CN117222038A - Power communication terminal network random access method and related device - Google Patents

Abstract

The invention belongs to the field of power automation, and discloses a power communication terminal network random access method and a related device, wherein when a random access lead code needs to be sent in the random access process, a special random access lead code of a power communication terminal is selected from a plurality of special random access lead codes of the power communication terminal reserved in all the random access lead codes, and is used as a target random access lead code to be sent to a base station; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, and the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI. The base station can be adaptively configured according to the characteristics of the power communication terminal, differentiated services can be better provided for the power industry, and the power industry can also better assist the 5G fusion development.

Description

Power communication terminal network random access method and related device

Technical Field

The invention belongs to the field of power automation, and relates to a power communication terminal network random access method and a related device.

Background

The wireless communication of electric power has higher requirements on safety, reliability and isolation. Based on the existing spectrum strategy, the power field can only use a public network system provided by an operator, and in order to meet the power application requirements, a power virtual special network can be established through a virtualization technology. However, for a long time, the control services of electric power are limited by reasons such as time delay, communication reliability and physical isolation, and most of the control services still adopt a wired communication mode such as optical fiber.

The fifth generation mobile communication system (5G) is a new generation cellular mobile communication technology, and can provide a user experience rate of 10 times of 4G, a peak rate of up to 20Gbps, a null delay of as low as 1ms, an ultra-high reliability of 99.999%, and a terminal connection density of 100 tens of thousands per square kilometer. Along with the rising of 5G slicing technology and the development trend of a novel power system, scenes such as distributed photovoltaic, micro-grid and the like all need to participate in group policy group control, and are limited by factors such as optical fiber communication cost, 5G slicing becomes a better choice. The demand for communication in the development of the power industry is highly compatible with the characteristics of 5G communication. The diversified demands of the power service also urgently require wireless access, real-time interaction and deep perception of various devices in the whole links of power production and operation to be realized through a 5G network, intelligent upgrading of the power grid service is realized, and development of the power emerging service is promoted.

At present, when a power service terminal is accessed to a 5G network through a 5G communication module/communication terminal (hereinafter referred to as a power communication terminal), most of the scenes are that the power service terminal shares one network with a ToC user, and the 5G network cannot distinguish the type of the accessed power communication terminal, so that inconvenience is brought to some special applications of power. Such as: most of the power communication terminals do not need to move, do not need to communicate by voice, and do not need to transmit with ultra-high bandwidth; in addition, even the power communication terminal has higher requirements on low power consumption and low cost and medium requirements on high reliability and high safety for data acquisition scenes; for control scenes, the communication terminal has higher requirements on high reliability, high safety and low time delay. Because the base station side cannot identify the power communication terminal, some network functions cannot customize services according to the characteristics of the communication terminal, which specifically includes:

1) In the random access stage, all different communication terminals compete for random access resources, the collision probability is high, and the physical isolation requirement of the power control service is not met.

2) The 5G makes some improvements on the security, but in reality, due to the increase of the transmission delay of the user caused by the high security policy, operators do not open all the security measures, if the identity of the user is identified, the security policy can be opened for part of the users, or the selection right is given to the user, and customization is performed according to the selection of the user, so that the confidence of the industry user on the security of the 5G network is improved.

3) 90% of the power communication terminal users are stationary and do not need to move, but the base station may periodically measure the configuration terminal, and for a communication terminal without a handover requirement, the power consumption of the communication terminal will be increased.

4) In the current 5G network, when a user does not have data transmission within a certain time, the user enters an inactive state or an idle state according to a policy, and when the user has a transmission requirement, an additional signaling flow is needed to resume data transmission, which additionally increases the transmission delay of the user.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a random access method and a related device for a power communication terminal network.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

the first aspect of the present invention provides a method for random access to a power communication terminal network, comprising:

when a random access preamble is required to be sent in the random access process, selecting one special random access preamble of the electric power communication terminals from a plurality of special random access preambles of all the random access preambles, and sending the special random access preamble as a target random access preamble to a base station; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, and the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI.

Optionally, selecting one power communication terminal dedicated random access preamble from the plurality of power communication terminal dedicated random access preambles reserved in all the random access preambles, and sending the selected power communication terminal dedicated random access preamble to the base station as the target random access preamble includes:

setting the numbers of the special random access lead codes of a plurality of electric power communication terminals reserved in all the random access lead codes as (Q-N) to Q-1; wherein Q is the total number of the system random access preambles, and N is the total number of the special random access preambles of the power communication terminal;

selecting a special random access lead code of the power communication terminal with the number of (Q-N+n), and sending the special random access lead code to a base station as a target random access lead code; wherein N is an integer of 0 or more and less than N.

Optionally, n=mod (M, N), mod represents a complementary function, and M is the power communication terminal identification number.

Optionally, in a random access response receiving window, when at least two pieces of random access response information exist at the same time, the base station packages the random access response information of the power communication terminal-specific random access preamble sent by the power communication terminal into one data packet to be sent.

Optionally, when the power communication terminal-specific random access preamble is used for a contention random access procedure and a non-contention random access procedure of the power communication terminal, the power communication terminal stores a plurality of power communication terminal-specific random access preambles; when the special random access preamble code of the power communication terminal is only used for the competition random access process of the power communication terminal, and the base station can select other random access preamble codes to be configured to the power communication terminal in the non-competition random access process of the power communication terminal, the power communication terminal stores all random access preamble codes.

Optionally, the method further comprises:

and reserving a plurality of special random access lead codes for the power communication terminals in all random access lead codes by adopting a protocol agreed mode or a signaling parameter mode by a base station.

Optionally, the target random access preamble is used for triggering the base station to send random access response information scrambled by the power terminal RA-RNTI;

the power communication terminal network random access method further comprises the following steps: when the random access response information needs to be descrambled in the random access process, generating the RA-RNTI of the power terminal according to the RA-RNTI generating rule of the power terminal, and descrambling the random access response information according to the RA-RNTI of the power terminal.

