JP3308865B2 - Interference avoidance channel detection method - Google Patents
Interference avoidance channel detection methodInfo
- Publication number
- JP3308865B2 JP3308865B2 JP20169097A JP20169097A JP3308865B2 JP 3308865 B2 JP3308865 B2 JP 3308865B2 JP 20169097 A JP20169097 A JP 20169097A JP 20169097 A JP20169097 A JP 20169097A JP 3308865 B2 JP3308865 B2 JP 3308865B2
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- interference
- base station
- band
- radio
- 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
Links
- 238000001514 detection method Methods 0.000 title description 7
- 238000005259 measurement Methods 0.000 claims description 9
- 238000010295 mobile communication Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、２つ以上の異なる
無線帯域を具備し、無線基地局と移動局とが各々の帯域
において無線チャネルを介して通信を行う移動通信シス
テムにおいて干渉を回避する干渉回避チャネル検出方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention avoids interference in a mobile communication system having two or more different radio bands, in which a radio base station and a mobile station communicate with each other via a radio channel in each band. The present invention relates to an interference avoidance channel detection method.
【０００２】[0002]
【従来の技術】図３は、２つの無線帯域を制御する移動
通信システムを示す図である。同図において、１０１は
無線基地局であり、該無線基地局は２つの無線帯域１０
２，１０３を有している。１０４，１０６は移動局であ
り、移動局１０４は無線帯域１０２，１０３の両帯域を
使用することができ、移動局１０６は無線帯域１０２の
みを使用することができる。１０５は無線基地局１０１
と移動局１０４が通信に使用している周波数を示し、１
０７は無線基地局１０１と移動局１０６が通信に使用し
ている周波数を示している。2. Description of the Related Art FIG. 3 is a diagram showing a mobile communication system for controlling two radio bands. In the figure, reference numeral 101 denotes a wireless base station, and the wireless base station has two wireless bands 10.
2,103. 104 and 106 are mobile stations. The mobile station 104 can use both of the radio bands 102 and 103, and the mobile station 106 can use only the radio band 102. 105 is the wireless base station 101
And the frequency used by the mobile station 104 for communication.
Reference numeral 07 denotes a frequency used by the radio base station 101 and the mobile station 106 for communication.
【０００３】２つの無線帯域を具備する移動通信システ
ムの回線割当方法として、無線基地局１０１は移動局１
０４と通信を行うために無線帯域１０３を優先して割り
当てるが、これは無線帯域１０３が移動局１０４でしか
使用できないためである。移動局１０４に無線帯域１０
２を先に割り当ててしまうと、移動局１０６が使用でき
る無線帯域が減少してしまうからである。なお、上記説
明では、２つの無線帯域を制御する方式について説明し
ているが、本技術は複数の無線帯域を制御しうるもので
ある。As a channel allocation method for a mobile communication system having two radio bands, the radio base station 101
The wireless band 103 is preferentially allocated to perform communication with the mobile station 104, because the wireless band 103 can be used only by the mobile station 104. Radio band 10 for mobile station 104
This is because, if 2 is assigned first, the radio band that can be used by the mobile station 106 decreases. In the above description, a method for controlling two wireless bands has been described, but the present technology can control a plurality of wireless bands.
【０００４】図４は、複数の帯域で使用可能な移動局の
通信中干渉回避シーケンスを示す図である。同図におい
て、２０１は移動局の動作を示し、２０２は無線基地局
の動作を示している。移動局２０１は通信中に干渉を受
けると、無線基地局２０２に対して、干渉劣化（２０
３）を報告する。無線基地局２０２は干渉劣化（２０
３）を受け取ると、同一帯域に空き回線があるか否かを
チェックする（２０４）。同一帯域に空き回線がある場
合には、同一帯域の別の周波数をチャネル切り替え（２
０５）によって行い、同一帯域に空き回線がない場合に
は、別の帯域に対してチャネル切り替え（２０６）を行
う。FIG. 4 is a diagram showing a mobile station interference avoidance sequence which can be used in a plurality of bands. In the figure, 201 indicates the operation of the mobile station, and 202 indicates the operation of the radio base station. When the mobile station 201 receives interference during communication, it causes the radio base station 202 to perform interference degradation (20
Report 3). The radio base station 202 performs interference degradation (20
When receiving 3), it is checked whether there is a free line in the same band (204). If there is a vacant line in the same band, another frequency in the same band is switched (2).
