TW201822573A - Method for random access, network equipment and terminal equipment - Google Patents

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 equipment and terminal equipment for random access

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

In an existing Long Term Evolution (LTE) system, when a network device receives a random access request message sent by a terminal device, the network device will be on a Physical Downlink Shared CHannel (PDSCH) Send a Random Access Response (RAR) message, where the random access request message carries a random access preamble. The RAR message carries the index of the random access preamble, the time adjustment message for uplink synchronization, the initial uplink resource configuration (for sending subsequent msg3) messages, and a temporary community wireless network temporary identity (Cell-Radio Network Temporary Identifier (C-RNTI).

After the terminal device sends a random access request message, it needs to use a Random Access-Radio Network Temporary Identifier (RA-RNTI) to monitor the Physical Downlink Control Channel (PDCCH) for use in Receive your own RAR message. If the random access preamble indicated by the index carried in 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 it and performs corresponding operations according to the message carried in the RAR message.

However, using this method to determine the RAR message that belongs to it has greater limitations, which is not conducive to the terminal device accurately determining the RAR message that belongs to it.

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 to the terminal device to accurately determine its own RAR message.

In a first aspect, a method for random access is provided. The method includes: 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 The wireless device determines a random access wireless network temporary identity RA-RNTI according to the random access request message; the network device sends a random access response RAR message according to the RA-RNTI, and the RAR message carries a preamble message and an instruction message, The preamble message is used to indicate the random access preamble, and the preamble message and the indication message are used by the first terminal device among at least one terminal device that received the RAR message to determine that the RAR message belongs to the first terminal device.

Compared with the prior art, which only determines the RAR message that belongs to itself based on the index of the random access preamble carried in the RAR message, in this solution, the first terminal device determines the RAR message that belongs to itself according to the indication message and the preamble message. The method has high compatibility, which is beneficial for the first terminal device to accurately determine its own RAR message, so that the first terminal device can efficiently perform a random access process.

In a possible implementation manner of the first aspect, the network device determining the RA-RNTI according to the random access request message includes: the network device determining the RA according to a first resource message of a resource occupied by the random access request message. -RNTI; the indication message includes: a second resource message of the resource occupied by the random access request message, a message using the second resource message of the resource occupied by the random access request message as a function value of a variable, and the random access request The incoming request message carries at least one of messages other than the random preamble, wherein the first resource message and the second resource message are different.

The instruction message may include multiple types of messages. This solution is highly flexible, so that the terminal device can efficiently determine the RAR message that belongs to it according to the instruction message.

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

Compared with the prior art, which determines the RA-RNTI based on the information of the frequency domain resources and the information of the time domain resources occupied by the random access request message, in this solution, the network device and the first terminal device can The first resource information of the frequency domain resources occupied by the message determines the RA-RNTI, and the second resource information of the time domain resources occupied by the random access request message is sent to the first terminal device through the RAR message, which can reduce the first terminal device to obtain RA. -The complexity of the RNTI, and at the same time enable the first terminal device to accurately determine its own RAR message.

In a possible implementation manner of the first aspect, the first resource message is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource message is used to indicate a frequency occupied by the random access request message. A time domain resource, and the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message.

In this solution, although the first resource information indicates both time-domain resources and frequency-domain resources, the time-domain resources indicated by the first resource information are more subtle and can reduce the complexity of the RA-RNTI obtained by the first terminal device. The nuance of the time domain resource indicated by the second resource is small, so that the first terminal device can accurately determine the RAR message that belongs to it. This solution can balance the complexity of the RAR message received by the terminal device and the number of times the terminal device determines that the RAR message belongs to it.

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

In this solution, the second resource information can indicate the start position and / or the end position. This solution has high flexibility and high compatibility and applicability.

In a possible implementation manner of the first aspect, the second resource message 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 number of the first time slot or the first mini time slot; the number of the last sub frame 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 .

In a possible implementation manner of the first aspect, the message of the function value is used to indicate at least one of the following messages: a number of a first subframe occupied by the RAR message and a first subframe occupied by the random access request message The difference between the frame numbers; 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 first time slot occupied by the RAR message The difference between the number of a mini-slot and the number of the first mini-slot occupied by the random access request message; the number of the last subframe occupied by the RAR message and the number occupied by the random access request message The difference between the number 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 difference between the number of the last slot occupied by the random access request message The difference between the number of the last mini-slot and the number of the last mini-slot occupied by the random access request message.

In a possible implementation manner of the first aspect, information other than the random preamble carried in the random access request message includes location information of the first terminal device, identification information of the first terminal device, and the random access At least one of the sending timestamps of the request message.

This solution not only enables the first terminal device to accurately determine its own RAR message, further, the solution can fuse the msg2 message and msg3 in the LTE system, which can save signal overhead and improve the efficiency of random access by the terminal device.

In a possible implementation manner of the first aspect, the indication message is carried in a media access control subheader MAC subheader or MAC RAR of the RAR message.

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

In a second aspect, a method for random access is provided. The method includes: a first terminal device sending a random access request message to a network device, the random access request message carrying a random access preamble; the first terminal The device determines a random access wireless network temporary identity RA-RNTI according to the random access request message; the first terminal device receives a random access response RAR message sent by the network device according to the RA-RNTI, and the RAR message carries a preamble Code message and indication message; the first terminal device determines whether the RAR message belongs to the first terminal device according to the random access preamble, the preamble message, and the indication message carried in the random access request message.

Compared with the prior art, which only determines the RAR message that belongs to itself based on the index of the random access preamble carried by the RAR message, in this solution, the first terminal device determines the RAR message that belongs to itself according to the indication message and the preamble message, which can Improve the accuracy of the first terminal device determining its own RAR message, so that the terminal device can efficiently perform random access.

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

The first terminal device determines its own RAR message according to the preamble message and the instruction message, so that the first terminal device can efficiently determine its own RAR message.

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

Compared with the prior art, which determines the RA-RNTI based on the frequency domain resource information and time domain resource information occupied by the random access request message, in this solution, the first terminal device may determine the RA-RNTI based on the frequency occupied by the random access request message. The first resource message of the domain resource determines the RA-RNTI, and the second resource message of the time domain resource occupied by the random access request message is sent to the first terminal device through the RAR message, which can reduce the complexity of the first terminal device acquiring the RA-RNTI. At the same time, the accuracy of the first terminal device determining the RAR message belonging to itself can be improved.

