JPH09307495A - Satellite line assigning system - Google Patents
Satellite line assigning systemInfo
- Publication number
- JPH09307495A JPH09307495A JP12008796A JP12008796A JPH09307495A JP H09307495 A JPH09307495 A JP H09307495A JP 12008796 A JP12008796 A JP 12008796A JP 12008796 A JP12008796 A JP 12008796A JP H09307495 A JPH09307495 A JP H09307495A
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- Prior art keywords
- data
- earth
- waiting time
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- satellite
- 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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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は衛星通信における複
数の地球局間での衛星回線割当方式に関し、特にコンピ
ュータ間のファイル転送等のような大量のデータを比較
的長い時間をかけて衛星回線で伝送する場合における待
ち時間の短縮、平均化を図った衛星回線割当方式に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite line allocating method between a plurality of earth stations in satellite communication, and particularly, to transfer a large amount of data such as file transfer between computers over a satellite line over a relatively long time. The present invention relates to a satellite channel allocation method that shortens and averages waiting time during transmission.
【0002】[0002]
【従来の技術】従来から複数の地球局間での衛星回線割
当技術として種々のものが提案されている。例えば、特
開平3−088434号公報では、ランダムアクセス予
約複合方式と固定割当方式とを統合し、データの発生頻
度や1送信当たりの発生データ量が異なる端末を収容す
ることにより、多様なサービスを提供することを可能に
した衛星通信方式が提案されている。また、特開昭63
−084211号公報では、予約領域の予約スロットを
端末グループ毎に割当て、予約領域にフリー領域を設
け、親局では予約領域を管理するテーブルを設けて回線
割当処理を行うことにより、予約スロット数を低減する
回線制御方式が提案されている。さらに、特開昭63−
067926号公報では、地球局の数と同じ予約スロッ
トと、これより少ないデータスロットを持ち、送信すべ
き残りの情報量と送信待ちによって生じる架空の情報量
が多いものから順に回線を割り当てることにより、呼を
発生した地球局に、トラフィック量に関係なく回線を公
平に割り当てる衛星回線割当方式が提案されている。2. Description of the Related Art Conventionally, various techniques have been proposed for allocating satellite links between a plurality of earth stations. For example, in Japanese Unexamined Patent Publication No. 3-088434, a random access reservation composite method and a fixed allocation method are integrated, and by accommodating terminals having different data generation frequencies and generated data amounts per transmission, various services can be provided. A satellite communication system that has made it possible to provide is proposed. Also, JP-A-63
According to Japanese Patent Laid-Open No. 084211, the number of reserved slots is determined by allocating a reserved slot in the reserved area for each terminal group, providing a free area in the reserved area, and providing a table for managing the reserved area in the master station to perform line allocation processing. A line control method for reducing the number has been proposed. Further, JP-A-63-
In the 067926 publication, by allocating lines in order from the one having the same reservation slots as the number of earth stations and the data slots smaller than this, and the remaining information amount to be transmitted and the fictitious information amount caused by transmission waiting, in order. A satellite line assignment method has been proposed in which lines are fairly assigned to the earth station that originated a call regardless of the traffic volume.
【0003】また、特開昭61−281727号公報で
は、適応型DAMA方式において、各子局から通知され
た呼量を基にして全体をトラフィック量を予測し、各子
局への割当回線数を決定して指定することにより、接続
遅延を無くし、かつ回線使用効率を高める適応型DAM
A方式が提案されている。さらに、特開昭57−037
938号公報では、衛星通信回線において、送りたい情
報を有する地球局が予約スロット数を記載した予約バー
ストに最優先局表示を付加して送出することにより、バ
ーストの衝突を防ぎ衛星利用率の向上を図る予約方式が
提案されている。Further, in Japanese Patent Laid-Open No. 61-281727, in the adaptive DAMA system, the traffic volume is predicted for the whole based on the call volume notified from each slave station, and the number of allocated lines to each slave station is calculated. An adaptive DAM that eliminates connection delays and improves line utilization efficiency by determining and specifying
Method A has been proposed. Further, JP-A-57-037
According to Japanese Patent No. 938, in a satellite communication line, an earth station having information to be sent adds a highest priority station indication to a reserved burst in which the number of reserved slots is described, and transmits the reserved burst to prevent burst collision and improve satellite utilization rate. A reservation method has been proposed to achieve this.
