Random Access Method, Apparatus, Terminal, and Network Side Device

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, the entire content of which is incorporated herein by reference. The present disclosure relates to the field of wireless technologies, 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 L1 / L2 control signaling is used to complete handover for reducing latency. Considering that a source base station (serving cell) can configure in advance for a terminal a plurality of candidate cells or target cells, and radio resource control (RRC) of these cells, etc., one of the RRC configurations is activated / deactivated according to the L1 measurement result to complete the handover.

[0004] In the case of an asynchronous scenario, it is necessary to obtain the timing advance (TA) information of the target cell. In the conventional handover process, the terminal needs to start a random access with the target cell in the layer 3 procedure to obtain information such as TA and complete synchronization with the target cell. Using this method will cause a problem of high delay in the synchronization process between the terminal and the target cell (non-serving cell), and it cannot meet the need for delay reduction. Summary of the Invention Problems to be Solved by the Invention

[0005] An object of the technical aspect of the present disclosure is to provide a random access method, apparatus, terminal, and network-side device for solving the problem of high delay existing in the synchronization process between a terminal and a target cell (non-serving cell) in related technologies. Means for Solving the Problems

[0006] The present disclosure provides a random access method executed by a terminal, the method comprising: Receiving first information transmitted from a first cell 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell; Transmitting a random access message to the second cell according to the first information.

[0007] Optionally, in such a random access method, the method further comprises: Receiving a random access response message transmitted from the second cell, the random access response message including the time advance (TA) information of the second cell.

[0008] Optionally, in such a random access method, the second information includes the index of the second cell, and the configuration information index of the second cell, and the reference signal index of the second cell, and the random access resource index of the second cell, and the random preamble index of the second cell, including one or more of them.

[0009] Optionally, in such a random access method, the method 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, wherein the second cell is one of the at least one third cell.

[0010] Optionally, in such a random access method, the configuration information includes a random access channel (RACH) resource, and a random access channel transmission opportunity (RACH occasion), and the relationship between the RACH resource and a synchronization signal block (SSB), and the relationship between the RACH occasion and the SSB, and the relationship between the RACH resource and a channel state information reference signal (CSI-RS), and the relationship between the RACH occasion and the CSI-RS, and the index of the configuration information, and the maximum transmission power (Pcmax), including one or more pieces of information.

[0011] Optionally, in such a random access method, the resource information includes a preamble index of a random access pilot and / or a time-frequency domain resource for transmitting the pilot.

[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 is including 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 including transmitting, to a terminal, 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell.

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

[0017] Optionally, in such a random access method, the method comprises: Transmitting, to the terminal, radio resource control (RRC) information including configuration information of at least one third cell, where the second cell is one of the at least one third cell, and the RRC information indicates the second 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; One or more pieces of information including the maximum transmission power (Pcmax).

[0018] Embodiments of the present disclosure provide 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, 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; Further provides a terminal for transmitting a random access message to the second cell according to the first information.

[0019] Embodiments of the present disclosure provide a network-side device including a transceiver and applicable to a first cell, where the transceiver: First information for instructing 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 further provides a network-side device for transmitting the first information to the terminal.

[0020] An embodiment of the present disclosure is a random access device applied to a terminal, and the device includes: A receiving module for receiving first information transmitted from a first cell and for instructing the 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 a first transmission module for transmitting a random access message to the second cell according to the first information, and further provides a random access device.

[0021] An embodiment of the present disclosure is a random access device executed by a first cell, and the device includes: A second transmission module for transmitting to the terminal first information for instructing the 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 further provides a random access device.

[0022] An embodiment of the present disclosure is a network device including a processor, a memory, and a program stored in the memory and operable on the processor. When the program is executed by the processor, the random access method according to any one of the above items is realized, and further provides a network device.

[0023] An embodiment of the present disclosure further provides a readable storage medium storing a program, where when the program is executed by a processor, the steps in the random access method described in any one of the above are realized.

