JP3371389B2 - Channel assignment method - Google Patents
Channel assignment methodInfo
- Publication number
- JP3371389B2 JP3371389B2 JP03471795A JP3471795A JP3371389B2 JP 3371389 B2 JP3371389 B2 JP 3371389B2 JP 03471795 A JP03471795 A JP 03471795A JP 3471795 A JP3471795 A JP 3471795A JP 3371389 B2 JP3371389 B2 JP 3371389B2
- Authority
- JP
- Japan
- Prior art keywords
- channel
- wireless
- radio
- interference wave
- wave reception
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は移動通信の無線チャネル
割り当てに関する。FIELD OF THE INVENTION This invention relates to radio channel assignment for mobile communications.
【０００２】[0002]
【従来の技術】複数の無線ゾーンにおおわれた移動通信
システムにおいては、同一の無線チャネルをできるだけ
短い間隔で繰り返し利用して、システム全体で使用され
ている無線チャネルの数を少なくするのが、周波数利用
効率上望ましいとされている。2. Description of the Related Art In a mobile communication system covered by a plurality of radio zones, it is necessary to reduce the number of radio channels used in the entire system by repeatedly using the same radio channel at the shortest intervals. It is said to be desirable in terms of utilization efficiency.
【０００３】したがって、たとえば図１に示すように
（簡単のため、１次元的に無線ゾーンが配置されている
例について説明する）、干渉波の受信電力が最も強い無
線チャネルを生起した呼に対して周波数を割り当てる制
御を行ってきた。なお、チャネル再利用可能距離は３ゾ
ーン分とした。Therefore, for example, as shown in FIG. 1 (for simplicity, an example in which wireless zones are arranged one-dimensionally will be described), for a call that originates in a wireless channel in which the received power of an interference wave is the strongest. Have performed control to allocate frequencies. The channel reusable distance was set to 3 zones.
【０００４】しかしながら、上記の制御手順を行うと、
トラヒックが疎である場合においても、一方では、他に
高品質な無線チャネルがありながら、所要品質を丁度満
たす程度の無線チャネルを割り当てるという無駄が生じ
る。However, when the above control procedure is performed,
Even if the traffic is sparse, on the other hand, there is a waste of allocating a radio channel of a degree that just satisfies the required quality, although there is another radio channel of high quality.
【０００５】他方、以下のように、呼の生起順序によっ
ては、上記の制御手順には周波数利用効率上無駄が生じ
る。On the other hand, as described below, the above control procedure is wasted in terms of frequency utilization efficiency depending on the order of call origination.
【０００６】使用可能なチャネルが２つ与えられている
システムにおいて、図２に示す順序で呼が生起したとき
に、上記の制御手順では、図３に示すようにＣ1 に対し
てｆ1 を割り当ててしまうため、Ｃ4 に対してｆ1 、ｆ
2 を割り当てることができず呼損となる。ここでも再利
用可能距離は３ゾーンとした。In a system in which two usable channels are provided, when a call occurs in the order shown in FIG. 2, the above control procedure sets f 1 to C 1 as shown in FIG. Since it is allocated, f 1 , f for C 4
2 cannot be assigned, resulting in a call loss. Again, the reusable distance was 3 zones.
【０００７】上記のように、従来の制御手順には、通信
品質上にも周波数利用効率上にも無駄があり、改善の必
要がある。As described above, the conventional control procedure is wasteful in terms of communication quality and frequency utilization efficiency and needs to be improved.
【０００８】[0008]
【発明が解決しようとする課題】本発明の目的は、SUMMARY OF THE INVENTION The object of the present invention is to
【０００９】トラヒックの疎密に応じて、
（ア）トラヒックが疎なときは、無線チャネルの再利用
間隔を大きくし、高品質な通信サービスを提供できるよ
うにし、
（イ）トラヒックが密なときは、無線チャネルの再利用
間隔を小さくして周波数利用効率を高め、According to the density of traffic, (a) when the traffic is sparse, the reuse interval of the radio channel is increased so that high quality communication service can be provided, and (a) when the traffic is dense, , Increase the frequency utilization efficiency by reducing the reuse interval of wireless channels,
【００１０】さらに、呼の生起順序によって、周波数利
用効率が劣化しないチャネル割り当ての実現である。Further, the present invention realizes channel allocation in which the frequency utilization efficiency does not deteriorate due to the call generation order.
