CN115551108A

CN115551108A - Random access method and related device

Info

Publication number: CN115551108A
Application number: CN202110745566.7A
Authority: CN
Inventors: 范慧芳
Original assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Current assignee: Beijing Ziguang Zhanrui Communication Technology Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-12-30
Also published as: WO2023273867A1

Abstract

The embodiment of the application discloses a random access method and a related device. In the method, terminal equipment requests second random access configuration information by sending a first random access request message, and accesses access network equipment by using a random access lead code and random access resources in the second random access configuration information. The method is beneficial to reducing resource consumption of random access and simultaneously enables the terminal equipment to be quickly accessed into the network.

Description

Random access method and related device

Technical Field

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

Background

In an indoor enhanced scenario, when a terminal device moves from outdoor to indoor, the terminal device needs to be handed over from an outdoor macro base station to an indoor small base station or Access Point (AP). If the indoor small base station is accessed to the Internet in a wired mode, an Xn interface does not exist between the outdoor macro base station and the indoor small base station. Therefore, when the terminal device is switched from the outdoor macro base station to the 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 becomes a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a random access method and a related device, which are beneficial to reducing the consumption of random access resources and simultaneously enable terminal equipment to access a network more quickly.

In a first aspect, an embodiment of the present application provides a random access method, where the method includes: sending a first random access request message to access network equipment, wherein the first random access request message comprises a first random access lead code, and is sent on a first random access resource, and the first random access request message is used for requesting second random access configuration information;

and receiving a first random access response message broadcasted by the access network equipment, wherein the first random access response message comprises second random access configuration information.

In an optional implementation manner, first random access configuration information is obtained, where the first random access configuration information includes one or more first random access preamble codes and/or one or more first random access resources, and the first random access resources refer to time-frequency domain resources where the first random access preamble codes are located.

In an alternative embodiment, the first random access configuration information is broadcast by the access network device, or

The first random access configuration information is configured in advance, i.e. preconfigured, 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.

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 embodiment, one or more first random access preamble codes in the first random access configuration information are different from the random access preamble codes in the third random access configuration information; or,

one or more dedicated random access preamble codes in the second random access configuration information are different from the random access preamble codes 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 the 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 the random access resources in the third random access configuration information.

In an optional implementation manner, a second random access preamble is sent to the access network device, 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 for random access;

receiving a second random access response message from the access network equipment, wherein the second random access response message comprises one or more of the following: timing adjustment instruction, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification.

In the method, the terminal equipment requests the second random access configuration information by sending the first random access request message, and then the terminal equipment accesses the network by using the random access preamble and the random access resource in the second random access configuration information. Because the random access preamble and the random access resource in the second random access configuration information are broadcast to the terminal device, and are used when the terminal device is accessed to the target access network device for random access after being disconnected from the source access network device, the probability that different users are disconnected from the source access network device and are accessed to the same target access network device at the same time is very small, and therefore, the terminal device can be rapidly accessed to 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, so that the consumption of the random access resource can be reduced compared with the prior art.

In a second aspect, an embodiment of the present application provides a random access method, where the method includes: receiving a first random access request message from a terminal device, wherein the first random access request message comprises a first random access lead code and is used for requesting second random access configuration information;

broadcasting a first random access response message, the first random access response message including second random access configuration information.

In an alternative embodiment, 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, i.e. preconfigured, by the access network device in advance before receiving the first random access request message, or

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

In an alternative embodiment, a second random access preamble is received from the terminal device, the second random access preamble being transmitted 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 for random access;

sending a second random access response message to the terminal equipment, wherein the second random access response message comprises one or more of the following: timing adjustment instruction, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification.

In the method, the access network equipment 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 equipment, so that the terminal equipment accesses the network by using the second random access configuration information. Because the random access preamble and the random access resource in the second random access configuration information are broadcast to the terminal device, the random access preamble and the random access resource are used when the terminal device is accessed to the target access network device for random access after being disconnected from the source access network device, and because the probability that different users are disconnected from the source access network device and are accessed to the same target access network device at the same time is very small, the terminal device can be quickly accessed to 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, so that the consumption of the random access resource can be reduced compared with the prior art.

