WO2017121380A1

WO2017121380A1 - Random access method and apparatus

Info

Publication number: WO2017121380A1
Application number: PCT/CN2017/071105
Authority: WO
Inventors: 陆婷; 戴博; 余媛芳; 邹伟; 戴谦
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-01-13
Filing date: 2017-01-13
Publication date: 2017-07-20

Abstract

Disclosed are a random access method and apparatus. The random access method comprises: a communication node acquiring random access information; and the communication node determining an RA-RNTI according to the random access information, wherein the random access information comprises a sequence number of a subframe for sending a preamble and a sequence number of a wireless frame for sending the preamble, or the random access information comprises a time domain position index for sending the preamble and a frequency domain position index for sending the preamble.

Description

Random access method and device

Technical field

The present application relates to, but is not limited to, the field of communications, and in particular, to a random access method and apparatus.

Background technique

Machine Type Communication (MTC) is an important subject of the fifth generation of mobile communication technology (5G) and an important application field for wireless communication in the future. In the MTC project, the sub-project of Narrow Band-Internet of Things (NB-IoT) is proposed for the terminal characteristics such as low cost, low power consumption, low mobility, and low throughput. In the band of Hzz (khz), low-throughput wireless communication services are provided for NB-IoT low-cost terminals (UE, User Equipment).

In the original LTE (Long Term Evolution) air interface initial establishment process, the terminal adopts a contention access mechanism, first transmitting a preamble, and then transmitting the position of the third subframe after the last subframe of the preamble. A random access (RA, Random Access) response window is started, and a random access response (RAR, Random Access Response) message is received. The length of the RA response window is configured by system messages, and the maximum length is 10 radio subframes (ie, 1 radio frame). The terminal demodulates the Physical Downlink Control Channel (PDCCH) by using a random access-Radio Network Temporary Identity (RA-RNTI) in the RA response window, and then demodulates the physical downlink shared channel ( The PDSCH (Physical Downlink Shared Channel) is used to obtain a Medium Access Control (MAC) Protocol Data Unit (PDU) including its RAR. The time-frequency position of the preamble determines the value of the RA-RNTI, and the base station and the terminal each calculate a consistent RA-RNTI value according to the time-frequency position of the preamble. In the relevant standards, the calculation formula of RA-RNTI is as follows:

RA-RNTI=1+t_id+10×f_id,

The t_id is a sequence number of the first subframe in which the preamble is transmitted, that is, the first subframe, and the value ranges from [1, 10), that is, 0≤t_id<10, and the f_id is a physical random access channel in the subframe ( PRACH, Physical Random Access Channel), in ascending order, in the range of [0, 6), that is, 0 ≤ f_id < 6. According to the above formula, the value range of RA-RNTI is [1, 60].

For a Frequency Division Duplexing (FDD) system, f_id is always equal to 0, and the above formula can be simplified as:

RA-RNTI=1+t_id,

Where t_id indicates the sequence number of the first subframe in which the terminal sends the preamble.

According to the above, it can be known that: (1) if two terminals transmit preambles in the same subframe of the same radio frame, their RA response windows overlap, and the RA-RNTI used by the base station to transmit the RAR for scrambling the PDCCH channel is also the same, and can only be followed by (2) If the two terminals transmit the preamble in the same subframe of different radio frames, although the base station transmits the same RA-RNTI that the RAR uses to scramble the PDCCH channel, the RA response window is not longer than one. Radio frame, therefore, the RA response windows of the two terminals receiving the RAR cannot overlap, and the collision can be avoided by the isolation of the RA response window; (3) if the two terminals transmit the preamble in different subframes of different radio frames, Calculate different RA-RNTIs to avoid collisions.

In summary, based on the value range of the RA response window of the relevant standard, the calculation of the RA-RNTI only needs to reflect the difference of the different preamble transmission start subframes.

However, for the MTC and NB-IoT communication scenarios, considering the low-cost terminal transmission and reception capability is limited, or in the scenario of poor coverage, the related research introduces the repetition function of uplink transmission and downlink transmission, that is, whether the terminal sends an uplink message or a base station. When sending a downlink message, the reception effect is guaranteed by a certain number of repetitions. Correspondingly, the time required for the terminal to receive the downlink message or the base station to receive the uplink message may be extended. Therefore, in the related research, the value range of the RA response window is expanded, and the maximum is 400 subframes, that is, 40 radio frames.

In addition, the concept of coverage level is introduced in the related research to reflect the difference in coverage of different terminals. It can be considered that the uplink and downlink channels of terminals with the same coverage level can adopt the same repetition factor, and the length of the RA response window can also be same.

Combined with the foregoing analysis, it can be seen that since the extended RA response window can exceed one radio frame, for the case where two terminals transmit preambles in the same subframe of different radio frames, their RA response windows may overlap. FIG. 1 is a schematic diagram showing an overlap of RA response windows of two terminals caused by an extension of the RA response window. In FIG. 1, the subframe marked by the grid is the starting subframe position of the transmitting preamble, The slash marked sub-frame is the RA response window position. However, according to the existing RA-RNTI calculation formula, the RA-RNTIs of the two terminals shown in FIG. 1 are the same; on the one hand, the two terminals may need to demodulate the PDCCH twice in the overlapping RA response window, which increases power consumption. On the other hand, if the two terminals happen to adopt the same preamble sequence number, their RAR content is the same, and will need to be processed through the subsequent conflict resolution process. At least one terminal access failure is equivalent to the introduction. Additional conflicts.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a random access method and device, which can ensure that when the random access (RA, Random Access) response windows of the terminal overlap, no additional conflicts are generated, and the power consumption of the terminal is reduced.

A random access method includes: a communication node acquiring random access information, where the random access information includes: a sequence number of a subframe for transmitting a preamble, a sequence number of a radio frame for transmitting a preamble; and the communication The node determines the RA-RNTI according to the random access information.

The embodiment of the present invention further provides a random access method, including: the communication node acquires random access information, where the random access information includes: a time domain location index information for transmitting a preamble, and a frequency domain location index information for transmitting a preamble. The communication node determines the RA-RNTI based on the random access information.

The embodiment of the present invention further provides a random access method, including: a communication node acquiring random access information, where the random access information includes: a time domain location index information of a preamble sent by a terminal, and a frequency domain location where the terminal sends a preamble Index information; the communication node determines the RA-RNTI based on the random access information.

An embodiment of the present invention further provides a random access method, including: a communication node acquiring a random access information correlation factor; and the communication node determining an RA-RNTI according to the random access information correlation factor.

The embodiment of the present invention further provides a random access device, which is applied to a communication node, and includes: an information acquiring module, configured to acquire random access information, where the random access information includes: sending The sequence number of the preamble subframe, the sequence number of the radio frame transmitting the preamble, and the processing module, configured to determine the RA-RNTI according to the random access information.

The embodiment of the present invention further provides a random access method, including: the communication node acquires random access information, and the communication node determines the random access response window related information according to the random access information.

The embodiment of the present invention further provides a random access method, including: a communication node acquiring random access information, where the random access information includes: a sequence number of a superframe for transmitting a preamble; and the communication node is randomly connected according to the The incoming information determines the RA-RNTI.

In addition, an embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, which are implemented by the processor to implement any of the above random access methods.

In the embodiment of the present invention, by introducing a factor that reflects the difference of the starting radio frame of the preamble or the frequency domain location index information of the transmitting preamble in the calculation formula of the RA-RNTI, it is ensured that when the RA response window of the terminal overlaps, no additional is generated. Conflicts and reduce terminal power consumption.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a schematic diagram showing an overlap of RA response windows of two terminals caused by an extension of the RA response window;

2 is a flowchart of a random access method according to an embodiment of the present invention;

3 is a schematic diagram of an application example 1 of the fifth embodiment;

4 is a schematic diagram of an application example 2 of the fifth embodiment;

FIG. 5 is a schematic diagram of a random access device according to an embodiment of the present disclosure;

FIG. 6 is a flowchart of another random access method according to an embodiment of the present invention.

Embodiments of the invention

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

FIG. 2 is a flowchart of a random access method according to an embodiment of the present invention. as shown in picture 2, The random access method provided in this embodiment includes the following steps:

Step 201: The communication node acquires random access information, where the random access information includes: a sequence number of a preamble transmitting subframe, and a sequence number of a radio frame that transmits the preamble;

Step 202: The communication node determines a random access radio network temporary identifier (RA-RNTI) according to the random access information.

The communication node is, for example, a terminal or a base station. The terminal may determine the RA-RNTI according to the random access information of the terminal, and the base station may determine the RA-RNTI according to the random access information of the corresponding terminal.

