A link reestablishment method and apparatus

Abstract

The embodiment of the application discloses a link reestablishment method and device, relates to the field of communication, and solves the problem that data cannot be continuously transmitted and communication is interrupted due to shielding in the process of communication between a base station and a UE. The specific scheme is as follows: when the UE detects that a first downlink beam pair set is invalid, the UE sends a first uplink signal to the base station by using a first uplink beam pair set through a first uplink channel at an n moment, and the first uplink signal is used to inform the base station that the first downlink beam pair set is invalid; the UE detects a first downlink signal sent by the base station through a first downlink channel by using a second downlink beam pair set at an n+k moment, obtains a first detection result, and the first downlink signal is used to confirm that the base station receives the first uplink signal. The embodiment of the application is used in the process of link reestablishment.

Description

Technical Field

[0001] This invention relates to the field of communications, and more particularly to a link reconstruction method and device. Background Technology

[0002] With the continuous development of communication technology and mobile bandwidth services, fifth-generation (5G) mobile communication technology has emerged. Since high frequencies offer vast bandwidth resources, 5G systems can utilize high frequencies as their operating frequencies. However, compared to low frequencies, high frequencies experience greater transmission loss. Therefore, beamforming technology—which involves assembling multiple antenna modules integrated into a transceiver to create an array and achieve directional beams—can be used to improve the transceiver's antenna gain and received signal power, thereby overcoming the transmission loss at high frequencies.

[0003] As is well known, in communication systems using beamforming technology, because both the receive and transmit beams are relatively narrow, both the UE and the base station need to undergo beam training to ensure normal access and stable communication with the base station. For example, the base station needs to sequentially send reference signals to the UE through different transmit beams. For each transmit beam, the UE needs to sequentially traverse all receive beams, measuring the reference information sent by the base station through that transmit beam. This allows the UE to select one or more optimal downlink beam pairs and report the selected downlink beam pair information to the base station. Similarly, the UE also needs to sequentially send reference signals to the base station through different transmit beams. For each transmit beam, the base station needs to sequentially traverse all receive beams, measuring the reference information sent by the UE through that transmit beam. This allows the base station to select one or more optimal uplink beam pairs and notify the UE of the selected uplink beam pair information.

[0004] As shown above, through the beam training process, both the base station and the UE can obtain one or more uplink and downlink beam pairs for communication. In subsequent communication, the base station and UE can use these determined uplink and downlink beam pairs for data transmission. However, during communication between the base station and UE, obstructions may occur, and the poor diffraction capability of high frequencies can block the beam pairs used for communication, preventing data transmission and thus interrupting communication. Summary of the Invention

[0005] This invention provides a link reconstruction method and device, which solves the problem of communication interruption caused by data loss due to obstruction during communication between the base station and the UE.

[0006] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0007] A first aspect of the present invention provides a link reconstruction method, comprising:

[0008] When the UE detects that the first downlink beam pair set has failed, it sends a first uplink signal to the base station through the first uplink channel using the first uplink beam pair set at time n. The first uplink signal is used to notify the base station that the first downlink beam pair set has failed. At time n+k, the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set, and obtains a first detection result. The first downlink signal is used to confirm that the base station has received the first uplink signal.

[0009] The link reconstruction method provided in this embodiment of the invention involves the UE detecting a failure of the first downlink beampair set. At time n, the UE sends a first uplink signal to the base station via the first uplink channel using the first uplink beampair set to notify the base station of the failure of the first downlink beampair set. At time n+k, the UE detects the first downlink signal sent by the base station via the first downlink channel using the second downlink beampair set, and obtains a first detection result. This first downlink signal is used to confirm that the base station has received the first uplink signal. By sending the first uplink signal to the base station to notify the base station of the failure of the first downlink beampair set, the UE enables the base station to send the first downlink signal via the first downlink channel using the second downlink beampair set. Through negotiation between the base station and the UE, the link can be restored, thereby solving the problem of data transmission interruption due to obstruction during communication between the base station and the UE.

[0010] In conjunction with the first aspect, in one possible implementation, the first downlink signal is determined based on the content contained in the first uplink signal.

[0011] In combination with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first downlink signal is a downlink control channel (NR-PDCCH) or a first measurement pilot; the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set at time n+k, and obtains the first measurement result, including: the UE performs blind detection on the downlink control channel according to the second downlink beam pair set at time n+k, and obtains the first measurement result, wherein the second downlink beam pair set is a pre-configured beam pair set for beam recovery, and the second downlink beam pair set is different from the first downlink beam pair set.

[0012] In combination with the first aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; at time n+k, the UE performs blind detection on the downlink control channel according to the second downlink beampair set to obtain the first measurement result, including: the UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result, the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the target downlink beampair set.

[0013] In combination with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first downlink signal is a downlink control channel NR-PDCCH; the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set at time n+k, and obtains the first measurement result, including: the UE obtains the first measurement result at time n+k based on the detection of the downlink control channel, and the first measurement result is the information of the target downlink beam pair set.

[0014] In combination with the first aspect and the above possible implementations, in another possible implementation, the downlink control channel further includes uplink resource information for reporting the first measurement result. The uplink resource information includes uplink time-frequency resources and / or information on the second uplink beam pair set. After the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set at time n+k and obtains the first measurement result, the following further includes: the UE sends the first measurement result to the base station at time n+k+k1 based on the uplink resource information.

[0015] In combination with the first aspect and the above possible implementations, in another possible implementation, after the UE sends the first measurement result to the base station at time n+k+k1 based on the uplink resource information, the method further includes: the UE detecting the third downlink channel at time n+k+k1+k2 to obtain information on the third downlink beampair set; and the UE communicating with the base station based on the information on the third downlink beampair set.

[0016] Combining the first aspect and the above possible implementations, in another possible implementation, the UE detects the third downlink channel at time n+k+k1+k2 to obtain information about the third downlink beam pair set, including: at time n+k+k1+k2, the UE performs blind detection on the third downlink channel based on the N optimal target downlink beam pairs in the target downlink beam pair set in the first measurement result to obtain information about the third downlink beam pair set.

[0017] In conjunction with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set; the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beampair set at time n+k, and obtains a first measurement result, including: the UE performs blind detection of the downlink control channel according to the first target downlink beampair set at time n+k, and obtains the first measurement result, wherein the first target downlink beampair set is different from the first downlink beampair set.

[0018] In conjunction with the first aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; at time n+k, the UE performs blind detection on the downlink control channel according to the first target downlink beampair set to obtain the first measurement result, including: the UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result, the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the second target downlink beampair set.

[0019] In conjunction with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set; the first downlink signal is a downlink control channel NR-PDCCH; the UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beampair set at time n+k, and obtains a first measurement result, including: the UE obtains the first measurement result at time n+k based on the detection of the downlink control channel, and the first measurement result is information about the second target downlink beampair set.

[0020] In combination with the first aspect and the above possible implementations, in another possible implementation, the first downlink signal includes information about the third downlink beampair set; after the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beampair set at time n+k and obtains the first detection result, the implementation further includes: the UE communicating with the base station based on the information about the third downlink beampair set.

[0021] In combination with the first aspect and the above possible implementations, in another possible implementation, the first downlink signal also includes information about the target uplink beampair set.

[0022] In combination with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request; after the user equipment (UE) sends the first uplink signal to the base station at time n via the first uplink channel using the first uplink beam pair set when it detects the failure of the first downlink beam pair set, the implementation further includes: the UE determining that it did not detect the first downlink signal at time n+k; and the UE retransmitting the first uplink signal to the base station at time n+k+k1 via the second uplink channel using the second uplink beam pair set.

[0023] In combination with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request; after the user equipment (UE) detects the failure of the first downlink beam pair set and sends the first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n, the implementation further includes: the UE determining that the first downlink signal was not detected at time n+k; the UE retransmitting the first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n+k+k1, wherein the transmission power used to transmit the first uplink signal at time n+k+k1 is increased by X compared to the transmission power used to transmit the first uplink signal at time n, where X is a preset power value.

[0024] In combination with the first aspect and the above possible implementations, another possible implementation also includes: the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam at time n+k+k1+k2, and obtains the first detection result.

[0025] In combination with the first aspect and the above possible implementations, in another possible implementation, the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beampair set at time n+k+k1+k2, and obtains the first measurement result, including: the UE performs blind detection on the downlink control channel according to the second downlink beampair set at time n+k+k1+k2, and obtains the first measurement result, the second downlink beampair set is a pre-configured beampair set for beam recovery, the second downlink beampair set is different from the first downlink beampair set, the first downlink signal contains information indicating the target uplink beampair set to the UE, and the information of the target uplink beampair set is obtained according to the second uplink beampair set.

[0026] In combination with the first aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; at time n+k+k1+k2, the UE performs blind detection on the downlink control channel according to the second downlink beam pair set to obtain the first measurement result, including: the UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result, the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the target downlink beam pair set.

[0027] Combining the first aspect and the above possible implementations, in another possible implementation, the first downlink signal is the downlink control channel NR-PDCCH; the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2, and obtains the first measurement result, including: the UE obtains the first measurement result based on the detection of the downlink control channel at time n+k+k1+k2, and the first measurement result is the information of the target downlink beam pair set.

[0028] In combination with the first aspect and the above possible implementations, in another possible implementation, the downlink control channel further includes uplink resource information for reporting the first measurement result. The uplink resource information includes uplink time-frequency resources and / or information on the third uplink beam pair set. After the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2 and obtains the first measurement result, the following further includes: the UE sends the first measurement result to the base station at time n+k+k1+k2+k3 based on the uplink resource information.

[0029] In combination with the first aspect and the above possible implementations, in another possible implementation, after the UE sends the first measurement result to the base station based on the uplink resource information at time n+k+k1+k2+k3, the method further includes: the UE detecting the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information on the third downlink beampair set; and the UE communicating with the base station based on the information on the third downlink beampair set.

[0030] Combining the first aspect and the above possible implementations, in another possible implementation, the UE detects the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information about the third downlink beam pair set, including: at time n+k+k1+k2+k3+k4, the UE performs blind detection on the third downlink channel based on the N optimal target downlink beam pairs in the target downlink beam pair set in the first measurement result to obtain information about the third downlink beam pair set.

[0031] In conjunction with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about a first target downlink beam pair set; the second downlink beam pair set is the first target downlink beam pair set; after the user equipment (UE) detects the failure of the first downlink beam pair set and sends the first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n, the implementation further includes: the UE determining that the first downlink signal was not detected at time n+k; and the UE retransmitting the first uplink signal to the base station via the second uplink channel using the second uplink beam pair set at time n+k+k1.

[0032] In combination with the first aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request; after the user equipment (UE) detects the failure of the first downlink beam pair set and sends the first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n, the implementation further includes: the UE determining that the first downlink signal was not detected at time n+k; the UE retransmitting the first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n+k+k1, wherein the transmission power used to transmit the first uplink signal at time n+k+k1 is increased by X compared to the transmission power used to transmit the first uplink signal at time n, where X is a preset power value.

