JP2003087192A - Transmission power setting method and base station equipment - Google Patents
Transmission power setting method and base station equipmentInfo
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- JP2003087192A JP2003087192A JP2001277540A JP2001277540A JP2003087192A JP 2003087192 A JP2003087192 A JP 2003087192A JP 2001277540 A JP2001277540 A JP 2001277540A JP 2001277540 A JP2001277540 A JP 2001277540A JP 2003087192 A JP2003087192 A JP 2003087192A
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、送信電力設定方法
および基地局装置に関する。TECHNICAL FIELD The present invention relates to a transmission power setting method and a base station apparatus.
【０００２】[0002]
【従来の技術】“笹岡秀一：移動通信（オーム社、pp.1
53−155（1998））”に記載されているように、セルラ
方式の移動体通信システムでは、いわゆるリユースパー
ティショニング（Reuse Partitioning：ＲＰ）“Halper
n,S.W.：Reuse Partitioning in Cellular Systems（Pr
oc．of VTC'83，pp.322−327（1983））”を構成するこ
とにより、無線チャネル（以下、単に「チャネル」とい
う。）の繰り返し利用を多くすることができ、システム
全体としてより多くの呼を収容できるようになる。[Prior Art] "Shuichi Sasaoka: Mobile Communications (Ohm Company, pp.1
53-155 (1998) ”, the so-called reuse partitioning (RP)“ Halper ”is used in the cellular mobile communication system.
n, SW: Reuse Partitioning in Cellular Systems (Pr
oc. of VTC'83, pp.322-327 (1983)), it is possible to increase the number of repeated use of wireless channels (hereinafter simply referred to as "channels"), and to increase the number of calls for the entire system. Will be able to accommodate.
【０００３】ＲＰを構成することを目的とした自律分散
制御型のチャネル割当て法では、各セル内において基地
局が各チャネルのＣＩＲ（Carrier to Interference Ra
tio：希望波対干渉波比）を測定し、通信が行えるのに
必要なＣＩＲの閾値を超えるチャネルを割当て可能なチ
ャネルと判定して割り当てる。自律分散制御型のチャネ
ル割当てのアルゴリズムとしては、例えば、ＡＲＰ（Au
tonomous Reuse Partitioning）法やＡＣＣＡ（All-Cha
nnel Concentric Allocation）法等がある。In an autonomous distributed control type channel allocation method for the purpose of configuring an RP, a base station within each cell has a CIR (Carrier to Interference Ra) for each channel.
tio: ratio of desired wave to interference wave) is measured, and a channel exceeding a CIR threshold required for communication is determined to be an assignable channel and assigned. An example of an autonomous distributed control type channel allocation algorithm is ARP (Au
tonomous Reuse Partitioning) method and ACCA (All-Cha)
nnel Concentric Allocation) method.
【０００４】[0004]
【発明が解決しようとする課題】上記自律分散制御型の
チャネル割当て法を用いることによりチャネル利用効率
を高めることができるが、近年の移動体通信の加入者増
に伴い、チャネル利用効率をより高めることが求められ
ている。It is possible to increase the channel utilization efficiency by using the above-mentioned autonomous distributed control type channel allocation method. However, with the increase in the number of subscribers of mobile communication in recent years, the channel utilization efficiency is further enhanced. Is required.
【０００５】本発明はかかる点に鑑みてなされたもので
あり、チャネル利用効率を高めることができる送信電力
設定方法および基地局装置を提供することを目的とす
る。The present invention has been made in view of the above points, and an object of the present invention is to provide a transmission power setting method and a base station apparatus capable of improving channel utilization efficiency.
【０００６】[0006]
【課題を解決するための手段】本発明の送信電力設定方
法は、サービスエリアが複数のセルから構成される無線
通信システムにおける送信電力設定方法であって、複数
のセルのそれぞれに設けられた基地局において、無線チ
ャネルごとに送信電力の上限値が設定されており、他の
基地局が使用する無線チャネルと同一の無線チャネルに
対して同一の上限値が設定されているようにした。A transmission power setting method of the present invention is a transmission power setting method in a wireless communication system in which a service area is composed of a plurality of cells, and a base provided in each of the plurality of cells. In the station, an upper limit value of transmission power is set for each wireless channel, and the same upper limit value is set for the same wireless channel as the wireless channel used by another base station.