In an exemplary embodiment, the random access information may include: a sequence number of a start or end subframe in which the preamble is transmitted, a sequence number of a start or end radio frame in which the preamble is transmitted. However, the embodiments of the present invention are not limited thereto. In other exemplary embodiments, the sequence number of the starting subframe for transmitting the preamble may be determined according to the sequence number of the subframe that sends the non-starting position of the preamble and the corresponding information, or may be based on the wireless sending the non-starting position of the preamble. The sequence number of the frame and the corresponding information determine the sequence number of the starting radio frame for transmitting the preamble.

In an exemplary embodiment, step 202 may include the communication node determining that the RA-RNTI is:

RA_RNTI=n0+t_id+k1×u_id;

Where n0 and k1 are coefficients, t_id is the sequence number of the start (ie, the first) subframe of the preamble, and u_id is the sequence number of the start (ie, the first) radio frame of the preamble.

Where n0 is, for example, 1; k1 is, for example, 10, or k1=1+MAX(t_id), MAX(t_id) represents a maximum value within a range of values of t_id, and t_id is a sequence number of a starting subframe in which a preamble is transmitted.

In an exemplary embodiment, the random access information may further include: a random access (RA) response window length, and an interval length of the preamble, where the interval length may be obtained by calculation or pre-configuration.

RA_RNTI=n0+t_id+k1×v_id;

Where n0 and k1 are coefficients, t_id is the sequence number of the starting subframe in which the preamble is transmitted, and v_id is a comprehensive factor determined according to one or a combination of the following:

The sequence number of the initial radio frame to which the preamble is sent;

RA response window length;

The interval length at which the preamble is sent, which can be obtained by calculation or pre-configuration.

In an exemplary embodiment,

V_id=u_id mod WLen; or,

V_id=u_id mod(WLen/10); or,

V_id=(u_id×10) mod WLen;

Where u_id is the sequence number of the starting radio frame of the preamble, and WLen is the length of the RA response window, in units of subframes, and mod represents modulo.

Where WLen can be replaced by WLen', WLen' = WLen-2.

In an exemplary embodiment,

V_id=((u_id×10)/PRACHWinLen)mod WLen; or,

V_id=((u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen); or,

V_id=((u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo .

Where WLen can be replaced by WLen', WLen' = WLen-2.

In an exemplary embodiment,

V_id=((u_id×10)/PRACHWinLen)mod WLen; or,

V_id=((u_id×10)/PRACHWinLen)mod ceil(WLen/PRACHWinLen); or,

V_id=((u_id×10)/PRACHWinLen) mod(floor(WLen/PRACHWinLen)+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo ,ceil() means round up (ie Represents the return of the smallest integer greater than or equal to the specified expression. floor() means rounding down (that is, returning the largest integer less than or equal to the specified expression).

Where WLen can be replaced by WLen', WLen' = WLen-2.

In an exemplary embodiment,

V_id=(u_id/PRACHWinLen)mod(WLen/10); or,

V_id=(u_id/PRACHWinLen)mod(WLen/(PRACHWinLen×10)); or,

V_id=(u_id/PRACHWinLen)mod((WLen/(PRACHWinLen×10))+1);

Where WLen can be replaced by WLen', WLen' = WLen-2.

In an exemplary embodiment,

V_id=(u_id/PRACHWinLen)mod(WLen/10); or,

V_id=(u_id/PRACHWinLen)mod ceil(WLen/(PRACHWinLen×10)); or,

V_id=(u_id/PRACHWinLen)mod(floor(WLen/(PRACHWinLen×10))+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo , ceil () means rounded up, floor () means rounded down.

Where WLen can be replaced by WLen', WLen' = WLen-2.

RA_RNTI=n0+(((t_id+u_id×10)/PRACHWinLen)mod WLen); or,

RA_RNTI=n0+(((t_id+u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen)); or,

RA_RNTI=n0+(((t_id+u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen+1));

Where t_id is the sequence number of the starting subframe of the preamble, and u_id is the preamble. The sequence number of the starting radio frame, PRACHWinLen is the interval length of the preamble. The interval length can be obtained by calculation or pre-configuration. In the subframe, WLen is the length of the RA response window, mod is the modulo, and n0 is the coefficient.

Where n0 is, for example, 1.

Where WLen can be replaced by WLen', WLen' = WLen-2.

In an exemplary embodiment, PRACHWinLen represents the interval length of the preamble transmitted in the same subframe, that is, the interval length between adjacent (closest) two preambles transmitted in the same subframe of different radio frames, in frame Units are in units of sub-frames.

In an exemplary embodiment, PRACHWinLen indicates the interval length at which the preamble is transmitted in the same subframe, and the interval length can be calculated by:

PRACHWinLen=COM _PRACH /N _{PRACH_PerFrame} ;

Where COM _PRACH is the least common multiple of P _preamble and N _{PRACH_PerFrame} ;

N _{PRACH_PerFrame} indicates the number of PRACH resources configured in each radio frame, and P _preamble indicates the repetition factor of the preamble.

In an exemplary embodiment, PRACHWinLen=10×P _preamble /N _{PRACH_PerFrame} ;

The PRACHWinLen indicates the interval length of the preamble, the N _{PRACH_PerFrame} indicates the number of PRACH resources configured in each radio frame, and the P _preamble indicates the repetition factor of the preamble.

In an exemplary embodiment, PRACHWinLen indicates the interval length at which the preamble is transmitted, and is determined according to one or a combination of the following:

The starting subframe number of the PRACH resource;

The number of PRACH resources configured in each radio frame;

a subframe sequence number that can be used to transmit a preamble configured in each radio frame;

Preamble format;

The repeating factor of the preamble.

In an exemplary embodiment, PRACHWinLen represents the interval length of the pre-configured transmission preamble, and the unit may be one of the following: a frame, a subframe, and a maximum number of transmission preambles.

In an exemplary embodiment, if the sequence number of the radio frame currently available for transmitting the preamble is greater than or equal to MAX _{FrameIndex -} PRACHWinLen, skip the frames and re-detect the wireless that can be used to transmit the preamble from the radio frame with sequence number 0. Frame, where MAX _FrameIndex is the maximum value of the radio frame number.

In an exemplary embodiment, after the step 202, the random access method provided in this embodiment may further include: when the determined RA-RNTI exceeds a maximum value within a predetermined value range, the communication node determines that the RA-RNTI is Predetermined value.

In an exemplary embodiment, step 202 may include:

When one of the following random access information or a combination thereof corresponds to the coverage level: the RA response window length, the repetition factor of the preamble, and the interval length of the transmission preamble, the calculation of the RA-RNTI also corresponds to the coverage level.

It should be noted that the related research has made it clear that terminals at different coverage levels can search for PDCCH in different search spaces, that is, even if the RA-RNTIs of the two terminals are the same, the response windows overlap, and they need to be solved because they are at different coverage levels. The PDCCH is also different, and no additional collisions are generated. Therefore, in the study of the optimization of the RA-RNTI calculation formula, the present application does not temporarily consider the influence of different coverage levels in order to simplify the design.

In addition, for the MTC and NB-IoT communication scenarios, more narrowband resources are introduced. Different terminals can transmit preambles at different narrowband locations and receive RARs at corresponding locations. Therefore, this application studies the optimization of RA-RNTI calculation formulas. The impact of different narrowband resources is not considered for the time being, in order to simplify the design.

In addition, the embodiment of the present invention further provides a random access method, including: the communication node acquires random access information, where the random access information includes: a time domain location index information for transmitting a preamble, and a frequency domain location index information for transmitting a preamble. The communication node determines the RA-RNTI based on the random access information.

Wherein, when the number of radio frames or subframes is insufficient, frequency domain information may be added in the calculation of the RA-RNTI.

In an exemplary embodiment, determining, by the communication node, the RA-RNTI according to the random access information may include: the communication node determining that the RA-RNTI is:

RA_RNTI=n0+t_id+k1×v_id+WLen×w_id;

Where n0 and k1 are coefficients, t_id is the sequence number of the starting subframe in which the preamble is transmitted; w_id is the frequency domain position index of the transmitting preamble; and WLen is the length of the RA response window;

V_id is a composite factor determined according to one or a combination of the following:

The serial number of the radio frame to which the preamble is sent;

The starting subframe number of the PRACH resource;

RA response window length;

In an exemplary embodiment,

V_id=(u_id/PRACHWinLen)mod(WLen/10); or,

V_id=(u_id/PRACHWinLen)mod ceil(WLen/(PRACHWinLen×10)); or,

V_id=(u_id/PRACHWinLen)mod(floor(WLen/(PRACHWinLen×10))+1);

PRACHWinLen=COM _PRACH /N _{PRACH_PerFrame} ;

In an exemplary embodiment, WLen may be replaced by WLen', wherein

WLen’=n0+MAX(t_id)+k1×MAX(u_id),

MAX(t_id) represents the maximum value in the range of t_id, MAX(u_id) represents the maximum value in the range of u_id, u_id is the sequence number of the starting radio frame of the preamble, and t_id is the starting subframe of the preamble. Serial number.

