WO2023273867A1

WO2023273867A1 - Random access method and related apparatus

Info

Publication number: WO2023273867A1
Application number: PCT/CN2022/098654
Authority: WO
Inventors: 范慧芳
Original assignee: 北京紫光展锐通信技术有限公司
Priority date: 2021-06-30
Filing date: 2022-06-14
Publication date: 2023-01-05
Also published as: CN115551108A

Abstract

Disclosed in the embodiments of the present application are a random access method and a related apparatus. In the method, by means of sending a first random access request message, a terminal device requests second random access configuration information, and uses the random access preamble and the random access resources in the second random access configuration information to access an access network device. The present method is conducive to reducing the resource consumption of random access, and allows the terminal device to quickly access the network.

Description

Random access method and related device

technical field

The present application relates to the field of communication technologies, and in particular to a random access method and related devices.

Background technique

In the indoor enhancement scenario, when the terminal device moves from outdoor to indoor, the terminal device needs to switch from the outdoor macro base station to the indoor small base station or access point (Access Point, AP). If the indoor small base station is connected to the Internet through a cable, there is no Xn interface between the outdoor macro base station and the indoor small base station. As a result, when a terminal device switches from an outdoor macro base station to an indoor small base station, the terminal device needs to disconnect from the outdoor macro base station first, and then initiate random access to the indoor small base station again to access the indoor small base station. Therefore, how to enable the terminal device to access the network more quickly while reducing the consumption of random access resources as much as possible has become a problem to be solved.

Contents of the invention

The embodiments of the present application provide a random access method and a related device, which are beneficial to reduce the consumption of random access resources, and at the same time enable terminal devices to access the network more quickly.

In a first aspect, an embodiment of the present application provides a random access method, the method including: sending a first random access request message to an access network device, where the first random access request message includes a first random access preamble , the first random access request message is sent on the first random access resource, where the first random access request message is used to request second random access configuration information;

Receive a first random access response message broadcast by the access network device, where the first random access response message includes second random access configuration information.

In an optional implementation manner, first random access configuration information is acquired, where the first random access configuration information includes one or more first random access preambles, and/or one or more first A random access resource, where the first random access resource refers to a time-frequency domain resource where the first random access preamble is located.

In an optional implementation manner, the first random access configuration information is broadcast by an access network device, or

The first random access configuration information is configured in advance by the access network device before receiving the first random access request message, that is, pre-configured, or

The first random access configuration information is specified by a protocol.

In an optional implementation manner, the second random access configuration information includes: one or more dedicated random access preambles, and/or, one or more second random access resources.

In an optional implementation manner, one or more first random access preambles in the first random access configuration information are different from the random access preambles in the third random access configuration information; or,

One or more dedicated random access preambles in the second random access configuration information are different from the random access preambles in the third random access configuration information; or,

One or more first random access resources in the first random access configuration information are different from random access resources in the third random access configuration information; or,

One or more second random access resources in the second random access configuration information are different from random access resources in the third random access configuration information.

In an optional implementation manner, the second random access preamble is sent to the access network device, and the second random access preamble is sent on the second random access resource; the second random access preamble is in selected from one or more dedicated random access preambles, the second random access preamble being used for random access;

Receive the second random access response message from the access network device, the second random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink permission UL Grant resource, temporary cell wireless network temporary identifier .

It can be seen that in this method, the terminal device requests the second random access configuration information by sending the first random access request message, and then the terminal device uses the random access preamble and random access resource in the second random access configuration information to access the network. Since the random access preamble and random access resources in the second random access configuration information are broadcast to the terminal device, after the terminal device is disconnected from the source access network device, it connects to the target access network device for random access. When used when entering, because the probability that different users are disconnected from the source access network device and connected to the same target access network device at the same time is very small, therefore, the terminal device can quickly access the network. And the random access preamble and the random access resources in the second random access configuration information are determined according to the first random access request message, so compared with the prior art, the consumption of random access resources can be reduced.

In a second aspect, an embodiment of the present application provides a random access method, the method including: receiving a first random access request message from a terminal device, where the first random access request message includes a first random access preamble , the first random access request message is used to request second random access configuration information;

Broadcast a first random access response message, where the first random access response message includes second random access configuration information.

In an optional implementation manner, the first random access preamble is determined according to the first random access configuration information, where,

The first random access configuration information is broadcast by the access network device, or

The first random access configuration information is specified by a protocol.

In an optional implementation manner, a second random access preamble from a terminal device is received, and the second random access preamble is sent on a second random access resource; the second random access preamble is selected among one or more dedicated random access preambles, the second random access preamble being used for random access;

Sending a second random access response message to the terminal device, where the second random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink grant UL Grant resource, temporary cell wireless network temporary identifier.

It can be seen that in this method, the access network device determines the second random access configuration information by receiving the first random access request message, and then sends the second random access configuration information to the terminal device, so that the terminal device uses the second random access configuration information. Access configuration information to access the network. Since the random access preamble and random access resources in the second random access configuration information are broadcast to the terminal device, after the terminal device is disconnected from the source access network device, it connects to the target access network device for random access. When used when entering, because the probability that different users are disconnected from the source access network device and connected to the same target access network device at the same time is very small, therefore, the terminal device can quickly access the network. And the random access preamble and random access resources in the second random access configuration information are determined according to the first random access request message, so compared with the prior art, the consumption of random access resources can be reduced.

In a third aspect, the embodiment of the present application provides a random access method, the method includes: sending a second random access request message to an access network device, and the second random access request message includes a third random access preamble code, the second random access request message is sent on the third random access resource, and the second random access request message is used to request access to the access network device;

Receive a third random access response message from the access network device, where the third random access response message indicates whether the terminal device successfully accesses the access network device.

In an optional implementation manner, the third random access response message includes one or more of the following: a timing adjustment instruction, a preamble index, an uplink grant UL Grant resource, and a temporary cell wireless network temporary identifier.

