WO2022022450A1

WO2022022450A1 - Network selection method, network access method and related node device

Info

Publication number: WO2022022450A1
Application number: PCT/CN2021/108406
Authority: WO
Inventors: 柴丽
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2020-07-27
Filing date: 2021-07-26
Publication date: 2022-02-03
Also published as: CN113993184A; CN113993184B

Abstract

Disclosed are a network selection method, a network access method and a related node device. The method comprises: a network node selecting, for a terminal, a cell that matches a state attribute of the terminal, wherein the cell has a unique service attribute, and/or, the cell has a unique management state; and the network node is a base station or the terminal.

Description

A network selection method, network access method and related node equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202010733137.3 and the filing date of July 27, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into the present application.

technical field

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

Background technique

In the past communication systems, the wireless communication between people was mainly considered. At present, the 5G communication service consists of enhanced mobile broadband (eMBB, Enhanced Mobile Broadband), massive machine communication (mMTC, massive Machine Type Communication), high reliability and low Latency (uRLLC, Ultra-Reliable and Low-Latency Communication) consists of three categories. In digital twin technology, the connection includes interconnection and collaboration between physical entities, virtual-real interconnection and interaction between physical entities and virtual entities, two-way communication and closed-loop control between physical entities and data/services, virtual entities, data and services. integration and integration. These connections support a richer variety of digital twin services. Therefore, on the one hand, the 6G network will expand to a wider world, breaking the boundaries of the traditional eMBB and URLLC of the 5G network, and broadening the support for more diverse digital twin services, such as low-latency, high-reliability and 5G eMBB. high-speed services. On the other hand, current 5G technology is only considered to support relatively small coverage areas, such as industrial factories, automated docks, etc. In 6G, applications that support digital twin technology will be introduced into large-scale sensor networks in wide areas, such as smart cities, which are mainly composed of massive sensors, high-computing devices and high-capacity storage devices. This large-scale sensor network will introduce large-scale low-latency and high-reliability services, and will integrate URLLC and mMTC services in the 5G tradition.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a network selection method, a network access method, and related node devices.

In order to achieve the above purpose, the technical solutions of the embodiments of the present application are implemented as follows:

In a first aspect, an embodiment of the present application provides a network selection method, the method comprising:

The network node selects a cell for the terminal that matches the state attribute of the terminal; the cell has a unique service attribute, and/or the cell has a unique management state; the network node is a base station or the terminal.

In some optional embodiments of the present application, the management state includes a connected state or an inactive state.

In some optional embodiments of the present application, the management state includes a four-layer protocol stack, a three-layer protocol stack or a one-layer protocol stack for data plane layer two management;

The four-layer protocol stack includes a Service Data Adaptation Protocol (SDAP, Service Data Adaptation Protocol) layer, a Packet Data Convergence Protocol (PDCP, Packet Data Convergence Protocol) layer, and a Radio Link Control (RLC, Radio Link Control) layer and Medium Access Control (MAC, Medium Access Control) layer;

Wherein, the three-layer protocol stack includes a PDCP layer, an RLC layer and a MAC layer;

Wherein, the one-layer protocol stack includes partial functions of at least one layer in the SDAP layer, the PDCP layer, the RLC layer, and the MAC layer.

In some optional embodiments of the present application, the management state includes a layer-2 protocol stack or a layer-1 protocol stack for control layer management;

Wherein, the two-layer protocol stack includes a non-access stratum (NAS, Non-Access Stratum) and a radio resource control (RRC, Radio Resource Control) layer;

The one-layer protocol stack includes some functions of the NAS and/or RRC layers.

In some optional embodiments of the present application, the state attribute of the terminal includes at least one of the following characteristics:

business type;

Buffer length of business data;

Quality of Service (QoS, Quality of Service) and/or Quality of Experience (QoE, Quality of Experience) of the business;

The moving speed and/or moving direction and/or moving trajectory of the business.

In some optional embodiments of the present application, the state attribute of the terminal includes a data packet characteristic of the terminal; the data packet characteristic includes a first data packet characteristic and/or a second data packet characteristic; satisfying the first data packet characteristic The length of the data packet with the second data packet characteristic is greater than the length of the data packet satisfying the first data packet characteristic;

The network node selects a cell matching the state attribute of the terminal for the terminal, including:

In the case that the state attribute of the terminal is the first data packet characteristic, the network node selects, for the terminal, a unique inactive cell that matches the first data packet characteristic of the terminal;

In the case that the state attribute of the terminal is the second data packet characteristic, the network node selects, for the terminal, a unique connected state cell that matches the second data packet characteristic of the terminal.

In some optional embodiments of the present application, the state attribute of the terminal includes a service attribute of the terminal;

The network node selects a cell for the terminal, and the unique service attribute of the cell matches the service attribute of the terminal.

In some optional embodiments of the present application, when the network node is the terminal, the network node selects a cell matching the state attribute of the terminal for the terminal, including:

The terminal determines the service attribute and/or management state of each cell based on the identity of each cell, and selects a cell matching the state attribute of the terminal based on the service attribute and/or management state of each cell.

In some optional embodiments of the present application, before the terminal determines the service attribute and/or management state of each cell based on the identity of each cell, the method further includes:

The terminal receives the first system message sent by the base station, where the first system message includes at least one of the following information:

at least one of the identity of one or more cells, the service attribute of the cell, and the mapping relationship of the management state;

Management status information supported by this cell and/or neighboring cells;

A list of cells in neighboring cells that have the same management state information as the current cell;

List of cells corresponding to different management state types supported by adjacent cells;

State attributes of the terminal supported by the current cell and/or neighboring cells.

