WO2020078318A1

WO2020078318A1 - Communication method and apparatus

Info

Publication number: WO2020078318A1
Application number: PCT/CN2019/111030
Authority: WO
Inventors: 严乐; 曾清海; 张宏平; 耿婷婷
Original assignee: 华为技术有限公司
Priority date: 2018-10-19
Filing date: 2019-10-14
Publication date: 2020-04-23
Also published as: CN111083747A

Abstract

Provided are a communication method and device. The method comprises: a first network device acquiring a beam identifier and uplink transmission resource information associated with the beam identifier, wherein the uplink transmission resource information is used for transmitting a radio resource control (RRC) reconfiguration complete message; and the first network device sending a second message to a terminal device, wherein the second message comprises the beam identifier and the uplink transmission resource information. According to the method and apparatus provided in the present application, after receiving a second message, a terminal device can acquire, according to the second message, a resource required for sending an RRC reconfiguration complete message and sends the RRC reconfiguration complete message to a second network device, so that the terminal device can directly send the RRC reconfiguration complete message to the second network device without executing a random access process.

Description

Communication method and device

This application claims the priority of the Chinese patent application filed on October 19, 2018, with the Chinese Patent Office, application number 201811222456.7, and the invention titled "Communication Method and Device", the entire contents of which are incorporated by reference in this application.

Technical field

The present application relates to the field of communication, and in particular to a communication method and device.

Background technique

In a communication system, each base station provides services for mobile terminals within a certain range. As the terminal equipment moves, it may be necessary to switch the terminal equipment from the current serving base station to the target base station.

When the terminal device is moving to the edge area of the serving cell or has moved to the edge area of the serving cell, the serving base station (source base station) communicating with the terminal device may send a handover message to the terminal device over the air interface. The handover message may Reconfiguration messages for radio resource control (RRC) connections carrying mobility control information (mobility control information), or RRC reconfiguration messages carrying synchronization reconfiguration cells (ReconfigurationWithSync). After sending the handover message to the terminal device, the source base station will stop scheduling the uplink and downlink data of the terminal device. After receiving the handover message, the terminal device performs synchronization with the target cell to be handed over, and initiates a random access process to obtain a timing advance (TA) value and uplink transmission resource information. The terminal device sends an RRC reconfiguration completion message to the target base station on the corresponding uplink transmission resource information, which is used to indicate the completion of the handover. After receiving the RRC reconfiguration complete message, the target base station starts uplink and downlink data transmission with the terminal device.

From the above description of the handover process, it can be seen that from the time when the source base station sends the handover message to the terminal device, until the target base station receives the RRC reconfiguration complete message, the uplink and downlink scheduling of the terminal device will be interrupted during this period.

However, for the new radio (NR) system, how to reduce the time of handover interruption has become an urgent problem to be solved.

Summary of the invention

This application provides a communication method and equipment, and proposes a solution to reduce the handover interruption time for the NR system or a scenario where a similar network is deployed.

In a first aspect, the present application provides a communication method, including: a first network device acquiring a beam identifier and uplink transmission resource information associated with the beam identifier, the uplink transmission resource information is used for transmission radio resource control RRC reconfiguration Completion message; the first network device sends a second message to the terminal device, where the second message includes the beam identifier and the uplink transmission resource information. With this implementation, the terminal device can obtain the resources required to send the RRC reconfiguration completion message through the second message, and then use the resources to send the RRC reconfiguration completion message, thereby reducing the time for handover interruption.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first network device acquiring the beam identifier and the uplink transmission resource information associated with the beam identifier includes: the first network device receives from the second network device A first message including the beam identifier and the uplink transmission resource information, where the first network device is a network device to which a serving cell belongs, and the second network device is to a target cell Network equipment. When the first message includes the uplink transmission resource information, the second message also includes the uplink transmission resource information. In this implementation manner, when the serving cell and the target cell belong to different network devices, the first network device can obtain the uplink transmission resource information provided by the other network device to the terminal device, so that the terminal device can obtain After sending the resources required for the RRC reconfiguration complete message, skip the random access process and directly use the acquired resources to send the RRC reconfiguration complete message to the second network device, thereby avoiding the interruption delay caused by the random access process .

With reference to the first aspect, in a second possible implementation manner of the first aspect, the method further includes: the first network device sends sounding reference signal SRS configuration information to the terminal device, and the SRS configuration information is used to configure the The terminal device sends the parameters required by the SRS to the second network device. In this implementation manner, the first network device sends the SRS configuration information to the terminal device, so that the terminal device can send the corresponding SRS according to the SRS configuration information, so that the second network device provides uplink transmission resource information for the terminal device.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the second message further includes a channel reciprocity indication and / or a signal quality threshold. The second message may include at least one of channel reciprocity indication and / or signal quality threshold. The channel reciprocity indicator is used to indicate whether the current application scenario has channel reciprocity, and the signal quality threshold value can facilitate the terminal device to select a beam that meets the signal quality threshold requirement from the third downlink beam as the fourth downlink beam or the fifth Downlink beam.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the beam identification includes a synchronization signal block index or channel state information reference signal index; or, the beam identification includes an SRS identification. The terminal device may determine the corresponding beam according to the beam identifier.

In a second aspect, the present application provides another communication method, including: a second network device generates a first message; a second network device sends a first message to the first network device, and the first message includes a beam identifier. The beam identifier may be used to indicate part or all of the beams measured by the terminal device that belong to the second network device, and the beam indicated by the beam identifier is used to determine uplink transmission resource information. With this implementation, the terminal device can determine the resources required to send the RRC reconfiguration completion message according to the beam identifier, and then use the resources to send the RRC reconfiguration completion message, thereby reducing the time for handover interruption.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first message further includes uplink transmission resource information associated with the beam identification, and the uplink transmission resource information is used to transmit wireless resources Control RRC reconfiguration complete message. With this implementation, the second network device can send the uplink transmission resource information to the terminal device through the first network device, so that the terminal device obtains the resources required to send the RRC reconfiguration complete message.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes: the second network device sends indication information on the beam indicated by the beam identification, and the indication information includes an association with the beam identification Upstream transmission resource information. With this implementation, the second network device can send the uplink transmission resource information to the terminal device through the indication information.

With reference to the second aspect or any one of the first to two possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the beam identifier includes a synchronization signal block index or a channel state information reference signal index. The terminal device may determine the corresponding beam according to the beam identifier.

With reference to the second aspect or any one of the first to three possible implementation manners of the second aspect, in a fourth possible implementation manner of the second aspect, the first message further includes an indication of channel reciprocity and / or Or signal quality threshold. The channel reciprocity indicator is used to indicate whether the current application scenario has channel reciprocity, and the signal quality threshold value can facilitate the terminal device to select a beam that meets the signal quality threshold requirement from the third downlink beam as the fourth downlink beam or the fifth Downlink beam.

In a third aspect, the present application provides yet another communication method, including: receiving a message including a beam identifier from a first network device; and sending RRC reconfiguration to a second network device using uplink transmission resource information determined according to the beam identifier Complete the message. With this implementation, the terminal device may determine the resources required to send the RRC reconfiguration completion message according to the beam identifier sent by the first network device, and send the RRC reconfiguration completion message to the second network device, so that the terminal device may not perform random During the access process, an RRC reconfiguration completion message is directly sent to the second network device, thereby reducing the interruption time.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the beam identification includes a synchronization signal block index or a channel state information reference signal index. The terminal device may determine the corresponding beam according to the beam identifier.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the terminal device uses the uplink transmission resource information determined according to the beam identifier to send the RRC retransmission to the second network device The configuration completion message includes that the terminal device uses the uplink transmission resource information associated with the beam identifier to send an RRC reconfiguration completion message to the second network device. With this implementation, the terminal device can use the uplink transmission resource information associated with the beam identifier to send an RRC reconfiguration completion message to the second network device, so that the terminal device can skip the random access process and directly send the The network device sends an RRC reconfiguration complete message, thereby reducing the interruption delay.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the uplink transmission resource information associated with the beam identification is determined by the terminal device from the included beam identification Get the message. Wherein, the message including the beam identification may be the second message. With this implementation, the terminal device can use the uplink transmission resource information obtained from the message including the beam identification to send an RRC reconfiguration completion message to the second network device, so that the terminal device does not need to perform random access and directly The second network device sends an RRC reconfiguration complete message, thereby reducing the interruption delay.

With reference to the second possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the uplink transmission resource information associated with the beam identifier is obtained by the terminal device from the indication information, The indication information is obtained by the terminal device listening on the beam indicated by the beam identifier. With this implementation, the terminal device can use the uplink transmission resource information obtained from the indication information to send an RRC reconfiguration completion message to the second network device, so that the terminal device can directly send the second device without performing the random access process. The network device sends an RRC reconfiguration complete message, thereby reducing the interruption delay.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the terminal device uses the uplink transmission resource information determined according to the beam identifier to send the RRC retransmission to the second network device The configuration completion message includes: the terminal device acquiring the SRS identifier and the uplink transmission resource information associated with the SRS identifier from the indication information, the indication information is carried out by the terminal device on the beam indicated by the beam identifier Obtained by monitoring; the terminal device uses the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device. With this implementation, the terminal device can use the uplink transmission resource information obtained from the indication information to send an RRC reconfiguration completion message to the second network device, so that the terminal device can directly report to the device without performing a random access procedure. The second network device sends an RRC reconfiguration complete message, thereby reducing the interruption delay.

With reference to any one of the second to fifth implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the message including the beam identification further includes a signal quality threshold; and the beam The signal quality of the beam indicated by the identifier may not be lower than the signal quality threshold. The signal quality threshold value is obtained by the terminal device from the message including the beam identification. With this implementation, the terminal device can determine the uplink transmission resource according to the beam identifier corresponding to the beam whose signal quality is not lower than the signal quality threshold, and send an RRC reconfiguration completion message to the second network device.

With reference to the third aspect, in a seventh possible implementation manner of the third aspect, the beam identifier includes an SRS identifier; and the message including the beam identifier includes uplink transmission resource information associated with the SRS identifier.

With reference to the seventh possible implementation manner of the third aspect, in an eighth possible implementation manner of the third aspect, the terminal device uses the uplink transmission resource information determined according to the beam identifier to send the RRC retransmission to the second network device The configuration completion message includes: the terminal device uses the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device. With this implementation, the terminal device can skip the random access process and directly use the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device, thereby avoiding the interruption caused by the random access process Delay.

With reference to any one of the fifth, seventh, or eighth possible implementation manners of the third aspect, in a ninth possible implementation manner of the third aspect, the terminal device receives a sounding reference from the first network device Signal SRS configuration information, the SRS configuration information is used to configure parameters required for the terminal device to send SRS to the second network device; the terminal device sends SRS to the second network device according to the SRS configuration information . With this implementation, the terminal device can send the SRS to the second network device according to the configuration of the first network device, so that the second network device allocates uplink transmission resources for transmitting the RRC reconfiguration complete message according to the SRS measurement.

In a fourth aspect, the present application provides a communication device, including a module for performing the foregoing first aspect or various implementation manners of the first aspect. In a possible implementation manner, the communication apparatus includes: an acquisition module for acquiring a beam identifier and uplink transmission resource information associated with the beam identifier, the uplink transmission resource information is used for transmission radio resource control RRC reconfiguration Completion message; a sending module, configured to send a second message to the terminal device, where the second message includes the beam identifier and the uplink transmission resource information. The communication device of the above fourth aspect may be a network device or a component (such as a chip or a circuit) that can be used for the network device.

