CN112153748A - Random access method, mobile terminal and network side equipment - Google Patents

Random access method, mobile terminal and network side equipment Download PDF

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Publication number
CN112153748A
CN112153748A CN201910570154.7A CN201910570154A CN112153748A CN 112153748 A CN112153748 A CN 112153748A CN 201910570154 A CN201910570154 A CN 201910570154A CN 112153748 A CN112153748 A CN 112153748A
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China
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target
parameter information
rach
system information
random access
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Chinese (zh)
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许彬
周欣
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Potevio Information Technology Co Ltd
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Potevio Information Technology Co Ltd
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Priority to CN201910570154.7A priority Critical patent/CN112153748A/en
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The embodiment of the invention provides a random access method, a mobile terminal and network side equipment. The method comprises the following steps: if the validity timer is judged to be out of date at the current moment, acquiring system information broadcasted by the network side equipment at the target moment; the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters; and replacing the original RACH parameter information stored by the target RACH parameter information, and performing random access based on the target RACH parameter information. The embodiment of the invention sets the validity timer for the RACH parameters, and only when the mobile terminal judges that the validity timer exceeds the validity at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, so that the updated RACH parameters are acquired, the validity of the RACH parameters is ensured, and unnecessary signaling overhead and terminal power consumption are reduced.

Description

Random access method, mobile terminal and network side equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a random access method, a mobile terminal, and a network side device.
Background
In a research project of "5G new air interface" in' Non-terrestrial network oriented "of 3GPP, a deployment scenario of a Non-terrestrial network (NTN) including a satellite is defined. In mountainous regions, desert regions, sea and other regions, satellites are a supplement to and extension of the ground due to the difficulty in erecting base stations. By means of the wide area coverage capability of the satellite, an operator can provide 5G commercial service in an area where a base station cannot be erected, 5G service continuity is achieved, and the satellite communication system plays an important role in scenes such as emergency communication, maritime communication, aviation communication and communication along a railway.
In the NTN communication system, a satellite flies in space of several hundred to several tens of thousands of kilometers, for a Geostationary Earth Orbit (GEO) satellite, a maximum Round Trip Delay (RTD) may reach five hundred or more milliseconds, which is much higher than the RTD in a ground network communication system, and even for a Low Orbit (LEO) satellite, the maximum RTD may reach several tens of milliseconds.
The mobile terminal UE establishes a connection with the satellite through random access and acquires uplink synchronization, and the UE can perform uplink transmission only if acquiring uplink synchronization with the satellite, so random access is a very important function in the NTN communication system.
For Random Access, in order to adapt to a larger RTD in the NTN communication system, Random Access Channel (RACH) parameters are modified, where the RACH parameters include a common time advance, a Random Access response window and an offset of a configured delayed start, a Random Access contention resolution timer and an offset of a configured delayed start, and the like.
Due to the rapid movement of the satellite, the radio link transmission delay changes rapidly, and the satellite will frequently update these RACH parameters and transmit the system information to each UE in its coverage area. And each UE receives the updated RACH parameters transmitted by the satellite, and when random access needs to be initiated, the UE performs random access based on the updated RACH parameters. However, each UE receiving the system information frequently to acquire the updated RACH parameters would greatly increase unnecessary signaling overhead and terminal power consumption.
Disclosure of Invention
Aiming at the technical problems in the prior art, the embodiments of the present invention provide a random access method, a mobile terminal and a network side device.
In a first aspect, an embodiment of the present invention provides a random access method, including:
if the validity timer is judged to be out of date at the current moment, acquiring system information broadcasted by the network side equipment at the target moment; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters;
replacing the original RACH parameter information stored by the target RACH parameter information, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters.
In a second aspect, an embodiment of the present invention provides a random access method, including:
broadcasting system information based on a system information broadcasting period, wherein the system information comprises target RACH parameter information, the target RACH parameter information comprises a plurality of groups of target RACH parameters and a valid period corresponding to each group of target RACH parameters, so that if a mobile terminal judges that a valid period timer exceeds the period at the current moment, the system information broadcasted by network side equipment is acquired at the target moment, the target RACH parameter information is replaced by original RACH parameter information stored by the mobile terminal, and random access is performed based on the target RACH parameter information;
the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
In a third aspect, an embodiment of the present invention provides a mobile terminal, including:
the information acquisition module is used for acquiring system information broadcasted by the network side equipment at a target moment if the validity timer is judged to be out of date at the current moment; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters;
the random access module is used for replacing the target RACH parameter information with original RACH parameter information stored by the random access module, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters.
