CN111355563A - Random access method and device, terminal and storage medium - Google Patents

Abstract

The embodiment of the invention discloses a random access method, which comprises the following steps: based on first configuration information sent by a base station, sending a first connection request by adopting first open-loop power; the first open-loop power is calculated by adopting an open-loop power control mode; when a first conflict solution message fed back by the base station to the first connection request is not monitored, confirming to enter a retransmission process of the first connection request, and recording the current retransmission times; according to the current retransmission times, the first open-loop power is increased to obtain first accumulated power; when the first accumulated power is smaller than the preset maximum power, sending a first connection retransmission request by adopting the first accumulated power; and when monitoring and receiving a second conflict solution message fed back by the base station to the first connection retransmission request, sending a connection confirmation message according to the second conflict solution message, and completing a random access process. The embodiment of the invention also discloses a random access device, a terminal and a storage medium.

Description

A random access method and device, terminal and storage medium

technical field

The present invention relates to the field of mobile communications, and in particular, to a random access method and device, a terminal and a storage medium.

Background technique

Narrow Band Internet of Things (NB-IoT) is a narrowband Internet of Things mobile communication system that has emerged in recent years. The characteristics of NB-IoT systems are: narrow bandwidth occupation, low implementation complexity, low cost, ultra-low Power consumption and super coverage; the uplink and downlink of the NB-IoT system adopts the half-duplex FDD method, so the process of one uplink and downlink service interaction takes a long time.

However, in the current half-duplex FDD method, the power configuration method of the traffic channel has the problem of low random access success rate of the terminal.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present invention expect to provide a random access method and device, a terminal, and a storage medium, which can improve the success rate of random access of the terminal.

The technical solution of the embodiment of the present invention is realized as follows:

In a first aspect, an embodiment of the present invention provides a random access method, which is applied to a terminal, and the method includes:

Based on the first configuration information sent by the base station, the first connection request is sent by using the first open-loop power; wherein, the first open-loop power is the power calculated by using the open-loop power control method;

When the first conflict resolution message fed back by the base station to the first connection request is not monitored, confirm to enter the retransmission process of the first connection request, and record the current number of retransmissions;

Raise the first open-loop power according to the current number of retransmissions to obtain a first accumulated power;

When the first accumulated power is less than the preset maximum power, use the first accumulated power to send a first connection retransmission request;

When monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, according to the second conflict resolution message, a connection confirmation message is sent to complete a random access process.

In a second aspect, an embodiment of the present invention provides a random access device, where the device includes:

a first sending unit, configured to send a first connection request by using a first open-loop power based on the first configuration information sent by the base station; wherein, the first open-loop power is a power calculated by using an open-loop power control method;

A confirmation unit, configured to confirm entering the retransmission process of the first connection request when the first conflict resolution message fed back by the base station to the first connection request is not monitored, and record the current number of retransmissions;

an accumulating unit, configured to increase the first open-loop power according to the current number of retransmissions to obtain a first accumulated power;

The first sending unit is further configured to send a first connection retransmission request by using the first accumulated power when the first accumulated power is less than the preset maximum power;

a second sending unit, configured to send a connection confirmation message according to the second conflict resolution message when monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request to complete a random connection into the process.

In a third aspect, an embodiment of the present invention provides a terminal, where the terminal at least includes: a processor, a memory, a communication interface, and a bus for connecting the processor, the memory, and the communication interface; the processor is configured to execute all The random access program stored in the memory is used to implement the method in the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium on which a random access program is stored and applied in a terminal, where the random access program is implemented as described in the first aspect when the random access program is executed by a processor. the method described

Embodiments of the present invention provide a random access method and device, a terminal, and a storage medium. The method includes: based on first configuration information sent by a base station, using a first open-loop power to send a first connection request; wherein the first The first open-loop power is the power calculated by the open-loop power control method; when the first conflict resolution message fed back by the base station to the first connection request is not monitored, the retransmission of the first connection request is confirmed. process, and record the current number of retransmissions; increase the first open-loop power according to the current number of retransmissions to obtain the first accumulated power; when the first accumulated power is less than the preset maximum power, use the first accumulating power, and sending a first connection retransmission request; when monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, sending a connection confirmation message according to the second conflict resolution message, Complete a random access procedure. That is to say, in a random access method proposed by an embodiment of the present invention, when the terminal fails to send the first connection request using open-loop power, the first connection is performed by the terminal autonomously increasing the power according to the current number of retransmissions. The retransmission of the request improves the success rate of random access of the terminal.

Description of drawings

1 is a schematic diagram of a channel interaction process between a terminal and a base station in a random access process;

FIG. 2 is a flowchart 1 of a random access method proposed by an embodiment of the present invention;

3 is an example diagram of power configuration for sending an initial msg3 transmission and several retransmissions in a random access process of a terminal according to an embodiment of the present invention;

FIG. 4 is a state transition flowchart of a random access process in an embodiment of the present invention;

FIG. 5 is a second implementation flowchart of an access method proposed by an embodiment of the present invention;

FIG. 6 is a diagram of a random access device proposed by an embodiment of the present invention;

FIG. 7 is a schematic diagram of a composition structure of a terminal according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. All other embodiments obtained under the premise of creative work fall within the protection scope of the present invention.

