CN114599112B

CN114599112B - Random access method, device and system

Info

Publication number: CN114599112B
Application number: CN202011404557.3A
Authority: CN
Inventors: 银宇; 戚彩霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2025-05-27
Anticipated expiration: 2040-12-04
Also published as: CN114599112A; WO2022116809A1

Abstract

The application provides a random access method, a device and a system, wherein the method comprises the steps that terminal equipment generates a random access identifier, the random access identifier is used for identifying the terminal equipment in a random access process, the terminal equipment sends a first request message to an access node, the first request message comprises the random access identifier, the first request message is used for requesting to access a wireless network, the terminal equipment receives a first response message from the access node, the first response message comprises the random access identifier, the length of the random access identifier is smaller than that of a temporary mobile user identifier, and the length of the temporary mobile user identifier is larger than or equal to 64 bits. After the length of the temporary mobile user identifier is expanded, the terminal equipment generates a random access identifier meeting the length requirement, so that the terminal equipment can still normally access the wireless network in the random access process, and the random access success rate is ensured.

Description

Random access method, device and system

Technical Field

The present application relates to the field of communications, and more particularly, to a method, apparatus, and system for random access.

Background

In the random access process, the terminal equipment sends an initial uplink transmission message to the access node, and if the terminal equipment is allowed to be accessed, the access node sends a contention resolution message to the terminal equipment. Wherein, the initial uplink transmission message and the contention resolution message may both carry a radio access user identifier, which may be used to identify the terminal device in the random access procedure. The terminal equipment acquires whether the terminal equipment is successfully accessed by judging whether the wireless access user identification carried in the contention resolution message is consistent with the wireless access user identification carried in the initial uplink transmission message.

Currently, the radio access subscriber identity comprises a temporary mobile subscriber identity in its constituent structure, and the temporary mobile subscriber identity is part of a field in a globally unique temporary mobile subscriber identity. The temporary mobile subscriber identity is used to identify or find a context of the terminal device stored on the network device. In addition, a randomization field is also reserved in the temporary mobile subscriber identity, so that the globally unique temporary subscriber identity of the terminal device can be changed frequently.

With the continuous development of mobile communication technology, the current globally unique temporary user identifier allocation management mechanism cannot meet the increasing user demands. While the globally unique temporary user identity may be extended by extending the temporary mobile user identity in order to support more users. However, the expansion of the temporary mobile user identifier causes the change of the wireless access user identifier, which may further cause the access failure of the terminal device in the random access process, thereby reducing the success rate of the random access.

Disclosure of Invention

The application provides a random access method, a device and a system, which can still realize successful access of terminal equipment in the random access process under the condition of expanding the length of a temporary mobile user identifier and ensure the success rate of random access.

In a first aspect, a method for random access is provided, the method includes that a terminal device generates a random access identifier, the random access identifier is used for identifying the terminal device in a random access process, the terminal device sends a first request message to an access node, the first request message includes the random access identifier, the first request message is used for requesting to access a wireless network in the random access process, the terminal device receives a first response message from the access node, the first response message includes the random access identifier, the length of the random access identifier is smaller than the length of a temporary mobile user identifier of the terminal device, and the length of the temporary mobile user identifier is larger than or equal to 64 bits.

In the technical solution of this embodiment, in the random access process, considering that the temporary mobile subscriber identifier exceeds the limit of the message length interacted between the terminal device and the access node, the composition structure of the random access identifier sent and received by the terminal device does not directly include the temporary mobile subscriber identifier after expansion, but the terminal device generates the random access identifier itself.

According to the scheme of the embodiment of the application, when the length of the temporary mobile user identifier is larger than that of the random access identifier, the terminal equipment generates the random access identifier meeting the length requirement, so that the terminal equipment can normally access the wireless network in the random access process.

With reference to the first aspect, in some implementations of the first aspect, the terminal device sends a radio resource control RRC connection establishment complete message to the access node, where the RRC connection establishment complete message includes a service temporary mobile user identifier of the terminal device, and the service temporary mobile user identifier includes the temporary mobile user identifier and an identifier of the first access management node.

It should be understood that the RRC connection setup complete message has no length limitation, and the service temporary mobile subscriber identity after the length extension may be directly transmitted.

In the technical solution of this embodiment, after the temporary mobile subscriber identifier is extended to 64 bits or longer, the network device may allocate non-conflicting globally unique temporary subscriber identifiers to more subscribers, and may ensure enough randomized field space in the globally unique temporary subscriber identifiers, so that the security is higher.

With reference to the first aspect, in some implementations of the first aspect, the generating the random access identifier by the terminal device includes generating the random access identifier by the terminal device according to the temporary mobile subscriber identifier, or generating the random access identifier by the terminal device according to a first globally unique temporary subscriber identifier by a specific algorithm, where the temporary mobile subscriber identifier is included in a component structure of the first globally unique temporary subscriber identifier, or generating a random number by the terminal device as the random access identifier.

With reference to the first aspect, in some implementation manners of the first aspect, optionally, the generating, by the terminal device, the random access identifier according to the temporary mobile subscriber identifier includes:

In some possible implementations, the random access identity is generated according to the temporary mobile subscriber identity and a specific algorithm.

In some possible implementations, the random access identity is generated based on the identity of the first access management node, the temporary mobile subscriber identity and a specific algorithm.

In some possible implementations, the random access identity is generated based on an identity associated with the first access management node, the temporary mobile subscriber identity and a specific algorithm.

In some possible implementations, the random access identity is generated based on other fields in the serving temporary mobile subscriber identity and a specific algorithm.

In some possible implementations, the random access identity is generated from the temporary mobile subscriber identity and a specific algorithm based on a part of a field in the identity of the first access management node.

With reference to the first aspect, in certain implementation manners of the first aspect, the method further includes the terminal device sending a registration request message to the access node, where the registration request message includes a first globally unique temporary user identification, and the first globally unique temporary user identification is allocated by the first access management node.

With reference to the first aspect, in certain implementation manners of the first aspect, after the terminal device sends the registration request message to the access node, the method further includes receiving a registration accept message from the access node, where the registration accept message includes a second globally unique temporary user identifier, where the second globally unique temporary user identifier is assigned by the first access management node or a second access management node, where the second globally unique temporary user identifier is different from the first globally unique temporary user identifier, and where the first access management node is different from the second access management node.

In a second aspect, a random access method is provided, the method includes that an access node receives a first request message from a terminal device, the first request message is used for requesting to access a wireless network in a random access process, the first request message includes a random access identifier, the random access identifier is used for identifying the terminal device in the random access process, the access node sends a first response message to the terminal device, the first response message includes the random access identifier, the length of the random access identifier is smaller than the length of a temporary mobile user identifier of the terminal device, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

With reference to the second aspect, in some implementations of the second aspect, the method further includes the access node receiving a radio resource control RRC connection setup complete message from the terminal device, where the RRC connection setup complete message includes a service temporary mobile subscriber identity, where the service temporary mobile subscriber identity includes the temporary mobile subscriber identity and an identity of a first access management node, where the service temporary mobile subscriber identity is allocated by the first access management node, and the access node selecting a second access management node for the terminal device according to the service temporary mobile subscriber identity.

With reference to the second aspect, in some implementations of the second aspect, after the access node receives the RRC connection setup complete message from the terminal device, the access node selects a second access management node for the terminal device, and further includes the access node generating a first identifier according to the serving temporary mobile subscriber identifier, and when the first identifier is the same as the random access identifier, the access node selects the second access management node for the terminal device.