In an optional implementation manner, the third random access preamble is determined according to fourth random access configuration information, where the fourth random access configuration information is broadcast by an access network device, or

The fourth random access configuration information is configured in advance by the access network device before receiving the third random access preamble, that is, pre-configured, or

The fourth random access configuration information is specified by the protocol.

In an optional implementation manner, the fourth random access configuration information includes: multiple non-contention third random access preambles, and/or, multiple non-contention third random access resources.

In an optional implementation manner, the multiple non-contention third random access preambles in the fourth random access configuration information are different from the random access preambles in the third random access configuration information; or, The multiple non-contention third random access resources in the fourth random access configuration information are different from the random access resources in the third random access configuration information. The fourth random access configuration information is specially configured by the access network device for when the terminal device disconnects from the source access network device and then connects to the target access network device for random access.

It can be seen that in this method, the terminal device can quickly access the network by sending a dedicated third random access preamble to perform non-contention random access.

In a fourth aspect, the embodiment of the present application provides a random access method, the method includes: receiving a second random access request message from a terminal device, where the second random access request message includes a third random access preamble , the second random access request message is used to request access to the access network device;

Sending a third random access response message to the terminal device, where the third random access response message indicates whether the terminal device successfully accesses the access network device.

In an optional implementation manner, the third random access preamble is determined according to fourth random access configuration information, where the fourth random access configuration information is broadcast by the access network device, or The fourth random access configuration information is configured in advance by the access network device before receiving the third random access preamble, that is, pre-configured, or the fourth random access configuration information is specified by a protocol.

It can be seen that in this method, the terminal device performs non-contention random access by sending a dedicated third random access preamble, and can quickly access the network.

In a fifth aspect, the embodiment of the present application provides a random access device, and the random access device includes:

A sending unit, configured to send a first random access request message to an access network device, where the first random access request message includes a first random access preamble, and the first random access request message is on the first random access resource Sending, the first random access request message is used to request the second random access configuration information;

The receiving unit is configured to receive a first random access response message broadcast by the access network device, where the first random access response message includes second random access configuration information.

In addition, in this aspect, for other optional implementation manners of the random access device, reference may be made to the relevant content of the first aspect above, which will not be described in detail here.

It can be seen that the terminal device requests the second random access configuration information by sending the first random access request message, and then the terminal device uses the random access preamble and random access resource in the second random access configuration information to access the network . Since the random access preamble and random access resources in the second random access configuration information are broadcast to the terminal device, after the terminal device is disconnected from the source access network device, it connects to the target access network device for random access. When used when entering, because the probability that different users are disconnected from the source access network device and connected to the same target access network device at the same time is very small, therefore, the terminal device can quickly access the network. And the random access preamble and random access resources in the second random access configuration information are determined according to the first random access request message, so compared with the prior art, the consumption of random access resources can be reduced.

In a sixth aspect, the embodiment of the present application provides a random access device, and the random access device includes:

A receiving unit, configured to receive a first random access request message from a terminal device, where the first random access request message includes a first random access preamble, and the first random access request message is used to request a second random access configuration information;

A sending unit, configured to broadcast a first random access response message, where the first random access response message includes second random access configuration information.

In addition, in this aspect, for other optional implementation manners of the random access device, reference may be made to the relevant content of the above-mentioned second aspect, which will not be described in detail here.

It can be seen that the access network device determines the second random access configuration information by receiving the first random access request message, and then sends the second random access configuration information to the terminal device, so that the terminal device accesses the network. Since the random access preamble and random access resources in the second random access configuration information are broadcast to the terminal device, after the terminal device is disconnected from the source access network device, it connects to the target access network device for random access. When used when entering, because the probability that different users are disconnected from the source access network device and connected to the same target access network device at the same time is very small, therefore, the terminal device can quickly access the network. And the random access preamble and the random access resources in the second random access configuration information are determined according to the first random access request message, so compared with the prior art, the consumption of random access resources can be reduced.

In the seventh aspect, the embodiment of the present application provides a random access device, and the random access device includes:

A sending unit, configured to send a second random access request message to the access network device, where the second random access request message includes a third random access preamble, and the second random access request message is in the third random access resource and the second random access request message is used to request access to the access network device;

The receiving unit is configured to receive a third random access response message from the access network device, where the third random access response message instructs the terminal device to access the access network device through the third random access preamble.

In addition, in this aspect, for other optional implementation manners of the random access device, reference may be made to the relevant content of the above third aspect, which will not be described in detail here.

It can be seen that the terminal device can quickly access the network by sending the dedicated third random access preamble to perform non-contention random access.

In an eighth aspect, the embodiment of the present application provides a random access device, and the random access device includes:

A receiving unit, configured to receive a second random access request message from the terminal device, where the second random access request message includes a third random access preamble, and the second random access request message is used to request access to the access network equipment;

A sending unit, configured to send a third random access response message to the terminal device, where the third random access response message instructs the terminal device to access the access network device through the third random access preamble.

In addition, in this aspect, for other optional implementation manners of the random access device, refer to the relevant content of the fourth aspect above, and details are not described here again.

It can be seen that the terminal device performs non-contention random access through the dedicated third random access preamble, and can quickly access the network.

In the ninth aspect, the embodiment of the present application provides a terminal device, the terminal device includes a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, and the computer The program includes program instructions, and the processor is configured to invoke the program instructions to execute the method described in the first aspect, or to execute the method described in the third aspect.

In a tenth aspect, the embodiment of the present application provides an access network device, the access network device includes a processor and a memory, and the processor and the memory are connected to each other, where the memory is used to store a computer program, and the computer program includes program instructions, The processor is configured to invoke program instructions to execute the method described in the second aspect, or to execute the method described in the fourth aspect.

In the eleventh aspect, the embodiment of the present application provides a chip, the chip includes a processor and a data interface, and the processor reads the instructions stored in the memory through the data interface to execute the method as described in the first aspect, or execute The method described in the second aspect, or execute the method described in the third aspect, or execute the method described in the fourth aspect.

In a twelfth aspect, the embodiment of the present application provides a chip module, the chip module includes the chip as described in the eleventh aspect.