In a fifth aspect, the present application provides another communication device, including a module for performing the foregoing second aspect or various implementation manners of the second aspect. In a possible implementation manner, the communication apparatus includes: a generating module for generating a first message; and a sending module for sending a first message to a first network device. The beam identifier is used to indicate part or all of the beams measured by the terminal device that belong to the second network device, and the beam indicated by the beam identifier is used to determine uplink transmission resource information, where uplink transmission The resource information is used to transmit a radio resource control RRC reconfiguration complete message. The first network device is the network device to which the serving cell belongs, and the second network device is the network device to which the target cell belongs. The communication device of the fifth aspect described above may be a network device or a component (such as a chip or a circuit) that can be used for the network device.

In a sixth aspect, the present application provides another communication device, including a module for performing the foregoing third aspect and various implementation manners of the third aspect. In a possible implementation manner, the communication apparatus includes: wherein, a receiving module is configured to receive a message including a beam identifier from the first network device; a sending module is configured to use uplink transmission resource information determined according to the beam identifier , Sending an RRC reconfiguration complete message to the second network device. The communication device of the sixth aspect described above may be a terminal device or a component (such as a chip or a circuit) that can be used for the terminal device.

In a seventh aspect, the present application also provides a communication device, including a memory, a processor, and a program or code stored in the memory and executable on the processor, characterized in that when the processor executes the program, Implementing the method according to the foregoing first aspect or any implementation manner of the first aspect, or implementing the method according to the foregoing second aspect or any implementation manner of the second aspect.

In an eighth aspect, the present application also provides a communication device, including a memory, a processor, and a program or code stored in the memory and executable on the processor, characterized in that when the processor executes the program, Implementing the method as described in the third aspect or any implementation manner of the third aspect.

In a ninth aspect, the present application also provides a computer-readable storage medium, including instructions, which when executed on a computer, implement the method described in the foregoing first aspect or any implementation manner of the first aspect, or an implementation The method according to the foregoing second aspect or any implementation manner of the second aspect, or the method according to the foregoing third aspect or any implementation manner of the third aspect.

In a tenth aspect, the present application also provides a computer program product which, when running on a computer, implements the method described in the first aspect or any implementation manner of the first aspect, or implements the second aspect described above Or the method described in any one implementation manner of the second aspect, or the method described in the foregoing third aspect or any implementation manner of the third aspect.

With the method and apparatus provided in this application, the first network device can send a second message to the terminal device, and the terminal device can obtain the resources required to send the RRC reconfiguration complete message to the second network device according to the second message. Then, the random access process is skipped, and the obtained resource is used to directly send an RRC reconfiguration completion message to the second network device, thereby avoiding the interruption delay caused by the random access process and reducing the time for handover interruption.

BRIEF DESCRIPTION

1 is a schematic structural diagram of a communication system applied in an embodiment of the present application;

2 is a schematic flowchart of an embodiment of a communication method of this application;

3 is a schematic flowchart of another embodiment of a communication method of the present application;

4 is a schematic flowchart of still another embodiment of the communication method of the present application;

5 is a schematic flowchart of an embodiment of a communication method of this application;

6 is a schematic flowchart of an embodiment of a communication method of this application;

7 is a schematic structural diagram of an embodiment of a network device of this application;

8 is a schematic structural diagram of an embodiment of a terminal device of the present application;

9 is a schematic structural diagram of another embodiment of a network device according to this application;

10 is a schematic structural diagram of another embodiment of a terminal device of the present application.

detailed description

FIG. 1 is a schematic structural diagram of a communication system applied in an embodiment of the present application. As shown in FIG. 1, the communication system may include at least one network device and at least one terminal device. For example, as shown in FIG. 1, the communication system may include a first network device 101, a second network device 102, and a terminal device 103 . The first network device may be the network device to which the serving cell (that is, the source cell) belongs, and the second network device may be the network device to which the target cell belongs.

The network device is an access device in which the terminal device accesses the communication system in a wireless manner, and may be a base station NodeB, an evolved base station eNodeB, a base station in a 5G mobile communication system, a base station in a future mobile communication system or a WiFi system , Access nodes in LTE-U or other unlicensed spectrum wireless systems, etc., the embodiments of the present application do not limit the specific technologies and specific device forms adopted by network devices.

The terminal device may also be called a terminal (Terminal), a user equipment (UE), a mobile station (MS), a mobile terminal (MT), and so on. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (Augmented Reality, AR) terminal devices, industrial control (industrial control) ), Wireless terminals in self-driving, wireless terminals in remote surgery, wireless terminals in smart grids, and transportation safety. Wireless terminals, wireless terminals in smart cities, wireless terminals in smart homes, smart meters with wireless communication functions, smart water meters, environmental sensors, device tags, location tags, etc.

The terminal device is connected to the network device in a wireless manner, and the network device can be connected to the core network device in a wireless or wired manner. The core network device and the wireless access network device may be independent and different physical devices, or they may integrate the functions of the core network device and the logical function of the wireless access network device on the same physical device, or may be a physical device It integrates the functions of part of the core network equipment and part of the functions of the wireless access network equipment. The terminal device may be fixed or mobile.

It should be noted that FIG. 1 is only a schematic diagram of the communication system of the present application. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, etc., not shown in FIG. 1. . The embodiments of the present application do not limit the number of core network devices, wireless access network devices, and terminal devices included in the communication system. Of course, the embodiments of the present application can also be applied to other communication systems having terminal devices and core network devices, and capable of exchanging information between the terminal devices and the core network devices. The embodiments of the present application do not limit this.

For ease of understanding, the following first briefly describes the concepts to be used in this application.

In various embodiments of the present application, the neighboring cell refers to a cell adjacent to the serving cell. When performing radio resource management (RRM) measurement, the terminal device may measure an adjacent cell that overlaps with the serving cell. The neighbor cell identifier refers to the cell identifier of the neighbor cell, and the neighbor cell identifier includes a physical cell identifier (PCI) or a global cell identifier (CGI) of the neighbor cell. The target cell is one of the neighboring cells. The neighbor cell signal quality refers to the cell level signal quality of the neighbor cell indicated by the neighbor cell identifier, and the signal quality includes reference signal received power or reference signal received quality.

In various embodiments of the present application, a beam can be understood as a spatial resource, which can refer to a transmission or reception precoding vector with energy transmission directivity. In addition, the transmitted or received precoding vector can be identified by index information, which can correspond to the resource identity (ID) of the configured terminal, for example, the index information can correspond to the configured CSI-RS identifier or resource ; It can also be the identifier or resource corresponding to the configured upstream sounding reference signal (SRS). Optionally, the index information may also be index information displayed or implicitly carried by a signal or channel carried by a beam. The energy transmission directivity may refer to the precoding processing of the signal to be sent through the precoding vector, the signal after the precoding processing has a certain spatial directivity, and the precoding processing after receiving the precoding vector The signal has better received power, such as satisfying the reception demodulation signal-to-noise ratio, etc .; the energy transmission directivity can also mean that the same signal sent from different spatial positions received by the precoding vector has different received power. Optionally, the same communication device (such as a terminal device or a network device) may have different precoding vectors, and different devices may also have different precoding vectors, that is, corresponding to different beams. Regarding the configuration or capability of the communication device, one communication device may use one or more of multiple different precoding vectors at the same time, that is, one beam or multiple beams may be formed at the same time.

In this application, the beam sent by the network device to the terminal device is called a downlink beam, and the beam sent by the terminal device to the network device is called an uplink beam.

In various embodiments of the present application, the first beam identifier refers to the beam identifier of the first downlink beam, and the beam indicated by the first beam identifier is the first downlink beam. The first downlink beam refers to the downlink beam of the neighboring cell measured by the terminal device. That is, the first downlink beam is a downlink beam measured by the terminal device, and the downlink beam belongs to the neighboring cell. The first downlink beam may generally include one or more downlink beams; when there are multiple neighboring cells, different first downlink beams may belong to different neighboring cells. The beam identification may include a synchronization signal block index (for example, SSB index) or a channel state information reference signal index (for example, CSI-RS index). The first beam signal quality refers to the beam level signal quality of the first downlink beam, and the signal quality includes reference signal received power or reference signal received quality. The first beam signal quality corresponding to the first beam identifier refers to the beam signal quality of the downlink beam indicated by the first beam identifier.

In various embodiments of the present application, the second beam identifier refers to the beam identifier of the second downlink beam, and the beam indicated by the second beam identifier is the second downlink beam. The second downlink beam refers to a beam that belongs to the target cell in the first downlink beam, or that the second downlink beam refers to a beam that belongs to the second network device in the first downlink beam. That is, the second downlink beam is a subset of the first downlink beam, and the second downlink beam is one or more downlink beams belonging to the target cell in the first downlink beam. The second beam signal quality refers to the beam level signal quality of the second downlink beam, and the signal quality includes reference signal received power or reference signal received quality. The second beam signal quality corresponding to the second beam identifier refers to the beam signal quality of the downlink beam indicated by the second beam identifier.

In various embodiments of the present application, the third beam identifier refers to the beam identifier of the third downlink beam, and the beam indicated by the third beam identifier is the third downlink beam. The third downlink beam is one or more downlink beams in the second downlink beam. Correspondingly, the third beam identifier is all or part of the second beam identifier. The terminal device may determine the transmission direction of the RRC reconfiguration completion message according to the transmission direction of the third downlink beam, and the second network device may also use the third downlink beam to send the indication information.

In each embodiment of the present application, the fourth beam identifier refers to the beam identifier of the fourth downlink beam, the beam indicated by the fourth beam identifier is the fourth downlink beam, and the fourth downlink beam refers to the terminal device The downlink beam selected from the third downlink beam to determine the uplink transmission direction / uplink transmission resource information. The fourth beam identifier is one of the third beam identifiers. The fifth beam identifier refers to the beam identifier of the fifth downlink beam, and the beam indicated by the fifth beam identifier is the fifth downlink beam, and the fifth downlink beam refers to the terminal device determining from the third downlink beam Downlink beams that need to be monitored for indication information. The fifth beam identifier is one of the third beam identifiers.

In various embodiments of the present application, the third message refers to a message for requesting handover preparation / admission control; the first message refers to a message sent in response to the third message; the second message refers to A message instructing the terminal device to perform the switching operation. For example, the third message may be a handover request message; the first message may be a handover request confirmation message; the second message may be an RRC reconfiguration message, for example, may be an RRC carrying mobility control information cell (mobility control information) The connection reconfiguration message, or may be an RRC reconfiguration message carrying a synchronization reconfiguration cell (ReconfigurationWithSync). It should be noted that the first message, the second message, and the third message may be other messages, or may have other names, which is not limited in this application.

The solutions disclosed in the present application are introduced below through different embodiments.

Referring to FIG. 2, it is a schematic flowchart of an embodiment of a communication method of the present application. The embodiments of the present application will be described below with reference to the drawings.

Step 201: The first network device acquires sounding reference signal (SRS) configuration information of each neighboring network device.

For example, in an application scenario where the communication system does not have channel reciprocity, the first network device acquires SRS configuration information of each neighboring network device including the second network device. Wherein, whether the communication system has channel reciprocity may refer to whether the communication system has channel reciprocity between the uplink channel and the downlink channel. The neighboring network device refers to a network device whose cell coverage area overlaps with the cell coverage area served by the first network device.