In a third aspect, an embodiment of the present application provides a random access method, where the method includes: sending a second random access request message to the access network equipment, wherein the second random access request message comprises a third random access lead code, the second random access request message is sent on a third random access resource, and the second random access request message is used for requesting to access the access network equipment;

and receiving a third random access response message from the access network equipment, wherein the third random access response message indicates whether the terminal equipment is successfully accessed to the access network equipment.

In an optional embodiment, the third random access response message includes one or more of the following: timing adjustment instruction, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification.

In an alternative embodiment, the third random access preamble is determined according to fourth random access configuration information, wherein the fourth random access configuration information is broadcasted by the access network device, or

The fourth random access configuration information is configured, i.e. preconfigured, by the access network device in advance, before receiving the third random access preamble, or

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

In an optional implementation manner, the fourth random access configuration information includes: a plurality of non-contending third random access preambles, and/or a plurality of non-contending third random access resources.

In an optional implementation manner, the plurality of non-contention third random access preamble codes in the fourth random access configuration information are different from the random access preamble codes in the third random access configuration information; or the plurality of 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 configured when the access network device is accessed to the target access network device for random access after the access network device is specially disconnected from the source access network device for the terminal device.

Therefore, in the method, the terminal equipment performs non-contention random access by sending the special third random access preamble, and can quickly access the network.

In a fourth aspect, an embodiment of the present application provides a random access method, where the method includes: receiving a second random access request message from the terminal equipment, wherein the second random access request message comprises a third random access lead code and is used for requesting to access the access network equipment;

and sending a third random access response message to the terminal equipment, wherein the third random access response message indicates whether the terminal equipment is successfully accessed to the access network equipment.

In an alternative embodiment, the third random access preamble is determined according to fourth random access configuration information, wherein the fourth random access configuration information is broadcasted 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, preconfigured, or the fourth random access configuration information is specified by a protocol.

In an optional implementation manner, the plurality of non-contention third random access preamble codes in the fourth random access configuration information are different from the random access preamble codes in the third random access configuration information; or the plurality of 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 configured when the access network device is connected to the target access network device for random access after being disconnected from the source access network device for the terminal device.

In a fifth aspect, an embodiment of the present application provides a random access apparatus, where the random access apparatus 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 sent on a first random access resource, and is used to request second random access configuration information;

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

In addition, in this aspect, reference may be made to the related matters of the first aspect for further alternative embodiments of the random access apparatus, and details are not described 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 accesses the network by using the random access preamble and the random access resource in the second random access configuration information. Because the random access preamble and the random access resource in the second random access configuration information are broadcast to the terminal device, the random access preamble and the random access resource are used when the terminal device is accessed to the target access network device for random access after being disconnected from the source access network device, and because the probability that different users are disconnected from the source access network device and are accessed to the same target access network device at the same time is very small, the terminal device can be quickly accessed to 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, so that the consumption of the random access resource can be reduced compared with the prior art.

In a sixth aspect, an embodiment of the present application provides a random access apparatus, where the random access apparatus 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 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, reference may be made to the related contents of the second aspect for further alternative embodiments of the random access device, and details are not described here.

As can be seen, 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. Because the random access preamble and the random access resource in the second random access configuration information are broadcast to the terminal device, the random access preamble and the random access resource are used when the terminal device is accessed to the target access network device for random access after being disconnected from the source access network device, and because the probability that different users are disconnected from the source access network device and are accessed to the same target access network device at the same time is very small, the terminal device can be quickly accessed to 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, so that the consumption of the random access resource can be reduced compared with the prior art.

In a seventh aspect, an embodiment of the present application provides a random access apparatus, where the random access apparatus 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 sent on a third random access resource, and is used to request access to the access network device;

a receiving unit, configured to receive a third random access response message from the access network device, where the third random access response message indicates that the terminal device accesses the access network device through the third random access preamble.

In addition, in this aspect, reference may be made to the related contents of the third aspect for further alternative embodiments of the random access device, and details are not described here.

Therefore, the terminal equipment can rapidly access the network by sending the special third random access lead code to carry out non-competitive random access.

In an eighth aspect, an embodiment of the present application provides a random access apparatus, including:

a receiving unit, configured to receive a second random access request message from a 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 an access network device;

and the sending unit is used for sending a third random access response message to the terminal equipment, wherein the third random access response message indicates that the terminal equipment accesses the access network equipment through the third random access lead code.