In a fourth aspect, an embodiment of the present invention provides a network side device, including:
the system comprises a broadcasting module, a target RACH parameter information acquisition module and a target RACH parameter information acquisition module, wherein the system information comprises target RACH parameter information, the target RACH parameter information comprises a plurality of groups of target RACH parameters and a valid period corresponding to each group of target RACH parameters, so that if the mobile terminal judges that the valid period timer exceeds the period at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, the target RACH parameter information is replaced by the original RACH parameter information stored by the mobile terminal, and random access is performed based on the target RACH parameter information;
the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
In a fifth aspect, an embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method according to the first aspect or the second aspect when executing the program.
In a sixth aspect, embodiments of the present invention provide a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the method as provided in the first or second aspect.
According to the random access method, the mobile terminal and the network side equipment provided by the embodiment of the invention, the effective period timer is set for the RACH parameters, and only when the mobile terminal judges that the effective period timer exceeds the period at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, so that the updated RACH parameters are acquired, the effectiveness of the RACH parameters is ensured, and unnecessary signaling overhead and terminal power consumption are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a random access method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a system information broadcasting cycle according to an embodiment of the present invention;
fig. 3 is a flowchart of a random access method according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;
fig. 6 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a random access method according to an embodiment of the present invention, and as shown in fig. 1, an execution subject of the random access method according to the embodiment of the present invention is a mobile terminal, for example, a mobile phone, and the method includes:
step 101, if the validity timer is judged to be out of date at the current moment, acquiring system information broadcasted by network side equipment at a target moment; the target time is not earlier than the current time and is a time when the network side device broadcasts system information based on a system information broadcast cycle, the system information includes target RACH parameter information, and the target RACH parameter information includes a plurality of groups of target RACH parameters and an expiration date corresponding to each group of target RACH parameters.
Specifically, in the embodiment of the present invention, an expiration timer is set for the RACH parameters, and the expiration timer is located in the mobile terminal or located outside the mobile terminal, which is not specifically limited in the embodiment of the present invention. The mobile terminal determines whether to acquire the system information broadcasted by the network side equipment (satellite) by judging whether the validity timer is expired, and determines to acquire the system information broadcasted by the satellite when the validity timer is judged to be expired. It should be noted that the expiration of the validity timer means that the operating time of the validity timer is longer than the rated operating time, where the operating time means the time length from the time when the validity timer restarts to operate after the last operating time is cleared to zero to the current time, and the rated operating time is set according to an actual situation, which is not specifically limited in the embodiment of the present invention.
Further, if the mobile terminal knows that the validity timer is expired at the current moment, the mobile terminal acquires the system information of the satellite broadcast at the target moment.
It should be noted that the satellite periodically broadcasts the System Information based on a System Information broadcast period, wherein the System Information broadcast period may be determined by the System Information in which the target RACH parameters are located, such as a System Information Block 2 (SIB 2) or other SIBs. Meanwhile, in order to reduce signaling overhead, the update of RACH parameters in system information does not result in system information change notification.
Fig. 2 is a schematic diagram of a system information broadcasting cycle according to an embodiment of the present invention, as shown in fig. 2, a satellite acquires and broadcasts system information once at time 1, acquires and broadcasts system information once at time 2, and acquires and broadcasts system information once at time 3, where if the system information broadcasting cycle is 5s, time 1 is 5s apart from time 2, and time 2 is 5s apart from time 3.
If the mobile terminal judges that the validity timer is out of date at the current time A, and the current time A is between the time 1 and the time 2, because the target time is not earlier than the current time A and is the time when the satellite closest to the current time A broadcasts the system information based on the system information broadcasting period, the target time is the time 2, and the mobile terminal acquires the system information broadcasted by the satellite at the time 2.
The reason why the target time is set to the time at which the satellite closest to the current time a broadcasts the system information based on the system information broadcast cycle is that: in order to enable the mobile terminal to perform random access based on the updated RACH parameters sent by the satellite as soon as possible after the validity period timer expires, the network access time delay of the mobile terminal is reduced.