Advantages of the Invention

[0024] At least one of the above technical aspects of the present disclosure has the following beneficial effects. When using the random access method described in the embodiment of the present disclosure, when transmitting the first information indicating random access to the terminal, the transmission of the random access message to the second cell is triggered by the second information indicating the second cell, and the execution of the random access by the terminal to the target cell (the second cell) can be triggered by the first information indicating random access, that is, the random access to the target cell is performed before handover, and it is avoided to perform random access to the target cell through the L3 handover process in order to obtain information such as TA and complete synchronization with the target cell. Therefore, the problem of high delay in the synchronization process with the target cell (non-serving cell) can be avoided.

Brief Description of the Drawings

[0025]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0026] In order to make the problems, technical solutions, and advantages to be solved by the present disclosure clearer, the following will be described in detail with reference to the drawings and specific embodiments.

[0027] As shown in FIG. 1, the application system architecture of the random access method described in an embodiment of the present disclosure includes at least one terminal 10 and at least one cell 20. Each cell 20 can correspond to one network-side device, for example, a base station. Among them, optionally, each terminal 10 corresponds to at least one serving cell and at least one non-serving cell. Different cells 20 can each transmit a measurement reference signal, the terminal can report the L1-RSRP measurement result of the SSB of the non-serving cell, and the serving cell can select a beam-serving terminal of the non-serving cell.

[0028] In order to solve the problem of high latency in the synchronization process due to the need for a terminal in the related art to start a random access with a target cell during a handover process to obtain information such as TA and complete synchronization with the target cell, an embodiment of the present disclosure provides a random access method. When transmitting first information instructing a random access to a terminal, the transmission of a random access message to a second cell is triggered by second information instructing the second cell, where the second cell is a cell different from the index of the first cell, the first cell is one of the serving cells of the terminal, and the second cell may be a target cell different from the serving cell or a non-serving cell. Therefore, by using this embodiment, it is possible to trigger a random access of the terminal to a non-serving cell by the first information instructing a random access, that is, a random access to the target cell is performed before handover, and it is avoided to perform a random access to the target cell through an L3 handover process to obtain information such as TA and complete synchronization with the target cell. Therefore, the problem of high latency in the synchronization process with the target cell (non-serving cell) can be avoided.

[0029] As shown in FIG. 2, one embodiment of the present disclosure provides a random access method executed by a terminal, and the method includes the following steps S210 to S220.

[0030] S210 is to receive first information transmitted from a first cell and instructing the terminal to perform a 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.

[0031] S220 is to transmit a random access message to the second cell according to the first information.

[0032] In an embodiment of the present 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 optionally, it may be a non-serving cell.

[0033] In an embodiment of the present disclosure, optionally, after transmitting a random access message to the second cell, the method further includes receiving a random access response message transmitted from the second cell, where the random access response message includes time advance (TA) information of the second cell.

[0034] Using the random access method described in this embodiment, when the random access of the terminal to the second cell (target cell) is triggered by the first information indicating random access, the second cell can transmit TA information to the terminal so that the terminal can complete synchronization with the second cell. Therefore, the terminal can obtain the TA information of the target cell during the handover process based on L1 / L2, and the delay caused by random access during the handover is reduced.

[0035] As one of the embodiments, optionally, the first information is downlink control information (DCI), and the transmission is instructed via a physical downlink control channel (PDCCH). The DCI is for instructing the terminal to start random access. Optionally, the DCI is scrambled by a cyclic redundancy check (CRC), and the DCI format is 1_0, and all fields of the frequency domain resource assignment (FDRA) are 1, but it is not particularly limited thereto. Specifically, it can be defined by the configuration or protocol on the network side.

[0036] Compared with related technologies, DCI that triggers a random access procedure is used to instruct a terminal to send a random access message to a serving cell. By using the random access method described in this embodiment, by instructing a target cell other than the serving cell in the DCI that triggers the random access procedure, the terminal can start a random access message to the target cell.

[0037] In an embodiment of the present disclosure, optionally, the second information includes the index of the second cell, and the configuration information index of the second cell, and the reference signal index of the second cell, and the random access resource index of the second cell, and the random preamble index of the second cell, and one or more of them are included.

