Base station device, identifier managing device and identifier assigning method

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a base station device, an identifier management device, and an identifier assignment method used in a digital wireless communication system.

【0002】

[Conventional technology]

A communication network is identified in a digital wireless communication system including a plurality of base station devices (hereinafter, simply referred to as "base stations") that perform wireless communication with at least one communication terminal device. The identification of this communication network is performed in the following cases, for example. (1) When checking whether the network can be connected after turning on the power of the communication terminal and before starting communication with the base station (AP) before authentication (during so-called association). (2) When collating the connected company or supported services at the time of handover.

【0003】

The communication network is identified by a network identifier (for example, network ID, hereinafter abbreviated as NET-ID). A few bits of BCCH (Broadcast Control CHannel) are used for this NET-ID. This NET-ID is assigned to each communication network so that the communication network can be identified.

【0004】

Generally, 10 bits of BCCH are used for NET-ID, which enables identification of 1024 types of communication networks. In addition, this NET-ID is determined by random numbers when the communication network is installed.

【0005】

Determining the NET-ID by random numbers has the advantage that it can be used immediately after installing the base station, and the NET-ID is determined for the base station used in the network for home or small office LAN. Suitable as a method.

【0006】

[Problems to be Solved by the Invention]

However, if the NET-ID is determined by a random number, there is a risk that the NET-ID will collide in the adjacent network. Then, when the NET-IDs collide, there is a problem that the communication terminal device existing in the area of the network cannot identify the network and causes interference.

【0007】

The present invention has been made in view of such a point, and an object of the present invention is to provide a base station device, an identifier management device, and an identifier assignment method capable of preventing NET-ID collisions in adjacent networks. ..

【0008】

[Means for solving problems]

The base station device of the present invention includes an identifier requesting means for requesting an identifier management device to assign a network identifier, and an identifier setting means for setting a network identifier assigned from the identifier management device as a network identifier of its own station. Take the composition.

【0009】

Further, the identifier management device of the present invention selects one from the identifier search means for searching an unused network identifier and the searched network identifier when the base station device requests the allocation of a network identifier. Therefore, a configuration including an identifier selection means for notifying the base station apparatus is adopted.

【0010】

Further, the identifier management device of the present invention has an identifier management table in which a communication network and a network identifier are associated with each other, and the identifier search means searches for an unused network identifier based on the contents of the identifier management table. To take.

【0011】

With these configurations, the network identifier can be centrally managed by the identifier management device, and the network identifier can be assigned to each base station device, so that it is possible to prevent the network identifier from colliding with each other.

【0012】

Further, the identifier search means of the identifier management device of the present invention adopts a configuration for searching an unused network identifier from a preset selectable network identifier area.

【0013】

Further, the base station apparatus of the present invention adopts a configuration in which the user arbitrarily selects the network identifier of the own station from the preset selectable network identifier area.

【0014】

With these configurations, even when a network in which the network identifier of the own station is determined by a random number and a network in which the network identifier assigned by the identifier management device is used as the network identifier of the own station are mixed, the network of another communication network. Network identifiers can be assigned so that they do not conflict with the identifier.

【0015】

Further, the base station apparatus of the present invention is preset as a network identifier of its own station based on a search means for investigating the network identifier of an existing base station apparatus having overlapping service areas of a communication network and the investigation result of this search means. A configuration is adopted in which a network identifier area that is not used in the existing base station apparatus is selected from the selectable network identifier areas.

【0016】

With this configuration, in addition to the network in which the network identifier of the own station is determined by a random number and the network in which the network identifier assigned by the identifier management device is used as the network identifier of the own station, the network identifier of the peripheral network is investigated and autonomous. Even when networks that determine the network identifier of the own station coexist, the network identifier can be assigned so as not to collide with the network identifier of another communication network.

【0017】

Further, in the identifier assignment method of the present invention, the identifier management device is made to select one of unused network identifiers based on the network identifier allocation request from the base station device, and the selected network identifier is selected as the base. The method of using the network identifier of the station device is adopted.

【0018】

By this method, the network identifier can be centrally managed by the identifier management device, and the network identifier can be assigned to each base station device, so that it is possible to prevent the network identifier from colliding with each other.

