WO2005125249A1 - 自律的セル形成方法 - Google Patents
自律的セル形成方法 Download PDFInfo
- Publication number
- WO2005125249A1 WO2005125249A1 PCT/JP2004/008926 JP2004008926W WO2005125249A1 WO 2005125249 A1 WO2005125249 A1 WO 2005125249A1 JP 2004008926 W JP2004008926 W JP 2004008926W WO 2005125249 A1 WO2005125249 A1 WO 2005125249A1
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- WO
- WIPO (PCT)
- Prior art keywords
- base station
- information
- address
- cell
- setting information
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
- H04W8/265—Network addressing or numbering for mobility support for initial activation of new user
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to an autonomous cell forming method for autonomously determining a transmission power and a radio frequency of a self-station, and more particularly, to an autonomous cell that can be executed even in a communication environment having poor reception sensitivity. It relates to a forming method. Background art
- the base station measures the reception level of the pilot channel transmitted from the neighboring base station and reports the transmission power value of the pilot channel on the broadcast channel.
- the newly installed base station determines the neighboring cell location information (the distance to the neighboring base station and the neighboring cells) from the reception level value of the pilot channel of the neighboring base station and the transmission power value notified by the broadcast signal. Is calculated. Then, based on the arrangement information of the neighboring cells, the transmission power value is determined so that the cellier of the own station reaches the boundary of the neighboring cells, and a cell is formed.
- the neighboring cell location information the distance to the neighboring base station and the neighboring cells
- the present invention has been made in view of the above, and has been achieved without using information on radio waves.
- An object of the present invention is to obtain an autonomous cell formation method for performing autonomous cell formation based on collected cell formation information.
- An autonomous cell forming method is an autonomous cell forming method for a radio base station to autonomously determine a radio frequency and a transmission power, the radio base station being newly installed.
- Cell information that contains on-demand cell setting information including location information, transmission power information, and radio frequency information of base stations (peripheral base stations) around the installation location without using radio wave information
- cell setting information of wireless base stations installed in the vicinity is autonomously collected on demand without using information on radio waves, and transmission power and frequency of the own station are autonomously collected. decide. Brief Description of Drawings
- FIG. 1 is a diagram showing a network configuration for realizing an autonomous cell forming method according to the present invention
- FIG. 2 is a flowchart showing an autonomous cell forming method according to the first embodiment
- FIG. 3 is a diagram showing a relationship between location information and an IP address
- FIG. 4 is a diagram showing an example of a configuration of an IP address
- FIG. 5 is a diagram showing a configuration example of an IP address.
- FIG. 6 is a flowchart showing a process in which a newly installed wireless base station determines its own cell setting information
- FIG. 7 is a flowchart showing an autonomous cell forming method according to the second embodiment
- FIG. 8 is a flowchart showing an autonomous cell forming method according to the third embodiment
- FIG. 9 is a diagram showing a network configuration for realizing the autonomous cell forming method according to the present invention.
- FIG. 10 shows an autonomous cell type according to the fourth embodiment.
- FIG. 11 is a flowchart showing a configuration example of an IP address
- FIG. 12 is a flowchart showing cell setting information to a maintenance device.
- FIG. 2 is a flowchart showing a process of graphically displaying the image.
- Embodiment 1 Embodiment 1.
- FIG. 1 is a diagram showing a network configuration for realizing an autonomous cell forming method according to the present invention.
- This network consists of wireless base stations 1, 2, and 3, a router device 4 with a router function, a center device 5 that manages the IP address of each wireless base station, and a maintenance device 6 that is maintained by a network maintainer. It is configured.
- 1 a ,. 2 a, 3 a represent the cell areas of the radio base stations 1, 2, 3 respectively
- lb, 1 c, I d, le, 1 f, lg represent the cell area 1 a Represents a sector area divided into six.
- the wireless base station 1 has an antenna having directivity, and is capable of adjusting radio waves to each of the sectors lb to 1g. Note that the radio base stations 2 and 3 may have directional antennas similarly.
- FIG. 2 is a flowchart showing an autonomous cell forming method according to the first embodiment.
- the wireless base stations 2 and 3 have already been installed and are connected to the center unit 5 via the router device 4, and that the cells 2a and 3a have been formed.
- a description will be given of a case where a new radio base station 1 is installed and a cell 1a is formed.
