CN111372253A

CN111372253A - Cell access method, device, system and computer readable storage medium

Info

Publication number: CN111372253A
Application number: CN201811587666.6A
Authority: CN
Inventors: 张光辉; 许森; 孙震强; 李俊杰; 霍晓莉
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2020-07-03
Anticipated expiration: 2038-12-25
Also published as: CN111372253B

Abstract

The disclosure provides a cell access method, a device, a system and a computer readable storage medium, and relates to the technical field of wireless communication. The cell access method comprises the following steps: the base station broadcasts the mapping relation between the Public Land Mobile Network (PLMN) of each operator and the access resource of the PLMN by using the carrier shared by each operator; the terminal utilizes the home public land mobile network HPLMN to inquire the mapping relation to obtain the access resource corresponding to the HPLMN; and the terminal initiates random access by using the access resource corresponding to the HPLMN. According to the method and the device, under the scene of the 5G shared network, the user terminals of different operators can preferentially select certain access resources to initiate random access according to the HPLMN, so that the user terminals of different operators can access the 5G shared network according to certain priority.

Description

Cell access method, device, system and computer readable storage medium

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to a cell access method, apparatus, system, and computer-readable storage medium.

Background

The mainstream scheme of the 5G shared network is that a plurality of operators share one physical base station, and the physical base station transmits data back to core networks independently built by each operator.

The shared network is divided according to a carrier sharing mode and can be divided into a shared carrier mode and an independent carrier mode. Wherein, sharing carrier means that all the frequencies of each operator are shared and used together; independent carriers refer to that although each operator shares base station equipment, only the own frequency of each operator can be used, i.e., the frequency is not shared.

Fig. 1 shows a schematic diagram of an operation scheme of a shared carrier. The operator A and the operator B share a wireless network and a carrier, and a bearer network and a core network are independently established. The user a of the operator A and the user B of the operator B access a wireless network through a shared carrier of the shared network, the wireless network distinguishes user data of different operators and then respectively transmits the user data back to respective core networks, the data of the user a is transmitted back to the core network of the operator A, and the data of the user B is transmitted back to the core network of the operator B.

Disclosure of Invention

The technical problem solved by the present disclosure is how to access, in a 5G shared network scenario, user terminals of different operators to a 5G shared network according to a certain priority.

According to an aspect of the embodiments of the present disclosure, a cell access method is provided, including: the base station broadcasts the mapping relation between the Public Land Mobile Network (PLMN) of each operator and the access resource of the PLMN by using the carrier shared by each operator; the terminal utilizes the home public land mobile network HPLMN to inquire the mapping relation to obtain the access resource corresponding to the HPLMN; and the terminal initiates random access by using the access resource corresponding to the HPLMN.

In some embodiments, the number of carriers is multiple, and the access resource of the PLMN is a frequency point corresponding to the PLMN; the terminal initiates random access by using the access resource corresponding to the HPLMN, and the method comprises the following steps: and the terminal initiates access at the frequency point corresponding to the HPLMN.

In some embodiments, the number of the frequency points corresponding to the PLMN is multiple, and each frequency point corresponding to the PLMN has a priority; the terminal initiates access at the frequency point corresponding to the HPLMN, and the access comprises the following steps: and the terminal selects the frequency point with the highest priority from the frequency points corresponding to the HPLMN to initiate access.

In some embodiments, the number of the carriers is single, and the access resource of the PLMN is a physical random access channel PRACH sequence corresponding to the PLMN; the terminal initiates random access by using the access resource corresponding to the HPLMN, and the method comprises the following steps: and the terminal initiates access by utilizing the PRACH sequence corresponding to the HPLMN.

In some embodiments, the number of PRACH sequences corresponding to the PLMN is plural; the method for initiating access by the terminal by using the PRACH sequence corresponding to the HPLMN comprises the following steps: and the terminal randomly selects one PRACH sequence from the plurality of PRACH sequences corresponding to the HPLMN and initiates access by utilizing the randomly selected PRACH sequence.

