WO2018102966A1

WO2018102966A1 - Method for random access, network device, and terminal device

Info

Publication number: WO2018102966A1
Application number: PCT/CN2016/108587
Authority: WO
Inventors: 唐海
Original assignee: 广东欧珀移动通信有限公司
Priority date: 2016-12-05
Filing date: 2016-12-05
Publication date: 2018-06-14
Also published as: TW201822573A; CN109644503A; TWI687120B; CN109644503B

Abstract

Embodiments of the present invention provide a method for random access, a network device, and a terminal device. The method has high compatibility and is favorable for a terminal device to accurately determine a random access response (RAR) belonging to the terminal device itself. The method comprises: a network device receives a random access request message sent by a first terminal device, the random access request message carrying a random access preamble; the network device determines a random access radio network temporary identifier (RA-RNTI) according to the random access request message; the network device sends an RAR message according to the RA-RNTI, the RAR message carrying preamble information and indication information, the preamble information being used for indicating the random access preamble, and the preamble information and the indication information being used for the first terminal device in at least one terminal device receiving the RAR message to determine that the RAR message belongs to the first terminal device.

Description

Method, network device and terminal device for random access

Technical field

Embodiments of the present invention relate to the field of communications technologies, and, more particularly, to a method, a network device, and a terminal device for random access.

Background technique

In the existing Long Term Evolution (LTE) system, when the network device receives the random access request message sent by the terminal device, the network device sends the physical downlink shared channel (Physical Downlink Shared CHannel, PDSCH). A Random Access Response (RAR) message, where the random access request message carries a random access preamble. The RAR message carries an index of a random access preamble, time adjustment information for uplink synchronization, initial uplink resource allocation (for transmitting subsequent msg3) information, and a temporary cell radio network temporary identifier (Cell-Radio Network Temporary) Identifier, C-RNTI).

After receiving the random access request message, the terminal device needs to use a Random Access-Radio Network Temporary Identifier (RA-RNTI) to monitor the Physical Downlink Control Channel (PDCCH) for receiving. Belong to your own RAR message. If the random access preamble of the RAR message received by the terminal device is the same as the random access preamble sent by the terminal device, the terminal device determines that the RAR message belongs to itself, and performs corresponding operations according to the information carried in the RAR message.

However, using this method to determine the RAR message belonging to itself has a large limitation, which is disadvantageous for the terminal device to accurately determine the RAR message belonging to itself.

Summary of the invention

The embodiments of the present invention provide a method, a network device, and a terminal device for random access. The method has high compatibility, and is beneficial for the terminal device to accurately determine the RAR message that belongs to itself.

The first aspect provides a method for random access, where the method includes: receiving, by a network device, a random access request message sent by a first terminal device, where the random access request message carries a random access preamble; the network Determining, by the device, a random access radio network temporary identifier RA-RNTI according to the random access request message; the network device sending a random access response RAR message according to the RA-RNTI, The RAR message carries preamble information and indication information, where the preamble information is used to indicate the random access preamble, and the preamble information and the indication information are used to receive the first one of the at least one terminal device of the RAR message. The terminal device determines that the RAR message belongs to the first terminal device.

Compared with the RAR message of the random access preamble carried by the RAR message in the prior art, the first terminal device determines the RAR message that belongs to itself according to the indication information and the preamble information. The method has high compatibility, and is advantageous for the first terminal device to accurately determine the RAR message that belongs to itself, so that the first terminal device can perform the random access process efficiently.

In a possible implementation manner of the first aspect, the determining, by the network device, the RA-RNTI according to the random access request message, the network device determining, according to the first resource information of the resource occupied by the random access request message, the RA-RNTI The indication information includes: second resource information of the resource occupied by the random access request message, information about a function value of the second resource information of the resource occupied by the random access request message, and the random access request At least one of the information carried by the message other than the random preamble, wherein the first resource information and the second resource information are different.

The indication information may include multiple types of information, which is flexible, so that the terminal device can efficiently determine the RAR message belonging to itself according to the indication information.

In a possible implementation manner of the first aspect, the first resource information is used to indicate a frequency domain resource that is occupied by the random access request message, and the second resource information is used to indicate a time domain resource that is occupied by the random access request message.

Compared with the information about the frequency domain resource occupied by the random access request message and the information of the time domain resource in the prior art, the network device and the first terminal device may be configured according to the random access request. The first resource information of the frequency domain resource occupied by the message determines the RA-RNTI, and the second resource information of the time domain resource occupied by the random access request message is sent to the first terminal device by using the RAR message, so that the first terminal device can obtain the RA. - The complexity of the RNTI, while enabling the first terminal device to accurately determine its own RAR message.

In a possible implementation manner of the first aspect, the first resource information is used to indicate a frequency domain resource and a time domain resource that are occupied by the random access request message, where the second resource information is used to indicate that the random access request message is occupied. The time domain resource, and the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.

In this solution, the first resource information indicates the time domain resource and the frequency domain resource, but the granularity of the time domain resource indicated by the first resource information is large, and the first terminal device may be reduced. The complexity of the RA-RNTI, the granularity of the time domain resource indicated by the second resource is small, and the first terminal device can accurately determine the RAR message belonging to itself. The scheme can balance the complexity of receiving the RAR message by the terminal device and the determined number of times the terminal device determines the RAR message belonging to itself.

In a possible implementation manner of the first aspect, the second resource information is specifically used to indicate a start location of the time domain resource occupied by the random access request message and an end location of the time domain resource occupied by the random access request message. At least one of them.

In this solution, the second resource information may indicate a starting location and/or an ending location, and the scheme has high flexibility and high compatibility and applicability.

In a possible implementation of the first aspect, the second resource information is specifically used to indicate at least one of the following information: a number of a first subframe occupied by the random access request message; the random access request message is occupied The number of the first time slot or the first mini time slot; the number of the last subframe occupied by the random access request message; the last time slot occupied by the random access request message or the last mini time slot Numbering.

In a possible implementation manner of the first aspect, the information of the function value is used to indicate at least one of the following information: a number of the first subframe occupied by the RAR message and a first one occupied by the random access request message The difference between the numbers of the subframes; the difference between the number of the first slot occupied by the RAR message and the number of the first slot occupied by the random access request message, or the RAR message occupation The difference between the number of the first minislot and the number of the first minislot occupied by the random access request message; the number of the last subframe occupied by the RAR message is occupied by the random access request message The difference between the numbers of the last subframe; the difference between the number of the last slot occupied by the RAR message and the number of the last slot occupied by the random access request message, or the RAR message occupation The difference between the number of the last minislot and the number of the last minislot occupied by the random access request message.

In a possible implementation manner of the first aspect, the information that is other than the random preamble carried by the random access request message includes location information of the first terminal device, identifier information of the first terminal device, and the random access. At least one of the transmission timestamps of the request message.

The solution not only enables the first terminal device to accurately determine the RAR message that belongs to itself, but further, the solution can fuse the msg2 message and the msg3 in the LTE system, which can save signaling overhead and improve the efficiency of random access of the terminal device.

In a possible implementation manner of the first aspect, the indication information is carried in a medium access control sub-header MAC subheader or MAC RAR of the RAR message.

In this solution, the indication information can be flexibly carried in the RAR message with high compatibility.

A second aspect provides a method for random access, where the method includes: a first terminal device sends a random access request message to a network device, where the random access request message carries a random access preamble; the first terminal The device determines, according to the random access request message, a random access radio network temporary identifier RA-RNTI, and the first terminal device receives, according to the RA-RNTI, a random access response RAR message sent by the network device, where the RAR message carries preamble information. And the indication information; the first terminal device determines, according to the random access preamble, the preamble information, and the indication information that are included in the random access request message, whether the RAR message belongs to the first terminal device.

Compared with the RAR message of the random access preamble carried by the RAR message in the prior art, the first terminal device determines the RAR message that belongs to itself according to the indication information and the preamble information. The accuracy of determining the RAR message belonging to the first terminal device by itself can be improved, so that the terminal device can perform random access efficiently.