Optionally, the generating the RA-RNTI of the power terminal according to the RA-RNTI generation rule of the power terminal includes:

when the random access network is a 5G NR network and the power communication terminal adopts four-step random access, the power terminal RA-RNTI generation rule is as follows: the power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+32768, or the power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+ (RAPID < < 16);

wherein s_id represents the 1 st OFDM symbol index of PRACH sending time, and the value is 0-13; when the subcarrier interval is 480kHz or 960kHz, t_id represents the time slot index of 120kHz in a system frame containing PRACH transmission time, the value is 0-79, otherwise, t_id represents the 1 st time slot index of PRACH transmission time in a system frame, and the value is 0-79; f_id represents an index of PRACH transmission time on a frequency domain, and the value is 0-7 according to the sequence from low frequency to high frequency; ul_carrier_id represents an uplink carrier transmitted by the random access preamble, a value of 0 represents a normal uplink carrier, and a value of 1 represents an auxiliary uplink carrier; x represents a multiplication symbol; < represents a left shift, (RAPID < < 16) represents a left shift of RAPID by 16 bits, RAPID represents a preamble index transmitted by the power terminal;

When the random access network is a 5G NR network and the power communication terminal adopts two-step random access, the generation rule of the RA-RNTI of the power terminal is as follows: power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2+

(RAPID<<16)；

When the random access network is a 4G network, the power terminal RA-RNTI generation rule is mode 1, mode 2, or mode 3:

mode 1: electric terminal RA-rnti= ((1+t_id) _4G +10×f_id _4G )<<6)+RAPID

Mode 2: electric power terminal RA-rnti=1+t_id _4G +10×f_id _4G +64

Mode 3: electric power terminal RA-rnti=1+t_id _4G +10×f_id _4G +(RAPID)<<6

Wherein t_id _4G A first subframe index representing the transmitted PRACH, the value of which is 0-9; f_id _4G Representing the index of PRACH transmitted on the same subframe on the frequency domain, and taking the value of 0-5 according to the sequence from low frequency to high frequency;<<6 denotes a shift to the left by 6 bits.

Optionally, the method comprises the following steps:

generating a plurality of random access leading codes, selecting one special random access leading code of the electric power communication terminal from the reserved random access leading codes of a plurality of electric power communication terminals, and sending the special random access leading code to a base station as a target random access leading code;

transmitting the target random access preamble to the base station; the target random access lead code is used for indicating the current random access terminal of the base station to be the power communication terminal and triggering the base station to send random access response information scrambled through the RA-RNTI of the power terminal, wherein the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and the TC-RNTI;

Receiving random access response information, descrambling through an RA-RNTI of the power terminal, and sending msg3 information scrambled through the TC-RNTI to a base station according to an uplink time advance, an uplink scheduling transmission resource indication and the TC-RNTI in the random access response information when the random access response information contains an index value of a target random access preamble; the msg3 information is used for triggering a base station to descramble through the TC-RNTI, and sending contention resolution information which is scrambled through the C-RNTI and contains the user initial identification of the power communication terminal; the msg3 information comprises an RRC connection establishment request message, wherein the RRC connection establishment request message comprises a user initial identifier of the power communication terminal;

and receiving the competition-solving message and descrambling through the C-RNTI, and accessing the power communication terminal into the network when the competition-solving message contains the initial identification of the user of the power communication terminal.

In a second aspect of the present invention, there is provided a power communication terminal network random access system, comprising:

the system comprises a preamble code sending module, a base station and a random access preamble code sending module, wherein the preamble code sending module is used for selecting one special random access preamble code of the power communication terminals from a plurality of special random access preamble codes reserved in all the random access preamble codes when the random access preamble codes need to be sent in the random access process, and sending the special random access preamble code of the power communication terminals to the base station as a target random access preamble code; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, and the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI.

Optionally, the target random access preamble is used for triggering the base station to send random access response information scrambled by the power terminal RA-RNTI;

the power communication terminal network random access system further includes: and the random access response module is used for generating the RA-RNTI of the power terminal according to the RA-RNTI generation rule of the power terminal when the random access response information needs to be descrambled in the random access process, and descrambling the random access response information according to the RA-RNTI of the power terminal.

In a third aspect of the present invention, there is provided a computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the above-described power communication terminal network random access method when executing the computer program.

In a fourth aspect of the present invention, there is provided a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the above-described power communication terminal network random access method.

Compared with the prior art, the invention has the following beneficial effects:

according to the network random access method of the power communication terminal, the special random access lead codes of the power communication terminals are reserved in all the random access lead codes, then when the random access lead codes are required to be sent in the random access process, the special random access lead codes of the power communication terminals are selected from the special random access lead codes of the power communication terminals and are sent to the base station as target random access lead codes, and based on the random access lead codes, when the random access lead codes are detected at the base station side, if the detected random access lead codes are reserved for the power terminals, the current terminal can be judged to be the power communication terminal, accurate identification of the power communication terminals is realized, the base station can carry out adaptive configuration according to the characteristics of the power communication terminals, differentiated services can be better provided for the power industry, and the power industry can also better assist 5G fusion development.

Furthermore, the random access response information is scrambled and descrambled through the RA-RNTI of the power terminal, so that isolation of transmission resources in the random access process is realized, and the application scene of the power communication terminal is adapted.

Drawings

Fig. 1 is a flowchart of a method for random access to a power communication terminal network according to an embodiment of the present invention.

Fig. 2 is a detailed flowchart of a network random access method of a power communication terminal according to an embodiment of the present invention.

Fig. 3 is a block diagram of a power communication terminal network random access system according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The invention is described in further detail below with reference to the attached drawing figures:

referring to fig. 1, in an embodiment of the present invention, a network random access method of an electric power communication terminal is provided, based on which a base station side can identify an electric power communication terminal, so that some network functions can perform customized services for characteristics of the electric power communication terminal.

