WO2012171174A1

WO2012171174A1 - Method, base station and user equipment for forwarding public land mobile network identification of operator

Info

Publication number: WO2012171174A1
Application number: PCT/CN2011/075726
Authority: WO
Inventors: 张广行; 梁鹏; 熊建强
Original assignee: 华为技术有限公司
Priority date: 2011-06-14
Filing date: 2011-06-14
Publication date: 2012-12-20
Also published as: CN102726098A; CN102726098B

Abstract

Disclosed are a method, base station and user equipment for forwarding a public land mobile network identification (PLMN ID) of an operator, which belong to the field of communications and solve the problem of that a user equipment (UE) can not handover to a target eNB as the UE can not obtain the exact PLMN ID of a main operator for the target eNB under the scene of carrier frequency sharing. The method includes the following steps: if a PLMN ID of a main operator for a base station is not comprised in a public land mobile network (PLMN) list of a system information block (SIB1) to be broadcasted by the base station, adding the PLMN ID of the main operator for the base station into the SIB1; and broadcasting the SIB1.

Description

Carrier public land mobile network identity delivery method, base station and user equipment

The present invention relates to the field of communications, and in particular, to a carrier public land mobile network identity delivery method, a base station, and a user equipment. Background technique

Network sharing, the earliest demand comes from Europe. Operators share network resources to achieve cost savings and investment savings. At the same time, network construction cycles can be greatly shortened and operator coverage can be effectively increased. Currently, there are two types of network sharing architectures in the industry: access network sharing and gateway sharing. Carrier frequency sharing is one of the modes shared by the access network.

In the carrier-sharing mode, the hardware resources of the eNB (base station) and the carrier frequency are shared by multiple operators. Each base station cell is shared by multiple operators. The core networks of individual operators are independent. The shared access network can connect to different core networks through different logical S1 interfaces. Access network sharing is transparent to users and the core network. In the shared mode, operators can be classified into two types: primary carrier and secondary carrier. An eNB can only be configured with one primary carrier, and multiple secondary carriers can be configured. The main operator has the right to control the configuration of the shared network and the access network data, and the operator only has the right to write and read data of some access networks.

CGK Cell Global Identifier is a global cell identity consisting of a Global-eNB-ID (Global Base Station Identity) and a cell identity. The Global-eNB-ID is in turn composed of a PLMN ID (Public Land Mobile Network Identity) and an eNB ID (Base Station Identity). In the carrier sharing scenario, the PLMN ID in the CGI is the PLMN ID of the primary carrier. That is to say, one CGI includes: the PLMN ID of the primary carrier, the eNB ID and the cell identity.

When the carrier frequency is shared by the scenario, the PLMN ID in the Global-eNB-ID carried in the S1 setup request message between the eNB and the MME (Mobility Management Entity) is always configured for the eNB. The PLMN ID of the primary carrier. That is, the eNB identifies only the primary in all MMEs connected to it. The operator's PLMN ID, not the PLMN ID from the carrier.

When the user of the carrier is switched from the serving eNB to the target eNB in the carrier sharing scenario, the PLMN ID of the target eNB carried in the handover request message is always the PLMN ID of the target eNB's primary carrier. The PLMN ID of the target eNB carried in the handover request message sent by the serving eNB must be consistent with that reported by the target eNB to the MME in the S1 setup request message. Otherwise, the MME may not find the target eNB, causing the handover to fail.

If the cell is shared by the four carriers and is successfully connected to the core network of the four operators, four will be issued in the PLMN list in the SIB 1 (System Information Block) of the cell broadcast. The PLMN ID of the operator. According to the existing 3GPP protocol, 3GPP TS 36.33 1 V9.6.0 (201 1 -03), (refer to Section 5.2, Section 6.2.2), the PLMN ID of the main operator is always ranked first in the PLMN list. The UE obtains the PLMN ID of the primary carrier by reading the PLMN ID ranked first in the PLMN list of SIB 1. 3 GPP protocol documents are available through the 3GPP web site at http://〃 www.3 gpp.org/.