[0033] In combination with the first aspect and the above possible implementations, another possible implementation further includes: the UE detects the first downlink signal sent by the base station to the set through the first downlink channel using the first target downlink beam at time n+k+k1+k2, and obtains the first detection result.

[0034] In combination with the first aspect and the above possible implementations, in another possible implementation, the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the UE detects the first downlink signal transmitted by the base station through the first downlink channel using a first target downlink beam pair set at time n+k+k1+k2, and obtains the first measurement result, including: the UE performs blind detection on the downlink control channel according to the first target downlink beam pair set at time n+k+k1+k2, and obtains the first measurement result, wherein the first target downlink beam pair set is different from the first downlink beam pair set.

[0035] In combination with the first aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; at time n+k+k1+k2, the UE performs blind detection on the downlink control channel according to the first target downlink beampair set to obtain the first measurement result, including: the UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result, the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the second target downlink beampair set.

[0036] Combining the first aspect and the above possible implementations, in another possible implementation, the first downlink signal is the downlink control channel NR-PDCCH; the UE detects the first downlink signal sent by the base station through the first downlink channel using the first target downlink beam pair set at time n+k+k1+k2, and obtains the first measurement result, including: the UE obtains the first measurement result based on the detection of the downlink control channel at time n+k+k1+k2, and the first measurement result is the information of the second target downlink beam pair set.

[0037] In combination with the first aspect and the above possible implementations, in another possible implementation, the first downlink signal includes information about the target uplink beam pair set; after the UE detects the first downlink signal sent by the base station through the first downlink channel using the first target downlink beam pair set at time n+k+k1+k2 and obtains the first measurement result, the method further includes: the UE sending the first measurement result to the base station through the target uplink beam pair set at time n+k+k1+k2+k3.

[0038] In combination with the first aspect and the above possible implementations, in another possible implementation, after the UE sends the first measurement result to the base station through the target uplink beam pair set at time n+k+k1+k2+k3, the method further includes: the UE detecting the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information about the third downlink beam pair set; and the UE communicating with the base station based on the information about the third downlink beam pair set.

[0039] Combining the first aspect and the above possible implementations, in another possible implementation, the UE detects the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information about the third downlink beam pair set, including: at time n+k+k1+k2+k3+k4, the UE performs blind detection on the third downlink channel based on the optimal N target downlink beam pairs in the second target downlink beam pair set in the first measurement result to obtain information about the third downlink beam pair set.

[0040] Combining the first aspect and the above possible implementations, in another possible implementation, the first uplink channel is a periodic PUCCH channel, and the periodic PUCCH information is also used to transmit HARQ, CSI information, beam information, and SR information.

[0041] In combination with the first aspect and the above possible implementations, in another possible implementation, the second uplink channel is a pre-configured uplink channel specifically for beam recovery, and the uplink beam configured in the second uplink channel is a beam specifically for uplink beam recovery, which is different from the uplink beam pair configured in the first uplink channel (the first beam pair is a beam pair configured for the periodic uplink control channel).

[0042] Combining the first aspect and the above possible implementations, in another possible implementation, the second uplink channel is a channel in the same time slot as RACH.

[0043] A second aspect of this invention provides a link reconstruction method, comprising:

[0044] The base station uses a first uplink beam pair set to detect a first uplink signal on the first uplink channel. The first uplink signal is used to notify the base station that the first downlink beam pair set has failed. The base station sends a first downlink signal to the UE through the first downlink channel using a second downlink beam pair set. The first downlink signal is used to confirm that the base station has received the first uplink signal.

[0045] The link reconstruction method provided in this invention involves a base station detecting a first uplink signal on a first uplink channel using a first uplink beampair set to notify the base station of the failure of a first downlink beampair set. The base station then sends a first downlink signal to the UE via a second downlink beampair set through the first downlink channel to confirm that the base station has received the first uplink signal. The UE sends the first uplink signal to the base station to notify it of the failure of the first downlink beampair set, enabling the base station to send the first downlink signal via the second downlink beampair set through the first downlink channel. Through negotiation between the base station and the UE, the link can be restored, thus solving the problem of data transmission interruption due to obstruction during communication between the base station and the UE.

[0046] In conjunction with the second aspect, in one possible implementation, the first downlink signal is determined based on the content contained in the first uplink signal.

[0047] In combination with the second aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request.

[0048] In conjunction with the second aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set.

[0049] In conjunction with the second aspect and the above possible implementations, in another possible implementation, the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; when the first downlink signal is a downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot.

[0050] In conjunction with the second aspect and the above possible implementations, in another possible implementation, the downlink control channel further includes uplink resource information for reporting the first measurement result, the uplink resource information including uplink time-frequency resources and / or information on the second uplink beam pair set; the method further includes: the base station receiving the first measurement result sent by the UE according to the uplink resource information.

[0051] In conjunction with the second aspect and the above possible implementations, in another possible implementation, after the base station receives the first measurement result sent by the UE based on the uplink resource information, the method further includes: the base station sending information about a third downlink beam pair set to the UE through a third downlink channel; and the base station communicating with the UE based on the information about the third downlink beam pair set.

[0052] In conjunction with the second aspect and the above possible implementations, in another possible implementation, before the base station sends a first downlink signal to the UE via the first downlink channel using the second downlink beam pair set, and the first downlink signal is used to confirm that the base station has received the first uplink signal, the method further includes: the base station detecting the first uplink signal via the second uplink channel using the second uplink beam pair set.

[0053] A third aspect of the present invention provides a UE, comprising: a transmitting unit, configured to transmit a first uplink signal to a base station at time n via a first uplink channel using the first uplink beam pair set when a first downlink beam pair set is detected to be invalid, the first uplink signal being used to notify the base station that the first downlink beam pair set is invalid; and a detecting unit, configured to detect the first downlink signal transmitted by the base station via the first downlink channel using a second downlink beam pair set at time n+k, and obtain a first detection result, the first downlink signal being used to confirm that the base station has received the first uplink signal.

[0054] In conjunction with the third aspect, in one possible implementation, the first downlink signal is determined based on the content contained in the first uplink signal.

[0055] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the detection unit is specifically used to: perform blind detection on the downlink control channel at time n+k based on the second downlink beam pair set to obtain the first measurement result, wherein the second downlink beam pair set is a pre-configured beam pair set for beam recovery, and the second downlink beam pair set is different from the first downlink beam pair set.

[0056] In conjunction with the third aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is a first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; the detection unit is specifically used to: measure the first measurement pilot according to the configuration information of the first measurement pilot to obtain a first detection result, wherein the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the target downlink beam pair set.

[0057] In combination with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first downlink signal is a downlink control channel NR-PDCCH; the detection unit is specifically used to: obtain a first measurement result at time n+k based on the detection of the downlink control channel, and the first measurement result is information about the target downlink beam pair set.

[0058] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the downlink control channel also includes uplink resource information for reporting the first measurement result, the uplink resource information including uplink time-frequency resources and / or information on the second uplink beam pair set; the transmitting unit is also used to transmit the first measurement result to the base station at time n+k+k1 based on the uplink resource information.

[0059] In conjunction with the third aspect and the above possible implementations, another possible implementation also includes: a communication unit; a detection unit, further configured to detect the third downlink channel at time n+k+k1+k2 to obtain information about the third downlink beampair set; and a communication unit configured to communicate with the base station based on the information about the third downlink beampair set.

[0060] In combination with the third aspect and the above possible implementations, in another possible implementation, the detection unit is specifically used to: at time n+k+k1+k2, perform blind detection on the third downlink channel based on the best N target downlink beam pairs in the target downlink beam pair set in the first measurement result, so as to obtain information about the third downlink beam pair set.

[0061] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set; the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the detection unit is specifically used to: perform blind detection on the downlink control channel at time n+k based on the first target downlink beampair set, and obtain a first measurement result, wherein the first target downlink beampair set is different from the first downlink beampair set.

[0062] In conjunction with the third aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; the detection unit is specifically used to: measure the first measurement pilot according to the configuration information of the first measurement pilot to obtain a first detection result, wherein the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the second target downlink beam pair set.

[0063] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about the first target downlink beam pair set; the second downlink beam pair set is the first target downlink beam pair set; the first downlink signal is the downlink control channel NR-PDCCH; the detection unit is specifically used to: obtain a first measurement result at time n+k based on the detection of the downlink control channel, and the first measurement result is information about the second target downlink beam pair set.

[0064] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first downlink signal includes information about a third downlink beampair set; the communication unit is further configured to communicate with the base station based on the information about the third downlink beampair set.

[0065] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request; it also includes: a determining unit; the determining unit is used to determine that no first downlink signal is detected at time n+k; the transmitting unit is further used to retransmit the first uplink signal to the base station at time n+k+k1 using the second uplink beam pair set through the second uplink channel.

[0066] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request; it also includes: a determining unit; the determining unit is used to determine that no first downlink signal is detected at time n+k; the transmitting unit is further used to retransmit the first uplink signal to the base station at time n+k+k1 through the first uplink channel using the first uplink beam pair set, wherein the transmission power used to transmit the first uplink signal at time n+k+k1 is increased by X compared to the transmission power used to transmit the first uplink signal at time n, where X is a preset power value.

[0067] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the detection unit is further configured to detect the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam to the set at time n+k+k1+k2, and obtain the first detection result.

[0068] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the detection unit is specifically used to: perform blind detection on the downlink control channel at time n+k+k1+k2 based on the second downlink beampair set to obtain the first measurement result, wherein the second downlink beampair set is a pre-configured beampair set for beam recovery, the second downlink beampair set is different from the first downlink beampair set, and the first downlink signal contains information indicating the target uplink beampair set to the UE, the information of the target uplink beampair set is obtained based on the second uplink beampair set.

[0069] In conjunction with the third aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is a first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; the detection unit is specifically used to: measure the first measurement pilot according to the configuration information of the first measurement pilot to obtain a first detection result, wherein the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the target downlink beam pair set.

[0070] In combination with the third aspect and the above possible implementations, in another possible implementation, the first downlink signal is the downlink control channel NR-PDCCH; the detection unit is specifically used to: obtain a first measurement result based on the detection of the downlink control channel at time n+k+k1+k2, the first measurement result being information of the target downlink beam pair set.

[0071] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the downlink control channel also includes uplink resource information for reporting the first measurement result, the uplink resource information including uplink time-frequency resources and / or information on the third uplink beam pair set; the transmitting unit is also used to transmit the first measurement result to the base station at time n+k+k1+k2+k3 according to the uplink resource information.

[0072] In conjunction with the third aspect and the above possible implementations, another possible implementation further includes: a communication unit; a detection unit, further configured to detect the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information about the third downlink beampair set; and a communication unit, configured to communicate with the base station based on the information about the third downlink beampair set.