In a possible implementation manner of the second aspect, the first resource message is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource message is used to indicate a frequency occupied by the random access request message. A time domain resource, and the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message.

Although the first resource message indicates both the time domain resource and the frequency domain resource, the time domain resource indicated by the first resource message has a larger granularity, which can reduce the complexity of obtaining the RA-RNTI by the first terminal device, and can improve the Efficiency of a terminal device receiving its own RAR message. This solution can balance the complexity of the RAR message received by the terminal device and the number of times the terminal device determines that the RAR message belongs to it.

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

In a possible implementation manner of the second aspect, the second resource message 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; the number of the last sub frame 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 .

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

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

This solution can not only improve the accuracy of the terminal equipment determining its own RAR message. Furthermore, this solution can fuse the msg2 message and msg3 in the LTE system, which can save signal overhead and improve the efficiency of random access of terminal equipment.

In a possible implementation manner of the second aspect, the indication message is carried in a media access control subheader MAC subheader or a MAC RAR of the RAR message.

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

In a possible implementation manner of the second aspect, if the random access preamble indicated by the preamble message is different from the random access preamble carried in the random access request message, or the indication message 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; wherein the indication message does not match the random access request message, including: the resource information included in the indication message and the random access request 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 message is different from the information of the function value using the second resource information of the resource occupied by the random access request message as a variable; And / or the location information included in the instruction message is different from the location information of the first terminal device carried in the random access request message; and / or the identification message included in the instruction message and the first information 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 message and the sending time carried in the random access request message The stamp is different.

In a third aspect, a network device is provided for performing the first aspect or the method in any possible implementation manner of the first aspect. Specifically, the network device may include a module and / or unit for performing the foregoing first aspect or the method in any possible implementation manner of the first aspect.

In a fourth aspect, a terminal device is provided for performing the second aspect or the method in any possible implementation manner of the second aspect. Specifically, the terminal device may include a module and / or a unit for executing the second aspect or the method in any possible implementation manner of the second aspect.

According to a fifth aspect, a network device is provided, including: a transceiver, a memory, and a processor, the transceiver is used to send and receive signals, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and Execution of the instructions stored in the memory causes the processor to execute the method in the first aspect or any possible implementation manner of the first aspect.

According to a sixth aspect, a terminal device is provided, including a transceiver, a memory, and a processor. The transceiver is used to send and receive signals. The memory is used to store instructions. The processor is used to execute the instructions stored in the memory. Execution of the instructions stored in the memory causes the processor to execute the method in the second aspect or any possible implementation manner of the second aspect.

According to a seventh aspect, a computer storage medium is provided, and the computer storage medium stores program code, where the program code is used to instruct the execution of the instructions in the first aspect or any possible implementation manner of the first aspect.

According to an eighth aspect, a computer storage medium is provided, and the computer storage medium stores program code, where the program code is used to instruct to execute the instructions in the second aspect or any possible implementation manner of the second aspect.

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

According to a tenth aspect, a system chip is provided. The system chip includes an input interface, an output interface, a processor, and a memory. The processor is configured to execute code in the memory. When the code is executed, the processor can implement the system chip. The aforementioned second aspect and methods in various implementations.

Therefore, in the embodiment of the present invention, the RAR message may carry an indication message and a preamble message, and the indication message may include a second resource message of a resource occupied by the follow-up access request message, and the random access request message by the follow-up The second resource message of the occupied resource is at least one of a variable function value message and a message other than the random preamble carried in the random access request message, so that the first terminal device may use the instruction message and The preamble message accurately determines its own RAR message.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention.

FIG. 1 shows a wireless communication system 100 applicable to an embodiment of the present invention. The wireless communication system 100 may include a network device 110. The network device 110 may be a device that communicates with a terminal device. The network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices (such as UEs) located within the coverage area. Optionally, the network device 110 may be a base station in a Global System of Mobile communication ("GSM") system or a Code Division Multiple Access ("CDMA") system (Base Transceiver Station, BTS), or a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or 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 may be a relay station, an access point, an in-vehicle device, or a wearable Equipment, network-side equipment in future 5th-generation mobile communication technology (5th-Generation, 5G) networks, or network equipment in public land mobile networks (PLMN) that are evolving in the future.

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

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

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the wireless communication system 100 may include multiple network devices and each network device may include other numbers of terminals within its coverage area. Equipment, which is not limited in the embodiment of the present invention.

Optionally, the wireless communication system 100 may further include other network entities, such as a network controller and a mobile management entity, which are not limited in this embodiment of the present invention.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and / or" in this article is only a kind of association relationship describing related objects. It means that there can be three kinds of relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. three conditions. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

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

It should also be noted that the division of the situations, methods, and categories in the embodiments of the present invention is only for convenience of description, and should not constitute a special limitation. Features in various situations, modes, and categories can be compared without conflict. Combined.

Before sending a 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 random access request message sent. 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 is introduced.

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

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

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

Among them, t_id is the number of the first subframe occupied by the random access request message, and f_id is the number of the frequency domain position 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 monitors according to the RA-RNTI. Own RAR message. This method will increase the complexity of obtaining the RAR message by the terminal device.

For example, in a multi-beam system, in order to improve the success rate of a terminal device sending a 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, the information of the time domain resources corresponding to each beam is different (for example, the corresponding first subframes have different numbers). At this time, the terminal device needs to try multiple RA-RNTIs while listening to its own RAR message, which results in high complexity for the terminal device to obtain the RAR.

For another example, in order to improve the success rate of sending random access preamble by the terminal device, the terminal device may use frequency division multiplexing to send multiple random access request messages (multiple random access request messages) on the same time domain resource. The random access preambles carried may be the same or different). At this time, when the terminal device listens to the RAR message belonging to the first terminal device, it also needs to try multiple RA-RNTIs, which results in a high degree of complexity for the terminal device to obtain the RAR message.

To reduce the complexity of obtaining RAR messages by the terminal device, 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 resources occupied by the random access request message. The first resource message is used to indicate a frequency domain resource or a time domain resource occupied by the random access request message.