In a thirteenth aspect, the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by the processor, the processor performs the following steps: The method described in one aspect, or execute the method described in the second aspect, or execute the method described in the third aspect, or execute the method described in the fourth aspect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic flowchart of a random access method provided in an embodiment of the present application;

FIG. 3 is a schematic flowchart of a random access method provided by an embodiment of the present application applied to a scenario where a terminal device is disconnected from a source access network device and then accesses a target access network device;

FIG. 4 is a schematic flowchart of another random access method provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a random access device provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

Fig. 7 is a schematic structural diagram of an access network device provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element. In addition, different implementations of the present application Components, features, and elements with the same name in the example may have the same meaning, or may have different meanings, and the specific meaning shall be determined based on the explanation in the specific embodiment or further combined with the context in the specific embodiment.

It should be understood that, in this article, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article indicates that the contextual objects are an "or" relationship.

It should be understood that in this article, "plurality" refers to two or more than two.

It should be understood that in this article, the first, second, and other descriptions appearing are only for the purpose of illustrating and distinguishing the description objects, and there is no order, nor does it represent a special limitation on the number of devices in this embodiment of the application, and cannot constitute Any limitations on the examples of this application.

It should be understood that in this article, "connection" refers to various connection methods such as direct connection or indirect connection to realize communication between devices, which is not limited in this embodiment of the present application.

It should be understood that in this paper, the one-way communication link from the access network device to the terminal device is defined as the downlink, the data transmitted on the downlink is the downlink data, and the transmission direction of the downlink data is called the downlink direction; and the terminal device The one-way communication link to the access network device is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is called the uplink direction.

The technical solution of the present application can be applicable to the third generation mobile communication (3th generation, 3G) system, the fourth generation mobile communication (45th generation, 4G) system, and can also be applicable to the fifth generation mobile communication (5th generation, 5G) system , which can also be called a new air interface (New Radio, NR) system, or a sixth generation mobile communication (6th generation, 6G) system or other communication systems in the future.

The technical solutions of the present application are also applicable to different network architectures, including but not limited to relay network architectures, dual-link architectures, and vehicle-to-everything communication architectures.

In the embodiment of the present application, terminal equipment may refer to various forms of user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (Mobile Station, MS), remote station, remote terminal , mobile device, user terminal, wireless communication device, user agent, or user device. The terminal equipment can also be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or in the future evolution of Public Land Mobile Networks (PLMN) The terminal device and the like are not limited in this embodiment of the present application.

In the embodiment of the present application, the access network device may be a base station (Base Station, BS), also referred to as a base station device, which is a device deployed in a radio access network (Radio Access Network, RAN) to provide wireless communication functions device. For example, the equipment providing base station function in 2G network includes Base Transceiver Station (BTS), the equipment providing base station function in 3G network includes Node B (NodeB), and the equipment providing base station function in 4G network includes evolved Node B (evolved NodeB, eNB), in the wireless local area network (Wireless Local Area Networks, WLAN), the device that provides the function of the base station is the access point (Access Point, AP), the device that provides the function of the base station in 5G gNB, and Continued evolution of Node B (ng-eNB), in which NR technology is used for communication between gNB and terminals, and Evolved Universal Terrestrial Radio Access (E-UTRA) is used between ng-eNB and terminals technology to communicate, both gNB and ng-eNB can be connected to the 5G core network. The access network equipment in this embodiment of the present application also includes equipment that provides base station functions in future new communication systems.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. The communication system may include, but not limited to, one or more access network devices and one or more terminal devices, as shown in Figure 1, an access network device 101, an access network device 102, and a terminal device 103 are taken as examples, wherein , the terminal device 103 may establish a wireless link with the access network device 101 for communication, and the terminal device 103 may also establish a wireless link with the access network device 102 for communication. The communication system shown in FIG. 1 includes but is not limited to access network equipment and terminal equipment, and may also include other communication equipment. The number and form of equipment shown in FIG. 1 are for example and do not constitute a limitation to this embodiment of the application. Wherein, the access network device in FIG. 1 is an example of a base station, and the terminal device is an example of a mobile phone.

In the communication system shown in Figure 1, when the access network device 101 is an outdoor macro base station, and the access network device 102 is an indoor small base station or access point (Access Point, AP), the terminal device moves from outdoor to indoor . In order to ensure the quality of service of the terminal device, the terminal device needs to switch from the access network device 101 to the access network device 102 . If the indoor small base station accesses the Internet in a wired manner, there is no Xn interface between the access network device 101 and the access network device 102 . As a result, when the terminal device 103 switches from the access network device 101 to the access network device 102, the terminal device 103 needs to disconnect from the access network device 101 first, and then re-initiate random access to the access network device 102 to access Access network device 102 . At this time, it is necessary to access the access network equipment through a competitive random access method, so the service interruption time will be relatively long, and the competitive random access method needs to reserve more resources for random access, including the random access preamble (preamble ) codes and random access resources, affecting user experience.

The present application provides a random access method, which can be applied to the communication system shown in FIG. 1 . When the terminal device switches from the access network device 101 to the access network device 102, the terminal device sends a first random access request message to the access network device 102, and the access network device 102 sends the first random access request message after receiving the first random access request message The second random access configuration information is sent to the terminal device. The terminal device uses the dedicated random access preamble and/or random access resource in the second random access configuration information to access the access network device 102 . It is beneficial to reduce the consumption of random access resources, and at the same time enable the terminal equipment to quickly access the network.

The present application also provides a random access method, which can also be applied to the communication system shown in FIG. 1 . When the terminal device switches from the access network device 101 to the access network device 102, the terminal device sends a dedicated third random access preamble and/or third random access resources to the access network device 102, thereby accessing the network, The terminal equipment can be quickly connected to the network.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a random access method provided by an embodiment of the present application. The random access method can be applied to the communication system shown in FIG. 1, and the interaction between the access network device and the terminal device point of view is explained. The random access method includes the following steps:

S201. The terminal device sends a first random access request message to the access network device; correspondingly, the access network device receives the first random access request message from the terminal device.

