WO2020192369A1

WO2020192369A1 - Beam failure processing method and device

Info

Publication number: WO2020192369A1
Application number: PCT/CN2020/077667
Authority: WO
Inventors: 管鹏; 张希; 樊波; 王晓娜
Original assignee: 华为技术有限公司
Priority date: 2019-03-26
Filing date: 2020-03-03
Publication date: 2020-10-01
Also published as: CN111757469B; CN111757469A

Abstract

A beam failure processing method and device, being used for dealing with the case where a beam failure occurs in a secondary carrier, facilitating the recovery of the failed beam of the secondary carrier. Said method comprises: a terminal sending, on a primary carrier, a first message to a network device, the first message being used to indicate a beam failure of a secondary carrier; and the terminal detecting, on the primary carrier and/or the secondary carrier, a second message sent by the network device, the second message being used to respond to the first message.

Description

Method and device for processing beam failure

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 201910231732.4, and the application name is "a method and device for processing beam failure" on March 26, 2019, the entire content of which is incorporated herein by reference Applying.

Technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to a method and device for processing beam failure.

Background technique

In a traditional cellular wireless communication system, a terminal can only send and receive data in one cell at a time. In order to provide the terminal with a higher transmission rate, carrier aggregation (CA) technology is introduced in the wireless communication system. CA technology means that the terminal can simultaneously transmit data on multiple carriers, thereby increasing the data transmission rate. Among them, the multiple carriers generally include one primary carrier and one or more secondary carriers. The cell working on the primary carrier is the primary cell (primary cell, PCell). The PCell is the cell when the terminal initially accesses it. The base station where the PCell is located is responsible for radio resource control (RRC) communication with the terminal. A cell working on a secondary carrier is a secondary cell (secondary cell, SCell), and the SCell can provide additional radio resources for the terminal.

At present, it is intended to increase the working frequency band supported by the communication system to above 6 GHz, up to approximately 100 GHz. The high frequency band has relatively abundant idle frequency resources, which can provide greater throughput for data transmission. The high frequency signal has a short wavelength. Compared with the low frequency band, it can arrange more antenna elements on the same size panel, and use beamforming technology to form a beam with stronger directivity and narrower lobes. However, in high-frequency communication, because the wavelength of the wireless signal is short, it is easier to block the signal propagation, which leads to the signal propagation terminal. The prior art introduces a beam failure recovery method, that is, the terminal monitors the beam failure detection reference signal issued by the base station at the physical layer, and evaluates whether the quality of the reference signal meets the beam failure trigger condition. Once the conditions are met, the terminal can send a beam failure recovery request to the base station. After receiving the beam failure recovery request, the base station determines a new candidate beam for transmission of control information or data.

However, the existing beam failure recovery method is for the primary carrier. If the secondary carrier has a beam failure, there is no processing method for the secondary carrier beam failure.

Summary of the invention

The embodiments of the present application provide a beam failure processing method and device, which are used to process the situation that the beam failure of the secondary carrier occurs, which is helpful to realize the recovery of the beam failure of the secondary carrier.

The specific technical solutions provided by the embodiments of this application are as follows:

In the first aspect, a method for processing beam failure is provided. The execution subject of the method is a terminal, and the method is implemented by the following steps. The terminal sends a first message to the network device on the primary carrier, where the first message is used to indicate that the beam of the secondary carrier fails, and the terminal detects the second message sent by the network device on the primary carrier and/or the secondary carrier , The second message is used to respond to the first message. The terminal sends a beam failure message on the secondary carrier to the network device on the primary carrier (it can also be regarded as sending a beam failure recovery request message), which helps to realize the beam failure recovery process on the secondary carrier. The terminal detects the response message (that is, the second message) sent by the network device on the primary carrier and the secondary carrier. When the response message is detected on the secondary carrier, it can speed up the beam failure recovery process. When the response message is detected on the primary carrier When the beam failure recovery request is sent successfully through retransmission, it is further helpful to ensure the reliability of the beam failure recovery process.

In a possible design, when the terminal detects the second message on the primary carrier, the second message carries information about the uplink resource for retransmitting the first message; or, when the terminal When the terminal detects the second message on the secondary carrier, the second message carries the information of the downlink resource. Through the design of the second message, when the first message is successfully sent, and the response message is received on the secondary carrier, the terminal can directly confirm and use the new beam, which helps reduce the delay. When the first message is not successfully sent, the terminal cannot receive the response message on the secondary carrier, but receives the response message on the primary carrier, and the network device schedules the retransmission through the primary carrier to improve the probability of successful sending of the first message.

In a possible design, the downlink resource is used to carry beam reconfiguration information.

In a possible design, the terminal detects the second message sent by the network device on the primary carrier according to the following method: the terminal detects on the primary carrier according to the first downlink control information DCI format The second message sent by the network device; wherein the first DCI format is a format used to indicate the DCI of the uplink resource. Through different formats, it is convenient for the terminal to better detect the second message on the primary carrier.

In a possible design, the terminal detects the second message sent by the network device on the secondary carrier according to the following method: the terminal detects the second message sent by the network device on the secondary carrier according to the second DCI format The second message; wherein the second DCI format is a format used to indicate the DCI of the downlink resource. Through different formats, it is convenient for the terminal to better detect the second message on the primary carrier.

In a possible design, the terminal detects the second message in a specific CORESET; the terminal detects the second message in a search space in a specific search space.

In a possible design, the terminal detects on a currently activated BWP of the primary carrier and/or secondary carrier.

The terminal detects on the indicated BWP of the primary carrier and/or secondary carrier.

In a possible design, the first message includes a first channel and a second channel. Optionally, there may be one or more second channels.

In a possible design, the first channel carries information about the beam failure event of the secondary carrier, and the second channel carries one or more of the following information: the identifier of the secondary carrier, the identifier of the failed beam, The frequency band to which the secondary carrier belongs, the new available beam, and the identification of the terminal. Through the design of the first message, more information can be carried, and the delay caused by multiple interactions between the network device and the terminal can be avoided. Through the design of the first channel and the second channel, partial retransmission becomes possible, thereby saving the overhead of uplink resources.

In a possible design, the transmit power difference between the first channel and the second channel is 0 dB. Through reasonable power control of the first channel and the second channel, keeping the power of the two channels consistent is beneficial to the network device to correctly receive the first message.

In a possible design, the first channel is a physical random access channel PRACH, and the second channel is a physical uplink shared channel PUSCH; or, the first channel is a physical uplink control channel PUCCH, and the second channel is a physical uplink control channel PUCCH. The channel is PUSCH; or, the first channel is PRACH, and the second channel is PUCCH.

In a possible design, multiple dedicated PRACHs can be reserved to associate multiple secondary carriers (Scells), one PRACH corresponds to one secondary carrier, and different PRACHs correspond to different secondary carriers. For example, the PRACH configuration index is associated with the Scell index to establish a one-to-one correspondence. In this way, the terminal can notify the network device of which secondary carrier has the beam failure by sending the PRACH, and the network device can know which secondary carrier has the beam failure by receiving the PRACH in the first message.