With reference to the second aspect, in some implementations of the second aspect, the generating, by the access node, a first identification according to the serving temporary mobile subscriber identity includes:

In some possible implementations, the first identity is generated according to the temporary mobile subscriber identity and a specific algorithm.

In some possible implementations, the temporary mobile subscriber identity and the specific algorithm generate the first identity based on an identity of the first access management node.

It will be appreciated that the manner in which the first identity is generated by the access node is exactly the same as the manner in which the random access identity is generated by the terminal device, so that the access node can verify the identity of the terminal device. When the terminal equipment generates the random access identifier according to the field except the service temporary mobile user identifier, or generates the random access identifier by using the random number, the access node cannot verify the identity of the terminal equipment in the scheme.

According to the scheme of the embodiment of the application, the access node verifies the identity of the terminal equipment after the random access process, so that the accuracy and the safety of the random access process are further improved.

With reference to the second aspect, in some implementations of the second aspect, the method further includes the access node receiving a registration request message from the terminal device, and sending the registration request message to the second access management node, where the registration request message includes a first globally unique temporary user identity assigned by the first access management node to the terminal device.

With reference to the second aspect, in certain implementation manners of the second aspect, the method further includes the access node receiving a registration accept message from the second access management node, and the access node sending the registration accept message to the terminal device, where the registration accept message includes a second globally unique temporary user identifier, where the second globally unique temporary user identifier is allocated to the terminal device by the second access management node, and where the second globally unique temporary user identifier is different from the first globally unique temporary user identifier.

In a third aspect, an apparatus for random access is provided, the apparatus comprising a processing module configured to generate a random access identifier, where the random access identifier is used to identify the terminal device during random access, a transceiver module configured to send a first request message to an access node, where the first request message includes the random access identifier, the first request message is used to request access to a wireless network during random access, and the transceiver module is further configured to receive a first response message from the access node, where the first response message includes the random access identifier, where a length of the random access identifier is less than a length of a temporary mobile user identifier, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

With reference to the third aspect, in some implementations of the third aspect, the transceiver module is further configured to send a radio resource control RRC connection setup complete message to the access node, where the RRC connection setup complete message includes a service temporary mobile user identifier of the terminal device, and the service temporary mobile user identifier includes the temporary mobile user identifier and an identifier of the first access management node.

With reference to the third aspect, in some implementations of the third aspect, the processing module is specifically configured to generate the random access identifier according to the temporary mobile subscriber identifier, or generate the random access identifier according to a first globally unique temporary subscriber identifier through a specific algorithm, where the temporary mobile subscriber identifier is included in a component structure of the first globally unique temporary subscriber identifier, or generate a random number as the random access identifier.

With reference to the third aspect, in certain implementations of the third aspect, the processing module is specifically further configured to:

With reference to the third aspect, in some implementations of the third aspect, the transceiver module is further configured to send a registration request message to the access node, where the registration request message includes a first globally unique temporary user identity, and the first globally unique temporary user identity is allocated by the first access management node.

With reference to the third aspect, in some implementations of the third aspect, the transceiver module is further configured to receive a registration accept message from the access node, where the registration accept message includes a second globally unique temporary user identity, where the second globally unique temporary user identity is assigned by the first access management node or a second access management node, where the second globally unique temporary user identity is different from the first globally unique temporary user identity, and where the first access management node is different from the second access management node.

In a fourth aspect, there is provided an apparatus for random access, the apparatus including a transceiver module configured to receive a first request message from a terminal device, where the first request message is configured to request access to a wireless network in a random access procedure, the first request message includes a random access identifier, where the random access identifier is configured to identify the terminal device in the random access procedure, and the transceiver module is further configured to send a first response message to the terminal device, where the first response message includes the random access identifier, a length of the random access identifier is smaller than a length of a temporary mobile user identifier of the terminal device, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver module is further configured to receive a radio resource control RRC connection setup complete message from the terminal device, where the RRC connection setup complete message includes a service temporary mobile subscriber identity, where the service temporary mobile subscriber identity includes the temporary mobile subscriber identity and an identity of a first access management node, and where the service temporary mobile subscriber identity is allocated by the first access management node, and the processing module selects a second access management node for the terminal device according to the service temporary mobile subscriber identity.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is further configured to generate a first identifier according to the serving temporary mobile subscriber identifier, and when the first identifier is the same as the random access identifier, the access node selects a second access management node for the terminal device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the processing module is specifically further configured to:

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver module is further configured to receive a registration request message from the terminal device, and the transceiver module is further configured to send the registration request message to the second access management node, where the registration request message includes a first globally unique temporary user identifier, where the first globally unique temporary user identifier is allocated by the first access management node for the terminal device.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver module is further configured to receive a registration accept message from the second access management node, and send the registration accept message to the terminal device, where the registration accept message includes a second globally unique temporary user identifier, where the second globally unique temporary user identifier is allocated by the second access management node to the terminal device, and where the second globally unique temporary user identifier is different from the first globally unique temporary user identifier.

In a fifth aspect, a communication apparatus is provided, the apparatus comprising a processor and a memory, the memory for storing a computer program, the processor for executing the computer program stored in the memory to cause the communication apparatus to perform the communication method of the first aspect and any of the first to third possible implementations of the first aspect or to perform the communication method of the second aspect and any of the first to third possible implementations of the second aspect.

In a sixth aspect, a computer readable storage medium is provided, on which a computer program is stored which, when run on a computer, causes the computer to perform the communication method as in any one of the first to third possible implementations of the first aspect and the first aspect, or to perform the communication method as in any one of the first to third possible implementations of the second aspect and the second aspect.

In a seventh aspect, a chip system is provided, the chip system comprising a processor for calling and running a computer program from a memory, such that a communication device in which the chip system is installed performs the communication method as in any of the first to third possible implementations of the first aspect and the first aspect, or performs the communication method as in any of the first to third possible implementations of the second aspect and the second aspect.

According to the scheme of the embodiment of the application, when the length of the temporary mobile user identifier is larger than that of the random access identifier, the terminal equipment generates the random access identifier meeting the length requirement, so that the terminal equipment can successfully access the wireless network in the random access process. Moreover, after the temporary mobile subscriber identity is extended to 64 bits or longer, the network device can allocate non-conflicting globally unique temporary subscriber identities to more subscribers, and can ensure enough randomized field space in the globally unique temporary subscriber identities, so that the security is higher.

Drawings

Fig. 1 is a schematic diagram of a logic architecture of a mobile communication network.

Fig. 2 shows a schematic block diagram of GUTI in a 4G network.

FIG. 3 shows a schematic block diagram of a 5G-GUTI in a 5G network.

Fig. 4 shows a schematic interaction diagram of a contention-based random access procedure.

Fig. 5 is a schematic interaction diagram of an example of the random access method of the present application.

Fig. 6 is another exemplary interaction diagram of the method of random access of the present application.

Fig. 7 is a schematic block diagram of an example of the terminal device of the present application.

Fig. 8 is a schematic block diagram of an example of an access node of the present application.

Fig. 9 is a schematic block diagram of an example of the communication apparatus of the present application.

Fig. 10 is a schematic block diagram of still another example of the communication apparatus of the present application.

