JPH09102980A - Frequency hop pattern setting method for radio system - Google Patents
Frequency hop pattern setting method for radio systemInfo
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- JPH09102980A JPH09102980A JP7259734A JP25973495A JPH09102980A JP H09102980 A JPH09102980 A JP H09102980A JP 7259734 A JP7259734 A JP 7259734A JP 25973495 A JP25973495 A JP 25973495A JP H09102980 A JPH09102980 A JP H09102980A
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- frequency
- frequency hopping
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- radio
- wireless
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、親局と子局が周波
数ホッピングスペクトル拡散方式で無線通信を行う無線
ゾーンを多数配置した無線システムの周波数ホッピング
パターン設定方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency hopping pattern setting method for a wireless system in which a large number of wireless zones are arranged in which a master station and a slave station perform wireless communication by a frequency hopping spread spectrum method.
【０００２】[0002]
【従来の技術】従来、周波数ホッピングスペクトル拡散
方式で無線通信を行うときの周波数ホッピングパターン
としては、特開平７−１６２３９３号公報に見られるよ
うな、周波数ホッピングパターンが使用されている。例
えば、ホッピングパターンＨＰ１〜７を、 ＨＰ１＝1,3,9,27,19,26,16,17,20,29,25,13,8,24,10,3
0,28,22,4,12,5,15,14,11,2,6,18,23,7,21 ＨＰ２＝19,26,16,17,20,29,25,13,8,24,10,30,28,22,
4,12,5,15,14,11,2,6,18,23,7,21,1,3,9,27 ＨＰ３＝20,29,25,13,8,24,10,30,28,22,4,12,5,15,14,
11,2,6,18,23,7,21,1,3,9,27,19,26,16,17 ＨＰ４＝8,24,10,30,28,22,4,12,5,15,14,11,2,6,18,2
3,7,21,1,3,9,27,19,26,16,17,20,29,25,13 ＨＰ５＝28,22,4,12,5,15,14,11,2,6,18,23,7,21,1,3,
9,27,19,26,16,17,20,29,25,13,8,24,10,30 ＨＰ６＝5,15,14,11,2,6,18,23,7,21,1,3,9,27,19,26,1
6,17,20,29,25,13,8,24,10,30,28,22,4,12 ＨＰ７＝2,6,18,23,7,21,1,3,9,27,19,26,16,17,20,29,
25,13,8,24,10,30,28,22,4,12,5,15,14,11 のように設定していた。このように従来は、１つの周波
数ホッピングパターンの位相をずらして使用することに
より、同時に複数の通信を可能にしている。2. Description of the Related Art Conventionally, a frequency hopping pattern as disclosed in Japanese Patent Laid-Open No. Hei 7-162393 has been used as a frequency hopping pattern when performing radio communication by a frequency hopping spread spectrum system. For example, the hopping patterns HP1 to HP7 are set to HP1 = 1,3,9,27,19,26,16,17,20,29,25,13,8,24,10,3.
0,28,22,4,12,5,15,14,11,2,6,18,23,7,21 HP2 = 19,26,16,17,20,29,25,13,8,24 , 10,30,28,22,
4,12,5,15,14,11,2,6,18,23,7,21,1,3,9,27 HP3 = 20,29,25,13,8,24,10,30,28 , 22,4,12,5,15,14,
11,2,6,18,23,7,21,1,3,9,27,19,26,16,17 HP4 = 8,24,10,30,28,22,4,12,5,15 , 14,11,2,6,18,2
3,7,21,1,3,9,27,19,26,16,17,20,29,25,13 HP5 = 28,22,4,12,5,15,14,11,2,6 , 18,23,7,21,1,3,
9,27,19,26,16,17,20,29,25,13,8,24,10,30 HP6 = 5,15,14,11,2,6,18,23,7,21,1 , 3,9,27,19,26,1
6,17,20,29,25,13,8,24,10,30,28,22,4,12 HP7 = 2,6,18,23,7,21,1,3,9,27,19 , 26,16,17,20,29,
25,13,8,24,10,30,28,22,4,12,5,15,14,11. As described above, conventionally, a plurality of communications can be simultaneously performed by using one frequency hopping pattern with the phase shifted.
