Random access methods, devices, terminals, and network-side equipment

Abstract

The present disclosure provides a random access method, apparatus, terminal, and network-side device. The method includes receiving first information transmitted from a first cell and used to instruct a terminal to perform random access, where the first information includes second information for instructing a second cell, the first cell is one of the serving cells of the terminal, and the second cell is a cell different from the index of the first cell; and transmitting a random access message to the second cell according to the first information.

Description

Technical Field

[0001] Cross-reference to Related Applications This application claims the priority of Chinese Patent Application No. 202210836008.6 filed in China on July 15, 2022, and all of its content is incorporated herein by reference. This disclosure relates to the field of wireless technology, and in particular, to a random access method, apparatus, terminal, and network-side device.

Background Art

[0002] Currently, based on inter-cell beam management, it is supported to configure the synchronization signal and physical broadcast channel (PBCH) block (SSB) of a non-serving cell as a beam measurement reference signal. A terminal can report the measurement result of the layer 1 reference signal receiving power (L1-RSRP) of the SSB of the non-serving cell, and a serving cell can select a beam serving terminal of the non-serving cell.

[0003] By enhancing mobility based on layer 1 / layer 2 (L1 / L2) control signaling, the use of L1 / L2 control signaling enables the completion of handover for delay reduction. Considering that a source base station (serving cell) can configure in advance for a terminal multiple candidate cells or target cells, and radio resource control (RRC), etc. of these cells, one of the RRC configurations is activated / deactivated according to the L1 measurement result to complete the handover.

[0004] In asynchronous scenarios, it is necessary to acquire the timing advance (TA) information of the target cell. In conventional handover processes, the terminal must initiate random access to the target cell in a Layer 3 procedure to acquire information such as TA and complete synchronization with the target cell. This method results in high latency during the synchronization process with the target cell (non-serving cell), failing to meet the need for latency reduction. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] The purpose of the technical aspects of this disclosure is to provide a random access method, apparatus, terminal, and network-side equipment to solve the problem of high latency in the synchronization process between a terminal and a target cell (non-serving cell) in related technologies. [Means for solving the problem]

[0006] This disclosure relates to a random access method performed by a terminal, wherein the method is Receiving first information transmitted from a first cell to instruct the terminal to perform random access, wherein the first information includes second information to instruct a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell different from the index of the first cell; A random access method is provided, which includes sending a random access message to the second cell in accordance with the first information.

[0007] Selectively, in such random access methods, the method is The system further includes receiving a random access response message transmitted from the second cell, which includes time advance (TA) information of the second cell.

[0008] Selectively, in such random access method, the second information includes: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0009] Selectively, in such random access methods, the method is The process further includes determining resource information for transmitting the random access message according to the second information and configuration information of at least one third cell, The second cell is one of the at least one third cell.

[0010] Selectively, in such random access method, the configuration information includes: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0011] Selectively, in such random access methods, the resource information includes the preamble index of the random access pilot and / or the time-frequency domain resource from which the pilot transmits.

[0012] Optionally, in such a random access method, the first information further includes a reference signal index. Transmitting a random access message to the second cell includes transmitting the random access message to the second cell using the same spatial parameters as the reference signal indicated by the reference signal index.

[0013] Optionally, in such a random access method, the method further includes calculating the transmission power of the random access message according to the reference signal and / or power information corresponding to the second cell.

[0014] Optionally, in such a random access method, the method further includes determining the reference signal corresponding to the second cell according to the reference signal index in the second information.

[0015] An embodiment of the present disclosure is a random access method executed by a first cell, the method includes transmitting, to a terminal, first information for instructing the terminal to perform random access, the first information includes second information for instructing a second cell, the first cell is one of the serving cells of the terminal, and the second cell is a cell different from the index of the first cell, and further provides a random access method.

[0016] Optionally, in such a random access method, the second information includes an index of the second cell, an index of the configuration information of the second cell, an index of the reference signal of the second cell, an index of the random access resource of the second cell, and / or an index of the random preamble of the second cell, including one or more of them.