In a mobile communication system, a terminal needs to establish a connection with a base station after finding a cell, and needs to perform a random access procedure. Figure 1 is a schematic diagram of the channel interaction process between the terminal and the base station in the random access process. As shown in Figure 1, the random access process is: the base station provides the primary synchronization signal (Primary Synchronization Signal, PSS) of the synchronization channel and the secondary synchronization signal ( Secondary Synchronization Signal, SSS), the terminal decides to send the random access preamble msg1 based on the received signal strengths of the PSS and SSS, and msg1 is sent based on the Physical Random Access Channel (PRACH); the base station receives the random access preamble message msg1. After the preamble message msg1, a random access response msg2 is sent, and msg2 is sent based on the physical downlink control channel (Physical Downlink Control Channel, PDCCH) and the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH); An uplink shared channel (Physical Uplink Shared Channel, PUSCH) sends msg3, where msg3 mainly includes a connection request; after receiving msg3, the base station sends a conflict resolution message msg4 based on PDCCH and PDSCH; after receiving msg4, the terminal sends a conflict resolution message msg4 based on the physical uplink A control channel (Physical Uplink Control Channel, PUCCH) feeds back an acknowledgment message (Acknowledgement, ACK) indicating access success or a non-acknowledgement message (Negative ACKnowledgment, NACK) indicating an access failure, completing a random access process. After a random access is completed, the terminal can perform the data service of downloading or uploading.

In the above-mentioned random access process, the channel through which the terminal sends a message to the base station is called an uplink channel, and the uplink channel includes two types: PRACH and PUSCH.

Among them, the power control implementation mode on PRACH is: the number of preamble retransmissions on PRACH is (1, 2, 4, 8, 16, 32, 64, 128). If multiple levels of retransmission times are configured, the lowest level retransmission times The PRACH of the number of transmissions adopts the power ramping method, and the PRACH of other repetition levels adopts the maximum power transmission. When only one level of retransmission times is configured, msg1 is also sent in a power-up manner.

The power control implementation of PUSCH is as follows: when the configured number of resource repetitions on PUSCH is greater than 2, PUSCH uses the maximum power to transmit; when the configured number of resource repetitions on PUSCH is less than or equal to 2, PUSCH uses open-loop power control way to send msg3.

The power configuration of the current PUSCH is implemented as described above, which can meet general application scenarios. However, if the terminal is in a very weak field or a medium-strong field, and there are multiple terminals doing services together, when the configured resource repetition times are less than or equal to 2, the power obtained according to the traditional open-loop power control method will cause the transmission of If the power is too small, the error probability of the base station receiving msg4 increases, which directly affects the random access success probability of the terminal, which not only greatly increases the random access time, increases the system power consumption, but also affects the experience of the terminal user.

In this regard, an embodiment of the present invention provides a random access method for autonomously boosting power of a terminal. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

An embodiment of the present invention provides a random access method. FIG. 2 is a flowchart of a random access method proposed by an embodiment of the present invention. As shown in FIG. 2 , in the embodiment of the present invention, the random access of the terminal is The entry method may include the following steps:

S101. Based on the first configuration information sent by the base station, use a first open-loop power to send a first connection request, where the first open-loop power is a power calculated by using an open-loop power control manner.

In the embodiment of the present invention, the terminal uses the first open-loop power to send the first connection request based on the first configuration information sent by the base station, and the first open-loop power is calculated in an open-loop power control manner.

In the embodiment of the present invention, the calculation method of the open-loop power on the PUSCH is as follows:

PN_c(i)=min{PCMAX_c(i),10log10(MN_c(i))+PO_N_c(j)+α_c(j)*PLc} (1)

Wherein, PCMAX_c(i) is the maximum power 23dBm of the terminal defined in 3GPP protocol 36.101, and MN_c(i) represents the number of RBs used for PUSCH transmission in subframe i.

In addition, PO_N_c(j)=PO_NOMINAL_N_c(j)+PO_UE_N_c(j), which is a semi-statically set power reference value. Among them, PO_NOMINAL_N_c(j) is a cell-specific parameter, and PO_UE_N_c(j) is a terminal-specific parameter, both of which are indicated by high-level signaling. In addition, the value of parameter j is related to the data packet transmitted in the uplink. When transmitting the data packet with semi-persistent permission, j=0; when transmitting the data packet with dynamic scheduling permission, j=1; when transmitting the random access response For a permitted packet, j=2.

Further, α_c(j) is the cell-specific compensation amount for path loss, the value of α_c(j) is controlled by high-level signaling, and PLc is the downlink path loss estimated by the terminal.

It should be noted that, in the embodiment of the present invention, the terminal searches for the cells covered by the base station based on the signal strength of PSS and SSS, receives the first configuration information of random access sent by the base station, and uses the first configuration information according to the first configuration information. Ring Power sends the first connection request.

Specifically, in the embodiment of the present invention, the terminal uses the first open-loop power to send the first connection request based on the first configuration information sent by the base station, including: the terminal receives the first configuration information sent by the base station; according to the first configuration information , send the first random access preamble message; receive the first random access response sent by the base station based on the first random access preamble message, the first random access response carries the first resource repetition times; the first resource repetition times represents the Repetitive transmission times of the resource; obtaining the first open-loop power according to the first repetition of the resource; determining that the first open-loop power is used to send the first connection request.

In the embodiment of the present invention, the first configuration information includes the number of preamble retransmissions. The number of preamble retransmissions is used to repeat the PRACH to enhance the signal strength on the PRACH, and the terminal sends the first random access preamble message based on the PRACH.