Wherein, the first random access request message includes a first random access preamble. The first random access preamble is sent on the first random access resource, and the specific first random access resource may be a physical random access channel (Physical Random Access Channel, PRACH) resource, and the specific PRACH resource includes a time-frequency domain The resource, for example, the time domain resource refers to a random access opportunity (Random Access Channel occasion, RACH occasion) where the random access preamble is located. The first random access request message is sent on the first random access resource, and the first random access request message is used to request second random access configuration information. The second random access configuration information includes one or more dedicated random access preambles, or the second random access configuration information includes one or more second random access resources, or the second random access configuration information includes One or more dedicated random access preambles and one or more second random access resources. For example, the second random access configuration information includes one or more dedicated random access preambles and one or more second random access resources. At this time, the terminal device may use the dedicated random access preamble and the second random access resource in the second random access configuration information to perform random access. That is to say, before the terminal device formally initiates a random access request to the access network device, the terminal device first sends a first random access request message to the access network device, which is used to request the preamble code and /or PRACH resources.

In a possible implementation manner, first random access configuration information is acquired, where the first random access configuration information includes one or more first random access preambles.

In another possible implementation manner, the first random access configuration information includes one or more first random access resources.

In another possible implementation manner, the first random access configuration information includes one or more first random access preambles and one or more first random access resources.

In a possible implementation manner, the first random access configuration information is broadcast by the access network device, or the first random access configuration information is received by the access network device when receiving the first random access configuration information sent by the terminal device. The request message is configured in advance, that is, pre-configured, or the first random access configuration information is specified by the protocol. It can be seen from this that the first random access preamble and/or the first random access resource in the first random access configuration information is stipulated in the protocol, broadcast by the access network device, or predefined. Therefore, the access network device After receiving the random access request carrying the first random access preamble, it can be identified that the random access request is used to request the second random access configuration information. Optionally, the access network device may identify that the random access request is the first random access request through the random access preamble, and may also identify that the random access request is the first random access request through the first random access resource. Access request. Optionally, the first random access preamble and the first random access resources in the first random access configuration information may be only a small amount, so that random access resources can be saved. For example, the first random access configuration information includes one or two first random access preambles and one or two first random access resources.

In a possible implementation manner, the first random access configuration information is used when the terminal device disconnects from the source access network device and accesses the target access network device to perform random access. Specifically, after the terminal device detects that it is disconnected from the source access network device, and after detecting that there is a new access network device that meets the cell selection/cell reselection criteria, it will use the first random access network device allocated by the target access network device. Configure the random access preamble and PRACH resources in the information, and send the first random access request message to the target access network device.

In a possible implementation manner, the dedicated random access preamble and the second random access resource in the second random access configuration information are allocated by the access network device according to the first random access request message, and are specially used for A scenario where a terminal device connects to a target access network device for random access after being disconnected from the source access network device. The second random access resource may be a PRACH resource, and a dedicated random access preamble may be carried on the second random access resource for transmission. Because the dedicated random access preamble and the second random access resource are broadcast to the terminal device, after the terminal device is disconnected from the source access network device, it is used when connecting to the target access network device for random access, Since the probability that different users are disconnected from the source access network device and connected to the same target access network device at the same time is very small, the terminal device can quickly access the network when using a dedicated random access preamble to access the network.

In a possible implementation manner, the access network device determines the second random access configuration information according to the first random access preamble in the first random access request message. For example, the access network device receives the first random access request message, and the access network device identifies the random access resource according to the random access preamble in the first random access request message The random access request is used to request second random access configuration information. Therefore, the access network device determines that the second random access configuration information includes one or more dedicated random access preambles, or the access network device determines that the second random access configuration information includes one or more second random access preambles. access resources, or the access network device determines that the second random access configuration information includes one or more dedicated random access preambles and one or more second random access resources.

In a possible implementation manner, when the access network device receives multiple first random access request messages, the access network device determines to send a corresponding number of dedicated random access preambles and/or a corresponding number of first random access request messages. Two random access resources. For example, the access network device receives two first random access request messages, and the access network device determines to send two dedicated random access preambles and two second random access resources. The number of dedicated random access preambles and random access resources to be sent is determined by the first random access request message. Compared with directly sending multiple random access preambles and random access resources, random access can be saved. Resources.

In a possible implementation manner, one or more first random access preambles in the first random access configuration information are different from random access preambles in the third random access configuration information. For example, one or more first random access preambles configured in advance by the access network device in this embodiment of the present application are included in the first random access request message, and are used to request the second random access configuration information. The third random access configuration information is existing random access configuration information, which may be configuration information of contention random access, or configuration information of non-contention random access. That is to say, the one or more first random access preambles configured in advance by the access network device in this embodiment are different from the random access preambles used for random access in the prior art.

In another possible implementation manner, the one or more dedicated random access preambles in the second random access configuration information are different from the random access preambles in the third random access configuration information. For example, in the embodiment of the present application, one or more dedicated random access preambles in the second random access configuration information may be determined according to the first random access request message, while the third random access configuration information is the existing The random access configuration information may be configuration information of contention random access, or configuration information of non-contention random access. Then, the dedicated random access preamble in the embodiment of the present application is different from the random access preamble in the prior art.

In another possible implementation manner, one or more first random access resources in the first random access configuration information are different from random access resources in the third random access configuration information. For example, the one or more PRACH resources configured in advance by the access network device in this embodiment of the present application include one or more first random access resources, and the first random access preamble is sent on the first random access resources, Used to request second random access configuration information. The third random access configuration information is existing random access configuration information, which may be configuration information of contention random access, or configuration information of non-contention random access. Then, the one or more PRACH resources configured in advance by the access network device in this embodiment are different from the random access resources used for random access in the prior art.

In another possible implementation manner, the one or more dedicated random access resources in the second random access configuration information are different from the random access resources in the third random access configuration information. For example, one or more second random access resources in the second random access configuration information in this embodiment of the present application may be determined according to the first random access request message. The third random access configuration information is the existing random access configuration information, which can be the configuration information of the contention random access, or the configuration information of the non-competition random access. In the embodiment of the present application, the second random access The one or more second random access resources in the configuration information are different from the random access resources used for random access in the prior art.