[0073] In combination with the third aspect and the above possible implementations, in another possible implementation, the detection unit is specifically used to: at time n+k+k1+k2+k3+k4, perform blind detection on the third downlink channel based on the best N target downlink beam pairs in the target downlink beam pair set in the first measurement result, so as to obtain information on the third downlink beam pair set.

[0074] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set; it also includes: a determining unit; the determining unit is used to determine that the first downlink signal is not detected at time n+k; and a transmitting unit is further used to retransmit the first uplink signal to the base station at time n+k+k1 using the second uplink beampair set through the second uplink channel.

[0075] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request; it also includes: a determining unit, used to determine that no first downlink signal is detected at time n+k; and a transmitting unit, used to retransmit the first uplink signal to the base station at time n+k+k1 using the first uplink channel and the first uplink beam pair set, wherein the transmission power used to transmit the first uplink signal at time n+k+k1 is increased by X compared to the transmission power used to transmit the first uplink signal at time n, where X is a preset power value.

[0076] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the detection unit is further configured to detect the first downlink signal transmitted by the base station to the set through the first downlink channel using the first target downlink beam at time n+k+k1+k2, and obtain the first detection result.

[0077] In combination with the third aspect and the above possible implementations, in another possible implementation, the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot; the detection unit is specifically used to: perform blind detection on the downlink control channel at time n+k+k1+k2 based on the first target downlink beam pair set, and obtain the first measurement result, wherein the first target downlink beam pair set is different from the first downlink beam pair set.

[0078] In conjunction with the third aspect and the above possible implementations, in another possible implementation, when the first downlink signal is a downlink control channel, the downlink control channel contains configuration information of the first measurement pilot; when the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; the detection unit is specifically used to measure the first measurement pilot according to the configuration information of the first measurement pilot to obtain a first detection result, the first measurement pilot is a beam measurement pilot, and the first measurement result is information of the second target downlink beam pair set.

[0079] In combination with the third aspect and the above possible implementations, in another possible implementation, the first downlink signal is the downlink control channel NR-PDCCH; the detection unit is specifically used to obtain the first measurement result at time n+k+k1+k2 based on the detection of the downlink control channel, and the first measurement result is the information of the second target downlink beam pair set.

[0080] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the first downlink signal includes information about the target uplink beam pair set; the transmitting unit is further configured to transmit the first measurement result to the base station through the target uplink beam pair set at time n+k+k1+k2+k3.

[0081] In conjunction with the third aspect and the above possible implementations, in another possible implementation, the detection unit is further configured to detect the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information about the third downlink beam pair set; the communication unit is configured to communicate with the base station based on the information about the third downlink beam pair set.

[0082] In combination with the third aspect and the above possible implementations, in another possible implementation, the detection unit is specifically used to: at time n+k+k1+k2+k3+k4, perform blind detection on the third downlink channel based on the best N target downlink beam pairs in the second target downlink beam pair set in the first measurement result, so as to obtain information on the third downlink beam pair set.

[0083] A fourth aspect of the present invention provides a base station, comprising: a detection unit configured to detect a first uplink signal using a first uplink beampair set on a first uplink channel, the first uplink signal being used to notify the base station that a first downlink beampair set has failed; and a transmission unit configured to transmit a first downlink signal to a UE via a first downlink channel using a second downlink beampair set, the first downlink signal being used to confirm that the base station has received the first uplink signal.

[0084] In conjunction with the fourth aspect, in one possible implementation, the first downlink signal is determined based on the content contained in the first uplink signal.

[0085] In conjunction with the fourth aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or a beam recovery request.

[0086] In conjunction with the fourth aspect and the above possible implementations, in another possible implementation, the first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about the first target downlink beam pair set; the second downlink beam pair set is the first target downlink beam pair set.

[0087] In combination with the fourth aspect and the above possible implementations, in another possible implementation, the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot;

[0088] When the first downlink signal is a downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot.

[0089] In conjunction with the fourth aspect and the above possible implementations, in another possible implementation, the downlink control channel further includes uplink resource information for reporting the first measurement result, the uplink resource information including uplink time-frequency resources and / or information on the second uplink beam pair set; it also includes: a receiving unit; the receiving unit is used to receive the first measurement result sent by the UE according to the uplink resource information.

[0090] In conjunction with the fourth aspect and the above possible implementations, another possible implementation further includes: a communication unit; a transmission unit, further configured to transmit information about a third downlink beampair set to the UE via a third downlink channel; and a communication unit, configured to communicate with the UE based on the information about the third downlink beampair set.

[0091] In conjunction with the fourth aspect and the above possible implementations, in another possible implementation, the detection unit is also used to detect the first uplink signal using a second uplink beam pair set in the second uplink channel.

[0092] A fifth aspect of the present invention provides a UE, which may include: at least one processor, a memory, a transceiver, and a communication bus; the at least one processor is connected to the memory and the transceiver via the communication bus, the memory is used to store computer execution instructions, and when the UE is running, the processor executes the computer execution instructions stored in the memory to cause the UE to execute the link reconstruction method described in the first aspect or any possible implementation of the first aspect.

[0093] A sixth aspect of the present invention provides a base station, which may include: at least one processor, a memory, a transceiver, and a communication bus; the at least one processor is connected to the memory and the transceiver via the communication bus, the memory is used to store computer execution instructions, and when the base station is running, the processor executes the computer execution instructions stored in the memory to cause the base station to perform the link reconstruction method described in the second aspect or any of the possible implementations of the second aspect.

[0094] A seventh aspect of the present invention provides a computer storage medium for storing computer software instructions used by the UE, the computer software instructions including a program designed for executing the link reconstruction method described above.

[0095] An eighth aspect of the present invention provides a computer storage medium for storing computer software instructions used by the base station, the computer software instructions including a program designed for executing the link reconstruction method described above. Attached Figure Description

[0096] Figure 1 A simplified schematic diagram of a communication system architecture applicable to embodiments of the present invention is provided for reference.

[0097] Figure 2 A schematic diagram of the composition of a base station provided in an embodiment of the present invention;

[0098] Figure 3 A schematic diagram of the composition of a UE provided in an embodiment of the present invention;

[0099] Figure 4A A flowchart of a link reconstruction method provided in an embodiment of the present invention;

[0100] Figure 4B A flowchart of another link reconstruction method provided in an embodiment of the present invention;

[0101] Figure 4C A flowchart of another link reconstruction method provided in an embodiment of the present invention;

[0102] Figure 4D A flowchart of another link reconstruction method provided in an embodiment of the present invention;

[0103] Figure 4E This is a schematic diagram of signal resource allocation provided in an embodiment of the present invention;

[0104] Figure 5 This is a schematic diagram illustrating an application scenario of a link reconstruction method provided in an embodiment of the present invention;

[0105] Figure 6 This is a schematic diagram illustrating an application scenario of another link reconstruction method provided in an embodiment of the present invention;

[0106] Figure 7 This is a schematic diagram illustrating an application scenario of another link reconstruction method provided in an embodiment of the present invention;

[0107] Figure 8 This is a schematic diagram illustrating an application scenario of another link reconstruction method provided in an embodiment of the present invention;

[0108] Figure 9 A schematic diagram illustrating the composition of another UE provided in an embodiment of the present invention;

[0109] Figure 10 A schematic diagram illustrating the composition of another UE provided in an embodiment of the present invention;

[0110] Figure 11 A schematic diagram illustrating the composition of another base station provided in an embodiment of the present invention;

[0111] Figure 12 This is a schematic diagram of another base station configuration provided in an embodiment of the present invention. Detailed Implementation

[0112] This invention provides a link reconstruction method. The basic principle is as follows: When a UE detects a failure of a first downlink beampair set, at time n, it sends a first uplink signal to the base station via the first uplink channel using the first uplink beampair set to notify the base station of the failure. At time n+k, it detects the first downlink signal sent by the base station via the first downlink channel using the second downlink beampair set, obtaining a first detection result. This first downlink signal confirms that the base station has received the first uplink signal. By sending the first uplink signal to the base station to notify it of the failure of the first downlink beampair set, the UE enables the base station to send the first downlink signal via the first downlink channel using the second downlink beampair set. Through negotiation between the base station and the UE, the link can be restored, thus solving the problem of communication interruption caused by data loss due to obstruction during communication between the base station and the UE.

[0113] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0114] Figure 1The diagram illustrates a simplified schematic of a communication system architecture applicable to embodiments of the present invention. The communication system applicable to embodiments of the present invention can be a fifth-generation (5G) mobile communication system and its subsequent evolution, or it can be an LTE system, a third-generation (3G) mobile communication system, a second-generation (2G) mobile communication system, a Wireless Fidelity (WiFi) system, a World Interoperability for Microwave Access (WIMAX) system, or other communication systems. In the embodiments of the present invention, beamforming technology can be employed in all of the above-mentioned communication systems to achieve directional beams by assembling multiple antenna modules integrated in the transceiver into an array, enabling communication between devices within the communication system via directional beams.

[0115] like Figure 1 As shown, the communication system architecture may include: base station 11 and UE 12.

[0116] Base station 11 can be a wireless communication base station (BS) or base station controller, etc. Specifically, base station 11 can include user plane base stations and control plane base stations. Base station 11 is a device deployed in a radio access network to provide wireless communication functions for UE 12. Its main functions include: managing radio resources, compressing Internet Protocol (IP) headers and encrypting user data streams, selecting the Mobile Management Entity (MME) when a user equipment attaches, routing user plane data to the Service Gateway (SGW), organizing and sending paging messages, organizing and sending broadcast messages, and configuring measurement and measurement reports for mobility or scheduling purposes, etc. Base station 11 can include various forms of macro base stations, micro base stations, relay stations, access points, etc. In communication systems employing different wireless access technologies, the names of devices with base station functions may vary. For example, in LTE systems, they are called Evolved NodeBs (eNBs or eNodeBs); in 3G systems, they are called Node Bs; in 5G systems, they are called TRPs; and in next-generation communication systems, they are called gNBs, etc. As communication technologies evolve, the name "base station" may change. Furthermore, in other possible cases, base station 11 may be other devices that provide wireless communication functions for UE 12. For ease of description, in this embodiment of the invention, the device providing wireless communication functions for UE 12 is referred to as base station 11.

[0117] UE 12 can be a wireless terminal or a wired terminal. A wireless terminal can be a device that provides voice and / or data connectivity to a user, such as a handheld device with wireless connectivity (e.g., a mobile phone, smart terminal, multimedia device, or streaming media device), an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (e.g., Radio Access Network, RAN). The wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, for example, a portable, pocket-sized, handheld, computer-embedded, or in-vehicle mobile device, which exchanges voice and / or data with the radio access network.