- each wireless base station communicates with each wireless base station and the center device 5 via the router device 4.
- the wireless base station 1 After being installed at an arbitrary location (step S1 in FIG. 1), the wireless base station 1 obtains the location information such as the latitude and longitude of the installation location of the own station, and a method for specifying the location of the GPS. (Step S 2). This location information may be set directly by the installer in the wireless base station without using the GPS or the like.
- the wireless base station 1 puts the collected location information of its own station location, An IP address is requested from the center device 5 (step S3).
- the IP address of the center device 5 may be set in the wireless base station 1 in advance, or B
- the IP address may be obtained automatically using a protocol such as 0 ot p.
- the center device 5 that has received the IP address request performs an IP address assignment process for the wireless base station 1 based on the position information of the wireless base station 1 (step S4).
- a method of assigning an IP address in the center device 5 will be described with reference to FIGS. 3, 4, and 5.
- FIG. Fig. 3 is a diagram showing the relationship between location information and IP address, and shows area A, area B, area C, and area D where a certain area is divided by latitude and longitude. In the present embodiment, as an example, a case is described in which a newly installed wireless base station 1 is set to area A. 4 and 5
- FIG. 3 is a diagram illustrating a configuration example of a 1P address.
- the address system of IpV6 is used.
- 128-bit information can be divided into 8-bit units and represented as 16 integers (AP in the figure) (see Fig. 4).
- 16 pieces of integers of the IP address, information for specifying an error by a gap, and information indicating a serial number of a wireless base station in the area are further described.
- two pieces of information indicated by the lower 16 bits are area information and a base station serial number (see Fig. 5). It is assumed that the same value is assigned to the radio base station installed in the area as the area information value.
- the wireless base station 1 is installed in any of the areas shown in FIG. Judge whether or not.
- the installation location of the wireless base station 1 is determined to be, for example, the area A
- the address information for specifying the area A is set to the area information shown in FIG.
- the center device 5 updates the base station serial number from the number of base stations already set in area A, sets the base station serial number for the wireless base station 1 to the base station serial number in FIG.
- the center device 5 transmits the IP address to the wireless base station 1, and the wireless base station 1 registers the received IP address in its own station.
- the wireless base station 1 detects an IP address of a wireless base station (peripheral base station) installed around the own station (step S5).
- a method of detecting the IP address of the peripheral base station will be specifically described. Since the area information set to the IP address of the peripheral base station installed in the same area is common, the base station serial number of the IP address assigned to its own station is changed to the IP address of the peripheral base station. It becomes an address. Therefore, the wireless base station 1 uses the base station serial number of the IP address assigned from the center device 5, for example, the IP address assigned with 0 to 255, the value of the deviation, or the IP address of the neighboring base station. Regarded as an address. In the present embodiment, the base station serial number is 8 bits, and is determined as the maximum value that can be expressed by 8 bits.
- the wireless base station 1 requests cell setting information to the address of the detected peripheral base station (step S6).
- the cell setting information includes location information, transmission power information, and radio frequency information. After making the request, the wireless base station 1 starts a timer and waits for a response to information from the peripheral base station.
- the radio base birds 2 and 3 requested for the cell setting information return their own cell setting information to the radio base station 1 (step S7).
- the radio base station 1 receives the cell setting information from the peripheral base station while the timer is running, and determines the cell setting information of its own station based on the cell setting information of the peripheral base station after a timeout (Ste S8).
- FIG. 6 is a flowchart showing a process in which the newly installed wireless base station 1 determines its own cell setting information.
- the determination processing of the cell setting information will be specifically described according to the flowchart of FIG.
- the wireless base station 1 reads a determination range (distance from the own base station) for determining how far to refer to the wireless base station from the own base station when determining the cell setting information (step S1). S 1 1).
- the information indicating the determination range may be set in advance by the installer before installing the wireless base station, or may be obtained from the center device 5 when requesting an IP address.
- the cell setting information of the wireless base station included in the determination range is picked up from the cell setting information of the peripheral base station (step S12). And Based on the position information and the transmission power information of the cell setting information that has been picked up, the transmission power value of the own station is determined so that the radio range of the own station is in contact with the radio range of the neighboring base station (step S13) .
