Communication method and device

Abstract

The embodiment of the present application discloses a communication method and apparatus. The method includes: a terminal device sends a first uplink signal to a first network device on at least one first carrier, the first network device detects the first uplink signal on at least one first carrier, and determines the activated carrier based on the signal strength of the first uplink signal on at least one first carrier, and sends first feedback information to the terminal device, the first feedback information includes the information of the activated carrier in at least one first carrier. A corresponding apparatus is also provided. By adopting the scheme of the embodiment of the present application, by determining the signal strength of the first uplink signal sent by the terminal device on at least one first carrier, the information of the activated carrier in at least one first carrier can be determined more accurately, thereby improving the reliability of communication on the activated carrier.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and device. Background Art

[0002] The fifth generation (5 th In the new radio (NR) communication system of the fifth generation (5G), the uplink transmission of the terminal device is usually power-limited, resulting in that the received signal strength of the uplink transmission signal when it arrives at the base station may not be sufficient to ensure its coverage performance. In addition, the uplink spectrum may not be enough, so it is impossible to rely on the retransmission of the data to ensure its uplink coverage performance. At present, the NR communication system introduces supplementary uplink (SUL) as an alternative when the uplink coverage in the NR communication system is insufficient, that is, the NR communication system supports the configuration of multiple uplink carriers in one cell. The low frequency band of the long term evolution (LTE) communication system usually has better coverage performance. Therefore, when implementing SUL, it is considered to use the lower frequency band of the LTE communication system (for example, 700MHz, 1.8GHz or 2.1GHz, etc.) for NR uplink transmission. Specifically, when the terminal device uses the frequency band of the LTE communication system for NR uplink transmission, it can reuse the frequency band with the uplink time division duplex (TDD) or frequency division duplex (FDD) in the LTE communication system.

[0003] In addition, the use of higher frequency bands for SUL can be considered. For example, the 4.9 GHz band can provide spectrum resources with higher bandwidth, thus providing more sufficient uplink resources. Therefore, the expansion of uplink coverage can be considered on this band.

[0004] When using the lower frequency band of the LTE communication system to implement SUL, the terminal device can detect the signal quality on the frequency band of the NR communication system. When the signal quality on the frequency band is lower than a preset threshold, it is determined that the frequency band cannot meet its access requirements, so it can switch to the lower frequency band of the LTE communication system for access. However, for higher frequency bands such as the 4.9GHz frequency band, when the signal quality on the frequency band of the NR communication system is not ideal, switching to a higher frequency band does not guarantee that the signal strength will be good. Therefore, the current SUL access rules are not applicable to the situation where SUL is implemented using higher frequency bands, and a new access mechanism needs to be designed. For example, when the carrier included in the higher frequency band such as 4.9GHz is a full uplink carrier or an uplink-dominated carrier, how to perform effective measurements to complete effective access on the frequency band and determine the available active carrier among multiple carriers on the frequency band is a problem to be solved. Summary of the invention

[0005] The embodiments of the present application provide a communication method and device to more accurately determine an activated carrier and improve the reliability of communication on the activated carrier.

[0006] In a first aspect, a communication method is provided, the method comprising: a terminal device sending a first uplink signal to a first network device on at least one first carrier; and the terminal device receiving first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier. In this aspect, by determining the signal strength of the first uplink signal sent by the terminal device on at least one first carrier, the information of the activated carrier in the at least one first carrier can be determined more accurately, thereby improving the reliability of communication on the activated carrier.

[0007] In combination with the first aspect, in a possible implementation, the first feedback information also includes a time advance value corresponding to the activated carrier, the time advance value corresponds to at least one activated carrier, or the time advance value corresponds to at least one activated carrier one-to-one, or the time advance value corresponds to at least one activated carrier group. In this implementation, in addition to being used for uplink measurement, the first uplink signal can also be used for random access at the same time, saving signaling overhead and improving communication efficiency.

[0008] In combination with the first aspect, in another possible implementation, the first uplink signal may be a sounding reference signal, a preamble, a demodulation reference signal, a channel state information-reference signal, or any defined sequence.

[0009] In combination with the first aspect, in yet another possible implementation, the first uplink signal is used for timing advance acquisition and uplink measurement.

[0010] In combination with the first aspect, in another possible implementation, the first feedback information is a random access response message or system information.

[0011] In combination with the first aspect, in another possible implementation, the first uplink signal is a first preamble sequence, and the first uplink signal is used for random access and uplink measurement.

[0012] In combination with the first aspect, in another possible implementation, the information of the activated carrier is also used to indicate that some or all of the unlicensed resources on the activated carrier are activated. In this implementation, the terminal device triggers the activation of the unlicensed resources while activating the carrier, so that uplink transmission can be performed on the activated carrier and the unlicensed resources.

[0013] In combination with the first aspect, in another possible implementation, the terminal device receiving the first feedback information includes: the terminal device receiving the first feedback information from the second network device; or the terminal device receiving the first feedback information from the first network device. In this implementation, if the first carrier is a fully uplink carrier, the first network device can send information about activating the carrier through the second network device; if the first carrier is an uplink-dominated carrier, the first network device can send the information about activating the carrier through a small number of downlink time slots.

[0014] In combination with the first aspect, in another possible implementation, the terminal device receives the first feedback information from the first network device, including: the terminal device receives the first feedback information from the first network device through a first time slot, and the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0015] In combination with the first aspect, in another possible implementation, the first feedback information also includes first identification information and / or second identification information corresponding to the terminal device; wherein the first identification information includes at least one of the following: a cell wireless network temporary identification, a sequence identification corresponding to the uplink signal; the second identification information includes at least one of the following: a sequence identification corresponding to the uplink signal, a resource identification corresponding to the uplink signal.

[0016] With reference to the first aspect, in yet another possible implementation, the sequence identifier corresponding to the uplink signal is a sequence identifier of the uplink signal itself.

[0017] In combination with the first aspect, in another possible implementation, the first carrier belongs to a carrier in a first carrier group, and the first carrier group has a common time advance value. In this implementation, the first carrier group has a common time advance value, and there is no need to determine the time advance value for each first carrier in the first carrier group, thereby improving communication efficiency.

[0018] In a second aspect, a communication method is provided, the method comprising: a first network device detects a first uplink signal on at least one first carrier; the first network device determines the signal strength of the first uplink signal on the at least one first carrier; the first network device determines an activated carrier in the at least one first carrier according to the signal strength of the first uplink signal on the at least one first carrier; and the first network device sends first feedback information, the first feedback information including information of the activated carrier in the at least one first carrier. In this aspect, by determining the signal strength of the first uplink signal sent by the terminal device on at least one first carrier, the information of the activated carrier in the at least one first carrier can be determined more accurately, thereby improving the reliability of communication on the activated carrier.

[0019] In combination with the second aspect, in a possible implementation, the first feedback information also includes a time advance value corresponding to the activated carrier, the time advance value corresponds to at least one activated carrier, or the time advance value corresponds one-to-one with at least one activated carrier, or the time advance value corresponds to at least one activated carrier group.

[0020] In combination with the second aspect, in another possible implementation, the first feedback information is a random access response message or system information.

[0021] In combination with the second aspect, in another possible implementation, the first uplink signal is a first preamble sequence, and the first uplink signal is used for random access and uplink measurement.

[0022] In conjunction with the second aspect, in another possible implementation, the first uplink signal is used to obtain a timing advance value and uplink measurement. The first uplink signal includes a sounding reference signal, a preamble, a demodulation reference signal, a channel state information-reference signal, or any defined sequence.

[0023] In combination with the second aspect, in another possible implementation, the information of the activated carrier is a first carrier determined by the first network device based on measurement of the first uplink signal.

[0024] In combination with the second aspect, in another possible implementation, the first network device sending the first feedback information includes: the first network device sending first indication information to the second network device, the first indication information including information of the activated carrier among the at least one first carrier; or, the first network device sending the first feedback information to the terminal device.

[0025] In combination with the second aspect, in another possible implementation, the first network device sends the first feedback information to the terminal device, including: the first network device sends the first feedback information through a first time slot, and the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0026] In combination with the second aspect, in another possible implementation, the first feedback information also includes the first identification information and / or second identification information corresponding to the terminal device; wherein the first identification information includes at least one of the following: a cell wireless network temporary identification, a sequence identification corresponding to the uplink signal; the second identification information includes at least one of the following: a sequence identification corresponding to the uplink signal, a resource identification corresponding to the uplink signal.

[0027] In combination with the second aspect, in yet another possible implementation, the sequence identifier corresponding to the uplink signal is a sequence identifier of the uplink signal itself.

[0028] In combination with the second aspect, in yet another possible implementation, the first carrier belongs to a carrier in a first carrier group, and the first carrier group has a common time advance value.

[0029] In a third aspect, a communication method is provided, the method comprising: a terminal device detecting a downlink reference signal from a first network device on at least one first carrier; the terminal device determining the signal strength of the downlink reference signal; and when the signal strength of the downlink reference signal is greater than or equal to a first set value, the terminal device sends uplink information to the first network device on the unlicensed resources corresponding to the activated carrier. In this aspect, the terminal device can send uplink information to the first network device on the unlicensed resources corresponding to the activated carrier when the signal strength of the downlink reference signal is strong, thereby improving the reliability of uplink transmission.

[0030] In a fourth aspect, a communication method is provided, the method comprising: a first network device sending a downlink reference signal on at least one first carrier; and the first network device detecting uplink information from a terminal device on unauthorized resources corresponding to an activated carrier.

[0031] In a fifth aspect, a communication method is provided, the method comprising: a terminal device detecting a downlink reference signal from a first network device on at least one first carrier; the terminal device determining the signal strength of the downlink reference signal; and when the signal strength of the downlink reference signal is greater than a second set value, the terminal device sending a first uplink signal to the first network device on the at least one first carrier. In this aspect, the terminal device can send an uplink measurement signal to the first network device when the signal strength of the downlink reference signal is strong, thereby avoiding redundant transmission when far away from the first network device and reducing the power consumption of the terminal device.

[0032] In conjunction with the fifth aspect, in a possible implementation, the method further includes: the terminal device receives first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier. In this implementation, the first feedback information includes information of the activated carrier, and the information of the activated carrier is determined by the first network device according to the signal strength of the first uplink signal, so that the terminal device can use the information of the activated carrier to reliably transmit information.

[0033] In conjunction with the fifth aspect, in another possible implementation, the first feedback information further includes second indication information, and the second indication information is used to indicate the activated unlicensed resource. In this implementation, the first feedback information includes information of activating the carrier and the second indication information, so that information transmission on the unlicensed resource can be triggered while activating the carrier.

[0034] In conjunction with the fifth aspect, in another possible implementation, the first feedback information further includes an offset value of the uplink timing advance. In this implementation, the first uplink signal can be used for random access in addition to uplink measurement, thereby saving signaling overhead and improving communication efficiency.

[0035] In conjunction with the fifth aspect, in another possible implementation, the method further includes: determining an initial uplink timing advance according to the downlink reference signal. In this implementation, the initial uplink timing advance can be determined according to the downlink reference signal, avoiding re-acquisition of the uplink timing advance, thereby improving communication efficiency.

[0036] In combination with the fifth aspect, in another possible implementation, the downlink reference signal is a physical broadcast channel, or a synchronization signal block, or a channel state information-reference signal.

[0037] In combination with the fifth aspect, in another possible implementation, the method further includes: the terminal device receives first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, unlicensed resource set identifier, the trigger indication information is used to activate the unlicensed resource corresponding to the activated carrier; or the terminal device receives second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, the second downlink control information includes the trigger indication information. In this implementation, newly defined downlink control information can be used or existing downlink control information can be reused to indicate the transmission parameters of the uplink measurement.

[0038] In a sixth aspect, a communication method is provided, the method comprising: a first network device sending a downlink reference signal on at least one first carrier; and the first network device detecting a first uplink signal sent by the terminal device on the at least one first carrier.

[0039] In combination with the sixth aspect, in a possible implementation, the method also includes: the first network device determines the signal strength of the first uplink signal on the at least one first carrier; the first network device determines the activated carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the first network device sends first feedback information, the first feedback information including information of the activated carrier in the at least one first carrier.

[0040] In combination with the sixth aspect, in another possible implementation, the first network device sending the first feedback information includes: the first network device sending first indication information to the second network device, the first indication information including information of an activated carrier in at least one first carrier; or, the first network device sending the first feedback information to the terminal device.

[0041] In combination with the sixth aspect, in another possible implementation, the first feedback information includes second indication information, and the second indication information is used to indicate the activated unauthorized resources.

[0042] In combination with the sixth aspect, in another possible implementation, the first feedback information includes an offset value of the uplink timing advance.

[0043] In combination with the sixth aspect, in another possible implementation, the method also includes: the first network device sends first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the first network device sends second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0044] In a seventh aspect, a communication device is provided for executing the method in the first aspect or any possible implementation of the first aspect. The communication device may be a terminal device in the first aspect or any possible implementation of the first aspect, or a module applied to a terminal device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the above method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes at least one module or unit corresponding to the above function.

[0045] In combination with the above-mentioned seventh aspect, in a possible implementation, the communication device includes: a transceiver unit; wherein the transceiver unit is used to send a first uplink signal to a first network device on at least one first carrier; and the transceiver unit is also used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

[0046] Optionally, the transceiver unit is further used to receive the first feedback information from a second network device; or, the transceiver unit is further used to receive the first feedback information from the first network device.