In a possible design, the second message carries first indication information, and the first indication information is used to indicate to retransmit part or all of the first message; or, the second message carries the first indication information. 2. Indication information, where the second indication information is used to indicate retransmission of the first channel or retransmission of the second channel. Through this method of retransmitting part of the message, the complexity and power consumption of the terminal can be further reduced, and the overhead and time delay of beam failure recovery can be reduced.

In a possible design, the second message carries third indication information, and the third indication information is used to indicate the format of the retransmission of the first channel or the format of the retransmission of the second channel.

In a possible design, the first message includes at least one of the following information: the beam failure event of the secondary carrier, the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, and the new The identification of the available beam and terminal.

In a possible design, the second message includes a third channel and a fourth channel.

In a possible design, the third channel is used to carry information indicating that the beam of the secondary carrier fails to recover successfully, or the third channel is used to carry information indicating that the first message is retransmitted; The fourth channel carries one or more of the following information: downlink resource information, uplink resource information for retransmitting the first message, power control related information for retransmitting the second channel, and terminal identification. Specifically, the combinations of information carried by the third channel and the fourth channel include the following: Method 1. The third channel is used to carry information indicating the success of the beam recovery of the secondary carrier, and the fourth channel is used to carry downlink resources. Information. Manner 2: The third information carries the information indicating the retransmission of the first message and/or the identification of the terminal, the fourth channel carries the information of the uplink resource for retransmission of the first message, and the power control related to the retransmission of the second channel Information and/or terminal identification. Through the design of the two channels of the second message, including the third channel and the fourth channel, the information carrying the downlink resources in the fourth channel can be used to indicate relevant information of beam reconfiguration, reducing the time for the terminal to use the default beam. The two channels can also carry more information, such as instructions for part or all of the retransmission, which can effectively reduce the delay and overhead of beam failure recovery.

In a possible design, the first message includes a first channel and the second channel.

In a possible design, the power control related information of the retransmission of the second channel is used to adjust the transmission power difference between the retransmission of the first channel and the retransmission of the second channel to 0 dB. Through reasonable power control of the third channel and the fourth channel, keeping the powers of the two channels consistent is beneficial to the terminal to correctly receive the second message.

In a possible design, the terminal, according to the power control related information of the retransmission of the second channel, when retransmitting the first message, the difference between the transmission power of the retransmission of the first channel and the transmission power of the retransmission of the second channel It is 0dB.

In a possible design, the terminal adjusts the power of the first channel to obtain the first intermediate power; the terminal adjusts the power of the second channel according to the power control related information of the retransmitted second channel to obtain the second Intermediate power; the terminal determines the transmit power for retransmitting the first channel and retransmitting the second channel according to the larger value of the first intermediate power and the second intermediate power, wherein the The transmit power difference between the first channel and the second channel is 0 dB.

In a second aspect, a method for processing beam failure is provided. The execution body of the method is a network device, and the method is implemented by the following steps. The network device receives a first message from the terminal, the first message is used to indicate that the beam of the secondary carrier fails; the network device sends a second message to the terminal on the primary carrier or the secondary carrier, and the second message is used for Respond to the first message. By receiving the beam failure message on the secondary carrier on the primary carrier (it can also be regarded as receiving the beam failure recovery request message), the beam failure recovery procedure on the secondary carrier is realized. The network device sends a response message (that is, the second message) on the secondary carrier to speed up the beam failure recovery process. When the network device sends a response message on the primary carrier, it can increase the probability that the beam failure recovery request is sent successfully through retransmission , Which further helps ensure the reliability of the beam failure recovery process.

In a possible design, when the network device sends a second message to the terminal on the primary carrier, the second message carries information about the uplink resource for retransmitting the first message; the network device should When the second message is sent to the terminal on the secondary carrier, the second message carries the information of the downlink resource. Through the design of the second message, when the first message is successfully sent, the response message is sent on the secondary carrier, and the terminal can directly confirm and use the new beam, which helps reduce the delay. When the first message is not successfully sent, the network device sends a response message on the primary carrier and schedules retransmission on the primary carrier to increase the probability of the first message being sent successfully.

In a possible design, the network device sending the second message to the terminal on the primary carrier includes:

The network device sends a second message to the terminal according to the first downlink control information DCI format on the primary carrier, where the first DCI format is a format used to indicate the DCI of the uplink resource. Through different formats, it is convenient for the terminal to better detect the second message on the primary carrier.

In a possible design, the network device sending the second message to the terminal on the secondary carrier includes:

The network device sends a second message to the terminal according to a second DCI format on the secondary carrier, where the second DCI format is a format used to indicate the DCI of the downlink resource.

In a possible design, the second message includes a third channel and a fourth channel. There may be one or more fourth channels. When there are multiple fourth channels, it means that the fourth channel is retransmitted multiple times.

In a possible design, the third channel is used to carry information indicating that the beam of the secondary carrier fails to recover successfully, or the third channel is used to carry information indicating that the first message is retransmitted; The fourth channel carries one or more of the following information: downlink resource information, uplink resource information for retransmitting the first message, power control related information for retransmitting the second channel, and terminal identification. Through the design of the two channels of the second message, including the third channel and the fourth channel, the information carrying the downlink resources in the fourth channel can be used to indicate relevant information of beam reconfiguration, reducing the time for the terminal to use the default beam. The two channels can also carry more information, such as instructions for part or all of the retransmission, which can effectively reduce the delay and overhead of beam failure recovery.

In a possible design, the third channel is used to indicate scheduling information of the fourth channel.

In a possible design, the third channel is a physical downlink control channel PDCCH, and the fourth channel is a physical downlink data channel PDSCH channel.

In a third aspect, a beam failure processing device is provided, and the device has the function of realizing any one of the possible designs of the first aspect and the first aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In one possible design, the device can be a chip or an integrated circuit.

In a possible design, the device includes a transceiver and a processor, the transceiver is used to communicate with other communication devices, and the processor is used to couple with the memory to execute the program stored in the memory. When the program is executed, the device can Perform the method described in the first aspect and any one of the possible designs of the first aspect.

In a possible design, the device also includes a memory for storing programs executed by the processor.

In one possible design, the device is a terminal.

In a fourth aspect, a beam failure processing device is provided, and the device has a function of realizing any one of the possible designs of the second aspect and the second aspect. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In one possible design, the device can be a chip or an integrated circuit.

In a possible design, the device includes a transceiver and a processor, the transceiver is used to communicate with other communication devices, and the processor is used to couple with the memory to execute the program stored in the memory. When the program is executed, the device can Perform the method described in any one of the possible designs of the second aspect and the second aspect.

In one possible design, the device is a network device.

In a fifth aspect, a chip is provided, the chip is connected to a memory or the chip includes a memory, and is used to read and execute software programs stored in the memory, so as to implement the above-mentioned first, second, and first aspects. The method described in any possible design of the second aspect or any possible design of the second aspect.

In a fifth aspect, a communication system is provided. The communication system includes a terminal and a network device. The terminal is used to perform the first aspect and any possible design method, and/or the network device is used to perform the second aspect. And any possible design method.

In a sixth aspect, a computer storage medium is provided, which stores a computer program, and the computer program includes instructions for executing the foregoing aspects and any possible design method in each aspect.

In a seventh aspect, a computer program product containing instructions is provided, which when running on a computer, causes the computer to execute the above-mentioned aspects and the methods described in any possible design of the aspects.

