CN111278151B

CN111278151B - Random access method, network side equipment and terminal

Info

Publication number: CN111278151B
Application number: CN201811584267.4A
Authority: CN
Inventors: 刘思綦; 鲍炜; 沈晓冬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2018-12-24
Filing date: 2018-12-24
Publication date: 2021-09-28
Anticipated expiration: 2038-12-24
Also published as: WO2020134809A1; CN111278151A

Abstract

The embodiment of the invention provides a random access method, network side equipment and a terminal, wherein the random access method applied to the network side equipment comprises the following steps: m RARs are fed back aiming at a first preamble detected on an RO on a PRACH time domain resource, wherein M is a positive integer and is more than or equal to 1. In the embodiment of the invention, how a network side device detects a certain preamble on the RO of a PRACH time domain resource is determined to process so as to reduce the system overhead, and how a terminal monitors RAR fed back by the network side device so as to ensure the success rate of random access.

Description

Random access method, network side equipment and terminal

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to a random access method, network side equipment and a terminal.

Background

The preamble portion in message 1(msg1) in the New Radio (NR) introduces two kinds of sequences, 139 and 839. For long sequences L839, the subcarrier spacing of msg1 may be 1.25kHz or 5 kHz. For a short sequence L139, the subcarrier spacing for msg1 may be 15/30/60/120/kHz. RO (PRACH transmission occasion, physical random access channel transmission occasion, or PRACH occasion, physical random access channel occasion) is defined as a time-frequency resource required for transmitting msg1 of a given format (format), and the bandwidth occupied by one RO at different subcarrier spacing (SCS) is as shown in table 1:

TABLE 1

A PRACH time domain resource refers to a time domain resource (also referred to as a PRACH time point) occupied by one RO, on which only one RO or multiple ROs are FDM (Frequency-Division Multiplexing) in the Frequency domain. In NR R15, a maximum of 8 ROs at a PRACH time point are allowed to FDM in the frequency domain, and the frequency domains are continuous, but a user can only select one RO to transmit one msg1 at a time point. After receiving one msg1, the base station may feed back a Random Access Response (RAR), and a Physical Downlink Control Channel (PDCCH) of the RAR may be scrambled by a Random Access Radio Network Temporary Identifier (RA-RNTI).

In R15, for a Preamble detected on an RO, the network may feed back an RAR, and for the detected Preamble x, the RAR may include a MAC sub pdu (MAC sub pdu with Random Access Preamble identifier) corresponding to the Preamble x, where the sub pdu includes a RAPID corresponding to the Preamble x. One RAR may contain sub-pdus corresponding to different preambles detected on the RO. Therefore, the RAR for preamble x refers to an RAR including a sub pdu corresponding to a RAPID corresponding to preamble x, and the RAR may correspond to a plurality of different preambles at the same time.

In some unlicensed bands, the terminal needs to Listen Before Talk (LBT) first, and it is determined that the resource is idle Before it can be used. The LBT is required to be performed by the terminal/base station according to the unit of 20MHz, so that the frequency domain resource successfully acquired by the terminal/base station is also an integer multiple of 20 MHz. When a terminal/base station transmits a signal in an Occupied resource, it is necessary to ensure that a Nominal Channel Bandwidth (e.g., 20MHz) has an occupancy rate (Occupied Channel Bandwidth, OCB) of 80%.

According to the definition of R15NR, the frequency domain bandwidth of an RO may not meet the OCB requirement on the unlicensed band, so that the terminal cannot normally use the resource even if it is seized. One solution is: the user simultaneously transmits a plurality of msg1 on a plurality of FDM ROs, and the frequency domain span occupied by the RO used by two msg1 with the farthest frequency domain distance in the plurality of msg1 can meet the OCB requirement. At this time, the base station may receive multiple identical msg1 of the same terminal from different ROs at a time point, and according to the design of R15, an RA-RNTI is calculated based on each RO and an RAR is fed back, which causes extra overhead, and terminals receiving multiple RARs are easy to confuse, thereby causing a problem of random access failure.

Disclosure of Invention

The embodiment of the invention provides a random access method, network side equipment and a terminal, which are used for solving the problems that the conventional random access method is high in system overhead and easy to fail.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a random access method, applied to a network side device, including:

m RARs are fed back aiming at a first preamble detected on an RO on a PRACH time domain resource, wherein M is a positive integer and is more than or equal to 1.

In a second aspect, an embodiment of the present invention provides a random access method, applied to a terminal, including:

sending S preambles on the RO on one PRACH time domain resource;

monitoring at least one RAR in M RARs fed back by the network side equipment aiming at a first preamble in the S preambles;

wherein S and M are positive integers, S is greater than 1, and M is greater than or equal to 1.

In a third aspect, an embodiment of the present invention provides a network side device, including:

the feedback module is used for feeding back M RARs aiming at a first preamble detected on an RO on a PRACH time domain resource, wherein M is a positive integer and is more than or equal to 1.

In a fourth aspect, an embodiment of the present invention provides a terminal, including:

a sending module, configured to send S preambles on an RO on one PRACH time domain resource;

a monitoring module, configured to monitor at least one RAR of M RARs fed back by a network side device for a first preamble of the S preambles;

In a fifth aspect, an embodiment of the present invention provides a network-side device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the random access method applied to the network-side device.

In a sixth aspect, an embodiment of the present invention provides a terminal, including a processor, a memory, and a computer program stored in the memory and being executable on the processor, where the computer program, when executed by the processor, implements the steps of the random access method applied to the terminal.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the random access method are implemented.

In the embodiment of the invention, how a network side device detects a certain preamble on the RO of a PRACH time domain resource is determined to process so as to reduce the system overhead, and how a terminal monitors RAR fed back by the network side device so as to ensure the success rate of random access.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;

fig. 2 is a flowchart illustrating a random access method applied to a network side device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of information included in an RAR according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a random access method applied to a terminal according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating that a terminal according to an embodiment of the present invention sends preambles on multiple ROs on one PRACH time domain resource;

fig. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a terminal according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of a network-side device according to another embodiment of the present invention;

fig. 10 is a schematic structural diagram of a terminal according to yet another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, 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. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

Embodiments of the present invention are described below with reference to the accompanying drawings. The random access method, the network side equipment and the terminal provided by the embodiment of the invention can be applied to a wireless communication system. The wireless communication system may adopt a 5G system, or an Evolved Long Term Evolution (lte) system, or a subsequent Evolved communication system.

Referring to fig. 1, an architecture diagram of a wireless communication system according to an embodiment of the present invention is shown. As shown in fig. 1, the wireless communication system may include: a network side device 11 and a terminal 12, wherein the terminal 12 can be connected with the network side device 11. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 illustrates the connections between the devices by solid lines for convenience and convenience in visual representation.

It should be noted that the communication system may include a plurality of terminals 12, and the network side device 11 may communicate (transmit signaling or transmit data) with the plurality of terminals 12.

The network side device 11 provided in the embodiment of the present invention may be a base station, which may be a commonly used base station, an evolved node base station (eNB), or a network side device in a 5G system (for example, a next generation base station (gNB), a Transmission and Reception Point (TRP), or a cell) and the like. Or a network side device in a subsequent evolution communication system. The terms are not intended to be limiting.

The terminal 12 provided in the embodiment of the present invention may be a Mobile phone, a tablet computer, a notebook computer, an Ultra-Mobile personal computer (UMPC), a netbook, a Personal Digital Assistant (PDA), or the like. Those skilled in the art will recognize that the words are not limiting.

Referring to fig. 2, fig. 2 is a flowchart illustrating a random access method according to an embodiment of the present invention, where the random access method is applied to a network device, and includes:

step 21: m RARs are fed back aiming at a first preamble detected on an RO on a PRACH time domain resource, wherein M is a positive integer and is more than or equal to 1.

In the embodiment of the present invention, the first preamble refers to a certain specific preamble sequence or specific preamble sequences. The first preamble may be used for random access or request system message transmission (OSI request).

In the embodiment of the invention, how to process the network side equipment after detecting a certain preamble on the RO on a PRACH time domain resource is determined, so as to reduce the system overhead.

In some embodiments of the present invention, M RARs are fed back for N first preambles detected on an RO on the PRACH time domain resource, where N is a positive integer, and 1 ≦ M ≦ N.

That is to say, after detecting multiple identical first preambles on the RO on one PRACH time domain resource, the network side device feeds back M RARs, instead of feeding back one RAR for each first preamble when detecting multiple identical first preambles on the RO on one PRACH time domain resource, thereby achieving the purpose of reducing system overhead.

In this embodiment of the present invention, the N first preambles may be detected from the same RO or different ROs on the PRACH time domain resource. That is, the N first preambles may be detected on the same RO or may be detected on different ROs.