【0019】

Further, the identifier assignment method of the present invention classifies the entire network identifier into a first network identifier group that can be arbitrarily set by the user and a second network identifier group that can be selected by the identifier management device, and manages the identifier. A method is adopted in which the network identifiers that can be selected by the device are unused in the second network identifier group.

【0020】

With this configuration, even when a network in which the network identifier of the own station is determined by a random number and a network in which the network identifier assigned by the identifier management device is used as the network identifier of the own station are mixed, the network identifier of another communication network is used. You can assign a network identifier so that it does not conflict with.

【0021】

Further, the identifier assignment method of the present invention classifies the entire network identifier into a first network identifier group, a second network identifier group, and a third network identifier group, and autonomously determines the network identifier in use by the peripheral base station apparatus. A method is adopted in which a base station device that can be specifically investigated is made to select one of the unused network identifiers from the third network identifier group based on the investigation result and set as the network identifier of its own station.

【0022】

By this method, in addition to the network in which the network identifier of the own station is determined by a random number and the network in which the network identifier assigned by the identifier management device is used as the network identifier of the own station, the network identifier of the peripheral network is investigated and autonomous. Even when networks that determine the network identifier of the own station coexist, the network identifier can be assigned so as not to collide with the network identifier of another communication network.

【0023】

BEST MODE FOR CARRYING OUT THE INVENTION

The gist of the present invention is to centrally manage network identifiers with an identifier management device and assign network identifiers to each base station device.

【0024】

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

【0025】

(Embodiment 1) FIG. 1 is a system configuration diagram including a base station and a NET-ID management device according to the first embodiment of the present invention.

【0026】

Base stations 100A to 100X are installed in the center of each network, and communication terminal devices existing in the network communicate with the base stations of the network.

【0027】

An individual NET-ID is assigned to each network, and the NET-ID is centrally managed by the NET-ID management device 200.

【0028】

When a new communication network is installed and the base station is powered on, the newly installed base station first transmits a NET-ID request signal to the NET-ID management device 200.

【0029】

When the NET-ID management device 200 receives the NET-ID request signal from the newly installed base station, the NET-ID management device 200 searches for an unused NET-ID and arbitrarily selects one from the searched NET-IDs. Assigned as the NET-ID of the new base station, and the assigned NET-ID is transmitted to the new base station.

【0030】

FIG. 2 is a block diagram showing a configuration of a base station according to the first embodiment of the present invention. The communication network in the following description shall include an in-house LAN, various wireless communication systems, and the like.

【0031】

In the base station shown in FIG. 2, the signal transmitted from the communication partner is received by the antenna 101 and sent to the wireless receiver 102. The wireless receiver 102 performs amplification (gain control), down-conversion, and A / D conversion processing on the received signal. The signal output from the wireless reception unit 102 is demodulated by the demodulation unit 103, and the received data is taken out.

【0032】

The demodulated signal is output to the NET-ID setting unit 104, and the NET-ID setting unit 104 extracts the NET-ID information included in the signal and uses NET as the NET-ID assigned to the own station. -Written to ID table 105.

【0033】

On the other hand, the transmission data is frame-configured by the frame configuration unit 106, and the NET-ID written in the NET-ID table 105 is inserted as needed, and after being modulated by the modulation unit 107, the radio is transmitted. It is sent to the transmitter 108. The radio transmission unit 108 performs D / A conversion, up-conversion, and amplification (gain control) processing on the modulated signal. The signal output from the wireless transmitter 108 is wirelessly transmitted from the antenna 101.

【0034】

In addition, when a new communication network is installed and the power is turned on to the newly installed base station, the NET-ID request signal is transmitted to the NET-ID management device by a route different from the above-mentioned normal transmission data. ..

【0035】

In the case of FIG. 2, the NET-ID request signal created by the NET-ID request unit 109 is modulated by the modulation unit 110 and then sent to the wireless transmission unit 111. The radio transmission unit 111 performs D / A conversion, up-conversion, and amplification (gain control) processing on the modulated signal. The signal output from the wireless transmitter 111 is wirelessly transmitted from the antenna 112.