【００１１】[0011]
【課題を解決するための手段】本発明のチャネル割り当
て方法によれば、各無線基地局は、該無線基地局を中心
とする無線ゾーン内で呼が生起したとき、空きチャネル
の干渉波受信レベルの測定を行い、上記測定結果が、通
信に使用する無線チャネルに対する干渉波受信レベルの
所要品質基準を満たしている無線チャネルからのみチャ
ネル割り当てを行うものとし、 （ア）干渉波受信レベルが所要値以下であって一定値以
上の範囲内にある無線チャネルが１つ以上ある場合、該
無線チャネルのうち、該干渉波受信レベルが前記所要値
に最も近い、即ち該干渉波受信レベルが最大の無線チャ
ネルを割り当て、 （イ）干渉波受信レベルが前記範囲内にある無線チャネ
ルがない場合、該干渉波受信レベルが前記範囲から最も
離れた、即ち干渉波受信レベルが最小の無線チャネルを
割り当てるチャネル割り当て方法である。また、本発明
のチャネル割り当て方法によれば、各無線基地局は、該
無線基地局を中心とする無線ゾーン内で呼が生起したと
き、空きチャネルの希望波干渉波受信電力比の測定を行
い、上記測定結果が、通信に使用する無線チャネルに対
する希望波干渉波受信電力比の所要品質基準を満たして
いる無線チャネルからのみチャネル割り当てを行うもの
とし、 （ア）希望波干渉波受信電力比が所要値以上であって一
定値以下の範囲内にある無線チャネルが１つ以上ある場
合、該無線チャネルのうち、該希望波干渉波受信電力比
が前記所要値に最も近い、即ち該希望波干渉波受信電力
比が最小の無線チャネルを割り当て、 （イ）希望波干渉波受信電力比が前記範囲内にある無線
チャネルがない場合、該希望波干渉波受信電力比が前記
範囲から最も離れた、即ち該希望波干渉波電力比が最大
のチャネルを割り当てるチャネル割り当て方法である。
尚、以下では、干渉波受信レベル又は希望波干渉波受信
電力比を、判定パラメータとして説明する。
本発明は、
呼生起時に、空きチャネル判定パラメータが所要値以上
一定値以下となる無線チャネルがあれば、そのうち所要
値に空きチャネル判定パラメータが最も近い無線チャネ
ルを割り当て、空きチャネル判定パラメータが所要値以
上一定値以下となる無線チャネルがなければ、空きチャ
ネル判定パラメータ（又は別個のパラメータ）が最も大
きい無線チャネルを割り当てることを特徴とする。従来
の技術とは、無線チャネルの使用状況に応じて、あえて
再利用間隔が大きい無線チャネルを割り当てる場合のあ
る点が異なる。 Channel assignment according to the present invention
According to the method, each radio base station is centered on the radio base station.
When a call originates in the wireless zone
Measurement of the interference wave reception level of the
Of the interference wave reception level for the radio channel used for
Only from channels that meet the required quality standards
And performs channel assignment, a predetermined value than a less required value (A) the interference wave receiving level
If there is more than one radio channel in the above range,
Of the wireless channels, the interference wave reception level is the required value
To the wireless channel that has the maximum reception level of the interference wave.
Assign the panel, (a) radio interference wave receiving level is within the range channel
If there is no signal, the reception level of the interference wave is the most
Wireless channels that are distant,
This is a channel allocation method. Also, the present invention
According to the channel allocation method of
When a call originated in the wireless zone centered on the wireless base station
Measure the reception power ratio of the desired wave to the interference wave of the empty channel.
The above measurement result is not applicable to the wireless channel used for communication.
Meets the required quality standards for the desired signal to interference signal received power ratio
Assigning channels only from existing wireless channels
And one comprising a (A) desired wave interference wave reception power ratio is above the required value
If there is at least one wireless channel within the range below the fixed value
In the case of the wireless channel, the reception power ratio of the desired wave interference wave
Is the closest to the required value, that is, the desired wave interference wave received power
A radio channel with the smallest ratio is assigned, and (a) a radio with a desired wave interference wave reception power ratio within the above range.
If there is no channel, the desired power interference reception power ratio is
The farthest from the range, that is, the desired wave interference wave power ratio is maximum
This is a channel allocation method for allocating channels of.