In the above-mentioned carrier-frequency sharing scenario, the inventors have found that in the prior art, when there is no connection established between the target eNB and the MME of the primary carrier of the target eNB, or between the target eNB and the MME of the primary carrier of the target eNB, When the link fails, the PLMN list of the SIB 1 delivered by the target eNB will not include the PLMN ID of the primary carrier of the target eNB, and the first one of the PLMN lists of the SIB l is the PLMN ID of the other secondary carrier. At this time, the operator UE cannot obtain the correct primary carrier PLMN ID of the target eNB from the PLMN list of the SIB 1, and thus the operator UE cannot perform the handover operation to the target eNB. Switching is implemented.

Patent application CN 101 147 412 A discloses a method for connection switching between cells or base stations sharing at least part of a radio access network of a wireless communication system, including a core network.

Patent application US 2007/0161373 A1 discloses a method of sharing a wireless access network. The plurality of PLMN IDs are sent to the user equipment for selection by using a shared radio access network.

Patent application WO/2009/1 19699A2 discloses an automatic neighborhood relationship ( Automatic Neighbour Relation , ANR ) Switching method in the switching process scenario. Patent application WO2009120127A1 discloses a method of establishing a neighborhood relationship.

Summary of the invention

An embodiment of the present invention provides an operator public land mobile network identity sending method, a base station, and a user equipment, to solve the problem that the UE cannot obtain the correct target eNB's primary carrier PLMN ID in the carrier sharing scenario. The problem that the target eNB performs handover.

In order to achieve the above objectives, embodiments of the present invention adopt the following technical solutions:

In one aspect, a method for issuing a public land mobile network identity of an operator according to claim 1, 6, 9, or 1 1 is provided.

In one aspect, a base station according to claim 12 or 13 is provided.

In one aspect, a user equipment according to claim 14 is provided.

In one aspect, a communication system according to claim 15 is provided. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of an ANR handover procedure according to an embodiment of the present invention;

2 is a flow chart of a method for issuing a PLMN ID of an operator according to Embodiment 1 of the present invention;

3 is a schematic diagram of an ANR handover procedure of an operator PLMN ID delivery method according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present disclosure;

FIG. 6 is a flow of a method for delivering a primary operator PLMN ID according to Embodiment 5 of the present invention; Block diagram

7 is a schematic diagram of an ANR handover procedure of an operator PLMN ID delivery method according to Embodiment 5 of the present invention; FIG. 8 is a flow chart of a method for issuing a carrier PLMN ID according to Embodiment 7 of the present invention; A schematic diagram of an ANR handover procedure of a carrier PLMN ID delivery method provided in Embodiment 7.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the embodiment of the present invention, when the neighbor relationship is not configured and the PCI (Physical Cell Identifier) conflicts, the eNB may acquire a new neighbor by using an ANR (Automatic Neighbor Relation) measurement process. The area PCI and the corresponding CGI maintain and improve the neighbor relationship, so as to ensure that the UE in the eNB cell can switch normally.

The switching process of the ANR according to an embodiment of the present invention is as shown in FIG. 1, and mainly includes the following steps:

5101. The UE reports the A3 event to the serving eNB, and reports the PCI of the target eNB (ie, the neighboring cell eNB). The A3 event here refers to the same frequency switching event. Further reference can be made to the provisions of the 3GPP protocol (refer to 3GPP TS 36.33 1 V9.6.0 (201 1 -03), section 5.5).

5102. The serving eNB sends a CGI measurement control message for the target eNB to the UE.

S103. The UE searches for the SIB 1 of the target eNB, and reports the target to the serving eNB. CGI of the eNB.

SI 04. The serving eNB sends a handover request for the target eNB to the UE according to the CGI reported by the UE.

In the scenario of the carrier frequency sharing, in step S103, when the UE performs the ANR measurement to search for the SIB1 of the target eNB (ie, the neighboring cell eNB), the PLMN ID of the primary carrier of the target eNB is obtained from the first bit in the PLMN list of the SIB1; The PLMN ID of the primary carrier is filled in the CGI and reported to the serving eNB. The serving eNB then sends a handover request for the target eNB to the UE according to the CGI reported by the UE, where the handover request message carries the PLMN ID of the primary carrier of the target _e NB.

Embodiment 1

The method for issuing the PLMN ID of the operator provided by the embodiment of the present invention, as shown in FIG. 2, includes:

5201. If the PLMN list of the primary carrier of the base station is not included in the PLMN list of the SIB1 that the base station will broadcast, add the PLMN ID of the primary carrier of the base station to the SIB1.