Specifically, the random access method for the electric power communication terminal network comprises the following steps:

s1: when the random access lead code needs to be sent in the random access process, selecting one special random access lead code of the power communication terminals from a plurality of special random access lead codes of the power communication terminals reserved in all the random access lead codes.

S2: and sending the selected special random access lead code of the power communication terminal to the base station as a target random access lead code.

The target random access preamble is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, wherein the random access response information comprises an index value of the target random access preamble, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI.

Specifically, in a mobile communication system, random access is indispensable, a communication terminal completes downlink synchronization through a cell search process, receives broadcast information, and after obtaining a base station configuration parameter, completes uplink synchronization through a random access process, so that data transmission with a base station can be continued.

The following describes the random access procedure for 4G networks (LTE) and 5G networks (5 GNR).

First, a random access preamble generation procedure is described.

In LTE and 5GNR, the number of random access preambles corresponding to each cell is 64, regardless of which preamble format the base station configures the cell to use. For a communication terminal, the generation formula of the random access preamble is as follows:

x _u,v (n)＝x _u ((n+C _v )modL _RA )

wherein L is _RA For the preamble sequence length, u is the root of the generated preamble, C _v For the cyclic shift values of the sequence, u and C _v Is configured by the base station directly or indirectly to the communication terminal through the system information.

Each base station supports 64 random access preambles, so that the communication terminal can generate 64 random access preambles in advance, and when the random access preambles need to be transmitted, the communication terminal selects the corresponding random access preambles to transmit according to policies of contention random access and non-contention random access. If the communication terminal generates the random access preamble x through the above formula _u,v (n) less than 64, the same procedure is continued using the next root sequence until 64 random access preambles are generated.

Next, a format of the random access preamble will be described.

According to different communication modes and subcarrier intervals and different requirements of cell coverage radius, the base station can configure the communication terminal to adopt different formats.

For LTEFDD cell, the random access preamble can support 4 preamble formats, corresponding to L _RA =839, formats 0 to 3 correspond to different cell coverage radii; for LTETDD cell, the random access preamble can support 5 preamble formats, format 0-3 corresponds to L _RA =839, form 4 corresponds to L _RA ＝139。

For 5GNR cell, 13 preamble formats are supported, when the subcarrier spacing is 1.25KHz or 5MHz, 4 preamble formats 0-3 can be supported, corresponding L _RA =839; when the subcarrier interval is 15KHz, 30KHz, 60KHz, 120KHz, 480KHz or 960KHz, 9 preamble formats can be supported, namely A1-3, B1-4, C0 and C2, respectively, corresponding L _RA =139; when the subcarrier spacing is 15KHz or 120KHz, 9 preamble formats can be supported, corresponding L _RA =1151; when the subcarrier interval is 30KHz, 120KHz or 480KHz, 9 preamble formats can be supported, corresponding L _RA =571; for simplicity of description, for a 5GNR cell, only the following cases are considered: when the subcarrier spacing is 1.25KHz or 5MHz, 4 preamble formats can be supported, corresponding L _RA =839; when the subcarrier interval is 15KHz, 30KHz, 60KHz or 120KHz, 9 preamble formats can be supported,corresponding L _RA ＝139。

Next, time-frequency resources for random access preamble transmission are described.

In the lteddd, there are only 1 PRACH (Physical Random Access Channel ) resource in the frequency domain; in the time domain, different preamble formats correspond to different transmission occasions and transmission densities, and even though the same preamble format is used, the base station can configure the transmission occasions and transmission densities that are not used, if the configuration is used, each subframe has the opportunity of transmitting the preamble, but if the configuration is used, only 1 subframe has the opportunity of transmitting the preamble in two radio frames.

In LTETDD, TDD uplink resources are sparse compared with FDD (time division multiplexing, most resources are distributed to downlink), and in order to realize PRACH capacity similar to FDD, TDD increases PRACH resources through frequency multiplexing, and the same subframe has 6 PRACH resources at most; therefore, the base station defines the preamble transmission time-frequency resource by configuring the preamble transmission density and the preamble transmission quadruple, and transmits several preambles on a specific frequency domain, which is determined by the communication terminal according to the configuration parameters, and will not be described in detail herein.

For a 5GNR cell, both the frequency domain resources and the time domain resources are similarly configured by the base station.

Then, RA-RNTI (radio network temporary identity for msg2 scrambling in the random access procedure) in the random access procedure will be described.

In LTE, RA-rnti=1+t_id+10×f_id. Wherein, t_id represents the index (namely the subframe number) of the first subframe (in one system frame) of the PRACH, and the value is 0-9; f_id represents indexes of different PRACH sending occasions on the same subframe on a frequency domain, and the indexes take values of 0-5 according to the sequence from the small frequency to the large frequency.

In 5GNR, four-step random access RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id. Wherein s_id represents the index of the 1 st OFDM symbol (in one PRACH opportunity), and the value is 0-13; when the subcarrier interval is 480kHz or 960kHz, t_id represents the time slot index of 120kHz in a system frame containing PRACH transmission time, the value is 0-79, otherwise, t_id represents the 1 st time slot index of PRACH transmission time in a system frame, and the value is 0-79; f_id represents the index of PRACH opportunity on the frequency domain, and the value is 0-7; ul_carrier_id represents an uplink carrier transmitted by the PRACH, a value of 0 represents a normal uplink carrier, and a value of 1 represents a secondary uplink carrier.

When the random access network is a 5G NR network and the power terminal adopts two-step random access, RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2, where s_id represents an index of the 1 st OFDM symbol (in one PRACH occasion) and takes a value of 0 to 13; when the subcarrier interval is 480kHz or 960kHz, t_id 'represents the time slot index of 120kHz in a system frame containing PRACH transmission time, the value is 0-79, otherwise, t_id' represents the 1 st time slot index of PRACH transmission time in a system frame, and the value is 0-79; f_id' represents the index of PRACH opportunity on the frequency domain, and the value is 0-7; ul_carrier_id represents an uplink carrier transmitted by the PRACH, a value of 0 represents a normal uplink carrier, and a value of 1 represents a secondary uplink carrier.