It should be noted that, in the embodiment of the present invention, before the terminal sends the first random access preamble message, the terminal randomly selects a preamble from public resources, and sends the random access preamble message according to the selected preamble. The transmission power of the random access preamble message is determined according to the number of retransmissions of the preamble in the first configuration information, specifically: when the number of retransmissions of the current guide is greater than 1, the terminal uses the maximum power to send; the number of retransmissions of the current guide is 1 or only configured When a retransmission level is reached, the terminal sends the random access preamble message in the following power ramping manner:

Pprach=min{PCMAX_c(i),P _Target +PLc} (2)

Among them, PCMAX_c(i) is the maximum power of the terminal defined by 3GPP protocol 36.101 of 23dBm; PLc is the downlink path loss estimated by the terminal, and P _Target is the target transmit power. The calculation of P _Target is as follows:

Among them, △ _{powerRampingStep} ∈{0,2,4,6}dB, △ _{powerRampingStep} is the power boost factor, P _{Init_Target} is the initial target power, PREAMBLE_TRANSMISSION_COUNTER is the number of PRACH transmissions, corresponding to the first random access process; numRepetitionPerPreambleAttempt is a random access The number of retransmissions of the preamble in the incoming process is defined by the upper layer of the LTE access system. In addition, the initial target power P _{Init_Target} is calculated based on the 3GPP protocol and belongs to one of the following initial preamble transmission powers. The preamble initial transmission power is:

preambleInitialReceivedTargetPower ENUMERATED{

dBm-120,dBm-118,dBm-116,dBm-114,dBm-112,

dBm-110,dBm-108,dBm-106,dBm-104,dBm-102,

dBm-100,dBm-98,dBm-96,dBm-94,

dBm-92,dBm-90}

In addition, it should be noted that, in the embodiment of the present invention, because the random access preamble of the terminal is randomly selected from the public resources, there are different terminals sending the same access on the same time-frequency resource. possible preamble.

Further, after sending the random preamble message, the terminal will receive the first random access response sent by the base station based on the first random access preamble message, and the first random access response carries the first resource repetition times, the first resource repetition times Indicates the number of repeated transmissions of the resource.

It should be noted that, in the embodiment of the present invention, the number of times of repetition of the first resource determines how many timeslots the resource occupies for transmission.

Exemplarily, when a resource needs to occupy one time slot for transmission, when the number of repetitions of the first resource is 2, the terminal uses both time slots to transmit the resource.

In addition, it should be noted that if the terminal does not receive the first random access response sent by the base station, the terminal will reselect the preamble and send the random access preamble message until the random access response sent by the base station is correctly received or time out. Moreover, different terminals may send the same access preamble message, so different terminals may receive the same random access response message.

Furthermore, in the embodiment of the present invention, after receiving the first random access response sent by the base station carrying the number of repetitions of the first resource to be repeated, the terminal determines the transmission power of the PUSH according to the number of repetitions of the first resource.

Specifically, when the number of repetitions of the first resource is less than or equal to 2, the terminal sends the first connection request with the first open-loop power, and the open-loop power is calculated by using the power calculated by using the open-loop power control formula (1) above. . When the number of repetitions of the first resource is greater than 2, the terminal transmits at a preset maximum power of 23 dBm.

S102. When the first conflict resolution message fed back by the base station to the first connection request is not monitored, confirm to enter the retransmission process of the first connection request, and record the current number of retransmissions.

In the embodiment of the present invention, after the terminal sends the first connection request, when it does not receive the first conflict resolution message fed back by the base station based on the first connection request, the terminal enters the retransmission process of the first connection request, and Record the current number of retransmissions.

It should be noted that, in the embodiment of the present invention, because the terminal receives the random access response message of the base station, it cannot determine that the random access response is sent to itself rather than to other terminals, so it needs to pass the terminal's random access response message. The first connection access request and the connection establishment message of the base station are used to resolve the random access conflict. The connection establishment message sent by the base station is the conflict resolution message fed back by the base station. After the terminal sends the first connection request, when it does not receive the first conflict resolution message fed back by the base station, the terminal confirms that the sending of the first connection request failed, and the terminal confirms that it has entered the retransmission process of the first connection request. At this time, the terminal will record The current number of retransmissions.

Further, in the embodiment of the present invention, when the terminal does not monitor the first conflict resolution message fed back by the base station to the first connection request, it confirms to enter the retransmission process of the first connection request, and after recording the current number of retransmissions, It also includes: when the current number of retransmissions exceeds a preset threshold for the number of retransmissions, using a preset maximum power to send a first connection retransmission request.

It should be noted that, in this embodiment of the present invention, the number of retransmissions is constrained by the preset number of retransmissions threshold, the terminal cannot retransmit unlimitedly, and the terminal is judging that the current number of retransmissions exceeds the preset number of retransmissions. When the threshold is set, it will try to send the first connection retransmission request with the preset maximum power.

Exemplarily, when the preset threshold for the number of retransmissions is 2, if the current number of retransmissions is 3, the terminal will transmit at 23 dBm.

S103. Increase the first open-loop power according to the current number of retransmissions to obtain the first accumulated power.

In the embodiment of the present invention, after confirming to enter the retransmission process of the first connection request, the terminal increases the first open-loop power according to the recorded current number of retransmissions to obtain the first accumulated power.

It should be noted that, in the embodiment of the present invention, the terminal uses the first open-loop power to initially transmit the first connection request, and when it cannot receive the first conflict resolution message fed back by the base station, the terminal increases the first connection request according to the current number of retransmissions. The open-loop power avoids the need to re-initiate the random access process due to insufficient transmit power on the uplink shared channel, resulting in the failure to send the first connection request, prolonging the time-consuming and high power consumption of random access of the terminal.

