CN115119329A

CN115119329A - Random access method, device, terminal and network side equipment

Info

Publication number: CN115119329A
Application number: CN202110309963.XA
Authority: CN
Inventors: 杨坤; 吴凯; 李娜
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2022-09-27

Abstract

The application discloses a random access method, a device, a terminal and network side equipment, belonging to the technical field of communication, wherein the random access method of the embodiment of the application comprises the following steps: the terminal receives scheduling information of a network side, wherein the scheduling information is used for scheduling the transmission of the Msg 3; the terminal transmits Msg3 carrying additional information based on the scheduling information; wherein the additional information is used to indicate at least one of: the terminal supports Msg3 repeated transmission or the terminal does not support Msg3 repeated transmission; msg3 is Msg3 for a repeat transmission or Msg3 is Msg3 for a single transmission; number of repeated transmissions of Msg3 transmissions.

Description

Random access method, device, terminal and network side equipment

Technical Field

The application belongs to the technical field of communication, and particularly relates to a random access method, a random access device, a terminal and network side equipment.

Background

When a normal terminal and a terminal supporting information 3(message3, Msg3) repeat transmission coexist in a cell, a network side device can schedule the behavior of Msg3 repeat transmission for a terminal with poor coverage, but the base station does not know the type of the scheduled terminal when scheduling Msg3 repeat transmission.

In the prior art, a network side device needs to perform multiple blind checks in multiple scheduled time slots to determine the type of a terminal. This results in an increase in the detection complexity of the network side device, and due to blind detection of multiple timeslots, the delay of the base station sending Msg4 or Msg3 to retransmit the scheduling Downlink Control Information (DCI) is increased, which results in an excessively long delay of the Random Access Channel (RACH) procedure.

Disclosure of Invention

The embodiment of the application provides a random access method, a random access device, a terminal and a network side device, and can solve the problems that the detection complexity of the network side device is increased and the random access time delay is too long.

In a first aspect, a random access method is provided, where the method includes:

the terminal receives scheduling information of a network side, wherein the scheduling information is used for scheduling the transmission of the Msg 3;

the terminal transmits Msg3 carrying additional information based on the scheduling information;

wherein the additional information is used to indicate at least one of:

the terminal supports Msg3 repeated transmission or the terminal does not support Msg3 repeated transmission;

the Msg3 is a repeatedly transmitted Msg3 or the Msg3 is a single transmitted Msg 3;

the number of repeated transmissions of the Msg3 transmission.

In a second aspect, a random access method is provided, and the method includes:

the network side equipment sends scheduling information, wherein the scheduling information is used for scheduling the Msg 3;

the network side equipment receives the Msg3 transmitted by the terminal based on the scheduling information, and the Msg3 carries additional information;

the network side equipment completes random access based on the Msg3 carrying the additional information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

In a third aspect, a random access apparatus is provided, the apparatus comprising:

the system comprises a first receiving module, a second receiving module and a scheduling module, wherein the first receiving module is used for receiving scheduling information of a network side, and the scheduling information is used for scheduling the transmission of Msg 3;

a first transmission module, configured to transmit Msg3 carrying additional information based on the scheduling information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

In a fourth aspect, a random access apparatus is provided, the apparatus comprising:

the system comprises a first sending module, a second sending module and a scheduling module, wherein the first sending module is used for sending scheduling information, and the scheduling information is used for scheduling Msg 3;

a second receiving module, configured to receive the Msg3 transmitted by the terminal based on the scheduling information, where the Msg3 carries additional information;

the random access module is used for completing random access by the network side equipment based on the Msg3 carrying the additional information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

In a fifth aspect, a terminal is provided, the terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the first aspect.

In a sixth aspect, a terminal is provided, which includes a processor and a communication interface, where the communication interface is configured to:

receiving scheduling information of a network side, wherein the scheduling information is used for scheduling the transmission of the Msg 3;

the processor is configured to:

transmitting Msg3 carrying additional information based on the scheduling information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

In a seventh aspect, a network-side device is provided, which includes a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, and when executed by the processor, the program or the instruction implements the steps of the method according to the second aspect.

In an eighth aspect, a network-side device is provided, which includes a processor and a communication interface, where the communication interface is configured to:

sending scheduling information, wherein the scheduling information is used for scheduling the Msg 3;

the receiving terminal transmits the Msg3 based on the scheduling information, wherein the Msg3 carries additional information;

the processor is configured to:

based on the Msg3 carrying the additional information, random access is completed;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

In a ninth aspect, there is provided a readable storage medium on which is stored a program or instructions which, when executed by a processor, carries out the steps of the method of the first aspect or the steps of the method of the second aspect.

In a tenth aspect, a chip is provided, the chip comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being configured to execute a program or instructions to implement the steps of the method according to the first aspect or to implement the steps of the method according to the second aspect.

In an eleventh aspect, there is provided a computer program/program product stored on a non-volatile storage medium, the program/program product being executable by at least one processor to perform the steps of the method according to the first aspect or to perform the steps of the method according to the second aspect.

In the embodiment of the application, when the Msg3 is transmitted to the network side equipment through the terminal, additional information is carried to indicate whether the terminal supports Msg3 repeated transmission or not and whether the Msg3 is the Msg3 of repeated transmission or not; and the number of repeated transmissions of the current Msg3 transmission enables the network side equipment to directly obtain the type of the terminal, and then the Msg3 detection is performed based on the type of the terminal, so that the number of blind detection of the network side equipment can be greatly reduced, and the time delay of a random access process is greatly shortened.

Drawings

FIG. 1 illustrates a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a schematic diagram of a random access procedure provided in an embodiment of the present application;

fig. 3 is a flowchart of a random access method provided in an embodiment of the present application;

fig. 4 is a second flowchart of a random access method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 6 is a second schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

fig. 8 is a schematic hardware structure diagram of a terminal implementing the embodiment of the present application;

fig. 9 is a schematic diagram of a hardware structure of a network device for implementing an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of protection of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-a) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. This application is trueThe terms "system" and "network" in the embodiments are often used interchangeably, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, but the techniques may also be applied to applications other than NR system applications, such as 6 th generation (6 th generation) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: smart watches, bracelets, earphones, glasses, and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The random access method and apparatus provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through some embodiments and application scenarios thereof.

The following is first introduced:

fig. 2 is a schematic diagram of a random access procedure provided in an embodiment of the present application, and as shown in fig. 2, the random access procedure may include a 4-step random access procedure (4-step RACH) and a 2-step random access procedure (2-step RACH). Both types of ra (random access) procedures support Contention-based random access (CBRA) and Contention-free random access (CFRA). Wherein, the 2-step RACH flow is generally applied to the area with better coverage, and the access time of the terminal is shortened. For areas with poor signal coverage, the terminal may access the cell using a 4-step RACH procedure.

Wherein, the 4-step random access (4-step RACH) process comprises:

in 4-step RACH, UE firstly sends Msg1 to the network, wherein the Msg1 comprises preamble; after the UE transmits the preamble, it monitors the PDCCH in an RAR time window (RA Response window) and receives a Random Access Response (RAR) scheduled by the PDCCH scrambled with the RA-RNTI in a fallback (fallback) DCI format, i.e., DCI format 1_ 0. If the preamble index in the RAR is the same as the preamble index sent by the UE, the RAR is considered to be successfully received, and at the moment, the UE can stop monitoring the RAR and send Msg3 according to the indication of the grant carried in the RAR; msg3 is transmitted on the UL-SCH and uses HARQ, scrambles PDCCH with TC-RNTI indicated by RAR, and schedules retransmission of msg.3 with fallback (fallback) DCI format, i.e. DCI format 1_ 0. The Msg3 needs to contain an important message: a unique flag per UE. This flag will be used for conflict resolution in step four. After receiving the Msg3, the network schedules the PDCCH scrambled by the TC-RNTI to Msg.4, and when the UE successfully decodes the UE context Resolution MAC control element contained in the Msg.4 and the UE context Resolution decision sent by the Msg3 are matched, the UE considers that the random access is successful and sets a Cell-radio network temporary identifier (C-RNTI) of the UE to be a temporary scheduling identifier number (TC-RNTI), namely 4-step random access is completed.

The method for transmitting the Demodulation Reference Signal (DMRS) of the Msg3 Uplink Shared channel (pusch) includes:

there are two kinds of transmission waveforms for the uplink signal, CP-ofdm (transform coding disabled) and DFT-S-ofdm (transform coding enabled). The upstream transmit waveform is indicated by a system message. The DMRS generation sequences of the Msg3 PUSCH are also different for different uplink transmission waveforms.

PUSCH DMRS sequence of CP-OFDM waveform: using the m-sequence as a pilot sequence, the generating function is

c(n)＝(x ₁ (n+N _C )+x ₂ (n+N _C ))mod2

x ₁ (n+31)＝(x ₁ (n+3)+x ₁ (n))mod2

x ₂ (n+31)＝(x ₂ (n+3)+x ₂ (n+2)+x ₂ (n+1)+x ₂ (n))mod2；

Wherein N is _C 1600, sequence x ₁ (n) has a fixed initialization state x ₁ (0)＝1,x ₁ (n) 0,

n

1,2, 30, sequence x ₂ (n) initialization status by parameter

It is determined that,

for the case of Msg3, the term Msg3,

n _SCID ＝0。

PUSCH DMRS sequence of FDT-s-OFDM waveform: using ZC sequence or constant modulus pseudo-random sequence as pilot sequence and generating function of

When the sequence length is greater than or equal to 36:

when the sequence length is equal to 6, 12, 18, 24:

when the sequence length is equal to 30:

for Msg3 transmissions, α -0, δ -1;

sequence group identification

Wherein

Parameter f of sequence group hopping (group hopping) _gh Indicated by higher layer signaling. Sequence hopping (i.e., v is 0) is not allowed in Msg 3.

v＝0；

In addition, demodulation reference signal (DMRS) resource mapping schemes for different transmission waveforms are also different.

Wherein, DMRS resource mapping of Cyclic Prefix Orthogonal Frequency-Division Multiplexing (CP-OFDM) waveform:

the

configuration type

1 or 2 is indicated by the higher layer signaling DMRS-UplinkConfig.

DMRS resource mapping method for Discrete Fourier Transform-Spread Spectrum-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform:

parameter w in the formula _f (k)，w _t (l'), Δ all correspond to antenna logical ports, Msg3 defaults to using port 0 for resource mapping.

