CN112203357A - Random access method, device, storage medium and electronic equipment - Google Patents
Random access method, device, storage medium and electronic equipment Download PDFInfo
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- CN112203357A CN112203357A CN202011062997.5A CN202011062997A CN112203357A CN 112203357 A CN112203357 A CN 112203357A CN 202011062997 A CN202011062997 A CN 202011062997A CN 112203357 A CN112203357 A CN 112203357A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
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- 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
Abstract
The embodiment of the invention provides a random access method, a random access device, a storage medium and electronic equipment, wherein the method comprises the following steps: performing target processing on pre-acquired target pilot information to determine target element values contained in the target pilot information; under the condition that the target element value of the target pilot information is determined to meet the target condition, adjusting a target channel for sending a target response message of the target pilot information; and sending the target response information by utilizing the adjusted target channel. The invention solves the problem of low success rate of signal access caused by poor demodulation performance of MSG2 in the related technology, thereby achieving the effect of improving the signal access rate.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to a random access method, a random access device, a storage medium and electronic equipment.
Background
The random access process is the basis of a wireless communication protocol and provides necessary conditions for providing network connection and service operation for the terminal; the performance of the random access process directly affects the perception of the user, and thus, the performance of the random access process is also an important index concerned by each operator. Currently, the 3GPP protocol specifies the basic protocol flow of the random access procedure
In the random access process, due to the complex downlink channel wireless environment, under the condition that the channel condition is poor due to downlink interference or other factors, if the MSG2 detection of the terminal side performing wireless communication to the random access process fails, the access needs to be reinitiated through MSG1 retransmission, and this way does not improve the demodulation performance of MSG2, so there is no substantial improvement on the signal access success rate.
However, no related technical solution can solve the above problems.
Disclosure of Invention
Embodiments of the present invention provide a random access method, apparatus, storage medium, and electronic device, so as to at least solve the problem in the related art that a signal access success rate is low due to poor demodulation performance of MSG 2.
According to an embodiment of the present invention, there is provided a random access method including:
performing target processing on pre-acquired target pilot information to determine target element values contained in the target pilot information;
under the condition that the target element value of the target pilot information is determined to meet the target condition, adjusting a target channel for sending a target response message of the target pilot information;
and sending the target response information by utilizing the adjusted target channel.
In one exemplary embodiment, before performing target processing on the pre-acquired target pilot information to determine a target element value contained in the target pilot information, the method further comprises:
acquiring historical pilot information; sequentially storing the historical pilot information into a storage queue of a first array list through a data window according to a preset rule;
the performing target processing on the pre-acquired pilot information to determine a target element value contained in the pilot information includes:
under the condition that the data storage quantity of the first array list is determined to meet the storage condition, sequentially comparing the target pilot information with historical pilot information received at a target moment and stored in the first array list, wherein the target pilot information is pilot information which is received after the historical pilot information is received and needs to be stored;
storing the target pilot information in a target area when determining that first historical pilot information with a first element value identical to that of the target pilot information exists in the historical pilot information received at the target time based on the comparison result;
and acquiring a second element value of the stored target pilot information, and determining the target element value of the target pilot information based on the second element value.
In one exemplary embodiment, obtaining the stored second element value of the target leading information, and determining the target element value of the target leading information based on the second element value comprises:
detecting the second element value of the stored target pilot information;
under the condition that the second element value is a threshold value, judging whether a third element value and a fourth element value of the target pilot information meet a first target condition;
and adding 1 to a fifth element value of the target pilot information as the target element value when the third element value and the fourth element value of the target pilot information satisfy the first target condition.
In an exemplary embodiment, after detecting the second element value of the stored target leading information, the method further includes:
judging whether the third element and the fourth element of the target pilot information meet a second target condition or not under the condition that the second element value is 0, and adding 1 to the second element value of the target pilot information under the condition that the third element and the fourth element of the target pilot information are determined to meet the second target condition;
under the condition that the second element value is a numerical value between 0 and a threshold value, judging whether the third element value and the fourth element value of the target pilot information meet a second target condition; adding 1 to the second element value of the target preamble in case the third and fourth element values of the target preamble satisfy a second target condition.
In one exemplary embodiment, adjusting a channel for transmitting a target response message for the target preamble information includes at least one of:
promoting the aggregation level value of the target channel;
reducing a modulation coding index value of the target channel;
and increasing the signal transmission power of the target channel.