- the radio base station 1 determines the transmission power value of the sector 1b based on the location information of the neighboring base stations with reference to the transmission power information of the radio base station 2, and determines the transmission power value of the sector 1g. The transmission power value is determined with reference to the transmission power information of the radio base station 3. For the other sectors 1c, Id, le, 1 ⁇ ⁇ ⁇ , the maximum transmission power value that the radio base station 1 can transmit is set because there are no neighboring base stations.
- the radio base station 1 determines its own frequency information based on the frequency information of the picked up neighboring cell setting information (step S14).
- the method of determining the frequency differs depending on the wireless communication method adopted by the wireless base station 1. For example, in the case of a system such as PHS that cannot use the same frequency as the neighboring base station, the frequency is determined to be different from the frequency information of the neighboring cell setting information. Also, in the case of a system that can use the same frequency as the peripheral base station, such as W—CDMA, the frequency of the own station is selected arbitrarily.
- cell setting information of wireless base stations installed in the vicinity is autonomously collected on demand without using information on radio waves.
- the transmission power and frequency of the own station can be determined autonomously irrespective of the radio wave condition.
- FIG. 7 is a flowchart showing an autonomous cell forming method according to the second embodiment.
- the network configuration for realizing the autonomous cell forming method of the present embodiment is the same as that of FIG. 1 of the first embodiment. Here, only the processing different from the first embodiment will be described.
- the wireless base stations 2 and 3 that have already been installed notify the center one device 5 of their own senoré setting information (step S21).
- the center device 5 registers the notified cell setting information in its own device (step S22).
- the wireless base station 1 registers the received IP address of the own station by the same processing as in the first embodiment described above (steps S 1 -S Four ).
- the wireless base station 1 notifies the center unit 5 of the determination range of the own station (similar to the first embodiment) and requests the cell setting information of the peripheral base station (step S23). After receiving the request, the center device 5 returns cell setting information of the peripheral base stations of the wireless base station 1 based on the position information of the wireless base station 1 and the determination range (Step S24).
- the wireless base station 1 determines the cell setting information of the own station based on the collected cell setting information by the same processing as in the first embodiment (step S8).
- cell setting information of wireless base stations installed in the vicinity is collectively collected from the center device.
- transmission power information and frequency information of the own station can be determined autonomously regardless of the radio wave condition.
- FIG. 8 is a flowchart showing an autonomous cell forming method according to Embodiment 3, for example, after the radio base station 1 determines its own cell setting information in the processing of Embodiment 1 or 2 described above. The processing will be described.
- the network configuration for realizing the autonomous cell forming method according to the first embodiment is the same as that in FIG. 1.1 of the first embodiment. Here, only the processing different from the above-described first or second embodiment will be described. '
- step S31 the wireless base station 2 or 3 already installed needs to change its own transmission power and frequency for some reason (step S31).
- the wireless base station will The cell setting information is notified to the surrounding wireless base station 1 or center device 5 (step S32).
- the center device 5 notified of the cell setting information registers the information in its own station (step S22). In addition, the neighboring wireless base station 1 And updates the cell setting information of the own station (step S8).
- the radio base station is in operation, that is, the cell setting process of the radio base station configuring the system is determined.
- the cell setting information is notified to the base station of the radio base station.
- the neighboring base stations notified of the cell setting information can autonomously update the transmission power information and the frequency information.
- the autonomous cell forming method based on the cell setting information collected at the time of installing and operating the wireless base station has been described.
- the case where the wireless base stations are installed hierarchically is described. An autonomous cell formation method will be described.
- FIG. 9 is a diagram showing a network configuration for realizing the autonomous cell forming method according to the present invention, and includes radio base stations 11 to 16.
- Numerals 11a to 14a indicate cell areas formed by the line base stations 11 to 14.
- Reference numeral 15a denotes a cell area formed by the #Men base station 15, which has a hierarchical structure that overlaps with the cell areas 11a and 12a.
- 16a indicates a senole area formed by the radio base station 16 and has a hierarchical structure that overlaps with the cell areas 13a and 14a.
- FIG. 10 is a flowchart showing an autonomous cell forming method according to the fourth embodiment.
- the wireless base stations 11 to 14 and 16 have already been installed, and in this state, a case where a new wireless base station 15 is installed and a cell 15a is formed will be described. I do.
- only processing different from the above-described embodiments will be described.
- the newly installed wireless base station 15 collects its own location information by the same processing as in the first embodiment (steps Sl and 2).
