JP2710179B2 - Channel assignment method for mobile communication system - Google Patents

Channel assignment method for mobile communication system

Info

Publication number
JP2710179B2
JP2710179B2 JP34562491A JP34562491A JP2710179B2 JP 2710179 B2 JP2710179 B2 JP 2710179B2 JP 34562491 A JP34562491 A JP 34562491A JP 34562491 A JP34562491 A JP 34562491A JP 2710179 B2 JP2710179 B2 JP 2710179B2
Authority
JP
Japan
Prior art keywords
channel
communication
base station
carrier frequency
mobile
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.)
Expired - Lifetime
Application number
JP34562491A
Other languages
Japanese (ja)
Other versions
JPH05211473A (en
Inventor
孝二郎 ▲浜▼辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP34562491A priority Critical patent/JP2710179B2/en
Priority to EP92109067A priority patent/EP0522276B1/en
Priority to EP01110095A priority patent/EP1133207A1/en
Priority to DE69233003T priority patent/DE69233003T2/en
Priority to EP96111685A priority patent/EP0740485A3/en
Publication of JPH05211473A publication Critical patent/JPH05211473A/en
Priority to US08/260,491 priority patent/US5507008A/en
Application granted granted Critical
Publication of JP2710179B2 publication Critical patent/JP2710179B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To prevent the effect of ternary inter-modulation and to improve the frequency utilization efficiency by using a call channel with high priority for the communication with a mobile station in the vicinity of a base station. CONSTITUTION:The mobile communication system consists of an exchange station 200, base stations 201, 202, mobile stations 203, 204 and other plural base stations and mobile stations, and the base station 201 (202) is provided to a cell 205 (206). When a call request is caused to the mobile station 203 resident in the cell 205 of the base station 201, a call channel in which a ratio of an incoming desired wave to interference power (Dup-UuP) in the base station 201 and a ratio of an outgoing desired wave to interference power (Ddown- Udown) in the mobile station 203 are a desired ratio or over is selected and used. All plural cells select the same call channel decided optionally at first and the call channel is sequentially selected from the channel in which a difference between the selected call channel carrier frequency and the carrier frequency is small.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、セルラー方式の移動通
信システムのチャネル割当方法に関する。
The present invention relates to a channel allocation method for a mobile communication system of a cellular scheme.

【0002】[0002]

【従来の技術】自動車電話システムのような大容量の移
動通信システムでは、サービスエリアを複数の基地局に
よりカバーし、干渉妨害の発生しない基地局間では同一
周波数チャネルを繰り返し利用することにより、周波数
の有効利用を図っている。このような方式はセルラー方
式と呼ばれている。
2. Description of the Related Art In a large-capacity mobile communication system such as an automobile telephone system, a service area is covered by a plurality of base stations, and a base station in which no interference is generated repeatedly uses the same frequency channel to thereby reduce the frequency. Is being used effectively. Such a system is called a cellular system.

【0003】各基地局で使用するチャネルの割当方式に
は、大きく分けて二通りの方式がある。一つの方式は、
伝搬特性の予測結果から予め干渉妨害が発生しないよう
に各基地局の使用チャネルを固定的に割り当てる方式で
あり、固定チャネル割当と呼ばれ、現行の自動車電話シ
ステムでは一般的な方式である。もう一つの方式は通信
毎に干渉妨害が発生しないチャネルを選んで使用するダ
イナミックチャネル割当と呼ばれる方式である。制御方
式や装置構成が複雑になるものの、干渉妨害が発生しな
い限りどのチャネルも自由に使用できるため、固定チャ
ネル割当に比べて収容可能な加入者数が多いという利点
があり、自動車電話システムにおいてもその採用が検討
されている。
There are roughly two types of channel allocation methods used in each base station. One method is
This is a system in which the channels used by each base station are fixedly allocated in advance so as not to cause interference from the prediction results of the propagation characteristics. This is called a fixed channel allocation and is a general system in the current mobile telephone system. Another method is a method called dynamic channel allocation in which a channel that does not cause interference is selected and used for each communication. Although the control method and device configuration are complicated, any channel can be used freely as long as interference does not occur.Therefore, there is an advantage that the number of subscribers that can be accommodated is larger than that of fixed channel allocation, and even in a car telephone system. Its adoption is under consideration.

【0004】ダイナミックチャネル割当方式において、
通話チャネルを選択するアルゴリズムとして様々な方式
が提案されている。特に周波数利用効率が高い方式とし
て、フレキシブルリユース方式が知られている(文献:
安田周二、尾上誠蔵、「移動通信方式」、特開平2−1
41036号公報、及びSeizo Onoe and
Syuji Yasuda,”Flexible R
e−use forDynamic Channel
Assignment in MobileRadio
Systems”,Conference Reco
rd ofIEEE ICC’89,Boston,J
une 1989.)。この方式は図4に示すように、
全ての空きチャネルに対して、各チャネルを使用した場
合の自ゾーンにおける下り希望波対干渉波電力比(以下
CIRとする)、自ゾーンにおける上り回線のCIR、
またそのチャネルを既に使用している他ゾーンにおける
上り回線のCIR、下り回線のCIRをそれぞれ求め、
各CIRが所要値を満足しかつその平均値が最小になる
チャネルを割り当てるものである。こうすることにより
同一周波数の繰り返し距離が短縮され、周波数利用効率
が向上する。
In the dynamic channel assignment method,
Various methods have been proposed as algorithms for selecting a communication channel. In particular, a flexible reuse scheme is known as a scheme having a high frequency use efficiency (literature:
Shuji Yasuda, Seizou Onoe, "Mobile Communication System", JP-A-2-1
No. 41036, Seiso Onoe and
Syuji Yasuda, "Flexible R
e-use for Dynamic Channel
Assignment in MobileRadio
Systems ", Conference Reco
rd of IEEE ICC'89, Boston, J
une 1989. ). This method, as shown in FIG.
For all vacant channels, the downlink desired signal to interference wave power ratio (hereinafter referred to as CIR) in the own zone when each channel is used, the uplink CIR in the own zone,
In addition, the CIR of the uplink and the CIR of the downlink in other zones that are already using the channel are obtained,
Each CIR assigns a channel that satisfies the required value and minimizes the average value. By doing so, the repetition distance of the same frequency is shortened, and the frequency use efficiency is improved.