【０００３】[0003]
【発明が解決しようとする課題】このような周波数ホッ
ピングパターンの設定では、それぞれの周波数ホッピン
グパターンが同時に変化することが条件となる。しか
し、複数の無線ゾーンを配置し、各無線ゾーン内でそれ
ぞれ独立して周波数ホッピングスペクトル拡散方式で無
線通信を行う場合は、各無線ゾーン間の周波数ホッピン
グパターンを同時に切替えることは極めて困難であり、
各無線ゾーン間の周波数ホッピングパターンの切替えタ
イミングにずれが生じる。In the setting of such frequency hopping patterns, it is a condition that the respective frequency hopping patterns change simultaneously. However, when arranging a plurality of wireless zones and performing wireless communication by the frequency hopping spread spectrum method independently in each wireless zone, it is extremely difficult to simultaneously switch the frequency hopping pattern between the wireless zones,
A shift occurs in the switching timing of the frequency hopping pattern between the wireless zones.
【０００４】このため、隣接した無線ゾーン間におい
て、同じ時間に同じ周波数で周波数ホッピングを行い、
長い期間互いに同じ周波数を使用する可能性があり、こ
のような場合は各無線ゾーン内での無線通信において、
送信待ち時間が長くなったり、通信データの衝突が発生
するなど通信状態が悪化する問題があった。そこで、本
発明は、互いに同じ周波数を使用すると干渉しあう無線
ゾーン間において、ある時間に同じ周波数を使用するこ
とがあっても周波数ホッピングにより必ず互いに異なる
周波数になるので、無線ゾーン内の無線通信を直ちに良
好な状態にでき、システム全体として良好な通信を確保
でき、しかも周波数の利用効率を向上できる無線システ
ムの周波数ホッピングパターン設定方法を提供する。Therefore, frequency hopping is performed at the same frequency at the same time between adjacent radio zones,
It is possible to use the same frequency for a long period of time, and in such a case, in wireless communication within each wireless zone,
There is a problem that the communication state deteriorates, such as a long transmission waiting time and collision of communication data. Therefore, according to the present invention, even if the same frequency is used at a certain time between wireless zones that interfere with each other when the same frequency is used, the frequencies are always different due to frequency hopping, so that wireless communication within the wireless zone is performed. There is provided a method of setting a frequency hopping pattern for a wireless system, which can immediately make a good condition, ensure good communication as a whole system, and improve the frequency utilization efficiency.
【０００５】[0005]
【課題を解決するための手段】請求項１記載の発明は、
親局と子局が周波数ホッピングスペクトル拡散方式で無
線通信を行う無線ゾーンを多数配置した無線システムに
おいて、全て異なる周波数ホッピング距離に周波数ホッ
ピングする基本の周波数ホッピングパターンから、複数
の周波数ホッピングパターンを生成し、この複数の周波
数ホッピングパターンの使用周波数帯域をずらしたもの
と、この複数の周波数ホッピングパターンの使用周波数
帯域が一部重なるように周波数帯域を広げたものから、
同じ周波数を使用したとき周波数ホッピングすると必ず
違う周波数になる周波数ホッピングパターンを選択し、
この周波数ホッピングパターンを同じ周波数を使用する
と干渉しあう無線ゾーンに割当てることにある。According to the first aspect of the present invention,
In a wireless system in which a master station and a slave station perform wireless communication using a frequency hopping spread spectrum method, a plurality of frequency zones are generated from a basic frequency hopping pattern in which frequency hopping is performed at different frequency hopping distances. , From those in which the use frequency bands of the plurality of frequency hopping patterns are shifted and those in which the use frequency bands of the plurality of frequency hopping patterns are partially overlapped,
When using the same frequency, select a frequency hopping pattern that results in a different frequency when frequency hopping,
This frequency hopping pattern is assigned to radio zones that interfere with each other when the same frequency is used.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。図１は無線ゾーンの配置例を示す
図で、例えば、スーパマーケットなどの１階にゾーン１
〜６を配置し、２階にゾーン７〜１２を配置し、１階に
おいてゾーン１はゾーン２，３と隣接し、ゾーン３はゾ
ーン１，４，５と隣接し、ゾーン５はゾーン３，６と隣
接し、２階においてゾーン７はゾーン８，９と隣接し、
ゾーン９はゾーン７，１０，１１と隣接し、ゾーン１１
はゾーン９，１２と隣接している。前記各無線ゾーン１
〜１２は、それぞれ１台の親局と複数台の子局を配置
し、親局と各子局との間で周波数ホッピングスペクトル
拡散方式で無線通信を行うようになっている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of arrangement of wireless zones. For example, zone 1 is located on the first floor of a supermarket or the like.