S202. The access network device broadcasts a first random access response message; correspondingly, the terminal device receives the first random access response message broadcast from the access network device.

In a possible implementation manner, the terminal device determines resources used for random access according to the second random access configuration information in the first random access response message. For example, the terminal device determines the second random access preamble according to the second random access configuration information in the first random access response message. The second random access preamble is selected from dedicated random access preambles, and is used for random access. That is to say, when the first random access response message broadcast by the access network device contains multiple dedicated random access preambles, the terminal device can select one random access preamble among the multiple dedicated random access preambles. preamble for random access.

In this embodiment of the application, the terminal device requests the second random access configuration information by sending the first random access request message, and then the terminal device uses the random access preamble and random access resource in the second random access configuration information to access the network. Since the random access preamble and random access resources in the second random access configuration information are broadcast to the terminal device, after the terminal device is disconnected from the source access network device, it connects to the target access network device for random access. When used when entering, because the probability that different users are disconnected from the source access network device and connected to the same target access network device at the same time is very small, therefore, the terminal device can quickly access the network. And the random access preamble and the random access resource in the second random access configuration information are determined according to the first random access request message. Therefore, the access network device can send the second random access configuration information according to the situation, so that the consumption of random access resources can be reduced.

For example, the random access method described in FIG. 2 may be applicable to a scenario where a terminal device accesses an indoor access network device from an outdoor access network device, and the terminal device works in a dual card single communication scenario. In this scenario, there is no Xn interface between the outdoor access network device and the indoor access network device. When the terminal device works in dual-card single-pass mode, the terminal device can maintain connection with the outdoor access network device and the indoor access network device at the same time. When the terminal device is exchanging data with the outdoor access network device, it can perform random access and access to the indoor access network device. When the terminal device successfully connects to the indoor access network device, it disconnects from the outdoor Data interaction between access network devices. Therefore, the end device maintains dual connectivity for a while.

As shown in FIG. 3, FIG. 3 is a schematic flow diagram of a random access method provided by an embodiment of the present application applied to a scenario where a terminal device is disconnected from a source access network device and then accesses a target access network device. In this embodiment, when the random access method described in FIG. 2 is applied to the above scenario as an example, the following steps are included:

S301. The terminal device sends a first random access request message to the access network device, where the first random access request message includes a first random access preamble; correspondingly, the access network device receives the first random access request message from the terminal device. Random Access Request message.

S302. The access network device broadcasts a first random access response message, where the first random access response message includes: one or more dedicated random access preambles and/or one or more second random access resources; correspondingly, the terminal device receives the first random access response message broadcast from the access network device.

Wherein, for specific implementation manners of S301 and S302, refer to S201 and S202 in the embodiment shown in FIG. 2 , which will not be repeated here.

S303. The terminal device sends the second random access preamble to the access network device; correspondingly, the access network device receives the second random access preamble from the terminal device.

Wherein, the second random access preamble may be sent on the second random access resource. The terminal device sends the second random access preamble to the access network device to perform non-contention random access.

S304. The access network device sends a second random access response message to the terminal device; correspondingly, the terminal device receives the second random access response message from the access network device.

In a possible implementation manner, after the access network device receives the second random access preamble, the access network device determines the second random access response message. Wherein, the second random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink grant (Uplink Grant, UL Grant) resource, temporary cell radio network temporary identifier (Temporary-Cell Radio Network Temporary Identifier, T-CRNTI). Wherein, the timing adjustment instruction is used to ensure that the uplink signals of different terminal devices arrive at the access network device at the same time. The preamble index is the index number of the random access preamble detected by the access network device. The uplink grant UL Grant resource is the initial uplink resource allocation and is mainly used to send message 3 (Message3, MSG3). The temporary radio network temporary identity of the temporary cell is used to complete the contention resolution process. The medium access control layer (Medium Access Control, MAC) layer of the access network device generates the second random access response message, and sends it on the downlink shared channel (Downlink Shared Channel, DL-SCH).

If the preamble index in the second random access response message received by the terminal device corresponds to the second random access preamble sent by itself, the terminal device uses a timing adjustment instruction and starts a corresponding contention resolution process. If the terminal device correctly receives the second random access response message, the random access process ends, and the terminal device successfully accesses the network. If the terminal device does not correctly receive the second random access response message, the terminal device will re-perform step S303, that is, re-send the second random access preamble, and re-perform non-contention random access.

Optionally, when there are multiple terminal devices that need to move from outdoor access network devices to indoor access network devices, the method further includes steps S305-S306.

S305, the terminal device sends message 3 to the access network device; correspondingly, the access network device receives message 3 from the terminal device.

MSG3 carries a User Equipment Identity Document (UE-ID). The radio resource control (Radio Resource Control, RRC) layer of the terminal device generates an RRC connection request (RRC Connection Request), and the terminal device maps the RRC Connection Request to the common control channel ( Common Control Channel, CCCH).

S306, the access network device sends message 4 to the terminal device; correspondingly, the terminal device receives message 4 from the access network device.

Message 4 (Message4, MSG4) carries RRC Contention Resolution (RRC Contention Resolution). RRC Contention Resolution is generated by the RRC layer of the access network device and mapped to CCCH or Dedicated Control Channel (Dedicated Control Channel, DCCH) on DL-SCH ), the terminal device correctly receives MSG4 to complete the contention resolution.

Please refer to FIG. 4 . FIG. 4 is a schematic flowchart of another random access method provided by an embodiment of the present application. The random access method can be applied to the communication system shown in FIG. 1 , and the interaction between an access network device and a terminal device is used for illustration. The random access method includes:

S401. The terminal device sends a second random access request message to the access network device; correspondingly, the access network device receives the second random access request message from the terminal device.