[0118] Examples include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). Wireless terminals can also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, access points, remote terminals, access terminals, user terminals, and user agents. As one example, such as… Figure 1 As shown, the network architecture of the present invention includes a UE 12, which is a mobile phone.

[0119] In this embodiment of the invention, base station 11 and UE 12 communicate using one or more beam pairs, such as... Figure 1 As shown, base station 11 and UE 12 can use beam pair 1 for data transmission in the first moment and beam pair 2 for data transmission in the second moment.

[0120] Figure 2 This is a schematic diagram of the composition of a base station provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the base station may include at least one processor 21, a memory 22, a transceiver 23, and a bus 24.

[0121] The following is combined with Figure 2 A detailed introduction to each component of a base station:

[0122] Processor 21 is the control center of the base station. It can be a single processor or a collective term for multiple processing elements. For example, processor 21 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs).

[0123] The processor 21 can perform various functions of the base station by running or executing software programs stored in the memory 22 and calling data stored in the memory 22.

[0124] In a specific implementation, as one example, the processor 21 may include one or more CPUs, for example... Figure 2 CPU0 and CPU1 are shown in the diagram.

[0125] In a specific implementation, as one example, a base station may include multiple processors, for example... Figure 2 The processors 21 and 25 are shown. Each of these processors can be a single-core processor or a multi-core processor. A processor here can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0126] The memory 22 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed discs, laser discs, optical discs, digital universal discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory 22 may exist independently and be connected to the processor 21 via bus 24. The memory 22 may also be integrated with the processor 21.

[0127] The memory 22 is used to store the software program that executes the present invention, and the processor 21 controls its execution.

[0128] Transceiver 23 is used to communicate with other devices or communication networks, such as Ethernet, radioaccess network (RAN), wireless local area network (WLAN), etc. Transceiver 23 may include all or part of a baseband processor, and may optionally include an RF processor. The RF processor is used to transmit and receive RF signals, while the baseband processor is used to process baseband signals converted from RF signals or baseband signals that are about to be converted into RF signals.

[0129] Bus 24 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 2 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0130] Figure 2 The device structure shown does not constitute a limitation on the base station and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0131] Figure 3 This is a schematic diagram illustrating the composition of a UE (User Equipment) according to an embodiment of the present invention. Figure 3 As shown, the UE may include at least one processor 31, memory 32, transceiver 33 and bus 34.

[0132] The following is combined Figure 3 A detailed introduction to each component of the UE:

[0133] Processor 31 can be a single processor or a collective term for multiple processing elements. For example, processor 31 can be a general-purpose CPU, an ASIC, or one or more integrated circuits used to control the execution of the program of the present invention, such as one or more DSPs, or one or more FPGAs. Processor 31 can perform various functions of the UE by running or executing software programs stored in memory 32 and by calling data stored in memory 32.

[0134] In a specific implementation, as one embodiment, processor 31 may include one or more CPUs. For example, as... Figure 3As shown, processor 31 includes CPU0 and CPU1.

[0135] In a specific implementation, as one example, the UE may include multiple processors. For example, such as Figure 3 As shown, processors 31 and 35 are included. Each of these processors can be a single-CPU or a multi-CPU. A processor here can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0136] The memory 32 may be a ROM or other type of static storage device capable of storing static information and instructions, RAM or other type of dynamic storage device capable of storing information and instructions, or it may be an EEPROM, CD-ROM or other optical disc storage, optical disk storage (including compressed optical disks, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto. The memory 32 may exist independently and be connected to the processor 31 via bus 34. The memory 32 may also be integrated with the processor 31.

[0137] Transceiver 33 is used to communicate with other devices or communication networks, such as Ethernet, RAN, WLAN, etc. Transceiver 33 may include a receiving unit to implement the receiving function and a transmitting unit to implement the transmitting function.

[0138] Bus 34 can be an ISA bus, PCI bus, or EISA bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0139] Figure 3 The device structure shown does not constitute a limitation on the UE and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Although not shown, the UE may also include a battery, camera, Bluetooth module, GPS module, display screen, etc., which will not be described in detail here.

[0140] Figure 4A , 4B 4C and 4D are flowcharts of a link reconstruction method provided in an embodiment of the present invention, such as... Figure 4A , 4B As shown in Figures 4C and 4D, the method may include:

[0141] 401. The base station sends a second downlink signal to the UE using the first downlink beam pair set on the second downlink channel.

[0142] In communication systems employing beamforming technology, to ensure a UE's normal access to the base station and stable communication, both the UE and the base station need to undergo beam training to determine N optimal downlink beam pairs for downlink data transmission and M optimal uplink beam pairs for uplink data transmission. These optimal beam pairs are then used for data transmission during subsequent communication between the base station and the UE. N and M are both integers greater than or equal to 1. Assuming the downlink beam pairs are...<Bx,Bx’> Bx represents the base station's transmit beam, and Bx' represents the UE's receive beam. Assume the uplink beam pair is...<By,By’> By represents the UE's transmit beam, and By' represents the base station's receive beam.

[0143] For example, when a base station needs to send a second downlink signal to a UE, the base station can send the second downlink signal to the UE through a second downlink channel using a first downlink beampair set. This second downlink signal can be a signal pre-configured by the base station and associated with a control channel or data channel, such as a Channel State Information-Reference Signal (CSI-RS) or a synchronization signal. The first downlink beampair set includes at least one downlink beampair.

[0144] For example, suppose that during beam training, two downlink beam pairs are identified, namely...<B1,B1’> and<B2,B2’> .like Figure 5-8 As shown, when the base station needs to send CSI-RS to the UE, the base station can use downlink beamforming through the second downlink channel.<B1,B1’> and downlink beam pair<B2,B2’> Send the CSI-RS to the UE.

[0145] 402. The UE uses the first downlink beam pair set to detect the second downlink signal on the second downlink channel.

[0146] For example, such as Figure 5-8 As shown, the UE can use downlink beamforming on the second downlink channel.<B1,B1’> and downlink beam pair<B2,B2’> Detect CSI-RS.

[0147] 403. When the UE detects that the first downlink beam pair set has failed, it sends the first uplink signal to the base station through the first uplink channel using the first uplink beam pair set at time n.

[0148] For example, when the UE detects the second downlink signal using the first downlink beam pair set on the second downlink channel, and determines that the detected second downlink signal meets the preset conditions, it can be determined that the first downlink beam pair set has failed, that is, it can be determined that the downlink has failed.

[0149] Specifically, the UE can determine that the detected second downlink signal meets a preset condition when the Reference Signal Received Power (RSRP) of the detected second downlink signal is lower than a preset threshold. The preset threshold can be set according to the needs of the actual application scenario, and this embodiment of the invention does not impose specific limitations here. For example, ... Figure 5-8 As shown, the UE can use downlink beamforming on the second downlink channel.<B1,B1’> and downlink beam pair<B2,B2’> The second downlink signal is detected, and when the RSRP of the detected second downlink signal is determined to be lower than a preset threshold, the downlink beampair is determined.<B1,B1’> and downlink beam pair<B2,B2’> Invalid.

[0150] Specifically, the UE detects a failure in the first downlink beam pair set. This can be achieved by N out of the M downlink beam pairs in the set having a quality below a specific threshold. The first downlink beam pair set includes M downlink beam pairs, corresponding to M downlink reference signals. For example... Figure 4E As shown, the quality of the first downlink beam pair is determined by detecting the reception quality of its corresponding first downlink reference signal. The first downlink reference signal can be CSI-RS with the same QCL assumption in the downlink control channel (NR-PDCCH), SS block, or DMRS of the common control channel, or DMRS of the group common control channel.

[0151] When the failure of the first downlink beam pair set is detected, the UE can, at time n, send a first uplink signal to the base station via the first uplink channel using the first uplink beam pair set to notify the base station of the failure of the first downlink beam pair set. The first uplink beam pair set includes at least one first uplink beam pair. For example, assuming that during beam training, one uplink beam pair is determined, which is...<B3,B3’> .like Figure 5-8 As shown, the UE can, at time n, use the uplink beam pair through the first uplink channel.<B3,B3’> Send the first uplink signal to the base station.

[0152] In this embodiment of the invention, the first uplink signal can be of the following two types:

[0153] Type 1: The first uplink signal is a beam failure report or a beam recovery request. Specifically, when the UE does not have the ability to re-determine the downlink beam pair set, or when the UE has the ability to re-determine the downlink beam pair set but has not determined a downlink beam pair set that can be used for downlink data transmission, the UE may send the first uplink signal of the first type to the base station.

[0154] The second type: The first uplink signal is a beam failure report or beam recovery request, and the first uplink signal includes information about the target downlink beampair set. Specifically, when the UE has the ability to re-determine the downlink beampair set and determines a downlink beampair set that can be used for downlink data transmission, the UE can recommend the determined downlink beampair set to the base station as the target downlink beampair set, and can send the second type of first uplink signal to the base station. The target downlink beampair set is used by the base station to send downlink data to the UE, and the information of the target downlink beampair set may include: the beam identifier and beam quality of the target downlink beampair set.

[0155] For example, the beam quality of the target downlink beampair set could be the RSRP of each target downlink beampair in the target downlink beampair set, or it could be the Channel Quality Indicator (CQI) assuming data is transmitted according to a specific transmission mode. The transmission mode could be Space Frequency Block Code (SFBC) or precoder cycling.

[0156] 404. The base station uses the first uplink beam pair set to detect the first uplink signal on the first uplink channel.

[0157] For example, such as Figure 5-8 As shown, the base station can use uplink beam pairs on the first uplink channel.<B3,B3’> Detect the first uplink signal, and based on the detection result, perform the following steps:

[0158] like Figure 5 As shown, when the base station detects a first uplink signal using a first uplink beam pair on the first uplink channel, and the detected first uplink signal is of the first type, steps 405a-407a can be executed. (See also...) Figure 4A As shown.

[0159] like Figure 6As shown, when the base station detects a first uplink signal using a first uplink beam pair on the first uplink channel, and the detected first uplink signal is of the second type, steps 405b-406b can be executed. (See also...) Figure 4B As shown.

[0160] like Figure 7 As shown, when the base station fails to detect the first uplink signal using the first uplink beam pair set on the first uplink signal, and the first uplink signal sent by the UE in step 403 is of the first type, steps 405c-409c can be executed. See [link to relevant documentation]. Figure 4C As shown.

[0161] like Figure 8 As shown, when the base station fails to detect the first uplink signal using the first uplink beam pair set on the first uplink signal, and the first uplink signal sent by the UE in step 403 is of the second type, steps 405d-409d can be executed. See [link to relevant documentation]. Figure 4D As shown.

[0162] 405a. The base station sends a first downlink signal to the UE through the first downlink channel using the second downlink beam pair set.