As can be seen from the above analysis, although there are only 64 random access preambles per cell, the 64 random access preambles can be multiplexed as long as the transmission time-frequency resource positions of the random access preambles are different, that is: assuming that there are M different time-frequency resources in the random access preamble transmission period, the non-conflicting random access preamble format in the period is 64×m.

Whereas a plurality of communication terminals may transmit random access preambles in the same RACH (random access channel) time-frequency resource, their random access response messages will all be transmitted after being scrambled by the same RA-RNTI, i.e. the Random Access Responses (RARs) of a plurality of communication terminals may be carried in a single data (they correspond to different communication terminals initiating a random access procedure in the same RACH opportunity).

Then, the steps of the random access procedure are explained.

Random access is classified into contention random access and non-contention random access.

In LTE and release 5GR15, the contention random access includes four steps, but according to different scenarios of triggering the random access, the contents carried in the messages of the four steps are different, and the following is taken as an example of initial random access:

1) The communication terminal randomly selects a preamble sequence, sends a random access preamble to the base station on the PRACH channel, if a plurality of preamble sending occasions exist, the communication terminal randomly selects a sending occasion according to the self strategy, the sending occasion of the communication terminal determines the value of the RA-RNTI, and if the sending occasions of the plurality of communication terminals are the same, and the same random access preamble is selected, the collision occurs.

2) The base station performs random access preamble blind monitoring on all transmission occasions of the random access preamble, if the base station detects the random access preamble, the base station acquires a corresponding RA-RNTI according to the detected transmission (or base station receiving) occasion of the communication terminal of the random access preamble, then uses the RA-RNTI to perform physical layer scrambling on a PDCCH and a PDSCH channel of a random access response message, and transmits the random access response message in a random access response window, wherein the random access response message possibly comprises a plurality of random access responses, and each random access response comprises an index value of the random access preamble, an uplink scheduling transmission resource indication, a TC-RNTI (random access temporary identifier) and the like.

3) The communication terminal receives the random access response message, and if the index value of the random access preamble sequence or the RA-RNTI is inconsistent with the index value sent by the communication terminal side, the communication terminal considers that the communication terminal does not receive the random access response message, and the communication terminal repeats the step 1) under the condition; if the index value of the random access preamble sequence is consistent with the RA-RNTI sent by the communication terminal side, the communication terminal considers that the random access response message is received, and after scrambling uplink scheduling transmission msg3 information by using the TC-RNTI carried in the random access response message, the communication terminal sends the msg3 information according to the uplink scheduling transmission resource indication; for the initial random access scenario, msg3 information carries an RRC (radio resource control) connection establishment request message, which contains a user initial identity.

4) After receiving the msg3 information and using TC-RNTI to descramble correctly, the base station upgrades the TC-RNTI into C-RNTI (random access identifier) of the communication terminal, and sends the competition solving msg4 information to the communication terminal, wherein the msg4 information carries the initial identifier of the user carried by the msg3 information; and the communication terminal receives the msg4 information, and if the user initial identification in the demodulated msg4 information is consistent with the user initial identification sent by the communication terminal in the msg3 information, the communication terminal considers that the random access is completed.

In version 5GR16, 2-step contention random access is newly defined, that is, the communication terminal and the base station side only need two messages MsgA and MsgB to complete the contention random access procedure. Simple understanding: the MsgA contains a preamble and payload, msg1+msg3 in a 4-step random access procedure, the MsgB contains an MsgB PDCCH and an MsgB PDSCH, and the content carried in the PDSCH is similar to the original msg2+msg4. In general, the non-contention random access includes two steps, and the 2-step random access defined in the 5GR16 version is used only for the cell handover scenario, and only the non-contention random access procedures msg1 and msg2 are described below, excluding the msgA and msgB defined in the 5GR 16:

1) The communication terminal uses the preamble sequence index configured by the base station to send the preamble to the base station on the PRACH channel, if a plurality of preamble sending occasions exist, the communication terminal selects one sending occasion according to the self strategy or randomly, and the sending occasion of the communication terminal determines the value of the RA-RNTI, and the preamble resources of the competitive random access and the non-competitive random access configured by the base station are not overlapped under most scenes, so the non-competitive random access collision probability is low.

2) The base station performs blind monitoring on all sending occasions of the random access preamble, if the base station detects the random access preamble, the base station acquires a corresponding RA-RNTI according to the detected sending (or receiving) occasion of the communication terminal of the random access preamble, then performs physical layer scrambling on a PDCCH and a PDSCH channel of a random access response message by using the RA-RNTI, sends the random access response message in a random access response window, and indicates the resource position, the modulation coding mode and the like of the next uplink message sending of the communication terminal.

According to the power communication terminal network random access method, through the plurality of power communication terminal special random access preambles reserved in all the random access preambles, then when the random access preambles need to be sent in the random access process, a power communication terminal special random access preamble is selected from the power communication terminal special random access preambles and is used as a target random access preamble to be sent to a base station, when the random access preamble is detected at the base station side, if the detected random access preamble is reserved for the power terminal, the current terminal can be judged to be the power communication terminal, accurate identification of the power communication terminal is realized, the base station can carry out adaptive configuration according to the characteristics of the power communication terminal, differentiated services can be better provided for the power industry, and the power industry can also better assist 5G fusion development. Meanwhile, the random access response information is scrambled through the RA-RNTI of the power terminal, so that isolation of transmission resources in the random access process is realized, and the application scene of the power communication terminal is adapted.

Specifically, when the specific random access preamble of the power communication terminal is selected from the specific random access preambles of the power communication terminals reserved in all the random access preambles and is used as the target random access preamble to be sent to the base station, the specific random access preamble of the power communication terminal can be randomly selected from the specific random access preambles of the power communication terminals to be used as the target random access preamble.