The SRS configuration information is used to configure parameters required by the terminal device to send an SRS to the neighboring network device. The SRS configuration information includes one or more of SRS identification (such as SRS index or SRS ID, etc.), type information of SRS resources, SRS resource configuration, and SRS spatial relationship information. Optionally, the SRS configuration information further includes a cell radio network temporary identifier (C-RNTI) allocated by the neighboring network device to the terminal device and TA information of the neighboring cell, for example, when the neighboring cell is a small cell , The TA information of the neighboring cell is used to indicate that the TA value of the neighboring cell is equal to 0, and when the neighboring cell and the source cell belong to the same network device, the TA information of the neighboring cell is used to indicate the neighboring cell The TA value of the zone is equal to the TA value of the source cell.

It can be understood that step 201 is an optional step. For example, in an application scenario where the communication system has channel reciprocity, the first network device may not need to obtain the SRS configuration information. In each embodiment of this application, only the SRS configuration information is used as an example for description. In different scenarios or systems, this information may have different names, and this application is not limited; except for the information listed in this application In addition, it may also contain more or less information, which is not limited in the embodiments of the present application.

Step 202: The first network device sends an RRC reconfiguration message to the terminal device.

The first network device sends an RRC reconfiguration message to the terminal device. It can be understood that the information contained in the RRC reconfiguration information may be different according to different application scenarios.

For example, in an application scenario where there is no channel reciprocity between the uplink channel and the downlink channel, the RRC reconfiguration message may include measurement configuration information used by the terminal device for RRM measurement and SRS configuration information of each neighboring network device; In an application scenario with channel reciprocity between the uplink channel and the downlink channel, the RRC reconfiguration message may include measurement configuration information used by the terminal device to perform RRM measurement, but does not include the SRS configuration information.

After receiving the measurement configuration information for RRM measurement, the terminal device performs synchronization-based signal block (SSB) or channel state information reference signal (channel-state information-reference signals, CSI-based on the measurement configuration information RS) RRM measurement, the SSB and the CSI-RS are reference signals used for the RRM measurement. The SSB may be a synchronization signal or a physical broadcast channel sent through a beam, and the CSI-RS may be a channel state information reference signal sent through a beam.

It can be understood that, in the embodiments of the present application, the RRC reconfiguration message is only used as an example for illustration. In different scenarios or systems, the message may have different message names; in addition to the enumerations listed in this application In addition to the information, the message may also contain more or less information, which is not limited in the embodiments of the present application.

Step 203: The terminal device sends a measurement report to the first network device.

The measurement report may include the neighbor cell identifier and the first beam identifier. For the description of the first downlink beam and the first beam identifier, reference may be made to the foregoing, which will not be repeated here. Optionally, in addition to including the neighbor cell identifier and the first beam identifier, the measurement report may also include the neighbor cell signal quality or the first beam signal quality, regarding the neighbor cell signal quality and the first beam signal quality The description can also refer to the foregoing, and will not be repeated here.

There may be multiple neighbor cell identifiers, and neighbor cells indicated by different neighbor cell identifiers may belong to the same base station or different base stations; the first beam identifier may also be multiple, different first beam identifiers. The indicated beams can belong to the same neighboring cell or belong to different neighboring cells. When there are multiple neighboring cells, the measurement report may include the neighboring cell identifier of each neighboring cell and the signal quality of the neighboring cell, and include the first beam identifier and each of the first downlink beams. Signal quality of the first beam.

If the RRC reconfiguration message includes SRS configuration information, the terminal device may also use at least one uplink beam to send the SRS corresponding to the uplink beam according to the SRS configuration information. SRSs sent using different uplink beams may have different SRS identifiers, or may have the same SRS identifier.

Step 204: The first network device sends a third message to the second network device.

After receiving the measurement report, the first network device determines the target cell according to the measurement report, and then sends a third message to the network device to which the target cell belongs. The network device to which the target cell belongs is the second network device. .

The third message may include a second beam identifier; optionally, in addition to the second beam identifier, the third message may also include a second beam signal corresponding to the second beam identifier quality. When there are multiple second beam identifiers, the third message may include the second beam identifier of each second downlink beam and the corresponding second beam signal quality. For the description of the second downlink beam, the second beam identifier, and the signal quality of the second beam, reference may be made to the foregoing, and details are not described herein again.

Through the foregoing steps 201 to 204, the first network device may determine the target cell, and send a third message to the second network device to which the target cell belongs, and send the second beam identifier to the second network device through the third message. In actual use, the target cell may also be determined in other ways, or the second beam identifier may be sent to the second network device in other ways, and specific methods will not be repeated here. That is to say, for the embodiments of the present application, steps 201-204 are optional steps, and there may be other implementation methods.

Step 205: The second network device sends the first message to the first network device.

The first message may include information related to the resource transmitting the radio resource control RRC reconfiguration complete message. For example, the first message may include a beam identifier and uplink transmission resource information associated with the beam identifier; or the first message may include a beam identifier, but does not include an uplink associated with the beam identifier Transfer resource information. Wherein, the uplink transmission resource information refers to information that can be used to determine the uplink transmission resource. The uplink transmission resource information can be the uplink transmission resource itself or the indication information of the uplink transmission resource, for example, it can be used to indicate the uplink Index information of transmission resources, etc.

For example, the first message may include a downlink beam identifier and uplink transmission resource information associated with the downlink beam identifier; or the first message may include an uplink beam identifier and uplink associated with the uplink beam identifier Transmission resource information; or the first message may include a downlink beam identifier, but does not include uplink transmission resource information. Wherein, the downlink beam identifier may be any one or more of SSB index or CSI-RS index, the downlink beam identifier may also be other representation forms, and the uplink beam identifier may be an SRS identifier (for example, SRS index Or SRS ID).

When the first message does not include uplink transmission resource information, in addition to sending the first message to the first network device, the second network device may also send indication information through the downlink beam indicated by the downlink beam identifier . The indication information may include uplink transmission resource information associated with the downlink beam identification, or the indication information may include uplink beam identification and uplink transmission resource information associated with the uplink beam identification.

In an implementation manner, after receiving the third message, the second network device allocates associated uplink transmission resources for the beam indicated by the third beam identifier (ie, the third downlink beam), where the third beam The identification is all or part of the second beam identification. The uplink transmission resource may be an uplink scheduling grant (UL grant) or a physical uplink shared channel (physical uplink shared channel, PUSCH) resource. The uplink transmission resource may be periodic or aperiodic. For the description of the third downlink beam and the third beam identifier, reference may be made to the foregoing, and details are not described herein again.

Optionally, the third beam identifier may be multiple, and the uplink transmission resource information may be multiple copies. When there are multiple third beam identifiers, each third beam identifier has uplink transmission resource information associated with it, and different uplink transmission resource information associated with the third beam identifier may be the same or may also be different.

After allocating the associated uplink transmission resources for the third downlink beam, the second network device may send a first message to the first network device, where the first message may include a third beam identifier and the third beam Identify the associated uplink transmission resource information; or you can send the first message to the first network device and send the indication information through the third downlink beam, where the first message may contain the third beam identifier, so The indication information may include uplink transmission resource information associated with the third beam identifier.

In another implementation manner, if the terminal device has used at least one uplink beam to send the SRS corresponding to the uplink beam to the second network device according to the SRS configuration information, the second network device may send the SRS from Among the uplink beams, select at least one uplink beam with better signal quality, and allocate uplink transmission resources to the selected uplink beam. That is, the second network device allocates the uplink transmission resource to the beam indicated by the SRS identifier, and the SRS identifier is used to indicate the selected uplink beam.

Optionally, the SRS identifier may be multiple, and the uplink transmission resource information may be multiple copies. When there are multiple SRS identifiers, each of the SRS identifiers has associated uplink transmission resource information, and different uplink transmission resource information associated with the different SRS identifiers may be the same or different.

After allocating the associated uplink transmission resource for the SRS identifier, the second network device may send a first message to the first network device, the first message may include the SRS identifier and the SRS identifier associated with the SRS identifier Uplink transmission resource information. Alternatively, the second network device may send a first message to the first network device and send indication information through a third downlink beam; wherein the first message may include the third beam identifier, and the indication information may Including the SRS identifier and uplink transmission resource information associated with the SRS identifier.

Optionally, the first message may further include a channel reciprocity indication and / or a signal quality threshold. The first message includes a channel reciprocity indicator and / or a signal quality threshold value means that the first message may include one of a channel reciprocity indicator or a signal quality threshold value, or may include both channel reciprocity The indication includes the signal quality threshold. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication, and select a downlink beam according to the signal quality threshold.

It can be understood that in each embodiment of the present application, the first message is only used as an example for description. In different scenarios or systems, the message may have a different message name; in addition to the information listed in this application In addition, the message may also contain more or less information, which is not limited in this embodiment of the present application.

Step 206: The first network device sends a second message to the terminal device.

After receiving the first message, the first network device sends a second message to the terminal device. The information contained in the second message may be determined according to the information contained in the first message. In a possible manner, the second message includes the content included in the first message. For example, a method for sending the second message may be: the first network device transmits the content of the first message to the terminal device in a transparent transmission manner.

For example, when the first message includes a downlink beam identifier and uplink transmission resource information associated with the downlink beam identifier, the second message also includes the downlink beam identifier and the downlink beam identifier Linked uplink transmission resource information. When the first message includes an uplink beam identifier and uplink transmission resource information associated with the uplink beam identifier, the second message also includes the uplink beam identifier and the uplink beam identifier associated with the uplink beam identifier Uplink transmission resource information. When the first message includes a downlink beam identifier but does not include uplink transmission resource information, the second message also includes the downlink beam identifier but does not include uplink transmission resource information.

In addition to the beam identifier or the uplink transmission resource information, the second message may further include an indication of channel reciprocity and / or a threshold value of signal quality. The second message includes a channel reciprocity indicator and / or a signal quality threshold value means that the first message may include one of a channel reciprocity indicator or a signal quality threshold value, or may include both channel reciprocity The indication includes the signal quality threshold. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication. The terminal device determines the downlink beam according to the signal quality threshold, for example, the terminal device determines the beam whose measured signal quality is not lower than the signal quality threshold as the downlink beam to communicate with the second network device.

When the first message does not include the channel reciprocity indication and / or signal quality threshold, the channel reciprocity indication and / or signal quality threshold may be generated by the first network device; and When the first message contains the channel reciprocity indication and / or signal quality threshold, the first network device may obtain the channel reciprocity indication and / or from the first message Signal quality threshold.

It should be noted that if the target cell and the serving cell belong to the same network device, that is, the first network device and the second network device are the same network device, then the network device may not need to send the third message and the first message. Send the second message directly to the terminal device, that is, steps 204 and 205 may not be executed. The content contained in the second message can be referred to the foregoing, and will not be repeated here.

It can be understood that, in the present application, the subsequent embodiments are all exemplified by using the first network device and the second network device as different network devices. For the case where the first network device and the second network device are the same network device, the overall process is similar, but no interaction between the two network devices is required.

It can be understood that in each embodiment of the present application, the second message is only used as an example for description. In different scenarios or systems, the message may have a different message name; in addition to the information listed in this application In addition, the message may also contain more or less information, which is not limited in this embodiment of the present application.

Step 207: After receiving the second message, the terminal device uses the uplink transmission resource information determined according to the second message to send an RRC reconfiguration completion message to the second network device.

It can be understood that, in step 207, the RRC reconfiguration completion message is used as an example for description. In different scenarios or systems, different message names may be used, which is not limited in this embodiment of the present application.