[0017] Optionally, in such a random access method, the method further comprises: transmitting, to the terminal, radio resource control (RRC) information including configuration information of at least one third cell, wherein the second cell is one of the at least one third cell; The configuration information includes: random access channel (RACH) resources; random access channel transmission opportunities (RACH occasions); the relationship between the RACH resources and synchronization signal blocks (SSBs); the relationship between the RACH occasions and SSBs; the relationship between the RACH resources and channel state information reference signals (CSI-RSs); the relationship between the RACH occasions and CSI-RSs; an index of the configuration information; and one or more pieces of information including maximum transmission power (Pcmax).

[0018] An embodiment of the present disclosure provides a terminal including a transceiver, where the transceiver receives first information transmitted from a first cell and used to instruct the terminal to perform random access, the first information includes second information for instructing a second cell, the first cell is one of the serving cells of the terminal, and the second cell is a cell different from the index of the first cell; and further transmits a random access message to the second cell according to the first information.

[0019] An embodiment of the present disclosure provides a network-side device applied to a first cell and including a transceiver, where the transceiver Further providing a network-side device for transmitting first information to a terminal, which is first information for instructing the terminal to perform random access, wherein the first information includes second information for instructing a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell with a different index from the first cell.

[0020] Embodiments of this disclosure are random access devices applied to terminals, wherein the device, A receiving module for receiving first information transmitted from a first cell to instruct the terminal to perform random access, wherein the first information includes second information to instruct a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell different from the index of the first cell. Further providing is a random access device, which includes a first transmission module for transmitting a random access message to the second cell in accordance with the first information.

[0021] Embodiments of the present disclosure are random access devices performed by a first cell, wherein the device, The present invention further provides a random access device, which includes a second transmission module for transmitting first information to a terminal, the first information comprising second information for indicating a second cell, wherein the first cell is one of the terminal's serving cells and the second cell is a cell different from the index of the first cell.

[0022] Embodiments of the present disclosure further provide a network device comprising a processor, memory, and a program stored in the memory and operable on the processor, wherein when the program is executed by the processor, the random access method described in any one of the above paragraphs is realized.

[0023] Embodiments of the present disclosure further provide a readable storage medium storing a program, wherein when the program is executed by a processor, the steps in the random access method described in any one of the above paragraphs are realized. [Effects of the Invention]

[0024] At least one of the above-described technical aspects of this disclosure has the following beneficial effects: By using the random access method described in the embodiments of this disclosure, when a first information instructing random access is transmitted to a terminal, a second information instructing a second cell triggers the transmission of a random access message to the second cell, and the first information instructing random access triggers the terminal to perform random access to the target cell (second cell). In other words, random access to the target cell is performed before handover, and random access to the target cell via the L3 handover process to acquire information such as TA and complete synchronization with the target cell is avoided. Therefore, the problem of high delay in the synchronization process with the target cell (non-serving cell) can be avoided. [Brief explanation of the drawing]

[0025] [Figure 1] This is a schematic diagram of a system architecture to which the random access method described in the embodiments of this disclosure applies. [Figure 2] This is a schematic flowchart of a random access method described in one of the embodiments of this disclosure. [Figure 3] This is a schematic flowchart of one embodiment using the method described in the embodiments of this disclosure. [Figure 4] This is a schematic flowchart of a random access method described in another embodiment of the present disclosure. [Figure 5] This is a schematic diagram of the structure of the apparatus described in the embodiments of this disclosure. [Figure 6] This is a schematic diagram of the structure of the network-side equipment described in the embodiments of this disclosure. [Figure 7]This is a schematic diagram of one structure of an embodiment of a random access device described in the embodiments of the present disclosure. [Figure 8] This is a schematic diagram of the structure of another embodiment of the random access device described in the embodiments of this disclosure. [Modes for carrying out the invention]

[0026] To further clarify the problems, technical embodiments, and advantages that this disclosure aims to solve, they will be described in detail below with reference to the drawings and specific embodiments.

[0027] The system architecture for applying the random access method described in the embodiments of this disclosure, as shown in Figure 1, includes at least one terminal 10 and at least one cell 20, each cell 20 which can correspond to one network-side device, such as a base station. Selectively, each terminal 10 corresponds to at least one serving cell and at least one non-serving cell. The different cells 20 are each capable of transmitting a measurement reference signal, the terminals are capable of reporting L1-RSRP measurement results of the non-serving cell's SSB, and the serving cell is capable of selecting a beam-serving terminal for the non-serving cell.