Description of the drawings

Figure 1 is one of the schematic diagrams of the communication system architecture in an embodiment of the application;

2 is the second schematic diagram of the communication system architecture in the embodiment of the application;

FIG. 3 is a schematic flowchart of a method for processing beam failure in an embodiment of the application;

4 is a schematic diagram of the structure of the first message in an embodiment of the application;

FIG. 5 is a schematic diagram of the structure of a second message in an embodiment of this application;

6 is a schematic diagram of a method for processing beam failure in an application scenario in an embodiment of this application;

FIG. 7 is a schematic diagram of a method for processing beam failure in another application scenario in an embodiment of the application;

FIG. 8 is a schematic diagram of a method for processing beam failure in another application scenario in an embodiment of this application;

FIG. 9 is one of the schematic structural diagrams of the device for processing beam failure in an embodiment of the application;

FIG. 10 is the second structural diagram of the device for processing beam failure in an embodiment of the application.

detailed description

The embodiments of the present application provide a beam failure processing method and device, which are used to perform beam failure recovery on a secondary carrier in a CA scenario. Among them, the method and the device are based on the same concept. Since the principles of the method and the device to solve the problem are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated. In the description of the embodiments of the present application, "and/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist at the same time. There are three cases of B. The character "/" generally indicates that the associated objects are in an "or" relationship. At least one involved in this application refers to one or more; multiple involved refers to two or more. In addition, it should be understood that in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating Or imply the order. In the description of the embodiments, the references to "first" and "second" may be interchanged. For example, the first message and the second message can exchange positions, which does not affect the essence of the solution of this application.

FIG. 1 shows the architecture of a possible communication system to which the beam failure processing method provided in an embodiment of the present application is applicable. Referring to FIG. 1, the communication system 100 includes: the communication system 100 includes: a network device 101 and a terminal 102.

The network device 101 is a device with a wireless transceiver function or a chip that can be installed in the device. The device includes but is not limited to: evolved Node B (eNB), radio network controller (RNC), Node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), the access point (AP), wireless relay node, wireless backhaul node, and transmission point (transmission and reception point, TRP or transmission) in the wireless fidelity (WIFI) system point, TP), etc., it can also be a gNB in a 5G (such as NR) system, or a transmission point (TRP or TP), one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or It can also be a network node that constitutes a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU).

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, DU implements wireless link The functions of radio link control (RLC), media access control (MAC) and physical (PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer (that is, sent through the PHY layer), or converted from the information of the PHY layer, in this architecture, high-level signaling, such as RRC layer signaling or PDCP layer signaling can also be considered to be sent by DU, or sent by DU+RU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in the access network RAN, and the CU can also be divided into network equipment in the core network CN, which is not limited here.

The terminal can also be called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal equipment, wireless communication equipment, user Agent or user device. The terminal in the embodiment of this application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal device , Wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation safety (transportation) Wireless terminals in safety), wireless terminals in smart cities, and wireless terminals in smart homes. The embodiment of this application does not limit the application scenario. In this application, a terminal with a wireless transceiver function and a chip that can be installed in the aforementioned terminal are collectively referred to as a terminal.

The cell handover method provided in the embodiments of this application can be applied to various communication systems, such as: long term evolution (LTE) system, worldwide interoperability for microwave access (WiMAX) communication system, fifth Generation (5th Generation, 5G) systems, such as new-generation radio access technology (NR), and future communication systems, such as 6G systems.

It should be noted that the network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those of ordinary skill in the art It can be seen that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

The beam failure processing method and device provided by the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

To facilitate understanding, first introduce the basic concepts of some terms used in this application.

1) First introduce the concept of carrier aggregation.

Carrier aggregation means that a network device configures multiple carriers for a terminal, and the terminal and the network device use multiple carriers for data transmission. The multiple carriers generally include a primary carrier component (PCC) and one or more secondary carrier components (SCC). The cell working on the primary carrier is the PCell, which is the cell when the terminal initially accesses it, and the base station where the PCell is located is responsible for RRC communication with the terminal. The cell working on the secondary carrier is the SCell, and the SCell can provide additional radio resources for the terminal. PCC is always activated, SCC can be activated through PCC or activated SCC. The initial state of the SCC configured by the network device for the terminal is the deactivated state.

The terminal and network equipment exchange data on the primary carrier, that is, the terminal and network equipment exchange data in the primary cell; the terminal and network equipment exchange data on the secondary carrier, that is, the terminal and network equipment exchange data in the secondary cell.

2) The concept of beam is introduced below.

A beam is a strong directional signal sent by a terminal or network device by means of beam domain communication. Beam-domain communication refers to the weighting of signals on different elements of linear or area array antennas, and the use of interference principles to form beams, so that the signals are enhanced in a specified direction and weakened in other directions. In this way, terminals in different directions Or network equipment can perform space division multiplexing to increase system capacity.

Based on the system architecture shown in Figure 1, taking the 5G NR system as an example, the 5G NR system mainly beamforming signals through an antenna array to achieve precise narrow beams to provide services for user data. In a beam application scenario, an example of a possible communication system architecture is shown in FIG. 2. The communication system 200 includes a network device 201 and a terminal 202. The definition and explanation of the network device 201 and the terminal 202 are as described above.

The 5G communication system will adopt a higher carrier frequency (generally greater than 6GHz), such as 28GHz, 38GHz, or 72GHz frequency bands, to achieve greater bandwidth and higher than the long term evolution (LTE). Transmission rate of wireless communication. Due to the high carrier frequency, the wireless signal transmitted by it experiences more severe fading during the space propagation process, and it is even difficult to detect the wireless signal at the receiving end. For this reason, beamforming (BF) technology will be used in 5G communication systems to obtain beams with good directivity, so as to increase the power in the transmitting direction and improve the signal to interference plus noise ratio at the receiving end. ,SINR). In order to increase coverage and control the cost of antenna arrays, hybrid beamforming (HBF) technology has become the best choice, which includes both analog beamforming (analogy beamforming, ABF) and digital beamforming (digital beamforming, DBF) ). Among them, DBF is similar to multi-input multi-output (MIMO) in LTE, while ABF adjusts the direction of the analog beam by changing the weights between elements in the antenna array. To further improve communication quality, the terminal will also use beamforming technology to generate analog beams in different directions for receiving and sending data. Both the network device 201 and the terminal 202 use narrower analog beams for communication, so only when the analog beams used for transmission and reception are aligned can better communication quality be obtained. Therefore, in the 3GPP RAN1 meeting, it has been determined that 5G NR will use a beam sweeping process to determine the beam pair (transmit beam and receive beam) between the network device and the terminal, as shown in Figure 2. In addition, multiple beam pairs are monitored during the communication process to improve the robustness of the communication link. In addition, in order to increase cell coverage, a 5G NR cell may contain multiple TRPs, and each TRP may transmit multiple different analog beams.

The basic idea of the embodiments of the present application is that in the application scenario of carrier aggregation, when a beam failure occurs on the secondary carrier, the primary carrier is used to help complete the beam failure recovery (BFR) of the secondary carrier. Among them, BFR is also called link recovery procedures (link recovery procedures) in the physical layer protocol. Optionally, in the embodiment of the present application, in the application scenario of carrier aggregation, the frequency band where the primary carrier is located is a low frequency band, and the frequency band where the secondary carrier is located is a high frequency band, and the network equipment only uses beamforming technology to communicate on the secondary carrier.

