RU2788396C1 - Method and device for random access indication and data carrier - Google Patents

Abstract

FIELD: communication technology.

SUBSTANCE: invention relates to the field of communication technology. The service base station transmits an alarm indicating random access to the terminal. The random access indication alarm is configured to indicate to the terminal of the target antenna panel and/or target beam for transmitting the random access preamble. The terminal receives the random access indication alarm and determines, in accordance with the random access indication alarm, the target antenna panel and/or target beam for transmitting the random access preamble.

EFFECT: ability to provide a high proportion of successful random access attempts in the cellular handover process.

15 cl, 11 dwg

Description

FIELD OF TECHNOLOGY

The disclosure of the present invention relates to the field of communication technology, and more specifically, to a method and apparatus for indicating random access and to a data carrier.

BACKGROUND OF THE INVENTION

The terminal needs to initiate random access to the base station in order to successfully establish a wireless connection with the base station.

According to the standard solution, usually the terminal is equipped with only one antenna panel, and the terminal initiates random access to the base station through the antenna panel. In the New Radio Technology (NR, New Radio) 5G system, both the base station and the terminal can be equipped with a plurality of antenna panels to improve the spatial diversity effect. A plurality of base station antenna panels may belong to the same transceiver node (TRP, Transmitter Reception Point) or different TRPs.

At present, with a plurality of antenna panels in a terminal, there is no complete solution to the problem of initiating random access to a base station.

SUMMARY OF THE INVENTION

According to the disclosure of the present invention, there is provided a method and apparatus for indicating random access, as well as a storage medium. The corresponding technical solution is described below. According to a first aspect of the embodiments of the present invention, a random access indication method is provided. The method includes transmitting, by a serving base station signaling, a random access indication, wherein the random access indication signaling is configured to indicate to the terminal a target antenna array and/or a target beam for transmitting the random access preamble.

Optionally, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

Optionally, the method also includes receiving, by the serving base station, a Radio Resource Management (RRM) measurement report transmitted by the terminal, the RRM measurement report including a measurement report for at least one neighbor cell; selecting by the serving base station a target cell from at least one neighboring cell; transmitting, by the serving base station, handover request signaling to a target base station to which the target cell belongs, the handover request signaling including a measurement report for the target cell; and receiving, by the serving base station, the handover request response signaling transmitted by the target base station, wherein the handover request response signaling includes target antenna panel and/or target beam indication information.

Optionally, the measurement report for the neighbor cell contains: a neighbor cell identifier, a measurement value for the neighbor cell, and measurement object information, wherein the measurement object information is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for neighboring cell.

Optionally, the measurement object information comprises: a receiving antenna panel and/or a receiving beam ID or a receiving antenna panel ID and/or a first reference signal ID, the first reference signal ID being configured to indicate a receiving beam; or a first reference signal group identifier and/or a first reference signal identifier, wherein the first reference signal group identifier is configured to indicate a receiving antenna panel and the first reference signal identifier is configured to indicate a reception beam; or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive antenna panel and/or a receive beam.

Optionally, the handover request signaling includes configuration information of the uplink reference signal used by the terminal for uplink measurements.

Optionally, the method also includes receiving, by the serving base station, candidate panel information transmitted by the terminal, wherein the candidate panel information indicates at least one candidate panel for random access; transmitting, by the serving base station, candidate panel information to the target base station; wherein the target antenna panel is selected from at least one candidate antenna panel.

Optionally, the random access indication signaling is also a radio link recovery instruction or a beam recovery instruction.

Optionally, the method also includes receiving, by the serving base station, a radio link failure notification or a beam failure notification transmitted by the terminal, wherein the radio link failure notification is configured to notify the serving base station of the base station antenna panel in which the radio link failure has occurred, and the beam failure notification is configured to notify the serving base station of the base station's antenna panel in which a beam failure has occurred.

Optionally, the random access indication signaling is a secondary cell adding instruction, and the secondary cell adding instruction is configured to direct the terminal to access the target secondary cell.

Optionally, the method also includes receiving, by the serving base station, a neighbor cell measurement report transmitted by the terminal, wherein the neighbor cell measurement report includes a measurement report for at least one neighbor cell; and selecting, by the serving base station, a target secondary cell from the at least one neighboring cell.

Optionally, the random access indication signaling comprises a target antenna array identifier and/or a target beam identifier; or a target antenna panel identifier and/or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate the target beam; or a second reference signal group identifier and/or a second reference signal identifier, wherein the second reference signal group identifier is configured to indicate a target antenna panel and the second reference signal identifier is configured to indicate a target beam; or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate the target antenna array and/or the target beam.

Optionally, the random access indication signaling also includes antenna panel and/or beam indication information configured to monitor a random access response (RAR) after the terminal transmits a random access preamble.

According to a second aspect of the embodiments of the present invention, a random access indication method is provided. The method includes receiving a random access indication signaling by the terminal and determining by the terminal a target antenna panel and/or a target beam for transmitting a random access preamble based on the random access indication signaling.

Optionally, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

Optionally, the method also includes transmitting, by the terminal, an RRM measurement report to a serving base station, wherein the RRM measurement report includes a measurement report for at least one neighbor cell; the neighbor cell measurement report contains: the neighbor cell identifier, the measurement value for the neighbor cell, and the measurement object information, wherein the measurement object information is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighbor cell .

Optionally, the method also includes: transmitting, by the terminal, candidate panel information to the serving base station, wherein the candidate panel information indicates at least one candidate panel for random access; and the target antenna panel is selected from at least one candidate antenna panel.

Optionally, the random access indication signaling is also a radio link recovery instruction or a beam recovery instruction.

Optionally, the method also includes transmitting, by the terminal, a radio link failure notification or a beam failure notification to a serving base station, wherein the radio link failure notification is configured to notify the serving base station of the base station's antenna panel in which the radio link has failed, and notifying beam failure is configured to notify the serving base station of the base station's antenna panel that has experienced a beam failure.

Optionally, the random access indication signaling is a secondary cell adding instruction, and the secondary cell adding instruction is configured to direct the terminal to access the target secondary cell.

Optionally, the method also includes transmitting, by the terminal, a measurement report for a neighbor cell to a serving base station, wherein the measurement report for a neighbor cell includes a measurement report for at least one neighbor cell; and the target secondary cell is selected from at least one neighboring cell.

According to a third aspect of the embodiments of the present invention, a device for indicating random access is provided. The device is applicable in a serving base station and comprises: an indication signaling transmission module configured to transmit random access indication signaling, wherein the random access indication signaling is configured to indicate to the terminal a target antenna panel and/or a target beam for transmitting a random access preamble.

Optionally, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

Optionally, the device also includes a measurement report receiving module configured to receive an RRM measurement report transmitted by the terminal, wherein the RRM measurement report includes a measurement report for at least one neighbor cell; a target cell selection module, configured to select a target cell from at least one neighbor cell; a handover request transmitting module, configured to transmit handover request signaling to a target base station to which the target cell belongs, the handover request signaling including a measurement report for the target cell; and a handover request response receiving module, configured to receive the handover request response signaling transmitted by the target base station, the handover request response signaling including target antenna panel and/or target beam indication information.

Optionally, the apparatus also comprises a panel information receiving module configured to receive candidate panel information transmitted by the terminal, wherein the candidate panel information is configured to indicate at least one candidate panel antenna for random access; and a panel information transmission module, configured to transmit information about the candidate panel to the target base station; wherein the target antenna panel is selected from at least one candidate antenna panel.

Optionally, the random access indication signaling is also a radio link recovery instruction or a beam recovery instruction.

Optionally, the device also includes a failure notification receiving module configured to receive a radio link failure notification or a beam failure notification transmitted by the terminal, wherein the radio link failure notification is configured to notify the serving base station of the base station antenna panel in which the the radio link failure and the beam failure notification is configured to notify the serving base station of the base station's antenna panel in which the beam failure has occurred.

Optionally, the random access indication signaling is a secondary cell adding instruction, and the secondary cell adding instruction is configured to direct the terminal to access the target secondary cell.

Optionally, the device also includes a neighbor cell report receiving module configured to receive a neighbor cell measurement report transmitted by the terminal, wherein the neighbor cell measurement report includes a measurement report for at least one neighbor cell; and a secondary cell selection module configured to select a target secondary cell from at least one neighboring cell.

According to a fourth aspect of the embodiments of the present invention, a device for indicating random access is provided. The device is applicable in the terminal and comprises an indication signaling receiving module configured to receive random access indication signaling and a panel beam determination module configured to determine a target antenna panel and/or a target beam for transmitting a random access preamble based on the random access indication signaling.

