CN113645685B - Initial access method, device, mobile terminal and computer readable storage medium - Google Patents

Initial access method, device, mobile terminal and computer readable storage medium Download PDF

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Publication number
CN113645685B
CN113645685B CN202010394300.8A CN202010394300A CN113645685B CN 113645685 B CN113645685 B CN 113645685B CN 202010394300 A CN202010394300 A CN 202010394300A CN 113645685 B CN113645685 B CN 113645685B
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parameter
signal block
synchronization signal
random access
adjustment
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CN113645685A (en
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图西卡·克兰西·库马尔
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Oneplus Technology Shenzhen Co Ltd
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Oneplus Technology Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/005—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by adjustment in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0095—Synchronisation arrangements determining timing error of reception due to propagation delay estimated based on signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]

Abstract

The embodiment of the invention provides an initial access method, an initial access device, a mobile terminal and a computer readable storage medium, which are applied to the mobile terminal, wherein the method comprises the following steps: acquiring a first parameter of network configuration, wherein the first parameter is used for selecting a synchronous signal block; performing incremental adjustment on the first parameter to obtain a second parameter; selecting a corresponding synchronization signal block according to the second parameter, wherein each synchronization signal block is associated with a corresponding random access channel resource; and sending the random access preamble to the base station by utilizing the associated random access channel resource for initial access. The technical scheme of the invention can realize the triggering of early beam measurement on the random access information resource, and can also improve the initial access success rate between the mobile terminal and the base station, and the like.

Description

Initial access method, device, mobile terminal and computer readable storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an initial access method, an initial access device, a mobile terminal, and a computer-readable storage medium.
Background
The initial access procedure refers to a procedure in which a user establishes an initial link connection with a base station. The initial access mechanism including the random access procedure plays an important role in providing uplink synchronization and allocating resources for an uplink physical shared channel (PUSCH). Millimeter wave communication systems typically employ Beamforming (Beamforming) techniques, i.e., focusing the beam energy in a certain direction by using weighting factors. In a 5G new air interface (NR), when performing initial access, a user equipment needs to perform initial link connection with a base station device by using Beam forming (Beam forming).
However, under the current third generation partnership project (3GPP) mechanism, when a 5G cell is added to a user equipment, a Random Access (RACH) failure often occurs particularly in an edge region of the cell due to a path loss caused by a moving speed of the equipment and a coverage limitation of beamforming.
Disclosure of Invention
In view of the above, the present invention provides an initial access method, apparatus, mobile terminal and computer readable storage medium to overcome the disadvantages in the prior art.
An embodiment of the present invention provides an initial access method, which is applied to a mobile terminal, and includes:
acquiring a first parameter of network configuration, wherein the first parameter is used for selecting a synchronization signal block;
performing incremental adjustment on the first parameter to obtain a second parameter;
selecting a corresponding synchronization signal block according to the second parameter, wherein each synchronization signal block is associated with a corresponding random access channel resource;
and sending a random access preamble to a base station by utilizing the associated random access channel resource for initial access.
In one embodiment, the first parameter is rsrp-threshold ssb and the second parameter is an adjustment value resulting from incremental adjustment of the rsrp-threshold ssb; the selecting the corresponding synchronization signal block according to the second parameter comprises:
determining whether there is at least one synchronization signal block with a SS-RSRP higher than the adjustment value, wherein the at least one synchronization signal block is transmitted by the base station;
if yes, selecting one of the synchronous signal blocks with SS-RSRP higher than the adjusting value; otherwise, a sync signal block is selected arbitrarily.
In one embodiment, before the incrementally adjusting the first parameter, the method further includes: obtaining a delta value for adjustment, wherein the obtaining of the delta value comprises:
acquiring the current moving speed of the mobile terminal;
determining a current moving speed grade according to the moving speed, wherein the mobile terminal is provided with a plurality of moving speed grades, and different moving speed grades correspond to different adjustment suggested values;
determining a target adjustment suggestion value according to the current movement speed grade;
taking the target adjustment suggestion value as the delta value.