In some optional embodiments of the present application, the method further includes: when the state attribute of the terminal changes, the network node reselects and changes the state attribute of the terminal for the terminal matching cells.

In some optional embodiments of the present application, when the network node is a base station, the network node reselects a cell for the terminal that matches the changed state attribute of the terminal, including:

receiving, by the base station, a message sent by the terminal, where the message at least includes the updated state attribute of the terminal;

The base station determines the service attribute and/or management state of each cell based on the identifier of each cell, and selects a cell matching the updated state attribute of the terminal based on the service attribute and/or management state of each cell.

In some optional embodiments of the present application, the method further includes: the base station sending the relevant information of the cell to the terminal.

In a second aspect, an embodiment of the present application further provides a network access method, the method comprising:

the base station receives a first message sent by the terminal, where the first message is used to request to establish a connection;

The base station parses the first message, obtains content contained in the first message, and establishes a connection with a data network node based on the content;

The base station sends a second message to the terminal in response to the first message.

In some optional embodiments of the present application, the first message further includes message content for random access, where the message content is the first message content in the two-step random access.

In some optional embodiments of the present application, the method further includes: the base station sends a first system message to the terminal, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the method further includes: the base station sends a second system message to the terminal, where the second system message includes indication information, where the indication information is used to indicate that no A random access procedure is performed.

In some optional embodiments of the present application, the content included in the first message includes all or part of the AS and NAS information of the connection establishment;

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

The identifier of the terminal, the capability information of the terminal, the network slice identifier, the address of the data network node, the service attribute information, and the cause value corresponding to the message.

In some optional embodiments of the present application, the establishing a connection with the data network node based on the content includes: the base station obtains information of the terminal according to the identifier of the terminal, and the information of the terminal at least includes a subscription information;

Determine the quality of service QoS information corresponding to the terminal according to the information of the terminal, determine wireless parameter configuration information according to the QoS information, and establish a connection with the data network node based on the wireless parameter configuration information and the address of the data network node;

The wireless parameter configuration information includes at least one of the following information: header compression parameters, security encryption parameters, and retransmission parameters.

In some optional embodiments of the present application, the second message includes at least one of the following information: configuration information of radio resources used by the terminal for data transmission in the cell, the identifier of the terminal in the cell, the address information for communication between the terminal and the data network node.

In some optional embodiments of the present application, the base station uses a user plane protocol layer to perform data processing, and the user plane protocol layer includes at least one of the following functions: a header compression function, a security encryption function, and a scheduling function , multiplexing and concatenation functions, semi-static resource configuration, protocol error detection and retransmission functions.

In a third aspect, an embodiment of the present application further provides a network access method, the method comprising:

The terminal sends a first message for requesting connection establishment to the base station; the content contained in the first message is used for establishing a connection between the base station and the data network node;

A second message is received in response to the first message.

In some optional embodiments of the present application, the method further includes: receiving, by the terminal, a first system message sent by the base station, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the method further includes: receiving, by the terminal, a second system message sent by the base station, where the second system message includes indication information, where the indication information is used to indicate that no A random access procedure needs to be performed.

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

In a fourth aspect, an embodiment of the present application further provides a network node, the network node includes a selection unit configured to select a cell matching a state attribute of the terminal for a terminal; the cell has a unique service attribute, and /or, the cell has a unique management state; the network node is a base station or the terminal.

Wherein, the four-layer protocol stack includes SDAP layer, PDCP layer, RLC layer and MAC layer;

Wherein, the one-layer protocol stack includes partial functions of at least one layer in SDAP, PDCP layer, RLC layer, and MAC layer.

Wherein, the two-layer protocol stack includes a NAS layer and an RRC layer;

business type;

Buffer length of business data;

Qos and/or QoE of the business;

The selection unit is configured to select, for the terminal, the only non-identical data packet matching the first data packet characteristic of the terminal by the network node when the state attribute of the terminal is the first data packet characteristic. A cell in an active state; when the state attribute of the terminal is the second data packet characteristic, the network node selects for the terminal a unique connected state that matches the second data packet characteristic of the terminal community.

In some optional embodiments of the present application, the state attribute of the terminal includes a service attribute of the terminal; the selection unit is configured to select a cell for the terminal, and the only service attribute of the cell is the same as the service attribute of the terminal. match the service attributes of the terminal.

In some optional embodiments of the present application, the selection unit is configured to, when the network node is the terminal, determine the service attribute and/or management status of each cell based on the identifier of each cell, and based on each cell The service attribute and/or management state of the cell selects a cell that matches the state attribute of the terminal.

In some optional embodiments of the present application, the network node further includes a first receiving unit, configured to receive the information sent by the base station before the selecting unit determines the service attribute and/or management state of each cell based on the identifier of each cell. The first system message, the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the selection unit is further configured to, when the state attribute of the terminal changes, the network node reselects the terminal for the terminal and the changed status of the terminal Cells whose state attributes match.

In some optional embodiments of the present application, the network node further includes a second receiving unit, configured to receive a message sent by the terminal when the network node is a base station, where the message at least includes the The state attribute after the terminal is updated;

The selecting unit is configured to determine the service attribute and/or management state of each cell based on the identifier of each cell, and select a cell matching the updated state attribute of the terminal based on the service attribute and/or management state of each cell.

In some optional embodiments of the present application, the network node further includes a first sending unit configured to send the relevant information of the cell to the terminal.