In addition, in this aspect, reference may be made to the related contents of the fourth aspect for other alternative embodiments of the random access apparatus, and details are not described here.

Therefore, the terminal device performs non-contention random access through the dedicated third random access preamble, and can quickly access the network.

In a ninth aspect, an embodiment of the present application provides a terminal device, where the terminal 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, and the processor is configured to call the program instructions, perform the method of the first aspect, or perform the method of the third aspect.

In a tenth aspect, an embodiment of the present application provides an access network device, where 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, and the processor is configured to call the program instructions, perform the method of the second aspect, or perform the method of the fourth aspect.

In an eleventh aspect, embodiments of the present application provide a chip, where the chip includes a processor and a data interface, and the processor reads instructions stored on a memory through the data interface to perform the method according to the first aspect, or perform the method according to the second aspect, or perform the method according to the third aspect, or perform the method according to the fourth aspect.

In a twelfth aspect, embodiments of the present application provide a chip module, which includes the chip as set forth in the eleventh aspect.

In a thirteenth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program, the computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method according to the first aspect, or to perform the method according to the second aspect, or to perform the method according to the third aspect, or to perform the method according to the fourth aspect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a flowchart illustrating a random access method according to an embodiment of the present application;

fig. 3 is a schematic flow chart illustrating a case where the random access method provided in the embodiment of the present application is 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 flowchart of another random access method provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a random access apparatus according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an access network device according to an embodiment of the present application.

Detailed Description

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

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, a reference to an element identified by the phrase "comprising one of 82308230a of 82303030, or an element defined by the phrase" comprising another identical element does not exclude the presence of the same element in a process, method, article, or apparatus comprising the element, and elements having the same designation may or may not have the same meaning in different embodiments of the application, the particular meaning being determined by its interpretation in the particular embodiment or by further reference to the context of the particular embodiment.

It should be understood that, in this document, the term "and/or" is only one type of association relationship describing an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this document indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in this context, the occurrence of "a plurality" means two or more.

It should be understood that, in the present disclosure, the first, second, etc. descriptions are only used for illustrating and differentiating the description objects, and do not represent any particular limitation to the number of devices in the embodiments of the present application, and cannot constitute any limitation to the embodiments of the present application.

It should be understood that, in this document, the occurrence of "connection" refers to various connection manners, such as direct connection or indirect connection, to implement communication between devices, and this is not limited in this embodiment of the present application.

It should be understood that, herein, a unidirectional communication link from an access network device to a terminal device is defined as a downlink, data transmitted on the downlink is downlink data, and a transmission direction of the downlink data is referred to as a downlink direction; the unidirectional communication link from the terminal device 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 referred to as an uplink direction.

The technical scheme of the application can be suitable for a third generation mobile communication (3 th generation, 3G) system, a fourth generation mobile communication (45th generation, 4G) system, a fifth generation mobile communication (5th generation, 5G) system, a New Radio (NR) system, a sixth generation mobile communication (6 th generation, 6G) system or other future communication systems.

The solution of the present application is also applicable to different network architectures, including but not limited to relay network architecture, dual link architecture, vehicle-to-any-object communication (Vehicle-to-event) architecture.

In the embodiment of the present application, a terminal device may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber Station, a Mobile Station (MS), a remote Station, a remote terminal, a Mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G Network, or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which is not limited in this embodiment.

In this embodiment, the Access Network device may be a Base Station (BS), which may also be referred to as a Base Station device, and is a device deployed in a Radio Access Network (RAN) to provide a wireless communication function. For example, the device providing a Base Station function in the 2G network includes a Base Transceiver Station (BTS), the device providing a Base Station function in the 3G network includes a node B (NodeB), the device providing a Base Station function in the 4G network includes an Evolved node B (Evolved NodeB, eNB), and in a Wireless Local Area Network (WLAN), the device providing a Base Station function is an Access Point (AP), the device providing a Base Station function in the 5G network is a gbb (ng-eNB) that continues to evolve, where the gbb and the terminal communicate with each other by using an NR technique and the ng-eNB and the terminal communicate with each other by using an Evolved Universal Terrestrial Radio Access (E-UTRA) technique, and both the gbb and the ng-eNB may be connected to the 5G core network. The access network device in the embodiment of the present application further includes a device that provides a base station function in a future new communication system, and the like.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure. The communication system may include, but is not limited to, one or more access network devices and one or more terminal devices, such as an access network device 101, an access network device 102 and a terminal device 103 in fig. 1 as an example, where 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, an access network device and a terminal device, and may further include other communication devices, and the number and form of the devices shown in fig. 1 are used for example and do not constitute a limitation to the embodiments of the present application. The access network device in fig. 1 takes a base station as an example, and the terminal device takes a mobile phone as an example.