In addition, regarding multiplexing of Uplink Control Information (UCI) and PUSCH:

when transmitting PUSCH, a terminal may use a partial Orthogonal Frequency Division Multiplexing (OFDM) symbol in scheduling time-Frequency resources to carry UCI information. The UCI Information may be Hybrid Automatic Repeat reQuest (HARQ), Channel State Information (CSI), or the like. The OFDM symbols of the PUSCH multiplexed UCI are mapped on OFDM symbols immediately after the DMRS signal.

In the Msg3 transmission of the four-step random access flow, multiplexing transmission of UCI is not supported.

Fig. 3 is a flowchart of a random access method provided in an embodiment of the present application, and as shown in fig. 3, the method includes the following steps:

step 300, receiving scheduling information of a network side, wherein the scheduling information is used for scheduling the transmission of Msg 3;

step 310, the terminal transmits Msg3 carrying additional information based on the scheduling information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

Alternatively, the coverage performance of Msg3 is poor compared to that of other channels, resulting in difficult access to the cell for terminals in areas with poor signal coverage quality. Therefore, a mechanism of repeatedly sending Msg3 can be introduced to improve the coverage performance of Msg 3. To distinguish between single-send Msg3 and repeat-send Msg3, the terminal may carry additional information when sending Msg3 to assist the network-side device in determining the number of Msg3 receptions or determining the Msg3 repeat transmission capability of the terminal, i.e., whether the terminal supports repeat transmission Msg3 or whether the currently transmitted Msg3 is based on repeat transmission Msg 3.

Alternatively, in order to reduce the complexity of detecting the Msg3 by a network-side device such as a base station, a small amount of additional information may be sent at the same time when the Msg3 is sent to indicate the type of the terminal, so as to assist the base station in detecting the Msg 3.

Optionally, the additional information may be indication information of limited bits, for example, indication information of only 1-2 bits.

Alternatively, a terminal supporting the Msg3 repetition may provide additional information by multiplexing UCI or RNTI of the initial transmission/retransmission Msg3 PUSCH through a dedicated DMRS sequence repeatedly transmitted by Msg3 when transmitting Msg 3.

Optionally, the additional information may be used to indicate whether the terminal supports the Msg3 repeat sending;

optionally, the additional information may be used to indicate whether the terminal performs random access according to a RACH procedure repeatedly transmitted by Msg 3;

alternatively, the additional information may be used to indicate the actual number of transmissions that Msg3 repeatedly transmits.

Alternatively, the network side device may detect additional information of the terminal upon receiving the first slot of the schedule Msg3 (i.e., the Msg3 of the first transmission).

Optionally, the network side device may determine the type of the terminal according to the detection result, that is, determine whether the terminal supports the repeated transmission of Msg3, or whether the currently transmitted Msg3 is a repeated transmission, and determine a subsequent action.

Optionally, the subsequent actions on the network side may include the behavior of whether to continue receiving the Msg3 in the subsequent time slot, the turn-on time of the Msg4 or Msg3 retransmission timer, the sending format of the TC-RNTI scrambled DCI 0_0, and the like, so that the network side device may complete the random access procedure.

In the embodiment of the application, a terminal supporting Msg3 repetition provides additional information through a dedicated DMRS or an RNTI multiplexing UCI or an initial transmission/retransmission Msg3 PUSCH when transmitting Msg 3. The additional information is used for indicating the actual execution situation of whether the terminal performs the Msg3 repeated transmission or whether the terminal performs random access according to the RACH flow of the Msg3 repeated transmission or the Msg3 repeated transmission, so that the network side device can determine the terminal performing the Msg3 repeated transmission or determine whether the terminal performs the flow of the Msg3 repeated transmission through the additional information carried by the Msg 3.

In the embodiment of the application, when the Msg3 is transmitted to the network side device through the terminal, additional information is carried to indicate whether the terminal supports Msg3 repeated transmission and whether the Msg3 is Msg3 repeated transmission to the network side device; and the number of repeated transmissions of the current Msg3, so that the network side equipment can directly obtain the type of the terminal, and further the Msg3 detection is performed based on the type of the terminal, thereby greatly reducing the number of blind detection of the network side equipment and greatly shortening the time delay of a random access process.

Optionally, the terminal transmits Msg3 carrying additional information based on the scheduling information, including:

under the condition that the terminal determines to report the additional information, transmitting Msg3 carrying the additional information based on the scheduling information;

wherein the terminal determines to report the additional information, and the additional information includes at least one of the following:

the terminal determines that the Msg3 is scheduled to be a repeated transmission based on the scheduling information and that the terminal supports Msg3 repeated transmission;

the terminal determines that the Msg3 is scheduled as a single transmission based on the scheduling information, and determines that the network-side device supports Msg3 repeated transmission and the terminal supports Msg3 repeated transmission based on the scheduling information and/or the system information.

Optionally, the terminal may report its own Msg3 retransmission capability when determining that the Msg3 is scheduled to be a retransmission, that is, report the Msg3 with additional information;

therefore, the terminal can determine that the Msg3 is scheduled to be transmitted repeatedly based on the scheduling information, and report additional information to indicate the Msg3 repeat transmission capability of the terminal when the terminal supports Msg3 repeat transmission;

optionally, the terminal and the network side device may both support the Msg3 retransmission, and actively report the Msg3 retransmission capability of the terminal, that is, actively report the Msg3 with additional information;

therefore, the terminal can report additional information to indicate its own Msg3 repeat transmission capability when the network-side device supports Msg3 repeat transmission but does not schedule Msg3 repeat transmission, that is, when the network-side device supports Msg3 repeat transmission and schedules Msg3 individual transmission, and the terminal supports Msg3 repeat transmission;

optionally, the Msg3 repeat transmission capability of the terminal may include information that the terminal supports Msg3 repeat transmission;

taking the additional information carried by the dedicated DMRS sequence as an example:

alternatively, if the network side device instructs the terminal to perform the Msg3 repeat transmission, the terminal performs the Msg3 repeat transmission, and DMRS carrying additional information may be generated using the dedicated DMRS parameters.

Alternatively, if the parsing of the DCI 1_0 and the Msg2 scrambled by the RA-RNTI defined by the protocol is successful and the network side device is indicated by the system information to support the Msg3 repeated transmission, the terminal may perform Msg3 single transmission and generate DMRS carrying additional information using the dedicated DMRS parameters.

Alternatively, if the DCI 1_0 and the Msg2 scrambled by the RA-RNTI defined by the protocol are resolved successfully and the network side device is indicated by the system information to support the Msg3 repeated transmission, the terminal performs the RACH procedure defined by the protocol, that is, performs the Msg3 single transmission and uses the defined DMRS.

Alternatively, if the system information indicates that the network side device does not support the Msg3 repeated transmission, the terminal executes a RACH procedure defined by the protocol.

Optionally, the terminal determining that the Msg3 is scheduled to be transmitted repeatedly based on the scheduling information, comprising:

determining that the Msg3 is scheduled for repeated transmission if the scheduling information is scrambled by the dedicated RNTI of the Msg3 repeated transmission.

Optionally, in the random access procedure, the terminal sends an Msg1 message, and the Msg1 parameters are the same as Msg1 parameters defined in the existing protocol. The network side device detects the Msg1 blindly, and determines whether to configure Msg3 for the terminal for repeated transmission according to the Signal Quality (Reference Signal Receiving Power (RSRP)) or Reference Signal Receiving Quality (RSRQ) or Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio) of Msg 1.

Alternatively, if the Network side device decides to configure the Msg3 repeat transmission for the terminal, the Network side device may transmit a dedicated Radio Network temporary Identity (RNTI Radio Network temporary Identity) for the Msg3 repeat transmission, such as DCI scrambled by a specific RA-RNTI, such as DCI 1_0 and Msg2, to configure the parameter for the Msg3 repeat transmission.

Alternatively, in the case where the terminal determines that DCI therein is a dedicated RNTI scrambling which is repeatedly transmitted through Msg3 based on the scheduling information, it may be determined that Msg3 is scheduled to be repeatedly transmitted.

Optionally, the parameter repeatedly transmitted by the Msg3, that is, the parameter other than the existing Msg3 configuration parameter, for example, the Msg3 repeat on indication, the number of Msg3 repeats, the Msg3 hopping type, and so on, may be indicated by using a reserved field in the dedicated RNTI scrambled DCI such as DCI 1_0 and Msg2 repeatedly transmitted by the Msg3, or by multiplexing the fields of the existing RA-RNTI scrambled DCI such as DCI 1_0 and Msg2 in combination with the existing Msg3 configuration parameter.

Optionally, the determining, by the terminal, that the network-side device supports the Msg3 repeated transmission based on the scheduling information and/or the system information includes:

determining that the Msg3 is scheduled to be repeatedly transmitted based on the scheduling information, and determining that the network side device supports Msg3 repeated transmission;

determining that the network side equipment supports the Msg3 repeated transmission based on the system information; wherein the system information is used for indicating that the network side equipment supports the Msg3 repeated transmission.

Optionally, in the random access procedure, if the Msg3 is to be repeatedly transmitted, it is determined not only whether the terminal supports the Msg3 repeated transmission, but also whether the network side, such as a cell, supports the Msg3 repeated transmission.

Optionally, when the network side device transmits the system information, the system information may carry a signaling, and a field indicates that the cell supports the repeated transmission of the Msg 3.

Therefore, the terminal can determine that the network-side device supports the Msg3 repeat transmission based on the system information.

Optionally, the additional information comprises a dedicated DMRS sequence repeatedly transmitted by Msg 3;

the terminal transmits Msg3 carrying additional information based on the scheduling information, and the Msg3 comprises:

under the condition that the terminal determines to report the additional information, generating a dedicated DMRS sequence repeatedly transmitted by the Msg3 based on a dedicated DMRS parameter repeatedly transmitted by the Msg3, wherein the dedicated DMRS parameter is indicated by the scheduling information or determined based on protocol predefinition;

performing a transmission of Msg3 using the dedicated DMRS sequence.

Alternatively, the terminal may indicate additional information of Msg3 using a dedicated DMRS sequence repeatedly transmitted by Msg 3.

Alternatively, the dedicated DMRS sequence may be generated by the terminal based on the dedicated DMRS parameters;

alternatively, the dedicated DMRS parameters may be protocol predefined;

optionally, the dedicated DMRS parameter may be indicated to the terminal by the network side device when the Msg3 is scheduled to repeat transmission;

optionally, in a case that the terminal determines that the additional information is to be reported, a dedicated DMRS sequence repeatedly transmitted by Msg3 may be generated based on the dedicated DMRS parameter repeatedly transmitted by Msg3, and the Msg3 transmission may be performed through the dedicated DMRS sequence transmission;

optionally, the network side may consider that the terminal supports the repeated transmission of Msg3 in the case of detecting the dedicated DMRS sequence in Msg 3;

alternatively, when detecting the dedicated DMRS sequence in the Msg3, the network side may consider the Msg3 currently transmitted as the Msg3 of the repeated transmission, that is, may consider the Msg3 currently transmitted as the transmission based on the rule corresponding to the random access procedure of the repeated transmission Msg 3.