In an exemplary embodiment, sequentially storing the historical pilot information into a storage queue of a first array list through a data window according to a preset rule includes:
sequencing the historical pilot information according to the sequence of the information quantity of the historical pilot information obtained at the same time from small to large;
acquiring a specified amount of target historical pilot information according to a sorting sequence;
and storing the target historical pilot information into a storage queue of the first array list at the corresponding moment.
In one exemplary embodiment, after storing the target pilot information in the target zone, the method includes:
slipping the data window according to the time sequence to remove a storage area of the historical pilot information corresponding to the first time included in the first array list from the first array list, and determining the storage area of the historical pilot information corresponding to the remaining time included in the first array list and a storage area of the target pilot information at the target time as a second array list;
clearing the information in the removed storage area to obtain a free storage area;
and sequentially storing the pilot information acquired after the target time into the idle storage area.
In one exemplary embodiment of the present invention,
before the historical pilot information is sequentially stored in a storage queue of a first array list through a data window according to a preset rule, the method comprises the following steps:
determining the first array list by taking the time sequence as a horizontal axis and taking equipment for sending target pilot information as a vertical axis;
the sequentially comparing the target pilot information with the historical pilot information received at the target time stored in the first array list when it is determined that the data storage amount of the first array list satisfies a storage condition includes:
and sequentially comparing the target pilot information with historical pilot information received at the target moment and stored in the first array list one by one along the longitudinal axis.
According to another embodiment of the present invention, there is provided a random access apparatus including:
the target processing module is used for carrying out target processing on pre-acquired target pilot information so as to determine a target element value contained in the target pilot information;
a channel adjusting module, configured to adjust a target channel used for sending a target response message of the target pilot information when it is determined that a target element value of the target pilot information meets a target condition;
and the information sending module is used for sending the target response information by using the adjusted target channel.
According to a further embodiment of the present invention, there is also provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
By the invention, the signal transmission strategy of the MSG2 target channel is adjusted according to the element value in the transmitted MSG1, so the problem of low success rate of signal access can be solved, and the effect of improving the signal access rate is achieved.
Drawings
Fig. 1 is a block diagram of a hardware structure of a mobile terminal of a random access method according to an embodiment of the present invention;
fig. 2 is a flow chart of a random access method according to an embodiment of the present invention;
fig. 3 is a block diagram of a random access apparatus according to an embodiment of the present invention;
FIG. 4 is a flow chart of a specific embodiment of an embodiment of the present invention;
FIG. 5 is a partial flow diagram of one embodiment of the present invention;
figure 6 is a two dimensional array list diagram in one embodiment of the invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The method embodiments provided in the embodiments of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the operation on the mobile terminal as an example, fig. 1 is a hardware structure block diagram of the mobile terminal of a random access method according to an embodiment of the present invention. As shown in fig. 1, the mobile terminal may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data, wherein the mobile terminal may further include a transmission device 106 for communication functions and an input-output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program and a module of an application software, such as a computer program corresponding to a random access method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In this embodiment, a random access method is provided, and fig. 2 is a flowchart according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, carrying out target processing on the pre-acquired target pilot information to determine a target element value contained in the target pilot information;
in this embodiment, the base station receives a large amount of information from the terminal at the same time, so that it becomes an important step of information processing to filter out the target pilot information from the terminal and process the target pilot information so as to facilitate the base station to perform corresponding operations according to the processing result.
Taking 3GPP standard protocol as an example, after receiving a scheduling instruction initiated by a base station, a terminal initiates a non-contention Random Access procedure using a target pilot parameter carried by a base station configuration, or initiates a contention Random Access procedure alone, and sends coded target pilot information to the base station (i.e., MSG1) through a target channel, after receiving the target pilot information sent by the terminal, the base station responds to generate group packet information (Random Access response, also called RAR or MSG2)) according to the detected target pilot information, a measured value of the target pilot information, and a resource allocation status, and invokes a PDCCH scrambled by an RA-rnti (Random Access rnti), and sends MSG2 to the terminal through PDSCH bearer.
After receiving the target pilot information, the base station stores the target information according to a preset format, the stored format may be multiple, and in order to facilitate processing of the target information and save storage space, a part of the target pilot information may be extracted from the target pilot information and may be used as an identified element to be stored and identified, for example (but not limited to) extract index information preambelndex carried in MSG1, base station side detection information ta _ preambepwower, and terminal side retransmission behavior information, and store the information according to the following structure:
typedef struct：
{
UInt8 preambleIndex；
UInt8 tavalue；
SInt16 preamblepower；
UInt8 ra_preamble_count；
UInt8 flag；
}
in the formula, ra _ preamble _ count represents the number of repetitions of detecting a received target pilot value, flag represents whether to trigger a new scheduling mechanism for adjusting a target channel, and when storing the element value, the element value is assigned to "ff" or "0" in advance, thereby preventing the element value from being misjudged when processing.