【0036】

FIG. 3 is a block diagram showing a configuration of the NET-ID management device according to the first embodiment of the present invention.

【0037】

In the NET-ID management device shown in FIG. 3, the radio signal of the NET-ID request signal transmitted from the newly installed base station is received by the antenna 201 and sent to the radio receiving unit 202. The wireless receiver 202 performs amplification (gain control), down-conversion, and A / D conversion processing on the received signal. The signal output from the wireless reception unit 202 is demodulated by the demodulation unit 203, the NET-ID request signal is extracted, and the signal is output to the NET-ID search unit 204.

【0038】

Then, the NET-ID search unit 204 searches for an unused NET-ID from the NET-IDs registered in the NET-ID management table 205, and the NET-ID selection unit 206 searches for an unused NET-ID. One of the NET-IDs is arbitrarily selected and assigned as the NET-ID of the new base station.

【0039】

The assigned NET-ID is frame-configured by the frame configuration unit 207, modulated by the modulation unit 208, and then sent to the radio transmission unit 209. The radio transmitter 209 performs D / A conversion, up-conversion, and amplification (gain control) processing on the modulated signal. The signal output from the wireless transmission unit 209 is wirelessly transmitted from the antenna 201 to the new base station.

【0040】

FIG. 4 is a schematic diagram of the NET-ID management table of the NET-ID management device according to the first embodiment of the present invention.

【0041】

As shown in Fig. 4, the network name currently assigned to each NET-ID is registered in the NET-ID management table.

【0042】

For example, as shown in Fig. 4 (a), network A is currently assigned NET-ID "0", network B is assigned NET-ID "3", and network X base station assigns NET-ID. Suppose a request signal is transmitted.

【0043】

In this case, the NET-ID search unit 204 of the NET-ID management device searches for an unused NET-ID, and the NET-ID selection unit 206 is one of the searched unused NET-IDs ( For example, select NET-ID "6"), send the selected NET-ID from antenna 201 to the new base station, and as shown in Fig. 4 (b), the corresponding part of the NET-ID management table. (In this example, the assignment of NET-ID "6" is updated from "not" to "X").

【0044】

In this way, the NET-ID management device centrally manages the NET-ID and assigns the NET-ID to each base station, so that it is possible to prevent the NET-ID from colliding with each other in the communication network. ..

【0045】

In the above description, a mode in which the NET-ID request signal is wirelessly transmitted by a route different from the normal transmission data has been described, but the present invention is not limited to this, and the NET-ID management device is a network. If it exists within the range, the NET-ID request signal can be wirelessly transmitted by the same route as the normal transmission data.

【0046】

In addition, the NET-ID allocation request and the NET-ID setting can be made manually. In this case, since it is not necessary to request the allocation of the NET-ID and to provide a special mechanism for setting the NET-ID, the device can be simplified.

【0047】

Further, the NET-ID acquired by the newly installed base station from the NET-ID management device may be acquired by the wired communication network or the wireless communication network.

【0048】

(Embodiment 2) In the second embodiment, the network that determines the NET-ID of the own station by random numbers (hereinafter referred to as "random number network") and the NET-ID assigned by the NET-ID management device are used for the own station. This is a form that prevents the NET-ID of the management network from colliding with other networks when the networks used as NET-IDs (hereinafter referred to as "management networks") coexist.

【0049】

FIG. 5 is a system configuration diagram including the base station and the NET-ID management device according to the second embodiment of the present invention.

【0050】

In FIG. 5, it is assumed that the networks Ra to Rc are random number (Random) networks and the networks Ca to Cc are control networks.

【0051】

As described above, determining the NET-ID of the own station by random numbers is useful for networks for home use and in-house LANs in small offices because of its simplicity, and in the future, random number networks and management networks will coexist. The situation is expected to occur.

【0052】

In this case, the NET-ID management device cannot manage the NET-ID of the random number network, so if the NET-ID allocation is not restricted at all, there is a risk that the NET-ID of the management network will collide. is there.

【0053】

Therefore, as shown in FIG. 6, the NET-ID area that can be used in the random number network (hereinafter, referred to as "random number network area") and the NET-ID area that can be used in the management network (hereinafter, "management network area"). ) And are separated.