According to another aspect of the embodiments of the present disclosure, there is provided a cell access system, including: a base station configured to: broadcasting the mapping relation between the Public Land Mobile Network (PLMN) of each operator and the access resource of the PLMN by using the carrier wave shared by each operator; a terminal configured to: utilizing a Home Public Land Mobile Network (HPLMN) to query a mapping relation to obtain access resources corresponding to the HPLMN; and initiating random access by using the access resource corresponding to the HPLMN.

In some embodiments, the number of carriers is multiple, and the access resource of the PLMN is a frequency point corresponding to the PLMN; the terminal is configured to: and initiating access at a frequency point corresponding to the HPLMN.

In some embodiments, the number of the frequency points corresponding to the PLMN is multiple, and each frequency point corresponding to the PLMN has a priority; the terminal is configured to: and selecting the frequency point with the highest priority from the frequency points corresponding to the HPLMN to initiate access.

In some embodiments, the number of the carriers is single, and the access resource of the PLMN is a physical random access channel PRACH sequence corresponding to the PLMN; the terminal is configured to: and initiating access by using a PRACH sequence corresponding to the HPLMN.

In some embodiments, the number of PRACH sequences corresponding to the PLMN is plural; the terminal is configured to: randomly selecting one PRACH sequence from a plurality of PRACH sequences corresponding to the HPLMN, and initiating access by utilizing the randomly selected PRACH sequence.

According to another aspect of the disclosed embodiments, there is provided another cell access apparatus, including: a memory; and a processor coupled to the memory, the processor configured to perform the aforementioned cell access method based on instructions stored in the memory.

According to yet another aspect of the embodiments of the present disclosure, a computer-readable storage medium is provided, in which computer instructions are stored, and when executed by a processor, the instructions implement the aforementioned cell access method.

According to the method and the device, under the scene of the 5G shared network, the user terminals of different operators can preferentially select certain access resources to initiate random access according to the HPLMN, so that the user terminals of different operators can access the 5G shared network according to certain priority.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 shows a schematic diagram of an operation scheme of a shared carrier.

Fig. 2 illustrates a flow diagram of a cell access method of some embodiments of the present disclosure.

Fig. 3 shows a flowchart of an application example of the cell access method of the present disclosure.

Fig. 4 shows a schematic structural diagram of a cell access system according to some embodiments of the present disclosure.

Fig. 5 shows a schematic structural diagram of a cell access device according to some embodiments of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The inventor researches and discovers that the main technical scheme of the carrier sharing scheme has the following characteristics: (1) multiple operators share the same wireless network, so that network investment is saved; (2) a multi-party operator configures one or more carriers shared by multiple parties; (3) the shared carrier needs to broadcast the PLMNs (Public Land Mobile networks) of multiple operators at the same time; (4) the multi-party operators can only use the same cell-level characteristics, and part of the parameters can be configured according to the PLMN; (5) the terminal performs services under the same carrier, and an air interface resource allocation strategy needs to be considered. That is, the 5G sharing network in the related art has the following disadvantages: and only user terminals of different operators are supported to equally access the 5G shared network with the same priority, and priority-differentiated access is not supported.

For the 5G shared carrier scheme, although multiple operators already share the carrier, the operators still want user terminals of different operators to respectively embody access priorities of their respective operator networks in the shared network. Therefore, the invention provides a cell access method, which realizes that user terminals of different operators can preferentially select certain access resources to initiate random access according to the HPLMN, so that the user terminals of different operators can access a 5G shared network according to certain priority.

Some embodiments of the disclosed cell access method are first described in conjunction with fig. 2.

Fig. 2 illustrates a flow diagram of a cell access method of some embodiments of the present disclosure. As shown in fig. 2, the present embodiment includes steps S202 to S206.

In step S202, the base station broadcasts a mapping relationship between PLMNs of the respective operators and access resources of the PLMNs by using carriers shared by the respective operators.

The access resource of the PLMN may specifically include an access frequency point, a PRACH (Physical random access Channel) sequence, and the like.

In step S204, the terminal queries a mapping relationship between the PLMN of each operator and the Access resource of the PLMN by using a HPLMN (Home Physical Random Access Channel, Home public land mobile network), so as to obtain an Access resource corresponding to the HPLMN.

For example, the terminal uses the HPLMN to query the mapping relationship between the PLMNs of the respective operators and the access resources of the PLMNs, and finds the access resources of the PLMN corresponding to the PLMN that is the same as the HPLMN.