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

RA-RNTI = t_id + A (2)

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

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

RA-RNTI = 10f_id + B (3)

Among them, f_id is the frequency domain position 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.

Determining the RA-RNTI in this way can reduce the complexity of obtaining RAR messages by the terminal device. However, determining the own RAR message in the prior art has limitations. If the first way is compared with the way in the prior art to determine the own RAR message, Combining, it is easy to cause the terminal equipment to make a judgment error.

For example, when the first resource message is used to indicate the frequency domain resources occupied by the random access request message, the network device and the terminal device determine the RA-RNTI according to the first resource message. If the first terminal device and the second terminal device Both occupy the frequency domain resource C to send a random access request message, and the random access request message sent by the first terminal device and the second terminal device includes a random access preamble D, and the network device first sends the random access request message D according to the The random access request message sends an RAR message (recorded as a second RAR message), and both the first terminal device and the second terminal device listen to the second RAR message, and the second RAR message carries a message of a random access preamble D ( For example, the random access index of the preamble D). If the manner of determining the RAR message in the prior art is still used (that is, the RAR message belonging to itself is determined only based on the index of the random access preamble), the first terminal device will mistakenly believe that the second RAR message is its own RAR message, and The information in the second RAR message is used to perform related operations, which causes the processing error of the first terminal device.

Similarly, in the case where the first resource message is used to indicate the time domain resources occupied by the random access request message, the RAR message determined to be its own in the prior art has limitations, and it is easy to cause the terminal device to make an error in judgment.

Way two,

The RA-RNTI is determined according to the first resource information of the resources occupied by the random access request message. The first resource message is used to indicate the frequency domain resources and time domain resources occupied by the random access request message, and the time domain resources indicated by the first resource message in the second method are more delicate.

For example, in mode two, 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).

This method can balance the complexity of the RAR message received by the terminal device and the number of times the terminal device determines its own RAR. However, due to the limitation of determining the own RAR message in the prior art, if the second method is combined with the method of determining the own RAR message in the prior art, it is easy to cause the terminal device to make an error. For details, refer to the related description above. The description is not repeated here for brevity.

Further, it is assumed that multiple terminal devices occupy the same subframe and frequency domain resources and send the same random access preamble. After receiving the RAR message of a terminal device, the multiple terminal devices receive the random access carried by the RAR message. The preamble will consider that the RAR message belongs to itself, and perform a competition process according to the RAR message. Because the terminal device does not correctly identify its own RAR message, it will cause the terminal device to perform meaningless competition.

Through analysis, it can be found that using the prior art to determine only the RAR message that belongs to it based on the index of the random access preamble in the RAR message has limitations, which is not conducive to the terminal device accurately determining the RAR message that belongs to it.

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

FIG. 2 shows a schematic flowchart of a method 200 for random access according to an embodiment of the present invention, which is described from the perspective of device interaction. The method 200 may 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.

Hereinafter, without loss of generality, the method according to the embodiment of the present invention will be described in detail by taking the interaction between a network device and a first terminal device (and a second terminal device) as an example. It should be understood that the first terminal device is any one of at least one terminal device, and "first" is only used for distinguishing descriptions, and should not be construed as any limitation in the embodiments of the present invention. Similarly, the second terminal device should not constitute any limitation in 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. Correspondingly, the network device receives the random access request message sent by the first terminal device. 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 in a multi-beam manner.

When the terminal device sends a random access request message in a multi-beam manner, the positions of the start subframes of different beams may be different.

Optionally, in the embodiment of the present invention, after the first terminal device sends a random access request message through one beam, it waits for the RAR message sent by the network device. If it does not wait for the RAR message sent by the network device, another beam is used. Send the random access request message and wait for the RAR message sent by the network device. If the RAR message sent by the network device is received, stop sending the random access request message; otherwise, select 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. 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. Accordingly, the first terminal device receives the RAR message sent by the network device according to the RA-RNTI. The RAR message includes an indication message and a preamble message. The preamble message Used to indicate the random access preamble;

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

S240. The first terminal device determines that the RAR message belongs to the first terminal device according to the instruction message and the preamble message.

For convenience of explanation, the “random access request message sent by the first terminal device” may be recorded as a “first request message”, and the “random access preamble carried by the first random access request message” may be recorded as “first "Preamble", "RA-RNTI determined according to the first request message" is recorded as "first RA-RNTI", and "RAR message sent by the network device according to the first request message" is recorded as "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 message carried in the RAR message received by the first terminal device matches the first request message, and the random access preamble indicated by the preamble message carried in the RAR message Same as the first preamble, the first terminal device may determine that the RAR message belongs to the first terminal device.

For another example, after the first terminal device sends the first request message, if the indication message carried in 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 message 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.

Compared with the prior art, a terminal device determines its own RAR message based only on the index of the random access preamble in the RAR message. In the embodiment of the present invention, the RAR message carries not only the preamble message but also the indication message. The first terminal The device determines its own RAR message according to the preamble information and the instruction message carried by the RAR message. This method has high compatibility, can be applied to a variety of application scenarios, and helps the first terminal device accurately determine its own RAR 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, when the network device receives the second random access request message, the "second random access request message" may be recorded as "the first Two request messages ";

S202. The second terminal device determines the RA-RNTI according to the second request message. Accordingly, the network device determines the RA-RNTI according to the second request message. The RA-RNTI determined according to the second request message may be recorded 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 that the second RAR message is its own RAR message according to the preamble information and the indication message carried in the second RAR message, and the second terminal device stops monitoring the 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 two, the first RA-RNTI and the second RA-RNTI are the same, and both the first terminal device and the second terminal device can receive the second RAR message, and the first terminal device needs to follow the instruction message in the second RAR message And the preamble message determine 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 can process according to the second RAR message; if the first terminal device determines that the second RAR message does not belong to the first terminal device A terminal device, the first terminal device needs to continue to monitor RAR messages belonging to the first terminal device.

Specifically, in the second case, the method 200 may include:

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

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

the first sort,

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

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

As an optional example, if the RA-RNTI is determined in the first manner, the domain types of the first resource message and the second resource message are different.

