CN113993184A

CN113993184A - Network selection method, network access method and related node equipment

Info

Publication number: CN113993184A
Application number: CN202010733137.3A
Authority: CN
Inventors: 柴丽
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2022-01-28
Anticipated expiration: 2040-07-27
Also published as: CN113993184B; WO2022022450A1

Abstract

The embodiment of the invention discloses a network selection method, a network access method and related node equipment. The method comprises the following steps: the network node selects a cell matched with 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.

Description

Network selection method, network access method and related node equipment

Technical Field

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

Background

In past Communication systems, the emphasis is on human-to-human wireless Communication, and currently, 5G Communication services are composed of three major categories, namely Enhanced Mobile Broadband (eMBB), large Machine Type Communication (mtc), and high-reliability Low-Latency (urrllc). In the digital twin technology, the connection includes interconnection and cooperation between physical entities, virtual-real interconnection and interaction between physical entities and virtual entities, bidirectional communication and closed-loop control between physical entities and data/services, integration and fusion between virtual entities, data and services, and the like. These connections support a much richer diverse digital twin service. Thus, on the one hand, 6G networks will be expanded to a wider range, breaking the traditional eMBB and URLLC of 5G networks, widening the range of digital twin services supporting a richer diversity, such as high-rate traffic including low latency high reliability and like 5G eMBB. On the other hand, current 5G technology only allows for support of relatively small coverage areas, such as industrial plants, automated docking docks, and the like. In 6G, the application of the technology supporting digital twins will be introduced into a wide-area large-scale sensor network, such as a smart city, which is mainly composed of mass sensors, high-computing power devices and high-capacity storage devices. The large-scale sensing network introduces large-scale low-delay high-reliability services, and integrates URLLC and mMTC services in 5G tradition.

Disclosure of Invention

In order to solve the existing technical problem, embodiments of the present invention provide a network selection method, a network access method, and a related node device.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a network selection method, where the method includes:

the network node selects a cell matched with 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.

In the above scheme, the management state includes a connection state or an inactive state.

In the above scheme, 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 comprises 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 comprises a PDCP layer, an RLC layer and an MAC layer;

wherein, the protocol stack of one layer comprises partial functions of at least one layer of SDAP layer, PDCP layer, RLC layer and MAC layer.

In the above scheme, the management state includes a two-layer protocol stack or a one-layer protocol stack for controlling layer management;

wherein, the two-layer protocol stack comprises a Non-Access Stratum (NAS) layer and a Radio Resource Control (RRC) layer;

wherein the one-layer protocol stack comprises partial functionality of the NAS and/or RRC layer.

In the foregoing solution, the state attribute of the terminal includes at least one of the following characteristics:

a service type;

the buffering length of the service data;

quality of Service (QoS) and/or Quality of Experience (QoE) of the traffic;

the speed and/or direction of movement and/or trajectory of movement of the traffic.

In the above scheme, the state attribute of the terminal includes a packet characteristic of the terminal; the packet characteristics comprise a first packet characteristic and/or a second packet characteristic; the length of the data packet meeting the second data packet characteristic is larger than that of the data packet meeting the first data packet characteristic;

the network node selects a cell matched with the state attribute of the terminal for the terminal, and the method comprises the following steps:

under the condition that the state attribute of the terminal is the first data packet characteristic, the network node selects a unique cell with an inactive state, which is matched with the first data packet characteristic of the terminal, for the terminal;

and under the condition that the state attribute of the terminal is the second data packet characteristic, the network node selects the only cell with the connection state, which is matched with the second data packet characteristic of the terminal, for the terminal.

In the above solution, the state attribute of the terminal includes a service attribute of the terminal;

and the network node selects a cell for the terminal, and the unique service attribute of the cell is matched with the service attribute of the terminal.

In the foregoing solution, when the network node is the terminal, the selecting, by the network node, a cell matched with a state attribute of the terminal for the terminal includes:

and the terminal determines the service attribute and/or the management state of each cell based on the identifier of each cell, and selects the cell matched with the state attribute of the terminal based on the service attribute and/or the management state of each cell.