[0163] When the base station detects a first uplink signal, and the detected first uplink signal is of type 1, the base station can determine that the first downlink beampair set has failed. At this time, the base station can send the first downlink signal to the UE via the first downlink channel using the second downlink beampair set. This first downlink signal is used to confirm that the base station has received the first uplink signal; that is, the first downlink signal is a response signal to the first uplink signal. For example, the first downlink signal can be a Physical Downlink Control Channel (PDCCH), or the first downlink signal can be a first measurement pilot. For instance, as... Figure 5 As shown, the base station uses downlink beamforming through the first downlink channel.<B4,B4’> Downlink beampair<B5,B5’> Downlink beampair<B6,B6’> and downlink beam pair<B7,B7’> The PDCCH is repeatedly sent to the UE.

[0164] For example, the base station may pre-configure beam information for each second downlink beam pair in the second downlink beam pair set. Thus, for each second downlink beam pair, the base station can transmit a first downlink signal to the UE via the first downlink channel using that second downlink beam pair, based on the pre-configured beam information. The beam information may be Quality Control Level (QCL) information, which may include beam pair information.

[0165] For example, it may include the beam pattern corresponding to each Orthogonal Frequency Division Multiplexing (OFDM) symbol, or the QCL association between each OFDM symbol and different CSI-RS or CSI-SS, such as the first OFDM symbol being associated with CSI-RS configuration 1 corresponding to beam 1, and the second OFDM symbol being associated with CSI-RS configuration 2 corresponding to beam 2.

[0166] 406a. At time n+k, the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam to the set, and obtains the first detection result.

[0167] Specifically, the UE can detect the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beampair set at time n+k, and obtain a first detection result. Furthermore, based on the first detection result, the UE can select a superior downlink beampair set as the target downlink beampair set from the second downlink beampair set and / or other downlink beampair sets. The determined target downlink beampair set may include at least one target downlink beampair.

[0168] For example, such as Figure 5 As shown, at time n+k, the UE uses downlink beamforming on the base station through the first downlink channel.<B4,B4’> Downlink beampair<B5,B5’> Downlink beampair<B6,B6’> and downlink beam pair<B7,B7’> The first downlink signal is detected to obtain a first detection result, and based on the first detection result, the downlink beam is adjusted.<B4,B4’> Downlink beampair<B5,B5’> Downlink beampair<B6,B6’> and downlink beam pair<B7,B7’> The optimal set of downlink beam pairs is selected as the target downlink beam pair set. Assume the target downlink beam pair determined by the UE is...<B4,B4’> Of course, the target downlink beam pair set determined by the UE may not belong to the second downlink beam pair set.

[0169] For example, step 406a can be implemented in three ways:

[0170] In a first possible implementation, the first downlink signal is a downlink control channel (NR-PDCCH), and the downlink control channel contains configuration information of a first measurement pilot. The UE can perform blind detection on the downlink control channel at time n+k based on a second downlink beampair set to obtain a first measurement result. This second downlink beampair set is a pre-configured beampair set for beam recovery, and it differs from the first downlink beampair set. Specifically, the UE's blind detection of the downlink control channel at time n+k based on the second downlink beampair set to obtain the first measurement result can be achieved by the UE measuring the first measurement pilot at time n+k based on the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first measurement result is information about the target downlink beampair set.

[0171] In the second possible implementation, the first downlink signal is a first measurement pilot, and the configuration information of the first measurement pilot is pre-configured in the UE. The UE can perform blind detection on the downlink control channel at time n+k based on the second downlink beampair set to obtain the first measurement result. This second downlink beampair set is a pre-configured beampair set for beam recovery, and it differs from the first downlink beampair set. Specifically, the UE's blind detection of the downlink control channel at time n+k based on the second downlink beampair set to obtain the first measurement result can be achieved by the UE measuring the first measurement pilot according to its configuration information to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first measurement result is information about the target downlink beampair set.

[0172] In the third possible implementation, the first downlink signal is the downlink control channel (NR-PDCCH). The UE can obtain the first measurement result at time n+k based on the detection of the downlink control channel. The first measurement result is the information of the target downlink beam pair set.

[0173] Furthermore, the downlink control channel may also include uplink resource information for reporting the first measurement result, which includes uplink time-frequency resources and / or information on a second uplink beampair set. This second uplink beampair set may be a beampair set different from the first uplink beampair set, or it may be a beampair set identical to the first uplink beampair set, or it may be a set containing some uplink beampairs from the first uplink beampair set.

[0174] 407a. At time n+k+k1, the UE sends the first measurement result to the base station based on the uplink resource information.

[0175] After the UE obtains the first measurement result, it can send the first measurement result, containing the target downlink beampair set, to the base station at time n+k+k1 based on the uplink resource information. Upon receiving the first measurement result, the base station can determine the third downlink beampair set based on it. This third downlink beampair set can be a beampair set different from the target downlink beampair set, the same as the target downlink beampair set, or a set containing some downlink beampairs from the target downlink beampair set. Thus, the UE can detect the third downlink channel at time n+k+k1+k2 and obtain the information of the third downlink beampair set for subsequent communication with the base station. The base station can then send the information of the third downlink beampair set to the UE on the third downlink channel using the target downlink beampair set included in the first measurement result.

[0176] For example, such as Figure 5 As shown, assuming the target downlink beam pair determined by the UE is<B4,B4’> The UE can send a target downlink beam pair to the base station.<B4,B4’> Based on the first measurement result of the information, after the base station determines the third downlink beam pair set according to the first measurement result, such as the determined third downlink beam pair being...<B4,B4’> Then the downlink beampair can be set to<B4,B4’> The information is sent to the UE, so that in subsequent communications, the base station can use downlink beamforming.<B4,B4’> Send downlink data to the UE.

[0177] Specifically, the UE detects the third downlink channel at time n+k+k1+k2 to obtain information about the third downlink beam pair set. Alternatively, at time n+k+k1+k2, the UE performs blind detection on the third downlink channel based on the N optimal target downlink beam pairs in the target downlink beam pair set from the first measurement result to obtain information about the third downlink beam pair set.

[0178] 405b. The base station sends a first downlink signal to the UE through the first downlink channel using the first target downlink beam pair set.

[0179] When the base station detects a first uplink signal, and the detected first uplink signal is of type two, the base station can know that the first downlink beampair set has failed, and can know the downlink beampair set recommended by the UE, i.e., the first target downlink beampair set. At this time, the base station can send the first downlink signal to the UE through the first downlink channel using the first target downlink beampair set. For example, as... Figure 6 As shown, the base station uses downlink beamforming through the first downlink channel.<B4,B4’> Send the first downlink signal to the UE.

[0180] For example, the base station pre-configures beam information for each first target downlink beam pair in the first target downlink beam pair set. Thus, for each first target downlink beam pair, the base station can transmit a first downlink signal to the UE via the first downlink channel using the pre-configured beam information for that first target downlink beam pair. The beam information can be QCL information, which may include beam pair information, such as the beam pattern corresponding to each OFDM symbol, or the QCL association between each OFDM symbol and different CSI-RS or CSI-SS, for example, the first OFDM symbol is associated with CSI-RS configuration 1 corresponding to beam 1, and the second OFDM symbol is associated with CSI-RS configuration 2 corresponding to beam 2.

[0181] 406b. At time n+k, the UE detects the first downlink signal sent by the base station through the first downlink channel using the first target downlink beam to the set, and obtains the first detection result.

[0182] Specifically, the UE can detect the first downlink signal transmitted by the base station through the first downlink channel using the first target downlink beam pair set at time n+k, and obtain a first detection result. Furthermore, based on the first detection result, the UE can select a superior downlink beam pair set from the first target downlink beam pair set and / or other downlink beam pair sets as a second target downlink beam pair set. The determined second target downlink beam pair set may include at least one target downlink beam pair. Thus, in subsequent communications, the base station can use the second target downlink beam pair set to communicate with the UE.

[0183] The second target downlink beam pair set may be the same as the first target downlink beam pair set, or it may be different from the first target downlink beam pair set, or it may include some downlink beam pairs in the first target downlink beam pair set.

[0184] For example, such as Figure 6 As shown, the UE uses downlink beamforming on the first downlink channel for the base station.<B4,B4’> The first downlink signal transmitted is measured, and the downlink beampair is determined based on the measurement results.<B4,B4’> It can provide a downlink beampair for the second target, and in subsequent communications, the base station can use the downlink beampair.<B4,B4’> Send downlink data to the UE.

[0185] For example, step 406b can be implemented in three ways:

[0186] In a first possible implementation, the first downlink signal is a downlink control channel (NR-PDCCH), and the downlink control channel contains configuration information of a first measurement pilot. The UE can perform blind detection on the downlink control channel at time n+k based on a first target downlink beampair set to obtain a first measurement result. This first target downlink beampair set is different from the first downlink beampair set. Specifically, the UE's blind detection of the downlink control channel at time n+k based on the first target downlink beampair set to obtain the first measurement result can be as follows: the UE measures the first measurement pilot at time n+k based on the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first measurement result is information about a second target downlink beampair set.

[0187] In the second possible implementation, the first downlink signal is a first measurement pilot, and the configuration information of the first measurement pilot is pre-configured in the UE. The UE can perform blind detection on the downlink control channel at time n+k based on the first target downlink beampair set to obtain a first measurement result. This first target downlink beampair set is different from the first downlink beampair set. Specifically, the UE performing blind detection on the downlink control channel at time n+k based on the first target downlink beampair set to obtain the first measurement result can be: the UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result; the first measurement pilot is a beam measurement pilot, and the first measurement result is information about the second target downlink beampair set.

[0188] In the third possible implementation, the first downlink signal is the downlink control channel (NR-PDCCH). The UE can obtain the first measurement result at time n+k based on the detection of the downlink control channel. The first measurement result is the information of the second target downlink beam pair set.

[0189] Furthermore, the first downlink signal may include information about the third downlink beampair set. Thus, after the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beampair set at time n+k and obtains the first detection result, the UE can also communicate with the base station based on the information about the third downlink beampair set.

[0190] It should be noted that the specific descriptions of steps 405b-406b in the embodiments of the present invention can be found in the specific descriptions of steps 405a-407a in the embodiments of the present invention, and will not be repeated here.

[0191] 405c. If the UE determines that it did not detect the first downlink signal at time n+k, the UE will resend the first uplink signal to the base station at time n+k+k1 using the second uplink beam pair set through the second uplink channel.

[0192] When the base station does not detect the first uplink signal, it will not return response information (i.e., the first downlink signal) to the UE. At this time, the UE determines that it did not detect the first downlink signal at time n+k, and the UE can retransmit the first uplink signal to the base station through the second uplink channel using the second uplink beam pair set. In this case, it is assumed that the first uplink signal is of type 1.