Detailed Description

The technical scheme of the application will be described below with reference to the accompanying drawings.

As used in this application, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between 2 or more computers. Furthermore, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with one another in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

The technical scheme of the embodiment of the application can be applied to various communication systems, such as a global system for mobile communication (global system of mobile communication, GSM) system, a code division multiple access (code division multiple access, CDMA) system, a wideband code division multiple access (wideband code division multiple access, WCDMA) system, a general packet radio service (GENERAL PACKET radio service, GPRS), a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD), a universal mobile communication system (universal mobile telecommunication system, UMTS), a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation system or a New Radio (NR), a future communication system and the like.

With the development of communication technology, mobile communication systems will support not only traditional communications, but also, for example, device-to-device (D2D) communications, machine-to-machine (machine to machine, M2M) communications, machine type communications (MACHINE TYPE communications, MTC), internet of vehicles (vehicle to everything, V2X) communications, for example, vehicle-to-vehicle (vehicle to vehicle, V2V) communications, vehicle-to-infrastructure (vehicle to infrastructure, V2I) communications, vehicle-to-pedestrian (vehicle to pedestrian, V2P) communications, vehicle-to-network (vehicle to network, V2N) communications.

Fig. 1 is a schematic diagram of a logic architecture of a mobile communication network, and each network element that may be involved in the logic architecture of the network is described below.

1. The terminal devices may include various handheld devices, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of terminals, mobile Stations (MSs), terminals, user Equipment (UEs), soft terminals, etc. Such as water meters, electricity meters, sensors, etc.

2. The access node is used for providing network access function for authorized terminal equipment in a specific area and can use transmission tunnels with different qualities according to the level of the terminal equipment, the service requirement and the like.

The access node may be a (radio) access network (radio access network, (R) AN) network element for managing radio resources, providing access services for the terminal device, and further completing forwarding of control signals and terminal device data between the terminal device and the core network, where the (R) AN network element may also be understood as a base station in a conventional network.

The "network element" may also be referred to as an entity, a device, an apparatus, a module, or the like, and the present application is not particularly limited. Also, in the present application, for convenience of understanding and explanation, a description of "network element" is omitted in part of the description, for example, AN (R) AN network element is abbreviated as (R) AN, in which case the "(R) AN network element" is understood as AN (R) AN network element or AN (R) AN entity, and explanation of the same or similar case is omitted hereinafter.

The access nodes may also include a centralized unit (centralized unit, CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node (CU-CP node) and a user plane CU node (CU-UP node), and a DU node.

3. The access management node is mainly used for mobility management, access management and the like. In particular, it may be used to implement functions other than session management in Mobility Management Entity (MME) functions, such as lawful interception and access authorization/authentication.

In a 5G communication system, the access management network element may be an access and mobility management function (ACCESS AND mobility management function, AMF) network element. In future communication systems, the access management network element may still be an AMF network element, or may have other names, which is not limited by the present application.

4. And the data management function network element is used for processing the terminal equipment identification, access authentication, registration, mobility management and the like.

In a 5G communication system, the data management network element may be a unified data management (unified DATA MANAGEMENT, UDM) network element. In future communication systems, the unified data management may still be a UDM network element, or may have other names, which is not limited by the present application.

Before describing the embodiments of the present application, several identifier names related to the embodiments of the present application, which may be corresponding identifiers in the 4G or 5G system mentioned in the present application, are first briefly described. It should be noted that in the following communication system, these identifiers may follow existing identifier names, or may be other identifier names, which is not limited by the present application.

1. Globally unique temporary user identification

In a wireless network, a permanent identification of a terminal device may be used to uniquely identify the terminal device, such as an international mobile subscriber identity (international mobile subscriber identity, IMSI). However, there is a security risk that the wireless network directly communicates the permanent identity, for which purpose the network device may assign a globally unique temporary user identity to the terminal device. The globally unique temporary user identity is used for temporarily and uniquely identifying the terminal device.

To further increase security, the network device also updates the globally unique temporary user identity of the terminal device frequently. For example, the globally unique temporary user identification may be a globally unique temporary user identification (globally unique temporary UE identity, GUTI) in the fourth generation (4th generation,4G) system, or a 5G globally unique temporary user identification (globally unique temporary UE identity, 5G-GUTI) in the fifth generation (5th generation,5G) system. Fig. 2 is a schematic diagram of a globally unique temporary user identification in a 4G system, and fig. 3 is a schematic diagram of a globally unique temporary user identification in a 5G system.

2. Temporary mobile subscriber identity

In order to enable the network device to quickly find the locally stored context of the terminal device according to the globally unique temporary user identity, the temporary mobile user identity of the terminal device is used as part of the fields in the globally unique temporary user identity when the globally unique temporary user identity is allocated to the terminal device.

Furthermore, a randomization field is reserved in the temporary mobile subscriber identity so that the globally unique temporary subscriber identity of the terminal device can be changed frequently.

In particular, the temporary mobile subscriber identity may be an M-TMSI (MME-temporary mobile subscriber identity) in a 4G system, or a 5G-TMSI (5G-temporary mobile subscriber identity) in a 5G system. The temporary mobile subscriber identity may be, for example, the M-TMSI in fig. 2 or the 5G-TMSI in fig. 3.

The network device may be an AMF in a 5G system, or may be an MME in a 4G system, or may be other network side devices storing a context of the terminal device, which is not limited.

3. Serving temporary mobile subscriber identity

In order to enable other devices within the wireless network to address the above-mentioned network device serving the terminal device, the network device, when assigned a globally unique temporary user identity, will have the network device identity for identifying the network device as some field in the globally unique temporary user identity. The service temporary mobile subscriber identity consists of the temporary mobile subscriber identity and the network equipment identity. The serving temporary mobile subscriber identity may be an S-TMSI (serving-temporary mobile subscriber identity) in a 4G system or a 5G-S-TMSI (5G-S serving-temporary mobile subscriber identity) in a 5G system. The serving temporary mobile subscriber identity may be the S-TMSI in fig. 2 or the 5G-S-TMSI in fig. 3.

In other words, other devices in the wireless network may address to the network device serving the terminal device according to the network identifier in the temporary mobile subscriber identifier, and then find the context of the terminal device in the network device according to the temporary mobile subscriber identifier in the temporary mobile subscriber identifier.

4. Random access identification

The random access identity is used to identify the terminal device during the random access procedure. Specifically, the terminal device sends a random access identifier to the network device, after the network device determines that the terminal device is allowed to access the wireless network, the terminal device sends the random access identifier to the terminal device, and the terminal device acquires that the random access is successful according to the consistency of the received random access identifier and the self-sending. The random access identifier may be a radio access user identifier shown in fig. 2 and has a length of 40 bits including an M-TMSI and an MME Code in the existing 4G network, and in the 5G network, the random access identifier is consistent with the composition structure of the radio access user identifier in fig. 3 and has a length of 39 bits including a 5G-TMSI and some fields related to AMF identifiers.

The random access procedure is described below.

The random access procedure refers to a procedure from when a user transmits a random access preamble sequence to when an attempt is made to access a network to establish a basic signaling connection with the network, and is one of the most basic requirements for any cellular communication system, for enabling a terminal to establish data communication with a network side. The random access procedure is divided into a contention-based random access procedure and a non-contention-based random access procedure, and fig. 4 shows 4 steps of the contention-based random access procedure, including:

s401, terminal equipment sends a random access preamble sequence (preamble) to an access node;

s402, the access node broadcasts a random access response, and the terminal equipment obtains information sent by the access node by reading a system broadcast message;

s403, the terminal equipment sends an initial uplink transmission message to the access node.