After receiving the second message, the terminal device may determine the uplink transmission direction and the uplink transmission resource information according to the second message, and then use the uplink transmission resource information in the uplink transmission direction to the second network device Send RRC reconfiguration complete message. It should be noted that using the uplink transmission resource information to send the RRC reconfiguration completion message to the second network device refers to using the transmission resource determined according to the uplink transmission resource information to send the RRC reconfiguration completion message, such as When it is the uplink transmission resource itself, the terminal device can use the uplink transmission resource to send the RRC reconfiguration completion information; and when the uplink transmission resource information is the indication information of the uplink transmission resource, the terminal device can use the uplink transmission The resource indicated by the resource information sends the RRC reconfiguration completion information.

Depending on the application scenario and the content contained in the second message, the uplink sending direction and the method for determining the uplink transmission resource information may also be different.

In an implementation manner, if the second message includes a third beam identifier and uplink transmission resource information associated with the third beam identifier, the terminal device may select a signal from the third downlink beam A beam whose quality is not lower than the signal quality threshold is used as the fourth downlink beam. After the fourth downlink beam is determined, the terminal device uses the uplink transmission resource information associated with the fourth beam identifier to send the RRC reconfiguration in the uplink transmission direction determined according to the beam direction of the fourth downlink beam. News. For the description of the fourth downlink beam and the fourth beam identification, reference may be made to the foregoing, and details are not described herein again.

In another implementation manner, if the beam identifier included in the second message is an uplink beam identifier, and the second message further includes uplink transmission resource information associated with the uplink beam identifier. Then, the terminal device may determine the uplink transmission direction according to the direction of the beam indicated by the uplink beam identifier, and use the uplink transmission resource information associated with the uplink beam identifier to send the RRC reconfiguration completion message.

In another implementation manner, if the second message includes a third beam identifier but does not include uplink transmission resource information, the terminal device determines a fifth downlink beam that needs to be monitored by indication information according to the second message, The indication information is obtained by monitoring the fifth downlink beam, where the fifth downlink beam is one of the third downlink beams.

If the indication information monitored at the fifth downlink beam includes uplink transmission resource information associated with the fifth downlink beam, the terminal device may determine the uplink transmission direction according to the beam direction of the fifth downlink beam, Using the uplink transmission resource information associated with the fifth downlink beam to send the RRC reconfiguration completion message in the uplink sending direction.

If the indication information monitored at the fifth downlink beam includes an uplink beam identifier and uplink transmission resource information associated with the uplink beam identifier, the terminal device may use the beam indication indicated by the uplink beam identifier The direction determines the uplink sending direction, and uses the uplink transmission resource information associated with the uplink beam identifier to send the RRC reconfiguration complete message. For the description of the fifth downlink beam, reference may be made to the foregoing, which will not be repeated here.

The method provided in the foregoing embodiment can reduce the delay in which the uplink scheduling of the terminal device is interrupted during the handover process, and thus can improve the service experience of delay-sensitive services.

It should be noted that, in each embodiment of the present application, the serving cell and the target cell may belong to the same base station. It can be understood that the serving cell and the target cell belong to the same base station, that is, the first network device and the first cell The second network device is the same network device. When the first network device and the second network device are the same network device, the terminal device determines that the target cell and the serving cell have the same TA. Alternatively, the serving cell and the target cell may also belong to different base stations, and the target cell may be a small cell. When the target cell is a small cell, the terminal device determines that the TA of the target cell is 0. Or, the target cell and the serving cell may belong to different base stations and the target cell is not a small cell, and the TA of the target cell may be calculated by the terminal device according to the corresponding information. The terminal device performs uplink synchronization with the target cell or the second network device according to the determined TA of the target cell.

The communication method applied will be further described below with reference to the drawings.

Referring to FIG. 3, it is a schematic flowchart of another embodiment of the communication method of the present application. The communication method may include the following steps:

Step 301: The first network device sends an RRC reconfiguration message to the terminal device.

The RRC reconfiguration message includes measurement configuration information, which is used to configure the terminal device to perform RRM measurement based on SSB or CSI-RS, and the SSB and the CSI-RS are references used to perform the RRM measurement signal.

Step 302: The terminal device sends a measurement report to the first network device.

After receiving the RRC reconfiguration message, the terminal device performs RRM measurement on the downlink reference signal SSB or CSI-RS according to the measurement configuration information; after the trigger condition is satisfied, the terminal device sends a measurement report to the first network device .

The measurement report may include at least one neighbor cell identifier and at least one first beam identifier. The first beam identifier may be in the form of a synchronization signal block (SSB) index or a channel state information reference signal ( channel, information, reference, CSI-RS index, etc.

Taking RSM measurement based on SSB as an example, when the neighboring cell includes neighboring cell 1 and neighboring cell 2, the first downlink beam includes beam 1 belonging to neighboring cell 1, beam 2 and beam 3 belonging to neighboring cell 2. At this time, the measurement report may include PCI1 or CGI1 of neighboring cell 1 and PCI2 or CGI2 of neighboring cell 2, and include the beam identifier of beam 1, the beam identifier of beam 2, and the beam identifier of beam 3. For the convenience of subsequent description, the following uses SSB1 to represent the beam identifier of beam 1, SSB2 to represent the beam identifier of beam 2, and SSB3 to represent the beam identifier of beam 3.

The measurement report also includes the cell signal quality of each neighboring cell. Optionally, the measurement report includes the signal quality of each of the first downlink beams. The cell signal quality may be the reference signal received power (RSRP) or the reference signal received quality (RSRQ) of the cell; the beam signal quality may be the RSRP of the downlink beam or RSRQ.

For example, the measurement report also includes the cell signal quality of the neighboring cell 1 and the cell signal quality of the neighboring cell 2; optionally, the measurement report may also include the signal quality of the beam 1 and the signal quality of the beam 2 and The signal quality of beam 3. For the convenience of subsequent description, the following uses RSRP1 to indicate the cell signal quality of the neighboring cell 1, RSRP2 to indicate the signal quality of the cell of the neighboring cell 2; RSRP3 to indicate the signal quality of the beam 1; Signal quality.

In order to enable the network device to learn the signal quality relationship of each beam, in the measurement report, the first beam identifier may be in the order of the corresponding first beam signal quality from high to low or from low to high Sort.

For example, the first beam identifiers are sorted according to the order of the first beam signal quality. In the measurement report, the first beam identifiers are arranged in the order of SSB1, SSB2, and SSB3, indicating that the signal quality of beam 1 is excellent Due to the signal quality of beam 2, the signal quality of beam 2 is better than that of beam 3.

Step 303: The first network device sends a third message to the second network device.

After receiving the measurement report, the first network device makes a handover decision according to the measurement report to determine the target cell. After the target cell is determined, a third message is sent to the second network device. The third message may be a handover request message, and the third message may include at least one second beam identifier.

For example, the first network device determines the neighbor cell 1 as the target cell according to the measurement report, and then sends a third message to the network device to which the neighbor cell 1 belongs. Since the measurement report includes the measurement information of beam 1 and beam 2 of the neighboring cell 1, the third message may include SSB1 and SSB2; optionally, in addition to SSB1 and SSB2, the third message may also include RSRP3 and RSRP4.

Step 304: The second network device allocates uplink transmission resources.

After receiving the third message, the second network device obtains the second beam identifier from the third message; in addition to the second beam identifier, the second network device may also obtain the third message To obtain the second beam signal quality.

When there are multiple second beam identifiers, the second network device may allocate corresponding uplink transmission resources to the beams indicated by each second beam identifier, or may only allocate beams indicated by some second beam identifiers Corresponding upstream transmission resources. The second downlink beam to which the corresponding uplink transmission resource is allocated is the third downlink beam.

In a possible manner, the second network device may determine the third beam identifier according to load or resource conditions and allocate corresponding uplink transmission resources for the third downlink beam indicated by the third beam identifier. Wherein, the third beam identifier is all or part of the second beam identifier. When there are multiple third downlink beams, each third downlink beam is associated with a piece of uplink transmission resource information, and the uplink transmission resource information associated with different third downlink beams may be the same or different. Wherein, the uplink transmission resource information may be the uplink transmission resource itself or the indication information of the uplink transmission resource. That is, the second network device may allocate corresponding uplink transmission resources to the third downlink beam, and the third downlink beam is all or part of the second downlink beam.

In a possible manner, in a specific implementation, the second network device may determine the third downlink beam according to the signal quality of the beam, where the third downlink beam may be all of the second downlink beam or the For a part of the second downlink beam, for example, a second downlink beam whose signal quality is not lower than a predetermined second signal quality threshold value is used as a third downlink beam; and then a corresponding uplink transmission resource is allocated to the third downlink beam.

For example, when the third message includes measurement information of beam 1 and beam 2, in a possible manner, the second network device may allocate corresponding uplink transmission resources for beam 1 and beam 2, respectively. The uplink transmission resource allocated by the second network device to SSB1 may be the same as or different from the uplink transmission resource allocated by the second network device to SSB2. For example, the second network device may allocate the first uplink transmission resource UL to grant1 for SSB1 and SSB2. Allocate the second uplink transmission resource UL grant2; or you can also allocate UL grant1 to both SSB1 and SSB2. In this case, SSB1 and SSB2 are the third beam identifiers. In another possible manner, the second network device may also allocate the first uplink transmission resource UL grant1 only for SSB1, and not allocate the uplink transmission resource for SSB2. In this case, SSB1 is the third Beam identification.

Step 305: The second network device sends the first message to the first network device.

After allocating uplink transmission resources for the third downlink beam, the second network device may send the first message to the first network device. The first message may include a third beam identifier used to indicate the third downlink beam and uplink transmission resource information associated with the third beam identifier. Wherein, the third beam identifier is part or all of the second beam identifier, and the third downlink beam is a beam in the second downlink beam that is allocated uplink transmission resources by the second network device.

For example, if the second network device allocates the first uplink transmission resource UL grant1 to SSB1 and the second uplink transmission resource UL grant2 to SSB2, then SSB1 and SSB2 are the third beam identifiers, and the first message may include {(SSB1, UL Grant1), (SSB2, UL Grant2)}; If the second network device allocates UL Grant1 only for SSB1, but does not allocate uplink transmission resources to SSB2, then SSB1 is the third beam identifier, One message contains {(SSB1, UL Grant1)}.

Optionally, the first message may further include a channel reciprocity indication and / or a signal quality threshold. Generally, when the third beam identifier is not unique, the first message may further include a signal quality threshold, and when the third beam identifier is unique, the first message may not include Signal quality threshold. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication. The terminal device may determine the downlink beam according to the signal quality threshold, for example, the terminal device determines, from the third downlink beam, a beam whose signal quality is not lower than the signal quality threshold as the fourth downlink beam.

Step 306: The first network device sends a second message to the terminal device.

After receiving the first message, the first network device sends a second message to the terminal device, where the second message may include the content contained in the first message.

For example, if the first message contains {(SSB1, UL Grant1), (SSB2, UL Grant2)}, then the second message contains {(SSB1, UL Grant1), (SSB2, UL Grant2))} ; If the first message contains {(SSB1, UL Grant1)}, then the second message contains {(SSB1, UL Grant1)}.

The second message may further include a channel reciprocity indication and / or a signal quality threshold. The channel reciprocity indication and / or the signal quality threshold may be obtained by the first network device from the first message.

Step 307: The terminal device sends an RRC reconfiguration complete message to the second network device.