【0054】

Then, the user of the random number network promises to select his / her own NET-ID from the random number network area, and when the NET-ID management device receives the NET-ID request signal from the newly established base station, the management network Search for an unused NET-ID in the area, select one of them, and send it to the new base station.

【0055】

As a result, even when the random number network and the management network coexist, it is possible to prevent the NET-ID of the management network from colliding with other networks.

【0056】

In the present embodiment, the base station of the random number network may be provided with a component portion that rejects the setting when a NET-ID other than the random number network area is selected as the NET-ID of the own station. ..

【0057】

(Embodiment 3) When temporarily installing a private network of a certain size at a construction site, etc., it is used autonomously in the surrounding area rather than requesting the NET-ID from the NET-ID management device. It may be easier to investigate the NET-ID that is being used and select your own NET-ID.

【0058】

In the third embodiment, in addition to the random number network and the management network, a network that investigates the NET-ID of the peripheral network and autonomously determines the NET-ID of its own station so as not to collide with other networks (hereinafter, This is a form that prevents the NET-ID of the management network from colliding with other networks when (called "autonomous networks") are mixed.

【0059】

FIG. 7 is a system configuration diagram including the base station and the NET-ID management device according to the third embodiment of the present invention.

【0060】

In FIG. 7, it is assumed that the networks Ra to Rc are random number (Random) networks, the networks Ca to Cc are control networks, and the networks Sa to Sc are self-control networks.

【0061】

In the case of the present embodiment, as shown in FIG. 8, the random number network area, the management network area, and the NET-ID area that can be used in the autonomous network (hereinafter, referred to as autonomous network area) are separated.

【0062】

Then, the user of the random number network promises to select his / her own NET-ID from the random number network area, and when the NET-ID management device receives the NET-ID request signal from the newly established base station, the management network Search for an unused NET-ID in the area, select one of them, and send it to the new base station.

【0063】

In addition, the newly installed base station of the autonomous network investigates the NET-ID of the surrounding base stations, searches for unused ones in the autonomous network area, selects one from them, and selects itself. Register as the station's NET-ID.

【0064】

Specifically, when a new autonomous network is installed, the new base station first outputs a notification request signal to the existing base station to notify the contents of the NET-ID table. ..

【0065】

When the newly established base station and the base station whose service area overlaps receive the notification request signal, the base station notifies the table contents of its own NET-ID by BCCH. Normally, the existing base station notifies the base station number by BCCH.

【0066】

The newly established base station searches for unused ones in the autonomous network area based on the received base station numbers of other stations and the table contents of NET-ID, selects one from them, and owns the station. Register in the NET-ID table as the NET-ID of.

【0067】

This makes it possible to prevent the NET-ID of the management network from colliding with other networks even when the random number network, the autonomous network, and the management network coexist.

【0068】

[Effect of the invention]

As described above, according to the base station, the identifier management device, and the identifier assignment method of the present invention, it is possible to prevent the NET-ID of the network from colliding with other networks.

[Simple explanation of drawings]

[Figure 1]

System configuration diagram including the base station and the NET-ID management device according to the first embodiment of the present invention. [Figure 2]

Block diagram showing the configuration of the base station according to the above embodiment [Fig. 3]

A block diagram showing the configuration of the NET-ID management device according to the above embodiment. [Fig. 4]

Schematic diagram of the NET-ID management table of the NET-ID management device according to the above embodiment. [Fig. 5]

System configuration diagram including the base station and the NET-ID management device according to the second embodiment of the present invention. [Fig. 6]

The figure for demonstrating the NET-ID allocation method which concerns on the said Embodiment [Fig. 7]

System configuration diagram including the base station and the NET-ID management device according to the third embodiment of the present invention. [Fig. 8]

The figure for demonstrating the NET-ID allocation method which concerns on the said Embodiment [Explanation of symbols]

100 base station equipment 200 NET-ID management device 101, 201 antenna 102, 202 wireless receiver 103, 203 Demodulator 104 NET-ID table 105 NET-ID setting section 106, 207 Frame components 107, 208 Modulator 108, 209 Wireless transmitter 204 NET-ID search section 205 NET-ID management table 206 NET-ID selection section