In step S206, the terminal initiates random access using the access resource corresponding to the HPLMN.

For example, the terminal may initiate random access using an access frequency point or a PRACH sequence corresponding to the HPLMN.

The above embodiments provide a cell access method. User terminals of different operators can preferentially select certain access resources to initiate random access according to the HPLMN, so that the user terminals of different operators can access the 5G shared network according to certain priority, and cell reselection and cell access based on PLMN priority are achieved.

Two cases in which the number of shared carriers is different are described below.

In one case, the number of carriers shared by each operator is plural. At this time, the access resource of the PLMN may be a frequency point corresponding to the PLMN. Correspondingly, in step S206, the terminal initiates access at the frequency point corresponding to the HPLMN.

For example, operator a has frequency point F1, operator B has frequency point F2, two operators share carrier networking, and both frequency points are shared for both users to use. And after receiving the broadcast message, the UE selects a frequency point corresponding to the self-attributive HPLMN according to the PLMN priority and resides in the frequency point. For the a users of the A operator preferentially reside in the F1 frequency point, and the B users of the B operator preferentially reside in the F2 frequency point. Then, the user terminal initiates access at the resident frequency point to request HPLMN service. The user a of the operator A initiates access at the frequency point F1 and accesses the core network of the home A, and the user B of the operator B initiates access at the frequency point F2 and accesses the core network of the home B.

In some embodiments, the number of the frequency points corresponding to the PLMN is multiple, and each frequency point corresponding to the PLMN has a priority. In step S206, the terminal selects a frequency point with the highest priority from the frequency points corresponding to the HPLMN to initiate access.

For example, when the access frequency points corresponding to the PLMNs broadcast by the base station are shared, the priorities of the frequency points corresponding to the PLMNs are broadcast, and the broadcast message may take the following form:

PLMN_1，Frequency priority(F_1、F_2、……、F_N)；

PLMN_2，Frequency priority(F_2、F_3、……、F_1)；

……

PLMN_N，Frequency priority(F_N、F_1、……、F_N-1)。

in the broadcast message, each PLMN corresponds to a frequency point priority list. Taking PLMN _1 and Frequency priority (F _1, F _2, … …, F _ N) as an example, the broadcast message indicates that the access Frequency points corresponding to PLMN _1 are F _1, F _2, … …, and F _ N in sequence according to the priority from high to low. The sharing base station broadcasts the frequency point level based on the PLMN priority, the F _1 frequency point priority of the operator A is higher than F _2, and the F _2 frequency point priority of the operator B is higher than F _ 1. In this way, the operator A and the operator B respectively preferentially reside and initiate access at the respective frequency points F _1 and F _2, which not only represents the sharing investment saving, but also represents the preferential access of the respective users.

In another case, the number of carriers shared by each operator is single. At this time, the access resource of the PLMN may be a physical random access channel PRACH sequence corresponding to the PLMN. Correspondingly, in step S206, the terminal initiates access by using the PRACH sequence corresponding to the HPLMN.

For example, operator a has frequency point F1, operator B has frequency point F2, and the two operators share carrier networking, and at this time, both parties only take out frequency point F1 to share networking. After receiving the broadcast message of the base station, the user terminal selects the PRACH sequence corresponding to the HPLMN of the user terminal according to the corresponding PLMN to initiate access. The PRACH is divided into a long code and a short code, where the long code length 839 and the short code length 139 are defined, and the short code root may be generated according to a certain rule, which is not described herein again.

In some embodiments, the number of PRACH sequences corresponding to the PLMN is multiple. In step S206, the terminal randomly selects one PRACH sequence from the plurality of PRACH sequences corresponding to the HPLMN, and initiates access using the randomly selected PRACH sequence.

