TWI687120B - Method for random access, network equipment and terminal equipment - Google Patents

Abstract

A method for random access, a network device and a terminal device. The method has high compatibility and is beneficial for the terminal device to accurately determine its own random access response (Random Access Response, RAR). The method includes: a network device receives a random access request message sent by a first terminal device, the random access request message carries a random access preamble; the network device determines a random access wireless network temporary identifier according to the random access request message (Random Access-Radio Network Temporary Identifier, RA-RNTI); The network device sends a random access response RAR message according to RA-RNTI. The RAR message carries a preamble message and an indication message. The preamble message is used to indicate the random access preamble , The preamble message and the indication message are used by the first terminal device of the at least one terminal device that received the RAR message to determine that the RAR message belongs to the own device.

Description

Method for random access, network equipment and terminal equipment

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

In the existing Long Term Evolution (LTE) system, when the network device receives the random access request message sent by the terminal device, the network device will be on the Physical Downlink Shared CHannel (PDSCH) Send a random access response (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 used for uplink synchronization, the initial uplink resource configuration (used to send subsequent msg3) message, and a temporary community radio network temporary identifier (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 (Physical Downlink Control Channel, PDCCH) for 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 itself, and performs the corresponding operation according to the message carried in the RAR message.

However, using this method to determine the own RAR message has a relatively large limitation, which is not conducive to the terminal device accurately determining the own RAR message.

Embodiments of the present invention provide a method, a network device, and a terminal device for random access. The method has high compatibility, which is helpful for 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 road device determines the random access wireless network temporary identifier RA-RNTI according to the random access request message; the network device sends a random access response RAR message according to the RA-RNTI, the RAR message carries a preamble message and an indication message, The preamble message is used to indicate the random access preamble, the preamble message and the indication message are used for the first terminal device in at least one terminal device that received the RAR message to determine that the RAR message belongs to the first terminal equipment.

Compared with the prior art in which the RAR message belonging to itself is determined only 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 belonging 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 the 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 resources 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 with a function value of the second resource message of the resource occupied by the random access request message as a variable, and the random access At least one of messages other than the random preamble carried in the request message, wherein the first resource message and the second resource message are different.

The indication message may include multiple types of messages, and the solution has high flexibility so that the terminal device can efficiently determine its own RAR message according to the indication 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 that determines the RA-RNTI based on the frequency domain resource information and the time domain resource information occupied by the random access request message, in this solution, the network device and the first terminal device can use the random access request The first resource message of the frequency domain resource occupied by the message 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 a RAR message, which can reduce the first terminal device's acquisition of RA -The complexity of the RNTI, while enabling the first terminal device to accurately determine its own RAR message.

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

In this solution, 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 is more nuanced, which can reduce the complexity of the first terminal device acquiring the RA-RNTI, The time domain resource indicated by the second resource is less nuanced, so that the first terminal device can accurately determine its own RAR message. This solution can balance the complexity of the terminal device receiving the RAR message and the number of times the terminal device determines that the RAR message belongs to itself.

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

In this solution, the second resource message may indicate the start position and/or the end position. The 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 messages: the number of the first subframe occupied by the random access request message; the number occupied by the random access request message The number of the first slot or the first mini slot; the number of the last subframe occupied by the random access request message; the number of the last slot or the last mini slot occupied by the random access request message .

In a possible implementation manner of the first 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 number of 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 numbers of the last subframe; the difference between the number of the last slot occupied by the RAR message and the number of the last slot occupied by the random access request message, or the number occupied by the RAR 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, the messages other than the random preamble carried in the random access request message include location information of the first terminal device, identification information of the first terminal device, and the random access At least one of the transmission time stamps of the request message.

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

In a possible implementation manner of the first aspect, the indication message is carried in a MAC access 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 sends a random access request message to a network device, where the random access request message carries a random access preamble; the first terminal The device determines the 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 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 determines that the RAR message belongs to itself based only on the index of the random access preamble carried in the RAR message, in this solution, the first terminal device determines the RAR message belonging to itself according to the indication message and the preamble message, which can Improve the accuracy of the first terminal device to determine its own RAR message, so that the terminal device can efficiently perform random access.

In a possible implementation manner of the second aspect, 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 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 by 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 with a function value of the second resource message of the resource occupied by the random access request message as a variable, and the random preamble code carried in addition to the random preamble At least one of the messages, 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 indication 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 in which RA-RNTI is determined according to the frequency domain resource information and time domain resource information occupied by the random access request message, in this solution, the first terminal device can use 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, it can improve the accuracy of the first terminal device in determining 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 and a time domain resource occupied by the random access request message, and the second resource message is used to indicate a resource occupied by the random access request message Time domain resources, and the fineness of the time domain resources indicated by the first resource message is greater than the fineness of the time domain resources indicated by the second resource message.

