CN114339959A

CN114339959A - 5G base station slice matching method

Info

Publication number: CN114339959A
Application number: CN202111655220.4A
Authority: CN
Inventors: 张淼; 逯利军; 钱培专; 许闱帏
Original assignee: Beijing Certusnet Information Technology Co ltd; Shanghai Certusnet Inc; CERTUSNET CORP
Current assignee: Beijing Certusnet Information Technology Co ltd; Shanghai Certusnet Inc; CERTUSNET CORP
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-12

Abstract

The invention discloses a 5G base station slice matching method which is based on the slice supporting capability of a terminal and a core network, correctly matches the front-end slice requirement with the back-end slice supporting capability, and successfully completes the end-to-end communication and realization of slices. The G base station slice matching method comprises the following steps: (10) maintaining a corresponding relation list: when the 5G base station is started, receiving a supporting slice S-NSSAI list sent by at least one core network AMF connected with the base station, and generating an overall corresponding list and a routing list supporting the corresponding relation between the slice S-NSSAI and the AMF; (20) and sending a demand slice list: when the UE accesses the network, the UE sends a required slice S-NSSAI list to the 5G base station; (30) slice matching: and the 5G base station selects the matched core network AMF according to the TempID or the required slice S-NSSAI list of the UE.

Description

5G base station slice matching method

Technical Field

The invention belongs to the technical field of 5G communication, and particularly relates to a slice matching method for a 5G base station based on slice supporting capability of a terminal and a core network.

Background

In the 5G era, the requirements of different services on networks are increasingly diversified. In order to adapt to the requirements of different services, the concept of supporting end-to-end slicing is proposed in 5G networks. The end-to-end network slice can provide differentiated virtual networks in the aspects of time delay, safety, mobility, transmission rate and the like under different application scenes, and from another point of view, the network slice technology can virtualize hardware resources of the network, and then recombine the virtualized network resources as required based on different service requirements to form a plurality of logic networks which are isolated from each other, so as to provide efficient network services for different service scenes. According to the current industry's consensus on network slices, network slices have the characteristics of virtualization, customization on demand, end-to-end, and isolation. .

An "end-to-end" network slice as a whole relates to the UE, the access network, the transport network, the core network. An Access Network (RAN) side needs to be connected with a transmission Network and a core Network, and an end-to-end link is opened, so that normal operation of a service can be guaranteed. For the realization of supporting slice-related functions on the RAN side, three major functional points are important:

1. identification of the gbb for network slice identity;

2. based on the slice supporting capability of the terminal UE and the core network 5GC, the 5G base station gNB performs a slice matching method to select an AMF (access and Mobility Management function);

3. and the gNB (gNodeB) performs corresponding resource isolation, exclusive sharing, static sharing, dynamic sharing and the like according to different slices.

After the gNB identifies the network slice ID, it needs to make a selection and a routing of matching a required slice and a supported slice according to a service slice requirement reported by a terminal ue (user equipment) and a slice type supported by a corresponding AMF in a core network 5 GC.

However, the prior art lacks a mature 5G base station slice matching method, so that the front-end slice requirement is not matched with the rear-end supporting slice capability, and end-to-end cut-through and implementation of slices cannot be completed.

Disclosure of Invention

The invention aims to provide a 5G base station slice matching method which is based on the slice supporting capability of a terminal and a core network, correctly matches the slice requirement of a front end and the slice supporting capability of a rear end, and successfully completes the end-to-end communication and realization of slices.

The technical solution for realizing the purpose of the invention is as follows:

a slice matching method for a 5G base station comprises the following steps:

(10) maintaining a corresponding relation list: when the 5G base station is started, receiving a supporting slice S-NSSAI list sent by at least one core network AMF connected with the base station, and generating an overall corresponding list and a routing list supporting the corresponding relation between the slice S-NSSAI and the AMF;

(20) and sending a demand slice list: when the UE accesses the network, the UE sends a required slice S-NSSAI list to the 5G base station;

(30) slice matching: and the 5G base station selects the matched core network AMF according to the TempID or the required slice S-NSSAI list of the UE.