Step S204, under the condition that the target element value of the target pilot information is determined to meet the target condition, adjusting a target channel for sending a target response message of the target pilot information;
in this embodiment, after determining the target element value of the target pilot information, the target element value of the target pilot information may (but is not limited to) be compared with the target condition, so as to determine whether the target element value of the target pilot information meets the target condition; and then determining a subsequent execution mode according to the comparison result.
The comparison process may be to compare the target element values with the target conditions in sequence, or to determine the size of the target element values after obtaining the target element values, or to compare the target element values in other manners.
For example, if a certain element value (e.g., a flag value) does not meet the target condition, it is determined that the target channel fails and the channel needs to be adjusted; or a certain element value meets the target condition, the target channel is determined to be normal, and then normal information response operation is continuously executed, or corresponding operation is carried out on other element values (such as ra _ preamble _ count) so as to conveniently identify subsequent information.
Adjusting the target channel includes, but is not limited to, adjusting the signal generation power of the target channel, adjusting the MCS value (Modulation and Coding Scheme), adjusting the aggregation level value, and so on.
The target response message of the target pilot information may (but is not limited to) include feedback information in response to the target pilot information and may also include other channel information.
And step S206, transmitting the target response information by using the adjusted target channel.
Through the steps, after receiving the MSG1, the detection and comparison are carried out according to the element values in the MSG1, and the channel for sending the MSG2 is positively allocated according to the detection and comparison result, so that the problem of low success rate of signal access caused by poor demodulation performance of the MSG2 is solved, and the success rate of signal random access is improved.
The main body of the above steps may be a base station, a terminal, etc., but is not limited thereto.
In an optional embodiment, before performing target processing on the pre-acquired target pilot information to determine a target element value contained in the target pilot information, the method further comprises:
step S2002, acquiring historical pilot information; sequentially storing the historical pilot information into a storage queue of a first array list through a data window according to a preset rule;
in the embodiment, before comparing the target pilot information, historical pilot information is acquired and stored in a storage queue to serve as a comparison basis of the target pilot information; the historical pilot information is the pilot information received at the time before the target pilot information is acquired, and the storage mode may be sequentially stored in the storage area according to the sequence or the reverse sequence of the queue, may also be randomly stored in the storage area of the queue, may also be stored according to the corresponding relationship between the historical pilot information and the storage area of the queue, and may also be stored according to other modes, as long as the storage of the historical pilot information in the storage queue of the first array list is achieved.
The historical pilot information may be acquired by storing the target pilot information when the target pilot information is received from the terminal, so as to store the received target pilot information as the historical pilot information; the historical pilot information may be stored in the storage queue of the first array list in advance, or may be obtained by other means.
The data window may be a data filter capable of filtering the received pilot information, wherein the data filter may be a digital filter (such as an FIR digital filter) or other filters; the data window can also be a data port for executing data receiving, and the data port can be conducted and closed according to requirements, so that the sliding of the data window is realized; other data windows capable of defining the number of data receptions are also possible; the length of the data window can be adjusted according to requirements so as to adapt to different use environments.
The first array list may be configured in a manner that time for acquiring the target pilot information is a horizontal axis, and pilot information amount received from the terminal is a vertical axis, an intersection point of the horizontal axis and the vertical axis is information amount of pilot information transmitted to the base station by each terminal at a corresponding time, and a cell formed by intersection of the horizontal axis and the vertical axis is a storage area for storing historical pilot information; the information processing apparatus may be configured in other manners as long as the information processing apparatus can store the pilot information.
It should be noted that the size of the storage space of the storage queue in the first array list may be fixed, or may be changed according to the size of the received information amount, or may be the same in some regions, and different in some regions, so as to adapt to different use environments.
The target processing of the pre-acquired pilot information to determine a target element value contained in the pilot information includes:
step S2022, under the condition that the data storage amount of the first array list is determined to meet the storage condition, sequentially comparing the target pilot information with the historical pilot information received at the target moment stored in the first array list, wherein the target pilot information is the pilot information which is received after the historical pilot information is received and needs to be stored;
in this embodiment, when the storage queues of the first array list all reach the maximum storage amount, the target pilot information is compared with the historical pilot information in the first array list, so as to avoid an error response caused by directly storing the target pilot information into the first array list after receiving the target pilot information; for example, when the first array list does not reach the maximum storage amount, a gap may exist in the comparison process between the target pilot information and the historical pilot information, so that it is determined by mistake that the target pilot information is pilot information sent by a target channel in a normal state, and thus, the target channel is not adjusted, and further, the access of a signal fails.
