JPH03231523A - Mobile communication control system - Google Patents
Mobile communication control systemInfo
- Publication number
- JPH03231523A JPH03231523A JP2617690A JP2617690A JPH03231523A JP H03231523 A JPH03231523 A JP H03231523A JP 2617690 A JP2617690 A JP 2617690A JP 2617690 A JP2617690 A JP 2617690A JP H03231523 A JPH03231523 A JP H03231523A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- base station
- transmission output
- wireless
- mobile station
- 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.)
- Pending
Links
- 238000010295 mobile communication Methods 0.000 title claims description 7
- 230000005540 biological transmission Effects 0.000 claims abstract description 67
- 238000004891 communication Methods 0.000 claims abstract description 12
- 230000001413 cellular effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はセル方式移動通信の発信制御チャネルにおける
制御方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control method for an origination control channel in cellular mobile communications.
（従来の技術）
従来の発信制御チャネルの構成を図面を用いて説明する
。(Prior Art) The configuration of a conventional transmission control channel will be explained with reference to the drawings.
セル方式移動通信の構成例を第６図に示す（「自動車電
話」電子通信情報学会）。サービス地域は複数の無線ゾ
ーンに分割され、各無線ゾーンに無線基地局を置き、シ
ステムに割り当てられた複数の無線チャネルを分割して
各無線ゾーンに配置し、無線チャネルの干渉を起こさな
い距離を置いた無線ゾーンに同一の無線チャネルを配置
し、限られた無線チャネルで多数の移動局の収容を可能
にしている。無線チャネルには通話用の通話チャネル、
発信及び着信時の制御チャネルがある。移動局は、通常
は着信制御チャネルの下り（基地局送信、移動局受信）
信号を受信し、自分の吐出を待ち受けている。着信制御
チャネルの下り信号には発信制御チャネル情報があり、
移動局が発呼及び位置登録制御時にアクセスすべき発信
制御チャネルのチャネル番号等が報知される。An example of the configuration of cellular mobile communication is shown in FIG. 6 ("Car Telephone", Institute of Electronics, Communication and Information Engineers). The service area is divided into multiple wireless zones, a wireless base station is placed in each wireless zone, the multiple wireless channels assigned to the system are divided and placed in each wireless zone, and the distances that do not cause interference between wireless channels are determined. The same radio channel is placed in each radio zone, making it possible to accommodate a large number of mobile stations with a limited number of radio channels. The wireless channel includes a call channel for calls,
There is a control channel for outgoing and incoming calls. The mobile station usually receives the incoming control channel (base station transmission, mobile station reception).
It receives a signal and waits for its own discharge. The downlink signal of the incoming control channel has outgoing control channel information.
The channel number of the calling control channel that the mobile station should access during calling and location registration control is broadcast.
発信制御チャネルでは空き線制御が行われ、信号フォー
マットを第２図に無線基地局発信制御チャネル送受信装
置構成を第３図にそれぞれ示す。Free line control is performed on the outgoing control channel, and the signal format is shown in FIG. 2, and the configuration of the wireless base station outgoing control channel transmitting/receiving device is shown in FIG.
基地局は移動局からの信号を受信していない時間は、「
空」信号を送信し移動局のアクセスが可能なことを示す
。発信しようとする移動局は、「空」信号を確認し発信
要求信号を送信する。基地局は発信要求信号を受信する
と「塞」信号を送信する。発信しようとする他の移動局
は「塞」信号を受信することにより、発信要求信号の送
信を待機するため、複数移動局からの発信要求信号が衝
突することが防止できる。移動局送信信号の「情報」部
分には、該移動局がアクセスしようとする基地局のコー
ドが含まれている。従来の自動車電話方式では、いわゆ
る複局同時／順次送信方式を用いており、移動機はもよ
りの基地局を知ることができるからである。従って基地
局は同一周波数の発信制御チャネルを用いる他の無線ゾ
ーンからの発信要求信号を受信した場合でも、該基地局
コードにより他ゾーン信号と判別すると接続制御を中止
する。When the base station is not receiving signals from the mobile station,
It transmits an "empty" signal to indicate that mobile station access is possible. A mobile station attempting to make a call confirms the "empty" signal and transmits a call request signal. When the base station receives the transmission request signal, it transmits a "block" signal. Other mobile stations attempting to make a call wait for the transmission of the call request signal by receiving the "block" signal, so it is possible to prevent call request signals from multiple mobile stations from colliding. The "information" portion of the mobile station transmission signal contains the code of the base station that the mobile station is trying to access. This is because the conventional car telephone system uses a so-called multi-station simultaneous/sequential transmission system, which allows the mobile device to know the base station. Therefore, even if the base station receives a transmission request signal from another wireless zone using the transmission control channel of the same frequency, if the base station determines that the signal is a signal from another zone based on the base station code, it will stop connection control.