Furthermore, in one possible implementation manner, the selecting a power communication terminal-specific random access preamble from the plurality of power communication terminal-specific random access preambles reserved in all the random access preambles and sending the power communication terminal-specific random access preamble to the base station as the target random access preamble includes:

setting the numbers of the special random access lead codes of a plurality of electric power communication terminals reserved in all the random access lead codes as (Q-N) to Q-1; wherein Q is the total number of the system random access preambles, and N is the total number of the special random access preambles of the power communication terminal; selecting a special random access lead code of the power communication terminal with the number of (Q-N+n), and sending the special random access lead code to a base station as a target random access lead code; wherein N is an integer of 0 or more and less than N.

In one possible implementation, where n=mod (M, N), mod represents the remainder function, M is the power communication terminal identification number, such as the IMEI (international mobile equipment identity) number.

In one possible implementation, in a random access response receiving window, when at least two pieces of random access response information exist simultaneously, the base station packages the random access response information of the power communication terminal-specific random access preamble transmitted by the power communication terminal into one data packet to be transmitted.

Optionally, the random access response information of the rest random access preamble codes is packaged in another data packet to be sent.

Specifically, the base station side performs independent transmission for the random access response of the power communication terminal, namely, the random access response message is scrambled by using the power terminal RA-RNTI, even if the base station detects a plurality of random access preambles on the same transmission occasion, the base station only packs the random access response information of the random access preamble reserved by the power communication terminal into one data packet to be transmitted, and in the uplink authorization in the random access response information, the base station allocates independent time-frequency resources for the power communication terminal.

In one possible implementation, when the power communication terminal-specific random access preamble is used for a contention random access procedure and a non-contention random access procedure of the power communication terminal, the power communication terminal stores only a number of power communication terminal-specific random access preambles; when the special random access preamble code of the power communication terminal is only used for the competition random access process of the power communication terminal, and the base station can select other random access preamble codes to be configured to the power communication terminal in the non-competition random access process of the power communication terminal, the power communication terminal only stores all random access preamble codes.

Specifically, when the power communication terminal-specific random access preamble is used for the contention random access process and the non-contention random access process of the power communication terminal, the power communication terminal stores only a plurality of power communication terminal-specific random access preambles, so that the storage space can be effectively saved.

In one possible implementation manner, the power communication terminal network random access method further includes: and reserving a plurality of special random access lead codes for the power communication terminals in all random access lead codes by adopting a protocol agreed mode or a signaling parameter mode by a base station.

In one possible implementation, the target random access preamble is used to trigger the base station to transmit random access response information scrambled by the power terminal RA-RNTI.

The power communication terminal network random access method further comprises the following steps:

s3: when the random access response information needs to be descrambled in the random access process, generating the RA-RNTI of the power terminal according to the RA-RNTI generating rule of the power terminal, and descrambling the random access response information according to the RA-RNTI of the power terminal.

In one possible implementation, the generating the power terminal RA-RNTI according to the power terminal RA-RNTI generation rule includes:

When the random access network is a 5G NR network and the power communication terminal adopts four-step random access, the power terminal RA-RNTI generation rule is as follows: the power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+32768, or the power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+ (RAPID < < 16).

Wherein s_id represents the 1 st OFDM symbol index of PRACH sending time, and the value is 0-13; when the subcarrier interval of the PRACH transmission opportunity is 480kHz or 960kHz, t_id represents the time slot index of 120kHz in a system frame containing the PRACH transmission opportunity, the value is 0-79, otherwise, t_id represents the 1 st time slot index of the PRACH transmission opportunity in a system frame, and the value is 0-79; f_id represents an index of PRACH transmission time on a frequency domain, and the value is 0-7 according to the sequence from low frequency to high frequency; ul_carrier_id represents an uplink carrier transmitted by the random access preamble, a value of 0 represents a normal uplink carrier, and a value of 1 represents an auxiliary uplink carrier; x represents a multiplication symbol; < represents shifting to the left, (RAPID < < 16) represents shifting RAPID to the left by 16 bits, equivalent to multiplying by 2 x 16, i.e., by 65536; RAPID represents a preamble index transmitted by a power terminal.

When the random access network is a 5G NR network and the power communication terminal adopts two-step random access, the generation rule of the RA-RNTI of the power terminal is as follows: power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2+

(RAPID<<16)。

When the random access network is a 4G network, the power terminal RA-RNTI generation rule is mode 1, mode 2, or mode 3:

mode 1: electric terminal RA-rnti= ((1+t_id) _4G +10×f_id _4G )<<6)+RAPID

Mode 2: electric power terminal RA-rnti=1+t_id _4G +10×f_id _4G +64

Mode 3: electric power terminal RA-rnti=1+t_id _4G +10×f_id _4G +(RAPID)<<6

Wherein t_id _4G A first subframe index representing the transmitted PRACH, the value of which is 0-9; f_id _4G Representing the index of PRACH transmitted on the same subframe on the frequency domain, and taking the value of 0-5 according to the sequence from low frequency to high frequency;<<indicating a shift to the left, e.g. a<<b, representing the number a shifted to the left by b bits.

The specific RA-RNTI generation formula is adopted, and is agreed by the network side and the terminal.

The generation formula of the current 4G network RA-RNTI is RA-RNTI=1+t_id _4G +10×f_id _4G According to t_id _4G And f_id _4G In order to distinguish the current 4G network RA-RNTI value range from the current general 4GRA-RNTI value range, the mode 1 is to shift the existing RA-RNTI value by 6 bits leftwards as a whole, namely, the whole is multiplied by 64, and the value of the RAPID transmitted by power is added to realize the distinction of the power RA-RNTI and the 4G existing RA-RNTI; in the mode 2, 64 is added to the whole value of the existing RA-RNTI, so that the distinction between the RA-RNTI of the power terminal and the 4G existing RA-RNTI is realized; mode 3 by shifting the value of the power transmitted RAPID to the left by 6 to And multiplying 64, and adding the multiplied value with the existing RA-RNTI value to realize the distinction between the RA-RNTI of the power terminal and the 4G existing RA-RNTI.