In a possible implementation manner of the second aspect, the first terminal device, according to the RA-RNTI, receives a random access response (RAR) message sent by the network device, and includes: the resource occupied by the first terminal device according to the random access request message. The first resource information determines the RA-RNTI; if the random access preamble indicated by the preamble information is the same as the random access preamble carried in the random access request message, and the indication information includes: the random access request The second resource information of the resource occupied by the message, the second resource information of the resource occupied by the random access request message, the function value of the variable, and the random access preamble carried by the random access request message At least one of the information, the method further includes: the first terminal device determines that the RAR message belongs to the first terminal device; wherein the first resource information and the second resource information are different.

The first terminal device determines the RAR message belonging to itself according to the preamble information and the indication information, so that the first terminal device can efficiently determine the RAR message belonging to itself.

In a possible implementation manner of the second aspect, the first resource information is used to indicate a frequency domain resource that is occupied by the random access request message, and the second resource information is used to indicate a time domain resource that is occupied by the random access request message.

Compared with the information about the frequency domain resource and the information of the time domain resource occupied by the random access request message in the prior art, the first terminal device can be occupied according to the random access request message. The first resource information of the frequency domain resource determines the RA-RNTI, and the second resource information of the time domain resource occupied by the random access request message is sent to the first terminal by using the RAR message. The device can reduce the complexity of acquiring the RA-RNTI by the first terminal device, and can improve the accuracy of the first terminal device determining the RAR message that belongs to itself.

In a possible implementation manner of the second aspect, the first resource information is used to indicate a frequency domain resource and a time domain resource that are occupied by the random access request message, where the second resource information is used to indicate that the random access request message is occupied. The time domain resource, and the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.

The first resource information indicates the time domain resource and the frequency domain resource, but the granularity of the time domain resource indicated by the first resource information is large, which can reduce the complexity of acquiring the RA-RNTI by the first terminal device, and can improve the complexity. The efficiency with which a terminal device receives its own RAR message. The scheme can balance the complexity of receiving the RAR message by the terminal device and the determined number of times the terminal device determines the RAR message belonging to itself.

In a possible implementation manner of the second aspect, the second resource information is specifically used to indicate a start location of the time domain resource occupied by the random access request message and an end location of the time domain resource occupied by the random access request message. At least one of them.

In a possible implementation manner of the second aspect, the second resource information is specifically used to indicate at least one of the following information: a number of the first subframe occupied by the random access request message; the random access request message is occupied The number of the first time slot or the first mini time slot; the number of the last subframe occupied by the random access request message; the last time slot occupied by the random access request message or the last mini time slot Numbering.

In a possible implementation manner of the second aspect, the information of the function value is used to indicate at least one of the following information: a number of the first subframe occupied by the RAR message and a first one occupied by the random access request message The difference between the numbers of the subframes; the difference between the number of the first slot occupied by the RAR message and the number of the first slot occupied by the random access request message, or the RAR message occupation The difference between the number of the first minislot and the number of the first minislot occupied by the random access request message; the number of the last subframe occupied by the RAR message is occupied by the random access request message The difference between the numbers of the last subframe; the difference between the number of the last slot occupied by the RAR message and the number of the last slot occupied by the random access request message, or the RAR message occupation The difference between the number of the last minislot and the number of the last minislot occupied by the random access request message.

In a possible implementation manner of the second aspect, the information that is included in the random access request message except the random preamble includes location information of the first terminal device, and an identifier of the first terminal device. And at least one of a transmission time stamp of the random access request message.

The solution can not only improve the accuracy of the terminal device to determine the RAR message of the terminal. In addition, the solution can combine the msg2 message and the msg3 in the LTE system, which can save signaling overhead and improve the efficiency of random access of the terminal device.

In a possible implementation manner of the second aspect, the indication information is carried in a medium access control sub-header MAC subheader or MAC RAR of the RAR message.

In a possible implementation manner of the second aspect, if the random access preamble indicated by the preamble information is different from the random access preamble carried by the random access request message, or the indication information does not match the random request message, The method further includes: the first terminal device determines that the RAR message does not belong to the first terminal device, where the indication information does not match the random access request message, and includes: the resource information included in the indication information and the random connection The second resource information of the resource occupied by the incoming request message is different; and/or the information of the function value included in the indication information is different from the information of the function value of the second resource information of the resource occupied by the random access request message; And/or the location information included in the indication information is different from the location information of the first terminal device carried in the random access request message; and/or the identifier information included in the indication information and the first part carried in the random access request message The identification information of a terminal device is different; and/or the sending timestamp included in the indication information and the sending time carried by the random access request message The stamp is different.

In a third aspect, a network device is provided for performing the method of the first aspect or any possible implementation of the first aspect. In particular, the network device may comprise modules and/or units for performing the method of any of the first aspect or the first aspect of the first aspect described above.

In a fourth aspect, a terminal device is provided for performing the method in any of the possible implementations of the second aspect or the second aspect. In particular, the terminal device may comprise modules and/or units for performing the method of any of the above-described second or second aspects of the second aspect.

A fifth aspect provides a network device, including: a transceiver, a memory, and a processor, the transceiver for transmitting and receiving signals, the memory for storing instructions, the processor for executing instructions stored by the memory, and the memory Execution of the instructions stored in the processor causes the processor to perform the method of the first aspect or any possible implementation of the first aspect.

A sixth aspect provides a terminal device, including: a transceiver, a memory, and a processor, the transceiver for transmitting and receiving signals, the memory for storing instructions, and the processor for performing the storage The instructions stored by the device, and the execution of the instructions stored in the memory, cause the processor to perform the method of any of the possible implementations of the second aspect or the second aspect.

In a seventh aspect, a computer storage medium is provided having stored therein program code for indicating execution of instructions in any of the first aspect or any of the possible implementations of the first aspect.

In an eighth aspect, a computer storage medium is provided having stored therein program code for indicating execution of instructions in any of the possible implementations of the second aspect or the second aspect above.

In a ninth aspect, a system chip is provided, the system chip comprising an input interface, an output interface, a processor, and a memory, the processor is configured to execute code in the memory, and when the code is executed, the processor can implement the foregoing The first aspect and the methods in various implementations.

In a tenth aspect, a system chip is provided, the system chip comprising an input interface, an output interface, a processor, and a memory, the processor is configured to execute code in the memory, and when the code is executed, the processor can implement the foregoing The second aspect and the methods in various implementations.

Therefore, in the embodiment of the present invention, the RAR message may carry the indication information and the preamble information, where the indication information may include the second resource information of the resource occupied by the access request message, and the random access request message The second resource information of the occupied resource is at least one of the function value of the variable and the information other than the random preamble carried by the random access request message, so that the first terminal device can according to the indication information. And the preamble information accurately determines the RAR message belonging to itself.

DRAWINGS

1 is a schematic diagram of a wireless communication system suitable for use in an embodiment of the present invention.

2 is a schematic flow chart of a method for random access according to an embodiment of the present invention.

3 is a schematic diagram of a medium access control subhead MAC subheader suitable for use in an embodiment of the present invention.

4 is a schematic diagram of an example of a MAC RAR applicable to an embodiment of the present invention.

FIG. 5 is a schematic diagram of another example of a MAC RAR applicable to an embodiment of the present invention.

FIG. 6 is a schematic block diagram of an example of a network device according to an embodiment of the present invention.

FIG. 7 is a schematic block diagram of an example of a terminal device according to an embodiment of the present invention.

FIG. 8 is a schematic block diagram of another example of a network device according to an embodiment of the present invention.

FIG. 9 is a schematic block diagram of another example of a terminal device according to an embodiment of the present invention.

Figure 10 is a schematic block diagram of a system chip in accordance with an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

FIG. 1 illustrates a wireless communication system 100 suitable for use with embodiments of the present invention. The wireless communication system 100 can include a network device 100. Network device 100 can be a device that communicates with a terminal device. Network device 100 may provide communication coverage for a particular geographic area and may communicate with terminal devices (e.g., UEs) located within the coverage area. Optionally, the network device 100 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or may be a base station (NodeB, NB) in a WCDMA system, or may be an evolved base station in an LTE system. (Evolutional Node B, eNB or eNodeB), or a wireless controller in a Cloud Radio Access Network (CRAN), or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, A network side device in a future 5G network or a network device in a publicly available Public Land Mobile Network (PLMN) in the future.