In the foregoing solution, before the terminal determines the service attribute and/or the management state of each cell based on the identifier of each cell, the method further includes:

the terminal receives a first system message sent by a base station, wherein the first system message comprises at least one of the following information:

at least one of an identity of one or more cells, a service attribute of a cell, a mapping relation of management states;

management state information supported by the local cell and/or the adjacent cell;

a cell list in the adjacent cell, which has the same management state information supported by the cell;

a cell list corresponding to different management state types supported by the adjacent cell;

the state attribute of the terminal supported by the local cell and/or the adjacent cell.

In the above scheme, the method further comprises: and under the condition that the state attribute of the terminal is changed, the network node reselects a cell matched with the changed state attribute of the terminal for the terminal.

In the foregoing solution, when the network node is a base station, the reselecting, by the network node, a cell matched with the changed state attribute of the terminal for the terminal includes:

the base station receives a message sent by the terminal, wherein the message at least comprises the updated state attribute of the terminal;

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

In the above scheme, the method further comprises: and the base station sends the relevant information of the cell to the terminal.

In a second aspect, an embodiment of the present invention further provides a network access method, where the method includes:

a base station receives a first message sent by a terminal, wherein the first message is used for requesting to establish connection;

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

and the base station sends a second message for responding to the first message to the terminal.

In the above scheme, the first message further includes a message content for random access, where the message content is a first message content in two-step random access.

In the above scheme, the method further comprises: the base station sends a first system message to the terminal, wherein the first system message comprises at least one of the following information:

In the above scheme, the method further comprises: and the base station sends a second system message to the terminal, wherein the second system message comprises indication information which is used for indicating that a random access process is not required to be executed.

In the above scheme, the content included in the first message includes all or part of information of an AS and an NAS for connection establishment;

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

the terminal identification, the terminal capability information, the network slice identification, the data network node address, the service attribute information, and the reason value corresponding to the message.

In the above solution, the establishing a connection with a data network node based on the content includes:

the base station acquires the information of the terminal according to the identifier of the terminal, wherein the information of the terminal at least comprises subscription information;

determining QoS (quality of service) information corresponding to the terminal according to the information of the terminal, determining wireless parameter configuration information according to the QoS information, and establishing connection with a data network node based on the wireless parameter configuration information and the address of the data network node;

wherein the radio parameter configuration information comprises at least one of the following information: header compression parameters, security encryption parameters, retransmission parameters.

In the foregoing solution, the second message includes at least one of the following information: the wireless resource configuration information of the terminal used for data transmission in the cell, the identification of the terminal in the cell and the address information of the terminal and the data network node communication.

In the above scheme, the base station performs data processing by using a layer of user plane protocol layer, where the layer of user plane protocol layer includes at least one of the following functions: header compression, security encryption, scheduling, multiplexing and concatenation, semi-static resource allocation, protocol error detection and retransmission.

In a third aspect, an embodiment of the present invention further provides a network access method, where the method includes:

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

receiving a second message in response to the first message.

In the above scheme, the method further comprises: the terminal receives a first system message sent by the base station, wherein the first system message comprises at least one of the following information:

In the above scheme, the method further comprises: and the terminal receives a second system message sent by the base station, wherein the second system message comprises indication information, and the indication information is used for indicating that a random access process does not need to be executed.

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

In a fourth aspect, an embodiment of the present invention further provides a network node, where the network node includes a selecting unit, configured to select, for a terminal, a cell 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.

the four-layer protocol stack comprises an SDAP layer, a PDCP layer, an RLC layer and an MAC layer;

wherein, the protocol stack of one layer comprises partial functions of at least one layer of SDAP, PDCP layer, RLC layer and MAC layer.

wherein the two-layer protocol stack comprises a NAS layer and an RRC layer;

a service type;

the buffering length of the service data;

qos and/or QoE of the service;

the selecting unit is configured to, when the state attribute of the terminal is the first packet characteristic, select, by the network node, a unique cell having an inactive state for the terminal, where the cell matches the first packet characteristic of the terminal; and under the condition that the state attribute of the terminal is the second data packet characteristic, the network node selects the only cell with the connection state, which is matched with the second data packet characteristic of the terminal, for the terminal.

the selection unit is used for selecting a cell for the terminal, and the unique service attribute of the cell is matched with the service attribute of the terminal.