05), and if there is no vacant line in the same band, the channel is switched (206) to another band.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の処理に
おいて、同一帯域へのチャネル切り替えが全帯域の中で
最適なチャネルである保証はない。すなわち、移動局が
受けた干渉が通信中帯域の全体にわたった場合には、同
一帯域の別の周波数を選択してしまうと、干渉先の回線
を選択してしまう危険が高いという問題がある。In the above-described conventional processing, there is no guarantee that the channel switching to the same band is the optimum channel in all the bands. That is, when the interference received by the mobile station extends over the entire communication band, there is a problem that if another frequency in the same band is selected, there is a high risk of selecting a line of the interference destination. .
【０００６】本発明は、上記に鑑みてなされたもので、
その目的とするところは、通信中に干渉を受けた場合に
再度干渉先の回線を割り当てることがなく、最も条件の
良い空き無線チャネルを選択することができる干渉回避
チャネル検出方法を提供することにある。[0006] The present invention has been made in view of the above,
It is an object of the present invention to provide an interference avoidance channel detection method capable of selecting a free wireless channel having the best condition without reassigning a line of an interference destination when receiving interference during communication. is there.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、請求項１記載の本発明は、２つ以上の異なる無線帯
域を具備し、無線基地局と移動局とが各々の帯域におい
て無線チャネルを介して通信を行う移動通信システムに
おいて、移動局が通信中に無線基地局により指定された
帯域の空きチャネルの受信レベルを測定し、該測定結果
に基づき移動局が複数の干渉状態を検出した際に、無線
基地局は移動局が通信中の帯域とは異なる無線帯域を移
動局に選択させることを要旨とする。In order to achieve the above object, the present invention according to claim 1 comprises two or more different radio bands, and a radio base station and a mobile station use a radio channel in each band. In a mobile communication system that communicates via a mobile station, the mobile station measures the reception level of a vacant channel in the band specified by the radio base station during communication, and the mobile station detects a plurality of interference states based on the measurement result. In this case, the gist of the radio base station is to allow the mobile station to select a radio band different from the band with which the mobile station is communicating.
【０００８】請求項１記載の本発明にあっては、移動局
が通信中に無線基地局により指定された帯域の空きチャ
ネルの受信レベルを測定し、該測定結果に基づき移動局
が複数の干渉状態を検出すると、無線基地局は移動局が
通信中の帯域とは異なる無線帯域を移動局に選択させる
ため、最も条件の良い空きチャネルを選択することがで
きる。According to the first aspect of the present invention, the mobile station measures the reception level of a vacant channel in the band specified by the radio base station during communication, and based on the measurement result, the mobile station determines a plurality of interference levels. When the state is detected, the radio base station allows the mobile station to select a radio band different from the band with which the mobile station is communicating, so that it is possible to select an empty channel with the best conditions.
【０００９】[0009]
【発明の実施の形態】以下、図面を用いて本発明の実施
の形態について説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１は、本発明の一実施形態に係る干渉回
避チャネル検出方法に従って干渉回避のための移動局と
無線基地局の動作を示す図である。同図において、３０
１は移動局の動作、３０２は無線基地局の動作、３０３
は移動局３０１から無線基地局に対する接続要求、３０
４は移動局３０１に対して無線基地局３０２から指定さ
れた周波数の受信レベルを測定させる周辺レベル測定指
令信号、３０５は移動局３０１と無線基地局３０２が通
信している状態、３０６は干渉を検出したときの干渉報
告信号、３０７は移動局３０１に通信している周波数を
切り替えるための周波数指定信号を示している。FIG. 1 is a diagram illustrating operations of a mobile station and a radio base station for avoiding interference according to an interference avoidance channel detection method according to one embodiment of the present invention. In FIG.