[0193] For example, such as Figure 7 As shown, the UE uses uplink beamforming through the second uplink channel at time n+k.<B8,B8’> Uplink beampair<B9,B9’> Uplink beampair<B10,B10’> and uplink beam pair<B11,B11’> The UE retransmits the first uplink signal to the base station. For example, the UE is pre-configured with the beam information of each second uplink beam pair in the second uplink beam pair set. Thus, for each second uplink beam pair, the UE can retransmit the first uplink signal to the base station via the second uplink channel using the pre-configured beam information of the second uplink beam pair.

[0194] 406c. The base station detects the first uplink signal sent by the UE through the second uplink channel using the second uplink beam pair set, obtains the second detection result, and determines the target uplink beam pair set based on the second detection result.

[0195] Specifically, for each second uplink beampair in the second uplink beampair set, the base station can detect the first uplink signal transmitted by the UE through the second uplink channel using that second uplink beampair, and obtain a second detection result. At this point, the base station can select a superior uplink beampair as the target uplink beampair from the second uplink beampair set and / or other uplink beampair sets based on the second detection result. The determined target uplink beampair can be one or more.

[0196] For example, such as Figure 7 As shown, the base station uses uplink beamforming on the second uplink channel.<B8,B8’> Uplink beampair<B9,B9’> Uplink beampair<B10,B10’> and uplink beam pair<B11,B11’> The second uplink signal is measured, and the result is used to measure the uplink beam.<B8,B8’> Uplink beampair<B9,B9’> Uplink beam pair<B10,B10’> and uplink beam pair<B11,B11’> The base station selects the optimal uplink beam pair from the set of uplink beam pairs and / or other uplink beam pairs as the target uplink beam pair. Assume the target uplink beam pair determined by the base station is...<B9,B9’> .

[0197] 407c. The base station sends the first downlink signal to the UE through the first downlink channel using the second downlink beam pair set.

[0198] The first downlink signal includes information about the target uplink beam pair.

[0199] 408c. At time n+k+k1+k2, the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam to the set, and obtains the first detection result.

[0200] Specifically, the UE can detect the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beampair set at time n+k+k1+k2, and obtain a first detection result. Furthermore, based on the first detection result, the UE can select a better downlink beampair set as the target downlink beampair set from the second downlink beampair set and / or other downlink beampair sets.

[0201] The determined target downlink beam pair set may include at least one target downlink beam pair. The downlink beam pairs included in the target downlink beam pair set determined by the UE may or may not belong to the second downlink beam pair set.

[0202] For example, step 408c can be implemented in three ways:

[0203] In a first possible implementation, the first downlink signal is a downlink control channel (NR-PDCCH), and the downlink control channel contains configuration information of a first measurement pilot. The UE can perform blind detection on the downlink control channel at time n+k+k1+k2 based on a second downlink beampair set to obtain a first measurement result. This second downlink beampair set is a pre-configured beampair set for beam recovery, and it differs from the first downlink beampair set. Specifically, the UE can perform blind detection on the downlink control channel at time n+k+k1+k2 based on the second downlink beampair set to obtain the first measurement result. This can be achieved by the UE measuring the first measurement pilot at time n+k+k1+k2 based on the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first measurement result is information about the target downlink beampair set.

[0204] In the second possible implementation, the first downlink signal is a first measurement pilot, and the configuration information of the first measurement pilot is pre-configured in the UE. The UE can perform blind detection on the downlink control channel at time n+k+k1+k2 based on the second downlink beampair set to obtain a first measurement result. This second downlink beampair set is a pre-configured beampair set for beam recovery, and it differs from the first downlink beampair set. Specifically, the UE can perform blind detection on the downlink control channel at time n+k+k1+k2 based on the second downlink beampair set to obtain the first measurement result. This can be achieved by the UE measuring the first measurement pilot according to its configuration information to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first measurement result is information about the target downlink beampair set.

[0205] In the third possible implementation, the first downlink signal is the downlink control channel (NR-PDCCH). The UE can obtain the first measurement result at time n+k+k1+k2 based on the detection of the downlink control channel. The first measurement result is the information of the target downlink beam pair set.

[0206] Furthermore, the downlink control channel may also include uplink resource information for reporting the first measurement result, which includes uplink time-frequency resources and / or information on a second uplink beampair set. This second uplink beampair set may be a beampair set different from the first uplink beampair set, or it may be a beampair set identical to the first uplink beampair set, or it may be a set containing some uplink beampairs from the first uplink beampair set.

[0207] 409c. At time n+k+k1+k2+k3, the UE sends the first measurement result to the base station based on the uplink resource information.

[0208] After the UE determines the target downlink beam pair set, it can send a first measurement result, including information about the target downlink beam pair, to the base station on the third uplink channel using the target uplink beam pair determined in step 406c. Thus, after receiving the first measurement result, the base station can obtain the information about the target downlink beam pair and use it to communicate with the UE in subsequent communications.

[0209] It should be noted that the specific descriptions of steps 405c-409c in the embodiments of the present invention can be found in the specific descriptions of the corresponding contents in other steps of the embodiments of the present invention, and will not be repeated here.

[0210] 405d. If the UE determines that it did not detect the first downlink signal at time n+k, the UE will resend the first uplink signal to the base station at time n+k+k1 using the second uplink beam pair set on the second uplink channel.

[0211] When the base station does not detect the first uplink signal, it will not return response information (i.e., the first downlink signal) to the UE. At this time, the UE determines that it did not detect the first downlink signal at time n+k. The UE can then retransmit the first uplink signal to the base station at time n+k+k1 using the second uplink beampair set via the second uplink channel. Assume the first uplink signal is of the second type, meaning it includes information about the first target downlink beampair set.

[0212] For example, the UE is pre-configured with beam information for each second uplink beam pair in the second uplink beam pair set. In this way, for each second uplink beam pair, the UE can retransmit the first uplink signal to the base station through the second uplink channel using the second uplink beam pair according to the pre-configured beam information of the second uplink beam pair.

[0213] 406d. The base station detects the first uplink signal sent by the UE through the second uplink channel using the second uplink beam pair set, obtains the second detection result, and determines the target uplink beam pair set based on the second detection result.

[0214] Specifically, for each second uplink beampair in the second uplink beampair set, the base station can detect the first uplink signal transmitted by the UE through the second uplink channel using that second uplink beampair, and obtain a second detection result. At this point, the base station can select a superior uplink beampair as the target uplink beampair from the second uplink beampair set and / or other uplink beampair sets based on the second detection result. The determined target uplink beampair can be one or more.

[0215] 407d. The base station sends the first downlink signal to the UE through the first downlink channel using the first target downlink beam pair set.

[0216] When the base station detects a first uplink signal, and the detected first uplink signal is of type two, the base station can know that the first downlink beampair information has failed, and can know the downlink beampair information recommended by the UE, i.e., the first target downlink beampair information. At this time, the base station can send the first downlink signal to the UE using the first target downlink beampair on the first downlink channel. For example, as... Figure 8 As shown, the base station uses downlink beamforming on the first downlink channel.<B4,B4’> A first downlink signal is sent to the UE. This first downlink signal includes information about the second target uplink beampair set.

[0217] 408d. At time n+k+k1+k2, the UE detects the first downlink signal sent by the base station through the first downlink channel using the first target downlink beam to the set, and obtains the first detection result.

[0218] Specifically, the UE can detect the first downlink signal transmitted by the base station through the first downlink channel using the first target downlink beam pair set at time n+k+k1+k2, and obtain a first detection result. Furthermore, based on the first detection result, the UE can select a superior downlink beam pair set from the first target downlink beam pair set and / or other downlink beam pair sets as a second target downlink beam pair set. The determined second target downlink beam pair set may include at least one target downlink beam pair. The downlink beam pairs included in the second target downlink beam pair set determined by the UE may or may not belong to the second downlink beam pair set.

[0219] For example, step 408d can be implemented in three ways:

[0220] In a first possible implementation, the first downlink signal is a downlink control channel (NR-PDCCH), and the downlink control channel contains configuration information for the first measurement pilot. The UE can perform blind detection on the downlink control channel at time n+k+k1+k2 based on the first target downlink beampair set to obtain the first measurement result. The second downlink beampair set is a pre-configured beampair set for beam recovery, and the first target downlink beampair set is different from the first downlink beampair set.

[0221] Specifically, at time n+k+k1+k2, the UE performs blind detection on the downlink control channel based on the first target downlink beam pair set to obtain the first measurement result. Specifically, at time n+k+k1+k2, the UE measures the first measurement pilot based on the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is the beam measurement pilot, and the first measurement result is the information of the second target downlink beam pair set.

[0222] In the second possible implementation, the first downlink signal is a first measurement pilot, and the configuration information of the first measurement pilot is pre-configured in the UE. The UE can perform blind detection on the downlink control channel at time n+k+k1+k2 based on a first target downlink beampair set to obtain the first measurement result. This first target downlink beampair set is a pre-configured beampair set for beam recovery, and the first target downlink beampair set is different from the first downlink beampair set.

[0223] Specifically, at time n+k+k1+k2, the UE performs blind detection on the downlink control channel based on the first target downlink beam pair set to obtain the first measurement result. Specifically, the UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first measurement result is the information of the second target downlink beam pair set.

[0224] In the third possible implementation, the first downlink signal is the downlink control channel (NR-PDCCH). The UE can obtain the first measurement result at time n+k+k1+k2 based on the detection of the downlink control channel. The first measurement result is the information of the second target downlink beam pair set.

[0225] At time n+k+k1+k2+k3, the UE sends the first measurement result to the base station based on the uplink resource information.

[0226] For example, such as Figure 8 As shown, assume the target uplink beam pair determined by the base station is<B5,B5’> Then the UE can use the target uplink beam pair as<B5,B5’> It then sends the first measurement result to the base station based on the uplink resource information.

[0227] In addition, in this embodiment of the invention, the first uplink channel is a periodic PUCCH channel, and the periodic PUCCH information is also used to transmit HARQ, CSI, beam information, SR information, etc. The second uplink channel is a pre-configured uplink channel specifically for beam recovery. The uplink beams configured in the second uplink channel are specifically for uplink beam recovery and are different from the uplink beam pairs configured in the first uplink channel (the first beam pair is the beam pair configured for the periodic uplink control channel). The second uplink channel is a channel in the same time slot as RACH.

[0228] It should be noted that the specific descriptions of steps 405d-409d in this embodiment of the invention can be found in the specific descriptions of the corresponding contents in other steps of this embodiment of the invention, and will not be repeated here. Furthermore, n, k, k1, k2, k3, and k4 in this embodiment of the invention are all positive integers.

[0229] Additionally, it should be noted that in this embodiment of the invention, when the UE does not detect the first downlink signal at time n+k, it notifies the base station of the failure of the first downlink beam pair set by retransmitting the first uplink signal to the base station at time n+k+k1. Alternatively, when the failure of the first downlink beam pair set is detected, the UE can also transmit the first uplink signal to the base station at time n via the second uplink channel using the second uplink beam pair set.