Optionally, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

Optionally, the apparatus also includes a measurement report transmission module configured to transmit an RRM measurement report to a serving base station, the RRM measurement report including a measurement report for at least one neighbor cell; the measurement report for the neighbor cell contains: the neighbor cell identifier, the measurement value for the neighbor cell, and information about the measurement object, while the information about the measurement object is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighbor cell .

Optionally, the apparatus also includes a panel information transmission module configured to transmit candidate panel information to a serving base station, wherein the candidate panel information indicates at least one candidate random access antenna panel; and the target antenna panel is selected from at least one candidate antenna panel.

Optionally, the random access indication signaling is also a radio link recovery instruction or a beam recovery instruction.

Optionally, the device also includes a failure notification transmission module configured to send a radio link failure notification or a beam failure notification to a serving base station, wherein the radio link failure notification is configured to notify the serving base station of the base station antenna panel in which a radio link failure has occurred, and the beam failure notification is configured to notify the serving base station of the base station's antenna panel in which the beam failure has occurred.

Optionally, the random access indication signaling is a secondary cell adding instruction, and the secondary cell adding instruction is configured to direct the terminal to access the target secondary cell.

Optionally, the apparatus also comprises a neighbor cell reporting module configured to transmit a neighbor cell measurement report to a serving base station, the neighbor cell measurement report including a measurement report for at least one neighbor cell; and the target secondary cell is selected from at least one neighboring cell.

According to a fifth aspect of the embodiments of the present invention, a device for indicating random access is provided. The device is applicable in a serving base station and includes a processor and a memory configured to store instructions executable by the processor. The processor is configured to perform the following operations: transmit random access indication signaling, wherein the random access indication signaling is configured to indicate to the terminal a target antenna array and/or a target beam for transmitting the random access preamble.

According to a sixth aspect of the embodiments of the present invention, there is provided a random access indication device comprising a processor and a memory configured to store instructions executable by the processor. The processor is configured to perform the following operations: receiving the random access indication signaling and determining a target antenna array and/or a target beam for transmitting the random access preamble based on the random access indication signaling.

According to a seventh aspect of the embodiments of the present invention, there is provided a computer-readable storage medium in which computer programs are stored. Computer programs are configured to implement the steps of the method presented within the first aspect of the disclosure of the present invention, when executed by their processor.

According to an eighth aspect of the embodiments of the present invention, there is provided a computer-readable storage medium in which computer programs are stored. Computer programs are configured to implement the steps of the method presented within the second aspect of the disclosure of the present invention, when executed by their processor.

By implementing a technical solution corresponding to the embodiments of the disclosure of the present invention, the following positive results can be achieved.

The serving base station transmits random access indication signaling to the terminal so that the terminal can determine the target antenna array and/or target beam for transmitting the random access preamble. Accordingly, if a terminal is equipped with a plurality of antenna panels, the terminal can accurately determine which of the antenna panels to use to initiate random access, resulting in improved random access accuracy and success rate, and reduced random access latency.

It should be appreciated that both the foregoing general description and the following detailed description are provided by way of illustration and explanation only, and should not be construed as limiting the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute one part of this specification, illustrate embodiments corresponding to the disclosure of the present invention and, together with the description, explain the principle of the disclosure of the present invention.

In FIG. 1 shows a network architecture diagram in accordance with an embodiment of the present invention.

In FIG. 2 is a flowchart illustrating a random access indication method according to an embodiment of the present invention.

In FIG. 3 is a flowchart illustrating a random access indication method according to another embodiment of the present invention.

In FIG. 4 is a flowchart illustrating a random access indication method according to another embodiment of the present invention.

In FIG. 5 is a flowchart illustrating a random access indication method according to another embodiment of the present invention.

In FIG. 6 is a block diagram of a random access indicator according to an embodiment of the present invention.

In FIG. 7 is a block diagram of a random access indicator according to another embodiment of the present invention.

In FIG. 8 is a block diagram of a random access indicator according to another embodiment of the present invention.

In FIG. 9 is a block diagram of a random access indicator according to another embodiment of the present invention.

In FIG. 10 is a block diagram illustrating the structure of a base station according to an embodiment of the present invention.

In FIG. 11 is a block diagram illustrating the structure of a terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION

The following describes in detail the embodiments and exemplary embodiments of the present invention, illustrated by means of the accompanying drawings. The following description is given with reference to the accompanying drawings, in which like numbers designate the same or like elements, unless expressly indicated otherwise. The exemplary embodiments set forth in the following description do not cover all embodiments that do not conflict with the present invention. On the contrary, this description provides only examples of the implementation of the device and method corresponding to some aspects of the disclosure of the present invention, the essence of which is set forth in the attached claims.

The purpose of describing the network architecture and business scenario in accordance with the disclosure of the present invention is to provide a clearer understanding of the technical solution offered by the disclosure options, which are not intended to limit the technical solution to these options. Those skilled in the art will appreciate that as network architecture evolves and new business scenarios are introduced, the technical solutions implemented by the embodiments of the present invention will be equally applicable to similar technical problems.

In FIG. 1 shows a network architecture diagram in accordance with an embodiment of the present invention. The network architecture may include a base station 110 and a terminal 120.

The base station 110 is located in the access network. The access network in a 5G NR system may be referred to as a new generation radio access network (NG-RAN, New Generation-Radio Access Network). Base station 110 may communicate with terminal 120 using some air interface technology, such as cellular technology.

Base station 110 is a device placed in an access network to perform a wireless communication function for terminal 120. Base station 110 may include various kinds of macro base stations, micro base stations, repeaters, access points, and so on. In a system using various wireless access technologies, devices that perform the function of a base station may be designated differently, for example, in a 5G NR system, such a device is called gNodeB or gNB. As communication technologies develop, the designation "base station" may change. For convenience of description, in the embodiments of the present invention, the above-mentioned device providing the wireless communication function for the terminal 120 is collectively referred to as a base station. The base station 110 may also be a vehicle-mounted device that is applicable to a vehicle-to-vehicle communication scenario in the Internet of Vehicles. In the communication process between vehicles, the channel or signaling in the disclosure of the present invention may be a channel or signaling applicable to a direct connection.

Typically, there may be multiple terminals 120 in a network, and one or more terminals 120 may be distributed in cells managed by each base station 110. Terminal 120 may include a variety of portable devices equipped with wireless communication, devices mounted on vehicles, , computing devices or other processing devices connected to a wireless modem, as well as various types of user equipment (UE, User Equipment), mobile stations (MS, Mobile Station), terminal devices, etc. For convenience of description, in the embodiments of the disclosure of the present invention, the above device is collectively referred to as a terminal. Terminal 120 may also be a vehicle-mounted device that is applicable to a vehicle-to-vehicle communication scenario in the Internet of Vehicles. In a vehicle-to-vehicle communication process, a channel or signaling in the disclosure of the present invention may be a channel or signaling suitable for a direct connection.

In embodiments of the disclosure of the present invention, "5G NR system" may also be referred to as 5G system or NR system, terms that are understood by those skilled in the art. The technical solutions described according to the embodiments of the disclosure of the present invention can be applied to the 5G NR system as well as to the system representing the subsequent development of the 5G NR system.

In FIG. 2 is a flowchart illustrating a random access indication method according to an embodiment of the present invention. The method can be applied to the network architecture shown in FIG. 1. The method may include steps 201-202, described below.

In step 201, the serving base station transmits random access indication signaling, wherein the random access indication signaling is configured to indicate to the terminal a target antenna panel and/or a target beam for transmitting the random access preamble.

The serving base station transmits the random access indication signaling to the terminal, and accordingly, the terminal receives the random access indication signaling transmitted by the serving base station. A serving base station refers to a base station that owns a serving cell accessible to a terminal.

If the terminal accesses only one serving cell, then the serving base station is the base station to which the serving cell belongs. If the terminal simultaneously accesses multiple serving cells, for example, the terminal accesses one primary cell (PCell, Primary Cell) and one or more secondary cells (SCell, Secondary Cell), then in this case, if PCell and SCell share one base station, then the serving base station is a shared base station, and if the PCell and SCell use different base stations, that is, there is a dual connection, namely: there is a peNB and a SeNB, then the serving base station can be the base station that owns the PCell , and may also be the base station to which the primary secondary cell (PSCell, Primary Secondary Cell) belongs.

According to embodiments of the disclosure of the present invention, the terminal is equipped with at least two antenna panels, and each antenna panel includes at least one beam. Based on the random access indication signaling, the serving base station indicates to the terminal a target antenna array and/or a target beam for transmitting the random access preamble. The target antenna panel may contain one antenna panel, and may also contain multiple antenna panels. The target beam may be a single beam, and may also contain multiple beams. If the target beam contains multiple beams, then multiple beams may belong to the same antenna panel, and may also belong to multiple different antenna panels. If the random access indication signaling includes a plurality of target antenna panels and a plurality of target beams at the same time, it is required to specify exactly the target antenna panel corresponding to each target beam.