The wireless communication system 100 also includes at least one terminal device, such as the first terminal device 120 and the second terminal device 130, located within the coverage of the network device 110. The terminal device can be mobile or fixed. Optionally, the terminal device may refer to an access terminal, a user equipment (User Equipment, UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless communication device. , user agent or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), with wireless communication. Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks, or terminal devices in future evolved PLMNs, and the like.

Alternatively, the 5G system or network may also be referred to as a New Radio (NR) system or network.

FIG. 1 exemplarily shows one network device and two terminal devices. Alternatively, the wireless communication system 100 may include a plurality of network devices and may include within the coverage of each network device. Other embodiments of the present invention are not limited in this embodiment of the present invention.

Optionally, the wireless communication system 100 may further include other network entities, such as a network controller, a mobility management entity, and the like.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be noted that the “first”, “second” and the like in the embodiments of the present invention are only used to distinguish different objects, and should not be construed as limiting the embodiments of the present invention.

It should be noted that the division of the cases, manners, and categories in the embodiments of the present invention is only for convenience of description, and should not be specifically limited. The features in various situations, manners, and categories may be contradictory. Combine.

Before sending the RAR message, the network device first determines the RA-RNTI according to the received random access request message. Accordingly, the terminal device determines the RA-RNTI according to the transmitted random access request message. In other words, the network device and the terminal device respectively determine the RA-RNTI corresponding to the random access request message. First, the manner of determining the RA-RNTI in the prior art will be introduced.

The network device and the terminal device determine the RA-RNTI according to the number of the first subframe occupied by the random access request message and the number of the frequency domain location occupied by the random access request message in the first subframe.

Specifically, the network device and the terminal device may determine the RA-RNTI according to formula (1).

RA-RNTI=1+t_id+10f_id(1)

The t_id is the number of the first subframe occupied by the random access request message, and the f_id is the number of the frequency domain location occupied by the random access request message in the first subframe.

After receiving the random access request message, the network device determines the RA-RNTI according to formula (1), and sends a RAR message according to the RA-RNTI. Accordingly, the terminal device determines the RA-RNTI, and listens to the RA-RNTI according to the RA-RNTI. Your own RAR message. This method increases the complexity of the terminal device acquiring the RAR message.

For example, in the multi-beam multi-beam system, in order to improve the success rate of the terminal device transmitting the random access request message, the terminal device may send a random access request message to the network device through different beams. When the terminal device sends a random access request message in different beams, each beam corresponds to The information of the time domain resource is different (for example, the corresponding first subframe has a different number). At this time, the terminal device needs to try multiple RA-RNTIs when listening to its own RAR message, which causes the terminal device to acquire RARs with high complexity.

For example, in order to improve the success rate of the terminal device transmitting the random access preamble, the terminal device may send multiple random access request messages (multiple random access request messages) on the same time domain resource by using frequency division multiplexing. The random access preambles carried may be the same or different). At this time, the terminal device also needs to try multiple RA-RNTIs when listening to the RAR message belonging to the first terminal device, which causes the terminal device to acquire the RAR message with high complexity.

In order to reduce the complexity of the terminal device acquiring the RAR message, the RA-RNTI may be determined in the following manner.

method one,

The RA-RNTI is determined according to the first resource information of the resource occupied by the random access request message. The first resource information is used to indicate a frequency domain resource or a time domain resource occupied by the random access request message.

For example, the network device and the terminal device can determine the RA-RNTI according to formula (2).

RA-RNTI=t_id+A(2)

Where t_id is the number of the first subframe occupied by the random access request message; A is an adjustment parameter.

For another example, the network device and the terminal device can determine the RA-RNTI according to formula (3).

RA-RNTI=10f_id+B(3)

The f_id is a frequency domain location number occupied by the random access request message in the first subframe occupied by the random access request message, and B is an adjustment parameter.

The manner of determining the RA-RNTI can reduce the complexity of the RAR message obtained by the terminal device. However, the RAR message in the prior art is determined to have its own RAR message. The combination of the methods is easy to cause the terminal device to judge the error.

For example, in a case where the first resource information is used to indicate the frequency domain resource occupied by the random access request message, the network device and the terminal device determine the RA-RNTI according to the first resource information, if both the first terminal device and the second terminal device are The random access request message is sent by the frequency domain resource A, and the random access request message sent by the first terminal device and the second terminal device includes a random access preamble B, and the network device first randomly connects according to the second terminal device. Incoming request message to send RAR message (marked as a second RAR message, the first terminal device and the second terminal device both listen to the second RAR message, where the second RAR message carries information of the random access preamble B (for example, an index of the random access preamble B) . If the RAR message is determined in the prior art, that is, the RAR message belongs to itself according to the index of the random access preamble, the first terminal device may mistake the second RAR message as its own RAR message. And performing related operations by using the information in the second RAR message, causing the first terminal device to process an error.

Similarly, in the case that the first resource information is used to indicate the time domain resource occupied by the random access request message, since the RAR message that is determined to be its own in the prior art has limitations, the terminal device may easily cause an error.

Method 2,

The RA-RNTI is determined according to the first resource information of the resource occupied by the random access request message. The first resource information is used to indicate the frequency domain resource and the time domain resource that are occupied by the random access request message, and the size of the time domain resource indicated by the first resource information in the second mode is larger.

For example, in the second mode, the network device and the terminal device determine the RA-RNTI according to the information of the radio frame occupied by the random access request message (for example, the number of the first radio frame occupied).

The method is capable of balancing the complexity of receiving RAR messages by the terminal device and the number of times the terminal device determines its own RAR. However, because the RAR message in the prior art is determined to have its own limitations, if the second method is combined with the method of determining the RAR message that belongs to the prior art in the prior art, the terminal device may easily make an error. For details, refer to the above. The related descriptions are not repeated here for brevity.

Further, it is assumed that a plurality of terminal devices occupy the same subframe and the frequency domain resource to send the same random access preamble, and after receiving the RAR message of a certain terminal device, the multiple terminal devices perform random connection according to the RAR message. Entering the preamble, the RAR message is considered to belong to itself, and the contention process is performed according to the RAR message. Since the terminal device does not correctly identify the RAR message that belongs to itself, the terminal device may cause meaningless competition.

It can be found by the analysis that determining the RAR message belonging to itself according to the index of the random access preamble in the RAR message in the prior art has limitations, which is disadvantageous for the terminal device to accurately determine the RAR message belonging to itself.

In this regard, an embodiment of the present invention provides a method for random access. The RAR message sent by the network device includes preamble information and indication information, and the terminal device may determine whether the received RAR message is based on the preamble information and the indication information. belong to myself. This method has high compatibility. It is advantageous for the terminal device to accurately determine the RAR message belonging to itself. The method for random access according to an embodiment of the present invention is described in detail below.

2 shows a schematic flow diagram of a method 200 for random access, in accordance with an embodiment of the present invention, as described in terms of device interaction. The method 200 can be applied to a communication system including a network device and at least one terminal device. The communication system may be the wireless communication system 100 shown in FIG. 1.

In the following, without loss of generality, the method according to an embodiment of the present invention is described in detail by taking the interaction between the network device and the first terminal device (and the second terminal device) as an example. It should be understood that the first terminal device is any one of the at least one terminal device, and the “first” is only used to distinguish the description, and should not be construed as limiting the embodiment of the present invention. Similarly, the second terminal device should not constitute any limitation on the embodiments of the present invention.

As shown in FIG. 2, the method 200 includes:

S210: The first terminal device sends a random access request message to the network device, and the network device receives the random access request message sent by the first terminal device, where the random access request message includes a random access preamble.

Optionally, in the embodiment of the present invention, the first terminal device may send an access request message to the network device by using multiple beams.

The location of the starting subframe of the different beams may be different when the terminal device sends the random access request message in a multi-beam manner.

Optionally, in the embodiment of the present invention, after the first terminal device sends the random access request message through one beam, it waits for the RAR message sent by the network device, and if it does not wait for the RAR message sent by the network device, uses another beam to send the random Accessing the request message, and waiting for the RAR message sent by the network device, if receiving the RAR message sent by the network device, stopping sending the random access request message; otherwise, selecting the beam to send the random access request message again.