In the foregoing solution, the selecting unit is configured to, when the network node is the terminal, determine a service attribute and/or a management state of each cell based on an identifier of each cell, and select a cell matching the state attribute of the terminal based on the service attribute and/or the management state of each cell.

In the foregoing solution, the network node further includes a first receiving unit, configured to receive a first system message sent by a base station before the selecting unit determines the service attribute and/or the management state of each cell based on an identifier of each cell, where the first system message includes at least one of the following information:

In the foregoing solution, the selecting unit is further configured to, when the state attribute of the terminal is changed, reselect, by the network node, a cell that matches the changed state attribute of the terminal for the terminal.

In the foregoing solution, the network node further includes a second receiving unit, configured to receive, when the network node is a base station, a message sent by the terminal, where the message at least includes a state attribute updated by the terminal;

and the selecting unit is used for determining the service attribute and/or the management state of each cell based on the identifier of each cell and selecting the cell matched with the updated state attribute of the terminal based on the service attribute and/or the management state of each cell.

In the foregoing solution, 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 invention 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 a terminal, where the first message is used to request to establish a connection;

the first processing unit is used for analyzing the first message, obtaining the content contained in the first message and establishing connection with the data network node based on the content;

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

In the foregoing solution, 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:

In the foregoing solution, the second sending unit 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 that a random access procedure is not required to be executed.

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

In the above solution, the first processing unit is configured to obtain information of the terminal according to an identifier of the terminal, where the information of the terminal at least includes subscription information; determining QoS information corresponding to the terminal according to the information of the terminal, determining wireless parameter configuration information according to the QoS information, and establishing connection with a data network node based on the wireless parameter configuration information and the address of the data network node; wherein the radio parameter configuration information comprises at least one of the following information: header compression parameters, security encryption parameters, retransmission parameters.

In a sixth aspect, an embodiment of the present invention further provides a terminal, where the terminal includes: a third transmitting 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 establishing connection between the base station and a data network node;

the fourth receiving unit is configured to receive a second message in response to the first message.

In the foregoing solution, 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:

In the foregoing solution, 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, and the indication information is used to indicate that a random access procedure is not required to be executed.

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the network selection method according to the first aspect of the embodiment of the present invention; alternatively, the program is executed by a processor to implement the steps of the network access method according to the second aspect or the third aspect of the embodiments of the present invention.

In an eighth aspect, an embodiment of the present invention further provides a network node, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the network selection method according to the first aspect of the embodiment of the present invention.

In a ninth aspect, an embodiment of the present invention further provides a base station, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the network access method according to the second aspect of the embodiment of the present invention.

In a tenth aspect, an embodiment of the present invention further provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the network access method according to the third aspect of the embodiment of the present invention.

The embodiment of the invention provides a network selection method, a network access method and related node equipment, wherein the method comprises the following steps: the network node selects a cell matched with 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. By adopting the technical scheme of the embodiment of the invention, through the extremely simple network design, the service attribute or the management state of the cell is single, so that the structure and the processing device of the network side equipment are relatively simple, the function is greatly simplified compared with the traditional network side equipment, and the data processing time delay is greatly shortened.

Drawings

Fig. 1 is a first flowchart illustrating a network selection method according to an embodiment of the present invention;

fig. 2 is a first flowchart illustrating a network access method according to an embodiment of the present invention;

FIG. 3 is a diagram of a layer of user plane protocol layers according to an embodiment of the present invention;

fig. 4 is an interaction flow diagram of a network access method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a network node according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network node according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a network node according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a hardware component structure of a communication device according to an embodiment of the present invention.

Detailed Description

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

The embodiment of the invention provides a network selection method. Fig. 1 is a first flowchart illustrating a network selection method according to an embodiment of the present invention; as shown in fig. 1, the method includes:

step 101: the network node selects a cell matched with 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.