In one embodiment, before the incrementally adjusting the first parameter, the method further includes: obtaining a delta value for adjustment, wherein the obtaining of the delta value comprises:
acquiring the identification and the signal quality of a cell in which the base station is positioned;
judging whether the identification and the signal quality of the cell are matched with the identification and the signal quality of the cell stored in the mobile terminal, wherein the stored cell is corresponding to a historical increment value;
and when the identifiers and the signal quality of the same cells are matched, taking the historical increment value corresponding to the same cells as the increment value.
In some embodiments, the increment value ranges from 2 to 10.
In an embodiment, the initial access method further includes:
detecting whether a beam failure occurs;
when the beam failure is detected, acquiring a third parameter, and performing incremental adjustment on the third parameter to obtain a fourth parameter;
selecting a new synchronization signal block according to the second parameter, wherein the new synchronization signal block is associated with corresponding random access channel resources;
and sending a random access preamble to the base station by using the associated random access channel resource to perform beam failure recovery.
In an embodiment, if the cell in which the base station is located is configured with a supplemental uplink, the first parameter is rsrp-threshold ssb-SUL.
Another embodiment of the present invention provides an initial access apparatus applied to a mobile terminal, including:
the device comprises a parameter acquisition module, a synchronization signal block selection module and a synchronization signal block synchronization module, wherein the parameter acquisition module is used for acquiring a first parameter of network configuration;
the increment adjusting module is used for carrying out increment adjustment on the first parameter to obtain a second parameter;
a synchronization signal block selection module, configured to select a corresponding synchronization signal block according to the second parameter, where each synchronization signal block is associated with a corresponding random access channel resource;
an initial access module, configured to send a random access preamble to the base station by using the associated random access channel resource for initial access.
An embodiment of the present invention further provides a mobile terminal, which includes a processor and a memory, where the memory stores a computer program, and the processor is configured to execute the computer program to implement the initial access method described above.
An embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed, the computer program implements the initial access method.
The embodiment of the invention has the following advantages:
the initial access method provided by the embodiment of the invention realizes the triggering of early beam measurement on random access information resources by performing incremental adjustment on random access parameters for selecting a synchronous signal block, and further is used for selecting an optimal beam, and can also ensure that a mobile terminal can send a random access preamble under a good communication condition, thereby improving the initial access success rate between the mobile terminal and a base station and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 illustrates a schematic structural diagram of a mobile terminal according to an embodiment of the present invention;
fig. 2 shows a first flowchart of an initial access method according to an embodiment of the present invention;
fig. 3 shows a first flow diagram of incremental value acquisition of the initial access method according to the embodiment of the present invention;
fig. 4 shows a second flow diagram of increment value acquisition of the initial access method according to the embodiment of the present invention;
fig. 5(a) -5 (c) are graphs comparing test results of an initial access method of an embodiment of the present invention;
FIG. 6 shows a second flow diagram of an initial access method of an embodiment of the present invention;
fig. 7 is a schematic structural flow diagram of an initial access apparatus according to an embodiment of the present invention.
Description of the main element symbols:
100-mobile phone; 110-RF circuitry; 120-a memory; 130-an input unit; 140-a display unit; 150-a photographing unit; 160-an audio circuit; 170-a WiFi module; 180-a processor; 190-a power supply;
200-initial access means; 210-a parameter acquisition module; 220-an incremental adjustment module; 230-a synchronization signal block selection module; 240-initial access module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The components of embodiments of the present invention described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The following embodiments can be applied to a mobile terminal shown in fig. 1, such as a mobile phone, fig. 1 shows a block diagram of the mobile phone, and the mobile phone 100 includes: an RF (Radio Frequency) circuit 110, a memory 120, an input unit 130, a display unit 140, a photographing unit 150, an audio circuit 160, a WiFi (wireless fidelity) module 170, a processor 180, and a power supply 190. Among other things, the RF circuitry 110 may be used to receive and transmit wireless signals, etc.; the memory 120 can be used for storing applications and user-related file information required for the operation of the mobile phone 100. The input unit 130 may include keys, a touch panel, and may also include other input devices, etc. for receiving information input from a user, etc.; the display unit 140 may include a display panel mainly for displaying information such as images and characters; the shooting unit 150 mainly includes front and rear cameras and the like, and is mainly used for shooting pictures, videos and the like; the audio circuit 160 is connected to sound output devices such as a receiver and a speaker and sound input devices such as a microphone, and can be used for recording or playing voice and the like; the WiFi module 170 may be used to transmit and receive WiFi signals to achieve information transmission, etc. The processor 180 is used as a control center of the mobile phone 100, and is mainly used for enabling other units or modules to execute corresponding functions and the like; and the power supply 190 mainly includes a battery device for supplying a required operating voltage and the like to each module or unit in the cellular phone 100.