In the following, the interference wave reception level or desired wave interference wave reception
The power ratio will be described as a determination parameter. The present invention is
When a call occurs, if there is a wireless channel whose free channel determination parameter is greater than or equal to the required value and less than or equal to a certain value, the wireless channel whose free channel determination parameter is closest to the required value is assigned, and the free channel determination parameter is greater than or equal to the required value and less than or equal to a certain value. If there is no wireless channel that becomes, the wireless channel having the largest free channel determination parameter (or separate parameter) is assigned. This is different from the conventional technique in that a wireless channel with a large reuse interval may be allocated depending on the usage status of the wireless channel.
【００１２】従来の技術とは、無線チャネルの使用状況
に応じて、あえて再利用間隔が大きい無線チャネルを割
り当てる場合のある点が異なる。This is different from the prior art in that a wireless channel with a large reuse interval may be allocated depending on the usage status of the wireless channel.
【００１３】[0013]
（実施例１）本実施例は請求範囲第１項に対する。 (Embodiment 1) This embodiment corresponds to the first claim.
【００１４】図４は本実施例を実現する移動通信システ
ムの図である。簡単のため、１次元的にゾーンが配置さ
れている場合について説明する。FIG. 4 is a diagram of a mobile communication system which realizes this embodiment. For simplicity, a case where zones are arranged one-dimensionally will be described.
【００１５】図４において、１次元的に無線セルがなら
んでおり、最短の再利用間隔は４セルとする。又、本発
明方式で使用する、所要品質とは別の閾値に対応する間
隔を６セルとする。現在、注目するセル４−ｂの２つ左
のセルでｆ3 、３つ右でｆ2、５つ右でｆ1 、７つ右で
ｆ4 を使用して通信が行われており、４−ｂにおいて呼
が生起した状況が４−ａである。同様に、現在、注目す
るセル４−ｂの２つ左のセルでｆ3 、３つ右でｆ4 、７
つ右でｆ1 、８つ右でｆ2 を使用して通信が行われてお
り、４−ｂにおいて呼が生起した状況が４−ｅである。In FIG. 4, wireless cells are arranged one-dimensionally, and the shortest reuse interval is 4 cells. In addition, the interval corresponding to a threshold different from the required quality used in the method of the present invention is 6 cells. Currently, are communicated using the cell 4-b f the two left cell of 3, three right f 2, 5 one right f 1, 7 single right f 4 of interest is carried out, 4 The situation where the call originated in -b is 4-a. Similarly, at the present time, the cell 4-b to the left of the cell 4-b of interest is f 3 , and the cell 3 to the right is f 4 , 7
Communication is performed using f 1 on the right side of 8 and f 2 on the right side of 8 and the situation in which a call originates in 4-b is 4-e.
【００１６】各無線ゾーンを形成するのはその中心に位
置する無線基地局であり、そのそれぞれは、通信に使用
されていない空き無線機又は専用無線機を用いて周辺無
線ゾーンからの干渉波の受信電力を各無線チャネルにつ
いて測定する機能を具備している。Each radio zone is formed by a radio base station located at the center of the radio zone, and each of the radio base stations uses an idle radio or a dedicated radio that is not used for communication to generate an interference wave from a peripheral radio zone. It has a function to measure the received power for each radio channel.
【００１７】各無線ゾーンにおける無線チャネルの使用
状況が４−ａに示すようであったときに、無線ゾーン４
−ｂに呼が生起した場合、干渉波受信電力が所要値と一
定値の中間の値をとる空き無線チャネルｆ1 を割り当て
る。無線チャネルの再利用間隔は、瞬時変動等によって
影響を受けるが、干渉波の受信電力と対応関係をもつた
め、図示すると、干渉波受信電力が所要値を満たす距離
４−ｃ、干渉波受信電力が一定値以下である距離４−ｄ
となり、その中間の距離で繰り返し利用されているｆ1
が割り当てチャネルとなる。When the use condition of the wireless channel in each wireless zone is as shown in 4-a, the wireless zone 4
When a call is originated to the -b, interference wave reception power allocates available radio channels f 1 that takes an intermediate value of a constant value and the required value. The reuse interval of the wireless channel is affected by instantaneous fluctuations and the like, but since it has a correspondence relationship with the reception power of the interference wave, in the figure, the distance 4-c at which the reception power of the interference wave satisfies the required value, the reception power of the interference wave, Is a certain value or less 4-d
And f 1 is used repeatedly at an intermediate distance
Is the assigned channel.