【0005】この他、複数のセルにそれぞれ設けられた
基地局が、通話要求に対して、全通話チャネルの中から
同一の順序に従って通話チャネルを選択し、そのCIR
が所要値以上であった場合に通話チャネルを割り当てる
方式が考えられる。この方式によれば、基地局の近傍の
移動局に対しては、希望波レベルが十分大きいために干
渉波レベルの大きな優先度の高い通話チャネルが割り当
てられ、基地局から離れた移動局に対しては、希望波レ
ベルが小さいために干渉波レベルの小さい優先度の低い
通話チャネルが割り当てられるという傾向が生じる。従
って各通話チャネルを使用している基地局と移動局との
距離が同程度に揃うことになり、優先度の高いチャネル
は基地局近傍の移動局により頻繁に繰り返し使用され、
優先度の低いチャネルは基地局から離れた移動局により
大きな繰り返し間隔で使用されるという効率の良いチャ
ネル割当が実現する。
In addition, a base station provided in each of a plurality of cells selects a communication channel according to the same order from all communication channels in response to a communication request,
Is possible to allocate a communication channel when is greater than or equal to a required value. According to this method, the mobile station near the base station is assigned a high priority communication channel with a large interference wave level because the desired wave level is sufficiently large, and is assigned to a mobile station far from the base station. In other words, since the desired signal level is small, a tendency is made that a low-priority communication channel having a small interference signal level is assigned. Therefore, the distance between the base station and the mobile station using each communication channel will be substantially equal, and the channel with higher priority is frequently used repeatedly by the mobile station near the base station,
Efficient channel allocation is realized in which channels with lower priorities are used by mobile stations far from the base station at large repetition intervals.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、この方
式ではチャネルを選択する順序の決め方によっては、基
地局近傍の移動局が使用する優先度の高い通話チャネル
の相互作用によって3次相互変調波が、基地局から離れ
た移動局が使用する優先度の低い通話チャネルのキャリ
ア周波数上に生じるため、優先度の低い通話チャネルの
干渉波レベルが大きくなり、各通話チャネルを使用する
基地局と移動局の距離が同程度に揃いにくくなり、チャ
ネル割当の効率が低減するという問題点がある。
However, in this method, depending on how the order of selecting the channels is determined, the third-order intermodulation wave is generated by the interaction of the high-priority communication channels used by the mobile stations near the base station. Since it occurs on the carrier frequency of a low-priority speech channel used by a mobile station distant from the base station, the interference wave level of the low-priority speech channel increases, and the base station and mobile station that use each speech channel use There is a problem that the distances are hardly uniformed to the same extent, and the efficiency of channel allocation is reduced.

【0007】本発明の目的は上述の問題点を解決し、3
次相互変調の影響を受けにくく、周波数利用効率の高い
チャネル割当方法を提供することにある。
[0007] An object of the present invention is to solve the above-mentioned problems and to solve the above problem.
It is an object of the present invention to provide a channel allocation method which is hardly affected by secondary intermodulation and has high frequency use efficiency.

【0008】[0008]

【課題を解決するための手段】第一の発明のチャネル割
方法は、複数のセルにそれぞれ設けられた基地局が、
通話要求に対して、キャリアの周波数間隔が等しい複数
の通話チャネルの全ての中から通話チャネルを選択し、
前記通話チャネルにおける希望波対干渉波電力比が所要
値以上であった場合に、前記通話チャネルを割り当てる
セルラー方式の移動通信システムのチャネル割当方法
あって、前記複数の全てのセルが、任意に定めた同一の
通話チャネルを最初に選択し、その後選択された該通話
チャネルのキャリア周波数とキャリア周波数の差が小さ
いチャネルから順番に通話チャネルを選択することを特
徴とする。
According to a first aspect of the present invention, there is provided a channel allocating method , wherein base stations provided in a plurality of cells respectively include:
For a call request, select a communication channel from all of a plurality of communication channels having equal carrier frequency intervals,
When the desired wave-to-interference wave power ratio in the traffic channel is equal to or more than a required value, a channel allocation method for a cellular mobile communication system that allocates the traffic channel, wherein all of the plurality of cells are arbitrarily selected. It is characterized in that the same defined communication channel is selected first, and thereafter the communication channels are selected in order from the channel having the smaller carrier frequency of the selected communication channel.