For example, the first resource message is used to indicate that the random access request message occupies frequency domain resources, and the second resource message is used to indicate the time domain resources 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 message of the resource occupied by the random access request message, and the first resource message is used to indicate the frequency domain resource occupied by the random access request message, and the second resource The message is used to indicate the time domain resources occupied by the random access request message.

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

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

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

For example, the indication message carried in the first RAR message includes a second resource message, which is used to indicate the number of the first subframe occupied by the first request message; the second resource message carried in 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 the descriptions of 1b, 1c, and 1d, refer to the related description of 1a.

The first type of indication message can separate frequency domain resources and time domain resources. For example, the RA-RNTI is determined by using the frequency domain resources occupied by the random access request message, and the indication information is determined by using the time domain resources occupied by the random access request message. This method enables 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, taking the indication message including 1a as an example, the frequency domain resources occupied by the first request message and the second request message are both C, the first preamble and the second preamble are both D, and the first request message occupies the first The number of each 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). After receiving the second request message, the network device sends the first Two RAR messages. The second RAR message includes a second preamble D message and a number M. Since the first terminal device and the second terminal device use the same frequency domain resource to send a random access request message, the first terminal device and the first terminal device Both terminal devices can receive (listen to) the second RAR message. Because 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 monitor the RAR message that belongs to itself. If the first terminal device monitors the first RAR message including the message of the first preamble D and the number M, the first terminal device determines that the first RAR message belongs to the first terminal device.

As another optional example, if the RA-RNTI is determined by using the second method, the nuances of the resources indicated by the first resource message and the second resource message are different, and the nuances of the resource indicated by the first resource message are greater than those indicated by the second resource message. The nuance of the resource.

For example, the first resource message is used to indicate that a random access request message (eg, the first request message) occupies frequency domain resources and time domain resources, and the second resource message is used to indicate that the random access request message (first request message) occupies For the time domain resource, the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message.

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

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

For another example, the first resource message is used to indicate the subframe occupied by the random access request message, and the second resource message is used to indicate the timeslot (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 message. Specifically, the first terminal device may first receive a part of the RAR message according to the frequency domain resources occupied by the random access request message and the time domain resources with great detail, which may reduce the complexity of receiving the RAR message and the number of times that the RAR message is received. The terminal device then determines its own RAR message (that is, the first RAR message) according to the small and subtle time domain resources, which is beneficial to the first terminal device to accurately identify the RAR message that belongs to it.

For example, the first terminal device sends the first request message E, the second request message F, and the third request message G through three beams, and the first request message E, the second request message F, and the third request message G occupy the same frequency. Domain resources and radio frames, and the numbers of the first subframes occupied by the three request messages are 1, 2, and 3 respectively. The three request messages correspond to the same RA-RNTI. The first terminal device may The RNTI receives any of the three request messages (without trying multiple RA-RNTIs), which can reduce the complexity of receiving RAR messages. Carrying a second resource message for accurately indicating the time domain resource of the first request message through the first RAR message is beneficial to the first terminal device to accurately identify the RAR message that belongs to it.

It should be noted that the smaller the nuance of the time domain resource indicated by the second resource message (the higher the accuracy), the higher the accuracy rate of the terminal device in determining its own RAR message, and the efficiency of random access can be effectively improved. Avoid performing meaningless random competition.

For example, the RA-RNTI is still determined using the frequency domain resources and the starting subframe occupied by the random access request message. The indication message included in the first RAR message is the number of the time slot occupied by the first request message. The terminal device determines the accuracy of its own RAR message, so that the first terminal device can efficiently perform the random access process.

The second category,

The second type of indication message is a function value of a variable with the second resource message occupied by the random access request message as a variable.

For example, the indication message carried by the first RAR includes a message that uses the second resource message of the resource occupied by the first request message as a function value of the variable, and the indication message carried by the second RAR includes a second resource that uses the second request message. Resource messages are messages of function values of variables.

Taking the second resource message for indicating the time domain resource as an example, the instruction message may be used for indicating at least one of the following messages:

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 message carried in the first RAR message is used to indicate the 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 message is used to indicate a difference between the number of the first subframe occupied by the second RAR message and the 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 of the first mini time slot occupied by the RAR message and the random number. The difference between the numbers of the first mini-slot 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 time slot occupied by the RAR message and the number of the last time slot occupied by the random access request message, or the number of the last mini time slot occupied by the RAR message and the random number. The difference between the numbers of the last mini-slot occupied by the access request message.

For the description of 2b, 2c, and 2d, refer to the related description of 2a. For brevity, we will not repeat them here.

After receiving the RAR message, the first terminal device can determine the time domain resource information occupied by the random access request message corresponding to the RAR message according to the indication message in the RAR message, and judge the determined time domain resource message and send it by itself. If the time domain resource information of the random access request message is the same, if it is the same, determine that the RAR message belongs to itself; if it is different, determine that the RAR message does not belong to itself and continue to monitor the RAR message that belongs to itself.

For example, assuming that the indication message includes 2a, the first request message and the second request message occupy the same frequency domain resource C, the first preamble and the second preamble are both D, and the The number is N (N≥0), and the number of the first subframe occupied by the second request message is M (M≥0, and M ≠ N). After receiving the second request message, the network device receives the second request message at the Kth (N≤ K, and M ≠ N) subframes, the second RAR message is sent, the second RAR message carries the information of the second preamble B and the difference KM, and the first terminal device determines a random corresponding to the second RAR message according to the difference KM The number of the first subframe occupied by the access 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 terminal device monitors the first RAR message, the first RAR message carries the information of the first preamble D and the difference KN, and the first terminal device determines the random access corresponding to the second RAR message according to the difference KN The number of the first subframe occupied by the request message is N. The first terminal device determines that the random access request message corresponding to the first RAR message is the same as the preamble message and the occupied resource message 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 message includes information other than the random access preamble carried in the random access request message.

Specifically, the third type of instruction message may include at least one of the following messages:

Location information of terminal equipment;

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.

Identification information of the terminal equipment;

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

Beam information of terminal equipment;

The timestamp of the random access request message sent. 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 character sequence 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, 12:15:50 Beijing time). The sending timestamp may also be a partial message at the sending time (for example, 50s).