【0004】[0004]
【発明が解決しようとする課題】これら従来の回線割当
の技術において、特開平3−088434号公報の技術
では固定割当方式とランダムアクセス方式と予約割当方
式を複合したTDMA(時分割多元接続)方式であるた
めに、タイムスロットの割り当て待ちをしているパケッ
トデータの接続遅延が大きくなり、複合方式を用いて多
様なサービスを提供することができなくなり、比較的長
い時間(数分〜数時間)にわたりタイムスロットを専有
することはできないという問題がある。Among these conventional line allocation techniques, the technique disclosed in Japanese Patent Laid-Open No. 3-088444 is a TDMA (time division multiple access) system that combines a fixed allocation system, a random access system, and a reserved allocation system. Therefore, the connection delay of the packet data waiting for the time slot allocation becomes large, and it becomes impossible to provide various services using the composite method, and the relatively long time (several minutes to several hours) There is a problem that the time slot cannot be exclusively occupied.
【0005】これに対し、特開昭63−084211号
公報、特開昭63−067926号公報、特開昭57−
037938号公報の技術では、衛星回線の利用効率を
上げることは可能であるが、各地球局にはトラヒック量
に無関係に回線を割り当てる制御が行われているため
に、各地球局の送信待ち時間の平均化、ネットワーク全
体の平均待ち時間の短縮化を行うことができないという
問題がある。On the other hand, JP-A-63-084211, JP-A-63-067926 and JP-A-57-
With the technology of Japanese Patent No. 037938, it is possible to improve the utilization efficiency of the satellite line, but since the control is performed to allocate the line to each earth station regardless of the traffic volume, the transmission waiting time of each earth station There is a problem in that the average waiting time of the network and the average waiting time of the entire network cannot be shortened.
【0006】さらに、特開昭61−281727号公報
の技術では過去の呼量を基準として未来の呼量を予測し
ているために予測誤差が生じ、接続遅延の短縮化の不確
定性が生じるという問題がある。Further, in the technique disclosed in Japanese Patent Laid-Open No. 61-281727, a prediction error occurs because the future call volume is predicted with reference to the past call volume, resulting in uncertainty of shortening the connection delay. There is a problem.
【0007】本発明の目的は、比較的長い時間を伝送に
必要とするデータへの回線割当を行うことを可能とする
一方で、各地球局の送信待ち時間の短縮と平均化するこ
とを可能にした衛星回線割当方式を提供することにあ
る。An object of the present invention is to make it possible to allocate a line to data that requires a relatively long time for transmission, while shortening and averaging the transmission waiting time of each earth station. It is to provide the satellite channel allocation method.
【0008】[0008]
【課題を解決するための手段】本発明は、通信衛星の同
じ周波数帯域を複数の地球局で交互に利用し、制御局が
前記各地球局からの回線接続要求に基づいて時分割で回
線割当を行う衛星回線割当方式において、前記制御局は
各地球局から伝送するデータ量に基づいて回線割当順位
を設定することを特徴とする。この場合、制御局は伝送
するデータ量が少ない地球局を優先的に上位の順位に回
線割当てすることが好ましい。According to the present invention, the same frequency band of a communication satellite is alternately used by a plurality of earth stations, and a control station allocates lines in time division based on a line connection request from each earth station. In the satellite channel allocation system for performing the above, the control station sets the channel allocation order based on the amount of data transmitted from each earth station. In this case, it is preferable that the control station preferentially allocates the earth station, which transmits a small amount of data, to a higher rank.