Optionally, the random access indication signaling includes indication information of the target antenna panel and/or the target beam, and the indication information is configured to represent the target antenna panel and/or the target beam.

For example, the indication information contains a target array identifier and/or a target beam identifier. That is, the random access indication signaling comprises a target antenna array identifier and/or a target beam identifier. The target antenna panel ID is configured to uniquely indicate the target antenna panel, and different IDs are assigned to different antenna panels. An antenna panel identifier may be referred to as a panel ID, which may be a character string containing at least one number, letter, or symbol. The target beam ID is configured to uniquely indicate the target beam, and different beam IDs are assigned to different beams. The beam ID may be referred to as a beam ID, which may be a character string containing at least one number, letter, or symbol. For example, the random access indication signaling contains panel#1 and beam#5 identifiers indicating to the terminal that the target antenna panel for transmitting the random access preamble is antenna panel number 1 and the target beam for transmitting the random access preamble is beam number 5.

In another example, the indication information comprises a target array identifier and/or a second reference signal identifier. That is, the random access indication signaling comprises a target antenna array identifier and/or a second reference signal identifier. The second reference signal identifier is configured to indicate the target beam. The terminal may determine the target beam for transmitting the random access preamble based on the second reference signal identifier. The second reference signal identifier is the identifier of the second reference signal, which may be an uplink reference signal, such as a Sounding Reference Signal (SRS), as well as a downlink reference signal, such as a Synchronization Signal Block (SSB). ), or a Channel State Information-Reference Signal (CSI-RS). If the second reference signal is an uplink reference signal, the serving base station notifies the terminal to use a transmission beam for transmitting the uplink reference signal as a target beam for transmitting the random access preamble. If the second reference signal is a downlink reference signal, the serving base station notifies the terminal to use the transmit beam corresponding to the receive beam for receiving the downlink reference signal as the target beam for transmitting the random access preamble. For example, the random access indication signaling contains the identifiers panel#1 and SRS#1, which indicate to the terminal that the target antenna panel for transmitting the random access preamble is antenna panel number 1, and the target beam for transmitting the random access preamble is the transmit beam for SRS#1 transmission. For example, the random access indication signaling contains panel#1 and SSB#1 identifiers, which indicate to the terminal that the target antenna panel for transmitting the random access preamble is antenna panel number 1, and the target beam for transmitting the random access preamble is the transmit beam, corresponding to the receiving beam for receiving SSB#1.

In another example, the indication information comprises a second reference signal group (or set) identifier and/or a second reference signal identifier. That is, the random access indication signaling comprises a second reference signal group identifier and/or a second reference signal identifier. The second reference signal group identifier is configured to indicate the target antenna array, and the second reference signal identifier is configured to indicate the target beam. The terminal may determine the target antenna panel for transmitting the random access preamble based on the second reference signal group identifier. The second reference signal group identifier may identify the second reference signal group, and the second reference signal group may comprise at least one reference signal. The terminal may determine the target beam for transmitting the random access preamble based on the second reference signal identifier. The second reference signal identifier identifies the second reference signal. In this case, the reference signal may be an uplink reference signal or a downlink reference signal.

In another example, the indication information contains a second reference signal identifier. That is, the random access indication signaling comprises a second reference signal identifier. The second reference signal identifier is configured to indicate the target antenna array and/or the target beam. The terminal may determine the target antenna panel and/or the target beam for transmitting the random access preamble based on the second reference signal identifier. The second reference signal identifier identifies the second reference signal. In this case, if the reference signal ID for each antenna panel is different, the target antenna panel and/or the target beam for transmitting the random access preamble may be determined based on the second reference signal ID.

At 202, the terminal may determine a target antenna panel and/or a target beam for transmitting the random access preamble based on the random access indication signaling.

After receiving the random access indication signaling, the terminal may determine the target antenna panel and/or target beam for transmitting the random access preamble based on the random access indication signaling, and transmit the random access preamble using the target antenna panel and/or target beam, and thereby initiate random access to the network side.

Optionally, if the random access indication signaling indicates only the target antenna panel, the terminal transmits the random access preamble using the target antenna panel. In this case, if the target antenna array includes only one beam, the terminal transmits the random access preamble using this beam; if the target antenna panel includes a plurality of beams, the terminal for transmitting the random access preamble may select at least one beam from the plurality of beams.

Optionally, if the random access indication signaling only indicates the target beam, the terminal may determine the target antenna panel to which the target beam belongs, based on the correspondence between the antenna panel and the beam, in order to determine the target antenna panel and the target beam for transmitting the random access preamble.

Optionally, if the random access indication signaling indicates the target antenna panel and the target beam, the terminal may directly determine the target antenna panel and the target beam for transmitting the random access preamble based on the random access indication signaling.

For example, if the random access indication signaling contains panel ID #0, the terminal transmits the random access preamble using antenna panel number 0, and also transmits the random access preamble using at least one beam of antenna panel number 0. In another example, the indication signaling random access contains beam #1 identifier, assuming beam #1 belongs to panel #1, then the terminal transmits the random access preamble using beam number 1 of antenna panel number 1. In another example, the random access indication signaling contains panel #1 identifiers and beam #1, in which case the terminal transmits the random access preamble using beam number 1 of antenna panel number 1.

Optionally, the random access indication signaling also contains the target cell ID. The target beam refers to the cell to which the terminal intends to initiate random access. The target cell ID is configured to uniquely indicate the target cell, and different IDs are assigned to different cells. The cell ID may be referred to as a cell ID, which may be a character string containing at least one digit, letter, or symbol. The terminal may know which cell to initiate random access after receiving the target cell ID.

Optionally, the random access indication signaling comprises antenna panel and/or beam indication information configured to monitor a random access response (RAR) after the terminal transmits a random access preamble. The implementation form of the antenna panel and/or beam indication information configured for RAR monitoring may be the same as the implementation form of the target antenna panel and/or target beam indication information described above. For example, an antenna panel configured to monitor RAR may be indicated by an antenna panel identifier, and may also be indicated by a reference signal group identifier, and further may be indicated by a reference signal identifier; a beam configured for RAR monitoring may be indicated by a beam identifier, and may also be indicated by a reference signal identifier. In this case, the reference signal may also be an uplink reference signal or a downlink reference signal. Thus, the terminal can monitor the RAR feedback from the network side using the correct antenna panel and beam after transmission of the random access preamble, thereby improving random access performance.

In general, according to the technical solution presented by the embodiments of the present invention, the serving base station transmits random access indication signaling to the terminal so that the terminal can determine the target antenna array and/or the target beam for transmitting the random access preamble. Accordingly, if a terminal is equipped with a plurality of antenna panels, the terminal can accurately determine which of the antenna panels to use to initiate random access, resulting in improved random access accuracy and success rate, and reduced random access latency.

If the terminal is equipped with multiple antenna panels, there are the following scenarios in which the terminal initiates random access:

(1) all antenna panels of the terminal switch (handover) to the target cell, and one or more antenna panels are selected to transmit the random access preamble to the target cell;

(2) from all antenna panels of the terminal, one or more specific antenna panels are switched to the target cell, and one or more antenna panels are selected from one or more specific antenna panels to transmit the random access preamble to the target cell; in this case, the target cell is the cell in which the terminal is to be located after the handover;

(3) the terminal determines the occurrence of a radio link failure or beam failure of a certain serving cell antenna panel, and the random access preamble is transmitted to the target cell using the terminal's target antenna panel, with the target cell actually being the serving cell; wherein the target antenna panel is an antenna panel used when the terminal receives downlink information (downlink reference signal and/or downlink control signaling) transmitted by the antenna panel of the base station in which the radio link failure or beam failure has occurred;

(4) if the terminal is accessing a certain PCell and needs to add a SCell, one or more antenna panels are selected from the antenna panels of the terminal to transmit the random access preamble to the target cell. In this case, the target cell is the SCell to be added.

The corresponding random access indication methods for the various scenarios mentioned above are described below.

For scenario (1), the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell. Optionally, the handover instruction contains a target cell ID as well as target antenna array and/or target beam indication information. Accordingly, the terminal may determine that transmission of the random access preamble needs to be performed using the target antenna panel and/or the target beam when initiating random access to the target cell.

As shown in FIG. 3, according to scenario (1), the random access indication method provided according to the embodiments of the present invention may include steps 301-306.

In step 301, the terminal sends to the serving base station an RRM measurement report containing a measurement report for at least one neighbor cell.