In some optional embodiments of the invention, the status attribute of the terminal comprises a packet characteristic of the terminal; the packet characteristics comprise a first packet characteristic and/or a second packet characteristic; the length of the data packet (i.e. the size of the data packet) satisfying the second data packet characteristic is larger than the length of the data packet satisfying the first data packet characteristic; the network node selects a cell matched with the state attribute of the terminal for the terminal, and the method comprises the following steps: under the condition that the state attribute of the terminal is the first data packet characteristic, the network node selects a unique cell with an inactive state, which is matched with the first data packet characteristic of the terminal, for the terminal; and under the condition that the state attribute of the terminal is the second data packet characteristic, the network node selects the only cell with the connection state, which is matched with the second data packet characteristic of the terminal, for the terminal.

In this embodiment, the data packet characteristics of the terminal may include large packet transmission or small packet transmission. The 'big packet' in the big packet transmission or the 'small packet' in the small packet transmission is related to the data volume of the data to be transmitted, and if the data volume meets a certain condition, the data volume can be determined to be the 'big packet'; accordingly, if the data does not satisfy the condition, or the data satisfies another condition, it may be determined as a "packet". Illustratively, the large packet transmission or the small packet transmission is related to a service type; if the service type meets a certain service type range, the large packet transmission can be determined; correspondingly, if the service type does not meet the service type range or the service type meets another service type range, the packet transmission can be determined.

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 packet transmission or packet transmission. It is understood that the single service attribute or the single management state of the selected cell can adapt to and provide services for the state attribute of the terminal.

In this embodiment, the management state includes a connection state or an inactive state. Illustratively, if the state attribute of the terminal is 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 is to be understood that, in an embodiment, the terminal may have two status attributes of large packet transmission and small packet transmission, and the network node may select a cell corresponding to the current status attribute for the terminal based on the current status attribute of the terminal, respectively. It can be understood that if the terminal switches from the state attribute of the large packet transmission to the state attribute of the 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 status attribute, e.g. the terminal has only status attributes for large or small packet transmissions, and the network node may select a matching cell for the terminal based on the terminal's only status attribute.

In some optional embodiments of the invention, the state attribute of the terminal comprises a service attribute of the terminal; the network node selects a cell matched with the state attribute of the terminal for the terminal, and the method comprises the following steps: and the network node selects a cell for the terminal, and the unique service attribute of the cell is matched with the service attribute of the terminal.

In this embodiment, the service attribute of the terminal may include a service type, and the selected cell service attribute is single, and is capable of adapting to and providing a service for the service attribute of the terminal.

In some optional embodiments of the present invention, in a case that the network node is the terminal, the selecting, by the network node, a cell for the terminal, where the cell matches a state attribute of the terminal, includes: and the terminal determines the service attribute and/or the management state of each cell based on the identifier of each cell, and selects the cell matched with the state attribute of the terminal based on the service attribute and/or the management state of each cell.

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

In this embodiment, the at least one information may be identified in the first system message by a reserved field. For example, taking the first system message including the identities of one or more cells as an example, the terminal may directly identify the service attribute of the cell corresponding to the cell identity according to the cell Identity (ID).

The system message in this embodiment is also more concise than the design of the conventional system message, and only the system message related to the function of this cell needs to be provided. In the case of a dedicated cell, for example, a cell of a certain factory floor, a factory floor customized area number (or identifier) is used to replace a Public Land Mobile Network (PLMN) of a conventional Network or a slice number (or identifier) is used to replace a PLMN of a conventional Network.

In some optional embodiments, the method further comprises: and under the condition that the state attribute of the terminal is changed, the network node reselects a cell matched with the changed state attribute of the terminal for the terminal.

In some optional embodiments of the present invention, in a case that the network node is a base station, the reselecting, by the network node, a cell for the terminal, where the cell matches the changed state attribute of the terminal, includes: the base station receives a message sent by the terminal, wherein the message at least comprises the updated state attribute of the terminal; and the base station determines the service attribute and/or the management state of each cell based on the identifier of each cell, and selects a cell matched with the updated state attribute of the terminal based on the service attribute and/or the management state of each cell.

In some optional embodiments of the invention, the method further comprises: and the base station sends the relevant information of the cell to the terminal.