[0047] Optionally, the transceiver unit is further used to receive the first feedback information from the first network device through a first time slot, where the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0048] In combination with the above-mentioned seventh aspect, in another possible implementation, the communication device includes: an input interface, an output interface and a processing circuit; wherein the output interface is used to send a first uplink signal to a first network device on at least one first carrier; and the input interface is used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

[0049] Optionally, the input interface is further used to receive the first feedback information from a second network device; or, the input interface is further used to receive the first feedback information from the first network device.

[0050] Optionally, the input interface is further used to receive the first feedback information from the first network device through a first time slot, where the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0051] Exemplarily, the communication device also includes a memory, which is coupled to the at least one processor, and the at least one processor is used to run program instructions stored in the memory so that the communication device executes the method in the above-mentioned first aspect or any possible implementation of the first aspect.

[0052] In a possible implementation, the memory is used to store program instructions and data. The memory is coupled to the at least one processor, and the at least one processor can call and execute the program instructions stored in the memory, so that the communication device performs the method in the first aspect or any possible implementation of the first aspect.

[0053] Exemplarily, the communication device further includes a communication interface, which is used for the communication device to communicate with other devices. When the communication device is a terminal, the communication interface is a transceiver, an input / output interface, or a circuit.

[0054] In a possible design, the communication device includes: at least one processor and a communication interface, which are used to execute the method in the first aspect or any possible implementation of the first aspect, specifically including: the at least one processor uses the communication interface to communicate with the outside; the at least one processor is used to run a computer program so that the communication device executes the method in the first aspect or any possible implementation of the first aspect. It can be understood that the outside can be an object other than the processor, or an object other than the communication device.

[0055] In another possible design, the communication device is a chip or a chip system. The communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0056] Among them, the technical effects brought about by any design method in the seventh aspect can refer to the technical effects brought about by different design methods in the above-mentioned first aspect, and will not be repeated here.

[0057] In an eighth aspect, a communication device is provided for executing the method in the second aspect or any possible implementation of the second aspect. The communication device may be the first network device in the second aspect or any possible implementation of the second aspect, or a module applied to the first network device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the above method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes at least one module or unit corresponding to the above function.

[0058] In combination with the above-mentioned eighth aspect, in a possible implementation, the communication device includes: a transceiver unit and a processing unit; the processing unit is used to detect a first uplink signal on at least one first carrier; the processing unit is also used to determine the signal strength of the first uplink signal on the at least one first carrier; the processing unit is also used to determine the activated carrier in the at least one first carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the transceiver unit is used to send first feedback information, and the first feedback information includes information of the activated carrier in the at least one first carrier.

[0059] Optionally, the transceiver unit is further used to send first indication information to the second network device, where the first indication information includes information of an activated carrier in the at least one first carrier; or, the transceiver unit is further used to send the first feedback information to the terminal device.

[0060] Optionally, the transceiver unit is further used to send the first feedback information through a first time slot, where the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0061] In combination with the above-mentioned eighth aspect, in another possible implementation, the communication device includes: an input interface, an output interface and a processing circuit; the processing circuit is used to detect a first uplink signal on at least one first carrier; the processing circuit is also used to determine the signal strength of the first uplink signal on the at least one first carrier; the processing circuit is also used to determine the activated carrier in the at least one first carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the output interface is used to send first feedback information, and the first feedback information includes information of the activated carrier in the at least one first carrier.

[0062] Optionally, the output interface is further used to send first indication information to the second network device, wherein the first indication information includes information of an activated carrier in the at least one first carrier; or, the output interface is further used to send the first feedback information to the terminal device.

[0063] Optionally, the output interface is further used to send the first feedback information through a first time slot, where the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0064] Exemplarily, the communication device also includes a memory, which is coupled to the at least one processor, and the at least one processor is used to run program instructions stored in the memory so that the communication device executes the method in the above-mentioned second aspect or any possible implementation of the second aspect.

[0065] In a possible implementation, the memory is used to store program instructions and data. The memory is coupled to the at least one processor, and the at least one processor can call and execute the program instructions stored in the memory, so that the communication device executes the method in the above second aspect or any possible implementation of the second aspect.

[0066] Exemplarily, the communication device further includes a communication interface, which is used for the communication device to communicate with other devices. When the communication device is an access network device, the communication interface is a transceiver, an input / output interface, or a circuit.

[0067] In a possible design, the communication device includes: at least one processor and a communication interface, which are used to execute the method in the second aspect or any possible implementation of the second aspect, specifically including: the at least one processor uses the communication interface to communicate with the outside; the at least one processor is used to run a computer program so that the communication device executes the method in the second aspect or any possible implementation of the second aspect. It can be understood that the outside can be an object other than the processor, or an object other than the communication device.

[0068] In another possible design, the communication device is a chip or a chip system. The communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0069] Among them, the technical effects brought about by any design method in the eighth aspect can refer to the technical effects brought about by different design methods in the above-mentioned second aspect, and will not be repeated here.

[0070] In the ninth aspect, a communication device is provided for executing the method in the third aspect or any possible implementation of the third aspect. The communication device may be a terminal device in the third aspect or any possible implementation of the third aspect, or a module applied to a terminal device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the above method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes at least one module or unit corresponding to the above function.

[0071] In combination with the above-mentioned ninth aspect, in a possible implementation, the communication device includes: a processing unit and a transceiver unit; wherein the processing unit is used to detect a downlink reference signal from a first network device on at least one first carrier; the processing unit is also used to determine the signal strength of the downlink reference signal; and the transceiver unit is used to send uplink information to the first network device on the unauthorized resources corresponding to the activated carrier when the signal strength of the downlink reference signal is greater than or equal to a first set value.

[0072] In combination with the above-mentioned ninth aspect, in another possible implementation, the communication device includes: an input interface, an output interface and a processing circuit; wherein the processing circuit is used to detect a downlink reference signal from a first network device on at least one first carrier; the processing circuit is also used to determine the signal strength of the downlink reference signal; and the output interface is used to send uplink information to the first network device on the unauthorized resources corresponding to the activated carrier when the signal strength of the downlink reference signal is greater than or equal to a first set value.

[0073] Exemplarily, the communication device also includes a memory, which is coupled to the at least one processor, and the at least one processor is used to run program instructions stored in the memory so that the communication device executes the method in the above-mentioned third aspect or any possible implementation of the third aspect.

[0074] In a possible implementation, the memory is used to store program instructions and data. The memory is coupled to the at least one processor, and the at least one processor can call and execute the program instructions stored in the memory, so that the communication device executes the method in the third aspect or any possible implementation of the third aspect.

[0075] Exemplarily, the communication device further includes a communication interface, which is used for the communication device to communicate with other devices. When the communication device is a terminal, the communication interface is a transceiver, an input / output interface, or a circuit.

[0076] In a possible design, the communication device includes: at least one processor and a communication interface, which are used to execute the method in the third aspect or any possible implementation of the third aspect, specifically including: the at least one processor uses the communication interface to communicate with the outside; the at least one processor is used to run a computer program so that the communication device executes the method in the third aspect or any possible implementation of the third aspect. It can be understood that the outside can be an object other than the processor, or an object other than the communication device.

[0077] In another possible design, the communication device is a chip or a chip system. The communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0078] Among them, the technical effects brought about by any design method in the ninth aspect can refer to the technical effects brought about by different design methods in the above-mentioned third aspect, and will not be repeated here.

[0079] In the tenth aspect, a communication device is provided for executing the method in the fourth aspect or any possible implementation of the fourth aspect. The communication device may be the first network device in the fourth aspect or any possible implementation of the fourth aspect, or a module applied to the first network device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the above method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes at least one module or unit corresponding to the above function.

[0080] In combination with the above-mentioned tenth aspect, in a possible implementation, the communication device includes: a transceiver unit and a processing unit; wherein the transceiver unit is used to send a downlink reference signal on at least one first carrier; and the processing unit is used to detect uplink information from a terminal device on the unauthorized resources corresponding to the activated carrier.

[0081] In combination with the above-mentioned tenth aspect, in another possible implementation, the communication device includes: an input interface, an output interface and a processing circuit; the output interface is used to send a downlink reference signal on at least one first carrier; and the processing circuit is used to detect uplink information from a terminal device on the unauthorized resources corresponding to the activated carrier.

[0082] Exemplarily, the communication device also includes a memory, which is coupled to the at least one processor, and the at least one processor is used to run program instructions stored in the memory so that the communication device executes the method in the above-mentioned fourth aspect or any possible implementation of the fourth aspect.

[0083] In a possible implementation, the memory is used to store program instructions and data. The memory is coupled to the at least one processor, and the at least one processor can call and execute the program instructions stored in the memory, so that the communication device performs the method in the fourth aspect or any possible implementation of the fourth aspect.

[0084] Exemplarily, the communication device further includes a communication interface, which is used for the communication device to communicate with other devices. When the communication device is an access network device, the communication interface is a transceiver, an input / output interface, or a circuit.

[0085] In a possible design, the communication device includes: at least one processor and a communication interface, which are used to execute the method in the fourth aspect or any possible implementation of the fourth aspect, specifically including: the at least one processor uses the communication interface to communicate with the outside; the at least one processor is used to run a computer program so that the communication device executes the method in the fourth aspect or any possible implementation of the fourth aspect. It can be understood that the outside can be an object other than the processor, or an object other than the communication device.

[0086] In another possible design, the communication device is a chip or a chip system. The communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0087] Among them, the technical effects brought about by any design method in the tenth aspect can refer to the technical effects brought about by different design methods in the above-mentioned fourth aspect, and will not be repeated here.

[0088] In the eleventh aspect, a communication device is provided for executing the method in the fifth aspect or any possible implementation of the fifth aspect. The communication device may be a terminal device in the fifth aspect or any possible implementation of the fifth aspect, or a module applied to a terminal device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the above method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes at least one module or unit corresponding to the above function.

[0089] In combination with the above-mentioned eleventh aspect, in a possible implementation, the communication device includes: a processing unit and a transceiver unit; wherein the processing unit is used to detect a downlink reference signal from a first network device on at least one first carrier; the processing unit is also used to determine the signal strength of the downlink reference signal; and the transceiver unit is used to send a first uplink signal to the first network device on the at least one first carrier when the signal strength of the downlink reference signal is greater than a second set value.

[0090] Optionally, the transceiver unit is further used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

[0091] Optionally, the processing unit is further used to determine an initial uplink timing advance according to the downlink reference signal.

[0092] Optionally, the transceiver unit is further used to receive first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, and unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the transceiver unit is further used to receive second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0093] In combination with the above-mentioned eleventh aspect, in another possible implementation, the communication device includes: an input interface, an output interface and a processing circuit; wherein the processing circuit is used to detect a downlink reference signal from a first network device on at least one first carrier; the processing circuit is also used to determine the signal strength of the downlink reference signal; and the output interface is used to send a first uplink signal to the first network device on the at least one first carrier when the signal strength of the downlink reference signal is greater than a second set value.

[0094] Optionally, the input interface is further used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

[0095] Optionally, the processing circuit is further used to determine an initial uplink timing advance according to the downlink reference signal.

[0096] Optionally, the input interface is also used to receive first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, and unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the input interface is also used to receive second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0097] Exemplarily, the communication device also includes a memory, which is coupled to the at least one processor, and the at least one processor is used to run program instructions stored in the memory so that the communication device executes the method in the above-mentioned fifth aspect or any possible implementation of the fifth aspect.

[0098] In a possible implementation, the memory is used to store program instructions and data. The memory is coupled to the at least one processor, and the at least one processor can call and execute the program instructions stored in the memory, so that the communication device executes the method in the fifth aspect or any possible implementation of the fifth aspect.

[0099] Exemplarily, the communication device further includes a communication interface, which is used for the communication device to communicate with other devices. When the communication device is a terminal, the communication interface is a transceiver, an input / output interface, or a circuit.

[0100] In a possible design, the communication device includes: at least one processor and a communication interface, which are used to execute the method in the fifth aspect or any possible implementation of the fifth aspect, specifically including: the at least one processor uses the communication interface to communicate with the outside; the at least one processor is used to run a computer program so that the communication device executes the method in the fifth aspect or any possible implementation of the fifth aspect. It can be understood that the outside can be an object other than the processor, or an object other than the communication device.

[0101] In another possible design, the communication device is a chip or a chip system. The communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0102] Among them, the technical effects brought about by any design method in the eleventh aspect can refer to the technical effects brought about by different design methods in the above-mentioned fifth aspect, and will not be repeated here.

[0103] In the twelfth aspect, a communication device is provided for executing the method in the sixth aspect or any possible implementation of the sixth aspect. The communication device may be the first network device in the sixth aspect or any possible implementation of the sixth aspect, or a module applied to the first network device, such as a chip or a chip system. The communication device includes a module, unit, or means corresponding to the above method, and the module, unit, or means may be implemented by hardware, software, or by executing the corresponding software implementation by hardware. The hardware or software includes at least one module or unit corresponding to the above function.