After receiving the second message, the terminal device may determine the fourth from the third downlink beam according to the third beam identifier, or according to the third beam identifier and the signal quality threshold Downlink beam; then determine the uplink sending direction according to the fourth downlink beam, and use the uplink transmission resource information associated with the fourth downlink beam to send an RRC reconfiguration completion message to the second network device.

When the third beam identifier is unique, the terminal device may directly determine the third downlink beam as the fourth downlink beam, and the third beam identifier is the fourth beam identifier, according to the third The downlink beam determines the uplink transmission direction. Specifically, the uplink sending direction may be determined by the terminal device according to the direction of the third downlink beam. In an implementation manner, the uplink transmission direction may be opposite to the direction of the third downlink beam or the direction formed by the included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the third beam identifier in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

For example, if the second message contains only {(SSB1, UL grant1)}, the terminal device determines the downlink beam indicated by SSB1 as the fourth downlink beam, and determines the uplink transmission direction according to SSB1. Specifically, the uplink transmission direction may be determined by the terminal device according to the direction of SSB1, for example, the uplink transmission direction may be opposite to the downlink direction in which the terminal device receives SSB1 sent by the second network device, or may be formed by the downlink direction The included angle is within a predetermined range. In this way, the terminal device may use the uplink transmission resource information UL Grant1 associated with SSB1 in the uplink sending direction to send the RRC reconfiguration completion message to the second network device.

When the third beam identifier is not unique, the terminal device determines a fourth downlink beam from the third downlink beam according to the signal quality threshold. Specifically, the terminal device may determine a beam whose signal quality is not lower than the signal quality threshold among the third downlink beams as the fourth downlink beam, and determine the uplink transmission direction according to the fourth downlink beam. In an implementation manner, the uplink sending direction may be opposite to the direction of the fourth downlink beam or the direction formed by the included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the beam identifier of the fourth downlink beam in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

The fourth downlink beam is one of the third downlink beams. If there are multiple beams with a signal quality not lower than the signal quality threshold in the third downlink beam, the fourth downlink beam may be the beam with the strongest signal quality among the third downlink beams , Or it may be any one of the third downlink beams whose signal quality is not lower than the signal quality threshold, or may be the third of the third downlink beams whose signal quality is not lower than the signal quality threshold The first beam in the downlink beam that is detected by the terminal device.

For example, if the second message includes {(SSB1, UL Grant1), (SSB2, UL Grant2)} and the signal quality threshold X, then the terminal device selects from the two downlink beams indicated by SSB1 and SSB2, A beam in which the signal quality is not lower than X is determined as the fourth downlink beam. For example, if the terminal device determines the downlink beam indicated by SSB1 whose measured signal quality is not lower than X as the fourth downlink beam, then the terminal device will have a direction opposite to the fourth downlink beam or an included angle The direction within the predetermined range is determined as the upstream transmission direction. In this way, the terminal device may use the uplink transmission resource UL grant1 associated with SSB1 in the uplink sending direction to send the RRC reconfiguration completion message to the second network device.

Using the communication method provided in this embodiment, the second network device may allocate uplink transmission resources for sending RRC reconfiguration complete messages to the terminal device, and then send the uplink transmission resource information to the terminal device through the first network device The terminal device may use the determined uplink transmission resource to send the RRC reconfiguration completion message.

Referring to FIG. 4, it is a schematic flowchart of another embodiment of the communication method of the present application. This embodiment may include the following steps:

Step 401: The first network device sends an RRC reconfiguration message to the terminal device.

The RRC reconfiguration message contains measurement configuration information. For details, refer to step 301, which will not be described in detail here.

Step 402: The terminal device sends a measurement report to the first network device.

After receiving the RRC reconfiguration message, the terminal device performs radio resource management (RRM) measurement on the downlink reference signal according to the measurement configuration information; and after the trigger condition is met, the terminal device Send a measurement report. The content included in the measurement report can be referred to step 302, and will not be described in detail here.

Step 403: The first network device sends a third message to the second network device.

After receiving the measurement report, the first network device makes a handover decision based on the measurement report to determine the target cell; after determining the target cell, sends a third message to the second network device, the third The message may be a handover request message, and the third message may include at least one second beam identifier. The third message may further include a signal quality threshold, and the signal quality threshold is used to determine how to allocate uplink transmission resources. The content contained in the third message may refer to step 303, and will not be described in detail here.

Step 404: The second network device allocates uplink transmission resources.

When there are multiple second beam identifiers, the second network device may allocate corresponding uplink transmission resources to the beams indicated by each second beam identifier, or may only allocate beams indicated by some second beam identifiers Corresponding upstream transmission resources. The second downlink beam to which the corresponding uplink transmission resource is allocated is the third downlink beam. The specific way for the second network device to allocate the uplink transmission resources can be referred to step 304, which will not be repeated here.

It should be noted here that steps 401 to 404 are similar to steps 301 to 304. For related parts, please refer to steps 301 to 304, which will not be described in detail here.

Step 405: The second network device sends the first message to the first network device.

After allocating uplink transmission resources for the third downlink beam, the second network device may send the first message to the first network device. The first message may include a third beam identifier for indicating the third downlink beam, but does not include uplink transmission resource information associated with the beam indicated by the third beam identifier. Wherein, the uplink transmission resource information may be the uplink transmission resource itself or the indication information of the uplink transmission resource.

For example, when the second beam identifier includes SSB1 and SSB2, if the second network device allocates uplink transmission resources for SSB1 and SSB2, then both SSB1 and SSB2 are the third beam identifier, and the first message may be Contains SSB1 and SSB2; if the second network device only allocates uplink transmission resources to SSB1, but does not allocate uplink transmission resources to SSB2, then only SSB1 is the third beam identifier, and the first message includes SSB1.

Optionally, the first message may further include a channel reciprocity indication and / or a signal quality threshold. Generally, when the third beam identifier is not unique, the first message may include a signal quality threshold; and when the third beam identifier is unique, the first message may not include Signal quality threshold. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication. The terminal device may determine the fifth downlink beam according to the signal quality threshold, for example, the terminal device determines, from the third downlink beam, a beam whose signal quality is not lower than the signal quality threshold as the first Five downlink beams, wherein the fifth downlink beam is a downlink beam that the terminal device needs to monitor, and the fifth downlink beam is one of the third beams.

It should be noted here that for the similarities between step 405 and step 305, please refer to step 305, which will not be repeated here.

Step 406: The second network device sends instruction information to the terminal device.

In addition to sending the first message to the first network device, after allocating uplink transmission resources, the second network device may send indication information to the terminal device through the third downlink beam. The indication information includes uplink transmission resource information associated with the third beam identifier, and may further include the third beam identifier.

The indication information may be physical signaling, such as a physical downlink control channel (physical downlink control channel, PDCCH) order, or may also be layer 2 control signaling, such as medium access control (MAC) control. Element (control element), or RRC message. The uplink transmission resource may be UL grant or PUSCH resource. The uplink transmission resource may be periodic or aperiodic.

When there are multiple third beam identifiers, the second network device needs to send the corresponding indication information on each third downlink beam separately.

For example, when the second beam identifier includes SSB1 and SSB2, if the second network device allocates UL grant1 for SSB1 and UL grant2 for SSB2, both SSB1 and SSB2 are the third beam identifier; the second network The device sends first indication information through beam 1 (ie, the beam indicated by SSB1), and sends second indication information through beam 2 (ie, the beam indicated by SSB2). Wherein, the first indication information may include UL grant1, and the second indication information may include UL grant2. In addition to UL grant1, the first indication information may also include SSB1; in addition to UL grant2, the second indication information may also include SSB2.

For another example, if the second network device only allocates uplink transmission resources UL grant1 for SSB1, but does not allocate uplink transmission resources for SSB2, then only SSB1 is the third beam identifier, and the second network device sends the first The three indication information may include UL grant1 associated with SSB1. In addition to UL grant1, the third indication information may also include SSB1.

It should be noted that the present application does not limit the execution order between step 405 and step 406, and the second network device may perform any one of the steps after performing step 404, or may perform the two steps in parallel.

Step 407: The first network device sends a second message to the terminal device.

After receiving the first message, the first network device sends a second message to the terminal device. The second message may include the content contained in the first message.

For example, if the first message includes SSB1 and SSB2, then the second message also includes SSB1 and SSB2; if the first message includes SSB1, then the second message also includes SSB1.

It should be noted that the application does not limit the execution order between step 406 and step 407.

Step 408: The terminal device sends an RRC reconfiguration complete message to the second network device.

After receiving the second message, the terminal device determines a fifth downlink beam from the third downlink beam according to the third beam identifier and an optional signal quality threshold, and then monitors the second network Indication information sent by the device at the fifth downlink beam to obtain uplink transmission resource information and determine the uplink transmission direction. After the uplink transmission direction and the uplink transmission resource information are determined, the terminal device may use the uplink transmission resource information to send an RRC reconfiguration completion message in the uplink transmission direction.

When the third beam identifier is unique, the terminal device may determine the third downlink beam as the fifth downlink beam, monitor indication information at the fifth downlink beam, and obtain uplink transmission from the indication information Resource information, and determine the upstream sending direction. Specifically, the uplink sending direction may be opposite to the direction of the fifth downlink beam or the direction formed by the included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the fifth downlink beam included in the indication information in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

For example, if the second message contains only {SSB1}, the terminal device determines the downlink beam indicated by SSB1, that is, beam 1, as the fifth downlink beam, and the terminal device monitors the indication information sent on beam 1, For example, the terminal device monitors the PDCCH, acquires the uplink transmission resource UL grant1 associated with SSB1 from the indication information, and determines the uplink transmission direction. The uplink transmission direction may be determined by the terminal device according to the direction of beam 1, for example, the uplink transmission direction may be opposite to the downlink direction in which the terminal device receives beam 1 sent by the second network device, or may be sandwiched with the downlink direction The angle is within a predetermined range. In this way, the terminal device may use UL grant1 in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

When the third beam identifier is not unique, then the terminal device determines a fifth downlink beam from the third downlink beam according to the signal quality threshold. Specifically, the terminal device may determine a beam whose signal quality is not lower than the signal quality threshold value in the third downlink beam as the fifth downlink beam, and the terminal device monitors the indication information at the fifth downlink beam, and then The uplink transmission resource information is obtained from the indication information, and the indication information may further include a beam identifier of the fifth downlink beam. In addition, the terminal device determines an uplink transmission direction. Specifically, the uplink sending direction may be opposite to the direction of the fifth downlink beam or the direction formed by the included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the fifth downlink beam included in the indication information in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

Wherein, the fifth downlink beam may be one of the third downlink beams. If there are multiple beams whose signal quality is not lower than the signal quality threshold in the third downlink beam, the fifth downlink beam determined by the terminal device may be a signal in the third downlink beam The beam with the strongest quality may be either one of the third downlink beams whose signal quality is not lower than the signal quality threshold, or the signal whose quality is not lower than the signal quality threshold The first beam detected by the terminal device in the third downlink beam.

For example, if the second message includes SSB1 and SSB2 and the signal quality threshold X, the terminal device determines the fifth downlink beam from beam 1 and beam 2 according to the signal quality threshold X, for example, if beam 1 The signal quality of is not lower than the signal quality threshold X, then beam 1 can be determined as the fifth downlink beam.