Optionally, if the RAR message carries a third type of indication message, the msg2 message and msg3 in the existing LTE system can be merged, which can save signal overhead and improve the efficiency of random access by the terminal device.

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

Above, the three types of indication messages carried in the RAR message have been described. Specifically, after receiving the RAR message, the first terminal device determines whether the indication message and the preamble message carried in the RAR message match the random request message sent by itself. If they match, the first terminal device determines that the RAR message belongs to itself. The mismatch determines that the RAR message does not belong to itself.

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

For another example, if the instruction message includes a resource message and the resource message is the same as the second resource message of the resource occupied by the first request message (or the instruction message includes a second resource message of the resource occupied by the first request message), For example, the resource information included in the indication message is the number of the first subframe occupied by the first request message, and the resource information included in the indication message matches the first request message, otherwise it does not match.

For another example, if the RAR message carries a function value message, and the function value message is the same as the variable resource value message of the second resource message of the resource occupied by the first request message (or the indication message includes the first request message The second resource message of the occupied resource is a variable function value message. For example, the instruction message includes a function value message that is the same as the first terminal device ’s function value message determined according to the first request message and the received RAR message. , The information of the function value included in the indication message matches the first request message, otherwise it does not match.

As another example, if the instruction message includes location information, and the location message is the same as the location information of the first terminal device carried in the first request message (or the instruction message includes location information of the first terminal device), the instruction message includes The location information matches the first request message, and vice versa.

As another example, if the instruction message includes an identification message and the identification message is the same as the identification message of the first terminal device carried in the first request message (or the instruction message includes the identification message of the first terminal device), the instruction message The included identification message matches the first request message, otherwise it does not match.

For another example, if the indication message includes a transmission time stamp, and the transmission time stamp is the same as the transmission time stamp of the first terminal device carried in the first request message (the indication message includes a transmission time stamp of the first request message), the The indication message includes that the sending timestamp matches the first request message, otherwise, it does not match.

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

Optionally, the indication message may be carried in a MAC subheader of the RAR message. FIG. 3 is a schematic diagram of a MAC subheader applicable to 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 message may be carried in one of the fields included in the MAC subheader.

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

Reserved bit (R);

Timing Advance Command;

Indicate the resources (uplink grant, UL grant) used when uplink msg3 is sent;

Temporary C-RNTI.

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

Therefore, compared with the prior art, the terminal device determines its own RAR message only based on the index of the random access preamble carried in the RAR message. In the embodiment of the present invention, the RAR message carries an indication message and a preamble message. The method has The higher compatibility can be applied to various application scenarios, which is beneficial to the terminal device to accurately determine the RAR message that belongs to it.

The method for random access according to the embodiment of the present invention is described above. The network device, terminal device, and system chip according to the embodiment of the present invention are described in detail below with reference to FIGS. 6 to 10.

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

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

A processing module 320, configured to determine a random access wireless network temporary identity RA-RNTI according to the random access request message;

The sending module 330 is configured to send a random access response RAR message according to the RA-RNTI. The RAR message carries a preamble message and an instruction message, and the preamble message is used to indicate the random access preamble, the preamble message, and The indication message is used by the first terminal device among at least one terminal device that has received the RAR message to determine that the RAR message belongs to the first terminal device.

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

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

Optionally, the first resource message is used to indicate the frequency domain resources and time domain resources occupied by the random access request message, the second resource message is used to indicate the time domain resources occupied by the random access request message, and the The fineness of the time domain resource indicated by the first resource message is greater than the fineness of the time domain resource indicated by the second resource message.

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

Optionally, the second resource message 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; or the first time slot occupied by the random access request message or The number of the first mini time slot; the number of the last sub frame 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.

Optionally, the message of the function value is used to indicate at least one of the following: a number 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 Difference; 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 of the first mini time slot occupied by the RAR message The difference between the number and the number of the first mini-slot occupied by the random access request message; 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 The difference between the number of the last time slot occupied by the RAR message and the number of the last time slot occupied by the random access request message, or the number of the last mini time slot occupied by the RAR message The difference between the number and the number of the last mini-slot occupied by the random access request message.

Optionally, the information carried by the random access request message other than the random preamble includes location information of the first terminal device, identification information of the first terminal device, and a sending timestamp of the random access request message. At least one of.

Optionally, the indication message is carried in a media access control subheader MAC subheader or a MAC RAR of the RAR message.

It should be understood that the network device 300 may correspond to the network device in the method 200 for random access according to the embodiment of the present invention, and the network device 300 may include a method for executing the method performed by the network device in the foregoing method. The unit. In addition, each unit in the network device 300 and the other operations and / or functions are respectively corresponding to the corresponding processes of the above method, and are not repeated here 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:

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

A processing module 420, configured to determine a random access wireless network temporary identity RA-RNTI according to the random access request message;

The receiving module 430 is configured to receive a random access response RAR message sent by the network device according to the RA-RNTI, where the RAR message carries a preamble message and an instruction message;

The processing module 420 is further configured to determine whether the RAR message belongs to the first terminal device according to a random access preamble, the preamble message, and the indication message carried in the random access request message.

Optionally, the processing module 420 is specifically configured to determine the RA-RNTI according to a first resource message of resources occupied by the random access request message; if the random access preamble indicated by the preamble message and the random access The random access preamble carried in the request message is the same, and the indication message includes: a second resource message of a resource occupied by the random access request message, a message using the second resource message as a function value, and the random access The processing module 420 is further configured to determine that the RAR message belongs to the first terminal device; wherein the first resource message and the second The resource information is different.

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

Optionally, the first resource message is used to indicate the frequency domain resources and time domain resources occupied by the random access request message, the second resource message is used to indicate the time domain resources occupied by the random access request message, and the The fineness of the time domain resource indicated by the first resource message is greater than the fineness of the time domain resource indicated by the second resource message.

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

Optionally, the second resource message 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; or the first time slot occupied by the random access request message or The number of the first mini time slot; the number of the last sub frame 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.

Optionally, the message of the function value is used to indicate at least one of the following: a number 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 Difference; 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 of the first mini time slot occupied by the RAR message The difference between the number and the number of the first mini-slot occupied by the random access request message; 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 The difference between the number of the last time slot occupied by the RAR message and the number of the last time slot occupied by the random access request message, or the number of the last mini time slot occupied by the RAR message The difference between the number and the number of the last mini-slot occupied by the random access request message.