[0104] In combination with the above-mentioned twelfth aspect, in a possible implementation, the communication device includes: a transceiver unit and a processing unit; the transceiver unit is used to send a downlink reference signal on at least one first carrier; and the processing unit is used to detect a first uplink signal sent by the terminal device on the at least one first carrier.

[0105] Optionally, the processing unit is further used to determine the signal strength of the first uplink signal on the at least one first carrier; the processing unit is further used to determine the activated carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the transceiver unit is further used to send first feedback information, the first feedback information including information of the activated carrier in the at least one first carrier.

[0106] Optionally, the transceiver unit is used to send first indication information to the second network device, where the first indication information includes information of an activated carrier in at least one first carrier; or, the transceiver unit is also used to send the first feedback information to the terminal device.

[0107] Optionally, the transceiver unit is used to send first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, and unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the transceiver unit is used to send second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0108] In combination with the above-mentioned twelfth aspect, in another possible implementation, the communication device includes: an input interface, an output interface and a processing circuit; wherein the output interface is used to send a downlink reference signal on at least one first carrier; and the processing circuit is used to detect a first uplink signal sent by the terminal device on the at least one first carrier.

[0109] Optionally, the processing circuit is also used to determine the signal strength of the first uplink signal on the at least one first carrier; the processing circuit is also used to determine the activated carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the output interface is also used to send first feedback information, the first feedback information including information of the activated carrier in the at least one first carrier.

[0110] Optionally, the output interface is used to send first indication information to the second network device, where the first indication information includes information of an activated carrier in at least one first carrier; or, the output interface is also used to send the first feedback information to the terminal device.

[0111] Optionally, the output interface is used to send first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, and unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the output interface is used to send second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0112] Exemplarily, the communication device also includes a memory, which is coupled to the at least one processor, and the at least one processor is used to run program instructions stored in the memory so that the communication device executes the method in the above-mentioned sixth aspect or any possible implementation of the sixth aspect.

[0113] In a possible implementation, the memory is used to store program instructions and data. The memory is coupled to the at least one processor, and the at least one processor can call and execute the program instructions stored in the memory, so that the communication device executes the method in the sixth aspect or any possible implementation of the sixth aspect.

[0114] Exemplarily, the communication device further includes a communication interface, which is used for the communication device to communicate with other devices. When the communication device is an access network device, the communication interface is a transceiver, an input / output interface, or a circuit.

[0115] In a possible design, the communication device includes: at least one processor and a communication interface, which are used to execute the method in the sixth aspect or any possible implementation of the sixth aspect, specifically including: the at least one processor uses the communication interface to communicate with the outside; the at least one processor is used to run a computer program so that the communication device executes the method in the sixth aspect or any possible implementation of the sixth aspect. It can be understood that the outside can be an object other than the processor, or an object other than the communication device.

[0116] In another possible design, the communication device is a chip or a chip system. The communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0117] Among them, the technical effects brought about by any design method in the twelfth aspect can refer to the technical effects brought about by different design methods in the above-mentioned sixth aspect, and will not be repeated here.

[0118] In the thirteenth aspect, a communication system is provided, comprising the communication device in the seventh aspect or any one of the implementations of the seventh aspect, and the communication device in the eighth aspect or any one of the implementations of the eighth aspect.

[0119] In a fourteenth aspect, a communication system is provided, comprising the communication device in the above-mentioned ninth aspect or any one of the implementations of the ninth aspect, and the communication device in the tenth aspect or any one of the implementations of the tenth aspect.

[0120] In a fifteenth aspect, a communication system is provided, comprising the communication device in the eleventh aspect or any one implementation of the eleventh aspect, and the communication device in the twelfth aspect or any one implementation of the twelfth aspect.

[0121] In a sixteenth aspect, a computer-readable storage medium is provided, storing a computer program, and when the computer program is run on a computer, the method described in the above aspects or any one of the aspects is executed.

[0122] In the seventeenth aspect, a computer program product is provided, which, when executed on a computer, enables the method described in the above aspects or any one of the aspects to be implemented to be executed.

[0123] In an eighteenth aspect, a computer program is provided, which, when executed on a computer, enables the method described in the above aspects or any one of the aspects to be implemented to be executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0124] Figure 1 A schematic diagram of the network structure involved in the embodiment of the present application;

[0125] Figure 2 A schematic diagram of a communication system involved in an embodiment of the present application;

[0126] Figure 3 A schematic diagram of the structure of a communication device 300 provided in an embodiment of the present application;

[0127] Figure 4 A flow chart of a communication method provided in an embodiment of the present application;

[0128] Figure 5 A further flow chart of a communication method provided in an embodiment of the present application;

[0129] Figure 6 A further flow chart of a communication method provided in an embodiment of the present application;

[0130] Figure 7 A further flow chart of a communication method provided in an embodiment of the present application;

[0131] Figure 8A further flow chart of a communication method provided in an embodiment of the present application;

[0132] Fig. 9 A further flow chart of a communication method provided in an embodiment of the present application;

[0133] Fig.10 A further flow chart of a communication method provided in an embodiment of the present application;

[0134] Fig.11 A schematic diagram of the structure of the communication device 110 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0135] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0136] Figure 1 Schematic diagram of the network structure involved in the embodiment of the present application. In the embodiment of the present application, the terminal device can be located at the macro base station (such as Figure 1 Cell#A in the example) and micro base station (such as Figure 1 Within the coverage of Cell#B in the example, the terminal device can establish a communication connection with the macro base station and the micro base station. Among them, Cell#A occupies a lower frequency band, for example, a 700MHz band, an 800MHz band, a 2GHz band, a 1.9GHz band, a 2.1GHz band or a 2.5GHz band. Cell#B occupies a higher frequency band, for example, a 3.5GHz band or a 4.9GHz band. The higher frequency band can be understood as any frequency band higher than 3.5GHz, and any frequency band mentioned here also includes millimeter wave bands. For example, the higher frequency band of 4.9GHz may include at least one carrier, which may be a full uplink carrier or an uplink dominant (UL dominant) carrier.

[0137] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, fifth generation (5G) system or new radio (NR). The 5G mobile communication system involved in the embodiments of the present application includes a non-standalone (NSA) 5G mobile communication system or a standalone (SA) 5G mobile communication system. The technical solutions provided in the embodiments of the present application can also be applied to future communication systems, such as the sixth generation (6G) mobile communication system. The communication system involved in the embodiments of the present application can also be a land public mobile communication network (PLMN) network, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), a vehicle network communication system or other communication systems.

[0138] See also Figure 2 , Figure 2 A schematic diagram of a communication system involved in an embodiment of the present application is given. The communication system may include a first network device 201, a second network device 202, and a terminal device 203 connected to the first network device 201 and the second network device 202. The first network device 201 may be Figure 1 The micro base station occupies a higher frequency band, such as the 4.9 GHz frequency band; the second network device 202 may be Figure 1 The macro base station occupies a lower frequency band, for example, a 2.5 GHz frequency band.

[0139] The terminal device 203 in the embodiment of the present application may refer to an access terminal, a user unit, a user station, a mobile station, a mobile station, a relay station, a remote station, a remote terminal, a mobile device, a user terminal (user terminal), a user equipment (user equipment, UE), a terminal (terminal), a wireless communication device, a user agent, a user device, a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved PLMN or a terminal in a future Internet of Vehicles, etc., and the embodiment of the present application is not limited to this.

[0140] As an example but not limitation, in an embodiment of the present application, the terminal device 203 can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality terminal, an augmented reality terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, etc.

[0141] As an example and not a limitation, in the embodiments of the present application, wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0142] In addition, in the embodiment of the present application, the terminal device 203 can also be a terminal in the Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-to-object interconnection. In the embodiment of the present application, IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrow band (NB) technology.

[0143] In addition, in an embodiment of the present application, the terminal device 203 may also include sensors such as smart printers, train detectors, and gas stations. Its main functions include collecting data (partial terminals), receiving control information and downlink data from access network devices, and sending electromagnetic waves to transmit uplink data to access network devices.

[0144] Optionally, the first network device 201 / second network device 202 in the embodiment of the present application can be any communication device with wireless transceiver function for communicating with the terminal device 203. The first network device 201 / second network device 202 includes but is not limited to: evolved node B (eNB), baseband unit (BBU), access point (AP) in wireless fidelity (WIFI) system, wireless relay node, wireless backhaul node, transmission point (TP) or transmission reception point (TRP), etc. The first network device 201 / second network device 202 can also be a gNB or TRP or TP in a 5G system, or one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system. In addition, the first network device 201 / second network device 202 can also be a network node constituting a gNB or TP, such as a BBU, or a distributed unit (DU), etc. The first network device 201 / the second network device 202 may also be a network device in a 5.5G or 6G system.

[0145] In some deployments, the gNB may include a centralized unit (CU) and a DU. In addition, the gNB may also include an active antenna unit (AAU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC) layer, the media access control (MAC) layer, and the physical layer (PHY). The AAU implements some physical layer processing functions, RF processing, and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, in this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU, or by the DU and the AAU. It can be understood that the access network device can be a device including one or more of a CU node, a DU node, and an AAU node.

[0146] Optionally, the first network device 201 / the second network device 202 and the terminal device 203 in the embodiment of the present application can communicate through a licensed spectrum, can communicate through an unlicensed spectrum, or can communicate through both a licensed spectrum and an unlicensed spectrum. The first network device 201 and the terminal device 203 can communicate through a higher spectrum (e.g., 4.9 GHz), and the second network device 202 and the terminal device 203 can communicate through a lower spectrum (e.g., 2.5 GHz).

[0147] Optionally, the first network device 201, the second network device 202, and the terminal device 203 in the embodiment of the present application can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; can also be deployed on airplanes, balloons, and artificial satellites in the air. The embodiment of the embodiment of the present application does not limit the application scenarios of the first network device 201, the second network device 202, and the terminal device 203.

[0148] Optionally, in an embodiment of the present application, the first network device 201, the second network device 202 and the terminal device 203 include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU) and a memory (also called main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, such as Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems or windows operating systems. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the present application do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application. As long as it is possible to communicate according to the method provided by the embodiments of the present application by running a program that records the code of the method provided by the embodiments of the present application, for example, the execution subject of the method provided by the embodiments of the present application may be the first network device 201, the second network device 202 and the terminal device 203, or it may be a functional module in the first network device 201, the second network device 202 and the terminal device 203 that can call and execute the program.

[0149] In other words, the related functions of the first network device 201, the second network device 202, and the terminal device 203 in the embodiment of the present application can be implemented by one device, or by multiple devices together, or by at least one functional module in one device, and the embodiment of the present application does not specifically limit this. It is understandable that the above functions can be network elements in hardware devices, or software functions running on dedicated hardware, or a combination of hardware and software, or virtualization functions instantiated on a platform (e.g., a cloud platform).

[0150] For example, the related functions of the first network device 201, the second network device 202 and the terminal device 203 in the embodiment of the present application can be Figure 3 The communication device 300 is used to implement the above. Figure 3 FIG. 3 is a schematic diagram of the structure of a communication device 300 provided in an embodiment of the present application. The communication device 300 includes at least one processor 301, a communication line 302, and at least one communication interface ( Figure 3 The example in which the communication interface 304 and a processor 301 are included is merely exemplary), and a memory 303 may also be included optionally.

[0151] The processor 301 may be a central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or at least one integrated circuit for controlling the execution of the program of the embodiment of the present application.

[0152] The communication line 302 may include a path for connecting different components.

[0153] The communication interface 304 may be a transceiver module for communicating with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), etc. For example, the transceiver module may be a device such as a transceiver or a transceiver. Optionally, the communication interface 304 may also be a transceiver circuit located in the processor 301 to implement signal input and signal output of the processor.

[0154] The memory 303 may be a device with a storage function. For example, it may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory may exist independently and be connected to the processor via a communication line 302. The memory may also be integrated with the processor.

[0155] The memory 303 is used to store computer-executable instructions for executing the solution of the embodiment of the present application, and the execution is controlled by the processor 301. The processor 301 is used to execute the computer-executable instructions stored in the memory 303, thereby realizing the communication method provided in the embodiment of the present application.

[0156] Alternatively, the processor 301 may execute processing-related functions in the communication method provided in the embodiment of the present application, and the communication interface 304 may be responsible for communicating with other devices or communication networks, which is not specifically limited in the embodiment of the present application.

[0157] The computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which is not specifically limited in the embodiments of the present application.

[0158] In a specific implementation, as an embodiment, the processor 301 may include at least one CPU, for example Figure 3 CPU0 and CPU1 in.

[0159] In a specific implementation, as an embodiment, the communication device 300 may include multiple processors, such as Figure 3 301 and processor 307 in the embodiment of the present invention. Each of these processors may be a single-CPU processor or a multi-CPU processor. The processor herein may refer to at least one device, circuit, and / or processing core for processing data (e.g., computer program instructions).

[0160] In a specific implementation, as an embodiment, the communication apparatus 300 may further include an output device 305 and an input device 306. The output device 305 communicates with the processor 301 and may display information in a variety of ways.

[0161] The communication device 300 can be a general device or a dedicated device. For example, the communication device 300 can be a desktop computer, a portable computer, a network server, a personal digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal, an embedded device, or a computer with Figure 3 The embodiment of the present application does not limit the type of the communication device 300.

