitutes part of the communication system and facilitates wireless access for terminal devices. Multiple RAN nodes 110 in the communication system 10 can be of the same type or different types. In some scenarios, the roles of the RAN node 110 and the terminal device 120 are relative. For example, the network element 120i in Figure 1 can be a helicopter or drone, which can be configured as a mobile base station. For terminal 120j accessing the RAN 100 via network element 120i, network element 120i is a base station; however, for base station 110a, network element 120i is a terminal device. The RAN node 110 and the terminal device 120 are sometimes referred to as communication devices. For example, network elements 110a and 110b in Figure 1 can be understood as communication devices with base station functionality, and network elements 120a-120j can be understood as communication devices with terminal device functionality.

[0101] The RAN node may also be expressed in different ways, such as a network device. In this application, unless otherwise specified, the network device is used to express the node.

[0102] In one possible scenario, the network device may also be referred to as an access network device, and the access network device may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The access network device may be a macro base station (such as 110a in Figure 1), a micro base station or an indoor station (such as 110b in Figure 1), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the access network device may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). All or part of the functions of the access network device in this application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The access network device in this application may also be a logical node, a logical module or software that can implement all or part of the functions of the access network device.

[0103] In another possible scenario, multiple access network devices collaborate to assist terminal devices in achieving wireless access, and different access network devices respectively implement part of the functions of the base station. For example, the access network device can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or they can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0104] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called open CU (open CU, O-CU), DU may also be called open DU (open DU, O-DU), CU-CP may also be called open CU-CP (open CU-CP, O-CU-CP), CU-UP may also be called open CU-UP (open CU-UP, O-CU-UP), and RU may also be called open RU (open RU, O-RU). Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0105] Terminal devices may also be referred to as user equipment (UE), mobile stations, mobile terminals, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, smart city, etc. For example, a terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a robotic arm, a smart home device, etc. The embodiments of the present application do not limit the device form of the terminal device.

[0106] Exemplarily, the aforementioned network device and the terminal device may be connected via an air interface. For example, the connection relationship between the network device and the terminal device may be as shown in FIG2 .

[0107] The communication system described in the embodiment of the present application is intended to more clearly illustrate the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0108] The following first explains the relevant terms or technologies involved in the embodiments of this application. It should be noted that these explanations are intended to make the embodiments of this application easier to understand and should not be regarded as limiting the scope of protection claimed by this application.

[0109] 1) Subband full duplex (SBFD)

[0110] As shown in Figure 3, in a time division duplexing (TDD) system, the downlink (DL) typically occupies the majority of time resources, resulting in an imbalance in coverage between the DL and uplink (UL). Compared to frequency division duplexing (FDD) systems, TDD systems have poor uplink coverage and greater latency. To address the uplink coverage and latency issues in TDD systems, Release 18 proposed the SBFD solution.

[0111] In the SBFD scheme, a carrier can be divided into multiple subbands, and the transmission directions of different subbands can be different. For example, an SBFD scheme can be shown in Figure 4: a carrier is divided into three subbands, the middle subband is the uplink subband (for uplink transmission), and the upper and lower subbands are downlink subbands (for downlink transmission). For another example, another SBFD scheme can be shown in Figure 5: a carrier is divided into two subbands, the upper subband is the downlink subband (for downlink transmission), and the lower subband is the uplink subband (for uplink transmission). It can be considered that in the SBFD scheme, on the SBFD symbol, the network device can simultaneously transmit on the downlink subband and receive on the uplink subband. Under the SBFD scheme, the uplink transmission resources available to the terminal device are increased, which can effectively improve the uplink coverage and reduce the uplink delay.

[0112] 2)SBFD symbols and non-SBFD symbols

[0113] SBFD symbols can be considered as symbols configured with SBFD, and non-SBFD symbols can be considered as symbols not configured with SBFD. For uplink transmission, non-SBFD symbols can be uplink symbols or flexible symbols. For downlink transmission, non-SBFD symbols can be downlink symbols or flexible symbols.

[0114] 3) System Information Block (SIB)

[0115] The system information transmission process mainly involves the terminal device receiving some necessary parameters related to cell residence and access from the network equipment, including various system information blocks, such as system information block 1 (SIB1) and system information block 2 (SIB2), as well as other SIBs. For terminal devices in the radio resource control (RRC) idle state or RRC inactive state, they also need to monitor paging messages sent by the network equipment.

[0116] Generally, for a terminal device in the initial access state, after detecting the synchronization signal block (SSB), it can receive SIB1 based on the SIB1 reception-related parameters obtained from the master information block (MIB). In NR, SIB1 is carried by the physical downlink shared channel (PDSCH) and scheduled by the physical downlink control channel (PDCCH). Specifically, the PDCCH carries downlink control information (DCI). DCI includes information such as the time domain resources, frequency domain resources, and modulation and coding scheme transmitted by the PDSCH.

[0117] After receiving SIB1, the terminal device can continue to receive other SIBs or paging messages as needed.

[0118] It should be noted that SIB1 and other SIBs are transmitted periodically. For SIB1, the system information it carries changes every 160ms, and can be transmitted repeatedly every 20ms within that 160ms. For SIBs other than SIB1, the transmission period is the one configured by SIB1.

[0119] 4) Random access (RA)

[0120] Generally, during the cell access process, the terminal device first detects the SSB sent by the network device to complete downlink time synchronization and frequency synchronization. It then receives system information from the network device, including SIB1 and other SIBs, to obtain the cell configuration information. This cell configuration information includes configuration information related to cell residency and RA. Subsequently, the terminal device completes uplink time synchronization with the network device through a random access process and establishes an RRC connection with the network device. Once the RRC connection is established between the terminal device and the network device, uplink and downlink service data can be transmitted.

[0121] In NR, there are two types of random access procedures: type-1 random access (type-1RA) and type-2 random access (type-2RA). Type-1RA is also known as 4-step random access (4-step RA), and type-2RA is also known as 2-step random access (2-step RA). Based on whether there is a conflict in the transmission of preambles between terminal devices, the random access procedure includes contention-based random access (CBRA) and contention-free random access (CFRA). The CBRA and CFRA processes are basically the same.

[0122] Taking CBRA as an example, the basic process of type-1 RA can be shown in Figure 6, which specifically includes the following four steps:

[0123] Step 601: The terminal device sends a preamble via a physical random access channel (PRACH), that is, the terminal device sends a random access message 1 (message 1, Msg1).

[0124] Among them, before the terminal device sends Msg1, the terminal device obtains the resource configuration of PRACH by reading the system message, mainly including time, frequency and preamble sequence.

[0125] Step 602: After sending Msg1, the terminal device starts a random access response window and listens for a random access response (RAR) sent by the network device within the window. RAR can also be understood as random access message 2 (Msg2).

[0126] Step 603: The terminal device sends a random access message 3 (message3, Msg3) to the network device.

[0127] Among them, if the terminal device successfully detects its own RAR in step 602, the random access is successful, and the terminal device continues to send Msg3 according to the instruction of RAR. The main function of Msg3 is to send an RRC connection establishment request.

[0128] If the terminal device does not receive its own RAR, the random access fails, and the terminal device re-initiates the random access process according to the backoff parameters indicated by the network device until the maximum number of random access times is reached.

[0129] Step 604: After sending Msg3, the terminal device monitors and receives random access message 4 (Msg4) sent by the network device. Msg4 carries a contention resolution flag and air interface parameter configuration for the terminal device.

[0130] If the terminal device successfully receives Msg4, the RA is considered successful; otherwise, the RA fails. If the RA is successful, the terminal device continues to send message 5 (Msg5), which is mainly used to send the RRC establishment completion command. If the RA fails, the terminal re-initiates the random access process according to the fallback parameters indicated by the network device until the maximum number of random access attempts is reached.

[0131] The type-2RA process can be understood as combining the four steps mentioned above into a two-step process based on the type-1RA process. For example, the basic process of the type-2RA process can be shown in Figure 7, which specifically includes the following two steps:

[0132] Step 701: The terminal device may send a random access message A (message A, MsgA) to the terminal device. MsgA includes a preamble and an identifier of the terminal device.

[0133] The MsgA may correspond to the aforementioned Msg1 and Msg3, and may also be understood as being a combined message of the aforementioned Msg1 and Msg3.

[0134] Step 702: The network device may send a random access message B (message B, MsgB) to the terminal device. MsgB includes a conflict resolution identifier and air interface parameter configuration for the terminal device.

[0135] The MsgB may correspond to the aforementioned Msg2 and Msg4, and may also be understood as being a merged message of the aforementioned Msg2 and Msg4.