If the terminal measures a neighbor cell and a serving cell, and determines that the measurement value for the neighbor cell satisfies a certain measurement report trigger event, such as event A3 (Event A3) that the measurement value for the neighbor cell is one offset greater than the measurement value of the serving cell, the terminal may transmit the RRM measurement report to the serving base station, and accordingly, the serving base station receives the RRM measurement report transmitted by the terminal. The RRM measurement report is configured to report the radio signal quality of the serving cell and/or the neighbor cell.

The RRM measurement report includes a measurement report for at least one neighbor cell. The neighbor cell measurement report is configured to indicate the radio signal quality of the neighbor cell. The neighbor cell measurement report may contain a neighbor cell ID, a measurement value for the neighbor cell, and information about the measurement object.

The neighbor cell measurement value is configured to indicate the radio signal quality of the neighbor cell. For example, the measurement value includes, but is not limited to, at least Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Signal to Interference Plus Noise Ratio (SINR , Signal to Interference Plus Noise Ratio). RSRP may include L1-RSRP and/or L3-RSRP, RSRQ includes L1-RSRQ and/or L3-RSRQ, and SINR includes L1-SINR and/or L3-SINR. L1 (Layer 1, layer 1) refers to the instantaneous sampled value at the physical layer, and L3 (Layer 3) refers to the average value in a sliding window at the RRM layer, such as a weighted average.

The measurement object information is configured to indicate the reception antenna panel and/or the reception beam used by the terminal to obtain the measurement value for the neighbor cell. If the terminal is performing neighbor cell signal measurements, any receive beam of any receive antenna panel may be used, but only if the receive antenna panel and/or receive beam specified in the measurement target information is used, the measurement value is the maximum or satisfies a certain condition (e.g., exceeds a pre-set threshold). Thus, the reception antenna panel and/or reception beam specified in the measurement object information when the terminal receives the measurement value for the neighbor cell specified in the measurement report is the reception antenna panel and/or reception beam through which the downlink reference signal is received. generated by the neighbor cell, and then the measurement value corresponding to the downlink reference signal is obtained.

For example, the information about the indication object contains the identifier of the receiving antenna panel and/or the identifier of the receiving beam. For example, the measurement object information contains identifiers panel#0 and beam#3, which indicate that the receive antenna panel used by the terminal to perform signal measurements in the neighbor cell is antenna panel number 0, and the receive beam used by the terminal for performing signal measurements in a neighboring cell, is beam number 3.

In another example, the indication object information contains the identifier of the receiving antenna panel and/or the first identifier of the reference signal. The first reference signal identifier is configured to indicate a reception beam. The serving base station may determine the receive beam used by the terminal to perform signal measurements based on the first reference signal identifier. The first reference signal identifier is the identifier of the first reference signal. The first reference may be a downlink reference such as SSB or CSI-RS, and may also be an uplink reference such as SRS. If the first reference signal is a downlink reference signal, the terminal notifies the base station that it measures the signal using a reception beam to receive the downlink reference signal; if the first reference signal is an uplink reference signal, the terminal notifies the base station that it measures the signal using the reception beam corresponding to the transmit beam for transmitting the uplink reference signal. For example, the measurement object information contains the identifiers panel#0 and SSB#1, which indicate that the receive antenna panel used by the terminal to perform signal measurements in the neighbor cell is antenna panel number 0, and the receive beam used by the terminal for performing signal measurements in the neighbor cell, is the beam for receiving SSB#1. In another example, the measurement object information contains panel IDs #0 and SRS#1, which indicate that the receive antenna panel used by the terminal to perform neighbor cell signal measurements is antenna panel number 0, and the receive beam used by the terminal to perform signal measurements in the neighbor cell, is the receive beam corresponding to the transmit beam for SSB#1 transmission.

In another example, the measurement object information contains a first reference signal group (or set) identifier and/or a first reference signal identifier. The first reference signal group identifier is configured to indicate a receiving antenna panel, and the first reference signal identifier is configured to indicate a reception beam. The serving base station may determine the receiving antenna panel used by the terminal to perform signal measurements based on the first reference signal group identifier. The first reference signal group identifier may be the first reference signal group identifier, and the first reference signal group may comprise at least one reference signal. The serving base station may determine the receive beam used by the terminal to perform signal measurements based on the first reference signal identifier. The first reference signal identifier is the identifier of the first reference signal. In this case, the reference signal may also be a downlink reference signal or an uplink reference signal.

In another example, the measurement object information contains the first identifier of the reference signal. The first reference signal identifier is configured to indicate a receiving antenna panel and/or a receiving beam. The serving base station may determine the receive antenna panel and/or the receive beam used by the terminal to perform signal measurements based on the first reference signal identifier. The first reference signal identifier is the identifier of the first reference signal. In this case, if the reference signal ID for each antenna panel is different, the receiving antenna panel and the receiving beam can be determined based on the first reference signal ID.

For example, suppose a measurement report of a certain neighbor cell contains cell ID#1, panel#0, beam#3, and RSRP. This indicates that the terminal is measuring the downlink reference signal generated by the neighbor cell using the receiving antenna panel panel#0 and receiving beam beam#3, and the obtained measurement value is the RSRP value, which can be represented by a specific numerical value reflecting the quality radio signal of a neighboring cell.

It should be noted that the RRM measurement report may contain reports of one or more neighboring cells, however, the measurement results of the neighboring cells must satisfy certain conditions, for example, the measurement value for the neighbor cell must be greater than the threshold value or comparable with the measurement value of the serving cell, the measurement value for a neighbor cell, there must be more than one offset. In other words, if the measurement result of a certain neighbor cell does not meet the above conditions, the RRM measurement report does not carry the measurement report for the neighbor cell, and if no neighbor cell meets the above conditions, the terminal does not transmit the RRM measurement report.

Optionally, the RRM measurement report also contains a serving cell measurement report that is configured to indicate the radio signal quality of the serving cell. The contents of the measurement report of the serving cell may be similar to the contents of the measurement report for the neighbor cell, so information about this report is not repeated.

In step 302, the serving base station selects a target cell from at least one neighboring cell.

Optionally, the serving base station selects the neighbor cell with the optimal radio signal strength as the target cell based on the measurement values of the respective neighbor cells.

In step 303, the serving base station transmits handover request signaling to the target base station to which the target cell belongs.

The handover request signaling is configured to request a handover to the target cell. Optionally, the handover request signaling comprises a measurement report for the target cell including, for example, a target cell ID, a measurement value of the target cell, and measurement object information.

After receiving the handover request signaling, the target base station transmits handover request response signaling to the serving base station when negotiating the terminal to move to the target cell.

In step 304, the serving base station receives a handover request response sent by the target base station.

Optionally, the handover request response signaling comprises target antenna array and/or target beam indication information. That is, the target base station determines the target antenna panel and/or the target beam used by the terminal to transmit the random access preamble when initiating random access to the base station, and notifies the serving base station by carrying information in the handover request response signaling. The serving base station then notifies the terminal.

The indication information of the target antenna panel and/or the target beam is configured to represent the target antenna panel and/or the target beam. As mentioned above with reference to FIG. 2, the indication information may be implemented in various ways. The indication information may comprise a target antenna array identifier and/or a target beam identifier, or comprise a target antenna array identifier and/or a second reference signal identifier, or comprise a second reference signal group identifier and/or a second reference signal identifier, or comprise a second reference signal identifier. . The specific form of the indication information included in the handover request response signaling depends on the form of the measurement object information in the measurement report transmitted by the terminal. Optionally, the form of the indication information included in the handover request response signaling is the same as the form of the measurement object information in the measurement report. For example, if the measurement object information in the measurement report contains a receiving antenna panel ID and/or a receiving beam ID, the indication information in the handover response signaling contains a target antenna panel ID and/or a target beam ID. In another example, if the measurement object information in the measurement report contains a receiving antenna panel ID and/or a first reference signal ID, the indication information in the handover response signaling contains a target antenna panel ID and/or a second reference signal ID.

In one possible case, if the terminal is equipped with beam matching means, that is, if the terminal receives the downlink signal transmitted by the base station, then the transmit antenna panel and/or the transmit beam corresponding to the receive antenna panel and/or the receive beam with the optimal signal , are the best choice when the terminal transmits the uplink signal. For example, let the terminal receive a downlink signal transmitted by the target base station, where the receiving antenna panel with the optimal wireless signal strength is panel #1, and the receiving beam is beam #1, and the transmitting antenna panel corresponding to the receiving antenna panel is panel #1, is panel#1, and the transmit beam corresponding to the receive beam of beam#1 is beam#4. In this case, if the terminal transmits the random access preamble to the target base station using panel #1 and beam #4, the received signal strength at the target base station should also be maximum. In this case, if the target base station, based on the measurement report, knows the optimal receiving antenna panel and the optimal receiving beam for the terminal with which it is communicating, then, accordingly, the target base station is also aware of the optimal transmitting antenna panel and the optimal transmitting beam for of the terminal with which to communicate, and this antenna panel and beam are considered as the target antenna panel and target beam used by the terminal to transmit the random access preamble to the target base station.