~ 6 are arranged, zones 7 to 12 are arranged on the second floor, zone 1 is adjacent to zones 2, 3 on the first floor, zone 3 is adjacent to zones 1, 4, 5 and zone 5 is zone 3, Zone 6 is adjacent to Zone 6, Zone 7 is adjacent to Zones 8 and 9,
Zone 9 is adjacent to Zones 7, 10, 11 and Zone 11
Are adjacent to zones 9 and 12. Each wireless zone 1
1 to 12 each have one master station and a plurality of slave stations, and perform radio communication between the master station and each slave station by the frequency hopping spread spectrum method.
【０００７】この各無線ゾーン１〜１２に対して、同じ
周波数を使用するとき、互いに干渉を与えるゾーンにお
いて、ある時間に特定の２つのゾーン間で同じ周波数を
使用したとき、周波数ホッピングすればこの特定の２つ
のゾーンは必ず異なる周波数になる周波数ホッピングパ
ターンを割当てている。例えば、無線ゾーン１と無線ゾ
ーン３は隣接するゾーンであり、同じ時間に同じ周波数
を使用すると互いに干渉しあう。図２に示すように、あ
る時間に無線ゾーン１と無線ゾーン３がＣＨ１７という
同じ周波数を使用すると互いに干渉しあう。しかし、周
波数ホッピングすることで無線ゾーン１はＣＨ２３に変
わり、無線ゾーン３はＣＨ１５に変わるので、互いに干
渉することはなくなる。When the same frequency is used for each of the radio zones 1 to 12, and when the same frequency is used between two specific zones at a certain time in a zone where they interfere with each other, if frequency hopping is performed, The two specific zones are assigned frequency hopping patterns that always have different frequencies. For example, the wireless zone 1 and the wireless zone 3 are adjacent zones, and when the same frequency is used at the same time, they interfere with each other. As shown in FIG. 2, if the wireless zone 1 and the wireless zone 3 use the same frequency of CH17 at a certain time, they interfere with each other. However, since the radio zone 1 is changed to CH23 and the radio zone 3 is changed to CH15 by frequency hopping, they do not interfere with each other.
【０００８】また、図３に示すように、無線通信に使用
できる周波数帯域の中で、周波数帯域Ｂと周波数帯域Ｃ
に分け、それぞれ無線ゾーンに振り分ける。周波数帯域
Ｂと周波数帯域Ｃは一部共用する周波数があり、これに
より周波数の利用効率を向上させる。Further, as shown in FIG. 3, frequency bands B and C are included in the frequency bands usable for wireless communication.
And divide them into wireless zones. The frequency band B and the frequency band C have some frequencies in common, which improves the utilization efficiency of the frequencies.