As shown in FIG. 3, the specific process of the beam failure processing method provided by the embodiment of the present application is as follows.

S301. The terminal sends a first message to the network device on the primary carrier, and the network device receives the first message from the terminal.

Wherein, the first message is used to indicate that the beam of the secondary carrier fails. Alternatively, the first message is used to request beam failure recovery, for example, the first message is a beam failure recovery request (BFRQ) message.

The content carried in the first message may include any one or a combination of the following: the beam failure event of the secondary carrier, the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, the new available beam and the terminal Logo. Wherein, the beam failure event of the secondary carrier describes the beam failure of the secondary carrier. For example, the method for the terminal to determine that the beam failure occurs may include: the terminal determines that the beam quality on the secondary carrier is lower than the set threshold, or the instance reaches The set number of times, or the time below the set threshold reaches the set time. Among them, the beam quality can also be called radio link quality (radio link quality). The identifier of the secondary carrier may be any information used to identify the secondary carrier, such as a secondary carrier identifier (identifier, ID). Similarly, the identifier of the failed beam may be any information used to identify the secondary carrier, such as a beam ID. The identification of the terminal may be any information used to identify the terminal, such as a terminal ID. The frequency band to which the secondary carrier belongs may include at least two of the frequency domain start position, end position, and bandwidth of the secondary carrier. The new available beam can also be indicated by the beam ID.

Depending on the content included in the first message, the terminal can send the first message at once or send the first message multiple times, for example, sending the first message twice, that is, sending part of the first message for the first time. Send another part of the first message for the second time. An optional implementation manner is that the terminal sends a part of the content in the first message to the network device, including the beam failure event of the secondary carrier. The terminal sends another part of the content of the first message according to the uplink resource scheduled by the network device or on the pre-allocated uplink resource, including the new available beam. The identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, and the identifier of the terminal may be carried in a part of the content of the first message, or may be carried in another part of the content of the first message.

In this application, the manner in which the terminal detects the beam failure of the secondary carrier may not be limited. For example, the terminal's beam failure detection on the secondary carrier may be performed based on the beam failure detection reference signal (BFD RS). The terminal periodically detects the BFD RS at the physical layer. If the BFD RS satisfies the condition of the beam failure instance (beam failure instant), the terminal physical layer sends a beam failure instance indication (beam failure instance) to the higher layer. If there are N consecutive instances of beam failure, the terminal upper layer determines that the beam failure has occurred. The value of N is specified in the agreement. The condition of the beam failure instance can be set as that the beam quality is lower than the set beam failure threshold.

The foregoing is only an example of the manner in which the terminal detects the failure of the secondary carrier beam, and this application may also apply any method in the prior art to determine the failure of the secondary carrier beam.

Optionally, the terminal may also select a new available beam when determining that the secondary carrier beam fails. For example, when the terminal upper layer determines that a beam failure occurs, the terminal upper layer will request the terminal physical layer to send it a candidate beam that meets the condition. The terminal physical layer selects the candidate beam that meets the condition from the set of candidate beams and sends it to the terminal upper layer . Among them, the candidate beam set is configured to the terminal by the network device. The met condition may be that the beam quality is higher than a set candidate beam quality threshold.

S302. The network device sends a second message to the terminal on the primary carrier and/or the secondary carrier, and the terminal detects the second message sent by the network device on the primary carrier and/or the secondary carrier.

Among them, the second message is used to respond to the first message. It should be noted here that although the second message sent on the primary carrier and the secondary carrier is called the second message, in fact, the second message sent by the network device on the primary carrier and the second message sent on the secondary carrier carry The content is different. For ease of description, the messages used to respond to the first message are collectively referred to as the second message.

Specifically, the network device may choose to send the second message on the primary carrier, or choose to send the second message on the secondary carrier. Of course, it is also possible to send the second message on both the primary carrier and the secondary carrier. In an optional implementation manner, the network device selects whether to send the second message on the primary carrier or on the secondary carrier according to the receiving situation of the first message. For example, if the network device correctly receives the first message from the terminal in S301, the network device sends the second message carrying the information of the downlink resource to the terminal on the secondary carrier. Wherein, correctly receiving the first message includes correctly parsing the first message, and the first message carries a new available beam. The network device can determine that the beam of the secondary carrier fails according to the first message, and determines the new available beam selected by the terminal, then the network device directly sends the second message on the secondary carrier, and the terminal receives the second message on the secondary carrier through the new available beam. The message, if received correctly, indicates that the new available beam can work on the secondary carrier, which helps to speed up the process of secondary carrier beam failure recovery. The downlink resource carried in the second message sent by the secondary carrier by the network device is used to transmit beam reconfiguration related information, and the terminal receives information on the downlink resource according to the downlink resource information carried in the second message received on the secondary carrier Beam reconfiguration related information, thereby completing the beam failure recovery process of the secondary carrier.

For another example, if the network device does not correctly receive the first message from the terminal in S301, the network device needs to convey an instruction to retransmit the first message to the terminal. The network device sends the second message to the terminal and carries the uplink resource information for retransmitting the first message. The terminal retransmits the first message on the uplink resource according to the uplink resource information carried in the second message received on the primary carrier.

Since the terminal does not know whether the network device sends the second message on the primary carrier or the secondary carrier, that is, the response of the first message, the terminal needs to perform detection on both the primary carrier and the secondary carrier after sending the first message. If the second message is detected on the primary carrier, the terminal retransmits the first message; if the second message is detected on the secondary carrier, the terminal completes the beam failure recovery of the secondary carrier according to the content of the downlink resource in the second message Process.

Optionally, the terminal may detect the second message in a specific CORESET, or detect the second message in a specific search space (search space).

In addition, the main carrier may include one or more bandwidth parts (BWP). When the terminal detects the second message on the main carrier, it can detect it on a certain BWP currently activated by the main carrier. Similarly, the secondary carrier may include one or more BWPs, and when the terminal detects the second message on the secondary carrier, it can detect on a certain BWP currently activated on the secondary carrier.

In actual applications, the downlink control information (DCI) format used by the network device to send the second message on the primary carrier and the secondary carrier is different. The network device sends the second message in the first DCI format on the primary carrier, and sends the second message in the second DCI format on the secondary carrier. The DCI of the first DCI format is the DCI used for scheduling uplink transmission. Specifically, the DCI of the first DCI format may be used to indicate uplink resources, and the uplink resources are used for the terminal to retransmit the first message, and optionally the first message is retransmitted. Part or all of. The DCI of the first DCI format is the DCI that triggers beam management of the secondary carrier. The DCI in the second DCI format is used for scheduling downlink transmission. Specifically, the DCI in the second DCI format may be used to indicate downlink resources. For example, the downlink resources may be used to transmit beam reconfiguration information. Wherein, the beam reconfiguration information may include beams for reconfiguration of uplink/downlink physical signals/channels. For example, it includes one or more of the following: reconfiguration of the beam indication of the uplink control channel; reconfiguration of the beam indication of the downlink control channel; reconfiguration of the available beam transceiver control interface (transceiver control interface, TCI) set; reconfiguration of the available beam The spatialrealtion collection. Of course, the second message sent on the primary carrier and the secondary carrier carries different content. When detecting, the terminal detects the second message sent by the network device according to the first DCI format on the primary carrier. The terminal detects the second message sent by the network device according to the second DCI format on the secondary carrier.