[0028] In related technologies, the need for a terminal to initiate random access to a target cell during the handover process to acquire information such as TA and complete synchronization with the target cell results in high delays during the synchronization process. To address this problem, the embodiments of this disclosure provide a random access method. When a first information instructing random access is sent to the terminal, a second information instructing a second cell triggers the transmission of a random access message to the second cell. In this embodiment, the second cell is a different cell from the index of the first cell, the first cell is one of the terminal's serving cells, and the second cell is a different target cell or non-serving cell. Therefore, using this embodiment, the first information instructing random access can trigger random access by the terminal to a non-serving cell. In other words, random access to the target cell is performed before the handover, avoiding the need to randomly access the target cell via the L3 handover process to acquire information such as TA and complete synchronization with the target cell. Thus, the problem of high delays during the synchronization process with the target cell (non-serving cell) can be avoided.

[0029] One embodiment of the present disclosure provides a random access method performed by a terminal, as shown in Figure 2, the method comprising the following steps S210 to S220.

[0030] S210 is the reception of first information transmitted from a first cell to instruct the terminal to perform random access, the first information including second information to instruct a second cell, wherein the first cell is one of the terminal's serving cells and the second cell is a cell with a different index from the first cell.

[0031] S220 is to send a random access message to the second cell in accordance with the first information.

[0032] In the embodiments of this disclosure, the first cell is one of the serving cells of the terminal, and the second cell is a cell different from the index of the first cell, that is, a target cell different from the first cell, and may selectively be a non-serving cell.

[0033] In embodiments of the present disclosure, after selectively sending a random access message to a second cell, the method further: The system further includes receiving a random access response message transmitted from the second cell, which includes time advance (TA) information of the second cell.

[0034] By using the random access method described in this embodiment, when the terminal's random access to the second cell (target cell) is triggered by the first information instructing random access, the second cell can send TA information to the terminal so that the terminal can complete synchronization with the second cell. As a result, the terminal can acquire the target cell's TA information during the L1 / L2-based handover process, and delays caused by random access during handover are reduced.

[0035] In one embodiment, the first information is selectively Downlink Control Information (DCI), which is instructed to be transmitted via a Physical Downlink Control Channel (PDCCH), and the DCI is intended to instruct a terminal to initiate random access. Selectively, the DCI is scrambled by a Cyclic Redundancy Check (CRC), has a DCI format of 1_0, and all Frequency Domain Resource Assignment (FDRA) fields are 1, but is not limited to this and can be specifically defined by the network configuration or protocol.

[0036] Compared to related technologies, the DCI that triggers the random access procedure instructs the terminal to send a random access message to the serving cell. By using the random access method described in this embodiment, the terminal can initiate a random access message to the target cell by specifying a target cell other than the serving cell in the DCI that triggers the random access procedure.

[0037] In embodiments of this disclosure, the second information is selectively included: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0038] Selectively, the random access resource index includes a random access channel (RACH) mask index.

[0039] As one embodiment, the method described above is selectively applied. The process further includes determining resource information for transmitting the random access message according to the second information and configuration information of at least one third cell, The second cell is one of the at least one third cell.

[0040] The aforementioned configuration information includes: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the Channel State Information Reference Signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0041] Selectively, RACH resources include dedicated RACH resources and / or common RACH resources.

[0042] As one embodiment, the method described above is selectively applied. The system further includes receiving the configuration information of at least one third cell transmitted from the first cell, optionally such configuration information being RRC configuration information, the third cell including the first cell and / or the second cell, and via such configuration information, the first cell transmits the RRC configuration of at least one third cell to the terminal.

[0043] Based on the configuration information of at least one third cell received, the terminal can receive beam measurement reference signals transmitted from at least one third cell, i.e., beam measurement reference signals transmitted from the first cell and / or the second cell, and perform beam measurements according to the beam measurement reference signals, and report the measurement result information. Then, the first cell (serving cell) can determine whether a handover of the terminal to the second cell is necessary based on the measurement result information reported from the terminal.

