CN111050412B

CN111050412B - Random access method and device thereof

Info

Publication number: CN111050412B
Application number: CN201811189426.0A
Authority: CN
Inventors: 邵华; 黄煌; 颜矛; 高宽栋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-10-12
Filing date: 2018-10-12
Publication date: 2022-11-25
Anticipated expiration: 2038-10-12
Also published as: CN111050412A

Abstract

The application relates to the field of wireless communication, and discloses a random access method and a device thereof, which are used for terminal equipment to distinguish which random access mode is used for random access network. The method comprises the following steps: the terminal equipment sends a message 1 in the random access process to the network equipment; the terminal equipment receives a message 2 in the random access process sent by the network equipment according to the message 1; the message 2 includes first indication information, where the first indication information is used to indicate a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, and the indication information corresponding to each random access mode is different. The terminal equipment distinguishes the message 2 sent by the network equipment by adopting which random access mode through the first indication information included in the message 2, thereby distinguishing which random access mode is adopted by the terminal equipment to randomly access the network.

Description

Random access method and device thereof

Technical Field

The embodiment of the application relates to the field of wireless communication, in particular to a random access method and a device thereof.

Background

In a wireless communication system, in order for a terminal device to establish a connection with a network and to request the network to allocate a dedicated resource to the terminal device, and perform normal service transmission, the terminal device first needs to perform random access to the network.

Currently, in a protocol of a Long Term Evolution (LTE) of a fourth generation mobile communication system and a New Radio (NR) of a fifth generation mobile communication system, a four-step Random Access Channel (RACH) procedure is specified, which may be abbreviated as: 4-step RACH, comprising the following 4 steps:

step 1: the terminal equipment sends a message 1 to the network equipment, wherein the message 1 comprises a random access preamble (random access preamble); step 2: the network device feeds back a message 2 according to the received random access preamble, wherein the message 2 includes a Random Access Response (RAR), and the RAR includes a time-frequency resource allocated for the terminal device and used for sending a message 3; and step 3: the terminal equipment sends a message 3 on a time-frequency resource configured in the random access response of the message 2, wherein the message 3 comprises random access data, and the random access data is used for enabling the network equipment to judge whether the terminal equipment is successfully accessed randomly; and 4, step 4: the network equipment identifies whether the terminal equipment is successfully accessed randomly according to the random access data, and feeds back a message 4 to the terminal equipment after the random access is successful, wherein the message is used for indicating the terminal equipment to finish the random access process.

Of course, the protocol currently or in the future may also make new random access schemes different from the above-mentioned 4-step RACH scheme, so that in the case of multiple random access schemes simultaneously existing, how the terminal device distinguishes which random access scheme is used for random access to the network is not explicitly specified in the protocol at present.

Disclosure of Invention

The embodiment of the application provides a random access method and a device thereof, which are used for terminal equipment to distinguish which random access mode is used for randomly accessing a network.

In a first aspect, a random access method is provided, where a terminal device sends a message 1 in a random access process to a network device, and the network device receives the message 1 in the random access process sent by the terminal device; after receiving the message 1, the network device may generate a message 2 in a random access process according to the message 1, and add first indication information in the message 2, where the first indication information is used to indicate a random access mode adopted when the network device sends the message 2, and the network device supports at least two random access modes, where indication information corresponding to each random access mode is different; and the network equipment sends a message 2 in the random access process to the terminal equipment, and the terminal equipment receives the message 2 in the random access process sent by the network equipment according to the message 1 and determines which random access mode is adopted by the network equipment to send according to the first indication information in the message 2.

By adding the first indication information in the message 2, the message 2 sent by the network device in which random access mode is adopted is distinguished, so that the terminal device can be distinguished from which random access mode is adopted to access the network specifically.

In a possible implementation, the message 2 includes downlink control information, and the first indication information may be located in a preset field in the downlink control information; of course, a new field may be added to the predetermined position of the downlink control information, and the first indication information is located in the newly added field.

In one possible implementation, the random access response is included in message 2; the first indication information is located in a preset field in a subheader of a preset sub-protocol data unit in the random access response in the message 2, or located in a preset field in a reserved field of the random access response.

In one possible implementation, the random access modes supported by the network device may include a two-step random access mode and a four-step random access mode; the terminal device may send the message 1 in a two-step random access manner, the network device may also reply to the message 2 in a two-step random access manner after receiving the message 1, if the network device does not receive the complete message 1 and cannot reply to the message 2 in a two-step random access manner, the network device may drop to send the message 2 in a four-step random access manner, in order to distinguish whether the message falls, the network device may include second indication information in the message 2, where the second indication information is used to indicate that the network device sends the message 2 in a two-step random access manner after dropping to the four-step random access manner.

In a second aspect, a random access method is provided, in which a terminal device sends a message 1 in a random access process to a network device, and the network device receives the message 1 in the random access process sent by the terminal device; after receiving the message 1, the network device may generate a message 2 in a random access process according to the message 1, and when sending the message 2, the network device sends the message 2 by using a time-frequency resource corresponding to a random access mode, where the time-frequency resource occupied by the message 2 is used to indicate the random access mode used when the network device sends the message 2; the network equipment supports at least two random access modes, and the time frequency resources used when the network equipment sends the message 2 based on each random access mode are different. After the terminal device receives the message 2 in the random access process sent by the network device according to the message 1, the terminal device may determine which random access mode to send the message 2 according to the time-frequency resource for receiving the message 2.

The message 2 sent by the network device in which random access mode is adopted is distinguished through the time-frequency resource occupied by the message 2, so that the terminal device can be distinguished from the network which is randomly accessed in which random access mode is adopted.

In a possible implementation, the network device may send configuration information to the terminal in advance, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

In one possible implementation, the time-frequency resources may be different time-domain resources and/or different frequency-domain resources. The time domain resources may be different in that the time windows are not overlapped, or may be the same in that the time windows occupy different time positions.

In a third aspect, a random access method is provided, in which a terminal device sends a message 1 in a random access process to a network device, and the network device receives the message 1 in the random access process sent by the terminal device; after receiving the message 1, the network device may generate a message 2 in a random access process according to the message 1, and when sending the message 2, scramble the message 2 by using a scrambling code corresponding to a random access mode, where the scrambling code used in the message 2 is used to indicate the random access mode used when the network device sends the message 2; the network equipment supports at least two random access modes, and the scrambling codes corresponding to each random access mode are different; the terminal device receives the message 2 in the random access process sent by the network device according to the message 1, and can determine which random access mode the network device specifically sends the message 2 according to the scrambling code of the message 2.

The message 2 sent by the network device in which random access mode is adopted is distinguished through the scrambling code adopted by the message 2, so that the terminal device in which random access mode is adopted can also be distinguished.

In a possible implementation manner, the scrambling code may be any one of a random access radio network temporary identifier RA-RNTI, a cell radio network temporary identifier C-RNTI, and a system message cell radio network temporary identifier SI-RNTI.

In one possible implementation, the scrambling code may be related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1; or the scrambling code may be determined according to different index values indicating different random access manners.

In one possible implementation, if the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1, the scrambling code may be determined using the following formula:

scrambling code =1+ s \ u id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id;

wherein s _ id represents the starting symbol of preamble of random access preamble, t _ id represents the starting slot of preamble, f _ id represents the index of preamble in frequency domain, and ul _ carrier _ id represents the carrier index of the carrier sending preamble.