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

In some optional embodiments of the invention, the management state comprises controlling a layer two protocol stack or a layer one protocol stack for layer management;

wherein the two-layer protocol stack comprises NAS and RRC layers;

In some optional embodiments of the invention, the state attribute of the terminal comprises at least one of the following characteristics:

a service type;

the buffering length of the service data;

QoS and/or QoE of the traffic;

In some optional embodiments, the network node may also determine a classification of the terminal based on the status attribute of the terminal, and select a matching cell based on the classification of the terminal. Illustratively, for different applications, different multidimensional feature combinations can be selected to classify the terminal. For example, user transmission priority may be ordered by traffic type and buffer length of traffic data; allocating a proper cell access and camping strategy to the terminal according to the service type and the moving speed of the service (such as the moving speed of the terminal); still alternatively, the motion may be based on characteristics such as trajectory pattern, speed of movement, and direction of motion.

Based on the foregoing embodiments, the embodiment of the present invention further provides a network access method. Fig. 2 is a first flowchart illustrating a network access method according to an embodiment of the present invention; as shown in fig. 2, the method includes:

step 201: a base station receives a first message sent by a terminal, wherein the first message is used for requesting to establish connection;

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

step 203: and 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: a terminal sends a first message for requesting to establish connection to a base station; the content contained in the first message is used for establishing connection between the base station and a data network node; receiving a second message in response to the first message.

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

In some optional embodiments of the invention, the method further comprises: the base station sends a first system message to the terminal, wherein the first system message comprises at least one of the following information:

Correspondingly, the terminal receives the first system message.

In some optional embodiments of the invention, the method further comprises: and the base station sends a second system message to the terminal, wherein the second system message comprises indication information which is used for indicating that a random access process is not required to be executed. Correspondingly, the terminal receives the second system message.

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

wherein, the NAS type information adopts explicit definition to replace the definition of eight-bit STRING (OCTET STRING);

or: the NAS class information includes at least one of:

In this embodiment, the first message (i.e. the connection establishment request message) is not divided into two layers, RRC and NAS.

In some optional embodiments of the invention, the establishing a connection with a data network node based on the content comprises: the base station acquires the information of the terminal according to the identifier of the terminal, wherein the information of the terminal at least comprises subscription information; determining QoS information corresponding to the terminal according to the information of the terminal, determining wireless parameter configuration information according to the QoS information, and establishing connection with a data network node based on the wireless parameter configuration information and the address of the data network node; wherein the radio parameter configuration information comprises at least one of the following information: header compression parameters, security encryption parameters, retransmission parameters.

In some optional embodiments of the invention, the second message comprises at least one of the following information: the wireless resource configuration information of the terminal used for data transmission in the cell, the identification of the terminal in the cell and the address information of the terminal and the data network node communication.

In some optional embodiments of the present invention, the base station performs data processing by using a layer of user plane protocol layer, where the layer of user plane protocol layer includes at least one of the following functions: header compression, security encryption, scheduling, multiplexing and concatenation, semi-static resource allocation, protocol error detection and retransmission.

For example, as shown with reference to FIG. 3, a layer of user plane protocol layers may include: a packet Header Compression (ROHO) function, a Security (Security) function, a Hybrid Automatic Repeat reQuest (HARQ) function, a Scheduling/priority handling (priority handling) function, and the like.

In this embodiment, because the service of the cell is single, it is not necessary to use a Data Radio Bearer (DRB) to distinguish different service characteristics, at most, different destination addresses; therefore, service priority scheduling does not exist, such as parameters like policy routing (PBR) and application of corresponding functions; the scheduling of logical channels only needs to consider the arrival time, or the number of retransmissions, as a scheduling consideration.

By adopting the technical scheme of the embodiment of the invention, on one hand, through the extremely simple network design, the service attribute or the management state of the cell is single, so that the structure and the processing device of the network side equipment are relatively simple, the function is greatly simplified compared with the traditional network side equipment, and the data processing time delay is greatly shortened. On the other hand, because the function of the network side device is simplified, the embodiment of the present invention may also simplify the four-layer protocol layer to one-layer protocol layer by optimizing the protocol architecture, specifically, by combining the protocol architecture of the user plane, and on the other hand, may also greatly shorten the data processing delay. In another aspect, the present application may be based on the cells of the user group with the same service features, or even based on the processing of the data of the cells of the users, and the terminal may directly identify the service attribute of the cell according to the cell identifier, and so on.