In a fifth aspect, an embodiment of the present application further provides a base station, where the base station includes a third receiving unit, a first processing unit, and a second sending unit; wherein,

The third receiving unit is configured to receive a first message sent by the terminal, where the first message is used to request the establishment of a connection;

Therefore, the first processing unit is configured to parse the first message, obtain the content contained in the first message, and establish a connection with the data network node based on the content;

The second sending unit is configured to send a second message for responding to the first message to the terminal.

In some optional embodiments of the present application, the second sending unit is further configured to send a first system message to the terminal, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the second sending unit is further configured to send a second system message to the terminal, where the second system message includes indication information, where the indication information is used to indicate that no A random access procedure needs to be performed.

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

In some optional embodiments of the present application, the first processing unit is configured to obtain information of the terminal according to the identifier of the terminal, and the information of the terminal at least includes subscription information; the QoS information corresponding to the terminal, determine wireless parameter configuration information according to the QoS information, and establish a connection with the data network node based on the wireless parameter configuration information and the address of the data network node; wherein, the wireless parameter configuration information includes the following At least one of the information: a header compression parameter, a security encryption parameter, and a retransmission parameter.

In a sixth aspect, an embodiment of the present application further provides a terminal, where the terminal includes: a third sending unit and a fourth receiving unit; wherein,

The third sending unit is configured to send a first message for requesting to establish a connection to the base station; the content contained in the first message is used for the base station to establish a connection with a data network node;

The fourth receiving unit is configured to receive a second message for responding to the first message.

In some optional embodiments of the present application, the fourth receiving unit is further configured to receive a first system message sent by the base station, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the fourth receiving unit is further configured to receive a second system message sent by the base station, where the second system message includes indication information, where the indication information is used to indicate No random access procedure needs to be performed.

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

In a seventh aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, implements the steps of the network selection method described in the first aspect of the embodiment of the present application; or , and when the program is executed by the processor, the steps of the network access method described in the second aspect or the third aspect of the embodiments of the present application are implemented.

In an eighth aspect, an embodiment of the present application further provides a network node, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the implementation of the present application when executing the program Examples are the steps of the network selection method described in the first aspect.

In a ninth aspect, an embodiment of the present application further provides a base station, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor implements the embodiment of the present application when the processor executes the program The steps of the network access method in the second aspect.

In a tenth aspect, an embodiment of the present application further provides a terminal, including a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor implements the embodiment of the present application when the processor executes the program The steps of the network access method described in the third aspect.

The network selection method, network access method, and related node equipment provided by the embodiments of the present application include: a network node selects a cell for a terminal that matches a state attribute of the terminal; the cell has a unique service attribute, and /or, the cell has a unique management state; the network node is a base station or the terminal. By adopting the technical solutions of the embodiments of the present application, through the simplified network design, the service attributes or management states of the cells are single, so that the structure and processing devices of the network side equipment are relatively simple, and the functions are greatly simplified compared with the traditional network side equipment. Thereby, the data processing delay is also greatly shortened.

Description of drawings

FIG. 1 is a schematic flowchart 1 of a network selection method according to an embodiment of the present application;

FIG. 2 is a schematic flowchart 1 of a network access method according to an embodiment of the present application;

3 is a schematic diagram of a user plane protocol layer of one layer according to an embodiment of the application;

FIG. 4 is a schematic diagram of an interaction flow of a network access method according to an embodiment of the present application;

FIG. 5 is a schematic diagram 1 of the composition structure of a network node according to an embodiment of the present application;

FIG. 6 is a second schematic diagram of the composition and structure of a network node according to an embodiment of the present application;

FIG. 7 is a third schematic diagram of the composition structure of a network node according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a composition structure of a base station according to an embodiment of the present application;

FIG. 9 is a schematic diagram of a composition structure of a terminal according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a hardware composition of a communication device according to an embodiment of the present application.

detailed description

The present application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

The embodiments of the present application provide a network selection method. Fig. 1 is a schematic flowchart 1 of a network selection method according to an embodiment of the application; as shown in Fig. 1 , the method includes:

Step 101: The network node selects a cell for the terminal that matches the state attribute of the terminal; the cell has a unique service attribute, and/or the cell has a unique management state; the network node is a base station or the terminal.

In some optional embodiments of the present application, the state attribute of the terminal includes a data packet characteristic of the terminal; the data packet characteristic includes a first data packet characteristic and/or a second data packet characteristic; satisfying the first data packet characteristic The length of the data packet with the second data packet characteristic (that is, the size of the data packet) is greater than the length of the data packet satisfying the first data packet characteristic; the network node selects a cell matching the state attribute of the terminal for the terminal, including : in the case that the state attribute of the terminal is the first data packet characteristic, the network node selects, for the terminal, the only cell with an inactive state that matches the first data packet characteristic of the terminal; In the case where the state attribute of the terminal is the second data packet characteristic, the network node selects, for the terminal, a unique cell in the connected state that matches the second data packet characteristic of the terminal.

In this embodiment, the data packet characteristics of the terminal may include large packet transmission or small packet transmission. The "large packet" in the large packet transmission or the "small packet" in the small packet transmission is related to the data volume of the data to be transmitted. If the data volume meets certain conditions, it can be determined as a "large packet"; correspondingly, if the data does not meet the This condition, or the data satisfies another condition, can be determined as a "small packet". Exemplarily, the large-packet transmission or small-packet transmission is related to the service type; if the service type satisfies a certain service type range, it can be determined to be a large-packet transmission; correspondingly, if the service type does not meet the service type range, or the service type satisfies Another service type range can be determined as small packet transmission.