For another example, if the second message includes SSB1 and SSB2 and a signal quality threshold value X, the terminal device may determine one of beam 1 and beam 2 whose signal quality is not lower than X as the fifth downlink beam. For example, if the signal quality of beam 1 is not lower than X, the terminal may determine beam 1 as the fifth downlink beam, and the terminal device monitors the indication information at beam 1, and obtains the association with beam 1 from the indication information UL grant1, the uplink transmission direction may be determined by the terminal device according to the direction of beam 1, for example, the uplink transmission direction may be opposite to the downlink direction in which the terminal device receives beam 1 sent by the second network device, or may be different from the beam The angle formed by the downward direction of 1 is within a predetermined range. In this way, the terminal device may use UL grant1 in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

Using the communication method provided in this embodiment, the second network device may allocate uplink transmission resources for sending the RRC reconfiguration complete message to the terminal device, and then notify the terminal of the beam identifier used for sending the indication information through the first network device Device, the second network device sends the indication information through the beam indicated by the beam identifier, the indication information includes uplink transmission resource information, so that the terminal device can use the determined uplink transmission resource to send the RRC reconfiguration Complete the message.

Referring to FIG. 5, it is a schematic flowchart of another embodiment of the communication method of the present application. The embodiment of the present application may include the following steps:

Step 501: The first network device sends an RRC reconfiguration message to the terminal device.

The RRC reconfiguration message may include measurement configuration information and SRS configuration information used for RRM measurement. In a possible manner, in an application scenario where there is no channel reciprocity between the uplink channel and the downlink channel, the RRC reconfiguration message may include the measurement configuration information used by the terminal device to perform RRM measurement, and the SRS configuration information. The SRS configuration information is used to configure parameters required by the terminal device to send an SRS to the neighboring network device.

The SRS configuration information includes one or more of SRS identification (such as SRS index or SRS ID, etc.), type information of SRS resources, SRS resource configuration, and SRS spatial relationship information. Optionally, the SRS configuration information further includes a cell radio network temporary identifier (C-RNTI) allocated by the neighboring network device to the terminal device and TA information of the neighboring cell, for example, when the neighboring cell is a small cell , The TA information of the neighboring cell is used to indicate that the TA value of the neighboring cell is equal to 0, and when the neighboring cell and the serving cell belong to the same network device, the TA information of the neighboring cell is used to indicate the neighboring cell The TA value of the zone is equal to the TA value of the serving cell.

In a possible implementation manner, during the Xn Setup process or the NG-RAN Node configuration update process, the neighboring network device sends the SRS configuration information to the first network device, and the first network device receives the SRS configuration information And send the SRS configuration information to the terminal device.

In another possible implementation manner, the first network device generates the SRS configuration information, sends the SRS configuration information to a terminal device, and sends the SRS configuration information to a neighboring network device through an Xn message, the Xn messages can be new messages, or reuse existing messages, such as Xn setup request message or NG-RAN Node configuration update message or others. After receiving the SRS configuration information, the terminal device generates an SRS according to the SRS configuration information, and sends the SRS to the neighboring network device.

Step 502: The terminal device sends a measurement report to the first network device.

After receiving the RRC reconfiguration message, the terminal device performs RRM measurement on the downlink reference signal according to the measurement configuration information; and after the trigger condition is satisfied, sends a measurement report to the first network device. The content included in the measurement report may refer to the foregoing embodiment, and specific reference may be made to related content such as step 302, which will not be described in detail here.

Step 503: The terminal device sends the first SRS according to the SRS configuration information.

Since the RRC reconfiguration message includes the SRS configuration information, the terminal device also needs to generate an uplink reference signal SRS according to the SRS configuration information, and send the SRS in at least one uplink beam. In a case where a terminal device uses multiple uplink beams to transmit SRS, SRSs transmitted on different uplink beams may have different SRS indexes or SRS IDs.

For example, the terminal device may send the SRS labeled SRS1 on the uplink beam 1, the SRS labeled SRS2 on the uplink beam 2, and the SRS labeled SRS3 on the uplink beam 3.

It should be noted that the present application does not limit the execution order between step 502 and step 503, and the terminal device may execute any one of the steps first, or may execute the two steps in parallel.

Step 504: The first network device sends a third message to the second network device.

After receiving the measurement report, the first network device makes a handover decision based on the measurement report, determines the target cell, and sends a third message to the second network device. For details, see step 303 and other related content. This will not be repeated here.

Step 505: The second network device allocates uplink transmission resources.

The second network device allocates the uplink transmission resource associated with the uplink beam identifier based on the received first SRS sent by the terminal device.

In an implementation manner, the second network device may perform uplink measurement based on the received first SRS sent by the terminal device, perform admittance control based on the uplink measurement result and its own load or resource conditions, and allocate the second SRS Associated uplink transmission resources, where the second SRS may be all or part of the first SRS. The uplink beam identifier indicates the second SRS, and an uplink transmission resource is allocated to the second SRS, that is, an uplink transmission resource associated with the uplink beam identifier is allocated.

The uplink beam indicated by the uplink beam identifier is part or all of the uplink beam that the terminal device sends the first SRS. Generally speaking, the second network device allocates uplink transmission resources to a predetermined number of the first SRSs with good uplink measurement results or first SRSs with uplink measurement results higher than a predetermined threshold.

The uplink transmission resources allocated by the second network device to different uplink beam identifiers may be the same or different. For example, if the second network device receives SRS1, SRS2, and SRS3 sent by the terminal device, the second network device finds that the measurement result of SRS1 is the best and the measurement result of SRS2 is the second according to the uplink measurement result. Then, the second network device may be SRS1 allocates a first uplink transmission resource and SRS2 allocates a second uplink transmission resource. The first uplink transmission resource may be the same as or different from the second uplink transmission resource. Alternatively, the second network device may allocate the first uplink transmission resource UL grant1 only for SRS1 with the best signal quality, and not allocate the uplink transmission resource for SRS2.

It should be noted that the present application does not limit the execution order between step 504 and step 505, and the terminal device may perform any one of the steps first, or may execute the two steps in parallel.

Step 506: The second network device sends the first message to the first network device.

After allocating uplink transmission resources for the uplink beam indicated by the uplink beam identifier, the second network device may send a first message to the first network device, where the first message may include the SRS identifier and the SRS identifier. Linked uplink transmission resource information. Wherein, the uplink transmission resource information may be the uplink transmission resource itself or the indication information of the uplink transmission resource.

For example, if the second network device allocates the first uplink transmission resource UL grant1 to SRS1 with the best signal quality, then the first message may include the SRS identifier of SRS1 and the uplink transmission resource information associated with the SRS identifier.

The first message may also include an indication of channel reciprocity. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication.

Step 507: The first network device sends a second message to the terminal device.

After receiving the first message, the first network device sends a second message to the terminal device, where the second message may include the content contained in the first message. That is, the second message may include an SRS identifier and uplink transmission resource information associated with the SRS identifier. For example, if the first message includes the SRS identifier of SRS1 and the uplink transmission resource information associated with the SRS identifier, then the second message also includes the SRS identifier of SRS1 and the uplink transmission associated with the SRS identifier Resource information.

The second message may also include an indication of channel reciprocity. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication.

Step 508: The terminal device sends an RRC reconfiguration complete message to the second network device.

After receiving the second message, the terminal device determines an uplink transmission direction according to the SRS identifier included in the second message. Specifically, the uplink transmission direction may be indicated by the terminal device according to the SRS identifier The direction of the upstream beam is determined. In a possible manner, the uplink sending direction may be the same as the direction of the uplink beam or a direction with an included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the SRS identifier contained in the second message in the uplink sending direction to send the RRC reconfiguration completion message to the second network device.

For example, if the second message includes the SRS identifier of SRS1 and the uplink transmission resource information UL grant1 associated with the SRS identifier, the terminal device may use UL grant1 in the same direction or direction as the uplink beam in which the SRS1 is sent. Send the RRC reconfiguration complete message to the second network device in the direction where the included angle is within a predetermined range; if the second message includes the SRS identifier of SRS1 and the uplink transmission resource information UL associated with the SRS identifier grant1, which also contains the SRS identifier of SRS2 and the uplink transmission resource information UL grant2 associated with the SRS identifier, then the terminal device may use UL grant1 in the same direction as the uplink beam sending the SRS1 or the included angle is within a predetermined range In the internal direction, send the RRC reconfiguration complete message to the second network device, or the terminal device may also use UL grant2 in the direction that is the same as the direction of the uplink beam that sends the SRS2 or the included angle is within a predetermined range On the above, the RRC reconfiguration completion message is sent to the second network device.

Using the communication method provided in this embodiment, the second network device may allocate uplink transmission resources for sending the RRC reconfiguration complete message to the terminal device, and then send the uplink transmission resource information to the terminal device through the first network device. The terminal device may use the determined uplink transmission resource to send the RRC reconfiguration completion message.

Refer to FIG. 6, which is a schematic flowchart of another embodiment of the communication method of the present application. The communication method may include the following steps:

Step 601: The first network device sends an RRC reconfiguration message to the terminal device.

The RRC reconfiguration message may include measurement configuration information for RRM measurement and SRS configuration information.

Step 602: The terminal device sends a measurement report to the first network device.

After receiving the RRC reconfiguration message, the terminal device performs RRM measurement on the downlink reference signal according to the measurement configuration information; and after the trigger condition is satisfied, sends a measurement report to the first network device. The content included in the measurement report may refer to the foregoing embodiment, and will not be described in detail here. Refer to step 203 for details.

Step 603: The terminal device sends the first SRS according to the SRS configuration information.

Since the RRC reconfiguration message includes the SRS configuration information, the terminal device also needs to generate an uplink reference signal SRS according to the SRS configuration information, and send the SRS in at least one uplink beam. In a case where the terminal device uses multiple uplink beams to transmit SRS, the SRSs transmitted on different uplink beams may have different SRS identifiers.

It should be noted here that steps 601 to 603 are similar to steps 501 to 503. For related parts, refer to steps 501 to 503, which will not be described in detail here.

Step 604: The first network device sends a third message to the second network device.

After receiving the measurement report, the first network device makes a handover decision according to the measurement report, determines the target cell, and sends a third message to the second network device, where the third message may include at least one Second beam identification. The second beam identifier is used to indicate a second downlink beam, and the second downlink beam is a downlink beam belonging to the second network device. When there are multiple first downlink beams, the second downlink beam may include all of the first downlink beams, or may include only part of the first downlink beams. For details, refer to step 204, and no more details are provided.

Step 605: The second network device allocates uplink transmission resources.

The second network device allocates uplink transmission resources based on the received first SRS sent by the terminal device. The specific allocation method of the uplink transmission resources can be referred to step 505, and will not be described in detail here.

It should be noted that the present application does not limit the execution order between step 604 and step 605, and the terminal device may execute any one of the steps first, or may execute the two steps in parallel.

Step 606: The second network device sends the first message to the first network device.

The second network device may send a first message to the first network device, and the first message may include a third beam identifier.

For example, when the second beam identifier includes SSB1 and SSB2, and the signal quality of SSB1 is better than that of SSB2, then, in one way, the first message includes the beam identifier of beam 1, that is, SSB1 is The third beam identifier. In another manner, the first message includes the beam identifier of beam 1 and the beam identifier of beam 2, that is, SSB1 and SSB2 are the third beam identifier.