It may be to add the PLMN ID of the primary carrier to the first place in the SIMN1 PLMN list.

Here, the PLMN ID of the primary carrier of the base station may be added to the PLMN list of SIB1; or it may be added to one PLMN cell in SIB1.

5202, broadcasting the SIB1.

Since the SIB1 contains the PLMN ID of the primary carrier of the base station, the UE can obtain the PLMN ID of the primary carrier of the base station from the SIB1.

The method for transmitting the PLMN ID of the operator in the first embodiment of the present invention ensures that the broadcasted SIB1 includes the PLMN ID of the primary carrier of the base station; so that the UE can obtain the PLMN ID of the primary carrier of the base station from the SIB1. In this way, even if the S1 link between the base station and the primary carrier MME fails, the SIB1 broadcast by the base station always contains the PLMN ID of the primary carrier of the base station, so that the UE can obtain the primary of the base station in any case. The PLMN ID of the operator, in turn, ensures the handover of the UE to the base station.

Embodiment 2 The embodiment of the present invention uses the carrier PLMN ID delivery method provided in the first embodiment, and uses the ANR algorithm handover process as an example for description. As shown in Figure 3, the method steps include:

5301. The UE reports the A3 event to the serving eNB, and reports the PCI of the target eNB (ie, the neighboring cell eNB). The A3 event here refers to the same frequency switching event. Further reference can be made to the provisions of the 3GPP protocol (refer to 3GPP TS 36.33 1 V9.6.0 (201 1 -03), section 5.5).

5302. The serving eNB sends a CGI measurement control message for the target eNB to the UE.

5303. The UE searches for the SIB 1 of the target eNB, and reports the CGI of the target eNB to the serving eNB.

Specifically, in step S303, if the S1 link between the target eNB and the primary carrier MME fails or otherwise causes the target eNB to broadcast, the primary operator of the target eNB is not included in the list of PLMNs in the SIB1 to be broadcasted. The PLMN ID adds the PLMN ID of the primary carrier of the target eNB to the SIB 1. For example, it is added to the first place in the PLMN list of this SIB 1. Therefore, it is ensured that the PLMN list of the SIB 1 broadcast by the target eNB includes the PLMN ID of the primary carrier of the target eNB. In this way, after the operator UE searches for the SIB 1 of the target eNB, the PLMN ID of the primary carrier of the target eNB can be obtained from the PLMN list of the SIB 1, and the primary operator PLMN ID is regarded as the PLMN of the target eNB. The ID is filled in the CGI and reported to the serving eNB.

5304. The serving eNB sends a handover request for the target eNB to the UE according to the CGI reported by the UE. The handover request message carries the primary operator PLMN ID of the target eNB.

Since the UE can always obtain the correct primary carrier PLMN ID of the target eNB from the SIB 1 of the target eNB, the handover request initiated by the serving eNB will always carry the correct primary eNB PLMN ID of the target eNB. That is, the primary carrier PLMN ID of the target eNB carried in the handover request is always consistent with the target eNB reporting the MME to the MME in the S1 setup request message, which is the PLMN ID of the primary carrier of the target eNB, and thus can The handover of the UE to the target eNB is guaranteed. Further, the above method may further include:

An identifier is added to the SIB 1 broadcast by the target eNB to indicate whether the S 1 link between the target eNB and the MME of the primary carrier of the target eNB is properly connected. It is possible to add an identification cell to the SIB 1 or add an identification bit to the PLMN list.

Take the example of adding a flag bit to the PLMN list. A bit may be added at the end of the PLMN list. When the S 1 link between the base station and the MME of the primary carrier of the base station is normal, the bit may be set to 1 to indicate that the connection is normal, the primary carrier The UE may access; when the S1 link between the base station and the MME of the primary carrier of the base station fails or the connection is abnormal due to other reasons, the bit may be set to 0 to indicate that the primary carrier is not connected. Normally, the primary carrier's UE cannot access. Of course, as long as the S1 link between the base station and the secondary carrier is normal, the UE of the secondary carrier can still switch to the base station, and normally access the network from the operator.

When the UE of the primary carrier is ready to access the base station, the identification bit needs to be determined. If the bit is 1, it indicates that access is available; when 0, it indicates that access is not allowed.