Exemplarily, when the terminal is a smart meter and the smart meter is buried underground, the detected field strength of the base station is very weak. At this time, when the terminal uses the first open-loop power to send the first connection request, the first Failed to send connection request. After the first connection request fails to be sent, the smart meter will restart the random access process, and may need to re-connect multiple times to connect to the base station, or there is a possibility that it cannot be connected to the base station.

Based on this, in the embodiment of the present invention, when the terminal determines that retransmission is required, the terminal increases the first open-loop power according to the recorded current number of retransmissions to obtain the first accumulated power, including: when the current number of retransmissions by the terminal does not exceed When the threshold for the number of retransmissions is preset, according to the current number of retransmissions, a preset power accumulation factor is accumulated for the first open-loop power to obtain the first accumulated power.

It should be noted that, in the embodiment of the present invention, the preset retransmission times threshold and the preset power accumulation factor are both preset by the designer according to actual cell conditions.

Exemplarily, in the embodiment of the present invention, the preset threshold for the number of retransmissions is 2, and the preset power accumulation factor is K, then when the first open-loop power of the terminal is P, and the terminal determines that retransmission is required, When the current number of retransmissions is the first retransmission, the obtained first accumulated power is P+K.

Further, in the embodiment of the present invention, when the current number of retransmissions does not exceed the preset number of retransmissions threshold, the terminal accumulates a preset power accumulation factor for the first open-loop power according to the current number of retransmissions to obtain the first accumulation factor. power, and also includes: when the current number of retransmissions does not exceed the preset number of retransmissions threshold, according to the corresponding relationship between the preset power accumulation factor and the number of retransmissions, and the current number of retransmissions, determine the preset power accumulation factor; preset The corresponding relationship between the power accumulation factor and the number of retransmissions indicates that the preset power accumulation factor is positively correlated with the number of retransmissions; the preset power accumulation factor is accumulated for the first open-loop power to obtain the first accumulated power.

It should be noted that, in the embodiment of the present invention, the corresponding relationship between the preset power accumulation factor and the number of retransmissions indicates that the preset power accumulation factor is positively correlated with the number of retransmissions, which means that as the number of retransmissions increases, the preset power accumulation factor increases. factor increases.

Exemplarily, in the embodiment of the present invention, when the current number of retransmissions is the second retransmission, the obtained first accumulated power is P+2*K. It can be understood that 2*K is greater than K.

It should be noted that, in the embodiment of the present invention, K raised during the first retransmission and 2*K raised during the second retransmission are only exemplary, and the first retransmission and the subsequent second retransmission are only exemplary. The preset power accumulation factor during transmission and the third retransmission is not limited to the proportional relationship defined in the above example, as long as it is designed to ensure that the next retransmission is larger than the preset power accumulation factor set in the previous retransmission, and can be It is sufficient to open a certain gap between the powers of the previous retransmission.

Further, in the embodiment of the present invention, the terminal increases the first open-loop power according to the current number of retransmissions, and after obtaining the first accumulated power, the method further includes: when the first accumulated power is greater than or equal to the preset maximum power, use the preset The maximum power sends the first connection retransmission request.

In the embodiment of the present invention, the preset maximum power is 23dBm specified in the protocol. When the terminal determines that the first accumulated power exceeds the preset maximum power, the terminal sends the first connection retransmission request with the preset maximum power.

Exemplarily, during the second retransmission, if the obtained first accumulated power is P+2*K, and P+2*K is greater than or equal to 23, the terminal sends the first connection retransmission request at 23 dBm.

S104. When the first accumulated power is less than the preset maximum power, use the first accumulated power to send a first connection retransmission request.

In the embodiment of the present invention, after obtaining the first accumulated power, when the first accumulated power is less than the preset maximum power, the terminal will use the first accumulated power to send the first connection retransmission request.

It should be noted that, in the embodiment of the present invention, the first accumulated power is less than the preset maximum power, which means that the first accumulated power is less than 23 dBm.

Exemplarily, FIG. 3 is an example diagram of a power configuration for sending an initial msg3 transmission and several retransmissions in a random access process of a terminal proposed by an embodiment of the present invention. As shown in FIG. 3 , when the terminal transmits msg3 for the first time, it sends Power P=Pini, where Pini is the open-loop power calculated by using open-loop power control. If the terminal receives the msg4 sent by the base station, the terminal does not perform retransmission. Only after the terminal fails to receive the msg4 sent by the base station, does the terminal need to perform re-forwarding. Specifically, when retransmitting msg3 for the first time, the transmit power of the terminal is P=Pini+K; when retransmitting msg3 for the second time, the transmit power of the terminal is P=Pini+2*K; when retransmitting msg3 for the third time When , the transmit power of the terminal is P=Pmax, and Pmax is the preset maximum power.

Fig. 4 is a state transition flow chart of the random access process in the embodiment of the present invention. As shown in Fig. 4, after sending msg1, the terminal will determine whether it successfully receives msg2. If the receiving fails, the terminal will continue to send msg1 to the base station. If the reception is successful, the terminal sends msg3. After sending msg3, the terminal will judge whether it has successfully received msg4. If the reception fails, the terminal will automatically increase the power and continue to send msg3 to the base station. If the reception is successful, the terminal will feed back ACK/NACK to the base station, completing once The interaction of upstream and downstream services.