In some preferred embodiments of the present invention, if N is 1, then M is 1, that is, if 1 first preamble detected on the RO on one PRACH time domain resource, then 1 RAR is fed back, thereby reducing system overhead.

In some embodiments of the present invention, if N >1, then 1 ≦ M ≦ N.

In some embodiments of the present invention, if N (N >1) identical first preambles are detected on an RO on the PRACH time domain resource, the N first preambles are considered to be from the same terminal, and M RARs are fed back.

In some preferred embodiments of the present invention, if N (N >1) identical first preambles are detected on an RO on the PRACH time domain resource, it is considered that the N first preambles are from the same terminal, and 1 RAR is fed back, thereby reducing system overhead.

In the embodiment of the present invention, the value of M may be configured by the network side device, predefined by a protocol, or indicated by a terminal.

When the value of M is predefined by the protocol, it may be predefined as M-1, or M-N.

In some embodiments of the present invention, a terminal may send multiple different preambles at the same time, and if feedback is performed on different preambles, confusion may be caused, so that a network side device may feed back a RAR only for a part of ROs on one PRACH time domain resource, thereby improving processing efficiency of the network side device, for example, the RO may be at least one of:

the RO with the highest frequency domain on the PRACH time domain resource;

the lowest RO of the frequency domain on the PRACH time domain resource;

the RO is specified.

The designated RO may be a partial or full RO on a PRACH time domain resource.

For example, in some embodiments of the present invention, the network side device may feed back RAR for the highest RO in frequency domain and the lowest RO in frequency domain on one PRACH time domain resource.

In this embodiment of the present invention, the feeding back the M RARs may include: determining RA-RNTIs for scrambling PDCCHs of the M RARs.

In some embodiments of the invention, the RA-RNTIs used for scrambling the PDCCHs of the M RARs are the same if M > 1.

In some embodiments of the invention, the RA-RNTIs used for scrambling the PDCCHs of the M RARs are different if M > 1.

In some embodiments of the present invention, RA-RNTI of PDCCH for scrambling the RAR is independent of frequency domain of RO and is only dependent on time domain of RO, and in this case, the feeding back M RARs may include: and determining RA-RNTIs of PDCCHs used for scrambling the M RARs according to the detected time domain information of the RO of the first preamble and the corresponding relation between the time domain information of the RO and the RA-RNTIs. For example, the PRACH time domain resources t1, t2, and t3 correspond to RA-RNTI1, RA-RNTI2, and RA-RNTI3, respectively, and if the first preamble is received at time t1, the PDCCH of the RAR is scrambled by RA-RNTI1, if the first preamble is received at time t2, the PDCCH of the RAR is scrambled by RA-RNTI2, and if the first preamble is received at time t3, the PDCCH of the RAR is scrambled by RA-RNTI 3.

In the embodiment of the invention, the corresponding relation between the time domain information of the RO and the RA-RNTI is configured by the network side equipment, predefined by a protocol or indicated by a terminal.

In some further embodiments of the invention, the RA-RNTI for the PDCCH scrambling the RAR may be calculated using the following formula:

RA-RNTI ═ 1 × C1+ s _ id × C2+ symbol × t _ id × C3+ symbol × a × f _ id × C4+ symbol × a × B × ul _ carrier _ id × C5+ C6 … … … … … … … … … … … … … … … … … … (formula 1)

Wherein Symbol is the number of symbols in a first given time, and the first given time is at least one slot, at least one millisecond, at least one subframe, the time domain length of at least one RO, at least one frame or at least one time window;

s _ id is an Orthogonal Frequency Division Multiplexing (OFDM) symbol number where a first symbol of the PRACH time domain resource is located;

t _ id is a time slot number where a first time slot of the PRACH time domain resource is located within a second given time, where the second given time is at least one time slot, at least one millisecond, at least one subframe, a time domain length of at least one RO, at least one frame, or at least one time window;

f _ id is equal to B, or f _ id is configured by the network side equipment, or f _ id is a preset value, or f _ id is indicated by the terminal, or f _ id is the number of the RO used by the terminal for sending the first preamble on the frequency domain;

a is configured by the network side equipment, or A is a preset value, or A is indicated by a terminal, or A is the number of time slots contained in a given time window;

b is configured by the network side equipment, or B is a preset value, or B is indicated by a terminal, or B is the number of ROs for FDM on the PRACH time domain resource;

ul _ carrier _ id is configured by the network side device, or ul _ carrier _ id is a preset value, or ul _ carrier _ id is indicated by the terminal, or ul _ carrier _ id is a channel number of an RO used by the terminal to send the first preamble.

Wherein C1, C2, C3, C4, C5 and C6 are integers.

Let RAR window be N × 10ms, and frame number of frame where RO for sending preamble is located is SFN.

In some embodiments of the present invention, C1, C2, C3, C4, and C5 all take the value of 1, and C6 is 0. Equation 1 then is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id + symbol × a × B × ul _ carrier _ id.

In some further embodiments of the present invention, C1 ═ C2 ═ C3 ═ 1, C4 ═ C5 ═ N, and C6 ═ symbol × a × (SFN mod N). Equation 1 then is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id × N + symbol × a × B × ul _ carrier _ id × N + symbol × a × (SFN mod N). Further, if a is 80, symbol is 14, and B is 8, formula 1 is: RA-RNTI + 1+ s _ id +14 × t _ id +14 × 80 × N × f _ id +14 × 80 × 8 × ul _ carrier _ id × N +14 × 80 × (SFN mod N).

Mod is a remainder, and the following examples are the same and will not be repeated.

In some other embodiments of the present invention, C1 ═ C2 ═ C3 ═ C4 ═ 1, C5 ═ N, and C6 ═ symbol × a × B × (SFN mod N), when equation 1 is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id + symbol × a × B × ul _ carrier _ id × N + symbol × a × B × (SFN mod N). Further, if a is 80, symbol is 14, and B is 8, formula 1 is: RA-RNTI + 1+ s _ id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id × N +14 × 80 × 8 × (SFN mod N).

In some further embodiments of the present invention, C1 ═ C2 ═ C3 ═ C4 ═ C5 ═ 1, and C6 ═ symbol × a × B × M _ id × (SFN mod N), where M _ id is the number of ul _ carrier _ id possible values. Equation 1 then is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id + symbol × a × B × ul _ carrier _ id + symbol × a × B × M _ id × (SFN mod N). Further, if a is 80, symbol is 14, B is 8, and ul _ carrier _ id may have only 2 values, i.e., M _ id is 2, formula 1 is RA-RNTI-1 + s _ id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id +14 × 80 × 8 × 2 × (SFN mod N).

Assuming that the PRACH window including the PRACH resource is W × 10ms, and the frame number of the frame where the RO for sending the preamble is located is SFN, some embodiments are similar to the above-mentioned embodiment of RAR window × 10 ms. Specifically, in order to replace (SFN mod N) and N in the above embodiment with (SFN mod W) and W, respectively, the replaced formula may also be used for calculating RA-RNTI, which is not described herein again.

In the following description of formula 1 of the present invention, a case where all of C1, C2, C3, C4, and C5 are taken as 1 and C6 is taken as 0 is further exemplified, but these examples may be adaptively changed for other values of C1, C2, C3, C4, C5, and C6.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id, a, B, and ul _ carrier _ id) in the above formula 1 is configured by the network side device, the method further includes:

sending first configuration information, wherein the first configuration information is used for indicating the value of the first parameter;

wherein the first configuration information is at least one of: physical Broadcast Channel (PBCH), Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), System Information Block one (System Information Block1, SIB1), Reference Signals (RS), Discovery Reference Signal (DRS), SIBs other than the SIB1, and Radio Resource Control (RRC).

The first configuration information is used for displaying or implicitly indicating the value of the first parameter.

The RS may be a Demodulation Reference Signal (DMRS), a CSI Reference Signal (CSI-RS), or the like.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id, a, B, and ul _ carrier _ id) in the above formula 1 is indicated by the terminal, the feeding back M RARs may further include, before:

and determining the value of the first parameter according to the corresponding relation between the first parameter and the first preamble.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id, a, B, and ul _ carrier _ id) in the above formula 1 is indicated by the terminal, if the first preamble is carried in a first message, the first message includes the first preamble and a data part, and before feeding back the M RARs, further including:

determining a value of the first parameter based on a data portion of the first message.

Optionally, the data portion in the first message may directly carry the value of the first parameter, or may carry other data having a corresponding relationship with the value of the first parameter.

Optionally, the first message is MsgA.

In some embodiments of the present invention, f _ id in the above formula 1 is B, and formula 1 becomes:

RA-RNTI＝1+s_id+symbol×t_id+symbol×A×B+symbol×A×B×ul_carrier_id。

in some embodiments of the present invention, when f _ id is a preset value, it may be preset to 0, for example. This time can also be considered as an implementation form of f _ id fixing the frequency domain identity corresponding to the lowest RO. Equation 1 becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × B × ul _ carrier _ id.