Compared with the prior art, the invention has the following remarkable advantages:

based on the slicing support capability of the terminal and the core network, the slicing requirement of the front end and the slicing support capability of the rear end are correctly matched, and the end-to-end communication and the realization of the slicing are smoothly completed. Supporting multi-slice S-NSSAI, multi-AMF scenes; the default AMF strategy covers scenes which do not support slice S-NSSAI, including scenes which are not supported by UE and scenes which are not supported by AMF, and robustness is improved.

The invention is described in further detail below with reference to the figures and the detailed description.

Drawings

Fig. 1 is a main flow chart of the 5G base station slice matching method of the present invention.

Fig. 2 is a flowchart of the slice matching step of fig. 1.

Fig. 3 is a schematic diagram of the 5G base station slice matching method of the present invention.

Detailed Description

As shown in fig. 1, the slice matching method for the 5G base station of the present invention includes the following steps:

for example, the gNB receives the slice-supporting S-NSSAI list from the core network AMF 1# through the NG interface at startup;

the gNB receives an S-NSSAI list of the support slices from the core network AMF 2# through an NG interface when starting;

the gNB receives an S-NSSAI list of the support slices from the core network AMF n # through an NG interface when starting;

AMF n # indicates that the gNB is connected with n AMFs in actual deployment, and n is not less than 1.

S-NSSAI is Single Network Slice Selection Assistant Information, Single Network Slice Selection help Information.

when the UE accesses the network, a registration request is initiated, and the gNB identifies and receives a required slice Requested S-NSSAI carried in an RRC setup complete message in the UE RRC chain establishment flow.

As shown in fig. 2, the (30) slice matching step includes:

(31) UE Temp ID extraction: the 5G base station extracts the UE Temp ID and judges whether the extraction is successful, if so, the step is switched to (32) the step of matching the slice according to the UE Temp ID, and if not, the step is switched to (33) the step of judging the intersection of the lists;

(32) slice matching by UE Temp ID: the UE Temp ID is successfully extracted, and the corresponding AMF is selected and NAS routed according to the UE Temp ID, and the slice matching is finished;

(33) and (4) judging the intersection of the lists: the Temp ID of the UE is unsuccessfully extracted, and the 5G base station judges whether an intersection exists between the S-NSSAI list of the UE requirement slice and an overall corresponding list supporting the corresponding relation between the S-NSSAI and the AMF; if yes, turning to (34) a slicing step matched according to the required list, and if not, turning to (35) a slicing step matched according to a default strategy;

(34) list matching slices on demand: if the required slice S-NSSAI list and the total corresponding list supporting the corresponding relation between the slice S-NSSAI and the AMF have intersection, selecting and NAS routing to the corresponding AMF according to the corresponding relation between the supporting slice S-NSSAI and the AMF, and finishing slice matching;

(35) matching slices according to a default strategy: and selecting and NAS routing to the corresponding default AMF according to a default AMF strategy preset by the gNB.

For a first registered UE, the UE may provide S-NSSAI for the gNB to select the AMF. If the UE does not provide S-NSSAI or the gNB cannot select AMF according to S-NSSAI, the gNB selects default AMF

Therefore, the gNB selects the core network AMF matched with the TempID or the requirement slice S-NSSAI list of the UE according to the following four conditions

Selecting AMF based on Temp ID; temp ID is absent, AMF is selected based on S-NSSAI;

both Temp ID and S-NSSAI are present, AMF is selected based on Temp ID;

d. in the absence of Temp ID and S-NSSAI, gNB selects AMF according to a "default" policy.

Fig. 3 is a schematic diagram of the slice matching method of the 5G base station according to the present invention.

As shown, the gNB selects AMF based on either Tempid or S-NSSAI (Single Network Slice Selection Assistant information).

Claims

1. A slice matching method for a 5G base station is characterized by comprising the following steps:

2. The 5G base station slice matching method of claim 1, wherein the (30) slice matching step comprises: