JP2011223524A - Ems - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an EMS that easily registers contiguity information to contiguous base stations when a base station is newly added.SOLUTION: The EMS which performs operation management on a plurality of contiguous base stations 14a to 14d connected by radio to a terminal 12 acquires position information on base stations 14a to 14d, specifies the base station in contiguity relation among the base stations 14a to 14d based upon the position information, and registers the contiguity information to the base stations 14a to 14d. Consequently, the contiguity information is easily registered to the base stations in contiguity relation. Further, the contiguity information is easily updated as an existent base station is changed or removed.

Description

  The present invention relates to an EMS that performs operation management of a plurality of base stations that are wirelessly connected to a terminal.

  As a next-generation high-speed mobile communication system, WiMAX (Worldwide Interoperability for Microwave Access) has attracted international attention, and the introduction of this system has started.

  In this WiMAX system, a large number of base stations that are wirelessly connected to terminals are installed. When installing this base station, it is necessary to set various parameters for each base station, and this setting is normally performed by EMS (Element Management System).

  Further, in the WiMAX system, adjacent base stations need to acquire information on adjacent base stations in advance for terminal handover and the like. This information is usually registered with each base station by EMS.

“WiMAX Network Management NMS to EMS Interface” August 28, 2008

  However, when a new base station is added in a state in which base stations have already been set, it is necessary to register new base station information with respect to the existing base station. If there are many, the registration procedure becomes complicated.

  The present invention has been made in consideration of the above-described problems, and when a new base station is added, it is possible to easily register adjacent information to a base station adjacent to the new base station. The aim is to provide a possible EMS. It is another object of the present invention to provide an EMS that can easily update adjacent information in accordance with the change and removal of an existing base station.

  The EMS according to the present invention is an EMS that performs operation management of a plurality of base stations that are wirelessly connected to a terminal, acquires position information of each of the base stations, and based on the position information, between the base stations. The base stations in the adjacency relationship are specified, and adjacency information is registered in each base station.

  When the EMS adds a new base station to the WiMAX system, the EMS acquires position information of the new base station, and is adjacent to the new base station based on the position information. A base station is specified, and adjacent information of the new base station is registered in each base station.

  The EMS registers the adjacency information of the new base station with respect to the base stations in the adjacency relationship.

  The EMS acquires transmission output information of the new base station, and determines the adjacency relationship based on the position information and the transmission output information.

  According to the EMS of the present invention, when a new base station is added to the WiMAX system, the base station adjacent to the new base station is identified based on the position information of the new base station. Adjacent information can be easily registered to a base station that is adjacent to a new base station. In addition, it is possible to simplify the updating of the adjacent information according to the change and removal of the existing base station.

It is explanatory drawing of a WiMAX system provided with EMS which concerns on embodiment of this invention. It is explanatory drawing of the structure of EMS which concerns on embodiment of this invention. It is explanatory drawing of the procedure for registering adjacent information. FIG. 4A is an explanatory diagram of an arrangement relationship of base stations before a base station is added, and FIG. 4B is an explanatory diagram of a table showing adjacency information. FIG. 5A is an explanatory diagram of the arrangement relationship of base stations after the addition of the base station, and FIG. 5B is an explanatory diagram of a table showing adjacency information.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram of a WiMAX communication system 10 including an EMS according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a configuration of the EMS according to an embodiment of the present invention.

  The WiMAX communication system 10 includes an ASN (Access Service Network) 18, a CSN (Connectivity Service Network) 20, and an EMS 22.

  The ASN 18 includes base stations 14 a to 14 c that are wirelessly connected to a terminal 12 such as a computer or a mobile phone having a communication function, and an ASNGW (Access Service Network-Gateway) 16 that performs QoS management and the like. Here, each of the base stations 14a to 14c includes a GPS receiver.

The CSN 20 includes a PF (Policy Function) server, an AAA (Authentication Authorization Accounting) server, and a DHCP (Dynamic Host).
A network including a Configuration Protocol server.

  The EMS 22 is a device that includes a base station information acquisition unit 24, an adjacent relationship specifying unit 26, and an adjacent information registration unit 28, and performs control management of the base stations 14a to 14d.

  The base station information acquisition unit 24 acquires position information obtained from the GPS mounted in each of the base stations 14a to 14d and the transmission output information of the base stations 14a to 14d as base station information.

  The adjacency specifying unit 26 determines the adjacency relationship between the base stations 14a to 14d based on the base station information acquired by the base station information acquiring unit 24, and specifies a base station adjacent to the newly installed base station. . The adjacency specifying unit 26 includes a table T in which adjacency information is recorded.

  The adjacency information registration unit 28 registers information of a new base station as adjacency information with respect to an existing base station whose adjacency relationship has been specified.

  Next, registration of adjacent information when a base station 14d, which is a new base station, is added to the WiMAX communication system will be described with reference to FIGS. Here, FIG. 3 is an explanatory diagram of a procedure for registering adjacent information, and FIG. 4A is an explanatory diagram of an arrangement relationship of the base stations 14a to 14c before the base station 14d is added. FIG. 4B is an explanatory diagram of the table T indicating the adjacent information in that state, and FIG. 5A is an explanatory diagram of the arrangement relationship of the base stations 14a to 14d after the base station 14d is added. FIG. 5B is an explanatory diagram of the table T showing the adjacent information in that state.

  In the registration of adjacent information, first, the newly added base station 14d acquires its position information by the GSP receiver (step S1). The base station information acquisition unit 24 of the EMS 22 acquires base station information including the position information and transmission output information of the base station 14d (step S2).

  After acquiring the base station information of the ASNGW 16d, the base station information acquisition unit 24 inquires of the base stations 14a to 14c about each base station information (step S3). In response to the inquiry, the base stations 14a to 14c transmit each base station information to the base station information acquisition unit 24 (step S4). The base station information acquisition unit 24 transfers the received base station information to the adjacent relationship specifying unit 26.

  The adjacency specifying unit 26 of the EMS 22 obtains each installation position from the position information of the base stations 14a to 14d based on the transferred base station information, determines each cell radius from the transmission output information, and determines the base stations 14a to 14d. The adjacent relationship is specified and the table T indicating the relationship is updated (step S5). The adjacency relationship between base stations is considered to be adjacent when cells overlap, and is not adjacent when cells do not overlap.

  In the state before the base station 14d is added, as shown in FIG. 4A, the cell Ca of the base station 14a, the cell Cb of the base station 14b, and the cell Cc of the base station 14a are in a mutually overlapping relationship. , Have an adjacency relationship between them. Therefore, the base stations 14b and 14c are adjacent to the base station 14a, the base stations 14a and 14c are adjacent to the base station 14b, and the base stations 14a and 14b are adjacent to the base station 14c. The relationship is recorded in the table T as adjacent information.

  In the state after the base station 14d is added, as shown in FIG. 5A, the base station 14a is in a relationship in which cells overlap with the base stations 14b to 14d and the base station 14c The base stations 14a and 14b and the base station 14d are adjacent to each other. Although the base stations 14a and 14c have a relationship in which the cells overlap and have an adjacent relationship, the base station 14d does not have an adjacent relationship because the cells do not overlap. Further, the base station 14b has the same adjacency relationship as the base station 14d. Therefore, base stations 14b to 14d are assigned to the base station 14a, base stations 14a and 14c are assigned to the base station 14b, and base stations 14a, 14b and 14d are assigned to the base station 14d. On the other hand, the base stations 14a and 14c are adjacent to each other, and the table T is updated based on these relationships.

  The adjacent information registration unit 28 transmits the difference information when the table T in FIG. 4B is updated to the table T in FIG. 5B (step S6). In other words, the base station 14a and 14c are transmitted with the addition of the base station 14d as adjacent information, and the base station 14d is transmitted with the base stations 14a and 14c as adjacent information. The adjacency specifying unit 26 does not transmit the difference information to the base station 14b because the adjacency information is not updated.

  The base stations 14a, 14c, and 14d receive the adjacency information and, when registered, transmit a message indicating the completion of registration to the EMS 22 (step S7).

  In the WiMAX communication system 10, when a base station 14d that is a new base station is added to the base stations 14a to 14c that are existing base stations, the WiMAX communication system 10 has an adjacency relationship based on position information of the base station 14d. By specifying the base stations 14a and 14c, it is possible to easily register adjacent information to the base stations 14a and 14c.

  It should be noted that the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

  For example, in the above embodiment, one ASNGW 16d has been described as a newly added base station. However, when a plurality of new base stations are added, neighboring information is registered for the new base station. can do.

  Further, the adjacent information registration unit 28 transmits the difference information when the table T is updated as the adjacent information to the base stations 14a and 14c, but the adjacent information recorded in the table T is transmitted to the base station 14a, 14c may be transmitted and registered, or may be transmitted and registered to the base station 14b that is not adjacent to the base station 14d.

  Further, in the above embodiment, the adjacency information is registered when the base station 14d is added, but the adjacency information is recorded when the recorded contents of the table T are different before and after the acquisition of the position information of the base stations 14a to 14c. May be registered. In such a case, steps S1 and S2 are omitted, and the process starts from step S3. In step S5, the adjacency specifying unit 26 compares the table T before acquiring position information with the table T after acquiring position information. When the recorded contents are different, the adjacent information registration unit 28 may transmit and register adjacent information to the base stations 14a to 14c. Further, when the recorded contents are different, adjacent information may be transmitted and registered only to different target base stations. Here, if the recorded contents are different, the base station installation position may have been changed or removed, and neighbor information may be updated easily in accordance with such a base station change / removal. Can do.

DESCRIPTION OF SYMBOLS 10 ... WiMAX communication system 12 ... Terminal 14 ... Base station 16 ... ASNGW
18 ... ASN
20 ... CSN
22 ... EMS
24 ... Base station information acquisition unit 26 ... Adjacent relationship specifying unit 28 ... Adjacent information registration unit T ... Table

Claims (4)

An EMS that manages operations of a plurality of base stations that are wirelessly connected to a terminal,
Obtain location information of each base station,
Identifying the base stations that are adjacent to each other based on the location information;
EMS, wherein neighbor information is registered in each base station. In the EMS of claim 1,
For each base station, when a new base station is added, the location information of the new base station is acquired,
Based on the location information, identify the base station that is adjacent to the new base station,
The EMS, wherein adjacent information of the new base station is registered in each base station. In the EMS of claim 2,
The EMS, wherein the neighbor information of the new base station is registered with respect to the base station in an adjacency relationship. In EMS of any one of Claims 1-3,
Obtain the transmission output information of the new base station,
The EMS, wherein the adjacency relationship is determined based on the position information and the transmission output information.