[0044] Using the random access method described in this embodiment, the terminal determines the second cell in which it needs to initiate random access, according to at least one of the following: the index of the second cell in the first information instructing the execution of random access, the configuration information index of the second cell, the reference signal index of the second cell, the random access resource index of the second cell, and the random preamble index of the second cell. In addition, it obtains the RACH resource (or RACH occasion), the relationship between the RACH resource and the SSB, the relationship between the RACH resource and the CSI-RS, etc., according to the configuration information of at least one third cell transmitted from the first cell, which has been obtained in advance. at least one of the following This allows us to determine the resource information that will send the random access message.

[0045] The resource information selectively determined for sending random access messages includes random preamble index (Random Access Preamble index or ra-PreambleIndex) information and time-frequency domain resource information.

[0046] In one embodiment, the first information optionally further includes a reference signal index. Sending a random access message to the second cell means This includes transmitting the random access message to the second cell using the same spatial parameters as the reference signal indicated by the reference signal index.

[0047] Selectively, the reference signal index includes the SSB index and / or the CSI index, of which the terminal transmits a random access message to the second cell using the same spatial parameters indicated by the reference signal index, where these spatial parameters include the spatial filter and / or beam.

[0048] Selectively, the reference signal indicated by the first information can be determined according to the reference signal index indicated in the first information and the beam measurement reference signal transmitted from the received second cell. In one embodiment, selectively, the reference signal index is one of the reference signal indices of the Channel Measurement Resource (CMR) in the Channel State Information (CSI) Report.

[0049] As one embodiment of the random access method described in the embodiments of this disclosure, the method is, selectively, The further includes calculating the transmission power of the random access message according to the reference signal and / or power information corresponding to the second cell.

[0050] As one embodiment, the method described above is selectively applied. This further includes determining the reference signal corresponding to the second cell according to the reference signal index in the second information.

[0051] The following formula may be used to calculate the transmission power for selectively sending random access messages to the second cell.

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[0052] Specifically, the path loss (PL) corresponding to the second cell may be calculated according to the index of the second cell and / or the reference signal index indicated by the second information. In other words, the cell index in the above transmission power calculation method is the index of the second cell.

[0053] In this case, the path loss PL may be calculated according to the SSB or CSI-RS of the second cell. For example, if a reference signal index is carried in the second information, the reference signal for the path loss PL can be determined according to the Physical Cell Identifier (PCI) index or configuration information index of the second cell, thereby further determining the path loss. Alternatively, the configuration information of the second cell may include a path loss reference signal, and the path loss PL can be determined according to that path loss reference signal.

[0054] It is possible to selectively determine Pcmax according to the PCI index or configuration information index and configuration information of the second cell in the second information.

[0055] Using the method described in the embodiments of this disclosure, the transmission power of the random access message can be calculated according to the determined path loss PL and Pcmax corresponding to the second cell.

[0056] Figure 3 is a schematic flowchart illustrating the random access method described in an embodiment of this disclosure. Using this embodiment, the random access method includes the following steps S301 to S306.

[0057] S301 is the first cell (serving cell) transmitting configuration information to the terminal, of which the configuration information is RRC configuration information and includes the RRC configuration of at least one third cell.

[0058] S302 is when the first cell and / or the second cell transmit a measurement reference signal to the terminal.

[0059] S303 is the process where the terminal performs beam measurements and reports the beam measurement results.

[0060] S304 is triggered when the first cell determines, based on beam measurement results, that a terminal handover to the second cell is necessary, and the transmission of the first information (PDCCH order) is to trigger random access of terminals to the second cell.

[0061] S305 is when the terminal sends a random access message to the second cell according to the first information.

[0062] S306 is the terminal receiving a random access response message (RAR) sent from the second cell, which includes the second cell's time advance (TA) information.

[0063] By using the random access method described in this embodiment, when the terminal's random access to the second cell (target cell) is triggered by the first information instructing random access, the second cell can send TA information to the terminal so that the terminal can complete synchronization with the second cell. As a result, the terminal can acquire the target cell's TA information during the L1 / L2-based handover process, and delays caused by random access during handover are reduced.

[0064] On the other hand, embodiments of the present disclosure further provide a random access method performed by a first cell, the method comprising the following step S401, as shown in Figure 4.