Although the first resource message indicates both the time domain resource and the frequency domain resource, the granularity of the time domain resource indicated by the first resource message is relatively large, which not only reduces the complexity of the first terminal device acquiring the RA-RNTI, but also improves the The efficiency of a terminal device receiving its own RAR message. This solution can balance the complexity of the terminal device receiving the RAR message and the number of times the terminal device determines that the RAR message belongs to itself.

In a possible implementation manner of the second aspect, the second resource message is specifically used to indicate the start position of the time domain resource occupied by the random access request message and the 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 messages: the number of the first subframe occupied by the random access request message; the number occupied by the random access request message The number of the first slot or the first mini slot; the number of the last subframe occupied by the random access request message; the number of the last slot or the last mini slot occupied by the random access request message .

In a possible implementation manner of the second aspect, the message of the function value 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 number of 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 numbers of the last subframe; the difference between the number of the last slot occupied by the RAR message and the number of the last slot occupied by the random access request message, or the number occupied by the RAR 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 messages other than the random preamble carried in the random access request message include location information of the first terminal device, identification information of the first terminal device, and the random access At least one of the transmission time stamps of the request message.

This solution can not only improve the accuracy of the terminal device in determining its own RAR message, but further, the solution can integrate the msg2 message and msg3 in the LTE system, which can save signal overhead and improve the random access efficiency of the terminal device.

In a possible implementation manner of the second aspect, the indication message is carried in the MAC access 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 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 by the random access request message, or the indication message does not match the random request message, The method further includes: the first terminal device determining 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 message included in the indication message and the random connection The second resource message of the resource occupied by the incoming request message is different; and/or the message of the function value included in the indication message is different from the message of the function value whose variable is the second resource message of the resource occupied by the random access request message; And/or the location message included in the indication message is different from the location message of the first terminal device carried in the random access request message; and/or the identification message included in the indication message and the first message carried in the random access request message The identification message of a terminal device is different; and/or the sending timestamp included in the indication message is different from the sending timestamp carried in the random access request message.

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

According to a fourth aspect, a terminal device is provided for performing the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the terminal device may include a module and/or unit for performing the method in the second aspect or 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, and the processor is used to execute instructions stored in the memory, and Execution of the instructions stored in the memory causes the processor to execute the method of the first aspect or any possible implementation 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 instructions stored in the memory, and The execution of the instructions stored in the memory causes the processor to execute the method of the second aspect or any possible implementation manner of the second aspect.

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

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

According to 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 used to execute code in the memory. When the code is executed, the processor can be implemented. 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 used to execute code in the memory. When the code is executed, the processor can be implemented. The foregoing 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 the resources occupied by the random access request message, and the random random access request message The second resource message of the occupied resource is a message of a function value of a variable, and at least one of messages other than the random preamble carried in the random access request message, so that the first terminal device can use the indication message and The preamble message accurately determines its own RAR message.

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention.

FIG. 1 shows a wireless communication system 100 suitable for an embodiment of the present invention. The wireless communication system 100 may include network equipment 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 (eg, UEs) located in the coverage area. Optionally, the network device 110 may be a base station in a Global System of Mobile communication (Global System of Mobile communication, "GSM" for short) system or a Code Division Multiple Access (Code Division Multiple Access, "CDMA" for short) system (Base Transceiver Station, BTS), which can also be 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 the Cloud Radio Access Network (CRAN), or the network device can be a relay station, access point, in-vehicle device, wearable Equipment, network-side equipment in the future 5th-Generation (5G) network or network equipment in the public land mobile network (PLMN) that will evolve in the future.

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

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

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

Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobile management entity, etc. This embodiment of the present invention does not limit this.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. three situations. In addition, the character “/” in this article generally indicates that the related objects are a “or” relationship.

It should be noted that “first” and “second” in the embodiments of the present invention are only used to distinguish different objects, and should not constitute any limitation on 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 for convenience of description only, and should not constitute a special limitation. The features in various situations, methods, and categories can be compared without contradictions. Combine.

Before sending the RAR message, the network device first determines the RA-RNTI according to the received random access request message. Correspondingly, the terminal device determines the RA-RNTI according to the sent random access request message. In other words, the network device and the terminal device respectively determine the RA-RNTI corresponding to the random access request message. First, the method 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 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 device and the terminal device may determine the RA-RNTI according to formula (1).

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

Where 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 Your own RAR message. This method will increase the complexity of the terminal device acquiring RAR messages.