In the communication system shown in fig. 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 (AP), the terminal device moves from outdoors to indoors. To ensure the quality of service of the terminal device, the terminal device needs to be handed over from the access network device 101 to the access network device 102. If the indoor small cell station accesses the internet by wired means, there is no Xn interface between the access network device 101 and the access network device 102. This results in that when the terminal device 103 is switched 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, and then initiate random access to the access network device 102 again to access the access network device 102. At this time, access network equipment needs to be accessed through a contention random access mode, so that service interruption time is relatively long, and more resources of random access, including random access preamble (preamble) codes and random access resources, need to be reserved in the contention random access mode, which affects 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 is switched 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 second random access configuration information to the terminal device after receiving the first random access request message. The terminal device accesses the access network device 102 using the dedicated random access preamble and/or random access resources in the second random access configuration information. The method is beneficial to reducing the consumption of random access resources and simultaneously enabling the terminal equipment to be rapidly accessed into 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 is handed over from the access network device 101 to the access network device 102, the terminal device sends a dedicated third random access preamble and/or a dedicated third random access resource to the access network device 102, so as to access the network, thereby enabling the terminal device to access the network quickly.

Referring to fig. 2, fig. 2 is a flowchart illustrating a random access method according to an embodiment of the present application, where the random access method is applicable to the communication system shown in fig. 1, and is explained from the perspective of interaction between an access network device and a terminal device. The random access method comprises the following steps:

s201, a terminal device sends a first random access request message to an access network device; correspondingly, the access network equipment receives a first random access request message from the terminal equipment.

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

In one possible embodiment, first random access configuration information is acquired, the first random access configuration information comprising one or more first random access preamble codes.

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

In another possible embodiment, 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 embodiment, 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 sent by the terminal device, i.e. preconfigured, or the first random access configuration information is specified by a protocol. It can be seen that the first random access preamble and/or the first random access resource in the first random access configuration information are protocol-specified, broadcast by the access network device, or predefined, so that the access network device can recognize that the random access request carrying the first random access preamble is used to request the second random access configuration information after receiving the random access request. Optionally, the access network device may identify that the random access request is the first random access request through a random access preamble, and may also identify that the random access request is the first random access request through the first random access resource. Optionally, the first random access preamble and the first random access resource in the first random access configuration information may be only a small amount, so that resources for random access may 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 is disconnected from the source access network device and accesses to the target access network device for random access. Specifically, after monitoring that the terminal device is disconnected from the source access network device, and detecting that a new access network device meets a cell selection/cell reselection standard, the terminal device sends a first random access request message to the target access network device by using a random access preamble and PRACH resources in first random access configuration information allocated by 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 in a scenario where the terminal device is disconnected from the source access network device and then accesses to the target access network device for random access. The second random access resource may be a PRACH resource, and the dedicated random access preamble may be borne on the second random access resource for transmission. Because the dedicated random access preamble and the second random access resource are broadcasted to the terminal device, the dedicated random access preamble and the second random access resource are used when the terminal device is switched into the target access network device for random access after being disconnected from the source access network device, and because the probability that different users are simultaneously disconnected from the source access network device and switched into the same target access network device is very small, the terminal device can be quickly switched into the network when utilizing the dedicated random access preamble to access the network.