[0065] S401 is to send first information to the terminal, which is a first information for instructing the terminal to perform random access, the first information including second information for instructing a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell with a different index from the first cell.

[0066] Using the random access method described in this embodiment, the first cell triggers the terminal to perform random access to the second cell (target cell) via first information that triggers the terminal to perform random access to the terminal, and second information that instructs the terminal to perform random access to the second cell. The second cell then becomes able to send TA information to the terminal so that the terminal can complete synchronization with the second cell. As a result, the terminal can acquire the TA information of the target cell during the L1 / L2-based handover process, and delays caused by random access during handover are reduced.

[0067] Selectively, in such random access method, the second information includes: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0068] Selectively, in such random access methods, the method is Radio resource control (RRC) information including configuration information of at least one third cell, further comprising the second cell transmitting RRC information to the terminal, wherein the second cell is one of the at least one third cell. The aforementioned configuration information includes: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0069] One embodiment of the present disclosure further provides a terminal 500 including a transceiver 510 and a processor 520, as shown in Figure 5, wherein the transceiver 510 is First information transmitted from a first cell to instruct the terminal to perform random access, wherein the first information includes second information to indicate a second cell, and the first cell is one of the terminal's serving cells, and the second cell is a cell different from the index of the first cell, This is for sending a random access message to the second cell in accordance with the first information mentioned above.

[0070] Selectively, in such terminal, the transceiver 510 is This is a random access response message transmitted from the second cell, which is also for receiving a random access response message that includes time advance (TA) information from the second cell.

[0071] Selectively, in such terminal, the second information includes: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0072] Selectively, in such terminal, the processor 520, This is for determining the resource information to which the random access message is transmitted, according to the second information and the configuration information of at least one third cell. The second cell is one of the at least one third cell.

[0073] Selectively, the aforementioned terminal and the aforementioned configuration information include: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0074] Selectively, in such a terminal, the resource information includes the preamble index of random access preambles and / or the time-frequency domain resource from which the random access preambles are transmitted.

[0075] Selectively, in such a terminal, the first information further includes a reference signal index. Among these, the transceiver 510 transmits a random access message to the second cell, This includes transmitting the random access message to the second cell using the same spatial parameters as the reference signal indicated by the reference signal index.

[0076] Selectively, in such terminal, the processor 520, This is for calculating the transmission power of the random access message according to the reference signal and / or power information corresponding to the second cell.

[0077] Selectively, in such terminal, the processor 520, This also serves to determine the reference signal corresponding to the second cell according to the reference signal index in the second information.

[0078] Another embodiment of the present disclosure further provides network-side equipment applied to a first cell, as shown in Figure 6, the network-side equipment 600 includes a transceiver 610, the transceiver 610 is The first information is for instructing a terminal to perform random access, the first information including second information for indicating a second cell, wherein the first cell is one of the terminal's serving cells and the second cell is a cell with a different index from the first cell, and the first information is for transmitting the first information to the terminal.

[0079] Selectively, in such network-side equipment, the second information includes: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0080] Selectively, in such network-side equipment, the transceiver 610 is: Radio resource control (RRC) information including configuration information of at least one third cell, which is also for transmitting RRC information to the terminal in which the second cell is one of the at least one third cell. The aforementioned configuration information includes: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0081] Another embodiment of the present disclosure further provides a random access device applied to a terminal, as shown in Figure 7, the device, A receiving module 710 for receiving first information transmitted from a first cell to instruct the terminal to perform random access, wherein the first information includes second information to instruct a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell different from the index of the first cell. The system includes a first transmission module 720 for transmitting a random access message to the second cell in accordance with the first information.

[0082] Selectively, in such random access device, the receiving module 710 is This is a random access response message transmitted from the second cell, which is also for receiving a random access response message that includes time advance (TA) information from the second cell.

[0083] Selectively, in such a random access device, the second information includes: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0084] Selectively, in such random access device, the device is The system further includes a first processing module 730 for determining resource information for transmitting the random access message according to the second information and configuration information of at least one third cell, The second cell is one of the at least one third cell.