【０００７】この方法によれば、セル間において生じる
同一チャネル間での干渉を抑えることができるため、チ
ャネル利用効率を高めることができる。According to this method, it is possible to suppress the interference between the same channels which occurs between cells, so that the channel utilization efficiency can be improved.
【０００８】本発明の基地局装置は、複数の無線チャネ
ルを使用して複数の移動局と通信を行う基地局装置であ
って、複数の無線チャネルごとに定められた送信電力の
上限値であって、他の基地局装置が使用する無線チャネ
ルと同一の無線チャネルに対して同一の上限値を記憶す
る記憶手段と、前記記憶手段に記憶されている、各無線
チャネルに対応する上限値以下の送信電力で信号を送信
する送信手段と、を具備する構成を採る。A base station apparatus of the present invention is a base station apparatus that communicates with a plurality of mobile stations using a plurality of wireless channels, and is an upper limit value of transmission power determined for each of a plurality of wireless channels. Storage means for storing the same upper limit value for the same wireless channel as the wireless channel used by another base station device, and a storage means for storing the same upper limit value or less stored in the storage means for each wireless channel or less. And a transmission unit that transmits a signal with transmission power.
【０００９】この構成によれば、セル間において生じる
同一チャネル間での干渉を抑えることができるため、チ
ャネル利用効率を高めることができる。According to this structure, it is possible to suppress the interference between the same channels which occurs between cells, so that the channel utilization efficiency can be improved.
【００１０】[0010]
【発明の実施の形態】本発明者らは、セル間において生
じる同一チャネル間での干渉に着目し、この干渉を減ら
すことによってチャネル利用効率を高めることができる
ことを見出し、本発明をするに至った。BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have paid attention to interference between co-channels that occur between cells, and have found that it is possible to improve channel utilization efficiency by reducing this interference, and completed the present invention. It was
【００１１】すなわち、本発明の骨子は、チャネルごと
に基地局間で同一の送信電力上限値を設定し、すべての
基地局がその上限値以下の送信電力で各チャネルを使用
して信号を送信することである。That is, the gist of the present invention is that the same transmission power upper limit value is set between the base stations for each channel, and all the base stations transmit signals using the respective channels with the transmission power below the upper limit value. It is to be.
【００１２】以下、本発明の一実施の形態について図面
を参照して詳細に説明する。図１は、本発明の一実施の
形態に係る無線通信システムの概略図である。この無線
通信システムのサービスエリアはセル１〜３の複数のセ
ルから構成されており、セル１〜３には各々、基地局
（ＢＳ）１〜３が設けられている。また、基地局１〜３
はそれぞれ、複数のチャネルを使用して複数の移動局と
通信を行う。例えば、基地局１は、セル１内に位置する
移動局（ＭＳ）１１および１２と、異なるチャネルを使
用して通信を行う。各基地局が使用できるチャネルは予
め定められており、今ここでは、各基地局はそれぞれ、
チャネル１〜４の４つのチャネルを使用できるものとす
る。An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention. The service area of this wireless communication system is composed of a plurality of cells, cells 1 to 3, and cells 1 to 3 are respectively provided with base stations (BS) 1 to 3. Also, base stations 1 to 3
Respectively communicate with multiple mobile stations using multiple channels. For example, the base station 1 communicates with mobile stations (MS) 11 and 12 located in the cell 1 using different channels. The channels that each base station can use are predetermined, and now each base station
It is assumed that four channels of channels 1 to 4 can be used.
【００１３】図２は、本発明の一実施の形態に係る基地
局装置の構成を示すブロック図である。図１に示す基地
局１〜３は、すべて同一の構成を採る。FIG. 2 is a block diagram showing the configuration of the base station apparatus according to the embodiment of the present invention. The base stations 1 to 3 shown in FIG. 1 all have the same configuration.
【００１４】ここで、チャネルとは、基地局と移動局と
の間で通信を行うために設定される無線通信路のことを
いう。具体的には、ＦＤＭＡ（Frequency Division Mul
tiple Access）の場合なら特定の周波数帯域のことであ
り、ＴＤＭＡ（Time Division Multiple Access）の場
合なら特定のタイムスロットのことであり、ＣＤＭＡ
（Code Division Multiple Access）の場合なら特定の
符号系列のことである。以下、ＣＤＭＡを一例に挙げて
説明する。Here, the channel means a wireless communication path set up for communication between a base station and a mobile station. Specifically, FDMA (Frequency Division Mul)
In the case of tiple access, it means a specific frequency band, in the case of TDMA (Time Division Multiple Access), it means a specific time slot, and CDMA.