In one possible implementation, if the scrambling code is determined according to different index values indicating different random access manners, the following formula may be used to determine the scrambling code:

scrambling code =1+ RACH _ \ type +2s _id +2 +14 × 80 × f _ id +2 +14 × 80 × 8 × ul _ carrier _ id; or

Scrambling code =1+ s \ u id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id +2 × 80 × 8 × 2 × RACH _ type;

wherein s _ id represents a starting symbol for transmitting a preamble, t _ id represents a starting slot for transmitting the preamble, f _ id represents an index of the preamble on a frequency domain, ul _ carrier _ id represents a carrier index of a carrier for transmitting the preamble, and RACH _ type represents an index value of a random access type used, for example, when a network device uses a two-step random access mode 2-step RACH to transmit a message 2, RACH _ type =0, and when the network device uses a four-step random access mode 2-step RACH to transmit a message 2, RACH _ type =1.

In a fourth aspect, there is provided a random access apparatus having functionality to implement the method in any one of the possible implementations of the above aspects and aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible implementation, the apparatus may be a chip or an integrated circuit.

In one possible implementation, the apparatus includes a transceiver and a processor, the processor is configured to execute a set of programs, and when the programs are executed, the apparatus may perform sending a message 1 in a random access procedure to a network device through the transceiver; receiving a message 2 in the random access process sent by the network equipment according to the message 1 through a transceiver; the message 2 includes first indication information, where the first indication information is used to indicate a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, and the indication information corresponding to each random access mode is different.

In one possible implementation, the apparatus further includes a memory for storing a program for execution by the processor.

In one possible implementation, the apparatus includes a transceiving unit and a processing unit;

the processing unit is used for generating a message 1 in a random access process;

the receiving and sending unit is used for sending a message 1 in the random access process to the network equipment; receiving a message 2 in the random access process sent by the network equipment according to the message 1; the message 2 includes first indication information, where the first indication information is used to indicate a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, and the indication information corresponding to each random access mode is different.

In one possible implementation, the apparatus may be a terminal device.

In a fifth aspect, a random access apparatus is provided having the functionality to implement the method in any one of the possible implementations of the above aspects and aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible implementation, the apparatus includes a transceiver and a processor, the processor is configured to execute a set of programs, and when the programs are executed, the apparatus may perform receiving, by the transceiver, a message 1 in a random access procedure transmitted by a terminal device; and according to the message 1, sending a message 2 in the random access process to the terminal equipment through a transceiver; the message 2 includes first indication information, where the first indication information is used to indicate a random access mode adopted when the device sends the message 2; the device supports at least two random access modes, and the indication information corresponding to each random access mode is different.

In one possible implementation, the apparatus includes a transceiver unit and a processing unit;

the receiving and sending unit is used for receiving a message 1 sent by the terminal equipment in the random access process;

the processing unit is used for generating a message 2 in the random access process;

the receiving and sending unit is further configured to send a message 2 in a random access process to the terminal device through the transceiver according to the message 1; the message 2 includes first indication information, where the first indication information is used to indicate a random access mode adopted when the device sends the message 2; the device supports at least two random access modes, and the indication information corresponding to each random access mode is different.

In one possible implementation, the apparatus may be a network device.

A sixth aspect provides a random access apparatus having functionality to implement the method in any one of the possible implementations of the above aspects and aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible implementation, the apparatus includes a transceiver and a processor, the processor is configured to execute a set of programs, and when the programs are executed, the apparatus may perform sending a message 1 in a random access procedure to a network device through the transceiver; receiving a message 2 in a random access process sent by network equipment according to the message 1 through a transceiver, wherein a time-frequency resource occupied by the message 2 is used for indicating a random access mode adopted when the network equipment sends the message 2; the network equipment supports at least two random access modes, and the time frequency resources used when the network equipment sends the message 2 based on each random access mode are different.

In one possible implementation, the apparatus may be a terminal device.

In a possible implementation, the processor may be further configured to receive, through the transceiver, configuration information sent by the network device, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

In one possible implementation, the apparatus includes: a transceiving unit and a processing unit;

the processing unit is used for generating a message 1 in the random access process;

the receiving and sending unit is used for sending a message 1 in the random access process to the network equipment; receiving a message 2 in a random access process sent by network equipment according to the message 1, wherein a time-frequency resource occupied by the message 2 is used for indicating a random access mode adopted when the network equipment sends the message 2; the network equipment supports at least two random access modes, and the time frequency resources used when the network equipment sends the message 2 based on each random access mode are different.

In a possible implementation, the processing unit may be further configured to receive configuration information sent by the network device, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

In a seventh aspect, a random access apparatus is provided that has the functionality to implement the method in any one of the possible implementations of the above aspects and aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible implementation, the apparatus includes a transceiver and a processor, the processor is configured to execute a set of programs, and when the programs are executed, the apparatus may perform receiving, by the transceiver, a message 1 in a random access procedure transmitted by a terminal device; sending a message 2 in a random access process to the terminal equipment through a transceiver according to the message 1, wherein a time-frequency resource occupied by the message 2 is used for indicating a random access mode adopted when the device sends the message 2; the device supports at least two random access modes, and the time frequency resources used by the device when the device sends the message 2 based on each random access mode are different.

In one possible implementation, the apparatus may be a network device.

In a possible implementation, the processor is further configured to send configuration information to the terminal through the transceiver, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

the transceiver unit is further configured to send a message 2 in a random access process to the terminal device through the transceiver according to the message 1, where a time-frequency resource occupied by the message 2 is used to indicate a random access mode adopted when the device sends the message 2; the device supports at least two random access modes, and the time frequency resources used by the device when the device sends the message 2 based on each random access mode are different.

In a possible implementation, the processing unit is further configured to send configuration information to the terminal, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

In an eighth aspect, a random access apparatus is provided that has the functionality to implement the method in any of the possible implementations of the above aspects and aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible implementation, the apparatus includes a transceiver and a processor, the processor is configured to execute a set of programs, and when the programs are executed, the apparatus may perform sending a message 1 in a random access procedure to a network device through the transceiver; receiving a message 2 in a random access process sent by network equipment according to the message 1 through a transceiver, wherein a scrambling code adopted by the message 2 is used for indicating a random access mode adopted when the network equipment sends the message 2; the network equipment supports at least two random access modes, and the scrambling codes corresponding to each random access mode are different.

the receiving and sending unit is used for sending a message 1 in the random access process to the network equipment; receiving a message 2 in a random access process sent by the network equipment according to the message 1, wherein a scrambling code adopted by the message 2 is used for indicating a random access mode adopted when the network equipment sends the message 2; the network equipment supports at least two random access modes, and the scrambling codes corresponding to each random access mode are different.

In one possible implementation, the apparatus may be a terminal device.