Wherein, the second random access request message includes a third random access preamble, and the third random access preamble may be used during non-contention random access, and may be sent on a non-contention third random access resource . The second random access request message is used to request access to the access network device. The third random access preamble and the third non-contention random access resources can be understood as resources dedicated to performing non-contention random access by accessing from the indoor target access network device after being disconnected from the outdoor source access network device . The third random access preamble may be selected from multiple non-contention third random access preambles in the fourth random access configuration information. Wherein, the fourth random access configuration information includes multiple non-contention third random access preambles and/or multiple non-contention third random access resources, and the non-contention third random access resources may be PRACH resources. The non-contention third random access preamble and the non-contention third random access resources configured in the fourth random access configuration information are connected to the indoor target access network device after being disconnected from the outdoor source access network device, Dedicated resources for non-contention random access. For example, when a terminal device needs to perform random access, it may select one of the multiple non-contention third random access preambles in the fourth random access configuration information as the third random access preamble, and then use the first Three random access preambles for random access. Using the third random access preamble to perform non-contention random access can enable the terminal device to quickly access the network.

In a possible implementation manner, the fourth random access configuration information may be broadcast by the access network device, or the fourth random access configuration information is received by the access network device when receiving the third random access configuration information sent by the terminal device. It is configured in advance before entering the preamble, that is, pre-configured, or the fourth random access configuration information is specified by the protocol. That is to say, the multiple non-contention third random access preambles and the multiple non-contention third random access resources in the fourth random access configuration information are dedicated.

In a possible implementation manner, the multiple non-contention third random access preambles in the fourth random access configuration information are different from the random access preambles in the third random access configuration information. For example, the multiple non-contention third random access preambles in the fourth random access configuration information in the embodiment of the present application are pre-configured random access preambles for non-contention random access, and the third The random access configuration information is existing random access configuration information, and may be configuration information of contention random access, or configuration information of non-contention random access. Then, the multiple non-contention third random access preambles in the fourth random access configuration information in the embodiment of the present application are different from the random access preambles used for random access in the prior art.

In another possible implementation manner, the multiple non-contention third random access resources in the fourth random access configuration information are different from the random access resources in the third random access configuration information. For example, the multiple non-contention third random access resources in the embodiment of the present application are random access resources configured in advance for non-contention random access, and the third random access configuration information is the existing random access resources The access configuration information may be configuration information of contention random access, or configuration information of non-contention random access. Then, the multiple non-competition third random access resources in the fourth random access configuration information in the embodiment of the present application are different from the random access resources used for random access in the prior art.

S402. The access network device sends a third random access response message to the terminal device; correspondingly, the terminal device receives the third random access response message from the access network device.

In a possible implementation manner, the access network device determines a third random access response message according to the second random access request message, and the third random access response message indicates whether the terminal device successfully accesses the access network device. Wherein, the third random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink permission UL Grant resource, temporary cell wireless network temporary identifier. The MAC layer of the access network device generates the third random access response message and sends it on the DL-SCH.

If the preamble index in the third random access response message received by the terminal device corresponds to the third random access preamble sent by itself, the terminal device uses a timing adjustment instruction and starts a corresponding contention resolution process. If the terminal device correctly receives the third random access response message, the random access process ends, and the terminal device successfully accesses the network. If the terminal device does not correctly receive the third random access response message, then the terminal device will perform step S401 again, that is, resend the third random access preamble, and perform non-contention random access again.

In the embodiment of the present application, the terminal device performs non-contention random access by sending a dedicated third random access preamble, so that the terminal device can quickly access the network.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a random access apparatus provided by an embodiment of the present application. The random access apparatus 500 includes: a sending unit 501 and a receiving unit 502 .

The sending unit 501 is configured to send a first random access request message to an access network device, where the first random access request message includes a first random access preamble, and the first random access request message is stored in the first random access resource The first random access request message is used to request the second random access configuration information.

The receiving unit 502 is configured to receive a first random access response message broadcast by an access network device, where the first random access response message includes second random access configuration information.

In an optional implementation manner, the first random access configuration information is broadcast by the access network device, or the first random access configuration information is broadcast by the access network device after receiving the first random access request message The configuration information previously configured in advance, that is, pre-configured, or the first random access configuration information is specified by the protocol.

In an optional implementation manner, the sending unit 501 is further configured to send a second random access preamble to the access network device, where the second random access preamble is sent on the second random access resource; the second The random access preamble is selected from one or more dedicated random access preambles, and the second random access preamble is used for random access; the receiving unit 502 is also used to receive The second random access response message of the device, the second random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink grant UL Grant resource, temporary cell wireless network temporary identifier.

For the relevant content of this implementation manner, refer to the relevant content of the foregoing method embodiments. No more details here.

In another embodiment, in the random access apparatus 500 shown in FIG. 5 , the receiving unit 502 is configured to receive a first random access request message from a terminal device, where the first random access request message includes a first random access request message Entering the preamble, the first random access request message is used to request the second random access configuration information.

The sending unit 501 is configured to broadcast a first random access response message, where the first random access response message includes second random access configuration information.

In an optional implementation manner, the first random access preamble is determined according to first random access configuration information, where the first random access configuration information is broadcast by an access network device, or the first The random access configuration information is configured in advance by the access network device before receiving the first random access request message, that is, pre-configured, or the first random access configuration information is specified by the protocol.

In an optional implementation manner, the receiving unit 502 is further configured to receive a second random access preamble from the terminal device, where the second random access preamble is sent on the second random access resource; the second The random access preamble is selected from one or more dedicated random access preambles, and the second random access preamble is used for random access; the sending unit 501 is also used to send the second A random access response message, the second random access response message includes one or more of the following: a timing adjustment instruction, a preamble index, an uplink grant UL Grant resource, and a temporary cell wireless network temporary identifier.

In another embodiment, in the random access apparatus 500 shown in FIG. 5 , the sending unit 501 is configured to send a second random access request message to the access network device, and the second random access request message includes the third random access request message. The preamble is inserted, and the second random access request message is sent on the third random access resource, and the second random access request message is used to request access to the access network device.