And after receiving the random access response, the terminal transmits a message on the allocated uplink resource. There may be a plurality of terminal devices reading the system broadcast message of the access node, selecting the same resource for simultaneous access, so in the message of this step, the terminal device carries the identifier of the terminal device, i.e. the existing wireless access user identifier. For example, a 40 bit long S-TMSI as shown in fig. 2, or a 39 bit long radio access user identity as shown in fig. 3. As can be seen, the composition structure of the radio access subscriber identity includes a temporary mobile subscriber identity.

S404, the access node sends a competition resolving message to the terminal equipment.

Illustratively, if the terminal device wins in the conflict resolution, the access node returns the wireless access user identity of the winning terminal device to the terminal device. And the terminal equipment acquires success of self-access according to the consistency of the received wireless access user identification and self-transmission. Subsequently, the terminal device may send a registration request message to the network side for network registration.

It should be noted that the radio access ue is limited in length, for example, not more than 40 bits in the 4G system and not more than 39 bits in the 5G system. The above-mentioned composition structure of radio access user identification includes temporary mobile user identification.

Currently, the length of the temporary mobile subscriber identity is 32 bits, and the network device may extend the length of the temporary mobile subscriber identity to 64 bits or more in order to support millions or even tens of millions of subscribers and to ensure that the assigned temporary identities do not collide. After the temporary mobile subscriber identity is extended, if the existing composition structure of the radio access subscriber identity is still adopted, the length of the radio access subscriber identity exceeds the length limit, which results in access failure of the terminal device.

For example, when the length of the temporary mobile subscriber identity after expansion is greater than or equal to 64 bits, in step 3 in the random access procedure, if the wireless access subscriber identity still extends the existing composition structure, its length may exceed the length limit of the "initial uplink transmission message" sent by the terminal device, resulting in random access failure.

Fig. 5 shows a schematic interaction diagram of an example of the method 500 of random access of the present application, which method 500 is performed by a terminal device and an access node, as described below.

S501, the terminal device generates a random access identifier.

Wherein the random access identifier is used for identifying the terminal device in the random access process.

Optionally, the length of the random access identifier meets a length requirement, that is, is less than or equal to a first preset length, so as to meet the normal transmission of the first request message between the terminal device and the access node. For example, the first preset length is a restriction length of the radio access subscriber identity, i.e. the length of the random access identity may be smaller than or equal to the restriction length of the radio access subscriber identity, such as 40 bits in a 4G system and 39 bits in a 5G system. That is, the "random access identifier" herein has a length requirement of 40 bits in the existing 4G communication system, a length requirement of 39 bits in the existing 5G communication system, and a length requirement in the subsequent communication system may or may not be consistent with that in the existing system.

Optionally, in the extended temporary mobile subscriber identity scenario, the length of the random access identity is assumed to be greater than or equal to 64 bits, and the length of the extended temporary mobile subscriber identity is less than the length of the extended temporary mobile subscriber identity.

As an example, this step is between the second and third mutual information in the random access procedure, i.e. between the terminal device receiving a random access response message from the access node (corresponding to S402 in fig. 4) and the terminal device sending an initial uplink transmission message to the access node (corresponding to S403 in fig. 4).

In the application, the terminal equipment generates the random access identifier which meets the message length requirement and can identify the terminal equipment. The "terminal device capable of identifying" does not necessarily require that the component structure of the random access identifier includes a field of the temporary mobile subscriber identifier, for example, the terminal device may generate the random access identifier meeting the length requirement based on the temporary mobile subscriber identifier, or may use the generated random number meeting the length requirement as the random access identifier, which is described in detail below.

In one mode, the terminal device generates a random access identifier according to the temporary mobile subscriber identifier.

In an alternative implementation, the terminal device generates the random access identity based on the temporary mobile subscriber identity and a specific algorithm. For example, in a 4G network, the M-TMSI in FIG. 2 may be used to generate a random access identifier by a specific algorithm, and in a 5G network, the 5G-TMSI in FIG. 3 may be used to generate a random access identifier by a specific algorithm.

In another alternative implementation, the random access identity is generated based on the identity of the first access management node, the temporary mobile subscriber identity and a specific algorithm. For example, in a 4G network, the M-TMSI and MME Code in fig. 2, i.e., S-TMSI, may be generated by a specific algorithm to generate a random access identifier, or the M-TMSI, MME Code and MME Group ID may be together generated by a specific algorithm to generate a random access identifier. In a 5G network, the 5G-TMSI and the AMF Pointer may be generated by a specific algorithm to generate a random access identifier, or the 5G-TMSI, the AMF Pointer and the AMF Set ID, i.e., the 5G-S-TMSI, may be generated by a specific algorithm to generate a random access identifier, or the 5G-S-TMSI and the AMF Region ID may be generated by a specific algorithm to generate a random access identifier.

In another alternative implementation, the terminal device generates the random access identity according to a partial field of the identity of the first access management node, the temporary mobile subscriber identity and a specific algorithm. For example, the random access user identity in fig. 3 may be generated by a specific algorithm, or 1 bit in the AMF Set ID may be generated by a specific algorithm together with the AMF Pointer, 5G-TMSI.

And in a second mode, the terminal equipment generates a random access identifier according to the first globally unique temporary user identifier and a specific algorithm.

As one example, an entire GUTI in a 4G network may be algorithmically generated to 40 bits of random access identification, or an entire 5G-GUTI in a 5G network may be algorithmically generated to 39 bits of random access identification.

It should be noted that the above-mentioned "specific algorithm" may be a hash digest algorithm, without limitation.

In the third mode, the terminal device generates a random number as the random access identifier.

The length of the random number meets the length requirement, namely, is smaller than or equal to the first preset length.

S502, the terminal equipment sends a first request message to the access node, wherein the first request message comprises the random access identifier.

The first request message may be used to request access to the wireless network in a random access process, and may specifically be a random access request message or an uplink initial transmission message, without limitation.

The terminal device sends a radio resource control RRC connection establishment request message to the access node, the message comprising a first request message, and the first request message comprising the random access identity generated by the terminal device in step S501.

S503, the access node sends a first response message to the terminal equipment, wherein the first response message comprises a random access identifier.

It should be understood that the access node may send, to the terminal device, a random access identifier of the terminal device that wins the contention of the random access in the first response message, and if the received random access identifier is the random access identifier of the terminal device, the terminal device learns that the access of the terminal device is successful.

The access node may send an RRC connection setup response message to the terminal device, where the RRC connection setup response message includes the first response message.

The first response message is used for responding to the first request message, and may specifically be a contention resolution message in a random access process, without limitation.

Based on the method provided by the embodiment, the terminal equipment can generate the random access identifier meeting the length requirement, and the random access identifier is used for identifying the terminal equipment in the random access process, so that the terminal equipment can normally access the wireless network in the random access process. The method can avoid access failure caused by adopting the existing wireless mobile user identifier to perform random access after the temporary mobile user identifier is expanded to 64 bits or longer.

Optionally, in an implementation scenario of the above embodiment, after step S503, the method further includes the terminal device sending a radio resource control RRC connection setup complete message to the access node, where the RRC connection setup complete message includes a serving temporary mobile user identity, and the serving temporary mobile user identity includes the temporary mobile user identity and an identity of the first access management node.