The cell selection method according to the embodiment of the present invention is described below with reference to a specific example. FIG. 4 is a schematic interaction flow diagram of a network selection method according to an embodiment of the present invention; in this example, a network node is taken as an example for explanation. As shown in fig. 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 having a unique service attribute, and/or the cell having a unique management state.

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

Optionally, the first message further includes a message for random access, where the message is a first message in two steps of random access. In this embodiment, for the random access procedure, if the two-step random access technique is adopted, the first message for requesting to establish the connection may be merged with the first message in the two-step random access procedure.

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

In this embodiment, the first message is no longer divided into two layers, namely, RRC and NAS, and the base station may analyze all contents of the first message, which may include: the identity of the terminal, the capabilities of the terminal, the slice identity, the nature of the service, the address of the DN, the reason for the origination, etc.

Step 304: the base station sends a second message for responding to the first message to the terminal; the second message may include an identifier of a cell in which the terminal is located, radio resource configuration information used by the terminal for data transmission in the cell, and address information of communication between the terminal and the data network node.

The embodiment of the invention also provides a network node. Fig. 5 is a schematic structural diagram of a network node according to an embodiment of the present invention; as shown in fig. 5, the network node comprises a selecting unit 31 configured to select a cell for a terminal, where the cell 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.

In some optional embodiments of the invention, the management state comprises a connected state or an inactivated state.

wherein the two-layer protocol stack comprises a NAS layer and an RRC layer;

a service type;

the buffering length of the service data;

QoS and/or QoE of the traffic;

In some optional embodiments of the invention, the status attribute of the terminal comprises a packet characteristic of the terminal; the packet characteristics comprise a first packet characteristic and/or a second packet characteristic; the length of the data packet meeting the second data packet characteristic is larger than that of the data packet meeting the first data packet characteristic;

the selecting unit 31 is configured to, in a case that the state attribute of the terminal is the first packet characteristic, select, by the network node, a unique cell having an inactive state for the terminal, where the cell matches the first packet characteristic of the terminal; and under the condition that the state attribute of the terminal is the second data packet characteristic, the network node selects the only cell with the connection state, which is matched with the second data packet characteristic of the terminal, for the terminal.

In some optional embodiments of the invention, the state attribute of the terminal comprises a service attribute of the terminal; the selecting unit 31 is configured to select a cell for the terminal, where the unique service attribute of the cell matches with the service attribute of the terminal.

In some optional embodiments of the present invention, the selecting unit 31 is configured to, if the network node is the terminal, determine a service attribute and/or a management status of each cell based on the identifier of each cell, and select a cell matching the status attribute of the terminal based on the service attribute and/or the management status of each cell.

In some optional embodiments of the present invention, as shown in fig. 6, the network node further includes a first receiving unit 33, configured to receive a first system message sent by the base station before the selecting unit 31 determines the service attribute and/or the management status of each cell based on the identifier of each cell, where the first system message includes at least one of the following information:

In some optional embodiments of the present invention, the selecting unit 31 is further configured to, in a case that the state attribute of the terminal is changed, reselect, by the network node, a cell, for the terminal, that matches the changed state attribute of the terminal.

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

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

In some optional embodiments of the present invention, the network node further comprises a first sending unit 32, configured to send the information about the cell to the terminal.

In the embodiment of the present invention, the selecting Unit 31 in the network node may be implemented by a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a Micro Control Unit (MCU), or a Programmable Gate Array (FPGA) in the network node in practical application; the first receiving unit 33, the second receiving unit 34 and the first sending unit 32 in the network node can be implemented by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface and a protocol, etc.) and a transceiving antenna in practical application.

It should be noted that: in the network node provided in the above embodiment, when performing network selection, only the division of the program modules is described as an example, and in practical applications, the processing distribution may be completed by different program modules according to needs, that is, 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 node provided by the above embodiment and the network selection method embodiment belong to the same concept, and the specific implementation process thereof is described in the method embodiment and is not described herein again.