In some embodiments of the present invention, when f _ id is a preset value, f _ id may fix a frequency domain identity of an RO corresponding to the highest or lowest frequency domain, or a frequency domain identity of an RO corresponding to an intermediate position, or a frequency domain identity of other predetermined ROs.

In some embodiments of the present invention, B is a preset value, and may be preset to 0, for example. This time can also be considered as an implementation form of B fixing the frequency domain identity corresponding to the lowest RO. Equation 1 becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id.

In some embodiments of the present invention, when B is a preset value, B may fix the frequency domain identifier of the RO corresponding to the highest or lowest frequency domain, or the frequency domain identifier of the RO corresponding to the middle position, or the frequency domain identifiers of other predetermined ROs.

In some embodiments of the present invention, B ═ 8, at which time equation 1 above becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id + symbol × a × 8 × ul _ carrier _ id.

In some embodiments of the present invention, in the above formula 1, a is 80, B is 8, and formula 1 becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × 80 × f _ id + symbol × 80 × 8 × ul _ carrier _ id.

In some embodiments of the present invention, in the above formula 1, a is 80, B is 8, and f _ id is 0, and formula 1 becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × 80 × 8 × ul _ carrier _ id.

In some embodiments of the present invention, ul _ carrier _ id is a preset value, for example, ul _ carrier _ id is 0, and then equation 1 becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id. Further, if f _ id is equal to B, equation 1 becomes: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × B. Or, further, if f _ id is 0, equation 1 becomes: RA-RNTI + symbolxtid 1+ s _ id.

In some embodiments of the invention, the RA-RNTI for the PDCCH scrambling the RAR may also be calculated using the following formula:

RA-RNTI is 1 × D1+ s _ id × D2+ symbol × t _ id × D3+ symbol × a × B × ul _ carrier _ id × D4+ D5 … … … … … … … … … … … … … … … (formula 2)

s _ id is the OFDM symbol number where the first symbol of the PRACH time domain resource is located;

b is configured by the network side equipment, or B is a preset value, or B is indicated by a terminal, or B is the number of the ROs performing Frequency Division Multiplexing (FDM) on the PRACH time domain resource;

Wherein D1, D2, D3, D4 and D5 are integers.

In some embodiments of the present invention, D1, D2, D3 and D4 all take the value of 1, and D5 is 0. In this case, equation 2 is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × B × ul _ carrier _ id.

In some further embodiments of the present invention, D1 ═ D2 ═ D3 ═ 1, D4 ═ N, and D5 ═ symbol × a × (SFN mod N). In this case, equation 2 is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × B × ul _ carrier _ id × N + symbol × a × (SFN mod N). Further, if a is 80, symbol is 14, and B is 8, formula 2 is: RA-RNTI + 1+ s _ id +14 × t _ id +14 × 80 × 8 × ul _ carrier _ id × N +14 × 80 × (SFN mod N). If a is 80, symbol is 14 and B is 1, formula 2 is: RA-RNTI + 1+ s _ id +14 × t _ id +14 × 80 × ul _ carrier _ id × N +14 × 80 × (SFN mod N).

In some further embodiments of the present invention, D1 ═ D2 ═ D3 ═ D4 ═ 1, and D5 ═ symbol × a × B × M _ id × (SFN mod N), where M _ id is the number of possible values of ul _ carrier _ id. In this case, equation 2 is: RA-RNTI + 1+ s _ id + symbol × t _ id + symbol × a × B × ul _ carrier _ id + symbol × a × B × M _ id × (SFN mod N). furthermore, if a is 80, symbol is 14, B is 8, ul _ carrier _ id may have only 2 kinds of values, i.e., M _ id is 2, formula 2 is RA-RNTI + 1+ s _ id +14 × t _ id +14 × 80 × 8 × ul _ carrier _ id +14 × 80 × 8 × 2 × (SFN mod N). If a is 80, symbol is 14, B is 1, ul _ carrier _ id may have only 2 values, i.e., M _ id is 2, then formula 2 is RA-RNTI-1 + s _ id +14 × t _ id +14 × 80 × ul _ carrier _ id +14 × 80 × 2 × (SFN mod N).

In the following description of formula 2 of the present invention, a case where D1, D2, D3, and D4 all take a value of 1 and D5 is 0 is further exemplified, but these examples may be adaptively changed for other values of D1, D2, D3, D4, and D5.

The influence of f _ id on RA-RNTI is excluded from the above calculation formula.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of A, B and ul _ carrier _ id) in the above formula 2 is configured by the network side device, the method further includes:

wherein the first configuration information is at least one of: PBCH, PSS, SSS, SIB1, RS, DRS, other SIBs than the SIB1, and RRC.

The RS may be a DMRS or CSI-RS, etc.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of A, B and ul _ carrier _ id) in the above formula 2 is indicated by the terminal, the feeding back M RARs further includes, before:

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of A, B and ul _ carrier _ id) in the above formula 2 is indicated by the terminal, if the first preamble is carried in a first message, the first message includes the first preamble and a data part, and before feeding back the M RARs, further including:

RA-RNTI ═ 1 × E1+ s _ id × E2+ symbol × t _ id × E3+ E4 … … (formula 3)

Wherein,

symbol is the number of symbols in a first given time, said first given time being at least one slot, at least one millisecond, at least one subframe, the time domain length of at least one RO, at least one frame or at least one time window;

t _ id is a time slot number where a first time slot of the PRACH time domain resource is located within a second given time, where the second given time is at least one time slot, at least one millisecond, at least one subframe, a time domain length of at least one RO, at least one frame, or at least one time window.

Wherein E1, E2, E3, E4 are integers.

In some embodiments of the present invention, E1, E2, E3 all take the value 1, and E4 is 0. Equation 3 then is: RA-RNTI + symbolxtid 1+ s _ id.

In some further embodiments of the present invention, E1 ═ E2 ═ E3 ═ 1, E4 ═ symbol × a × (SFN mod N). Equation 3 then is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × (SFN mod N). Further, if a is 80 and symbol is 14, formula 3 is RA-RNTI-1 + s _ id +14 × t _ id +14 × 80 × (SFN mod N).

In the following description of formula 3 of the present invention, a case where E1, E2, and E3 take a value of 1 and E4 is 0 is further exemplified, but these examples may be adaptively changed for other values of E1, E2, E3, and E4.

The above calculation formula excludes the influence of A on RA-RNTI if E1, E2, E3, E4 and A are irrelevant.

RA-RNTI ═ 1 × F1+ s _ id × F2+ symbol × t _ id × F3+ symbol × a × F _ id × F4+ F5 … … (formula 4)

f _ id is configured by the network side equipment, or f _ id is a preset value, or f _ id is indicated by a terminal;

a is configured by the network side equipment, or A is a preset value, or A is indicated by a terminal, or A is the number of time slots contained in a given time window.

Wherein F1, F2, F3, F4 and F5 are integers.

In some embodiments of the present invention, F1, F2, F3, and F4 all take the value of 1, and F5 is 0. Equation 4 now is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id.

In some further embodiments of the present invention, F1 ═ F2 ═ F3 ═ 1, F4 ═ N, F5 ═ symbol × a × (SFN mod N). Equation 4 now is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id × N + symbol × a × (SFN mod N). Further, if a is 80 and symbol is 14, formula 4 is RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × 80 × N × f _ id +14 × 80 × (SFN mod N).

In some further embodiments of the present invention, F1 ═ F2 ═ F3 ═ F4 ═ 1, and F5 ═ symbol × a × B × (SFN mod N). Equation 4 now is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × f _ id + symbol × a × B × (SFN mod N). Further, if a is 80, symbol is 14, and B is 8, formula 4 is: RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × 80 × N × f _ id +14 × 80 × 8 × (SFN mod N).

The above calculation formula excludes the influence of B on RA-RNTI if F1, F2, F3, F4, F5 and B are irrelevant.

The influence of ul _ carrier _ id on RA-RNTI is excluded from the above calculation formula.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id and a) in the above formula 4 is configured by the network side device, the method further includes:

The RS may be a DMRS or CSI-RS, etc.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id and a) in the above formula 4 is indicated by the terminal, before the feeding back the M RARs, the method further includes:

In some embodiments of the present invention, when a first parameter (the first parameter includes at least one of f _ id and a) in the above formula 4 is indicated by the terminal, if the first preamble is carried in a first message, the first message includes the first preamble and a data part, and before the feeding back the M RARs, the method further includes:

In the above embodiments of the present invention, if Symbol is included in the formula, optionally, the first given time is a timeslot, Symbol is 14.

In the above embodiments of the present invention, if s _ id is included in the formula, optionally, 0 ≦ s _ id < Symbol.