It should be understood that after the random access is successful, i.e. after the RRC connection establishment is completed, the terminal device sends an RRC connection establishment complete message to the access node, where the message carries the serving temporary mobile subscriber identity.

Wherein the serving temporary mobile subscriber identity may be used to identify a context of the terminal device in the first access management node.

Optionally, in the scenario of expanding the temporary mobile subscriber identity, the serving temporary mobile subscriber identity includes an expanded temporary mobile subscriber identity. Since the RRC connection setup complete message has no message length limitation, the message may directly carry the service temporary mobile subscriber identity. For example, in a 4G communication system, the terminal device sends an S-TMSI to the access node, wherein the length of the included M-TMSI is greater than or equal to 64 bits, or in a 5G communication system, the terminal device sends a 5G-S-TMSI to the access node, wherein the length of the included 5G-TMSI is greater than or equal to 64 bits.

In addition, the RRC connection setup complete message further includes a non-access stratum (NAS) message, where the NAS message is a registration request message.

Wherein the registration request message includes a first globally unique temporary user identification assigned by the first access management node. For example, in a 4G communication system, the terminal device sends a first GUTI to the access node, or in a 5G communication system, the terminal device sends a first 5G-GUTI to the access node.

Further, after receiving the RRC connection setup complete message, the access node may also verify the identity of the terminal device. Specifically, the access node may generate a first identifier according to the service temporary mobile subscriber identifier, and if the first identifier is the same as the random access identifier, the authentication of the terminal device is successful.

In an alternative implementation, the access node generates the first identity based on the temporary mobile subscriber identity and a specific algorithm. For example, if the terminal device generates a random access identity according to the temporary mobile subscriber identity and a specific algorithm in step S501, the access node may generate the first identity according to the temporary mobile subscriber identity in the composition structure of the serving temporary mobile subscriber identity in the RRC connection setup complete message and the specific algorithm.

In another alternative implementation, the access node generates the first identity based on the identity of the first access management node, the temporary mobile subscriber identity and a specific algorithm. For example, if the terminal device generates a random access identity according to the temporary mobile subscriber identity, the identity of the first access management node and a specific algorithm in step S501, the access node may generate the first identity according to the temporary mobile subscriber identity and the identity of the first access management node in the composition structure of the serving temporary mobile subscriber identity in the RRC connection setup complete message, and the specific algorithm.

The specific algorithm may be a hash digest algorithm, which is not limited.

In particular, if in S501 the terminal device uses a way of generating a random number or if there is a field in the identity before generating a random access identity by a specific algorithm that is not included in the serving temporary mobile subscriber identity, the access node is not able to verify the identity of the terminal device.

If the first identifier is consistent with the random access identifier received by the access node in step S502, the terminal device is allowed to trigger a registration procedure, that is, a second access management node is selected for the terminal device, and then a service temporary mobile user identifier is sent to the second access management node.

Based on the scheme of the embodiment, the access node verifies the identity of the terminal equipment after the random access process, and the accuracy and the safety of the random access process are further improved.

The access node then forwards a registration request message to the second access management node, the registration request message including the first global temporary user identity. The first global temporary user identity is assigned by a first access management node, which may be the same as or different from the second access management node. Further, the second access management node allocates a global temporary user identifier to the terminal device after receiving the registration request of the terminal device. The second access management node carries the second global temporary user identification in a registration acceptance message and sends the second global temporary user identification to the terminal equipment.

It should be noted that, whether the second access management node or the first access management node is allocated to the terminal device with the second global temporary user identifier, the second global temporary user identifier and the first global temporary user identifier are different.

According to the scheme of the embodiment of the application, the terminal equipment generates the random access identifier meeting the length requirement, so that the terminal equipment can normally access the wireless network in the random access process. Moreover, after the temporary mobile subscriber identity is extended to 64 bits or longer, the network device can allocate non-conflicting globally unique temporary subscriber identities to more subscribers, and can ensure enough randomized field space in the globally unique temporary subscriber identities, so that the security is higher.

Fig. 6 shows a schematic interaction diagram of a method 600 of random access according to an embodiment of the application.

S601, a terminal device sends a random access preamble sequence to an access node.

The terminal device, upon accessing the wireless network, triggers a random access procedure by which the access node is requested to allocate uplink resources and uplink synchronization is established with the access node. The terminal device may randomly select one of the preamble sequences as a random access preamble sequence and transmit it to the access node on a random access channel.

S602, the access node broadcasts a random access response, and the terminal equipment receives the random access response.

The random access response may be transmitted by a system broadcast message, for example, after the access node detects the random preamble sequence transmitted by the terminal device.

The random access response may include the random access preamble sequence received in S601, information of uplink resources allocated to the terminal device, and the like.

S603, the terminal equipment generates a random access identifier according to the temporary mobile user identifier.

The method for generating the random access identifier by the terminal device according to the temporary mobile subscriber identifier may be specifically referred to as a first mode in the embodiment shown in fig. 5. For example, a random access identity conforming to the length is generated from the temporary mobile subscriber identity and a specific algorithm.

Alternatively, in a 4G network, the terminal device generates a 40-bit length random access identity by a specific algorithm with an M-TMSI of 64 bits or longer. Or in the 5G network, the terminal equipment generates a random access identifier with the length of 39 bits by a specific algorithm through a 5G-TMSI with the length of 64 bits or more.

The specific algorithm may be a hash digest algorithm, or other algorithms capable of implementing similar functions, which is not limited in this embodiment.

S604, the terminal equipment sends a first request message to the access node on the allocated uplink resource.

Wherein the first request message includes the random access identification in S603.

It should be understood that after step S602, there may be a plurality of terminal devices reading the system broadcast message of the access node, selecting the same resource for simultaneous access. Therefore, in this step, the terminal device sends the RRC connection establishment request message on the allocated uplink resource, where the message includes the random access identifier, so that after the terminal device receives the contention resolution message including the same random access identifier in the next step, it can determine that the random access of the terminal device is successful.

S605, the access node sends a first response message to the terminal device, the first response message including the random access identifier.

The access node sends a first response message to the terminal device, illustratively after determining that the terminal device is allowed to access the wireless network.

S606, the terminal device sends an RRC connection setup complete message to the access node, wherein the RRC connection setup complete message comprises the service temporary mobile user identifier.

The service temporary mobile subscriber identity may refer to the related description in the embodiment shown in fig. 5, and will not be described herein.

The terminal device determines that the self-access is successful according to the random access identifier included in the received contention resolution message, and then triggers the registration procedure.

The terminal device sends an RRC connection setup complete message to the access node, where the RRC connection setup complete message includes a serving temporary mobile subscriber identity, where the serving temporary mobile subscriber identity includes a temporary mobile subscriber identity with a length of 64 bits or more.

Meanwhile, the RRC connection setup complete message may further include a registration request message sent through the NAS layer, where the message includes a globally unique temporary user identifier, and a composition structure of the globally unique temporary user identifier includes the temporary mobile user identifier with a length greater than or equal to 64 bits.

S607, the access node generates a first identity.