- the wireless base station 15 puts its own location information, Then, an IP address is requested to the center device 5 (not shown) (step S41).
- this layer is called cell # 1 for base stations # 1 to # 14, layer # 1 for radio base stations 11 to 14, and layer # 2 for radio base stations 15 and 16. Are shown.
- the layer number is set by the installer in the internal memory of the wireless base station 15 when the wireless base station 15 is installed.
- the center device 5 that has received the request for the IP address sets the area information and the base station serial number based on the location information of the wireless base station 15, and further, based on the hierarchy number, as shown in FIG. By setting the layer number information, an IP address assignment process is performed (step S42).
- FIG. 11 is a diagram showing a configuration example of an IP address, and shows, as an example, area information, a hierarchy number, and a base station serial number.
- the wireless base station 15 to which the IP address has been assigned detects the IP address of the peripheral base station from the IP address (step S43).
- area information and a layer number are common, and IP addresses with different base station serial numbers are targeted for peripheral base stations.
- the base stations around the base station 15 are the base stations 16.
- the wireless base station 15 requests cell setting information in the same processing as in the above-described first embodiment, and then determines its own cell setting information (steps S6 to S8).
- the cell setting information of the peripheral base station may be collected from the center device 5 by the same processing as in the second embodiment.
- cell setting information of wireless base stations positioned in the same hierarchy is collected from wireless base stations installed in the vicinity.
- the transmission power and frequency of the own station can be determined autonomously, and furthermore, an arbitrary number of hierarchies can be formed.
- the network configuration of the present embodiment is the same as that of FIG. This is the same as FIG. 9 of the fourth embodiment (the router device 4, the center device 5, and the maintenance device 6 are arranged in the same manner as in FIG. 1).
- the processing different from the above-described first or second embodiment will be described.
- FIG. 12 is a flowchart showing a process of graphically displaying the cell setting information on the maintenance device.
- the maintenance device 6 sets the position information of an area whose cell arrangement status is to be known (step S51). Then, the maintenance device 6 in which the position information is set performs the processing of the above-described steps S3 to S7, and collects the cell setting information of the base station around the above-mentioned area (steps S3 to S7). .
- the maintenance device 6 uses, for example, a circle whose center is the position of each radio base station and whose radio range is the radius based on the transmission power information (Fig. 1, Fig. 1). Is displayed on the screen as the cell installation status around the set area (step S52).
- the autonomous cell forming method according to the present invention is useful as a technique for autonomously determining the transmission power and the radio frequency of the own station, and particularly, the reception sensitivity between base stations is poor. It is suitable as an autonomous cell formation method that can be executed even in a communication environment.
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Abstract
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04746395A EP1758414A4 (en) | 2004-06-18 | 2004-06-18 | AUTONOMOUS METHOD OF CELL FORMATION |
JP2006514644A JP4437817B2 (ja) | 2004-06-18 | 2004-06-18 | 自律的セル形成方法 |
PCT/JP2004/008926 WO2005125249A1 (ja) | 2004-06-18 | 2004-06-18 | 自律的セル形成方法 |
CN2004800431149A CN1954629B (zh) | 2004-06-18 | 2004-06-18 | 自主小区形成方法 |
US11/578,700 US7885651B2 (en) | 2004-06-18 | 2004-06-18 | Autonomous cell shaping method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/008926 WO2005125249A1 (ja) | 2004-06-18 | 2004-06-18 | 自律的セル形成方法 |
Publications (1)
Publication Number | Publication Date |
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WO2005125249A1 true WO2005125249A1 (ja) | 2005-12-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/008926 WO2005125249A1 (ja) | 2004-06-18 | 2004-06-18 | 自律的セル形成方法 |
Country Status (5)
Country | Link |
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US (1) | US7885651B2 (ja) |
EP (1) | EP1758414A4 (ja) |
JP (1) | JP4437817B2 (ja) |
CN (1) | CN1954629B (ja) |
WO (1) | WO2005125249A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CN1954629B (zh) | 2010-05-12 |
JPWO2005125249A1 (ja) | 2008-04-17 |
EP1758414A1 (en) | 2007-02-28 |
US7885651B2 (en) | 2011-02-08 |
EP1758414A4 (en) | 2009-08-12 |
US20070173259A1 (en) | 2007-07-26 |
CN1954629A (zh) | 2007-04-25 |
JP4437817B2 (ja) | 2010-03-24 |
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