Those skilled in the art will appreciate that the configuration of the handset 100 shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. The technical solution of the present invention is described below by taking a mobile terminal as an example, wherein the mobile terminal is not limited to be applied to a mobile phone, and can also be applied to a tablet computer and the like. The present invention will be described below with reference to specific examples, but the present invention is not limited to these specific examples.
The initial access method of the embodiment of the invention is applied to mobile terminals, such as mobile phones, tablet computers with communication functions and the like. The mobile terminal is also called User Equipment (UE), and the UE can support at least two network systems, including a 5G network system. The invention provides a method for triggering user equipment to perform beam measurement as early as possible and improving the success rate of initial access and the like based on the initial access process of 5G.
In a 5G new air interface (NR), a base station generally employs a large-scale antenna array (massive MIMO), and in order to solve the problems of high fading, high loss, and the like in a wireless channel in a 5G millimeter wave band, it is proposed to use a Beamforming (Beamforming) technology to obtain a narrower beam with higher gain to perform wireless communication. The beam forming is to transmit by focusing beam energy in a certain direction by using a weighting factor.
Example 1
Fig. 2 is a flowchart illustrating an initial access method according to an embodiment of the present invention.
Step S11, obtaining a first parameter of the network configuration, where the first parameter is used to select a synchronization signal block.
The Initial Access (Initial Access) process refers to a process for establishing an Initial link connection between a user and a base station, and includes two stages, a cell search stage and a random Access stage. Typically, after being powered on, the user equipment needs to search for an available wireless network and establish a connection with the wireless network. When the user equipment selects a proper cell for residence, initial access can be initiated to the system.
The initial access process affects Uplink synchronization, Physical Uplink Shared Channel (PUSCH) resource allocation, and the like. The user equipment can perform uplink synchronization, uplink data transmission and the like only after the random access is successful. The initial random access is a contention-based access procedure and is initiated by the MAC layer of the user equipment.
For step S11, exemplarily, before initiating the initial access, the ue needs to acquire a first parameter configured by the network side first, and select a corresponding synchronization signal block according to the first parameter.
The Synchronization Signal Block (SSB) is composed of a Synchronization Signal PSS, a secondary Synchronization Signal SSS, and a physical downlink channel PBCH. In the 5G new air interface (NR), it is proposed to use beamforming technology for wireless communication. In the 5G NR random access procedure, each SSB represents a directional beam (beam), and different SSB beams are associated with corresponding random access preamble resources, and the network side typically implements association between synchronization signal blocks and random access channel resources through higher layer parameter configuration in a cell level common message body (RACH-ConfigCommon) to enable the ue to select an optimal beam. Wherein, the optimal beam means that the quality of the reference signal of the beam is the best.
When the user equipment selects a corresponding SSB, a random access Preamble (Preamble) may be transmitted through a random access Preamble resource associated with the SSB. Thus, the network side can make explicit the position of random access initiation to determine which user equipment initiated random access.
In some embodiments, the first parameter may be RSRP-threshold SSB, which serves as a Reference Signal Received Power (RSRP) threshold for selecting the synchronization signal block SSB, for example. Of course, in some other embodiments, the first parameter may also be rsrp-threshold SSB-SUL, etc.
And step S12, performing incremental adjustment on the first parameter to obtain a second parameter.
In step S12, the second parameter is an adjusted value, which is obtained by adding an increment value Δ to the first parameter. It will be appreciated that the second parameter is of the same type of parameter as the first parameter. For example, taking the rsrp-threshold ssb as an example, the second parameter is an adjustment value obtained by incrementally adjusting the rsrp-threshold ssb.