In one possible implementation, the access network device determines the second random access configuration information according to a 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 recognizes that the random access request is used to request the second random access configuration information according to the random access preamble in the first random access request message or the random access resource where the first random access request message is located. Thus, 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 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 one possible embodiment, when the access network device receives a plurality of first random access request messages, the access network device determines to transmit a corresponding number of dedicated random access preambles and/or a corresponding number of second random access resources. For example, the access network device receives two first random access request messages, and the access network device determines to transmit two dedicated random access preambles and two second random access resources. The number of the transmitted special random access lead codes and the random access resources is determined through the first random access request message, and compared with the method of directly transmitting a plurality of random access lead codes and random access resources, the method can save the resources of random access.

In one possible embodiment, one or more of the first random access preamble codes in the first random access configuration information are different from the random access preamble codes 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 the embodiment of the present application are included in the first random access request message, and are used for requesting the second random access configuration information. The third random access configuration information is the existing random access configuration information, and may be configuration information of contention random access or configuration information of non-contention random access. That is, the one or more first random access preambles configured in advance by the access network device in the present embodiment are different from the random access preamble used in the random access in the related art.

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

In another possible embodiment, 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, in this embodiment, one or more second random access resources in the second random access configuration information 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 may be configuration information of contention random access or configuration information of non-contention random access, and one or more second random access resources in the second random access configuration information in the embodiment of the present application are different from the random access resources used in the random access in the prior art.

S202, the access network equipment broadcasts a first random access response message; correspondingly, the terminal equipment receives the first random access response message broadcasted from the access network equipment.

In a possible implementation manner, the terminal device determines the resource used when performing the 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 for performing random access. That is, when the first random access response message broadcasted by the access network device includes a plurality of dedicated random access preambles, the terminal device may select one random access preamble among the plurality of dedicated random access preambles for performing random access.

In the 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 accesses the network by using the random access preamble and the random access resource in the second random access configuration information. Because the random access preamble and the random access resource in the second random access configuration information are broadcast to the terminal device, and are used when the terminal device is accessed to the target access network device for random access after being disconnected from the source access network device, the probability that different users are disconnected from the source access network device and are accessed to the same target access network device at the same time is very small, and therefore, the terminal device can be rapidly accessed to 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 equipment can send the second random access configuration information according to the situation, and the consumption of random access resources can be reduced.

For example, the random access method described in fig. 2 may be applied to a scenario in which a terminal device accesses an indoor access network device from an outdoor access network device, and the terminal device operates in a dual-card single-pass mode. In this scenario, there is no Xn interface between the access network device outdoors and the access network device indoors. When the terminal equipment works in the dual-card single-pass mode, the terminal equipment, the outdoor access network equipment and the indoor access network equipment can be connected at the same time. When the terminal equipment is carrying out data interaction with outdoor access network equipment, random access can be carried out, the terminal equipment is accessed into indoor access network equipment, and when the terminal equipment is successfully accessed into the indoor access network equipment, the data interaction with the outdoor access network equipment is disconnected. Thus, the terminal device remains in dual connection for a period of time.

As shown in fig. 3, fig. 3 is a schematic flowchart of a scenario that a random access method provided in this embodiment is applied to a target access network device after a terminal device is disconnected from a source access network device, where in this embodiment, taking the scenario that the random access method described in fig. 2 is applied to the above scenario as an example, the method includes the following steps:

s301, a terminal device sends a first random access request message to an access network device, wherein the first random access request message comprises a first random access lead code; correspondingly, the access network equipment receives a first random access request message from the terminal equipment.

S302, the access network equipment broadcasts a first random access response message, wherein the first random access response message comprises: one or more dedicated random access preambles and/or one or more second random access resources; correspondingly, the terminal equipment receives the first random access response message broadcasted from the access network equipment.

The specific implementation manners of S301 and S302 refer to S201 and S202 in the embodiment shown in fig. 2, and are not described herein again.

S303, the terminal equipment sends a second random access lead code to the access network equipment; correspondingly, the access network equipment receives the second random access preamble from the terminal equipment.

Wherein the second random access preamble may be transmitted on a second random access resource. And the terminal equipment sends the second random access lead code to the access network equipment for non-competitive random access.