Explaining system information of satellite broadcasting acquired by a mobile terminal at a target moment, wherein the system information at least comprises target RACH parameter information, the target RACH parameter information is RACH parameter information acquired at the target moment, the RACH parameter information at least comprises 5 groups of target RACH parameters and valid periods corresponding to each group of target RACH parameters, and the valid periods are respectively as follows:
a public time advance and a corresponding validity period;
a random access response window, an offset and a corresponding validity period;
a random access contention resolution timer, an offset and a corresponding validity period;
preamble transmission power and corresponding validity period;
power ramp-up factor and corresponding expiration.
The common time advance is calculated by the satellite according to the distance between the satellite and each UE in the coverage area, and the specific calculation process is as follows: firstly, the satellite acquires the distance between the satellite and each UE in the coverage area of the satellite to obtain a plurality of distances, the minimum distance in the plurality of distances is used as the minimum distance to determine the UE corresponding to the minimum distance, and then, half of RTD between the satellite and the UE corresponding to the minimum distance is used as the common time advance. In the random access process, the UE adds the time advance in the random access response message and the common time advance in the system information together to serve as the final time advance to help the UE to complete uplink synchronization.
For the random access response window, after sending the preamble, the UE starts the timer, and monitors a Physical Downlink Control Channel (PDCCH) within the time window of the random access response window to receive the random access response message. The window length is usually 10ms at most, the offset is similar to the calculation process of the public time advance, and the RTD between the satellite and the UE corresponding to the minimum distance is used as the offset to represent the time offset of the delayed start of the random access response window in the random access process.
For the random access contention resolution timer, the UE starts the timer after transmitting msg3, and during the running of the timer, it always monitors the PDCCH to receive the contention resolution message. The maximum working time of the timer is 64ms, the offset is the same as the calculation process of the offset of the random access response window, and details are not repeated here, which indicates the time offset of the delayed start of the contention resolution timer in the random access process.
The preamble transmission power defines the initial transmission power of the preamble, and the power ramping factor determines the transmission power ramping step size of the preamble for each random access attempt. The two parameters can be determined by the network side device according to the RTD between the satellite and the UE corresponding to the minimum distance, and generally, the larger the RTD is, the larger the preamble transmission power and the power boost factor value are.
It should be noted that the validity period corresponding to each set of target RACH parameters refers to a time for which the set of parameters remains valid.
The validity period can be determined by the time required for the satellite to move by the distance deltaS, and if the satellite speed is v, the validity period is deltaS/v. The validity period may also be n times the system information broadcast period, and n is greater than or equal to 1. It should be noted that the validity period may also be set according to actual situations, and the setting is not specifically limited in the embodiment of the present invention.
102, replacing the target RACH parameter information with original RACH parameter information stored by the target RACH parameter information, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters.
Specifically, before the target time, the mobile terminal itself stores original RACH parameter information, where the original RACH parameter information at least includes the 5 sets of original RACH parameters and the validity period corresponding to each set of original RACH parameters. It should be noted that the original target RACH parameter information and the target RACH parameter information are different in that specific values of the same parameter included in the original target RACH parameter information and the target RACH parameter information may be different.
After the mobile terminal acquires the system information of the satellite broadcast at the target moment, the target RACH parameter information is replaced by the original RACH parameter information stored by the mobile terminal, namely, the mobile terminal deletes the original RACH parameter information stored by the mobile terminal and stores the target RACH parameter information.
And, the mobile terminal performs random access based on the target RACH parameter information, and a specific random access process is described in detail in the prior art and is not described herein again.
According to the random access method provided by the embodiment of the invention, the validity timer is set for the RACH parameters, and only when the mobile terminal judges that the validity timer exceeds the validity at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, so that unnecessary signaling overhead and terminal power consumption are reduced. And parameters such as the common time lead, two offsets, the preamble transmission power and the power boost factor are determined based on the RTD, and meanwhile, the validity period of the target RACH parameter is configured, so that the validity of the target RACH parameter can be ensured, and the mobile terminal can better complete random access according to the target RACH parameter.
Based on any of the above embodiments, the embodiment of the present invention describes a process of determining whether the validity timer expires by the mobile terminal, that is, if it is determined at the current time that the validity timer expires, system information broadcasted by the network side device is obtained at the target time, and the method further includes:
in a plurality of valid periods in which a plurality of groups of original RACH parameters are in one-to-one correspondence, taking the minimum valid period as the rated working time of the valid period timer;
and if the working time of the validity timer exceeds the rated working time, judging that the validity timer exceeds the period.