【０００９】次に周波数ホッピングパターンの設定につ
いて述べる。Ｑを素数か素数のベキ乗、αを原始元、ｎ
を０，１，２，３，…，Ｑ−２の整数とすると、基本と
なる周波数ホッピングパターンＹ1 （行列）は、 ｙn ＝ｍｏｄ（αn 、Ｑ） Ｙ1 ＝｛ｙ0 、ｙ1 、ｙ2 、…、ｙQ-2 ｝ から発生させることができる。但し、ｍｏｄ（ｘ，ｙ）
は、ｘをｙで割算した剰である。これは、全て異なるホ
ッピング距離に周波数ホッピングするパターンである。Next, the setting of the frequency hopping pattern will be described. Q is a prime or a power of a prime, α is a primitive element, n
Is an integer of 0, 1, 2, 3, ..., Q-2, the basic frequency hopping pattern Y 1 (matrix) is y n = mod (α n , Q) Y 1 = {y 0 , y 1, y 2, ..., it can be generated from the y Q-2}. Where mod (x, y)
Is the remainder obtained by dividing x by y. This is a frequency hopping pattern for all different hopping distances.
【００１０】Ａi （行列）は、オフセット１で、周波数
をシフトさせる量を表わし、Ａi ＝｛ａi 、ａi 、
ａi 、…、ａi ｝、ａi ＝ｉとして、ｉを０、１、２、
…、Ｑ−１と変化させると、 Ｙi ＝ｍｏｄ｛（Ｙ1 ＋Ａi ）、Ｑ｝ の式から、Ｙ0 、Ｙ1 、Ｙ2 、…、ＹQ-1 のＱ個の周波
数パターンが生成される。この周波数ホッピングパター
ンが基本の周波数ホッピングパターンとなる。A i (matrix) represents the amount by which the frequency is shifted by offset 1, and A i = {a i , a i ,
a i , ..., a i }, a i = i, and i is 0, 1, 2,
, Q−1, from the formula of Y i = mod {(Y 1 + A i ), Q}, Q frequency patterns of Y 0 , Y 1 , Y 2 , ..., Y Q-1 are obtained. Is generated. This frequency hopping pattern becomes the basic frequency hopping pattern.
【００１１】Ｂ（行列）はオフセット２で、Ｂ＝｛ｂ、
ｂ、ｂ、…、ｂ｝、ｂを正の整数とし、ＹＵi （行列）
＝Ｙi ＋Ｂを用いて、ｉを０、１、２、…、Ｑ−１と変
化させることにより、図３の周波数帯域ＡのＱ個の周波
数ホッピングパターンをシフトさせ、周波数帯域Ｂにす
る。この帯域での周波数ホッピングパターンを１つの使
用するグループとする。B (matrix) has an offset of 2, and B = {b,
Let b, b, ..., B}, b be positive integers, and YU i (matrix)
= Y i + B is used to change i from 0, 1, 2, ..., Q−1, thereby shifting the Q frequency hopping patterns in the frequency band A of FIG. 3 into the frequency band B. The frequency hopping pattern in this band is one used group.
【００１２】また、ｃを正の整数（使用周波数間隔）、
Ｄ（行列）＝｛ｄ、ｄ、ｄ、…、ｄ｝はオフセット３
で、周波数をシフトさせる量を表わし、ｄを０以上の整
数とし、 ＹＶi ＝Ｙi ×ｃ−Ｄ を用いて、図３の周波数帯域Ｃで使用する。但し、ｙ
imaxをｙ0 からｙQ-2 の中の最大値とし、ｃ−ｄ≦ｂ≦
ｙimax×ｃ−ｄとする。この条件により、図３の周波数
帯域ＢとＣのように、周波数帯域を一部共用することが
できる。これにより、周波数の利用効率を向上できる。
そして、図３の周波数帯域Ｂの周波数ホッピングパター
ンと周波数帯域Ｃの周波数ホッピングパターンの中か
ら、同じ周波数を使用すると互いに干渉するゾーンで同
じ周波数を連続して使用しないように周波数ホッピング
パターンを割当てる。Further, c is a positive integer (use frequency interval),
D (matrix) = {d, d, d, ..., d} is offset 3
In represents the amount of shifting the frequency, the d is 0 or an integer, with the YV i = Y i × c- D, used in the frequency band C in FIG. 3. However, y
Let imax be the maximum value from y 0 to y Q-2 , and cd −b ≦ b ≦
Let y imax × c−d. Under this condition, a part of the frequency band can be shared like the frequency bands B and C in FIG. As a result, the frequency utilization efficiency can be improved.