The process of sequentially comparing the target preamble information with the historical preamble information received at the target time stored in the first array list may be to compare one element or one information in the target preamble information with the historical preamble information in the storage queue at a certain time in the corresponding first array list, or to compare one element or one information in the target preamble information with one of the historical preamble information in the storage queue at a certain time in the corresponding first array list, or to randomly compare one element or one information in the target preamble information with the historical preamble information in the storage queue at a certain time in the first array list, or randomly comparing the target pilot information with a certain historical pilot information in a corresponding queue in the first array list as long as the target pilot information can be compared; that is, one target preamble may be compared with a plurality of historical preambles sequentially, one target preamble may be compared with one historical preamble in a one-to-one manner or randomly in a one-to-one manner, and a plurality of target preambles may be compared with a part of the historical preambles or a single historical preamble, which is not described herein again.
Step S2024, if it is determined based on the comparison result that there is first historical leading information having the same first element value as the first element value of the target leading information in the historical leading information received at the target time, storing the target leading information in the target area;
in this embodiment, the target pilot information is stored only when the first element of the target pilot information satisfies the condition, so as to avoid that the target pilot information which does not satisfy the condition causes an erroneous comparison result on subsequently received target pilot information after being stored as the historical pilot information; the target area may be (including but not limited to) a storage area outside the first array list as long as the target pilot information can be stored.
Taking the first element as a preambeindex value as an example, when there is first historical leading information in the historical leading information, the preambeindex value of which is the same as the preambeindex value of the target leading information, the target leading information is stored, otherwise, the corresponding target leading information is not stored.
Step S2026, obtaining the second element value of the stored target pilot information, and determining the target element value of the target pilot information based on the second element value.
In this embodiment, after determining that the first element of the target pilot information satisfies the corresponding condition, the second element of the target pilot information is compared to avoid a situation that the first element does not satisfy the corresponding condition but the second element satisfies the corresponding requirement, so that an error rate when the target pilot information element at the next time is compared is reduced, and a success rate of signal access is improved.
Taking the second element value as the ra _ preamble _ count value as an example, when the ra _ preamble _ count value is the threshold value, executing a corresponding operation on the fifth element value, determining the fifth element value after the corresponding operation is completed as the target element value, and then adjusting the target channel according to the target element value.
In an optional embodiment, obtaining the second element value of the stored target leading information, and determining the target element value of the target leading information based on the second element value comprises:
step S20262, detecting a second element value of the stored target pilot information;
step S20264, in a case where the second element value is the threshold value, determining whether the third element value and the fourth element value of the target pilot information satisfy the first target condition;
in step S20266, if the third element value and the fourth element value of the target pilot information satisfy the first target condition, the fifth element value of the target pilot information is added by 1 to be the target element value.
In this embodiment, when the second element value is the threshold value, it is determined that the target channel has a fault, and it is determined whether adjustment is needed at this time, it is further necessary to determine the third element value and the fourth element value, so that excessive reaction caused by erroneous determination can be reduced, and energy loss can be further saved.
Taking the third element value as a value of tavalue, the fourth element value as a value of preambl, and the fifth element as a value of flag, when the second element value is a threshold value, determining whether the value of tavalue in the target pilot information is between intervals [ tavalue (0) × 2/3, tavalue (0) × 4/3], and determining whether the value of preambl is between intervals [ preambl-power step/3, preambl + power step/3], where power step is a value of a configuration parameter powerRampingStep of RACH, and tavalue (0) is a value of tavalue in history information corresponding to the target pilot information, and if the two conditions are satisfied at the same time, adding 1 to the value of flag, and taking the value of flag after adding 1 as the value of the target element.
In an optional embodiment, after detecting the value of the second element of the stored target pilot information, the method further comprises:
step S20268, when the second element value is 0, determining whether the third element and the fourth element of the target pilot information satisfy a second target condition, and adding 1 to the second element value of the target pilot information when it is determined that the third element and the fourth element of the target pilot information satisfy the second target condition;
step S202610, in a case where the second element value is a value between 0 and the threshold value, determining whether the third element value and the fourth element value of the target pilot information satisfy a second target condition; and adding 1 to the second element value of the target preamble information when the third element value and the fourth element value of the target preamble information satisfy the second target condition.
In this embodiment, when the second element value is 0 or a value between 0 and the threshold, it is determined that the target channel is in a normal state, and at this time, only a normal message response needs to be maintained, so that energy waste caused by continuously maintaining the adjusted target channel is avoided.
Take the third element value as the value of tavalue and the fourth element value as the value of preambleroller as an example.
When the ra _ preamble _ count value is 0, comparing whether the value (new) of the target preamble information is between the intervals [ value (0) × 2/3, value (0) × 4/3], and whether the preamble power (new) is between the intervals [ preamble power + powerstep 2/3, preamble power + powerstep 4/3], and when the above conditions are met, adding 1 to the ra _ preamble _ count value of the target preamble information;
when the ra _ preamble _ count value is a value between 0 and the threshold, it is determined whether a value (new) of the target preamble information is between a section [ value (0) × 2/3, value (0) × 4/3], and a preamble (new) is determined whether a value (new) of the target preamble information is between a section [ preamble-power step/3, preamble + power step/3], and if both of the above conditions are satisfied, the ra _ preamble _ count value of the target preamble information is incremented by 1.
In an alternative embodiment, adjusting the channel used for transmitting the target response message of the target preamble includes at least one of:
step S2062, the aggregation level value of the target channel is promoted;
step S2064, reducing the modulation coding index value of the target channel;
step S2066, increasing the signal transmission power of the target channel.
In this embodiment, in addition to the above adjustment method, other types of adjustment may be performed on the channel for transmitting the target response message of the target preamble information as long as the success rate of the random access of the signal can be improved.
In an optional embodiment, sequentially storing the historical leading information into a storage queue of the first array list through a data window according to a preset rule includes:
step S20022, sorting the historical pilot information according to the sequence of the information quantity of the historical pilot information obtained at the same time from small to large;
step S20024, obtaining a specified amount of target historical pilot information according to the sorting sequence;
and step S20026, storing the target historical pilot information into a storage queue of the first array list at the corresponding moment.
In this embodiment, after the historical pilot information sent by different terminals at the same time is obtained, the obtained historical pilot information is sorted according to the size of the terminal close to the base station and the historical pilot information with less interference information are screened out, so that the data processing amount is reduced, and the energy is saved.
Then, in order to reduce the influence of virtual inspection factors and access abnormity caused by other network factors, a specified amount of historical pilot information is selected from the sorted historical pilot information, and meanwhile, the energy consumption can be further reduced; for example, the first 20 are taken for subsequent processing while the unprocessed ones are discarded as false, wherein even real users can be accessed by the next opportunity.
And then sequentially storing the selected historical pilot information into a storage queue at a corresponding moment, for example, storing the selected historical pilot information into a first storage queue at a first moment of a first array list.
In an optional embodiment, after storing the target pilot information in the target zone, the method further comprises:
step S20242, sliding the data window in time sequence to remove the storage area of the historical leading information corresponding to the first time included in the first array list from the first array list, and determining the storage area of the historical leading information corresponding to the remaining time included in the first array list and the storage area of the target leading information at the target time as a second array list;
step S20244, clearing the information in the removed storage area to obtain a free storage area;
in step S20246, the pieces of pilot information acquired after the target time are sequentially stored in the free storage area.
In this embodiment, since the length of the data window is not changed, when the data window is slid along the time sequence, the storage queue located in the first array list and closest to the time start point is moved out of the first array list, and the storage queue storing the target pilot information at a new time is updated to the historical pilot information in the array list, and the information in the removed storage area is cleared to obtain a free storage area, so that a new storage location can be used for storing new pilot information.
After the sliding window action is finished, the storage area of the historical pilot information corresponding to the remaining time in the first array list and the storage area of the target pilot information at the target time are determined as a second array list, so that the real-time performance of the stored historical pilot information is ensured, and the misjudgment caused by low real-time performance is avoided.
Due to the limitation of the storage space, after sliding a specified number of times along the time sequence, the data window needs to be slid again to the initial position to store the data again.
In an optional embodiment, before the historical leading information is sequentially stored in the storage queue of the first array list through the data window according to a preset rule, the method includes:
step S2000, determining a first array list by taking the time sequence as a horizontal axis and taking the equipment for sending the target pilot information as a vertical axis;
when the data storage amount of the first array list is determined to meet the storage condition, sequentially comparing the target pilot information with the historical pilot information received at the target time and stored in the first array list comprises:
step S20222 compares the target preamble information with the historical preamble information received at the target time stored in the first array list one by one along the vertical axis.