In the case of (Code Division Multiple Access), it means a specific code sequence. Hereinafter, CDMA will be described as an example.
【００１５】図２において、変調部１０１、拡散部１０
２、および電力制御部１０４から構成される部分はチャ
ネル数分（ここでは４つ）備えられる。信号１〜４は、
変調部１０１で位相変調等の所定の変調処理を施された
後、チャネルごとに備えられた拡散部１０２によってそ
れぞれ異なる拡散符号によって拡散される。拡散後の信
号は、電力制御部１０４に入力される。In FIG. 2, the modulator 101 and the diffuser 10 are shown.
2, and a portion including the power control unit 104 is provided for the number of channels (four here). Signals 1-4 are
After being subjected to a predetermined modulation process such as phase modulation in the modulator 101, the spreader 102 provided for each channel spreads with a different spreading code. The spread signal is input to the power control unit 104.
【００１６】上限値設定部１０３は、チャネルごと（す
なわち、拡散符号ごと）に送信電力の上限値を設定す
る。具体的には、上限値設定部１０３は、図３に示すよ
うな、チャネルと送信電力の上限値との対応関係を示す
テーブルを予め記憶しており、このテーブルを参照して
チャネルごと（すなわち、拡散符号ごと）に送信電力の
上限値を設定する。今ここでは、チャネル番号が大きく
なるほど、送信電力の上限値を高く設定するものとす
る。Upper limit setting section 103 sets the upper limit of transmission power for each channel (that is, for each spreading code). Specifically, the upper limit value setting unit 103 stores in advance a table showing the correspondence between the channels and the upper limit value of the transmission power as shown in FIG. 3, and refers to this table for each channel (that is, , For each spreading code). Here, it is assumed that the upper limit value of the transmission power is set higher as the channel number increases.
【００１７】また、基地局１〜３の上限値設定部１０３
はすべて、同一の内容のテーブルを記憶している。これ
により、各基地局が使用できる４つのチャネル１〜４に
対しては、各チャネルごとに相互に同一の上限値が設定
される。つまり、基地局１〜３の間で同一のチャネルに
対しては同一の上限値が設定される。Further, the upper limit value setting unit 103 of the base stations 1 to 3
All store the same content table. As a result, the same upper limit value is set for each of the four channels 1 to 4 that can be used by each base station. That is, the same upper limit value is set for the same channel among the base stations 1 to 3.
【００１８】チャネルごとに備えられた電力制御部１０
４では、各チャネルで送信される信号の送信電力が、上
限値設定部１０３で設定された上限値以下に制御され
る。このとき、電力制御部１０４は、上限値以下の範囲
で送信電力を変化させてもよく、また、上限値で送信電
力を固定としてもよい。A power control unit 10 provided for each channel
In 4, the transmission power of the signal transmitted on each channel is controlled to be equal to or lower than the upper limit value set by the upper limit value setting unit 103. At this time, the power control unit 104 may change the transmission power within a range equal to or less than the upper limit value, or may fix the transmission power at the upper limit value.
【００１９】それぞれ上限値以下に送信電力が制御され
たチャネル１〜４の信号は、多重部１０５で多重された
後、送信ＲＦ部１０６でＤ／Ａ変換やアップコンバート
等の所定の無線処理を施されてアンテナ１０７から送信
される。The signals of channels 1 to 4 whose transmission powers are controlled to be equal to or lower than the upper limit values are multiplexed by a multiplexing unit 105 and then subjected to predetermined radio processing such as D / A conversion and up-conversion in a transmission RF unit 106. It is applied and transmitted from the antenna 107.
【００２０】ここで、本実施の形態では、チャネルごと
に異なる送信電力の上限値を設定するため（図３）、設
定する上限値の高さにより各チャネルの信号が届く範囲
を設定することができる。例えば、図４を参照するに、
範囲Ａに位置する移動局に対してチャネル１、２、３、
４の信号を受信可能となるように上限値を設定し、範囲
Ｂに位置する移動局に対してチャネル２、３、４の信号
を受信可能となるように上限値を設定し、範囲Ｃに位置
する移動局に対してチャネル３、４の信号を受信可能と
なるように上限値を設定し、範囲Ｄに位置する移動局に
対してチャネル４の信号を受信可能となるように上限値
を設定する。そして、チャネル割当てを、例えば以下の
ようにして行う。In this embodiment, since the upper limit value of the transmission power which is different for each channel is set (FIG. 3), the range of the signal of each channel can be set by the height of the set upper limit value. it can. For example, referring to FIG.