In a ninth aspect, there is provided a random access apparatus having functionality to implement the method in any one of the possible implementations of the above aspects and aspects. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible implementation, the apparatus includes a transceiver and a processor, the processor is configured to execute a set of programs, and when the programs are executed, the apparatus may perform receiving, by the transceiver, a message 1 in a random access procedure transmitted by a terminal device; sending a message 2 in a random access process to the terminal equipment through a transceiver according to the message 1, wherein a scrambling code adopted by the message 2 is used for indicating a random access mode adopted when the device sends the message 2; the device supports at least two random access modes, and the scrambling codes corresponding to each random access mode are different.

the transceiver unit is further configured to send a message 2 in a random access process to the terminal device through the transceiver according to the message 1, where a scrambling code used in the message 2 is used to indicate a random access manner used when the network device sends the message 2; the device supports at least two random access modes, and the scrambling codes corresponding to each random access mode are different.

In one possible implementation, the apparatus may be a network device.

In a tenth aspect, a computer-readable storage medium is provided, having computer-readable instructions stored therein, which, when read and executed by a computer, cause the computer to perform the method described in any of the possible implementations of the above aspects and aspects.

In an eleventh aspect, there is provided a computer program product which, when read and executed by a computer, causes the computer to perform the method described in the above aspects and any possible implementation of the aspects.

In a twelfth aspect, a chip is provided, which is coupled with a memory for reading and executing a software program stored in the memory to implement the method described in the above aspects and any possible implementation of the aspects.

Drawings

Fig. 1 is a diagram illustrating a structure of a random access system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a four-step random access method in an embodiment of the present application;

fig. 3 is a schematic diagram of a two-step random access method in an embodiment of the present application;

fig. 4 is a diagram illustrating a random access scheme in an embodiment of the present application;

fig. 5 is a diagram illustrating a random access scheme in an embodiment of the present application;

fig. 6 is a diagram illustrating a random access scheme in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a random access apparatus in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a random access device in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a random access apparatus in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a random access device in an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: long Term Evolution (LTE) systems, worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth generation (5 th generation, 5g) systems, such as new radio access technology (NR), and future communication systems, such as 6G systems, etc.

In addition, in the embodiments of the present application, the word "exemplary" is used to mean serving as an example, instance, or illustration. Any embodiment or implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or implementations. Rather, the term using examples is intended to present concepts in a concrete fashion.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

For the convenience of understanding the embodiments of the present application, first, the random access system shown in fig. 1 is taken as an example, and the random access system applied to the embodiments of the present application is described in detail. Fig. 1 shows a schematic diagram of a random access system suitable for the random access method in the embodiment of the present application. As shown in fig. 1, the random access system 100 includes a terminal apparatus 101 and a network apparatus 102. The terminal apparatus 101 accesses the network apparatus 102 through a random access procedure.

In a wireless communication system, in order for a terminal device to establish a connection with a network device and request the network device to allocate a corresponding dedicated resource to the terminal device, normal service transmission is performed, and generally, the terminal device first needs to perform random access to the network device. The scenario in which the terminal device triggers the random access includes any one of the following scenarios:

scenario 1, a terminal device initiates Radio Resource Control (RRC) connection establishment, and when the terminal device changes from an idle state to a connected state, the terminal device initiates random access.

And in a scene 2, the RRC connection of the terminal equipment is reestablished, and when the RRC connection of the terminal equipment needs to be reestablished after the radio connection fails, the terminal equipment can initiate random access.

And 3, when the terminal equipment carries out cell switching, the terminal equipment initiates random access in a target cell.

And 4, when the terminal equipment is in a connected state, the network equipment has downlink data to be transmitted to the terminal equipment, but finds that the terminal equipment is out of step in an uplink mode, the network equipment controls the terminal equipment to initiate random access, wherein the network equipment maintains an uplink timer, and if the uplink timer is overtime and the network equipment does not receive a response signal of the terminal equipment, the network equipment considers that the terminal equipment is out of step in the uplink mode.

And 5, when the terminal equipment is in a connection state, the terminal equipment has uplink data to be transmitted to the network equipment, but finds that the terminal equipment is in an uplink out-of-step state, the terminal equipment initiates random access, wherein the terminal equipment maintains an uplink timer, and if the uplink timer is overtime and the terminal equipment does not receive a TA (timing advance) value adjusting command of the network equipment, the terminal equipment considers that the uplink is out of step.

Some terms of the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

1) The network device has a device capable of providing a random access function for the terminal device or a chip that can be set in the device, and the device includes but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, nodeB, or home Node B, HNB), a Base Band Unit (BBU), a wireless fidelity (WIFI) system, and the like, and may also be 5G, such as NR, a gbb in the system, or a transmission point (TRP or TP), a set (including multiple antennas) of a base station in the 5G system, or a panel (including multiple antennas) of a base station in the 5G system, or a distributed Node B, such as a base band unit (NB), a base transceiver station (BBU), and the like.

2) A terminal device, also referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user. For example, the terminal device includes a handheld device, an in-vehicle device, and the like having a wireless connection function. Currently, the terminal device may be: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.

3) Scrambling, multiplying the spread spectrum code by a pseudo random code sequence, and encrypting the signal, wherein the pseudo random code sequence can be understood as the scrambling code of the application, and the scrambling code can be used for scrambling and descrambling. Further, scrambling Downlink Control Information (DCI) or a Physical Downlink Control Channel (PDCCH) may indicate scrambling a CRC field of the DCI. Accordingly, the terminal device descrambles the PDCCH, which means that the CRC field is descrambled using a Radio Network Temporary Identity (RNTI) of a corresponding type to determine a format or a type of the DCI, and the like.

4) "and/or" in the present application describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The plural in the present application means two or more.

In addition, it is to be understood that the terms first, second, etc. in the description of the present application are used for distinguishing between the descriptions and not necessarily for describing a sequential or chronological order.

In addition, it should be noted that the two-step random access method and the two-step random access process in the present application have the same meaning, and in the same way, the four-step random access method and the four-step random access process have the same meaning.

In the embodiment of the present application, a network device may support multiple random access manners, and a brief description is provided below of a four-step random access manner (4-step RACH) and a two-step random access manner (2-step RACH) that are currently supported by both a terminal device and a network device, and as communication technologies develop, more other random access manners may appear in the future, and the multiple random access manners described herein may be included.

For example, the network device supports a four-step random access scheme (4-step RACH) as shown in fig. 2: before the terminal equipment is randomly accessed, the network equipment configures a preamble set available for the network equipment and a time-frequency resource for sending the message 1 for the terminal equipment. The random access of the terminal equipment comprises the following 4 steps:

step 1: the terminal device sends a message 1 on a pre-configured time frequency resource, wherein the message 1 includes a Random access preamble (Random access preamble), and the Random access preamble includes any preamble selected by the terminal device in a preamble set configured by the network device.

And 2, step: the network device sends a message 2 according to the message 1, where the message 2 includes Downlink Control Information (DCI) and a Random Access Response (RAR), and the terminal device demodulates the RAR information according to the DCI. The RAR includes a random access preamble, a time-frequency location where the message 3 is sent, a Temporary Cell radio network Temporary identifier (TC-RNTI), and the like. The network device demodulates the lead code sent by the terminal device, calculates the scrambling code of the message 2 according to the identifier of the demodulated lead code and the time frequency resource of the received message 1, wherein the scrambling code can be a random access radio network temporary identifier (RA-RNTI), the network device determines the time frequency resource of the message 3 sent by the terminal device according to the analyzed lead code, carries the identifier of the lead code and the time frequency resource of the sent message 3 in the message 2, and sends the message 2 to the terminal device in a broadcast mode after scrambling the message 2 by adopting the calculated scrambling code.