Optionally, in a case that the Msg3 is scheduled to be transmitted repeatedly and the network side device supports Msg3 repeated transmission, the scheduling information includes a DMRS parameter dedicated to the Msg3 repeated transmission.

Alternatively, in the case that the Msg3 is scheduled for repeated transmission and the network side device supports Msg3 repeated transmission, the network side device may carry the dedicated DMRS parameters for the Msg3 repeated transmission in the scheduling information.

Optionally, after the terminal receives the scheduling information, if the terminal obtains the dedicated DMRS parameters, it may consider that the network side device schedules Msg3 for repeated transmission;

alternatively, after receiving the scheduling information, if the dedicated DMRS parameters are obtained in the terminal, the terminal may generate the dedicated DMRS sequence which is repeatedly transmitted by the Msg3 based on the dedicated DMRS parameters.

Optionally, the dedicated DMRS parameters comprise parameters of a sequence generation function and/or parameters of a DMRS resource mapping.

Optionally, the dedicated DMRS parameters may include parameters of the Msg3 repetitive transmission of the corresponding sequence generation function;

optionally, the dedicated DMRS parameters may include parameters for Msg3 to repeatedly transmit corresponding DMRS resource mappings;

optionally, the dedicated DMRS parameters may include parameters of the Msg3 repeating transmission of the corresponding sequence generation function, and parameters of the Msg3 repeating transmission of the corresponding DMRS resource mapping.

Optionally, the parameters of the sequence generating function include an initialization parameter c _init Input values and/or initialization parameters c _init The calculation method of (1);

wherein the generating of the Msg3 repeatedly transmitted dedicated DMRS sequence based on the repeatedly transmitted dedicated DMRS parameters of the Msg3 comprises:

initialization parameter c corresponding to Msg3 based on repeated transmission _init Generating a dedicated DMRS sequence repeatedly transmitted by Msg 3; and/or, a dedicated initialization parameter c based on the Msg3 repetitive transmission _init The specific DMRS sequence repeatedly transmitted by the Msg3 is generated.

Optionally, for CP-OFDM waveforms, the dedicated DMRS parameters may be parameters of the Msg3 repetitive transmission corresponding sequence generation function and/or parameters of DMRS resource mapping, wherein the parameters of the sequence generation function may include an initialization parameter c _init Input values and/or initialization parameters c _init The calculation method of (1).

Optionally, the Msg3 repeats transmitting the corresponding sequenceThe parameters of the column generation function may include an initialization parameter c corresponding to the Msg3 repeat transmission _init An input value of (a);

optionally, the parameters of the sequence generation function corresponding to the Msg3 repeated transmission may include an initialization parameter c corresponding to the Msg3 repeated transmission _init The calculation method of (1);

optionally, the parameters of the sequence generation function corresponding to the Msg3 repeated transmission may include an initialization parameter c corresponding to the Msg3 repeated transmission _init And Msg3 repeatedly transmits the corresponding initialization parameter c _init The calculation method of (1);

optionally, the parameters of the sequence generation function corresponding to the repeated transmission at Msg3 only include the initialization parameter c corresponding to the repeated transmission at Msg3 _init In the case of the input value of (3), the corresponding initialization parameter c may be repeatedly transmitted based on Msg3 _init And the values of the remaining parameters of the sequence generation function defined by the protocol, to generate a dedicated DMRS sequence which is repeatedly transmitted by Msg 3;

optionally, repeatedly transmitting the parameters of the corresponding sequence generation function at Msg3 includes only the initialization parameter c corresponding to Msg3 repeated transmission _init In the case of the calculation method (2), the corresponding initialization parameter c may be repeatedly transmitted based on the Msg3 _init Generating a special DMRS sequence repeatedly transmitted by the Msg3 according to the calculation mode of the DMRS sequence and the value of the residual parameter of the sequence generating function defined by the protocol;

optionally, the repeatedly transmitting the parameters of the corresponding sequence generation function at Msg3 includes repeatedly transmitting the corresponding initialization parameter c at Msg3 _init And Msg3 repeatedly transmits the corresponding initialization parameter c _init In the case of the calculation method (2), the corresponding initialization parameter c may be repeatedly transmitted based on the Msg3 _init And Msg3 repeatedly transmits the corresponding initialization parameter c _init And generating dedicated DMRS sequences repeatedly transmitted by the Msg3 according to the calculation method of (1) and the values of the remaining parameters of the sequence generating function defined by the protocol.

For example, for CP-OFDM waveforms, the dedicated DMRS parameters may be parameters of an m-sequence generation function or parameters of DMRS resource mapping;

optionally, the parameter of the M-sequence generating function is an initialization parameter c _init . I.e. using the newly defined initialization parameter c for repeatedly sent Msg3 _init . E.g. initialization parameter c _init Middle parameter

A new definition is made: for Msg3 transmission of four-step random access procedure, protocol defaults

For Msg3 repeat transmission, provision is made

For example, the initialization parameter c _init The calculation method can be newly defined. Initialization parameter c _init Into which a variable k is introduced. For Msg3 transmission of the four-step random access procedure, k is 0; for the repeated transmission of the Msg3, k is not equal to 0, and the specific value of k is related to the execution condition of the repeated transmission of the Msg 3.

For example, if the base station configures the terminal to repeat Msg3 transmission N times, and the terminal transmits Msg 3N times according to the base station configuration, k is 1; the number of Msg3 actually sent by the terminal is less than N, N/2, and k is 2. The correspondence between the specific value of k and the actual number of sending Msg3 may be defined by a protocol or notified by a system message.

For example, the base station allows the terminal to make the Msg3 repeat transmission, but does not configure the Msg3 repeat number, at which time the Msg3 repeat number is determined by the terminal. The terminal-selected Msg3 repetition number is associated with the parameter k. If the number of the Msg3 repetitions is 2, the parameter k is 1; if the number of repetitions of Msg3 is 3, the parameter k is 2, and so on. The correspondence between the specific value of k and the number of repetitions of the Msg3 may be defined by a protocol or notified by a system message.

Wherein one possibility c _init The form of (A) may be exemplified by:

i.e. Msg3 repeatedly transmits the corresponding initialization parameter c _init The calculation method of (b) may be to perform one or more operations, such as adding k, on the basis of the existing calculation method; k may be subtracted, or may be a mathematical operation that can be realized by multiplication, division, exponentiation, or the like, which is not limited in the embodiment of the present application.

Optionally, the parameter of the DMRS resource mapping comprises a first parameter w _f (k') and a second parameter Δ;

first parameter w corresponding to Msg3 based on repeated transmission _f (k') and/or a second parameter Δ, mapping the Msg3 repeated transmission dedicated DMRS sequences.

Optionally, for CP-OFDM waveforms or DFT-s-OFDM waveforms, the Msg3 repeatedly transmitting the corresponding parameters of the DMRS resource map may comprise Msg3 repeatedly transmitting the corresponding first parameters w _f (k'); optionally, for CP-OFDM waveforms or DFT-s-OFDM waveforms, the Msg3 repeatedly transmitting the corresponding parameters of the DMRS resource map may include Msg3 repeatedly transmitting the corresponding second parameters Δ;

optionally, for a CP-OFDM waveform or DFT-s-OFDM waveform, the Msg3 repeatedly transmitting the corresponding parameters of the DMRS resource map may comprise Msg3 repeatedly transmitting the corresponding first parameters w _f (k'), and Msg3 repeat the transmission of the corresponding second parameter Δ.

Optionally, repeatedly transmitting the corresponding DMRS resource map parameters at Msg3 only includes repeatedly transmitting the corresponding first parameter w at Msg3 _f (k'), the corresponding first parameter w may be repeatedly transmitted based on Msg3 _f (k'), and values of other parameters (protocol defined) required to map the Msg3 repeatedly transmitted dedicated DMRS sequences, map the Msg3 repeatedly transmitted dedicated DMRS sequences;

optionally, in a case where the parameter of the Msg3 repeatedly transmitting the corresponding DMRS resource map only includes the corresponding second parameter Δ of the Msg3 repeatedly transmitting, the dedicated DMRS sequence of the Msg3 repeatedly transmitting may be mapped based on the corresponding second parameter Δ of the Msg3 repeatedly transmitting and the remaining parameters (protocol defined) required for mapping the dedicated DMRS sequence of the Msg3 repeatedly transmitting;

optionally, repeatedly transmitting the corresponding DMRS resource mapping parameters at Msg3 includes repeatedly transmitting the corresponding first parameter w at Msg3 _f (k') and Msg3 may repeatedly transmit the corresponding first parameter w based on Msg3 when the corresponding second parameter Δ is repeatedly transmitted _f (k'), and Msg3 repeatedly transmits the corresponding second parameter Δ, and the remaining parameters (protocol defined) required to map the Msg3 repeatedly transmitted dedicated DMRS sequences, map the Msg3 repeatedly transmitted dedicated DMRS sequences.

For example, Msg3 transmission for a four-step random access procedure, w _f (0)＝+1,w _f (1) 1 ═ 1; for Msg3 repeat transmission, w _f (0)＝+1,w _f (1) Is-1. For another example, the transmission Δ is 0 for Msg3 and 1 for Msg 3.

Optionally, the parameter of the sequence generating function includes a first parameter α and/or a sequence group number u;

wherein the generating of the Msg3 repeatedly transmitted dedicated DMRS sequences based on the repeatedly transmitted dedicated DMRS parameters of the Msg3 comprises:

and generating a special DMRS sequence which is transmitted repeatedly by the Msg3 based on the first parameter alpha and/or the sequence group number u corresponding to the repeatedly transmitted Msg 3.

Optionally, for the DFT-s-OFDM waveform, the dedicated DMRS parameter may be a parameter of the Msg3 repeatedly transmitting a corresponding sequence generation function and/or a parameter of DMRS resource mapping, wherein the parameter of the sequence generation function may be the first parameter α and/or the sequence group number u.