[0136] The current standard discussion is that the time domain resources and frequency domain resources (time domain resources and frequency domain resources can also be collectively referred to as time-frequency resources) of the SBFD subband can be semi-statically configured by the network device through signaling, and the time domain resources and frequency domain resources of the SBFD subband can be cell-level, that is, the SBFD time-frequency resources of all terminal devices that support SBFD are the same. One possible method 1 is that during the initial access phase of the terminal device, the network device can broadcast the time-frequency resources of the SBFD subband through SIB1. Another possible method 2 is that after the terminal device enters the RRC connection state, the network device can configure the time-frequency resources of the SBFD subband for the terminal device through RRC signaling or other terminal device-specific signaling.

[0137] However, if the time-frequency resources of the SBFD subband are configured using the aforementioned method 2, since the time-frequency resources of the SBFD subband are common to the cell, notifying each terminal device of the common cell information through terminal device-specific signaling will result in high signaling overhead.

[0138] If the time-frequency resources of the SBFD subband are configured through the aforementioned method 1, the relevant configuration of the SBFD subband will be activated and take effect immediately, which will conflict with the content currently being discussed in the following standard. The current standard discussion: For terminal devices in the RRC idle state or inactive state, SBFD is not supported in principle, or in other words, terminal devices in the RRC idle state or inactive state still receive or send data in the original manner, such as receiving SIBs, paging messages, etc. If it is possible to consider that the terminal device supports SBFD in the RA process, however, whether to support SBFD in the RA process and how to support SBFD in the RA process, such as from which step in the RA process to support SBFD, are still under standard discussion and there is no clear method to achieve it.

[0139] Based on this, an embodiment of the present application provides a communication method for configuring the time domain resources and frequency domain resources of the SBFD subband, which can reduce signaling overhead and clearly determine whether the configured time domain resources and / or frequency domain resources of the SBFD subband are effective.

[0140] In the following embodiments, the communication method provided in the embodiments of the present application is described in detail using a network device and a terminal device as examples. It should be understood that the operations performed by the network device can also be implemented by a processor, a chip or a chip system, or a functional module in the network device, and the operations performed by the terminal device can also be implemented by a processor, a chip or a chip system, or a functional module in the terminal device, and this application does not limit this.

[0141] Based on the above description, an embodiment of the present application provides a communication method, as shown in FIG8 . The process of the method may include:

[0142] Step 801: The network device sends SBFD configuration information to the terminal device, where the SBFD configuration information is used to configure the time domain resources and / or frequency domain resources of the SBFD subband. Correspondingly, the terminal device receives the SBFD configuration information from the network device.

[0143] In this application, "sending" can also be described as "outputting." The network device sending SBFD configuration information to a terminal device can be replaced by "the network device outputting the SBFD configuration information." For example, "the network device outputting SBFD configuration information" can be understood as the network device's baseband unit outputting the SBFD configuration information to the radio frequency unit in the network device. Another example of "the network device outputting SBFD configuration information" can be understood as the radio frequency unit in the network device outputting the SBFD configuration information to the terminal device via the air interface.

[0144] The time domain resources and frequency domain resources of an SBFD subband may also be referred to as the time-frequency resources of the SBFD subband. In some embodiments, the time domain resources of an SBFD subband may also be described as the time domain position of the SBFD subband, the frequency domain resources of an SBFD subband may also be described as the frequency domain position of the SBFD subband, and the time-frequency resources of an SBFD subband may also be described as the time-frequency position of the SBFD subband. This application does not limit this.

[0145] In an optional implementation, the network device may configure the SBFD configuration information for the terminal device via a SIB, that is, the network device may send a SIB including the SBFD configuration information to the terminal device. For example, the SIB may be SIB1.

[0146] For SBFD, a carrier may include at least one downlink subband and at least one uplink subband. This application does not specify whether a guard band exists between the downlink and uplink subbands, and if so, whether transmission can be performed on the guard band. Furthermore, this application does not specify whether downlink and uplink subbands can overlap. That is, in some examples, an SBFD subband may include an uplink subband and a downlink subband. In other examples, an SBFD subband may include an uplink subband, a guard band, and a downlink subband.

[0147] In one possible approach, the frequency domain resources of an SBFD subband may be configured based on a subcarrier spacing (SCS). For example, the SBFD configuration information may include at least one set of frequency domain resources of an SBFD subband, where each set of frequency domain resources of the at least one set of SBFD subbands corresponds to (or is associated with) an SCS.

[0148] Optionally, the SCSs corresponding to the frequency domain resources of at least one group of SBFD subbands are different.

[0149] Optionally, the SCSs corresponding to the frequency domain resources of at least one group of SBFD subbands may be the same, or the SCSs corresponding to the frequency domain resources of some groups of SBFD subbands in at least one group of SBFD subbands may be the same, and the SCSs corresponding to the frequency domain resources of the remaining groups of SBFD subbands may be different. This application does not limit this.

[0150] It should be understood that when the frequency domain resources of at least one group of SBFD sub-bands correspond to different SCSs, the number of SBFD sub-band groups is the same as the number of SCSs.

[0151] For example, as shown in Figure 9, taking two groups of SBFD sub-bands as an example, the SCS corresponding to the frequency domain resources of one group of SBFD sub-bands can be 15 kHz (as shown in (a) in Figure 9), and the SCS corresponding to the frequency domain resources of the other group of SBFD sub-bands can be 30 kHz (as shown in (b) in Figure 9).

[0152] Exemplarily, the first group of SBFD subbands may include multiple subbands, where the first group of SBFD subbands is any one group of SBFD subbands in at least one group of SBFD subbands. The multiple subbands may be understood as two or more subbands, and the multiple subbands include at least one downlink subband and one uplink subband.

[0153] In some implementations, carriers are configured based on SCSs. For example, each carrier in at least one carrier corresponds to an SCS. Based on this, a carrier also corresponds to a set of SBFD subband frequency domain resources, and the corresponding carriers and a set of SBFD subband frequency domain resources have the same SCS. In other words, there is a one-to-one correspondence between the SBFD subband frequency domain resources, SCSs, and carriers. A carrier can be understood as a frequency range or a frequency segment, for example.

[0154] Accordingly, the frequency domain resources of any subband included in the first group of SBFD subbands can be included in the first carrier. The first carrier corresponds to the first group of SBFD subbands. The SCS corresponding to the frequency domain resources of the first group of SBFD subbands is the same as the SCS corresponding to the first carrier. The first carrier is one of the at least one carrier. This ensures that the SBFD subbands are aligned with the edges of the carriers.

[0155] For example, the first carrier is a 100 MHz carrier, the SCS corresponding to the first carrier is 15 kHz, the SCS corresponding to the frequency domain resources of the first group of SBFD subbands is 15 kHz, and the frequency domain resources of any subband included in the first group of SBFD subbands are all within the 100 MHz carrier.

[0156] In an optional implementation, when the network device indicates the frequency domain resources of any group of SBFD subbands through configuration information, it may indicate only the frequency domain resources of the uplink subbands in the group of subbands, and by default, all unindicated frequency domain resources are downlink subband frequency domain resources. Alternatively, it may indicate only the frequency domain resources of the downlink subbands in the group of subbands, and by default, all unindicated frequency domain resources are uplink subband frequency domain resources. This application is not limited to this.

[0157] It should be understood that at least one group of SBFD subbands can also be described as at least one set of SBFD subbands, or other descriptions can be used; at least one carrier can also be understood as at least one set of carriers, or other descriptions can be used, which is not limited in this application.

[0158] In some embodiments, the carrier may also be divided into an uplink carrier and a downlink carrier. Accordingly, the downlink carrier of the same SCS corresponds to the downlink subband, and the uplink carrier of the same SCS corresponds to the uplink subband.

[0159] Optionally, the terminal device may determine effective resources based on the activated bandwidth part (BWP) and the frequency domain resources of the second group of SBFD subbands; the SCS corresponding to the frequency domain resources of the second group of SBFD subbands is the same as the SCS of the activated BWP, and the second group of SBFD subbands is a group of SBFD subbands in the at least one group of SBFD subbands. Optionally, the second group of SBFD subbands may be the first group of SBFD subbands described above, or any other group of SBFD subbands in the at least one group of SBFD subbands other than the first group of SBFD subbands, and this application does not limit this.

[0160] The terminal device may determine that frequency domain resources overlapping with the activated BWP and the frequency domain resources of the second group of SBFD subbands are valid resources.

[0161] Accordingly, the network device may also determine the effective resources based on the frequency domain resources of the activated BWP and the second group of SBFD sub-bands. The determination method of the network device may refer to the determination method of the terminal device, which will not be repeated here.

[0162] It can be understood that effective resources can also be described as available resources, effective frequency domain resources, available frequency domain resources, etc.