1 is the operation of the mobile station, 302 is the operation of the radio base station, 303
Is a connection request from the mobile station 301 to the radio base station,
Reference numeral 4 denotes a peripheral level measurement command signal for causing the mobile station 301 to measure a reception level of a frequency designated by the radio base station 302, reference numeral 305 denotes a state in which the mobile station 301 and the radio base station 302 are communicating, and reference numeral 306 denotes interference. An interference report signal 307 at the time of detection indicates a frequency designation signal for switching the frequency communicating with the mobile station 301.
【００１１】図１において、移動局３０１が無線基地局
３０２に対して接続要求信号３０３を用いて通信設定を
行う。この時、無線基地局３０２は周辺レベル測定指令
信号３０４によって通信に使用する帯域の空き周波数の
受信レベルを測定させる。移動局３０１は周辺レベル測
定指令信号３０４によって指定された周波数を通信状態
中（３０５）常に監視する。そして、移動局は複数の干
渉波を検出すると、干渉報告信号３０６によって無線基
地局３０２に通知する。無線基地局３０２はこの干渉報
告信号３０６を受信すると、周波数指定信号３０７を移
動局に送信して、干渉を受けていない別の無線帯域に移
動局３０１を切り替えるように制御する。In FIG. 1, a mobile station 301 sets up communication with a radio base station 302 using a connection request signal 303. At this time, the wireless base station 302 causes the peripheral level measurement command signal 304 to measure the reception level of a vacant frequency in a band used for communication. The mobile station 301 constantly monitors the frequency designated by the peripheral level measurement command signal 304 during the communication state (305). When the mobile station detects a plurality of interference waves, it notifies the radio base station 302 of the interference report signal 306. Upon receiving the interference report signal 306, the radio base station 302 transmits a frequency designation signal 307 to the mobile station, and controls the mobile station 301 to switch to another radio band free from interference.
【００１２】図２は、移動局が周辺のレベル測定を行
い、干渉を検出したときの状態を示す図である。図２に
おいて、４０１は干渉検出前の周辺受信レベルの状態を
示し、４０２は無線基地局から指定された通信中帯域の
周辺周波数を示している。また、４０３は部分的に干渉
を検出した状態を示し、４０４は干渉のある周波数を示
し、４０５は干渉のない周波数を示している。更に、４
０６はすべての空きチャネルにおいて干渉を検出した状
態を示し、４０７は干渉を検出された周波数を示してい
る。FIG. 2 is a diagram showing a state in which the mobile station measures the surrounding level and detects interference. In FIG. 2, reference numeral 401 denotes a state of a peripheral reception level before interference detection, and reference numeral 402 denotes a peripheral frequency of a communication band specified by the radio base station. Reference numeral 403 denotes a state in which interference is partially detected, 404 denotes a frequency with interference, and 405 denotes a frequency without interference. Furthermore, 4
06 indicates a state in which interference is detected in all available channels, and 407 indicates a frequency at which interference is detected.
【００１３】移動局は通信中に無線基地局より通知され
た周波数４０２を常時監視し、これらの周波数が状態４
０３の周波数４０４で示すように部分的に干渉を受けた
場合には、周波数４０５を選択するように無線基地局に
通知し、また状態４０６で示すようにすべての周波数に
干渉を受けた場合には、別の周波数帯域に周波数を切り
替えるように無線基地局に通知する。The mobile station constantly monitors the frequencies 402 notified by the radio base station during communication, and these frequencies are set to state 4
In case of partial interference as shown by the frequency 404 of 03, the base station notifies the radio base station to select the frequency 405, and in case of interference by all the frequencies as shown by the state 406. Notifies the radio base station to switch the frequency to another frequency band.
【００１４】[0014]
【発明の効果】以上説明したように、本発明によれば、
移動局が通信中に無線基地局により指定された帯域の空
きチャネルの受信レベルを測定し、該測定結果に基づき
移動局が複数の干渉状態を検出すると、無線基地局は移
動局が通信中の帯域とは異なる無線帯域を移動局に選択
させるので、移動局において通信中に複数の周辺レベル
の測定結果により広帯域における干渉状態を把握するこ
とができるため、無線基地局で検出不能な干渉において
最も条件の良い空きチャネルを選択することができる。As described above, according to the present invention,
When the mobile station measures the reception level of a vacant channel in the band specified by the radio base station during communication, and when the mobile station detects a plurality of interference states based on the measurement result, the radio base station determines whether the mobile station is communicating with the mobile station. Since the mobile station selects a wireless band different from the band, the mobile station can grasp the interference state in the wide band based on the measurement results of a plurality of peripheral levels during communication, so that the interference that cannot be detected by the wireless base station is most important. An empty channel with good conditions can be selected.