【００１８】一方、４−ｅに示すように無線チャネルが
使用されている状況で無線ゾーン４−ｆに呼が生起した
とすると、干渉波受信電力が所要値を満たす距離と干渉
波受信電力が一定値以上の距離の中間で使用されている
空き無線チャネルがないので、最も遠い距離で使用され
ているｆ2 を割り当てる。上記の手順のフローチャート
を図５に示す。On the other hand, if a call originates in the radio zone 4-f in the situation where the radio channel is used as shown in 4-e, the distance at which the interference wave reception power satisfies the required value and the interference wave reception power are Since there is no free radio channel used in the middle of the distance equal to or larger than the fixed value, f 2 used in the farthest distance is assigned. A flowchart of the above procedure is shown in FIG.
【００１９】図５において、呼が生起したら（Ｆ１
０）、空きチャネル判定パラメータ（干渉波受信レベル
等）を全チャネル又は一定数チャネルについて測定する
（Ｆ１２）。所要品質を満たすチャネルが見つからなけ
れば（Ｆ１４）、呼損とし（Ｆ２６）、接続を行わな
い。所要品質を満たすチャネルが見つかった場合は（Ｆ
１６）、そのうち、空きチャネル判定パラメータが一定
値以上（以下）のチャネルを検索し、見つかれば、その
中で、所要品質に最も近いチャネルを（Ｆ１８）、見つ
からなければ、空きチャネル判定パラメータが最も小さ
い（大きい）チャネルを選択する（Ｆ２０）。In FIG. 5, when a call occurs (F1
0), idle channel determination parameters (interference wave reception level, etc.) are measured for all channels or a fixed number of channels (F12). If no channel satisfying the required quality is found (F14), the call is lost (F26), and the connection is not established. If a channel that meets the required quality is found (F
16) Of those channels, a channel whose free channel determination parameter is a certain value or more (less than or equal to) is searched for, and if found, a channel closest to the required quality is found (F18). The small (large) channel is selected (F20).
【００２０】（実施例２）上記実施例１において、空き
チャネル判定パラメータを希望波干渉波受信レベル比
（ＣＩＲ）とする。その他の点については、実施例１と
同様に動作する。(Embodiment 2) In Embodiment 1, the free channel determination parameter is the desired wave interference wave reception level ratio (CIR). In other respects, the operation is similar to that of the first embodiment.
【００２１】ＣＩＲは希望波受信電力にも依存するた
め、干渉波受信電力の場合のように、距離との対応関係
が単純ではないが、個々の呼に対しては、やはりＣＩＲ
が所要値を満たす距離図６の６−ａ、６−ａ’、ＣＩＲ
が一定値以下である距離６−ｂ、６−ｂ’のように図示
でき、その中間の距離で繰り返し利用されているｆ1 、
最も遠い距離で使用されているｆ2 が割り当てられる。Since the CIR also depends on the received power of the desired wave, the correspondence with the distance is not simple as in the case of the received power of the interference wave, but for each call, the CIR still remains.
6-a, 6-a ′ in FIG. 6 and CIR satisfying the required value
Can be illustrated as distances 6-b and 6-b ′ in which is less than a certain value, and f 1 which is repeatedly used at an intermediate distance,
The f 2 used at the farthest distance is assigned.
【００２２】[0022]
【発明の効果】本発明によれば、図７に示すように、ト
ラヒックが疎なときには、空きチャネル判定パラメータ
が所要値以上、一定値以下のチャネルがないために、空
きチャネル判定パラメータ最小（あるいは最大）＝再利
用間隔を大きくとることにより、高品質なサービスを提
供することが可能である。又、トラヒックが密なときに
は、できるだけ空きチャネル判定パラメータを大きく
（小さく）＝再利用間隔を小さくするように動作するの
で、周波数利用効率を高めることもできる（図８）。
又、使用可能なチャネルが２つ与えられているシステム
において、図９に示すような順序（図２及び図３と同じ
順序）で各無線ゾーンに呼が生起した場合、トラヒック
が疎であった時点で生起した呼Ｃ2 に対して、再利用間
隔を可能なかぎり大きくとりｆ2 を割り当ててあるため
に、トラヒックが密となった時点で生起した呼Ｃ4 に対
して、ｆ2 を割り当て理想的な距離での無線チャネルの
再利用が実現できるため、周波数利用効率が向上する。According to the present invention, as shown in FIG. 7, when the traffic is sparse, there is no channel whose free channel determination parameter is equal to or more than the required value and equal to or less than a fixed value. (Maximum) = A high-quality service can be provided by increasing the reuse interval. Further, when the traffic is dense, the operation is performed so that the free channel determination parameter is as large (small) as possible = the reuse interval is small, so that the frequency utilization efficiency can be improved (FIG. 8).