In the above embodiments of the present invention, if t _ id is included in the formula, optionally, 0 ≦ t _ id < a, or 0< t _ id ≦ a, where the value range of t _ id depends on the number of t _ id, if the number starts from 0, 0 ≦ t _ id < a, and if the number starts from 1, 0< t _ id ≦ a; optionally, the second given time window is one PRACH resource time window, for example 10 ms.

In the above embodiments of the present invention, if a is included in the formula, a may be optionally the maximum number of timeslots contained in a given time window.

In the above embodiments of the present invention, if a is included in the formula, optionally, the given time window is, for example, a RAR window, or a window including PRACH time domain resources. For example, the given time window is the maximum window length of one RAR window.

In each of the above embodiments of the present invention, the value of a may be the number of slots included in a window including a PRACH time domain resource, and the SCS of the slots is a maximum configurable SCS value of the PRACH. A window containing PRACH time domain resources is W × 10ms, the maximum preferred SCS of PRACH is R kHz, W × R/15 slots of R kHz are contained in the window, and then a is W × R/15. Note that the maximum assignable SCS may be a maximum assignable SCS of all frequency domains, for example, a maximum assignable SCS of the entire wireless communication frequency domain, or a maximum assignable SCS in a certain frequency domain, for example, a maximum assignable SCS of NRU frequency domain. In some embodiments of the present invention, a-80.

In each of the above embodiments of the present invention, the value of a may be the number of slots included in the RAR window, where the SCS of the slot is the maximum assignable SCS value of the PRACH or the maximum assignable SCS value of the RAR. One RAR window is W × 10ms, the maximum preferred SCS is R kHz, W × R/15 slots of R kHz are included in the RAR window, and a ═ W × R/15. It should be noted that the RAR window length W may be the configured RAR window length or the maximum RAR window length. Note that the maximum assignable SCS may be a maximum assignable SCS of all frequency domains, for example, a maximum assignable SCS of the entire wireless communication frequency domain, or a maximum assignable SCS in a certain frequency domain, for example, a maximum assignable SCS of NRU frequency domain. In some embodiments of the invention, the RAR maximum window length is N × 10ms, the maximum SCS is 120kHz, and a × N × 80.

In the above embodiments of the present invention, the value of a may be related to the frequency band, for example, taking N × 80 and 80 in the authorized and authorized frequency bands, respectively.

In each of the above embodiments of the present invention, if the formula includes B, optionally, B is the maximum number of ROs performing FDM on the PRACH time domain resource.

In some embodiments of the present invention, at least one of the information carried by the M RARs is the same, and the information is at least one of:

timing advance information such as Timing advance command (Timing advance command);

a terminal identity, such as a temporary Cell radio network temporary identity (TC-RNTI);

and an uplink scheduling grant, such as a UL-grant.

In this embodiment of the present invention, the UL-grant carried by the RAR may include at least one of the following:

channel id, e.g., subchannel id used for scheduled uplink transmission;

bandwidth Part (BWP) id, e.g., BWP id used for scheduled upstream transmission.

In some preferred embodiments of the present invention, the above information carried by the M RARs is the same, so as to avoid terminal confusion.

In some embodiments of the invention, the RAR may contain information as shown in figure 3.

In some embodiments of the present invention, before feeding back the M RARs, the method further includes:

and sending second configuration information, wherein the second configuration information is used for indicating the terminal to send S preambles on the RO on one PRACH time domain resource, S is a positive integer and is greater than 1.

Preferably, the second configuration information is used to instruct the terminal to send S identical preambles on an RO on one PRACH time domain resource.

Referring to fig. 4, fig. 4 is a flowchart illustrating a random access method according to another embodiment of the present invention, where the random access method is applied to a terminal, and includes:

step 41: sending S preambles on the RO on one PRACH time domain resource;

step 42: monitoring at least one RAR in M RARs fed back by the network side equipment aiming at a first preamble in the S preambles;

In the embodiment of the invention, the terminal can send a plurality of preambles on the RO on one PRACH time domain resource, so that when a frequency band (such as an unauthorized frequency band) with OCB requirements is preempted, the OCB requirements on the unauthorized frequency band can be met, the random access is normally carried out, how the terminal monitors RAR is determined, the confusion of the terminal is avoided, and the success rate of the random access is improved.

In some preferred embodiments of the present invention, the terminal sends S identical preambles on an RO on one PRACH time domain resource, that is, the S identical preambles are all the aforementioned first preambles. Sending the same preamble can reduce the complexity of random access of the terminal.

Of course, in some other embodiments of the present invention, the terminal may also send S different preambles on the RO on one PRACH time domain resource, or at least two preambles of the S preambles are different.

In some embodiments of the present invention, the monitoring network device includes, for a first preamble of the S preambles, at least one RAR of the M RARs fed back by the monitoring network device, that:

if T RARs fed back by a first preamble in the S preambles are monitored in an RAR receiving window, ending the monitoring, wherein T is 1, or T is S, or T is M, or T is other defined values;

otherwise, the random access is considered to fail.

That is, in some embodiments, if 1 RAR fed back for the first preamble of the S preambles is monitored within the RAR reception window, the monitoring is ended. This situation can be used when the RA-RNTI of the PDCCH of the M RARs fed back by the network side device for the first preamble is the same, and at this time, the terminal monitors one RAR and ends the monitoring, thereby reducing the complexity.

In some embodiments, if S RARs fed back for a first preamble of the S preambles are monitored within the RAR reception window, the monitoring is ended.

In some embodiments, if M RARs fed back for a first preamble of the S preambles are monitored within the RAR reception window, the monitoring is ended. M is all RARs fed back by the network side device for the first preamble.

In some embodiments of the present invention, if T RARs fed back for a first preamble of the S preambles are monitored within the RAR receiving window, the method further includes:

if T >1 and at least one piece of information carried by the T RARs is different, one piece of information carried by the T RARs is selected.

That is to say, when monitoring a plurality of RARs carrying different information, the terminal may select one from the plurality of RARs, so as to avoid terminal confusion.

In some embodiments of the invention, the information carried in the RAR is at least one of:

timing advance information, such as TA;

a terminal identity, such as TC-RNTI;

and an uplink scheduling grant, such as a UL-grant.

channel id, e.g., subchannel id used for scheduled uplink transmission;

BWP id, e.g. used for scheduled upstream transmission.

In some preferred embodiments of the present invention, the above-mentioned information carried by the T RARs is the same, so as to reduce the processing complexity of the terminal.

In some embodiments of the present invention, the RA-RNTI of the PDCCH for scrambling the RAR is independent of the frequency domain of the RO and is only dependent on the time domain of the RO, and in this case, the random access method may further include:

and determining an RA-RNTI for descrambling the PDCCH of the at least one RAR according to the time domain information of the RO for sending the first preamble and the corresponding relation between the time domain information of the RO and the RA-RNTI.

In some further embodiments of the invention, the RA-RNTI for descrambling the PDCCH of the at least one RAR may be calculated using the following formula:

a is configured by the network side equipment, or A is a preset value, or A is indicated by the terminal, or A is the number of time slots contained in a given time window;

b is configured by the network side equipment, or B is a preset value, or B is indicated by the terminal, or B is the number of ROs for FDM on the PRACH time domain resource;

ul _ carrier _ id is configured by the network side device, or ul _ carrier _ id is a preset value, or ul _ carrier _ id is indicated by the terminal, or ul _ carrier _ id is a channel number where an RO used by the terminal to transmit the first preamble is located.

Wherein C1, C2, C3, C4, C5, C6 are integers.

receiving first configuration information, wherein the first configuration information is used for indicating the value of the first parameter;

The RS may be a DMRS or CSI-RS, etc.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id, a, B, and ul _ carrier _ id) in the above formula 1 is indicated by the terminal, the first parameter may have a corresponding relationship with the preamble.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id, a, B, and ul _ carrier _ id) in the above formula 1 is indicated by the terminal, the preamble may be carried in a first message including the first preamble and a data part for determining a value of the first parameter.

Optionally, the first message is MsgA.

RA-RNTI＝1+s_id+symbol×t_id+symbol×A×B+symbol×A×B×ul_carrier_id。

In some embodiments of the invention, the RA-RNTI for descrambling the PDCCH of the at least one RAR may also be calculated using the following formula:

RA-RNTI ═ 1 × D1+ s _ id × D2+ Symbol × t _ id × D3+ Symbol × a × B × ul _ carrier _ id × D4+ D5 … … … … … … … … … … … … … … (formula 2) where Symbol is the number of symbols in a first given time, said first given time being at least one slot, at least one millisecond, at least one subframe, the time domain length of at least one RO, at least one frame or at least one time window;

Wherein D1, D2, D3, D4 and D5 are integers.

The RS may be a DMRS or CSI-RS, etc.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of A, B and ul _ carrier _ id) in the above formula 2 is indicated by the terminal, the first parameter may have a corresponding relationship with the preamble.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of A, B and ul _ carrier _ id) in the above formula 2 is indicated by the terminal, the preamble may be carried in a first message, the first message including the first preamble and a data part, the data part in the first message indicating a value of the first parameter.