[0038] Optionally, the random access resource index includes a mask index of a Random Access Channel (RACH).

[0039] As one of the embodiments, optionally, the method 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, wherein the second cell is one of the at least one third cell.

[0040] The configuration information includes a random access channel (RACH) resource, and a random access channel transmission opportunity (RACH occasion), and the relationship between the RACH resource and a synchronization signal block (SSB), and the relationship between the RACH occasion and the SSB, and The association relationship between the RACH resource and the Channel State Information Reference Signal (CSI-RS), and the association relationship between the RACH occasion and the CSI-RS, and the index of the configuration information, and include one or more pieces of information among the maximum transmission power (Pcmax).

[0041] Optionally, the RACH resource includes a dedicated RACH resource and / or a common RACH resource.

[0042] As one of the embodiments, optionally, the method further includes receiving the configuration information of at least one third cell transmitted from the first cell, and optionally, the configuration information is RRC configuration information, the third cell includes the first cell and / or the second cell, and through the configuration information, the first cell transmits the RRC configuration of at least one third cell to the terminal.

[0043] Among them, according to the received configuration information of at least one third cell, the terminal can receive the beam measurement reference signal transmitted from at least one third cell, that is, the beam measurement reference signal transmitted from the first cell and / or the second cell, and perform beam measurement according to the beam measurement reference signal and report the measurement result information. Then, the first cell (serving cell) can determine whether it is necessary to hand over the terminal to the second cell according to the measurement result information reported by the terminal.

[0044] If the random access method described in this embodiment is used, the terminal determines a second cell for which the terminal needs to start random access according to at least one of 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, and the random access preamble index of the second cell in the first information for instructing the execution of random access. Further, according to the configuration information acquired in advance and according to the configuration information of at least one third cell transmitted from the first cell, the terminal can determine resource information for transmitting the random access message by using the RACH resource (or RACH occasion) indicated by the configuration information, the association relationship between the RACH resource and the SSB, the association relationship between the RACH resource and the CSI-RS, and the like.

[0045] Optionally, the resource information determined for transmitting the random access message includes random access preamble index (Random Access Preamble index or ra-PreambleIndex) information and time-frequency domain resource information.

[0046] As one of the embodiments, optionally, the first information further includes a reference signal index. Transmitting the random access message to the second cell includes transmitting the random access message to the second cell by using the same spatial parameters as the reference signal indicated by the reference signal index.

[0047] Optionally, the reference signal index includes an SSB index and / or a CSI index. Among them, the terminal transmits the random access message to the second cell by using the same spatial parameters as those indicated by the reference signal index. Here, the spatial parameters include a spatial filter and / or a beam.

[0048] Optionally, 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. As one of the embodiments, optionally, the reference signal index is one of the reference signal indexes of the channel measurement resources (CMRs) in the channel state information (CSI) report.

[0049] As one of the embodiments of the random access method described in the embodiments of the present disclosure, optionally, 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.

[0050] As one of the embodiments, optionally, the method further includes determining the reference signal corresponding to the second cell according to the reference signal index in the second information.

[0051] Optionally, the calculation method of the transmission power for transmitting the random access message to the second cell may use the following formula.

Equation

Equation

Equation

Number

Number

Number

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

[0053] Among them, the path loss PL may be calculated according to the SSB or CSI-RS of the second cell. For example, when the reference signal index is carried in the second information, the reference signal of the path loss PL can be determined according to the Physical Cell Identifier (PCI) index or the configuration information index of the second cell, so that the path loss is further determined. Optionally, the configuration information of the second cell includes a path loss reference signal, and the path loss PL can be determined according to the path loss reference signal.

[0054] Optionally, Pcmax can be determined according to the PCI index or the configuration information index and the configuration information of the second cell in the second information.

[0055] By using the method described in the embodiments of the present 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] FIG. 3 is a flow schematic diagram using the random access method described in the embodiments of the present disclosure. Using this embodiment, the random access method includes the following steps S301 to S306.