S220, the network device determines the RA-RNTI according to the random access request message, and accordingly, the first terminal device determines the RA-RNTI according to the random access request message;

S230. The network device sends a RAR message according to the RA-RNTI. Correspondingly, the first terminal device receives the RAR message sent by the network device according to the RA-RNTI, where the RAR message includes indication information and preamble information, where the preamble information is used. Indicating the random access preamble;

Specifically, the network device sends the RAR message according to the RA-RNTI and the random access request message.

S240. The first terminal device determines the RAR according to the indication information and the preamble information. The message belongs to the first terminal device.

For convenience of description, the “random access request message sent by the first terminal device” may be recorded as “first request message”, and “the random access preamble carried by the first random access request message” may be recorded as “first”. The preamble "records the "RA-RNTI determined according to the first request message" as "the first RA-RNTI" and the "RAR message transmitted by the network device according to the first request message" as the "first RAR message".

Specifically, the first terminal device needs to determine whether the received RAR message belongs to the first terminal device.

For example, after the first terminal device sends the first request message, if the indication information carried by the RAR message received by the first terminal device matches the first request message, and the random access preamble indicated by the preamble information carried in the RAR message Like the first preamble, the first terminal device can determine that the RAR message belongs to the first terminal device.

For example, after the first terminal device sends the first request message, if the indication information carried by the RAR message received by the first terminal device does not match the first request message, or the random access preamble indicated by the preamble information carried in the RAR message, The code is different from the first preamble, and the first terminal device may determine that the RAR message does not belong to the first terminal device.

In the embodiment of the present invention, the RAR message not only carries the preamble information but also carries the indication information, compared with the RAR message of the random access preamble in the RAR message. The terminal device determines the RAR message that belongs to the user according to the preamble information and the indication information carried in the RAR message. The method has high compatibility and can be applied to multiple application scenarios, and is beneficial for the first terminal device to accurately determine the RAR that belongs to the user. Message.

Optionally, before S240, the method 200 may further include:

S201. The second terminal device sends a second random access request message to the network device. Correspondingly, the network device receives the second random access request message, and may record the second random access request message as the second request. Message";

S202. The second terminal device determines the RA-RNTI according to the second request message. Correspondingly, the network device determines the RA-RNTI according to the second request message, and may record “the RA-RNTI determined according to the second request message” as “ Second RA-RNTI";

S203. The network device sends a second RAR message according to the second RA-RNTI.

S204. The second terminal device determines, according to the preamble information and the indication information carried in the second RAR message, that the second RAR message is a RAR message that belongs to the user, and the second terminal device stops monitoring. Listen to your own RAR message;

For the first terminal device, the network device sending the second RAR message may include at least the following two situations:

Case 1: The first RA-RNTI and the second RA-RNTI are different, and the first terminal device cannot receive the second RAR message.

Case 2: The first RA-RNTI is the same as the second RA-RNTI, and the first terminal device and the second terminal device may receive the second RAR message, where the first terminal device needs to be according to the indication information in the second RAR message. And the preamble information determines whether the second RAR message belongs to the first terminal device. If the first terminal device determines that the second RAR message belongs to the first terminal device, the first terminal device may process according to the second RAR message; if the first terminal device determines that the second RAR message does not belong to the first A terminal device, the first terminal device needs to continue to listen to RAR messages belonging to the first terminal device.

Specifically, in case two, the method 200 can include:

S205: The first terminal device determines, according to the preamble information and the indication information that is carried by the second RAR message, that the second RAR message does not belong to the first terminal device, and the first terminal device needs to continue to monitor the RAR message that belongs to the first terminal device, where The indication information carried by the second RAR message is different from the indication information corresponding to the first request message.

Specifically, the indication information carried by the RAR message may include at least one of the following types of indication information:

the first sort,

The first type of indication information includes second resource information of resources occupied by the random access request message.

For example, the indication information carried by the first RAR includes the second resource information of the resource occupied by the first request message, and the indication information carried by the second RAR includes the second resource information of the resource occupied by the second request message.

As an optional example, if the RA-RNTI is determined by the method 1, the domain types of the first resource information and the second resource information are different.

For example, the first resource information is used to indicate that the random access request message occupies the frequency domain resource, and the second resource information is used to indicate the time domain resource occupied by the random access request message. That is, the network device and the terminal device determine the RA-RNTI according to the first resource information of the resource occupied by the random access request message, and the first resource information is used to indicate the frequency domain resource occupied by the random access request message, and the second resource information A time domain resource used to indicate that the random access request message is occupied.

Optionally, the second resource information may be used to indicate at least one of a start location of a time domain resource occupied by the random access request message and an end location of a time domain resource occupied by the random access request message.

For example, the second resource information is specifically used to indicate at least one of the following information:

1a. The number of the first subframe occupied by the random access request message;

For example, the indication information carried by the first RAR message includes the second resource information, where the second resource information is used to indicate the number of the first subframe occupied by the first request message, and the second resource information carried by the second RAR message is used for Indicates the number of the first subframe occupied by the second request message.

1b, the number of the first time slot or the first mini time slot occupied by the random access request message;

1c. The number of the last subframe occupied by the random access request message;

1d. The number of the last time slot or the last mini time slot occupied by the random access request message.

For a description of 1b, 1c, and 1d, refer to the related description of 1a, and details are not described herein for brevity.

The frequency domain resource and the time domain resource can be separated by the first type of indication information. For example, determining the RA-RNTI by using the frequency domain resource occupied by the random access request message, and determining the indication information by using the time domain resource occupied by the random access request message, the method may enable the first terminal device to accurately determine the RAR message that belongs to itself. At the same time, the method can reduce the complexity of receiving the RAR message by the first terminal device.

For example, if the indication information includes 1a, the frequency domain resources occupied by the first request message and the second request message are all A, and the first preamble and the second preamble are both B, and the first request message occupies the first. The number of the subframe is N (N ≥ 0), and the number of the first subframe occupied by the second request message is M (M ≥ 0, and M ≠ N), and the network device sends the second request message and then sends the second a RAR message, the second RAR message includes information and a number M of the second preamble B, and the first terminal device and the second terminal device send the random access request message using the same frequency domain resource, the first terminal device and the second terminal device The terminal device can receive (listen to) the second RAR message. Since the number M is different from the number N, the first terminal device determines that the second RAR message does not belong to itself, and the first terminal device continues to listen to the RAR message belonging to itself. If the first terminal device listens to the information including the first preamble B and the first RAR message of the number M, the first terminal device determines that the first RAR message belongs to the first terminal device.

As an optional example, if the RA-RNTI is determined by using the mode 2, the granularity of the resource indicated by the first resource information and the second resource information is different, and the granularity of the resource indicated by the first resource information is greater than The granularity of the resource indicated by the second resource information.

For example, the first resource information is used to indicate that the random access request message (for example, the first request message) occupies a frequency domain resource and a time domain resource, and the second resource information is used to indicate that the random access request message (first request message) is occupied. The time domain resource, the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.

It should be noted that the granularity in the embodiment of the present invention may refer to a unit size of a resource. For example, taking the time domain resource as an example, the granularity of the radio frame is greater than the granularity of the subframe, and the granularity of the subframe is greater than the granularity of the slot. The granularity can also reflect the accuracy of the time domain resource. In other words, the accuracy of the time domain resource indicated by the second resource information is higher than the accuracy of the time domain resource indicated by the first resource information.

For example, the first resource information is used to indicate the information of the radio frame occupied by the random access request message, and the second resource information is used to indicate the information of the subframe occupied by the random access request message.

For another example, the first resource information is used to indicate information about a subframe occupied by the random access request message, and the second resource information is used to indicate information of a time slot (or mini slot) occupied by the random access request message.

The complexity of receiving the RAR message and the number of times the RAR message is received can be balanced by the second type of indication information. Specifically, the first terminal device may first receive a part of the RAR message according to the frequency domain resource occupied by the random access request message and the large-area time domain resource, and may reduce the complexity of receiving the RAR message and the number of times the RAR message is received, the first terminal. The device then determines its own RAR message (ie, the first RAR message) according to the small-grained time domain resource, which is beneficial for the first terminal device to accurately identify the RAR message that belongs to itself.