【0009】第二の発明のチャネル割当方法は、前記任
意に定めた同一の通話チャネルを、キャリア周波数が最
も高い通話チャネルとしたことを特徴とする。
[0009] A channel assignment method according to a second aspect of the present invention is characterized in that the arbitrarily determined same traffic channel is a traffic channel having the highest carrier frequency.

【0010】第三の発明のチャネル割当方法は、前記任
意に定めた同一の通話チャネルを、キャリア周波数が最
も低い通話チャネルとしたことを特徴とする。
[0010] A third aspect of the present invention is the channel allocation method , wherein the arbitrarily determined same communication channel is a communication channel having the lowest carrier frequency.

【0011】第四の発明のチャネル割当方法は、複数の
セルにそれぞれ設けられた基地局が、通話要求に対し
て、キャリアの周波数間隔が等しい複数の通話チャネル
の全ての中から通話チャネルを選択し、前記通話チャネ
ルにおける希望波対干渉波電力比が所要値以上であった
場合に、前記通話チャネルを割り当てるセルラー方式の
移動通信システムのチャネル割当方法であって、前記複
数の全てのセルが、全チャネルのキャリア周波数の中央
値とキャリア周波数の差が大きいチャネルから順番に通
話チャネルを選択することを特徴とする。
[0011] channel assignment method of the fourth invention, selected base station provided in each of a plurality of cells, relative to the call request, all speech channels from a plurality of speech channels frequency interval is equal to the carrier Then, when the desired wave-to-interference wave power ratio in the traffic channel is equal to or greater than a required value, a channel allocation method for a cellular mobile communication system that allocates the traffic channel, wherein the plurality of all cells are It is characterized in that the communication channels are selected in order from the channel having the largest difference between the carrier value and the median value of the carrier frequencies of all the channels.

【0012】[0012]

【作用】相互変調には基地局、移動局それぞれに送信相
互変調と受信相互変調がある。高レベルの受信相互変調
が生じたり、高レベルの送信相互変調が受信されるの
は、基地局近傍に移動局があるときである。第一の発
明、第二の発明のいずれの発明によっても、基地局近傍
の移動局との通信には優先度の高い通話チャネルを使う
ことが多く、それらの通話チャネルのキャリア周波数間
隔は狭くなるので、2波で生じる相互変調、3波で生じ
る相互変調とも、高レベルの相互変調は優先度の高いチ
ャネルのキャリア周波数に近い周波数上に発生すること
が多くなる。優先度の高いチャネルのキャリア周波数に
近い周波数上の通話チャネルは比較的優先度が高くなっ
ているので、優先度の高い通話チャネルの相互変調波の
レベルは高く、優先度が低い通話チャネルの相互変調波
のレベルは低くなる。このようにして優先度の高いチャ
ネルは基地局近傍の移動局により頻繁に繰り返し使用さ
れ、優先度の低いチャネルは基地局から離れた移動局に
より大きな繰り返し間隔で使用されるという効率の良い
チャネル割当が実現する。
The intermodulation includes transmission intermodulation and reception intermodulation for the base station and the mobile station, respectively. A high level of receive intermodulation or a high level of transmit intermodulation is received when a mobile station is near the base station. According to any of the first and second inventions, communication with a mobile station near a base station often uses a high-priority communication channel, and the carrier frequency interval between these communication channels is reduced. Therefore, in the case of the intermodulation generated by two waves and the intermodulation generated by three waves, high-level intermodulation often occurs on a frequency close to the carrier frequency of the channel with higher priority. Since the speech channel on the frequency close to the carrier frequency of the channel with higher priority has relatively higher priority, the level of the intermodulation wave of the speech channel with higher priority is higher and that of the speech channel with lower priority is higher. The level of the modulated wave becomes lower. In this way, a high-priority channel is frequently used repeatedly by mobile stations near the base station, and a low-priority channel is used by mobile stations far from the base station at a large repetition interval. Is realized.

【0013】さらに第二・第三の発明では、最も優先度
の高いチャネルのキャリア周波数が周波数軸上で端にな
っているので、そのチャネルとの相互作用によって生じ
る高レベルの3次相互変調のうち半分は通話チャネルが
存在しない周波数上に生じ、通話チャネルは相互変調の
影響を受けにくい。
Further, in the second and third inventions, since the carrier frequency of the channel with the highest priority is at the end on the frequency axis, the high-level third-order intermodulation caused by the interaction with the channel is performed. Half of them occur on frequencies where there is no traffic channel, and the traffic channel is less susceptible to intermodulation.

【0014】第四の発明では、優先度の高い通話チャネ
ルは周波数軸上で両端に集まっているため、優先度の高
い2つの通話チャネルで生じる相互変調は、通話チャネ
ルが存在しない周波数上に生じることが多いため、通話
チャネルは相互変調の影響を受けにくい。また3つの通
話チャネルで生じる相互変調はチャネルが存在する周波
数範囲に生じる場合でも、周波数軸上の両端近くにある
比較的優先度が高いチャネルのキャリア周波数上に生じ
ることが多い。このため第一、第二および第三の発明と
同様に優先度の低いチャネルは基地局から離れた移動局
により大きな繰り返し間隔で使用されるという効率の良
いチャネル割当が実現する。
In the fourth invention, since the high-priority speech channels are located at both ends on the frequency axis, the intermodulation occurring in the two high-priority speech channels occurs on a frequency where no speech channel exists. In many cases, the speech channel is less susceptible to intermodulation. Further, even when the intermodulation occurring in the three speech channels occurs in the frequency range where the channels exist, it often occurs on the carrier frequency of a relatively high priority channel near both ends on the frequency axis. Therefore, similarly to the first, second, and third inventions, an efficient channel allocation is realized in which a channel with a low priority is used at a large repetition interval by a mobile station distant from the base station.