For example, in accordance with the existing protocol 3GPP TS 38.212 V15.4.0 on the DCI format, the second message on the primary carrier can adopt DCI format 0_0 or DCI format 0_1, and the second message on the secondary carrier can adopt DCI format 1_0 or adopt DCI format 1_1. The network device sends the second message on the primary carrier according to DCI format 0_0 or DCI format 0_1, and sends the second message on the secondary carrier according to DCI format 1_0 or DCI format 1_1. The terminal receives the second message on the primary carrier according to DCI format 0_0 or DCI format 0_1, and receives the second message on the secondary carrier according to DCI format 1_0 or DCI format 1_1. Of course, the embodiment of the present application can also add a new DCI format to be applied to transmission on the primary carrier and the secondary carrier.

On the other hand, the frequency domain positions occupied by the primary carrier and the secondary carrier are different, and the terminal detects the second message on the primary carrier and the secondary carrier according to different frequency domain positions. The frequency domain position includes at least two of the frequency domain start position, end position, and bandwidth. Optionally, in this application, the primary carrier occupies the low frequency, and the auxiliary carrier occupies the high frequency. In addition, the terminal receives the second message on the primary carrier and the secondary carrier according to different antenna ports quasi-co-loacted (QCL). The terminal receives the second message on the primary carrier according to the QCL of the primary carrier control channel, for example, omnidirectional reception. The terminal receives the second message on the secondary carrier according to the QCL of the secondary carrier control channel, for example, the newly available beam reception. Optionally, the terminal detects the second message on the primary carrier and the secondary carrier, and can also detect the second message according to the following different parameters: different scrambling methods; different cyclic redundancy check (CRC) methods; terminal The identifier (UE ID) is different, such as different RNTI.

After the network device correctly receives the retransmitted first message, it reconfigures the beam of the secondary carrier for the terminal. This application does not limit the method of how to reconfigure the beam of the secondary carrier after receiving the retransmitted first message. For example, the related information of the reconfiguration beam may be sent on the primary carrier, and the related information of the reconfiguration beam may also be sent on the secondary carrier. For example, radio resource control (Radio Resource Control, RRC) signaling may be used to carry reconfiguration beam-related information, and a media access layer control element (MAC control element, MAC CE) may also be used to carry reconfiguration beam-related information.

With the method provided above, the terminal sends a beam failure message on the secondary carrier to the network device on the primary carrier (it can also be regarded as sending a beam failure recovery request message) to realize the beam failure recovery process on the secondary carrier. The terminal detects the response message sent by the network device on the primary carrier and the secondary carrier (ie, the second message above). When the response message is detected on the secondary carrier, it can speed up the beam failure recovery process. When detecting on the primary carrier When the response message is received, the probability that the beam failure recovery request is sent successfully can be increased through retransmission, which further helps to ensure the reliability of the success of the beam failure recovery process.

The first message and the second message in the embodiment of the present application may be constructed according to a conventional message, or may be constructed according to the following design. The following introduces some possible designs for the first message and the second message in the embodiments of this application.

The first message may also be called message A (msg.A), and the second message may also be called message B (msg.B). The first message may include two channels, denoted as the first channel and the second channel. The content of the first message sent by the terminal to the network device may be carried through the first channel and the second channel. The first channel carries a part of the first message content, and the second channel carries another part of the first message content. Which parts to bear can be designed arbitrarily. For example, the first channel carries information about the beam failure event of the secondary carrier; the second channel carries one or more of the following information: the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, the new available beam, and The identification of the terminal may also carry the BWP information of the failed secondary carrier. There may be one or more second channels, and multiple second channels means that the content of the second channel is repeatedly sent multiple times.

Under this configuration, if the first channel and the second channel have reference signals, they will be used in common for the demodulation and estimation functions of the two channels. In addition, in order to further facilitate the reception of the first message by the network device, the transmission power difference between the first channel and the second channel is 0 dB. Specifically, the network device configures the terminal or defines the transmit power difference between the first channel and the second channel through a protocol, and the power difference can be set to 0 dB. When transmitting the first channel and the second channel, the terminal needs to keep the power difference constant and try to keep it at 0dB. Of course, in practical applications, the power difference allows a certain range of error, such as ±0.01dB, or ±0.02dB.

As shown in Figure 4, the first channel is a physical random access channel (PRACH), and the second channel is a physical uplink shared channel (PUSCH). The PRACH may be used to carry the beam failure event information of the secondary carrier. For example, a dedicated PRACH is reserved as this function, where the PRACH is identified by a PRACH configuration index. In a possible design, multiple dedicated PRACHs can be reserved to associate multiple secondary carriers (Scells), one PRACH corresponds to one secondary carrier, and different PRACHs correspond to different secondary carriers. For example, the PRACH configuration index is associated with the Scell index to establish a one-to-one correspondence. In this way, the terminal can notify the network device of which secondary carrier has the beam failure by sending the PRACH, and the network device can learn which secondary carrier has the beam failure by receiving the PRACH in the first message.

The PUSCH can be used to carry other information in the first message. Optionally, if the dedicated PRACH function is not reserved as a notification of the beam failure of the secondary carrier, the PUSCH may also be used to display the information of the beam failure event that carries the secondary carrier.

When the first message includes PRACH and PUSCH, PRACH and PUSCH are jointly used to carry the content of the first message. In this case, the PUSCH reference signal and PRACH are jointly used for PRACH estimation and PUSCH demodulation. Wherein, the reference signal of the PUSCH is a demodulation reference symbol (DMRS), and it can also be demodulated by combining DMRS with a phase tracking reference signal (PTRS). As mentioned above, through reasonable power control, it is ensured that the power difference between the PRACH and PUSCH transmitted by the terminal is constant, which is 0 dB. Further, in order to improve the probability of correct demodulation of PUSCH, PUSCH, DMRS (and/or PTRS) are configured with the highest robustness, for example, PUSCH (modulation and coding scheme, MCS) is the lowest, DMRS density is the highest or the transmission power is the highest. . Taking the first channel PRACH and the second channel being PUSCH as an example, the combination of DMRS and RTRS for demodulation in FIG. 4 is taken as an example. Figure 4 shows an optional frame structure design. The first few symbols of a frame are used for downlink control channel transmission, and the remaining symbols are used for uplink transmission.

Of course, the first channel and the second channel may also have other combinations. For example, the first channel is PUCCH and the second channel is PUSCH. Or, the first channel is PRACH, and the second channel is PUCCH.

