JP2009164912A - Base station device and method of controlling the same - Google Patents

Base station device and method of controlling the same Download PDF

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Publication number
JP2009164912A
JP2009164912A JP2008000790A JP2008000790A JP2009164912A JP 2009164912 A JP2009164912 A JP 2009164912A JP 2008000790 A JP2008000790 A JP 2008000790A JP 2008000790 A JP2008000790 A JP 2008000790A JP 2009164912 A JP2009164912 A JP 2009164912A
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Japan
Prior art keywords
unit
channel coding
base station
resource
central control
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JP2008000790A
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Japanese (ja)
Inventor
Tatsuya Higuchi
Takashi Nakagawa
Tomohiro Nakano
Hideki Owada
Yuji Shimoyama
Yoshio Takayanagi
Tetsuya Yatagai
裕司 下山
貴史 中川
智博 中野
英樹 大和田
達也 樋口
徹矢 谷田貝
良雄 高柳
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Nec Corp
日本電気株式会社
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Priority to JP2008000790A priority Critical patent/JP2009164912A/en
Publication of JP2009164912A publication Critical patent/JP2009164912A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a base station device which allocates resources according to the traffic conditions in the set environment. <P>SOLUTION: The base station device includes: a transmission line I/F1 which performs interfacing with a transmission line; a central control section 2 which is connected to the transmission line I/F1 and controls the entire base station device; at least one channel coding section 5 which is connected to the central control section 2 and is provided inside with a resource section; and a wireless section I/F4 which performs interfacing with a wireless section connected to the central control section 2 and the channel coding section 5. The central control section 2 traces the state of resources in the resource section for a predetermined period of time and, based on the tracing results, prepares backup resources and sets up a configuration of the channel coding section 5 which uses the backup resources as actually-used resources if needed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a base station apparatus that allocates resources according to traffic conditions in a base station environment and a control method therefor.

As a technique related to the present invention, there is one described in Patent Document 1. The device described in this document is intended to provide a wireless device that can improve a processing efficiency loss in executing a communication service such as a data storage service that handles voice, text data, and image data. This document describes that a data base station (wireless master unit) is provided with a statistical processing unit and a configuration management unit, and the most frequently used communication service resource function program is prepared in the user data processing unit. .
JP-A-8-23576

  However, the radio telephone apparatus described in the above document has room for improvement in the following points.

  That is, in the field of radio base stations, the resource allocation in the channel coding unit is usually fixed. Therefore, when the traffic and the usage environment are greatly deviated from the standard state, there are resources that cannot be used, which is disadvantageous in terms of effective use of hardware. Therefore, there has been a demand for a base station apparatus that can change the resource allocation according to the traffic conditions of the installed environment.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a base station apparatus that can change resource allocation according to traffic conditions of an installed environment.

  According to the present invention, a transmission path I / F that interfaces with a transmission path, a central control unit that is connected to the transmission path I / F and controls the entire base station apparatus, and is connected to the central control unit It has at least one channel coding unit provided with a resource unit therein, and a radio unit I / F that interfaces between the central control unit and a radio unit connected to the channel coding unit, the central control unit The resource state of the resource part is traced for a predetermined period, and a spare resource is prepared based on the traced result, and the channel coding part that uses the spare resource as a working resource is configured as necessary. A characteristic base station apparatus is provided.

  According to the present invention, there is also provided a control method for a base station apparatus, wherein the resource state of the resource unit in the channel coding unit of the base station apparatus is traced for a predetermined period by the resource management unit in the central control unit of the base station apparatus. Based on the traced result, a base station apparatus control method is provided by configuring a channel coding unit that prepares a spare resource in the channel coding unit and uses the spare resource as an active resource as necessary. Is done.

  ADVANTAGE OF THE INVENTION According to this invention, the base station apparatus which self can change allocation of a resource according to the traffic conditions of the installed environment can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

First Embodiment FIG. 1 is a functional block diagram of a base station apparatus according to the present embodiment. The base station apparatus includes a transmission path I / F 1 that interfaces with the transmission path, a central control unit 2 that is connected to the transmission path I / F 1 and controls the entire base station apparatus, and a central control unit 2 A radio unit I / F 4 that interfaces between at least one channel coding unit 5 that is connected and provided with a resource unit 14 therein, and a central control unit 2 and a radio unit (not shown) connected to the channel coding unit 5 The central control unit 2 traces the resource state of the resource unit 14 for a predetermined period, prepares a spare resource based on the traced result, and uses the spare resource as a working resource as necessary The channel coding unit 5 is configured.