Alternatively, in the case that the parameters of the Msg3 repetitive transmission of the corresponding sequence generation function only include the first parameter α corresponding to the Msg3 repetitive transmission, the dedicated DMRS sequence repeatedly transmitted by the Msg3 may be generated based on the first parameter α corresponding to the Msg3 repetitive transmission and the values of the remaining parameters of the sequence generation function defined by the protocol;

alternatively, in the case that the parameters of the Msg3 repetitive transmission of the corresponding sequence generation function only include the sequence group number u corresponding to the Msg3 repetitive transmission, the dedicated DMRS sequence repeatedly transmitted by the Msg3 may be generated based on the values of the Msg3 repetitive transmission of the corresponding sequence group number u and the remaining parameters of the sequence generation function defined by the protocol;

alternatively, in the case that the parameters of the Msg3 repetitive transmission of the corresponding sequence generation function include the first parameter α corresponding to the Msg3 repetitive transmission and the sequence group number u corresponding to the Msg3 repetitive transmission, the dedicated DMRS sequence repeatedly transmitted by the Msg3 may be generated based on the values of the first parameter α corresponding to the Msg3 repetitive transmission, the sequence group number u corresponding to the Msg3 repetitive transmission, and the remaining parameters of the sequence generation function defined by the protocol.

Optionally, the first parameter α is used to indicate a number of repeated transmissions of the Msg3 transmission.

Optionally, the candidate value of the first parameter α is determined based on a state quantity of additional information.

Optionally, for example, for parameter α, Msg3 transmission α of four-step random access procedure is 0, and Msg3 repeats transmission

t＝{0,1,…T-1},T>1。

Wherein the values of T and T are determined by the information content of the additional information. If only reporting whether the transmission is the Msg3 repeated transmission, T is 2, and T is 1. If Msg3 needs to be reported to repeat transmission to actually transmit, for example, T-4: when the Msg3 of the four-step random access procedure transmits, t is 0, and when the Msg3 repeats transmission and the actual transmission number is the same as the base station configuration number N, t is 1; when the Msg3 repeats transmission and the actual transmission number is less than the base station configuration number N, N/2, t is 2. The correspondence between the value of the variable t and the condition of the repeated transmission of the Msg3 can be defined by a protocol or notified by a system message.

Alternatively, for example, for the sequence group number u, the Msg3 transmission u of the four-step random access procedure uses a function defined by the protocol, and the Msg3 repeated transmission uses the newly defined function to determine u. Similarly to the above, the correspondence relationship between the sequence group number u and the Msg3 repeat transmission may be defined to indicate the execution of the configuration information. One possible way of defining is:

where k represents the relevant parameter for the repeated transmission of Msg 3.

Optionally, the additional information is carried on the first uplink control information UCI.

Alternatively, the terminal may transmit the additional information in a manner of multiplexing UCI on the Msg3 PUSCH.

Optionally, when the additional information is carried on the first uplink control information UCI, the Msg3 PUSCH DMRS may be sent as defined by the protocol.

Optionally, the terminal supporting the Msg3 repetition may report whether the Msg3 repetition is executed or whether the actual transmission condition of the Msg3 repeated transmission or the Msg3 repeated transmission is supported by a mode of attaching UCI to the Msg 3.

Optionally, for example, the UCI may be N-bit information, and is mapped onto at least one Msg3 slot, for example, the first Msg3 PUSCH transmission, according to a multiplexing manner of the UCI and the PUSCH. The correspondence of the N-bit information to the state of the Msg3 retransmission may be indicated by a protocol definition or a system message.

During mapping, a specific at least one RE in the Msg3 PUSCH time-frequency resources may be left out in a puncturing (puncturing) or rate matching (rate matching) manner to map UCI symbols;

optionally, the specific at least one RE may be an RE on a DMRS neighbor symbol.

and under the condition that the terminal determines to report the additional information, performing the repeated transmission of the Msg3 based on the special RNTI repeatedly transmitted by the Msg 3.

Optionally, the network side device may define two different RNTIs, including a dedicated RNTI used in the Msg3 repeated transmission process and an RNTI used in the Msg3 single transmission process of four-step random access.

Optionally, the terminal may transmit the additional information by using the dedicated RNTI.

Alternatively, the dedicated RNTI may be predefined based on a protocol;

alternatively, the dedicated RNTI can be scaled on the basis of the RA-RNTI or TC-RNTI based on parameters provided by the system information.

Alternatively, when the number of repeated transmissions of the Msg3 transmission is indicated, different numbers of repetitions may correspond to different RNTIs.

Optionally, after receiving the Msg3, the network side may determine the Msg3 repeat transmission capability of the terminal based on the special RNTI used by the Msg 3;

alternatively, the network side may determine that the terminal does not support the Msg3 repeat transmission based on the RNTI used by the Msg3 which is a four-step random access procedure after receiving the Msg 3.

Optionally, after receiving the Msg3, the network side device may perform blind detection to determine the dedicated RNTI, and then may determine the Msg3 retransmission capability of the terminal.

Optionally, after receiving the Msg3, the network side device may perform blind detection to determine the dedicated RNTI, and then may determine the number of times of the Msg3 repeated transmission corresponding to the dedicated RNTI.

Optionally, the receiving the scheduling information of the network side includes:

receiving the special RNTI scrambled DCI repeatedly transmitted by the Msg3, wherein the special RNTI scrambled DCI repeatedly transmitted by the Msg3 is used for indicating the Msg2 PDSCH carrying the Msg3 repeated transmission configuration parameters.

Alternatively, if the dedicated RNTI needs to be obtained by scaling on the basis of the RA-RNTI or TC-RNTI based on the parameters in the DCI 1_0 and the Msg2 scrambled by the dedicated RNTI, the DCI scrambled by the dedicated RNTI can be firstly received to determine the Msg2 PDSCH carrying the Msg3 repeated transmission configuration parameters.

Optionally, the Msg3 repeatedly transmitted dedicated RNTI scrambled DCI is detected by the terminal in the Msg3 repeatedly transmitted dedicated search space or Msg3 repeatedly transmitted dedicated CORESET.

Alternatively, the network side device may define two different search spaces and two different CORESETs, including a dedicated search space for Msg3 retransmission and a dedicated CORESET for Msg3 retransmission.

Optionally, the network side device may define two different search spaces and two different CORESET, where the two different search spaces include a dedicated search space used when the Msg3 repeats the transmission process, and a search space used when the Msg3 of the four-step random access procedure performs a single transmission process; and, CORESET used when Msg3 repeats the transmission process, and CORESET used when Msg3 of the four-step random access procedure is a single transmission process.

Optionally, the core set or the search space where the corresponding special RNTI scrambled DCI 1-0 is repeatedly transmitted by the Msg3 is different from the core set or the search space where the RA-RNTI scrambled DCI 1-0 is single-transmitted by the Msg3 with four-step random access.

Optionally, the common terminal that does not support the Msg3 repeated transmission or does not report additional information only needs to detect the CORESET or search space defined by the existing protocol, and transmits Msg3 according to the DCI scrambled by the RA-RNTI and the corresponding RAR.

Alternatively, a terminal supporting the Msg3 to repeatedly transmit or report additional information may detect two CORESET or search space, respectively.

Optionally, a terminal supporting the Msg3 repeated transmission or reporting of the additional information may search DCI in the dedicated CORESET or the dedicated search space, and if DCI 1-0 scrambled by the corresponding dedicated RNTI is detected and RAR is successfully resolved, the terminal does not detect the common CORESET or the search space.

Alternatively, the network side device may transmit the RA-RNTI scrambled DCIs 1-0 and the corresponding Msg2 PDSCH on the dedicated CORESET or dedicated search space and the normal CORESET or normal search space, respectively, without determining the terminal capability and with poor terminal signal quality (i.e., requiring the Msg3 to repeat the transmission).

optionally, after receiving the Msg3, the network side may determine that the terminal does not support Msg3 repeated transmission based on the common RNTI used by the Msg 3;

optionally, the time-frequency resources of the first time slot of Msg3 transmission scheduled by two RARs are not the same. The base station detects the Msg3 on two different time-frequency resources to determine the capability of the terminal.

Alternatively, the time-frequency resources of the first time slot of Msg3 transmission scheduled by two RARs are the same, and then several methods are combined to distinguish the common terminal from the terminal with Msg3 repeated transmission.

and under the condition that the terminal determines to report the additional information, determining the special time domain resource repeatedly transmitted by the Msg3 based on the special time domain resource configuration repeatedly transmitted by the Msg3, and executing the repeated transmission of the Msg 3.

The Msg3 carrying the additional information and the Msg3 of the four-step random access process can be distinguished through different time domain resources;

optionally, the network side device may transmit DCI 1-0 scrambled by RA-RNTI and RAR. And the terminal reads and executes the scheduling information according to the equipment capability.

For example, a generic terminal may send Msg3 according to parameters defined in existing protocols; the terminal with the Msg3 repetition interprets the DCI 1-0 scrambled by RA-RNTI and RAR according to the newly defined parameters.

Specifically, a terminal with the Msg3 repetition may use a dedicated TDRA table to interpret RAR or use a different parameter k2 to determine a timeslot for Msg3 transmission, so that a time domain resource occupied by the Msg3 repetition transmission is different from a time domain resource occupied by the Msg3 transmission of the four-step random access procedure;

alternatively, the terminal with the Msg3 repetition may use a dedicated TDRA table to interpret the RAR or use a different parameter k2 to determine the timeslot for Msg3 transmission, so that the first timeslot for Msg3 repetition transmission is different from the timeslot for Msg3 of the four-step random access procedure.

Alternatively, the network side device may detect the Msg3 on different time domain resources, so as to determine the Msg3 transmission condition of the terminal, or determine the Msg3 repeat transmission capability of the terminal.

For example, the normal terminal determines a time domain resource to perform transmission of Msg3 based on the normal TDRA; the terminal that repeatedly transmits the Msg3 or the terminal that reports the additional information may determine a dedicated time domain resource based on the dedicated TDRA to perform the transmission of the Msg 3.

Optionally, the receiving of the scheduling information of the network side includes any one of:

when the fact that the network side equipment supports the repeated transmission of the Msg3 is determined through the system information, resolving the scheduling information based on a resolution mode corresponding to the repeated transmission of the Msg 3;

repeatedly transmitting the corresponding resolution mode to resolve the scheduling information based on the Msg 3;

parsing the scheduling information based on the parsing mode corresponding to the Msg3 repeat transmission, and parsing the scheduling information based on the parsing mode corresponding to the Msg3 single transmission after the parsing of the scheduling information based on the parsing mode corresponding to the Msg3 repeat transmission fails.