Specifically, in the existing RA-RNTI generation formula, an electric power communication terminal identifier is introduced, a new RA-RNTI formula is customized for the electric power communication terminal, and isolation of transmission resources in the random access process is achieved.

In this embodiment, 64 random access preambles are described as an example.

The configuration mode of the LTE random access preamble code is as follows:

1) The base station configures the number n of contention random access Preambles to the communication terminal through the numberOfRA-preamplles parameter in the RACH-ConfigCommon information unit, wherein n=4, 8, 12, … …, and the number of non-contention random access Preambles is 64-n. 2) Optionally, the base station may configure the number m of contention random access preambles GroupA to the communication terminal through the sizeOfRA-preambiresgroupa parameter in the RACH-ConfigCommon information element, where m=4, 8, 12, … … 60, and then the number n-m of contention random access preambles GroupB; if the sizeof ra-preableschroupa parameter does not exist, the number m=n of the contention random access preamble groups.

In this scheme, when the base station configures the number N of contention random access Preambles to the communication terminal through the numberOfRA-preamplles parameter in the RACH-ConfigCommon information unit for LTE, the number N of power communication terminal dedicated random access Preambles is considered and may be reserved in the following manners:

A) In a protocol agreed mode, namely, the base station and the power communication terminal reserve the number of non-competitive random access Preambles, and further reserve the number N of special random access Preambles of the power communication terminal, the value of the numberofRA-preamplles is still n=4, 8, 12 and … …, but the number of the non-competitive random access Preambles is 64-N-N; this scheme has less impact on standard protocols.

B) The base station explicitly indicates the value of the number N of the special random access preambles of the communication terminal power communication terminal through signaling parameters, and the parameters are required to be added in the RACH-ConfigCommon information unit.

The configuration mode of the 5GNR random access preamble code is as follows:

since 5 GNRs support Beam Forming (Beam Forming) technology by default, 5GNR random access is slightly different from LTE random access. The SSB of the NR is related to a beam, and the communication terminal first selects a beam according to a policy, and transmits a preamble on a preamble transmission resource corresponding to the beam, so that the base station can determine the beam resource selected by the communication terminal according to the preamble transmission resource of the communication terminal.

In addition, the partial system information transmission mode of 5GNR is different from LTE, and the partial system information is not periodically broadcast transmission, but is transmitted by the base station after the communication terminal transmits a request, i.e., on-demandSI.

But 5GNR is similar to LTE in random access preamble configuration.

1) The base station configures the number L of competitive random access and non-competitive random access Preambles to the communication terminal through the total number OfRA-preamps parameter in the RACH-ConfigCommon information unit, wherein L is an integer of 1-63, and thus deduces that the number of the random access Preambles reserved by the base station for other purposes is 64-L; since the total number ofra-preables is an optional field, if the field does not exist, the base station considers that the number of random access Preambles is not reserved for other purposes, and the number of random access Preambles of contention random access and non-contention random access is 64.

2) The base station configures the number n of contention random access Preambles on each SSB beam to the communication terminal through SSB-perRACH-OccasionandCB-preambiserssb parameters (CB-preambiserssb) in the RACH-Configcommon information unit, wherein the value of n is an enumeration type or an integer, and the number of non-contention random access Preambles on each SSB beam is total NumberOfRA-preambiles-n.

3) The base station may configure the number m of corresponding contention random access preambles GroupA on each SSB beam to the communication terminal through the numberOfRA-preambiresgroupa parameter in groupBconfigured in the RACH-ConfigCommon information element, where m=an integer of 1 to 64, and is then used for the number n-m of contention random access preambles GroupB.

In this scheme, for 5G, the base station may reserve the number N of power communication terminal-specific random access preambles for the power communication terminal in the following ways:

a) The method comprises the steps that through a protocol appointing mode, namely a base station and a communication terminal appoint to reserve the number N of special random access Preambles of the power communication terminal for the power communication terminal, the value of the total number ofRA-preamplles is an integer between n=1 and P, wherein p=63-N; this scheme has less impact on standard protocols.

B) The method is still realized by a protocol convention mode, namely, a base station and a communication terminal convention reserves the number N of the special random access Preambles of the power communication terminal for the power communication terminal, the value of the total NumberOfRA-preamplexes is unchanged, but when the value of CB-preamplesPerSSB in ssb-perRACH-OccasionandCB-preamplesPerSSB is configured, the number N of the special random access Preambles of the power communication terminal is reserved, and then the value of CB-preamplesPerSSB is the original value minus N; this scheme has less impact on standard protocols.

C) The base station explicitly indicates the value of the number N of the special random access preambles of the communication terminal power communication terminal through signaling parameters, and the parameters are required to be added in the RACH-ConfigCommon information unit.

For two-step random access, the method is similar:

a) The method comprises the steps that through a protocol stipulation mode, namely a base station and a communication terminal stipulate that the number N of special random access Preambles of the power communication terminal is reserved for the power communication terminal, the value of MsgA-TotalNumberOfRA-preamples-r 16 is an integer between n=1 and P, wherein P=63-N; this scheme has less impact on standard protocols.

B) The method is still realized by a protocol convention mode, namely, a base station and a communication terminal are convention to reserve the number N of the special random access Preambles of the power communication terminal for the power communication terminal, the value of MsgA-TotalNumberOfRA-Preambles-r16 is unchanged, but when the value of CB-preambiserPerSSB in MsgASSB-perRACH-OccasionandCB-preambiserSSB-r 16 is configured, the number N of the special random access Preambles of the power communication terminal is reserved, and the value of CB-preambiserPerSSB is the original value minus N; this scheme also has less impact on standard protocols.