The access node generates a random access identifier according to the terminal device through the temporary mobile subscriber identifier and a specific algorithm in step S603, and then after receiving the RRC connection setup complete message, the access node generates a first identifier according to the temporary mobile subscriber identifier included in the received service temporary mobile subscriber identifier and the same specific algorithm in step S603. If the first identifier is consistent with the random access identifier in the initial uplink transmission message received by the access node, the identity of the terminal equipment is verified, and the access node allows the terminal equipment to trigger a registration flow.

For example, in a 4G network, the access node generates a first identity according to the M-TMSI and a specific algorithm, or in a 5G network, the access node generates a first identity according to the 5G-TMSI and a specific algorithm.

And S608, the access node selects a second access management node for the terminal equipment according to the service temporary mobile user identification.

S609, the access node sends a registration request message to the second access management node, where the registration request message includes the first globally unique temporary user identifier.

The second access management node determines a first access management node of the previous service terminal device according to the received globally unique temporary user identifier, wherein the first access management node and the second access management node may be the same or different. The second access management node obtains a user context of the terminal device.

Specifically, when the first access management node is the same as the second access management node, the second access management node obtains the locally stored user context of the terminal device according to the temporary mobile user identifier contained in the globally unique temporary user identifier. When the first access management node is different from the second access management node, the second access management node sends the received global unique temporary user identifier to the first access management node, and the first access management node acquires the locally stored user context of the terminal equipment according to the temporary mobile user identifier contained in the global unique temporary user identifier and sends the user context to the second access management node.

S610 to S613, the second access management node registers with the data management function, sends an access management node registration request message to the data management function, receives an access management node registration response message sent by the data management function, sends a subscription data acquisition request to the data management function, and receives a subscription data acquisition response sent by the data management function, thereby acquiring subscription data of the terminal device.

S614, the second access management node sends a registration accept message to the terminal device, wherein the registration accept message comprises the second globally unique temporary user identification.

Wherein the second globally unique temporary user identity is a globally unique temporary user identity assigned by the second access management node for the terminal device.

Specifically, after the registration is completed, the second access management node may allocate a second globally unique temporary user identifier to the terminal device, that is, send a registration accept message to the terminal device, where the message includes the second globally unique temporary user identifier. The access management node sends a registration acceptance message to the access node through the NAS layer, and the access node forwards the registration acceptance message to the terminal equipment.

S615, the terminal equipment sends a registration completion message to the second access management node.

According to the scheme of the embodiment of the application, after the length of the temporary mobile user identifier is expanded, the terminal equipment generates the random access identifier meeting the length requirement, so that the terminal equipment can normally access the wireless network in the random access process. Moreover, after the temporary mobile subscriber identity is extended to 64 bits or longer, the network device can allocate non-conflicting globally unique temporary subscriber identities to more subscribers, and can ensure enough randomized field space in the globally unique temporary subscriber identities, so that the security is higher. Further, the access node verifies the identity of the terminal equipment after the random access process, and the accuracy and the safety of the random access process are further improved.

The method provided by the embodiment of the application is described in detail above with reference to fig. 5 to 6. The following describes in detail the communication device provided in the embodiment of the present application with reference to fig. 7 to 10.

Fig. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown, the communication device 10 may include a transceiver module 11 and a processing module 12.

In one possible design, the communication device 10 may correspond to the terminal equipment in the above method embodiments. For example, it may be a user equipment or a chip configured in the user equipment.

In particular, the communication apparatus 10 may correspond to the method 500 and the terminal device in the method 500 according to an embodiment of the present application, and the communication apparatus 10 may comprise means for performing the method 500 in fig. 5 or the method 600 in fig. 6. And, each unit in the communication device 10 and the other operations and/or functions described above are respectively for implementing the corresponding flow of the method 500 in fig. 5 or the method 600 in fig. 6.

When the communication device 10 is used to perform the method 500 in fig. 5, the transceiver module 11 may be used to perform steps S502 and S503 in the method 500, and the processing module 12 may be used to perform step S501 in the method 500.

When the communication device 10 is used to perform the method 600 in fig. 6, the transceiver module 11 may be used to perform steps S601, S602, S604, S605, S606, S614, S615 in the method 600, and the processing module 12 may be used to perform step S603 in the method 600.

Specifically, the processing module 12 is configured to generate a random access identifier, where the random access identifier is used to identify the terminal device during random access, the transceiver module 11 is configured to send a first request message to an access node, where the first request message includes the random access identifier, and the first request message is used to request access to a wireless network during random access, and is further configured to receive a first response message from the access node, where the first response message includes the random access identifier, and the length of the random access identifier is smaller than the length of a temporary mobile user identifier of the terminal device, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

Optionally, the transceiver module 11 is further configured to send a radio resource control RRC connection setup complete message to the access node, where the RRC connection setup complete message includes a serving temporary mobile subscriber identity, and the serving temporary mobile subscriber identity includes the temporary mobile subscriber identity and an identity of the first access management node.

Optionally, the processing module 12 is specifically configured to generate the random access identifier according to the temporary mobile subscriber identifier, or generate the random access identifier according to a first globally unique temporary subscriber identifier through a specific algorithm, where the temporary mobile subscriber identifier is included in a component structure of the first globally unique temporary subscriber identifier, or generate a random number as the random access identifier.

The processing module 12 is specifically further configured to generate the random access identifier according to the temporary mobile subscriber identifier and a specific algorithm, or generate the random access identifier according to the identifier of the first access management node and the temporary mobile subscriber identifier and the specific algorithm.

The transceiver module 11 is further configured to send a registration request message to the access node, where the registration request message includes a first globally unique temporary user identity, where the first globally unique temporary user identity is assigned by the first access management node. The transceiver module 11 receives a registration accept message from the access node, where the registration accept message includes a second globally unique temporary user identity assigned by the first access management node or a second access management node, where the second globally unique temporary user identity is different from the first globally unique temporary user identity, and the first access management node is different from the second access management node.

Fig. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown, the communication device 20 may include a transceiver module 21 and a processing module 22.

In one possible design, the communication device 20 may correspond to an access node in the above method embodiments. For example, the chip may be a RAN or a chip disposed in the RAN.

In particular, the communication apparatus 20 may correspond to the network device in the method 500 and the method 600 according to an embodiment of the present application, and the communication apparatus 20 may include a module for performing the method 500 in fig. 5 or the method 600 in fig. 6. And, each unit in the communication device 20 and the other operations and/or functions described above are respectively for implementing the corresponding flow of the method 500 in fig. 5 or the method 600 in fig. 6.

When the communication device 20 is used to perform the method 500 in fig. 5, the transceiver module 21 may be used to perform steps S502, S503 in the method 500.

When the communication device 20 is used to perform the method 600 in fig. 6, the transceiver module 21 may be used to perform steps S601, S602, S604, S605, S606, S609, S614, S615 in the method 600, and the processing module 22 may be used to perform steps S607 and S608 in the method 600.

Specifically, the transceiver module 21 is configured to receive a first request message from a terminal device, where the first request message is used to request to access to a wireless network in a random access process, the first request message includes a random access identifier, the random access identifier is used to identify the terminal device in the random access process, and send a first response message to the terminal device, where the first response message includes the random access identifier, and a length of the random access identifier is smaller than a length of a temporary mobile user identifier of the terminal device, and a length of the temporary mobile user identifier is greater than or equal to 64 bits.