Similarly, the second message returned by the network device to the terminal may also include two channels, such as the third channel and the fourth channel. The content of the second message returned by the network device to the terminal may be carried through the third channel and the fourth channel. The third channel carries a part of the content of the second message, and the fourth channel carries another part of the content of the second message. Which parts to bear can be designed arbitrarily. For example, the third channel carries information indicating that the beam of the secondary carrier fails to recover successfully, or the third channel carries information indicating that the first message is retransmitted. The fourth channel carries other information in the second message. For example, the fourth channel carries one or more of the following information: downlink resource information, uplink resource information for retransmission of the first message, power control related to retransmission of the second channel Information and identification of the terminal. Specifically, in conjunction with the description of the foregoing embodiment, when the network device correctly receives the first message, it sends a second message on the secondary carrier, and carries information on the third channel indicating that the beam of the secondary carrier fails to recover successfully. The information of the uplink and downlink resources and the identification of the terminal. When the network device does not correctly receive the first message, it sends a second message on the primary carrier, wherein the third channel carries information indicating the retransmission of the first message, and the fourth channel carries the information indicating the retransmission of the first message. Uplink resource information, power control related information for retransmission of the second channel, and terminal identification. There may be one or more fourth channels, and multiple fourth channels means that the content of the second channel is repeatedly sent multiple times.

The design of demodulation and power control for the third channel and the fourth channel can refer to the design of the first channel and the second channel. Taking the third channel PDCCH and the fourth channel being the PDSCH as an example, as shown in FIG. 5, the DMRS of the PDSCH and the DMRS of the PDCCH are jointly used for the demodulation of the PDCCH and the PDSCH. Similarly, DMRS can be combined with PTRS for demodulation. Figure 5 also shows an optional frame structure design. The first few symbols of a frame are used for downlink control channel transmission, and the resources for receiving the downlink control channel include control resources dedicated to receiving the first message. Set (control resource set, coreset), for example, the first message is a beam failure recovery (BFR) request, and the resource set included in the downlink control channel may be referred to as BFR-coreset. The relationship between the coreset and the third channel PDCCH is that the PDCCH is carried on the coreset, one cell or one carrier can be configured with one or more coresets, and each coreset refers to a section of possible time-frequency resources for transmitting the PDCCH. The reason for defining the coreset is to reduce the complexity of searching for PDCCH by the terminal. The design shown in Figure 5 is just an example. The method of this application can be applied to other scenarios where two channels are combined.

Similar to the design of the first channel and the second channel, in order to improve robustness, the PDCCH and PDSCH are designed. For example, the PDCCH uses the largest aggregation level and the PDSCH uses the lowest MCS.

Similarly, in order to facilitate the terminal to receive the second message, the difference in transmit power between the third channel and the fourth channel is 0 dB. Of course, in practical applications, the power difference allows a certain range of error, for example, ±0.01dB, or ±0.02dB.

For example, the third channel is a physical downlink control channel (physical downlink control channel, PDCCH), and the fourth channel is a physical downlink shared channel (physical downlink shared channel, PDSCH). The PDCCH may also carry information for scheduling PDSCH. The PDSCH may carry downlink resource information, and the downlink resource is a resource for transmitting reconfiguration beam information. If the PDSCH indicates to retransmit the first message, it may further carry power control related information about retransmitting the first channel and the second channel. In order to ensure that when the terminal retransmits the first message, the power difference between the first channel and the second channel is constant, that is, 0dB, the PDSCH can carry power control related information for retransmitting the second channel, then the terminal is retransmitting the first message At this time, the power of transmitting the first channel (PRACH) can refer to the power of the second channel (PUSCH). The power for transmitting the PUSCH is determined according to the power control related information of the retransmission of the second channel carried in the PDSCH, for example, transmission power control (TPC) information. In another possible design, the PDSCH carries the power control related information of the retransmission second channel (PUSCH), and the terminal adjusts the power of the first channel to obtain the first intermediate power; the terminal retransmits the power control related information of the second channel , Adjust the power of the second channel to obtain the second intermediate power; the terminal determines the transmit power of the retransmission of the first channel and the retransmission of the second channel according to the larger value of the first intermediate power and the second intermediate power. The transmission power difference between the first channel and the second channel is 0dB. The transmission power of the retransmitted first channel and the retransmitted second channel may be adjusted to the larger value. Specifically, it can be adjusted by adding an adjustment factor (scaling factor).

On the basis of this structural design of the first message, if the network device does not receive the first message correctly, it may include the cases where the first channel is not received, the second channel is not received, and the first channel and the second channel are all correctly received. . The reception here includes all reception and correct analysis. In view of this, the second message sent by the network device to the terminal may be designed for the case of receiving the first message.

The second message may also carry indication information, such as the first indication information, which is used to indicate part or all of the first message to be retransmitted. For example, 1 is used to indicate the retransmission of all of the first message, and 0 is used. To indicate the retransmission of the first message. When retransmitting part of the first message, the first channel or the second channel for retransmitting the first message can be defined. For example, if the network device receives the PRACH correctly but does not receive the PUSCH correctly, the network device only knows that a beam failure has occurred on the secondary carrier, but does not know information such as the new available beam, the network device can indicate to the terminal through the first indication information The PUSCH is retransmitted, and the terminal only retransmits the second channel when retransmitting the first message according to the first indication information. This helps to save overhead and reduce time delay. The first indication information here is 1 bit, of course, it can also occupy multiple bits to carry more information. The second message may also indicate other information, for example, it is recorded as second indication information, and the second indication information may be used to indicate the format of retransmission of the second channel. Assume that the second channel is PUSCH. The terminal determines the format for retransmitting the PUSCH according to the second indication information in the second message, and retransmits the PUSCH according to the format.

Through this method of retransmitting part of the message, the complexity and power consumption of the terminal can be further reduced, and the overhead and time delay of beam failure recovery can be reduced.

Optionally, the first message includes one of the first channel or the second channel, and the second message includes one of the third channel or the fourth channel.

In this application, compared to the method of first notifying the failure and then scheduling the uplink resource to transmit other information by the network device, the design of the first message can carry more information, which can avoid the time caused by multiple interactions between the network device and the terminal. Extension. By separating two channels, including the first channel and the second channel, partial retransmission becomes possible, thereby saving the overhead of uplink resources. Through the design of the second message, when the first message is successfully sent, and the response message is received on the secondary carrier, the terminal can directly confirm and use the new beam, which helps reduce the delay. When the first message is not successfully sent, the terminal cannot receive the response message on the secondary carrier, but receives the response message on the primary carrier, and the network device schedules the retransmission through the primary carrier to improve the probability of successful sending of the first message. Through the design of two channels of the second message, including the third channel and the fourth channel, the fourth channel carries relevant information of beam reconfiguration, reducing the time for the terminal to use the default beam. The two channels can also carry more information, such as instructions for part or all of the retransmission, which can effectively reduce the delay and overhead of beam failure recovery. Through reasonable power control of the first channel and the second channel, the power of the two channels is kept consistent, which is conducive to the correct reception of the first message by the network equipment. Through the reasonable power control of the third channel and the fourth channel, the two channels are maintained. The power of the two channels is consistent, which is beneficial to the terminal to correctly receive the second message.

Based on the description of the foregoing embodiment, the following further describes in detail through specific application scenarios.

The communication parties are network equipment and terminals. The network equipment can transmit on the primary carrier and the secondary carrier, and the terminal can also transmit on the primary carrier and the secondary carrier.