And step 3: the method includes that a terminal device receives a message 2 broadcasted by a network device, calculates a scrambling code of the message 2 in the same manner as the scrambling code calculated by the network device, and descrambles the message 2 sent by the network device, if the terminal device analyzes an identifier of a preamble sent by the terminal device in the message 2, the terminal device considers that the preamble sent by the terminal device is received by the network device, the terminal device can send a message 3 to the network device on a time-frequency resource configured in the message 2, the message 3 includes random access data, the random access data includes an identifier (UE-ID) of the terminal device and identifiers of different scene information, for example, for a scene in which RRC connection reconstruction is performed for the terminal device, and the identifier of corresponding scene information is a cell radio network temporary identifier (C-RNTI).

And 4, step 4: because a plurality of terminal devices send messages 3 on the same time-frequency resource, interference can be generated, the network device demodulates the message 3 sent by one of the terminal devices, and sends a message 4 to the terminal device in a broadcasting mode, the message 4 comprises the identifier of the demodulated terminal device, and the message 4 is used for indicating the terminal device which completes the random access process.

All the terminal devices sending the message 3 wait for the message 4, the terminal devices analyze the received message 4, the identifier of the terminal device in the message 4 is matched with the identifier of the terminal device, and the successfully matched terminal device is the successfully randomly accessed terminal device.

If the network device does not receive the random access preamble in the message 1 sent by the terminal device, the message 2 sent by the network device does not have a preamble corresponding to the terminal device, and the terminal device does not receive the message 2 corresponding to itself fed back by the network device in a preset time window, the random access preamble in the message 1 may be resent.

If the network device does not receive the random access data in the message 3 sent by the terminal device, the message 4 sent by the network device does not have an identifier corresponding to the terminal device, and the terminal device does not receive the message 4 corresponding to itself fed back by the network device in a preset time window, the random access data in the message 3 can be sent again.

Illustratively, the network device supports a two-step random access scheme (2-step RACH) as shown in fig. 3: before the terminal equipment is randomly accessed, the network equipment configures a preamble set available for the network equipment and a time-frequency resource for sending the message 1 for the terminal equipment. The terminal equipment comprises the following steps when carrying out random access:

step 1: the method comprises the steps that terminal equipment sends a message 1 on a pre-configured time frequency resource, wherein the message 1 comprises a random access preamble and random access data, and the random access preamble comprises any preamble selected by the terminal in a preamble set configured by network equipment; the random access data comprises an identity UE-ID of the terminal device and an identity of the different context information.

And 2, step: the network equipment receives the message 1 sent by the terminal equipment, if the network equipment successfully receives the random access preamble and the random access data, the network equipment can demodulate the preamble sent by the terminal equipment, calculate the scrambling code of the message 2 according to the identifier of the demodulated preamble and the time-frequency resource of the received message 1, demodulate the identifier of the terminal equipment by the network equipment, carry the identifier of the demodulated terminal equipment in the message 2, scramble the message 2 by adopting the calculated scrambling code, and then send the message to the terminal equipment in a broadcasting mode.

In the above two-step random access procedure (2-step RACH), the terminal device combines the message 1 and the message 3 in the 4-step RACH into one message and sends the message to the network device; the network device combines the message 2 and the message 4 in the 4-step RACH into a message and responds to the terminal device at the same time, and the message is used for indicating whether the random access of the terminal device is successful.

In the 2-step RACH, due to orthogonality between preambles of different preambles, on the premise that the terminal device randomly selects the Preamble for transmission, the probability of failure in transmitting the Preamble is much smaller than the probability of failure in transmitting data. When the network device successfully receives the random access preamble and does not receive the random access data, the 2-step RACH can be dropped to the 4-step RACH, namely, the network device returns a message 2 in the 4-step RACH according to the preamble successfully received, the message 2 does not include the identifier of the terminal device, and the time-frequency resource for sending the message 3 is distributed in the message 2, so that the terminal device sends the random access data again.

After receiving the message 2 sent by the network device, the terminal device calculates the scrambling code of the message 2 according to the same method as the method for calculating the scrambling code by the network device, and descrambles the message 2 sent by the network device, if the terminal device only analyzes the identifier of the preamble sent by the terminal device in the message 2 and does not analyze the identifier of the terminal device matched with the identifier of the terminal device, the terminal device considers that the network device only successfully receives the random access preamble in the message 1 and does not successfully receive the random access data in the message 1, and the terminal device can resend the random access data to the network device on the time-frequency resource configured in the message 2. And after receiving the message 3 sent by the terminal equipment, the subsequent network equipment feeds back the message 4 in the 4-step RACH.

If the terminal device does not receive the message 2 sent to itself by the network device, it can be considered that the network device does not receive the random access preamble and the random access data, and the terminal device can resend the message 1, that is, resend the random access preamble and the random access data.

If the network device supports multiple random access manners, the network device may transmit the message 2 by using multiple random access manners, for example, the message 2 may be transmitted by using the 4-step RACH, the message 2 may be transmitted by using the 2-step RACH, or the message 1 may be initially received by using the 2-step RACH and then the message 2 is transmitted after falling back to the 4-step RACH from the 2-step RACH.

In another possible implementation manner, the terminal device sends the message 1 in a two-step random access manner, where the message 1 includes a random access preamble and random access data, and if the network device receives only the random access preamble in the message 1, the network device may send the message 2 after falling from the 2-step RACH to the 4-step RACH, in order to distinguish whether the network device sends the message 2 in the 4-step RACH or sends the message 2 after falling from the 2-step RACH to the 4-step RACH, the network device may also carry, in addition to the first indication information, second indication information in the message 2, where the second indication information is used to indicate the message 2 sent after falling from the 2-step RACH to the 4-step RACH.

In order to distinguish which random access mode is adopted by the network device to send the message 2, the embodiment of the application provides that the network device may add first indication information for indicating the random access mode adopted when the network device sends the message 2 to the message 2; it is also proposed that the network device may use different time-frequency resources to send the message 2 for each random access mode, or the network device may also use different scrambling codes to scramble the message 2 for different random access modes, so that the terminal device can distinguish which random access mode the network device uses to send the message 2 to the end.

In an embodiment of the present application, a message 2 in a random access procedure is divided into a first part and a second part, where the first part is used to instruct a terminal device to receive resource configuration information of the second part of the message 2, and the second part is the other part except the first part in the message 2, and the terminal device receives the message 2 in the random access procedure, which is sent by a network device according to the message 1, and the method includes:

the terminal equipment receives a first part of a message 2 in the random access process sent by the network equipment according to the message 1, analyzes the resource configuration information of a second part of the received message 2 indicated in the first part, and receives the second part of the message 2 in the random access process sent by the network equipment according to the message 1 through the indicated resource configuration information.

The network device sends a message 2 in the random access process to the terminal device according to the message 1, and the message comprises the following steps:

and the network equipment firstly sends the first part in the message 2 in the random access process to the terminal equipment according to the message 1, and then sends the second part in the message 2 in the random access process to the terminal equipment.