[0163] In one possible approach, the time domain resources of an SBFD subband are periodic, which can also be understood as a periodically recurring time domain pattern of the SBFD subband. Network devices can configure the time domain pattern of the SBFD subband using indication information. It should be understood that the SBFD subbands described here refer to all SBFD subbands and are a collective term for all SBFD subbands. This can be understood as including at least one group of the SBFD subbands described above.

[0164] For example, the SBFD configuration information may include first indication information, where the first indication information may be used to indicate a time slot position of the SBFD subband within a first time domain pattern, and the first time domain pattern may correspond to a first cycle length.

[0165] The first indication information may indicate the time slot position of the SBFD subband in the first time domain pattern in any of the following ways:

[0166] Mode a1: The first indication information is used to indicate the starting time slot and the number of first continuous time slots of the SBFD subband in the first time domain pattern.

[0167] Using method a1, the terminal device can determine the time slot position of the SBFD subband within the first time domain pattern based on the starting time slot and the first number of consecutive time slots. For example, if the starting time slot is time slot 1 and the first number of consecutive time slots is 3, the terminal device can determine that the time slot positions of the SBFD subband within the first time domain pattern include time slots 1 through 3.

[0168] Mode a2: The first indication information is used to indicate the number of end time slots and second continuous time slots of the SBFD subband in the first time domain pattern.

[0169] Using method a2, the terminal device can determine the time slot position of the SBFD subband within the first time domain pattern based on the ending slot and the number of the second continuous time slots. For example, if the ending slot is time slot 4 and the number of the second continuous time slots is 2, the terminal device can determine that the time slot position of the SBFD subband within the first time domain pattern includes time slots 3 and 4.

[0170] Mode a3: The first indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband in the first time domain pattern.

[0171] Using method a3, the terminal device can determine the time slot position of the SBFD subband within the first time domain pattern based on the starting time slot and the ending time slot. For example, if the starting time slot is time slot 1 and the ending time slot is time slot 3, the terminal device can determine that the time slot positions of the SBFD subband within the first time domain pattern include time slots 1 to 3.

[0172] Accordingly, the network device may determine the time slot position of the SBFD subband within the first time domain pattern using the same method as the terminal device, which will not be described in detail here.

[0173] Optionally, the SBFD configuration information may further include second indication information, where the second indication information may be used to indicate a symbol position of the SBFD subband within a time slot within the first time domain pattern.

[0174] The second indication information may indicate the symbol position of the SBFD subband in the time slot in the first time domain pattern in any of the following manners b1-b2 and any of the following manners b3-b4:

[0175] Mode b1: The second indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot in the first time domain pattern.

[0176] Mode b2: The second indication information is used to indicate the last M consecutive symbols in the starting time slot of the SBFD subband in the first time domain pattern, where M is a positive integer.

[0177] In method b2, the terminal device can determine the starting symbol of the SBFD subband in the starting time slot of the first time domain pattern based on the last M consecutive symbols in the starting time slot of the first time domain pattern. For example, if the starting time slot includes 12 symbols and M is 5, the terminal device can determine that the starting symbol of the SBFD subband in the starting time slot of the first time domain pattern is the 8th symbol in the starting time slot (i.e., symbol 8 in the starting time slot).

[0178] Mode b3: The second indication information is used to indicate the end symbol of the SBFD subband in the end slot within the first time domain pattern.

[0179] Mode b4: The second indication information is used to indicate N consecutive symbols starting from the end slot of the SBFD subband in the first time domain pattern, where N is a positive integer.

[0180] Using method b4, the terminal device can determine the end symbol of the SBFD subband in the end slot of the first time domain pattern by using N consecutive symbols starting in the end slot of the first time domain pattern. For example, if the end slot includes 12 symbols and M is 6, the terminal device can determine that the end symbol of the SBFD subband in the end slot of the first time domain pattern is the 6th symbol in the end slot (i.e., symbol 6 in the end slot).

[0181] Through the aforementioned method b1 or method b2, the terminal device can determine the position of the starting symbol of the SBFD subband in the starting time slot within the first time domain pattern. Through the aforementioned method b3 or method b4, the terminal device can determine the position of the ending symbol of the SBFD subband in the ending time slot within the first time domain pattern. Thus, the terminal device can determine the symbol position of the SBFD subband in the time slot within the first time domain pattern, that is, the symbol position within the time slot within the first time domain pattern can include the starting symbol in the starting time slot to the ending symbol in the ending slot.

[0182] For example, when the symbol position of the SBFD subband in the time slot within the first time domain pattern is determined by the above-mentioned method b2 and method b4, the above-mentioned example is still used to obtain that the symbol position of the SBFD subband in the time slot within the first time domain pattern includes symbol 8 in the starting time slot of the first time domain pattern to symbol 6 in the ending time slot.

[0183] Optionally, when the configuration information includes first indication information and second indication information, the first indication information can be understood as a first-level indication, and the second indication information can be understood as a second-level indication. That is, based on the first indication information indicating the time slot position of the SBFD subband within the first time domain pattern, the second indication information can further indicate the symbol position of the SBFD subband within the time slot within the first time domain pattern.

[0184] In an example, the first cycle length may be the same as the cycle length of the current TDD uplink and downlink configuration.

[0185] Based on the above method, an example of a first time-domain pattern may be shown in FIG10 .

[0186] In some embodiments, the time domain resources of the SBFD subband can be configured with a dual period. This can also be understood as the network device being able to configure two time domain patterns. For example, in addition to configuring the first time domain pattern described above, the network device can also configure a second time domain pattern through indication information. The second time domain pattern corresponds to a second period length.

[0187] For example, the SBFD configuration information may further include third indication information, where the third indication information is used to indicate a time slot position of the SBFD subband in the second time domain pattern.

[0188] The third indication information may indicate the time slot position of the SBFD subband in the second time domain pattern in any of the following ways:

[0189] Mode c1: The third indication information is used to indicate the starting time slot and the number of third continuous time slots of the SBFD subband in the second time domain pattern.

[0190] Mode c2: The third indication information is used to indicate the number of the end time slot and the fourth continuous time slot of the SBFD subband in the second time domain pattern.

[0191] Mode c3: The third indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband in the second time domain pattern.

[0192] The principle by which a terminal device determines the time slot position of an SBFD subband within the second time domain pattern using methods c1-c3 is similar to the principle by which a terminal device determines the time slot position of an SBFD subband within the first time domain pattern using methods a1-a3. These principles can be referenced and are not described in detail here. The same applies to network devices.

[0193] Optionally, the SBFD configuration information may further include fourth indication information, where the fourth indication information is used to indicate a symbol position of the SBFD subband in a time slot in the second time domain pattern.

[0194] The fourth indication information may indicate the symbol position of the SBFD subband in the time slot in the second time domain pattern in any of the following manners d1-d2 and any of the following manners d3-d4:

[0195] Mode d1: The fourth indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot in the second time domain pattern.

[0196] Mode d2: The fourth indication information is used to indicate the last P consecutive symbols in the starting time slot of the SBFD subband in the second time domain pattern, where P is a positive integer.

[0197] Mode d3: The fourth indication information is used to indicate the end symbol of the SBFD subband in the end slot in the second time domain pattern.

[0198] Mode d4: The fourth indication information is used to indicate K consecutive symbols starting from the end slot of the SBFD subband in the second time domain pattern, where K is a positive integer.

[0199] Similarly, the principle by which a terminal device determines the symbol position of an SBFD subband within the second period using methods d1-d4 is similar to the principle by which a terminal device determines the symbol position of an SBFD subband within the first time domain pattern using methods b1-b4. These principles can be referenced and are not described in detail here. The same applies to network devices.

[0200] Exemplarily, FIG11 shows a schematic diagram of a first time domain pattern and a second time domain pattern in a dual-cycle configuration scenario.

[0201] In some embodiments, the first cycle length and the second cycle length may be configured by the network device. Optionally, the first cycle length and the second cycle length may be the same or different. For example, the first cycle length is P1 milliseconds (ms) and the second cycle length is P2 ms, where P1 and P2 are positive numbers, and the relationship between P1 and P2 is not limited in this application.

[0202] Exemplarily, in a dual-cycle configuration scenario, the first cycle length and the second cycle length may be respectively the same as the two cycle lengths of the TDD uplink and downlink configurations.

[0203] In an optional implementation, the first cycle length and the second cycle length may form a third cycle length, that is, the third cycle length is (P1+P2) ms. In this case, it can be understood that the third time domain pattern includes the first time domain pattern and the second time domain pattern, and the third time domain pattern corresponds to the third cycle length. It can also be understood that the network device periodically indicates two time domain patterns.