S304, the access network equipment sends a second random access response message to the terminal equipment; correspondingly, the terminal device receives a 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: a timing adjustment instruction, a preamble index, an Uplink Grant (UL Grant) resource, and a Temporary Cell Radio Network Temporary Identifier (T-CRNTI). The timing adjustment instruction is used for ensuring that the time of the uplink signals of different terminal devices reaching the access network device is consistent. The preamble index is an index number of a random access preamble code detected by the access network equipment. The UL Grant resource is an initial uplink resource allocation and is mainly used for sending a Message3 (Message 3, MSG 3). The temporary cell radio network temporary identifier is used for completing a contention resolution process. The Medium Access Control (MAC) layer of the Access network device generates a second random Access response message and transmits the second random Access response message on a Downlink Shared Channel (DL-SCH).

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

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

S305, the terminal equipment sends a message3 to the access network equipment; correspondingly, the access network device receives the message3 from the terminal device.

The MSG3 carries a User Equipment Identity (UE-ID). A 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 a Common Control Channel (CCCH) on an Uplink Shared Channel (UL-SCH) for transmission.

S306, the access network equipment sends a message4 to the terminal equipment; correspondingly, the terminal device receives the message4 from the access network device.

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

Referring to fig. 4, fig. 4 is a flowchart illustrating another random access method according to an embodiment of the present application. The random access method can be applied to the communication system shown in fig. 1, and is illustrated by the interaction between the access network device and the terminal device. The random access method comprises the following steps:

s401, the terminal equipment sends a second random access request message to the access network equipment; correspondingly, the access network equipment receives a second random access request message from the terminal equipment.

The second random access request message includes a third random access preamble, where the third random access preamble may be used for non-contention random access and may be sent on a non-contention third random access resource. The second random access request message is used for requesting access to the access network equipment. The third random access preamble and the non-contention third random access resource may be understood as resources dedicated to access from the indoor target access network device for non-contention random access after being disconnected from the outdoor source access network device. The third random access preamble may be selected from a plurality of non-competing third random access preambles in the fourth random access configuration information. The fourth random access configuration information includes a plurality of non-contention third random access preambles and/or a plurality of non-contention third random access resources, where 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 resource configured in the fourth random access configuration information are dedicated resources for performing non-contention random access by accessing to the indoor target access network device after being disconnected from the outdoor source access network device. For example, when the 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 perform random access by using the third random access preamble. The non-contention random access using the third random access preamble enables the terminal device to quickly access the network.

In one possible embodiment, the fourth random access configuration information may be broadcast by the access network device, or the fourth random access configuration information is configured in advance, i.e. preconfigured, by the access network device before receiving the third random access preamble sent by the terminal device, or the fourth random access configuration information is specified by a protocol. That is, the plurality of non-contention third random access preambles and the plurality of non-contention third random access resources in the fourth random access configuration information are dedicated.

In one possible implementation, the plurality of non-contention third random access preamble codes in the fourth random access configuration information are different from the random access preamble codes in the third random access configuration information. For example, in the embodiment of the present application, a plurality of non-contention third random access preamble codes in the fourth random access configuration information are random access preamble codes configured in advance for performing non-contention random access, and the third 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. The multiple non-contention third random access preamble in the fourth random access configuration information in the embodiment of the present application is different from the random access preamble used in the random access in the prior art.

In another possible implementation, the plurality of 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, in this embodiment of the present application, the multiple non-contention third random access resources are random access resources configured in advance for performing non-contention random access, and 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. The multiple non-contention 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 in the random access in the prior art.

S402, the access network equipment sends a third random access response message to the terminal equipment; correspondingly, the terminal device receives a 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, where 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: timing adjustment instruction, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification. The MAC layer of the access network device generates a third random access response message and transmits 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 the terminal device, the terminal device adopts the timing adjustment instruction and starts a corresponding contention resolution process. If the terminal equipment correctly receives the third random access response message, the random access process is finished, and the terminal equipment is successfully accessed to the network. If the terminal device does not correctly receive the third random access response message, the terminal device will perform step S401 again, that is, re-send the third random access preamble, and perform non-contention random access again.

In the embodiment of the application, the terminal equipment performs non-contention random access by sending the special third random access preamble, so that the terminal equipment can quickly access the network.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a random access apparatus according to an embodiment of the present disclosure. The random access apparatus 500 includes: a transmitting unit 501 and a receiving unit 502.

A sending unit 501, 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 sent on a first random access resource, and is used to request second random access configuration information.