一方、移動通信では移動局周辺の地形及び建造物の影響
、または電波伝搬の周波数特性等により、移動局の位置
がたとえ無線ゾーン内であったとしても発信制御チャネ
ルの基地局受信レベルが低下する場合がある。このため
、基地局では発信制御卸チャネルの受信レベルには閾値
を設けず、受信レベルは低くとも、前置信号が受信でき
れば「塞」信号を送信する。On the other hand, in mobile communications, the base station reception level of the transmission control channel decreases even if the mobile station is within the wireless zone due to the influence of the topography and buildings around the mobile station or the frequency characteristics of radio wave propagation. There are cases. For this reason, the base station does not set a threshold value for the reception level of the transmission control wholesale channel, and even if the reception level is low, if the prefix signal can be received, the base station transmits the "block" signal.
以上のように、従来の発信制御チャネルは構成されてい
たため、移動局数が増えシステムの容量増大のために無
線ゾーンを小さ（し、第４図に示すように地理的に近い
距離で同一の発信制御チャネルを用いる無線ゾーン数が
増えた場合、第５図に示すように同一の発信制御チャネ
ルを用いる周辺の無線ゾーンでの発信要求信号が、干渉
波としてレベルは低いながらも受信される場合が増大す
る。例えば各ゾーンの発信回数が等しく、発信信号受信
回数において自ゾーンの信号総数を１とした場合、干渉
ゾーンからの信号総数を４と仮定する。本仮定の場合、
従来の方法では総受信回数は５となる。ただし、自ゾー
ン内の通常の信号と該干渉波との平均の受信Ｄ／Ｕは大
きいため、自ゾーン内信号が干渉信号により信号誤りと
なることは少ない。As mentioned above, the conventional transmission control channel was structured so that as the number of mobile stations increases and the capacity of the system increases, the wireless zone becomes smaller (as shown in Figure 4, the same When the number of wireless zones that use a transmission control channel increases, transmission request signals from surrounding wireless zones that use the same transmission control channel are received as interference waves, although at a low level, as shown in Figure 5. For example, if the number of transmissions in each zone is equal and the total number of signals in the own zone is 1 in the number of transmission signals received, it is assumed that the total number of signals from the interference zone is 4. In this assumption,
In the conventional method, the total number of receptions is 5. However, since the average reception D/U between the normal signal within the own zone and the interference wave is large, the signal within the own zone is unlikely to become a signal error due to the interference signal.
（発明が解決しようとする課題）
しかし、基地局は信号の「情報」部分により他の無線ゾ
ーンからの干渉波と判定した場合は制御は中止するもの
の、たとえ他ゾーンの信号であっても、発信信号を受信
すると直ちに「塞」信号を送信してしまう。従って、必
要以上に「塞」信号を送信し発信制御チャネルの使用を
禁止するため、自ゾーンの移動局が使用可能な発信制御
チャネルの時間率が低下してしまう。本仮定の場合、自
ゾーンの信号は２０％で大部分の受信信号は干渉信号で
あり、自ゾーンの制御信号を大きく圧迫することがわか
る。このため、各基地局の発信制御チャネルの必要数は
数倍となり、無線設備及び無線周波数の利用効率を大き
く低下させてしまう欠点があった。(Problem to be Solved by the Invention) However, if the base station determines that the signal is an interference wave from another wireless zone based on the "information" part, it will stop controlling it, but even if the signal is from another zone, Immediately after receiving the outgoing signal, it sends a "block" signal. Therefore, since the "blocked" signal is transmitted more than necessary and the use of the outgoing control channel is prohibited, the time rate of the outgoing control channel that can be used by the mobile station in its own zone is reduced. In this assumption, it can be seen that the signal in the own zone is 20% and most of the received signals are interference signals, which greatly compress the control signal in the own zone. Therefore, the required number of transmission control channels for each base station increases several times, which has the drawback of greatly reducing the efficiency of using radio equipment and radio frequencies.