  Next, details of the channel coding unit 5 are shown in FIG. The channel coding unit 5 includes a control unit 11 for controlling the entire channel coding unit 5, a switch unit 12 for transferring signals between the functions, an external I / F 13 for interfacing with the outside of the channel coding unit 5, And it is comprised from the some resource part 14-1 to 14-n which can be reconfigured by the instruction | indication from a control part.

  The function which shows the detailed structure of the central control part 2 is shown in FIG. The central control unit 2 is a control unit 21 for controlling the inside of the central control unit, a switch unit 22 for transferring signals between the respective units, an external I / F 23 for interfacing with the outside of the central control unit 2, and each channel coding The resource management unit 24 manages the resource usage state of the units 5-1 to 5-m, and the configuration management unit 25 manages the configuration state of each channel coding unit.

Next, the operation of the base station according to the embodiment of the present invention will be described in detail with reference to FIG. 1, FIG. 2, and FIG.
First, referring to FIG. 1, when the base station apparatus is started up, the central control unit 2 configures the channel coding units 5-1 to 5-m through a switch unit 3 with a predetermined file (specification). To enable each channel coding unit. Thereafter, a signal from a host device such as an exchange is input via the transmission line I / F 1 and separated into a data signal and a control signal by the central control unit 2. The central control unit 2 performs resource allocation based on the control signal and records and manages the resource allocation status. The data signal is coded by the channel coding units 5-1 to 5-m through the switch unit 3, and is transmitted from the radio unit I / F 4 to the radio unit through the switch unit 3 again. The central control unit 2 keeps track of the configuration status and resource usage status of the channel coding units 5-1 to 5-m in the device, and performs necessary reconfiguration according to the status of the device. Specific cases will be described later.

  Next, the operation of the channel coding unit 5 will be described in detail with reference to FIG. First, the channel coding unit 5 is given configuration conditions from the upper central control unit 2 via the external I / F 13 and the switch unit 12 when the function is started up, and is once interpreted by the control unit 11. Later, specific configuration information is given from the control unit 11 to the resource units 14-1 to 14-n via the switch unit 12, and each resource unit becomes effective. In particular, the configuration of each resource unit is not limited. For example, two resource units may be prepared in accordance with two types of processing such as hardware processing and software processing. The configuration conditions include, for example, a large amount of UL resources when the amount of data of Upper Link (hereinafter abbreviated as UL) is large, and a large amount of DL resources when the amount of data of Down Link (hereinafter abbreviated as DL) is large. Allocation is performed.

  The base station apparatus includes a transmission path I / F 1 that interfaces with the transmission path, a central control unit 2 that is connected to the transmission path I / F 1 and controls the entire base station apparatus, and a central control unit 2 It has at least one channel coding unit 5 that is connected and provided with a resource unit 14 inside, and a radio unit I / F 4 that interfaces between the central control unit 2 and the radio unit connected to the channel coding unit 5 The central control unit 2 traces the resource state of the resource unit 14 for a predetermined period, prepares a spare resource based on the traced result, and uses the spare resource as a working resource as needed. Configuration of unit 5 is performed.

This trace will be specifically described with reference to FIG. As described above, the central control unit 2 configures each channel coding unit 5 with the initial information when the apparatus is activated, and registers this state in the configuration management unit 25.
When the operation of the device starts, resources are allocated in accordance with call information from the terminal, and this state is stored in the resource management unit 24 for each channel coding unit. The state of excess or deficiency of resources is constantly monitored, and the configuration state of the channel coding unit 5 is changed in accordance with the call volume and the surplus resource situation, and the operation is continued or a warning or an alarm is generated. In addition, if the control unit 21 analyzes the past history stored in the resource management unit 24 and the configuration management unit 25 and finds a certain relationship between the time and the state, a schedule is created to change the time. It is also possible to actively change the configuration.