Optionally, for a common terminal (a terminal that does not support the Msg3 for repeated transmission, or a terminal that determines not to report additional information), the DCI 1_0 and the Msg2 scrambled by the received RA-RNTI may be parsed according to a rule defined in the protocol; and sends Msg3 according to the parsed configuration parameters according to the RACH procedure (single Msg3 send) defined in the protocol.

Optionally, for a terminal reporting the additional information or a terminal repeatedly sending Msg3, the DCI 1_0 scrambled by the RA-RNTI and the Msg2 may be parsed according to a predefined rule; for example, the method comprises the steps of firstly analyzing according to a format repeated by Msg3, and then analyzing according to a common format if the analysis fails; also for example, parsing in conjunction with system information; and for example, the format is only analyzed according to the Msg3 repetition. Then, the Msg3 is sent according to the analysis result.

Alternatively, a terminal reporting additional information or a terminal repeatedly sending Msg3 may be referred to as an Msg3 enhanced terminal.

Optionally, the method further comprises:

under the condition that the terminal determines not to report the additional information, transmitting the Msg3 which does not carry the additional information based on the scheduling information;

wherein the terminal determines not to report the additional information, and the determining includes at least one of:

the terminal determines that the Msg3 is scheduled for repeated transmission based on the scheduling information and that the terminal does not support Msg3 repeated transmission;

the terminal determines that the Msg3 is scheduled to be single transmission based on the scheduling information, and determines that the network side device supports Msg3 repeated transmission based on the scheduling information and/or the system information;

and the terminal determines that the network side equipment does not support the Msg3 repeated transmission or the terminal does not support the Msg3 repeated transmission based on the scheduling information and/or the system information.

Optionally, if the network side device schedules the Msg3 for repeated transmission and the terminal supports the Msg3 for repeated transmission, the terminal may determine to transmit the additional information;

optionally, if the network side device schedules the Msg3 for repeated transmission and the terminal does not support the Msg3 for repeated transmission, the terminal may determine not to transmit the additional information;

alternatively, if the network-side device schedules the Msg3 single transmission and supports the Msg3 repeated transmission, and the terminal supports the Msg3 repeated transmission, the terminal may determine to transmit the additional information;

optionally, if the network side device schedules the Msg3 single transmission and supports the Msg3 repeated transmission, and the terminal does not support the Msg3 repeated transmission, the terminal may determine not to transmit the additional information;

alternatively, if the network side device does not support the Msg3 duplicate transmission, the terminal may determine not to send the additional information.

Optionally, the terminal may determine whether the network-side device schedules the Msg3 to repeat transmission based on the scheduling information;

optionally, the terminal may determine whether the network-side device supports the Msg3 repeat transmission based on the system information and/or the scheduling information;

alternatively, if the network side device is determined to schedule the Msg3 for repeated transmission based on the scheduling information, the network side device is determined to support the Msg3 for repeated transmission.

Fig. 4 is a second flowchart of the random access method according to the embodiment of the present application, and as shown in fig. 4, the method includes the following steps:

step 400, the network side equipment sends scheduling information, wherein the scheduling information is used for scheduling Msg 3;

step 410, a network side device receives the Msg3 transmitted by a terminal based on the scheduling information, wherein the Msg3 carries additional information;

step 420, the network side device completes random access based on the Msg3 carrying the additional information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

Alternatively, in order to reduce the complexity of detecting Msg3 by a network side device such as a base station, a small amount of additional information may be sent simultaneously when Msg3 sends to indicate the type of terminal for assisting the base station in detecting Msg 3.

Optionally, the additional information may be only 1-2 bit of indication information.

Alternatively, a terminal supporting the Msg3 repetition may provide additional information by multiplexing a dedicated DMRS sequence repeatedly transmitted through Msg3 or a TC-RNTI of the UCI or Msg3 PUSCH when transmitting Msg 3.

alternatively, the additional information may be used to indicate the actual number of transmissions that the Msg3 repeatedly transmits.

Optionally, the network side device may determine the type of the terminal according to the detection result, that is, determine whether the terminal supports the repetitive transmission of the Msg3, or whether the currently transmitted Msg3 is a repetitive transmission, and determine a subsequent action.

In the embodiment of the application, a terminal supporting the Msg3 repetition provides additional information through a dedicated DMRS or a TC-RNTI multiplexing UCI or Msg3 PUSCH when transmitting Msg 3. The additional information is used for indicating the actual execution situation of whether the terminal performs the Msg3 repeated transmission or whether the terminal performs random access according to the RACH flow of the Msg3 repeated transmission or the Msg3 repeated transmission, so that the network side device can determine the terminal performing the Msg3 repeated transmission or determine whether the terminal performs the flow of the Msg3 repeated transmission through the additional information carried by the Msg 3.

Optionally, the network side device completes random access based on the Msg3 carrying the additional information, including:

determining a decoding form for decoding the Msg3 based on the additional information;

wherein the decoding form comprises: a single-decoding version that decodes Msg3 for a single transmission, and a repeated-decoding version that decodes Msg3 for a repeated transmission.

Alternatively, when the network side device decodes Msg3, Msg3 can be decoded in two ways;

optionally, the network side device may determine a decoding format for decoding the Msg3 after determining the Msg3 retransmission capability of the terminal based on the additional information;

alternatively, if the network-side device determines that the terminal supports the Msg3 duplicate transmission or determines that the Msg3 of the current transmission is the Msg3 of the duplicate transmission, the Msg3 of the duplicate transmission may be decoded based on the duplicate decoding form;

alternatively, if the network side device determines that the terminal does not support the Msg3 duplicate transmission, the Msg3 of the single transmission may be decoded based on a single decoding form.

Optionally, the sending, by the network side device, scheduling information includes:

in the case that the network side device determines to schedule the Msg3 repeat transmission, the scheduling information includes the Msg3 dedicated RNTI scrambled DCI and Msg2 for the repeat transmission.

Optionally, in the random access procedure, the terminal sends an Msg1 message, and the Msg1 parameters are the same as Msg1 parameters defined in the existing protocol. The network side device blindly detects the Msg1 and decides whether to configure Msg3 for the terminal to repeat transmission according to the signal quality (PSRP or RSRQ or SINR etc.) of the Msg 1.

Alternatively, if the network side device decides to configure Msg3 repeat transmission for the terminal, the network side device may send a dedicated RNTI scrambled DCI (such as DCI 1_0) for Msg3 repeat transmission and associated Msg2 to configure parameters for Msg3 repeat transmission.

Alternatively, in the case where the terminal determines that DCI therein is a dedicated RNTI scrambling repeatedly transmitted through Msg3 based on the scheduling information, it may be determined that Msg3 is scheduled to be repeatedly transmitted.

Optionally, the parameter of the Msg3 repeated transmission, i.e. the parameter other than the existing Msg3 configuration parameter, such as Msg3 repeated on indication, Msg3 repeated times, Msg3 hopping type, etc., may be indicated by using a specific field in the dedicated RNTI scrambled DCI and the associated Msg2 of the Msg3 repeated transmission, or by multiplexing fields of the existing RA-RNTI scrambled DCI 1_0 and Msg2 in combination with the existing Msg3 configuration parameter.

Optionally, the network side device completes random access based on the Msg3, including:

the network side equipment blindly detects the Msg3 transmitted for the first time, and determines at least one of the following indicated by the additional information:

the number of repeated transmissions of the Msg3 transmission.

Alternatively, the network side device may blind-detect the Msg3 at the first slot of the Msg3, that is, blind-detect the Msg3 transmitted for the first time, and determine additional information of the Msg 3.

The network side device can schedule the Msg3 on the first slot to detect and decode the Msg3 in the Msg3 parameter detection and decoding mode of the Msg3 carrying additional information, namely, the Msg3 in the repeated decoding mode. If the base station successfully decodes in the form of repetition decoding, it indicates that the terminal is performing the Msg3 retransmission or that the terminal supports the Msg3 retransmission.

Alternatively, if the network side device schedules the Msg3 to send repeatedly, the network side device may use both forms to detect Msg3 on the first slot.

Optionally, in a case where the network side device determines to schedule the Msg3 for repeated transmission, the scheduling information includes a dedicated DMRS parameter for the Msg3 for repeated transmission.

Alternatively, the dedicated DMRS sequences may be generated by the terminal based on the dedicated DMRS parameters;

alternatively, the dedicated DMRS parameters may be protocol predefined;

optionally, the network side may consider that the terminal supports repeated transmission of Msg3 when detecting a dedicated DMRS sequence in Msg 3;

Optionally, the blind-detecting, by the network-side device, the Msg3 transmitted for the first time includes:

and in the case that the dedicated DMRS is detected, determining that the terminal supports Msg3 repeated transmission or Msg3 is Msg3 of repeated transmission.

Optionally, the additional information is carried on first uplink control information UCI;

the network side device blindly detects the Msg3 transmitted for the first time, and the method comprises the following steps:

and directly determining that the terminal supports the Msg3 repeated transmission or the Msg3 is the Msg3 of the repeated transmission based on the first uplink control information UCI.

Alternatively, the terminal may transmit the additional information by multiplexing UCI on the Msg3 PUSCH.

Optionally, after receiving the first uplink control information UCI, the network side may directly determine that the terminal supports the Msg3 duplicate transmission or the Msg3 is the Msg3 of the duplicate transmission based on the indication of the first uplink control information UCI.

Optionally, for example, the UCI may be N-bit information, and may be mapped onto at least one Msg3 slot, for example, on the first Msg3 PUSCH transmission, according to a multiplexing manner of the UCI and the PUSCH. The correspondence of the N-bit information to the state of the Msg3 retransmission may be indicated by a protocol definition or a system message.

In mapping, the mapping can be performed in a manner of a specific at least one RE of the downlink Msg3 PUSCH;

optionally, the specific at least one Resource Element (RE) may be a RE on a DMRS neighbor symbol.

in the case that the terminal is determined to transmit the Msg3 based on the dedicated time domain resources of the Msg3 repeat transmission, the terminal is determined to support the Msg3 repeat transmission or the Msg3 is the Msg3 of the repeat transmission.

optionally, the network side device may transmit the RA-RNTI scrambled DCI 1-0 and RAR. And the terminal reads and executes the scheduling information according to the equipment capability.