[0204] Optionally, P1+P2 can be divided by 20ms. This ensures that an integer number of SBFD time domain cycles are included within 20ms, which helps reduce the implementation complexity of terminal devices and network equipment and facilitates alignment with the time domain resources configured for TDD uplink.

[0205] In some embodiments, the time domain resources of the SBFD subband may correspond to the reference SCS associated with the cell-specific uplink and downlink TDD configuration.

[0206] For example, the cell-specific uplink and downlink TDD configuration may be a dedicated uplink and downlink TDD configuration of the working cell or the serving cell of the terminal device.

[0207] Optionally, the SCS corresponding to the time domain resources of the SBFD subband may also be less than or equal to the reference SCS associated with the cell-specific uplink and downlink TDD configuration.

[0208] In one example, the reference SCS can be used to determine the time domain boundaries of the SBFD subband. Specifically, the terminal device can use the reference SCS to determine the boundaries of time units such as symbols or time slots, and can then determine the boundaries of the SBFD subband's time domain resources based on the time slot position and / or symbol position of the SBFD subband.

[0209] It should be understood that the frequency domain resources of the SBFD subband and the time domain resources of the SBFD subband are associated. It can be understood that the frequency domain resources of the SBFD subband appear or take effect on the time domain resources of the SBFD subband.

[0210] It should be noted that the relevant content of the SBFD configuration information described above can also be implemented independently without relying on the solutions of the embodiments of the present application. It can also be understood that the SBFD configuration information in any scenario can adopt the description of the above content.

[0211] Step 802: The terminal device determines that the SBFD configuration information is effective according to the first information, where the first information is used to indicate that the SBFD configuration information is effective.

[0212] Optionally, the first information may also be used to indicate that the SBFD configuration information is invalid. Accordingly, the terminal device may determine that the SBFD configuration information is invalid according to the first information.

[0213] In this application, effectiveness can also be described as activation, etc.

[0214] In some embodiments, the first information may be received by the terminal device from the network device, that is, the network device sends the first information to the terminal device.

[0215] For example, the network device sends a first RRC message to the terminal device, and accordingly, the terminal device receives the first RRC message from the network device, where the first RRC message includes the first information.

[0216] The network device sending the first RRC message to the terminal device can be replaced by the description that the network device outputs the first RRC message. For example, the network device outputting the first RRC message can be understood as the baseband unit of the network device outputting the first RRC message to the radio frequency unit in the network device. For another example, the network device outputting the first RRC message can be understood as the radio frequency unit in the network device outputting the first RRC message to the terminal device via the air interface.

[0217] For another example, the first information may also be carried in other signaling of the network device, such as a medium access control control element (MAC CE), downlink control information (DCI), random access message 2, random access message 4, random access message B, etc.

[0218] In some other embodiments, the first information may be predefined, that is, the terminal device may obtain the predefined first information. For example, the first information may include a predefined first rule, and the first rule may include at least one of the following rules:

[0219] Rule 1: The SBFD configuration information is determined to be effective according to an RRC setup message, an RRC resume message, or an RRC reestablishment message from a network device.

[0220] For example, after the terminal device receives an RRC setup message, an RRC recovery message, or an RRC re-establishment message from the network device, the SBFD configuration information becomes effective. In one possible embodiment, the RRC setup message, the RRC recovery message, or the RRC re-establishment message is carried in random access message 4 or random access message B. Therefore, it can also be understood that after the terminal device receives random access message 4 or random access message B from the network device, the SBFD configuration information becomes effective.

[0221] Rule 2: Determine whether the SBFD configuration information is effective according to random access message 1.

[0222] For example, the SBFD configuration information becomes effective after the terminal device sends the random access message 1. For another example, the SBFD configuration information becomes effective when the terminal device sends the random access message 1.

[0223] Among them, the terminal device sending the random access message 1 can also be understood as the terminal device sending a random access preamble code.

[0224] Optionally, in Rule 2, the terminal device may send first capability information to the network device through the random access message 1 during the random access process, where the first capability information is used to indicate that the terminal device supports SBFD.

[0225] Rule 3: Determine whether the SBFD configuration information is effective according to random access message 3.

[0226] For example, after the terminal device sends the random access message 3, the SBFD configuration information takes effect.

[0227] Optionally, in rule 3, the terminal device may send the first capability information to the network device via the random access message 3 during the random access process.

[0228] Rule 4: The SBFD configuration information is determined to be effective according to the random access message A.

[0229] For example, the SBFD configuration information becomes effective after the terminal device sends the random access message A. For another example, the SBFD configuration information becomes effective when the terminal device sends the random access message A.

[0230] Among them, the terminal device sending a random access message A may include the terminal device sending a random access preamble code.

[0231] Optionally, in Rule 4, the terminal device may send the first capability information to the network device via the random access message A during the random access process.

[0232] By way of example, the first information and the specific situation in which the terminal device determines that the SBFD configuration information is effective based on the first information are described in detail below through different scenarios:

[0233] In scenario e1, the protocol does not support SBFD during the random access process for terminal devices in RRC Idle or RRC Inactive states; or, the protocol supports SBFD during the random access process for terminal devices in RRC Idle or RRC Inactive states, but the network device does not enable this feature. In scenario e1, the network device's failure to enable this feature can be understood as the network device not configuring or activating SBFD for the terminal device during the random access process.

[0234] In this scenario e1, if the terminal device sends first capability information to the network device during the random access process, and the first capability information is used to indicate support for SBFD, then the first information can be predefined, such as the following method f1, or the first information can also be sent by the network device to the terminal device, such as the following methods f2-f3.

[0235] Optionally, in the scenario e1, when the terminal device sends the first capability information to the network device during the random access process, the first capability information may be sent to the network device via random access message 1, random access message 3 or random access message A during the random access process.

[0236] Mode f1: The first information may include a predefined first rule, and the first rule may include the aforementioned Rule 1.

[0237] For example, in the mode f1, after the terminal device receives the RRC establishment message, RRC recovery message, or RRC re-establishment message from the network device, the SBFD configuration information becomes effective.

[0238] Among them, usually the RRC setup message or the RRC resume message or the RRC reestablishment message is carried by the random access message 4 or the random access message B. Therefore, in this method f1, rule 1 can also be understood as determining that the SBFD configuration information is effective based on the random access message 4 or the random access message B from the network device. For example, the SBFD configuration information is effective after the terminal device receives the random access message 4 or the random access message B from the network device.

[0239] Through this method f1, the effectiveness of the SBFD configuration information is determined by predefined rules, which can reduce the indication signaling overhead, and when the SBFD configuration information takes effect, the terminal device has completed the random access process, thereby resolving the conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information during the random access process.

[0240] Mode f2: The network device sends the aforementioned random access message 4 or random access message B to the terminal device, where the random access message 4 or random access message B includes the first information.

[0241] Through this method f2, the SBFD configuration information is explicitly indicated to be effective through random access message 4 or random access message B, which can ensure the flexibility of network device scheduling. Moreover, when the SBFD configuration information is effective, the terminal device has completed the random access process, thereby resolving the conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information during the random access process.

[0242] Method f3: After the terminal device enters the RRC connection state, the network device sends the aforementioned first RRC message to the terminal device, and the first RRC message includes the first information.

[0243] Through this method f3, the network device can clearly indicate that the SBFD configuration information is effective after the terminal device enters the RRC connection state, which can ensure the flexibility of network device scheduling and resolve the conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information during random access.

[0244] In this scenario e1, if the terminal device does not send the first capability information to the network device during the random access process, the first information may be sent by the network device to the terminal device, such as in the following manner f4.

[0245] Method f4 is the same as method f3, that is, after the terminal device enters the RRC connection state, the network device sends a first RRC message to the terminal device.

[0246] Optionally, in mode f4, before the network device sends the first RRC message to the terminal device, the terminal device may send a second RRC message to the network device, where the second RRC message includes the first capability information. In this way, if the terminal device supports SBFD, the network device can send the first information to the terminal device via the first RRC message. That is, while ensuring that the terminal device can use the SBFD configuration information, the network device can further instruct the terminal device to take effect, thereby improving the accuracy of the SBFD configuration information taking effect.

[0247] Scenario e2: If the protocol does not support SBFD for terminal devices in RRC idle or RRC inactive states during the PRACH transmission process (which can also be understood as the random access message 1 transmission process), but supports SBFD for terminal devices in other random access message transmission processes; or, the protocol supports SBFD for terminal devices in RRC idle or RRC inactive states during the PRACH transmission process, but the network device does not enable this function. In scenario e2, the network device does not enable this function, which can be understood as the network device does not configure or activate SBFD for the terminal device during the PRACH transmission process.

[0248] In this scenario e2, if the terminal device sends first capability information to the network device during the random access process, the first information can be predefined, such as the following methods g1-g4, or the first information can also be sent by the network device to the terminal device, such as the following methods g5-g7.