The method for transmitting the PLMN ID of the operator provided by the second embodiment of the present invention ensures that the PLMN list of the SIB 1 broadcasted by the base station includes the PLMN ID of the primary carrier of the base station; so that the UE obtains the PLMN list from the SIB 1 . The PLMN ID of the primary carrier of the base station. In this way, even if the S1 link between the base station and the primary carrier MME fails, the SIB 1 broadcast by the base station also includes the PLMN ID of the primary carrier, so that the UE can obtain the primary carrier of the base station in any case. The PLMN ID, in turn, guarantees the handover of the UE to the base station.

Embodiment 3

A third embodiment of the present invention provides a user equipment, as shown in FIG. The user equipment includes a processor 40, and general components such as a memory component memory, a screen, an antenna, an input/output interface I/O, and the like. These general components are not shown in the figures. Wherein, the processor can read and run the program such that the foregoing method embodiment is executed in the user equipment.

The processor 40 can include: The reporting unit 401 is configured to report the A3 event to the serving eNB, and report the PCI of the target eNB. The obtained PLMN ID of the primary carrier of the target eNB is filled in the CGI and reported to the serving eNB.

The receiving unit 402 is configured to receive, by the serving eNB, a CGI measurement control message for the target eNB, where the receiving service eNB carries the handover request for the handover target eNB, where the handover request message carries the primary operation of the handover target eNB. The PLMN ID of the merchant.

The search obtaining unit 403 is configured to search for the SIB1 of the target eNB, and obtain the PLMN ID of the primary carrier of the target eNB from the SIB1.

The search obtaining unit 403 includes:

The PLMN list reading module 4031 is configured to read the PLMN ID of the primary carrier of the target eNB from the PLMN list of the SIB1. When the primary operator's PLMN ID is located in the first place of the PLMN list, the first bit of the PLMN list is read.

and / or

The PLMN cell reading module 4032 is configured to read the PLMN ID of the primary carrier of the target eNB from the PLMN cell of the SIB1.

In addition, the processor 40 may further include:

The identifier reading module 404 is configured to read an identifier included in the SIB1 for indicating whether the connection between the base station and the primary carrier of the base station is normal. The subsequent identification can determine whether the primary carrier can be accessed according to the identifier. Here, when the identifier indicates that the connection with the primary carrier is abnormal, the UE of the primary carrier may not access, which may save network resources.

The user equipment provided by the embodiment of the present invention can obtain the PLMN ID of the primary carrier of the base station from the SIB1 broadcasted by the base station in any case, thereby ensuring the handover of the UE to the base station.

Embodiment 4

The base station 50 provided in the fourth embodiment of the present invention, corresponding to the method provided in the first embodiment, as shown in FIG. 5, includes:

Storage unit 501; Power amplifier 502;

Input/output unit 503;

The processor 504 can read and run the program such that the foregoing method embodiments are executed in the base station:

If the PLMN list of the primary operator of the base station is not included in the PLMN list of the SIB1 to be broadcast by the base station, the PLMN ID of the primary carrier of the base station is added to the SIB1;

Broadcast the SIB1.

Here, the PLMN ID of the primary carrier of the base station may be added to the PLMN list of SIB1, or may be added to one PLMN cell of the SIB1.

The base station provided in Embodiment 4 of the present invention ensures that the broadcast SIB1 includes the PLMN ID of the primary carrier of the base station; so that the UE can obtain the PLMN ID of the primary carrier of the base station from the SIB1. In this way, even if the S1 link between the base station and the primary carrier MME fails, the SIB1 broadcast by the base station always contains the PLMN ID of the primary carrier of the base station, so that the UE can obtain the primary of the base station in any case. The PLMN ID of the operator, in turn, ensures the handover of the UE to the base station.

Further, an identifier may be added to the SIB 1 for indicating whether the S1 link between the base station and the MME of the primary carrier of the base station is properly connected. When the primary carrier's S1 link is normal, the identifier can be set to 1, indicating that the base station is connected to the primary carrier of the base station, and the primary carrier's UE can access; when the primary carrier's S1 link is faulty or due to If the connection is abnormal, the identifier can be set to 0 to indicate that the base station and the primary carrier of the base station are not connected properly, and the primary carrier's UE cannot access.

When the UE of the primary carrier enters the network, the identifier needs to be judged. If the bit is 1, it means that it can be accessed. If it is 0, it means that access is not allowed.