In this embodiment, the network node (base station or terminal) selects the corresponding cell according to the state attribute of the terminal, that is, selects the corresponding cell according to whether the data corresponding to the terminal is large packet transmission or small packet transmission. It can be understood that the selected cell has a single service attribute or a single management state, which can adapt to the state attribute of the terminal and provide services for it.

In this embodiment, the management state includes a connected state or an inactive state. Exemplarily, if the state attribute of the terminal is small packet transmission, the management state of the selected cell only has an inactive state; if the state attribute of the terminal is large packet transmission, the management state of the selected cell only has an active state.

It can be understood that, in an embodiment, the terminal may have two state attributes of large packet transmission and small packet transmission, and the network node may select a cell corresponding to the current state attribute for the terminal based on the current state attribute of the terminal, respectively. It can be understood that if the terminal switches from the state attribute of large packet transmission to the state attribute of small packet transmission, the network node needs to reselect a matching cell for the terminal. In another embodiment, the terminal may also have only one state attribute, for example, the terminal only has the state attribute of large packet transmission or small packet transmission, and the network node may select a matching cell for the terminal based on the state attribute only possessed by the terminal.

In some optional embodiments of the present application, the state attribute of the terminal includes the service attribute of the terminal; and the network node selects a cell matching the state attribute of the terminal for the terminal, including: the network node is: The terminal selects a cell, and the unique service attribute of the cell matches the service attribute of the terminal.

In this embodiment, the service attribute of the terminal may include a service type, and the selected cell has a single service attribute, which can adapt to the service attribute of the terminal and provide services for it.

In some optional embodiments of the present application, when the network node is the terminal, the network node selects a cell for the terminal that matches the state attribute of the terminal, including: the terminal is based on each cell The identifier of each cell determines the service attribute and/or management state of each cell, and selects a cell matching the state attribute of the terminal based on the service attribute and/or management state of each cell.

In some optional embodiments of the present application, before the terminal determines the service attribute and/or management state of each cell based on the identifier of each cell, the method further includes: the terminal receives the first system message sent by the base station, The first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In this embodiment, the above-mentioned at least one kind of information may be identified by a reserved field in the first system message. Exemplarily, taking the first system message including the identifiers of one or more cells as an example, the terminal can directly identify the service attribute of the cell corresponding to the cell identifier according to the cell identifier (ID).

Compared with the traditional system message design, the system message in this embodiment is also more concise, and only the system message related to the function of the cell needs to be provided. If it is a dedicated cell, for example, a cell in a certain factory area, the area number (or identifier) customized by the factory area will be used to replace the Public Land Mobile Network (PLMN, Public Land Mobile Network) of the traditional network, or the slice number (or identifier) of the traditional network will be replaced. PLMN.

In some optional embodiments, the method further includes: when the state attribute of the terminal changes, the network node reselects a cell for the terminal that matches the changed state attribute of the terminal .

In some optional embodiments of the present application, when the network node is a base station, the network node reselects a cell for the terminal that matches the changed state attribute of the terminal, including: the The base station receives a message sent by the terminal, and the message includes at least the updated state attribute of the terminal; the base station determines the service attribute and/or management state of each cell based on the identification of each cell, and determines the service attribute and/or management state of each cell based on the service attribute of each cell. And/or the management state selects a cell matching the updated state attribute of the terminal.

Wherein, the two-layer protocol stack includes NAS and RRC layers;

business type;

Buffer length of business data;

QoS and/or QoE of the service;

In some optional embodiments, the network node may also determine the classification of the terminal based on the state attribute of the terminal, and select a matching cell based on the classification of the terminal. Exemplarily, for different applications, different multi-dimensional feature combinations may be selected to classify terminals. For example, the user transmission priority can be sorted according to the service type and the buffer length of the service data; the terminal can be allocated an appropriate cell access and camping policy according to the service type and the moving speed of the service (such as the moving speed of the terminal); or , which can also be based on features such as trajectory pattern, speed of movement, and direction of movement.

Based on the foregoing embodiments, the embodiments of the present application further provide a network access method. FIG. 2 is a schematic flowchart 1 of a network access method according to an embodiment of the present application; as shown in FIG. 2 , the method includes:

Step 201: the base station receives a first message sent by the terminal, where the first message is used to request the establishment of a connection;

Step 202: the base station parses the first message, obtains the content contained in the first message, and establishes a connection with a data network (DN, Data Network) node based on the content;

Step 203: The base station sends a second message for responding to the first message to the terminal.

Correspondingly, for the terminal, the network access method may include: the terminal sends a first message for requesting connection establishment to the base station; the content contained in the first message is used for establishing the connection between the base station and the data network node; in a second message in response to the first message.

Management status information supported by this cell and/or neighboring cells;

Correspondingly, the terminal receives the above-mentioned first system message.

In some optional embodiments of the present application, the method further includes: the base station sends a second system message to the terminal, where the second system message includes indication information, where the indication information is used to indicate that no A random access procedure is performed. Correspondingly, the terminal receives the above-mentioned second system message.

Among them, the NAS class information adopts the explicit definition to replace the definition of the octet string (OCTET STRING);

Or: NAS class information includes at least one of the following:

In this embodiment, the first message (ie, the connection establishment request message) is no longer divided into RRC and NAS layers.