[0249] Mode g1: The first information may include a predefined first rule, and the first rule may include the aforementioned rule 2.

[0250] For example, in the manner g1, if the terminal device sends the first capability information to the network device through the random access message 1 during the random access process, the SBFD configuration information takes effect after the random access message 1 is sent.

[0251] Through this method g1, the effectiveness of the SBFD configuration information is determined by predefined rules, which can reduce the indication signaling overhead, and when the SBFD configuration information takes effect, the terminal device completes the transmission of the random access message 1, thereby resolving the conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information when transmitting the random access message 1.

[0252] Mode g2: The first information may include a predefined first rule, and the first rule may include the aforementioned rule 3.

[0253] For example, in the manner g2, if the terminal device sends the first capability information to the network device via the random access message 3 during the random access process, the SBFD configuration information takes effect after the random access message 3 is sent.

[0254] Through this method g2, the effectiveness of the SBFD configuration information is determined by predefined rules, which can reduce the indication signaling overhead, and when the SBFD configuration information takes effect, the terminal device completes the transmission of the random access message 1, thereby resolving the conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information when transmitting the random access message 1.

[0255] Mode g3: The first information may include a predefined first rule, and the first rule may include the aforementioned rule 4.

[0256] For example, in the manner g3, if the terminal device sends the first capability information to the network device through the random access message A during the random access process, the SBFD configuration information takes effect after the random access message A is sent.

[0257] Through this method g3, the effectiveness of the SBFD configuration information is determined by predefined rules, which can reduce the indication signaling overhead, and when the SBFD configuration information takes effect, the terminal device completes the transmission of the random access message A, thereby resolving the conflict between the effectiveness of the SBFD configuration information and the terminal device's inability to use the SBFD configuration information when transmitting the random access message A.

[0258] Method g4 is the same as the aforementioned method f1, and they can be referred to each other, so they will not be described again here.

[0259] Mode g5: The network device sends a random access message 2 to the terminal device, where the random access message 2 includes the first information.

[0260] Optionally, if the terminal device sends the first capability information to the network device through the random access message 1 during the random access process, the network device may carry the first information through the random access message 2.

[0261] By using this mode g5, when the SBFD configuration information takes effect, the terminal device has completed the transmission of the random access message 1, thereby resolving the conflict between the effectiveness of the SBFD configuration information and the terminal device being unable to use the SBFD configuration information when transmitting the random access message 1.

[0262] Method g6 is the same as the aforementioned method f2, and they can be referred to each other, so they will not be described again here.

[0263] Method g7 is the same as the aforementioned method f3, and they can be referred to each other, so they will not be repeated here.

[0264] In this scenario e2, if the terminal device does not send the first capability information to the network device during the random access process, the first information may be sent by the network device to the terminal device, such as in the following manner g8.

[0265] Method g8 is the same as the aforementioned method f4, and they can be referred to each other, so they will not be described again here.

[0266] Scenario e3: The protocol supports that the terminal device in RRC idle state or RRC inactive state supports SBFD during the random access process, and the network device configures PRACH resources on both SBFD symbols and non-SBFD symbols.

[0267] In this scenario e3, if the terminal device uses the PRACH resource on the SBFD symbol to send the random access preamble code, the first information can be predefined, such as the following method h1.

[0268] Mode h1: The first information may include a predefined first rule, and the first rule may include the aforementioned Rule 2 or Rule 4.

[0269] For example, in the mode f1, the SBFD configuration information takes effect when the terminal device sends a random access preamble to the network device.

[0270] The effect achieved by the method h1 is similar to that of the aforementioned method g1 or method g3, and they can be referred to each other and will not be described in detail here.

[0271] In this scenario e3, if the terminal device uses the PRACH resource on the non-SBFD symbol to send the random access preamble code, the first information is the same as the first information in the aforementioned scenario e2. Please refer to the method g1-method g8 in the aforementioned scenario e2, and no detailed description will be given here.

[0272] In some examples, a time slot containing an SBFD symbol may also be understood as a SBFD time slot.

[0273] In an optional implementation, there may be a switching (transition) time between SBFD time slots (or symbols) or non-SBFD time slots (or symbols). This is primarily due to differences in hardware or software implementations of antennas, filters, and other features of network devices or terminal devices in the two time slots (or symbols), or for reasons such as uplink time synchronization. Specifically, there are several possible implementations for determining whether there is a switching (transition) time between SBFD time slots (or symbols) or non-SBFD time slots (or symbols):

[0274] Possible implementation 1 may be as follows:

[0275] If the previous time slot (or symbol) is a downlink time slot (or symbol) and the next time slot (or symbol) is an SBFD time slot (or symbol), then:

[0276] There is no switching (transition) time between the downlink subbands of the previous time slot (or symbol) and the next time slot (or symbol).

[0277] The switching (transition) time exists between the uplink subbands of the previous time slot (or symbol) and the next time slot (or symbol). For example, the switching (transition) time is X, where X is greater than 0 and the unit of X can be symbol, time slot, subframe, millisecond, microsecond, etc. The switching (transition) time is in the previous time slot (or symbol) and / or the next time slot (or symbol).

[0278] Possible implementation 2 may be as follows:

[0279] If the previous time slot (or symbol) is an SBFD time slot (or symbol) and the next time slot (or symbol) is an uplink time slot (or symbol), then:

[0280] There is a switching (transition) time between the downlink subband of the previous time slot (or symbol) and the next time slot (or symbol). For example, the switching (transition) time is Y, where Y is greater than 0, and the unit of Y can be symbol, time slot, subframe, millisecond, or microsecond. The switching (transition) time is in the previous time slot (or symbol) and / or the next time slot (or symbol). Or,

[0281] A switching (transition) time exists between the uplink subband of the previous time slot (or symbol) and the next time slot (or symbol). For example, the switching (transition) time is Z, where Z is greater than 0 and the unit of Z can be symbol, time slot, subframe, millisecond, microsecond, etc. The switching (transition) time is within the previous time slot (or symbol) and / or the next time slot (or symbol). The relationship between Y and Z is not limited in this application.

[0282] It should be noted that the above-mentioned description of whether there is a switching (transition) time between SBFD time slots (or symbols) or non-SBFD time slots (or symbols) can also be implemented independently without relying on the scheme of the embodiment of the present application. It can also be understood that whether there is a switching (transition) time between SBFD time slots (or symbols) or non-SBFD time slots (or symbols) in any scenario can adopt the description of the above content.

[0283] In some embodiments, the network device described in the aforementioned embodiments configures SBFD configuration information for the terminal device. The SBFD configuration information can be considered as cell-specific SBFD configuration information. The following is an expanded description of how the network device configures SBFD configuration information for the terminal device.

[0284] The current network equipment will also configure the terminal device with cell-specific TDD uplink and downlink configuration information and terminal device-specific TDD uplink and downlink configuration information. The cell-specific TDD uplink and downlink configuration information is used to configure the cell-common TDD uplink and downlink configuration. The cell-common TDD uplink and downlink configuration includes a downlink time slot (or symbol), an uplink time slot (or symbol), and a flexible time slot (or symbol), wherein the downlink time slot (or symbol) is used for downlink transmission, the uplink time slot (or symbol) is used for uplink transmission, and the flexible time slot (or symbol) is used for downlink transmission or uplink transmission. The terminal device-specific TDD uplink and downlink configuration information is used to configure the terminal device-specific TDD uplink and downlink. Specifically, for the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information, the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction, and still needs to maintain downlink or uplink. For the flexible time slots (or symbols) indicated by the cell-specific TDD uplink and downlink configuration information, the TDD uplink and downlink configuration information specific to the terminal device can change its link direction. For example, the TDD uplink and downlink configuration information specific to the terminal device can be indicated as a downlink time slot (or symbol), or as an uplink time slot (or symbol), or still indicated as a flexible time slot (or symbol).

[0285] For example, the relationship between the cell-specific TDD uplink and downlink configuration information, the terminal device-specific TDD uplink and downlink configuration information, and the cell-specific SBFD configuration information is described in detail below. It should be noted that the role of the cell-specific TDD uplink and downlink configuration information and the terminal device-specific TDD uplink and downlink configuration information below can be the same as that of the traditional technology (such as the same as the current cell-specific TDD uplink and downlink configuration information and the terminal device-specific TDD uplink and downlink configuration information described above), or it can be different, and this application does not limit it.