Optionally, the information carried by the random access request message other than the random preamble includes location information of the first terminal device, identification information of the first terminal device, and a sending timestamp of the random access request message. At least one of.

Optionally, the indication message is carried in a media access control subheader MAC subheader or a MAC RAR of the RAR message.

Optionally, if the random access preamble indicated by the preamble message is different from the random access preamble carried in the random access request message, or the indication message 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. The indication message does not match the random access request message, and includes: the resource information included in the indication message and the resources 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 message is different from the information of the function value using the second resource information of the resource occupied by the random access request message as a variable; and / or the indication information The included location information is different from the location information of the first terminal device carried in the random access request message; and / or the identification message included in the indication message and the identification information of the first terminal device carried in the random access request message Different; and / or the sending timestamp included in the indication message is different from the sending timestamp carried in the random access request message.

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

FIG. 8 is a schematic block diagram of a network device 500 according to 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 a random access according to the random access request message. The radio network temporary identification RA-RNTI; the transceiver 510 is further configured to send a random access response RAR message according to the RA-RNTI, the RAR message carrying a preamble message and an instruction message, the preamble message and the instruction message are used for The first terminal device among at least one terminal device receiving the RAR message determines that the RAR message is an RAR message belonging to the first terminal device, and the preamble message is further used to indicate the random access preamble.

It should be understood that the network device 500 may correspond to the network device in the method 200 for random access according to the embodiment of the present invention, and the network device may include a method for executing the method performed by the network device in the foregoing method. Entity Unit. In addition, each entity unit in the network device and the other operations and / or functions are respectively corresponding to the corresponding processes of the above method, and for the sake of brevity, they are not repeated here.

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 a network device, where the random access request message carries a random access preamble; the processor 620 is configured to determine a random access wireless network according to the random access request message The temporary identification RA-RNTI; the transceiver 610 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, the RAR message carrying a preamble message and an indication message, The preamble message is used to indicate the random access preamble; the processor 630 is further configured to determine that the RAR message is a RAR message belonging to the first terminal device according to the preamble message and the indication message.

It should be understood that the terminal device 600 may correspond to the first terminal device in the method 200 for random access according to the embodiment of the present invention, and the terminal device 600 may include a method for executing the method performed by the first terminal device in the foregoing method. Physical unit. In addition, each entity unit in the terminal device and the other operations and / or functions described above respectively correspond to the corresponding processes of the foregoing method, and for the sake of brevity, details are not described herein again.

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, the processor 703, and a memory 704 connected through a bus 705. The processor 703 is configured to execute code in the memory 704.

Optionally, when the code is executed, the processor 703 implements the method executed by the network device in the method embodiment. For brevity, I will not repeat them here.

Optionally, when the code is executed, the processor 703 implements the method executed by the first device in the method embodiment. For brevity, I will not repeat them here.

It should be understood that the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method embodiments may be completed by using hardware integrated logic circuits or instructions in the form of software in a processor. The above processor may be a Central Processing Unit (CPU), the processor may also be other general-purpose processors, digital signal processors (DSPs), and application specific integrated circuits (Application Specific Integrated Circuits) , ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present invention may be directly implemented and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software in the decoding processor. The software device may be located in a mature storage medium such as a random memory, a flash memory, a read-only memory, a programmable read-only memory or an electronic erasable programmable memory, a register, and the like in the field. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It should also be understood that the memory in the embodiment of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), and erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable and programmable ROM (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be Random Access Memory (RAM), which is used as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as static random access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM), and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

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

An embodiment of the present invention also provides a computer-readable storage medium that stores one or more programs. The one or more programs include instructions. The instructions should be portable electronic devices including multiple application programs. When the device executes, the portable electronic device can be caused to execute the method in the embodiment of the present invention.

Those with ordinary knowledge in the technical field may realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the several embodiments provided by the embodiments of the present invention, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are only schematic. 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 elements may be combined or integrated. To another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

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, which may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.

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

If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium. It includes several instructions to enable 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 each embodiment of the present invention. The aforementioned storage media include: U disks, removable hard disks, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks, and other various program codes that can be stored Media.

The above are only specific implementations of the embodiments of the present invention, but the scope of protection of the embodiments of the present invention is not limited to this. Any person familiar with the technical field can easily implement the technical scope disclosed by the embodiments of the present invention. Any change or replacement is considered to be covered by the protection scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention shall be subject to the protection scope of the claims.

100‧‧‧Wireless communication system

110‧‧‧Network equipment

120‧‧‧The first terminal equipment

130‧‧‧Second terminal equipment

200‧‧‧ Method

S201, S202, S203, S204, S205 ‧‧‧ steps

S210, S220, S230, S240 ‧‧‧ steps

300‧‧‧ network equipment

310‧‧‧Receiving Module

320‧‧‧Processing Module

330‧‧‧Send Module

400‧‧‧ terminal equipment

410‧‧‧Send Module

420‧‧‧Processing Module

430‧‧‧Receiving module

500‧‧‧ network equipment

510‧‧‧ Transceiver

520‧‧‧Processor

600‧‧‧ terminal equipment

610‧‧‧ Transceiver

620‧‧‧Processor

700‧‧‧ System Chip

701‧‧‧ input interface

702‧‧‧ output interface

703‧‧‧Processor

704‧‧‧Memory

705‧‧‧Bus

FIG. 1 is a schematic diagram of a wireless communication system applicable to an embodiment of the present invention. FIG. 2 is a schematic flowchart of a method for random access according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a MAC subheader suitable for use in an embodiment of the present invention. FIG. 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 the 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. FIG. 10 is a schematic block diagram of a system chip according to an embodiment of the present invention.