In another possible situation, if the terminal is not equipped with beam matching means, i.e., the terminal cannot directly find the corresponding transmit antenna panel and transmit beam based on the receive antenna panel and the receive beam, the serving base station may further include uplink reference signal configuration information, used by the terminal for uplink measurement into handover request signaling transmitted by the serving base station to the target base station. After obtaining the configuration information, the target base station measures the uplink reference signal transmitted by the terminal to obtain a measurement value corresponding to each uplink reference signal, and then determines the transmitting antenna panel and the transmitting beam with the optimal measurement value as the target antenna panel and the target beam, used when the terminal transmits the random access preamble to the target base station.

In step 305, the serving base station sends a handover instruction to the terminal.

Optionally, the handover instruction contains a target cell ID as well as target antenna array and/or target beam indication information. Optionally, the handover instruction also contains antenna panel and/or beam indication information configured to monitor RAR after the terminal transmits the random access preamble.

In step 306, the terminal determines a target antenna panel and/or a target beam for transmitting the random access preamble based on the handover instruction.

After receiving the handover instruction, the terminal may determine the target cell to which random access is initiated, determine the target antenna panel and/or target beam for transmitting the random access preamble, and transmit the random access preamble to the target base station to which the target cell belongs using the target antenna panel. and/or the target beam, causing random access to be initiated.

In addition, there may be one or more target antenna panels, as well as one or more beams.

The serving base station and the target base station may be the same or different, which is not limited to the present invention.

In scenario (1), the terminal transmits an RRM measurement report to the serving base station, and the serving base station determines the neighbor cell with the best signal strength as the target cell to which the terminal is transitioning, and the target base station to which the target cell belongs determines the target antenna panel and target beam used by the terminal to transmit the random access preamble, and thus the terminal can initiate random access to the target cell with the optimal signal strength, and the terminal can use the optimal transmitting antenna panel and the optimal transmit beam to initiate random access to the target cell , thereby fully ensuring a high rate of successful random access attempts in the process of handover to the cell.

In scenario (2) similar to scenario (1), the random access indication signaling is a handover instruction. Scenario (1) differs from scenario (2) in that only part of the specific antenna panels of the terminal switches to the target cell, for example, the terminal can reserve part of the antenna panels for communication with the current serving cell and switch another part of the antenna panels for communication with another target cell. In this case, the terminal also needs to transmit the candidate panel information to the serving base station configured with the candidate panel information to indicate the at least one antenna panel candidate for random access. The serving base station transmits candidate panel information to the target base station so that the target base station selects the target antenna panel from the at least one candidate antenna panel.

For example, the terminal is equipped with three antenna panels, panel#0, panel#1, and panel#2, respectively, and the terminal selects panel#0 and panel#2 to move to the target cell, while panel#1 information is not changed, in In this case, the candidate panel information transmitted by the terminal to the serving base station may contain the identifiers of two candidate antenna panels, for example, panel #0 and panel #2, then the target base station selects one or more antenna panels from the two possible panels as the target antenna panel used by the terminal to transmit the random access preamble to the target base station, for example, the target base station selects panel #0 as the target antenna panel used by the terminal to transmit the random access preamble.

In scenario (2), the terminal transmits candidate panel information to the network side so that the target base station selects a target antenna panel for transmitting the random access preamble from a plurality of candidate antenna panels to be handed over as determined by the terminal, as a result whereby the terminal initiates random access using the candidate antenna panel, thereby improving the accuracy and success rate of random access attempts.

In scenario (3), the random access indication signaling is a radio link recovery instruction or a beam recovery instruction. The radio link recovery instruction is configured to initiate the radio link recovery procedure by the terminal, and the beam recovery instruction is configured to initiate the beam recovery procedure by the terminal. Optionally, the radio link recovery instruction or the beam recovery instruction comprises target antenna panel and/or target beam indication information for the terminal to initiate random access to the target base station (such as a serving base station) using the target antenna panel and/or target beam. , in order to perform radio link recovery or beam recovery.

As shown in FIG. 4, according to scenario (3), the random access indication method presented according to the embodiments of the present invention may include steps 401-403.

In step 401, the terminal sends a radio link failure notification or a beam failure notification to the serving base station.

The radio link failure notification is configured to notify the serving base station of the base station antenna panel in which the radio link has failed, that is, to notify the serving base station which antenna panel(s) of the serving base station has the radio link failure. The beam failure notification is configured to notify the serving base station of the base station antenna panel in which the beam has failed, that is, to notify the serving base station which antenna panel(s) of the serving base station has a beam failure. Optionally, the radio link failure notification or the beam failure notification may contain indication information of the base station antenna panel in which the radio link failure or beam failure has occurred. Here, the base station antenna panel indication information may be a base station antenna panel ID, or may be represented by a reference signal group ID and/or a reference signal ID, and the reference signal can be a downlink reference signal or an uplink reference signal. For example, if the indication information is represented by a downlink reference signal identifier, the base station becomes aware of the beam failure in the TRP or antenna panel to transmit the downlink reference signal, in which case the base station needs to send downlink control signaling to the terminal in the new beam direction using antenna panel.

In step 402, the serving base station transmits a radio link recovery instruction or a beam recovery instruction to the terminal.

If the terminal sends a radio link failure notification to the serving base station, the serving base station sends a radio link recovery instruction to the terminal; if the terminal sends a beam failure notification to the serving base station, the serving base station sends a beam recovery instruction to the terminal.

Optionally, the radio link recovery instruction or the beam recovery instruction contains indication information of the target antenna array and/or the target beam. Optionally, the target antenna panel is the antenna panel used by the terminal to receive downlink information (e.g., downlink reference signal and/or downlink control signaling) transmitted by the antenna panel from the base station in which the radio link or beam failed. Similarly, the target antenna panel indication information here may be a target antenna panel ID, or may be represented by a reference signal group ID and/or a reference signal ID, and the reference signal can be a downlink reference signal or an uplink reference signal. For example, if the indication information is represented by the downlink reference signal identifier, the terminal will know that the base station needs the terminal to initiate random access to the TRP or base station antenna panel to transmit the downlink reference signal in the new beam direction in order for the base station to obtain the new direction. beam for transmission to the downlink control signaling terminal.

If the terminal does not transmit the random access preamble to the serving cell using the above target antenna panel, but, for example, transmits a Scheduling Request (SR) using a Physical Uplink Control Channel (PUCCH) or transmits control element signaling (CE, Control Element) access to the transmission medium (MAC, Medium Access Control) using a physical common uplink channel (PUSCH, Physical Uplink Shared Channel), or transmits a random access preamble using other serving cells or other antenna panels to notify the serving base radio link failure or beam failure of the base station antenna panel, after receiving the radio link failure notification or the beam failure notification of the serving base station, it is required to notify the terminal to perform random access on the target antenna panel used when receiving downlink information (eg, downlink reference signal and/or downlink control signaling) transmitted by the antenna panel of the base station in which the radio link or beam failed. The serving base station transmits to the terminal a radio link restoration instruction or a beam restoration instruction, which may contain indication information of the target antenna panel.

Optionally, the radio link recovery instruction or the beam recovery instruction may be Radio Resource Control (RRC) signaling, MAC CE signaling, or Downlink Control Information (DCI) signaling, but the disclosures herein are not limited to these types of signaling. inventions.

In step 403, the terminal determines a target antenna panel and/or a target beam for transmitting the random access preamble based on a radio link recovery instruction or a beam recovery instruction.

Upon receiving a radio link recovery instruction or a beam recovery instruction, the terminal may determine the target antenna panel and/or the target beam for transmitting the random access preamble based on these instructions, and then transmit the random access preamble to the serving base station using the target antenna panel and/or the target antenna. beam and thus initiate random access.

In scenario (3), random access is performed in a radio link failure or beam failure scenario, and the wireless link or beam is restored.

In scenario (4), the random access indication signaling is a secondary cell addition instruction configured to direct the terminal to access the target secondary cell. Optionally, the secondary cell addition instruction comprises target antenna panel and/or target beam indication information for the terminal to initiate random access to the target base station (such as the base station to which the target secondary cell belongs) using the target antenna panel and/or target beam to access the target secondary cell.

As shown in FIG. 5, according to scenario (4), the random access indication method provided according to the embodiments of the present invention may include steps 501-503 described below.