[0286] In an optional implementation manner, the relationship between the cell-specific TDD uplink and downlink configuration information and the cell-specific SBFD configuration information may be as follows:

[0287] The cell-specific SBFD configuration information can configure the SBFD subband on the time slot (or symbol) indicated as the downlink time slot (or symbol) or the flexible time slot (or symbol) by the cell-specific TDD uplink and downlink configuration information. In other words, the cell-specific SBFD configuration information can indicate the downlink time slot (or symbol) or the flexible time slot (or symbol) indicated by the cell-specific TDD uplink and downlink configuration information as the SBFD time slot (or symbol). This application does not limit whether the cell-specific SBFD configuration information can configure the SBFD subband on the time slot (or symbol) indicated as the uplink time slot (or symbol) or the flexible time slot (or symbol) by the cell-specific TDD uplink and downlink configuration information. The above content can also be understood as: at least in the downlink time slot (or symbol) or the flexible time slot (or symbol), the cell-specific SBFD configuration information has a higher priority than the cell-specific TDD uplink and downlink configuration information.

[0288] In an optional implementation, based on the cell-specific TDD uplink and downlink configuration information and the cell-specific SBFD configuration information, the network device can further configure the terminal device with terminal device-specific TDD uplink and downlink configuration information. The relationship between the above three configuration information includes the following possible implementations:

[0289] A first possible implementation may be as follows:

[0290] For time slots (or symbols) that are indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and are not configured as SBFD subbands by the cell-specific SBFD configuration information (or are not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction and still needs to maintain downlink or uplink. Or,

[0291] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured with SBFD subband by the cell-specific SBFD configuration information (or not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink time slot (or symbol), or it can remain a flexible time slot (or symbol). Or,

[0292] For the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information, and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as a SBFD time slot (or symbol)), the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset it to a downlink or uplink or flexible time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband. Or,

[0293] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset it to a downlink or uplink or flexible time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband.

[0294] A second possible implementation may be as follows:

[0295] For time slots (or symbols) that are indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and are not configured as SBFD subbands by the cell-specific SBFD configuration information (or are not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction and still needs to maintain downlink or uplink. Or,

[0296] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured as SBFD subbands by the cell-specific SBFD configuration information (or not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink time slot (or symbol) or still a flexible time slot (or symbol). Or,

[0297] For the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information, and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as the SBFD time slot (or symbol)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband. Or,

[0298] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as SBFD time slots / symbols), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink or flexible time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband.

[0299] A third possible implementation may be as follows:

[0300] For time slots (or symbols) that are indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and are not configured with SBFD subbands by the cell-specific SBFD configuration information (or are not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can configure SBFD subbands for these time slots (or symbols), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures them as SBFD time slots (or symbols). Or,

[0301] For time slots (or symbols) that are indicated as flexible by the cell-specific TDD uplink and downlink configuration information and are not configured with SBFD subbands by the cell-specific SBFD configuration information (or are not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change their link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can configure SBFD subbands for these time slots (or symbols), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures them as SBFD time slots (or symbols). Or,

[0302] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured as SBFD subbands by the cell-specific SBFD configuration information (or not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink time slot (or symbol) or still a flexible time slot (or symbol). Or,

[0303] For the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information, and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as a SBFD time slot (or symbol)), the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite or reset it to a downlink or uplink or flexible time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband. Or,

[0304] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information cannot change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information cannot rewrite / reset it to a downlink or uplink or flexible time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information cannot disable the configuration of the SBFD subband.

[0305] A fourth possible implementation may be as follows:

[0306] For time slots (or symbols) that are indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information and are not configured with SBFD subbands by the cell-specific SBFD configuration information (or are not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can configure SBFD subbands for these time slots (or symbols), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures them as SBFD time slots (or symbols). Or,

[0307] For time slots (or symbols) that are indicated as flexible by the cell-specific TDD uplink and downlink configuration information and are not configured with SBFD subbands by the cell-specific SBFD configuration information (or are not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change their link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can configure SBFD subbands for these time slots (or symbols), or in other words, the terminal device-specific TDD uplink and downlink configuration information configures them as SBFD time slots (or symbols). Or,

[0308] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and not configured as SBFD subbands by the cell-specific SBFD configuration information (or not configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink time slot (or symbol) or still a flexible time slot (or symbol). Or,

[0309] For the time slot (or symbol) indicated as downlink or uplink by the cell-specific TDD uplink and downlink configuration information, and configured with the SBFD subband by the cell-specific SBFD configuration information (or configured as the SBFD time slot (or symbol)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband. Or,

[0310] For the time slots (or symbols) indicated as flexible by the cell-specific TDD uplink and downlink configuration information and configured with the SBFD subband by the cell-specific SBFD subband configuration information (or configured as SBFD time slots (or symbols)), the terminal device-specific TDD uplink and downlink configuration information can change its link direction. Specifically, the terminal device-specific TDD uplink and downlink configuration information can rewrite or reset it to a downlink or uplink or flexible time slot (or symbol) without the SBFD subband configured. In other words, the terminal device-specific TDD uplink and downlink configuration information can disable the configuration of the SBFD subband.

[0311] It can be understood that, in the aforementioned third possible implementation and fourth possible implementation, the terminal device-specific TDD uplink and downlink configuration may be an SBFD configuration for the terminal device.

[0312] It should be noted that the relevant content of the relationship between the cell-specific TDD uplink and downlink configuration information, the terminal device-specific TDD uplink and downlink configuration information and the cell-specific SBFD configuration information described above can also be implemented independently without relying on the solution of the embodiment of the present application, and can also be understood as the relationship between the cell-specific TDD uplink and downlink configuration information, the terminal device-specific TDD uplink and downlink configuration information and the cell-specific SBFD configuration information in any scenario can adopt the description of the above content.

[0313] Based on the above embodiments, the embodiments of the present application further provide a communication device. Referring to FIG12 , the communication device 1200 may include a processing unit 1202. Optionally, the communication device 1200 may further include a transceiver unit 1201. The transceiver unit 1201 is used for the communication device 1200 to communicate, such as receiving information (message or data) or sending information (message or data), and the processing unit 1202 is used to control and manage the actions of the communication device 1200. The processing unit 1202 may also control the steps performed by the transceiver unit 1201.

[0314] Exemplarily, the communication device 1200 may specifically be the terminal device in the above embodiment, the processor of the terminal device, or a chip, or a chip system, or a functional module, etc. Alternatively, the communication device 1200 may specifically be the network device in the above embodiment, the processor in the network device, or a chip, or a chip system, or a functional module, etc.

[0315] In one embodiment, when the communication device 1200 is used to implement the function of the terminal device in the embodiment shown in Figure 8 above, the transceiver unit 1201 can be used to receive sub-band full-duplex SBFD configuration information from the network device, and the SBFD configuration information is used to configure the time domain resources and / or frequency domain resources of the SBFD sub-band; the processing unit 1202 can be used to determine that the SBFD configuration information is effective based on the first information, and the first information is used to indicate that the SBFD configuration information is effective.

[0316] In an optional implementation, when receiving the SBFD configuration information from the network device, the transceiver unit 1201 may be configured to: receive a system information block SIB from the network device, where the SIB includes the SBFD configuration information.

[0317] Exemplarily, the SBFD configuration information includes frequency domain resources of at least one group of SBFD subbands, and the frequency domain resources of each group of SBFD subbands in the at least one group of SBFD subbands correspond to a subcarrier spacing SCS; the first group of SBFD subbands includes multiple subbands, and the first group of SBFD subbands is any one group of SBFD subbands in the at least one group of SBFD subbands.

[0318] Optionally, the frequency domain resources of any subband included in the first group of SBFD subbands are contained in a first carrier, the first carrier corresponds to the first group of SBFD subbands, and the SCS corresponding to the frequency domain resources of the first group of SBFD subbands is the same as the SCS corresponding to the first carrier.

[0319] In some embodiments, the processing unit 1202 can also be used to: determine effective resources based on the activated bandwidth part BWP and the frequency domain resources of the second group of SBFD subbands; the SCS corresponding to the frequency domain resources of the second group of SBFD subbands is the same as the SCS of the activated BWP, and the second group of SBFD subbands is a group of SBFD subbands in the at least one group of SBFD subbands.

[0320] In a possible manner, the SBFD configuration information includes first indication information, where the first indication information is used to indicate a time slot position of the SBFD subband in a first time domain pattern, and the first time domain pattern corresponds to a first cycle length.

[0321] Among them, the first indication information is used to indicate the time slot position of the SBFD subband in the first time domain pattern, and may include: the first indication information is used to indicate the starting time slot and the first number of continuous time slots of the SBFD subband in the first time domain pattern; or, the first indication information is used to indicate the ending time slot and the second number of continuous time slots of the SBFD subband in the first time domain pattern; or, the first indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband in the first time domain pattern.

[0322] Optionally, the SBFD configuration information further includes second indication information, where the second indication information is used to indicate a symbol position of the SBFD subband in a time slot in the first time domain pattern.