For example, each base station may have N available PRACH numbers per carrier frequency. When the PRACH sequence corresponding to each PLMN is broadcasted by the base station, the broadcast message may take the following form:

PLMN_1，PRACH group(0、1、……、M₁-1)；

PLMN_2，PRACH group(M1、M1+1、……、M2-1)；

……

PLMN_i，PRACH group(Mi-1、Mi-1+1、……、N)。

in the broadcast message, each PLMN corresponds to a PRACH sequence packet. Taking PLMN _1, PRACH group (0, 1, … …, M1-1) as an example, the broadcast message indicates that the sequence number of the PRACH sequence corresponding to PLMN _1 includes 0, 1, … …, M₁-1. If the sequence number assigned to the PRACH sequence by the a operator is 0, 1, …, M₁-1, sequence number M assigned to PRACH sequence by B operator₁、M₁+1、……、M₂-1. Then, a-user of operator A selects 0, 1, …, M at F1 frequency point₁-1, any one PRACH sequence initiates access and accesses to home A core network; b-user of B operator selects M at F1 frequency point₁、M₁+1、……、M₂-1 initiating access by any one of the PRACH sequences, andand accessing the home B core network. When multiple operators share a single-frequency carrier network, because only one sharing frequency point is provided, users of the operator A and the operator B can respectively preferentially select respective PRACH sequences to initiate access through PRACH grouping, thereby not only embodying sharing and saving investment, but also embodying preferential access of the users to each operator.

An application example of the disclosed cell access method is described below with reference to fig. 3.

Fig. 3 shows a flowchart of an application example of the cell access method of the present disclosure. As shown in fig. 3, the present embodiment includes steps S301 to S306.

In step S301, the terminal receives a broadcast message transmitted by the base station.

In step S302, the terminal determines whether to perform multi-frequency or single-frequency carrier sharing networking according to the broadcast message.

If the carrier is a multi-frequency shared carrier network, executing step S303; if the set of carriers is a single frequency shared carrier, step S305 is executed.

In step S303, the terminal searches for a preferred localized frequency point corresponding to the HPLMN.

If the search is successful, go to step S304; if the search fails, the process returns to step S303.

In step S304, the terminal initiates random access at the preferred localized frequency point corresponding to the HPLMN.

In step S305, the terminal searches for a PRACH packet corresponding to the HPLMN.

If the search is successful, executing step S306; if the search fails, the process returns to step S305.

In step S306, the terminal initiates random access using the PRACH packet corresponding to the HPLMN.

Some embodiments of the disclosed cell access system are described below in conjunction with fig. 4.

Fig. 4 shows a schematic structural diagram of a cell access system according to some embodiments of the present disclosure. As shown in fig. 4, the cell access system 40 in the present embodiment includes:

a base station 402 configured to: broadcasting the mapping relation between the Public Land Mobile Network (PLMN) of each operator and the access resource of the PLMN by using the carrier wave shared by each operator; a terminal 404 configured to: utilizing a Home Public Land Mobile Network (HPLMN) to query a mapping relation to obtain access resources corresponding to the HPLMN; and initiating random access by using the access resource corresponding to the HPLMN.

In some embodiments, the number of carriers is multiple, and the access resource of the PLMN is a frequency point corresponding to the PLMN; the terminal 404 is configured to: and initiating access at a frequency point corresponding to the HPLMN.

In some embodiments, the number of the frequency points corresponding to the PLMN is multiple, and each frequency point corresponding to the PLMN has a priority; the terminal 404 is configured to: and selecting the frequency point with the highest priority from the frequency points corresponding to the HPLMN to initiate access.

In some embodiments, the number of the carriers is single, and the access resource of the PLMN is a physical random access channel PRACH sequence corresponding to the PLMN; the terminal 404 is configured to: and initiating access by using a PRACH sequence corresponding to the HPLMN.

In some embodiments, the number of PRACH sequences corresponding to the PLMN is plural; the terminal 404 is configured to: randomly selecting one PRACH sequence from a plurality of PRACH sequences corresponding to the HPLMN, and initiating access by utilizing the randomly selected PRACH sequence.

The above embodiments provide a cell access system. User terminals of different operators can preferentially select certain access resources to initiate random access according to the HPLMN, so that the user terminals of different operators can access the 5G shared network according to certain priority, and cell reselection and cell access based on PLMN priority are achieved.

Fig. 5 shows a schematic structural diagram of a cell access device according to some embodiments of the present disclosure. As shown in fig. 5, the cell access apparatus 50 of this embodiment includes: a memory 510 and a processor 520 coupled to the memory 510, the processor 520 being configured to perform the cell access method in any of the embodiments described above based on instructions stored in the memory 510.