[0230] The link reconstruction method provided in this embodiment of the invention involves the UE detecting a failure of the first downlink beampair set. At time n, the UE sends a first uplink signal to the base station via the first uplink channel using the first uplink beampair set to notify the base station of the failure of the first downlink beampair set. At time n+k, the UE detects the first downlink signal sent by the base station via the first downlink channel using the second downlink beampair set, and obtains a first detection result. This first downlink signal is used to confirm that the base station has received the first uplink signal. By sending the first uplink signal to the base station to notify the base station of the failure of the first downlink beampair set, the UE enables the base station to send the first downlink signal via the first downlink channel using the second downlink beampair set. Through negotiation between the base station and the UE, the link can be restored, thereby solving the problem of data transmission interruption due to obstruction during communication between the base station and the UE.

[0231] The above mainly describes the solutions provided by the embodiments of the present invention from the perspective of the interaction between various network elements. It is understood that each network element, such as a base station or UE, includes corresponding hardware structures and / or software modules to perform the above functions. Those skilled in the art should readily recognize that, in conjunction with the algorithm steps of the examples described in the embodiments disclosed herein, the present invention can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0232] In this embodiment of the invention, the base station and UE can be divided into functional modules according to the above method example. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this embodiment of the invention is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0233] When dividing each function into modules according to its corresponding function. Figure 9 A schematic diagram of a possible composition of the UE involved in the above and embodiments is shown, such as... Figure 9 As shown, the UE may include: a transmitting unit 51 and a detection unit 52.

[0234] The transmitting unit 51 is used to support UE execution. Figure 4A Steps 403 and 407a in the method shown, Figure 4B Step 403 in the method shown, Figure 4C Steps 403, 405c, and 409c in the method shown, Figure 4D Steps 403, 405d, and 409d in the method shown.

[0235] Detection unit 52 is used to support UE execution Figure 4A Steps 402 and 406a in the method shown, Figure 4B Steps 402 and 406b in the method shown, Figure 4C Steps 402 and 408c in the method shown, Figure 4D Steps 402 and 408d in the method shown.

[0236] In this embodiment of the invention, further, such as Figure 9 As shown, the UE may also include: a communication unit 53.

[0237] Communication unit 53, used to support UE execution Figure 4A , 4B The methods shown in 4C and 4D illustrate the operation of communication between the base station and the UE.

[0238] It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0239] The UE provided in this embodiment of the invention is used to execute the above-described link reconstruction method, and thus can achieve the same effect as the above-described link reconstruction method.

[0240] When using integrated units, Figure 10 A schematic diagram illustrating another possible composition of the UE involved in the above embodiments is shown. For example... Figure 10 As shown, the UE includes a processing module 61 and a communication module 62.

[0241] Processing module 61 is used to control and manage the actions of the UE. For example, processing module 61 is used to support the UE in performing actions. Figure 4A Steps 402 and 406a in the method shown, Figure 4B Steps 402 and 406b in the method shown, Figure 4C Steps 402 and 408c in the method shown, Figure 4D Steps 402, 408d in the method shown, and / or other processes used in the techniques described herein.

[0242] Communication module 62 is used to support communication between the UE and other network entities, such as with... Figure 1 , Figure 2 , Figure 11 or Figure 12The communication between functional modules or network entities shown in the diagram. For example, communication module 62 is used to support UE execution. Figure 4A Steps 403 and 407a in the method shown, Figure 4B Step 403 in the method shown, Figure 4C Steps 403, 405c, and 409c in the method shown, Figure 4D Steps 403, 405d, and 409d in the method shown. The UE may also include a storage module 63 for storing the UE's program code and data.

[0243] The processing module 61 may be a processor or a controller. It can implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this invention. The processor may also be a combination that implements computational functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc. The communication module 62 may be a transceiver, transceiver circuitry, or a communication interface, etc. The storage module 63 may be a memory.

[0244] When the processing module 61 is a processor, the communication module 62 is a transceiver, and the storage module 63 is a memory, the UE involved in this embodiment of the invention can be... Figure 3 The UE shown.

[0245] When dividing each function into modules according to its corresponding function. Figure 11 A schematic diagram of a possible composition of the base station involved in the above and embodiments is shown, such as... Figure 11 As shown, the base station may include: a detection unit 71 and a transmission unit 72.

[0246] Among them, the detection unit 71 is used to support the base station to perform Figure 4A Step 404 in the method shown, Figure 4B Step 404 in the method shown, Figure 4C Steps 404 and 406c in the method shown, Figure 4D Steps 404 and 406d in the method shown.

[0247] Transmission unit 72 is used to support base station execution Figure 4A Steps 401 and 405a in the method shown, Figure 4B Steps 401 and 405b in the method shown, Figure 4C Steps 401 and 407c in the method shown, Figure 4D Steps 401 and 407d in the method shown.

[0248] Furthermore, such as Figure 11 As shown, the base station may also include a receiving unit 73.

[0249] Receiving unit 73 is used to support base station execution. Figure 4A , 4B The operations received in the methods shown in 4C and 4D.

[0250] It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0251] The base station provided in this embodiment of the invention is used to execute the above-described link recovery method, and thus can achieve the same effect as the above-described link recovery method.

[0252] When using integrated units, Figure 12 A schematic diagram illustrating another possible configuration of the base station involved in the above embodiments is shown. For example... Figure 11 As shown, the terminal includes a processing module 81 and a communication module 82.

[0253] Processing module 81 is used to control and manage the actions of the base station, such as supporting the base station in performing operations. Figure 4A Step 404 in the method shown, Figure 4B Step 404 in the method shown, Figure 4C Steps 404 and 406c in the method shown, Figure 4D Steps 404 and 406d in the method shown.

[0254] Communication module 82 is used to support communication between the base station and other network entities, such as with... Figure 1 , Figure 3 , Figure 9 or Figure 10 The communication between functional modules or network entities shown herein. For example, communication module 82 is used to support base station execution. Figure 4A Steps 401 and 405a in the method shown, Figure 4B Steps 401 and 405b in the method shown, Figure 4C Steps 401 and 407c in the method shown, Figure 4D Steps 401 and 407d in the method shown. The base station may also include a storage module 83 for storing the base station's program code and data.

[0255] The processing module 81 may be a processor or a controller. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this invention. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0256] The communication module 82 can be a transceiver, transceiver circuit, or communication interface, etc. The storage module 83 can be a memory.

[0257] When the processing module 81 is a processor, the communication module 82 is a transceiver, and the storage module 83 is a memory, the terminal device involved in the embodiments of the present invention can be... Figure 2 The base station shown.

[0258] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0259] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0260] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0261] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0262] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiments of the present invention, essentially, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0263] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions within the technical scope disclosed in the present invention should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A link reconstruction method, characterized in that, include: When the user equipment (UE) detects that the first downlink beam pair set has failed, it sends a first uplink signal to the base station through the first uplink channel using the first uplink beam pair set at time n. The first uplink signal is used to notify the base station that the first downlink beam pair set has failed. At time n+k, the UE detects the first downlink signal sent by the base station through the first downlink channel using the second downlink beam set, and obtains a first detection result. The first downlink signal is used to confirm that the base station has received the first uplink signal. The first uplink signal is a beam failure report or a beam recovery request, and the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot. The UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam at time n+k, and obtains a first detection result, including: The UE performs blind detection on the downlink control channel at time n+k based on the second downlink beampair set to obtain the first detection result. The second downlink beampair set is a pre-configured beampair set for beam recovery, and the second downlink beampair set is different from the first downlink beampair set; or, The first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set; At time n+k, the UE performs blind detection on the downlink control channel based on the first target downlink beam pair set to obtain the first detection result, wherein the first target downlink beam pair set is different from the first downlink beam pair set.

2. The method according to claim 1, characterized in that, The first downlink signal is determined based on the content contained in the first uplink signal.

3. The method according to claim 1, characterized in that, When the first downlink signal is the downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot; When the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; The UE performs blind detection on the downlink control channel at time n+k based on the second downlink beam pair set to obtain the first detection result, including: The UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first detection result is the information of the target downlink beam pair set.

4. The method according to claim 1 or 2, characterized in that, The first uplink signal is a beam failure report or beam recovery request, and the first downlink signal is the downlink control channel NR-PDCCH; The UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam at time n+k, and obtains a first detection result, including: The UE obtains the first detection result at time n+k based on the detection of the downlink control channel, and the first detection result is information about the target downlink beam pair set.

5. The method according to claim 1 or 2, characterized in that, The first downlink signal is the downlink control channel, which includes configuration information of the first measurement pilot and uplink resource information for reporting the first detection result. The uplink resource information includes uplink time-frequency resources and / or information on the second uplink beampup set. After the UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k and obtains the first detection result, the method further includes: The UE sends the first detection result to the base station at time n+k+k1 based on the uplink resource information.

6. The method according to claim 5, characterized in that, After the UE sends the first detection result to the base station at time n+k+k1 based on the uplink resource information, the method further includes: The UE detects the third downlink channel at time n+k+k1+k2 and obtains information about the third downlink beam pair set. The UE communicates with the base station based on the information from the third downlink beam pair set.

7. The method according to claim 6, characterized in that, The UE detects the third downlink channel at time n+k+k1+k2 and obtains information about the third downlink beampair set, including: At time n+k+k1+k2, the UE performs blind detection on the third downlink channel based on the N optimal target downlink beam pairs in the target downlink beam pair set in the first detection result, so as to obtain information about the third downlink beam pair set.

8. The method according to claim 1, characterized in that, When the first downlink signal is the downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot; When the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; The UE performs blind detection on the downlink control channel at time n+k based on the first target downlink beam pair set to obtain the first detection result, including: The UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first detection result is the information of the second target downlink beam pair set.

9. The method according to claim 1 or 2, characterized in that, The first uplink signal is a beam failure report or a beam recovery request, and the first uplink signal includes information about a first target downlink beam pair set; the second downlink beam pair set is the first target downlink beam pair set; The first downlink signal is the downlink control channel NR-PDCCH; The UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam at time n+k, and obtains a first detection result, including: The UE obtains the first detection result based on the detection of the downlink control channel at time n+k, and the first detection result is the information of the second target downlink beam pair set.

10. The method according to claim 1, characterized in that, The first downlink signal includes information about the third downlink beampair set; After the UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k and obtains the first detection result, the method further includes: The UE communicates with the base station based on the information from the third downlink beam pair set.

11. The method according to claim 1 or 2, characterized in that, The first uplink signal is a beam failure report or a beam recovery request; After the user equipment (UE) detects a failure of the first downlink beam pair set and sends a first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n, the method further includes: The UE determines that it did not detect the first downlink signal at time n+k; At time n+k+k1, the UE retransmits the first uplink signal to the base station via the second uplink channel using the second uplink beam pair set.