【0015】[0015]

【実施例】次に図面を参照して本発明について詳細に説
明する。なお、以下の説明では通話チャネル選択の優先
度を#で示す。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings. In the following description, the priority of communication channel selection is indicated by #.

【0016】図3は、本発明のチャネル割当方法が用い
られる移動通信システムの構成例を示している。この移
動通信システムは、交換局200、基地局201、20
2、他の複数の基地局、移動局203、204、他の複
数の移動局から構成され、セル205、セル206に基
地局201、基地局202が設けられている。また、D
up、Uup、Ddown、Udownはそれぞれ、基
地局201における上り希望波レベル、基地局201に
おける上り干渉波レベル、移動局203における下り希
望波レベル、移動局203における下り干渉波レベルで
ある。基地局201のセルに在圏する移動局203に通
話要求が発生した場合、基地局201における上り希望
波対干渉波電力比(Dup−Uup)及び移動局203
における下り希望波対干渉波電力比(Ddown−Ud
own)が所要値以上となる通話チャネルを選んで使用
する。
FIG. 3 shows a configuration example of a mobile communication system in which the channel assignment method of the present invention is used. This mobile communication system includes an exchange 200, base stations 201 and 20.
2. It is composed of another plurality of base stations, mobile stations 203 and 204, and another plurality of mobile stations, and a base station 201 and a base station 202 are provided in a cell 205 and a cell 206. Also, D
Up, Up, Ddown, and Down are a desired uplink wave level at the base station 201, an uplink interference wave level at the base station 201, a downlink desired wave level at the mobile station 203, and a downlink interference wave level at the mobile station 203, respectively. When a call request is issued to the mobile station 203 located in the cell of the base station 201, the uplink desired wave-to-interference wave power ratio (Dup-Up) at the base station 201 and the mobile station 203
Down-desired-to-interference-wave power ratio (Ddown-Ud)
The communication channel whose own (own) is equal to or more than a required value is selected and used.

【0017】図2は、本発明のチャネル割当方法を実現
する基地局の制御を説明するための流れ図である。基地
局は、定期的に空き通話チャネルの干渉波レベルUup
(i)を受信し記憶している。また移動局の送信電力
(以下PMSと省略)及び基地局の送信電力(以下PB
Sと省略)は既知であるとする。
FIG. 2 is a flowchart for explaining control of a base station for realizing the channel assignment method of the present invention. The base station periodically checks the interference wave level Up of the idle communication channel.
(I) is received and stored. Also, the transmission power of the mobile station (hereinafter abbreviated as PMS) and the transmission power of the base station (hereinafter PB)
S is abbreviated).

【0018】通話要求が発生した場合、基地局は制御チ
ャネルで受信した発呼要求信号(移動局発呼の場合)ま
たは呼出応答信号(移動局着呼の場合)の受信レベル
を、上り希望波レベル(Dup)として記憶する(図1
ステップ100)。次にPMSからDupを引いた値
を、基地局−移動局間の伝搬損(以下Lと省略)とする
(ステップ101)。上り回線と下り回線には可逆性が
成立ち、伝搬損Lは同一と考えられるから、PBSから
Lを引くことにより移動局における下り希望波レベル
(Ddown)を求めることができる(ステップ10
2)。ここで通話チャネルを識別するパラメータiを1
に設定して(ステップ103)、Dupから通話チャネ
ル#1の上り干渉波レベルUup(1)を引いた値即ち
上り希望波対干渉波電力比と所要値(以下CIRthと
省略する)とを比較する(ステップ104)。上り希望
波対干渉波電力比がCIRth以上の場合、基地局は移
動局に通話チャネル#1の下り干渉波レベルUdown
(1)の測定を指定し、結果を移動局から受け取る(ス
テップ105)。そしてDdownからUdown
(1)を引いた値即ち下り希望波対干渉波電力比とCI
Rthとを比較する(ステップ106)。その結果、下
り希望波対干渉波電力比もCIRth以上であれば、通
話チャネル#1を通話要求に対して割り当てる(ステッ
プ107)。通話チャネル#1の上り希望波対干渉波電
力比または下り希望波対干渉波電力比がCIRth未満
の場合、パラメータiに1を加え次のチャネル#2を選
択し(ステップ109)、以下同様に104〜106を
繰り返すことにより干渉条件の判定を行う。最後の通話
チャネル#nに対して判定を行ったが(ステップ10
8)、使用可能な通話チャネルが見つからなかった場合
には、呼損となる(ステップ110)。
When a call request occurs, the base station changes the reception level of a call request signal (for a mobile station call) or a paging response signal (for a mobile station call) received on the control channel to an uplink desired signal. It is stored as a level (Dup) (FIG. 1
Step 100). Next, a value obtained by subtracting Dup from the PMS is defined as a propagation loss (hereinafter abbreviated as L) between the base station and the mobile station (step 101). Since reversibility is established between the uplink and the downlink and the propagation loss L is considered to be the same, the desired downlink level (Ddown) at the mobile station can be obtained by subtracting L from the PBS (step 10).
2). Here, the parameter i for identifying the communication channel is set to 1
(Step 103), and a value obtained by subtracting the uplink interference wave level Up (1) of the communication channel # 1 from Dup, that is, the uplink desired wave-to-interference wave power ratio and a required value (hereinafter abbreviated as CIRth) are compared. (Step 104). When the uplink desired wave-to-interference wave power ratio is equal to or more than CIRth, the base station informs the mobile station of the downlink interference wave level Udown of speech channel # 1.
The measurement of (1) is designated, and the result is received from the mobile station (step 105). And from Ddown to Udown
The value obtained by subtracting (1), that is, the ratio of the downlink desired signal to the interference signal power and CI
Rth is compared (step 106). As a result, if the downlink desired wave-to-interference wave power ratio is also equal to or more than CIRth, the communication channel # 1 is allocated to the communication request (step 107). If the uplink desired wave to interference wave power ratio or the downlink desired wave to interference wave power ratio of the communication channel # 1 is less than CIRth, 1 is added to the parameter i to select the next channel # 2 (step 109), and so on. The interference condition is determined by repeating steps 104 to 106. The determination is made for the last communication channel #n (step 10).
8) If no usable communication channel is found, a call loss occurs (step 110).