Channels 1, 2, 3, for mobile stations located in range A,
4 is set so that the mobile station located in range B can receive the signals of channels 2, 3 and 4, and the upper limit is set in range C. The upper limit is set so that the mobile station located can receive the signals of channels 3 and 4, and the upper limit is set so that the mobile station located in the range D can receive the signal of channel 4. Set. Then, channel allocation is performed as follows, for example.
【００２１】すなわち、（１）基地局が、各チャネルの
上限値以下の送信電力の既知信号（パイロット信号）を
移動局に送信する。既知信号は、それぞれ各チャネルに
対応している。（２）移動局は、受信したチャネル数分
の既知信号の受信品質（例えば、ＣＩＲ）を測定する。
そして、移動局は、所要の品質を満たしているチャネル
のうち、最も受信品質が低いチャネルを基地局に通知す
る。（３）基地局は、移動局から通知されたチャネルを
その移動局に割り当てる。That is, (1) the base station transmits a known signal (pilot signal) having a transmission power equal to or lower than the upper limit value of each channel to the mobile station. The known signal corresponds to each channel. (2) The mobile station measures the reception quality (for example, CIR) of known signals for the number of received channels.
Then, the mobile station notifies the base station of the channel having the lowest reception quality among the channels satisfying the required quality. (3) The base station allocates the channel notified from the mobile station to the mobile station.
【００２２】このようにしてチャネル割当てを行うと、
割り当てられるチャネルはセル内での移動局の存在位置
により決定される。図４を参照するに、範囲Ａに位置す
る移動局はチャネル１、２、３、４の信号を受信可能で
あり、それらのチャネルはすべて所要の品質を満たすこ
とになるが、その中でチャネル１の信号の上限値が最も
低いので、移動局での受信品質はチャネル１の信号が最
も低くなる。よって、範囲Ａに位置する移動局にはチャ
ネル１が割り当てられる。同様に、範囲Ｂに位置する移
動局はチャネル２、３、４の信号を受信可能であり、そ
れらのチャネルはすべて所要の品質を満たすことになる
が、その中でチャネル２の信号の上限値が最も低いの
で、移動局での受信品質はチャネル２の信号が最も低く
なる。よって、範囲Ｂに位置する移動局にはチャネル２
が割り当てられる。以下、範囲Ｃ、Ｄについても同様で
ある。これにより、セル１内に基地局１を中心とした同
心円状の内部セルが形成される。When channel allocation is performed in this way,
The assigned channel is determined by the position of the mobile station in the cell. Referring to FIG. 4, a mobile station located in the range A can receive signals of channels 1, 2, 3, and 4, all of which will meet the required quality. Since the upper limit value of the signal of 1 is the lowest, the signal of channel 1 has the lowest reception quality at the mobile station. Therefore, channel 1 is assigned to mobile stations located in range A. Similarly, a mobile station located in range B can receive the signals of channels 2, 3, and 4, which will all meet the required quality, of which the upper limit of the signal of channel 2 Is the lowest, the reception quality at the mobile station is the lowest for the channel 2 signal. Therefore, for the mobile stations located in range B, channel 2
Is assigned. Hereinafter, the same applies to the ranges C and D. As a result, a concentric internal cell centered on the base station 1 is formed in the cell 1.
【００２３】図４ではセル１を例に挙げているが、基地
局１〜３の間では同一のチャネルに対しては同一の上限
値が設定されるため、他のセルでのチャネル割当てもセ
ル１と同様に行われる。このように、チャネルごとに異
なる送信電力の上限値を設定することで、上述したよう
な簡単なチャネル割当て法によってＲＰを構成すること
ができる。また、ＣＤＭＡでは同一周波数帯で複数の移
動局に対する信号が同時に送信されるため、チャネルご
とに異なる送信電力の上限値を設定することで、同一セ
ル内において、送信電力が高いチャネルに対する送信電
力が低いチャネルからの干渉が減少する。よって、送信
電力の上限値が高いチャネルを使用する移動局ほど従来
に比べ受信品質が向上する。In FIG. 4, cell 1 is taken as an example, but since the same upper limit is set for the same channel among base stations 1 to 3, channel allocation in other cells is also performed by the cell. The same as in 1. In this way, by setting different upper limit values of the transmission power for each channel, the RP can be configured by the above-mentioned simple channel allocation method. Further, in CDMA, signals for a plurality of mobile stations are simultaneously transmitted in the same frequency band. Therefore, by setting different upper limit values of the transmission power for each channel, the transmission power for a channel with high transmission power can be increased in the same cell. Interference from low channels is reduced. Therefore, a mobile station using a channel having a higher upper limit of transmission power has better reception quality than the conventional one.