【0009】また、本発明は、制御局は各地球局から伝
送するデータ量と、各地球局からの回線接続要求時刻と
に基づいて回線割当順位を設定する。この場合、制御局
は各地球局の回線接続要求時刻に基づいて各地球局の待
ち時間を計算し、所定の待ち時間の範囲内で伝送するデ
ータ量が少ない地球局を優先的に上位の順位に回線割当
てすることが好ましい。例えば、所定の時間ブロック内
において回線接続要求があった複数の地球局に対して前
記順位を設定する。Further, according to the present invention, the control station sets the line allocation order based on the amount of data transmitted from each earth station and the line connection request time from each earth station. In this case, the control station calculates the waiting time of each earth station based on the line connection request time of each earth station, and gives priority to the earth station with a small amount of data to be transmitted within the predetermined waiting time, in the higher ranking. It is preferable to allocate lines to For example, the order is set for a plurality of earth stations that have made a line connection request within a predetermined time block.
【0010】[0010]
【発明の実施の形態】次に、本発明の実施形態を図面を
参照して説明する。図1(a)は本発明が適用される衛
星通信システムの一例を示す概略構成図であり、回線の
割当要求を行う複数の地球局(被制御局)TA,TB,
TCが通信衛星CSを介して回線割当を行う制御局Sと
時分割多元接続回線で接続されている様子を示してい
る。各地球局TA,TB,TCはデータ送信の必要が生
じると、図1(b)に示すように、送信要求時刻、送信
データ長、送信要求局、送信先の情報を含む回線接続要
求パケットを制御局に対して送信する。Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 (a) is a schematic configuration diagram showing an example of a satellite communication system to which the present invention is applied. A plurality of earth stations (controlled stations) TA, TB
It shows a state in which the TC is connected to a control station S that performs line allocation via a communication satellite CS by a time division multiple access line. When it becomes necessary for each earth station TA, TB, TC to transmit data, as shown in FIG. 1 (b), a line connection request packet including transmission request time, transmission data length, transmission request station, and destination information is transmitted. Send to control station.
【0011】制御局Cは、この回線接続要求パケットを
受信すると、送信要求時刻、送信データ長の情報に基づ
いて送信順位を決定し、回線割当を実行する。この回線
割当は、図2にフローチャートを示すように、先ず、送
信データ長の情報に基づき、回線接続要求のあった複数
の地球局TA,TB,TCの伝送データ量を比較する。
この伝送データ量の比較により、例えば、伝送データ量
が少ない地球局の優先順位を、伝送データ量が多い地球
局よりも高くする。この結果、伝送データ量が少ない地
球局から回線を割り当てる。When the control station C receives the line connection request packet, the control station C determines the transmission order based on the information of the transmission request time and the transmission data length, and executes the line allocation. In this line allocation, as shown in the flowchart of FIG. 2, first, based on the transmission data length information, the transmission data amounts of a plurality of earth stations TA, TB, and TC that have made line connection requests are compared.
By comparing the transmission data amounts, for example, the priority of the earth station with the smaller transmission data amount is set higher than that of the earth station with the large transmission data amount. As a result, the line is allocated from the earth station, which transmits less data.
【0012】次いで、送信要求時刻の情報に基づき、回
線接続要求のあった各地球局の待ち時間を計算する。こ
の待ち時間の計算は、前記した伝送データ長に基づいて
回線割当を実行したときの各地球局の待ち時間を計算
し、この待ち時間の総計がより短く、かつ平均待ち時間
がより短くなるように回線割当を実行する。さらに、こ
の場合、待ち時間の標準偏差を計算し、この標準偏差が
より小さくなるように回線割当を実行する。その上で、
回線接続要求パケットに含まれる送信要求局と送信先と
の情報に基づいて、制御局Cは該当する地球局に送信順
位が回ってきた時には回線を割り当てる。Next, the waiting time of each earth station that has made a line connection request is calculated based on the information of the transmission request time. This waiting time is calculated by calculating the waiting time of each earth station when the line allocation is executed based on the above-mentioned transmission data length so that the total waiting time is shorter and the average waiting time is shorter. Assign the line to. Further, in this case, the standard deviation of the waiting time is calculated, and the line allocation is executed so that the standard deviation becomes smaller. Moreover,
Based on the information of the transmission requesting station and the transmission destination included in the line connection request packet, the control station C allocates a line to the corresponding earth station when the transmission order is reached.