Further, in a system in which two usable channels are provided, when a call originates in each wireless zone in the order shown in FIG. 9 (the same order as in FIGS. 2 and 3), the traffic is sparse. Since the reuse interval is set as large as possible for the call C 2 generated at the time point, and f 2 is allocated, the call C 4 generated at the time point when the traffic becomes dense is assigned f 2 Since it is possible to reuse the wireless channel at an ideal distance, the frequency utilization efficiency is improved.
【図１】周波数の最短間隔繰り返し利用の説明図であ
る。FIG. 1 is an explanatory diagram of repeated use of a shortest frequency interval.
【図２】図１に示した制御手順で制御を行うことによ
り、呼の生起順序によって周波数利用効率が劣化した場
合の状況図である。FIG. 2 is a situation diagram in the case where the frequency utilization efficiency is deteriorated due to the call occurrence order by performing control in the control procedure shown in FIG.
【図３】図１に示した制御手順で制御を行うことによ
り、呼の生起手順によって周波数利用効率が劣化した場
合の状況図である。FIG. 3 is a situation diagram in the case where the frequency utilization efficiency is deteriorated by a call origination procedure by performing control by the control procedure shown in FIG. 1.
【図４】本発明の実施例１のように動作する移動通信シ
ステムの図である。FIG. 4 is a diagram of a mobile communication system that operates as in Example 1 of the present invention.
【図５】本発明の実施例１のフローチャートである。FIG. 5 is a flowchart of Embodiment 1 of the present invention.
【図６】本発明の実施例２のように動作する移動通信シ
ステムの図である。FIG. 6 is a diagram of a mobile communication system operating as in Example 2 of the present invention.
【図７】本発明のトラヒックが疎である状況での動作の
説明図である。FIG. 7 is an explanatory diagram of an operation of the present invention in a situation where traffic is sparse.
【図８】本発明のトラヒックが密である状況での動作の
説明図である。FIG. 8 is an explanatory diagram of an operation according to the present invention in a situation where traffic is dense.
【図９】図２と同じ順序で呼が生起した場合に本発明を
実施することによって、周波数利用効率の劣化を生じな
い例の状況説明図である。9 is a situation explanatory diagram of an example in which the frequency utilization efficiency is not deteriorated by implementing the present invention when a call occurs in the same order as in FIG. 2. FIG.
ｆi 周波数 Ｃi セルf i frequency C i cell
Claims (2)
通信可能な地域、即ち無線ゾーンに位置する無線端末と
により構成され、各無線基地局は、複数の無線チャネル
の使用が可能であり、前記無線基地局と前記無線端末と
の間で前記複数無線チャネルの中から通信に使用する無
線チャネルを選択して、通信を行う無線通信システムで
のチャネル割り当て方法において、 前記各無線基地局は、該無線基地局を中心とする無線ゾ
ーン内で呼が生起したとき、空きチャネルの干渉波受信
レベルの測定を行い、 上記測定結果が、通信に使用する無線チャネルに対する
干渉波受信レベルの所要品質基準を満たしている無線チ
ャネルからのみチャネル割り当てを行うものとし、 （ア）前記干渉波受信レベルが所要値以下であって一定
値以上の範囲内にある無線チャネルが１つ以上ある場
合、該無線チャネルのうち、該干渉波受信レベルが前記
所要値に最も近い、即ち該干渉波受信レベルが最大の無
線チャネルを割り当て、 （イ）前記干渉波受信レベルが前記範囲内にある無線チ
ャネルがない場合、該干渉波受信レベルが前記範囲から
最も離れた、即ち該干渉波受信レベルが最小の無線チャ
ネルを割り当てることを特徴とするチャネル割り当て方
法。1. A wireless base station comprising a plurality of wireless base stations and a wireless terminal located in an area communicable with the respective wireless base stations, that is, in a wireless zone , wherein each wireless base station can use a plurality of wireless channels. , and the said select a radio channel to be used for communication from among the plurality of radio channels between the radio base station and the radio terminal, the channel allocation method in a wireless communication system for performing communication, each wireless base When a call originates in the wireless zone centered on the wireless base station, the station receives the interference wave on the idle channel.
The level is measured, and the above measurement result shows that it is for the wireless channel used for communication.