  Next, with reference to FIG. 4, the operation | movement in the case of actually operating the base station apparatus in embodiment is demonstrated concretely. In the case of this embodiment, the base station apparatus is installed in the basement, an antenna and a remote radio head (hereinafter abbreviated as RRH) are installed on each floor from the first floor to the sixth floor, and one floor is one cell. A 6-cell system to be constructed is constructed. Here, RRH is a small radio unit that is connected to the base station device (Node B) with an optical cable and is connected to an antenna installed in a place where it is difficult for radio waves in the building to reach and where the base station device is difficult to secure. is there. In this case, consider a case where the channel coding unit of the base station apparatus is composed of six active channel coding units and one spare channel coding unit.

  For example, as the traffic of each cell, cell 1 and cell 2 have offices, cell A's office A is mainly used for DL packet viewing, cell 2's office B is video distribution, etc. UL packet, etc. It is assumed that the main use, cell 3 to cell 6 are ordinary residences, and are mainly used for voice calls and short packet use.

  If the traffic information of each cell is available at the time of installation of the device, in accordance with the information, the active channel coding unit 5-1 having a channel coding function with a higher DL resource allocation ratio is allocated to the cell 1, Similarly, cell 2 is assigned a working channel coding unit 5-2 having a channel coding function with a higher UL resource allocation ratio, and cell 3 to cell 6 are channel coding functions with equal allocation of DL and UL resources. Are allocated to the current channel coding units 5-3 to 5-6.

  If there is no traffic information of each cell in advance, all the cells are configured as a channel coding unit for standard resource allocation, and operation is started. In either case, monitor the traffic of each cell after the start of operation, and if it is determined that the configuration at the initial setting is not optimal, apply the configuration that seems to be optimal to the spare channel coding unit and the corresponding working The channel coding unit is blocked and replaced with the spare channel coding unit.

  If there is a cell with very high traffic, a channel coding unit can be added instead of switching. At that time, if the spare channel coding unit is used and there is no spare state, the central control unit 2 can give a warning of no spare to the host, and the maintenance person who recognizes this will need to A channel coding unit can be added to the apparatus.

  On the contrary, if the traffic of the cells 3 to 6 is very low, for example, if the central control unit 2 determines that four cells can be handled by one active channel coding unit as a result of traffic monitoring, three channels Put the coding part in reserve and report this to the higher rank. The maintenance person who recognizes this can delete the channel coding unit from the apparatus as needed and pass it to another apparatus. In FIG. 4, the cell is indicated as Cell, the office is indicated as Office, and the base station device is indicated as Node-B.

An example of the operation method of the entire base station apparatus is shown in FIG. First, it is checked whether there is traffic information in advance when the central control unit is activated (S102). If there is traffic information (YES in S102), an optimum configuration file suitable for the traffic information is selected and constructed (S104). If there is no traffic information (S102 is NO), a standard configuration file is prepared (S106). Then, the configuration of the channel coding unit 5 and the registration to the configuration management unit 25 are performed using the prepared / constructed configuration file (S108).
When the operation of the apparatus starts, resources are allocated in accordance with the call information from the terminal (S110).
According to the calling state from the terminal, the resource excess / deficiency state is always monitored (S112).
Corresponding to the call volume and surplus resource status, no alarm is generated even in one channel coding unit (hereinafter referred to as channel unit block) (NO in S114), and the specific resource of the channel unit block is not insufficient (S116). Is NO), the process returns to the resource state monitoring (S112).
Corresponding to the call volume and surplus resource status, an alarm for the channel block is generated (YES in S114), and the configuration of the block in the alarm state is inquired (S118). Then, reconfiguration (S120) with the same contents to the spare channel block is performed, and operation switching to the spare channel block is performed (S122).
Corresponding to the call volume and surplus resource status, the channel block alarm does not occur (NO in S114), there is a shortage of specific resources in the channel block (S116 is YES), and there is a surplus in another resource of the channel block If there is any (YES in S124), the resource allocation to the spare channel block is reviewed, reconfiguration is performed (S126), and the operation is switched to the spare channel block (S122).
There is no particular alarm for the channel block (S114 is NO), there is a shortage of specific resource for the channel block (S116 is YES), there is no surplus in another resource of the channel block (S124 is NO), and the spare channel block is If there is (S128 is YES), reconfiguration with standard contents to the spare channel block is performed (S130), the spare channel block is added to the operation card (S132), and there is no spare channel block A warning is notified to the host (S134).
There is no particular alarm for the channel block (S114 is NO), there is a shortage of specific resources for the channel block (S116 is YES), there is no surplus in another resource of the channel coding unit (S124 is NO), and the spare channel block is If not (NO in S128), an alarm indicating a shortage of overall resources is notified to the host (S136).
Information on the configuration management unit is updated for the results of S122, S134, and S136 (S138), and the process returns to the monitoring of the resource state (S112).
In FIG. 5, the alarm is indicated as ALM, and the channel coding part is indicated as CH part.