Then, from the frequency hopping pattern of the frequency band B and the frequency hopping pattern of the frequency band C in FIG. 3, the frequency hopping pattern is assigned so that the same frequency is not continuously used in the zones where they interfere with each other if the same frequency is used.
【００１３】無線ゾーンに対する周波数ホッピングパタ
ーンを割当ての一例を述べると、図１に示すように、無
線ゾーン１に電子レンジＥＲがあり、無線ゾーン１と無
線ゾーン２に電子レンジＥＲからの妨害を受ける無線機
が存在し、その他の無線ゾーンは電子レンジＥＲからの
妨害を受けないものとする。図４は電子レンジＥＲの周
波数スペクトルのピーク値と周波数との関係を示すグラ
フの一例である。また、２．４７１ＧＨz 〜２．４９７
ＧＨz は中速無線ＬＡＮ用に使用できる周波数帯であ
る。An example of allocating the frequency hopping pattern to the radio zones will be described. As shown in FIG. 1, the radio zone 1 has a microwave oven ER, and the radio zones 1 and 2 receive interference from the microwave oven ER. A radio is present and the other radio zones are not disturbed by the microwave oven ER. FIG. 4 is an example of a graph showing the relationship between the peak value of the frequency spectrum of the microwave oven ER and the frequency. Also, 2.471 GHz to 2.497
GHz is a frequency band that can be used for medium speed wireless LAN.
【００１４】グラフから分かるように中速無線ＬＡＮ用
に使用できる周波数帯の上側の周波数で電子レンジＥＲ
から放出されるスペクトルの電力のピークが小さくなっ
ているので、周波数帯域Ｂを使用すれば妨害は小さくな
る。すなわち、電子レンジＥＲの影響を受ける無線ゾー
ン１と無線ゾーン２は周波数帯域Ｂを使用する。それ以
外の無線ゾーン３〜１２では周波数帯域Ｃを使用する。
これにより、無線システム内に電子レンジＥＲが存在し
ても通信状態はそれほど悪化しない。As can be seen from the graph, the microwave oven ER operates at a frequency above the frequency band that can be used for medium speed wireless LAN.
Since the peak of the power of the spectrum emitted from is small, the interference is small when the frequency band B is used. That is, the wireless zone 1 and the wireless zone 2 affected by the microwave oven ER use the frequency band B. In the other wireless zones 3 to 12, the frequency band C is used.
Thereby, even if the microwave oven ER is present in the wireless system, the communication state does not deteriorate so much.
【００１５】表１は、Ｑ＝１１、α＝７、ｂ＝１４、ｃ
＝２、ｄ＝１としたときの無線ゾーン１〜１２で使用す
る周波数ホッピングパターンを示している。この表１で
示す各無線ゾーンの周波数ホッピングパターンは各無線
ゾーン毎に非同期で切替わり動作する。Table 1 shows that Q = 11, α = 7, b = 14, c.
2 shows the frequency hopping pattern used in the wireless zones 1 to 12 when = 2 and d = 1. The frequency hopping pattern of each wireless zone shown in Table 1 is asynchronously switched and operated for each wireless zone.