【0013】ここで、例えば、図3には4つの地球局か
らそれぞれデータA(長さ3)、データB(長さ1)、
データC(長さ4)、データD(長さ2)の回線接続要
求が同時にあったものとする。この場合に、前記したよ
うに各地球局のデータA〜Dに対する回線割当の送信順
位を変化させた場合の全ての組み合わせについての、総
待ち時間、平均待ち時間、および待ち時間の標準偏差を
示している。また、図5は図4の結果を平均待ち時間を
横軸とし、待ち時間の標準偏差を縦軸としてグラフで示
したものである。Here, for example, in FIG. 3, data A (length 3), data B (length 1), and
It is assumed that a line connection request for data C (length 4) and data D (length 2) is made at the same time. In this case, the total waiting time, the average waiting time, and the standard deviation of the waiting time are shown for all the combinations when the transmission order of the line allocation for the data A to D of each earth station is changed as described above. ing. Further, FIG. 5 is a graph showing the results of FIG. 4 with the average waiting time as the horizontal axis and the standard deviation of the waiting time as the vertical axis.
【0014】この結果、平均待ち時間が短く、かつ待ち
時間の標準偏差が小さい組み合わせとして、同グラフに
おいて矢印で示した丸の組み合わせ、すなわち図4の送
信順位番号「11」、データA〜Dを「BDAC」の順
位で送信する組み合わせが全ての組み合わせのなかで最
も適切であることが推定される。これから判るように、
データ長が短い順に回線接続を行うことで、平均待ち時
間とその標準偏差を小さくした回線接続が実現できる。
実際には、制御局は図2に示した手順により回線接続要
求があった複数の地球局の伝送データ長の比較を行い、
これに基づいて図4に示すような回線接続要求のマッピ
ングを行い、送信順位を決定することができる。例え
ば、マッピングを幾つかの象元に分けて、予めの象元に
順位を決めておき、送信順位の組み合わせを選択する方
法等が考えられる。As a result, as a combination having a short average waiting time and a small waiting time standard deviation, a combination of circles indicated by arrows in the graph, that is, the transmission order number "11" and the data A to D in FIG. It is estimated that the combination transmitted in the order of "BDAC" is the most suitable of all the combinations. As you can see,
By connecting the lines in ascending order of data length, it is possible to realize a line connection with a smaller average waiting time and its standard deviation.
Actually, the control station compares the transmission data lengths of a plurality of earth stations that have requested line connection according to the procedure shown in FIG.
Based on this, the line connection request is mapped as shown in FIG. 4 and the transmission order can be determined. For example, a method in which the mapping is divided into several elements, the ranking is determined in advance and the combination of transmission orders is selected, and the like can be considered.
【0015】なお、制御局では各地球局の送信要求時刻
から各地球局での送信待ち時間を算出するが、この待ち
時間は時々刻々変化されるので、回線割当制御に基づく
送信順位も刻々と変化している。このため、単に伝送デ
ータ長の比較のみで回線接続を行うと、送信要求時刻が
前後した場合には、必ずしも平均待ち時間や標準偏差を
小さくできない場合も生じる。また、時間の経過に伴っ
て連続的に伝送データの比較を行うと、伝送データが長
い地球局の回線接続は順次後回しにされ、その待ち時間
が大幅に増大され、平均待ち時間や標準偏差が増加され
るおそれもある。したがって、これに対しては、例え
ば、ある長さの時間ブロックを設定し、この時間ブロッ
ク内でのみ前記した伝送データ長の比較を行って回線接
続を行うようにすることが必要である。The control station calculates the transmission waiting time at each earth station from the transmission request time of each earth station, but since this waiting time changes from moment to moment, the transmission order based on the line allocation control is also momentary. Is changing. For this reason, if the line connection is made only by comparing the transmission data lengths, the average waiting time and the standard deviation may not always be reduced when the transmission request times are mixed. In addition, when transmission data is continuously compared with the passage of time, the line connection of the earth station with long transmission data is postponed in sequence, the waiting time is greatly increased, and the average waiting time and standard deviation are increased. It may increase. Therefore, for this purpose, for example, it is necessary to set a time block of a certain length and perform the above-mentioned comparison of the transmission data length only within this time block to establish a line connection.