[0162] The following will be combined Figures 1 to 10 The communication method provided in the embodiment of the present application is described in detail.

[0163] It should be noted that the message names between network elements or the names of parameters in the message in the embodiment of the present application are only examples, and other names may be used in the specific implementation. The embodiment of the present application does not make any specific limitations on this.

[0164] The embodiments of the present application can be used alone or in combination.

[0165] The following embodiments of the present application take the higher frequency band / lower frequency band as an example. The higher frequency band can be replaced by the second frequency band. The lower frequency band can be replaced by the first frequency band. The first frequency band can be a licensed frequency band; the second frequency band can be an unlicensed frequency band, or the first frequency band can be a low frequency spectrum; the second frequency band can be a high frequency spectrum.

[0166] In the embodiments of the present application, in some embodiments, when the second network device configures the resources for the uplink measurement signal to the first network device / terminal device, it may simultaneously indicate that the resources are used for random access, or it may indicate that the resources are used for random access at the same time; or, when the second network device configures the resources for random access to the first network device / terminal device, it may simultaneously indicate that the resources are used for uplink measurement, or it may indicate that the resources are used for uplink measurement at the same time.

[0167] In an embodiment of the present application, optionally, when the second network device configures the resources of the uplink measurement signal to the first network device / terminal device, it indicates that the resources are used for both obtaining timing advance (TA) and uplink measurement. Thus, the first network device / terminal device can identify it. Here, timing advance can also be referred to as time advance, time advance value or timing advance. Optionally, when the terminal device periodically or is triggered to send the uplink measurement signal, the first network device can execute accordingly. Of course, the resources of the uplink measurement signal can also be determined by the first network device and exchanged to the second network device.

[0168] As an embodiment, when the second network device configures the resource identifier of the uplink measurement signal to the first network device / terminal device, it indicates that the resource is used for both obtaining TA and uplink measurement. As another embodiment, when the second network device configures the resource of the uplink measurement signal to the first network device / terminal device, it adds an indication information for identifying that the resource of the uplink measurement signal is used for both obtaining TA and uplink measurement; or, it adds an indication information for identifying whether the resource of the uplink measurement signal is used for both obtaining TA and uplink measurement. Optionally, the indication information is 1 bit.

[0169] In an embodiment of the present application, the resource of the uplink measurement signal can be configured for different carrier identifiers to which the second frequency band belongs, or can be configured for the same configuration to indicate TDD transmission patterns on different carriers. The symbol position of the uplink measurement signal can be a continuous symbol in a time slot, or a non-continuous symbol. It can occupy any OFDM position in a time slot.

[0170] In the embodiments of the present application, in some other embodiments, when the second network device configures resources for random access to the first network device / terminal device, it may indicate that the resources are used for uplink measurement.

[0171] In an embodiment of the present application, optionally, when the second network device configures the resources of the uplink measurement signal to the first network device / terminal device, it indicates that the resources are used for uplink measurement. Thus, the first network device / terminal device can identify it. Optionally, when the terminal device periodically or is triggered to send the uplink measurement signal, the first network device can execute accordingly. Of course, the resources of the uplink measurement signal can be determined by the second network device; or it can be determined by the first network device and exchanged to the second network device.

[0172] As an embodiment, when the second network device configures the resource identifier of the uplink measurement signal to the first network device / terminal device, it indicates that the resource is used for uplink measurement. As another embodiment, when the second network device configures the resource of the uplink measurement signal to the first network device / terminal device, it adds an indication information for identifying that the resource of the uplink measurement signal is used for uplink measurement; or, adds an indication information for identifying whether the resource of the uplink measurement signal is used for uplink measurement. Optionally, the indication information is 1 bit.

[0173] In an embodiment of the present application, the resource of the uplink measurement signal can be configured for different carrier identifiers to which the second frequency band belongs, or can be configured for the same configuration to indicate TDD transmission patterns on different carriers. The symbol position of the uplink measurement signal can be a continuous symbol in a time slot, or a non-continuous symbol. It can occupy any OFDM position in a time slot.

[0174] In the embodiment of the present application, the first feedback information may also be referred to as the first response information or the first information, which is only used as a name and does not constitute a limitation.

[0175] In the embodiment of the present application, the system information is a remaining system information block (RMSB), or in other words, the system information is an on demand based SIB.

[0176] See also Figure 4 , is a flow chart of a communication method provided in an embodiment of the present application. Exemplarily, the method may include:

[0177] S101. A terminal device sends a first uplink signal to a first network device on at least one first carrier.

[0178] Correspondingly, the first network device receives the first uplink signal on at least one first carrier. The receiving in the embodiment of the present application can also be understood as detecting, probing, measuring or monitoring. For example, receiving the first uplink signal can be understood as detecting or measuring the first uplink signal.

[0179] As mentioned above, when using a higher frequency band to implement SUL, the reliability of communication cannot be determined, and a new access mechanism needs to be designed. In addition, a higher frequency band such as the 4.9 GHz band includes at least one carrier, which is generally a full uplink carrier or an uplink-dominated carrier, and this needs to be taken into account when designing a new access mechanism.

[0180] In the embodiment of the present application, a fully uplink carrier is a carrier in which all time slots are uplink time slots in the uplink and downlink time slot ratio. An uplink-dominated carrier is a carrier in which uplink time slots account for the majority and downlink time slots account for the minority in the uplink and downlink time slot ratio. As an example, the uplink and downlink time slot ratio of the uplink-dominated carrier is as follows: every X time slots are regarded as a time slot configuration cycle, in which there are Y downlink slots, and the remaining XY time slots are all uplink time slots. Among them, X can be a positive integer larger than Y, for example, 20, 30, 40 or 60. Correspondingly, Y is a positive integer smaller than X, for example, 1, 2 or 3. For example, in an uplink-dominated carrier, the uplink and downlink time slots can be configured as 1 downlink time slot and X-1 uplink time slots in sequence, or configured as X-1 uplink time slots and 1 downlink time slot in sequence. Among them, as long as a time slot contains a downlink symbol, the time slot can be called a downlink time slot. That is, the downlink time slot can be understood as a time slot containing downlink symbols. The downlink symbols can be continuous or non-continuous. Optionally, the frequency band or partial frequency band (band width partial, BWP) or physical resource block (physical resource block, PRB) where the downlink symbols are located is configurable.

[0181] In the present application, any "configurable" or "configurable" can be understood as being configured by the first network device or the second network device through RRC signaling, and can also be understood as being configured by the first network device or the second network device through MAC layer signaling or physical layer signaling. For example, the first network device or the second network device can configure the number of downlink symbols included in the downlink time slot through RRC signaling.

[0182] Therefore, in this embodiment, the terminal device sends a first uplink signal to the first network device on at least one carrier in the higher frequency band. The first network device may be as follows: Figure 1The micro base station shown is located in the above-mentioned higher frequency band. The first uplink signal is used for uplink measurement, and the first uplink signal can be a sounding reference signal (SRS), a preamble code (preamble code), a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS) or any defined sequence (sequence). Optionally, in an embodiment of the present application, any defined sequence can be a ZC sequence or a C sequence. Taking the first uplink signal as SRS as an example, the SRS is not used for scheduling but for uplink measurement, then the SRS can also be called an access sounding reference signal (access-SRS) or a radio resource management sounding reference signal (radio resource management-sounding reference signal, RRM-SRS).

[0183] In the embodiments of the present application, the term "for scheduling" refers to the existing uplink channel measurement or channel status acquisition. The term "for uplink measurement" refers to the term used to determine whether a carrier is activated or whether a carrier is selected for data transmission. Uplink measurement can also be understood as uplink detection. The preamble code can also be referred to as a preamble sequence or a preamble signal.

[0184] The terminal device sends the first uplink signal to the first network device on at least one carrier, which may be that the terminal device sends the first uplink signal to the first network device on each carrier within a set time. The first network device receives the first uplink signal sent by the terminal device on each carrier.

[0185] In the embodiment of the present application, setting can be understood as preset. Preset is predefined or preconfigured. Preconfiguration is configured by the first network device / the second network device through RRC signaling or MAC signaling.

[0186] In the embodiment of the present application, any of the above configurations by the second network device can realize the configuration information indication to the terminal device under the premise that there is only an uplink time slot between the first network device and the terminal device. Any of the above configurations by the first network device can realize the configuration information indication to the terminal device under the premise that there is a downlink time slot or downlink symbol transmission between the first network device and the terminal device.

[0187] At least one carrier satisfying a set condition may belong to a carrier group. The set condition may be, for example, that the carriers are adjacent in position, or that the carriers have common attribute information, etc. In the embodiment of the present application, the carrier group may also be referred to as a carrier set.

[0188] S102: A first network device determines a signal strength of a first uplink signal on at least one first carrier.

[0189] The first network device determines the signal strength of the first uplink signal on at least one first carrier, and can measure the first uplink signal received on at least one first carrier for the first network device to obtain the signal strength of the first uplink signal on at least one first carrier; or, the first network device obtains the signal strength of the first uplink signal on at least one first carrier according to the first uplink signal received on at least one first carrier. Here, "obtain" or "obtain" can be understood as directly determining or as being derived.

[0190] In the embodiment of the present application, the signal strength of the first uplink signal may be the signal strength of layer 1, or the signal strength obtained by filtering layer 3.

[0191] Specifically, after receiving the first uplink signal on multiple carriers, the first network device measures the first uplink signal received on the corresponding carriers respectively to obtain the signal strength of the first uplink signal on the carrier. The signal strength of the first uplink signal can be measured using existing technologies. The signal strength can be expressed as one or more of reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and reference signal strength indicator (RSSI).

[0192] Optionally, after receiving the first uplink signal on each carrier, the first network device measures the first uplink signal received on each carrier respectively to obtain the signal strength of the first uplink signal on each carrier. The signal strength of the first uplink signal can be measured using existing technology. The signal strength can be expressed as one or more of reference signal receiving power (RSRP), reference signal receiving quality (RSRQ), and reference signal strength indicator (RSSI).

[0193] S103: The first network device determines an activated carrier (active carrier) among the at least one first carrier according to the signal strength of the first uplink signal on the at least one first carrier.

[0194] The first network device can determine whether the signal strength of the first uplink signal on the corresponding carrier is greater than or equal to the set value based on the signal strength of the first uplink signal on at least one carrier measured. If the signal strength of the first uplink signal on the first carrier is greater than or equal to the set value, the first carrier is determined to be an activated carrier. The activated carrier can also be called a service carrier or a working carrier, which means that the carrier can be activated for terminal equipment to access or transmit uplink information. The activated carrier can also be called a second carrier. The activated carrier is at least one carrier whose signal strength is greater than or equal to the set value among the at least one first carrier mentioned above. In the embodiment of the present application, the activated carrier is only used as an example and is not limited by the name. In the embodiment of the present application, access can be understood as access for uplink capacity expansion, or access for super uplink. In the embodiment of the present application, the service carrier refers to a carrier that can serve the terminal device, and the working carrier refers to a carrier on which the terminal device can perform data transmission on the carrier. Among them, data transmission is uplink data transmission, or mainly uplink data transmission.

[0195] Optionally, the first network device compares whether the signal strength of the first uplink signal on each carrier is greater than or equal to a set value based on the measured signal strength of the first uplink signal on each carrier. If the signal strength of the first uplink signal on the first carrier is greater than or equal to the set value, the first carrier can be determined as an activated carrier.

[0196] Optionally, when the at least one first carrier is fully uplink, the following steps S104 and S105 may be performed.

[0197] S104. The first network device sends first indication information to the second network device, where the first indication information includes information about an activated carrier in at least one first carrier.

[0198] Correspondingly, the second network device receives the first indication information.

[0199] The first indication information may also include second identification information corresponding to the terminal device.

[0200] In an embodiment of the present application, the second identification information includes at least one of the following: a sequence identifier corresponding to the uplink signal, and a resource identifier corresponding to the uplink signal. The sequence identifier is an SRS sequence, a preamble sequence, or any newly defined sequence (such as a ZC sequence, an m sequence, etc.) used to identify the UE. The resource identifier corresponding to the uplink signal is a resource index of the uplink signal or a resource index of a set to which the uplink signal belongs.

[0201] In the case where the at least one first carrier is fully uplinked, after the first network device determines to activate the carrier, it sends first indication information to the second network device, where the first indication information includes information about the activated carrier in the at least one first carrier. The second network device may be Figure 1 There is a downlink time slot between the second network device and the terminal device, and downlink information can be sent to the terminal device. Therefore, the second network device can send the first feedback information to the terminal device according to the first indication information.

[0202] S105. The second network device sends first feedback information to the terminal device.

[0203] Correspondingly, the terminal device receives the first feedback information.

[0204] The first feedback information includes information about activated carriers in at least one first carrier. The information about activated carriers can be understood as information used to indicate activated carriers in at least one first carrier, where the indication can be a direct indication or an implicit indication, and any information that enables the terminal device to know the activated carriers in at least the first carrier can be understood as information about activated carriers.

[0205] In the case where at least one of the first carriers is fully uplink, after receiving the first indication information sent by the first network device, the second network device sends first feedback information to the terminal device. After receiving the first feedback information, the terminal device can learn information about the activated carrier that can be used for access or uplink data transmission.