It can be understood that, in this embodiment of the present invention, when the current number of retransmissions is within the preset threshold range of the number of retransmissions, the first accumulated power is the power accumulated on the basis of the open-loop power, and the terminal uses the first accumulated power. The accumulated power sends the first connection retransmission request; and as the number of retransmissions increases, when the first accumulated power increases to exceed the preset maximum power, the terminal sends the first connection retransmission request with the preset maximum power; when the terminal records the The current number of retransmissions exceeds the preset number of retransmissions threshold, and the terminal sends the first connection retransmission request with the preset maximum power. In the above retransmission strategy, the terminal autonomously increases the first power gradually, searches for the most suitable first accumulated power on the current channel, and uses the preset maximum power to transmit until the suitable first accumulated power cannot be found. On the one hand, the terminal itself is guaranteed. On the other hand, because the bandwidth of the base station channel is limited, the terminal itself does not use the preset maximum power to send each time during retransmission, which also ensures that the impact on other terminals is reduced.

Further, in the embodiment of the present invention, when the current number of retransmissions recorded by the terminal does not exceed the preset number of retransmissions, the terminal accumulates a preset power accumulation factor for the first open-loop power according to the current number of retransmissions to obtain the first open-loop power. The accumulated power includes: the terminal obtains the current channel environment; when the current retransmission times does not exceed the preset retransmission times threshold, setting the preset power accumulation factor according to the channel environment; wherein, the channel environment includes an indoor environment or an outdoor environment, and the outdoor environment is set. The preset power accumulation factor corresponding to the environment is greater than the preset power accumulation factor corresponding to the indoor environment; the first accumulated power is obtained by accumulating the preset power accumulation factor on the basis of the first open-loop power according to the current number of retransmissions.

It should be noted that, in the embodiment of the present invention, the way for the terminal to obtain the current channel environment may be that the terminal uses a sensor to monitor whether it is in an outdoor environment or an indoor environment.

Exemplarily, when the terminal detects that it is in an outdoor environment through a built-in sensor, the preset power accumulation factor is set to 3 dBm, and when it is monitored that it is in an indoor environment, the preset power accumulation factor is set to 2 dBm.

S105. When monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, send a connection confirmation message according to the second conflict resolution message to complete a random access process.

In the embodiment of the present invention, after sending the first connection retransmission request according to the first accumulated power, when receiving the second conflict resolution message fed back by the base station for the first connection retransmission request, the terminal will The solution message sends a connection confirmation message to the base station to complete a random access procedure.

It should be noted that, in the embodiment of the present invention, after the terminal sends the first connection retransmission request according to the first accumulated power, if it can receive the second conflict resolution message fed back by the base station for the first connection retransmission request, then The terminal sends a connection confirmation message according to the second conflict resolution message to feedback that the terminal has accessed normally. After the terminal has accessed normally, subsequent service data transmission can be performed.

It can be understood that, in the embodiment of the present invention, the terminal adopts the method of autonomously increasing the power, which saves the time consumed by the terminal for random access, and on this basis, saves the power consumption during random access of the terminal, and improves the performance of the terminal. The random access success rate improves customer satisfaction.

When the first accumulated power is less than the preset maximum power, the terminal uses the first accumulated power, and after sending the first connection retransmission request, if the terminal does not receive a second conflict resolution message fed back by the base station for the first connection retransmission request by monitoring , and the current number of retransmissions is greater than the preset number of retransmissions threshold, the second configuration information of random access is received, and the next random access process is started. As mentioned above, in the embodiment of the present invention, the number of retransmissions is constrained by the threshold, and it is impossible for the terminal to retransmit unlimitedly. When the terminal has not received the second conflict resolution message fed back by the base station after sending the first connection retransmission request with the first accumulated power, and the current number of retransmissions has exceeded the threshold of the number of retransmissions, it needs to start a new random access process.

When the first accumulated power is less than the preset maximum power, the terminal uses the first accumulated power, and after sending the first connection retransmission request, the terminal monitors the second conflict resolution message fed back by the base station to the first connection retransmission request, and also A new round of random access procedure can be started.

Further, FIG. 5 is a second implementation flowchart of an access method proposed by an embodiment of the present invention. As shown in FIG. 5 , after step S105, a random access method of a terminal may further include the following steps:

S106. Obtain a second open-loop power based on the third configuration information sent by the base station, where the second open-loop power is a power calculated in an open-loop power control manner.

In the embodiment of the present invention, after completing one random access procedure, the terminal may perform the next random access procedure, and the terminal obtains the second open-loop power based on the third configuration information sent by the base station.

It should be noted that, in the embodiment of the present invention, when a new round of random access process is performed, the configuration information received by the terminal will change, and because the signal path loss is different, the third configuration information obtained based on the third configuration information will change. The second open loop power may also be different from the first open loop power.

Exemplarily, as mentioned above, in the previous random access procedure, the first open-loop power of the terminal is P, and in this new random access procedure, the second open-loop power of the terminal may be P1. .

S107. Accumulate a preset power accumulation factor for the second open-loop power to obtain a second accumulated power.

In the embodiment of the present invention, after acquiring the second open-loop power, the terminal accumulates a preset power accumulation factor to obtain the second accumulated power.

It should be noted that, in the embodiment of the present invention, the terminal uses the first accumulated power to complete a random access process in the previous random access process, indicating that the preset power accumulation factor may be a more appropriate requirement on the channel If the power is increased, then, when performing the next random access process, the terminal adopts the preset power accumulation factor in the previous random access process in the initial transmission to ensure the success rate of the terminal's next access.

Exemplarily, when the preset power accumulation factor is K, and the terminal successfully completes a random access procedure after retransmitting the first connection retransmission request with the first accumulated power P+K, when the terminal accesses again, the terminal's The initial transmission power is the second accumulated power after a preset power accumulation factor is accumulated on the second open-loop power obtained based on the third configuration information. That is, when the second open-loop power of the terminal is P1, the second accumulated power is P1+K.

S108. Send a second connection request by using the second accumulated power.

In the embodiment of the present invention, after obtaining the second accumulated power, the terminal sends the second connection request according to the second accumulated power.

It should be noted that, in the embodiment of the present invention, when the terminal performs a new random access process, the terminal will use the second accumulated power to send a second connection request during initial transmission, so as to ensure the success rate of the new random access process .

S109: Complete the current random access process according to the second connection request.

In the embodiment of the present invention, after the terminal sends the second connection request and receives the third conflict resolution message fed back by the base station and feeds back the connection confirmation message, the current random access process is completed.

Further, in the embodiment of the present invention, when monitoring the reception of a second conflict resolution message fed back by the base station to the first connection retransmission request, the terminal sends a connection confirmation message according to the second conflict resolution message , after completing a random access process, the method further includes: when a preset condition is reached, in each random access process, reducing the previous preset power accumulation factor to obtain the current preset power accumulator; wherein, the preset power accumulator is obtained. The conditions are set to indicate that within the preset random access times threshold, the open-loop power of the user can be increased by the preset power accumulation factor each time, and the random access process can be completed at one time; the lower limit of the current preset power accumulator is 0; The current preset power accumulator is accumulated on the basis of the open-loop power to complete the current random access process.

It should be noted that, in the embodiment of the present invention, when the preset condition is satisfied, the terminal decrements the preset power accumulation factor to perform a new random access process, that is, the terminal monitors each time within the preset random access times threshold range. In the random access process, after accumulating the preset power accumulation factor on the basis of the current own open-loop power, it can receive the conflict resolution message fed back by the base station after sending the connection request, that is, it does not occur within the threshold range of the number of consecutive preset random access times. Retransmission, indicating that the power of the uplink transmission channel may be large enough. At this time, in order to avoid the terminal occupying too much channel resources and affecting the access of other terminals, it is necessary to gradually try to reduce the transmission power of the terminal in the subsequent random access process. , that is, gradually reduce the previous preset power accumulation factor to obtain the current preset power accumulation factor. In each random access process, the terminal accumulates the current preset power accumulator on the basis of its own open-loop power to complete the current random access procedure.

Exemplarily, when the preset random access times threshold is 3 times, and the preset power accumulation factor is K, if the random access process can be successfully completed at one time after accumulating K based on the open-loop power for 3 consecutive times, Then in each subsequent random access process, the current preset power accumulation factor accumulated by the terminal on the basis of the open-loop power of the current random process is decremented on the basis of the previous preset power accumulation factor. K-1 is K-1 in the first random access process after this time, and the terminal accumulates the current preset power accumulation factor K-1 on the basis of its own open-loop power in this random access process, and completes the current random access process , and in the next random access process, the current preset power accumulation factor K-2 is accumulated on the basis of its own open-loop power to complete the current random access process until K is 0.

It can be understood that, in the embodiment of the present invention, when the terminal does not continuously retransmit under the preset random access times threshold, it means that the power of the current uplink transmission channel is large enough. At this time, the terminal will automatically control to gradually restore to Use open-loop power transmission to further save power consumption during random access.

Embodiment 2

Based on the same inventive concept of Embodiment 1, an embodiment of the present invention provides a random access apparatus 600. FIG. 6 is a diagram of a random access apparatus proposed in an embodiment of the present invention. As shown in FIG. 6, in the present invention In the embodiment, the random access apparatus 600 includes:

A first sending unit 601, configured to send a first connection request by using a first open-loop power based on the first configuration information sent by the base station; wherein, the first open-loop power is a power calculated by using an open-loop power control method;

A confirmation unit 602, configured to confirm entering the retransmission process of the first connection request when the first conflict resolution message fed back by the base station to the first connection request is not monitored, and record the current number of retransmissions;

Accumulation unit 603, configured to increase the first open-loop power according to the current number of retransmissions to obtain a first accumulated power;

The first sending unit 601 is further configured to send a first connection retransmission request by using the first accumulated power when the first accumulated power is less than the preset maximum power;

The second sending unit 604 is configured to, when monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, send a connection confirmation message according to the second conflict resolution message to complete a random access process.

In other embodiments, the first sending unit 601 is configured to receive the first configuration information sent by the base station; send a first random access preamble message according to the first configuration information; receive the base station Based on the first random access response sent by the first random access preamble message, the first random access response carries the first resource repetition times; the first resource repetition times represents the repeated transmission times of resources; The first open-loop power is obtained according to the number of repetitions of the first resource; and the first connection request is sent by using the first open-loop power.

In other embodiments, the accumulating unit 603 is configured to, when the current number of retransmissions does not exceed a preset number of retransmissions threshold, accumulate a preset amount of the first open-loop power according to the current number of retransmissions The power accumulation factor is used to obtain the first accumulated power.

In other embodiments, the accumulating unit 603 is configured to, when the current number of retransmissions does not exceed a preset threshold of the number of retransmissions, according to the corresponding relationship between the preset power accumulation factor and the number of retransmissions, and the current retransmission times The number of transmissions is determined, and the preset power accumulation factor is determined; the corresponding relationship between the preset power accumulation factor and the number of retransmissions indicates that the preset power accumulation factor is positively correlated with the number of retransmissions; The loop power accumulates the preset power accumulation factor to obtain the first accumulated power.

In other embodiments, when the first conflict resolution message fed back by the base station to the first connection request is not monitored, it is confirmed to enter the retransmission process of the first connection request, and after recording the current number of retransmissions, The first sending unit 601 is further configured to use the preset maximum power to send the first connection retransmission request when the current number of retransmissions exceeds a preset threshold of the number of retransmissions.

In other embodiments, after increasing the first open-loop power according to the current number of retransmissions to obtain the first accumulated power, the first sending unit 601 is further configured to, when the first accumulated power is greater than or equal to the When the preset maximum power is used, the first connection retransmission request is sent with the preset maximum power.

In other embodiments, the accumulating unit 603 is configured to acquire the current channel environment; when the current retransmission times does not exceed the preset retransmission times threshold, set the preset power accumulation according to the channel environment factor; wherein, the channel environment includes an indoor environment or an outdoor environment, and the preset power accumulation factor corresponding to the outdoor environment is set to be greater than the preset power accumulation factor corresponding to the indoor environment;

According to the current number of retransmissions, the preset power accumulation factor is accumulated for the first open-loop power to obtain the first accumulated power.

In other embodiments, when the first accumulated power is less than the preset maximum power, after sending the first connection retransmission request by using the first accumulated power, the first sending unit 601 is further configured to: If the terminal monitors and does not receive the second conflict resolution message fed back by the base station to the first connection retransmission request, and the current number of retransmissions is greater than the preset number of retransmissions threshold, the terminal receives the first random access Second configuration information, start the next random access process.

In other embodiments, when monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, send a connection confirmation message according to the second conflict resolution message to complete a random After the access process, the first sending unit 601 is further configured to reduce the previous preset power accumulating factor in each random access process when the preset condition is reached, and obtain the current preset power accumulating factor. ; wherein, the preset condition indicates that the random access process can be completed once by using the preset power accumulation factor to increase its own open-loop power within the preset random access times threshold; the current preset power accumulator The lower limit of is 0; the current preset power accumulator is accumulated on the basis of its own open-loop power to complete the current random access process.

The description of the apparatus embodiment of the present invention is similar to the description of the method embodiment in the above-mentioned first embodiment, and has similar beneficial effects as the method embodiment. For technical details not disclosed in the apparatus embodiments of the present invention, please refer to the description of the method embodiments of the present invention to understand.

Embodiment 3

Based on the same inventive concept of Embodiment 1, FIG. 7 is a schematic diagram of the composition and structure of a terminal proposed by an embodiment of the present invention. As shown in FIG. 7 , the terminal proposed by the present invention may include a processor 01 and store the processor 01 executable. A memory 02 for instructions, a communication interface 03, and a bus 04 for connecting the processing 01, the memory 02, and the communication interface 03. Wherein, the processor 01 is used for executing the random access program stored in the memory to realize the following steps:

Based on the first configuration information sent by the base station, the first connection request is sent by using the first open-loop power; wherein, the first open-loop power is the power calculated by using the open-loop power control method;

When the first conflict resolution message fed back by the base station to the first connection request is not monitored, confirm to enter the retransmission process of the first connection request, and record the current number of retransmissions;

Raise the first open-loop power according to the current number of retransmissions to obtain a first accumulated power;

When the first accumulated power is less than the preset maximum power, use the first accumulated power to send a first connection retransmission request;

When monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, according to the second conflict resolution message, a connection confirmation message is sent to complete a random access process.

In the embodiment of the present invention, the above-mentioned processor 01 may be an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), or a Digital Signal Processing Device (DSPD) , at least one of a programmable logic device (ProgRAMmable Logic Device, PLD), a field programmable gate array (Field ProgRAMmable GateArray, FPGA), a CPU, a controller, a microcontroller, and a microprocessor. It can be understood that, for different devices, the electronic device used to implement the function of the processor may also be other, which is not specifically limited in this embodiment of the present invention. The terminal may also include a memory 02, which may be connected to the processor 01, wherein the memory 02 is used for storing random access program codes, the program codes including computer operation instructions, the memory 02 may include high-speed RAM memory, or may also Include non-volatile memory, eg, at least two disk drives.

In practical applications, the above-mentioned memory 02 may be a volatile memory (volatile memory), such as a random-access memory (Random-Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read-only memory (Read-Only Memory, ROM), flash memory (flash memory), hard disk (Hard DiskDrive, HDD) or solid-state drive (Solid-State Drive, SSD); or a combination of the above types of memory, and provide the processor 01 with instructions and data.

In addition, each functional module in this embodiment may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or can be implemented in the form of software function modules.

If the integrated unit is implemented in the form of software function modules and is not sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this embodiment is essentially or correct. Part of the contribution made by the prior art or all or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, and includes several instructions to make a computer device (which can be a personal A computer, a server, or a network device, etc.) or a processor (processor) executes all or part of the steps of the method in this embodiment. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (Read Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes.

It can be understood that, in the embodiment of the present invention, the terminal adopts the method of autonomously increasing the power, which saves the time consumed by the terminal for random access, and on this basis, saves the power consumption during random access of the terminal, and improves the performance of the terminal. The random access success rate improves customer satisfaction.