Of course, as long as the S1 link between the base station and the secondary carrier is normal, the UE of the secondary carrier can still switch to the base station, and normally access the network from the operator.

Embodiment 5 The method for issuing the PLMN ID of the operator provided in the fifth embodiment of the present invention, as shown in FIG. 6, includes:

S601. Add, in the SIB 1 that the base station broadcasts, a PLMN cell that is used to carry the primary operator PLMN ID of the base station, so that the UE acquires the PLMN ID of the primary carrier of the base station from the PLMN cell of the SIB1. . The PLMN cell is different from the original PLMN information in the PLMN list of the SIB 1 delivered by the eNB in the prior art. After that, the SIB 1 is broadcast. The method for transmitting the PLMN ID of the operator provided by the fifth embodiment of the present invention adds a PLMN cell for carrying the primary operator PLMN ID of the base station to the SIB 1 broadcast by the base station, so that the UE directly receives the PLMN message from the SIB 1 . The PLMN ID of the primary carrier of the base station is obtained in the element. In this way, even if the S 1 link between the base station and the primary carrier MME fails, the PLMN cell in the SIB 1 broadcast by the base station always contains the PLMN ID of the primary carrier, so that the UE can obtain the MAC address in any case. The PLMN ID of the primary carrier of the base station, thereby ensuring normal handover from the operator UE to the base station. Embodiment 6 The sixth embodiment of the present invention uses the method for transmitting the PLMN ID of the operator provided in the fifth embodiment, and takes the ANR algorithm switching process as an example for description. As shown in Figure 7, the method steps include:

5701. The UE reports an A3 event to the serving eNB, and reports the PCI of the target eNB (ie, the neighboring cell). The A3 event here refers to the same frequency switching event. Further reference can be made to the provisions of the 3GPP protocol (refer to 3GPP TS 36.331 V9.6.0 (201 1-03), section 5.5).

S702. The serving eNB sends a CGI measurement control message to the target eNB to the UE.

5703. The UE searches for the SIB 1 of the target eNB, and reports the CGI of the target eNB to the serving eNB.

Specifically, a PLMN cell for separately carrying the PLMN ID of the primary carrier of the target eNB is added to the SIB 1 broadcast by the target eNB, and the PLMN ID ranked first in the PLMN list is no longer read as in the prior art. In this way, regardless of whether the S1 link of the primary carrier of the target eNB is faulty, when the UE searches for SIB 1, the PLMN ID of the correct primary carrier of the target eNB can always be obtained by reading the PLMN cell, and the primary is obtained. Carrier PLMN ID The PLMN ID, which is the target eNB, is filled in the CGI and reported to the serving eNB. The PLMN cell is different from the original PLMN information in the PLMN list of the SIB 1 delivered by the eNB.

S704. The serving eNB sends a handover request for the target eNB to the UE according to the CGI reported by the UE. The handover request message carries the PLMN ID of the target eNB.

Since the UE can always obtain the correct primary carrier PLMN ID of the eNB from the SIB1 of the target eNB, the handover request initiated by the serving eNB will always carry the correct target eNB's PLMN ID, that is, the handover request carries The PLMN ID of the target eNB is consistent with the target eNB's reporting to the MME in the S1 setup request message, which is the PLMN ID of the primary carrier. Therefore, the normal handover of the UE to the target eNB can be ensured. The seventh embodiment of the present invention provides the method for issuing the PLMN ID of the operator. As shown in FIG. 8, the method includes:

5901. When the base station eNB broadcasts the PLMN list of the SIB1 that does not include the PLMN ID of the primary carrier of the base station, the base station sends a configuration update message to each connected mobility management device by using an S1 interface with the secondary carrier.

5902. The base station replaces, by the configuration update message, the PLMN ID of the operator that is currently ranked first in the PLMN list in the SIB1 with the PLMN ID of the primary carrier of the eNB, so that the UE obtains the PLMN list of the SIB1. The PLMN ID of the primary carrier of the base station. The SIBl is then broadcast. The method for delivering the primary operator PLMN ID provided in the seventh embodiment of the present invention may enable the base station to connect the PLMN through the S1 interface with the secondary carrier when the S1 link between the base station and the primary carrier MME fails. The PLMN ID of the carrier that is currently in the first place in the list is updated to the PLMN ID of the primary carrier of the base station, so that the UE can still obtain the PLMN ID of the primary carrier of the base station through the SIB1, thereby ensuring that the UE is to the base station. Normal switching.