[0323] For example, the second indication information is used to indicate the symbol position of the SBFD subband in the time slot in the first time domain pattern, including: the second indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot in the first time domain pattern, or the last M consecutive symbols in the starting time slot in the first time domain pattern, where M is a positive integer; and / or,

[0324] The second indication information is used to indicate the end symbol of the SBFD subband in the end slot in the first time domain pattern, or N consecutive symbols starting in the end slot in the first time domain pattern, where N is a positive integer.

[0325] In yet another possible manner, the SBFD configuration information further includes third indication information, where the third indication information is used to indicate a time slot position of the SBFD subband in a second time domain pattern, where the second time domain pattern corresponds to a second cycle length.

[0326] For example, the third indication information is used to indicate the time slot position of the SBFD subband in the second time domain pattern, including: the third indication information is used to indicate the starting time slot and the third continuous time slot number of the SBFD subband in the second time domain pattern; or, the third indication information is used to indicate the ending time slot and the fourth continuous time slot number of the SBFD subband in the second time domain pattern; or, the third indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband in the second time domain pattern.

[0327] Optionally, the SBFD configuration information further includes fourth indication information, where the fourth indication information is used to indicate a symbol position of the SBFD subband in a time slot in the second time domain pattern.

[0328] Exemplarily, the fourth indication information is used to indicate the symbol position of the SBFD subband in the time slot within the second time domain pattern, including: the fourth indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the second time domain pattern, or the last consecutive P symbols in the starting time slot within the second time domain pattern, where P is a positive integer; and / or

[0329] The fourth indication information is used to indicate the end symbol of the SBFD subband in the end slot in the second time domain pattern, or K consecutive symbols starting in the end slot in the second time domain pattern, where K is a positive integer.

[0330] In another possible embodiment, the time domain resources of the SBFD subband correspond to the reference SCS associated with the cell-specific uplink and downlink time division duplex TDD configuration.

[0331] The reference SCS is used to determine the time domain boundary of the SBFD subband.

[0332] In some embodiments, the transceiver unit 1201 may also be configured to receive a first RRC message from the network device, where the first RRC message includes the first information.

[0333] In some embodiments, the first information includes a predefined first rule, and the first rule includes: determining that the SBFD configuration information is effective according to an RRC establishment message, an RRC recovery message, or an RRC re-establishment message from the network device; or, determining that the SBFD configuration information is effective according to a random access message 1; or, determining that the SBFD configuration information is effective according to a random access message 3; or, determining that the SBFD configuration information is effective according to a random access message A.

[0334] In an optional implementation, the transceiver unit 1201 may also be configured to send first capability information to the network device, where the first capability information is used to indicate that the terminal device supports SBFD.

[0335] In another embodiment, when the communication device 1200 is used to implement the functions of the network device in the embodiment shown in FIG. 8 , the transceiver unit 1201 can be configured to send sub-band full-duplex (SBFD) configuration information to a terminal device, the SBFD configuration information being used to configure time domain resources and / or frequency domain resources of the SBFD subband; and to send first information to the terminal device, the first information being used to indicate that the SBFD configuration information is effective. The processing unit 1202 can be configured to control the operation of the transceiver unit 1201.

[0336] In an optional implementation, when sending the SBFD configuration information to the terminal device, the transceiver unit 1201 may be configured to: send a system information block SIB to the terminal device, where the SIB includes the SBFD configuration information.

[0337] Exemplarily, the SBFD configuration information includes frequency domain resources of at least one group of SBFD subbands, and the frequency domain resources of each group of SBFD subbands in the at least one group of SBFD subbands correspond to a subcarrier spacing SCS; the first group of SBFD subbands includes multiple subbands, and the first group of SBFD subbands is any one group of SBFD subbands in the at least one group of SBFD subbands.

[0338] Optionally, the frequency domain resources of any subband included in the first group of SBFD subbands are contained in a first carrier, the first carrier corresponds to the first group of SBFD subbands, and the SCS corresponding to the frequency domain resources of the first group of SBFD subbands is the same as the SCS corresponding to the first carrier.

[0339] In some embodiments, the SBFD configuration information includes first indication information, where the first indication information is used to indicate a time slot position of the SBFD subband in a first time domain pattern, where the first time domain pattern corresponds to a first cycle length.

[0340] For example, the first indication information is used to indicate the time slot position of the SBFD subband within the first time domain pattern, including: the first indication information is used to indicate the starting time slot and the first number of continuous time slots of the SBFD subband within the first time domain pattern; or, the first indication information is used to indicate the ending time slot and the second number of continuous time slots of the SBFD subband within the first time domain pattern; or, the first indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband within the first time domain pattern.

[0341] Optionally, the SBFD configuration information further includes second indication information, where the second indication information is used to indicate a symbol position of the SBFD subband in a time slot in the first time domain pattern.

[0342] For example, the second indication information is used to indicate the symbol position of the SBFD subband in the time slot within the first time domain pattern, including: the second indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the first time domain pattern, or the last M consecutive symbols in the starting time slot within the first time domain pattern, where M is a positive integer; and / or

[0343] The second indication information is used to indicate the end symbol of the SBFD subband in the end slot within the first time domain pattern, or N consecutive symbols starting from the start symbol in the end slot within the first time domain pattern, where N is a positive integer.

[0344] In some embodiments, the SBFD configuration information further includes third indication information, where the third indication information is used to indicate a time slot position of the SBFD subband within a second time domain pattern, where the second time domain pattern corresponds to a second cycle length.

[0345] For example, the third indication information is used to indicate the time slot position of the SBFD subband in the second time domain pattern, including: the third indication information is used to indicate the starting time slot and the third continuous time slot number of the SBFD subband in the second time domain pattern; or, the third indication information is used to indicate the ending time slot and the fourth continuous time slot number of the SBFD subband in the second time domain pattern; or, the third indication information is used to indicate the starting time slot and the ending time slot of the SBFD subband in the second time domain pattern.

[0346] Optionally, the SBFD configuration information further includes fourth indication information, where the fourth indication information is used to indicate a symbol position of the SBFD subband in a time slot in the second time domain pattern.

[0347] Exemplarily, the fourth indication information is used to indicate the symbol position of the SBFD subband in the time slot within the second time domain pattern, including: the fourth indication information is used to indicate the starting symbol of the SBFD subband in the starting time slot within the second time domain pattern, or the last consecutive P symbols in the starting time slot within the second time domain pattern, where P is a positive integer; and / or

[0348] The fourth indication information is used to indicate the end symbol of the SBFD subband in the end slot within the second time domain pattern, or K consecutive symbols starting from the start symbol in the end slot within the second time domain pattern, where K is a positive integer.

[0349] In some embodiments, the time domain resources of the SBFD subband correspond to a reference SCS associated with a cell-specific uplink and downlink time division duplex (TDD) configuration.

[0350] The reference SCS may be used to determine the time domain boundary of the SBFD subband.

[0351] In one embodiment, when sending the first information to the terminal device, the transceiver unit 1201 can be used to: send a first RRC message to the terminal device, where the first RRC message includes the first information.

[0352] In an example, the transceiver unit 1201 may also be configured to receive first capability information from the terminal device, where the first capability information is used to indicate that the terminal device supports SBFD.

[0353] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. The functional units in the embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0354] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0355] Based on the above embodiments, embodiments of the present application further provide a communication device. Referring to FIG. 13 , a communication device 1300 may include one or more processors 1302. Optionally, the communication device 1300 may further include a transceiver 1301. Optionally, the communication device 1300 may further include at least one memory 1303. The memory 1303 may be located within or outside the communication device 1300. The processor 1302 may control the transceiver 1301 to receive and transmit information, messages, or data.

[0356] Specifically, the processor 1302 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 1302 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0357] The transceiver 1301, the processor 1302, and the memory 1303 are interconnected. Optionally, the transceiver 1301, the processor 1302, and the memory 1303 are interconnected via a bus 1304; the bus 1304 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, FIG13 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0358] In an optional embodiment, the memory 1303 is used to store programs, etc. Specifically, the programs may include program code, which includes computer operating instructions. The memory 1303 may include RAM, or may also include non-volatile memory (non-volatile memory), such as one or more disk storage devices. The processor 1302 executes the application program stored in the memory 1303 to implement the above functions, thereby realizing the functions of the communication device 1300.

[0359] In one embodiment, when the communication device 1300 implements the functions of the terminal device in the aforementioned method embodiment, the transceiver 1301 may implement the transceiver operations performed by the terminal device in the aforementioned method embodiment; and the processor 1302 may implement other operations performed by the terminal device in the aforementioned method embodiment in addition to the transceiver operations. For specific details, please refer to the relevant descriptions in the aforementioned method embodiment and will not be described in detail here.