In this embodiment, in the process of performing the comparison between the target pilot information and the historical pilot information, one target pilot information is first taken, the target pilot information is sequentially compared with the historical pilot information in the storage queue at the corresponding time, after the comparison with all the historical pilot information in the storage queue at the corresponding time is completed, the next target pilot information is taken out along the vertical axis direction, the newly taken target pilot information is sequentially compared with the historical pilot information in the storage queue at the corresponding time, and the above operations are repeated until all the target pilot information is compared.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a random access apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details are not described again after the description is given. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 3 is a block diagram of a random access apparatus according to an embodiment of the present invention, and as shown in fig. 3, the apparatus includes:
a target processing module 32, configured to perform target processing on pre-acquired target pilot information to determine a target element value included in the target pilot information;
a channel adjusting module 34, configured to adjust a target channel for sending a target response message of the target pilot information if it is determined that the target element value of the target pilot information meets the target condition;
and an information sending module 36, configured to send the target response information by using the adjusted target channel.
In an optional embodiment, the apparatus further comprises:
a history storage module 302, configured to obtain history pilot information; sequentially storing the historical pilot information into a storage queue of a first array list through a data window according to a preset rule;
the target processing module 32 includes:
an information comparing unit 322, configured to, in a case where it is determined that the data storage amount of the first array list satisfies the storage condition, sequentially compare target pilot information with historical pilot information received at a target time that is stored in the first array list, where the target pilot information is pilot information that needs to be stored and is received after the historical pilot information is received;
an information storage unit 324 that stores the target preamble information in the target area when it is determined that there is first historical preamble information having a first element value that is the same as the first element value of the target preamble information among the historical preamble information received at the target time based on the comparison result;
the target determining unit 326 obtains the second element value of the stored target pilot information, and determines the target element value of the target pilot information based on the second element value.
In an alternative embodiment, the target determination unit 326 comprises:
an element detection subunit 3262 configured to detect a second element value of the stored target preamble;
a first judging subunit 3264, when the second element value is the threshold value, judging whether the third element value and the fourth element value of the target pilot information satisfy the first target condition;
the element processing subunit 3266 adds 1 to the fifth element value of the target preamble information as the target element value when the third element value and the fourth element value of the target preamble information satisfy the first target condition.
In an optional embodiment, the target determination unit 326 further comprises:
a second determination subunit 3268, if the second element value is 0, determining whether the third element and the fourth element of the target preamble satisfy the second target condition, and if it is determined that the third element and the fourth element of the target preamble satisfy the second target condition, adding 1 to the second element value of the target preamble;
a third judging subunit 32610, in a case where the second element value is a value between 0 and the threshold, judging whether the third element value and the fourth element value of the target pilot information satisfy the second target condition; and adding 1 to the second element value of the target preamble information when the third element value and the fourth element value of the target preamble information satisfy the second target condition.
In an alternative embodiment, the information sending module 36 includes at least one of:
an aggregation level increasing unit 362 for increasing an aggregation level value of the target channel;
an index value reduction unit 364 for reducing a modulation coding index value of the target channel;
a power boosting unit 366, configured to boost the signal transmission power of the target channel.
In an alternative embodiment, the history storage module 302 includes:
the sorting unit 3022 is configured to sort the historical pilot information according to a descending order of the information amount of the historical pilot information acquired at the same time;
a history information acquisition unit 3024, configured to acquire a specified number of target history pilot information according to a sorting order;
a history storage unit 3026, configured to store the target historical leading information in a storage queue at a corresponding time in the first array list.
In an alternative embodiment, the information storage unit 324 includes:
a sliding window subunit 3242, sliding the data window in time sequence, so as to remove the storage area of the historical leading information corresponding to the first time included in the first array list from the first array list, and determine the storage area of the historical leading information corresponding to the remaining time included in the first array list and the storage area of the target leading information at the target time as a second array list;
a clear subunit 3244, which clears the information in the removed storage area to obtain a free storage area;
the target storage sub-3246 sequentially stores the pilot information acquired after the target time into the free storage area.
In an alternative embodiment, the history storage module 302 includes:
an array determining unit 3022 configured to determine the first array list with the time sequence as a horizontal axis and the device that transmits the target pilot information as a vertical axis;
the information comparing unit 322 includes:
a traversing unit 3224, configured to compare the target pilot information with the historical pilot information received at the target time stored in the first array list one by one along the vertical axis.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
The present invention will be described with reference to specific examples.
Referring to fig. 4 and 5, the preambleIndex value, the base station side detection information ta _ preambleroller value, and the terminal side retransmission behavior information included in the MSG1 are extracted first. The storage unit information data structure is designed according to the three kinds of information as follows:
where ra _ preamble _ count is the detection repetition number, and flag is an element value for triggering a new scheduling mechanism (corresponding to step S401 in fig. 4).