【図１】本発明の一実施形態に係る干渉回避チャネル検
出方法に従って干渉回避のための移動局と無線基地局の
動作を示す図である。FIG. 1 is a diagram illustrating operations of a mobile station and a radio base station for avoiding interference according to an interference avoidance channel detection method according to an embodiment of the present invention.
【図２】移動局が周辺のレベル測定を行い、干渉を検出
したときの状態を示す図である。FIG. 2 is a diagram illustrating a state when a mobile station performs level measurement of the surroundings and detects interference.
【図３】２つの無線帯域を制御する移動通信システムを
示す図である。FIG. 3 is a diagram illustrating a mobile communication system that controls two wireless bands.
【図４】複数の帯域で使用可能な移動局の通信中干渉回
避シーケンスを示す図である。FIG. 4 is a diagram showing a communication interference avoidance sequence of a mobile station that can be used in a plurality of bands.
３０１ 移動局 ３０２ 無線基地局 301 mobile station 302 wireless base station
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 7/24 - 7/26 102 H04Q 7/00 - 7/38 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H04B 7/ 24-7/26 102 H04Q 7/ 00-7/38
Claims (1)
線基地局と移動局とが各々の帯域において無線チャネル
を介して通信を行う移動通信システムにおいて、移動局
が通信中に無線基地局により指定された帯域の空きチャ
ネルの受信レベルを測定し、該測定結果に基づき移動局
が複数の干渉状態を検出した際に、無線基地局は移動局
が通信中の帯域とは異なる無線帯域を移動局に選択させ
ることを特徴とする干渉回避チャネル検出方法。1. A mobile communication system having two or more different radio bands, wherein a radio base station and a mobile station communicate with each other via a radio channel in each band. When the mobile station detects a plurality of interference states based on the measurement result, the radio base station determines a radio band different from the band in which the mobile station is communicating. A method for detecting an interference avoidance channel, wherein the method is selected by a mobile station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20169097A JP3308865B2 (en) | 1997-07-28 | 1997-07-28 | Interference avoidance channel detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20169097A JP3308865B2 (en) | 1997-07-28 | 1997-07-28 | Interference avoidance channel detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1146382A JPH1146382A (en) | 1999-02-16 |
| JP3308865B2 true JP3308865B2 (en) | 2002-07-29 |
Family
ID=16445297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20169097A Expired - Lifetime JP3308865B2 (en) | 1997-07-28 | 1997-07-28 | Interference avoidance channel detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3308865B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5062609B2 (en) * | 2006-03-28 | 2012-10-31 | 京セラ株式会社 | Mobile station and base station |
| JP2007267077A (en) * | 2006-03-29 | 2007-10-11 | Kyocera Corp | Base station, radio communication method and radio communication system |
| JP5084427B2 (en) * | 2007-09-27 | 2012-11-28 | 京セラ株式会社 | Base station, radio communication method, and radio communication system |
| US8958833B2 (en) * | 2009-05-22 | 2015-02-17 | Qualcomm Incorporated | Systems, apparatus and methods for interference management on downlink channels in wireless communication systems |
| JP5375579B2 (en) * | 2009-12-16 | 2013-12-25 | 富士通株式会社 | Wireless base station and communication method |
| US9497714B2 (en) | 2010-09-24 | 2016-11-15 | Qualcomm Incorporated | Power control for a network of access points |
| US9301265B2 (en) * | 2010-09-24 | 2016-03-29 | Qualcomm Incorporated | Access point transmit power control |
| US9451480B2 (en) | 2010-09-28 | 2016-09-20 | Qualcomm Incorporated | Methods and apparatus for power management in a wireless communication system |
| JP2017200125A (en) * | 2016-04-28 | 2017-11-02 | ヤンマー株式会社 | Wireless communication system |
-
1997
- 1997-07-28 JP JP20169097A patent/JP3308865B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1146382A (en) | 1999-02-16 |
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