For example, in a multi-beam system, in order to improve the success rate of the terminal device sending the random access request message, the terminal device can send the random access request message to the network device through different beams. When the terminal device sends a random access request message on different beams, the information of the time domain resource corresponding to each beam is different (for example, the number of the corresponding first subframe is different). At this time, the terminal device needs to try multiple RA-RNTIs when listening to its own RAR message, resulting in a higher complexity for the terminal device to obtain RAR.

For another example, in order to improve the success rate of the terminal device sending a random access preamble, 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 preamble carried may be the same or different). At this time, the terminal device also needs to try multiple RA-RNTIs when listening to the RAR message belonging to the first terminal device, resulting in a higher complexity for the terminal device to obtain the RAR message.

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

method one,

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

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

RA-RNTI = t_id+A (2)

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

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

RA-RNTI=10f_id+B (3)

Where, 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 the adjustment parameter.

This method of determining the RA-RNTI can reduce the complexity of the terminal device acquiring the RAR message. However, the determination of the RAR message belonging to itself in the prior art has limitations. If the method 1 is the same as the method of determining the RAR message belonging to itself in the prior art Combined, it is easy to cause errors in terminal device judgment.

For example, in the case where the first resource message is used to indicate the frequency domain resource occupied by the random access request message, the network device and the terminal device determine RA-RNTI according to the first resource message, if the first terminal device and the second terminal device Both occupy frequency domain resources C and send random access request messages, and the random access request messages sent by the first terminal device and the second terminal device both include a random access preamble D, and the network device first sends The random access request message sends a 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 random access preamble D message ( For example, the index of the random access preamble D). If the method of determining the RAR message in the prior art is still used (that is, only the RAR message belonging to itself is determined according to the index of the random access preamble), the first terminal device may mistakenly consider the second RAR message to be its own RAR message, and Use the information in the second RAR message to perform related operations, resulting in an error in the processing of the first terminal device.

Similarly, in the case where the first resource message is used to indicate the time-domain resource occupied by the random access request message, due to the limitation of the RAR message that determines that it belongs to itself in the prior art, it is also easy to cause an error in the judgment of the terminal device.

Method two

The RA-RNTI is determined according to the first resource message of the resources occupied by the random access request message. Wherein, the first resource message is used to indicate the frequency domain resource and the time domain resource occupied by the random access request message, and the time domain resource indicated by the first resource message in mode 2 is more nuanced.

For example, in the second method, 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 terminal device receiving the RAR message and the number of times that the terminal device determines its own RAR. However, due to the limitation of determining that the RAR message belongs to you in the prior art, if you combine the second method with the method of determining your own RAR message in the prior art, it is easy to cause an error in the judgment of the terminal device. The description will not be 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 certain terminal device, the multiple terminal devices according to the random access carried in the RAR message The preamble will consider that the RAR message belongs to itself, and will compete according to the RAR message. Since the terminal device does not correctly identify its own RAR message, it will cause the terminal device to compete meaninglessly.

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

In view of this, embodiments of the present invention provide a method for random access. The RAR message sent by the network device includes a preamble message and an indication message. The terminal device can 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 judge its own RAR message. The method for random access according to an 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 described from the perspective of device interaction. The method 200 can be applied to a communication system including a network device and at least one terminal device. The communication system may be the wireless communication system 100 shown in FIG. 1.

Hereinafter, without loss of generality, taking the interaction of the network device and the first terminal device (and the second terminal device) as an example, the method according to the embodiment of the present invention will be described in detail. It should be understood that the first terminal device is any terminal device in at least one terminal device, and the "first" is only used for distinguishing descriptions, and should not constitute any limitation to the embodiments of the present invention. Similarly, the second terminal device should not constitute any limitation on the embodiments of the present invention.

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

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

Optionally, in the embodiment of the present invention, the first terminal device may send an access request message to the network device in a multi-beam manner.

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

Optionally, in the embodiment of the present invention, the first terminal device may wait for the RAR message sent by the network device after sending the random access request message through one beam, and if it does not wait for the RAR message sent by the network device, use another beam Send a 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 again to send the random access request message.

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 a 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 description, the "random access request message sent by the first terminal device" may be recorded as the "first request message", and the "random access preamble carried in the first random access request message" may be recorded as the "first The "preamble" records "RA-RNTI determined according to the first request message" as "first RA-RNTI" and "RAR message sent by the network device according to the first request message" 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 where the terminal device determines its own RAR message only based 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 message and indication message carried in the RAR message. This method has high compatibility and can be applied to a variety of application scenarios, which is conducive to the first terminal device accurately determining 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, the network device receives the second random access request message, and may record the "second random access request message" as "the first Second request message";

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

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

S204. The second terminal device determines that the second RAR message is its own RAR message according to the preamble message and the indication message carried in the second RAR message, and the second terminal device stops listening to its own RAR message;

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

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

Case 2: The first RA-RNTI and the second RA-RNTI are the same, 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 indication 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 may process according to the second RAR message; if the first terminal device determines that the second RAR message does not belong to the first A terminal device, the first terminal device needs to continue to listen to RAR messages belonging to the first terminal device.