In step 501, the terminal sends a neighbor cell measurement report to the serving base station.

Optionally, the neighbor cell measurement report includes a measurement report for at least one neighbor cell. The neighbor cell measurement report is configured to indicate the radio signal quality of the neighbor cell. The neighbor cell measurement report may contain a neighbor cell ID, a measurement value for the neighbor cell, and information about the measurement object. As for the neighbor cell measurement report, the above description may be referred to, which is not duplicated hereinafter.

At step 502, the serving base station selects a target secondary cell from at least one neighbor cell.

Optionally, the serving base station, as the target secondary cell, selects a neighbor cell with an optimal radio signal strength based on the measurement values of the respective neighbor cells.

In step 503, the serving base station sends an instruction to add a secondary cell to the terminal.

The secondary cell addition instruction is configured to direct the terminal to access the target secondary cell. Optionally, the adding secondary cell instruction contains the ID of the target secondary cell. Optionally, the secondary cell addition instruction also contains target antenna array and/or target beam indication information. For the format of the indication information of the target antenna array and/or the target beam, please refer to the above description, which is not repeated hereinafter.

In step 504, the terminal determines a target antenna panel and/or a target beam for transmitting the random access preamble based on the secondary cell addition instruction.

After receiving the secondary cell addition instruction, the terminal may determine the target secondary cell to which random access is initiated, determine the target antenna panel and/or target beam for transmitting the random access preamble, and transmit the random access preamble to the base station to which the target secondary cell belongs, using target antenna array and/or target beam, thereby initiating random access.

In scenario (4), antenna panel selection is made when the terminal accesses the secondary cell, so that the terminal initiates random access to the secondary cell using the candidate antenna panel, thereby increasing the secondary cell access success rate.

It should be noted that according to the above embodiments of the method, the disclosed technical solution is described from the point of view of the interaction between the terminal and the serving base station. The steps performed by the terminal may be independently implemented as a terminal-side random access indication method, and the steps performed by a serving base station may be independently implemented as a base station-side random access indication method.

Embodiments of the device may be configured to perform variations of the methods carried out in accordance with the disclosure of the present invention. For more detailed information not disclosed in the description of embodiments of the device, you can refer to the options for implementing the method.

In FIG. 6 is a block diagram of a random access indicator according to an embodiment of the present invention. The device performs the functions of the above exemplary implementation of the method on the side of the serving base station, and these functions can be implemented using hardware or corresponding software executed by the hardware. The apparatus may be the serving base station described above, or may be installed in the serving base station. As shown in FIG. 6, the device 600 may include an indication signaling transmission module 601 .

The indication signaling transmission module 601 is configured to transmit random access indication signaling, wherein the random access indication signaling is configured to indicate to the terminal a target antenna panel and/or a target beam for transmitting the random access preamble.

According to an embodiment, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

According to an embodiment, as shown in FIG. 7, the apparatus 600 also includes a measurement report receiving unit 602, a target cell selection unit 603, a handover request transmitting unit 604, and a handover request response receiving unit 605.

The measurement report receiving unit 602 is configured to receive an RRM measurement report transmitted by the terminal, wherein the RRM measurement report includes a measurement report for at least one neighbor cell.

The target cell selection module 603 is configured to select a target cell from at least one neighboring cell.

The handover request transmitting unit 604 is configured to transmit handover request signaling to the target base station to which the target cell belongs, wherein the handover request signaling includes a measurement report for the target cell.

The handover request response receiving unit 605 is configured to receive the handover request response signaling transmitted by the target base station, wherein the handover request response signaling includes target antenna panel and/or target beam indication information.

According to an exemplary embodiment, the neighbor cell measurement report contains the neighbor cell ID, the measurement value for the neighbor cell, and information about the measurement object. The measurement object information is configured to indicate the reception antenna panel and/or the reception beam used by the terminal to obtain the measurement value for the neighbor cell.

In accordance with an exemplary implementation, information about the object of measurement contains the identifier of the receiving antenna panel and/or the identifier of the receiving beam; or a receive antenna panel identifier and/or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive beam; or a first reference signal group identifier and/or a first reference signal identifier, wherein the first reference signal group identifier is configured to indicate a receiving antenna panel and the first reference signal identifier is configured to indicate a reception beam; or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive antenna panel and/or a receive beam.

According to an exemplary embodiment, the handover request signaling also contains configuration information of the uplink reference signal used by the terminal for uplink measurements.

According to an embodiment, as shown in FIG. 7, the device 600 also includes a panel information receiving unit 606 and a panel information transmitting unit 607.

The panel information receiving unit 606 is configured to receive candidate panel information transmitted by the terminal, wherein the candidate panel information is configured to indicate at least one panel candidate antenna for random access.

The panel information transmitting module 607 is configured to transmit candidate panel information to the target base station. The target antenna panel is selected from at least one candidate antenna panel.

According to an embodiment, the random access indication signaling is a radio link recovery instruction or a beam recovery instruction.

In accordance with the exemplary embodiment, as shown in FIG. 7, the device 600 also includes a failure notification receiving module 608 .

The failure notification receiving unit 608 is configured to receive a radio link failure notification or a beam failure notification transmitted by the terminal, wherein the radio link failure notification is configured to notify the serving base station of the base station antenna panel in which the radio link failure has occurred, and the beam failure notification is configured to notify the serving base station of the base station's antenna panel in which a beam failure has occurred.

According to the exemplary embodiment, the random access indication signaling is a secondary cell add instruction, and the secondary cell add instruction is configured to direct the terminal to access the target secondary cell.

According to an embodiment, as shown in FIG. 7, the device 600 also includes a neighbor cell report receiving module 609 and a secondary cell selection module 610.

The neighbor cell report receiving unit 609 is configured to receive a neighbor cell measurement report transmitted by the terminal, wherein the neighbor cell measurement report includes a measurement report for at least one neighbor cell.

The secondary cell selection module 610 is configured to select a target secondary cell from at least one neighboring cell.

According to an exemplary embodiment, the random access indication signaling comprises a target antenna panel identifier and/or a target beam identifier; or a target antenna panel identifier and/or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate a target beam; or a second reference signal group identifier and/or a second reference signal identifier, wherein the second reference signal group identifier is configured to indicate a target antenna panel and the second reference signal identifier is configured to indicate a target beam; or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate the target antenna array and/or the target beam.

According to an embodiment, the random access indication signaling also comprises antenna panel and/or beam indication information configured to monitor RAR after the terminal transmits the random access preamble.

In general, according to the technical solution presented by the embodiments of the present invention, the serving base station transmits random access indication signaling to the terminal so that the terminal can determine the target antenna array and/or the target beam for transmitting the random access preamble. Accordingly, if a terminal is equipped with a plurality of antenna panels, the terminal can accurately determine which of the antenna panels to use to initiate random access, resulting in improved random access accuracy and success rate, and reduced random access latency.

In FIG. 8 is a block diagram of a random access indicator according to another embodiment of the present invention. The device may perform the functions of implementing the above exemplary method on the terminal side, and these functions may be implemented using hardware or appropriate software executed by the hardware. The device may be a terminal as described above, or may be installed in a terminal. As shown in FIG. 8, the device 800 may include an indication signaling receiving module 801 and a panel beam detecting module 802.

The indication signaling receiving unit 801 is configured to receive the random access indication signaling.

The panel beam determiner 802 is configured to determine a target antenna panel and/or a target beam for random access preamble transmission based on random access indication signaling.

According to an embodiment, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

According to an embodiment, as shown in FIG. 9, the device 800 also includes a measurement report transmission module 803.

The measurement report transmission unit 803 is configured to transmit a radio resource management (RRM) measurement report to the serving base station, wherein the RRM measurement report includes a measurement report for at least one neighbor cell.

The neighbor cell measurement report contains the neighbor cell ID, the measurement value for the neighbor cell, and information about the measurement object. The measurement object information is configured to indicate the reception antenna panel and/or the reception beam used by the terminal to obtain the measurement value for the neighbor cell.

According to an embodiment, as shown in FIG. 9, the device 800 also includes a panel information communication module 804.

The panel information transmitting module 804 is configured to transmit candidate panel information to the serving base station. The candidate panel information indicates at least one candidate antenna panel for random access. The target antenna panel is selected from at least one candidate antenna panel.

According to an embodiment, the random access indication signaling is a radio link recovery instruction or a beam recovery instruction.

According to an embodiment, as shown in FIG. 9, the device 800 also includes a failure notification transmission module 805.

The failure notification transmission unit 805 is configured to transmit a radio link failure notification or a beam failure notification to a serving base station, wherein the radio link failure notification is configured to notify the serving base station of the base station's antenna panel in which the radio link has failed, and the beam failure notification is configured to notify the serving base station of the base station antenna panel in which the beam failure has occurred.