It can be understood that the first parameter is adjusted, and the adjusted second parameter is used as a corresponding condition threshold value for triggering beam measurement, so that the purpose of triggering beam measurement as early as possible can be achieved.
Prior to step S12, the method further comprises: an increment value for the increment adjustment is acquired.
In an alternative embodiment, the increment value is a value preset by the terminal manufacturer, for example, the increment value Δ is 2, 4, 6 or 8, and the like, and may be set according to actual requirements. Exemplarily, the increment value can be in a range of 2 to 10.
In another alternative embodiment, as shown in fig. 3, the obtaining of the increment value includes:
step S210, obtaining the current moving speed of the mobile terminal.
In consideration of the fact that the moving speed of the device may affect the effective communication performance of the terminal, the corresponding incremental value may be selected according to the current moving speed after the moving speed of the mobile terminal is obtained.
And step S220, determining the current moving speed grade according to the moving speed.
Exemplarily, the mobile terminal may be prestored with several divided moving speed levels, wherein different moving speed levels correspond to different adjustment suggestion values. For example, the device may be divided into three levels, i.e., a high level, a medium level and a low level, where the range of the moving speed of the device corresponding to each level is different, and the moving speed may be specifically divided according to actual tests. The suggested adjustment value can also be set reasonably according to the actual test result, and is not limited specifically herein.
In step S220, it is determined which moving speed level the current moving speed belongs to, based on the range value of the moving speed corresponding to each moving speed level. For example, if the mobile terminal includes three moving speed levels, the moving speed range division corresponding to each moving speed level can be as shown in table 1.
TABLE 1
Grade of speed of movement Range of speed of movement Adjusting suggested values
Height of x 1 ～x 2 Δ 1
In (1) x 3 ～x 4 Δ 2
Is low in x 5 ～x 6 Δ 3
If the obtained current moving speed is X, the size of X can be judged in which moving speed range, and the X is supposed to be in X 3 ～x 4 If so, the mobile terminal can judge the mobile terminal to be at the middle mobile speed level.
Step S230, determining a target adjustment suggested value according to the current moving speed class to which the target adjustment suggested value belongs, and using the target adjustment suggested value as the increment value.
For example, a target adjustment recommendation value may be determined according to a correspondence between the moving speed level and the adjustment recommendation value, and used as the increment value. For example, after determining the moving speed level as the middle moving speed level, the increment value may be determined as Δ 2 。
In another alternative embodiment, as shown in fig. 4, the obtaining of the increment value includes:
step S310, the signal quality of the cell where the base station is located is obtained.
Step S320, determining whether the signal quality of the cell matches the signal quality of the cell stored in the mobile terminal.
Generally, the user equipment stores information of the resident cell, such as signal quality, cell identification, and frequency point, etc. For example, when the random access based on the first parameter configured by the network is successful, the ue may store the corresponding cell identifier, signal strength, and first parameter in association, so as to perform learning and predict to output a subsequent incremental value.
Exemplarily, after the ue resides in the current cell, the identifier of the current cell, the signal quality of the cell, and the like may be obtained, and then, whether the ue stores the cell with the same identifier is queried, if so, it is further determined whether the signal qualities of the two are the same or relatively close (that is, the difference between the two is within the receiving range), if so, it is determined that the two are matched, and step S330 is executed.
Step S330, when there is a matched cell, the increment value is predicted and output according to the historical increment value corresponding to the matched cell.
Exemplarily, if there is a cell in the stored cell list that has the same identifier and signal quality as the current cell, the corresponding stored historical increment value may be directly used as the current increment value. Optionally, if there is no cell with the same identifier or is not the same or close, the first parameter may be heuristically adjusted according to a default incremental value.
The historical increment value corresponding to the cell is usually an adjustment value related to the first parameter corresponding to successful random access. For example, for a serving cell, when random access is successful, information corresponding to the serving cell and a corresponding incremental value (if 2) are recorded, and then, if the serving cell is detected again, 2 is directly output as a preferred incremental value, so that it can be understood that learning and prediction are performed by using historical data, thereby improving time saving of tentative adjustment and the like.
Step S13, selecting a corresponding synchronization signal block according to the second parameter, wherein each synchronization signal block is associated with a corresponding random access channel resource.