Then, a two-dimensional array list structure as shown in fig. 6 is generated, in which the vertical axis represents valid information values detected at each TTI time (transmission time interval) on the base station side, and each cell stores the aforementioned unit information structure. The horizontal axis represents a time list, each column represents a TTI time, the m value is one MSG2 (i.e., RAR) detection window length, and the last column is information detected at the latest arrival time (corresponding to step S402 in fig. 4).
Then, initial information screening is performed on preamble information detected every TTI (corresponding to step S403 in fig. 4 and step S501 in fig. 5); in order to reduce the influence of false detection factors and access abnormality caused by other network factors, the maximum value of the detection information quantity is limited, and the limitation rules can be sorted from small to large based on the TA measurement value, for example, the first 20 are taken for subsequent processing (unprocessed is discarded as false, and even if a real user can be accessed by the next opportunity).
And storing the initial screening value in a storage queue at a corresponding time through sliding window processing, wherein when the sliding window is not filled, the acquired historical pilot information is sequentially stored in a first array list according to the TTI time (corresponding to step S404 in fig. 4 and step S502 in fig. 5).
When the storage amount of the storage queue in the window length reaches the maximum value, the element values included in the target leader information detected at the new arrival time are sequentially traversed according to the detection user cycle (corresponding to steps S503 and S504 in fig. 5), that is, the element value information of the initial column (i.e., 0 column) in the sliding window is sequentially compared, whether the same preambeindex value exists is compared, and if the same, the target leader information is stored according to the initial column (corresponding to step S405 in fig. 4).
And then, according to different values of the element ra _ preamble _ count, processing the related element values in different modes based on different rules. (corresponding to step S406 in FIG. 4 and to step S505 in FIG. 5)
Rule 1:
and when the ra _ preamble _ count value is 0, processing is performed according to the rule 1.
Comparing whether the new arrival time tavalue (new) is between the intervals [ tavalue (0) × 2/3, tavalue (0) × 4/3], and judging whether preampllow (new) is between the intervals [ preampllow + powerstep 2/3, preampllow + powerstep 4/3 ].
Wherein powerstep is the value of the RACH configuration parameter powerRampingStep, and if the condition is satisfied at the same time, the new time ra _ preamble _ count value is added by 1.
Rule 2:
and when the ra _ preamble _ count values are 1 and 2, processing is performed according to the rule 2.
Comparing whether the new arrival time value (new) is in the interval [ value (0) × 2/3, value (0) × 4/3], judging whether the preampllower (new) is in the interval [ preampllower-power step/3, preampllower + power step/3], if the conditions are satisfied at the same time, adding 1 to the ra _ preampl _ count value of the new arrival time.
Rule 3:
when the ra _ preamble _ count value is greater than or equal to 3 (where 3 is a threshold value and can be appropriately adjusted according to the wireless environment), comparing whether the new arrival time value (new) is in the interval [ value (0) × 2/3, value (0) × 4/3], and judging whether preamble power (new) is in the interval [ preamble power-power step/3, preamble power + power step/3 ]. If the conditions are met, the storage unit information element flag meeting the conditions is set to 1.
Subsequently, after the comparison of the target leading information is completed, the column element in the queue index 0 is deleted, the sliding window is moved, at this time, the queue 1 column is updated to the 0 column of the new list, and the new time sequence is entered into the queue list structure (corresponding to step S406 in fig. 4).
Then, according to the extracted list information, the following policy determination processing procedure is performed during scheduling (corresponding to step S407 in fig. 4 and step S506 in fig. 5):
(1) before allocating MSG2 (namely RAR) resource information of a new access user, a base station side firstly queries a new enqueue element, whether an element value with the flag of 1 exists, and if the element value exists, the base station side considers that the terminal user has a RAR detection failure scene caused by downlink abnormity, and further processing is needed.
(2) When allocating PDCCH resources corresponding to MSG2, the base station side downlink scheduler may adjust and increase the transmission power of PDCCH allocated to MSG2 by increasing the aggregation level value and decreasing the MCS (while satisfying the QPSK modulation constraint).
(3) When the base station side downlink scheduler allocates the corresponding MSG2 service resource, the MCS value of the corresponding downlink service channel needs to be adjusted and reduced, and the sending power is increased, so that the robustness of RAR information at the scheduling time is improved, the receiving signal power and the signal-to-noise ratio of the terminal side are improved, the demodulation performance is improved, the purpose of improving the probability of corresponding detection is achieved, and the probability of successful access of the user is improved.