According to the exemplary embodiment, the random access indication signaling is a secondary cell add instruction, and the secondary cell add instruction is configured to direct the terminal to access the target secondary cell.

According to an embodiment, as shown in FIG. 9, device 800 also includes a neighbor cell reporting module 806.

The neighbor cell reporting module 806 is configured to transmit a neighbor cell measurement report to the serving base station, wherein the neighbor cell measurement report includes a measurement report for at least one neighbor cell. The target secondary cell is selected from at least one neighboring cell.

In general, according to the technical solution presented by the embodiments of the present invention, the serving base station transmits random access indication signaling to the terminal so that the terminal can determine the target antenna array and/or the target beam for transmitting the random access preamble. Accordingly, if a terminal is equipped with a plurality of antenna panels, the terminal can accurately determine which of the antenna panels to use to initiate random access, resulting in improved random access accuracy and success rate, and reduced random access latency.

It should be noted that when the apparatus proposed in the framework of the above embodiments performs the functions described above, the division into respective functional modules is only illustrative. In practical applications, the functions described above can be assigned to different functional modules depending on the actual requirements, that is, the internal structure of the device is divided into different functional modules to perform all or part of the functions described above.

With regard to the apparatus according to the embodiments of the present invention, the specific method of performing operations in each module has been described in detail within the scope of the respective method embodiments, and will not be discussed further in detail.

According to an exemplary disclosure of the present invention, a device for indicating random access is also provided. The disclosed device can be used in the above-described serving base station to implement the random access indication method on the side of the serving base station. The device may include a processor and a memory configured to store instructions executable by the processor. The processor is configured to perform the following operations: transmit random access indication signaling, wherein the random access indication signaling indicates to the terminal a target antenna array and/or a target beam for transmitting the random access preamble.

According to an embodiment, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

According to the exemplary embodiment, the processor is also configured to perform the following operations: receiving an RRM measurement report transmitted by the terminal, wherein the RRM measurement report includes a measurement report for at least one neighbor cell; selecting a target cell from at least one neighboring cell; transmitting handover request signaling to a target base station to which the target cell belongs, the handover request signaling including a measurement report for the target cell; and receiving handover request response signaling transmitted by the target base station, wherein the handover request response signaling includes target antenna panel and/or target beam indication information.

According to an exemplary embodiment, the neighbor cell measurement report contains the neighbor cell ID, the measurement value for the neighbor cell, and information about the measurement object. The measurement object information is configured to indicate the reception antenna panel and/or the reception beam used by the terminal to obtain the measurement value for the neighbor cell.

In accordance with an exemplary embodiment, information about the object of measurement contains the identifier of the receiving antenna panel and/or the identifier of the receiving beam; or a receive antenna panel identifier and/or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive beam; or a first reference signal group identifier and/or a first reference signal identifier, wherein the first reference signal group identifier is configured to indicate a receiving antenna panel and the first reference signal identifier is configured to indicate a reception beam; or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive antenna panel and/or a receive beam.

According to an exemplary embodiment, the handover request signaling also contains configuration information of the uplink reference signal used by the terminal for uplink measurements.

According to the exemplary embodiment, the processor is also configured to perform the following operations: receiving candidate panel information transmitted by the terminal, wherein the candidate panel information indicates at least one random access antenna panel candidate; and transmitting information about the candidate panel to the target base station. The target antenna panel is selected from at least one candidate antenna panel.

According to an embodiment, the random access indication signaling is a radio link recovery instruction or a beam recovery instruction.

According to the exemplary embodiment, the processor is also configured to perform the following operations: receiving a radio link failure notification or a beam failure notification transmitted by a terminal, wherein the radio link failure notification is configured to notify the serving base station of the base station antenna panel in which the the radio link failure and the beam failure notification is configured to notify the serving base station of the base station's antenna panel in which the beam failure has occurred.

According to the exemplary embodiment, the random access indication signaling is a secondary cell add instruction, and the secondary cell add instruction is configured to direct the terminal to access the target secondary cell.

According to the exemplary embodiment, the processor is also configured to perform the following operations: receiving a neighbor cell measurement report transmitted by the terminal, wherein the neighbor cell measurement report includes a measurement report for at least one neighbor cell; and selecting a target secondary cell from at least one neighboring cell.

According to an exemplary embodiment, the random access indication signaling comprises a target antenna panel identifier and/or a target beam identifier; or a target antenna panel identifier and/or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate a target beam; or a second reference signal group identifier and/or a second reference signal identifier, wherein the second reference signal group identifier is configured to indicate a target antenna panel and the second reference signal identifier is configured to indicate a target beam; or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate the target antenna array and/or the target beam.

According to an embodiment, the random access indication signaling also includes antenna panel and/or beam indication information configured to monitor RAR after the terminal transmits the random access preamble.

According to an exemplary disclosure of the present invention, a device for indicating random access is also provided. The disclosed device can be used in the terminal described above to implement a method for indicating random access on the terminal side. The device may include a processor and a memory configured to store instructions executable by the processor. The processor is configured to perform the following operations: receiving the random access indication signaling and determining a target antenna array and/or a target beam for transmitting the random access preamble based on the random access indication signaling.

According to an embodiment, the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell.

According to an embodiment, the processor is also configured to perform the following operations: transmitting an RRM measurement report to a serving base station, wherein the RRM measurement report includes a measurement report for at least one neighbor cell; the neighbor cell measurement report contains the neighbor cell identifier, the measurement value for the neighbor cell, and the measurement object information, the measurement object information being configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighbor cell.

In accordance with the exemplary embodiment, the processor is also configured to perform the following operations: transmitting the candidate panel information to the serving base station, wherein the candidate panel information is configured to indicate at least one candidate panel antenna for random access. The target antenna panel is selected from at least one candidate antenna panel.

According to an embodiment, the random access indication signaling is a radio link recovery instruction or a beam recovery instruction.

According to the exemplary embodiment, the processor is also configured to perform the following operations: transmitting a radio link failure notification or a beam failure notification to a serving base station, wherein the radio link failure notification is configured to notify the serving base station of a base station antenna panel in which a radio link failure has occurred, and the beam failure notification is configured to notify the serving base station of the base station's antenna panel in which the beam failure has occurred.

According to the exemplary embodiment, the random access indication signaling is a secondary cell add instruction, and the secondary cell add instruction is configured to direct the terminal to access the target secondary cell.

In accordance with an embodiment, the processor is also configured to perform the following operations: transmitting a measurement report for a neighbor cell to a serving base station, wherein the measurement report for a neighbor cell includes a measurement report for at least one neighbor cell; and the target secondary cell is selected from at least one neighboring cell.

The solution according to the embodiments of the present invention is offered primarily from the point of view of the base station and the terminal. It should be appreciated that the base station and the terminal contain hardware structures and/or software modules to perform each function in order to achieve the desired results. The blocks and steps of the algorithms in the examples described in connection with the embodiments disclosed in this specification may be implemented using hardware or a combination of hardware and computer software. The way certain functions are performed, hardware or software, depends on specific applications and design constraints of the technical solution. Specialists in this field of technology can use various methods to implement the described functions in each particular application, however, such implementations should not be considered as beyond the technical solution given in the embodiments of the disclosure of the present invention.

In FIG. 10 is a block diagram illustrating the structure of a base station according to an embodiment of the present invention.

Base station 1000 includes a transceiver 1001 and a processor 1002. Processor 1002 may also be a controller and is indicated in FIG. 10 as "controller/processor 1002". The transceiver 1001 is configured to support transmission and reception of information between the base station and the terminal according to the above-described embodiments, as well as to support communication between the base station and other network entities. The processor 1002 performs various functions for communicating with the terminal. In the uplink, the signal from the terminal is received by the antenna, demodulated by the receiver 1001 (eg, the high frequency signal is demodulated to a baseband signal), and further processed by the processor 1002 to recover the service data and signaling information transmitted by the terminal. In the downlink, the service data and signaling messages are processed by the processor 1002 and modulated by the transmitter 1001 (eg, the baseband signal is modulated into a high frequency signal) to generate a downlink signal and transmit it to the terminal via an antenna. It should be noted that the above demodulation or modulation functions may also be performed by the processor 1002. For example, the processor 1002 is also configured to perform various operations on the base station side in the embodiments described above and/or other operations of the technical solutions described in the embodiments of the disclosure of the present invention.