In some optional embodiments of the present application, the establishing a connection with the data network node based on the content includes: the base station obtains information of the terminal according to the identifier of the terminal, and the information of the terminal at least includes a subscription information; determine the QoS information corresponding to the terminal according to the information of the terminal, determine the wireless parameter configuration information according to the QoS information, and establish a connection with the data network node based on the wireless parameter configuration information and the address of the data network node; The wireless parameter configuration information includes at least one of the following information: header compression parameters, security encryption parameters, and retransmission parameters.

For example, as shown in FIG. 3, a user plane protocol layer may include: a header compression (ROHO, Robust Header Compression) function, a security (Security) function, a hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat reQuest) function, scheduling (Scheduling)/priority handling (priority handling) function and so on.

In this embodiment, because the service of the cell is single, it is not necessary to use the data radio bearer (DRB, Data Radio Bearer) to distinguish different service characteristics, at most the difference in destination addresses; therefore, there is no service priority scheduling, such as policy routing ( PBR) and other parameters and the application of corresponding functions; the scheduling of logical channels only needs to consider the arrival time, or the number of retransmissions as scheduling considerations.

Using the technical solutions of the embodiments of the present application, on the one hand, through the simplified network design, the service attributes or management states of the cells are single, so that the structure and processing devices of the network side equipment are relatively simple, which is greatly simplified compared with the traditional network side equipment. function, thereby greatly shortening the data processing delay. On the other hand, due to the simplification of the functions of the network-side equipment, the embodiments of the present application can also optimize the protocol architecture, specifically by merging the protocol architecture of the user plane, for example, simplifying the four-layer protocol layer to one protocol layer. It can greatly shorten the data processing delay. On the other hand, the present application can be based on the cell of the user group with the same service characteristics, or even based on the processing of data of the user's cell, and the terminal can directly identify the service attribute of the cell and so on according to the cell identifier.

The cell selection method according to the embodiment of the present application will be described below with reference to a specific example. FIG. 4 is a schematic diagram of an interaction flow of a network selection method according to an embodiment of the present application; in this example, the network node is taken as an example for description. As shown in Figure 4, the method includes:

Step 301: The base station selects a cell for the terminal that matches the state attribute of the terminal, the cell has a unique service attribute, and/or the cell has a unique management state.

Step 302: The terminal sends a first message for requesting connection establishment to the base station corresponding to the selected cell.

Wherein, optionally, the first message further includes a message for random access, and the message is the first message in the two-step random access. In this embodiment, for the random access process, if the two-step random access technology is adopted, the first message for requesting connection establishment may be combined with the first message in the two-step random access process.

Step 303: The base station parses the first message, obtains the content contained in the first message, and establishes a connection with the data network node based on the content.

In this embodiment, the first message is no longer divided into two layers: RRC and NAS, and the base station can parse all the contents of the first message, for example, it may include: the identifier of the terminal, the capability of the terminal, the slice identifier, the characteristics of the service, the address of the DN, The reason for initiation, etc.

Step 304: The base station sends a second message for responding to the first message to the terminal; the second message may include the identity of the cell where the terminal is located, and the radio resource configuration used by the terminal for data transmission in the cell information, address information of the terminal communicating with the data network node.

The embodiment of the present application also provides a network node. FIG. 5 is a schematic diagram 1 of the composition structure of a network node according to an embodiment of the application; as shown in FIG. 5 , the network node includes a selection unit 31 configured to select a cell matching the state attribute of the terminal for the terminal; the cell has a unique service attribute, and/or the cell has a unique management state; the network node is a base station or the terminal.

Wherein, the one-layer protocol stack includes partial functions of at least one layer of SDAP, PDCP layer, RLC layer, and MAC layer.

Wherein, the two-layer protocol stack includes a NAS layer and an RRC layer;

business type;

Buffer length of business data;

QoS and/or QoE of the service;

The selection unit 31 is configured to select, for the terminal, the only one with the first data packet characteristic that matches the first data packet characteristic of the terminal when the state attribute of the terminal is the first data packet characteristic. A cell in an inactive state; in the case that the state attribute of the terminal is the second data packet characteristic, the network node selects for the terminal a unique connection state that matches the second data packet characteristic of the terminal 's district.

In some optional embodiments of the present application, the state attribute of the terminal includes the service attribute of the terminal; the selection unit 31 is configured to select a cell for the terminal, and the only service attribute of the cell is the same as that of the terminal. The service attributes of the terminals are matched.

In some optional embodiments of the present application, the selection unit 31 is configured to, when the network node is the terminal, determine the service attribute and/or management state of each cell based on the identifier of each cell, and based on the The service attribute and/or management state of each cell selects a cell that matches the state attribute of the terminal.

In some optional embodiments of the present application, as shown in FIG. 6 , the network node further includes a first receiving unit 33, configured for the selecting unit 31 to determine the service attribute and/or the service attribute of each cell based on the identifier of each cell Before the management state, a first system message sent by the base station is received, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

A list of cells in neighboring cells that have the same management status information as the current cell;

In some optional embodiments of the present application, the selection unit 31 is further configured to, when the state attribute of the terminal changes, the network node reselects and changes the terminal for the terminal The state attribute of the matching cell.

In some optional embodiments of the present application, as shown in FIG. 7 , the network node further includes a second receiving unit 34, configured to receive a message sent by the terminal when the network node is a base station, The message includes at least the updated state attribute of the terminal;

The selecting unit 31 is configured to determine the service attribute and/or management state of each cell based on the identifier of each cell, and select a cell matching the updated state attribute of the terminal based on the service attribute and/or management state of each cell.