Specifically, in case two, the method 200 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 message and the indication message carried in the second RAR message. The first terminal device needs to continue to listen to its own RAR message, where, 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 the second resource message of the resource occupied by the first request message, and the indication message carried by the second RAR includes the second resource message of the resource occupied by the second request message.

As an optional example, if the first method is used to determine the RA-RNTI, the domain types of the first resource information and the second resource information 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 that the random access request message occupies time domain resources. 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 last mini time slot occupied by the random access request message.

For descriptions of 1b, 1c and 1d, please refer to the relevant descriptions of 1a, and they will not be repeated here for brevity.

The first type of indication message can separate frequency domain resources and time domain resources. For example, the frequency domain resource occupied by the random access request message is used to determine the RA-RNTI, and the time domain resource occupied by the random access request message is used to determine the indication message. This method can enable the first terminal device to accurately determine its own RAR message. At the same time, this method can reduce the complexity of the first terminal device receiving the RAR message.

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), 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 the message of the second preamble D and the number M. Since the first terminal device and the second terminal device use the same frequency domain resource to send the random access request message, the first terminal device and the second Both terminal devices can receive (monitor) the second RAR message. Since the number M is different from the number N, the first terminal device determines that the second RAR message does not belong to itself, and the first terminal device continues to listen to the RAR message that belongs to itself. If the first terminal device listens to the message including the first preamble D and the first RAR message with 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 second method is used to determine the RA-RNTI, the fineness of the resources indicated by the first resource message and the second resource message are different, and the fineness of the resources indicated by the first resource message is greater than the indication of the second resource message The nuance of resources.

For example, the first resource message is used to indicate that the random access request message (for example, 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 The time domain resource indicated by the first resource message is more subtle than the time domain resource indicated by the second resource message.

It should be noted that the subtlety in the embodiments of the present invention may refer to the unit size of resources. For example, taking time-domain resources as an example, the fineness of a radio frame is greater than the fineness of a subframe, and the fineness of a subframe is greater than the fineness of a time slot. Among them, the subtlety 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 message occupied by a random access request message, and the second resource message is used to indicate a subframe message occupied by a random access request message.

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

The second type of indication message can balance the complexity of receiving RAR messages and the number of times of receiving RAR messages. Specifically, the first terminal device may first receive a part of the RAR message according to the frequency domain resource occupied by the random access request message and the large and detailed time domain resource, which can reduce the complexity of receiving the RAR message and the number of times the RAR message is received. First 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 belonging to itself.

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. 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, and the first terminal device can use the RA-RNTI The RNTI receives any one of the three request messages (no need to try multiple RA-RNTIs), which can reduce the complexity of receiving RAR messages. Carrying the 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 that can accurately identify its own RAR message.

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 of the terminal device in determining its own RAR message, which can effectively improve the efficiency of random access, Avoid performing meaningless random competition.

For example, the frequency domain resource occupied by the random access request message and the starting subframe are still used to determine the RA-RNTI. The indication message included in the first RAR message is the number of the time slot occupied by the first request message. This method can improve the first 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 uses the second resource message occupied by the random access request message as a variable function value message.

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

Taking the second resource message for indicating time domain resources as an example, the indication message may be used to indicate 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 indication message carried is used to indicate the 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 and randomness of the first mini time slot occupied by the RAR message 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 slot occupied by the RAR message and the random The difference between the numbers of the last mini-slot occupied by the access request message.

For descriptions of 2b, 2c, and 2d, please refer to the relevant descriptions of 2a, which will not be repeated here for brevity.

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

For example, suppose 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 first request frame occupies the first subframe. The number is N (N ≥ 0), the number of the first subframe occupied by the second request message is M (M ≥ 0, and M ≠ N), and the network device receives the second request message in the K (N ≤ K, and M≠N) subframes to send a second RAR message, the second RAR message carries the message of the second preamble B and the difference KM, the first terminal device determines the randomness 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 listens to the first RAR message, the first RAR message carries the message 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 and the first request message have the same preamble information and occupied resource information. 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 messages other than the random access preamble carried in the random access request message.

Specifically, the third type of indication 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 information.

Identification information of terminal equipment;

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

Beam information of terminal equipment;

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

The sending timestamp may include a sequence of characters, which is used to identify the 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 the 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 of the terminal device.

For example, the first request message sent by the first terminal device carries the first preamble and the identification message of the first terminal device. If the RAR message received by the first terminal device includes the first preamble and the identification message, 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 successfully competes in the random access process.