Specifically, the terminal with the Msg3 duplicate may use a dedicated TDRA table to interpret the RAR or use a different parameter k2 to determine the timeslot for Msg3 transmission, so that the time domain resources occupied by the Msg3 duplicate transmission are different from the time domain resources occupied by the ordinary Msg3 transmission;

alternatively, a terminal with a duplicate Msg3 may use a dedicated TDRA table to interpret the RAR or use a different parameter k2 to determine the timeslot for Msg3 transmission, such that the first timeslot for Msg3 duplicate transmission is different from the timeslot for normal Msg 3.

in case that it is determined that the terminal transmits Msg3 based on the private RNTI of the Msg3 repetitive transmission, it is determined that the terminal supports the Msg3 repetitive transmission or that the Msg3 is the Msg3 of the repetitive transmission.

Optionally, the network side device may define two different RNTIs, including a dedicated RNTI used in the Msg3 repeated transmission process and an RNTI used in the ordinary Msg3 single transmission process.

Alternatively, the dedicated RNTI may be determined based on protocol predefinition;

Alternatively, when the number of repeated transmissions of the Msg3 transmission is indicated, different numbers of repeated transmissions may correspond to different RNTIs.

optionally, the network side may determine that the terminal does not support the Msg3 repeat transmission based on the use of the common RNTI by the Msg3 after receiving the Msg 3.

sending the special RNTI scrambled DCI repeatedly transmitted by the Msg3 on a special search space or a special CORESET repeatedly transmitted by the Msg 3.

Optionally, the network side device may define two different search spaces and two different CORESET, where the two different search spaces include a dedicated search space used when the Msg3 repeats the transmission process, and a search space used when the Msg3 performs a single transmission process; and CORESET used when Msg3 repeats the transmission process, and CORESET used when normal Msg3 single transmission process.

Optionally, the core set or the search space where the corresponding RA-RNTI scrambled DCI 1-0 is repeatedly transmitted by the Msg3 is different from the core set or the search space where the RA-RNTI scrambled DCI 1-0 is transmitted by the normal Msg 3.

Optionally, a terminal supporting the Msg3 repeated transmission or reporting of additional information may detect two core sets or search spaces, respectively.

optionally, the time-frequency resources of the first time slot of Msg3 transmission scheduled by two RARs are not the same. The base station detects Msg3 on two different time-frequency resources to determine the capability of the terminal.

Alternatively, the time-frequency resources of the first slot of Msg3 transmission scheduled by two RARs are the same, and then the ordinary terminal and the terminal of Msg3 repeated transmission need to be distinguished by combining other additional information in Msg 3.

in case that it is determined that the terminal performs the transmission of the Msg3 based on the dedicated search space of the Msg3 repetitive transmission or the DCI scrambled by the dedicated RNTI in the dedicated CORESET, it is determined that the terminal supports the Msg3 repetitive transmission or that the Msg3 is the Msg3 of the repetitive transmission.

optionally, the network side device completes random access based on the Msg3, and includes at least one of:

stopping decoding in a single decoding form when the network side equipment schedules the Msg3 to repeatedly transmit through the scheduling information and the decoding in the single decoding form is successful;

in the case that the network side device schedules the Msg3 for repeated transmission through the scheduling information and the decoding is unsuccessful in the single decoding mode, and determines that the terminal supports the Msg3 for repeated transmission or determines that the Msg3 is the Msg3 for repeated transmission, scheduling the Msg3 for repeated transmission again;

when the network side equipment schedules the Msg3 to repeatedly transmit through the scheduling information and the decoding is successful in the repeated decoding mode, the Msg4 is sent according to a random access flow;

scheduling the Msg3 for repeated transmission again under the condition that the network side equipment schedules the Msg3 for repeated transmission through the scheduling information, decoding is unsuccessful in the repeated decoding mode, and the terminal is determined to support the Msg3 for repeated transmission or the Msg3 is determined to be the Msg3 for repeated transmission;

and in the case that the network side equipment schedules the Msg3 single transmission through the scheduling information, the decoding is unsuccessful in the repeated decoding mode, and the terminal is determined to support the Msg3 repeated transmission or the Msg3 is determined to be the Msg3 of the repeated transmission, the Msg3 repeated transmission is scheduled again.

Optionally, the network side device may blindly detect Msg3 at the first slot of Msg3 or other slots, and determine additional information of Msg 3.

The network side device may schedule Msg3 to detect and decode Msg3 with the parameters of normal Msg3 and Msg3 in the newly defined Msg3 format on the first slot or other slots. If the base station successfully decodes according to the newly defined Msg3 form, it indicates that the terminal is performing the Msg3 repeat transmission or that the terminal supports the Msg3 repeat transmission.

Alternatively, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network side device schedules the Msg3 to send repeatedly, the network side device may use two forms to detect Msg3 on the first slot or other slots.

Alternatively, taking the example that the additional information is carried by the dedicated DMRS sequence, if the network side device succeeds in decoding in the first time slot using the normal Msg3 form, the network side device may stop decoding using the normal Msg3 form, and the base station sends Msg4 according to the normal RACH procedure.

Optionally, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network side device detects DMRS in the first time slot using a normal Msg3 format but does not decode successfully, the base station schedules Msg3 retransmission according to a normal RACH procedure.

Alternatively, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network side device succeeds in decoding in the first time slot using the Msg3 repetition mode, the base station sends Msg4 according to the RACH procedure.

Alternatively, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network-side device detects a DMRS in the first slot using the Msg3 retransmission format but does not decode successfully, the base station continues to receive Msg3 other copies on the following scheduled Msg3 slot to attempt decoding.

Alternatively, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network side device supports the Msg3 repeated transmission flow through the system information broadcasting base station, or the network side device schedules a single Msg3 transmission in DCI 1_0 and Msg2 scrambled by using a specific RA-RNTI, or the DCI 1_0 and Msg2 scrambled by using the RA-RNTI instruct the terminal to transmit in the Msg3 repeated form, the terminal transmits in the Msg3 repeated form, and the network side device performs detection and decoding in two repeated forms of normal Msg3 and Msg 3.

Alternatively, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network side device detects a DMRS in a form that Msg3 repeats, but Msg3 decoding fails, the network side device uses Msg3 to repeat DCI0-0 scrambled by the corresponding TC-RNTI and schedules Msg3 retransmission. The Msg3 indicates the repetition times of the Msg3 retransmission in the DCI0-0 scrambled by the corresponding TC-RNTI.

Optionally, the scheduling Msg3 to repeat transmission comprises:

the Msg3 is scheduled for repeated transmission using the dedicated RNTI scrambled DCI of the Msg3 repeated transmission.

Alternatively, taking the example that the additional information is carried by the dedicated DMRS sequence, if the network-side device detects the dedicated DMRS sequence in the form of Msg3 repeatedly transmitting the corresponding repeated resolution, but Msg3 fails to decode, the network-side device may use Msg3 to repeat the DCI0-0 scrambled by the corresponding TC-RNTI to schedule the Msg3 retransmission.

Optionally, the Msg3 repeats the number of repetitions indicated by the Msg3 retransmission in the corresponding TC-RNTI scrambled DCI 0-0.

determining that the terminal supports the Msg3 retransmission or that the Msg3 is the Msg3 of the retransmission when a repeat decoding format is used, but in the event that the decoding fails, continuing to detect a subsequent Msg 3;

in case of successful decoding using the repeated decoding format, the timer of the Msg4 is turned on according to the Msg3 repeated transmission flow.

Optionally, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network side device detects DMRS using a normal Msg3 format or decoding is successful, a corresponding timer is started according to a normal RACH procedure.

Optionally, taking the example that the additional information is carried by a dedicated DMRS sequence, if the network-side device detects a DMRS using the Msg3 repetition pattern but fails to decode, it continues to detect the Msg3 copy in the subsequent slot, and sends TC-RNTI scrambled DCI0-0 to schedule the Msg3 retransmission after the last copy of Msg3 is received and still fails to decode.

Alternatively, taking the example that the additional information is carried by the dedicated DMRS sequence, if the network side device succeeds in decoding using the Msg3 repetition mode, the base station starts the timer of Msg4 according to the Msg3 repetition procedure. For example, the Timer turn-on time may be different from the turn-on time of a normal Msg3, e.g., the first slot after the nth transmission of Msg 3; the duration of the Timer may not be equal to the Timer of the normal Msg3, e.g., the end time of the Timer is aligned with the end time of the Timer of the normal Msg3

Optionally, after the continuing to detect the subsequent Msg3, further comprising:

in case of detection that the last Msg3 still failed decoding, Msg3 is scheduled for repeated transmission using dedicated RNTI scrambled DCI for repeated transmission of Msg 3.

Alternatively, taking the example that the additional information is carried by a dedicated DMRS sequence, if the base station detects a DMRS using the Msg3 repetition pattern but fails to decode, it continues to detect the Msg3 copy of the subsequent slot, and sends TC-RNTI scrambled DCI0-0 after the decoding failure after the last copy of Msg3 is received to schedule the Msg3 retransmission.

It should be noted that, in the random access method provided in the embodiment of the present application, the execution main body may be a random access apparatus, or a control module in the random access apparatus for executing the random access method. In the embodiment of the present application, a random access apparatus executing a random access method is taken as an example to describe the random access apparatus provided in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of a random access apparatus provided in an embodiment of the present application, and as shown in fig. 5, the random access apparatus includes the following modules: a first receiving module 510 and a first transmitting module 520; wherein: the first receiving module 510 is configured to receive scheduling information on the network side, where the scheduling information is used to schedule transmission of the Msg 3;

the first transmission module 520 is configured to transmit the Msg3 carrying additional information based on the scheduling information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

Optionally, the random access device may receive scheduling information on the network side through the first receiving module 510, where the scheduling information is used to schedule transmission of the Msg 3; the Msg3 carrying the additional information may then be transmitted based on the scheduling information by the first transmission module 520.

Optionally, the first transmission module is further configured to:

Optionally, the first transmission module is configured to:

determining that the network side equipment supports the Msg3 repeated transmission based on the system information; the system information is used for indicating the network side equipment to support the Msg3 repeated transmission.

wherein the first transmission module is configured to:

under the condition that the terminal determines to report the additional information, generating a dedicated DMRS sequence repeatedly transmitted by the Msg3 based on dedicated DMRS parameters repeatedly transmitted by the Msg3, wherein the dedicated DMRS parameters are indicated by scheduling information or determined based on protocol predefinition;

performing a transmission of Msg3 using the dedicated DMRS sequence.

Optionally, the parameter of the sequence generating function includes an input value of the initialization parameter c _ init and/or a calculation mode of the initialization parameter c _ init;

wherein the first transmission module is configured to:

generating a special DMRS sequence of the Msg3 repeated transmission based on an input value of an initialization parameter c _ init corresponding to the repeatedly transmitted Msg 3; and/or generating a special DMRS sequence repeatedly transmitted by the Msg3 based on a calculation mode of a special initialization parameter c _ init repeatedly transmitted by the Msg 3.