  With this configuration, according to the present embodiment, it is possible to adjust the excess or deficiency of the channel coding function according to the environment in which the apparatus is always installed. In addition, it is possible to obtain optimum performance with the minimum hardware configuration, and the base station operator can provide a stable service with the minimum capital investment. At the same time, from the viewpoint of hardware design, unnecessary hardware that does not need to be used need not be mounted, which is advantageous in terms of cost, mounting, and power consumption.

  In the present embodiment, the base station apparatus of the wireless terminal has been described, but the same configuration can be adopted for the base station apparatus for the wired communication terminal. That is, it is clear that the same effect can be obtained by changing the wireless unit I / F to the wired unit I / F.

Second Embodiment In the example shown in FIG. 4, the description has been given focusing on the optimal allocation of DL / UL resources, but an example in which the types of resources are further expanded will be described with reference to FIG.

  In particular, regarding UL resources, the amount of resources required for call connection, such as path search resources, varies greatly depending on the environment in which the terminal is placed. Two typical examples are shown in FIG. (A) in the figure is a case where the distance from the base station is very far away such as a remote island. Normally, a large amount of path search resources are required according to the path search radius. At this time, if the traffic is low, the traffic is low by changing the allocation of the resource for path search and the resource for data transmission, and the configuration can be handled by the same amount of channel coding section.

  FIG. 6B shows communication from a high-speed moving terminal such as a subscriber on the Shinkansen. In this case, it is necessary to perform a path search for the signal affected by the Doppler shift. Even a large amount of resources are required. Also in this case, the configuration is performed by increasing the specific gravity for the path search resource. In this case, naturally, the amount of other resources is reduced, but if the amount of traffic is low, the same amount of channel coding units can cope. When considering the effective use of the channel coding section with regard to Fig. (B), by providing the Shinkansen timetable information to the base station, the spare channel coding section is compatible with the Doppler in accordance with the time the bullet train passes. You can devise such as configuring and assigning. At that time, if the operation interval of the Shinkansen is long, the use efficiency of the channel coding section can be remarkably increased.

  According to the present embodiment, it is possible to adjust the excess or deficiency of the resources of the channel coding unit according to the environment where the base station apparatus is always installed, and to obtain the optimum performance with the minimum hardware configuration. It becomes possible. Therefore, the base station operator can provide a stable service with a minimum capital investment. At the same time, it is not necessary to mount unnecessary hardware that is not used from the viewpoint of hardware design, and thus a base station apparatus that is advantageous in terms of cost, mounting, and power consumption is provided.

It is a functional block diagram which shows the structure of the base station apparatus which concerns on embodiment. It is a functional block diagram which shows the structure of the channel coding part which concerns on embodiment. It is a functional block diagram which shows the structure of the central control part of the base station apparatus which concerns on embodiment. It is a figure which shows the operation example of the base station apparatus which concerns on embodiment. It is a figure which shows the operation method of the whole base station apparatus which concerns on embodiment. (A) shows an example of operation in the case of being away from a base station such as a remote island, and (B) is a diagram showing an example of communication from a high-speed mobile terminal such as a subscriber on the Shinkansen.

Explanation of symbols

1 Transmission path I / F
2 Central control unit 3 Switch unit 4 Radio unit I / F
5-1 to 5-m Channel coding unit 11 Control unit 12 Switch unit 13 External I / F
14-1 to 14-n Resource unit 21 Control unit 22 Switch unit 23 External I / F
24 Resource Manager 25 Configuration Manager

Claims (8)

  1. A base station device,
    A transmission path I / F that interfaces with the transmission path;
    A central control unit connected to the transmission line I / F and controlling the entire base station apparatus;
    At least one channel coding unit connected to the central control unit and provided with a resource unit therein;
    A wireless unit I / F that interfaces with the central control unit and a wireless unit connected to the channel coding unit;
    The central control unit traces the resource state of the resource unit for a predetermined period, the channel coding unit prepares a spare resource in the channel coding unit based on the traced result, and the spare resource is used as necessary. A base station apparatus configured to configure the channel coding unit used as a working resource.
  2. The base station apparatus according to claim 1,
    Provided between the central control unit and the channel coding unit, between the channel coding unit and the radio unit I / F, and between the radio unit I / F and the central control unit, to exchange signals between the base station devices. A base station apparatus further comprising a switch unit for performing the operation.
  3. In the base station apparatus according to claim 1 or 2,
    The central control unit is a control unit that controls the entire central control unit;
    A resource management unit for managing the resource unit;
    A configuration management unit that performs configuration management of the channel coding unit;
    An external I / F that interfaces with the outside,
    A switch unit connected to the control unit, the resource management unit, the configuration management unit, and the external I / F;
    Have
    Configuration is given through the external I / F and the switch unit, and stored in the control unit, and information is given from the control unit to the resource management unit or the configuration management unit through the switch. A base station apparatus characterized by the above.
  4. In the base station apparatus of any one of Claims 1 thru | or 3,
    The central control unit is provided with a spare channel coding unit, performs a predetermined configuration on the spare channel coding unit, blocks the corresponding current channel coding unit, and sets the spare channel coding unit. A base station apparatus characterized by being replaced.
  5. In the base station apparatus of any one of Claims 1 thru | or 4,
    The base control apparatus, wherein the central control unit uses the spare resource to rotate the resource of the resource unit while resetting the channel coding.
  6. A control method for a base station apparatus,
    The resource state of the resource unit in the channel coding unit of the base station device is traced for a predetermined period by the resource management unit in the central control unit of the base station device,
    Based on the traced result, reserve resources are prepared in the channel coding unit,
    A control method of a base station apparatus by configuration of the channel coding unit that uses the spare resource as a working resource as necessary.
  7. In the base station apparatus control method of Claim 6,
    There is a cell with high traffic information,
    And when there is no spare channel coding unit, the central control unit issues an alarm that there is no spare channel coding unit,
    Encourage the replenishment of new channel coding parts,
    A control method for a base station apparatus, characterized in that traffic is reduced in advance.
  8. In the base station apparatus control method according to claim 6 or 7,
    When there are multiple cells with low traffic information, the central control unit combines a plurality of channel coding units corresponding to the cells,
    The surplus channel coding part is put in reserve,
    A control method for a base station apparatus, wherein an alarm indicating that a spare channel coding unit is present is issued.
JP2008000790A 2008-01-07 2008-01-07 Base station device and method of controlling the same Pending JP2009164912A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0823576A (en) * 1994-07-08 1996-01-23 Matsushita Electric Ind Co Ltd Radio telephony equipment
WO2005091530A1 (en) * 2004-03-19 2005-09-29 Nec Corporation Radio base station apparatus temporarily holding received signals in buffer
WO2005122610A1 (en) * 2004-06-10 2005-12-22 Utstarcom Telecom Co., Ltd. A method of allocating the centralized bs resource and routing signal
JP2007265245A (en) * 2006-03-29 2007-10-11 Nomura Research Institute Ltd Traffic monitoring device of security system
JP2007318559A (en) * 2006-05-26 2007-12-06 Fujitsu Ltd Radio base station receiving device, and program

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0823576A (en) * 1994-07-08 1996-01-23 Matsushita Electric Ind Co Ltd Radio telephony equipment
WO2005091530A1 (en) * 2004-03-19 2005-09-29 Nec Corporation Radio base station apparatus temporarily holding received signals in buffer
WO2005122610A1 (en) * 2004-06-10 2005-12-22 Utstarcom Telecom Co., Ltd. A method of allocating the centralized bs resource and routing signal
JP2007265245A (en) * 2006-03-29 2007-10-11 Nomura Research Institute Ltd Traffic monitoring device of security system
JP2007318559A (en) * 2006-05-26 2007-12-06 Fujitsu Ltd Radio base station receiving device, and program

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