For example, the first terminal device sends the first request message A, the first request message B, and the third request message C through three beams, and the first request message A, the first request message B, and the third request message C occupy the same frequency. a domain resource and a radio frame, and the first subframes occupied by the three first request messages are numbered 1, 2, and 3, respectively, and the three first request messages correspond to the same RA-RNTI, and the first terminal device may According to the RA-RNTI receiving any one of the three first request messages (without attempting multiple RA-RNTIs), the complexity of receiving the RAR message can be reduced. The second resource information for accurately indicating the time domain resource of the first request message is carried by the first RAR message, which is advantageous for the first terminal device to accurately identify the RAR message belonging to itself.

It should be noted that the smaller the granularity of the time domain resource indicated by the second resource information is, the higher the accuracy is. The higher the accuracy of the RAR message is determined by the terminal device, the efficiency of the random access can be effectively improved, and the efficiency is avoided. Perform a meaningless random competition process.

For example, the frequency domain resource and the starting subframe used by the random access request message are still determined. The RA-RNTI, the indication information included in the first RAR message is the number of the time slot occupied by the first request message, and the method can improve the accuracy of the first terminal device determining the own RAR message, so that the first terminal device can efficiently Perform a random access process.

The second category,

The second type of information indicating that the second resource information occupied by the random access request message is a function value of the variable.

For example, the indication information carried by the first RAR includes information of a function value of the second resource information of the resource occupied by the first request message, and the indication information carried by the second RAR includes the second resource occupied by the second request message. The resource information is information of the function value of the variable.

For example, the second resource information is used to indicate a time domain resource, and the indication information may be used to indicate at least one of the following information:

2a, the difference between the number of the first subframe occupied by the RAR message and the number of the first subframe occupied by the random access request message;

For example, the indication information carried by the first RAR message is used to indicate a difference between the number of the first subframe occupied by the first RAR message and the number of the first subframe occupied by the first request message, and the second RAR message The carried indication information is used to indicate a difference between a number of the first subframe occupied by the second RAR message and a number of the first subframe occupied by the first request message.

2b, the difference between the number of the first time slot occupied by the RAR message and the number of the first time slot occupied by the random access request message, or the number and random number of the first mini time slot occupied by the RAR message The difference between the numbers of the first minislot occupied by the access request message;

2c, the difference between the number of the last subframe occupied by the RAR message and the number of the last subframe occupied by the random access request message;

2d, the difference between the number of the last slot occupied by the RAR message and the number of the last slot occupied by the random access request message, or the number of the last mini slot occupied by the RAR message and the random number The difference between the numbers of the last minislot occupied by the access request message.

For descriptions of 2b, 2c, and 2d, refer to the related description of 2a, and details are not described herein for brevity.

After receiving the RAR message, the first terminal device may determine, according to the indication information in the RAR message, the information of the time domain resource occupied by the random access request message corresponding to the RAR message, and determine the information of the determined time domain resource and send the information by itself. Whether the information of the time domain resource of the random access request message is the same, if the same, determining that the RAR message belongs to itself, if different, determining the RAR cancellation The information does not belong to itself and continues to listen to its own RAR message.

For example, if the indication information includes 2a, the first request message and the second request message occupy the same frequency domain resource A, the first preamble and the second preamble are both B, and the first subframe occupied by the first request message The number is N (N ≥ 0), the number of the first subframe occupied by the second request message is M (M ≥ 0, and M ≠ N), and the network device receives the second request message at the Kth (N ≤ K). And the second RAR message carries the information of the second preamble B and the difference KM, and the first terminal device determines, according to the difference KM, the random connection corresponding to the second RAR message. The number of the first subframe occupied by the incoming request message is M, and the first terminal device may determine that the second RAR message does not belong to the first terminal device. If the first RAR message is received by the first terminal device, the first RAR message carries the information of the first preamble B and the difference KN, and the first terminal device determines, according to the difference KN, the random access corresponding to the second RAR message. The number of the first subframe occupied by the request message is N, and the first terminal device determines that the random access request message corresponding to the first RAR message is the same as the preamble information and the occupied resource information of the first request message. The first terminal device determines that the first RAR message belongs to the first terminal device.

The third category,

The third type of indication information includes information other than the random access preamble carried by the random access request message.

Specifically, the third type of indication information may include at least one of the following information:

Location information of the terminal device;

For example, the first request message carries the location information of the first terminal device, the first RAR carries the location information of the first terminal device, the second request message carries the location information of the second terminal device, and the second RAR carries the second terminal device. Location information.

Identification information of the terminal device;

For example, the first request message carries the identifier information of the first terminal device, the first RAR carries the identifier information of the first terminal device, the second request message carries the identifier information of the second terminal device, and the second RAR carries the second terminal device. Identification information.

Beam information of the terminal device;

The timestamp of the random access request message. For example, the first RAR message carries the sending timestamp of the first request message, and the second RAR message carries the sending timestamp of the second request message.

The sending timestamp may include a sequence of characters, which is used to identify a sending time of the random access request message, and the sending timestamp may also be a specific sending time (for example, 12:15 Beijing time) Minutes 50 seconds). The transmission timestamp may also be part of the information at the time of transmission (eg, 50s).

Optionally, if the RAR message carries the third type of indication information, the msg2 message and the msg3 in the existing LTE system may be fused, which can save signaling overhead and improve the efficiency of random access of the terminal device.

For example, the first request message sent by the first terminal device carries the first preamble and the identifier information of the first terminal device, and if the RAR message received by the first terminal device includes the first preamble and the identifier information, the first The terminal device may determine that the RAR message belongs to the first terminal device, and further, the first terminal device may further determine that the first terminal device competes successfully in the random access process.

In the above, three types of indication information carried by the RAR message are described. Specifically, after receiving the RAR message, the first terminal device determines whether the indication information and the preamble information carried in the RAR message match the random request message sent by the first terminal device. If the matching, the first terminal device determines that the RAR message belongs to itself. A mismatch determines that the RAR message does not belong to itself.

For example, if the random access preamble indicated by the preamble information carried in the RAR message is the same as the first preamble carried in the first request message, the preamble information matches the first request message. Otherwise, it does not match.

For another example, if the indication information includes the resource information, and the resource information is the same as the second resource information of the resource occupied by the first request message, or the indication information includes the second resource information of the resource occupied by the first request message, For example, the resource information included in the indication information is the number of the first subframe occupied by the first request message, and the resource information included in the indication information matches the first request message, and vice versa.

For another example, if the RAR message carries the information of the function value, and the information of the function value is the same as the information of the function value of the variable of the second resource information of the resource occupied by the first request message (or the indication information includes the first request message) The second resource information of the occupied resource is information of a function value of the variable. For example, the information of the function value included in the indication information is the same as the information of the function value determined by the first terminal device according to the first request message and the received RAR message. The information of the function value included in the indication information matches the first request message, and vice versa.

For example, if the indication information includes location information, and the location information is the same as the location information of the first terminal device carried by the first request message (or the indication information includes location information of the first terminal device), the indication information includes The location information matches the first request message, and vice versa.

For another example, if the indication information includes the identifier information, and the identifier information is carried by the first request message The identifier information of the first terminal device is the same (or the indication information includes the identifier information of the first terminal device), and the indication information includes the identifier information that matches the first request message, and vice versa.

For example, if the indication information includes a sending timestamp, and the sending timestamp is the same as the sending timestamp of the first terminal device carried by the first request message, the indication information includes a sending timestamp of the first request message, The indication information includes that the sending timestamp matches the first request message, and vice versa.

It should be noted that, if any one of the indication information and the preamble information does not match the random access request message, the terminal device determines that the RAR message does not belong to itself.

Optionally, the indication information may be carried in a MAC subheader of the RAR message. 3 is a schematic diagram of a MAC subheader suitable for use in an embodiment of the present invention.

As shown in Figure 3, the MAC subheader of the RAR message includes the following fields:

Extended field (E);

Type field (T)

Random access preamble ID (RAPID);

The indication information may be carried in one of the fields included in the MAC subheader.