The receiving unit 502 is configured to receive a third random access response message from the access network device, where the third random access response message indicates whether the terminal device successfully accesses the access network device.

In an optional implementation manner, the third random access preamble is determined according to fourth random access configuration information, where the fourth random access configuration information is broadcast by the access network device, or the fourth The random access configuration information is configured in advance by the access network device before receiving the third random access preamble, that is, pre-configured, or the fourth random access configuration information is specified by the protocol.

In another embodiment, in the random access apparatus 500 shown in FIG. 5 , the receiving unit 502 is configured to receive a second random access request message from a terminal device, and the second random access request message includes a third random access request message. An access preamble, where the second random access request message is used to request access to the access network device.

The sending unit 501 is configured to send a third random access response message to the terminal device, where the third random access response message indicates whether the terminal device successfully accesses the access network device.

Please refer to FIG. 6 . FIG. 6 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device 600 includes: a processor 601 and a memory 602, and the processor 601 and the memory 602 are connected through one or more communication buses.

The above-mentioned processor 601 may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) ), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

The memory described above may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile 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), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of Random Access Memory (RAM) are available such as Static RAM (SRAM), Dynamic Random Access Memory (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 Access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM).

The processor 601 is configured to support the terminal device to perform corresponding functions of the terminal device in the method described in FIG. 2 . The above-mentioned memory 602 may include a read-only memory and a random-access memory, and provides computer programs and data to the processor 601 . A portion of memory 602 may also include non-volatile random access memory. Wherein, when the processor 601 invokes the computer program, it is used to execute:

Sending a first random access request message to an access network device, where the first random access request message includes a first random access preamble, where the first random access request message is sent on a first random access resource, and the first random access request message is sent on a first random access resource. The random access request message is used to request second random access configuration information;

The first random access configuration information is specified by a protocol.

In another embodiment, the processor 601 is configured to support the terminal device to perform corresponding functions of the terminal device in the method described in FIG. 4 . The above-mentioned memory 602 may include a read-only memory and a random-access memory, and provides computer programs and data to the processor 601 . A portion of memory 602 may also include non-volatile random access memory. Wherein, when the processor 601 invokes the computer program, it is used to execute:

sending a second random access request message to the access network device, where the second random access request message includes a third random access preamble, where the second random access request message is sent on a third random access resource, and the second The random access request message is used to request access to the access network device;

Receive a third random access response message from the access network device, where the third random access response message instructs the terminal device to access the access network device through the third random access preamble.

Please refer to FIG. 7, which is a schematic structural diagram of an access network device provided by an embodiment of the present application. The access network device 700 includes: a processor 701 and a memory 702, and the processor 701 and the memory 702 are connected through one or more communication buses.

The above-mentioned processor 701 may be a central processing unit (Central Processing Unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) ), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

The memory described above may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile 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), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of Random Access Memory (RAM) are available such as Static RAM (SRAM), Dynamic Random Access Memory (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 Access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM)

The processor 701 is configured to support the access network device to perform the corresponding function of the access network device in the method described in FIG. 2 . The above-mentioned memory 702 may include a read-only memory and a random-access memory, and provides computer programs and data to the processor 701 . A portion of memory 702 may also include non-volatile random access memory. Wherein, when the processor 701 invokes the computer program, it is used to execute:

Receive a first random access request message from a terminal device, where the first random access request message includes a first random access preamble, where the first random access request message is used to request second random access configuration information;

The first random access configuration information is specified by a protocol.

In another embodiment, the processor 701 is configured to support the access network device to perform the corresponding function of the access network device in the method described in FIG. 4 . The above-mentioned memory 702 may include a read-only memory and a random-access memory, and provides computer programs and data to the processor 701 . A portion of memory 702 may also include non-volatile random access memory. Wherein, when the processor 701 invokes the computer program, it is used to execute:

Receive a second random access request message from the terminal device, where the second random access request message includes a third random access preamble, and the second random access request message is used to request access to the access network device.

An embodiment of the present application provides a chip. The chip includes: processor and memory. Wherein, the number of processors may be one or more, and the number of memories may be one or more. By reading the instructions and data stored in the memory, the processor can execute the aforementioned random access method as shown in FIG. 2 or FIG. 4 , and the steps executed in related implementations.

The embodiment of the present application also provides a chip module, the chip module includes the above-mentioned chip, and can execute the above random access method as shown in FIG. 2 or FIG. 4 , and the steps executed in related implementations.

The embodiment of the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a processor, the random access method shown in FIG. 2 or FIG. 4 above can be executed, and related implementation methods steps performed.

The computer-readable storage medium may be an internal storage unit of the terminal device or access network device described in any of the foregoing embodiments, such as a hard disk or a memory of the device. The computer-readable storage medium may also be an external storage device of the terminal device or access network device, such as a plug-in hard disk equipped on the device, a smart memory card (Smart Media Card, SMC), a secure digital ( Secure Digital (SD) card, flash memory card (Flash Card), etc. Further, the computer-readable storage medium may also include both an internal storage unit of the terminal device or the access network device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal device or access network device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor medium may be a solid state drive.

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Wired or wireless transmission to another website site, computer, server or data center.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are only illustrative; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in various embodiments of the present invention.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

What is disclosed above is only a preferred embodiment of the application, and of course it cannot limit the scope of rights of the application. Those of ordinary skill in the art can understand the whole or part of the process of realizing the above embodiments, and according to the rights of the application The equivalent changes required are still within the scope of the application.