Specifically, before the target time, the mobile terminal itself stores the original RACH parameter information, i.e., a plurality of sets of original RACH parameters and a validity period corresponding to each set of original RACH parameters.
For example, if the validity period corresponding to the set of parameters including the time advance and the common time advance is referred to as validity period 1, the validity period 1 is 6s, the validity period corresponding to the set of parameters including the random access response window and the offset is referred to as validity period 2, the validity period 2 is 7s, the validity period corresponding to the set of parameters including the random access contention resolution timer and the offset is referred to as validity period 3, the validity period 3 is 8s, the validity period corresponding to the set of parameters including the preamble transmission power is referred to as validity period 4, the validity period 4 is 9s, the validity period corresponding to the set of parameters including the power boost factor is referred to as validity period 5, and the validity period 5 is 10s, in 5 effective periods of the effective period 1, the effective period 2, the effective period 3, the effective period 4 and the effective period 5, the minimum validity period 1 is set as the rated operation time of the validity period timer, that is, 6s is set as the rated operation time of the validity period timer.
And if the working time of the validity timer exceeds 6s, judging that the validity timer exceeds the period.
Based on any of the above embodiments, the present invention describes an operation performed after the mobile terminal acquires the system information broadcasted by the network side device at the target time, that is, if it is determined that the validity timer expires at the current time, the operation performed after acquiring the system information broadcasted by the network side device at the target time further includes:
and clearing the working time of the validity timer, and taking the minimum validity period as the rated working time of the validity timer in a plurality of validity periods in which a plurality of groups of target RACH parameters are in one-to-one correspondence.
Specifically, after the mobile terminal acquires the system information of the satellite broadcast, the mobile terminal resets the validity timer to zero, so that the validity timer restarts to work, and the rated working time of the validity timer is reset.
In the embodiment of the invention, in a plurality of valid periods corresponding to a plurality of groups of target RACH parameters one by one, the minimum valid period is determined, and the minimum valid period is used as the rated working time of the valid period timer.
Based on any of the above embodiments, the validity periods of the multiple sets of target RACH parameters in a one-to-one correspondence are the same or different.
Based on any of the above embodiments, for any set of target RACH parameters, the validity period corresponding to the target RACH parameters is n times of the system information broadcast period, and n is greater than or equal to 1.
Based on any of the above embodiments, fig. 3 is a flowchart of a random access method according to another embodiment of the present invention, as shown in fig. 3, an execution subject of the method is a network-side device, for example, a satellite, and as shown in fig. 3, the method includes:
step 301, broadcasting system information based on a system information broadcasting cycle, wherein the system information includes target RACH parameter information, the target RACH parameter information includes multiple sets of target RACH parameters and a validity period corresponding to each set of target RACH parameters, so that if a mobile terminal judges that a validity period timer expires at a current time, the mobile terminal acquires the system information broadcasted by a network side device at the target time, replaces original RACH parameter information stored by the mobile terminal with the target RACH parameter information, and performs random access based on the target RACH parameter information;
the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
Specifically, the satellite periodically broadcasts the system information based on the system information broadcast period, and the content carried in the system information is described in detail in the above embodiments, which is not described herein again.
If the mobile terminal judges that the validity timer exceeds the period at the current moment, the mobile terminal acquires system information broadcast by network side equipment at the target moment, replaces the original RACH parameter information stored by the mobile terminal with the target RACH parameter information, and carries out random access based on the target RACH parameter information.
According to the random access method provided by the embodiment of the invention, the network side equipment broadcasts the system information based on the system information broadcasting period, the RACH parameter is provided with the validity timer, and the system information broadcasted by the network side equipment is acquired at the target time only when the mobile terminal judges that the validity timer exceeds the validity at the current time, so that unnecessary signaling overhead and terminal power consumption are reduced. And parameters such as the common time lead, two offsets, the preamble transmission power and the power boost factor are determined based on the RTD, and meanwhile, the validity period of the target RACH parameter is configured, so that the validity of the target RACH parameter can be ensured, and the mobile terminal can better complete random access according to the target RACH parameter.