In an exemplary embodiment, after the determining, by the communications node, the RA-RNTI according to the random access information, the random access method in this embodiment may further include: when the determined RA-RNTI exceeds a maximum within a predetermined value range At the time of the value, the communication node determines that the RA-RNTI is a predetermined value.

In an exemplary embodiment, the determining, by the communications node, the RA-RNTI according to the random access information may include:

In addition, the embodiment of the present invention further provides a random access method, including: the communication node acquires random access information, where the random access information includes: the time domain location index information of the preamble sent by the terminal, and the frequency domain location of the preamble sent by the terminal. Index information; the communication node determines the RA-RNTI based on the random access information.

In an exemplary embodiment, the random access information may further include one or a combination of the following: an RA response window length, and an interval length of the preamble, which may be obtained by calculation or pre-configuration.

In an exemplary embodiment, the determining, by the communications node, the RA-RNTI according to the random access information may include: the communications node determining that the RA-RNTI is:

RA_RNTI=n0+s_id+w_id×PRACHWinLen;

Where n0 is a coefficient, s_id is a time domain location index of the preamble sent by the terminal, w_id is a frequency domain location index of the preamble sent by the terminal, and PRACHWinLen is a length of the interval for transmitting the preamble, and the interval length can be obtained by calculation or pre-configuration.

Where n0 is, for example, 1.

PRACHWinLen=COM _PRACH /N _{PRACH_PerFrame} ;

In an exemplary embodiment, PRACHWinLen=10×P _preamble /N _{PRACH_PerFrame} ;

In an exemplary embodiment, PRACHWinLen indicates the interval length at which the preamble is transmitted, and may be determined according to one or a combination of the following:

The starting subframe number of the PRACH resource;

The number of PRACH resources configured in each radio frame;

Preamble format;

The repeating factor of the preamble.

RA_RNTI=n0+w_id+s_id×PRACHFreLen;

Where n0 is a coefficient, s_id is a time domain location index for transmitting a preamble, and w_id is a transmission The frequency domain location index of the preamble, PRACHFreLen is the frequency domain interval length for transmitting the preamble or the maximum number of preambles that can be transmitted in the frequency domain multiplexing.

Where n0 is, for example, 1.

The maximum number of preambles that can be transmitted in the frequency domain multiplexing is, for example, the maximum number of terminals or the maximum number of preambles.

In an exemplary embodiment, the PRACHFreLen indicates the length of the frequency domain interval for transmitting the preamble, and may be determined according to one of the following information or a combination thereof: the physical random access channel may be used to transmit the frequency domain resource configuration information of the preamble, and the frequency hopping mode.

In an exemplary embodiment, the time domain location index information may include any of the following:

The sequence number of the subframe in which the preamble is sent;

The sequence number of the radio frame to which the preamble is sent.

In an exemplary embodiment, the frequency domain location index information may include any of the following:

Sending a starting frequency domain location index of the preamble;

Transmitting the frequency domain position offset of the preamble;

Send the frequency domain subcarrier index of the preamble.

In addition, the embodiment of the present invention further provides a random access method, including: the communication node acquires a random access information correlation factor; and the communication node determines the RA-RNTI according to the random access information correlation factor.

In an exemplary embodiment, the determining, by the communications node, the RA-RNTI according to the random access information correlation factor may include: the communications node determining that the RA-RNTI is:

Where n0 is a coefficient, N is the number of random access information correlation factors, and c _i is a random access information correlation factor,

MAX(c _i-1 ) represents the maximum value of c _i-1 .

Where n0 is, for example, 1.

In an exemplary embodiment, the random access information correlation factor may include any one or a combination of the following:

The sequence number of the starting subframe in which the preamble is sent;

The sequence number of the initial radio frame to which the preamble is sent;

The number of PRACH resources configured in each radio frame;

Repetitive factor of preamble;

The sequence number of the end subframe in which the preamble is sent;

The sequence number of the end radio frame that sent the preamble;

Transmitting the frequency domain position offset of the preamble;

Transmitting a frequency domain subcarrier index of the preamble;

RA response window length.

In an exemplary embodiment, after the determining, by the communications node, the RA-RNTI according to the random access information correlation factor, the random access method in this embodiment may further include: when the determined RA-RNTI exceeds a maximum within a predetermined value range At the time of the value, the communication node determines that the RA-RNTI is a predetermined value.

In an exemplary embodiment, the determining, by the communications node, the RA-RNTI according to the random access information correlation factor may include:

The following describes the calculation method of the RA-RNTI provided by the present application by using various embodiments. Bright.

Embodiment 1

In this embodiment, RA_RNTI=1+t_id+10×u_id,

The t_id is the sequence number of the first subframe in which the terminal sends the preamble, and the u_id is the sequence number of the first radio frame in which the terminal transmits the preamble.

The range of the value of the u_id is [0, 1023], and the range of the value of the t_id is [1, 10). Therefore, the range of the RA-RNTI value obtained by the RA-RNTI calculation formula provided in this embodiment is [1] , 10240].

Embodiment 2

In this embodiment, RA_RNTI=1+t_id+10×v_id,

The t_id is the sequence number of the first subframe in which the terminal sends the preamble, and the v_id is the sequence number of the first radio frame in which the terminal transmits the preamble, and the length of the RA response window in consideration of the current coverage level of the terminal and the interval at which the terminal transmits the preamble. The composite factor after the length (in units of wireless sub-frames).

In this embodiment, v_id=((u_id×10)/PRACHWinLen) mod WLen,

Where u_id is the sequence number of the first radio frame of the preamble sent by the terminal. PRACHWinLen is the interval length of the transmitted preamble calculated based on the PRACH resource configuration and the repetition factor of the preamble under the current coverage level (hereinafter referred to as: repetition factor). Here, the terminal may calculate the PRACHWinLen according to the subframe number and the repetition factor that the base station configures for each radio frame that can be used to transmit the preamble. WLen is the RA response window length (in wireless subframes) at the current coverage level.

The range of the RA-RNTI value calculated based on the formula provided in this embodiment is [1, 10 × WLen]. Taking the largest WLen=400 subframe as an example, the RA-RNTI value ranges from [1, 4000].

Embodiment 3

In this embodiment, RA_RNTI=1+t_id+10×v_id,

The t_id is the sequence number of the first subframe in which the terminal sends the preamble, and the v_id is the sequence number of the first radio frame in which the terminal transmits the preamble, and considers the current coverage level of the terminal. The composite factor of the length of the RA response window and the length of the interval at which the terminal transmits the preamble (in units of wireless subframes).

In this embodiment, v_id=((u_id×10)/PRACHWinLen) mod WLen,

Where u_id is the sequence number of the first radio frame in which the terminal sends the preamble. PRACHWinLen is the interval length of the transmitted preamble calculated based on the PRACH resource configuration and the repetition factor of the preamble in the current coverage level (hereinafter referred to as the repetition factor).

Among them, you can simply calculate PRACHWinLen according to the following formula:

PRACHWinLen=10×P _preamble /N _{PRACH_PerFrame} ,

Wherein, P represents the _preamble of the preamble repetition factor at the terminal level of current coverage, where _N PRACH_PerFrame denotes the number of the base station PRACH resource configuration of each radio frame.

Where WLen is the RA response window length (in units of wireless subframes) under the current coverage level.

Embodiment 4

In this embodiment,

RA_RNTI=1+(((t_id+u_id×10)/PRACHWinLen)mod WLen),

The t_id is the sequence number of the start subframe of the preamble, and the u_id is the sequence number of the start radio frame of the preamble. The PRACHWinLen is the preamble sent by the terminal according to the PRACH resource configuration information and the repetition factor of the preamble of the current coverage level of the terminal. The length of the interval, WLen is the length of the RA response window under the current coverage level of the terminal, and mod indicates the modulo. For the value of the above parameters, refer to the second embodiment or the third embodiment, and therefore no further details are provided herein.