The Random Access Channel resources include a PRACH (Physical Random Access Channel), a RAPID, and the like. Wherein, the PRACH channel is a time frequency resource of the random access preamble; RAPID is a code resource of a random access preamble.
Still taking the rsrp-threshold ssb as an example, the second parameter is an adjusted value of the rsrp-threshold ssb. Exemplarily, selecting the corresponding synchronization signal block according to the second parameter comprises: judging whether SS-RSRP of at least one synchronous signal block is higher than the adjusting value or not, if so, selecting one of the synchronous signal blocks with SS-RSRP higher than the adjusting value; otherwise, a sync signal block is selected arbitrarily.
Step S14, sending a random access preamble to the base station for initial access by using the associated random access channel resource.
Wherein the at least one synchronization signal block SSB is transmitted by the base station. Typically, N SSBs are associated with one PRACH opportunity (frequency domain), and each SSB has a corresponding number of contention-based random access preambles on each valid PRACH opportunity (frequency domain).
The random access Preamble (Preamble) belongs to a part of the random access signal, and is a pulse, and in the time domain, the pulse comprises a cyclic prefix, a Preamble sequence time length and a section of vacancy; in the frequency domain, 6 resource blocks. Wherein, Preamble is also message 1(MSG 1). Generally, the user equipment can only send the Preamble at the corresponding PRACH opportunity, and when the base station successfully receives the Preamble sent by the user equipment, the corresponding SSB beam can be determined, and then information is sent to the user equipment at the corresponding location, so as to perform the subsequent random access process, and finally complete the initial access.
In some embodiments, if a serving cell in which the base station is located is configured with a Supplemental Uplink (SUL), the first parameter at this time may also be rsrp-threshold ssb-SUL, where the rsrp-threshold ssb-SUL is used to select a supplemental uplink carrier (SUL carrier). By incrementally adjusting the rsrp-threshold SSB-SUL; and judging whether to select a supplementary uplink carrier according to the adjusted rsrp-threshold SSB-SUL. Wherein the supplemental uplink carrier is used for uplink transmission.
Taking the test of an actual edge area where random access failure often occurs as an example, the rsrp-threshold ssb configured on the network side is 50, converted into a power value of (50-156 ═ 106dBm), and used for sending the random access preamble. Fig. 5(a) and 5(b) show two cases of random access failure in which random access preamble transmission fails and reception of a returned random access response (i.e., MSG2) fails, respectively. After the increment value 4 is adopted, the rsrp-threshold ssb is adjusted to obtain a power value of (50+4-156 ═ 102dBm), as shown in fig. 5(c), at this time, the random access preamble is successfully transmitted, and the random access response can be normally received, that is, the initial access is successfully received.
It can be understood that the threshold value for triggering the beam measurement is modified by adjusting the related parameters of the synchronization signal block, so that not only the beam measurement can be triggered as early as possible, but also the success rate of random access can be improved when the random access preamble is transmitted by using the power corresponding to the adjusted value compared with the power corresponding to the original threshold value.
In addition, in some embodiments, the above-mentioned manner of adjusting the random access parameter increment may also be applied to other random access scenarios, such as beam failure recovery. Exemplarily, as shown in fig. 6, the method further includes:
in step S15, it is detected whether a beam failure occurs.
Step S16, when it is detected that the beam failure occurs, acquiring a third parameter, and performing incremental adjustment on the third parameter to obtain a fourth parameter.
Step S17, selecting a new synchronization signal block according to the fourth parameter, where the new synchronization signal block is associated with a corresponding random access channel resource.
Step S18, sending a random access preamble to the base station by using the random access channel resource for beam failure recovery.
Exemplarily, when the mobile terminal channel is bad, a beam failure indication will be obtained from the lower layer and a new SSB will be selected to request recovery, which will trigger the random access procedure to be completed. Wherein the third parameter is an rsrp-threshold csi-SSB parameter in the beam failure configuration information (BeamFailureRecoveryConfig), and the rsrp-threshold si-SSB parameter is also used for selecting the synchronization signal block. It is noted that the synchronization signal block at this time should be selected from the beam candidate list, i.e. not the same SSB as has been selected before. Step S180 and step S190 are similar to step S130 and step S140 described above and will not be described in detail here.