The embodiment of the invention also provides a base station. Fig. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention; as shown in fig. 8, the base station includes a third receiving unit 41, a first processing unit 42, and a second transmitting unit 43; wherein,

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

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

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

In some optional embodiments of the present invention, 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:

In some optional embodiments of the present invention, 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 that a random access procedure does not need to be performed.

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

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

In the embodiment of the present invention, the first processing unit 42 in the base station may be implemented by a CPU, a DSP, an MCU, or an FPGA in the base station in practical application; the third receiving unit 41 and the second sending unit 43 in the base station can be implemented by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface, a protocol, and the like) and a transceiving antenna in practical application.

It should be noted that: in the foregoing embodiment, when the base station performs network access, only the division of the program modules is described as an example, and in practical applications, the processing allocation may be completed by different program modules according to needs, that is, 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 provided by the above embodiments belong to the same concept, and the specific implementation process thereof is described in the method embodiments, which is not described herein again.

The embodiment of the invention also provides the terminal. Fig. 9 is a schematic structural diagram of a terminal according to an embodiment of the present invention; as shown in fig. 9, the terminal includes: a third transmitting 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 a base station; the content contained in the first message is used for establishing connection between the base station and a data network node;

the fourth receiving unit 52 is configured to receive a second message in response to the first message.

In some optional embodiments of the present invention, 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:

In some optional embodiments of the present invention, 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 to indicate that a random access procedure does not need to be performed.

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

In the embodiment of the present invention, the third sending unit 51 and the fourth receiving unit 52 in the terminal can be implemented by a communication module (including a basic communication suite, an operating system, a communication module, a standardized interface, a protocol, etc.) and a transceiving antenna in practical application.

It should be noted that: in the terminal provided in the foregoing embodiment, when performing network access, only the division of each program module is described as an example, and in practical applications, the above processing distribution may be completed by different program modules according to needs, that is, the internal structure of the terminal is divided into different program modules to complete all or part of the above-described processing. In addition, the terminal provided by the above embodiment and the network access method embodiment belong to the same concept, and the specific implementation process thereof is described in the method embodiment, which is not described herein again.

The embodiment of the invention also provides a communication device, which can be a network node, a base station or a terminal in the foregoing embodiments. Fig. 10 is a schematic diagram of a hardware component structure of a communication device according to an embodiment of the present invention; as shown in fig. 10, the communication device includes a memory 62, a processor 61 and a computer program stored on the memory 62 and executable on the processor 61, and the processor 61 executes the program to implement the steps of the network selection method applied in the network node or the base station according to the embodiment of the present invention.

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 enable communications among the components. The bus system 64 includes a power bus, a control bus, and a status signal bus in addition to the data bus. For clarity of illustration, however, the various buses are labeled as bus system 64 in fig. 10.

It will be appreciated that the memory 62 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical disk, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and 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 (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), Synchronous Dynamic Random Access Memory (SLDRAM), Direct Memory (DRmb Access), and Random Access Memory (DRAM). The memory 62 described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The method disclosed in the above embodiments of the present invention may be applied to the processor 61, or implemented by the processor 61. The processor 61 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 61. The processor 61 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 61 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 62, and the processor 61 reads the information in the memory 62 and performs the steps of the aforementioned method in conjunction with its hardware.

In an exemplary embodiment, the communication Device may be implemented by one or more Application Specific Integrated Circuits (ASICs), DSPs, Programmable Logic Devices (PLDs), Complex Programmable Logic Devices (CPLDs), FPGAs, general purpose processors, controllers, MCUs, microprocessors (microprocessors), or other electronic components for performing the aforementioned methods.

In an exemplary embodiment, the present invention further provides a computer readable storage medium, such as a memory 62 comprising a computer program, which is executable by a processor 61 of a communication device to perform the steps of the aforementioned 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; or may be various devices including one or any combination of the above memories.

Embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the network selection method applied in a network node or a base station according to embodiments of the present invention.

The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.

Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.