In some optional embodiments of the present application, the network node further includes a first sending unit 32, configured to send the relevant information of the cell to the terminal.

In this embodiment of the present application, the selection unit 31 in the network node can be, in practical applications, a central processing unit (CPU, Central Processing Unit), a digital signal processor (DSP, Digital Signal Processor), Microcontroller Unit (MCU, Microcontroller Unit) or Programmable Gate Array (FPGA, Field-Programmable Gate Array) is implemented; the first receiving unit 33, the second receiving unit 34 and the first sending unit 32 in the network node are In practical applications, it can be realized by communication modules (including basic communication suites, operating systems, communication modules, standardized interfaces and protocols, etc.) and transceiver antennas.

It should be noted that: when the network nodes provided in the above-mentioned embodiments perform network selection, only the division of the above-mentioned program modules is used as an example. The internal structure of the network node is divided into different program modules to complete all or part of the processing described above. In addition, the network nodes provided in the above embodiments belong to the same concept as the network selection method embodiments, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

The embodiment of the present application also provides a base station. FIG. 8 is a schematic diagram of the composition and structure of a base station according to an embodiment of the application; as shown in FIG. 8 , the base station includes a third receiving unit 41, a first processing unit 42 and a second sending unit 43; wherein,

The third receiving unit 41 is configured to receive a first message sent by the terminal, where the first message is used to request the establishment of a connection;

Therefore, the first processing unit 42 is configured to parse the first message, obtain the content contained in the first message, and establish a connection with the data network node based on the content;

The second sending unit 43 is configured to send a second message for responding to the first message to the terminal.

In some optional embodiments of the present application, the second sending unit 43 is further configured to send a first system message to the terminal, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the second sending unit 43 is further configured to send a second system message to the terminal, where the second system message includes indication information, and the indication information is used to indicate No random access procedure needs to be performed.

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

In some optional embodiments of the present application, therefore, the first processing unit 42 is configured to obtain the information of the terminal according to the identifier of the terminal, and the information of the terminal at least includes subscription information; determine according to the information of the terminal the QoS information corresponding to the terminal, determine wireless parameter configuration information according to the QoS information, and establish a connection with the data network node based on the wireless parameter configuration information and the address of the data network node; wherein, the wireless parameter configuration information includes At least one of the following information: header compression parameters, security encryption parameters, and retransmission parameters.

In this embodiment of the present application, the first processing unit 42 in the base station can be implemented by a CPU, DSP, MCU or FPGA in the base station in practical applications; the third receiving unit 41 in the base station and the second sending unit 41 in the base station The unit 43 can be implemented by a communication module (including: a basic communication suite, an operating system, a communication module, standardized interfaces and protocols, etc.) and a transceiver antenna in practical applications.

It should be noted that: when the base station provided in the above-mentioned embodiment performs network access, only the division of the above-mentioned program modules is used as an example. The internal structure of the base station is divided into different program modules to complete all or part of the processing described above. In addition, the base station and the network access method embodiments provided by the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

The embodiment of the present application also provides a terminal. FIG. 9 is a schematic diagram of the composition and structure of a terminal according to an embodiment of the present application; as shown in FIG. 9 , the terminal includes: a third sending unit 51 and a fourth receiving unit 52; wherein,

The third sending unit 51 is configured to send a first message for requesting connection establishment to the base station; the content contained in the first message is used for the base station to establish a connection with a data network node;

The fourth receiving unit 52 is configured to receive a second message for responding to the first message.

In some optional embodiments of the present application, the fourth receiving unit 52 is further configured to receive a first system message sent by the base station, where the first system message includes at least one of the following information:

Management status information supported by this cell and/or neighboring cells;

In some optional embodiments of the present application, the fourth receiving unit 52 is further configured to receive a second system message sent by the base station, where the second system message includes indication information, and the indication information is used for Indicates that no random access procedure needs to be performed.

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

In the embodiment of the present application, the third sending unit 51 and the fourth receiving unit 52 in the terminal can pass through a communication module (including: basic communication suite, operating system, communication module, standardized interface and protocol, etc. ) and the transceiver antenna implementation.

It should be noted that: when the terminal provided in the above embodiment performs network access, only the division of the above program modules is used as an example. The internal structure of the terminal is divided into different program modules to complete all or part of the processing described above. In addition, the terminal and network access method embodiments provided by the above embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

An embodiment of the present application further provides a communication device, where the communication device may be a network node, a base station, or a terminal in the foregoing embodiments. FIG. 10 is a schematic diagram of a hardware structure of a communication device according to an embodiment of the application; as shown in FIG. 10 , the communication device includes a memory 62 , a processor 61 and a computer program stored in the memory 62 and running on the processor 61 , the processor 61 implements the steps of the network selection method applied to a network node or base station described in the embodiments of the present application when executing the program.

Optionally, a network interface 63 may also be included in the communication device. The various components in the communication device are coupled together by a bus system 64 . It will be appreciated that the bus system 64 is used to implement the connection communication between these components. In addition to the data bus, the bus system 64 also includes a power bus, a control bus and a status signal bus. For the sake of clarity, however, the various buses are designated as bus system 64 in FIG. 10 .

It will be appreciated that memory 62 may be either volatile memory or non-volatile memory, and may include both volatile and non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-only memory) Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, ferromagnetic random access memory), Flash Memory (Flash Memory), Magnetic Surface Memory , CD-ROM, or CD-ROM (Compact Disc Read-Only Memory); magnetic surface memory can be disk memory or tape memory. Volatile memory may be Random Access Memory (RAM), which acts as an external cache. By way of example but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), Enhanced Type Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory) ). The memory 62 described in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.

The methods disclosed in the above embodiments of the present application may be applied to the processor 61 or implemented by the processor 61 . The processor 61 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in the processor 61 or an instruction in the form of software. The above-mentioned processor 61 may be a general-purpose processor, a DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The processor 61 may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the memory 62, and the processor 61 reads the information in the memory 62, and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the communication device may be implemented by one or more Application Specific Integrated Circuit (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, Programmable Logic Device), Complex Programmable Logic Device (CPLD, Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, Microprocessor (Microprocessor), or other electronic components implemented for performing the aforementioned method.

In an exemplary embodiment, the embodiment of the present application further provides a computer-readable storage medium, such as a memory 62 including a computer program, and the computer program can be executed by the processor 61 of the communication device to complete the steps of the foregoing method. The computer-readable storage medium can be memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM; it can also be various devices including one or any combination of the above memories.

The computer-readable storage medium provided by the embodiment of the present application further stores a computer program thereon, and when the program is executed by the processor, implements the steps of the network selection method applied to the network node or the base station described in the embodiment of the present application.

The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined under the condition of no conflict to obtain new method embodiments.

The features disclosed in the several product embodiments provided in this application can be combined arbitrarily without conflict to obtain a new product embodiment.

The features disclosed in several method or device embodiments provided in this application can be combined arbitrarily without conflict to obtain new method embodiments or device embodiments.

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

The unit described above as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above integration The unit can be implemented either in the form of hardware or in the form of hardware plus software functional units.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by program instructions related to hardware, the aforementioned program may be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic disk or an optical disk and other media that can store program codes.

Alternatively, if the above-mentioned integrated units of the present application are implemented in the form of software function modules and sold or used as independent products, they may also be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence or in the parts that make contributions to the prior art. The computer software products are stored in a storage medium and include several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) is caused to execute all or part of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic disk or an optical disk and other mediums that can store program codes.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A network selection method, the method comprising:

The network node selects a cell for the terminal that matches the state attribute of the terminal; the cell has a unique service attribute, and/or the cell has a unique management state; the network node is a base station or the terminal.
The method of claim 1, wherein the management state includes a connected state or an inactive state.
The method according to claim 1, wherein the management state comprises a four-layer protocol stack, a three-layer protocol stack or a one-layer protocol stack for data plane layer two management;

Wherein, the four-layer protocol stack includes a service data adaptation protocol SDAP layer, a packet data convergence protocol PDCP layer, a radio link control RLC layer and a medium access control MAC layer;

Wherein, the three-layer protocol stack includes a PDCP layer, an RLC layer and a MAC layer;

Wherein, the one-layer protocol stack includes partial functions of at least one layer in the SDAP layer, the PDCP layer, the RLC layer, and the MAC layer.
The method according to claim 1, wherein the management state comprises a layer 2 protocol stack or a layer 1 protocol stack for control layer management;

Wherein, the layer 2 protocol stack includes a non-access stratum NAS and a radio resource control RRC layer;

The one-layer protocol stack includes some functions of the NAS and/or RRC layers.
The method according to claim 1, wherein the state attribute of the terminal includes at least one of the following characteristics:

business type;

Buffer length of business data;

Quality of Service QoS and/or Quality of Experience QoE of the business;

The moving speed and/or moving direction and/or moving trajectory of the business.
The method according to claim 2, wherein the state attribute of the terminal comprises a data packet characteristic of the terminal; the data packet characteristic comprises a first data packet characteristic and/or a second data packet characteristic; The length of the data packet with the second data packet characteristic is greater than the length of the data packet satisfying the first data packet characteristic;

The network node selects a cell matching the state attribute of the terminal for the terminal, including:

In the case that the state attribute of the terminal is the first data packet characteristic, the network node selects, for the terminal, a unique inactive cell that matches the first data packet characteristic of the terminal;

In the case that the state attribute of the terminal is the second data packet characteristic, the network node selects, for the terminal, a unique connected state cell that matches the second data packet characteristic of the terminal.
The method according to claim 1, wherein the state attribute of the terminal comprises a service attribute of the terminal;

The network node selects a cell matching the state attribute of the terminal for the terminal, including:

The network node selects a cell for the terminal, and the unique service attribute of the cell matches the service attribute of the terminal.
The method according to claim 1, wherein, in the case that the network node is the terminal, the network node selects a cell matching the state attribute of the terminal for the terminal, comprising:

The terminal determines the service attribute and/or management state of each cell based on the identifier of each cell, and selects a cell matching the state attribute of the terminal based on the service attribute and/or management state of each cell.
The method according to claim 8, wherein before the terminal determines the service attribute and/or management state of each cell based on the identity of each cell, the method further comprises:

The terminal receives the first system message sent by the base station, where the first system message includes at least one of the following information:

at least one of the identity of one or more cells, the service attribute of the cell, and the mapping relationship of the management state;

Management status information supported by this cell and/or neighboring cells;

A list of cells in neighboring cells that have the same management state information as the current cell;

List of cells corresponding to different management state types supported by adjacent cells;

State attributes of the terminal supported by the current cell and/or neighboring cells.
The method of claim 1, wherein the method further comprises:

When the state attribute of the terminal changes, the network node reselects a cell for the terminal that matches the changed state attribute of the terminal.
The method according to claim 10, wherein, when the network node is a base station, the network node reselects a cell for the terminal that matches the changed state attribute of the terminal, comprising:

receiving, by the base station, a message sent by the terminal, where the message at least includes the updated state attribute of the terminal;