Memory 510 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.

Cell access apparatus 50 may also include an input output interface 530, a network interface 540, a storage interface 550, and the like. These

interfaces

530, 540, 550 and the connections between the memory 510 and the processor 520 may be, for example, via a bus 560. The input/output interface 530 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 540 provides a connection interface for various networking devices. The storage interface 550 provides a connection interface for external storage devices such as an SD card and a usb disk.

The present disclosure also includes a computer readable storage medium having stored thereon computer instructions that, when executed by a processor, implement the cell access method in any of the foregoing embodiments.

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A cell access method, comprising:

the base station broadcasts the mapping relation between the Public Land Mobile Network (PLMN) of each operator and the access resource of the PLMN by using the carrier shared by each operator;

the terminal utilizes the home public land mobile network HPLMN to inquire the mapping relation to obtain the access resource corresponding to the HPLMN;

and the terminal initiates random access by using the access resource corresponding to the HPLMN.

2. The cell access method of claim 1, wherein the number of the carriers is multiple, and the access resource of the PLMN is a frequency point corresponding to the PLMN;

the terminal initiates random access by using the access resource corresponding to the HPLMN, and comprises the following steps: and the terminal initiates access at the frequency point corresponding to the HPLMN.

3. The cell access method of claim 2, wherein the number of the frequency points corresponding to the PLMN is plural, and each frequency point corresponding to the PLMN has a priority;

the terminal initiates access at the frequency point corresponding to the HPLMN, and the access comprises the following steps: and the terminal selects the frequency point with the highest priority from the frequency points corresponding to the HPLMN to initiate access.

4. The cell access method of claim 1, wherein the number of the carriers is single, and the access resource of the PLMN is a physical random access channel PRACH sequence corresponding to the PLMN;

the terminal initiates random access by using the access resource corresponding to the HPLMN, and comprises the following steps: and the terminal initiates access by utilizing the PRACH sequence corresponding to the HPLMN.

5. The cell access method of claim 4, wherein the number of PRACH sequences corresponding to the PLMN is plural;

the initiating access by the terminal by using the PRACH sequence corresponding to the HPLMN comprises the following steps: and the terminal randomly selects one PRACH sequence from the plurality of PRACH sequences corresponding to the HPLMN and initiates access by utilizing the randomly selected PRACH sequence.

6. A cell access system, comprising:

a base station configured to: broadcasting the mapping relation between the Public Land Mobile Network (PLMN) of each operator and the access resource of the PLMN by using the carrier wave shared by each operator;

a terminal configured to: utilizing a Home Public Land Mobile Network (HPLMN) to inquire the mapping relation to obtain an access resource corresponding to the HPLMN; and initiating random access by using the access resource corresponding to the HPLMN.

7. The cell access system of claim 6, wherein the number of the carriers is multiple, and the access resource of the PLMN is a frequency point corresponding to the PLMN;

the terminal is configured to: and initiating access at a frequency point corresponding to the HPLMN.

8. The cell access system of claim 7, wherein the number of the frequency points corresponding to the PLMN is plural, and each frequency point corresponding to the PLMN has a priority;

the terminal is configured to: and selecting the frequency point with the highest priority from the frequency points corresponding to the HPLMN to initiate access.

9. The cell access system of claim 6, wherein the number of the carriers is single, and the access resource of the PLMN is a Physical Random Access Channel (PRACH) sequence corresponding to the PLMN;

the terminal is configured to: and initiating access by using a PRACH sequence corresponding to the HPLMN.

10. The cell access system of claim 9, wherein the number of PRACH sequences corresponding to the PLMN is plural;

the terminal is configured to: randomly selecting one PRACH sequence from a plurality of PRACH sequences corresponding to the HPLMN, and initiating access by utilizing the randomly selected PRACH sequence.

11. A cell access apparatus, comprising:

a memory; and

a processor coupled to the memory, the processor configured to perform the cell access method of any of claims 1-5 based on instructions stored in the memory.

12. A computer readable storage medium, wherein the computer readable storage medium stores computer instructions which, when executed by a processor, implement the cell access method of any one of claims 1 to 5.