An embodiment of the present invention provides a computer-readable storage medium on which a random access program is stored, which is applied in a terminal, and when the program is executed by a processor, implements the method in the first embodiment.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present invention is described with reference to schematic flowcharts and/or block diagrams of implementations of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It will be understood that each process and/or block in the schematic flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the schematic flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a process or processes and/or a block or blocks in the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions An apparatus implements the functions specified in a flow or flows of the implementation flow diagram and/or a block or blocks of the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the implementing flow diagram and/or the block or blocks of the block diagram.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (12)

1. A random access method, characterized in that, applied to a terminal, the method comprising: Based on the first configuration information sent by the base station, the first connection request is sent by using the first open-loop power; wherein, the first open-loop power is the power calculated by using the open-loop power control method; When the first conflict resolution message fed back by the base station to the first connection request is not monitored, confirm to enter the retransmission process of the first connection request, and record the current number of retransmissions; Raise the first open-loop power according to the current number of retransmissions to obtain a first accumulated power; When the first accumulated power is less than the preset maximum power, use the first accumulated power to send a first connection retransmission request; When monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request, according to the second conflict resolution message, a connection confirmation message is sent to complete a random access process. 2. The method according to claim 1, wherein the sending the first connection request using the first open-loop power based on the first configuration information sent by the base station comprises: receiving the first configuration information sent by the base station; sending a first random access preamble message according to the first configuration information; Receive a first random access response sent by the base station based on the first random access preamble message, where the first random access response carries a first number of resource repetitions; the first resource repetition number represents a resource Repeat transmission times; obtaining a first open-loop power according to the number of repetitions of the first resource; The first connection request is sent using the first open-loop power. 3. The method according to claim 1, wherein the step of increasing the first open-loop power according to the current number of retransmissions to obtain the first accumulated power comprises: When the current number of retransmissions does not exceed a preset number of retransmissions threshold, according to the current number of retransmissions, a preset power accumulation factor is accumulated for the first open-loop power to obtain the first accumulated power. 4 . The method according to claim 3 , wherein when the current number of retransmissions does not exceed a preset number of retransmissions threshold, according to the current number of retransmissions, the first open-loop power Accumulating a preset power accumulation factor to obtain the first accumulated power, including: When the current number of retransmissions does not exceed the preset number of retransmissions threshold, the preset power accumulation factor is determined according to the corresponding relationship between the preset power accumulation factor and the number of retransmissions, and the current number of retransmissions; The corresponding relationship between the preset power accumulation factor and the number of retransmissions represents that the preset power accumulation factor is positively correlated with the number of retransmissions; The preset power accumulation factor is accumulated for the first open-loop power to obtain the first accumulated power. 5 . The method according to claim 1 , wherein when the first conflict resolution message fed back by the base station to the first connection request is not monitored, confirming the re-entry of the first connection request. 6 . After recording the current number of retransmissions, the method further includes: When the current number of retransmissions exceeds a preset number of retransmissions threshold, the first connection retransmission request is sent using the preset maximum power. 6. The method according to claim 1, wherein after the first open-loop power is obtained according to the current number of retransmissions to obtain the first accumulated power, the method further comprises: When the first accumulated power is greater than or equal to the preset maximum power, the first connection retransmission request is sent by using the preset maximum power. 7 . The method according to claim 3 , wherein when the current number of retransmissions does not exceed a preset number of retransmissions threshold, according to the current number of retransmissions, the first open-loop power Accumulating a preset power accumulation factor to obtain the first accumulated power, including: Get the current channel environment; When the current number of retransmissions does not exceed the preset number of retransmissions threshold, the preset power accumulation factor is set according to the channel environment; wherein the channel environment includes an indoor environment or an outdoor environment, and the outdoor environment is set. The preset power accumulation factor corresponding to the environment is greater than the preset power accumulation factor corresponding to the indoor environment; According to the current number of retransmissions, the preset power accumulation factor is accumulated for the first open-loop power to obtain the first accumulated power. 8. The method according to claim 1, wherein when the first accumulated power is less than a preset maximum power, using the first accumulated power, after sending a first connection retransmission request, the Methods also include: If the terminal monitors and does not receive the second conflict resolution message fed back by the base station to the first connection retransmission request, and the current number of retransmissions is greater than the preset number of retransmissions threshold, the terminal receives the first random access Second configuration information, start the next random access process. 9 . The method according to claim 8 , wherein when monitoring a second conflict resolution message that is fed back by the base station to the first connection retransmission request, according to the second conflict resolution message. 10 . , sending a connection confirmation message, and after completing a random access process, the method further includes: When the preset condition is reached, in each random access process, the previous preset power accumulation factor is reduced to obtain the current preset power accumulator; wherein the preset condition represents the number of preset random access times Using the preset power accumulating factor to increase its own open-loop power within the threshold can complete the random access process once; the lower limit of the current preset power accumulator is 0; The current preset power accumulator is accumulated on the basis of its own open-loop power to complete the current random access process. 10. A random access device, wherein the device comprises: a first sending unit, configured to send a first connection request by using a first open-loop power based on the first configuration information sent by the base station; wherein, the first open-loop power is a power calculated by using an open-loop power control method; A confirmation unit, configured to confirm entering the retransmission process of the first connection request when the first conflict resolution message fed back by the base station to the first connection request is not monitored, and record the current number of retransmissions; an accumulating unit, configured to increase the first open-loop power according to the current number of retransmissions to obtain a first accumulated power; The first sending unit is further configured to send a first connection retransmission request by using the first accumulated power when the first accumulated power is less than the preset maximum power; a second sending unit, configured to send a connection confirmation message according to the second conflict resolution message when monitoring and receiving a second conflict resolution message fed back by the base station to the first connection retransmission request to complete a random connection into the process. 11. A terminal, characterized in that the terminal at least comprises: a processor, a memory, a communication interface, and a bus for connecting the processor, the memory, and the communication interface; the processor is used to execute the execution in the memory. A stored random access procedure to implement the method of any of claims 1-9. 12. A computer-readable storage medium on which a random access program is stored, applied in a terminal, and when the random access program is executed by a processor, the method according to any one of claims 1-9 is implemented .

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