【0016】[0016]
【実施例】図5に示すように、伝送データ長の長さがそ
れぞれ5(データA)、4(データB)、3(データ
C)、2(データD)、1(データE)のデータがあ
り、一つの衛星回線を共有してこのデータを伝送する場
合において、伝送順位を仮にデータ長が長い順、すなわ
ちA,B,C,D,Eの順に行うことを想定する。デー
タが送信順位待ちに要する時間をデータの長さで表現す
ると、それぞれの待ち時間は、0(データA)、5(デ
ータB)、9(データC)、12(データD)、14
(データE)となり、その合計を総待ち時間とすると4
0となり、その平均待ち時間は8となる。この例では平
均待ち時間が最悪値の50%、待ち時間の標準偏差が同
じく最悪値の65%となる。EXAMPLE As shown in FIG. 5, data having transmission data lengths of 5 (data A), 4 (data B), 3 (data C), 2 (data D), and 1 (data E), respectively. Therefore, in the case of transmitting this data by sharing one satellite line, it is assumed that the order of transmission is such that the data length is long, that is, A, B, C, D, E. When the time required for the data to wait for the transmission order is expressed by the length of the data, the respective waiting times are 0 (data A), 5 (data B), 9 (data C), 12 (data D), 14
(Data E), and the total waiting time is 4
It becomes 0, and the average waiting time becomes 8. In this example, the average waiting time is 50% of the worst value and the standard deviation of the waiting time is 65% of the worst value.
【0017】また、図6のように、同じ伝送データの組
み合わせで伝送データの長さと送信順位が無関係な場合
について示す。この例では、データC,D,B,A,E
の順位としており、それぞれの待ち時間は、0(データ
C)、3(データD)、5(データB)、9(データ
A)、14(データE)となり、その合計の総待ち時間
は31、平均待ち時間は6.2となる。Further, as shown in FIG. 6, the case where the length of transmission data and the transmission order are irrelevant in the same combination of transmission data is shown. In this example, the data C, D, B, A, E
The respective waiting times are 0 (data C), 3 (data D), 5 (data B), 9 (data A), and 14 (data E), and the total waiting time is 31. , The average waiting time is 6.2.
【0018】一方、前記した実施形態のように、伝送デ
ータの長さが短い順に送信を行う場合を図7に示す。こ
の場合には、データE,D,C,B,Aの順位となり、
それぞれの待ち時間は、0(データE)、1(データ
D)、3(データC)、6(データB)、10(データ
A)となり、その合計の総待ち時間は20、平均待ち時
間は4となる。On the other hand, FIG. 7 shows a case where the transmission data is transmitted in the ascending order as in the above-described embodiment. In this case, the order of data E, D, C, B, A is
The respective waiting times are 0 (data E), 1 (data D), 3 (data C), 6 (data B), 10 (data A), and the total waiting time is 20 and the average waiting time is It becomes 4.
【0019】図5,図6,図7から、このような場合に
は伝送データを短い順に並べて順次送信することで、総
待ち時間を最も短くできることは明らかである。From FIGS. 5, 6 and 7, it is clear that in such a case, the total waiting time can be minimized by arranging the transmission data in order from the shortest and transmitting the data sequentially.
【0020】図8(a)には図8の順位で伝送を行った
場合に、データBを伝送中に新たにデータF(データ長
2)、G(データ長3)の送信要求が発生した場合を示
している。この場合、未伝送データE,F,Gの総待ち
時間を最短化するためには、前記したようにこれら伝送
データのデータ長を比較し、図8(b)のように、デー
タ長の短い順に送信順位をF,G,Eと並べ替える必要
がある。しかしながら、この回線割当を時間的に継続さ
れた状態で行うと、長いデータはいつまでも伝送するこ
とができなくなるおそれがある。In FIG. 8A, when transmission is performed in the order shown in FIG. 8, new transmission requests for data F (data length 2) and G (data length 3) are generated during transmission of data B. The case is shown. In this case, in order to minimize the total waiting time of the untransmitted data E, F, G, the data lengths of these transmitted data are compared as described above, and as shown in FIG. It is necessary to rearrange the transmission order as F, G, E. However, if this line allocation is performed in a time-continuous manner, there is a risk that long data cannot be transmitted forever.