Based on any of the above embodiments, fig. 4 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention, and as shown in fig. 4, the mobile terminal includes:
an information obtaining module 401, configured to obtain system information broadcasted by a network side device at a target time if it is determined that the validity timer expires at the current time; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters; a random access module 402, configured to replace original RACH parameter information stored in the random access module with the target RACH parameter information, and perform random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters.
Specifically, in the embodiment of the present invention, if the obtaining module 401 of the mobile terminal information obtains that the validity timer is expired at the current time, the system information of the satellite broadcast is obtained at the target time. The random access module 402 of the mobile terminal information replaces the original RACH parameter information stored by the mobile terminal with the target RACH parameter information, that is, the mobile terminal deletes the original RACH parameter information stored by the mobile terminal, and then stores the target RACH parameter information.
And, the mobile terminal performs random access based on the target RACH parameter information, and a specific random access process is described in detail in the prior art and is not described herein again.
According to the mobile terminal provided by the embodiment of the invention, the validity timer is set for the RACH parameter, and only when the mobile terminal judges that the validity timer exceeds the validity at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, so that unnecessary signaling overhead and terminal power consumption are reduced. And parameters such as the common time lead, two offsets, the preamble transmission power and the power boost factor are determined based on the RTD, and meanwhile, the validity period of the target RACH parameter is configured, so that the validity of the target RACH parameter can be ensured, and the mobile terminal can better complete random access according to the target RACH parameter.
Based on any of the above embodiments, fig. 5 is a schematic structural diagram of a network-side device according to an embodiment of the present invention, and as shown in fig. 5, the network-side device includes:
a broadcasting module 501, configured to broadcast system information based on a system information broadcasting cycle, where the system information includes target RACH parameter information, and the target RACH parameter information includes multiple sets of target RACH parameters and a validity period corresponding to each set of target RACH parameters, so that if a mobile terminal determines that a validity period timer expires at a current time, the mobile terminal acquires system information broadcasted by a network side device at a target time, replaces original RACH parameter information stored in the mobile terminal with the target RACH parameter information, and performs random access based on the target RACH parameter information; the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
Specifically, the broadcasting module 501 of the satellite periodically broadcasts the system information based on the system information broadcasting period, and the content carried in the system information is described in detail in the above embodiments, and is not described herein again.
If the mobile terminal judges that the validity timer exceeds the period at the current moment, the mobile terminal acquires system information broadcast by network side equipment at the target moment, replaces the original RACH parameter information stored by the mobile terminal with the target RACH parameter information, and carries out random access based on the target RACH parameter information.
According to the network side equipment provided by the embodiment of the invention, the network side equipment broadcasts the system information based on the system information broadcasting period, the RACH parameter is provided with the validity timer, and the system information broadcasted by the network side equipment is acquired at the target time only when the mobile terminal judges that the validity timer exceeds the validity at the current time, so that unnecessary signaling overhead and terminal power consumption are reduced. And parameters such as the common time lead, two offsets, the preamble transmission power and the power boost factor are determined based on the RTD, and meanwhile, the validity period of the target RACH parameter is configured, so that the validity of the target RACH parameter can be ensured, and the mobile terminal can better complete random access according to the target RACH parameter.
Fig. 6 is a schematic entity structure diagram of an electronic device according to an embodiment of the present invention, and as shown in fig. 6, the electronic device may include: a processor (processor)601, a communication Interface (Communications Interface)602, a memory (memory)603 and a communication bus 604, wherein the processor 601, the communication Interface 602 and the memory 603 complete communication with each other through the communication bus 604. The processor 601 may call a computer program stored on the memory 603 and executable on the processor 601 to perform the methods provided by the above embodiments, including for example: if the validity timer is judged to be out of date at the current moment, acquiring system information broadcasted by the network side equipment at the target moment; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters; replacing the original RACH parameter information stored by the target RACH parameter information, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters. Or broadcasting system information based on a system information broadcasting period, wherein the system information comprises target RACH parameter information, the target RACH parameter information comprises a plurality of groups of target RACH parameters and a validity period corresponding to each group of target RACH parameters, so that if the mobile terminal judges that the validity period timer exceeds the period at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, the target RACH parameter information is replaced by the original RACH parameter information stored by the mobile terminal, and random access is performed based on the target RACH parameter information; the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
In addition, the logic instructions in the memory 603 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in 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.
Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and the method includes: if the validity timer is judged to be out of date at the current moment, acquiring system information broadcasted by the network side equipment at the target moment; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters; replacing the original RACH parameter information stored by the target RACH parameter information, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters. Or broadcasting system information based on a system information broadcasting period, wherein the system information comprises target RACH parameter information, the target RACH parameter information comprises a plurality of groups of target RACH parameters and a validity period corresponding to each group of target RACH parameters, so that if the mobile terminal judges that the validity period timer exceeds the period at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, the target RACH parameter information is replaced by the original RACH parameter information stored by the mobile terminal, and random access is performed based on the target RACH parameter information; the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A random access method, comprising:
if the validity timer is judged to be out of date at the current moment, acquiring system information broadcasted by the network side equipment at the target moment; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters;
replacing the original RACH parameter information stored by the target RACH parameter information, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters.
2. The random access method of claim 1, wherein if it is determined at the current time that the validity timer expires, the system information broadcasted by the network-side device is acquired at the target time, and the method further comprises:
in a plurality of valid periods in which a plurality of groups of original RACH parameters are in one-to-one correspondence, taking the minimum valid period as the rated working time of the valid period timer;
and if the working time of the validity timer exceeds the rated working time, judging that the validity timer exceeds the period.
3. The random access method of claim 1, wherein if it is determined at the current time that the validity timer expires, the system information broadcasted by the network-side device is acquired at the target time, and then the method further comprises:
and clearing the working time of the validity timer, and taking the minimum validity period as the rated working time of the validity timer in a plurality of validity periods in which a plurality of groups of target RACH parameters are in one-to-one correspondence.
4. The random access method of claim 1, wherein the validity periods of the sets of target RACH parameters in a one-to-one correspondence are the same or different.
5. The random access method of claim 1, wherein for any set of target RACH parameters, the validity period of the target RACH parameters is n times of the system information broadcast period, and n is greater than or equal to 1.
6. A random access method, comprising:
broadcasting system information based on a system information broadcasting period, wherein the system information comprises target RACH parameter information, the target RACH parameter information comprises a plurality of groups of target RACH parameters and a valid period corresponding to each group of target RACH parameters, so that if a mobile terminal judges that a valid period timer exceeds the period at the current moment, the system information broadcasted by network side equipment is acquired at the target moment, the target RACH parameter information is replaced by original RACH parameter information stored by the mobile terminal, and random access is performed based on the target RACH parameter information;
the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
7. A mobile terminal, comprising:
the information acquisition module is used for acquiring system information broadcasted by the network side equipment at a target moment if the validity timer is judged to be out of date at the current moment; the target time is not earlier than the current time and is the time when the network side equipment broadcasts system information based on a system information broadcast cycle, wherein the system information comprises target RACH parameter information, and the target RACH parameter information comprises a plurality of groups of target RACH parameters and an effective period corresponding to each group of target RACH parameters;
the random access module is used for replacing the target RACH parameter information with original RACH parameter information stored by the random access module, and performing random access based on the target RACH parameter information; the original RACH parameter information comprises a plurality of groups of original RACH parameters and an effective period corresponding to each group of original RACH parameters.
8. A network-side device, comprising:
the system comprises a broadcasting module, a target RACH parameter information acquisition module and a target RACH parameter information acquisition module, wherein the system information comprises target RACH parameter information, the target RACH parameter information comprises a plurality of groups of target RACH parameters and a valid period corresponding to each group of target RACH parameters, so that if the mobile terminal judges that the valid period timer exceeds the period at the current moment, the system information broadcasted by the network side equipment is acquired at the target moment, the target RACH parameter information is replaced by the original RACH parameter information stored by the mobile terminal, and random access is performed based on the target RACH parameter information;
the target time is not earlier than the current time, and is a time when the network side device broadcasts system information based on a system information broadcast cycle, and the original RACH parameter information includes multiple sets of original RACH parameters and an expiration date corresponding to each set of original RACH parameters.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the random access method according to any of claims 1 to 6 are implemented when the processor executes the program.
10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the random access method according to any one of claims 1 to 6.
CN201910570154.7A 2019-06-27 2019-06-27 Random access method, mobile terminal and network side equipment Withdrawn CN112153748A (en)

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