【0019】各基地局において、この流れ図に従って通
話チャネル#1から優先的に選択を行えば、優先度の高
いチャネルは基地局近傍の移動局により頻繁に繰り返し
使用され、優先度の低いチャネルは基地局から離れた移
動局により大きな繰り返し間隔で使用されるという周波
数利用効率の高いチャネル割当を実現することができ
る。
If each base station preferentially selects from the communication channel # 1 according to this flowchart, the high priority channel is frequently used repeatedly by mobile stations near the base station, and the low priority channel is used by the base station. Channel allocation with high frequency use efficiency, which is used by mobile stations far from the station at a large repetition interval, can be realized.

【0020】図1(a)は第一の発明、図1(b)は第
二の発明、第1(c)は第三の発明、図1(d)は第四
の発明のチャネル割当方法における通話チャネルの選択
順序の例をそれぞれ示す図である。
FIG. 1 (a) is the first invention, FIG. 1 (b) is the second invention, 1 (c) is the third invention, and FIG. 1 (d) is the channel assignment method of the fourth invention. FIG. 5 is a diagram showing an example of a communication channel selection order in FIG.

【0021】この通話チャネルの選択順序は以下のよう
にして決定する。
The selection order of the communication channels is determined as follows.

【0022】第一の発明では、最初に選択する通話チャ
ネル、即ち優先度#1の通話チャネルを任意に決める。
図1(a)の例では、これをf4 とした。#2の通話チ
ャネルは、#1のキャリア周波数f4 との周波数差が最
も小さいf3 またはf5 である。周波数差が等しい通話
チャネルが複数あるときはどちらの優先度を高くしても
よいが、この例では#2をf3 とした。#3はf4 との
周波数差が等しいf5となり、以下同様に#4と#5は
3 〜f5 以外の通話チャネルのうちf4 と最も周波数
差が小さいf2 とf6 、#6,#7はf1 ,f7 、#8
はf8 、#9はf9 、#10はf1 0 となる。
In the first invention, a communication channel to be selected first, that is, a communication channel of priority # 1 is arbitrarily determined.
In the example of FIG. 1 (a), which was used as f 4. # 2 of the speech channel, the frequency difference between the carrier frequency f 4 of # 1 is the smallest f 3 or f 5. When the traffic channel frequency difference equal there are a plurality may be increased either priority, but the # 2 was f 3 in this example. # 3 becomes f 5 frequency difference is equal to the f 4, hereinafter similarly # 4 and # 5 and f 2 the most frequency difference is small and f 4 of the communication channel other than f 3 ~f 5 f 6, # 6, # 7 f 1, f 7, # 8
Is f 8, # 9 is f 9, # 10 becomes f 1 0.

【0023】第二の発明では、キャリア周波数が最も高
い通話チャネルf1 0 を#1とする。図1(b)の例で
はf1 0 を#1としたものである。このとき#2はf
1 0 とキャリア周波数差が最も小さいf9 となり、#3
はその次にf1 0 とキャリア周波数差が小さいf8 とな
る。以下同様に優先度が決まり、#10はf1 となる。
In the second invention, the communication channel f 10 having the highest carrier frequency is defined as # 1. In the example shown in FIG. 1 (b) is obtained by the # 1 f 1 0. At this time, # 2 is f
Smallest f 9 becomes 1 0 and the carrier frequency difference, # 3
Becomes f 8 f 1 0 and the carrier frequency difference is small the next. Hereinafter similarly determines priorities, # 10 will be f 1.

【0024】第三の発明では、キャリア周波数が最も低
い通話チャネルf1 を#1とする。図1(c)の例はf
1 を#1としたものである。このとき#2はf1 とキャ
リア周波数差が最も小さいf2 となり、#3はその次に
1 とキャリア周波数差が小さいf3 となる。以下同様
に優先度が決まり、#10はf1 0 となる。
[0024] In a third invention, the lowest traffic channel f 1 is the carrier frequency and # 1. The example in FIG.
1 is # 1. In this case # 2 is the smallest f 2 becomes f 1 and a carrier frequency difference, # 3 f 1 and a carrier frequency difference is small f 3 to the next. Hereinafter similarly determines priorities, # 10 becomes f 1 0.