The eighth embodiment of the present invention adopts the method for delivering the primary operator PLMN ID provided in the seventh embodiment. The ANR switching process is taken as an example for description. As shown in FIG. 9, the method steps include:

51001: The UE reports an A3 event to the serving eNB, and reports the PCI of the target eNB (ie, the neighboring cell). The A3 event here refers to the same frequency switching event. Further reference can be made to the provisions of the 3GPP protocol (refer to section 3 of 3GPP TS 36.331 V9.6.0 (2011-03)).

51002. The serving eNB sends a CGI measurement control message to the target eNB to the UE.

S 1003. The UE searches for the SIB1 of the target eNB, and reports the CGI of the target eNB to the serving eNB. Specifically, when the target eNB will not include the PLMN ID of the primary carrier in the PLMN list of the broadcasted SIB1, the base station sends the configuration update message to the connected mobility management device (MME) through the S1 interface with the secondary carrier, and the PLMN is used. The PLMN ID of the primary carrier of the target eNB is updated from the PLMN ID of the operator in the first row in the list; so that the UE acquires the PLMN ID of the primary carrier of the target eNB from the PLMN list of the SIB1.

In addition, the above method can be selected to be executed when the ANR algorithm is turned on. When the ANR algorithm is turned off, the other S1 interfaces are not updated. When the neighbor relationship is configured correctly, if the S1 interface is updated, the switch will fail. After several handover failures occur, the ANR algorithm deletes the neighbor relationship and the user can switch normally. When the ANR algorithm is turned off, no update processing is performed, so this problem does not occur. From above, when the primary carrier S 1 link of the target eNB fails, and the ANR algorithm is opened, the PLMN ID of the target eNB is updated to the PLMN of the primary carrier of the current first position of the PLMN list due to the update processing of the other S 1 interfaces. ID. Therefore, after the UE searches for the SIB1, the PLMN ID of the primary carrier of the PLMN list of the SIB1 is read, and the PLMN ID of the primary carrier is regarded as the PLMN ID of the target eNB, and is filled in the CGI and then reported. Give the service eNB.

S1004: The serving eNB sends a handover request for the target eNB to the UE according to the CGI reported by the UE. The handover request message carries the PLMN ID of the target eNB.

Since the UE acquires the correct PLMN ID (ie, the updated PLMN ID) of the eNB from the SIB1 of the target eNB, the handover request initiated by the serving eNB is also always carried. The PLMN ID of the correct target eNB, that is, the PLMN ID of the target eNB carried in the handover request is always consistent with the target eNB in the S1 setup request message, and is the updated PLMN ID, so The normal handover of the UE to the target eNB is guaranteed. The embodiment of the invention further provides a user equipment. The user equipment includes a processor, as well as general components such as storage components, screens, antennas, and input and output interfaces. The processor can read and run the program, so that the part of the foregoing method embodiments that the user equipment needs to perform is executed in the user equipment. For example: The broadcasted SIB 1 is correctly received by the user equipment, and the PLMN ID of the primary carrier of the base station is correctly read by the user equipment.

The embodiment of the present invention further provides a base station, including: a storage unit, a power amplifier, an input/output unit, and a processor, where the processor can read and run a program, so that the steps of the foregoing method embodiments involve the base station side in the base station. It was implemented. The base station can be the serving base station in the foregoing method embodiments. The base station may also be the target base station in the foregoing method embodiments.

The embodiment of the invention further provides a communication system, which includes the target base station, the serving base station and the user equipment in the foregoing embodiments.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Claim

A method for issuing a public land mobile network identity of an operator, which is characterized by:

If the public land mobile network identifier PLMN ID of the primary carrier of the base station is not included in the public land mobile network PLMN list of the broadcast system command module SIB1, the PLMN ID of the primary carrier of the base station is added to the Said in SIB1;

Broadcast the SIB1.

2. The method according to claim 1, wherein a PLMN ID of a primary operator of the base station is added to a PLMN list of the SIB1, or a PLMN letter added to the SIB 1 Yuanzhong.