C) The base station explicitly indicates the value of the number N of the special random access preambles of the communication terminal power communication terminal through signaling parameters, and then the parameters need to be added in the RACH-ConfigCommonTwoStepRA-r16 information unit.

Specifically, since the base station includes 64 random access preambles in total, although the base station configures the number of random access preambles, the specific number of the random access preambles is not specified, and according to the habit, N random access preambles may be reserved from the back to the front, that is: if the number of the preambles for random access is 63 and the corresponding preamble numbers are 1 to 63, the random access preamble numbers (63-n+1) to 63 are reserved for the power communication terminal, and the power communication terminal selects one from the N numbers to transmit when performing contention random access.

In one possible implementation manner, referring to fig. 2, the power communication terminal network random access method specifically includes the following steps:

s11: generating a plurality of random access leading codes, selecting one special random access leading code of the electric power communication terminals from the reserved random access leading codes of the electric power communication terminals, and sending the special random access leading code of the electric power communication terminals to a base station as a target random access leading code.

S12: transmitting the target random access preamble to the base station; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send random access response information scrambled through the RA-RNTI of the electric power terminal, wherein the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and the TC-RNTI.

S13: receiving random access response information, descrambling through an RA-RNTI of the power terminal, and sending msg3 information scrambled through the TC-RNTI to a base station according to an uplink time advance, an uplink scheduling transmission resource indication and the TC-RNTI in the random access response information when the random access response information contains an index value of a target random access preamble; the msg3 information is used for triggering a base station to descramble through the TC-RNTI, and sending contention resolution information which is scrambled through the C-RNTI and contains the user initial identification of the power communication terminal; the msg3 information comprises an RRC connection establishment request message, and the RRC connection establishment request message comprises a user initial identification of the power communication terminal.

S14: and receiving the contention resolution message and descrambling through the TC-RNTI, and accessing the network by the power communication terminal when the contention resolution message contains the initial identification of the user of the power communication terminal.

Specifically, the generating the plurality of random access preambles includes:

the base station broadcasts a logic index value used for generating 64 random access lead codes and a time-frequency resource for transmitting the random access lead codes, and transmits the logic index value and the time-frequency resource to the communication terminal; and the communication terminal looks up a table according to the logic index value to obtain a root value u for generating random access lead codes, and generates 64 random access lead codes according to the u.

The following are device embodiments of the present invention that may be used to perform method embodiments of the present invention. For details not disclosed in the apparatus embodiments, please refer to the method embodiments of the present invention.

Referring to fig. 3, in still another embodiment of the present invention, a power communication terminal network random access system is provided, which can be used to implement the above power communication terminal network random access method, and specifically, the power communication terminal network random access system includes a preamble transmission module.

The preamble code sending module is used for selecting one special random access preamble code of the power communication terminals from a plurality of special random access preamble codes reserved in all the random access preamble codes when the random access preamble codes need to be sent in the random access process, and sending the special random access preamble code to the base station as a target random access preamble code; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, and the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI.

In a possible implementation manner, the target random access preamble is used for triggering the base station to send random access response information scrambled by the power terminal RA-RNTI; the power communication terminal network random access system further comprises a random access response module, wherein the random access response module is used for generating the power terminal RA-RNTI according to the power terminal RA-RNTI generation rule when the random access response information needs to be descrambled in the random access process, and descrambling the random access response information according to the power terminal RA-RNTI.

All relevant contents of each step involved in the foregoing embodiment of the power communication terminal network random access method may be cited to the functional description of the functional module corresponding to the power communication terminal network random access system in the embodiment of the present invention, which is not described herein.

The division of the modules in the embodiments of the present invention is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present invention may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

In yet another embodiment of the present invention, a computer device is provided that includes a processor and a memory for storing a computer program including program instructions, the processor for executing the program instructions stored by the computer storage medium. The processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, etc., which are the computational core and control core of the terminal adapted to implement one or more instructions, in particular to load and execute one or more instructions within a computer storage medium to implement a corresponding method flow or a corresponding function; the processor provided by the embodiment of the invention can be used for the operation of the network random access method of the power communication terminal.

In yet another embodiment of the present invention, a storage medium, specifically a computer readable storage medium (Memory), is a Memory device in a computer device, for storing a program and data. It is understood that the computer readable storage medium herein may include both built-in storage media in a computer device and extended storage media supported by the computer device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also stored in the memory space are one or more instructions, which may be one or more computer programs (including program code), adapted to be loaded and executed by the processor. The computer readable storage medium herein may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. One or more instructions stored in a computer-readable storage medium may be loaded and executed by a processor to implement the corresponding steps of the method for network random access for an electrical communication terminal in the above-described embodiments.

It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely 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 (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims (13)

1. A method for random access of a power communication terminal network, comprising:

when a random access preamble is required to be sent in the random access process, selecting one special random access preamble of the electric power communication terminals from a plurality of special random access preambles of all the random access preambles, and sending the special random access preamble as a target random access preamble to a base station; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, and the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI.

2. The power communication terminal network random access method according to claim 1, wherein selecting one power communication terminal-specific random access preamble from among the plurality of power communication terminal-specific random access preambles reserved in all the random access preambles and transmitting the selected power communication terminal-specific random access preamble to the base station as the target random access preamble comprises:

setting the numbers of the special random access lead codes of a plurality of electric power communication terminals reserved in all the random access lead codes as (Q-N) to Q-1; wherein Q is the total number of the system random access preambles, and N is the total number of the special random access preambles of the power communication terminal;

Selecting a special random access lead code of the power communication terminal with the number of (Q-N+n), and sending the special random access lead code to a base station as a target random access lead code; wherein N is an integer of 0 or more and less than N.

3. The power communication terminal network random access method according to claim 2, wherein n=mod (M, N), mod represents a remainder function, and M is a power communication terminal identification number.

4. The power communication terminal network random access method according to claim 1, wherein the base station packages the random access response information of the power communication terminal-specific random access preamble transmitted by the power communication terminal in one data packet to transmit when at least two random access response information exist simultaneously within one random access response reception window.