When the network device sends the message 2 in the random access process to the terminal device, the message 2 may be divided into two parts, where the first part is used to instruct the terminal device to receive the resource configuration information of the second part of the message 2, and the second part is the other part except the first part in the message 2 and may be referred to as a data part. And the network equipment sends a message 2 in the random access process to the terminal equipment according to the message 1, specifically, the network equipment sends a first part in the message 2 in the random access process to the terminal equipment according to the message 1, and then sends a second part in the message 2 in the random access process to the terminal equipment.

The first part of the message 2 may be carried in a Physical Downlink Control Channel (PDCCH), the second part of the message 2 may be carried in a Physical Downlink Shared Channel (PDSCH), or the first part of the message 2 may be carried in a Physical Downlink Shared Channel (PDSCH), and the second part of the message 2 may be carried in another physical downlink shared channel.

For the 2-step RACH, if the network device successfully receives the random access preamble and the random access data in the message 1 sent by the terminal device, the message 2 and the message 4 in the 4-step RACH are included in the message 2 sent by the network device to the terminal device. Based on this, when the message 2 sent by the network device to the terminal device in the 2-step RACH is divided into two parts, the first part may be the message 2 in the 4-step RACH, i.e., the DCI and RAR shown in fig. 2, and the second part may be the message 4 in the 4-step RACH, i.e., the identity of the terminal device shown in fig. 2. The 2-step RACH is considered successful if the first part includes resource configuration information for receiving the second part.

For the 2-step RACH, if the network equipment only successfully receives the random access preamble in the message 1 sent by the terminal equipment and does not successfully receive the random access data, the network equipment drops the 2-step RACH back to the 4-step RACH, namely, the network equipment returns the message 2 in the 4-step RACH according to the preamble successfully received, the message 2 does not include the identifier of the terminal equipment, and the time-frequency resource for sending the message 3 is distributed in the message 2, so that the terminal equipment can resend the random access data. The time-frequency resource for sending the message 3 is an uplink resource, and in another possible implementation manner, the downlink resource configuration information for receiving the second part of the message 2 and the uplink resource configuration information for sending the message 3 may be indicated in the message 2. Whether the resource configuration information indicated in the message 2 is uplink resources or downlink resources may be indicated by DCI/PDSCH. For example, among the DCI of message 2 or the PDSCH of message 2, the downlink resource allocation of the other PDSCH may be indicated, or the uplink resource allocation of the one PUSCH may be indicated, and the resource type thereof may be indicated by the DCI/PDSCH, and the indication may be in a DCI format, a DCI/PDSCH field, or the like. Further, if the uplink resource allocation of one PUSCH is indicated in the message 2, the 2-step RACH is considered to fall back to the 4-step RACH, otherwise, the 2-step RACH is successful.

Further, both the network device and the terminal device may store the identification bit of the terminal device corresponding to the preamble, and in message 1 in the 2-step RACH, the terminal device sends a random access preamble to the network device, and the terminal device may use the sent random access preamble to indicate a part of the identification bit of the terminal device. The random access preamble may indicate the first or last bits or any number of bits of the terminal device identification bits.

The terminal equipment indicates the identification bit of the terminal equipment through the random access preamble, so that the identification bit of the terminal equipment is reduced when the terminal equipment sends the random access data, and the resource configuration information is reasonably utilized.

The following is a detailed description of different ways of distinguishing.

Fig. 4 is a schematic process diagram of a random access method provided in an embodiment of the present application, which specifically includes the following steps:

s401: and the terminal equipment receives the indication information corresponding to each random access mode sent by the network equipment.

In an embodiment of the present application, before the terminal device performs random access, the network device may configure, for the terminal device, at least two random access modes supported by the network device and indication information corresponding to each random access mode, where the indication information corresponding to each random access mode is different. The terminal equipment acquires the indication information corresponding to each random access mode configured by the network equipment.

Of course, before the terminal device performs random access, the network device also configures a preamble set available for the network device for the terminal device, and sends information such as time-frequency resources of the message 1.

In an embodiment of the present application, the indication information corresponding to each random access method may be predefined by a protocol.

S402: and the terminal equipment sends a message 1 in the random access process to the network equipment.

The terminal device may adopt the four-step random access method to send the message 1, where the message 1 includes the random access preamble, or adopt the two-step random access method to send the message 1, where the message 1 includes the random access preamble and the random access data.

And the terminal equipment sends the message 1 in the random access process to the network equipment, and the network equipment receives the message 1 in the random access process sent by the terminal equipment.

S403: the network equipment adds first indication information used for indicating a random access mode adopted when the network equipment sends the message 2 in the message 2.

S404: and the network equipment sends a message 2 in the random access process to the terminal equipment.

After receiving a message 1 sent by a terminal device, a network device may determine which random access mode to send a message 2, then generate the message 2 in a random access process according to the message 1, and add first indication information in the message 2, where the first indication information is used to indicate the random access mode used when the network device sends the message 2; the above process may be understood as that the network device sends a message 2 in the random access process to the terminal device according to the message 1.

Assuming that the network device sends the message 2 in a four-step random access manner or a two-step random access manner, the process of generating the message 2 according to the information in the message 1 is described in the four-step random access manner and the two-step random access manner, and details are not described here.

S405: and the terminal equipment determines which random access mode is adopted by the network equipment to send the message 2 according to the first indication information in the message 2.

And the terminal equipment receives the message 2 in the random access process sent by the network equipment according to the message 1, and the terminal equipment determines the message 2 sent by the network equipment in which random access mode is adopted according to the first indication information in the message 2.

The message 2 includes downlink control information, and the network device and the terminal device may agree to add the first indication information in a preset field in the downlink control information in the message 2. For example, the network device may modify a field format of the existing downlink control information, add a new field in a preset position, and add the indication information to the newly added field to indicate which random access method the network device uses to send the message 2, where the newly added field may occupy 1Bit.

The message 2 includes a random access response, and the network device and the terminal device may agree to add the first indication information in a preset field in the random access response in the message 2.

The random access response includes reserved fields of 3 bits, and any one of the reserved fields may be selected to add first indication information for indicating which random access method the network device transmits, for example, when an indication value of the selected field is 0, the network device indicates that the network device transmits a message 2 in a two-step random access method, and when an indication value of the selected field is 1, the network device indicates that the network device transmits a message 2 in a four-step random access method.

The random access response includes a plurality of sub-protocol data units, each sub-protocol data unit has a corresponding sub-header, the sub-header includes an extension field originally indicating whether the sub-protocol data unit is still present, first indication information may be added to any extension field in the sub-header of any sub-protocol data unit in the random access response in the message 2, the first indication information is used to indicate which random access mode is used for sending the message 2, for example, when the extension field is 0, the message 2 is sent by the network device in a two-step random access mode, and when the extension field is 1, the message 2 sent by the network device in a four-step random access mode is indicated.

Fig. 5 is a schematic process diagram of a random access method provided in an embodiment of the present application, which specifically includes the following steps:

s501: and the terminal equipment receives the time-frequency resources corresponding to each random access mode sent by the network equipment.