【００１６】[0016]
【表１】 [Table 1]
【００１７】ＣＨ１の中心周波数を２．４７２ＧＨz 、
ＣＨ２５の中心周波数を２．４９６ＧＨz とし、ｆ1 、
ｆ2 、ｆ3 、…、ｆ10、ｆ1 、…の順番に周波数を切り
替える。すなわち、無線ゾーン１は、ＣＨ１７、ＣＨ２
３、ＣＨ２１、ＣＨ１８、ＣＨ１９、ＣＨ１５、ＣＨ２
０、ＣＨ２２、ＣＨ２５、ＣＨ２４の繰り返しで周波数
を切り替える。これにより、隣接するゾーン間、即ち、
無線ゾーン１、無線ゾーン２、無線ゾーン３間では、あ
る時間において同じ周波数を使用しても周波数ホッピン
グすれば必ず異なる周波数になる。従って、干渉が発生
しても無線ゾーン内の無線通信を直ちに良好な状態にで
き、システム全体として良好な通信を確保できる。The center frequency of CH1 is 2.472 GHz,
The center frequency of CH25 is set to 2.496 GHz, f1,
The frequencies are switched in the order of f2, f3, ..., F10, f1 ,. That is, the wireless zone 1 has CH17 and CH2.
3, CH21, CH18, CH19, CH15, CH2
The frequency is switched by repeating 0, CH22, CH25, and CH24. As a result, between the adjacent zones, that is,
Even if the same frequency is used at a certain time among the wireless zone 1, the wireless zone 2 and the wireless zone 3, if the frequency hopping is performed, the frequencies are always different. Therefore, even if interference occurs, the wireless communication in the wireless zone can be immediately put into a good state, and good communication can be secured as the entire system.
【００１８】また、ｃ＝２として使用周波数間隔を２Ｃ
Ｈおきにしたことで、無線ゾーン３から無線ゾーン１２
では隣接チャネルを使用しなくなるため、隣接チャネル
の使用によるゾーン間の干渉を無くすことができる。さ
らに、全ての隣接するゾーンで同じ周波数及び隣接チャ
ネルを連続して使用しない周波数ホッピングパターンと
なっているので、ゾーン間の干渉を低くすることがで
き、無線システムとして良好な通信特性を持つことがで
きる。Further, when c = 2, the used frequency interval is 2C.
By setting every H, wireless zone 3 to wireless zone 12
In this case, since the adjacent channel is not used, the interference between zones due to the use of the adjacent channel can be eliminated. Further, since the frequency hopping pattern does not continuously use the same frequency and adjacent channels in all adjacent zones, it is possible to reduce interference between zones and to have good communication characteristics as a wireless system. it can.
【００１９】[0019]
【発明の効果】以上、請求項１記載の発明によれば、互
いに同じ周波数を使用すると干渉しあう無線ゾーン間に
おいて、ある時間に同じ周波数を使用することがあって
も周波数ホッピングにより必ず互いに異なる周波数にな
るので、無線ゾーン内の無線通信を直ちに良好な状態に
でき、システム全体として良好な通信を確保でき、しか
も周波数の利用効率を向上できる。As described above, according to the first aspect of the present invention, even if the same frequency is used at a certain time between radio zones that interfere with each other when the same frequency is used, they are always different from each other due to frequency hopping. Since the frequency is used, the wireless communication in the wireless zone can be immediately put into a good state, good communication can be secured as the entire system, and the frequency utilization efficiency can be improved.
【図１】本発明の実施の形態における無線ゾーンの配置
例を示す図。FIG. 1 is a diagram showing an example of arrangement of wireless zones according to an embodiment of the present invention.
【図２】同実施の形態における隣接する無線ゾーンの周
波数ホッピング例を示す図。FIG. 2 is a diagram showing an example of frequency hopping between adjacent wireless zones according to the first embodiment.
【図３】同実施の形態における使用周波数帯域を示す
図。FIG. 3 is a diagram showing a frequency band used in the same embodiment.
【図４】同実施の形態における使用周波数帯域と電子レ
ンジの周波数スペクトルのピーク値及び周波数との関係
を示すグラフ。FIG. 4 is a graph showing the relationship between the frequency band used and the peak value and frequency of the frequency spectrum of the microwave oven in the embodiment.