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

In an alternative embodiment, 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, i.e. preconfigured, or the first random access configuration information is specified by a 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 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 for random access; the receiving unit 502 is further configured to 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, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification.

The relevant contents of this embodiment can be referred to the relevant contents of the above method embodiments. And will not be described in detail herein.

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 preamble, and the first random access request message is used to request second random access configuration information.

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

In an alternative embodiment, the first random access preamble is determined according to first random access configuration information, wherein the first random access configuration information is broadcasted 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, i.e. is preconfigured, 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, 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 transmitted 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 for random access; the sending unit 501 is further configured to send 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, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification.

The relevant content of this embodiment can be referred to the relevant content of the above method embodiment. And will not be described in detail herein.

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

A receiving unit 502, 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 alternative embodiment, the third random access preamble code is determined according to fourth random access configuration information, wherein the fourth random access configuration information is broadcasted 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 code, i.e. is preconfigured, or the fourth random access configuration information is specified by a 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 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.

A sending unit 501, 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.

In an alternative embodiment, the third random access preamble code is determined according to fourth random access configuration information, wherein the fourth random access configuration information is broadcasted by the access network device, or the fourth random access configuration information is configured in advance by the access network device before the third random access preamble code is received, i.e. is preconfigured, or the fourth random access configuration information is specified by a protocol.

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

The Processor 601 may be a Central Processing Unit (CPU), and may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), field-Programmable Gate arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (Static RAM), dynamic Random Access Memory (DRAM), synchronous DRAM (Synchronous DRAM, SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM, DDR SDRAM), enhanced SDRAM (Enhanced SDRAM, ESDRAM), synchronous Link DRAM (SLDRAM), and Direct bus RAM (DR RAM).

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

sending a first random access request message to access network equipment, wherein the first random access request message comprises a first random access lead code, and is sent on a first random access resource, and the first random access request message is used for requesting second random access configuration information;

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

In an optional embodiment, 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; or,

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

sending a second random access request message to the access network equipment, wherein the second random access request message comprises a third random access lead code, the second random access request message is sent on a third random access resource, and the second random access request message is used for requesting to access the access network equipment;

and receiving a third random access response message from the access network equipment, wherein the third random access response message indicates that the terminal equipment accesses the access network equipment through the third random access lead code.

In an optional embodiment, the third random access response message includes one or more of the following: timing adjustment instruction, leading index, uplink permission UL Grant resource and temporary cell wireless network temporary identification.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an access network device according to an embodiment of the present application. The access network apparatus 700 includes: the processor 701, the memory 702, the processor 701 and the memory 702 are connected by one or more communication buses.

The Processor 701 may be a Central Processing Unit (CPU), and may also be other general purpose processors, digital Signal Processors (DSP), application Specific Integrated Circuits (ASIC), field-Programmable Gate arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM, DDR SDRAM), enhanced SDRAM (ESDRAM), sync-link DRAM (SLDRAM), and Direct Rambus RAM (DR RAM)

The processor 701 is configured to support the access network device to perform corresponding functions of the access network device in the method described in fig. 2. The memory 702 may include read-only memory and 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. When the processor 701 calls the computer program, it is configured to:

receiving a first random access request message from a terminal device, wherein the first random access request message comprises a first random access lead code and is used for requesting second random access configuration information;

In an alternative embodiment, the first random access preamble code is determined according to first random access configuration information, wherein,

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

sending a second random access response message to the terminal device, wherein the second random access response message comprises one or more of the following: timing adjustment instruction, leading index, uplink Grant UL Grant resource and temporary cell wireless network temporary identification.

In another embodiment, the processor 701 is configured to support the access network device to perform corresponding functions of the access network device in the method described in fig. 4. The memory 702 may include read-only memory and random access memory, and provides computer programs and data to the processor 701. A portion of the memory 702 may also include non-volatile random access memory. When the processor 701 calls the computer program, it is configured to:

and receiving a second random access request message from the terminal equipment, wherein the second random access request message comprises a third random access lead code and is used for requesting to access the access network equipment.

The embodiment of the application provides a chip. The chip includes: a processor and a memory. The number of processors may be one or more, and the number of memories may be one or more. The processor may perform the random access method as shown in fig. 2 or fig. 4, and the steps performed by the related embodiments, by reading the instructions and data stored in the memory.