Claims (38)

A method for random access, wherein the method includes: a network device receiving a random access request message sent by a first terminal device, the random access request message carrying a random access preamble; the network The device determines a random access wireless network temporary identity 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, the RAR message carrying a preamble message And an instruction message, the preamble message is used to indicate the random access preamble, and the preamble message and the instruction message are used for the first terminal among at least one terminal device that received the RAR message The device determines that the RAR message belongs to the first terminal device. The method according to item 1 of the scope of patent application, wherein the network device determining the random access wireless network temporary identity RA-RNTI according to the random access request message includes: the network device according to the A first resource message of a resource occupied by a random access request message determines the RA-RNTI; and the indication message includes: a second resource message of a resource occupied by the random access request message, and the random access request The second resource message of the resource occupied by the message is at least one of a variable function value message and a message other than the random preamble carried in the random access request message, wherein the first resource message It is different from the second resource message. The method according to item 2 of the scope of patent application, wherein the first resource message is used to indicate a frequency domain resource occupied by the random access request message, and the second resource message is used to indicate the random access The time domain resource occupied by the request message. The method according to item 2 of the scope of patent application, wherein the first resource message is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource message is used to indicate the The time domain resource occupied by the random access request message is described, and the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message. The method according to item 4 of the scope of patent application, wherein the second resource message is specifically used to indicate a start position of a time domain resource occupied by the random access request message and a location occupied by the random access request message. At least one of the end positions of the time domain resource. The method according to any one of claims 3 to 5, wherein the second resource message is specifically used to indicate at least one of the following messages: a first sub-node occupied by the random access request message The number of the frame; the number of the first slot or the first mini-slot occupied by the random access request message; the number of the last subframe occupied by the random access request message; and the random access Number of the last time slot or last mini time slot occupied by the request message. The method according to any one of claims 3 to 5, wherein the information of the function value is used to indicate at least one of the following information: the number of the first subframe occupied by the RAR message and The difference between the number of the first subframe occupied by the random access request message; the number of the first time slot occupied by the RAR message and the first time slot occupied by the random access request message The difference between the numbers of the RAR or the number of the first mini-slot occupied by the RAR message and the number of the first mini-slot occupied by the random access request message; the RAR The difference between the number of the last subframe occupied by the message and the number of the last subframe occupied by the random access request message; and the number of the last slot occupied by the RAR message and the random access The difference between the number of the last time slot occupied by the request message, or the number of the last mini time slot occupied by the RAR message and the number of the last mini time slot occupied by the random access request message Difference. The method according to item 7 of the scope of patent application, wherein the information carried in the random access request message other than the random preamble includes location information of the first terminal device, the first terminal device At least one of an identification message and a sending time stamp of the random access request message. The method according to item 8 of the scope of patent application, wherein the indication message is carried in a MAC subheader or a MAC RAR of a media access control subheader of the RAR message. A method for random access, wherein the method includes: a first terminal device sending a random access request message to a network device, the random access request message carrying a random access preamble; the first terminal The device determines a random access wireless network temporary identifier RA-RNTI according to the random access request message; the first terminal device receives a random access response RAR message sent by the network device according to the RA-RNTI, and The RAR message carries a preamble message and an indication message; and the first terminal device determines whether the RAR message is based on a random access preamble, the preamble message, and the indication message carried in the random access request message. Belongs to the first terminal device. The method according to claim 10, wherein the receiving, by the first terminal device according to the RA-RNTI, a random access response RAR message sent by the network device includes: The first resource information of the resources occupied by the random access request message determines the RA-RNTI; if the random access preamble indicated by the preamble message and the random access preamble carried in the random access request message The same, and the indication message includes: a second resource message of a resource occupied by the random access request message, a message using a second resource message of a resource occupied by the random access request message as a function value of a variable, and The random access request message carries at least one of messages other than the random preamble, the method further includes: the first terminal device determines that the RAR message belongs to the first terminal device; and The first resource message is different from the second resource message. The method according to item 11 of the scope of patent application, wherein the first resource message is used to indicate a frequency domain resource occupied by the random access request message, and the second resource message is used to indicate the random access The time domain resource occupied by the request message. The method according to item 11 of the scope of patent application, wherein the first resource message is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource message is used to indicate the The time domain resource occupied by the random access request message is described, and the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message. The method according to item 13 of the scope of patent application, wherein the second resource message is specifically used to indicate a start position of a time domain resource occupied by the random access request message and a location occupied by the random access request message. At least one of the end positions of the time domain resource. The method according to item 14 of the scope of patent application, wherein the second resource message 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 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; and the last occupied by the random access request message The time slot or last mini-slot number. The method according to item 15 of the scope of patent application, wherein the information of the function value is used to indicate at least one of the following information: a number of a first subframe occupied by the RAR message and the random access request The difference between the number of the first subframe occupied by the message; the difference between the number of the first timeslot occupied by the RAR message and the number of the first timeslot occupied by the random access request message Value, or the difference between the number of the first mini-slot occupied by the RAR message and the number of the first mini-slot occupied by the random access request message; the last child occupied by the RAR message The difference between the number of the frame and the number of the last subframe occupied by the random access request message; and the number of the last time slot occupied by the RAR message and the last one occupied by the random access request message The difference between the numbers of the time slots, or the difference between the number of the last mini time slot occupied by the RAR message and the number of the last mini time slot occupied by the random access request message. The method according to item 16 of the scope of patent application, wherein the information other than the random preamble carried in the random access request message includes location information of the first terminal device, the first terminal device At least one of an identification message and a sending time stamp of the random access request message. The method according to item 17 of the scope of patent application, wherein the indication message is carried in a MAC subheader or a MAC RAR of a media access control subheader of the RAR message. The method according to any one of claims 10 to 18 of the scope of patent application, wherein if the random access preamble indicated by the preamble message is different from the random access preamble carried in the random access request message, Or the instruction message 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; wherein the instruction message and the random request message The access request message does not match and includes: the resource information included in the indication message is different from the second resource information of the resource occupied by the random access request message; and / or the information of the function value included in the indication message and the The second resource information of the resource occupied by the random access request message is different from that of the variable value; and / or the location information included in the indication message and the first terminal carried in the random access request message The location information of the device is different; and / or the identification information included in the indication message is different from the identification information of the first terminal device carried in the random access request message; And / or the sending timestamp included in the indication message is different from the sending timestamp carried in the random access request message. A network device, wherein