In an embodiment of the present application, before the terminal device performs random access, the network device may configure, for the terminal device, at least two random access modes supported by the network device and time-frequency resources corresponding to each random access mode, where the time-frequency resources corresponding to each random access mode are different. The terminal equipment acquires time-frequency resources corresponding to each random access mode configured by the network equipment. For example, if the network device sends configuration information to the terminal, the terminal device receives the configuration information sent by the network device, where the configuration includes a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2. The configuration information is any one of the following: SIB information, RMSI information, PDCCH configuration information, RACH configuration information.

In an embodiment of the present application, the video resource corresponding to each random access manner may be predefined by a protocol.

S502: and the terminal equipment sends a message 1 in the random access process to the network equipment.

S503: the network device determines the time-frequency resources to send message 2.

S504: and the network equipment sends a message 2 in the random access process to the terminal equipment.

After receiving the message 1, the network device may generate a message 2 in a random access process according to the message 1, and determine which random access mode is used to send the message 2, and when sending the message 2, send the message 2 to the terminal device by using a time-frequency resource corresponding to the random access mode, where the time-frequency resource occupied by the message 2 is used to indicate the random access mode used when the network device sends the message 2;

the above process may be understood as that the network device sends the message 2 in the random access process to the terminal device according to the message 1.

S505: and the terminal equipment determines which random access mode is adopted by the network equipment to send the message 2 according to the time-frequency resource occupied by the message 2.

And the terminal equipment receives the message 2 in the random access process sent by the network equipment according to the message 1, and determines the message 2 sent by the network equipment in which random access mode is adopted according to the time-frequency resource for receiving the message 2.

And distinguishing the message 2 sent by the network equipment in which random access mode is adopted by the network equipment through the time-frequency resource occupied by the message 2, thereby distinguishing the random access mode adopted by the terminal equipment in which random access mode is adopted.

The time-frequency resource difference may be a time-domain resource difference and/or a frequency-domain resource difference.

The time domain resources may be different in that the time windows are not overlapped, or may be the same in that the occupied time positions are different.

It is assumed that there are two random access manners, which are a first random access manner and a second random access manner, and the time windows for sending the message 2 based on the first random access manner and the second random access manner are not overlapped, or the time windows for sending the message 2 based on the first random access manner and the second random access manner are the same, and in one time window, different time positions are related to the types of the random access manners, for example, an even time position is a time domain resource for sending the message 2 by the network device using the first random access manner, and an odd time position is a time domain resource for sending the message 2 by the network device using the second random access manner. For example, the first half of the time window is a time domain resource for the network device to send the message 2 in the first random access manner, and the second half of the time window is a time domain resource for the network device to send the message 2 in the second random access manner.

Fig. 6 is a schematic process diagram of a random access method provided in an embodiment of the present application, which specifically includes the following steps:

s601: and the terminal equipment receives the scrambling codes corresponding to each random access mode sent by the network equipment.

In an embodiment of the present application, before the terminal device performs random access, the network device may configure, for the terminal device, at least two random access manners supported by the network device, and scrambling codes corresponding to each random access manner are different. The terminal equipment acquires the scrambling code corresponding to each random access mode configured by the network equipment.

In an embodiment of the present application, a scrambling code corresponding to each random access method may be predefined by a protocol.

S602: and the terminal equipment sends a message 1 in the random access process to the network equipment.

And the terminal equipment sends the message 1 in the random access process to the network equipment, and then the network equipment receives the message 1 in the random access process sent by the terminal equipment.

S603: the network device scrambles the message 2 with a scrambling code.

S604: and the network equipment sends a message 2 in the random access process to the terminal equipment.

After receiving the message 1, the network device may generate a message 2 in a random access process according to the message 1, determine which random access mode is used to send the message 2, and scramble the message 2 by using a scrambling code corresponding to the random access mode before sending the message 2, where the scrambling code used by the message 2 is used to indicate the random access mode used when the network device sends the message 2;

the above process may be understood as that the network device sends a message 2 in a random access process to the terminal device according to the message 1, and the message 2 is scrambled.

S605: and the terminal equipment determines the message 2 which is sent by the network equipment in a random access mode according to the scrambling code of the message 2.

And the terminal equipment receives the message 2 in the random access process sent by the network equipment according to the message 1, and determines which random access mode the network equipment adopts to send the message 2 according to the scrambling code of the message 2.

And distinguishing the message 2 sent by the network equipment by adopting which random access mode through the scrambling code adopted by the message 2, thereby distinguishing which random access mode is adopted by the terminal equipment to randomly access the network.

Illustratively, the scrambling code is a random access radio network temporary identity RA-RNTI.

Illustratively, the scrambling code is a cell radio network temporary identity C-RNTI.

Illustratively, the scrambling code is a system information radio network temporary identity (SI-RNTI).

Illustratively, the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1; or the scrambling code is determined according to different index values for indicating different random access modes.

For example, if the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1, the following formula may be used to determine the scrambling code:

wherein s _ id represents the starting symbol of preamble of random access preamble, t _ id represents the starting slot of preamble, f _ id represents the index of preamble in frequency domain, and ul _ carrier _ id represents the carrier index of preamble.

For example, if the scrambling code is determined according to different index values indicating different random access manners, the following formula may be used to determine the scrambling code:

Scrambling code =

1+s_id+14×t_id+14×80×f_id+14×80×8×ul_carrier_id+14×80×8×2×RACH_type；

In addition, similar to the principle of the above scheme, the terminal device may also support multiple random access manners, and the network device may also distinguish which random access manner the terminal device employs for random access, specifically distinguish which random access manner the terminal device employs for sending the message 1.

For example, when the network device configures the terminal device with different third indication information for indicating different random access modes when sending the message 1, the terminal device sends the message 1 in the random access process to the network device, the message 1 carries the third indication information, the network device receives the message 1 in the random access process sent by the terminal device, the message 1 includes the third indication information, and the random access mode adopted when the terminal device sends the message 1 is determined according to the third indication information; the terminal equipment supports at least one random access mode, and the third indication information corresponding to each random access mode is different.

For another example, when the network device configures time-frequency resources corresponding to different random access modes for the terminal device when sending the message 1, the terminal device sends the message 1 in the random access process to the network device, the network device receives the message 1 in the random access process sent by the terminal device, and the time-frequency resources occupied by the message 1 are used for indicating the random access mode adopted when the terminal device sends the message 1; the terminal equipment supports at least one random access mode, and the time frequency resources used when the terminal equipment sends the message 1 based on each random access mode are different. And the network equipment determines which random access mode is adopted by the terminal equipment to send the message 1 according to the time-frequency resource occupied by the received message 1.

For another example, when the network device configures a terminal device with a preamble set corresponding to different random access modes when sending the message 1, the terminal device sends the message 1 in the random access process to the network device, the network device receives the message 1 in the random access process sent by the terminal device, and the preamble included in the message 1 is used for indicating the random access mode adopted when the terminal device sends the message 1; the terminal equipment supports at least one random access mode, and lead code sets corresponding to the terminal equipment based on each random access mode are not overlapped. And the network equipment determines which random access mode is adopted by the terminal equipment to send the message 1 according to the lead code contained in the message 1.