【0021】このような場合、図8(a),(b)にそ
れぞれ示したように、データをEFGの順で伝送する場
合と、FGEの順で伝送する場合の総待ち時間、平均待
ち時間、待ち時間の標準偏差を示すように、伝送データ
の短い順位のFGE順では総待ち時間は短くなるが標準
偏差が大きくなり、伝送データ間の不公平が生じること
がある。この場合、時間ブロックを設定し、データA〜
Eまでを1つの時間ブロックとし、データF,Gは次の
時間ブロックとすることで、データEの伝送を可能と
し、かつその標準偏差を低減することができる。そし
て、このデータEの伝送後は、次の時間ブロックにおい
て、前記と同様な伝送データの短い順に回線接続を実行
することになる。In such a case, as shown in FIGS. 8A and 8B, the total waiting time and the average waiting time in the case of transmitting data in the order of EFG and in the case of transmitting the data in the order of FGE, respectively. As shown by the standard deviation of the waiting time, the total waiting time becomes short in the FGE order of the shortest order of the transmission data, but the standard deviation becomes large, which may cause an unfairness among the transmission data. In this case, a time block is set and data A to
By setting up to E as one time block and the data F and G as the next time block, the data E can be transmitted and its standard deviation can be reduced. Then, after the transmission of the data E, in the next time block, the line connection is executed in the same order as the above-mentioned shorter transmission data.
【0022】[0022]
【発明の効果】以上述べたように、本発明は、回線接続
要求があった複数の地球局に対し、制御局は各地球局の
伝送データ量に基づいてその順位を設定して回線割当制
御を行ない、特に伝送データ量が少ない地球局を上位の
順位に設定することにより、複数の地球局における回線
接続の総待ち時間の短縮、待ち時間の平均化を行うこと
ができる。また、各地球局の待ち時間に応じて回線割当
順位の設定を行うことで、伝送データ量が大きい地球局
に対してもある程度の順位での回線割当が可能とし、回
線接続の待ち時間の標準偏差がいたずらに増大すること
を防止することができる。As described above, according to the present invention, the control station sets the order of a plurality of earth stations for which a line connection request has been made based on the transmission data amount of each earth station, and performs the line allocation control. By setting the earth station with a particularly small amount of transmission data to the higher rank, it is possible to reduce the total waiting time for line connection in a plurality of earth stations and to average the waiting times. In addition, by setting the line allocation order according to the waiting time of each earth station, it is possible to allocate lines to earth stations with a large amount of transmission data in a certain order, and the line connection waiting time standard It is possible to prevent the deviation from unnecessarily increasing.
【図1】本発明が適用される衛星通信システムの概略構
成図とその回線接続要求パケットのフレーム構成図であ
る。FIG. 1 is a schematic configuration diagram of a satellite communication system to which the present invention is applied and a frame configuration diagram of a line connection request packet thereof.
【図2】本発明の動作原理を示すフローチャートであ
る。FIG. 2 is a flowchart showing the operating principle of the present invention.
【図3】回線割当の組み合わせとその待ち時間の関係を
示す図である。FIG. 3 is a diagram showing a relationship between a combination of line allocation and its waiting time.
【図4】図3の組み合わせにおける待ち時間と標準偏差
の関係を示す図である。FIG. 4 is a diagram showing a relationship between a waiting time and a standard deviation in the combination of FIG.
【図5】本発明の第1の実施例における回線割当とその
待ち時間の関係を示す図である。FIG. 5 is a diagram showing the relationship between line allocation and its waiting time in the first embodiment of the present invention.