Wherein E1, E2, E3, E4 are integers.

In some further embodiments of the present invention, E1 ═ E2 ═ E3 ═ 1, E4 ═ symbol × a × (SFN mod N). Equation 3 then is: RA-RNTI is 1+ s _ id + symbol × t _ id + symbol × a × (SFN mod N), and further, if a is 80 and symbol is 14, formula 3 is RA-RNTI is 1+ s _ id +14 × t _ id +14 × 80 × (SFN mod N).

Wherein F1, F2, F3, F4 and F5 are integers.

The RS may be a DMRS or CSI-RS, etc.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id and a) in the above formula 4 is indicated by the terminal, the first parameter may have a corresponding relationship with the preamble.

In some embodiments of the present invention, when the first parameter (the first parameter includes at least one of f _ id and a) in the above formula 4 is indicated by the terminal, the preamble may be carried in a first message, the first message includes the first preamble and a data part, and the data part in the first message is used for indicating the value of the first parameter.

In some embodiments of the present invention, before the sending S preambles on the RO on one PRACH time domain resource, the method further includes:

and receiving second configuration information, wherein the second configuration information is used for indicating the terminal to send S preambles on the RO on one PRACH time domain resource.

In some embodiments of the present invention, the sending S preambles on the RO on one PRACH time domain resource comprises:

and if the PRACH time domain resource used for random access preempted by the terminal is in the unauthorized frequency band, S preambles are sent on the RO on the PRACH time domain resource by default.

Preferably, the default sending S preambles on the RO on the PRACH time domain resource comprises: s identical preambles are sent on the RO on the PRACH time domain resource by default.

In the embodiment of the invention, when the terminal occupies unauthorized resources for random access, S preambles can be sent on the RO on one PRACH time domain resource, and the frequency domain span occupied by the RO used by the two preambles with the farthest frequency domain distance in the S preambles can meet the OCB requirement of the unauthorized resources. As shown in fig. 5, there are 4 ROs on one PRACH time domain resource, and the distance between the upper boundary of the RO with the highest frequency domain position and the lower boundary of the RO with the lowest frequency domain position satisfies the OCB requirement. At this time, the terminal may select only the two ROs, which are the highest in frequency domain and the lowest in frequency domain, to transmit the preamble, and freely select whether the middle two ROs need to be used for transmitting the preamble as well. For example, the terminal may send preambles from 4 ROs, preferably the 4 preambles being identical, i.e. having the same preamble sequence.

The random access method is described below with reference to specific embodiments.

Embodiment one of the invention

The network side device sends second configuration information to the terminal, where the second configuration information is used to instruct the terminal to send S identical preambles on the RO on one PRACH time domain resource, and the configuration may be carried in SIB1, RRC, or other higher layer signaling.

One implementation way is to add a signaling indication msg1-FDM-repetition to indicate the terminal to select multiple RO repeat transmission preambles on one PRACH time domain resource, and assuming that the selectable value of msg1-FDM-repetition is 1, 2, 4, 8, a possible cell (IE) design form is as follows.

In the embodiment of the present invention, the RACH-ConfigGeneric carries msg1-FDM-repetition as an example, the IE actually carrying msg1-FDM-repetition may depend on the design, and does not exclude the case where other IEs (such as rachconfigugcommon, rachconfiguteddedicate, beamfailurerecoveryconfo, SI-SchedulingInfo) carry msg 1-FDM-repetition.

The second embodiment of the invention:

the terminal 1 selects S1 ROs from the F ROs on one PRACH time domain resource, and sends the same preamble x on the selected RO. The terminal 2 selects S2 ROs from the F ROs on the PRACH time domain resource, and sends the same preamble x on the selected RO.

The network side device receives N identical preamble x from the RO of FDM at the same time.

For preamble x, the network side device replies M RARs, and the RA-RNTI of the PDCCH for scrambling the RARs is calculated as follows: RA-RNTI — 1+ s _ id +14 × t _ id +14 × a × f _ id +14 × a × B × ul _ carrier _ id.

An example is f _ id ═ B, RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × a × B × ul _ carrier _ id. Further, an example is that f _ id is B, and B is 0 by default, and the calculation formula at this time is RA-RNTI — 1+ s _ id +14 × t _ id.

One example is that f _ id is 0 by default, and RA-RNTI is 1+ s _ id +14 × a × B × ul _ carrier _ id.

An example is that M ═ 1, i.e. the network side device replies with an RAR.

Another example is M >1, i.e. the network side device replies with multiple RARs and takes the same value as the RA-RNTI of the PDCCH scrambling the RAR.

The third embodiment of the invention:

for example, a window containing PRACH time domain resources is 10ms, the SCS of the PRACH may be 15kHz, 30kHz, 60kHz, the maximum preferred SCS of the PRACH is 60kHz, and the 10ms window contains 40 slots of 60kHz, where a is 40.

For example, a window containing PRACH time domain resources is 10ms, the SCS of the PRACH may be 15kHz, 30kHz, 60kHz, 120kHz, the maximum preferred SCS of the PRACH is 120kHz, and 80 slots of 120kHz are contained in the 10ms window, where a is 80.

For example, if a RAR window is 20ms long, the SCS of a PRACH may be 15kHz, 30kHz, 60kHz, 120kHz, the maximum preferred SCS of the PRACH is 120kHz, and the 20ms window includes 160 slots at 120kHz, then a is 160.

The fourth embodiment of the present invention:

For preamble x, the network side device replies M RARs, and the RA-RNTI used for scrambling the RAR PDCCH is calculated as follows: RA-RNTI — 1+ s _ id +14 × t _ id +14 × a × f _ id +14 × a × B × ul _ carrier _ id.

An example is ul _ carrier _ id is 0 by default, and the calculation formula at this time is RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × a × f _ id. A further example is that f _ id is B and ul _ carrier _ id is 0 by default, and the formula is RA-RNTI + 1+ s _ id +14 × t _ id +14 × a × B.

An example is that a is taken as the number of slots contained in a window containing PRACH time domain resources, and B is a predetermined value.

An example is that M ═ 1, i.e. the network side device replies with an RAR.

Embodiment five of the present invention:

For preamble x, the network side device replies M RARs, assuming that a is 80 and B is 8, the RA-RNTI for scrambling the RAR PDCCH is calculated as follows:

RA-RNTI＝1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id。

an example is f _ id defaults to 0, when the calculation formula is: RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × 80 × 8 × ul _ carrier _ id.

An example is that M ═ 1, i.e. the network side device replies with an RAR.

In the above embodiments, only a is 80, B is 8, and it is not excluded that a and B take other values, for example, a is 10, 20, 40 …, etc., and B is 0, 1, 2 …, etc.

Sixth embodiment of the present invention:

And for preamble x, the network side equipment replies M RARs.

The RA-RNTI for the PDCCH scrambling the RAR in one example is as follows:

RA-RNTI＝1+s_id+14×t_id+14×A×f_id+14×A×B×ul_carrier_id。

the f _ id and the preamble index have a corresponding relationship, for example, for preamble x, f _ id is y. The calculation formula at this time is RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × a × y +14 × a × B × ul _ carrier _ id.

In another example, f _ id ═ B, the RA-RNTI used to scramble the RAR PDCCH is as follows:

RA-RNTI＝1+s_id+14×t_id+14×A×B+14×A×B×ul_carrier_id。

optionally, at least one of a, B and ul _ carrier _ id has a correspondence with the preamble index:

one example is that a and preamble index have a correspondence, e.g. for preamble x, a ═ y.

Then the calculation formula at this time is:

RA-RNTI＝1+s_id+14×t_id+14×y×B+14×y×B×ul_carrier_id。

one example is that there is a correspondence between B and preamble index, e.g. for preamble x, B ═ y. The calculation formula at this time is RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × a × y × ul _ carrier _ id.

Other situations are similar and are not described in detail.

Seventh embodiment of the present invention:

in 2step RACH, the network side device receives N identical preambles, e.g. preamble x, from the RO of the FDM at the same time.

For preamble x (or for N msg a containing the preamble x), the network side device replies M RARs.

It is assumed that there is a correspondence between a parameter in RA-RNTI calculation and a data portion of msgA, and more specifically, the terminal directly indicates the parameter through the data portion, or there is a mapping relationship between the parameter and at least part of parameters carried by the data portion, or there is a mapping relationship between the parameter and a reference signal of the data portion.

Because msgA of different terminals may contain the same preamble but different data, and different terminals may use the same RACH resource to transmit the preamble part of msg a for 2step, the network side device may receive different data in the data transmission part corresponding to these msg a. Thus, with these data, the network-side device may be able to determine different parameter values.