The first message may also include a channel reciprocity indication and / or a signal quality threshold. Generally, when the third beam identifier is not unique, the first message may include a signal quality threshold; when the third beam identifier is unique, the first message does not include a signal quality gate Limit. The terminal device may determine whether the current application scenario has channel reciprocity according to the channel reciprocity indication. The terminal device may determine the fifth downlink beam according to the signal quality threshold, for example, the terminal device determines, from the third downlink beam, a beam whose signal quality is not lower than the signal quality threshold as the first Five downlink beams, wherein the fifth downlink beam is a downlink beam that the terminal device needs to monitor, and the fifth downlink beam is one of the third downlink beams.

Step 607: The second network device sends indication information through the third downlink beam.

In addition to sending the first message to the first network device, the second network device sends indication information through the third downlink beam. The indication information includes an SRS identifier and uplink transmission resource information associated with the SRS identifier. The indication information may be physical signaling, such as PDCCH order, or the indication information may be layer 2 control signaling, such as MAC CE, or the indication information may be an RRC message.

When there are multiple third beam identifiers, the second network device may separately send indication information at each third downlink beam.

For example, if the second network device allocates the first uplink transmission resource UL grant1 to SRS1 with the best signal quality, then the indication information may include the SRS identifier of SRS1 and the uplink transmission resource information associated with the SRS identifier. If the second network device determines SSB1 as the third beam identifier according to the second beam identifier included in the third message, the first message sent by the second network device includes the beam 1 Beam identification, then the second network device sends the indication information at the downlink beam whose beam identification is SSB1, that is, beam 1; if the second network device uses the second beam identification included in the third message, SSB1 and SSB2 are determined as the third beam identifier, and the first message sent by the second network device includes the beam identifier of beam 1 and the beam identifier of beam 2, that is, the first message included in the first message The three beam identifiers are SSB1 and SSB2, then the second network device sends indication information 1 at the downlink beam whose beam identifier is SSB1, that is, beam 1, and the indication information 1 may include the SRS identifier of SRS1 and the uplink associated with the SRS identifier Transmission resource information, and the second network device sends the indication information 2 at the downlink beam whose beam identifier is SSB2, that is, beam 2, and the indication information 2 may include the SRS identifier of SRS1 and the SRS. Uplink transmission resource information associated sensible.

It should be noted that the present application does not limit the execution order between step 604 and step 607.

Step 608: The first network device sends a second message to the terminal device.

After receiving the first message, the first network device sends a second message to the terminal device, where the second message includes the third beam identifier. The second message may include the content contained in the first message. For details, refer to step 407, and details are not described again.

Step 609: The terminal device sends an RRC reconfiguration complete message to the second network device.

After receiving the second message, the terminal determines the fifth downlink beam according to the third beam identifier included in the second message and the optional signal quality threshold, and monitors the third In the indication information sent at the five downlink beams, after listening to the indication information, the terminal device obtains the SRS identifier and the uplink transmission resource information associated with the SRS identifier from the indication information. Determine the uplink transmission direction according to the SRS identifier included in the indication information, specifically, the uplink transmission direction may be determined by the terminal device according to the direction of the uplink beam indicated by the SRS identifier. In one implementation, The uplink sending direction may be the same as the direction of the uplink beam or a direction with an included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the SRS identifier included in the indication information in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

When the third beam identifier includes multiple, if the second message further includes a signal quality threshold value, the terminal device determines a fifth downlink beam from the third downlink beam according to the signal quality threshold value.

When the third beam identifier is unique, the terminal device determines the third downlink beam as the fifth downlink beam, and the terminal device monitors indication information at the fifth downlink beam. After listening to the indication information, the terminal device acquires the SRS identifier and the uplink transmission resource information associated with the SRS identifier from the indication information. The terminal device determines the uplink transmission direction according to the SRS identifier included in the indication information. Specifically, the uplink transmission direction may be determined by the terminal device according to the direction of the uplink beam indicated by the SRS identifier, in an implementation manner In the above, the uplink sending direction may be the same as the direction of the uplink beam or a direction with an included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the SRS identifier included in the indication information in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

For example, if the second message contains only {SSB1}, the terminal device determines the downlink beam indicated by SSB1 as the fifth downlink beam, and the terminal device monitors the indication information sent on SSB1. If in step 605, the second network device allocates the first uplink transmission resource UL grant1 only for SRS1. Then, the terminal device acquires uplink transmission resource information UL grant1 associated with SRS1 from the indication information, and determines the uplink transmission direction. The uplink transmission direction is the same as the uplink beam direction in which the SRS1 is transmitted or the included angle is within a predetermined range. In this way, the terminal device may use UL grant1 in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

When the third beam identifier is not unique, the second message also includes the signal quality threshold, then the terminal device determines a fifth downlink beam from the third downlink beam according to the signal quality threshold . Specifically, the terminal device may determine, among the third downlink beams, a beam whose signal quality is not lower than the signal quality threshold as the fifth downlink beam, and the terminal device monitors the indication information at the fifth downlink beam. After listening to the indication information, the terminal device acquires the SRS identifier and the uplink transmission resource information associated with the SRS identifier from the indication information. The terminal device determines the uplink transmission direction according to the SRS identifier included in the indication information. Specifically, the uplink transmission direction may be determined by the terminal device according to the direction of the uplink beam indicated by the SRS identifier, in an implementation manner In the above, the uplink sending direction may be the same as the direction of the uplink beam or a direction with an included angle within a predetermined range. In this way, the terminal device may use the uplink transmission resource information associated with the SRS identifier included in the indication information in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

For example, if the second message includes the beam identifier of beam 1 and the beam identifier of beam 2, and the signal quality threshold value X, then the terminal device according to the signal quality threshold value X, from beam 1 and beam 2, will A beam whose signal quality is not lower than X is determined as the fifth downlink beam. For example, if the terminal device detects that the signal quality of beam 1 is not lower than X, then beam 1 may be determined as the fifth downlink beam, and the terminal device monitors the indication information at beam 1. If in step 605, the second network device only allocates the first uplink transmission resource UL grant1 for SRS1, the indication information sent by the second network device through beam 1 includes the SRS identifier of SRS1 and the uplink transmission resource information associated with the SRS identifier . Then, the terminal device acquires uplink transmission resource information UL grant1 associated with SRS1 from the indication information, and determines the uplink transmission direction. The uplink transmission direction is the same as the uplink beam direction in which the SRS1 is transmitted or the angle formed is within a predetermined range. In this way, the terminal device may use UL grant1 in the uplink transmission direction to send the RRC reconfiguration completion message to the second network device.

Using the communication method provided in this embodiment, the second network device may allocate uplink transmission resources for sending the RRC reconfiguration complete message to the terminal device, and then notify the terminal of the beam identifier used to send the indication information to the terminal through the first network device Device, and send the indication information through the beam indicated by the beam identifier, the indication information includes an SRS identifier and uplink transmission resource information associated with the SRS identifier, so that the terminal device can use the determined Sending the RRC reconfiguration complete message by using the uplink transmission resource.

It can be understood that, in the above embodiments, the method implemented by the terminal device may also be implemented by components (such as chips or circuits) that can be used for the terminal device; the method implemented by the first network device may also be implemented by The components of the first network device (such as chips or circuits) are implemented; the method implemented by the second network device may also be implemented by components (such as chips or circuits, etc.) that can be used in the second network device.

7 is a schematic structural diagram of an embodiment of a communication device of the present application. The communication device may be a first network device or a component (such as a chip) that can be used for the first network device, or the communication device may also be a second network device or a component that can be used for the second network device. The communication apparatus may implement the function or operation of the first network device in the foregoing embodiments, or may implement the function or operation of the second network device in the foregoing embodiments. As shown in FIG. 7, the communication device may include an acquisition module 701 and a sending module 702. Optionally, the communication device may also include a generation module or other necessary unit modules.

In an implementation manner, when the communication apparatus is used to implement an operation or function corresponding to the first network device, the acquiring module 701 is configured to acquire a beam identifier and uplink transmission resource information associated with the beam identifier, The uplink transmission resource information is used to transmit a radio resource control RRC reconfiguration completion message; the sending module 702 is used to send a second message to a terminal device, where the second message includes the beam identifier and the uplink transmission resource information. Optionally, the sending module 702 is further configured to send sounding reference signal SRS configuration information to the terminal device, where the SRS configuration information is used to configure parameters required by the terminal device to send SRS to the second network device. Optionally, the second message further includes a channel reciprocity indication and / or a signal quality threshold. Optionally, the beam identification includes SSB index or CSI-RS index; or, the beam identification includes SRS identification.

In another implementation manner, when the communication apparatus is used to implement the operation or function corresponding to the second network device, a generating module is used to generate the first message; a sending module 702 is used to send to the first network device The first news. Wherein, the first message includes a beam identifier, which is used to indicate part or all of the beams measured by the terminal device that belong to the communication device, and the beam indicated by the beam identifier is used to determine the uplink Transmission resource information, where the uplink transmission resource information is used to transmit a radio resource control RRC reconfiguration complete message, the first network device is a network device to which the serving cell belongs, and the communication device is a network device to which the target cell belongs.

Optionally, the first message further includes uplink transmission resource information associated with the beam identification, and the uplink transmission resource information is used to transmit a radio resource control RRC reconfiguration completion message.

Optionally, the sending module 702 is further configured to send indication information in the downlink beam indicated by the beam identifier, where the indication information includes uplink transmission resource information associated with the beam identifier.

Optionally, the beam identifier includes SSB index or CSI-RS index. Optionally, the first message further includes a channel reciprocity indication and / or a signal quality threshold.

It can be understood that, for the function or implementation of each module of the communication apparatus in the embodiments of the present application, reference may be made to the related description in the method embodiments, and details are not described herein again.

Referring to FIG. 8, it is a schematic structural diagram of an embodiment of another communication device of the present application. The communication device may be a terminal device or a component (such as a chip or a circuit) that can be used for the terminal device. The terminal device may be the terminal device in any of the foregoing embodiments. As shown in FIG. 8, the communication device may include a receiving module 801 and a sending module 802. Optionally, the communication device may further include a generating module, an obtaining module, or other necessary unit modules.

Wherein, when the communication apparatus is used to implement operations or functions corresponding to the terminal device, the receiving module 801 is configured to receive a message including a beam identification from the first network device. The message including the beam identification may be a first message, and the first message includes the beam identification. The sending module 802 is configured to use the uplink transmission resource information determined according to the beam identifier to send an RRC reconfiguration completion message to the second network device.

Optionally, the beam identifier includes SSB index or CSI-RS index.

Optionally, the sending module 802 is further configured to use the uplink transmission resource information associated with the beam identifier to send an RRC reconfiguration completion message to the second network device, where the beam identifier is used to indicate the downlink beam .

Optionally, the uplink transmission resource information associated with the beam identifier is obtained by the terminal device from the first message.

Optionally, the uplink transmission resource information associated with the beam identifier is obtained by the terminal device from indication information, and the indication information is obtained by the terminal device listening on the beam.

Optionally, the obtaining module is configured to obtain the SRS identifier and the uplink transmission resource information associated with the SRS identifier from the indication information, the indication information is obtained by the terminal device listening on the beam; the sending The module is further configured to use the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device.

Optionally, the signal quality of the downlink beam indicated by the beam identifier is not lower than a signal quality threshold; the signal quality threshold is obtained by the terminal device from the second message.

Optionally, the beam identifier includes an SRS identifier; the first message includes uplink transmission resource information associated with the SRS identifier.

Optionally, the sending module 802 is further configured to use the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device.