Above, the three types of indication messages carried by 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 it matches, 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 the second resource message of the resource occupied by the first request message), For example, the resource message included in the indication message is the number of the first subframe occupied by the first request message. The resource message 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 function value message of the resource 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 message of a function value of a variable), for example, the message of the function value included in the indication message is the same as the message of the function value determined by the first terminal device according to the first request message and the received RAR message , The function value message included in the instruction message matches the first request message, otherwise, it does not match.

For another example, if the indication message includes location information, and the position information is the same as the position information of the first terminal device carried in the first request message (or the indication message includes the position information of the first terminal device), the indication message includes The location message matches the first request message, otherwise, it does not match.

For another example, if the indication 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 indication message includes the identification message of the first terminal device), the indication message It includes that the identification message matches the first request message, otherwise, it does not match.

For another example, if the instruction 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 instruction message includes the 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 one 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 the 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 the MAC RAR of the RAR message. 4 is a schematic diagram of an example of a MAC RAR applicable to an embodiment of the present invention. This Figure 4 is mainly aimed at the MAC RAR of ordinary users. FIG. 5 is a schematic diagram of another example of MAC RAR applicable to an embodiment of the present invention. This FIG. 5 is mainly aimed at covering the MAC RAR of the enhanced type user. As shown in Figures 4 and 5, MAC RAR includes at least the following fields:

Reserved bit (R);

Timing Advance Command;

Indicate the resources used when sending upstream msg3 (uplink grant, UL grant);

Temporary C-RNTI.

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

Therefore, compared with the prior art, the terminal device only determines its own RAR message according to the index of the random access preamble carried in the RAR message. In the embodiment of the present invention, the RAR message carries the indication message and the preamble message. This method has The higher compatibility can be applied to a variety of application scenarios, which is helpful for the terminal device to accurately determine its own RAR message.

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

FIG. 6 is a schematic block diagram of a network device 300 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 the first terminal device, where the random access request message carries a random access preamble;

The processing module 320 is configured to determine a random access wireless network temporary identifier 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 indication message, the preamble message is used to indicate the random access preamble, the preamble message and The indication message is used for the first terminal device in at least one terminal device that 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 message of the resources occupied by the random access request message; the indication message includes: the number of resources occupied by the random access request message At least one of two resource messages, 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 a message other than the random preamble carried in the random access request message, The first resource information and the second resource information are different.

Optionally, the first resource message is used to indicate the frequency 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.

Optionally, 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 second resource message is used to indicate the time domain resources occupied by the random access request message, and the The subtlety of the time domain resource indicated by the first resource message is greater than the subtlety 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 messages: the number of the first subframe occupied by the random access request message; the first time slot occupied by the random access request message or The number of the first mini slot; the number of the last subframe occupied by the random access request message; the number of the last slot or the last mini 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 messages: the number between 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 Difference between; 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 last mini-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 messages other than the random preamble carried in the random access request message include the location information of the first terminal device, the identification message of the first terminal device, and the sending timestamp of the random access request message At least one of them.

Optionally, the indication message is carried in the MAC access subheader or 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 an embodiment of the present invention, and the network device 300 may include the method performed by the network device in performing the above method Unit. In addition, each unit and other operations and/or functions in the network device 300 are respectively for the corresponding flow of the above method, and for the sake of brevity, they are not repeated here.

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

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

The processing module 420 is configured to determine a random access wireless network temporary identifier 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, the RAR message carries a preamble message and an indication message;

The processing module 420 is further configured to determine 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.

Optionally, the processing module 420 is specifically configured to determine the RA-RNTI according to the first resource message of the 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 the resource occupied by the random access request message, a message with a function value of which the second resource message is a variable, and the random access At least one of the messages other than the random preamble carried in the request message, 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 Resource information is different.

Optionally, the first resource message is used to indicate the frequency 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.

Optionally, 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 second resource message is used to indicate the time domain resources occupied by the random access request message, and the The subtlety of the time domain resource indicated by the first resource message is greater than the subtlety 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 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 messages: the number of the first subframe occupied by the random access request message; the first time slot occupied by the random access request message or The number of the first mini slot; the number of the last subframe occupied by the random access request message; the number of the last slot or the last mini 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 messages: the number between 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 Difference between; 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 last mini-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 messages other than the random preamble carried in the random access request message include the location information of the first terminal device, the identification message of the first terminal device, and the sending timestamp of the random access request message At least one of them.