【図6】本発明の第2の実施例における回線割当とその
待ち時間の関係を示す図である。FIG. 6 is a diagram showing the relationship between line allocation and its waiting time in the second embodiment of the present invention.
【図7】本発明の第3の実施例における回線割当とその
待ち時間の関係を示す図である。FIG. 7 is a diagram showing a relationship between line allocation and its waiting time in the third embodiment of the present invention.
【図8】本発明の第4の実施例における回線割当の組み
合わせとその待ち時間の関係を示す図である。FIG. 8 is a diagram showing a relationship between a combination of line assignments and its waiting time in the fourth embodiment of the present invention.
CS 通信衛星 C 制御局 TA,TB,TC 地球局 CS communication satellite C control station TA, TB, TC earth station
Claims (5)
局で交互に利用し、制御局が前記各地球局からの回線接
続要求に基づいて時分割で回線割当を行う衛星回線割当
方式において、前記制御局は各地球局から伝送するデー
タ量に基づいて回線割当順位を設定することを特徴とす
る衛星回線割当方式。1. A satellite channel allocation system in which the same frequency band of a communication satellite is alternately used by a plurality of earth stations, and a control station allocates circuits in time division based on a circuit connection request from each of the earth stations, The satellite channel allocation system, wherein the control station sets the channel allocation order based on the amount of data transmitted from each earth station.
局を優先的に上位の順位に回線割当てする請求項1の衛
星回線割当方式。2. The satellite channel allocation system according to claim 1, wherein the control station preferentially allocates the channel of the earth station, which transmits a small amount of data, to a higher rank.
局で交互に利用し、制御局が前記各地球局からの回線接
続要求に基づいて時分割で回線割当を行う衛星回線割当
方式において、前記制御局は各地球局から伝送するデー
タ量と、各地球局からの回線接続要求時刻とに基づいて
回線割当順位を設定することを特徴とする衛星回線割当
方式。3. A satellite channel allocation method in which the same frequency band of a communication satellite is alternately used by a plurality of earth stations, and a control station allocates circuits in time division based on a circuit connection request from each of the earth stations, The satellite channel allocation system, wherein the control station sets the channel allocation order based on the amount of data transmitted from each earth station and the time required for connection from each earth station.
に基づいて各地球局の待ち時間を計算し、この待ち時間
の所定の範囲内で伝送するデータ量が少ない地球局を優
先的に上位の順位に回線割当てする請求項3の衛星回線
割当方式。4. The control station calculates the waiting time of each earth station based on the line connection request time of each earth station, and gives priority to the earth station having a small amount of data to be transmitted within a predetermined range of this waiting time. The satellite circuit allocation system according to claim 3, wherein the circuit is allocated to a higher rank.
接続要求があった複数の地球局に対して回線割当順位を
設定する請求項4の衛星回線割当方式。5. The satellite channel allocation system according to claim 4, wherein the control station sets the channel allocation order for a plurality of earth stations that have requested circuit connection within a predetermined time block.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12008796A JP2850848B2 (en) | 1996-05-15 | 1996-05-15 | Satellite line allocation method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12008796A JP2850848B2 (en) | 1996-05-15 | 1996-05-15 | Satellite line allocation method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09307495A true JPH09307495A (en) | 1997-11-28 |
JP2850848B2 JP2850848B2 (en) | 1999-01-27 |
Family
ID=14777595
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Application Number | Title | Priority Date | Filing Date |
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JP12008796A Expired - Lifetime JP2850848B2 (en) | 1996-05-15 | 1996-05-15 | Satellite line allocation method |
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JP (1) | JP2850848B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7017179B1 (en) | 1998-10-29 | 2006-03-21 | International Business Machines Corporation | Data receiving apparatus and method |
-
1996
- 1996-05-15 JP JP12008796A patent/JP2850848B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7017179B1 (en) | 1998-10-29 | 2006-03-21 | International Business Machines Corporation | Data receiving apparatus and method |
Also Published As
Publication number | Publication date |
---|---|
JP2850848B2 (en) | 1999-01-27 |
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