Embodiment 5

Considering that the PRACH repetition factor is the same for each user for the same coverage level, PRACHWinLen should be the same. In this way, the available PRACH resources can be grouped according to PRACHWinLen, and each group of available PRACH resources can only be occupied by one user. Therefore, the PRACHWinLen can be further divided into a plurality of PRACH resource groups in the RA response window, and the maximum number of users that can overlap each other with the RA response window can be considered to be equal to the available PRACH resources. The number of groups +1 (the reference user and other users who can send the preamble and initiate the RA response window within the user's RA response window) and map the actual frame numbers of these users to a set of consecutive frames that may result in overlapping RA response windows. On the serial number.

In this embodiment, RA_RNTI=1+t_id+10×v_id,

The t_id is the sequence number of the first subframe in which the terminal sends the preamble, and the v_id is the sequence number of the first radio frame in which the terminal transmits the preamble, and considers the length of the RA response window in the current coverage level of the terminal and the preamble sent by the terminal. The composite factor after the interval length (in wireless subframes).

In this embodiment,

V_id=((u_id×10)/PRACHWinLen)mod(WLen/PRACHWinLen+1),

The u_id is the sequence number of the first radio frame in which the terminal sends the preamble; the PRACHWinLen indicates the interval length of the preamble to be transmitted, and the calculation manner is the same as that in the second embodiment or the third embodiment, and therefore is not described here; WLen is the RA under the current coverage level. The response window length (in subframes).

The range of RA-RNTI values calculated based on the formula provided in this embodiment is [1, 10×(WLen/PRACHWinLen+1)].

The maximum WLen=400 subframe, the repetition factor is 8, and each radio frame is configured with two radio subframes as PRACH resources, and the RA-RNTI value ranges from [1, 110].

Generally, the base station will reasonably configure the RA response window size according to the repetition factor. The larger the repetition factor is, the longer the RA response window is. Therefore, under a reasonable configuration, the RA-RNTI value range can be further reduced.

In addition, in practical applications, if the ratio of WLen to PRACHWinLen is non-integer, it needs to be rounded and then calculated according to the formula. The rounding manner is, for example, rounding down. However, the embodiments of the present invention are not limited thereto.

In addition, it is considered that the RA response windows of the two closest users are not completely overlapped, and at least one subframe is different from each other. Therefore, WLen in the formula provided in the above embodiment may be replaced by WLen', where WLen' =WLen-2.

Embodiment 5 is exemplified below by a plurality of examples.

Example one

Assuming that the repetition factor is 2, the first two subframes of each radio frame are PRACH resources, and the RA response window is 20, the user situation that needs to distinguish the RA_RNTI is as shown in FIG. 3, where the grid marked subframe is a preamble transmission location. The sub-frame marked by the slash is the RA response window position.

In this example, according to the calculation formula provided in the fifth embodiment, it can be known that:

PRACHWinLen=10× repetition factor /N _{PRACH_PerFrame} =10×2/2=10;

UE1

UE2

UE3

UE4

among them,

Indicates rounding down.

Although UE1 is the same as the RA_RNTI of UE3, UE2 is the same as the RA_RNTI of UE4, but is allowed because their response windows do not overlap.

Example two

Assuming that the repetition factor is 2, each radio frame is configured with 10 subframes as PRACH resources, and the RA response window is 20, the user situation that needs to distinguish the RA_RNTI is as shown in FIG. 4, wherein the grid marked subframe is a preamble transmission location. The slash marked sub-frame is the RA response window position.

PRACHWinLen=10× repetition factor /N _{PRACH_PerFrame} =10×2/10=2;

UE1's RA_RNTI=1+0+10×((512×10/2) mod((20-2)/2+1))=1+0+10×(2560mod 10)=1+0=1;

UE2's RA_RNTI=1+2+10×((512×10/2) mod((20-2)/2+1))=1+2+10×(2560mod 10)=3+0=3;

UE3's RA_RNTI=1+4+10×((512×10/2) mod((20-2)/2+1))=1+4+ 10×(2560 mod 10)=5+0=5;

UE4's RA_RNTI=1+6+10×((512×10/2) mod((20-2)/2+1))=1+6+10×(2560mod 10)=7+0=7;

UE5's RA_RNTI=1+8+10×((512×10/2) mod((20-2)/2+1))=1+8+10×(2560mod 10)=9+0=9;

UE6's RA_RNTI=1+0+10×((513×10/2) mod((20-2)/2+1))=1+0+10×(2565mod 10)=1+50=51;

....

UE9's RA_RNTI=1+6+10×((513×10/2) mod((20-2)/2+1))=1+6+10×(2565mod 10)=7+50=57;

UE10's RA_RNTI=1+8+10×((513×10/2) mod((20-2)/2+1))=1+8+10×(2565mod 10)=9+50=59;

RA_RNTI=1+0+10×((514×10/2) mod((20-2)/2+1)))=1+0+10×(2570 mod 10)=1+0=1 of UE11.

Although UE1 is the same as the RA_RNTI of UE11, it is allowed because their response windows do not overlap.

Embodiment 6

In this embodiment,

RA_RNTI=1+(((t_id+u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen+1)),

Example 7

In this embodiment, RA_RNTI=1+t_id+10×v_id;

Where v_id=((u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen),

Where u_id is the sequence number of the first radio frame in which the terminal sends the preamble. PRACHWinLen is the interval length of the transmitted preamble calculated based on the PRACH resource configuration and the repetition factor of the preamble under the current coverage level. WLen is the RA response window length under the current coverage level of the terminal, and mod indicates the modulo. For the value of the above parameters, refer to the second embodiment or the third embodiment, and therefore no further details are provided herein.

Example eight

In this embodiment,

RA_RNTI=1+(((t_id+u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen)),

In addition, it is considered that the RA response windows of the two closest users are not completely overlapped, and at least one subframe is different from each other. Therefore, WLen in the formulas provided in Embodiments 2 to 8 can be replaced with WLen', where WLen' = WLen-2.

Example nine

In this embodiment, RA_RNTI=1+s_id+w_id×PRACHWinLen,

The s_id is the sequence number of the starting subframe in which the terminal sends the preamble, and the w_id is the starting frequency domain location index of the preamble sent by the terminal, and the interval length of the preamble sent by the terminal is the PRACHWinLen.

For the value of the PRACHWinLen, refer to the second embodiment or the third embodiment, and therefore no further details are provided herein.

Example ten

In this embodiment, RA_RNTI=1+w_id+s_id×PRACHFreLen,

The s_id is the sequence number of the starting subframe for transmitting the preamble, the w_id is the frequency domain location index for transmitting the preamble, and the PRACHFreLen is the frequency domain interval length for transmitting the preamble.

The PRACHFreLen may be determined according to one or a combination of the following information: the physical random access channel may be used to transmit the frequency domain resource configuration information of the preamble and the frequency hopping mode.

Embodiment 11

In this embodiment, RA_RNTI=n0+t_id+k1×v_id;

The sequence number of the initial radio frame to which the preamble is sent;

RA response window length;

among them,

V_id=u_id mod WLen; or,

V_id=u_id mod(WLen/10); or,

V_id=(u_id×10) mod WLen;

Where u_id is the sequence number of the first radio frame of the preamble sent by the terminal, and WLen is the length of the RA response window in the current coverage level (in units of wireless subframes), and mod indicates modulo.

FIG. 5 is a schematic diagram of a random access device according to an embodiment of the present invention. As shown in FIG. 5, the random access device provided in this embodiment is applied to a communication node, and includes:

The information obtaining module 501 is configured to acquire random access information.

The processing module 502 is configured to determine the RA-RNTI according to the random access information.

The random access information may include: a sequence number of the subframe in which the preamble is transmitted, and a sequence number of the radio frame in which the preamble is transmitted. Alternatively, the random access information may include: time domain location index information for transmitting the preamble and frequency domain location index information for transmitting the preamble. Alternatively, the random access information may include: the time domain location index information of the preamble sent by the terminal, and the frequency domain location index information of the preamble sent by the terminal.

In an exemplary embodiment, the random access information may further include: an RA response window length, and an interval length of the transmission preamble, wherein the interval length may be obtained by calculation or pre-configuration.

In addition, the embodiment of the present invention further provides a random access device, which is applied to a communication node, and includes: an information acquiring module configured to acquire a random access information correlation factor; and a processing module configured to determine the RA according to the random access information correlation factor -RNTI.

In practical applications, the functions of the information acquisition module are implemented, for example, by a wireless communication unit and a calculator, such as a processor having a computing function. However, the embodiments of the present invention are not limited thereto. The functions of the above modules may also be implemented by a processor executing programs and/or instructions stored in the memory.

In addition, for the related processing procedure of the random access device provided in this embodiment, reference may be made to the description of the foregoing method embodiments, and thus no further details are provided herein.