Optionally, the indication information may be carried in a MAC RAR of the RAR message. 4 is a schematic diagram of an example of a MAC RAR applicable to an embodiment of the present invention. This figure 4 is mainly for the MAC RAR of a normal user. FIG. 5 is a schematic diagram of another example of a MAC RAR applicable to an embodiment of the present invention. This FIG. 5 is mainly for the MAC RAR of the coverage enhanced type user. As shown in FIG. 4 and FIG. 5, the MAC RAR includes at least the following fields:

Reserved bit (R);

Timing Advance Command;

Indicates the resource (UL grant) used when uplink msg3 is sent;

Temporary C-RNTI.

The indication information may be carried in one of the fields included in the MCA RAR. Optionally, the network device may further add an extension field in the MAC RAR, where the extension field is specifically used to carry the indication information.

Therefore, in the prior art, the RAR message carries the indication information and the preamble information in the RID message according to the index of the random access preamble carried in the RAR message. It has high compatibility and can be applied to multiple application scenarios, which is beneficial for the terminal device to accurately determine its own RAR message.

In the above, a method for random access according to an embodiment of the present invention has been described. Hereinafter, a network device, a terminal device, and a system chip according to an embodiment of the present invention will be described in detail with reference to FIGS. 6 to 10.

FIG. 6 is a schematic block diagram of a network device 300 in accordance with an embodiment of the present invention. As shown in FIG. 6, a network device 300 includes:

The receiving unit 310 is configured to receive a random access request message sent by the first terminal device, where the random access request message carries a random access preamble;

The processing unit 320 is configured to determine, according to the random access request message, a random access radio network temporary identifier RA-RNTI;

The sending unit 330 is configured to send, according to the RA-RNTI, a random access response RAR message, where the RAR message carries preamble information and indication information, where the preamble information is used to indicate the random access preamble, the preamble information, and the The first terminal device in the at least one terminal device that receives the RAR message indicates that the RAR message belongs to the first terminal device.

Optionally, the processing unit 320 is configured to: determine the RA-RNTI according to the first resource information of the resource occupied by the random access request message; the indication information includes: a second resource occupied by the random access request message The resource information, the second resource information of the resource occupied by the random access request message, the information of the function value of the variable, and the at least one of the information other than the random preamble carried by the random access request message, The first resource information is different from the second resource information.

Optionally, the first resource information is used to indicate a frequency domain resource that is occupied by the random access request message, and the second resource information is used to indicate a time domain resource occupied by the random access request message.

Optionally, the first resource information is used to indicate a frequency domain resource and a time domain resource that are occupied by the random access request message, where the second resource information is used to indicate a time domain resource occupied by the random access request message, and the The granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.

Optionally, the second resource information is specifically used to indicate at least one of a start location of the time domain resource occupied by the random access request message and an end location of the time domain resource occupied by the random access request message.

Optionally, the second resource information is specifically used to indicate at least one of the following information: a number of the first subframe occupied by the random access request message; and a first time slot occupied by the random access request message Or the number of the first minislot; the number of the last subframe occupied by the random access request message; the last slot or the last minislot occupied by the random access request message number.

Optionally, the information of the function value is used to indicate at least one of the following information: between the number of the first subframe occupied by the RAR message and the number of the first subframe occupied by the random access request message The difference between the number of the first slot occupied by the RAR message and the number of the first slot occupied by the random access request message, or the first minislot occupied by the RAR message The difference between the number and the number of the first minislot occupied by the random access request message; the number of the last subframe occupied by the RAR message and the last subframe occupied by the random access request message The difference between the numbers; the difference between the number of the last slot occupied by the RAR message and the number of the last slot occupied by the random access request message, or the last minislot occupied by the RAR message. The difference between the number and the number of the last minislot occupied by the random access request message.

Optionally, the information that is included in the random access request message except the random preamble includes location information of the first terminal device, identifier information of the first terminal device, and a sending timestamp of the random access request message. At least one of them.

Optionally, the indication information is carried in a medium access control sub-header MAC subheader or MAC RAR of the RAR message.

It should be understood that the network device 300 can correspond to a network device in the method 200 for random access in accordance with an embodiment of the present invention, which can include a unit for performing the method performed by the network device in the above method. In addition, each unit in the network device 300 and the other operations and/or functions described above are respectively used for the corresponding processes of the foregoing method, and are not described herein again for brevity.

FIG. 7 is a schematic block diagram of a terminal device 400 according to an embodiment of the present invention. As shown in FIG. 7, a terminal device is a first terminal device, and the terminal device includes:

The sending unit 410 is configured to send a random access request message to the network device, where the random access request message carries a random access preamble;

The processing unit 420 is configured to determine, according to the random access request message, a random access radio network temporary identifier RA-RNTI;

The receiving unit 430 is configured to receive, according to the RA-RNTI, a random access response (RAR) message sent by the network device, where the RAR message carries preamble information and indication information;

The processing unit 420 is further configured to: determine, according to the random access preamble, the preamble information, and the indication information carried in the random access request message, whether the RAR message belongs to the first terminal device. Optionally, the processing unit 420 is specifically configured to: according to the resource occupied by the random access request message. The resource information determines the RA-RNTI; if the random access preamble indicated by the preamble information is the same as the random access preamble carried by the random access request message, and the indication information includes: the random access request message is occupied The processing unit 420 is at least one of the second resource information of the resource, the information of the function value with the second resource information as a variable, and the information other than the random preamble carried by the random access request message. The method further includes: determining that the RAR message belongs to the first terminal device; wherein the first resource information and the second resource information are different.

Optionally, the second resource information is specifically used to indicate at least one of a start location of the time domain resource occupied by the random access request message and an end location of the frequency domain resource occupied by the random access request message.

Optionally, the second resource information is specifically used to indicate at least one of the following information: a number of the first subframe occupied by the random access request message; and a first time slot occupied by the random access request message Or the number of the first minislot; the number of the last subframe occupied by the random access request message; the number of the last slot or the last minislot occupied by the random access request message.

Optionally, the information that is included in the random access request message except the random preamble includes the At least one of location information of the first terminal device, identification information of the first terminal device, and a transmission timestamp of the random access request message.

Optionally, if the random access preamble indicated by the preamble information is different from the random access preamble carried by the random access request message, or the indication information does not match the random request message, the method further includes: The first terminal device determines that the RAR message does not belong to the first terminal device, where the indication information does not match the random access request message, and includes: the resource information included in the indication information and the resource occupied by the random access request message The second resource information is different; and/or the information of the function value included in the indication information is different from the information of the function value of the second resource information of the resource occupied by the random access request message; and/or the indication information The location information is different from the location information of the first terminal device carried in the random access request message; and/or the identifier information included in the indication information and the identifier information of the first terminal device carried in the random access request message Different; and/or the indication information includes a transmission timestamp that is different from the transmission timestamp carried by the random access request message.

It should be understood that the terminal device 400 may correspond to a first terminal device in the method 200 for random access according to an embodiment of the present invention, and the terminal device 400 may include a method for performing the first terminal device execution in the above method. Unit. In addition, each unit in the terminal device and the other operations and/or functions described above are respectively used for the corresponding processes of the foregoing method, and are not described herein again for brevity.

FIG. 8 is a schematic block diagram of a network device 500 in accordance with an embodiment of the present invention. As shown in FIG. 8, the network device 500 includes a transceiver 510 and a processor 520.

The transceiver 510 is configured to: receive a random access request message sent by the first terminal device, where the random access request message carries a random access preamble; and the processor 520 is configured to: determine, according to the random access request message, the random access The radio network temporary identifier RA-RNTI is further configured to: send a random access response RAR message according to the RA-RNTI, where the RAR message carries preamble information and indication information, where the preamble information and the indication information are used The first terminal device in the at least one terminal device that receives the RAR message determines that the RAR message is an RAR message belonging to the first terminal device, and the preamble information is further used to indicate the random access preamble.

It should be understood that the network device 500 can correspond to a network device in the method 200 for random access in accordance with an embodiment of the present invention, which can include a physical unit for performing the method performed by the network device in the above method. And, each physical unit in the network device and the other operations described above The functions and/or functions are respectively for the corresponding processes of the above methods, and are not described herein for brevity.

FIG. 9 is a schematic block diagram of a terminal device 600 according to an embodiment of the present invention. Specifically, the terminal device 600 is a first terminal device. As shown in FIG. 6, the terminal device 600 includes a transceiver 610 and a processor 620.