The embodiment of the present application further provides a chip module, where the chip module includes the above chip, and can execute the random access method shown in fig. 2 or fig. 4, and the steps executed by the related embodiments.

The embodiment of the application also provides a computer readable storage medium. The computer readable storage medium stores a computer program, which includes program instructions, and when the program instructions are executed by a processor, the random access method shown in fig. 2 or fig. 4 and the steps executed by the related embodiments can be executed.

The computer readable storage medium may be an internal storage unit of the terminal device or the access network device according to any of the foregoing embodiments, for example, 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 the access network device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the device. Further, the computer readable storage medium may also include both an internal storage unit and an external storage device of the terminal device or the access network device. The computer readable storage medium is used for storing the computer program and other programs and data required by the terminal device or the access network device. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

The above-described embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions described in accordance with the embodiments of the present application are produced in whole or in part when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus, and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the unit is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated in another system or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods according to the embodiments of the present invention.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A random access method, the method comprising:

sending a first random access request message to access network equipment, wherein the first random access request message comprises a first random access lead code, the first random access request message is sent on a first random access resource, and the first random access request message is used for requesting second random access configuration information;

and receiving a first random access response message broadcast by the access network equipment, wherein the first random access response message comprises the second random access configuration information.

2. The method of claim 1, wherein prior to sending the first random access request message to the access network device, the method further comprises:

acquiring first random access configuration information, wherein the first random access configuration information comprises one or more first random access lead codes and/or one or more first random access resources, and the first random access resources refer to time-frequency domain resources where the first random access lead codes are located.

3. The method of 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 by the access network equipment in advance before receiving the first random access request message, or

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

4. The method of claim 1, wherein the second random access configuration information comprises: one or more dedicated random access preambles and/or one or more second random access resources.

5. A method according to claim 2 or 3, wherein one or more first random access preamble codes in the first random access configuration information are different from the random access preamble codes in the third random access configuration information; or,

6. The method of claim 4, further comprising:

sending a second random access preamble to the access network device, the second random access preamble being sent on the second random access resource; the second random access preamble is selected among the one or more dedicated random access preambles, the second random access preamble being for random access;

receiving a second random access response message from the access network equipment, wherein the second random access response message comprises one or more of the following: timing adjustment instruction, leading index, uplink permission UL Grant resource and temporary cell wireless network temporary identification.

7. A random access method, the method comprising:

receiving a first random access request message from a terminal device, wherein the first random access request message comprises a first random access lead code, and the first random access request message is used for requesting second random access configuration information;

broadcasting a first random access response message, the first random access response message including the second random access configuration information.

8. The method of 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 equipment, or

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

9. The method according to claim 7 or 8, wherein the second random access configuration information comprises: one or more dedicated random access preambles, and/or one or more second random access resources.

10. The method of claim 9, wherein one or more first random access preamble codes in the first random access configuration information are different from random access preamble codes in the third random access configuration information; or,

11. The method of claim 10, further comprising:

receiving a second random access preamble from the terminal device, the second random access preamble being transmitted on the second random access resource; the second random access preamble is selected among the one or more dedicated random access preambles, the second random access preamble being for random access;

12. A random access apparatus, comprising:

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 sent on a first random access resource, and 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 broadcasted by the access network device, where the first random access response message includes the second random access configuration information.

13. A random access apparatus, characterized in that the random access apparatus comprises:

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.

14. A terminal device, characterized in that the terminal device comprises a processor and a memory, the processor and the memory being interconnected, wherein the memory is configured to store a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the method according to any one of claims 1 to 6.

15. An access network device, characterized in that the access network device comprises a processor and a memory, the processor and the memory being interconnected, wherein the memory is configured to store a computer program comprising program instructions, the processor being configured to invoke the program instructions to perform the method according to any of claims 7 to 11.

16. A chip comprising a processor and a data interface, the processor reading instructions stored on a memory through the data interface to perform the method of any of claims 1 to 6 or to perform the method of any of claims 7 to 11.

17. A chip module, characterized in that it comprises a chip according to claim 16.

18. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method of any of claims 1 to 6, or to perform the method of any of claims 7 to 11.