Optionally, the transceiver module 21 is further configured to receive a radio resource control RRC connection setup complete message from the terminal device, where the RRC connection setup complete message includes a serving temporary mobile subscriber identity, and the serving temporary mobile subscriber identity includes the temporary mobile subscriber identity and an identity of the first access management node. A processing module 22 is configured to select a second access management node for the terminal device according to the serving temporary mobile subscriber identity.

Specifically, the processing module 22 is further configured to generate a first identifier according to the serving temporary mobile subscriber identifier, and when the first identifier is the same as the random access identifier, the access node selects a second access management node for the terminal device. Optionally, the processing module 22 is further specifically configured to generate the first identifier according to the temporary mobile subscriber identifier and a specific algorithm, or generate the first identifier according to the identifier of the first access management node, the temporary mobile subscriber identifier and the specific algorithm.

In addition, the transceiver module 21 is further configured to receive a registration request message from the terminal device;

the transceiver module 21 is further configured to send the registration request message to the second access management node, where the registration request message includes a first globally unique temporary user identity, where the first globally unique temporary user identity is allocated by the first access management node for the terminal device. The transceiver module 21 is further configured to receive a registration accept message from the second access management node, and send the registration accept message to the terminal device, where the registration accept message includes a second globally unique temporary user identifier, where the second globally unique temporary user identifier is allocated to the terminal device by the second access management node, and the second globally unique temporary user identifier is different from the first globally unique temporary user identifier.

Fig. 9 is a schematic diagram of a communication apparatus 30 according to an embodiment of the present application, where as shown in fig. 9, the apparatus 30 may be a terminal device, including various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, and various types of terminals, mobile stations, terminals, user equipment, soft terminals, and so on, or may be a chip or a chip system located on the terminal device.

The apparatus 30 may include a processor 31 (i.e., an example of a processing module) and a memory 32. The memory 32 is configured to store instructions, and the processor 31 is configured to execute the instructions stored in the memory 32, to cause the apparatus 30 to implement steps performed by a terminal device in a corresponding method as shown in fig. 5 or 6.

Further, the device 30 may also include an input port 33 (i.e., one example of a transceiver module) and an output port 34 (i.e., another example of a transceiver module). Further, the processor 31, memory 32, input port 33 and output port 34 may communicate with each other via internal communication paths to communicate control and/or data signals. The memory 32 is used for storing a computer program, and the processor 31 may be used for calling and running the computer program from the memory 32 to control the input port 33 to receive signals and the output port 34 to send signals, so as to complete the steps of the terminal device in the method. The memory 32 may be integrated in the processor 31 or may be provided separately from the processor 31.

Alternatively, if the communication device 30 is a communication apparatus, the input port 33 is a receiver, and the output port 34 is a transmitter. Wherein the receiver and the transmitter may be the same or different physical entities. Which are the same physical entities, may be collectively referred to as transceivers.

Alternatively, if the communication device 30 is a chip or a circuit, the input port 33 is an input interface, and the output port 34 is an output interface.

As an implementation, the functions of the input port 33 and the output port 34 may be considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. The processor 31 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, a manner of using a general-purpose computer may be considered to implement the communication device provided by the embodiment of the present application. I.e. program code that implements the functions of the processor 31, the input port 33 and the output port 34 is stored in the memory 32, and the general purpose processor implements the functions of the processor 31, the input port 33 and the output port 34 by executing the code in the memory 32.

The modules or units in the communication apparatus 30 may be configured to perform the actions or processes performed by the device (e.g., the terminal device) performing random access in the above method, and detailed descriptions thereof are omitted herein for avoiding redundancy.

The concepts related to the technical solutions provided by the embodiments of the present application, explanation and detailed description of the concepts related to the embodiments of the present application and other steps are referred to in the foregoing methods or descriptions related to the other embodiments, and are not repeated herein.

Fig. 10 is a schematic diagram of a communication apparatus 40 according to an embodiment of the present application, where as shown in fig. 10, the apparatus 40 may be an access node, including a network element, such as a RAN, having an access function for providing access to terminal devices.

The apparatus 40 may include a processor 41 (i.e., an example of a processing module) and a memory 42. The memory 42 is configured to store instructions, and the processor 41 is configured to execute the instructions stored in the memory 42, to cause the apparatus 40 to implement steps performed by an access node in a corresponding method as shown in fig. 5 or 6.

Further, the device 40 may also include an input port 43 (i.e., one example of a transceiver module) and an output port 44 (i.e., another example of a transceiver module). Further, the processor 41, memory 42, input port 43 and output port 44 may communicate with each other via internal communication paths to communicate control and/or data signals. The memory 42 is used for storing a computer program, and the processor 41 may be used for calling and running the computer program from the memory 42 to control the input port 43 to receive signals and the output port 44 to send signals, so as to complete the steps of the terminal device in the method. The memory 42 may be integrated in the processor 41 or may be provided separately from the processor 41.

Alternatively, if the communication device 40 is a communication apparatus, the input port 43 is a receiver, and the output port 44 is a transmitter. Wherein the receiver and the transmitter may be the same or different physical entities. Which are the same physical entities, may be collectively referred to as transceivers.

Alternatively, if the communication device 40 is a chip or a circuit, the input port 43 is an input interface, and the output port 44 is an output interface.

As an implementation, the functions of the input port 43 and the output port 44 may be considered to be implemented by a transceiving circuit or a dedicated chip for transceiving. The processor 41 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.

As another implementation manner, a manner of using a general-purpose computer may be considered to implement the communication device provided by the embodiment of the present application. I.e. program code that implements the functions of the processor 41, the input 43 and the output 44 is stored in the memory 42, and the general purpose processor implements the functions of the processor 41, the input 43 and the output 44 by executing the code in the memory 42.

The modules or units in the communication apparatus 40 may be configured to perform the actions or processes performed by the device (i.e., the access node) that accepts random access in the above method, and detailed descriptions thereof are omitted herein for avoiding redundancy.

It should be appreciated that in embodiments of the present application, the processor may be a central processing unit (CPU, central processing unit), but may also be other general purpose processors, digital signal processors (DSP, DIGITAL SIGNAL processor), application SPECIFIC INTEGRATED Circuits (ASIC), off-the-shelf programmable gate arrays (field programmable GATE ARRAY, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate Synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced Synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM).

The embodiment of the application also provides a computer readable storage medium, on which computer instructions for implementing the method executed by the terminal device or the method executed by the network device in the above method embodiment are stored.

For example, the computer program when executed by a computer, makes the computer implement the method executed by the terminal device or the method executed by the network device in the above-described method embodiment.

The embodiment of the application also provides a computer program product containing instructions, which when executed by a computer, cause the computer to implement the method executed by the terminal device or the method executed by the network device in the above method embodiment.

The embodiment of the application also provides a communication system, which comprises the network equipment and the terminal equipment in the embodiment, wherein the network equipment is used for receiving the first request message and sending the first response message, the terminal equipment is used for generating the random access identifier, sending the first request message and receiving the first response message, the first request message and the first response message both comprise the random access identifier, the length of the random access identifier is greater than that of the temporary mobile user identifier of the terminal equipment, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. 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 includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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 site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). 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, data center, etc. that contains one or more sets 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.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B, and that three cases, a alone, a and B together, and B alone, may exist. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein. In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. The storage medium includes various media capable of storing program codes such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A random access method, comprising:

The terminal device generates a random access identifier, where the random access identifier is used to identify the terminal device during a random access process;

The terminal device sends a first request message to the access node, where the first request message includes the random access identifier, and the first request message is used to request access to the wireless network during the random access process;

The terminal device receives a first response message from the access node, where the first response message includes the random access identifier;

The length of the random access identifier is smaller than the length of the temporary mobile user identifier of the terminal device, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

2. The method according to claim 1, characterized in that the method further comprises:

The terminal device sends a radio resource control RRC connection establishment completion message to the access node;

The RRC connection establishment completion message includes the service temporary mobile user identity of the terminal device, and the service temporary mobile user identity includes the temporary mobile user identity and the identity of the first access management node.