[0085] Selectively, the random access device and the configuration information include: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0086] Selectively, in such a random access device, the resource information includes the preamble index of the random access pilot and / or the time-frequency domain resources from which the pilot transmits.

[0087] Selectively, in such random access device, the first information further includes a reference signal index. Of these, the first transmission module 720 transmits a random access message to the second cell, This includes transmitting the random access message to the second cell using the same spatial parameters as the reference signal indicated by the reference signal index.

[0088] Selectively, in such random access device, the device is The system further includes a second processing module 740 for calculating the transmission power of the random access message according to a reference signal and / or power information corresponding to the second cell.

[0089] Selectively, in such random access device, the second processing module 740 is: This also serves to determine the reference signal corresponding to the second cell according to the reference signal index in the second information.

[0090] Another embodiment of the present disclosure further provides a random access device operated by a first cell, as shown in Figure 8, the device, The system includes a second transmission module 810 for transmitting first information to a terminal, which is first information for instructing the terminal to perform random access, wherein the first information includes second information for instructing a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell with a different index from the first cell.

[0091] Selectively, in such a random access device, the second information includes: The index of the second cell, The configuration information index of the second cell, The reference signal index of the second cell, The random access resource index of the second cell, It includes one or more of the random preamble indices of the second cell.

[0092] Selectively, in such random access device, the second transmission module 810 is: Radio resource control (RRC) information including configuration information of at least one third cell, which is also for transmitting RRC information to the terminal in which the second cell is one of the at least one third cell. The aforementioned configuration information includes: Random Access Channel (RACH) resources and Random Access Channel Transmission Opportunity (RACH occasion), The relationship between the RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occasion and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occasion and CSI-RS, Index of configuration information, This includes one or more pieces of information, such as the maximum transmit power (Pcmax).

[0093] Another embodiment of the present disclosure further provides a network device comprising a processor, memory, and a program stored in the memory and operable on the processor, wherein when the program is executed by the processor, the random access method described in any one of the above paragraphs is realized.

[0094] In the embodiments of this disclosure, the network equipment may be the terminal or network-side equipment applied to the first cell. Specific embodiments of how the processor of the network-side equipment of the terminal or first cell performs the random access method can be found in the detailed descriptions of the corresponding embodiments of the random access method described above and will not be repeated here.

[0095] Furthermore, a specific embodiment of this disclosure provides a readable storage medium storing a computer program, wherein when the program is executed by a processor, the steps in the random access method described in any one of the above paragraphs are realized.

[0096] Specifically, the computer-readable storage medium is applied to the terminal described above, or to network-side equipment applied to the first cell. When applied to a terminal or network-side equipment, the execution steps in the corresponding random access method are as described in detail above and will not be repeated here.

[0097] It should be understood that in some embodiments of this disclosure, the disclosed methods and apparatus may be implemented in other ways. For example, the apparatus embodiments described above are illustrative only. For example, the division of the units is merely a division by logical function, and other division methods may be possible in actual implementation. For example, multiple units or components may be combined or integrated into another system, and some features may be ignored or not implemented. Furthermore, the mutual coupling, direct coupling or communication connection shown or described may be implemented using some interfaces. Indirect coupling or communication connection between devices or units may be in electronic, mechanical, or other forms.

[0098] Furthermore, each functional unit in each embodiment of this disclosure may be integrated into a single processing unit, each unit may be physically provided individually, or two or more units may be integrated into a single unit. The integrated unit may be implemented in hardware form, or in a form in which software functional units are added to the hardware.

[0099] The integrated unit, implemented in the form of the software function unit described above, may be stored in a computer-readable storage medium. The software function unit, stored in the storage medium, includes several instructions that cause a computer device (which may be a personal computer, server, or network device, etc.) to execute some of the steps of the transmission and reception method described in each embodiment of this disclosure. The storage medium includes various media capable of storing program code, such as USB flash drives, portable hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0100] The foregoing describes preferred embodiments of the Disclosure, and it should be noted that those skilled in the art can make some further improvements and modifications without departing from the principles described in the Disclosure, and such improvements and modifications should also be considered within the scope of the Disclosure.