[0206] In the embodiment of the present application, the first indication information is information transmitted on the interface between network devices, and the first feedback information is information sent by the network device to the terminal device. The first feedback information is determined according to the first indication information. The first indication information and the first feedback information can be the same information or different information. The content contained in the first indication information and the first feedback information can be completely the same or partially the same. When the first indication information and the first feedback information are completely the same, the second network device sending the first feedback information can be understood as forwarding the first indication information.

[0207] Optionally, after the terminal device receives the first feedback information, the following step S106 may be performed (indicated by a dotted line in the figure).

[0208] S106. The terminal device sends a preamble code to the first network device on at least one activated carrier.

[0209] Optionally, when the at least one first carrier is fully uplink, the following steps S107 and S08 may be performed (indicated by dotted lines in the figure).

[0210] S107. The first network device sends third indication information to the second network device, where the third indication information includes a TA corresponding to at least one activated carrier.

[0211] S108. The second network device sends second feedback information to the terminal device.

[0212] Correspondingly, the terminal device receives second feedback information corresponding to at least one activated carrier.

[0213] The second feedback information includes a TA corresponding to at least one activated carrier. Optionally, the second feedback information may be a random access response (RAR) message.

[0214] According to a communication method provided by an embodiment of the present application, by determining the signal strength of a first uplink signal sent by a terminal device on at least one first carrier, information about an activated carrier in at least one first carrier can be determined more accurately, thereby improving the reliability of communication on the activated carrier. Additionally, after determining the activated carrier, the TA value corresponding to the activated carrier can be obtained through random access.

[0215] In another embodiment, the at least one first carrier may not be all uplink. Figure 5 As shown, it is another flow chart of the communication method provided in the embodiment of the present application. Exemplarily, the method may include:

[0216] S101'. A terminal device sends a first uplink signal to a first network device on at least one first carrier.

[0217] The specific implementation of this step can be found in Figure 4 Step S101 of the illustrated embodiment.

[0218] S102': The first network device determines a signal strength of a first uplink signal on at least one first carrier.

[0219] The specific implementation of this step can be found in Figure 4 Step S102 of the illustrated embodiment.

[0220] S103': The first network device determines an activated carrier among the at least one first carrier according to the signal strength of the first uplink signal on the at least one first carrier.

[0221] The specific implementation of this step can be found in Figure 4 Step S103 of the illustrated embodiment.

[0222] S104': The first network device sends first feedback information to the terminal device.

[0223] Correspondingly, the terminal device receives the first feedback information.

[0224] The first feedback information includes information of an activated carrier in the at least one first carrier.

[0225] and Figure 4 The difference from the illustrated embodiment is that, in this embodiment, the at least one first carrier is uplink-dominated, that is, the at least one first carrier includes a small number of downlink time slots, and the first network device can send the first feedback information to the terminal device in the first time slot. The first time slot is a downlink time slot configured by the first network device for the terminal device.

[0226] Optionally, after the terminal device receives the first feedback information, the following step S105' may be performed (indicated by dotted lines in the figure).

[0227] S105': The terminal device sends a preamble code to the first network device on at least one activated carrier.

[0228] Optionally, when the at least one first carrier is not fully uplink, the following step S106' may be performed (indicated by a dotted line in the figure).

[0229] S106': The first network device sends second feedback information to the terminal device.

[0230] Correspondingly, the terminal device receives second feedback information corresponding to at least one activated carrier.

[0231] and Figure 4 The difference between the illustrated embodiment is that the first network device can send the second feedback information through a small number of downlink time slots. The second feedback information includes a TA corresponding to at least one activated carrier. Optionally, the second feedback information can be a random access response message.

[0232] In this embodiment, the first network device may use a small number of downlink time slots to send the second feedback information, so that the terminal device may obtain the TA value corresponding to the activated carrier through random access according to the second feedback information.

[0233] In the LTE communication process, the terminal device can obtain the corresponding TA value through random access, or on the carrier with downlink transmission, the terminal devices in a time advance group (TAG) can obtain the corresponding TA value through radio resource control (RRC) signaling. The random access process is performed by the terminal device sending a preamble on the physical random access channel (PRACH).

[0234] The following embodiments consider jointly sending an uplink signal for acquiring the TA and a signal for uplink measurement to achieve efficient use of resources and save uplink signaling overhead.

[0235] For details, please see Figure 6 , which is another flow chart of the communication method provided in an embodiment of the present application.

[0236] The terminal device sends a first uplink signal to the first network device on at least one first carrier, and the first uplink signal is used to obtain TA and uplink measurement. The first uplink signal includes a sounding reference signal (SRS), a preamble code, a demodulation reference signal (DMRS), a CSI-RS or any defined sequence. Optionally, it is used to obtain TA, which can be understood as being used to initiate random access. The following takes the first uplink signal as a preamble as an example.

[0237] Exemplarily, the method may include:

[0238] S201. A terminal device sends a first preamble sequence to a first network device on at least one first carrier.

[0239] Accordingly, the first network device receives a first preamble sequence on at least one first carrier.

[0240] The terminal device sends a first preamble sequence to the first network device on at least one first carrier, where the first preamble sequence is used to obtain TA and uplink measurement.

[0241] Specifically, when the second network device configures the resources for the uplink measurement signal to the first network device / terminal device, it can also indicate that the resources are used for random access, that is, it can indicate that the resources can be used for random access in addition to uplink measurement; or, when the second network device configures the resources for random access to the first network device / terminal device, it can also indicate that the resources are used for uplink measurement, that is, it can indicate that the resources can be used for uplink measurement in addition to random access.

[0242] In an embodiment of the present application, optionally, when the second network device configures the resources of the uplink measurement signal to the first network device / terminal device, it indicates that the resources are used for both obtaining TA and uplink measurement. Thus, the first network device / terminal device can identify it. Optionally, when the terminal device periodically or is triggered to send the uplink measurement signal, the first network device can execute accordingly. Of course, the resources of the uplink measurement signal can also be determined by the first network device and exchanged to the second network device.

[0243] As an embodiment, when the second network device configures the resource identifier of the uplink measurement signal to the first network device / terminal device, it indicates that the resource is used for both obtaining TA and uplink measurement. As another embodiment, when the second network device configures the resource of the uplink measurement signal to the first network device / terminal device, it adds an indication information for identifying that the resource of the uplink measurement signal is used for both obtaining TA and uplink measurement; or, it adds an indication information for identifying whether the resource of the uplink measurement signal is used for both obtaining TA and uplink measurement. Optionally, the indication information is 1 bit.

[0244] In an embodiment of the present application, the resource of the uplink measurement signal can be configured for different carrier identifiers to which the second frequency band belongs, or can be configured for the same configuration to indicate TDD transmission patterns on different carriers. The symbol position of the uplink measurement signal can be a continuous symbol in a time slot, or a non-continuous symbol. It can occupy any OFDM position in a time slot.

[0245] S202: A first network device determines a signal strength of a first preamble sequence on at least one first carrier.

[0246] and Figure 4 The step S102 shown is the same, the first network device measures the first preamble sequence received on at least one first carrier to obtain the signal strength of the first preamble sequence on at least one first carrier.

[0247] S203: The first network device determines an activated carrier among the at least one first carrier according to the signal strength of the first preamble sequence on the at least one first carrier. The first network device determines a timing advance value corresponding to the activated carrier.

[0248] The above determination of the activated carrier and the determination of the time advance value are not in any particular order. The TA may be determined first and then the activated carrier; the activated carrier may be determined first and then the TA; or the activated carrier and the TA may be determined simultaneously.

[0249] and Figure 4 The same as step S103 shown, the first network device determines the activated carrier according to the signal strength of the first leading sequence on at least one first carrier. In addition, the first network device can also determine the TA value corresponding to the activated carrier. Among them, one activated carrier can correspond to one TA value, that is, the activated carrier and the TA value correspond one to one; or at least one activated carrier can correspond to one TA value; or at least one activated carrier is divided into a carrier group, and one carrier group corresponds to one TA value, that is, the activated carriers in the carrier group have a common TA value. The correspondence between the carrier group and the activated carrier can be pre-configured or predefined by RRC signaling, or it can be determined according to the correlation in TA acquisition. That is, when the TAs of multiple activated carriers are correlated, similar or approximate, the multiple activated carriers are determined as a carrier group.

[0250] S204. The first network device sends fourth indication information to the second network device, where the fourth indication information includes information of an activated carrier in at least one first carrier and a timing advance value corresponding to the activated carrier.

[0251] Correspondingly, the second network device receives the fourth indication information.

[0252] In the case where the at least one first carrier is fully uplink, the first network device sends fourth indication information to the second network device, and the fourth indication information is used to respond to the random access and uplink measurement initiated above. The fourth indication information includes information of an activated carrier in the at least one first carrier and a TA value corresponding to the activated carrier.

[0253] For the case where the at least one first carrier is uplink-dominated, the first network device may send a first feedback message to the terminal device in a first time slot. The first time slot is a downlink time slot configured by the first network device for the terminal device. As an example, the first feedback information is a random access response (RAR) message.

[0254] In addition, the fourth indication information may also include the first identification information and / or second identification information corresponding to the terminal device.

[0255] In the embodiment of the present application, the first identification information includes at least one of the following: a cell-radio network temporary identifier (C-RNTI), and a sequence identifier corresponding to the uplink signal. The C-RNTI is an identifier assigned to the terminal device by the second network device.

[0256] In an embodiment of the present application, the second identification information includes at least one of the following: a sequence identifier corresponding to the uplink signal, and a resource identifier corresponding to the uplink signal. The sequence identifier is an SRS sequence, a preamble sequence, or any newly defined sequence (such as a ZC sequence, an m sequence, etc.) used to identify the UE. The resource identifier corresponding to the uplink signal is a resource index of the uplink signal or a resource index of a set where the uplink signal is located.

[0257] In the embodiments of the present application, the sequence includes a ZC sequence, or an m sequence, or any combination sequence of a ZC and an m sequence. Similarly, any newly defined sequence can also be understood as any newly defined ZC sequence, or an m sequence, or any combination sequence of a ZC and an m sequence.

[0258] S205. The second network device sends first feedback information to the terminal device.

[0259] Correspondingly, the terminal device receives the first feedback information.

[0260] The first feedback information includes information of an activated carrier in at least one first carrier and a timing advance value corresponding to the activated carrier.

[0261] The first feedback information may also include first identification information and / or second identification information corresponding to the terminal device.

[0262] The terminal device may use the first identifier for cyclic redundancy check (CRC) scrambling of uplink transmission on any activated carrier acquired. Optionally, the information contained in the first feedback information may be sent by the second network device to the first network device via the X2 interface or the backhaul link between network devices after the first network device determines the activated carrier for the terminal device. That is, the first feedback information is determined based on the fourth indication information.

[0263] Optionally, for the case where at least one of the above-mentioned first carriers is all uplink, the first network device may send a fourth indication information to the second network device, and then the second network device broadcasts the system information (system information, SI), and the terminal device receives the SI. Among them, the SI includes a master information block (master information block, MIB) and multiple system information blocks (system information blocks, SIBs). In the embodiment of the present application, the information of the activated carrier in at least one first carrier and the TA value corresponding to the activated carrier are mainly carried by SIBs. In addition, the SIBs may also include the corresponding first identification information and / or second identification information of the terminal device. Optionally, for the case where at least one of the above-mentioned first carriers is dominated by the uplink, the first network device may broadcast the SIBs, and the terminal device may receive the SIBs.

[0264] In an embodiment of the present application, optionally, the C-RNTI may be indicated by the second network device to the first network device via an inter-network interface. The C-RNTI indicated to the first network device may be used by the first network device to schedule data transmission of the terminal device in a small number of downlink time slots. The data transmission is uplink data transmission.

[0265] The following description is made assuming that the first feedback information is a RAR message.

[0266] In the case where at least one of the first carriers is fully uplink, after receiving the fourth indication information from the first network device, the second network device sends a RAR message to the terminal device. After receiving the RAR message, the terminal device can obtain the information of the activated carrier therein, thereby determining the activated carrier for access and uplink information transmission; and can obtain the TA value corresponding to the activated carrier, so that according to the TA value, it can synchronize with the first network device on the corresponding activated carrier, thereby performing uplink communication with the first network device on the activated carrier.

[0267] In the case where the at least one first carrier is uplink-dominant, the terminal device receives a RAR message from the first network device.

[0268] It can be understood that the uplink measurement and random access joint process only needs to send the above-mentioned first preamble sequence and receive the RAR message, and does not need to additionally send message 3 and receive message 4.

[0269] According to a communication method provided in an embodiment of the present application, a time advance value for terminal device synchronization can be obtained by combining a random access process and an uplink signal measurement process, and information of an activated carrier in at least one first carrier can be determined more accurately based on the signal strength of a first preamble sequence, thereby improving the reliability of communication on the activated carrier and saving signaling overhead in the random access process and the uplink signal measurement process.

[0270] and Figure 6 The difference from the illustrated embodiment is that random access and uplink measurement may not be performed jointly, but random access is performed only when the first uplink signal is detected by the first network device and the corresponding activated carrier is determined.

[0271] In the embodiments of the present application, the conceptual explanation in any one embodiment may also be applicable to other embodiments.

[0272] Specifically, see Figure 7 , which is another flow chart of the communication method provided in an embodiment of the present application.