The base station determines the service attribute and/or management state of each cell based on the identifier of each cell, and selects a cell matching the updated state attribute of the terminal based on the service attribute and/or management state of each cell.
The method according to claim 11, wherein the method further comprises: the base station sending the relevant information of the cell to the terminal.
A network access method, the method comprising:

the base station receives a first message sent by the terminal, where the first message is used to request to establish a connection;

The base station parses the first message, obtains content contained in the first message, and establishes a connection with a data network node based on the content;

The base station sends a second message to the terminal in response to the first message.
The method according to claim 13, wherein the first message further includes message content for random access, and the message content is the first message content in the two-step random access.
The method of claim 13, wherein the method further comprises:

The base station sends a first system message to the terminal, where the first system message includes at least one of the following information:

at least one of the identity of one or more cells, the service attribute of the cell, and the mapping relationship of the management state;

Management status information supported by this cell and/or neighboring cells;

A list of cells in neighboring cells that have the same management state information as the current cell;

List of cells corresponding to different management state types supported by adjacent cells;

State attributes of the terminal supported by the current cell and/or neighboring cells.
The method of claim 13, wherein the method further comprises:

The base station sends a second system message to the terminal, where the second system message includes indication information, where the indication information is used to indicate that a random access procedure does not need to be performed.
The method according to claim 13, wherein the content contained in the first message includes all or part of the AS and NAS information of the connection establishment;

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

The identifier of the terminal, the capability information of the terminal, the network slice identifier, the address of the data network node, the service attribute information, and the cause value corresponding to the message.
The method according to claim 17, wherein the establishing a connection with a data network node based on the content comprises:

The base station obtains the information of the terminal according to the identifier of the terminal, and the information of the terminal at least includes subscription information;

Determine the quality of service QoS information corresponding to the terminal according to the information of the terminal, determine wireless parameter configuration information according to the QoS information, and establish a connection with the data network node based on the wireless parameter configuration information and the address of the data network node;

The wireless parameter configuration information includes at least one of the following information: header compression parameters, security encryption parameters, and retransmission parameters.
The method according to claim 13, wherein the second message includes at least one of the following information: radio resource configuration information used by the terminal for data transmission in the cell, identifier of the terminal in the cell, address information for communication between the terminal and the data network node.
The method according to any one of claims 13 to 19, wherein the base station uses a user plane protocol layer to perform data processing, and the user plane protocol layer includes at least one of the following functions: a header compression function, a security Encryption function, scheduling function, multiplexing and concatenation function, semi-static resource configuration, protocol error detection and retransmission function.
A network access method, the method comprising:

The terminal sends a first message for requesting connection establishment to the base station; the content contained in the first message is used for establishing a connection between the base station and the data network node;

A second message is received in response to the first message.
The method according to claim 21, wherein the first message further includes message content for random access, and the message content is the first message content in the two-step random access.
The method of claim 21, wherein the method further comprises:

The terminal receives a first system message sent by the base station, where the first system message includes at least one of the following information:

at least one of the identity of one or more cells, the service attribute of the cell, and the mapping relationship of the management state;

Management status information supported by this cell and/or neighboring cells;

A list of cells in neighboring cells that have the same management status information as the current cell;

List of cells corresponding to different management state types supported by adjacent cells;

State attributes of the terminal supported by the current cell and/or neighboring cells.
The method of claim 21, wherein the method further comprises:

The terminal receives a second system message sent by the base station, where the second system message includes indication information, where the indication information is used to indicate that a random access procedure does not need to be performed.
The method according to claim 21, wherein the content contained in the first message includes all or part of the AS and NAS information of the connection establishment;

Among them, the NAS class information is explicitly defined;

Or: NAS class information includes at least one of the following:

The identifier of the terminal, the capability information of the terminal, the network slice identifier, the address of the data network node, the service attribute information, and the cause value corresponding to the message.
The method according to claim 21, wherein the second message includes at least one of the following information: radio resource configuration information used by the terminal for data transmission in the cell, an identifier of the terminal in the cell, the address information for communication between the terminal and the data network node.
A network node, the network node comprising a selection unit configured to select a cell for a terminal that matches a state attribute of the terminal; the cell has a unique service attribute, and/or the cell has a unique management state ; the network node is a base station or the terminal.
A base station, the base station includes a third receiving unit, a first processing unit and a second sending unit; wherein,

The third receiving unit is configured to receive a first message sent by the terminal, where the first message is used to request the establishment of a connection;

Therefore, the first processing unit is configured to parse the first message, obtain the content contained in the first message, and establish a connection with the data network node based on the content;

The second sending unit is configured to send a second message for responding to the first message to the terminal.
A terminal comprising: a third sending unit and a fourth receiving unit; wherein,

The third sending unit is configured to send a first message for requesting connection establishment to the base station; the content contained in the first message is used for the base station to establish a connection with a data network node;

The fourth receiving unit is configured to receive a second message for responding to the first message.
A computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of the method described in any one of claims 1 to 12; or, when the program is executed by the processor, implements claim 13 The steps of any one of the methods described in claims 21 to 20; or, when the program is executed by the processor, the steps of any one of the methods described in claims 21 to 26 are implemented.
A network node includes a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of any one of claims 1 to 12 when the processor executes the program.
A base station, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of claims 13 to 20 when the processor executes the program.
A terminal, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method according to any one of claims 21 to 26 when the processor executes the program.