In yet another possible embodiment, when performing random access by using the two-step random access method, the terminal device may determine whether the random access is successful according to whether the received message 2 includes a time-frequency resource for retransmitting the random access data, or whether the two-step random access method falls back to the four-step random access method, and if the message 2 does not include the time-frequency resource for retransmitting the random access data, it determines that the random access by the terminal device is successful; and if the message 2 contains the time-frequency resource for retransmitting the random access data, determining that the two-step random access mode falls back to the four-step random access mode, and retransmitting the random access data on the time-frequency resource allocated in the message 2.

The network device may also configure, for the terminal device, different time-frequency resources for the message 2 indicating that the random access is successful and the message 2 indicating that the two-step random access mode falls back to the four-step random access mode, where for example, the first time-frequency resource indicates that the random access is successful, and the second time-frequency resource indicates that the two-step random access mode falls back to the four-step random access mode. The network equipment adopts any one of the above-mentioned ways of distinguishing which random access way the terminal equipment adopts to send the message 1 to identify the message 1 that the terminal equipment adopts the two-step random access way, when the terminal equipment adopts the two-step random access way to send the message 1, the message 1 includes random access preamble and random access data, if the network equipment successfully receives the random access preamble and the random access data sent by the terminal equipment, the network equipment sends the message 2 on the first time frequency resource, if the network equipment only successfully receives the random access preamble, and does not successfully receive the random access data, the network equipment falls back to the four-step random access way from the two-step random access way, and sends the message 2 on the second time frequency resource.

If the terminal equipment receives the message 2 sent by the network equipment on the first time-frequency resource, the random access success of the terminal equipment is determined, if the terminal equipment receives the message 2 sent by the network equipment on the second time-frequency resource, the network equipment is determined not to successfully receive the random access data, the two-step random access mode is returned to the four-step random access mode, and the random access data is retransmitted on the time-frequency resource distributed in the message 2.

Based on the same inventive concept as the random access method, as shown in fig. 7, an embodiment of the present application further provides a random access apparatus 700, where the random access apparatus 700 may be configured to perform an operation performed by a terminal device in the random access method, and the random access apparatus 700 includes: a processing unit 701 and a transmitting/receiving unit 702. The processing unit 701 is configured to generate a message 1 in a random access process; the transceiving unit 702 is configured to send a message 1 in a random access procedure to a network device; and receiving a message 2 in the random access process sent by the network equipment according to the message 1.

Illustratively, the message 2 includes first indication information, where the first indication information is used to indicate a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, and the indication information corresponding to each random access mode is different;

for example, the time-frequency resource occupied by the message 2 is used to indicate a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, and the time frequency resources used when the network equipment sends the message 2 based on each random access mode are different.

The transceiver unit 702 is further configured to receive configuration information sent by a network device, where the configuration includes a corresponding relationship, where the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

Illustratively, the scrambling code adopted by the message 2 is used to indicate a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, and the scrambling codes corresponding to each random access mode are different.

Optionally, the transceiver unit (module) 702 may include a receiving unit (module) and/or a transmitting unit (module) for performing the steps of receiving and transmitting in the method embodiment and the terminal device in fig. 1 to 6, respectively.

Optionally, the sending unit is configured to send a message 1 in a random access process to the network device;

and the receiving unit is used for receiving the message 2 in the random access process sent by the network equipment according to the message 1.

The receiving unit is further configured to receive configuration information sent by the network device, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

Optionally, the random access apparatus 700 may further include a storage unit, configured to store instructions executed by the transceiver unit 702 and the processing unit 701.

The random access apparatus 700 may be a terminal device, or may be a chip in the terminal device. When the random access apparatus 700 is a terminal device, the processing unit may be a processor, and the transceiving unit may be a transceiver. The random access apparatus 700 may further include a storage unit, which may be a memory. The storage unit is used for storing instructions, and the processing unit executes the instructions stored by the storage unit so as to enable the terminal equipment to execute the method. When the random access apparatus 700 is a chip in a terminal device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes the instructions stored in the storage unit, which may be a storage unit (e.g., register, cache, etc.) in the chip or a storage unit (e.g., read-only memory, random access memory, etc.) outside the chip in the terminal device, so as to make the random access apparatus 700 perform the operations performed by the terminal device in the above method embodiments.

It can be clearly understood by those skilled in the art that, when the steps executed by the random access apparatus 700 and the corresponding beneficial effects are described in the foregoing method embodiments, the description thereof is omitted here for brevity.

It is to be understood that the transceiving unit 702 may be implemented by a transceiver and the processing unit 701 may be implemented by a processor. The storage unit may be implemented by a memory.

Based on the same inventive concept as the random access method, as shown in fig. 8, an embodiment of the present application further provides a random access apparatus 800, where the random access apparatus 800 is configured to perform an operation performed by a network device in the random access method, and the random access apparatus 800 includes: a processing unit 801 and a transceiver 802. The transceiver 802 is configured to receive a message 1 in a random access process sent by a terminal device; the processing unit 801 is configured to generate a message 2 in a random access process according to the message 1, and the transceiver unit 802 is further configured to send the message 2 in the random access process to the terminal device according to the message 1.

for example, the time-frequency resource occupied by the message 2 is used to indicate a random access mode adopted when the network device sends the message 2; the network device supports at least two random access modes, and the time frequency resources used by the network device for sending the message 2 based on each random access mode are different.

The transceiver unit 802 is further configured to send configuration information to the terminal, where the configuration includes a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

Optionally, the transceiver unit (module) 802 may include a receiving unit (module) and/or a transmitting unit (module) for performing the steps of receiving and transmitting in the method embodiment and the network device in fig. 1 to 6, respectively.

Optionally, the receiving unit is configured to receive a message 1 sent by the terminal device in a random access process;

the sending unit is further used for sending a message 2 in the random access process to the terminal equipment according to the message 1;

and the sending unit is further configured to send configuration information to the terminal device, where the configuration includes a corresponding relationship, and the corresponding relationship is a corresponding relationship between different random access manners and different time-frequency resources used for sending the message 2.

Optionally, the random access apparatus 800 may further include a storage unit, configured to store instructions executed by the transceiver unit 802 and the processing unit 801.

The random access apparatus 800 may be a network device, or may be a chip within the network device. When the random access apparatus 800 is a network device, the processing unit may be a processor, and the transceiver unit may be a transceiver. The random access apparatus 800 may further include a storage unit, which may be a memory. The storage unit is used for storing instructions, and the processing unit executes the instructions stored by the storage unit so as to enable the network device to execute the method. When the random access apparatus 800 is a chip in a network device, the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin, a circuit, or the like; the processing unit executes the instructions stored in the storage unit (e.g., a register, a cache, etc.) in the chip or a storage unit (e.g., a read-only memory, a random access memory, etc.) outside the chip in the network device, so as to make the random access apparatus 800 perform the operations performed by the network device in the above method embodiments.

It is clear to those skilled in the art that, when the steps executed by the random access apparatus 800 and corresponding beneficial effects are referred to the related description of the network device in the foregoing method embodiment, for brevity, no further description is provided herein.

It is to be understood that the transceiving unit 802 may be implemented by a transceiver and the processing unit 801 may be implemented by a processor. The storage unit may be implemented by a memory.