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

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

[0059] S303 is that the terminal performs beam measurement and reports beam measurement result information.

[0060] S304 is that when the first cell determines, according to the beam measurement result information, that it is necessary to hand over the terminal to the second cell, the first cell triggers the transmission of first information (PDCCH order), and the PDCCH order is for triggering the random access of the terminal to the second cell.

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

[0062] S306 is that the terminal receives a random access response message RAR transmitted from the second cell, and the random access response message RAR includes the time advance TA information of the second cell.

[0063] If the random access method described in this embodiment is used, when the random access of the terminal to the second cell (target cell) is triggered by the first information indicating random access, the second cell can send TA information to the terminal so that the terminal can complete synchronization with the second cell. Therefore, the terminal can obtain the TA information of the target cell during the handover process based on L1 / L2, and the delay caused by random access during handover is reduced.

[0064] On the other hand, the embodiment of the present disclosure further provides a random access method executed by the first cell. As shown in FIG. 4, the method includes the following step S401.

[0065] S401 is to send the first information for instructing the terminal to execute random access to the terminal. The first information includes the second information for instructing the 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.

[0066] If the random access method described in this embodiment is used, when the first cell triggers the terminal to execute random access to the second cell (target cell) through the first information for triggering the terminal to execute random access and the second information for instructing the second cell to the terminal, the second cell can send TA information to the terminal so that the terminal can complete synchronization with the second cell. Therefore, the terminal can obtain the TA information of the target cell during the handover process based on L1 / L2, and the delay caused by random access during handover is reduced.

[0067] Optionally, in such a random access method, the second information includes the index of the second cell, and the configuration information index of the second cell, and the reference signal index of the second cell, and the random access resource index of the second cell, and One or more of them are included in the random preamble index of the second cell.

[0068] Optionally, in such a random access method, the method is radio resource control (RRC) information including configuration information of at least one third cell, and further includes transmitting, to the terminal, RRC information in which the second cell is one of the at least one third cell, wherein the configuration information includes a random access channel (RACH) resource, a random access channel transmission opportunity (RACH occasion), the relationship between the RACH resource and a synchronization signal block (SSB), the relationship between the RACH occasion and the SSB, the relationship between the RACH resource and a channel state information reference signal (CSI-RS), the relationship between the RACH occasion and the CSI-RS, an index of the configuration information, and one or more of them are included in the maximum transmission 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 FIG. 5. The transceiver 510 receives first information transmitted from a first cell and 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell, and is for transmitting a random access message to the second cell according to the first information.

[0070] Optionally, in such a terminal, the transceiver 510 It is also for receiving a random access response message transmitted from the second cell and including time advance (TA) information of the second cell.

[0071] Optionally, in such a terminal, the second information includes an index of the second cell, and a configuration information index of the second cell, and a reference signal index of the second cell, and a random access resource index of the second cell, and a random preamble index of the second cell, and one or more of them are included.

[0072] Optionally, in such a terminal, the processor 520 is for determining resource information for transmitting the random access message according to the second information and configuration information of at least one third cell, and the second cell is one of the at least one third cell.

[0073] Optionally, in the terminal, the configuration information includes a random access channel (RACH) resource, and a random access channel transmission opportunity (RACH occasion), and the relationship between the RACH resource and a synchronization signal block (SSB), and the relationship between the RACH occasion and the SSB, and the relationship between the RACH resource and a channel state information reference signal (CSI-RS), and the relationship between the RACH occasion and the CSI-RS, and an index of the configuration information, and a maximum transmission power (Pcmax), and one or more of the information are included.

[0074] Optionally, in such a terminal, the resource information includes a preamble index of random access preambles and / or a time-frequency resource for transmitting the preambles (random access preambles).

[0075] Optionally, in such a terminal, the first information further includes a reference signal index. Among them, the transceiver 510 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.

[0076] Optionally, in such a terminal, the processor 520 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] Optionally, in such a terminal, the processor 520 is also for determining 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 a network-side device applied to a first cell. As shown in FIG. 6, the network-side device 600 includes a transceiver 610, and the transceiver 610 is for 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.