ＥＲ…電子レンジ ER ... Microwave
Claims (1)
ル拡散方式で無線通信を行う無線ゾーンを多数配置した
無線システムにおいて、全て異なる周波数ホッピング距
離に周波数ホッピングする基本の周波数ホッピングパタ
ーンから、複数の周波数ホッピングパターンを生成し、
この複数の周波数ホッピングパターンの使用周波数帯域
をずらしたものと、この複数の周波数ホッピングパター
ンの使用周波数帯域が一部重なるように周波数帯域を広
げたものから、同じ周波数を使用したとき周波数ホッピ
ングすると必ず違う周波数になる周波数ホッピングパタ
ーンを選択し、この周波数ホッピングパターンを同じ周
波数を使用すると干渉しあう無線ゾーンに割当てること
を特徴とする無線システムの周波数ホッピングパターン
設定方法。1. In a radio system in which a master station and a slave station perform a radio communication by a frequency hopping spread spectrum method in a large number of radio zones, a plurality of frequencies are selected from a basic frequency hopping pattern for frequency hopping at different frequency hopping distances. Generate a hopping pattern,
It is necessary to perform frequency hopping when the same frequency is used from the one in which the frequency bands used for these multiple frequency hopping patterns are shifted and the one in which the frequency bands are widened so that the frequency bands used in these multiple frequency hopping patterns partially overlap. A frequency hopping pattern setting method for a wireless system, comprising selecting frequency hopping patterns having different frequencies and allocating the frequency hopping patterns to wireless zones that interfere with each other when the same frequency is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7259734A JP2984588B2 (en) | 1995-10-06 | 1995-10-06 | Frequency hopping pattern setting method for wireless system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7259734A JP2984588B2 (en) | 1995-10-06 | 1995-10-06 | Frequency hopping pattern setting method for wireless system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09102980A true JPH09102980A (en) | 1997-04-15 |
| JP2984588B2 JP2984588B2 (en) | 1999-11-29 |
Family
ID=17338212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7259734A Expired - Lifetime JP2984588B2 (en) | 1995-10-06 | 1995-10-06 | Frequency hopping pattern setting method for wireless system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2984588B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001358695A (en) * | 2000-04-18 | 2001-12-26 | Lucent Technol Inc | Pilot use of spread-spectrum multiple access system based upon orthogonal frequency-division multiplexing |
| US6704345B1 (en) | 1998-03-10 | 2004-03-09 | Matsushita Electric Industrial Co., Ltd. | Transmission/reception apparatus and transmission/reception method |
| WO2009044708A1 (en) * | 2007-10-01 | 2009-04-09 | Ntt Docomo, Inc. | Signal sequence generation method, control information generation device, and user device |
| US8000375B2 (en) | 2006-12-21 | 2011-08-16 | Toshiba Tec Kabushiki Kaisha | Interrogator |
| US8351405B2 (en) | 2006-07-14 | 2013-01-08 | Qualcomm Incorporated | Method and apparatus for signaling beacons in a communication system |
-
1995
- 1995-10-06 JP JP7259734A patent/JP2984588B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6704345B1 (en) | 1998-03-10 | 2004-03-09 | Matsushita Electric Industrial Co., Ltd. | Transmission/reception apparatus and transmission/reception method |
| JP2001358695A (en) * | 2000-04-18 | 2001-12-26 | Lucent Technol Inc | Pilot use of spread-spectrum multiple access system based upon orthogonal frequency-division multiplexing |
| US8351405B2 (en) | 2006-07-14 | 2013-01-08 | Qualcomm Incorporated | Method and apparatus for signaling beacons in a communication system |
| US8000375B2 (en) | 2006-12-21 | 2011-08-16 | Toshiba Tec Kabushiki Kaisha | Interrogator |
| WO2009044708A1 (en) * | 2007-10-01 | 2009-04-09 | Ntt Docomo, Inc. | Signal sequence generation method, control information generation device, and user device |
| US8223816B2 (en) | 2007-10-01 | 2012-07-17 | Ntt Docomo, Inc. | Signal sequence generating method, control information generating apparatus and user equipment terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2984588B2 (en) | 1999-11-29 |
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