12. The method according to claim 1 or 2, characterized in that, The first uplink signal is a beam failure report or a beam recovery request; After the user equipment (UE) detects a failure of the first downlink beam pair set and sends a first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n, the method further includes: The UE determines that it did not detect the first downlink signal at time n+k; At time n+k+k1, the UE retransmits the first uplink signal to the base station through the first uplink channel using the first uplink beam pair set. The transmission power used to transmit the first uplink signal at time n+k+k1 is increased by X compared to the transmission power used to transmit the first uplink signal at time n, where X is a preset power value.

13. The method according to claim 11, characterized in that, Also includes: The UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2, and obtains the first detection result.

14. The method according to claim 13, characterized in that, The first downlink signal is either the downlink control channel NR-PDCCH or the first measurement pilot; The UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2, and obtains the first detection result, including: The UE performs blind detection on the downlink control channel at time n+k+k1+k2 based on the second downlink beam pair set to obtain the first detection result. The second downlink beam pair set is a pre-configured beam pair set for beam recovery. The second downlink beam pair set is different from the first downlink beam pair set. The first downlink signal contains information indicating the target uplink beam pair set to the UE. The information of the target uplink beam pair set is obtained based on the second uplink beam pair set.

15. The method according to claim 14, characterized in that, When the first downlink signal is the downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot; When the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; The UE performs blind detection on the downlink control channel based on the second downlink beam pair set at time n+k+k1+k2 to obtain the first detection result, including: The UE measures the first measurement pilot according to the configuration information of the first measurement pilot to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first detection result is the information of the target downlink beam pair set.

16. The method according to claim 13, characterized in that, The first downlink signal is the downlink control channel NR-PDCCH; The UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2, and obtains the first detection result, including: The UE obtains the first detection result based on the detection of the downlink control channel at time n+k+k1+k2, and the first detection result is information about the target downlink beam pair set.

17. The method according to claim 15, characterized in that, The downlink control channel also includes uplink resource information for reporting the first detection result, and the uplink resource information includes uplink time-frequency resources and / or information on the third uplink beam pair set. After the UE detects the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2 and obtains the first detection result, the method further includes: The UE sends the first detection result to the base station at time n+k+k1+k2+k3 based on the uplink resource information.

18. The method according to claim 17, characterized in that, After the UE sends the first detection result to the base station at time n+k+k1+k2+k3 based on the uplink resource information, the method further includes: The UE detects the third downlink channel at time n+k+k1+k2+k3+k4 and obtains information about the third downlink beam pair set. The UE communicates with the base station based on the information from the third downlink beam pair set.

19. The method according to claim 18, characterized in that, The UE detects the third downlink channel at time n+k+k1+k2+k3+k4 and obtains information about the third downlink beampair set, including: At time n+k+k1+k2+k3+k4, the UE performs blind detection on the third downlink channel based on the N optimal target downlink beam pairs in the target downlink beam pair set in the first detection result, so as to obtain information about the third downlink beam pair set.

20. The method according to claim 1 or 2, characterized in that, The first uplink signal is a beam failure report or a beam recovery request, and the first uplink signal includes information about a first target downlink beam pair set; the second downlink beam pair set is the first target downlink beam pair set; After the user equipment (UE) detects a failure of the first downlink beam pair set and sends a first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n, the method further includes: The UE determines that it did not detect the first downlink signal at time n+k; At time n+k+k1, the UE retransmits the first uplink signal to the base station via the second uplink channel using the second uplink beam pair set.

21. A user equipment (UE), characterized in that, include: The transmitting unit is configured to transmit a first uplink signal to the base station at time n via the first uplink channel using the first uplink beam pair when the first downlink beam pair set is detected to be ineffective. The first uplink signal is used to notify the base station that the first downlink beam pair set is ineffective. The detection unit is used to detect the first downlink signal sent by the base station through the first downlink channel using the second downlink beam pair set at time n+k, and obtain a first detection result. The first downlink signal is used to confirm that the base station has received the first uplink signal. The first uplink signal is a beam failure report or a beam recovery request, and the first downlink signal is a downlink control channel NR-PDCCH or a first measurement pilot. The detection unit is specifically used for: At time n+k, blind detection is performed on the downlink control channel based on the second downlink beampair set to obtain the first detection result. The second downlink beampair set is a pre-configured beampair set for beam recovery, and the second downlink beampair set is different from the first downlink beampair set; or, The first uplink signal includes information about a first target downlink beampair set; the second downlink beampair set is the first target downlink beampair set; At time n+k, the UE performs blind detection on the downlink control channel based on the first target downlink beam pair set to obtain the first detection result, wherein the first target downlink beam pair set is different from the first downlink beam pair set.

22. The UE according to claim 21, characterized in that, The first downlink signal is determined based on the content contained in the first uplink signal.

23. The UE according to claim 21, characterized in that, When the first downlink signal is the downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot; When the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; The detection unit is specifically used for: Based on the configuration information of the first measurement pilot, the first measurement pilot is measured to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first detection result is information about the target downlink beam pair set.

24. The UE according to claim 21 or 22, characterized in that, The first uplink signal is a beam failure report or beam recovery request, and the first downlink signal is the downlink control channel NR-PDCCH; The detection unit is specifically used for: At time n+k, the first detection result is obtained based on the detection of the downlink control channel, and the first detection result is information about the target downlink beam pair set.

25. The UE according to claim 23, characterized in that, The first downlink signal is the downlink control channel, which includes configuration information of the first measurement pilot and uplink resource information for reporting the first detection result. The uplink resource information includes uplink time-frequency resources and / or information on the second uplink beam pair set. The sending unit is further configured to send the first detection result to the base station at time n+k+k1 based on the uplink resource information.

26. The UE according to claim 25, characterized in that, Also includes: Communication unit; The detection unit is also used to detect the third downlink channel at time n+k+k1+k2 to obtain information about the third downlink beam pair set; The communication unit is used to communicate with the base station based on the information of the third downlink beam set.

27. The UE according to claim 26, characterized in that, The detection unit is specifically used for: At time n+k+k1+k2, based on the N optimal target downlink beam pairs in the target downlink beam pair set in the first detection result, blind detection is performed on the third downlink channel to obtain information about the third downlink beam pair set.

28. The UE according to claim 21, characterized in that, When the first downlink signal is the downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot; When the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; The detection unit is specifically used for: Based on the configuration information of the first measurement pilot, the first measurement pilot is measured to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first detection result is the information of the second target downlink beam pair set.

29. The UE according to claim 21 or 22, characterized in that, The first uplink signal is a beam failure report or a beam recovery request, and the first uplink signal includes information about a first target downlink beam pair set; the second downlink beam pair set is the first target downlink beam pair set; The first downlink signal is the downlink control channel NR-PDCCH; The detection unit is specifically used for: At time n+k, the first detection result is obtained based on the detection of the downlink control channel, and the first detection result is the information of the second target downlink beam pair set.

30. The UE according to claim 26, characterized in that, The first downlink signal includes information about the third downlink beampair set; The communication unit is also used to communicate with the base station based on the information of the third downlink beam set.

31. The UE according to claim 21 or 22, characterized in that, The first uplink signal is a beam failure report or a beam recovery request; It also includes: determining the unit; The determining unit is used to determine that the first downlink signal was not detected at time n+k; The transmitting unit is further configured to retransmit the first uplink signal to the base station at time n+k+k1 using the second uplink beam pair set through the second uplink channel.

32. The UE according to claim 21 or 22, characterized in that, The first uplink signal is a beam failure report or a beam recovery request; It also includes: determining the unit; The determining unit is used to determine that the first downlink signal was not detected at time n+k; The transmitting unit is further configured to retransmit the first uplink signal to the base station via the first uplink channel using the first uplink beam pair set at time n+k+k1, wherein the transmission power used to transmit the first uplink signal at time n+k+k1 is increased by X compared to the transmission power used to transmit the first uplink signal at time n, where X is a preset power value.

33. The UE according to claim 31, characterized in that, The detection unit is further configured to detect the first downlink signal transmitted by the base station through the first downlink channel using the second downlink beam pair set at time n+k+k1+k2, and obtain the first detection result.

34. The UE according to claim 33, characterized in that, The first downlink signal is either the downlink control channel NR-PDCCH or the first measurement pilot; The detection unit is specifically used for: At time n+k+k1+k2, blind detection is performed on the downlink control channel based on the second downlink beam pair set to obtain the first detection result. The second downlink beam pair set is a pre-configured beam pair set for beam recovery. The second downlink beam pair set is different from the first downlink beam pair set. The first downlink signal contains information indicating the target uplink beam pair set to the UE. The information of the target uplink beam pair set is obtained based on the second uplink beam pair set.

35. The UE according to claim 34, characterized in that, When the first downlink signal is the downlink control channel, the downlink control channel contains the configuration information of the first measurement pilot; When the first downlink signal is the first measurement pilot, the configuration information of the first measurement pilot is pre-configured in the UE; The detection unit is specifically used for: Based on the configuration information of the first measurement pilot, the first measurement pilot is measured to obtain the first detection result. The first measurement pilot is a beam measurement pilot, and the first detection result is information about the target downlink beam pair set.

36. The UE according to claim 33, characterized in that, The first downlink signal is the downlink control channel NR-PDCCH; The detection unit is specifically used for: At time n+k+k1+k2, the first detection result is obtained based on the detection of the downlink control channel, and the first detection result is information about the target downlink beam pair set.

37. The UE according to claim 35, characterized in that, The downlink control channel also includes uplink resource information for reporting the first detection result, and the uplink resource information includes uplink time-frequency resources and / or information on the third uplink beam pair set. The sending unit is further configured to send the first detection result to the base station at time n+k+k1+k2+k3 based on the uplink resource information.

38. The UE according to claim 37, characterized in that, Also includes: Communication unit; The detection unit is also used to detect the third downlink channel at time n+k+k1+k2+k3+k4 to obtain information about the third downlink beam pair set. The communication unit is used to communicate with the base station based on the information of the third downlink beam set.

39. The UE according to claim 38, characterized in that, The detection unit is specifically used for: At time n+k+k1+k2+k3+k4, based on the N optimal target downlink beam pairs in the target downlink beam pair set in the first detection result, blind detection is performed on the third downlink channel to obtain information about the third downlink beam pair set.

40. The UE according to claim 39, characterized in that, The first uplink signal is a beam failure report or a beam recovery request, and the first uplink signal includes information about the first target downlink beam pair set; The second downlink beampair set is the first target downlink beampair set; It also includes: determining the unit; The determining unit is used to determine that the first downlink signal was not detected at time n+k; The transmitting unit is further configured to retransmit the first uplink signal to the base station at time n+k+k1 using the second uplink beam pair set through the second uplink channel.

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