[0079] Optionally, in such a network-side device, the second information includes the index of the second cell, and the configuration information index of the second cell, and the reference signal index of the second cell, and the random access resource index of the second cell, and the random preamble index of the second cell, wherein one or more of them are included.

[0080] Optionally, in such a network-side device, the transceiver 610 is radio resource control (RRC) information including configuration information of at least one third cell, and is also for transmitting, to the terminal, RRC information that the second cell is one of the at least one third cell, wherein the configuration information includes a random access channel (RACH) resource, and a random access channel transmission opportunity (RACH occasion), and the relationship between the RACH resource and a synchronization signal block (SSB), and the relationship between the RACH occasion and the SSB, and the relationship between the RACH resource and a channel state information reference signal (CSI-RS), and the relationship between the RACH occasion and the CSI-RS, and the index of the configuration information, and wherein one or more pieces of information of a maximum transmission power (Pcmax) are included.

[0081] Another embodiment of the present disclosure further provides a random access device applied to a terminal. As shown in FIG. 7, the device includes a receiving module 710 configured to receive first information transmitted from a first cell for instructing the 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. A first transmission module 720 for transmitting a random access message to the second cell according to the first information is included.

[0082] Optionally, in such a random access device, the receiving module 710 is also for receiving a random access response message transmitted from the second cell, the random access response message including the time advance (TA) information of the second cell.

[0083] Optionally, 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, and / or the random preamble index of the second cell, one or more of them.

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

[0085] Optionally, in the above random access device, the configuration information includes a random access channel (RACH) resource, a random access channel transmission opportunity (RACH occasion), the relationship between the RACH resource and a synchronization signal block (SSB), the relationship between the RACH occasion and the SSB, the relationship between the RACH resource and a channel state information reference signal (CSI-RS), The association relationship between the RACH occasion and the CSI-RS, and the index of the configuration information, and one or more of the maximum transmission power (Pcmax) are included.

[0086] Optionally, in such a random access device, the resource information includes a preamble index of a random access pilot and / or a time-frequency domain resource for transmitting the pilot.

[0087] Optionally, in such a random access device, the first information further includes a reference signal index, wherein the first transmission module 720 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.

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

[0089] Optionally, in such a random access device, the second processing module 740 is also for determining 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 executed by a first cell. As shown in FIG. 8, the device A second transmission module 810 for transmitting to a terminal 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell.

[0091] Optionally, in such a random access device, the second information includes the index of the second cell, and the configuration information index of the second cell, and the reference signal index of the second cell, and the random access resource index of the second cell, and the random preamble index of the second cell, including one or more of them.

[0092] Optionally, in such a random access device, the second transmission module 810 is radio resource control (RRC) information including configuration information of at least one third cell, and is also for transmitting to the terminal RRC information that the second cell is one of the at least one third cell, the configuration information includes a random access channel (RACH) resource, and a random access channel transmission opportunity (RACH occasion), and the relationship between the RACH resource and a synchronization signal block (SSB), and the relationship between the RACH occasion and the SSB, and the relationship between the RACH resource and a channel state information reference signal (CSI-RS), and the relationship between the RACH occasion and the CSI-RS, and the index of the configuration information, and the maximum transmission power (Pcmax), including one or more pieces of information.

[0093] Another embodiment of the present disclosure is a network device including a processor, a memory, and a program stored in the memory and operable on the processor. When the program is executed by the processor, the random access method according to any one of the above is realized. The present disclosure further provides a network device.

[0094] In an embodiment of the present disclosure, the network device may be the above terminal or a network-side device applied to the first cell. For specific embodiments in which the processor of the terminal or the network-side device of the first cell executes the random access method, reference may be made to the detailed description of the corresponding specific embodiments in the above random access method, and details will not be repeated here.

[0095] Further, a specific embodiment of the present disclosure is a readable storage medium storing a computer program. When the program is executed by a processor, the steps in the random access method according to any one of the above are realized. The present disclosure further provides a readable storage medium.