[0273] The terminal device sends a first uplink signal to the first network device on at least one first carrier, and the first uplink signal is used for uplink measurement. The first uplink signal includes a sounding reference signal (SRS), a preamble code, a demodulation reference signal (DMRS), a CSI-RS, or any defined sequence. The following takes the first uplink signal as SRS as an example.

[0274] Exemplarily, the method may include:

[0275] S301. A terminal device sends an SRS to a first network device on at least one first carrier.

[0276] Accordingly, the first network device receives the SRS on at least one first carrier.

[0277] In this embodiment, the SRS is only used for uplink measurement. Of course, the terminal device may also send other uplink measurement signals, such as a preamble, a DMRS or a newly defined sequence.

[0278] S302: A first network device determines a signal strength of an SRS on at least one first carrier.

[0279] The specific implementation of this step can be found in Figure 4 Step S102 of the embodiment shown, and Figure 6 Step S202 of the illustrated embodiment.

[0280] S303: The first network device determines an activated carrier in at least one first carrier according to a signal strength of an SRS on at least one first carrier.

[0281] In this step, the activated carrier is determined only according to the signal strength of the SRS on at least one first carrier. For specific implementation, please refer to Figure 4 Step S103 of the illustrated embodiment.

[0282] S304. The first network device sends fifth indication information to the second network device, where the fifth indication information includes information about an activated carrier in at least one first carrier.

[0283] Correspondingly, the second network device detects the fifth indication information.

[0284] In this step, the fifth indication information includes information about the activated carrier in at least one first carrier. The fifth indication information does not include TA. The fifth indication information also includes the second identification information corresponding to the terminal device. The specific information of the first identification information and / or the second identification information is as described above and will not be repeated here. For specific implementation, please refer to Figure 4 Step S104 of the illustrated embodiment.

[0285] S305. The second network device sends first feedback information to the terminal device.

[0286] Correspondingly, the terminal device receives the first feedback information. The first feedback information includes information of an activated carrier in at least one first carrier. The first feedback information is determined according to the fifth indication information. Among them, the fifth indication information is information transmitted on the interface between network devices, and the first feedback information is information sent by the network device to the terminal device. The first feedback information is determined according to the fifth indication information. The fifth indication information and the first feedback information can be the same information or different information. The content contained in the fifth indication information and the first feedback information can be exactly the same or partially the same. When the fifth indication information is exactly the same as the first feedback information, the second network device sends the first feedback information, which can be understood as forwarding the fifth indication information.

[0287] The specific implementation of this step can be found in Figure 4 Step S105 of the illustrated embodiment.

[0288] S306. The terminal device sends a first preamble sequence to the first network device on the activated carrier.

[0289] Accordingly, the first network device detects the first preamble sequence.

[0290] After the terminal device obtains the activated carrier determined by the first network device, the terminal device sends a first preamble sequence to the first network device on the activated carrier. The first preamble sequence is used to initiate random access and obtain a TA value corresponding to the activated carrier.

[0291] If there are multiple activated carriers determined by the first network device, the terminal device can send the first preamble sequence on the multiple activated carriers respectively to obtain the TA value corresponding to each activated carrier.

[0292] S307. The first network device sends sixth indication information to the second network device, where the sixth indication information includes a TA value corresponding to the activated carrier.

[0293] Correspondingly, the second network device detects the sixth indication information.

[0294] After receiving the first preamble sequence on the activated carrier, the first network device determines a TA value corresponding to the activated carrier.

[0295] In the case where the at least one first carrier is fully uplinked, the first network device sends sixth indication information to the second network device, where the sixth indication information is used to indicate information for responding to the random access initiated. Figure 6 The fourth indication information in the illustrated embodiment includes that the TA value of at least one activated carrier is different. In the present embodiment, the sixth indication information includes the TA value corresponding to each activated carrier, that is, the TA value is for the activated carrier, and the terminal device uses the TA value to communicate on the activated carrier, thereby achieving accurate synchronization with the first network device.

[0296] The sixth indication information also includes the first identification information. The specific content and beneficial effects of the first identification information are as described above and will not be repeated here.

[0297] S308. The second network device sends second feedback information to the terminal device.

[0298] Correspondingly, the terminal device receives the second feedback information. The second feedback information is determined according to the sixth indication information. For example, the second feedback information is RAR.

[0299] The second feedback information includes a TA value corresponding to at least one activated carrier.

[0300] The second feedback information also includes first identification information.

[0301] In the case where at least one of the first carriers is fully uplinked, after receiving the sixth indication information from the first network device, the second network device sends a RAR message to the terminal device. After receiving the RAR message, the terminal device can obtain the TA value corresponding to the activated carrier, so that it can synchronize with the first network device on the corresponding activated carrier according to the TA value, and thus perform uplink communication with the first network device on the activated carrier.

[0302] According to a communication method provided by an embodiment of the present application, by determining the signal strength of a first uplink signal sent by a terminal device on at least one first carrier, an activated carrier of at least one first carrier can be determined more accurately, thereby improving the reliability of communication on the activated carrier; then, random access is performed on the determined activated carrier, and a TA value for the activated carrier can be obtained, so that the terminal device uses the TA value to communicate on the activated carrier, thereby achieving accurate synchronization with the first network device and improving the reliability of communication.

[0303] and Figure 6 , Figure 7 The difference is that random access may be performed on one carrier first, and then uplink measurement may be performed on another carrier based on an approximate TA value obtained through random access.

[0304] For details, please see Figure 8 , is another flow chart of the communication method provided in the embodiment of the present application. Exemplarily, the method may include:

[0305] S401. A terminal device sends a first preamble sequence to a first network device on a second carrier.

[0306] Accordingly, the first network device receives the first preamble sequence.

[0307] In this embodiment, the first preamble sequence is used for random access. The second carrier is different from the first carrier for sending the uplink measurement signal.

[0308] S402. The first network device sends seventh indication information to the second network device, where the seventh indication information includes TA1 corresponding to the second carrier.

[0309] After receiving the first preamble sequence, the first network device determines TA1, which corresponds to the second carrier.

[0310] In the case where the at least one first carrier is fully uplink, after determining TA1, the first network device sends seventh indication information to the second network device, where the seventh indication information includes TA1 corresponding to the second carrier.

[0311] S403: The second network device sends third feedback information to the terminal device.

[0312] The third feedback information includes TA1 corresponding to the second carrier.

[0313] After receiving the seventh indication information sent by the first network device, the second network device sends the third feedback information to the terminal device. For example, the third feedback information is RAR. The third feedback information is determined based on the seventh indication information. The seventh indication information and the third feedback information can be the same information or different information. The content contained in the seventh indication information and the third feedback information can be completely the same or partially the same. When the seventh indication information is completely the same as the third feedback information, the second network device sends the third feedback information, which can be understood as forwarding the seventh indication information.

[0314] S404. The terminal device sends a first uplink signal to the first network device on at least one first carrier according to TA1.

[0315] Correspondingly, the first network device detects the first uplink signal.

[0316] After receiving the third feedback information, the terminal device obtains TA1, which can be used as the initial TA value for uplink transmission. Therefore, the terminal device sends a first uplink signal to the first network device on at least one first carrier according to the TA1, and the first uplink signal is used for uplink measurement. Of course, the terminal device can send other uplink measurement signals to the first network device on at least one first carrier, such as SRS, DMRS or any newly defined sequence.

[0317] S405: The first network device determines a signal strength of a first uplink signal on at least one first carrier.

[0318] The specific implementation of this step can be found in Figure 4 Step S103 of the embodiment shown, or Figure 6 Step S202 of the embodiment shown, or Figure 7 Step S302 of the illustrated embodiment.

[0319] S406: The first network device determines an activated carrier among the at least one first carrier according to the signal strength of the first uplink signal of the at least one first carrier. Optionally, the first network device may also determine TA2 corresponding to the activated carrier.

[0320] The specific implementation of this step can be found in Figure 5 In step S203 of the illustrated embodiment, the first network device re-determines TA2 corresponding to the activated carrier according to the received first uplink signal. The accuracy of synchronization of the terminal device with the first network device using TA2 on the activated carrier is higher than the accuracy of synchronization with the first network device using TA1 on the activated carrier.

[0321] The TA2 may be an offset relative to TA1.

[0322] S407. The first network device sends eighth indication information to the second network device, where the eighth indication information includes information about an activated carrier in at least one first carrier. Optionally, the eighth indication information also includes TA2 corresponding to the activated carrier.

[0323] Correspondingly, the second network device receives the eighth indication information.

[0324] The specific implementation of this step can be found in Figure 5 Step S204 of the illustrated embodiment.

[0325] S408. The second network device sends first feedback information to the terminal device.

[0326] The first feedback information includes information of an activated carrier in the at least one first carrier.

[0327] Correspondingly, the terminal device receives the first feedback information. Optionally, the first feedback information is a RAR message. The first feedback information includes information about an activated carrier in at least one first carrier. Optionally, the first feedback information also includes TA2 corresponding to the activated carrier. The first feedback information is determined according to the eighth indication information. The eighth indication information and the first feedback information may be the same information or different information. The content contained in the eighth indication information and the first feedback information may be exactly the same or partially the same. When the eighth indication information is exactly the same as the first feedback information, the second network device sending the first feedback information can be understood as forwarding the eighth indication information.

[0328] The specific implementation of this step can be found in Figure 5 Step S205 of the illustrated embodiment.

[0329] According to a communication method provided in an embodiment of the present application, a terminal device can send an uplink measurement signal based on an initial TA value. After receiving the uplink measurement signal, the first access network device can determine the activated carrier and determine the TA value or TA offset value corresponding to the activated carrier, thereby improving synchronization accuracy and improving communication reliability.

[0330] See also Fig. 9 , is another flow chart of the communication method provided in the embodiment of the present application. Exemplarily, the method may include:

[0331] S501. A first network device sends a downlink reference signal on at least one first carrier.

[0332] Correspondingly, the terminal device detects a downlink reference signal from the first network device on at least one first carrier.

[0333] Exemplarily, the first network device sends a downlink reference signal to the terminal device, which is to periodically send the downlink reference signal to the terminal device.

[0334] In this embodiment, there are a small number of downlink time slots between the first network device and the terminal device. The first network device can periodically send a downlink reference signal to the terminal device through this small number of downlink time slots. The downlink reference signal can be a physical broadcast channel / synchronous signal block (PBCH / SS block) or a channel state information-reference signal (CSI-RS), etc. And the density of the downlink reference signal can be high-density. The density of the downlink reference signal can be configured by the second network device to the terminal device.

[0335] In the embodiment of the present application, a small number of downlink time slots may refer to that every X time slots are regarded as a time slot configuration cycle, in which there are Y downlink slots, and the remaining XY time slots are all uplink time slots. Among them, X can be a positive integer larger than Y, for example, 20, 30, 40 or 60. Correspondingly, Y is a positive integer smaller than X, for example, 1, 2 or 3. For example, when the uplink and downlink time slots are configured as 1 downlink time slot and X-1 uplink time slots cycle in sequence, or are configured as X-1 uplink time slots and 1 downlink time slot cycle in sequence, there are a small number of downlink time slots. Among them, as long as a time slot contains a downlink symbol, the time slot can be called a downlink time slot. That is, the downlink time slot can be understood as a time slot containing a downlink symbol. The downlink symbol can be continuous or discontinuous. The downlink symbol can be continuous or discontinuous. Optionally, the frequency band or partial frequency band (band width partial, BWP) or physical resource block (physical resource block, PRB) where the downlink symbol is located is configurable.

[0336] In the embodiments of the present application, any "configurable" or "configurable" can be understood as being configured by the first network device or the second network device through RRC signaling, or can be understood as being configured by the first network device or the second network device through MAC layer signaling or physical layer signaling. For example, the first network device or the second network device can configure the number of downlink symbols included in the downlink time slot through RRC signaling.

[0337] S502. The terminal device determines the signal strength of a downlink reference signal on at least one first carrier.

[0338] Specifically, after detecting the downlink reference signal, the terminal device performs signal measurement on the downlink reference signal to obtain signal strength. The signal strength may be one or more of the above RSRP, RSRQ or RSSI.

[0339] S503: When the signal strength of the downlink reference signal is greater than or equal to a first set value, the terminal device sends uplink information to the first network device on the unlicensed resources corresponding to the activated carrier, where the activated carrier is at least one of the at least one first carrier.

[0340] Correspondingly, when the signal strength of the downlink reference signal is greater than or equal to the first set value, the first network device detects uplink information from the terminal device on the unlicensed resources corresponding to the activated carrier.

[0341] When the signal strength of the downlink reference signal is greater than or equal to the first set value, according to the uplink and downlink consistency, the uplink channel performance is relatively good accordingly. At this time, the terminal device can perform uplink transmission on the unlicensed resources corresponding to the activated carrier. The activated carrier can be a service carrier or a working carrier determined according to the aforementioned embodiment. The activated carrier is at least one of the at least one first carrier. When the uplink channel performance is good, uplink transmission can improve the reliability of communication.

[0342] According to a communication method provided by an embodiment of the present application, by utilizing downlink reference signals detected in a small number of downlink time slots, when the signal strength of the downlink reference signals is relatively high, unlicensed resources are activated for uplink transmission, thereby improving the reliability of communication.