The initial access method provided by the embodiment of the invention can realize the triggering of early beam measurement on random access information resources by performing incremental adjustment on the random access parameters for selecting the synchronous signal blocks, and can also ensure that the mobile terminal can send random access preambles under good communication conditions, thereby improving the initial access success rate between the mobile terminal and the base station, the random access success rate during beam failure recovery and the like.
Example 2
Fig. 7 is a schematic structural diagram of an initial access apparatus according to an embodiment of the present invention.
Exemplarily, the initial access apparatus 200 includes:
a parameter obtaining module 210, configured to obtain a first parameter of a network configuration, where the first parameter is used to select a synchronization signal block;
an increment adjustment module 220, configured to perform increment adjustment on the first parameter to obtain a second parameter;
a synchronization signal block selection module 230, configured to select a corresponding synchronization signal block according to the second parameter, where each synchronization signal block is associated with a corresponding random access channel resource;
an initial access module 240, configured to send a random access preamble to the base station for initial access by using the associated random access channel resource.
It is to be understood that the initial access apparatus 200 described above corresponds to the initial access method of embodiment 1. The options in embodiment 1 are also applicable to this embodiment, and are not described in detail here.
The invention also provides a mobile terminal which can comprise a smart phone, a tablet computer and the like. The mobile terminal is preferably a smart phone or a tablet computer. The mobile terminal comprises a memory and a processor, wherein the memory stores a computer program, and the processor enables the mobile terminal to execute the functions of each module in the initial access method or the initial access device by running the computer program.
The memory may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The present invention also provides a computer-readable storage medium for storing the computer program used in the above-mentioned mobile terminal.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, each functional module or unit in each embodiment of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention or a part of the technical solution that contributes to the prior art in essence can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims (14)

1. An initial access method, applied to a mobile terminal, the method comprising:
acquiring a first parameter of network configuration, wherein the first parameter is used for selecting a synchronous signal block;
obtaining an increment value for adjustment, and performing increment adjustment on the first parameter to obtain a second parameter; the obtaining of the increment value comprises: acquiring the current moving speed of the mobile terminal; determining a current moving speed grade according to the moving speed, wherein the mobile terminal is provided with a plurality of moving speed grades, and different moving speed grades correspond to different adjustment suggested values; determining a target adjustment suggestion value according to the current movement speed grade; taking the target adjustment recommendation value as the delta value;
selecting a corresponding synchronization signal block according to the second parameter, wherein each synchronization signal block is associated with a corresponding random access channel resource;
and sending a random access preamble to a base station by utilizing the associated random access channel resource for initial access.
2. The initial access method according to claim 1, wherein the first parameter is rsrp-threshold ssb, and the second parameter is an adjustment value obtained by performing incremental adjustment on the rsrp-threshold ssb; the selecting the corresponding synchronization signal block according to the second parameter comprises:
determining whether there is at least one synchronization signal block with a SS-RSRP higher than the adjustment value, wherein the at least one synchronization signal block is transmitted by the base station;
if the SS-RSRP is higher than the adjustment value, selecting one of the synchronous signal blocks with the SS-RSRP higher than the adjustment value; otherwise, a sync signal block is selected arbitrarily.
3. The initial access method according to claim 1, wherein the increment value is in a range of 2-10.
4. The initial access method according to claim 1 or 2, further comprising:
detecting whether a beam failure occurs;
when the beam failure is detected, acquiring a third parameter, and performing incremental adjustment on the third parameter to obtain a fourth parameter;
selecting a corresponding synchronization signal block according to the fourth parameter, wherein the corresponding synchronization signal block is associated with a corresponding random access channel resource;
and sending a random access preamble to the base station by using the associated random access channel resource to perform beam failure recovery.
5. The initial access method of claim 2, wherein the first parameter is rsrp-threshold ssb-SUL if the cell in which the base station is located is configured with a supplemental uplink.