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

[0097] In some embodiments according to the present disclosure, it should be understood that the disclosed methods and apparatuses can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of the above units is only a division in terms of logical functions, and there may be other division methods in actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not implemented. Furthermore, the disclosed, described, or illustrated mutual coupling, direct coupling, or communication connection may be implemented using some interfaces. The indirect coupling or communication connection between apparatuses or units may be in an electronic form, a mechanical form, or other forms.

[0098] Also, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may be physically provided individually, or two or more units may be integrated into one unit. The above integrated unit may be realized in the form of hardware, or may be realized in the form of adding a software functional unit to the hardware.

[0099] The integrated unit realized in the form of the above software functional unit may be stored in a computer-readable storage medium. The above software functional unit is stored in the storage medium and includes some instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to execute a part of the steps of the transmission and reception method described in each embodiment of the present disclosure. The above storage medium includes various media that can store program codes, such as a USB flash drive, a portable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0100] The above is the preferred embodiment of the present disclosure. It should be noted that for those skilled in the art, on the premise of not departing from the principles described in the present disclosure, it is possible to further make some improvements and refinements, and these improvements and refinements should also be regarded as within the protection scope of the present disclosure.

Claims

1. A random access method executed by a terminal, the method comprising: Receiving first information transmitted from a first cell and 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell; Transmitting a random access message to the second cell according to the first information.

2. The method further comprises: Receiving a random access response message transmitted from the second cell and including time advance (TA) information of the second cell.

3. 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; One or more of the random preamble indices of the second cell.

4. The method further comprises: 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 second cell being one of the at least one third cell.

5. The configuration information includes: Random access channel (RACH) resources; Random access channel transmission opportunity (RACH occasion); The relationship between the RACH resource and the synchronization signal block (SSB); The relationship between the RACH occasion and the SSB; The relationship between the RACH resource and the channel state information reference signal (CSI-RS); The relationship between the RACH occasion and the CSI-RS; The index of the configuration information; One or more of the maximum transmission power (Pcmax).

6. The resource information includes a preamble index of a random access pilot and / or a time-frequency domain resource for transmitting the pilot.

7. The first information further includes a reference signal index, transmitting the 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, according to the random access method of claim 1.

8. 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, according to the random access method of claim 1.

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

10. A random access method executed by a first cell, the method includes transmitting, to the terminal, 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell.

11. 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, and one or more of the random preamble index of the second cell, according to the random access method of claim 10.

12. The method further includes transmitting, to the terminal, radio resource control (RRC) information including configuration information of at least one third cell, the second cell being one of the at least one third cell, the configuration information includes a random access channel (RACH) resource, a random access channel transmission opportunity (RACH occasion), the relationship between the RACH resource and a synchronization signal block (SSB), the relationship between the RACH occasion and the SSB, the relationship between the RACH resource and a channel state information reference signal (CSI-RS), the relationship between the RACH occasion and the CSI-RS, and the index of the configuration information, The random access method according to claim 10, including one or more pieces of information out of the maximum transmission power (Pcmax).

13. A terminal including a transceiver, wherein the transceiver receives first information transmitted from a first cell 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell; A terminal for transmitting a random access message to the second cell according to the first information.

14. A network-side device applied to a first cell and including a transceiver, wherein the transceiver is for transmitting to a terminal 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell.

15. A random access device applied to a terminal, the device including a receiving module for receiving first information transmitted from a first cell 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell; A random access device including a first transmission module for transmitting a random access message to the second cell according to the first information.

16. A random access device executed by a first cell, the device including a second transmission module for transmitting to a terminal 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 serving cells of the terminal, and the second cell being a cell different from the index of the first cell.

17. A network device including a processor, a 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 according to any one of claims 1 to 9 is realized, or the random access method according to any one of claims 10 to 12 is realized.

18. A readable storage medium storing a program, wherein when the program is executed by a processor, steps in the random access method according to any one of claims 1 to 9 are realized, or steps in the random access method according to any one of claims 10 to 12 are realized.

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