Claims

A random access method, characterized in that the method comprises:

sending a first random access request message to an access network device, where the first random access request message includes a first random access preamble, and where the first random access request message is sent on a first random access resource , the first random access request message is used to request second random access configuration information;

Receive a first random access response message broadcast by the access network device, where the first random access response message includes the second random access configuration information.
The method according to claim 1, wherein before sending the first random access request message to the access network device, the method further comprises:

Acquire first random access configuration information, where the first random access configuration information includes one or more first random access preambles, and/or, one or more first random access resources, where the first The random access resource refers to the time-frequency domain resource where the first random access preamble is located.
The method according to claim 2, wherein the first random access configuration information is broadcast by the access network device, or

The first random access configuration information is configured in advance by the access network device before receiving the first random access request message, or

The first random access configuration information is specified by a protocol.
The method according to claim 1, wherein the second random access configuration information includes: one or more dedicated random access preambles, and/or one or more second random access resources .
The method according to claim 2 or 3, wherein the one or more first random access preambles in the first random access configuration information and the random access preamble in the third random access configuration information different input preambles; or,

One or more dedicated random access preambles in the second random access configuration information are different from the random access preambles in the third random access configuration information; or,

One or more first random access resources in the first random access configuration information are different from random access resources in the third random access configuration information; or,

One or more second random access resources in the second random access configuration information are different from random access resources in the third random access configuration information.
The method according to claim 4, characterized in that the method further comprises:

Sending a second random access preamble to an access network device, where the second random access preamble is sent on the second random access resource; the second random access preamble is sent on the one or selected from a plurality of dedicated random access preambles, the second random access preamble is used for random access;

Receive a second random access response message from the access network device, where the second random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink grant UL Grant resource, temporary cell wireless network Temporary ID.
A random access method, characterized in that the method comprises:

Receive a first random access request message from a terminal device, where the first random access request message includes a first random access preamble, where the first random access request message is used to request second random access configuration information ;

broadcasting a first random access response message, where the first random access response message includes the second random access configuration information.
The method according to claim 7, wherein the first random access preamble is determined according to first random access configuration information, wherein,

The first random access configuration information is broadcast by the access network device, or

The first random access configuration information is configured in advance by the access network device before receiving the first random access request message, or

The first random access configuration information is specified by a protocol.
The method according to claim 7 or 8, wherein the second random access configuration information includes: one or more dedicated random access preambles, and/or one or more second random access into resources.
The method according to claim 9, wherein the one or more first random access preambles in the first random access configuration information and the random access preamble in the third random access configuration information different code; or,

One or more dedicated random access preambles in the second random access configuration information are different from the random access preambles in the third random access configuration information; or,

One or more first random access resources in the first random access configuration information are different from random access resources in the third random access configuration information; or,

One or more second random access resources in the second random access configuration information are different from random access resources in the third random access configuration information.
The method according to claim 10, characterized in that the method further comprises:

receiving a second random access preamble from the terminal device, where the second random access preamble is sent on the second random access resource; the second random access preamble is sent on the one or a plurality of dedicated random access preambles, the second random access preamble is used for random access;

Sending a second random access response message to the terminal device, the second random access response message including one or more of the following: timing adjustment instruction, preamble index, uplink grant UL Grant resource, temporary cell wireless network temporary logo.
A random access method, characterized in that the method comprises:

sending a second random access request message to the access network device, where the second random access request message includes a third random access preamble, where the second random access request message is sent on a third random access resource, and the second The random access request message is used to request access to the access network device;

Receive a third random access response message from the access network device, where the third random access response message indicates whether the terminal device successfully accesses the access network device.
The method according to claim 12, wherein the third random access response message includes one or more of the following: timing adjustment instruction, preamble index, uplink grant UL Grant resource, temporary cell wireless network temporary identifier .
The method according to claim 12, wherein the third random access preamble is determined according to fourth random access configuration information, wherein the fourth random access configuration information is broadcast by an access network device of, or

The fourth random access configuration information is configured in advance by the access network device before receiving the third random access preamble, that is, pre-configured, or

The fourth random access configuration information is specified by the protocol.
The method according to claim 14, wherein the fourth random access configuration information includes: multiple non-contention third random access preambles, and/or multiple non-contention third random access resources .
The method according to claim 15, characterized in that the multiple non-contention third random access preambles in the fourth random access configuration information and the random access preamble in the third random access configuration information codes are different; or, the multiple non-competing third random access resources in the fourth random access configuration information are different from the random access resources in the third random access configuration information, and the fourth random access configuration information is an access The network access device is specially configured for the terminal device to connect to the target access network device for random access after disconnecting from the source access network device.
A random access device, characterized in that the random access device includes:

a sending unit, configured to send a first random access request message to an access network device, where the first random access request message includes a first random access preamble, and where the first random access request message is Sending on access resources, the first random access request message is used to request second random access configuration information;

A receiving unit, configured to receive a first random access response message broadcast by the access network device, where the first random access response message includes the second random access configuration information.
A random access device, characterized in that the random access device includes:

A receiving unit, configured to receive a first random access request message from a terminal device, where the first random access request message includes a first random access preamble, and where the first random access request message is used to request a second random access configuration information;

A sending unit, configured to broadcast a first random access response message, where the first random access response message includes the second random access configuration information.
A random access device, characterized in that the random access device includes:

A sending unit, configured to send a second random access request message to the access network device, where the second random access request message includes a third random access preamble, and the second random access request message is in the third random access resource and the second random access request message is used to request access to the access network device;

The receiving unit is configured to receive a third random access response message from the access network device, where the third random access response message indicates whether the terminal device successfully accesses the access network device.
A terminal device, characterized in that the terminal device includes a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, the computer program includes program instructions, and the The processor is configured to call the program instructions to execute the method according to any one of claims 1-6 or 12-16.
An access network device, characterized in that the access network device includes a processor and a memory, the processor and the memory are connected to each other, wherein the memory is used to store a computer program, and the computer program includes program instructions, the processor is configured to call the program instructions to execute the method according to any one of claims 7 to 11.
A chip, characterized in that the chip includes a processor and a data interface, and the processor reads instructions stored on the memory through the data interface to execute the method according to any one of claims 1 to 6 , or perform the method as described in any one of claims 7 to 11, or perform the method as described in any one of claims 12 to 16.
A chip module, characterized in that the chip module includes the chip as claimed in claim 22.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor, the processor performs the following steps: The method according to any one of claims 1 to 6, or performing the method according to any one of claims 7 to 11, or performing the method according to any one of claims 12 to 16.