【0025】第四の発明では全通話チャネルのキャリア
周波数の中央値とキャリア周波数の差が大きい通話チャ
ネルから順番に優先度を定める。図1(d)の例のよう
に全通話チャネルをf1 ,f2 ,…,f1 0 とすると、
キャリア周波数の中央値は(f1 +f1 0 )/2とな
る。この中央値とキャリア周波数差が最も大きいのはf
1 とf1 0 である。周波数が等しい通話チャネルが2つ
ある場合にはどちらも#1としてもよいが、図1(d)
の例ではf1 を#1とした。従って#2はf1 0とな
る。f1 とf1 0 の次に中央値とのキャリア周波数差が
大きいのはf2 とf9 であるので、これらが#3,#4
となる。以下同様に優先度を定めると#9,#10はf
5 ,f6 となる。
In the fourth invention, the priority is determined in order from the communication channel having the largest difference between the median carrier frequency and the carrier frequency of all the communication channels. Assuming that all communication channels are f 1 , f 2 ,..., F 10 as in the example of FIG.
The median value of the carrier frequency is (f 1 + f 10 ) / 2. The largest difference between the median and the carrier frequency is f
1 and f 1 is 0. When there are two communication channels having the same frequency, both may be # 1, but FIG. 1 (d)
It was the # 1 f 1 in the example. Therefore # 2 becomes f 1 0. Since the carrier frequency difference between the next to the central value of f 1 and f 1 0 is large is f 2 and f 9, they are # 3, # 4
Becomes In the same manner, when the priorities are determined similarly, # 9 and # 10 are f
5 and f 6 .

【0026】図1(a)に示す第一の発明の順序で通話
チャネルを選択すると、優先度#1、#2であるf4
3 が基地局近傍で使われるようになる。この2つの周
波数によって生じる3次相互変調は2f3 −f4 =f2
と2f4 −f3 =f5 である。f2 は#4、f5 は#3
であり、優先度が高く、比較的基地局近くで使われるこ
とが多いため、希望波、干渉波のレベルがともに高く、
相互変調の影響を受けにくい。
[0026] Figure 1 Selecting order on the traffic channel of the first invention shown in (a), priority # 1, # 2 a is f 4 and f 3 is as used in the base station neighborhood. The third-order intermodulation caused by these two frequencies is 2f 3 −f 4 = f 2
And 2f is a 4 -f 3 = f 5. f 2 is # 4, f 5 is # 3
Since the priority is high, and it is often used relatively near the base station, the level of the desired wave and the interference wave are both high,
Less susceptible to intermodulation.

【0027】同様に図1(b)に示す第二の発明の順序
で通話チャネルを選択すると、優先度#1、#2である
1 0 とf9 が基地局近傍で使われるようになる。この
2つの周波数によって生じる3次相互変調は2f9 −f
1 0 =f8 であり、これは#3と優先度が高く、比較的
基地局近くで使われることが多いため、希望波、干渉波
のレベルがともに高く、相互変調の影響を受けにくい。
[0027] By selecting the communication channel in order likewise the second invention shown in FIG. 1 (b), so that priority # 1, f 1 0 and f 9 is # 2 is used in the base station neighborhood . The third-order intermodulation caused by these two frequencies is 2f 9 -f
A 1 0 = f 8, which is # 3 and the priority is high, because it is often used near a relatively base station, the desired wave, the level of the interference wave are both high, less sensitive to intermodulation.

【0028】同様に図1(c)に示す第三の発明の順序
で通話チャネルを選択すると、優先度#1、#2である
1 とf2 が基地局近傍で使われるようになる。この2
つの周波数によって生じる3次相互変調は2f2 −f1
=f3 であり、これは#3と優先度が高く、比較的基地
局近くで使われることが多いため、希望波、干渉波のレ
ベルがともに高く、相互変調の影響を受けにくい。
[0028] By selecting the order in traffic channel likewise the third invention shown in FIG. 1 (c), priority # 1, # 2 a is f 1 and f 2 become as used in the base station neighborhood. This 2
The third order intermodulation caused by the two frequencies is 2f 2 −f 1
= F 3 , which has a high priority of # 3 and is often used relatively near the base station, so that the levels of the desired wave and the interference wave are both high and are not easily affected by intermodulation.

【0029】さらに図1(d)に示す第四の発明の順序
で通話チャネルを選択すると、優先度#1、#2である
1 とf1 0 で生じる3次相互変調は2f1 0 −f1
10 であり、通話チャネルの存在範囲外になり、3次
相互変調の影響は受けにくい。また優先度#1、#2、
#3であるf1 ,f1 0 ,f2 の3波で生じる3次相互
変調はf1 +f1 0 −f2 =f9 であり、これは#4と
優先度が高く、比較的基地局近くで使われることが多い
ため、希望波、干渉波のレベルがともに高く、相互変調
の影響を受けにくい。
[0029] With further select the order in the traffic channel of the fourth invention shown in FIG. 1 (d), priority # 1, # 3 order intermodulation occurring at f 1 and f 1 0 is 2 2f 1 0 - f 1 >
is f 10, are outside the existence range of the traffic channel, third order intermodulation effects less subject. Also, priority # 1, # 2,
# 3 order intermodulation occurring in three waves of f 1, f 1 0, f 2 is 3 is f 1 + f 1 0 -f 2 = f 9, which is # 4 and the priority is high, relatively Base Since it is often used near a station, the levels of the desired wave and the interference wave are both high and are not easily affected by intermodulation.