Optionally, the receiving module 801 is further configured to receive sounding reference signal SRS configuration information from the first network device, where the SRS configuration information is used to configure the terminal device to send the SRS to the second network device. Required parameters; the sending module is further configured to send an SRS to the second network device according to the SRS configuration information.

Referring to FIG. 9, it is a schematic structural diagram of an embodiment of a communication device of the present application. The communication device may be a first network device or a component (for example, a chip) that can be used for the first network device, or the communication device may also be a second network device or a component that can be used for the second network device. The communication apparatus may implement the function or operation of the first network device in the foregoing embodiments, or may implement the function or operation of the second network device in the foregoing embodiments.

Wherein, the communication device may be composed of a processor 901 and a transceiver 902, and further, may further include a memory 903. The memory 903 may be used to store code or data.

The processor 901 can use various interfaces and lines to connect various parts of the entire communication device, execute or execute the software programs or modules stored in the memory, and call the codes or data stored in the memory 903 to execute each of the communication devices Functions or process data. The processor 901 may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP. The processor may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device (CPLD), field programmable gate array (FPGA), general array logic (GAL) or any combination thereof.

The memory 903 may include volatile memory (volatile memory), such as random access memory (random access memory, RAM); and may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory), Hard disk (HDD) or solid-state drive (SSD); the memory 903 may also include a combination of the above-mentioned types of memory. A program, code, or data may be stored in the memory, and the processor 9001 in the communication device may implement the function of the communication device by executing the program or code.

The transceiver 902 may be used to receive or transmit signals. For example, the transceiver 902 may send signals or data to a terminal device or other communication device under the control of the processor 901, or receive signals or data sent by a terminal device or other communication device.

In the embodiments of the present application, the processor 901 and the transceiver 902 may be individually or coupled to implement all or part of the steps in the communication method in the foregoing method embodiments. For example, when the communication apparatus serves as the first network device in the foregoing embodiment, the processor 901 may acquire the beam identifier and the uplink transmission resource information associated with the beam identifier, or the transceiver identifier 902 may also be used to obtain the beam identifier and Uplink transmission resource information associated with the beam identifier, and sending the second message to the terminal device. For example, the processor 901 may acquire the beam identifier and the uplink transmission resource information, or the transceiver 902 may receive the first message containing the beam identifier and the uplink transmission resource information, and the second The message may be generated by the processor 901. As another example, when the communication apparatus serves as the second network device in the foregoing embodiment, the processor 901 may be used to generate the first message, and the transceiver 902 may be used to send to the first network device The first message.

The functions to be implemented by the receiving module 701 and the sending module 702 in FIG. 7 may be implemented by the transceiver 902 of the communication device or the transceiver 902 controlled by the processor 901, and the functions to be implemented by the generating module may be The processor 901 is implemented.

Referring to FIG. 10, it is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device may be the terminal device in the foregoing embodiment, or may be a component (such as a chip) that can be used for the terminal device. The communication apparatus can realize the function or operation of the terminal device in the foregoing embodiments.

As shown in FIG. 10, the communication device may include a processor 1001 and a transceiver 1002; further, it may further include a memory 1003, which may be used to store code or data. The transceiver 1002 may include a receiver 1021, a transmitter 1022, an antenna 1023 and other components. The communication device may further include more or less components, or combine some components, or arrange different components, which is not limited in this application.

The processor 1001 is the control center of the communication device, and uses various interfaces and lines to connect the various parts of the entire communication device, by running or executing the software program or module stored in the memory 1003, and calling the data stored in the memory 122 to Perform various functions of the communication device or process data. The processor 1001 may be composed of an integrated circuit (IC), for example, may be composed of a single packaged IC, or may be composed of multiple packaged ICs connected with the same function or different functions. For example, the processor 1001 may include only a central processing unit (CPU), or may be a GPU, a digital signal processor (DSP), and a control chip (such as a baseband chip) in the transceiver module The combination. In various embodiments of the present application, the CPU may be a single computing core, or may include multiple computing cores.

The transceiver 1002 is used to establish a communication channel for the communication device to connect to a network device through the communication channel, thereby achieving communication transmission between the communication device and other devices. Wherein, the transceiver 1002 may be a module that completes the transceiver function. For example, the transceiver 1002 may include a communication module such as a wireless local area network (WLAN) module, a Bluetooth module, a baseband module, and a radio frequency (RF) circuit corresponding to the communication module. Used for wireless local area network communication, Bluetooth communication, infrared communication, and / or cellular communication system communication, such as wideband code division multiple access (WCDMA) and / or high speed downlink packet access packet, access, HSDPA). The transceiver is used to control the communication of various components in the communication device, and can support direct memory access.

In different implementations of the present application, the various transceiver modules in the transceiver 1002 generally appear in the form of integrated circuits (integrated circuits) chips and can be selectively combined without having to include all transceiver modules and corresponding Antenna group. For example, the transceiver 1002 may only include a baseband chip, a radio frequency chip, and a corresponding antenna to provide communication functions in a cellular communication system. A communication connection established via a transceiver, such as wireless local area network access or WCDMA access, the communication device may be connected to a cellular network or the Internet. In some optional embodiments of the present application, the communication module in the transceiver, for example, the baseband module can be integrated into the processor, typically a platform such as APQ + MDM series provided by Qualcomm. The radio frequency circuit is used to receive and send signals during information transceiving or talking. For example, after receiving the downlink signal of the network device, it is processed by the processor; in addition, the uplink data is sent to the network device. Generally, the radio frequency circuit includes well-known circuits for performing these functions, including but not limited to antenna systems, radio frequency transceivers, one or more amplifiers, tuners, one or more oscillators, digital signal processors, codecs (codec) chipset, subscriber identity module (SIM) card, memory, etc. In addition, the radio frequency circuit can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to global mobile communication system (global system of mobile communication (GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access (CDMA), wideband code division multiple access (wideband code division multiple access (WCDMA), high speed uplink packet access technology (high speed uplink link access (HSUPA)), long term evolution (long term evolution (LTE) , Email, short messaging service (SMS), etc.

In the embodiments of the present application, the transceiver 1002 may be used to implement all or part of the steps of the data transmission method in the foregoing embodiments. The functions to be implemented by the receiving module 801 and the sending module 802 in FIG. 8 may be implemented by the transceiver 1002 of the communication device or the transceiver 1002 controlled by the processor 1001, and the functions to be implemented by the acquiring module may The processor 801 is implemented.

In a possible implementation manner, an embodiment of the present application further provides a computer storage medium, where the computer storage medium may store a program, and the program may include the signal transmission method provided by the present application when the program is executed. Part or all of the steps. The storage medium may be a magnetic disk, an optical disk, a read-only memory (read-only memory, ROM) or a random access memory (random access memory, RAM), etc.

In addition, the embodiments of the present application also provide a computer program product containing instructions that, when run on a computer, cause the computer to perform the signal transmission method steps of the foregoing embodiments.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present invention are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), and the like.

The embodiments in this specification are described in a progressive manner. The same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system and device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments.

The above-mentioned embodiments of the present application do not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A communication method, characterized in that it includes:

The first network device acquires a beam identifier and uplink transmission resource information associated with the beam identifier, and the uplink transmission resource information is used to transmit a radio resource control RRC reconfiguration completion message;

The first network device sends a second message to the terminal device, where the second message includes the beam identifier and the uplink transmission resource information.
The method according to claim 1, wherein the first network device acquiring the beam identifier and the uplink transmission resource information associated with the beam identifier includes:

The first network device receives a first message from a second network device, where the first message includes the beam identifier and the uplink transmission resource information, where the first network device is the network device to which the serving cell belongs. The second network device is a network device to which the target cell belongs.
The method according to claim 1 or 2, wherein

The second message also includes a channel reciprocity indication and / or a signal quality threshold.
The method according to any one of claims 1 to 3, characterized in that

The beam identifier includes a synchronization signal block index or a channel state information reference signal index; or,

The beam identification includes an SRS identification.
A communication method, characterized in that it includes:

The second network device generates the first message;

The second network device sends a first message to the first network device, where the first message includes a beam identifier that is used to indicate a part or all of the beams measured by the terminal device that belong to the second network device, The beam indicated by the beam identifier is used to determine uplink transmission resource information, wherein the uplink transmission resource information is used to transmit a radio resource control RRC reconfiguration completion message, the first network device is a network device to which the serving cell belongs, The second network device is a network device to which the target cell belongs.
The method according to claim 5, wherein

The first message also includes uplink transmission resource information associated with the beam identification.
The method of claim 5, further comprising:

The second network device sends indication information in the beam indicated by the beam identification, and the indication information includes uplink transmission resource information associated with the beam identification.
The method according to any one of claims 5 to 7, wherein

The beam identifier includes a synchronization signal block index or a channel state information reference signal index.
The method according to any one of claims 5 to 8, wherein

The first message also includes a channel reciprocity indication and / or a signal quality threshold.
A communication method, characterized in that it includes:

Receiving a message including a beam identification from the first network device;

Use the uplink transmission resource information determined according to the beam identifier to send an RRC reconfiguration completion message to the second network device.
The method of claim 10, wherein

The beam identifier includes a synchronization signal block index or a channel state information reference signal index.
The method according to claim 11, wherein the terminal device uses the uplink transmission resource information determined according to the beam identifier to send the RRC reconfiguration completion message to the second network device, including:

The terminal device uses the uplink transmission resource information associated with the beam identifier to send an RRC reconfiguration completion message to the second network device.
The method of claim 12, wherein:

The uplink transmission resource information associated with the beam identification is acquired by the terminal device from the message including the beam identification.
The method of claim 12, wherein:

The uplink transmission resource information associated with the beam identification is obtained by the terminal device from indication information, and the indication information is obtained by the terminal device listening on the beam indicated by the beam identification.
The method according to claim 14, wherein the terminal device uses the uplink transmission resource information determined according to the beam identifier to send an RRC reconfiguration completion message to the second network device, including:

The terminal device obtains the SRS identifier and the uplink transmission resource information associated with the SRS identifier from the indication information, and the indication information is obtained by the terminal device listening on the beam indicated by the beam identifier;

The terminal device uses the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device.
The method according to any one of claims 13 to 15, wherein

The message including the beam identification further includes a signal quality threshold; the signal quality of the beam indicated by the beam identification is not lower than the signal quality threshold.
The method of claim 10, wherein

The beam identification includes an SRS identification; the message including the beam identification includes uplink transmission resource information associated with the SRS identification.
The method according to claim 17, wherein the terminal device uses the uplink transmission resource information determined according to the beam identifier to send the RRC reconfiguration completion message to the second network device, including:

The terminal device uses the uplink transmission resource information associated with the SRS identifier to send an RRC reconfiguration completion message to the second network device.
The method according to any one of claims 15, 17, or 18, further comprising:

The terminal device receives sounding reference signal SRS configuration information from the first network device;

The terminal device sends an SRS to the second network device according to the SRS configuration information.
A communication device, characterized by comprising a module for implementing the method according to any one of claims 1-4.
A communication device, characterized by comprising a module for implementing the method according to any one of claims 5-9.
A communication device, characterized by comprising a module for implementing the method according to any one of claims 10-19.
A computer-readable storage medium, comprising instructions, which when executed on a computer, implement the method according to any one of claims 1 to 4, or implement any one of claims 5 to 9. Item, or implement the method of any one of claims 10-19.
A computer program product, characterized in that when it is run on a computer, the method according to any one of claims 1 to 4 or the method according to any one of claims 5 to 9 are realized Or implement the method according to any one of claims 10 to 19.