As shown in Figure 6, the primary carrier is omni-directional transmission and reception, and the secondary carrier is beam transmission. The process of beam failure recovery is that the terminal performs beam failure detection on the secondary carrier, determines that the beam on the secondary carrier fails, and discovers new available beams, which can be one or more. The terminal notifies the primary cell (PCell) of the failure of the secondary carrier beam and notifies the new available beam. When the network device sends a response message on the PCell or SCell, the terminal detects the response message on both the PCell and the SCell, and according to the detected response message, retransmits the failure message of the secondary carrier beam, or determines that the secondary carrier beam is restored successfully. The network device sends the reconfiguration message of the secondary carrier beam on the PCell or SCell.

As shown in Fig. 7, on the basis of Fig. 6, the terminal can also report to the network device twice. The terminal notifies the primary cell (PCell) of the failure of the secondary carrier beam, the PCell schedules uplink resources to the terminal, and the terminal reports the new available beam on the resources scheduled by the PCell.

Based on the message structures of Msg.A and Msg.B shown in Figures 4 and 5, when retransmission is instructed, part of Msg.A can be transmitted, for example, only PUSCH can be transmitted. As shown in Figure 8, the terminal sends Msg.A to the network device, the network device returns Msg.B to the terminal, and the terminal determines the part to retransmit Msg.A according to Msg.B. The terminal retransmits part of Msg.A to the network device, for example, only the PUSCH is retransmitted. The network device returns Msg.B to the terminal, and the terminal receives Msg.B from the network device. End the beam failure recovery process.

Based on the same concept of the foregoing method embodiment, as shown in FIG. 9, an embodiment of the present application further provides a beam failure processing apparatus 900. The beam failure processing apparatus 900 has the functions performed by the terminal or network device in the foregoing method embodiment. The function of the operation. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the device 900 for processing beam failure includes a processing unit 901 and a communication unit 902. The communication unit 902 is configured to perform the sending and/or receiving steps in the method embodiment. The processing unit 901 is used to perform other steps except sending and receiving. Further, the communication unit 902 may include a sending unit and/or a receiving unit.

The device 900 for processing beam failure may be a terminal, or a chip or a functional module inside the terminal. When the device 900 for processing beam failure is used to perform operations performed by the terminal in the foregoing method embodiment:

The communication unit 902 is configured to send a first message to the network device on the primary carrier, where the first message is used to indicate that the beam of the secondary carrier fails;

The processing unit 901 is configured to detect a second message sent by a network device on the primary carrier and/or the secondary carrier, where the second message is used to respond to the first message.

Optionally, when the second message is detected on the primary carrier, the second message carries information about the uplink resource for retransmitting the first message;

When the second message is detected on the secondary carrier, the second message carries information about downlink resources.

Optionally, the second message sent by the network device is detected according to the first downlink control information DCI format on the primary carrier; wherein, the first DCI format is a format used to indicate the DCI of the uplink resource.

Optionally, the processing unit 901 is configured to: detect a second message sent by a network device according to a second DCI format on the secondary carrier; wherein, the second DCI format is used to indicate the DCI of the downlink resource format.

Optionally, the first message includes a first channel and a second channel.

Optionally, the first channel carries information about the beam failure event of the secondary carrier;

The second channel carries one or more of the following information: the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, the new available beam, and the identifier of the terminal.

Optionally, the transmit power difference between the first channel and the second channel is 0 dB.

Optionally, the first channel is a physical random access channel PRACH, and the second channel is a physical uplink shared channel PUSCH; or,

The first channel is the physical uplink control channel PUCCH, and the second channel is the PUSCH; or,

The first channel is PRACH, and the second channel is PUCCH.

Optionally, the second message carries first indication information, and the first indication information is used to indicate retransmission of part or all of the first message; or,

The second message carries second indication information, and the second indication information is used to indicate retransmission of the first channel or retransmission of the second channel.

Optionally, the first message includes at least one of the following information:

The beam failure event of the secondary carrier, the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, the new available beam, and the identifier of the terminal.

The device 900 for processing beam failure may be a network device, or a chip or functional module inside the network device. When the device 900 for processing beam failure is used to perform operations performed by the network device in the foregoing method embodiment, the processing unit 901 Used to schedule the communication unit 902 to communicate with other devices. specific:

The communication unit 902 is configured to receive a first message from the terminal, where the first message is used to indicate that the beam of the secondary carrier fails;

And for sending a second message to the terminal on the primary carrier or the secondary carrier, the second message is used to respond to the first message.

Optionally, when the communication unit 902 sends a second message to the terminal on the primary carrier, the second message carries information about the uplink resource for retransmitting the first message;

When the communication unit 902 sends a second message to the terminal on the secondary carrier, the second message carries information about the downlink resource.

Optionally, the processing unit 901 is configured to send a second message to the terminal according to the first downlink control information DCI format on the primary carrier, where the first DCI format is used to indicate the uplink resource The format of DCI.

The processing unit 901 is configured to send a second message to the terminal according to a second DCI format on the secondary carrier, where the second DCI format is a format used to indicate the DCI of the downlink resource.

Optionally, the second message includes a third channel and a fourth channel.

Optionally, the third channel is used to carry information indicating that the beam failure recovery of the secondary carrier is successful, or the third channel is used to carry information indicating that the first message is retransmitted;

The fourth channel carries one or more of the following information: downlink resource information, uplink resource information for retransmitting the first message, power control related information for retransmitting the second channel, and terminal identification.

Optionally, the power control related information of the retransmission of the second channel is used to adjust the transmission power difference between the retransmission of the first channel and the retransmission of the second channel to 0 dB.

Optionally, the third channel is a physical downlink control channel PDCCH, and the fourth channel is a physical downlink data channel PDSCH channel.

It is understandable that the processing unit 901 and the communication unit 902 can also perform other corresponding operations in the foregoing method embodiments, which will not be repeated here.

Based on the same concept as the foregoing method embodiment, as shown in FIG. 10, an embodiment of the present application further provides a beam failure processing apparatus 1000, and the beam failure processing apparatus 1000 is used to implement the terminal and/or in the foregoing method embodiment. Or operations performed by network devices. FIG. 10 only shows the main components of the processing device 1000 for beam failure.

The device 1000 for processing beam failure includes: a transceiver 1001, a processor 1002, and a memory 1003. The memory 1003 is optional. The transceiver 1001 is used to transmit messages or signaling with other communication devices. The processor 1002 is coupled with the memory 1003 and is used to call a program in the memory 1003. When the program is executed, the processor 1002 executes the above method embodiments. Operations performed by the terminal and/or network device. The memory 1003 is used to store programs executed by the processor 1002. The transceiver 1001 may include a transmitter and/or a receiver, which respectively implement the transceiver function. There may be one or more processors 1002. The memory 1003 may be located in the processor 1002 or may exist separately. The functional module processing unit 901 in FIG. 9 may be implemented by the processor 1002, and the communication unit 902 may be implemented by the transceiver 1001. Those skilled in the art can understand that, for ease of description, FIG. 10 only shows a memory and a processor. In actual terminals and/or network devices, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.

The processor 1002 is mainly used to process communication protocols and communication data, and to control the entire terminal and/or network equipment, execute software programs, and process data of the software programs, for example, to support the terminal and/or network equipment to execute the above methods The actions described in the embodiment. The memory 1003 is mainly used to store software programs and data.