【0030】従って、これらの方法によって通話チャネ
ル選択順序を決めておけば、相互変調の影響を殆ど受け
ることなく、以上に述べた方法で周波数利用効率の高い
チャネル割当を実現できる。
Therefore, if the communication channel selection order is determined by these methods, channel allocation with high frequency use efficiency can be realized by the above-described method without being affected by intermodulation.

【0031】以上、実施例をもって本発明を詳細に説明
したが、本発明はこの実施例のみに限定されるものでは
ない。たとえば、実施例ではFDMA方式を用いて説明
したが、これはマルチキャリアのTDMA方式でも支障
なく実施することができる。図5に例として第二の発明
の実施例を2つ示す。
Although the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the embodiments. For example, although the embodiment has been described using the FDMA system, this can be implemented without any problem even in a multi-carrier TDMA system. FIG. 5 shows two embodiments of the second invention as examples.

【0032】図5は3チャネルのTDMAでキャリア周
波数が5つある場合である。第二の発明でキャリア周波
数f5 の優先度を最も高くすると、キャリア周波数の優
先度は以下、順にf4 ,f3 ,f2 ,f1 となる。同じ
キャリア周波数上の3つの通話チャネルはキャリア周波
数の差が0であるので、それらの優先度は任意に決めて
よいが、図5(a)は全てのキャリア周波数でスロット
1、スロット2、スロット3の順で優先度を高くした通
話チャネルの選択順序であり、図5(b)は隣接するキ
ャリア周波数の間ではスロットの優先度が逆になるよう
にした通話チャネルの選択順序である。
FIG. 5 shows a case where there are five carrier frequencies in three-channel TDMA. When the highest priority carrier frequency f 5 in the second invention, the priority of the carrier frequency is hereinafter sequentially it becomes f 4, f 3, f 2 , f 1. Since the difference between the carrier frequencies of the three communication channels on the same carrier frequency is 0, their priorities may be arbitrarily determined. However, FIG. FIG. 5B shows a selection order of the communication channels in which the priority of the slot is reversed between adjacent carrier frequencies.

【0033】[0033]

【発明の効果】以上詳細に説明したように本発明によれ
ば、3次相互変調の影響を受けにくく、周波数利用効率
の高いチャネル割当方法を提供する。
As described above in detail, according to the present invention, there is provided a channel allocation method which is hardly affected by third-order intermodulation and has high frequency use efficiency.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明のチャネル割当方法における通話チャネ
ルの選択順序の実施例を示す図。
FIG. 1 is a diagram showing an embodiment of a communication channel selection order in a channel assignment method according to the present invention.

【図2】本発明のチャネル割当方法を実施する基地局の
制御を説明するための流れ図。
FIG. 2 is a flowchart illustrating control of a base station that implements the channel assignment method of the present invention.

【図3】通信移動システムの構成例を示す図。FIG. 3 is a diagram showing a configuration example of a communication mobile system.

【図4】従来の技術におけるフレキシブルリユース方式
を説明するための流れ図。
FIG. 4 is a flowchart for explaining a flexible reuse method in the related art.

【図5】マルチキャリアのTDMA方式における本発明
の通話チャネル選択順序の実施例を示す図。
FIG. 5 is a diagram showing an embodiment of a communication channel selection order according to the present invention in a multicarrier TDMA system.

【符号の説明】[Explanation of symbols]

100 上り希望波レベルの測定 101、102 下り希望波レベルの測定 103 選択通話チャネルの初期値の設定 104、105、106 希望波対干渉波電力比の測定 109 選択通話チャネルの更新 200 交換局 201、202 基地局 203、204 移動局 205、206 セル Reference Signs List 100 Measurement of desired uplink signal level 101, 102 Measurement of desired downlink signal level 103 Initial value setting of selected communication channel 104, 105, 106 Measurement of desired signal to interference power ratio 109 Update of selected communication channel 200 Exchange 201, 202 base station 203, 204 mobile station 205, 206 cell