[0343] See also Fig.10 , is another flow chart of the communication method provided in the embodiment of the present application. Exemplarily, the method may include:

[0344] S601. A first network device sends a downlink reference signal on at least one first carrier.

[0345] Correspondingly, the terminal device detects the downlink reference signal on the at least one first carrier. Exemplarily, the first network device sends the downlink reference signal to the terminal device by periodically sending the downlink reference signal to the terminal device.

[0346] In this embodiment, there are a small number of downlink time slots between the first network device and the terminal device. How to understand a small number of downlink time slots has been described in the previous text and will not be repeated here. The first network device can periodically send a downlink reference signal to the terminal device through this small number of downlink time slots. The downlink reference signal can be a physical broadcast channel / synchronous signal block (physical broadcast channel / synchronous signal block, PBCH / SS block) or a channel state information-reference signal (channel state information-reference signal, CSI-RS), etc. And the density of the downlink reference signal can be high-density. The density of the downlink reference signal can be configured by the second network device to the terminal device.

[0347] Optionally, the time delay obtained by the terminal device when detecting the downlink reference signal can be used as an initial uplink TA reference value on the frequency band, thereby achieving initial alignment with the first network device.

[0348] S602. The terminal device determines the signal strength of a downlink reference signal on at least one first carrier.

[0349] Specifically, after detecting the downlink reference signal, the terminal device performs signal measurement on the downlink reference signal to obtain signal strength. The signal strength may be one or more of the above RSRP, RSRQ or RSSI.

[0350] S603: When the signal strength of the downlink reference signal is greater than or equal to a second set value, the terminal device sends a first uplink signal to the first network device on at least one first carrier.

[0351] Accordingly, the first network device receives the first uplink signal on at least one first carrier.

[0352] When the measured signal strength of the downlink reference signal is greater than or equal to the second set value, the terminal device is triggered to send the first uplink signal to the first network device on at least one first carrier. This can reduce the power consumption of the terminal device by redundant transmission when the terminal device is far away from the first network device. Optionally, the second set value can be greater than or equal to Fig. 9 The first setting value of the illustrated embodiment may not be limited thereto.

[0353] For the specific implementation of the terminal device sending the first uplink signal, please refer to Figure 4 Step S101 of the embodiment shown, or Figure 6 Step S201 etc. of the illustrated embodiment.

[0354] In addition, the time delay obtained by the terminal device when detecting the downlink reference signal can be used as the initial uplink TA reference value on the frequency band, thereby achieving initial alignment with the first network device. Therefore, in this step, no new random access is required on the frequency band (at least one first carrier), and the transmission of the first uplink signal can be based on the initial TA reference value. Further calibration of the TA value can refer to Figure 8 Therefore, rough timing can be obtained by referring to downlink synchronization, and TA adjustment can also be obtained through uplink signals, which can save random access signaling.

[0355] S604: The first network device determines a signal strength of a first uplink signal on at least one first carrier.

[0356] The specific implementation of this step can be found in Figure 4 Step S102 of the embodiment shown, or Figure 6 Step S202 etc. of the illustrated embodiment.

[0357] S605: The first network device determines an activated carrier among the at least one first carrier according to the signal strength of the first uplink signal on the at least one first carrier.

[0358] The specific implementation of this step can be found in Figure 4 Step S103 of the embodiment shown, or Figure 6 Step S203 etc. of the illustrated embodiment.

[0359] S606. The first network device sends first feedback information to the terminal device, where the first feedback information includes information about an activated carrier in at least one first carrier.

[0360] Correspondingly, the terminal device receives the first feedback information.

[0361] The first network device may send first feedback information to the terminal device in a few downlink time slots. The first feedback information includes information about an activated carrier in at least one carrier.

[0362] Optionally, in step S601, the terminal device obtains an initial UL TA reference value according to a downlink reference signal, and the first feedback information may further include an offset value of the UL TA. The offset value is used to adjust the UL TA.

[0363] Uplink communication generally uses grant free resources, and grant free resources corresponding to different carriers are pre-configured. Grant free resources, also known as configured grant resources, include two types: type 1 and type 2. Among them, type 1 grant free resources are semi-statically configured and do not require network equipment to send dynamic indication information for activation; type 2 grant free resources are semi-statically configured and require dynamic downlink control information (DCI) activation.

[0364] In one embodiment, the unlicensed resource is activated based on the activated carrier in the first feedback information, and accordingly, the unlicensed resource corresponding to the activated carrier is activated, and the unlicensed resource can be effectively used. Optionally, the first feedback information may also include second indication information, and the second indication information is used to indicate that the unlicensed resource corresponding to the activated carrier is activated, so that the terminal device can send uplink information to the first network device on the unlicensed resource corresponding to the activated carrier. Optionally, this situation uses type 1 unlicensed resources.

[0365] In one embodiment, the first network device is required to activate the unlicensed resource. Optionally, this situation uses type 2 unlicensed resources.

[0366] In one implementation, the first network device may adopt the newly defined DCI, that is, send the first DCI to the terminal device on the activated carrier, and the first DCI includes at least one field (segment), or at least one information block (block). At least one field or information block includes at least one of the following information: trigger indication information (trigger bit), activation carrier identity (carrier identity), and unlicensed resource set identity. The trigger indication information is used to activate the unlicensed resources corresponding to the activated carrier. After receiving the first DCI, the terminal device can use the unlicensed resources corresponding to the activated activation carrier to send a first uplink signal.

[0367] In another implementation, the first network device can reuse the existing form of DCI, that is, send a second DCI to the terminal device on the activated carrier, and the second DCI is used to trigger the transmission of the first uplink signal, that is, the second DCI is to trigger uplink measurement. After receiving the second DCI, the terminal device can use the type 2 unlicensed resources corresponding to the activated carrier to send the first uplink signal. Optionally, the second DCI can also include the above-mentioned trigger indication information, which is used to activate the unlicensed resources corresponding to the activated carrier.

[0368] According to a communication method provided by an embodiment of the present application, a terminal device can send an uplink measurement signal to a first network device when the signal strength of a downlink reference signal is strong, thereby avoiding redundant transmission when far away from the first network device and reducing power consumption of the terminal device.

[0369] It can be understood that in the above embodiments, the methods and / or steps implemented by the terminal device can also be implemented by components (such as chips or circuits) that can be used for the terminal device; the methods and / or steps implemented by the first network device can also be implemented by components (such as chips or circuits) that can be used for the first network device.

[0370] The above mainly introduces the scheme provided by the embodiment of the present application from the perspective of interaction between various network elements. Accordingly, the embodiment of the present application also provides a communication device, which is used to implement the above various methods. The communication device can be a terminal device in the above method embodiment, or a device including the above terminal device, or a component that can be used for the terminal device; or, the communication device can be a first network device in the above method embodiment, or a device including the above first network device, or a component that can be used for the first network device. It can be understood that in order to implement the above functions, the communication device includes a hardware structure and / or software module corresponding to each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiment disclosed in this article, the embodiment of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the embodiment of the present application.

[0371] The embodiment of the present application can divide the functional modules of the communication device according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0372] Fig.11 The structure diagram of a communication device 110 is shown. The communication device 110 includes a transceiver unit 1101 and a processing unit 1102. The transceiver unit 1101, which may also be called a transceiver unit, is used to implement a transceiver function, and may be, for example, a transceiver circuit, a transceiver, a transceiver or a communication interface.

[0373] Among them, the communication device 110 is Figures 4 to 8 Taking the terminal device in the method embodiment as an example, then:

[0374] The transceiver unit 1101 is used to send a first uplink signal to a first network device on at least one first carrier; and the transceiver unit 1101 is also used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

[0375] Optionally, the transceiver unit 1101 is further used to receive the first feedback information from a second network device; or, the transceiver unit 1101 is further used to receive the first feedback information from the first network device.

[0376] Optionally, the transceiver unit 1101 is further used to receive the first feedback information from the first network device through a first time slot, where the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0377] Among them, the communication device 110 is Figures 4 to 8 Taking the first network device or the second network device in the method embodiment as an example, then:

[0378] The processing unit 1102 is used to detect a first uplink signal on at least one first carrier; the processing unit 1102 is also used to determine the signal strength of the first uplink signal on the at least one first carrier; the processing unit 1102 is also used to determine an activated carrier in the at least one first carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the transceiver unit 1101 is used to send first feedback information, wherein the first feedback information includes information of the activated carrier in the at least one first carrier.

[0379] Optionally, the transceiver unit 1101 is further used to send first indication information to the second network device, where the first indication information includes information of an activated carrier in the at least one first carrier; or, the transceiver unit 1101 is further used to send the first feedback information to the terminal device.

[0380] Optionally, the transceiver unit 1101 is further used to send the first feedback information through a first time slot, where the first time slot is a downlink time slot configured between the first network device and the terminal device.

[0381] Among them, the communication device 110 is Fig. 9 Taking the terminal device in the method embodiment as an example, then:

[0382] The processing unit 1102 is used to detect a downlink reference signal from a first network device on at least one first carrier; the processing unit is also used to determine the signal strength of the downlink reference signal; and the transceiver unit 1101 is used to send uplink information to the first network device on the unauthorized resources corresponding to the activated carrier when the signal strength of the downlink reference signal is greater than or equal to a first set value.

[0383] Among them, the communication device 110 is Fig. 9 Taking the first network device in the method embodiment as an example, then:

[0384] The transceiver unit 1101 is used to send a downlink reference signal on at least one first carrier; and the processing unit 1102 is used to detect uplink information from a terminal device on the unlicensed resources corresponding to the activated carrier.

[0385] Among them, the communication device 110 is Fig.10 Taking the terminal device in the method embodiment as an example, then:

[0386] The processing unit 1102 is used to detect a downlink reference signal from a first network device on at least one first carrier; the processing unit is also used to determine the signal strength of the downlink reference signal; and the transceiver unit 1101 is used to send a first uplink signal to the first network device on the at least one first carrier when the signal strength of the downlink reference signal is greater than a second set value.

[0387] Optionally, the transceiver unit 1101 is further used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

[0388] Optionally, the processing unit 1101 is further configured to determine an initial uplink timing advance according to the downlink reference signal.

[0389] Optionally, the transceiver unit 1101 is further used to receive first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, and unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the transceiver unit 1101 is also used to receive second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0390] Among them, the communication device 110 is Fig.10 Taking the first network device in the method embodiment as an example, then:

[0391] The transceiver unit 1101 is used to send a downlink reference signal on at least one first carrier; and the processing unit 1102 is used to detect a first uplink signal sent by the terminal device on the at least one first carrier.

[0392] Optionally, the processing unit 1102 is further used to determine the signal strength of the first uplink signal on the at least one first carrier; the processing unit 1102 is further used to determine the activated carrier based on the signal strength of the first uplink signal on the at least one first carrier; and the transceiver unit 1101 is further used to send first feedback information, the first feedback information including information of the activated carrier in the at least one first carrier.

[0393] Optionally, the transceiver unit 1101 is used to send first indication information to the second network device, where the first indication information includes information of an activated carrier in at least one first carrier; or, the transceiver unit 1101 is also used to send the first feedback information to the terminal device.

[0394] Optionally, the transceiver unit 1101 is used to send first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, and unauthorized resource set identifier, the trigger indication information is used to activate the unauthorized resources corresponding to the activated carrier; or the transceiver unit 1101 is used to send second downlink control information, the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

[0395] Among them, all relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional unit, and will not be repeated here.

[0396] In this embodiment, the communication device 110 is presented in the form of dividing each functional unit in an integrated manner. The "unit" here may refer to an application specific integrated circuit (ASIC), a circuit, a processor and a memory that executes at least one software or firmware program, an integrated logic circuit, and / or other devices that can provide the above functions.

[0397] for example, Figure 3 The processor 301 in the communication device 300 shown can call the computer-executable instructions stored in the memory 303 to enable the communication device 300 to execute the communication method in the above method embodiment.

[0398] Specifically, Fig.11The functions / implementation processes of the transceiver unit 1101 and the processing unit 1102 can be Figure 3 The processor 301 in the communication device 300 shown calls the computer execution instructions stored in the memory 303 to implement. Or, Fig.11 The function / implementation process of the processing unit 1102 in Figure 3 The processor 301 in the communication device 300 shown calls the computer execution instructions stored in the memory 303 to implement, Fig.11 The function / implementation process of the transceiver unit 1101 can be Figure 3 The communication interface 304 in the communication device 300 shown in FIG.

[0399] Since the communication device 110 provided in this embodiment can execute the communication method in the above method embodiment, the technical effects that can be obtained can refer to the above method embodiment and will not be repeated here.

[0400] It should be noted that at least one of the above units or units can be implemented by software, hardware or a combination of the two. When any of the above units or units is implemented by software, the software exists in the form of computer program instructions and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method flow. The processor can be built into a system on chip (SoC) or ASIC, or it can be an independent semiconductor chip. In addition to the core used to execute software instructions for calculation or processing in the processor, it can also further include necessary hardware accelerators, such as field programmable gate arrays (FPGA), programmable logic devices (PLD), or logic circuits that implement dedicated logic operations.