5. The power communication terminal network random access method according to claim 1, wherein the power communication terminal stores a plurality of power communication terminal-specific random access preambles when the power communication terminal-specific random access preambles are used for a contention random access procedure and a non-contention random access procedure of the power communication terminal; when the special random access preamble code of the power communication terminal is only used for the competition random access process of the power communication terminal, and the base station can select other random access preamble codes to be configured to the power communication terminal in the non-competition random access process of the power communication terminal, the power communication terminal stores all random access preamble codes.

6. The power communication terminal network random access method according to claim 1, further comprising:

and reserving a plurality of special random access lead codes for the power communication terminals in all random access lead codes by adopting a protocol agreed mode or a signaling parameter mode by a base station.

7. The power communication terminal network random access method according to claim 1, wherein the target random access preamble is used for triggering a base station to transmit random access response information scrambled by a power terminal RA-RNTI;

the power communication terminal network random access method further comprises the following steps: when the random access response information needs to be descrambled in the random access process, generating the RA-RNTI of the power terminal according to the RA-RNTI generating rule of the power terminal, and descrambling the random access response information according to the RA-RNTI of the power terminal.

8. The power communication terminal network random access method according to claim 7, wherein the generating the power terminal RA-RNTI according to the power terminal RA-RNTI generation rule comprises:

when the random access network is a 5G NR network and the power communication terminal adopts four-step random access, the power terminal RA-RNTI generation rule is as follows: the power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+32768, or the power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier id+ (RAPID < < 16);

Wherein s_id represents the 1 st OFDM symbol index of PRACH sending time, and the value is 0-13; when the subcarrier interval is 480kHz or 960kHz, t_id represents the time slot index of 120kHz in a system frame containing PRACH transmission time, the value is 0-79, otherwise, t_id represents the 1 st time slot index of PRACH transmission time in a system frame, and the value is 0-79; f_id represents an index of PRACH transmission time on a frequency domain, and the value is 0-7 according to the sequence from low frequency to high frequency; ul_carrier_id represents an uplink carrier transmitted by the random access preamble, a value of 0 represents a normal uplink carrier, and a value of 1 represents an auxiliary uplink carrier; x represents a multiplication symbol; < represents a left shift, (RAPID < < 16) represents a left shift of RAPID by 16 bits, RAPID represents a preamble index transmitted by the power terminal;

when the random access network is a 5G NR network and the power communication terminal adopts two-step random access, the generation rule of the RA-RNTI of the power terminal is as follows: power terminal RA-rnti=1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2+

(RAPID<<16)；

When the random access network is a 4G network, the power terminal RA-RNTI generation rule is mode 1, mode 2, or mode 3:

mode 1: electric terminal RA-rnti= ((1+t_id) _4G +10×f_id _4G )<<6)+RAPID

Mode 2: electric power terminal RA-rnti=1+t_id _4G +10×f_id _4G +64

Mode 3: electric power terminal RA-rnti=1+t_id _4G +10×f_id _4G +(RAPID)<<6

Wherein t_id _4G A first subframe index representing the transmitted PRACH, the value of which is 0-9; f_id _4G Representing the index of PRACH transmitted on the same subframe on the frequency domain, and taking the value of 0-5 according to the sequence from low frequency to high frequency;<<6 denotes a shift to the left by 6 bits.

9. The power communication terminal network random access method according to claim 7, comprising:

generating a plurality of random access leading codes, selecting one special random access leading code of the electric power communication terminal from the reserved random access leading codes of a plurality of electric power communication terminals, and sending the special random access leading code to a base station as a target random access leading code;

transmitting the target random access preamble to the base station; the target random access lead code is used for indicating the current random access terminal of the base station to be the power communication terminal and triggering the base station to send random access response information scrambled through the RA-RNTI of the power terminal, wherein the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and the TC-RNTI;

Receiving random access response information, descrambling through an RA-RNTI of the power terminal, and sending msg3 information scrambled through the TC-RNTI to a base station according to an uplink time advance, an uplink scheduling transmission resource indication and the TC-RNTI in the random access response information when the random access response information contains an index value of a target random access preamble; the msg3 information is used for triggering a base station to descramble through the TC-RNTI, and sending contention resolution information which is scrambled through the C-RNTI and contains the user initial identification of the power communication terminal; the msg3 information comprises an RRC connection establishment request message, wherein the RRC connection establishment request message comprises a user initial identifier of the power communication terminal;

and receiving the competition-solving message and descrambling through the C-RNTI, and accessing the power communication terminal into the network when the competition-solving message contains the initial identification of the user of the power communication terminal.

10. A power communication terminal network random access system, comprising:

the system comprises a preamble code sending module, a base station and a random access preamble code sending module, wherein the preamble code sending module is used for selecting one special random access preamble code of the power communication terminals from a plurality of special random access preamble codes reserved in all the random access preamble codes when the random access preamble codes need to be sent in the random access process, and sending the special random access preamble code of the power communication terminals to the base station as a target random access preamble code; the target random access lead code is used for indicating that the current random access terminal of the base station is an electric power communication terminal and triggering the base station to send scrambled random access response information, and the random access response information comprises an index value of the target random access lead code, an uplink time advance, an uplink scheduling transmission resource indication and a TC-RNTI.

11. The power communication terminal network random access system according to claim 10, wherein the target random access preamble is used to trigger a base station to transmit random access response information scrambled by a power terminal RA-RNTI;

the power communication terminal network random access system further includes: and the random access response module is used for generating the RA-RNTI of the power terminal according to the RA-RNTI generation rule of the power terminal when the random access response information needs to be descrambled in the random access process, and descrambling the random access response information according to the RA-RNTI of the power terminal.

12. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, realizes the steps of the power communication terminal network random access method according to any one of claims 1 to 9.

13. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the power communication terminal network random access method according to any one of claims 1 to 9.