The transceiver 610 is configured to: send a random access request message to the network device, where the random access request message carries a random access preamble; the processor 620 is configured to: determine, according to the random access request message, a random access wireless network temporary identifier The RA-RNTI is further configured to: receive, according to the RA-RNTI, a random access response (RAR) message sent by the network device according to the random access request message, where the RAR message carries preamble information and indication information, the preamble The information is used to indicate the random access preamble; the processor 630 is further configured to: determine, according to the preamble information and the indication information, the RAR message as an RAR message belonging to the first terminal device

It should be understood that the terminal device 600 may correspond to a first terminal device in the method 200 for random access according to an embodiment of the present invention, and the terminal device 600 may include a method for performing execution by the first terminal device in the above method. Physical unit. In addition, the physical units in the terminal device and the other operations and/or functions described above are respectively used for the corresponding processes of the foregoing methods, and are not described herein for brevity.

FIG. 10 is a schematic structural diagram of a system chip according to an embodiment of the present invention. The system chip 700 of FIG. 10 includes an input interface 701, an output interface 702, a processor 703, and a memory 704 connected by a bus 705 for executing code in the memory 704.

Optionally, when the code is executed, the processor 703 implements a method performed by a network device in a method embodiment. For the sake of brevity, it will not be repeated here.

Optionally, when the code is executed, the processor 703 implements the method performed by the first device in the method embodiment. For the sake of brevity, it will not be repeated here.

It should be understood that the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software. The processor may be a central processing unit (CPU), the processor may be another general-purpose processor, a digital signal processor (DSP), or an application specific integrated circuit (ASIC). ), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods and steps disclosed in the embodiments of the present invention may be implemented or executed. Logical block diagram. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor. The software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like. The storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It should also be understood that the memory in embodiments of the invention may be a volatile memory or a non-volatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory. Volatile memory can be a random access memory (RAM) that acts as an external cache. By way of example and 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 (SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhancement Synchronous Dynamic Random Access Memory (ESDRAM), Synchronous Connection Dynamic Random Access Memory (SDRAM) and Direct Memory Bus Random Memory (DR RAM). It should be noted that this document describes The memory of the systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.

It should also be understood that the bus system may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for the sake of clarity, the various buses are labeled as bus systems in the figure.

Embodiments of the present invention also provide a computer readable storage medium storing one or more programs, the one or more programs including instructions that are portable electronic devices that include a plurality of applications When executed, the portable electronic device can be enabled to perform the method of an embodiment of the present invention.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the technical solution. Apply application and design constraints. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the embodiments of the invention.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the embodiments of the present invention, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the embodiments of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

This functionality, if implemented as a software functional unit and sold or used as a standalone product, can be stored on a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution, may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method in accordance with various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The foregoing is only a specific embodiment of the embodiments of the present invention, but the scope of protection of the embodiments of the present invention is not limited thereto, and any person skilled in the art can easily use the technical scope disclosed in the embodiments of the present invention. All changes or substitutions are contemplated to be within the scope of the embodiments of the invention. Therefore, the scope of protection of the embodiments of the present invention should be determined by the scope of the claims.

Claims

A method for random access, the method comprising:

Receiving, by the network device, a random access request message sent by the first terminal device, where the random access request message carries a random access preamble;

Determining, by the network device, a random access radio network temporary identifier RA-RNTI according to the random access request message;

And the network device sends a random access response RAR message according to the RA-RNTI, where the RAR message carries preamble information and indication information, where the preamble information is used to indicate the random access preamble, the preamble The information and the indication information are used by the first terminal device in the at least one terminal device that receives the RAR message to determine that the RAR message belongs to the first terminal device.
The method according to claim 1, wherein the determining, by the network device, the random access radio network temporary identifier RA-RNTI according to the random access request message comprises:

Determining, by the network device, the RA-RNTI according to the first resource information of the resource occupied by the random access request message;

The indication information includes: second resource information of a resource occupied by the random access request message, information of a function value of a second resource information of a resource occupied by the random access request message, and the random value At least one of the information other than the random preamble carried by the access request message, where the first resource information and the second resource information are different.
The method according to claim 2, wherein the first resource information is used to indicate a frequency domain resource occupied by the random access request message, and the second resource information is used to indicate the random access request. The time domain resource occupied by the message.
The method according to claim 2, wherein the first resource information is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource information is used to indicate the The time domain resource occupied by the random access request message, and the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.
The method according to claim 3 or 4, wherein the second resource information is specifically used to indicate a start position of a time domain resource occupied by the random access request message and the random access request message is occupied. At least one of the end positions of the time domain resources.
The method according to any one of claims 3 to 5, wherein the second resource information is specifically used to indicate at least one of the following information:

The number of the first subframe occupied by the random access request message;

The number of the first time slot or the first mini time slot occupied by the random access request message;

The number of the last subframe occupied by the random access request message;

The number of the last time slot or the last mini time slot occupied by the random access request message.
The method according to any one of claims 3 to 5, characterized in that the information of the function value is used to indicate at least one of the following information:

a difference between a number of the first subframe occupied by the RAR message and a number of the first subframe occupied by the random access request message;

a difference between a number of a first time slot occupied by the RAR message and a number of a first time slot occupied by the random access request message, or a first mini time slot occupied by the RAR message And a difference between a number and a number of the first minislot occupied by the random access request message;

a difference between a number of a last subframe occupied by the RAR message and a number of a last subframe occupied by the random access request message;

a difference between a number of a last slot occupied by the RAR message and a number of a last slot occupied by the random access request message, or a number and a last mini slot occupied by the RAR message The difference between the numbers of the last minislot occupied by the random access request message.
The method according to any one of claims 2 to 7, wherein the information other than the random preamble carried by the random access request message includes location information and location of the first terminal device. At least one of identification information of the first terminal device and a transmission time stamp of the random access request message.
The method according to any one of claims 1 to 8, wherein the indication information is carried in a medium access control subheader MAC subheader or MACRAR of the RAR message.
A method for random access, the method comprising:

The first terminal device sends a random access request message to the network device, where the random access request message carries a random access preamble;

Determining, by the first terminal device, a random access radio network temporary identifier RA-RNTI according to the random access request message;

Receiving, by the first terminal device, the random connection sent by the network device according to the RA-RNTI In response to the RAR message, the RAR message carries preamble information and indication information;

Determining, by the first terminal device, that the RAR message belongs to the first terminal device according to the random access preamble, the preamble information, and the indication information that are carried in the random access request message.
The method according to claim 10, wherein the receiving, by the first terminal device, the random access response RAR message sent by the network device according to the RA-RNTI comprises:

Determining, by the first terminal device, the RA-RNTI according to the first resource information of the resource occupied by the random access request message;

If the random access preamble indicated by the preamble information is the same as the random access preamble carried by the random access request message, and the indication information includes: a second resource occupied by the random access request message The resource information, the information of the function value of the second resource information of the resource occupied by the random access request message, and the information of the random access preamble and the information other than the random preamble carried by the random access request message One kind,

The method further includes:

Determining, by the first terminal device, that the RAR message belongs to the first terminal device;

The first resource information and the second resource information are different.
The method according to claim 11, wherein the first resource information is used to indicate a frequency domain resource occupied by the random access request message, and the second resource information is used to indicate the random access request. The time domain resource occupied by the message.
The method according to claim 11, wherein the first resource information is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource information is used to indicate the The time domain resource occupied by the random access request message, and the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.
The method according to claim 12 or 13, wherein the second resource information is specifically used to indicate that a start location of a time domain resource occupied by the random access request message and the random access request message are occupied. At least one of the end positions of the time domain resources.
The method according to any one of claims 12 to 14, wherein the second resource information is specifically used to indicate at least one of the following information:

The number of the first subframe occupied by the random access request message;

The number of the first time slot or the first mini time slot occupied by the random access request message;

The number of the last subframe occupied by the random access request message;