The method according to claim 1 or 2, wherein the method further comprises:

The SIB1 includes an identifier indicating whether the S1 link between the base station and the mobility management device MME of the primary carrier of the base station is normally connected.

The method according to claim 4, wherein the identifier is an identifier cell in the SIB1, or an identifier bit in a PLMN list of the SIB1.

The method according to any one of claims 1 to 4, wherein the method further comprises:

The user equipment reports an A3 event to the serving base station;

Receiving, by the user equipment, a CGI control measurement message sent by the serving base station for the target base station;

The user equipment searches for SIB1 of the target base station, and the SIB1 is the broadcasted SIB1;

The user equipment reports the CGI of the target base station to the serving base station;

The user equipment receives a handover request sent by the serving base station, where the handover request carries a primary operator PLMN ID of the target base station.

A method for issuing a public land mobile network identifier of a main operator, which is characterized by comprising:

Adding the primary operator PLMN that is used to carry the base station to the SIB1 that the base station will broadcast. PLMN cell of ID;

Broadcast the SIB 1.

The method according to claim 6, wherein the PLMN cell is configured to enable a UE to obtain a PLMN ID of a primary carrier of the base station from the PLMN cell of the SIB1.

The method according to any one of claims 6 or 7, wherein the method further comprises:

The user equipment reports an A3 event to the serving base station;

The user equipment searches for SIB 1 of the target base station, and the SIB 1 is the SIB 1 that is broadcasted;

A method for issuing a public land mobile network identity of a primary carrier, comprising: a PLMN ID of a primary carrier that does not include the base station in a public land mobile network PLMN list of a SIB1 to be broadcast by a base station; Transmitting, by the base station, a configuration update message to each connected mobility management device MME by using an S1 interface from the operator;

The configuration update message is used by the base station to replace the PLMN ID of the operator that is currently ranked first in the PLMN list in the SIB1 with the PLMN ID of the primary carrier of the base station; and broadcast the SIB1.

The method according to claim 9, wherein the method further comprises:

The user equipment reports an A3 event to the serving base station;

Receiving, by the user equipment, a CGI control measurement message sent by the serving base station for the target base station; The user equipment searches for the SIB 1 of the target base station, where the SIB 1 is the broadcasted SIB 1 ;

A method for issuing a public land mobile network identity of a main operator, which is characterized by comprising:

The user equipment reports an A3 event to the serving base station;

The user equipment searches for SIB 1 of the target base station;

Receiving, by the user equipment, a handover request sent by the serving base station, where the handover request carries a primary operator PLMN ID of the target base station;

The SIB 1 includes a primary operator PLMN ID of the target base station, and the primary operator PLMN ID of the target base station is added to the SIB 1 by one of the following methods:

If the public land mobile network PLMN list of the primary carrier of the target base station is not included in the public land mobile network PLMN list of the system message module SIB 1 to be broadcast by the target base station, the primary carrier of the target base station is a PLMN ID is added to the SIB 1; or

Adding, in the SIB1 to be broadcast, the PLMN cell used by the target base station to carry the primary operator PLMN ID of the target base station; or when the target base station will broadcast the SIB1 public land mobile network PLMN list not included a PLMN ID of the primary carrier of the target base station, the target base station transmitting a configuration update message to each connected mobility management device MME by using an S1 interface from the operator; the configuration update message is used by the target base station Replacing the current PLMN ID of the operator in the first place in the PLMN list in the SIB1 with the primary carrier of the target base station PLMN ID.

12. A serving base station, comprising a storage unit, a power amplifier, an input/output unit, and a processor, wherein the processor is configured to read and run a program, such that any one of claims 1-11 The method involves the step of serving the base station side being performed in the serving base station.

A target base station, comprising a storage unit, a power amplifier, an input/output unit, and a processor, wherein the processor is configured to read and run a program, such that any one of claims 1-11 The method involves the step of the target base station side being performed in the target base station.

14. A user equipment, comprising a processor, a storage component, a screen, an antenna, and an input/output interface, wherein the processor is configured to read and run a program, such that any one of claims 1 - 1 1 The SIB 1 broadcast by the method is correctly received, and the PLMN ID of the primary carrier of the base station is correctly read.

A communication system comprising the serving base station according to claim 12, the target base station according to claim 13, and the user equipment according to claim 14.