In practical applications, the FDD system is taken as an example. The main scenario of generating additional collisions is that two terminals in the same coverage level send preambles in the same subframe of different radio frames, and their response window length exceeds one radio frame, and overlapping. Based on the existing RA-RNTI calculation formula containing only subframe information, the two are identical in the same search space for demodulating the RA-RNTI of the PDCCH, and an additional collision is generated. To this end, the embodiment of the present invention introduces a factor that reflects the difference of the preamble transmission start radio frame or reflects the frequency domain location index information of the preamble in the RA-RNTI calculation formula, thereby ensuring that when the RA response window of the terminal overlaps, Generate additional conflicts and reduce terminal power consumption.

As shown in FIG. 6, the embodiment further provides a random access method, including the following steps:

Step 601: The communication node acquires random access information.

Step 602: The communication node determines the random access response window related information according to the random access information.

The random access information may include one or a combination of the following:

Downstream channel repetition information or a function that takes it as input;

a downlink control channel transmission period (PDCCH period) or a function as an input thereof;

Downlink control channel transmission interval (PDCCH transmission duration) or a function with it as an input;

a downlink shared channel transmission period (PDSCH period) or a function that takes it as an input;

Downlink shared channel transmission duration (PDSCH transmission duration) or a function of inputting it;

Upstream channel repetition information or a function that takes it as input;

Uplink access channel transmission period (PRACH period) or a function of inputting it;

The uplink access channel transmission interval (PRACH transmission duration) or a function of its input.

The random access response window related information may include:

Random access response window start time;

The time domain location at which the random access response window starts;

The interval between the start time of the random access response window and the end time of the preamble transmission.

In addition, an embodiment of the present invention further provides a random access method, including the following steps:

The communication node acquires the random access information, where the random access information includes: a sequence number of the superframe that sends the preamble;

The communication node determines the RA-RNTI based on the random access information.

In an exemplary embodiment, the determining, by the communication node, the RA-RNTI according to the random access information may include: the communication node determining that the RA-RNTI is:

RA_RNTI=n0+k1×HSFN_id;

Where n0 and k1 are coefficients, and HSFN_id is the sequence number of the superframe for transmitting the preamble.

RA_RNTI=n0+k1×f(HSFN_id);

Where n0 and k1 are coefficients, f() represents a function with HSFN_id as input, and HSFN_id is a sequence number of a superframe for transmitting preamble.

RA_RNTI=n0+m×f(ki,C _i );

Where f() represents a function with ki, C _i as input, C _i is random access information, and n0, m, and ki are coefficients.

In an exemplary embodiment, the random access information may include one or a combination of the following:

The sequence number HSFN_id of the superframe that sent the preamble or a function that takes it as input;

The sequence number SFN_id of the radio frame from which the preamble is transmitted or a function that takes it as an input;

The sequence number subSFN_id of the subframe in which the preamble is transmitted or a function that takes as input;

Sending the frequency domain location index f_id of the preamble or a function that takes it as input;

Send the preamble's frequency offset f_offset or a function that takes it as input;

Transmitting the subcarrier index tone_id of the preamble or a function that takes it as input;

Send the preamble's band index band_id or a function that takes it as input;

a PDCCH period of the downlink control channel or a function of the input thereof, wherein the unit of the PDCCH period may be a superframe, a frame, a subframe, a second (s), a millisecond (ms), or other time units;

a PRACH period of the random access channel or a function of the input thereof, wherein the unit of the PRACH period may be a superframe, a frame, a subframe, an s, an ms, or other time unit;

Sending a preamble interval or a function of the preamble, where the interval length can be obtained by calculation or pre-configuration. The unit of the Preamble period can be a PRACH period, a PDCCH period, a super frame, a frame, a subframe, s, ms or other time unit;

The RA response window length W_RAR or a function thereof, wherein the unit of W_RAR may be a PDCCH period, a PRACH period, a superframe, a frame, a subframe, an s, an ms, or other time units;

The maximum length M _{W_RAR of the} RA response window length W_RAR, where the unit of M _{W_RAR} may be a PDCCH period, a PRACH period, a super frame, a frame, a subframe, an s, an ms, or other time units;

The number of radio frames (HSFNnumber) contained in a superframe or a function as input;

The number of effective subframes Rmax in which the downlink control channel search space continues or a function as an input thereof;

The number of repetitions of the downlink control channel, Ri, or a function of its input.

RA-RNTI=n0+k1×band_id+k2×floor(SFN_id/minPeriod)+k2×ceil(HSFNnumber/minPeriod)×(HSFN_id mod M _{W_RAR} );

Where n0 is the coefficient, minPeriod is the minimum period of random access, the unit of minPeriod is the frame, M _{W_RAR} is the maximum length of the RA response window length W_RAR, the unit of M _{W_RAR} is the super frame; floor() means rounding down, Ceil() means round up; ki is a positive integer, i=1, 2; for example, k1 can be 1, and k2 can be the maximum number of bands in the system (eg 4);

The band_id is the frequency band index of the preamble, the SFN_id is the sequence number of the radio frame that transmits the preamble, the HSFNnumber is the number of radio frames included in one superframe, and the HSFN_id is the sequence number of the superframe that transmits the preamble.

RA-RNTI=n0+k1×band_id+k2×floor(SFN_id/minPeriod)+floor(Rmax/z)×[k2×ceil(HSFNnumber/minPeriod)×(HSFN_id mod M _{W_RAR} )],

Where n0 is the coefficient, minPeriod is the minimum period of random access, the unit of minPeriod is the frame, M _{W_RAR} is the maximum length of the RA response window length W_RAR, the unit of M _{W_RAR} is the super frame; floor() means rounding down, Ceil() means round up;

z is a first threshold, and the value ranges from a positive integer. For example, the z value can be one of the following: 2048, 1024, 512, 256, 128, 64.

Where ki can be a positive integer, i=1, 2. For example, k1 can be 1, and k2 can be the maximum number of bands in the system (eg, 4).

Band_id is the frequency band index of the preamble, SFN_id is the sequence number of the radio frame that transmits the preamble, HSFNnumber is the number of radio frames included in one superframe, HSFN_id is the sequence number of the superframe that transmits the preamble, and Rmax is the effective duration of the downlink control channel search space. The number of subframes.

RA-RNTI=n0+k1×band_id+k2×[floor(Rmax/z)×(HSFN_id mod M _{W_RAR} )]+k3×floor(SFN_id/minPeriod),

Where n0 is a coefficient and floor() means rounding down;

Where ki is the maximum value after summing one or more of its previous factors, and ki is a positive integer, i=1, 2, 3. For example, k1 can be 1, and k2 can be the maximum number of bands in the system (eg, 4).

M _{W_RAR} is the maximum length of the RA response window length W_RAR, the band_id is the frequency band index of the preamble, the SFN_id is the sequence number of the radio frame that transmits the preamble, Rmax is the number of valid subframes in the downlink control channel search space, and the HSFN_id is the preamble. The serial number of the superframe, minPeriod is the minimum period of random access.

RA-RNTI=n0+k1×band_id+k2×(HSFN_id mod M _{W_RAR} )+k3×M _{W_RAR} ×floor(SFN_id/minPeriod),

Where n0 is a coefficient, floor() means rounding down; ki is the maximum value after the previous one or more factors are summed, ki is a positive integer, i=1, 2, 3; , k1 can be 1, and k2 can be the maximum number of bands in the system (eg: 4).

M _{W_RAR} is the maximum length of the RA response window length W_RAR, the band_id is the frequency band index of the preamble, the SFN_id is the sequence number of the radio frame that transmits the preamble, the HSFN_id is the sequence number of the super frame that transmits the preamble, and the minPeriod is the random access minimum period.

In an exemplary embodiment, n0 has a value of one.

In an exemplary embodiment, the M _{W_RAR} may be determined according to a PDCCH period of the downlink control channel; M _{W — RAR} is a maximum number of superframes corresponding to the PDCCH period×k, or the M _{W —RAR} is a maximum superframe corresponding to the RAR detection window. Quantity; where k is a coefficient.

In an exemplary embodiment, at least one of the following may be determined according to at least one of a valid subframe number Rmax of the downlink control channel search space, a transmission period of the downlink control channel, and a RAR window length: an RA-RNTI calculation formula, a minPeriod value.