Optionally, the parameters of the DMRS resource mapping comprise a first parameter w _ f (k') and a second parameter Δ;

wherein the first transmission module is configured to:

and mapping the dedicated DMRS sequence repeatedly transmitted by the Msg3 based on the first parameter w _ f (k') and/or the second parameter delta corresponding to the repeatedly transmitted Msg 3.

wherein the first transmission module is configured to:

Optionally, the first transmission module is configured to:

Optionally, the first receiving module is configured to:

Optionally, the first transmission module is configured to:

Optionally, the first receiving module is configured to:

when the network side equipment is determined to support the repeated transmission of the Msg3 through the system information, resolving the scheduling information based on a resolution mode corresponding to the repeated transmission of the Msg 3;

Optionally, the method further comprises:

a second transmission module, configured to transmit, based on the scheduling information, the Msg3 without carrying additional information when the terminal determines not to report the additional information;

wherein the terminal determines not to report the additional information, and the additional information includes at least one of the following:

The random access device in the embodiment of the present application may be a device, a device or an electronic device having an operating system, or may be a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The random access apparatus provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 3, and achieve the same technical effect, and is not described here again to avoid repetition.

Fig. 6 is a second schematic structural diagram of a random access apparatus according to an embodiment of the present application, as shown in fig. 6, including the following modules: a first sending module 610, a second receiving module 620 and a random access module 630; wherein:

the first sending module 610 is configured to send scheduling information, where the scheduling information is used to schedule Msg 3;

the second receiving module 620 is configured to receive the Msg3 transmitted by the terminal based on the scheduling information, where the Msg3 carries additional information;

the random access module 630 is configured to complete random access by the network side device based on the Msg3 carrying the additional information;

wherein the additional information is used to indicate at least one of:

the number of retransmissions of the Msg3 transmission.

In the embodiment of the application, when the Msg3 is transmitted to the network side device through the terminal, additional information is carried to indicate whether the terminal supports Msg3 repeated transmission and whether the Msg3 is Msg3 repeated transmission to the network side device; and the number of repeated transmissions of the current Msg3 transmission enables the network side equipment to directly obtain the type of the terminal, and then the Msg3 detection is performed based on the type of the terminal, so that the number of blind detection of the network side equipment can be greatly reduced, and the time delay of a random access process is greatly shortened.

Alternatively, the random access device may transmit scheduling information for scheduling the Msg3 through the first transmitting module 610; the Msg3 transmitted by the terminal based on the scheduling information can be received through the second receiving module 620, and the Msg3 carries additional information; random access may then be completed by the random access module 630 based on the Msg3 carrying the additional information.

Optionally, the random access module is configured to:

wherein the decoded form comprises: a single-decoding version that decodes Msg3 for a single transmission, and a repeated-decoding version that decodes Msg3 for a repeated transmission.

Optionally, the first sending module is configured to:

Optionally, the random access module is configured to:

the number of repeated transmissions of the Msg3 transmission.

Optionally, in a case where the network side device determines to schedule the Msg3 repeated transmission, the scheduling information includes a dedicated DMRS parameter for the Msg3 repeated transmission.

Optionally, the random access module is configured to:

the random access module is configured to:

and determining that the terminal supports the Msg3 repeated transmission or the Msg3 is the Msg3 of the repeated transmission directly based on the first uplink control information UCI.

Optionally, the random access module is configured to:

in the case that the terminal is determined to transmit the Msg3 based on the dedicated time domain resources of the Msg3 repeated transmission, the terminal is determined to support the Msg3 repeated transmission or the Msg3 is the Msg3 of the repeated transmission.

Optionally, the random access module is configured to:

Optionally, the first sending module is configured to:

Optionally, the random access module is configured to:

Optionally, the random access module is configured to perform at least one of:

under the condition that the network side equipment schedules the Msg3 repeated transmission through the scheduling information and the decoding is unsuccessful in the single decoding mode and the terminal is determined to support the Msg3 repeated transmission or the Msg3 is determined to be the Msg3 of repeated transmission, the Msg3 repeated transmission is scheduled again;

under the condition that the network side equipment schedules the Msg3 for repeated transmission through the scheduling information and the decoding is successful in the repeated decoding mode, the Msg4 is sent according to a random access flow;

Optionally, the random access module is configured to:

the Msg3 repeat transmission is scheduled using a dedicated RNTI scrambled DCI of the Msg3 repeat transmission.

Optionally, the random access module is configured to:

in case the decoding succeeds using the repeated decoding form, the transmission flow is repeated according to Msg3 to turn on the timer of Msg 4.

Optionally, the method further comprises:

a first scheduling module for scheduling the Msg3 for repeated transmission using the dedicated RNTI scrambled DCI for the Msg3 repeated transmission in case of detection of a still decoding failure to the last Msg3 after said continuing detection of the subsequent Msg 3.

The random access device in the embodiment of the present application may be a device, a device or an electronic device having an operating system, or may be a component, an integrated circuit, or a chip in a terminal. The device or the electronic equipment can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the type of the terminal 11 listed above, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a television (television), a teller machine (TV), a self-service machine (kiosk), or the like, and the embodiments of the present application are not limited in particular.

The random access apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiment of fig. 4, and achieve the same technical effect, and is not described here again to avoid repetition.

Optionally, fig. 7 is a schematic structural diagram of a communication device provided in an embodiment of the present application, as shown in fig. 7, an embodiment of the present application further provides a communication device 700, which includes a processor 701, a memory 702, and a program or an instruction stored in the memory 702 and executable on the processor 701, for example, when the communication device 700 is a terminal, the program or the instruction is executed by the processor 701 to implement each process of the foregoing random access method embodiment, and the same technical effect can be achieved. When the communication device 700 is a network-side device, the program or the instructions are executed by the processor 701 to implement the processes of the random access method embodiments, and the same technical effect can be achieved.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface,

the communication interface is to:

the processor is configured to:

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

The terminal embodiment corresponds to the terminal-side method embodiment, and all implementation processes and implementation manners of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, fig. 8 is a schematic diagram of a hardware structure of a terminal for implementing the embodiment of the present application.

The terminal 800 includes, but is not limited to: at least part of the radio frequency unit 801, the network module 802, the audio output unit 803, the input unit 804, the sensor 805, the display unit 806, the user input unit 807, the interface unit 808, the memory 809, and the processor 810, and the like.

Those skilled in the art will appreciate that the terminal 800 may further comprise a power supply (e.g., a battery) for supplying power to various components, and the power supply may be logically connected to the processor 810 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal structure shown in fig. 8 does not constitute a limitation of the terminal, and the terminal may include more or less components than those shown, or combine some components, or have a different arrangement of components, and thus will not be described again.

It should be understood that in the embodiment of the present application, the input Unit 804 may include a Graphics Processing Unit (GPU) 8041 and a microphone 8042, and the Graphics Processing Unit 8041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 807 includes a touch panel 8071 and other input devices 8072. A touch panel 8071, also referred to as a touch screen. The touch panel 8071 may include two portions of a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In the embodiment of the present application, the radio frequency unit 801 receives downlink data from a network side device, and then processes the downlink data to the processor 810; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 801 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.

Memory 809 may be used to store software programs or instructions and various data. The memory 809 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 809 can include a high-speed random access Memory, and can also include a nonvolatile Memory, wherein the nonvolatile Memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 810 may include one or more processing units; alternatively, the processor 810810 may integrate an application processor that handles primarily the operating system, user interface, and application programs or instructions, etc. with a modem processor that handles primarily wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 810810.

Wherein the content of the first and second substances,

a processor 810 configured to:

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

Optionally, the processor 810 is configured to:

determining that the Msg3 is scheduled for the repeated transmission if the scheduling information is scrambled by a dedicated RNTI of the Msg3 repeated transmission.

Optionally, the processor 810 is configured to:

wherein the processor 810 is configured to:

performing a transmission of Msg3 using the dedicated DMRS sequence.

Optionally, in a case that the Msg3 is scheduled to be transmitted repeatedly and the network side device supports Msg3 repeated transmission, the scheduling information includes a dedicated DMRS parameter of the Msg3 repeated transmission.

wherein the processor 810 is configured to:

msg3 based on repeated transmissionCorresponding initialization parameter c _init Generating a dedicated DMRS sequence repeatedly transmitted by Msg 3; and/or a dedicated initialization parameter c based on the Msg3 repeated transmission _init The specific DMRS sequence repeatedly transmitted by the Msg3 is generated.

wherein the processor 810 is configured to:

first parameter w corresponding to Msg3 based on repeated transmission _f (k') and/or a second parameter Δ, map the Msg3 repeated transmissions of the dedicated DMRS sequence.

wherein the processor 810 is configured to:

Optionally, the processor 810 is configured to:

An embodiment of the present application further provides a network-side device, which includes a processor and a communication interface, where the communication interface is configured to:

a receiving terminal transmits Msg3 based on the scheduling information, wherein the Msg3 carries additional information;

the processor is configured to:

completing random access based on the Msg3 carrying the additional information;

wherein the additional information is used to indicate at least one of:

the number of retransmissions of the Msg3 transmission.

The embodiment of the network side device corresponds to the embodiment of the method of the network side device, and all implementation processes and implementation manners of the embodiment of the method can be applied to the embodiment of the network side device and can achieve the same technical effect.

Specifically, the embodiment of the application further provides a network side device. Fig. 9 is a schematic diagram of a hardware structure of a network device for implementing an embodiment of the present application, and as shown in fig. 9, the network device 900 includes: antenna 901, radio frequency device 902, baseband device 903. The antenna 901 is connected to a radio frequency device 902. In the uplink direction, rf device 902 receives information via antenna 901 and sends the received information to baseband device 903 for processing. In the downlink direction, the baseband device 903 processes information to be transmitted and transmits the processed information to the radio frequency device 902, and the radio frequency device 902 processes the received information and transmits the processed information through the antenna 901.

The above-mentioned frequency band processing means may be located in the baseband apparatus 903, and the method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 903, where the baseband apparatus 903 includes a processor 904 and a memory 905.

The baseband device 903 may include at least one baseband board, for example, a plurality of chips are disposed on the baseband board, as shown in fig. 9, where one of the chips, for example, the processor 904, is connected to the memory 905 to call up a program in the memory 905 to perform the network device operations shown in the above method embodiments.