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
In an exemplary embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
In an exemplary embodiment, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details of this embodiment are not repeated herein.
It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented using a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and they may be implemented using program code executable by the computing devices, such that they may be stored in a memory device and executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into various integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A random access method, comprising:
performing target processing on pre-acquired target pilot information to determine target element values contained in the target pilot information;
under the condition that the target element value of the target pilot information is determined to meet the target condition, adjusting a target channel for sending a target response message of the target pilot information;
and sending the target response information by utilizing the adjusted target channel.
2. The method of claim 1,
before performing target processing on the pre-acquired target pilot information to determine a target element value contained in the target pilot information, the method further includes:
acquiring historical pilot information; sequentially storing the historical pilot information into a storage queue of a first array list through a data window according to a preset rule;
the performing target processing on the pre-acquired pilot information to determine a target element value contained in the pilot information includes:
under the condition that the data storage quantity of the first array list is determined to meet the storage condition, sequentially comparing the target pilot information with historical pilot information received at a target moment and stored in the first array list, wherein the target pilot information is pilot information which is received after the historical pilot information is received and needs to be stored;
storing the target pilot information in a target area when determining that first historical pilot information with a first element value identical to that of the target pilot information exists in the historical pilot information received at the target time based on the comparison result;
and acquiring a second element value of the stored target pilot information, and determining the target element value of the target pilot information based on the second element value.
3. The method of claim 2, wherein obtaining a stored second elemental value of the target precursor information, and determining the target elemental value of the target precursor information based on the second elemental value comprises:
detecting the second element value of the stored target pilot information;
under the condition that the second element value is a threshold value, judging whether a third element value and a fourth element value of the target pilot information meet a first target condition;
and adding 1 to a fifth element value of the target pilot information as the target element value when the third element value and the fourth element value of the target pilot information satisfy the first target condition.
4. The method of claim 3, wherein after detecting the second element value of the stored target leading information, the method further comprises:
judging whether the third element and the fourth element of the target pilot information meet a second target condition or not under the condition that the second element value is 0, and adding 1 to the second element value of the target pilot information under the condition that the third element and the fourth element of the target pilot information are determined to meet the second target condition;
under the condition that the second element value is a numerical value between 0 and a threshold value, judging whether the third element value and the fourth element value of the target pilot information meet a second target condition; adding 1 to the second element value of the target preamble in case the third and fourth element values of the target preamble satisfy a second target condition.
5. The method of claim 1, wherein adjusting a channel used for transmitting a target response message of the target preamble comprises at least one of:
promoting the aggregation level value of the target channel;
reducing a modulation coding index value of the target channel;
and increasing the signal transmission power of the target channel.
6. The method of claim 2, wherein sequentially storing the historical pilot information into a storage queue of a first array list through a data window according to a preset rule comprises:
sequencing the historical pilot information according to the sequence of the information quantity of the historical pilot information obtained at the same time from small to large;
acquiring a specified amount of target historical pilot information according to a sorting sequence;
and storing the target historical pilot information into a storage queue of the first array list at the corresponding moment.
7. The method of claim 2, wherein after storing the target pilot information in a target zone, the method comprises:
slipping the data window according to the time sequence to remove a storage area of the historical pilot information corresponding to the first time included in the first array list from the first array list, and determining the storage area of the historical pilot information corresponding to the remaining time included in the first array list and a storage area of the target pilot information at the target time as a second array list;
clearing the information in the removed storage area to obtain a free storage area;
and sequentially storing the pilot information acquired after the target time into the idle storage area.
8. The method according to claim 1, wherein before the historical pilot information is sequentially stored in the storage queue of the first array list through a data window according to a preset rule, the method comprises:
determining the first array list by taking the time sequence as a horizontal axis and taking equipment for sending target pilot information as a vertical axis;
the sequentially comparing the target pilot information with the historical pilot information received at the target time stored in the first array list when it is determined that the data storage amount of the first array list satisfies a storage condition includes:
and sequentially comparing the target pilot information with historical pilot information received at the target moment and stored in the first array list one by one along the longitudinal axis.
9. A random access apparatus, comprising:
the target processing module is used for carrying out target processing on pre-acquired target pilot information so as to determine a target element value contained in the target pilot information;
a channel adjusting module, configured to adjust a target channel used for sending a target response message of the target pilot information when it is determined that a target element value of the target pilot information meets a target condition;
and the information sending module is used for sending the target response information by using the adjusted target channel.
10. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 8 when executed.
11. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 8.
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