The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

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

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method of network selection, the method comprising:

2. The method of claim 1, wherein the management state comprises a connected state or an inactive state.

3. The method of 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 two management;

the four-layer protocol stack comprises 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;

4. The method of claim 1, wherein the management state comprises controlling a layer management two-layer protocol stack or a layer protocol stack;

the two-layer protocol stack comprises a non-access stratum (NAS) and a Radio Resource Control (RRC) layer;

5. The method according to claim 1, wherein the state attribute of the terminal comprises at least one of the following characteristics:

a service type;

the buffering length of the service data;

quality of service, QoS, and/or quality of experience, QoE, of the service;

6. The method of claim 2, wherein the state attribute of the terminal comprises a packet characteristic of the terminal; the packet characteristics comprise a first packet characteristic and/or a second packet characteristic; the length of the data packet meeting the second data packet characteristic is larger than that of the data packet meeting the first data packet characteristic;

7. The method of claim 1, wherein the state attribute of the terminal comprises a service attribute of the terminal;

8. The method according to claim 1, wherein in the case that the network node is the terminal, the network node selects a cell for the terminal that matches the state attribute of the terminal, including:

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

10. The method of claim 1, further comprising:

and under the condition that the state attribute of the terminal is changed, the network node reselects a cell matched with the changed state attribute of the terminal for the terminal.

11. The method according to claim 10, wherein in a case that the network node is a base station, the network node reselects a cell for the terminal, where the cell matches the changed state attribute of the terminal, and the method includes:

12. The method of claim 11, further comprising: and the base station sends the relevant information of the cell to the terminal.

13. A method for network access, the method comprising:

14. The method of claim 13, wherein the first message further comprises a message content for random access, and wherein the message content is a first message content in two-step random access.

15. The method of claim 13, further comprising:

the base station sends a first system message to the terminal, wherein the first system message comprises at least one of the following information:

16. The method of claim 13, further comprising:

and the base station sends a second system message to the terminal, wherein the second system message comprises indication information which is used for indicating that a random access process is not required to be executed.

17. The method of claim 13, wherein the first message includes content including all or part of AS and NAS information for connection establishment;

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

18. The method of claim 17, wherein establishing a connection with a data network node based on the content comprises:

19. The method of claim 13, wherein the second message includes at least one of the following information: the wireless resource configuration information of the terminal used for data transmission in the cell, the identification of the terminal in the cell and the address information of the terminal and the data network node communication.

20. The method according to any of claims 13 to 19, wherein the base station performs data processing using a layer of user plane protocol layer, wherein the layer of user plane protocol layer comprises at least one of the following functions: header compression, security encryption, scheduling, multiplexing and concatenation, semi-static resource allocation, protocol error detection and retransmission.

21. A method for network access, the method comprising:

receiving a second message in response to the first message.

22. The method of claim 21, wherein the first message further comprises a message content for random access, and wherein the message content is a first message content in two-step random access.

23. The method of claim 21, further comprising:

the terminal receives a first system message sent by the base station, wherein the first system message comprises at least one of the following information:

24. The method of claim 21, further comprising:

and the terminal receives a second system message sent by the base station, wherein the second system message comprises indication information, and the indication information is used for indicating that a random access process does not need to be executed.

25. The method of claim 21, wherein the first message includes content including all or part of AS and NAS information for connection establishment;

wherein, the NAS type information adopts explicit definition;

or: the NAS class information includes at least one of:

26. The method of claim 21, wherein the second message comprises at least one of the following information: the wireless resource configuration information of the terminal used for data transmission in the cell, the identification of the terminal in the cell and the address information of the terminal and the data network node communication.

27. A network node, characterized in that the network node comprises a selection unit configured to select a cell for a terminal, which cell 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.

28. A base station, characterized in that the base station comprises a third receiving unit, a first processing unit and a second transmitting unit; wherein,

29. A terminal, characterized in that the terminal comprises: a third transmitting unit and a fourth receiving unit; wherein,

30. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 12; or the program, when executed by a processor, implements the steps of the method of any one of claims 13 to 20; alternatively, the program when executed by a processor implements the steps of the method of any of claims 21 to 26.

31. A network node comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 1 to 12 are implemented when the processor executes the program.

32. A base station comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method according to any of claims 13 to 20 are implemented when the processor executes the program.

33. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of the method of any of claims 21 to 26.