Optionally, the indication message is carried in the MAC access subheader or 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 by 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: resource information included in the indication message and resources occupied by the random access request message Is different from the second resource message; and/or the message of the function value included in the indication message is different from the message of the function value whose variable is the second resource message of the resource occupied by the random access request message; and/or the indication message The location information included 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 an embodiment of the present invention, and the terminal device 400 may include the method executed by the first terminal device in performing the above method Unit. In addition, each unit and other operations and/or functions in the terminal device are respectively for the corresponding flow of the above method, and for the sake of brevity, they are not repeated here.

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 used to: receive a random access request message sent by a first terminal device, where the random access request message carries a random access preamble; the processor 520 is used to: determine a random access according to the random access request message The wireless network temporary identification RA-RNTI; the transceiver 510 is also used to send a random access response RAR message according to the RA-RNTI. The RAR message carries a preamble message and an indication message. The preamble message and the indication message are used The first terminal device in at least one terminal device that receives the RAR message determines that the RAR message is a RAR message belonging to the first terminal device, and the preamble message is also 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 an embodiment of the present invention, and the network device may include a method for performing the method performed by the network device in the above method Entity unit. In addition, each physical unit and other operations and/or functions in the network device are respectively for the corresponding flow of the above method, and for the sake of brevity, they are not repeated here.

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 used 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 used to: determine a random access wireless network according to the random access request message Temporary identification RA-RNTI; Transceiver 610 is also used to: according to the RA-RNTI receive a random access response RAR message sent by the network device according to the random access request message, the RAR message carries a preamble message and an indication message, The preamble message is used to indicate the random access preamble; the processor 630 is further used 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 an embodiment of the present invention, and the terminal device 600 may include a method executed by the first terminal device in performing the above method Physical unit. In addition, each physical unit and other operations and/or functions in the terminal device are respectively for the corresponding flow of the above method, and for the sake of brevity, they are not repeated here.

10 is a schematic structural diagram of a system wafer according to an embodiment of the 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 by a bus 705. The processor 703 is used to execute the 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, the steps of the foregoing method embodiments may be completed by instructions in the form of hardware integrated logic circuits or software in the processor. The above-mentioned processor may be a central processing unit (Central Processing Unit, CPU), the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), and application-specific integrated circuits (Application Specific Integrated Circuit) , ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logical block diagrams in the embodiments of the present invention may be implemented or executed. The 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 conjunction with the embodiments of the present invention may be directly embodied 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 can be located in random memory, flash memory, read-only memory, programmable read-only memory or electronic erasable programmable memory, registers and other mature storage media in the art. The storage medium is located in the memory. The processor reads the information in the memory and combines the hardware to complete the steps of the above method.

It should also be understood that the memory in the embodiments of the present invention may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically erasable and programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (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 connection 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, a status signal bus, and so on. However, for the sake of clarity, various busbars are marked as busbar systems 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 including instructions, and the instructions are included in a portable electronic device that includes multiple application programs. When the device executes, the portable electronic device can execute the method of the embodiment of the present invention.

Those of ordinary skill in the art can realize that the example units and algorithm steps described in conjunction 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 of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of the present invention.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided by the embodiments of the present invention, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a division of logical functions. In actual implementation, there may be other divisions, 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 an indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separate, and the component displayed as a unit may or may not be a physical unit, that is, it 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 purpose 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 alone 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 solutions of the embodiments of the present invention essentially or part of the contribution to the existing technology or the technical solutions can be embodied in the form of software products, the computer software products are stored in a storage medium, Several instructions are included 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 disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or CD-ROM, etc. can store program code Medium.

The above descriptions are only specific implementations of the embodiments of the present invention, but the protection scope of the embodiments of the present invention is not limited to this, and any person skilled in the art may easily within the technical scope disclosed by the embodiments of the present invention Changes or replacements should be covered within the protection scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention should be subject to the protection scope of the claims.

100‧‧‧Wireless communication system 110‧‧‧Network equipment 120‧‧‧ First terminal equipment 130‧‧‧Second terminal equipment 200‧‧‧Method S201, S202, S203, S204, S205‧‧‧ Step S210, S220, S230, S240 ‧‧‧ Step 300‧‧‧ Network equipment 310‧‧‧ Receive 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‧‧‧Processing 700 700‧‧‧ 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. 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 access subheader applicable to an embodiment of the present invention. 4 is a schematic diagram of an example of a MAC RAR applicable to an embodiment of the present invention. FIG. 5 is a schematic diagram of another example of MAC RAR applicable to an embodiment of the present invention. 6 is a schematic block diagram of an example of a network device according to an embodiment of the present invention. 7 is a schematic block diagram of an example of a terminal device according to an embodiment of the present invention. 8 is a schematic block diagram of another example of a network device according to an embodiment of the present invention. 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 wafer according to an embodiment of the present invention.