In addition, the base station 1000 may also include a memory 1003 configured to store program codes and data of the base station 1000. In addition, the base station may also include a communication unit 1004. The communication unit 1004 is configured to support communication between the base station and other network devices (eg, a network device in a core network, etc.). For example, in a 5G NR system, communication unit 1004 may be an NG-U interface configured to support communication between a base station and a User Plane Function (UPF); or, the communication unit 1004 may be an NG-C interface configured to support communication with the access and mobility control functional entity.

It should be understood that in FIG. 10 shows only a simplified design of base station 1000. In practical applications, base station 1000 may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations, which may be embodiments of the disclosure of the present invention. , are within the scope of the embodiments of the disclosure of the present invention.

In FIG. 11 is a block diagram illustrating the structure of a terminal according to an embodiment of the present invention.

Terminal 1100 includes transmitter 1101, receiver 1102, and processor 1103. Processor 1103 may also be a controller, and in FIG. 11, it is designated "controller/processor 1103". Optionally, terminal 1100 may also include a modem processor 1105, which may include an encoder 1106, a modulator 1107, a decoder 1108, and a demodulator 1109.

In one example, transmitter 1101 tunes (eg, performs analog conversion, filtering, amplification, upconversion, etc.) output sequences and generates an uplink signal that is transmitted through an antenna to a base station. In the downlink, the antenna receives the downlink signal transmitted by the base station. The receiver 1102 performs tuning (eg, filtering, amplifying, downconverting, digitizing, etc.) of the signals received from the antenna and generating input sequences. At modem processor 1105, encoder 1106 receives service data and signaling messages to be transmitted on the uplink and processes them (eg, formats, encodes, and interleaves). Modulator 1107 further processes (eg, symbol mapping and modulation) the encoded service data and signaling messages, and generates an output sequence. A demodulator 1109 processes (eg, demodulates) the input sequence and performs symbol estimation. Decoder 1108 processes (eg, deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages transmitted to terminal 1100. Encoder 1106, modulator 1107, demodulator 1109, and decoder 1108 may be implemented by modem combination processor 1105. These blocks are processed in accordance with the radio access technologies (eg, 5G NR and other advanced system access technologies) used by the radio access network. It should be noted that if the terminal 1100 does not include a modem processor 1105, the functions of the modem processor 1105 may also be performed by the processor 1103.

The processor 1103 monitors and controls the operations of the terminal 1100 and is configured to execute the processing executed by the terminal 1100 in accordance with the embodiments of the present invention described above. For example, the processor 1103 is also configured to perform various terminal-side operations described in the method embodiments above and/or other operations of the technical solutions described in the embodiments of the disclosure of the present invention.

In addition, terminal 1100 may also include a memory 1104 configured to store program codes and data of terminal 1100.

It should be understood that in FIG. 11 is only an illustration of a simplified design of terminal 1100. In practical applications, terminal 1100 may include any number of transmitters, receivers, processors, modem processors, memories, etc., and all terminals that may be embodiments of the present invention are within scope of the embodiments of the present invention.

Also within the scope of the disclosures of the present invention is a computer-readable storage medium on which computer programs are recorded. The computer programs are executed by the processor of the serving base station to implement the random access indication method on the side of the serving base station.

Also within the scope of the disclosures of the present invention is a computer-readable storage medium on which computer programs are recorded. Computer programs are executed by the processor of the terminal to implement the random access indication method on the terminal side.

Optionally, the computer-readable storage medium may be Read-Only Memory (ROM), Random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical storage device, etc.

It will be appreciated that the term "more" as used in the disclosure of the present invention means two or more. The conjunction "and/or" describes the relationship of the respective objects and indicates that three relationships can exist, for example, the expression "A and/or B" indicates the existence of only A, the simultaneous existence of A and B, and the existence of only B. The symbol " /" usually indicates that there is an "or" relationship between the corresponding objects.

After reading this description and putting it into practice, specialists in this field of technology should be obvious to other embodiments of the present invention. This application is intended to cover any variation, use, or adaptive variation of the present invention. These variations, uses, or adaptive changes are in accordance with the general principles of the disclosure of the present invention and include knowledge or techniques known or customary in the art or techniques not disclosed herein. The description and embodiments are to be considered as examples only, and the spirit and scope of the present invention are set forth in the appended claims.

It should be appreciated that the disclosure of the present invention is not limited exactly to the structure described above and illustrated in the drawings, and various modifications and changes may be made within the scope of the present invention. The scope of the invention is limited only by the appended claims.

Claims (48)

1. A method for indicating random access, including: receiving, by the serving base station, a Radio Resource Management (RRM) measurement report transmitted by the terminal, the RRM measurement report including a measurement report for at least one neighbor cell; the serving base station transmitting random access indication signaling, wherein the random access indication signaling is configured to indicate to the terminal a target antenna panel and/or a target beam for transmitting the random access preamble, wherein the measurement report for the neighbor cell contains information about the measurement object, which is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighboring cell. 2. The method of claim 1, wherein the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell. 3. The method according to p. 2, including also: selecting, by the serving base station, a target cell from at least one neighboring cell; transmitting, by the serving base station, handover request signaling to a target base station to which the target cell belongs, the handover request signaling comprising a measurement report for the target cell; and receiving, by the serving base station, the handover request response signaling transmitted by the target base station, wherein the handover request response signaling comprises target antenna panel and/or target beam indication information. 4. The method of claim 3, wherein the neighbor cell measurement report contains a neighbor cell identifier and a measurement value for the neighbor cell. 5. The method according to p. 4, characterized in that the information about the measurement object contains: receiving antenna panel identifier and/or receiving beam identifier, or a receive antenna panel identifier and/or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive beam; or a first reference signal group identifier and/or a first reference signal identifier, wherein the first reference signal group identifier is configured to indicate a receiving antenna panel and the first reference signal identifier is configured to indicate a reception beam; or a first reference signal identifier, wherein the first reference signal identifier is configured to indicate a receive antenna panel and/or a receive beam. 6. The method of claim 1, wherein the random access indication signaling is a secondary cell add instruction, and the secondary cell add instruction is configured to direct the terminal to access the target secondary cell. 7. The method according to any one of paragraphs. 1-6, characterized in that the random access indication signaling comprises: target array identifier and/or target beam identifier, or a target antenna panel identifier and/or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate the target beam; or a second reference signal group identifier and/or a second reference signal identifier, wherein the second reference signal group identifier is configured to indicate a target antenna array and the second reference signal identifier is configured to indicate a target beam; or a second reference signal identifier, wherein the second reference signal identifier is configured to indicate a target antenna array and/or a target beam. 8. The method according to any one of paragraphs. 1-7, characterized in that the random access indication signaling comprises antenna panel and/or beam indication information configured to monitor the random access response (RAR) after the terminal transmits the random access preamble. 9. Method for indicating random access, including: transmitting, by the terminal, a radio resource management (RRM) measurement report to the serving base station, the RRM measurement report including a measurement report for at least one neighbor cell; the signaling terminal receiving the random access indication, and determining, by the terminal, the target antenna panel and/or the target beam for transmitting the random access preamble based on the random access indication signaling, wherein the measurement report for the neighbor cell contains information about the measurement object, which is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighboring cell. 10. The method of claim 9, wherein the random access indication signaling is a handover instruction configured to direct the terminal to handover to the target cell. 11. The method of claim 10, wherein the neighbor cell measurement report contains a neighbor cell identifier and a measurement value for the neighbor cell. 12. The method according to p. 11, including also: transmitting, by the terminal, candidate panel information to the serving base station, wherein the candidate panel information indicates at least one candidate random access antenna panel; wherein the target antenna panel is selected from at least one candidate antenna panel. 13. The method of claim 9, wherein the random access indication signaling is a secondary cell add instruction, and the secondary cell add instruction is configured to direct the terminal to access the target secondary cell. 14. A device for indicating random access, used in a serving base station and containing: processor and memory, which stores instructions executed by the processor; while the processor is configured for: receiving a radio resource management (RRM) measurement report transmitted by the terminal, the RRM measurement report including a measurement report for at least one neighbor cell; transmitting random access indication signaling, wherein the random access indication signaling is configured to indicate to the terminal a target antenna panel and/or a target beam for transmitting the random access preamble, wherein the measurement report for the neighbor cell contains information about the measurement object, which is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighboring cell. 15. A device for indicating random access, used in the terminal and containing: processor and memory, which stores instructions executed by the processor; while the processor is configured for: transmitting a radio resource management (RRM) measurement report to the serving base station, the RRM measurement report comprising a measurement report for at least one neighbor cell; receiving random access indication signaling and determining a target antenna panel and/or a target beam for transmitting a random access preamble based on random access indication signaling, wherein the measurement report for the neighbor cell contains information about the measurement object, which is configured to indicate the receiving antenna panel and/or the receiving beam used by the terminal to obtain the measurement value for the neighboring cell.

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