Claims (4)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】複数のセルにそれぞれ設けられた基地局
が、通話要求に対して、キャリアの周波数間隔が等しい
複数の通話チャネルの全ての中から通話チャネルを選択
し、前記通話チャネルにおける希望波対干渉波電力比が
所要値以上であった場合に、前記通信チャネルを割り当
てるセルラー方式の移動通信システムのチャネル割当
であって、前記複数の全てのセルが、任意に定めた同
一の通話チャネルを最初に選択し、その後選択された該
通話チャネルのャリア周波数とキャリア周波数の差が
小さいチャネルから順番に通話チャネルを選択すること
を特徴とする移動通信システムのチャネル割当方法
A base station provided in each of a plurality of cells selects a communication channel from all of a plurality of communication channels having equal carrier frequency intervals in response to a communication request, and selects a desired signal in the communication channel. If interference power ratio is equal to or more than the required value, the channel allocation side of the mobile communication system of the cellular system allocates the communication channel
A law, the plurality of all cells, calls in order from first select the same communication channel as defined in any subsequently selected vent talk channel career frequency and difference of the carrier frequency is smaller channels A channel allocation method for a mobile communication system, comprising selecting a channel.
【請求項2】前記任意に定めた同一の通話チャネルを、
キャリア周波数が最も高い通話チャネルとしたことを特
徴とする請求項1記載の移動通信システムのチャネル割
方法
2. The arbitrarily defined same communication channel,
2. The channel allocation method for a mobile communication system according to claim 1, wherein the communication channel has the highest carrier frequency.
【請求項3】前記任意に定めた同一の通話チャネルを、
キャリア周波数が最も低い通話チャネルとしたことを特
徴とする請求項1記載の移動通信システムのチャネル割
方法
3. An arbitrarily defined identical communication channel,
2. The channel allocation method for a mobile communication system according to claim 1, wherein the communication channel has the lowest carrier frequency.
【請求項4】複数のセルにそれぞれ設けられた基地局
が、通話要求に対して、キャリアの周波数間隔が等しい
複数の通話チャネルの全ての中から通話チャネルを選択
し、前記通話チャネルにおける希望波対干渉波電力比が
所要値以上であった場合に、前記通話チャネルを割り当
てるセルラー方式の移動通信システムのチャネル割当
であって、前記複数の全てのセルが、全チャネルのキ
ャリア周波数の中央値とキャリア周波数の差が大きいチ
ャネルから順番に通話チャネルを選択することを特徴と
する移動通信システムのチャネル割当方法
4. A base station provided in each of a plurality of cells selects a communication channel from all of a plurality of communication channels having equal carrier frequency intervals in response to a communication request, and selects a desired signal in the communication channel. If interference power ratio is equal to or more than the required value, the channel allocation side of the mobile communication system of the cellular system allocates the speech channels
A law, all cells of the plurality of channel assignment method for a mobile communication system and selects a communication channel in order from the channel difference is large median and the carrier frequency of the carrier frequency of all the channels.
JP34562491A 1991-05-29 1991-12-26 Channel assignment method for mobile communication system Expired - Lifetime JP2710179B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP34562491A JP2710179B2 (en) 1991-12-26 1991-12-26 Channel assignment method for mobile communication system
EP92109067A EP0522276B1 (en) 1991-05-29 1992-05-29 Channel assignment method in mobile communication system
EP01110095A EP1133207A1 (en) 1991-05-29 1992-05-29 Channel assignment method in mobile communication system
DE69233003T DE69233003T2 (en) 1991-05-29 1992-05-29 Channel assignment method in mobile communication system
EP96111685A EP0740485A3 (en) 1991-05-29 1992-05-29 Channel assignment method for a mobile communication system
US08/260,491 US5507008A (en) 1991-05-29 1994-06-15 Channel assignment method in mobile communication system in which channel which meets predetermined criteria is channel selected

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34562491A JP2710179B2 (en) 1991-12-26 1991-12-26 Channel assignment method for mobile communication system

Publications (2)

Publication Number Publication Date
JPH05211473A JPH05211473A (en) 1993-08-20
JP2710179B2 true JP2710179B2 (en) 1998-02-10

Family

ID=18377865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34562491A Expired - Lifetime JP2710179B2 (en) 1991-05-29 1991-12-26 Channel assignment method for mobile communication system

Country Status (1)

Country Link
JP (1) JP2710179B2 (en)

Also Published As

Publication number Publication date
JPH05211473A (en) 1993-08-20

Similar Documents

Publication Publication Date Title
JP2616244B2 (en) Channel allocation method for mobile communication system
RU2121238C1 (en) Method and system of assignment of communication channel in system of cellular radio communication
US5371780A (en) Communications resource assignment in a wireless telecommunications system
Del Re et al. Handover and dynamic channel allocation techniques in mobile cellular networks
KR100331006B1 (en) Channel dynamic allocation method and wireless communication network
Zeng et al. Performance analysis of mobile cellular radio system with priority reservation handoff procedures
US20130182565A1 (en) Systems and methods for resource allocation serving communication requirements and fairness
JPH05292010A (en) Method and device for assigning radio channel
US20060126546A1 (en) Enhanced hybrid duplexing technology-based wireless communication system
KR20010070186A (en) Method, base station and mobile station for timeslot selection and timeslot assignment
US6466795B1 (en) Method for improving resource allocation in a wireless communications system using broadcast resource information
US6047187A (en) Stabilized control channel planning using loosely coupled dedicated traffic channels
JP2606678B2 (en) Channel allocation method in mobile communication system
JP5161979B2 (en) Base station for wireless communication system
EP0545533A2 (en) Communications resource assignment in a wireless telecommunications system
JP4278530B2 (en) Code division multiplexing communication system and frequency allocation method thereof
KR100630180B1 (en) Methode and system of comprising cell for minimizing interference among cells and channel assigning method thereof
JPH1013937A (en) Call reception control method of mobile communication
JP3110202B2 (en) Frequency reuse method
JP2710179B2 (en) Channel assignment method for mobile communication system
JP2794980B2 (en) Channel allocation method for mobile communication system
JP2697409B2 (en) Channel allocation method for mobile communication system
JP2699854B2 (en) Channel allocation method for mobile communication system
JP2570132B2 (en) Mobile communication system
JP2608857B2 (en) Channel assignment method

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19970924