3. The method according to claim 1, wherein the terminal device generates the random access identifier, comprising:

The terminal device generates the random access identifier according to the temporary mobile user identifier; or,

The terminal device generates the random access identifier by a specific algorithm according to the first globally unique temporary user identifier, wherein the composition structure of the first globally unique temporary user identifier includes the temporary mobile user identifier; or

The terminal device generates a random number as the random access identifier.

4. The method according to claim 3, wherein the terminal device generates the random access identifier according to the temporary mobile user identifier, comprising:

generating the random access identifier according to the temporary mobile user identifier and a specific algorithm; or,

The random access identifier is generated according to the identifier of the first access management node, the temporary mobile user identifier and a specific algorithm.

5. The method according to any one of claims 2 to 4, characterized in that the method further comprises:

The terminal device sends a registration request message to the access node, where the registration request message includes a first globally unique temporary user identifier, and the first globally unique temporary user identifier is allocated by the first access management node.

6. The method according to claim 5, characterized in that after the terminal device sends a registration request message to the access node, the method further comprises:

receiving a registration acceptance message from the access node, wherein the registration acceptance message includes a second globally unique temporary user identifier, and the second globally unique temporary user identifier is allocated by the first access management node or the second access management node;

The second globally unique temporary user identifier is different from the first globally unique temporary user identifier, and the first access management node is different from the second access management node.

7. A random access method, comprising:

The access node receives a first request message from a terminal device, where the first request message is used to request access to a wireless network during a random access process, and the first request message includes a random access identifier, where the random access identifier is used to identify the terminal device during the random access process;

The access node sends a first response message to the terminal device, where the first response message includes the random access identifier;

8. The method according to claim 7, characterized in that the method further comprises:

The access node receives a radio resource control RRC connection establishment completion message from the terminal device, wherein the RRC connection establishment completion message includes a service temporary mobile user identity, the service temporary mobile user identity includes the temporary mobile user identity and an identity of the first access management node, and the service temporary mobile user identity is allocated by the first access management node;

The access node selects a second access management node for the terminal device according to the service temporary mobile user identity.

9. The method according to claim 8, characterized in that after the access node receives the RRC connection establishment completion message from the terminal device, the access node selects a second access management node for the terminal device according to the service temporary mobile user identity, and further comprises:

The access node generates a first identifier according to the service temporary mobile user identifier;

When the first identifier is the same as the random access identifier, the access node selects a second access management node for the terminal device.

10. The method according to claim 9, wherein the access node generates the first identifier according to the service temporary mobile user identifier, comprising:

generating the first identifier according to the temporary mobile user identifier and a specific algorithm; or,

The first identifier is generated according to the identifier of the first access management node, the temporary mobile user identifier and a specific algorithm.

11. The method according to any one of claims 8 to 10, characterized in that the method further comprises:

The access node receives a registration request message from the terminal device;

The access node sends the registration request message to the service access management node, where the registration request message includes a first globally unique temporary user identifier, where the first globally unique temporary user identifier is allocated to the terminal device by the first access management node.

12. The method according to claim 11, characterized in that the method further comprises:

The access node receives a registration acceptance message from the second access management node;

The access node sends the registration acceptance message to the terminal device;

The registration acceptance message includes a second globally unique temporary user identifier, where the second globally unique temporary user identifier is allocated to the terminal device by the second access management node;

The second globally unique temporary user identifier is different from the first globally unique temporary user identifier.

13. A random access device, comprising:

A processing module, used to generate a random access identifier, where the random access identifier is used to identify a terminal device during a random access process;

A transceiver module, configured to send a first request message to an access node, wherein the first request message includes the random access identifier, and the first request message is used to request access to a wireless network during a random access process;

The transceiver module is further configured to receive a first response message from the access node, wherein the first response message includes the random access identifier;

The length of the random access identifier is smaller than the length of the temporary mobile user identifier, and the length of the temporary mobile user identifier is greater than or equal to 64 bits.

14. The device according to claim 13, wherein the transceiver module is further used for:

Sending a radio resource control (RRC) connection establishment completion message to the access node;

15. The device according to claim 13, characterized in that the processing module is specifically used for:

Generate the random access identifier according to the temporary mobile user identifier; or,

The random access identifier is generated by a specific algorithm according to a first globally unique temporary user identifier, wherein the composition structure of the first globally unique temporary user identifier includes the temporary mobile user identifier; or

A random number is generated as the random access identifier.

16. The device according to claim 15, characterized in that the processing module is further used for:

17. The device according to any one of claims 14 to 16, characterized in that the transceiver module is further used for:

A registration request message is sent to the access node, where the registration request message includes a first globally unique temporary user identifier, where the first globally unique temporary user identifier is allocated by the first access management node.

18. The device according to claim 17, wherein the transceiver module is further used for:

19. A random access device, comprising:

A transceiver module, configured to receive a first request message from a terminal device, wherein the first request message is used to request access to a wireless network during a random access process, and the first request message includes a random access identifier, and the random access identifier is used to identify the terminal device during the random access process;

The transceiver module is further configured to send a first response message to the terminal device, wherein the first response message includes the random access identifier.

20. The device according to claim 19, characterized in that

The transceiver module is further used to receive a radio resource control RRC connection establishment completion message from the terminal device, wherein the RRC connection establishment completion message includes a service temporary mobile user identity, wherein the service temporary mobile user identity includes the temporary mobile user identity and an identity of the first access management node, and the service temporary mobile user identity is allocated by the first access management node;

A processing module is used to select a second access management node for the terminal device according to the service temporary mobile user identity.

21. The device according to claim 20, characterized in that the processing module is further used for:

Generate a first identifier according to the service temporary mobile user identifier;

22. The device according to claim 21, characterized in that the processing module is further used for:

23. The device according to any one of claims 20 to 22, characterized in that the transceiver module is further used for:

Receiving a registration request message from the terminal device;

The registration request message is sent to the second access management node, where the registration request message includes a first globally unique temporary user identifier, where the first globally unique temporary user identifier is allocated to the terminal device by the first access management node.

24. The device according to claim 23, wherein the transceiver module is further used for:

receiving a registration acceptance message from the second access management node;

Sending the registration acceptance message to the terminal device;

25. A communication device, comprising:

Processor and memory;

The memory is used to store computer programs;

The processor is configured to execute the computer program stored in the memory, so that the communication device executes the communication method according to any one of claims 1 to 6, or executes the communication method according to any one of claims 7 to 12.

26. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is run on a computer, the computer executes the communication method as described in any one of claims 1 to 6, or executes the communication method as described in any one of claims 7 to 12.

27. A chip system, characterized in that it comprises: a processor, used to call and run a computer program from a memory, so that a communication device installed with the chip system executes the communication method as described in any one of claims 1 to 6, or executes the communication method as described in any one of claims 7 to 12.