The baseband device 903 may further include a network interface 906 for exchanging information with the radio frequency device 902, for example, a Common Public Radio Interface (CPRI).

Specifically, the network side device according to the embodiment of the present invention further includes: the instructions or programs stored in the memory 905 and capable of being executed on the processor 904, and the processor 904 calls the instructions or programs in the memory 905 to execute the method executed by each module shown in fig. 5, and achieve the same technical effect, which is not described herein for avoiding repetition.

Wherein the processor 904 is configured to:

completing random access based on the Msg3 carrying the additional information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

Optionally, the processor 904 is configured to:

wherein the decoding form comprises: a single decoded version that decodes Msg3 for a single transmission, and a repeated decoded version that decodes Msg3 for a repeated transmission.

Optionally, the processor 904 is configured to:

in the case that the network side device determines to schedule the Msg3 repeat transmission, the scheduling information includes the Msg2 and DCI scrambled by the special RNTI of the Msg3 repeat transmission.

Optionally, processor 904 is configured to:

the network side device blindly detects the Msg3 transmitted for the first time, and determines at least one of the following indicated by the additional information:

the number of repeated transmissions of the Msg3 transmission.

Optionally, the processor 904 is configured to:

and in the case that the special DMRS is detected, determining that the terminal supports the Msg3 repeated transmission or the Msg3 is the Msg3 of the repeated transmission.

processor 904 is configured to:

Optionally, the processor 904 is configured to:

Optionally, processor 904 is configured to:

Optionally, the processor 904 is configured to:

Optionally, processor 904 is configured to perform at least one of:

when the network side equipment schedules the Msg3 repeated transmission through the scheduling information, the decoding is unsuccessful in the repeated decoding mode, and the terminal is determined to support the Msg3 repeated transmission or the Msg3 is determined to be the Msg3 of the repeated transmission, the Msg3 repeated transmission is scheduled again;

and under the condition that the network side equipment schedules the Msg3 single transmission through the scheduling information, the decoding is unsuccessful in the repeated decoding mode, and the terminal is determined to support the Msg3 repeated transmission or the Msg3 is determined to be the Msg3 of the repeated transmission, the Msg3 repeated transmission is scheduled again.

Optionally, processor 904 is configured to:

Optionally, the processor 904 is configured to perform at least one of:

determining that the terminal supports the Msg3 duplicate transmission or that the Msg3 is the Msg3 of the duplicate transmission when a duplicate decoding scheme is used, but in the event that the decoding fails, continuing to detect a subsequent Msg 3;

Optionally, the processor 904 is configured to:

after the continuing detection of the subsequent Msg3, the Msg3 is scheduled for repeated transmission using the dedicated RNTI scrambled DCI of the Msg3 repeated transmission in case of detection until the last Msg3 still fails decoding.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing embodiment of the random access method, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the foregoing random access method embodiment, and can achieve the same technical effect, and for avoiding repetition, details are not repeated here.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

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 identified by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer 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 application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.

Claims

1. A random access method, comprising:

wherein the additional information is used to indicate at least one of:

the number of retransmissions of the Msg3 transmission.

2. The random access method according to claim 1, wherein the terminal transmits Msg3 carrying additional information based on the scheduling information, comprising:

the terminal determines that the Msg3 is scheduled to be single transmission based on the scheduling information, and determines that the network-side device supports Msg3 repeated transmission and the terminal supports Msg3 repeated transmission based on the scheduling information and/or the system information.

3. The random access method according to claim 2, wherein the terminal determines that Msg3 is scheduled for repeated transmission based on the scheduling information, and the method comprises:

4. The random access method according to claim 2, wherein the terminal determines that the network-side device supports Msg3 retransmission based on the scheduling information and/or the system information, and includes:

determining that the network side equipment supports Msg3 repeated transmission based on the system information; wherein the system information is used for indicating that the network side equipment supports the Msg3 repeated transmission.

5. The random access method according to any of claims 2-4, wherein the additional information comprises a dedicated DMRS sequence repeatedly transmitted by Msg 3;

performing a transmission of Msg3 using the dedicated DMRS sequence.

6. The random access method of claim 5, wherein in a case that the Msg3 is scheduled for repeated transmission and a network side device supports Msg3 repeated transmission, the scheduling information comprises a dedicated DMRS parameter for the Msg3 repeated transmission.

7. The random access method of claim 6, wherein the DMRS-specific parameters comprise parameters of a sequence generation function and/or parameters of a DMRS resource mapping.

8. The random access method according to claim 7, wherein the parameters of the sequence generating function comprise an initialization parameter c _init Input values and/or initialization parameters c _init The calculation method of (1);

initialization parameter c corresponding to Msg3 based on repeated transmission _init Generating a dedicated DMRS sequence repeatedly transmitted by Msg 3; and/or, a dedicated initialization parameter c based on the Msg3 repetitive transmission _init The method of calculating (3) generates a dedicated DMRS sequence repeatedly transmitted by Msg 3.

9. The random access method of claim 7, wherein the parameters of the DMRS resource mapping comprise a first parameter w _f (k') and a second parameter Δ;

10. The random access method according to claim 7, wherein the parameter of the sequence generating function comprises a first parameter α and/or a sequence group number u;

11. The random access method according to claim 10, wherein the first parameter α is used to indicate a number of repeated transmissions of the Msg3 transmission.

12. The random access method according to any of claims 2-4, wherein the additional information is carried on the first uplink control information, UCI.

13. The random access method according to any of claims 2-4, wherein the terminal transmits the Msg3 carrying additional information based on the scheduling information, comprising:

14. The random access method according to claim 13, wherein the receiving the scheduling information of the network side includes:

15. The random access method of claim 14, wherein the Msg3 repeatedly transmitted dedicated RNTI scrambled DCI is detected by the terminal in the Msg3 repeatedly transmitted dedicated search space or the Msg3 repeatedly transmitted dedicated CORESET.

16. The random access method according to any one of claims 2-4, wherein the terminal transmits the Msg3 carrying additional information based on the scheduling information, comprising:

17. The random access method according to any of claims 1-4, wherein the scheduling information of the receiving network side includes any of the following:

18. The random access method of claim 1, further comprising:

the terminal determines that the Msg3 is scheduled for repeated transmission based on the scheduling information and the terminal does not support Msg3 repeated transmission;

the terminal determines that the Msg3 is scheduled to be single transmission based on the scheduling information, and determines that the network-side device supports Msg3 repeated transmission based on the scheduling information and/or the system information;

19. A random access method, comprising:

the network side equipment receives the Msg3 transmitted by the terminal based on the scheduling information, wherein the Msg3 carries additional information;

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

20. The random access method according to claim 19, wherein the network side device completes random access based on the Msg3 carrying the additional information, and includes:

21. The random access method of claim 19, wherein the network side device sends scheduling information, and the method comprises:

22. The random access method according to claim 21, wherein the network side device completes random access based on the Msg3, and comprises:

the number of retransmissions of the Msg3 transmission.

23. The random access method of claim 22, wherein in the case that the network-side device determines to schedule the Msg3 duplicate transmission, the scheduling information comprises DMRS parameters specific to the Msg3 duplicate transmission.

24. The random access method according to claim 23, wherein the blind detection by the network-side device of the Msg3 transmitted for the first time includes:

25. The random access method of claim 23, wherein the additional information is carried on first uplink control information, UCI;

26. The random access method according to claim 23, wherein the blind detection by the network-side device of the Msg3 transmitted for the first time includes:

27. The random access method according to claim 23, wherein the blind detection by the network-side device of the Msg3 transmitted for the first time includes:

28. The random access method of claim 23, wherein the network side device sends scheduling information, and the method comprises:

29. The random access method according to claim 23, wherein the blind detection by the network-side device of the Msg3 transmitted for the first time includes:

in the case that it is determined that the terminal performs the transmission of the Msg3 based on the dedicated search space of the Msg3 repeat transmission or the DCI scrambled by the dedicated RNTI in the dedicated CORESET, it is determined that the terminal supports the Msg3 repeat transmission or that the Msg3 is the Msg3 of the repeat transmission.

30. The random access method according to any of claims 24-29, wherein the network side device completes random access based on the Msg3, and comprises at least one of:

31. The random access method of claim 30, wherein the scheduling Msg3 to repeat transmission comprises:

32. The random access method according to claim 30, wherein the network side device completes random access based on the Msg3, and comprises at least one of:

33. The random access method according to claim 32, further comprising, after the continuing to detect the subsequent Msg 3:

34. A random access apparatus, comprising:

wherein the additional information is used to indicate at least one of:

the number of retransmissions of the Msg3 transmission.

35. The random access device of claim 34, wherein the first transmission module is further configured to:

the terminal determines that the Msg3 is scheduled for repeated transmission based on the scheduling information and the terminal supports Msg3 repeated transmission;

36. The random access apparatus of claim 35, wherein the first transmission module is configured to:

37. The random access apparatus of claim 35, wherein the first transmission module is configured to:

determining that the Msg3 is scheduled to be transmitted repeatedly based on the scheduling information, and determining that the network side equipment supports Msg3 repeated transmission;

38. The random access device of any of claims 35-37, wherein the additional information comprises a dedicated DMRS sequence that is repeatedly transmitted by Msg 3;

wherein the first transmission module is configured to:

performing a transmission of Msg3 using the dedicated DMRS sequence.

39. The random access apparatus of any of claims 35-37, wherein the additional information is carried on the first uplink control information, UCI.

40. The random access device of any one of claims 35-37, wherein the first transmission module is configured to:

41. The random access device of any one of claims 35-37, wherein the first transmission module is configured to:

and under the condition that the terminal determines to report the additional information, determining the special time domain resource of the Msg3 based on the special time domain resource configuration of the Msg3 repeated transmission, and executing the Msg3 repeated transmission.

42. A random access apparatus, comprising:

wherein the additional information is used to indicate at least one of:

the number of repeated transmissions of the Msg3 transmission.

43. The random access apparatus of claim 42, wherein the random access module is configured to:

44. The random access apparatus of claim 42, wherein the first sending module is configured to:

45. The random access apparatus of claim 44, wherein the random access module is configured to:

the number of repeated transmissions of the Msg3 transmission.

46. A terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the random access method of any one of claims 1 to 18.

47. A network side device comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the random access method according to any one of claims 19 to 33.

48. A readable storage medium, characterized in that a program or instructions are stored thereon, which program or instructions, when executed by a processor, carry out the steps of the random access method according to any one of claims 1 to 18, or carry out the steps of the random access method according to any one of claims 19 to 33.