6. An initial access method, applied to a mobile terminal, the method comprising:
acquiring a first parameter of network configuration, wherein the first parameter is used for selecting a synchronous signal block;
obtaining an increment value for adjustment, and performing increment adjustment on the first parameter to obtain a second parameter; the obtaining of the increment value comprises: acquiring the signal quality of a cell in which a base station is positioned; judging whether the signal quality of the cell is matched with the signal quality of a cell stored in the mobile terminal, wherein the stored cell is corresponding to a historical increment value; when a matched cell exists, taking a historical increment value corresponding to the matched cell as the increment value;
selecting a corresponding synchronization signal block according to the second parameter, wherein each synchronization signal block is associated with a corresponding random access channel resource;
and sending a random access preamble to a base station by utilizing the associated random access channel resource for initial access.
7. The initial access method according to claim 6, wherein the first parameter is rsrp-threshold ssb, and the second parameter is an adjustment value obtained by incrementally adjusting the rsrp-threshold ssb; the selecting the corresponding synchronization signal block according to the second parameter comprises:
determining whether there is at least one synchronization signal block with a SS-RSRP higher than the adjustment value, wherein the at least one synchronization signal block is transmitted by the base station;
if the SS-RSRP is higher than the adjustment value, selecting one of the synchronous signal blocks with the SS-RSRP higher than the adjustment value; otherwise, a sync signal block is selected arbitrarily.
8. The initial access method according to claim 6, wherein the increment value is in a range of 2-10.
9. The initial access method according to claim 6 or 7, further comprising:
detecting whether a beam failure occurs;
when the beam failure is detected, acquiring a third parameter, and performing incremental adjustment on the third parameter to obtain a fourth parameter;
selecting a corresponding synchronization signal block according to the fourth parameter, wherein the corresponding synchronization signal block is associated with a corresponding random access channel resource;
and sending a random access preamble to the base station by using the associated random access channel resource to perform beam failure recovery.
10. The initial access method of claim 7, wherein the first parameter is rsrp-threshold ssb-SUL if the cell in which the base station is located is configured with a supplemental uplink.
11. An initial access apparatus, applied to a mobile terminal, the apparatus comprising:
the device comprises a parameter acquisition module, a synchronization signal block selection module and a synchronization signal block synchronization module, wherein the parameter acquisition module is used for acquiring a first parameter of network configuration;
the increment adjusting module is used for acquiring an increment value for adjustment, and performing increment adjustment on the first parameter to obtain a second parameter; acquiring the current moving speed of the mobile terminal; determining a current moving speed grade according to the moving speed, wherein the mobile terminal is provided with a plurality of moving speed grades, and different moving speed grades correspond to different adjustment suggested values; determining a target adjustment suggestion value according to the current movement speed grade; taking the target adjustment recommendation value as the delta value;
a synchronization signal block selection module, configured to select a corresponding synchronization signal block according to the second parameter, where each synchronization signal block is associated with a corresponding random access channel resource;
an initial access module, configured to send a random access preamble to the base station by using the associated random access channel resource for initial access.
12. An initial access apparatus, applied to a mobile terminal, the apparatus comprising:
the device comprises a parameter acquisition module, a synchronization signal block selection module and a synchronization signal block synchronization module, wherein the parameter acquisition module is used for acquiring a first parameter of network configuration;
the increment adjusting module is used for acquiring an increment value for adjustment, and performing increment adjustment on the first parameter to obtain a second parameter; the obtaining of the increment value comprises: acquiring the signal quality of a cell in which a base station is positioned; judging whether the signal quality of the cell is matched with the signal quality of a cell stored in the mobile terminal, wherein the stored cell is corresponding to a historical increment value; when a matched cell exists, taking a historical increment value corresponding to the matched cell as the increment value;
a synchronization signal block selection module, configured to select a corresponding synchronization signal block according to the second parameter, where each synchronization signal block is associated with a corresponding random access channel resource;
an initial access module, configured to send a random access preamble to the base station by using the associated random access channel resource for initial access.
13. A mobile terminal, characterized in that the mobile terminal comprises a processor and a memory, the memory storing a computer program for executing the computer program for implementing the initial access method according to any of claims 1-10.
14. A computer-readable storage medium, characterized in that it stores a computer program which, when executed, implements an initial access method according to any one of claims 1-10.
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