In one example, assuming that a is 80 and B is 8, the RA-RNTI used to scramble the RAR PDCCH is as follows: RA-RNTI — 1+ s _ id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id.

The data parts of the f _ id and the msgA of the Msg A have a corresponding relation, the network side equipment detects K different f _ ids from the data parts of the msgA, and the network side equipment brings the values into the formula to calculate K RA-RNTIs.

Further, optionally, the network side device sends PDCCH of K RARs scrambled by the RA-RNTIs respectively. Optionally, for each RA-RNTI, the network side device sends PDCCH of M1 RARs scrambled by the RA-RNTI, i.e. PDCCH of M1 × K RARs. Alternatively, M1 ═ 1.

In another example, assuming f _ id ═ B, the RA-RNTI used to scramble the RAR PDCCH is as follows:

RA-RNTI＝1+s_id+14×t_id+14×A×B+14×A×B×ul_carrier_id。

the data parts of A and msgA have a corresponding relation, the network side equipment detects K different A from the data parts of msgA, and the network side equipment brings the values into the formula to calculate K RA-RNTI.

Further, optionally, the network side device sends PDCCH of K RARs scrambled by the RA-RNTIs respectively. Optionally, for each RA-RNTI, the network side device sends PDCCH of M2 RARs scrambled by the RA-RNTI, i.e. PDCCH of M2 × K RARs. Alternatively, M2 ═ 1.

Eighth embodiment of the present invention:

And for preamble x, the network side equipment replies M RARs, and M is greater than 1.

As an example, if there is a corresponding MAC RAR for a MAC subppdu of preamble sequence x, and each MAC RAR carries a TC-RNTI, these TC-RNTIs are the same.

As an example, for a MAC sub pdu of preamble sequence x, if there is a corresponding MAC RAR, and each MAC RAR carries a TA, these TAs are the same.

As an example, for a MAC sub pdu of preamble sequence x, if there is a corresponding MAC RAR, and each MAC RAR carries a UL Grant, these UL grants are the same.

As an example, for a MAC subPDU of preamble sequence x, if there is a corresponding MAC RAR, these MAC RARs are the same.

Ninth embodiment of the present invention:

the terminal simultaneously sends msg1 on S ROs on a PRACH time domain resource, and sequences corresponding to ms1 on different ROs are the same;

in the time window of receiving RAR corresponding to the sent Preamble, the terminal considers that the RAR is successfully received when S RO corresponds to one RAR or when the S RO corresponds to at least one RAR and RA-RNTI corresponding to the RAR is the same, and the terminal receives ID corresponding to the sent Preamble carried in one RAR in the window, otherwise, the terminal considers that the RAR is failed to receive any RAR after the window is over or when any RAR in the RAR received in the window does not carry ID corresponding to the sent Preamble;

in this case, one possible RA-RNTI calculation method is RA-RNTI ═ 1+ s _ id +14 × t _ id, which is only taken as an example, and in other embodiments, it is not excluded that the RA-RNTI calculation results of different ROs in the same PRACH time domain are the same.

Another embodiment is that when the S ROs correspond to M RARs and RA-RNTIs corresponding to the M RARs are different, M > 1; the terminal considers that the RARs are successfully received when receiving M IDs carrying IDs corresponding to the sent preambles in the window, otherwise, the terminal considers that the RAR reception fails when not receiving any RAR after the window is out or when the number of RARs carrying IDs corresponding to the sent preambles in the window is less than M;

one possible RA-RNTI calculation method in this case is RA-RNTI ═ 1+ s _ id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id, which is only taken as an example, and in other embodiments, reference to an equation that can make RA-RNTI calculation results of different ROs in the same PRACH time domain are different is not excluded.

Referring to fig. 6, an embodiment of the present invention further provides a network-side device 60, including:

a feedback module 61, configured to feed back M random access responses RAR for a first preamble detected on an RO on a PRACH time domain resource, where M is a positive integer and is greater than or equal to 1.

Optionally, the feedback module 61 is configured to feed back M RARs for the N first preambles detected on the RO on the PRACH time domain resource, where N is a positive integer, and M is greater than or equal to 1 and less than or equal to N.

Optionally, the N first preambles are detected from the same RO or different ROs on the PRACH time domain resource.

Alternatively, if N is 1, M is 1.

Alternatively, if N >1, then 1 ≦ M ≦ N.

Optionally, the feedback module 61 is configured to, if N first preambles are detected on the RO on the PRACH time domain resource, consider that the N first preambles are from the same terminal, and feed back M RARs.

Optionally, the value of M is configured by the network side device, predefined by a protocol, or indicated by a terminal.

Optionally, the RO is at least one of:

the RO with the highest frequency domain on the PRACH time domain resource;

the lowest RO of the frequency domain on the PRACH time domain resource;

the RO is specified.

Optionally, the feedback module 61 is configured to determine RA-RNTIs used for scrambling the PDCCHs of the M RARs, and if M >1, the RA-RNTIs used for scrambling the PDCCHs of the M RARs are the same or different.

Optionally, the feedback module 61 is configured to determine, according to the time domain information of the RO of the first preamble detected and the corresponding relationship between the time domain information of the RO and the RA-RNTI, the RA-RNTI of the PDCCH for scrambling the M RARs.

Optionally, the corresponding relationship between the time domain information of the RO and the RA-RNTI is configured by the network side device, predefined by a protocol, or indicated by a terminal.

Optionally, the feedback module 61 is configured to calculate an RA-RNTI for a PDCCH scrambling the RAR by using the following formula:

RA-RNTI＝1×C1+s_id×C2+symbol×t_id×C3+symbol×A×f_id×C4+symbol×A×B×ul_carrier_id×C5+C6

wherein,

s _ id is the number of the OFDM symbol where the first symbol of the PRACH time domain resource is located;

ul _ carrier _ id is configured by the network side equipment, or ul _ carrier _ id is a preset value, or ul _ carrier _ id is indicated by the terminal, or ul _ carrier _ id is a channel number of an RO used by the terminal for sending the first preamble;

wherein C1, C2, C3, C4, C5, C6 are integers.

The formula comprises a first parameter, wherein the first parameter comprises at least one of f _ id, A, B and ul _ carrier _ id.

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

d1, D2, D3, D4 and D5 are integers;

included in the formula is a first parameter that includes at least one of A, B and ul _ carrier _ id.

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

E1, E2, E3 and E4 are integers.

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers.

The formula comprises a first parameter, and the first parameter comprises at least one of f _ id and A.

Optionally, the first parameter is configured by the network side device, and the network side device further includes:

a first sending module, configured to send first configuration information, where the first configuration information is used to indicate a value of the first parameter;

Optionally, the first parameter is indicated by a terminal, and the network side device further includes:

a first determining module, configured to determine a value of the first parameter according to a corresponding relationship between the first parameter and the first preamble.

a second determining module, configured to determine a value of the first parameter according to the data portion in the first message if the first preamble is carried in the first message, where the first message includes the first preamble and the data portion.

Optionally, at least one item of information carried by the M RARs is the same, where the information is at least one of:

timing advance information;

a terminal identification;

and (4) uplink scheduling permission.

Optionally, the information carried by the M RARs is the same.

Optionally, the network side device further includes:

a second sending module, configured to send second configuration information, where the second configuration information is used to instruct the terminal to send S preambles on an RO on one PRACH time domain resource, and S is a positive integer and is greater than 1.

Optionally, the second configuration information is used to instruct the terminal to send S identical preambles on an RO on one PRACH time domain resource.

Referring to fig. 7, an embodiment of the present invention further provides a terminal 70, including:

a sending module 71, configured to send S preambles on an RO on one PRACH time domain resource;

a monitoring module 72, configured to monitor at least one RAR of M RARs fed back by the network side device for a first preamble in the S preambles;

Optionally, the S preambles are the same and are all first preambles.

Optionally, the monitoring module 72 is configured to, if T RARs fed back by a first preamble in the S preambles are monitored in a RAR receiving window, end the monitoring, where T is 1, or T is S, or T is M, or T is another defined value; otherwise, the random access is considered to fail.

Optionally, the terminal further includes:

and the selection module is used for selecting one of the information carried by the T RARs if T is greater than 1 and at least one of the information carried by the T RARs is different.

Optionally, the information is at least one of:

timing advance information;

a terminal identification;

and (4) uplink scheduling permission.

Optionally, the terminal further includes:

and the determining module is used for determining the RA-RNTI for descrambling the PDCCH of the at least one RAR according to the time domain information of the RO for sending the first preamble and the corresponding relation between the time domain information of the RO and the RA-RNTI.

Optionally, the correspondence between the time domain information of the RO and the RA-RNTI is configured by a network side device, predefined by a protocol, or indicated by the terminal.

Optionally, the terminal further includes:

a first calculation module configured to calculate an RA-RNTI for descrambling the PDCCH of the at least one RAR using the following formula:

wherein,

ul _ carrier _ id is configured by the network side equipment, or ul _ carrier _ id is a preset value, or ul _ carrier _ id is indicated by the terminal, or ul _ carrier _ id is a channel number of an RO used by the terminal to send the first preamble;

wherein C1, C2, C3, C4, C5, C6 are integers.

Optionally, the terminal further includes:

a second calculation module, configured to calculate an RA-RNTI for descrambling the PDCCH of the at least one RAR using the following formula:

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

Optionally, the terminal further includes:

a third calculation module for calculating an RA-RNTI for descrambling the PDCCH of the at least one RAR using the following formula:

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

t _ id is the slot number of the first slot of the PRAC H time domain resource in a second given time, where the second given time is at least one slot, at least one millisecond, at least one subframe, the time domain length of at least one RO, at least one frame, or at least one time window.

E1, E2, E3 and E4 are integers.

Optionally, the terminal further includes:

a fourth calculating module, configured to calculate an RA-RNTI for descrambling the PDCCH of the at least one RAR using the following formula:

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers;

the formula comprises a first parameter, and the first parameter comprises at least one of f _ id and A. 34. The method of any one of claims 30, 31, 33, wherein the first parameter is configured by the network-side device, the method further comprising:

Optionally, a first parameter in the formula is indicated by the terminal, and the first parameter has a corresponding relationship with the preamble.

Optionally, a first parameter in the formula is indicated by the terminal, the preamble is carried in a first message, the first message includes the first preamble and a data portion, and the data portion in the first message is used to indicate a value of the first parameter.

Optionally, the terminal further includes:

a receiving module, configured to receive second configuration information, where the second configuration information is used to instruct a terminal to send S preambles on an RO on one PRACH time domain resource.

Optionally, the sending module 71 is further configured to, if the PRACH time domain resource that is preempted by the terminal and used for random access is in an unlicensed frequency band, default to send S preambles on the RO on the PRACH time domain resource.

Optionally, the sending module 71 is further configured to, if the PRACH time domain resource that is preempted by the terminal and used for random access is in an unlicensed frequency band, default to send S identical preambles on the RO on the PRACH time domain resource.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a terminal according to another embodiment of the present invention, where the terminal 80 includes but is not limited to: radio frequency unit 81, network module 82, audio output unit 83, input unit 84, sensor 85, display unit 86, user input unit 87, interface unit 88, memory 89, processor 810, and power supply 811. Those skilled in the art will appreciate that the terminal configuration shown in fig. 8 is not intended to be limiting, and that the terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

Wherein, the processor 810 is configured to send S preambles on an RO on one PRACH time domain resource; monitoring at least one RAR in M RARs fed back by the network side equipment aiming at a first preamble in the S preambles; wherein S and M are positive integers, S is greater than 1, and M is greater than or equal to 1.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 81 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 810; in addition, the uplink data is transmitted to the base station. In general, the radio frequency unit 81 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 81 can also communicate with a network and other devices through a wireless communication system.

The terminal provides wireless broadband internet access to the user via the network module 82, such as to assist the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 83 may convert audio data received by the radio frequency unit 81 or the network module 82 or stored in the memory 89 into an audio signal and output as sound. Also, the audio output unit 83 may also provide audio output related to a specific function performed by the terminal 80 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 83 includes a speaker, a buzzer, a receiver, and the like.

The input unit 84 is used to receive audio or video signals. The input Unit 84 may include a Graphics Processing Unit (GPU) 841 and a microphone 842, the Graphics processor 841 Processing image data of still pictures or videos obtained by an image capturing apparatus (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 86. The image frames processed by the graphic processor 841 may be stored in the memory 89 (or other storage medium) or transmitted via the radio frequency unit 81 or the network module 82. The microphone 842 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 81 in case of the phone call mode.

The terminal 80 also includes at least one sensor 85, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 861 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 861 and/or the backlight when the terminal 80 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the terminal posture (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 85 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which are not described in detail herein.

The display unit 86 is used to display information input by the user or information provided to the user. The Display unit 86 may include a Display panel 861, and the Display panel 861 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 87 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal. Specifically, the user input unit 87 includes a touch panel 871 and other input devices 872. The touch panel 871, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 871 (e.g., operations by a user on or near the touch panel 871 using a finger, a stylus, or any suitable object or accessory). The touch panel 871 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 810, receives a command from the processor 810, and executes the command. In addition, the touch panel 871 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 87 may include other input devices 872 in addition to the touch panel 871. Specifically, the other input devices 872 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

Further, the touch panel 871 can be overlaid on the display panel 861, and when the touch panel 871 detects a touch operation on or near the touch panel 871, the touch panel 871 is transmitted to the processor 810 to determine the type of the touch event, and then the processor 810 provides a corresponding visual output on the display panel 861 according to the type of the touch event. Although the touch panel 871 and the display panel 861 are shown in fig. 8 as two separate components to implement the input and output functions of the terminal, in some embodiments, the touch panel 871 and the display panel 861 may be integrated to implement the input and output functions of the terminal, which is not limited herein.

The interface unit 88 is an interface for connecting an external device to the terminal 80. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 88 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the terminal 80 or may be used to transmit data between the terminal 80 and an external device.

The memory 89 may be used to store software programs as well as various data. The memory 89 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 89 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 810 is a control center of the terminal, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 89 and calling data stored in the memory 89, thereby integrally monitoring the terminal. Processor 810 may include one or more processing units; preferably, the processor 810 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 810.

The terminal 80 may also include a power supply 811 (e.g., a battery) for powering the various components, and preferably, the power supply 811 may be logically coupled to the processor 810 via a power management system to manage charging, discharging, and power consumption management functions via the power management system.

In addition, the terminal 80 includes some functional modules that are not shown, and are not described in detail herein.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a network-side device according to another embodiment of the present invention, where the network-side device 90 includes: a processor 91 and a memory 92. In this embodiment of the present invention, the network-side device 90 further includes: a computer program stored on the memory 92 and executable on the processor 91, the computer program when executed by the processor 91 performing the steps of: m random access responses RAR are fed back aiming at a first preamble detected on a PRACH transmission opportunity RO on a PRACH time domain resource of a physical random access channel, wherein M is a positive integer and is more than or equal to 1.

The processor 91 is responsible for managing the bus architecture and general processing, and the memory 92 may store data used by the processor 91 in performing operations.

Optionally, the computer program when executed by the processor 91 may further implement the steps of: the feeding back M RARs for the first preamble detected on the RO on one PRACH time domain resource includes:

and feeding back M RARs aiming at N first preambles detected on the RO on the PRACH time domain resource, wherein N is a positive integer, and M is more than or equal to 1 and less than or equal to N.

Alternatively, if N is 1, M is 1.

Alternatively, if N >1, then 1 ≦ M ≦ N.

Optionally, the computer program when executed by the processor 91 may further implement the steps of: the feeding back M RARs for the N first preambles detected on the RO on the PRACH time domain resource comprises:

and if N first preambles are detected on the RO on the PRACH time domain resource, the N first preambles are considered to be from the same terminal, and M RARs are fed back.

Optionally, the RO is at least one of:

the RO with the highest frequency domain on the PRACH time domain resource;

the lowest RO of the frequency domain on the PRACH time domain resource;

the RO is specified.

Optionally, the computer program when executed by the processor 91 may further implement the steps of: the feedback M RARs include: and determining a random access radio network temporary identifier (RA-RNTI) used for scrambling the Physical Downlink Control Channel (PDCCH) of the M RARs, wherein if M is greater than 1, the RA-RNTIs used for scrambling the PDCCH of the M RARs are the same or different.

Optionally, the computer program when executed by the processor 91 may further implement the steps of: RA-RNTI of PDCCH used for scrambling the RARs is independent of frequency domain of RO, and the feedback M RARs include:

and determining RA-RNTIs of PDCCHs used for scrambling the M RARs according to the detected time domain information of the RO of the first preamble and the corresponding relation between the time domain information of the RO and the RA-RNTIs.

Optionally, the computer program when executed by the processor 91 may further implement the steps of:

the feedback M RARs include:

calculating RA-RNTI of PDCCH used for scrambling the RAR by adopting the following formula:

wherein,

wherein C1, C2, C3, C4, C5, C6 are integers.

the feedback M RARs include:

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

the feedback M RARs include:

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

E1, E2, E3 and E4 are integers.

the feedback M RARs include:

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers.

Optionally, the computer program when executed by the processor 91 may further implement the steps of: the first parameter is configured by the network side device, and the method further comprises:

Optionally, the computer program when executed by the processor 91 may further implement the steps of: the first parameter is indicated by the terminal, and before feeding back the M RARs, the method further includes:

Optionally, the computer program when executed by the processor 91 may further implement the steps of: the first parameter is indicated by the terminal, if the first preamble is carried in a first message, where the first message includes the first preamble and a data portion, and before feeding back the M RARs, the method further includes:

timing advance information;

a terminal identification;

and (4) uplink scheduling permission.

Optionally, the information carried by the M RARs is the same.

Optionally, the computer program when executed by the processor 91 may further implement the steps of: before the feedback of the M RARs, the method further comprises:

Referring to fig. 10, fig. 10 is a schematic structural diagram of a terminal according to another embodiment of the present invention, where the terminal 100 includes: a processor 101 and a memory 102. In this embodiment of the present invention, the terminal 100 further includes: a computer program stored on the memory 102 and executable on the processor 101, the computer program when executed by the processor 101 implementing the steps of: sending S preambles on the RO on one PRACH time domain resource;

The processor 101 is responsible for managing the bus architecture and general processing, and the memory 102 may store data used by the processor 101 in performing operations.

Optionally, the S preambles are the same and are all first preambles.

Optionally, the computer program when executed by the processor 101 may further implement the steps of:

the monitoring network side device includes, for at least one RAR of the M RARs fed back by the first preamble of the S preambles:

otherwise, the random access is considered to fail.

if after T RARs fed back for a first preamble in the S preambles are monitored within the RAR reception window, the method further includes:

Optionally, the information is at least one of:

timing advance information;

a terminal identification;

and (4) uplink scheduling permission.

calculating an RA-RNTI for descrambling the PDCCH of the at least one RAR using the following formula:

wherein,

wherein C1, C2, C3, C4, C5, C6 are integers.

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

E1, E2, E3 and E4 are integers.

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers;

before the sending S preambles on the RO on one PRACH time domain resource, the method further includes:

the sending S preambles on the RO on one PRACH time domain resource includes:

the default sending S preambles on the RO on the PRACH time domain resource comprises:

s identical preambles are sent on the RO on the PRACH time domain resource by default.

The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above random access method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A random access method is applied to network side equipment, and is characterized by comprising the following steps:

feeding back M Random Access Responses (RAR) aiming at a first preamble detected on a PRACH transmission opportunity (RO) on a PRACH time domain resource of a physical random access channel, wherein M is a positive integer and is more than or equal to 1;

the feedback M RARs include:

wherein,

c1, C2, C3, C4, C5 and C6 are integers;

the formula comprises a first parameter, wherein the first parameter comprises at least one of f _ id, A, B and ul _ carrier _ id; or

The feedback M RARs include:

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

the formula comprises a first parameter, wherein the first parameter comprises at least one of A, B and ul _ carrier _ id; or

The feedback M RARs include:

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

e1, E2, E3 and E4 are integers; or

The feedback M RARs include:

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers;

2. The method of claim 1, wherein the feeding back M RARs for a first preamble detected on an RO on one PRACH time domain resource comprises:

3. The method of claim 2,

the N first preambles are detected from the same RO or different ROs on the PRACH time domain resource.

4. The method of claim 2,

if N is 1, M is 1.

5. The method of claim 2,

if N is greater than 1, M is greater than or equal to 1 and less than or equal to N.

6. The method of claim 5, wherein the feeding back M RARs for N of the first preambles detected on an RO on the PRACH time domain resource comprises:

7. The method of claim 1,

the value of M is configured by the network side equipment, predefined by a protocol or indicated by a terminal.

8. The method of claim 1, wherein the RO is at least one of:

the RO with the highest frequency domain on the PRACH time domain resource;

the lowest RO of the frequency domain on the PRACH time domain resource;

the RO is specified.

9. The method of claim 1, wherein the feeding back the M RARs comprises:

and determining a random access radio network temporary identifier (RA-RNTI) used for scrambling the Physical Downlink Control Channel (PDCCH) of the M RARs, wherein if M is greater than 1, the RA-RNTIs used for scrambling the PDCCH of the M RARs are the same or different.

10. The method of claim 1, wherein the RA-RNTI of the PDCCH used to scramble the RAR is independent of the frequency domain of the RO, and the feeding back the M RARs comprises:

11. The method of claim 10, wherein the correspondence of the time domain information of the RO to the RA-RNTI is configured by the network-side device, predefined by a protocol, or indicated by a terminal.

12. The method of claim 1, wherein the first parameter is configured by the network-side device, the method further comprising:

wherein the first configuration information is at least one of: a physical broadcast channel PBCH, a primary synchronization signal PSS, a secondary synchronization signal SSS, a system information block-SIB 1, a reference signal RS, a discovery reference signal DRS, other SIBs than the SIB1, and a radio resource control RRC.

13. The method according to claim 1, wherein the first parameter is indicated by a terminal, and wherein feeding back the M RARs is preceded by:

14. The method according to claim 1, wherein the first parameter is indicated by a terminal, and if the first preamble is carried in a first message, the first message includes the first preamble and a data part, and before feeding back the M RARs, the method further includes:

15. The method according to claim 1 or 2, wherein at least one of the information carried by the M RARs is the same, the information being at least one of:

timing advance information;

a terminal identification;

and (4) uplink scheduling permission.

16. The method of claim 15,

the information carried by the M RARs is the same.

17. The method of claim 1, wherein feeding back the M RARs is preceded by:

18. The method of claim 17,

the second configuration information is used to instruct the terminal to send S identical preambles on the RO on one PRACH time domain resource.

19. A random access method applied to a terminal is characterized by comprising the following steps:

sending S preambles on the RO on one PRACH time domain resource;

wherein S and M are positive integers, S is greater than 1, and M is greater than or equal to 1;

wherein,

t _ id is a time slot number where a first time slot of the PRACH time domain resource is located within a first given time, where the first given time is at least one time slot, at least one millisecond, at least one subframe, a time domain length of at least one RO, at least one frame, or at least one time window;

c1, C2, C3, C4, C5 and C6 are integers;

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

e1, E2, E3 and E4 are integers; or

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f _ id is configured by the network side equipment, or f _ id is a preset value, or f _ id is indicated by a terminal, or f _ id is configured by the network side equipment;

f1, F2, F3, F4 and F5 are integers;

20. The method of claim 19, wherein the S preambles are identical and are all first preambles.

21. The method according to claim 19, wherein the monitoring of at least one RAR of the M RARs fed back by the network-side device for a first preamble of the S preambles comprises:

otherwise, the random access is considered to fail.

22. The method of claim 21, wherein if T RARs fed back for a first preamble of the S preambles are monitored within a RAR reception window, further comprising:

23. The method of claim 22, wherein the information is at least one of:

timing advance information;

a terminal identification;

and (4) uplink scheduling permission.

24. The method of claim 19, further comprising:

25. The method of claim 24, wherein the correspondence of the time domain information of the RO to the RA-RNTI is configured by a network-side device, predefined by a protocol, or indicated by the terminal.

26. The method as recited in claim 19, wherein said first parameter is configured by said network side device, said method further comprising:

27. The method of claim 19, wherein a first parameter in the formula is indicated by the terminal, the first parameter having a correspondence with the preamble.

28. A method as claimed in claim 19, wherein a first parameter in the formula is indicated by the terminal, the preamble is carried in a first message, the first message comprises the first preamble and a data portion, the data portion is used to determine the value of the first parameter.

29. The method of claim 19, wherein prior to the sending of the S preambles on the RO on one PRACH time domain resource, further comprising:

30. The method of claim 29,

31. The method of claim 19, wherein the sending S preambles on ROs on one PRACH time domain resource comprises:

32. The method of claim 31, wherein the default sending S preambles on ROs on the PRACH time domain resource comprises:

33. A network-side device, comprising:

the system comprises a feedback module and a detection module, wherein the feedback module is used for feeding back M RARs (random access request) aiming at a first preamble detected on an RO (reverse osmosis) on a PRACH (physical random access channel) time domain resource, wherein M is a positive integer and is more than or equal to 1;

the feedback M RARs include:

wherein,

c1, C2, C3, C4, C5 and C6 are integers;

The feedback M RARs include:

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

The feedback M RARs include:

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

e1, E2, E3 and E4 are integers; or

The feedback M RARs include:

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers;

34. A terminal, comprising:

wherein,

c1, C2, C3, C4, C5 and C6 are integers;

RA-RNTI＝1×D1+s_id×D2+symbol×t_id×D3+symbol×A×B×ul_carrier_id×D4+D5

wherein,

d1, D2, D3, D4 and D5 are integers;

RA-RNTI＝1×E1+s_id×E2+symbol×t_id×E3+E4

wherein,

e1, E2, E3 and E4 are integers; or

RA-RNTI＝1×F1+s_id×F2+symbol×t_id×F3+symbol×A×f_id×F4+F5

f1, F2, F3, F4 and F5 are integers;

35. A network side device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the random access method according to any one of claims 1 to 18.

36. A terminal, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, realizes the steps of the random access method according to any of claims 19-32.

37. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the random access method according to any one of claims 1 to 32.