200‧‧‧Method

S201, S202, S210, S220, S203, S204, S205, S230, S240

Claims (30)

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 determining the random access wireless network temporary identifier RA-RNTI according to the random access request message includes: the network device determining the RA- according to the first resource information of the resources occupied by the random access request message RNTI; and the indication message includes: a second resource message of the resource occupied by the random access request message, a message with a function value of the second resource message of the resource occupied by the random access request message as a variable, and At least one of messages other than the random preamble carried in the random access request message, wherein the first resource message and the second resource message are different, and wherein the first resource message It is used to indicate the frequency domain resource and time domain resource occupied by the random access request message, the second resource message is used to indicate the time domain resource occupied by the random access request message, and the first resource message indicates The subtlety of the time domain resource is greater than the subtlety of the time domain resource indicated by the second resource message; and the network device sends a random access response RAR message according to the RA-RNTI, the RAR message carries a preamble Message and indication message, the preamble message is used to indicate the random access preamble, the preamble message and the indication message are used for the first in at least one terminal device that receives the RAR message The terminal device determines that the RAR message belongs to the first terminal device. The method according to item 1 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 access Time domain resources occupied by request messages. The method according to item 1 of the patent application scope, wherein the second resource message is specifically used to indicate the starting position of the time domain resource occupied by the random access request message and the occupied position of the random access request message At least one of the end positions of time domain resources. The method according to item 2 or 3 of the patent application scope, wherein the second resource message is specifically used to indicate at least one of the following messages: the number of the first subframe occupied by the random access request message; The number of the first time 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 number occupied by the random access request message The number of the last time slot or the last mini time slot. The method according to item 2 or 3 of the patent application scope, wherein 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 is connected to the random The difference between the number of the first subframe occupied by the incoming request message; 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 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 occupied by the RAR message The difference between the number of one 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 number occupied by the random access request message The difference between the numbers of the last 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 method according to item 5 of the patent application scope, wherein the messages other than the random preamble carried in the random access request message include location information of the first terminal device, and At least one of the identification message of the first terminal device and the sending timestamp of the random access request message. The method according to item 6 of the patent application scope, wherein the indication message is carried in a MAC access subheader or MAC RAR of the medium access control subheader of the RAR message. A method for random access, wherein the method includes: a first terminal device sends a random access request message to a network device, the random access request message carries a random access preamble; the first terminal The device determines the random access wireless network temporary identifier RA-RNTI according to the random access request message; the first terminal device receives the random access response RAR message sent by the network device according to the RA-RNTI, including : The first terminal device determines the RA-RNTI according to the first resource message of the resources occupied by the random access request message; if the random access preamble indicated by the preamble message and the random access request The random access preamble carried in the message is the same, and the indication message includes: a second resource message of resources occupied by the random access request message, and a second resource message of resources occupied by the random access request message as At least one of a variable-valued message and a message other than the random preamble carried in the random access request message, wherein the first resource message and the second resource message are different, and Wherein, the first resource message is used to indicate the frequency domain resource and 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 subtlety of the time domain resource indicated by the first resource message is greater than the subtlety of the time domain resource indicated by the second resource message, and the RAR message carries a preamble message and an indication message; and 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. The method according to item 8 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 access Time domain resources occupied by request messages. The method according to item 8 of the patent application scope, wherein the second resource message is specifically used to indicate the starting position of the time domain resource occupied by the random access request message and the occupied position of the random access request message At least one of the end positions of time domain resources. The method according to item 10 of the patent application scope, wherein the second resource message is specifically used to indicate at least one of the following messages: the number of the first subframe occupied by the random access request message; The number of the first time slot or 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 last one occupied by the random access request message The number of the time slot or the last mini time slot. The method according to item 11 of the patent application scope, wherein 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 random access request The difference between the number of the first subframe occupied by the message; 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 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 sub-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 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 all The difference between the numbers of the last mini-slot occupied by the random access request message. The method according to item 12 of the patent application scope, wherein the message other than the random preamble carried in the random access request message includes the location information of the first terminal device, the first terminal device At least one of the identification message and the sending timestamp of the random access request message. The method according to item 13 of the patent application scope, wherein the indication message is carried in a MAC access subheader or MAC RAR of the medium access control subheader of the RAR message. The method according to any one of items 8 to 14 of the patent application range, 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 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 and the random request message The access request message does not match, including: the resource message included in the indication message is different from the second resource message of the resource occupied by the random access request message; and/or the function value message and the The second resource message of the resource occupied by the random access request message is a message with a variable function value; and/or the location message 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 message included in the indication message is different from the identification message of the first terminal device carried in the random access request message; and/or the transmission timestamp included in the indication message It 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 , Used to determine the random access wireless network temporary identifier RA-RNTI according to the random access request