[0360] In another embodiment, when the communication device 1300 implements the functions of the network device in the aforementioned method embodiment, the transceiver 1301 may implement the transceiver operations performed by the terminal device in the aforementioned method embodiment; and the processor 1302 may implement other operations performed by the network device in the aforementioned method embodiment in addition to the transceiver operations. For specific details, please refer to the relevant descriptions in the aforementioned method embodiment and will not be described in detail here.

[0361] Based on the above embodiments, an embodiment of the present application provides a communication system, which may include the terminal device and / or network device involved in the above embodiments.

[0362] An embodiment of the present application further provides a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

[0363] An embodiment of the present application further provides a computer program product, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.

[0364] An embodiment of the present application also provides a chip or chip system, including one or more processors, which are coupled to at least one memory and are used to call the program in the memory so that the chip or chip system implements the communication method provided by the above method embodiment.

[0365] An embodiment of the present application also provides a chip or a chip system, which is coupled to at least one memory and is used to implement the communication method provided by the above method embodiment.

[0366] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0367] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each flow and / or box in the flow chart and / or block diagram, as well as the combination of the flow chart and / or box in the flow chart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more flow charts and / or one or more boxes in the block diagram.

[0368] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0369] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0370] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A communication method, characterized in that: include: receiving sub-band full-duplex (SBFD) configuration information from a network device, where the SBFD configuration information is used to configure time domain resources and / or frequency domain resources of the SBFD sub-band; It is determined according to first information that the SBFD configuration information is effective, where the first information is used to indicate that the SBFD configuration information is effective.

2. The method according to claim 1, wherein Receiving the SBFD configuration information from the network device includes: A system information block (SIB) is received from the network device, where the SIB includes the SBFD configuration information.

3. The method according to claim 1 or 2, wherein: The method further comprises: receiving a first RRC message from the network device, where the first RRC message includes the first information; or The first information includes a predefined first rule, and the first rule includes: Determining that the SBFD configuration information is effective according to an RRC establishment message, an RRC recovery message, or an RRC re-establishment message from the network device; or Determining, according to random access message 1, that the SBFD configuration information is effective; or Determining, according to random access message 3, that the SBFD configuration information is effective; or The SBFD configuration information is determined to be effective according to the random access message A.

4. The method according to claim 3, wherein The method further comprises: Sending first capability information to the network device, where the first capability information is used to indicate that the terminal device supports SBFD.

5. A communication method, characterized in that: include: Sending sub-band full-duplex SBFD configuration information to the terminal device, where the SBFD configuration information is used to configure time domain resources and / or frequency domain resources of the SBFD sub-band; Sending first information to the terminal device, where the first information is used to indicate that the SBFD configuration information is effective.

6. The method according to claim 5, wherein Sending the SBFD configuration information to the terminal device includes: A system information block (SIB) is sent to the terminal device, where the SIB includes the SBFD configuration information.

7. The method according to claim 5 or 6, wherein: Sending the first information to the terminal device includes: A first RRC message is sent to the terminal device, where the first RRC message includes the first information.

8. The method according to claim 7, wherein The method further comprises: First capability information is received from the terminal device, where the first capability information is used to indicate that the terminal device supports SBFD.

9. The method according to any one of claims 1 to 8, wherein The SBFD configuration information includes frequency domain resources of at least one group of SBFD subbands, and the frequency domain resources of each group of SBFD subbands in the at least one group of SBFD subbands correspond to a subcarrier spacing SCS; the first group of SBFD subbands includes multiple subbands, and the first group of SBFD subbands is any one group of SBFD subbands in the at least one group of SBFD subbands.

10. The method according to claim 9, wherein The frequency domain resources of any subband included in the first group of SBFD subbands are contained in a first carrier, the first carrier corresponds to the first group of SBFD subbands, and the SCS corresponding to the frequency domain resources of the first group of SBFD subbands is the same as the SCS corresponding to the first carrier.

11. The method according to claim 9 or 10, wherein: The method further comprises: The effective resources are determined based on the frequency domain resources of the activated bandwidth part BWP and the second group of SBFD subbands; the SCS corresponding to the frequency domain resources of the second group of SBFD subbands is the same as the SCS of the activated BWP, and the second group of SBFD subbands is a group of SBFD subbands in the at least one group of SBFD subbands.

12. The method according to any one of claims 1 to 11, wherein: The SBFD configuration information includes first indication information, where the first indication information is used to indicate a time slot position of the SBFD subband in a first time domain pattern, where the first time domain pattern corresponds to a first cycle length.

13. The method according to claim 12, wherein: The first indication information is used to indicate a time slot position of the SBFD subband in the first time domain pattern, including: The first indication information is used to indicate the starting time slot and the number of first continuous time slots of the SBFD subband in the first time domain pattern; or, The first indication information is used to indicate the number of end time slots and second continuous time slots of the SBFD subband in the first time domain pattern; or, The first indication information is used to indicate a start time slot and an end time slot of the SBFD subband in the first time domain pattern.

14. The method according to claim 12 or 13, wherein: The SBFD configuration information further includes second indication information, where the second indication information is used to indicate a symbol position of the SBFD subband in a time slot in the first time domain pattern.

15. The method according to claim 14, wherein The second indication information is used to indicate a symbol position of the SBFD subband in a time slot in the first time domain pattern, including: The second indication information is used to indicate a starting symbol of the SBFD subband in a starting time slot in the first time domain pattern, or the last M consecutive symbols in the starting time slot in the first time domain pattern, where M is a positive integer; and / or The second indication information is used to indicate the end symbol of the SBFD subband in the end slot in the first time domain pattern, or N consecutive symbols starting in the end slot in the first time domain pattern, where N is a positive integer.

16. The method according to any one of claims 12 to 15, wherein: The SBFD configuration information further includes third indication information, where the third indication information is used to indicate a time slot position of the SBFD subband in a second time domain pattern, where the second time domain pattern corresponds to a second cycle length.

17. The method according to claim 16, wherein The third indication information is used to indicate a time slot position of the SBFD subband in the second time domain pattern, including: The third indication information is used to indicate the starting time slot and the number of third continuous time slots of the SBFD subband in the second time domain pattern; or, The third indication information is used to indicate the number of end time slots and fourth continuous time slots of the SBFD subband in the second time domain pattern; or, The third indication information is used to indicate a start time slot and an end time slot of the SBFD subband in the second time domain pattern.

18. The method according to claim 16 or 17, wherein: The SBFD configuration information further includes fourth indication information, where the fourth indication information is used to indicate a symbol position of the SBFD subband in a time slot in the second time domain pattern.

19. The method according to claim 18, wherein The fourth indication information is used to indicate a symbol position of the SBFD subband in a time slot in the second time domain pattern, including: The fourth indication information is used to indicate a starting symbol of the SBFD subband in a starting time slot in the second time domain pattern, or the last P consecutive symbols in the starting time slot in the second time domain pattern, where P is a positive integer; and / or The fourth indication information is used to indicate the end symbol of the SBFD subband in the end slot in the second time domain pattern, or K consecutive symbols starting in the end slot in the second time domain pattern, where K is a positive integer.

20. The method according to any one of claims 1 to 11, wherein The time domain resources of the SBFD subband correspond to the reference SCS associated with the cell-specific uplink and downlink time division duplex TDD configuration.

21. The method according to claim 20, wherein The reference SCS is used to determine the time domain boundary of the SBFD subband.

22. A communication device, characterized in that: The method comprises a module or a unit for executing the method according to any one of claims 1 to 4 and 9 to 21.

23. A communication device, characterized in that: The method comprises a module or a unit for executing the method according to any one of claims 5 to 21.

24. A communication device, characterized in that: comprising one or more processors coupled to at least one memory, wherein: The one or more processors are configured to call computer instructions in the memory so that the communication device executes the method according to any one of claims 1-4 and 9-21.

25. A communication device, characterized in that: comprising one or more processors coupled to at least one memory, wherein: The one or more processors are configured to call computer instructions in the memory so as to enable the communication device to execute the method according to any one of claims 5 to 21.

26. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which, when called by the computer, are used to execute the method according to any one of claims 1 to 4, 9 to 21, or the method according to any one of claims 5 to 21.

27. A computer program product, characterized in that The method comprises instructions which, when executed on a computer, cause the method according to any one of claims 1 to 4, 9 to 21, or the method according to any one of claims 5 to 21 to be executed.

28. A chip or a chip system, characterized in that: The chip or chip system is coupled to at least one memory and is used to read and execute program instructions stored in the memory to implement the method as described in any one of claims 1-4, 9-21, or to implement the method as described in any one of claims 5-21.

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