Channel allocation shall be performed only from radio channels that meet the required quality standard of the interference wave reception level , and (a) the interference wave reception level is below the required value and constant.
When there is one or more radio channels within the range of the value or more, the interference wave reception level of the radio channels is
If a radio channel that is closest to the required value , that is, the interference wave reception level is the maximum, and (a) there is no radio channel having the interference wave reception level within the range, the interference wave reception level is obtained. farthest, i.e. channel assignment method which is characterized that you said interference wave receiving level is assigned a minimum radio tea <br/> channel but from the range.
通信可能な地域、即ち無線ゾーンに位置する無線端末と
により構成され、各無線基地局は、複数の無線チャネル
の使用が可能であり、前記無線基地局と前記無線端末と
の間で前記複数無線チャネルの中から通信に使用する無
線チャネルを選択して、通信を行う無線通信システムで
のチャネル割り当て方法において、 前記各無線基地局は、該無線基地局を中心とする無線ゾ
ーン内で呼が生起したとき、空きチャネルの希望波干渉
波受信電力比の測定を行い、 上記測定結果が、通信に使用する無線チャネルに対する
希望波干渉波受信電力比の所要品質基準を満たしている
無線チャネルからのみチャネル割り当てを行うものと
し、 （ア）前記希望波干渉波受信電力比が所要値以上であっ
て一定値以下の範囲内 にある無線チャネルが１つ以上あ
る場合、該無線チャネルのうち、該希望波干渉波受信電
力比が前記所要値に最も近い、即ち該希望波干渉波受信
電力比が最小の無線チャネルを割り当て、 （イ）前記希望波干渉波受信電力比が前記範囲内にある
無線チャネルがない場合、該希望波干渉波受信電力比が
前記範囲から最も離れた、即ち該希望波干渉波電力比が
最大のチャネルを割り当てることを特徴とするチャネル
割り当て方法。2. A plurality of radio base stations and a radio terminal located in an area communicable with each radio base station, that is, a radio zone, and each radio base station can use a plurality of radio channels. A channel allocation method in a wireless communication system for selecting a wireless channel to be used for communication from the plurality of wireless channels between the wireless base station and the wireless terminal, wherein: When a call originates in a radio zone centered on the radio base station, the station is required to interfere with the desired wave on an idle channel.
Wave reception power ratio is measured, and the above measurement results show the results for the wireless channel used for communication.
Channel allocation shall be performed only from radio channels that satisfy the required quality standard of the desired interference wave reception power ratio , and (a) the desired interference wave reception power ratio is greater than or equal to the required value.
Within the scope of the following constant value each case a radio channel is Ru least one Oh <br/>, among wireless channels, the desired wave interference wave receiving electric
The power ratio is closest to the required value, that is, the desired wave interference wave reception
When a wireless channel having a minimum power ratio is assigned, (a) when there is no wireless channel having the desired wave interference wave reception power ratio within the range, the desired wave interference wave reception power ratio is The farthest from the range , that is, the power ratio of the desired interference wave is
Channel assignment method which is characterized that you assign up channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03471795A JP3371389B2 (en) | 1995-02-01 | 1995-02-01 | Channel assignment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03471795A JP3371389B2 (en) | 1995-02-01 | 1995-02-01 | Channel assignment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08214360A JPH08214360A (en) | 1996-08-20 |
| JP3371389B2 true JP3371389B2 (en) | 2003-01-27 |
Family
ID=12422093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03471795A Expired - Fee Related JP3371389B2 (en) | 1995-02-01 | 1995-02-01 | Channel assignment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3371389B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100334775B1 (en) * | 2000-06-01 | 2002-05-03 | 윤종용 | Method for calculating number of effective traffic channel in coder mixed base station |
| US6859652B2 (en) | 2000-08-02 | 2005-02-22 | Mobile Satellite Ventures, Lp | Integrated or autonomous system and method of satellite-terrestrial frequency reuse using signal attenuation and/or blockage, dynamic assignment of frequencies and/or hysteresis |
| AU8468801A (en) | 2000-08-02 | 2002-02-13 | Mobiles Satellite Ventures Lp | Coordinated satellite-terrestrial frequency reuse |
| JP5345160B2 (en) | 2010-02-12 | 2013-11-20 | 株式会社エヌ・ティ・ティ・ドコモ | Signal sequence assignment apparatus and signal sequence assignment method |
-
1995
- 1995-02-01 JP JP03471795A patent/JP3371389B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08214360A (en) | 1996-08-20 |
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