message, specifically, the processing module is used to determine the first resource of the resources occupied by the random access request message Message to determine the RA-RNTI; and a sending module for sending a random access response RAR message according to the RA-RNTI, the RAR message carries a preamble message and an indication message, and the preamble message is used to indicate The random access preamble, the preamble message and the indication message are used by the first terminal device in at least one terminal device that received the RAR message to determine that the RAR message belongs to the first terminal device , Wherein the instruction message includes: a second resource message of the resource occupied by the random access request message, a message that takes the second resource message of the resource occupied by the random access request message as a function value of a variable, and At least one of messages other than the random preamble carried in the random access request message, wherein the first resource message and the second resource message are different, and wherein the first resource message It is used to indicate the frequency domain resource and time domain resource occupied by the random access request message, the second resource message is used to indicate the time domain resource occupied by the random access request message, and the first resource message indicates The subtlety of the time domain resource is greater than the subtlety of the time domain resource indicated by the second resource message. The network device according to item 16 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 Time domain resources occupied by access request messages. The network device according to item 16 of the patent application scope, wherein the second resource message is specifically used to indicate the starting position of the time domain resource occupied by the random access request message and the random access request message At least one of the end positions of occupied time domain resources. The network device according to item 17 or 18 of the patent application scope, wherein the second resource message is specifically used to indicate at least one of the following messages: the first subframe occupied by the random access request message Number; the number of the first time 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 message The number of the last time slot or last mini time slot occupied. The network device according to item 17 or 18 of the patent application scope, wherein 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 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 number of the first time slot occupied by the random access request message The difference between them, 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 difference between the number of the last 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 random access request message The difference between the number of the last time slot occupied, 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 network device according to item 20 of the patent application scope, wherein the message other than the random preamble carried in the random access request message includes the location information of the first terminal device, the first At least one of an identification message of the terminal device and a transmission time stamp of the random access request message. The network device according to item 21 of the patent application scope, wherein the indication message is carried in a MAC access subheader or MAC RAR of the medium 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, the random access request message carrying random access Preamble; processing module, used to determine the random access wireless network temporary identifier RA-RNTI according to the random access request message, specifically, the processing module is used to occupy according to 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 by the random access request message, and the indication message includes : A second resource message of resources occupied by the random access request message, a message with a function value of which the second resource message is a variable, and the random preamble code carried in addition to the random preamble At least one of the messages, the processing module is further configured to: determine that the RAR message belongs to the first terminal device; and wherein the first resource message and the second resource message are different, and wherein, 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 second resource message is used to indicate the time domain resources occupied by the random access request message, and all The subtlety of the time domain resource indicated by the first resource message is greater than the subtlety of the time domain resource indicated by the second resource message; the receiving module is configured to receive the randomness sent by the network device according to the RA-RNTI Access response RAR message, the RAR message carries a preamble message and an indication message; and the processing module is also used to: according to the random access preamble carried in the random access request message, the preamble message and The indication message determines whether the RAR message belongs to the first terminal device. The terminal device according to item 23 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 access The time domain resource occupied by the incoming request message. The terminal device according to item 23 of the patent application scope, wherein the second resource message is specifically used to indicate the starting position of the time domain resource occupied by the random access request message and the occupation of the random access request message At least one of the end positions of the frequency domain resources. The terminal device according to item 25 of the patent application scope, wherein the second resource message is specifically used to indicate at least one of the following messages: the number of the first subframe occupied by the random access request message; 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 last number occupied by the random access request message The number of a time slot or the last mini time slot. The terminal device of claim 26, wherein 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 random access The difference between the number of the first subframe occupied by the request message; 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 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 slot, or the difference between the number of the last mini slot occupied by the RAR message and the number of the last mini slot occupied by the random access request message. The terminal device according to item 27 of the patent application scope, wherein the message other than the random preamble carried in the random access request message includes the location information of the first terminal device, the first terminal At least one of the identification message of the device and the sending timestamp of the random access request message. The terminal device according to item 28 of the patent application scope, wherein the indication message is carried in a MAC access subheader or MAC RAR of the RAR message. The terminal device according to any one of items 23 to 29 of the patent application range, 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 indication message does not match the random request message, the processing module is also used to: determine that the RAR message does not belong to the first terminal device; wherein, the indication message and the random access The request message does not match, including: the resource message included in the indication message is different from the second resource message of the resource occupied by the random access request message; and/or the function value message included in the indication message is different from the The second resource message of the resource occupied by the random access request message is a message with a variable function value; and/or the location message included in the indication message is different from the location information of the first terminal device carried in the random access request message The location message is different; and/or the indication message included in the indication message is different from the identification message of the first terminal device carried in the random access request message; and/or the transmission time stamp and the location message included in the indication message The sending timestamp carried in the random access request message is different.

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