the network device includes: a receiving module for receiving a random access request message sent by a first terminal device, the random access request message carrying a random access preamble; a processing module For determining a random access wireless network temporary identity RA-RNTI according to the random access request message; and a sending module for sending a random access response RAR message according to the RA-RNTI, where the RAR message carries A preamble message and an instruction message, where the preamble message is used to indicate the random access preamble, and the preamble message and the instruction message are used in the at least one terminal device that received the RAR message The first terminal device determines that the RAR message belongs to the first terminal device. The network device according to item 20 of the patent application scope, wherein the processing module is specifically configured to: determine the RA-RNTI according to a first resource message of a resource occupied by the random access request message; and The instruction message includes: a second resource message of a resource occupied by the random access request message, a message using a second resource message of the resource occupied by the random access request message as a function value of a variable, and the random access request At least one of messages other than the random preamble carried in the incoming request message, wherein the first resource message and the second resource message are different. The network device according to item 21 of the patent application scope, wherein the first resource message is used to indicate a frequency domain resource occupied by the random access request message, and the second resource message is used to indicate the random resource Time domain resources occupied by the access request message. The network device according to item 21 of the patent application scope, wherein the first resource message is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource message is used to Indicates the time domain resource occupied by the random access request message, and the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message. The network device according to item 23 of the scope of patent application, wherein the second resource message 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 At least one of the end positions of the occupied time domain resources. The network device according to any one of claims 22 to 24, wherein the second resource message is specifically used to indicate at least one of the following messages: the first one occupied by the random access request message The number of the subframe; the number of the first slot or the first mini-slot occupied by the random access request message; the number of the last subframe occupied by the random access request message; and the random access request Number of the last time slot or last mini time slot occupied by the incoming request message. The network device according to any one of claims 22 to 24, wherein the information of the function value is used to indicate at least one of the following information: the first sub-frame occupied by the RAR message The difference between the number and the number of the first subframe occupied by the random access request message; the number of the first slot occupied by the RAR message and the first occupied by the random access request message The difference between the numbers of the time slots, or the difference between the number of the first mini time slot occupied by the RAR message and the number of the first mini time slot occupied by the random access request message; 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; and the number of the last slot occupied by the RAR message and the random number The difference between the number of the last time slot occupied by the access request message, or the number of the last mini time slot occupied by the RAR message and the number of the last mini time slot occupied by the random access request message The difference between them. The network device according to item 26 of the patent application scope, wherein the information carried in the random access request message other than the random preamble includes location information of the first terminal device, the first At least one of an identification message of the terminal device and a sending time stamp of the random access request message. The network device according to item 27 of the scope of patent application, wherein the indication message is carried in a MAC subheader or a MAC RAR of a media access control subheader of the RAR message. A terminal device, wherein the terminal device is a first terminal device, and the terminal device includes: a sending module configured to send a random access request message to a network device, and the random access request message carries random access A preamble; a processing module configured to determine a random access wireless network temporary identifier RA-RNTI according to the random access request message; a receiving module configured to receive the RA-RNTI sent by the network device according to the RA-RNTI A random access response RAR message, the RAR message carrying a preamble message and an indication message; and the processing module is further configured to: according to the random access preamble and the preamble message carried in the random access request message And the indication message to determine whether the RAR message belongs to the first terminal device. The terminal device according to item 29 of the scope of patent application, wherein the processing module is specifically configured to determine the RA-RNTI according to a first resource message of a resource occupied by the random access request message; if the preamble The random access preamble indicated by the code message is the same as the random access preamble carried in the random access request message, and the indication message includes: a second resource information of the resource occupied by the random access request message; The second resource message is at least one of a variable function value message and a message other than the random preamble carried in the random access request message, and the processing module is further configured to: The RAR message belongs to the first terminal device; and wherein the first resource message and the second resource message are different. The terminal device according to claim 30, wherein the first resource message is used to indicate a frequency domain resource occupied by the random access request message, and the second resource message is used to indicate the random access request. Time domain resources occupied by incoming request messages. The terminal device according to item 30 of the scope of patent application, wherein the first resource message is used to indicate a frequency domain resource and a time domain resource occupied by the random access request message, and the second resource message is used to indicate The time domain resource occupied by the random access request message, and the nuance of the time domain resource indicated by the first resource message is greater than the nuance of the time domain resource indicated by the second resource message. The terminal device according to item 32 of the scope of patent application, wherein the second resource message 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 occupation At least one of the end positions of the frequency domain resources. The terminal device according to item 33 of the patent application scope, wherein the second resource message is specifically used to indicate at least one of the following messages: a number of a 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; and the last number occupied by the random access request message The number of a time slot or the last mini time slot. The terminal device according to item 34 of the scope of patent application, wherein the function value information is used to indicate at least one of the following information: a number of a first subframe occupied by the RAR message and the random access The difference between the number of the first subframe occupied by the request message; the number between the number of the first timeslot occupied by the RAR message and the number of the first timeslot occupied by the random access request message The difference, or the difference between the number of the first mini-slot occupied by the RAR message and the number of the first mini-slot occupied by the random access request message; the last one occupied by the RAR message The difference between the number of the subframe and the number of the last subframe occupied by the random access request message; and the number of the last slot occupied by the RAR message and the last occupied by the random access request message The difference between the numbers of one time slot, or the difference between the number of the last mini time slot occupied by the RAR message and the number of the last mini time slot occupied by the random access request message. The terminal device according to item 35 of the scope of patent application, wherein the information carried in the random access request message other than the random preamble includes location information of the first terminal device, the first terminal At least one of an identification message of the device and a sending time stamp of the random access request message. The terminal device according to item 36 of the scope of patent application, wherein the indication message is carried in a MAC subheader or a MAC RAR of a media access control subheader 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 message is different from the random access preamble carried in the random access request message Or the instruction message does not match the random request message, the processing module is further configured to determine that the RAR message does not belong to the first terminal device; wherein the instruction message and the random access message The request message mismatch includes: the resource information included in the indication message is different from the second resource information of the resource occupied by the random access request message; and / or the function value information included in the indication message is different from the information The second resource information of the resource occupied by the random access request message is different from the variable value; and / or the location information included in the indication message is different from that of the first terminal device carried in the random access request message. The location information is different; and / or the identification information included in the indication message is different from the identification information of the first terminal device carried in the random access request message; and / or Different indication message including the transmission time of the transmission time stamp to the random access request message carries the stamp.