本発明の目的は、他の無線ゾーンからの干渉により「塞
」信号を送信してしまい、発信制御チャネルの利用効率
が低下してしまう点を解決した発信制御チャネルにおけ
る制御方式を提供することにある。An object of the present invention is to provide a control method for a transmission control channel that solves the problem that a "blockage" signal is transmitted due to interference from other wireless zones and the usage efficiency of the transmission control channel decreases. be.
（課題を解決するための手段）
本発明は各無線基地局に複数の発信制御チャネルを配置
し、該複数の発信制御チャネル毎に移動局がアクセスす
る場合の送信出力の最大値及び最小値を予め移動局に報
知しておき、移動局は発信時に先ず最小の送信出力で発
信制御チャネルによりアクセスを行い、無線基地局と制
御信号の交信が不成功であった場合、移動局は送信出力
の最大値まで順次段階的に送信出方を上げてアクセスを
行うことを最も主要な特徴とする。従来の技術とは移動
機がアクセスする際の送信出力に段階を設けたことが異
なる。(Means for Solving the Problems) The present invention arranges a plurality of transmission control channels in each radio base station, and calculates the maximum and minimum values of transmission power when a mobile station accesses each of the plurality of transmission control channels. The mobile station is notified in advance, and at the time of transmission, the mobile station first accesses the transmission control channel with the minimum transmission power, and if communication of control signals with the radio base station is unsuccessful, the mobile station uses the minimum transmission power. The main feature is that access is performed by increasing the transmission output step by step until the maximum value is reached. This method differs from the conventional technology in that a step is provided for the transmission output when a mobile device accesses it.
（作用）
本発明によると、移動機の発信信号の出力は当初は低（
しておき、基地局との交信に成功すれば小出力により制
御が行われる。交信が不成功のときは、交信に成功する
まで送信出力を段階的に増加する。通常は小出力の送信
で交信に成功するので、従来の技術の問題点が改善され
る。(Function) According to the present invention, the output of the transmission signal of the mobile device is initially low (
If communication with the base station is successful, control is performed using a small output. If communication is unsuccessful, the transmission power is increased step by step until communication is successful. Since communication is usually successful with low power transmission, the problems of the prior art are improved.
（実施例）
本発明の詳細な説明する。移動機は着信制御チャネルに
より移動機が在圏している無線ゾーンにおいて使用でき
る発信制御チャネルの周波数と送信出力の最大値、最小
値、送信出力の再送毎の変化量、再送回数が報知されて
いる。移動機は第１図に示すように送信電力制御部を持
ち、発信時に報知情報に基づき送信出力の最小値で信号
を送出する。この際、無線基地局と制御信号の交信が不
成功であった場合、移動局は送信出力の最大値まで順次
段階的に送信出力を上げてアクセスを行う。通常ランダ
ムアクセス時に信号衝突が起こらなければ送信出力が低
くても在圏する無線基地局に正常に信号が受信される。(Example) The present invention will be explained in detail. The mobile device is informed by the incoming control channel of the frequency of the outgoing control channel that can be used in the wireless zone where the mobile device is located, the maximum and minimum values of the transmission power, the amount of change in the transmission power for each retransmission, and the number of retransmissions. There is. The mobile device has a transmission power control section as shown in FIG. 1, and transmits a signal at the minimum value of transmission power based on broadcast information when making a call. At this time, if communication of control signals with the radio base station is unsuccessful, the mobile station increases the transmission power in stages up to the maximum value of the transmission power and performs access. Normally, if no signal collision occurs during random access, the signal will be normally received by the existing wireless base station even if the transmission output is low.
はとんどの場合出力レベルの最小値で信号授受がなされ
ると考えられ干渉ゾーンからの飛び越し伝搬による制卸
チャネルの圧迫を大幅に軽減できる。In most cases, it is considered that signals are exchanged at the minimum output level, and the pressure on the control channel due to interlaced propagation from the interference zone can be greatly reduced.
また、在圏無線基地局内でも複数の信号が衝突した場合
、信号同士のレベル差がある程度大きければ、最大レベ
ルをもつ信号が正確に受信される。これを信号衝突時の
生き残りと呼べば、移動機からの送信出力を段階的にす
ることにより、衝突信号間のレベル差の分散を太き（す
ることができる。これにより、信号衝突時の生き残り確
率が高くなり、伝送不完了率が改善される。Furthermore, when a plurality of signals collide within a local wireless base station, as long as the level difference between the signals is large to some extent, the signal with the highest level will be accurately received. If we refer to this as survival in the event of a signal collision, by making the transmission output from the mobile device step-by-step, it is possible to thicken the dispersion of the level difference between the colliding signals. The probability is increased and the transmission incomplete rate is improved.
（発明の効果）
以上説明したように、移動局がアクセスする場合の送信
出力の最大値・最小値を予め移動局に報知しておき、移
動局は発信時に先ず最小の送信出力で発信制御チャネル
によりアクセスを行うが、無線基地局と制御信号の交信
が不成功であった場合、移動局は送信出力の最大値まで
順次段階的に送信出力を上げてアクセスを行うことによ
り、飛び越し伝搬による制御チャネルの圧迫を軽減でき
るほか、移動機からの送信出力を段階的にすることによ
り、衝突信号間のレベル差の分散を太き（することがで
き、これにより、信号衝突時の生き残り確率が高（なり
、伝送不完了率が改善される利点がある。(Effects of the Invention) As explained above, the maximum and minimum values of the transmission power when the mobile station accesses are notified to the mobile station in advance, and the mobile station first transmits the transmission control channel using the minimum transmission power when making a call. However, if communication of control signals with the radio base station is unsuccessful, the mobile station increases the transmission output in stages up to the maximum transmission output and performs access, thereby achieving control using interlaced propagation. In addition to reducing channel pressure, by grading the transmission output from the mobile device, it is possible to thicken the variance of the level difference between colliding signals, which increases the probability of survival in the event of a signal collision. (This has the advantage of improving the transmission incomplete rate.
第１図は本発明による移動装置の構成例、第２図は発信
制御チャネルの信号フォーマット例、
第３図は従来の無線基地局発信制御チャネル送信装置構
成例、
第４図は無線ゾーンの周波数繰返し例、第５図は制御信
号受信レベルの分布を示す図、第６図はセル方式移動通
信の構成例である。
１・・・無線ゾーン、 ２・・・無線基地局、３
・・・移動局、 ４・・・送信部、・・・
受信部、
・・・自ゾーン、
・・・送信電力制御部。
６・・・制御部、
８・・・干渉ゾーン、FIG. 1 shows an example of the configuration of a mobile device according to the present invention, FIG. 2 shows an example of the signal format of the outgoing control channel, FIG. 3 shows an example of the configuration of a conventional wireless base station outgoing control channel transmitter, and FIG. 4 shows the frequency of the wireless zone. As an example of repetition, FIG. 5 is a diagram showing the distribution of control signal reception levels, and FIG. 6 is an example of the configuration of cellular mobile communication. 1... Wireless zone, 2... Wireless base station, 3
...Mobile station, 4...Transmission section,...
Receiving section, . . . own zone, . . transmission power control section. 6...Control unit, 8...Interference zone,
Claims (1)
ンに無線基地局を置き、システムに割り当てられた複数
の無線チャネルを分割して各無線ゾーンに配置し、無線
チャネルの干渉が一定値以下となる距離を置いた無線ゾ
ーンに同一の無線チャネルを配置するセル方式移動通信
方式において、 移動局が発信時にアクセスする発信制御チャネルを各無
線基地局に１つまたは複数チャネル配置し、 該複数の発信制御チャネル毎に移動局がアクセスする送
信出力の最大値及び最小値を予め移動局に報知しておき
、 移動局は発信時に先ず最小の送信出力で発信制御チャネ
ルによりアクセスを行い、 無線基地局と制御信号の交信が不成功であつた場合、移
動局は送信出力の最大値まで順次段階的に送信出力を上
げてアクセスを行うことを特徴とする移動通信制御方式
。[Claims] A service area is divided into a plurality of wireless zones, a wireless base station is placed in each wireless zone, a plurality of wireless channels assigned to the system are divided and placed in each wireless zone, and the wireless channels are divided into multiple wireless zones. In cellular mobile communication systems, where the same radio channel is placed in radio zones separated by a certain distance where interference is below a certain value, each radio base station has one or more transmission control channels that the mobile station accesses when making a call. The maximum and minimum values of the transmission power that the mobile station accesses for each of the plurality of transmission control channels are notified to the mobile station in advance, and the mobile station first accesses the transmission control channel using the minimum transmission power when making a transmission. A mobile communication control method characterized in that, if communication of control signals with a radio base station is unsuccessful, the mobile station gradually increases the transmission output up to the maximum value of the transmission output and accesses the mobile station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2617690A JPH03231523A (en) | 1990-02-07 | 1990-02-07 | Mobile communication control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2617690A JPH03231523A (en) | 1990-02-07 | 1990-02-07 | Mobile communication control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03231523A true JPH03231523A (en) | 1991-10-15 |
Family
ID=12186225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2617690A Pending JPH03231523A (en) | 1990-02-07 | 1990-02-07 | Mobile communication control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03231523A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04237224A (en) * | 1991-01-21 | 1992-08-25 | Matsushita Electric Ind Co Ltd | System cordless telephone system |
| JPH06216901A (en) * | 1993-01-13 | 1994-08-05 | Nec Corp | Satellite communication system |
| JPH07202896A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Satellite communication system |
| JPH08265252A (en) * | 1995-03-24 | 1996-10-11 | Seiko Instr Inc | Transmission power control method for small-sized radio equipment |
| WO2000014908A1 (en) * | 1998-09-08 | 2000-03-16 | Hitachi, Ltd. | Method for controlling power of communication system |
| US6163696A (en) * | 1996-12-31 | 2000-12-19 | Lucent Technologies Inc. | Mobile location estimation in a wireless communication system |
| WO2003021809A1 (en) * | 2001-09-03 | 2003-03-13 | Mitsubishi Denki Kabushiki Kaisha | Transmission power control method in wireless mobile device |
| JP2007005988A (en) * | 2005-06-22 | 2007-01-11 | Canon Inc | Communication equipment and communication method |
| JP2007181218A (en) * | 1994-11-04 | 2007-07-12 | Koninkl Philips Electronics Nv | Selective call system |
| US7426391B2 (en) | 1992-03-05 | 2008-09-16 | Qualcomm Incorporated | Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system |
| WO2008123148A1 (en) * | 2007-03-30 | 2008-10-16 | Ntt Docomo, Inc. | Mobile communication system, base station device, and user device and method |
| JP2010148121A (en) * | 1999-03-08 | 2010-07-01 | Qualcomm Inc | Method and apparatus for maximizing use of available capacity in communication system |
| JP2014090485A (en) * | 1996-06-27 | 2014-05-15 | Interdigital Technology Corp | System for controlling transmission power ramp-up in wireless cdma system by using short codes |
| US9564963B2 (en) | 1995-06-30 | 2017-02-07 | Interdigital Technology Corporation | Automatic power control system for a code division multiple access (CDMA) communications system |
-
1990
- 1990-02-07 JP JP2617690A patent/JPH03231523A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04237224A (en) * | 1991-01-21 | 1992-08-25 | Matsushita Electric Ind Co Ltd | System cordless telephone system |
| US7734260B2 (en) | 1992-03-05 | 2010-06-08 | Qualcomm Incorporated | Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system |
| US7426391B2 (en) | 1992-03-05 | 2008-09-16 | Qualcomm Incorporated | Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system |
| JPH06216901A (en) * | 1993-01-13 | 1994-08-05 | Nec Corp | Satellite communication system |
| JPH07202896A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | Satellite communication system |
| JP2007181218A (en) * | 1994-11-04 | 2007-07-12 | Koninkl Philips Electronics Nv | Selective call system |
| JP2011035933A (en) * | 1994-11-04 | 2011-02-17 | Koninkl Philips Electronics Nv | Selective call system |
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