Based on the same inventive concept as the random access method, as shown in fig. 9, an embodiment of the present application further provides a random access apparatus 900, where the random access apparatus 900 is configured to perform an operation performed by a terminal device in the random access method, and the random access apparatus 900 includes: a processor 901 and a transceiver 902, and optionally a memory 903. The processor 901 is configured to invoke a set of programs, and when the programs are executed, the processor 901 is caused to perform the operations performed by the terminal device in the random access method described above. The memory 903 is used for storing programs executed by the processor 901. The functional module processing units 701 in fig. 7 may be implemented by a processor 901, and the transceiver unit 702 may be implemented by a transceiver 902.

Optionally, the transceiver 902 may comprise a receiver and/or a transmitter for performing the steps of the method embodiments and the terminal device receiving and transmitting in fig. 1-6, respectively.

a receiving unit, configured to receive a message 2 in the random access process sent by the network device according to the message 1.

Based on the same inventive concept as the random access method, as shown in fig. 10, an embodiment of the present application further provides a random access apparatus 1000, where the random access apparatus 1000 is configured to perform an operation performed by a network device in the random access method, and the random access apparatus 1000 includes: processor 1001 and transceiver 1002, and optionally memory 1003. The processor 1001 is configured to invoke a set of programs, and when the programs are executed, the processor 1001 is enabled to execute the operations performed by the network device in the random access method. The memory 1003 is used for storing programs executed by the processor 1001. The functional blocks in fig. 8, the processing unit 801 may be implemented by a processor 1001, and the transceiver unit 802 may be implemented by a transceiver 1002.

Optionally, the transceiver 1002 may include a receiver and/or a transmitter for performing the steps of the method embodiments and the network device receiving and transmitting in fig. 1-6, respectively.

Optionally, the receiver is configured to receive a message 1 sent by the terminal device in a random access process;

and the transmitter is also used for transmitting a message 2 in the random access process to the terminal equipment according to the message 1.

The processor may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.

The processor may further include a hardware chip or other general purpose processor. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLDs may be Complex Programmable Logic Devices (CPLDs), field-programmable gate arrays (FPGAs), general Array Logic (GALs) and other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., or any combination thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

An embodiment of the present application provides a computer storage medium, which stores a computer program, where the computer program includes instructions for executing the above random access method.

Embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to perform the random access method provided above.

Any random access device provided by the embodiment of the present application may also be a chip.

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

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

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

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

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.

Claims

1. A random access method, comprising:

the terminal equipment sends a message 1 in the random access process to the network equipment;

the terminal device receives a message 2 in a random access process sent by the network device according to the message 1, wherein a scrambling code adopted by the message 2 is used for indicating a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, the scrambling code corresponding to each random access mode is different, the scrambling code is determined according to different index values for indicating different random access modes, and the scrambling code is used for scrambling downlink control information DCI corresponding to the message 2.

2. The method of claim 1, wherein the scrambling code satisfies the following formula:

scrambling code =1+ s \ u id +14 × t _ id +14 × 80 × f _ id +14 × 80 × 8 × ul _ carrier _ id +14 × 80 × 8 × 2 × RACH _ type;

wherein s _ id represents a starting symbol for sending preamble, t _ id represents a starting slot for sending preamble, f _ id represents an index of sending preamble on a frequency domain, ul _ carrier _ id represents an index of a carrier for sending preamble, and RACH _ type represents an index value of an adopted random access mode.

3. The method according to claim 1 or 2, wherein the at least two random access modes comprise a 2-step random access mode and a 4-step random access mode.

4. The method according to claim 1 or 2, wherein the scrambling code is any one of a random access radio network temporary identity, RA-RNTI, a cell radio network temporary identity, C-RNTI, a system message cell radio network temporary identity, SI-RNTI.

5. The method according to claim 1 or 2, wherein the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1.

6. A random access method, comprising:

the network equipment receives a message 1 in the random access process sent by the terminal equipment;

the network device sends a message 2 in a random access process to the terminal device according to the message 1, wherein a scrambling code adopted by the message 2 is used for indicating a random access mode adopted when the network device sends the message 2; the network equipment supports at least two random access modes, the scrambling code corresponding to each random access mode is different, the scrambling code is determined according to different index values for indicating different random access modes, and the scrambling code is used for scrambling downlink control information DCI corresponding to the message 2.

7. The method of claim 6, wherein the scrambling code satisfies the following formula:

8. The method according to claim 6 or 7, wherein the at least two random access modes comprise a 2-step random access mode and a 4-step random access mode.

9. The method according to claim 6 or 7, wherein the scrambling code is any one of a random access radio network temporary identity, RA-RNTI, a cell radio network temporary identity, C-RNTI, a system message cell radio network temporary identity, SI-RNTI.

10. The method according to claim 6 or 7, wherein the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1.

11. A random access apparatus, comprising: a transmitting unit and a receiving unit;

the sending unit is used for sending a message 1 in the random access process to the network equipment;

the receiving unit is configured to receive a message 2 in a random access process sent by the network device according to the message 1, where a scrambling code used in the message 2 is used to indicate a random access manner used when the network device sends the message 2; the network equipment supports at least two random access modes, the scrambling code corresponding to each random access mode is different, the scrambling code is determined according to different index values for indicating different random access modes, and the scrambling code is used for scrambling downlink control information DCI corresponding to the message 2.

12. The apparatus of claim 11, wherein the scrambling code satisfies the following formula:

13. The apparatus according to claim 11 or 12, wherein the at least two random access modes include a 2-step random access mode and a 4-step random access mode.

14. The apparatus according to claim 11 or 12, wherein the scrambling code is any one of a random access radio network temporary identity RA-RNTI, a cell radio network temporary identity C-RNTI, a system message cell radio network temporary identity SI-RNTI.

15. The apparatus of claim 11 or 12, wherein the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1.

16. A random access apparatus, comprising: a transmitting unit and a receiving unit;

the receiving unit is used for receiving a message 1 sent by the terminal equipment in the random access process;

the sending unit is further configured to send a message 2 in a random access process to the terminal device according to the message 1, where a scrambling code used in the message 2 is used to indicate a random access manner used when the device sends the message 2; the device supports at least two random access modes, the scrambling code corresponding to each random access mode is different, the scrambling code is determined according to different index values for indicating different random access modes, and the scrambling code is used for scrambling downlink control information DCI corresponding to the message 2.

17. The apparatus of claim 16, wherein the scrambling code satisfies the following equation:

18. The apparatus according to claim 16 or 17, wherein the at least two random access schemes comprise a 2-step random access scheme and a 4-step random access scheme.

19. The apparatus according to claim 16 or 17, wherein the scrambling code is any one of a random access radio network temporary identity, RA-RNTI, a cell radio network temporary identity, C-RNTI, a system message cell radio network temporary identity, SI-RNTI.

20. The apparatus of claim 16 or 17, wherein the scrambling code is related to an index corresponding to a frequency domain used for transmitting the random access preamble in the message 1.

21. A computer-readable storage medium having computer-readable instructions stored thereon which, when read and executed by a computer, cause the computer to perform the method of any one of claims 1-10.

22. A random access apparatus, comprising: a processor for executing a computer program or instructions in a memory, which when executed by the processor, causes the apparatus to perform the method of any of claims 1-10.

23. A random access apparatus, comprising: a processor and a memory, the memory having stored therein a computer program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-10.