In an exemplary embodiment, determining a value of minPeriod according to at least one of Rmax, a transmission period of a downlink control channel, and a RAR window length may include:

Determine minPeriod as the minimum period of PRACH, for example: 4 radio frames; or,

Determine minPeriod according to the value of Rmax; for example, when Rmax is greater than x1, minPeriod is 16, 32, 64, 128, 256, 512, and when Rmax is less than or equal to x1, minPeriod is 4; or,

The minPeriod is determined according to the value of the transmission period of the downlink control channel; for example, when the transmission period of the downlink control channel is greater than x2, the minPeriod is 32, 64, 128, 256, 512, and the transmission period of the downlink control channel is less than or equal to x2, minPeriod Is 4; or,

The value of minPeriod is determined according to the RAR window length; for example, the RAR window length is greater than x3, the minPeriod is 32, 64, 128, 256, 512, the RAR window length is less than or equal to x3, and the minPeriod is 4.

In an exemplary embodiment, x1 may be 128, x2 may be 512, and x3 may be 512 radio frames.

In an exemplary embodiment, determining the RA-RNTI calculation formula according to at least one of Rmax, a transmission period of the downlink control channel, and a RAR window length may include:

The RA-RNTI calculation formula is determined according to Rmax; for example, when Rmax is greater than x1, the RA-RNTI is determined according to the superframe, the frame, and the band_id, and when Rmax is less than or equal to x1, the RA-RNTI is determined according to the frame and the band_id;

Or determining the RA-RNTI calculation formula according to the transmission period of the downlink control channel; for example, when the transmission period of the downlink control channel is greater than x2, the RA-RNTI determines according to the superframe, the frame, and the band_id, and the transmission period of the downlink control channel is less than or equal to x2. The RA-RNTI is determined according to the frame and the band_id;

Or, the RA-RNTI calculation formula is determined according to the RAR window length; for example, the RAR window length is greater than x3, the RA-RNTI is determined according to the super frame, the frame, and the band_id, and the RAR window length is less than or equal to x3, and the RA-RNTI is determined according to the frame and the band_id.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical units; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and nonvolatile, implemented in any method or technology for storing information, such as computer readable instructions, data structures, program modules or other data. Sex, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The basic principles and main features of the present application and the advantages of the present application are shown and described above. The present application is not limited by the above-described embodiments, and the above-described embodiments and the description are only for explaining the principles of the present application, and various changes and modifications may be made to the present application without departing from the spirit and scope of the application. And improvements are within the scope of the claimed invention.

Industrial applicability

An embodiment of the present application provides a random access method and apparatus, and by introducing a factor that reflects a difference in a starting radio frame of a preamble or a frequency domain location index information that transmits a preamble in a calculation formula of the RA-RNTI, ensuring that the terminal is When the RA response windows overlap, no additional collisions occur and the terminal consumes less power.

Claims

A random access method, including:

The communication node acquires the random access information, where the random access information includes: a sequence number of the subframe in which the preamble is transmitted, and a sequence number of the radio frame in which the preamble is transmitted;

The communication node determines a random access radio network temporary identifier RA-RNTI according to the random access information.
The random access method according to claim 1, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+t_id+k1×u_id;

Where n0 and k1 are coefficients, t_id is the sequence number of the starting subframe in which the preamble is transmitted, and u_id is the sequence number of the starting radio frame in which the preamble is transmitted.
The random access method according to claim 1, wherein the random access information further comprises one or a combination of the following: a random access RA response window length, and an interval length of the preamble, the interval length may be calculated or Pre-configured.
The random access method according to claim 3, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+t_id+k1×v_id;

Where n0 and k1 are coefficients, t_id is the sequence number of the starting subframe in which the preamble is transmitted, and v_id is a comprehensive factor determined according to one or a combination of the following:

The sequence number of the initial radio frame to which the preamble is sent;

RA response window length;

The interval length at which the preamble is sent, which can be obtained by calculation or pre-configuration.
The random access method according to claim 4, wherein

V_id=u_id mod WLen; or,

V_id=u_id mod(WLen/10); or,

V_id=(u_id×10) mod WLen;

Where u_id is the sequence number of the starting radio frame of the preamble, and WLen is the length of the RA response window, in units of subframes, and mod represents modulo.
The random access method according to claim 4, wherein

V_id=((u_id×10)/PRACHWinLen)mod WLen; or,

V_id=((u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen); or,

V_id=((u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo .
The random access method according to claim 4, wherein

V_id=((u_id×10)/PRACHWinLen)mod WLen; or,

V_id=((u_id×10)/PRACHWinLen)mod ceil(WLen/PRACHWinLen); or,

V_id=((u_id×10)/PRACHWinLen) mod(floor(WLen/PRACHWinLen)+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo , ceil () means rounded up, floor () means rounded down.
The random access method according to claim 4, wherein

V_id=(u_id/PRACHWinLen)mod(WLen/10); or,

V_id=(u_id/PRACHWinLen)mod(WLen/(PRACHWinLen×10)); or,

V_id=(u_id/PRACHWinLen)mod((WLen/(PRACHWinLen×10))+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo .
The random access method according to claim 4, wherein

V_id=(u_id/PRACHWinLen)mod(WLen/10); or,

V_id=(u_id/PRACHWinLen)mod ceil(WLen/(PRACHWinLen×10)); or,

V_id=(u_id/PRACHWinLen)mod(floor(WLen/(PRACHWinLen×10))+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo , ceil () means rounded up, floor () means rounded down.
The random access method according to claim 3, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+(((t_id+u_id×10)/PRACHWinLen)mod WLen); or,

RA_RNTI=n0+(((t_id+u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen)); or,

RA_RNTI=n0+(((t_id+u_id×10)/PRACHWinLen) mod(WLen/PRACHWinLen+1));

The t_id is the sequence number of the starting subframe for transmitting the preamble, the u_id is the sequence number of the starting radio frame for transmitting the preamble, and the length of the interval for transmitting the preamble is the PRACHWinLen. The interval length can be obtained by calculation or pre-configuration, in units of subframes. WLen is the length of the RA response window, mod is the modulo, and n0 is the coefficient.
The random access method according to any one of claims 4 to 6, wherein the PRACHWinLen indicates the interval length at which the preamble is transmitted in the same subframe, that is, the adjacent two preambles transmitted in the same subframe of different radio frames. The length of the interval between frames, or in subframes.
The random access method according to claim 11, wherein the PRACHWinLen indicates the interval length of the preamble transmitted in the same subframe, and the interval length is calculated by:

PRACHWinLen=COM PRACH /N PRACH_PerFrame ;

Where COM PRACH is the least common multiple of P preamble and N PRACH_PerFrame ;

N PRACH_PerFrame indicates the number of physical random access channel PRACH resources configured in each radio frame, and P preamble indicates the repetition factor of the preamble.
The random access method according to any one of claims 4, 6 to 10, wherein

PRACHWinLen=10×P preamble /N PRACH_PerFrame ;

The PRACHWinLen indicates the interval length of the preamble, the N PRACH_PerFrame indicates the number of physical random access channel PRACH resources configured in each radio frame, and the P preamble indicates the repetition factor of the preamble.
The random access method according to any one of claims 4, 6 to 10, wherein the PRACHWinLen indicates the interval length at which the preamble is transmitted, and is determined according to one or a combination of the following:

Physical random access channel PRACH resource starting wireless subframe sequence number;

The number of PRACH resources configured in each radio frame;

a subframe sequence number that can be used to transmit a preamble configured in each radio frame;

Preamble format;

The repeating factor of the preamble.
The random access method according to any one of claims 4 to 6, wherein the PRACHWinLen indicates the interval length of the pre-configured transmission preamble, and the unit may be one of the following: a frame, a subframe, and a maximum number of transmission preambles.
The random access method according to any one of claims 4 to 6, wherein if the sequence number of the radio frame currently available for transmitting the preamble is greater than or equal to MAX FrameIndex - PRACHWinLen, the frames are skipped, and the sequence number is The radio frame of 0 begins to re-detect the radio frame that can be used to transmit the preamble, where MAX FrameIndex is the maximum value of the radio frame number.
The random access method according to any one of claims 5 to 10, wherein WLen is replaced by WLen', wherein WLen' = WLen-2.
The random access method according to any one of claims 2, 4 to 10, wherein n0=1.
The random access method according to any one of claims 2 to 4, wherein k1=10, or k1=1+MAX(t_id), and MAX(t_id) represents a maximum value in a range of values of t_id. T_id is the sequence number of the starting subframe in which the preamble is transmitted.
The random access method according to claim 1, after the communication node determines the RA-RNTI according to the random access information, the random access method further includes: when the determined RA-RNTI exceeds a predetermined value The communication node determines that the RA-RNTI is a predetermined value when the maximum value is within the range.
The random access method according to claim 1, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The calculation of the RA-RNTI also corresponds to the coverage level when one or a combination of the following random access information corresponds to an coverage level: a random access RA response window length, a preamble repetition factor, and a transmission preamble interval length.
A random access method, including:

The communication node obtains the random access information, where the random access information includes: a time domain location index information of the transmitting preamble, and frequency domain location index information of the preamble;

The communication node determines a random access radio network temporary identifier RA-RNTI according to the random access information.
The random access method according to claim 22, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+t_id+k1×v_id+WLen×w_id;

Where n0 and k1 are coefficients, and t_id is a sequence number of a starting subframe in which the preamble is transmitted;

W_id is a frequency domain location index for sending a preamble;

WLen is the random access RA response window length;

V_id is a composite factor determined according to one or a combination of the following:

The serial number of the radio frame to which the preamble is sent;

Physical random access channel PRACH resource starting wireless subframe sequence number;

RA response window length;

The interval length at which the preamble is sent, which can be obtained by calculation or pre-configuration.
The random access method according to claim 23, wherein

V_id=(u_id/PRACHWinLen)mod(WLen/10); or,

V_id=(u_id/PRACHWinLen)mod ceil(WLen/(PRACHWinLen×10)); or,

V_id=(u_id/PRACHWinLen)mod(floor(WLen/(PRACHWinLen×10))+1);

Where u_id is the sequence number of the starting radio frame for transmitting the preamble, and PRACHWinLen is the interval length for transmitting the preamble. The interval length can be obtained by calculation or pre-configuration. WLen is the length of the RA response window, in units of subframes, mod indicates modulo , ceil () means rounded up, floor () means rounded down.
The random access method according to claim 24, wherein PRACHWinLen represents an interval length of the preamble transmitted in the same subframe, that is, an interval length between adjacent two preambles transmitted in the same subframe of different radio frames, to The frame is in units or in units of subframes.
The random access method according to claim 25, wherein the PRACHWinLen indicates the interval length of the preamble transmitted in the same subframe, and the interval length is calculated by:

PRACHWinLen=COM PRACH /N PRACH_PerFrame ;

Where COM PRACH is the least common multiple of P preamble and N PRACH_PerFrame ;

N PRACH_PerFrame indicates the number of physical random access channel PRACH resources configured in each radio frame, and P preamble indicates the repetition factor of the preamble.
The random access method according to claim 24, wherein WLen is replaced by WLen', wherein WLen' = n0 + MAX(t_id) + k1 × MAX(u_id), and MAX(t_id) represents a range of values of t_id The maximum value, MAX (u_id) represents the maximum value in the range of u_id, u_id is the sequence number of the starting radio frame for transmitting the preamble, and t_id is the sequence number of the starting subframe for transmitting the preamble.
The random access method according to claim 23 or 27, wherein n0=1, k1=10, or k1=1+MAX(t_id), MAX(t_id) represents a maximum value in a range of values of t_id, t_id The sequence number of the starting subframe for which the preamble is sent.
The random access method according to claim 22, after the determining, by the communication node, the RA-RNTI according to the random access information, the random access method further comprises: when the determined RA-RNTI exceeds a predetermined value The communication node determines that the RA-RNTI is a predetermined value when the maximum value is within the range.
The random access method according to claim 22, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

When one or a combination of the following random access information corresponds to a coverage level: a random access RA response window length, a preamble repetition factor, and a preamble interval length,

Then the calculation of the RA-RNTI also corresponds to the coverage level.
A random access method, including:

The communication node acquires the random access information, where the random access information includes: the time domain location index information of the terminal transmitting the preamble, and the frequency domain location index information of the preamble sent by the terminal;

The communication node determines a random access radio network temporary identifier RA-RNTI according to the random access information.
The random access method according to claim 31, wherein the random access information further comprises one or a combination of the following: a random access RA response window length, and an interval length of the preamble, the interval length may be calculated or Pre-configured.
The random access method according to claim 32, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+s_id+w_id×PRACHWinLen;

Where n0 is a coefficient, s_id is a time domain location index of the preamble sent by the terminal, w_id is a frequency domain location index of the preamble sent by the terminal, and PRACHWinLen is a length of the interval for transmitting the preamble, and the interval length can be obtained by calculation or pre-configuration.
The random access method according to claim 33, wherein PRACHWinLen indicates the interval length of the preamble transmitted in the same subframe, that is, the interval length between two adjacent preambles transmitted in the same subframe of different radio frames, The frame is in units or in units of subframes.
The random access method according to claim 34, wherein the PRACHWinLen indicates the interval length of the preamble transmitted in the same subframe, and the interval length is calculated by:

PRACHWinLen=COM PRACH /N PRACH_PerFrame ;

Where COM PRACH is the least common multiple of P preamble and N PRACH_PerFrame ;

N PRACH_PerFrame indicates the number of physical random access channel PRACH resources configured in each radio frame, and P preamble indicates the repetition factor of the preamble.
The random access method according to claim 33, wherein

PRACHWinLen=10×P preamble /N PRACH_PerFrame ;

The PRACHWinLen indicates the interval length of the preamble, the N PRACH_PerFrame indicates the number of PRACH resources configured in each radio frame, and the P preamble indicates the repetition factor of the preamble.
The random access method according to claim 33, wherein the PRACHWinLen indicates the interval length at which the preamble is transmitted, and is determined according to one or a combination of the following:

Physical random access channel PRACH resource starting wireless subframe sequence number;

The number of PRACH resources configured in each radio frame;

a subframe sequence number that can be used to transmit a preamble configured in each radio frame;

Preamble format;

The repeating factor of the preamble.
The random access method according to claim 33, wherein PRACHWinLen represents a length of a pre-configured transmission preamble, and the unit may be one of: a frame, a subframe, and a maximum number of transmission preambles.
The random access method according to claim 31, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+w_id+s_id×PRACHFreLen;

Where n0 is a coefficient, s_id is a time domain location index for transmitting a preamble, w_id is a frequency domain location index for transmitting a preamble, and PRACHFreLen is a frequency domain interval length for transmitting a preamble or a maximum number of preambles that can be transmitted in frequency domain multiplexing.
The random access method according to claim 33 or 39, wherein n0=1.
The random access method according to claim 39, wherein the PRACHFreLen indicates the length of the frequency domain interval for transmitting the preamble, determined according to one of the following information or a combination thereof: physical randomness The access channel can be used to transmit the frequency domain resource configuration information of the preamble and the frequency hopping mode.
The random access method according to any one of claims 31 to 41, wherein the time domain location index information comprises any one of the following:

The sequence number of the subframe in which the preamble is sent;

The sequence number of the radio frame to which the preamble is sent.
The random access method according to any one of claims 31 to 41, wherein the frequency domain location index information comprises any one of the following:

Sending a starting frequency domain location index of the preamble;

Transmitting the frequency domain position offset of the preamble;

Send the frequency domain subcarrier index of the preamble.
The random access method according to claim 31, after the determining, by the communication node, the RA-RNTI according to the random access information, the random access method further comprises: when the determined RA-RNTI exceeds a predetermined value The communication node determines that the RA-RNTI is a predetermined value when the maximum value is within the range.
The random access method according to claim 31, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

When one or a combination of the following random access information corresponds to a coverage level: a random access RA response window length, a preamble repetition factor, and a preamble interval length,

Then the calculation of the RA-RNTI also corresponds to the coverage level.
A random access method, including:

The communication node acquires a random access information correlation factor;

The communication node determines a random access radio network temporary identifier RA-RNTI according to the random access information correlation factor.
The random access method according to claim 46, wherein the determining, by the communication node, the RA-RNTI according to the random access information correlation factor comprises:

The communication node determines that the RA-RNTI is:

Where n0 is a coefficient, N is the number of random access information correlation factors, and c i is a random access information correlation factor,

MAX(c i-1 ) represents the maximum value of c i-1 .
The random access method of claim 47, wherein n0=1.
The random access method according to claim 46, wherein the random access information correlation factor comprises any one of the following or a combination thereof:

The sequence number of the starting subframe in which the preamble is sent;

The sequence number of the initial radio frame to which the preamble is sent;

The number of physical random access channel PRACH resources configured in each radio frame;

Repetitive factor of preamble;

The sequence number of the end subframe in which the preamble is sent;

The sequence number of the end radio frame that sent the preamble;

Transmitting the frequency domain position offset of the preamble;

Transmitting a frequency domain subcarrier index of the preamble;

Random access RA response window length.
The random access method according to claim 46, after the communication node determines the RA-RNTI according to the random access information correlation factor, the random access method further includes: when the determined RA-RNTI exceeds a predetermined When the maximum value is within the range of values, the communication node determines that the RA-RNTI is a predetermined value.
The random access method according to claim 46, wherein the determining, by the communication node, the RA-RNTI according to the random access information correlation factor comprises:

When one or a combination of the following random access information corresponds to a coverage level: a random access RA response window length, a preamble repetition factor, and a preamble interval length,

Then the calculation of the RA-RNTI also corresponds to the coverage level.
A random access device is applied to a communication node, including:

The information obtaining module is configured to acquire random access information, where the random access information includes: a sequence number of a subframe in which the preamble is transmitted, and a sequence number of the radio frame in which the preamble is transmitted;

And a processing module, configured to determine a random access radio network temporary identifier RA-RNTI according to the random access information.
A random access method, including:

The communication node acquires random access information;

The communication node determines random access response window related information according to the random access information.
The random access method according to claim 53, wherein the random access information comprises one or a combination of the following:

Downstream channel repetition information or a function that takes it as input;

a downlink control channel transmission period PDCCH period or a function as an input thereof;

Downlink control channel transmission interval PDCCH transmission duration or a function as an input thereof;

a downlink shared channel transmission period PDSCH period or a function as an input thereof;

Downlink shared channel transmission interval PDSCH transmission duration or a function as an input thereof;

Upstream channel repetition information or a function that takes it as input;

Uplink access channel transmission period PRACH period or a function taking it as input;

The uplink access channel transmission interval PRACH transmission duration or a function as an input.
The random access method according to claim 53, wherein the random access response window related information comprises:

Random access response window start time;

The time domain location at which the random access response window starts;

The interval between the start time of the random access response window and the end time of the preamble transmission.
A random access method, including:

The communication node acquires random access information, where the random access information includes: a sequence number of a superframe that transmits a preamble preamble;

The communication node determines a random access radio network temporary identifier RA-RNTI according to the random access information.
The random access method according to claim 56, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+k1×HSFN_id;

Where n0 and k1 are coefficients, and HSFN_id is the sequence number of the superframe for transmitting the preamble.
The random access method according to claim 56, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+k1×f(HSFN_id);

Where n0 and k1 are coefficients, f() represents a function with HSFN_id as input, and HSFN_id is a sequence number of a superframe for transmitting preamble.
The random access method according to claim 56, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA_RNTI=n0+m×f(ki,C i );

Where f() represents a function with ki, C i as input, C i is random access information, and n0, m, and ki are coefficients.
The random access method according to any one of claims 56 to 59, wherein the random access information comprises one or a combination of the following:

The sequence number HSFN_id of the superframe that sent the preamble or a function that takes it as input;

The sequence number SFN_id of the radio frame from which the preamble is transmitted or a function that takes it as an input;

The sequence number subSFN_id of the subframe in which the preamble is transmitted or a function that takes as input;

Sending the frequency domain location index f_id of the preamble or a function that takes it as input;

Send the preamble's frequency offset f_offset or a function that takes it as input;

Transmitting the subcarrier index tone_id of the preamble or a function that takes it as input;

Send the preamble's band index band_id or a function that takes it as input;

a transmission period PDCCH period of the downlink control channel or a function as an input thereof;

a random access channel PRACH period or a function that takes it as an input;

Sending a preamble interval length or a function as an input, the interval length can be obtained by calculation or pre-configuration;

Random access RA response window length W _ RAR or a function with it as input;

RA response window length W _ RAR sustained maximum length M W_RAR ;

The number of radio frames HSFN number contained in a superframe or a function of its input;

The number of effective subframes Rmax in which the downlink control channel search space continues or a function as an input thereof;

The number of repetitions of the downlink control channel, Ri, or a function of its input.
The random access method according to any one of claims 56 to 60, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA-RNTI=n0+k1×band_id+k2×floor(SFN_id/minPeriod)+k2×ceil(HSFNnumber/minPeriod)×(HSFN_id mod M W_RAR );

Where n0 is a coefficient, minPeriod is a minimum period of random access, the unit of minPeriod is a frame, M W_RAR is a maximum length of the length of the RA response window W _ RAR, and the unit of M W_RAR is a super frame;

Ki is a positive integer, i=1, 2;

Floor() means rounding down, and ceil() means rounding up;

The band_id is the frequency band index of the preamble, the SFN_id is the sequence number of the radio frame that transmits the preamble, the HSFNnumber is the number of radio frames included in one superframe, and the HSFN_id is the sequence number of the superframe that transmits the preamble.
The random access method according to any one of claims 56 to 60, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA-RNTI=n0+k1×band_id+k2×floor(SFN_id/minPeriod)+floor(Rmax/z)×[k2×ceil(HSFNnumber/minPeriod)×(HSFN_id mod M W_RAR )],

Where n0 is a coefficient, minPeriod is a minimum period of random access, the unit of minPeriod is a frame, M W_RAR is a maximum length of the length of the RA response window W _ RAR, and the unit of M W_RAR is a super frame;

z is the first threshold, and the value ranges from a positive integer;

Ki is a positive integer, i=1, 2;

Floor() means rounding down, and ceil() means rounding up;

Band_id is the frequency band index of the preamble, SFN_id is the sequence number of the radio frame that transmits the preamble, HSFNnumber is the number of radio frames included in one superframe, HSFN_id is the sequence number of the superframe that transmits the preamble, and Rmax is the effective duration of the downlink control channel search space. The number of subframes.
The random access method according to any one of claims 56 to 60, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA-RNTI=n0+k1×band_id+k2×[floor(Rmax/z)×(HSFN_id mod M W_RAR )]+k3×floor(SFN_id/minPeriod),

Where n0 is a coefficient, z is a first threshold, and the value range is a positive integer;

The value of ki is the maximum value after the sum of one or more factors before it, ki is a positive integer, i=1, 2, 3;

Floor() means rounding down;

M W_RAR is the maximum length of the RA response window length W _ RAR, band_id is the frequency band index of the preamble, SFN_id is the sequence number of the radio frame transmitting the preamble, Rmax is the number of valid subframes in the downlink control channel search space, and HSFN_id is the transmission. The sequence number of the preamble superframe, minPeriod is the minimum period of random access.
The random access method according to any one of claims 56 to 60, wherein the determining, by the communication node, the RA-RNTI according to the random access information comprises:

The communication node determines that the RA-RNTI is:

RA-RNTI=n0+k1×band_id+k2×(HSFN_id mod M W_RAR )+k3×M W_RAR ×floor(SFN_id/minPeriod),

Where n0 is a coefficient, the value of ki is the maximum value after the sum of one or more factors before it, ki is a positive integer, i=1, 2, 3; floor() means rounding down;

M W_RAR is the maximum length of the RA response window length W _ RAR, band_id is the frequency band index of the preamble, SFN_id is the sequence number of the radio frame transmitting the preamble, HSFN_id is the sequence number of the super frame transmitting the preamble, and minPeriod is the minimum period of the random access. .
The random access method according to any one of claims 56 to 64, wherein the value of n0 is 1.
The random access method according to any one of claims 56 to 64, wherein M W_RAR is determined according to a transmission period PDCCH period of the downlink control channel; M W_RAR is a maximum number of super frames corresponding to PDCCH period × k, or M W_RAR The number of maximum superframes corresponding to the random access response RAR detection window, where k is a coefficient.
The random access method according to any one of claims 56 to 66, wherein at least the effective subframe number Rmax of the downlink control channel search space, the transmission period of the downlink control channel, and the random access response RAR window length are at least At least one of the following is determined: the RA-RNTI calculation formula, the random access minimum period minPeriod value.
The random access method according to claim 67, wherein the determining the minPeriod value according to at least one of the effective subframe number Rmax, the downlink control channel transmission period, and the RAR window length of the downlink control channel search space, including :

Determine minPeriod as the minimum period of PRACH; or,

Determine minPeriod according to the value of Rmax; or,

Determining minPeriod according to the value of the transmission period of the downlink control channel; or

The minPeriod is determined according to the RAR window length.
The random access method according to claim 67, wherein the RA-RNTI calculation formula is determined according to at least one of a valid subframe number Rmax, a downlink control channel transmission period, and an RAR window length of the downlink control channel search space. ,include:

Determine the RA-RNTI calculation formula based on Rmax; or,

Determining an RA-RNTI calculation formula according to a transmission period of the downlink control channel; or

The RA-RNTI calculation formula is determined according to the RAR window length.
The random access method according to any one of claims 61 to 64, wherein k1 is 1, and k2 is the maximum number of band bands in the system.
The random access method according to claim 62 or 63, wherein the value range of z comprises: 2048, 1024, 512, 256, 128, 64.