【００２４】このように、本実施形態では、各基地局が
チャネルごとに送信電力の上限値を設定する。しかも、
すべての基地局間において、同一のチャネルに対しては
同一の送信電力の上限値を設定する。このようにして送
信電力の上限値を設定することにより、簡単にＲＰを構
成することができる。また、セル間において生じる同一
チャネル間での干渉を抑えることにより、チャネル利用
効率を高めることができる。また、送信電力の上限値を
低く設定するほど、信号の送信にかかる消費電力を減ら
すことができる。As described above, in this embodiment, each base station sets the upper limit value of the transmission power for each channel. Moreover,
The same upper limit of transmission power is set for the same channel between all base stations. By thus setting the upper limit value of the transmission power, the RP can be easily configured. Further, it is possible to improve the channel utilization efficiency by suppressing the interference between the same channels which occurs between cells. Further, the lower the upper limit value of the transmission power is set, the more the power consumption required for signal transmission can be reduced.
【００２５】なお、上記説明では、各チャネルの送信電
力の上限値をそれぞれ異なるものとして説明したが、使
用できるチャネルの中で同一の上限値を持つチャネルが
存在してもよい。In the above description, the upper limit value of the transmission power of each channel is different, but there may be channels having the same upper limit value among the usable channels.
【００２６】また、１つの移動局に対して複数のチャネ
ルを割り当てて通信を行う場合には、それらのチャネル
のうちで最低の上限値となる上限値以下の送信電力で複
数のチャネルの信号を送信する。このようにすることに
より、他セルへの干渉をさらに減らすことができる。Further, when a plurality of channels are assigned to one mobile station for communication, signals of a plurality of channels are transmitted with a transmission power equal to or lower than the upper limit value which is the lowest upper limit value of those channels. Send. By doing so, interference with other cells can be further reduced.
【００２７】また、本発明におけるチャネルとは、特定
の周波数帯域、特定のタイムスロットおよび特定の符号
系列をそれぞれ組み合わせたものでもよい。例えば、特
定の周波数帯域と特定の符号系列とを組み合わせたもの
もチャネルであり、また、特定の周波数帯域、特定のタ
イムスロットおよび特定の符号系列を組み合わせたもの
もチャネルである。A channel in the present invention may be a combination of a specific frequency band, a specific time slot and a specific code sequence. For example, a combination of a specific frequency band and a specific code sequence is a channel, and a combination of a specific frequency band, a specific time slot and a specific code sequence is a channel.
【００２８】また、本発明をマルチキャリア変調方式の
一つであるＯＦＤＭ（Orthogonal Frequency Division
Multiplexing）方式に適用し、各サブキャリアごとに送
信電力の上限値を設定することも可能である。この場
合、各サブキャリアが本発明でいうチャネルに相当す
る。さらに、１つの移動局に対して複数のサブキャリア
が割り当てられる場合には、その複数のサブキャリアの
送信電力の上限値を同一に設定する。この場合、複数の
サブキャリアで構成されるサブキャリア群が本発明でい
うチャネルに相当する。例えば、ＯＦＤＭ信号が１６サ
ブキャリアで構成され、４つの移動局に４サブキャリア
ずつ割り当てられる場合には、本発明では、４サブキャ
リアで構成されるサブキャリア群を１チャネルとみなす
ことができる。The present invention is also applied to OFDM (Orthogonal Frequency Division) which is one of the multi-carrier modulation systems.