The number of the last time slot or the last mini time slot occupied by the random access request message.
The method according to any one of claims 12 to 15, wherein the information of the function value is used to indicate at least one of the following information:

a difference between a number of the first subframe occupied by the RAR message and a number of the first subframe occupied by the random access request message;

a difference between a number of a first time slot occupied by the RAR message and a number of a first time slot occupied by the random access request message, or a first mini time slot occupied by the RAR message And a difference between a number and a number of the first minislot occupied by the random access request message;

a difference between a number of a last subframe occupied by the RAR message and a number of a last subframe occupied by the random access request message;

a difference between a number of a last slot occupied by the RAR message and a number of a last slot occupied by the random access request message, or a number and a last mini slot occupied by the RAR message The difference between the numbers of the last minislot occupied by the random access request message.
The method according to any one of claims 11 to 16, wherein the information other than the random preamble carried by the random access request message includes location information and location of the first terminal device. At least one of identification information of the first terminal device and a transmission time stamp of the random access request message.
The method according to any one of claims 10 to 17, wherein the indication information is carried in a medium access control subheader MAC subheader or MAC RAR of the RAR message.
The method according to any one of claims 10 to 18, wherein if the random access preamble indicated by the preamble information is different from the random access preamble carried by the random access request message, or The indication information does not match the random request message, and the method further includes:

Determining, by the first terminal device, that the RAR message does not belong to the first terminal device;

The indication information does not match the random access request message, and includes:

The resource information included in the indication information is different from the second resource information of the resource occupied by the random access request message; and/or

The information indicating the function value included in the indication information is different from the information of the function value in which the second resource information of the resource occupied by the random access request message is a variable; and/or

The location information included in the indication information is different from the location information of the first terminal device carried in the random access request message; and/or

The indication information included in the indication information is different from the identifier information of the first terminal device carried in the random access request message; and/or

The indication information includes a sending timestamp that is different from a sending timestamp carried by the random access request message.
A network device, where the network device includes:

a receiving unit, configured to receive a random access request message sent by the first terminal device, where the random access request message carries a random access preamble;

a processing unit, configured to determine, according to the random access request message, a random access radio network temporary identifier RA-RNTI;

a sending unit, configured to send, according to the RA-RNTI, a random access response RAR message, where the RAR message carries preamble information and indication information, where the preamble information is used to indicate the random access preamble, the preamble The code information and the indication information are used by the first terminal device in the at least one terminal device that receives the RAR message to determine that the RAR message belongs to the first terminal device.
The network device according to claim 20, wherein the processing unit is configured to: determine the RA-RNTI according to the first resource information of the resource occupied by the random access request message;

The indication information includes: second resource information of a resource occupied by the random access request message, information of a function value of a second resource information of a resource occupied by the random access request message, and the random value At least one of the information other than the random preamble carried by the access request message, where the first resource information and the second resource information are different.
The network device according to claim 21, wherein the first resource information is used to indicate a frequency domain resource occupied by the random access request message, and the second resource information is used to indicate the random access The time domain resource occupied by the request message.
The network device according to claim 21, wherein the first resource information is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource information is used to indicate a location The time domain resource occupied by the random access request message is used, and the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.
A network device according to claim 22 or 23, wherein said second asset The source information is specifically used to indicate at least one of a start location of a time domain resource occupied by the random access request message and an end location of a time domain resource occupied by the random access request message.
The network device according to any one of claims 22 to 24, wherein the second resource information is specifically used to indicate at least one of the following information:

The number of the first subframe occupied by the random access request message;

The number of the first time slot or the first mini time slot occupied by the random access request message;

The number of the last subframe occupied by the random access request message;

The number of the last time slot or the last mini time slot occupied by the random access request message.
The network device according to any one of claims 22 to 25, wherein the information of the function value is used to indicate at least one of the following information:

a difference between a number of the first subframe occupied by the RAR message and a number of the first subframe occupied by the random access request message;

a difference between a number of a first time slot occupied by the RAR message and a number of a first time slot occupied by the random access request message, or a first mini time slot occupied by the RAR message And a difference between a number and a number of the first minislot occupied by the random access request message;

a difference between a number of a last subframe occupied by the RAR message and a number of a last subframe occupied by the random access request message;

a difference between a number of a last slot occupied by the RAR message and a number of a last slot occupied by the random access request message, or a number and a last mini slot occupied by the RAR message The difference between the numbers of the last minislot occupied by the random access request message.
The network device according to any one of claims 21 to 26, wherein the information other than the random preamble carried by the random access request message includes location information of the first terminal device, At least one of the identification information of the first terminal device and the transmission timestamp of the random access request message.
The network device according to any one of claims 20 to 27, wherein the indication information is carried in a medium access control subheader MAC subheader or MAC RAR of the RAR message.
A terminal device, wherein the terminal device is a first terminal device, and the terminal device includes:

a sending unit, configured to send a random access request message to the network device, where the random access request message carries a random access preamble;

a processing unit, configured to determine, according to the random access request message, a random access radio network temporary identifier RA-RNTI;

a receiving unit, configured to receive, according to the RA-RNTI, a random access response RAR message sent by the network device, where the RAR message carries preamble information and indication information;

The processing unit is further configured to: determine, according to the random access preamble, the preamble information, and the indication information that are included in the random access request message, whether the RAR message belongs to the first terminal device.
The terminal device according to claim 29, wherein the processing unit is configured to determine the RA-RNTI according to the first resource information of the resource occupied by the random access request message;

If the random access preamble indicated by the preamble information is the same as the random access preamble carried by the random access request message, and the indication information includes: a second resource occupied by the random access request message At least one of resource information, information of a function value having the second resource information as a variable, and information other than the random preamble carried by the random access request message,

The processing unit is further configured to: determine that the RAR message belongs to the first terminal device;

The first resource information and the second resource information are different.
The terminal device according to claim 30, wherein the first resource information is used to indicate a frequency domain resource occupied by the random access request message, and the second resource information is used to indicate the random access The time domain resource occupied by the request message.
The terminal device according to claim 30, wherein the first resource information is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource information is used to indicate a location The time domain resource occupied by the random access request message is used, and the granularity of the time domain resource indicated by the first resource information is greater than the granularity of the time domain resource indicated by the second resource information.
The terminal device according to claim 31 or 32, wherein the second resource information is specifically used to indicate a start location of a time domain resource occupied by the random access request message and the random access request message. At least one of the end positions of the occupied frequency domain resources.
The terminal device according to any one of claims 31 to 33, wherein the second resource information is specifically used to indicate at least one of the following information:

The number of the first subframe occupied by the random access request message;

The number of the first time slot or the first mini time slot occupied by the random access request message;

The number of the last subframe occupied by the random access request message;

The number of the last time slot or the last mini time slot occupied by the random access request message.
The terminal device according to any one of claims 31 to 34, wherein the information of the function value is used to indicate at least one of the following information:

a difference between a number of the first subframe occupied by the RAR message and a number of the first subframe occupied by the random access request message;

a difference between a number of a first time slot occupied by the RAR message and a number of a first time slot occupied by the random access request message, or a first mini time slot occupied by the RAR message And a difference between a number and a number of the first minislot occupied by the random access request message;

a difference between a number of a last subframe occupied by the RAR message and a number of a last subframe occupied by the random access request message;

a difference between a number of a last slot occupied by the RAR message and a number of a last slot occupied by the random access request message, or a number and a last mini slot occupied by the RAR message The difference between the numbers of the last minislot occupied by the random access request message.
The terminal device according to any one of claims 30 to 35, wherein the information other than the random preamble carried by the random access request message includes location information of the first terminal device, At least one of the identification information of the first terminal device and the transmission timestamp of the random access request message.
The terminal device according to any one of claims 29 to 36, wherein the indication information is carried in a medium access control sub-header MAC subheader or MAC RAR of the RAR message.
The terminal device according to any one of claims 29 to 37, wherein if the random access preamble indicated by the preamble information is different from the random access preamble carried by the random access request message, Or the indication information does not match the random request message, and the processing unit is further configured to: determine that the RAR message does not belong to the first terminal device;

The indication information does not match the random access request message, and includes:

The resource information included in the indication information and the resource occupied by the random access request message The second resource information is different; and/or

The information indicating the function value included in the indication information is different from the information of the function value in which the second resource information of the resource occupied by the random access request message is a variable; and/or

The location information included in the indication information is different from the location information of the first terminal device carried in the random access request message; and/or

The indication information included in the indication information is different from the identifier information of the first terminal device carried in the random access request message; and/or

The indication information includes a sending timestamp that is different from a sending timestamp carried by the random access request message.