Claims

1. A random access method performed by a terminal, wherein the method is Receiving first information transmitted from a first cell to instruct the terminal to perform random access, wherein the first information includes second information to instruct a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell with a different index from the first cell; This includes sending a random access message to the second cell in accordance with the first information, The aforementioned first information is downlink control information (DCI), The second piece of information mentioned above includes: The configuration information index of the second cell, The reference signal index of the second cell, and one or more of the following are included: Random access method.

2. The aforementioned method, The random access method according to claim 1, further comprising receiving a random access response message transmitted from the second cell, the random access response message containing time advance (TA) information of the second cell.

3. The aforementioned second piece of information further includes: The index of the second cell, The random access resource index of the second cell, The random access method according to claim 1, comprising one or more of the random preamble indices of the second cell.

4. The aforementioned method, Receiving radio resource control (RRC) information transmitted from the first cell, which includes configuration information of at least one third cell, The process further includes determining resource information for transmitting the random access message according to the second information and the configuration information of at least one third cell, The random access method according to claim 3, wherein the second cell is one of the at least one third cell.

5. The aforementioned configuration information includes: Random Access Channel (RACH) resources and Random access channel transmission opportunity (RACH occasion), The relationship between the aforementioned RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occurrence and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occurrence and CSI-RS, Index of configuration information, The random access method according to claim 4, wherein one or more pieces of information are included, including the maximum transmission power (Pcmax).

6. The random access method according to claim 4, wherein the resource information includes a preamble index for a random access pilot and / or a time-frequency domain resource from which to transmit the pilot.

7. The aforementioned first information further includes a reference signal index, Sending a random access message to the second cell means The random access method according to claim 1, comprising transmitting the random access message to the second cell using the same spatial parameters as the reference signal indicated by the reference signal index.

8. The aforementioned method, The random access method according to claim 1, further comprising calculating the transmission power of the random access message according to a reference signal and / or power information corresponding to the second cell.

9. The aforementioned method, The random access method according to claim 8, further comprising determining the reference signal corresponding to the second cell according to the reference signal index in the second information.

10. A random access method performed by a first cell, wherein the method is The first information for instructing a terminal to perform random access includes transmitting the first information to the terminal, wherein the first information includes second information for instructing a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell different from the index of the first cell. The aforementioned first information is downlink control information (DCI), The second piece of information mentioned above includes: The configuration information index of the second cell, A random access method that includes one or more of the reference signal indices of the second cell.

11. The aforementioned second piece of information further includes: The index of the second cell, The random access resource index of the second cell, The random access method according to claim 10, comprising one or more of the random preamble index of the second cell.

12. The aforementioned method, Radio resource control (RRC) information including configuration information of at least one third cell, further comprising the second cell transmitting RRC information which is one of the at least one third cell to the terminal, The aforementioned configuration information includes: Random Access Channel (RACH) resources and Random access channel transmission opportunity (RACH occasion), The relationship between the aforementioned RACH resource and the synchronization signal block (SSB), The relationship between the aforementioned RACH occurrence and SSB, The relationship between the RACH resource and the channel status information reference signal (CSI-RS), The relationship between the aforementioned RACH occurrence and CSI-RS, Index of configuration information, The random access method according to claim 10, wherein one or more pieces of information are included, including the maximum transmission power (Pcmax).

13. A random access device applied to a terminal, wherein the device is A receiving module for receiving first information transmitted from a first cell to instruct the terminal to perform random access, wherein the first information includes second information to instruct a second cell, the first cell being one of the terminal's serving cells, and the second cell being a cell different from the index of the first cell. Includes a first transmission module for sending a random access message to the second cell in accordance with the first information, The aforementioned first information is downlink control information (DCI), The second piece of information mentioned above includes: The configuration information index of the second cell, The reference signal index of the second cell, and one or more of the following are included: Random access device.

14. A random access device performed by a first cell, wherein the device is A first information for instructing a terminal to perform random access, the first information includes a second information for indicating a second cell, wherein the first cell is one of the terminal's serving cells and the second cell is a cell different from the index of the first cell, and a second transmission module for transmitting the first information to the terminal. The aforementioned first information is downlink control information (DCI), The second piece of information mentioned above includes: The configuration information index of the second cell, The reference signal index of the second cell, and one or more of the following are included: Random access device.

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