It is also possible to set the upper limit of the transmission power for each subcarrier by applying the multiplexing) method. In this case, each subcarrier corresponds to the channel in the present invention. Furthermore, when a plurality of subcarriers are assigned to one mobile station, the upper limits of the transmission power of the plurality of subcarriers are set to be the same. In this case, a subcarrier group composed of a plurality of subcarriers corresponds to the channel in the present invention. For example, when an OFDM signal is composed of 16 subcarriers and 4 subcarriers are allocated to each of 4 mobile stations, a subcarrier group composed of 4 subcarriers can be regarded as one channel in the present invention.
【００２９】[0029]
【発明の効果】以上説明したように、本発明によれば、
セル間において生じる同一チャネル間での干渉を減らし
てチャネル利用効率を高めることができる。As described above, according to the present invention,
It is possible to reduce interference between co-channels generated between cells and improve channel utilization efficiency.
【図１】本発明の一実施の形態に係る無線通信システム
の概略図FIG. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
【図２】本発明の一実施の形態に係る基地局装置の構成
を示すブロック図FIG. 2 is a block diagram showing a configuration of a base station apparatus according to an embodiment of the present invention.
【図３】チャネルと送信電力の上限値との対応関係を示
すテーブルの一例FIG. 3 is an example of a table showing a correspondence relationship between channels and an upper limit value of transmission power.
【図４】本発明の一実施の形態に係る無線通信システム
において形成される内部セルの概念図FIG. 4 is a conceptual diagram of an internal cell formed in the wireless communication system according to the embodiment of the present invention.
１０１ 変調部 １０２ 拡散部 １０３ 上限値設定部 １０４ 電力制御部 １０５ 多重部 １０６ 送信ＲＦ部 １０７ アンテナ 101 Modulator 102 diffusion unit 103 Upper limit value setting section 104 power control unit 105 Multiplexer 106 RF transmitter 107 antenna
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須増 淳 神奈川県横浜市港北区綱島東四丁目３番１ 号 松下通信工業株式会社内 (72)発明者 三好 憲一 神奈川県横浜市港北区綱島東四丁目３番１ 号 松下通信工業株式会社内 Ｆターム(参考） 5K022 EE01 EE21 5K060 BB05 CC04 CC11 DD04 HH31 HH32 LL01 LL16 5K067 AA03 CC10 EE02 EE10 EE22 GG08 HH23 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Jun Sumasu 3-1, Tsunashima-Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industry Co., Ltd. (72) Inventor Kenichi Miyoshi 3-1, Tsunashima-Higashi 4-chome, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industry Co., Ltd. F term (reference) 5K022 EE01 EE21 5K060 BB05 CC04 CC11 DD04 HH31 HH32 LL01 LL16 5K067 AA03 CC10 EE02 EE10 EE22 GG08 HH23
Claims (2)
れる無線通信システムにおける送信電力設定方法であっ
て、 複数のセルのそれぞれに設けられた基地局において、 無線チャネルごとに送信電力の上限値が設定されてお
り、他の基地局が使用する無線チャネルと同一の無線チ
ャネルに対して同一の上限値が設定されている、 ことを特徴とする送信電力設定方法。1. A method for setting transmission power in a wireless communication system in which a service area includes a plurality of cells, wherein a base station provided in each of the plurality of cells has an upper limit value of the transmission power for each wireless channel. The transmission power setting method is characterized in that the same upper limit value is set for the same wireless channel as that used by other base stations.
動局と通信を行う基地局装置であって、 複数の無線チャネルごとに定められた送信電力の上限値
であって、他の基地局装置が使用する無線チャネルと同
一の無線チャネルに対して同一の上限値を記憶する記憶
手段と、 前記記憶手段に記憶されている、各無線チャネルに対応
する上限値以下の送信電力で信号を送信する送信手段
と、 を具備することを特徴とする基地局装置。2. A base station device that communicates with a plurality of mobile stations using a plurality of radio channels, wherein the base station device has an upper limit value of transmission power determined for each of the plurality of radio channels and is another base station. Storage means for storing the same upper limit value for the same wireless channel as that used by the device, and transmitting a signal with a transmission power less than or equal to the upper limit value corresponding to each wireless channel stored in the storage means A base station device comprising:
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|---|---|---|---|
| JP2001277540A JP2003087192A (en) | 2001-09-13 | 2001-09-13 | Transmission power setting method and base station equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001277540A JP2003087192A (en) | 2001-09-13 | 2001-09-13 | Transmission power setting method and base station equipment |
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|---|---|
| JP2003087192A true JP2003087192A (en) | 2003-03-20 |
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ID=19102051
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