When performing the function of the terminal, for example, the processor 1002 performs the following operations: sending a first message to the network device on the primary carrier, where the first message is used to indicate that the beam of the secondary carrier fails;

The second message sent by the network device is detected on the primary carrier and/or the secondary carrier, where the second message is used to respond to the first message.

When performing the function of the network device, for example, the processor 1002 performs the following operations: receiving a first message from the terminal, where the first message is used to indicate that the beam of the secondary carrier fails;

A second message is sent to the terminal on the primary carrier or the secondary carrier, and the second message is used to respond to the first message.

The processor 1002 may also perform other operations or functions performed by the terminal or network device in the foregoing method embodiments, and the repetitions are not described again.

When performing the function of the network device, the form of the processing device 1000 for beam failure may be as follows. The processing device 1000 for beam failure is a base station, and the base station may include one or more radio frequency units, such as a remote radio unit (RRU) and one or more baseband units (BBU) (or It is called a digital unit (DU)). The RRU may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna and a radio frequency unit. The RRU part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals. The BBU part is mainly used to perform baseband processing, control the base station, and so on. The RRU and BBU may be physically set together, or physically separated, that is, a distributed base station.

The BBU is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.

In an embodiment, the BBU may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access indication (such as an LTE network), or may respectively support different access standards. Wireless access network (such as LTE network, 5G network or other network). The BBU also includes a memory 1003 and a processor 1002, and the memory 1003 is used to store necessary instructions and data. The processor 1002 is used to control the base station to perform necessary actions, for example, used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment. The memory and processor may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

The processor 1002 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.

The processor 1002 may further include a hardware chip. The aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

The memory 1003 may include a volatile memory (volatile memory), such as a random-access memory (random-access memory, RAM); the memory 1003 may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory). memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 1003 may also include a combination of the foregoing types of memory.

In addition, when performing the function of a network device, the device 1000 for processing beam failure is not limited to the above-mentioned form, and may also be in other forms: for example, including BBU and adaptive radio unit (ARU), or BBU and active antenna The unit (active antenna unit, AAU); it can also be a customer premises equipment (CPE), or it can be in other forms, which is not limited in this application.

Some or all of the operations and functions performed by the terminal described in the foregoing method embodiments of the present application, or some or all of the operations and functions performed by the network device may be completed by chips or integrated circuits.

In order to realize the function of the beam failure processing device described in FIG. 9 or FIG. 10, an embodiment of the present application further provides a chip, including a processor, for supporting the beam failure processing device to implement the terminal or Functions involved in network equipment. In a possible design, the chip is connected to a memory or the chip includes a memory, and the memory is used to store necessary program instructions and data of the communication device.

The embodiment of the present application provides a computer storage medium storing a computer program, and the computer program includes instructions for executing the foregoing method embodiments.

The embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the foregoing method embodiments.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims

A method for processing beam failure, which is characterized in that it comprises:

The terminal sends a first message to the network device on the primary carrier, where the first message is used to indicate that the beam of the secondary carrier fails;

The terminal detects a second message sent by the network device on the primary carrier and/or the secondary carrier, where the second message is used to respond to the first message.
The method of claim 1, wherein the method further comprises:

When the terminal detects the second message on the primary carrier, the second message carries information about the uplink resource for retransmitting the first message; or,

When the terminal detects the second message on the secondary carrier, the second message carries information about downlink resources.
The method according to claim 2, wherein the terminal detecting the second message sent by the network device on the primary carrier comprises:

The terminal detects the second message sent by the network device according to the first downlink control information DCI format on the primary carrier; wherein, the first DCI format is a format used to indicate the DCI of the uplink resource.
The method according to claim 2 or 3, wherein the detection by the terminal on the secondary carrier of the second message sent by the network device comprises:

The terminal detects the second message sent by the network device according to the second DCI format on the secondary carrier; wherein, the second DCI format is a format used to indicate the DCI of the downlink resource.
The method according to any one of claims 1 to 4, wherein the first message includes a first channel and a second channel.
The method according to claim 5, wherein the first channel carries information about a beam failure event of a secondary carrier;

The second channel carries one or more of the following information: the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, the new available beam, and the identifier of the terminal.
The method according to claim 5 or 6, wherein the difference in transmit power between the first channel and the second channel is 0 dB.
The method according to any one of claims 5 to 7, wherein the first channel is a physical random access channel PRACH, and the second channel is a physical uplink shared channel PUSCH; or,

The first channel is the physical uplink control channel PUCCH, and the second channel is the PUSCH; or,

The first channel is PRACH, and the second channel is PUCCH.
The method according to any one of claims 5 to 8, wherein the second message carries first indication information, and the first indication information is used to indicate retransmission of part or all of the first message ;or,

The second message carries second indication information, and the second indication information is used to indicate retransmission of the first channel or retransmission of the second channel.
The method according to any one of claims 1-9, wherein the first message includes at least one of the following information:

The beam failure event of the secondary carrier, the identifier of the secondary carrier, the identifier of the failed beam, the frequency band to which the secondary carrier belongs, the new available beam, and the identifier of the terminal.
A method for processing beam failure, which is characterized in that it comprises:

The network device receives a first message from the terminal, where the first message is used to indicate that the beam of the secondary carrier fails;

The network device sends a second message to the terminal on the primary carrier or the secondary carrier, and the second message is used to respond to the first message.
The method according to claim 11, wherein when the network device sends the second message to the terminal on the primary carrier, the second message carries information about the uplink resource for retransmitting the first message ；

When the network device sends a second message to the terminal on the secondary carrier, the second message carries information about the downlink resource.
The method of claim 12, wherein the network device sending the second message to the terminal on the primary carrier comprises:

The network device sends a second message to the terminal according to the first downlink control information DCI format on the primary carrier, where the first DCI format is a format used to indicate the DCI of the uplink resource.
The method of claim 12 or 13, wherein the network device sending the second message to the terminal on the secondary carrier comprises:

The network device sends a second message to the terminal according to a second DCI format on the secondary carrier, where the second DCI format is a format used to indicate the DCI of the downlink resource.
The method according to any one of claims 11 to 14, wherein the second message includes a third channel and a fourth channel.
The method according to claim 15, wherein the third channel is used to carry information indicating that the beam failure recovery of the secondary carrier is successful, or the third channel is used to carry information indicating that the second carrier should be retransmitted. A message of information;

The fourth channel carries one or more of the following information: downlink resource information, uplink resource information for retransmitting the first message, power control related information for retransmitting the second channel, and terminal identification.
The method according to claim 15 or 16, wherein the power control related information of the retransmitted second channel is used to adjust the transmit power difference between retransmitting the first channel and retransmitting the second channel as 0dB.
The method according to any one of claims 15 to 17, wherein the third channel is a physical downlink control channel PDCCH, and the fourth channel is a physical downlink data channel PDSCH channel.
A processing device for beam failure, which is characterized by comprising a transceiver and a processor, wherein:

The transceiver is used to communicate with other devices under the scheduling of the processor;

The processor is configured to couple with the memory, call the program in the memory, and execute the method according to any one of claims 1-18.
A computer-readable storage medium, characterized in that computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer executes any one of claims 1-18 The method described in the item.
A chip, characterized in that the chip is connected to a memory or the chip includes the memory, and is used to read and execute the software program stored in the memory, so as to realize the method as described in any one of claims 1-18. The method described.