[0401] When the above units or units are implemented in hardware, the hardware can be any one or any combination of a central processing unit (CPU), a microprocessor, a digital signal processing (DSP) chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0402] Optionally, the embodiment of the present application further provides a chip system, including: at least one processor and an interface, the at least one processor is coupled to a memory via the interface, and when the at least one processor executes a computer program or instruction in the memory, the method in any of the above method embodiments is executed. Optionally, the chip system can be composed of a chip, or can include a chip and other discrete devices, which is not specifically limited in the embodiment of the present application.

[0403] It should be understood that in the description of the embodiments of the present application, unless otherwise specified, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; wherein A and B can be singular or plural. Moreover, in the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, wherein a, b, c can be single or multiple. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the embodiments of the present application, the words "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be necessarily different. Meanwhile, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0404] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes at least one computer instruction. When the computer program instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or may include at least one server, data center or other data storage device that can be integrated with a medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0405] Although the embodiments of the present application are described herein in conjunction with various embodiments, in the process of implementing the embodiments of the present application for which protection is claimed, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0406] Although the embodiments of the present application have been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the embodiments of the present application. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the embodiments of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the embodiments of the present application. Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the embodiments of the present application and their equivalent technologies, the embodiments of the present application are also intended to include these changes and variations.

Claims

1. A communication method, characterized in that: The method comprises: Sending a first uplink signal to a first network device on at least one first carrier, where the first frequency band includes the at least one first carrier; receiving first feedback information; Among them, the first feedback information includes information of an activated carrier among the at least one first carrier, and the activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to a set value, and the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information.

2. The method according to claim 1, characterized in that: The first feedback information also includes a time advance value corresponding to the activated carrier, the time advance value corresponds to at least one activated carrier, or the time advance value corresponds one-to-one with at least one activated carrier, or the time advance value corresponds to at least one activated carrier group.

3. The method according to claim 1 or 2, characterized in that: The first feedback information is a random access response message or system information.

4. The method according to claim 1 or 2, characterized in that: The first uplink signal is a first preamble sequence, and the first uplink signal is used for random access and uplink measurement.

5. The method according to claim 1 or 2, characterized in that: The receiving first feedback information comprises: receiving the first feedback information from a second network device; Alternatively, the first feedback information is received from the first network device.

6. The method according to claim 1 or 2, characterized in that: The first feedback information also includes the first identification information and / or second identification information corresponding to the terminal device; wherein the first identification information includes at least one of the following: a cell wireless network temporary identification, a sequence identification corresponding to the uplink signal; the second identification information includes at least one of the following: a sequence identification corresponding to the uplink signal, a resource identification corresponding to the uplink signal.

7. A communication method, characterized in that: The method comprises: Detecting a first uplink signal on at least one first carrier, where the first frequency band includes the at least one first carrier; Determining a signal strength of a first uplink signal on the at least one first carrier; Determine, according to the signal strength of the first uplink signal on the at least one first carrier, an activated carrier in the at least one first carrier, where the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information, and the activated carrier is at least one carrier in the at least one first carrier whose signal strength is greater than or equal to a set value; First feedback information is sent, where the first feedback information includes information of an activated carrier in the at least one first carrier.

8. The method according to claim 7, characterized in that The first feedback information also includes a time advance value corresponding to the activated carrier, the time advance value corresponds to at least one activated carrier, or the time advance value corresponds one-to-one with at least one activated carrier, or the time advance value corresponds to at least one activated carrier group.

9. The method according to claim 7 or 8, characterized in that: The first feedback information is a random access response message or system information.

10. The method according to claim 7 or 8, characterized in that: The first uplink signal is a first preamble sequence, and the first uplink signal is used for random access and uplink measurement.

11. The method according to claim 7 or 8, characterized in that: The sending of the first feedback information comprises: Sending first indication information to the second network device, where the first indication information includes information of an activated carrier in the at least one first carrier; Alternatively, the first feedback information is sent to the terminal device.

12. The method according to claim 11, characterized in that The first feedback information also includes the first identification information and / or second identification information corresponding to the terminal device; wherein the first identification information includes at least one of the following: a cell wireless network temporary identification, a sequence identification corresponding to the uplink signal; the second identification information includes at least one of the following: a sequence identification corresponding to the uplink signal, a resource identification corresponding to the uplink signal.

13. A communication method, characterized in that: The method comprises: Detecting a downlink reference signal from a first network device on at least one first carrier, where the first frequency band includes the at least one first carrier; Determining a signal strength of the downlink reference signal; When the signal strength of the downlink reference signal is greater than or equal to a first set value, uplink information is sent to the first network device on the unauthorized resources corresponding to the activated carrier, and the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information. The activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to the set value.

14. A communication method, characterized in that: The method comprises: Sending a downlink reference signal on at least one first carrier, where the first frequency band includes the at least one first carrier; Uplink information from a terminal device is detected on the unauthorized resources corresponding to the activated carrier, and the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information. The activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to a set value.

15. A communication method, characterized in that: The method comprises: Detecting a downlink reference signal from a first network device on at least one first carrier, where the first frequency band includes the at least one first carrier; Determining a signal strength of the downlink reference signal; When the signal strength of the downlink reference signal is greater than a second set value, a first uplink signal is sent to the first network device on the at least one first carrier, and the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information, and the activated carrier is a carrier on which the signal strength of the downlink reference signal on the at least one first carrier is greater than or equal to the set value.

16. The method according to claim 15, characterized in that The method further comprises: Receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

17. The method according to claim 16, characterized in that The first feedback information includes second indication information, where the second indication information is used to indicate the activated authorization-free resources.

18. The method according to claim 16 or 17, characterized in that The first feedback information also includes an uplink timing advance offset value.

19. The method according to any one of claims 15 to 17, characterized in that: The method further comprises: Receive first downlink control information, where the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, a carrier identifier, and an unlicensed resource set identifier, where the trigger indication information is used to activate the unlicensed resource corresponding to the activated carrier; or Second downlink control information is received, where the second downlink control information is used to trigger transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

20. A communication method, characterized in that: The method comprises: Sending a downlink reference signal on at least one first carrier, where the first frequency band includes the at least one first carrier; When the signal strength of the downlink reference signal is greater than a second set value, the first uplink signal sent by the terminal device on the at least one first carrier is detected, and the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information, and the activated carrier is a carrier on which the signal strength of the downlink reference signal on the at least one first carrier is greater than or equal to the set value.

21. A communication device, characterized in that: include: A transceiver unit, configured to send a first uplink signal to a first network device on at least one first carrier, wherein the first frequency band includes the at least one first carrier; The transceiver unit is further configured to receive first feedback information; Among them, the first feedback information includes information of an activated carrier among the at least one first carrier, and the activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to a set value, and the activated carrier is activated for the device to access for uplink capacity expansion or to transmit uplink information.

22. The device according to claim 21, characterized in that The first feedback information also includes a time advance value corresponding to the activated carrier, the time advance value corresponds to at least one activated carrier, or the time advance value corresponds one-to-one with at least one activated carrier, or the time advance value corresponds to at least one activated carrier group.

23. The device according to claim 21 or 22, characterized in that The first feedback information is a random access response message or system information.

24. The device according to claim 21 or 22, characterized in that The first uplink signal is a first preamble sequence, and the first uplink signal is used for random access and uplink measurement.

25. The device according to claim 21 or 22, characterized in that: The transceiver unit is further configured to receive the first feedback information from a second network device; Alternatively, the transceiver unit is further configured to receive the first feedback information from the first network device.

26. The device according to claim 21 or 22, characterized in that The first feedback information also includes the first identification information and / or second identification information corresponding to the device; wherein the first identification information includes at least one of the following: a cell wireless network temporary identification, a sequence identification corresponding to the uplink signal; the second identification information includes at least one of the following: a sequence identification corresponding to the uplink signal, a resource identification corresponding to the uplink signal.

27. A communication device, characterized in that: include: A processing unit, configured to detect a first uplink signal on at least one first carrier, wherein the first frequency band includes the at least one first carrier; The processing unit is further configured to determine a signal strength of a first uplink signal on the at least one first carrier; The processing unit is further configured to determine, according to the signal strength of the first uplink signal on the at least one first carrier, an activated carrier among the at least one first carrier, wherein the activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to a set value, and the activated carrier is activated for the device to perform access for uplink capacity expansion or perform uplink information transmission; The transceiver unit is configured to send first feedback information, where the first feedback information includes information of an activated carrier in the at least one first carrier.

28. The device according to claim 27, characterized in that The first feedback information also includes a time advance value corresponding to the activated carrier, the time advance value corresponds to at least one activated carrier, or the time advance value corresponds one-to-one with at least one activated carrier, or the time advance value corresponds to at least one activated carrier group.

29. The device according to claim 27 or 28, characterized in that The first feedback information is a random access response message or system information.

30. The device according to claim 27 or 28, characterized in that The first uplink signal is a first preamble sequence, and the first uplink signal is used for random access and uplink measurement.

31. The device according to claim 27 or 28, characterized in that: The transceiver unit is further configured to send first indication information to the second network device, where the first indication information includes information of an activated carrier in the at least one first carrier; Alternatively, the transceiver unit is further used to send the first feedback information to the terminal device.

32. The device according to claim 31, characterized in that The first feedback information also includes the first identification information and / or second identification information corresponding to the terminal device; wherein the first identification information includes at least one of the following: a cell wireless network temporary identification, a sequence identification corresponding to the uplink signal; the second identification information includes at least one of the following: a sequence identification corresponding to the uplink signal, a resource identification corresponding to the uplink signal.

33. A communication device, characterized in that: include: A processing unit, configured to detect a downlink reference signal from a first network device on at least one first carrier, wherein the first frequency band includes the at least one first carrier; The processing unit is further configured to determine a signal strength of the downlink reference signal; A transceiver unit is used to send uplink information to the first network device on the unauthorized resources corresponding to the activated carrier when the signal strength of the downlink reference signal is greater than or equal to a first set value, the activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to the set value, and the activated carrier is activated for the device to access for uplink capacity expansion or to transmit uplink information.

34. A communication device, characterized in that: include: A transceiver unit, configured to send a downlink reference signal on at least one first carrier, wherein the first frequency band includes the at least one first carrier; A processing unit is used to detect uplink information from a terminal device on an unauthorized resource corresponding to an activated carrier, wherein the activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to a set value, and the activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information.

35. A communication device, characterized in that: include: A processing unit, configured to detect a downlink reference signal from a first network device on at least one first carrier, wherein the first frequency band includes the at least one first carrier; The processing unit is further configured to determine a signal strength of the downlink reference signal; A transceiver unit is used to send a first uplink signal to the first network device on the at least one first carrier when the signal strength of the downlink reference signal is greater than a second set value, and the activated carrier is activated for the device to access for uplink capacity expansion or to transmit uplink information. The activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to the set value.

36. The device according to claim 35, characterized in that: The transceiver unit is further used to receive first feedback information; wherein the first feedback information includes information of an activated carrier in the at least one first carrier.

37. The device according to claim 36, characterized in that The first feedback information includes second indication information, where the second indication information is used to indicate the activated authorization-free resources.

38. The device according to claim 36 or 37, characterized in that The first feedback information also includes an uplink timing advance offset value.

39. The device according to any one of claims 35 to 37, characterized in that: The transceiver unit is further used to receive first downlink control information, the first downlink control information includes at least one field, each field includes at least one of the following information: trigger indication information, carrier identifier, unlicensed resource set identifier, the trigger indication information is used to activate the unlicensed resource corresponding to the activated carrier; or The transceiver unit is further used to receive second downlink control information, where the second downlink control information is used to trigger the transmission of the first uplink signal, and the second downlink control information includes the trigger indication information.

40. A communication device, characterized in that: include: A transceiver unit, configured to send a downlink reference signal on at least one first carrier, wherein the first frequency band includes the at least one first carrier; A processing unit is used to detect a first uplink signal sent by a terminal device on the at least one first carrier when the signal strength of the downlink reference signal is greater than a second set value, and an activated carrier is activated for the terminal device to access for uplink capacity expansion or to transmit uplink information, and the activated carrier is at least one carrier among the at least one first carrier whose signal strength is greater than or equal to the set value.

41. A communication device, characterized in that: The communication device includes a processor, which is configured to implement the method according to any one of claims 1 to 6, or configured to implement the method according to any one of claims 7 to 12, or configured to implement the method according to claim 13, or configured to implement the method according to claim 14, or configured to implement the method according to any one of claims 15 to 19, or configured to implement the method according to claim 20.

42. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes instructions, which, when executed, enable the method according to any one of claims 1 to 6 to be implemented, or are configured to enable the method according to any one of claims 7 to 12 to be implemented, or are configured to enable the method according to claim 13 to be implemented, or are configured to enable the method according to claim 14 to be implemented, or are configured to enable the method according to any one of claims 15 to 19 to be implemented, or are configured to enable the method according to claim 20 to be implemented.

43. A computer program product, characterized in that The computer program product comprises instructions which, when executed, enable the method according to any one of claims 1 to 6 to be implemented, or are configured to enable the method according to any one of claims 7 to 12 to be implemented, or are configured to enable the method according to claim 13 to be implemented, or are configured to enable the method according to claim 14 to be implemented, or are configured to enable the method according to any one of claims 15 to 19 to be implemented, or are configured to enable the method according to claim 20 to be implemented.

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