JP2972446B2 - Control channel switching method - Google Patents
Control channel switching methodInfo
- Publication number
- JP2972446B2 JP2972446B2 JP4204602A JP20460292A JP2972446B2 JP 2972446 B2 JP2972446 B2 JP 2972446B2 JP 4204602 A JP4204602 A JP 4204602A JP 20460292 A JP20460292 A JP 20460292A JP 2972446 B2 JP2972446 B2 JP 2972446B2
- Authority
- JP
- Japan
- Prior art keywords
- control channel
- downlink control
- signal amount
- channel signal
- standby
- 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 - Fee Related
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は移動体通信システムにお
ける制御チャネル切り替え方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control channel switching method in a mobile communication system.
【０００２】[0002]
【従来の技術】従来のセルラー方式移動体通信システム
では、制御チャネルは動作論理上デディケイテッド（Ｄ
ｅｄｉｃａｔｅｄ）制御チャネルとページング（Ｐａｇ
ｉｎｇ）制御チャネルとアクセス（Ａｃｃｅｓｓ）制御
チャネルの三つに分かれている。一つの制御チャネル装
置にこれら三つの論理的制御チャネル動作を同時に行わ
せる事も可能であり、複数の制御チャネル装置に三つの
論理的制御チャネル動作を分担させる事も可能である。
これらの制御チャネル論理的チャネル機能割付はシステ
ムを構築する時に決定され、その後システム動作状況変
化に応じて人為的に機能割付が変更される以外に、機能
割付変更がなされる事は無い。またシステムを構築する
時に最も多く取られる制御チャネル機能割付は、制御チ
ャネル装置数をより少なくする、１制御チャネル装置に
三つの論理的制御チャネル動作を行わせるという割付で
ある。2. Description of the Related Art In a conventional cellular mobile communication system, a control channel is logically dedicated (D).
dedicated control channel and paging (Pag)
ing) control channel and access control channel. It is also possible for one control channel device to simultaneously perform these three logical control channel operations, and it is also possible to cause a plurality of control channel devices to share the three logical control channel operations.
These control channel logical channel function assignments are determined at the time of constructing the system, and thereafter, the function assignments are not changed except that the function assignments are changed artificially according to changes in the system operation status. The most frequently assigned control channel function assignment when constructing a system is an assignment in which one control channel device performs three logical control channel operations to reduce the number of control channel devices.
【０００３】一方、制御チャネル動作の信頼性向上のた
め、装置構成として常用系である常用制御チャネル装置
と予備系である予備制御チャネル装置による待機予備冗
長構成が制御チャネルには取られる。常用装置に故障が
生じた場合には、待機させていた予備装置に常用装置の
代替を行わせる、制御チャネル切り替えが行われる。On the other hand, in order to improve the reliability of the operation of the control channel, a standby / redundant redundant configuration of a normal control channel device as a normal system and a standby control channel device as a standby system is adopted for the control channel. When a failure occurs in the service device, control channel switching is performed to cause the standby device, which has been on standby, to replace the service device.
【０００４】[0004]
【発明が解決しようとする課題】従来のセルラー方式移
動体通信システムにおいて、移動体端末から無線基地局
へ送信される上り制御チャネル信号量と、無線基地局か
ら移動体端末に送信される下り制御チャネル信号量とを
比較した場合、チャネル動作の特性に依存し下り制御チ
ャネル信号量の方が多い。In a conventional cellular mobile communication system, the amount of uplink control channel signal transmitted from a mobile terminal to a radio base station and the downlink control signal transmitted from a radio base station to a mobile terminal are described. When compared with the channel signal amount, the downlink control channel signal amount is larger depending on the characteristics of the channel operation.
【０００５】一方、無線基地局から移動体端末への下り
制御チャネル信号伝送は、仕様書で規定された信号伝送
速度で行われており、この信号伝送速度に起因して１制
御チャネル装置が単位時間当りに移動体端末に対して伝
送可能な下り制御チャネル信号量に限界が存在する。On the other hand, the downlink control channel signal transmission from the radio base station to the mobile terminal is performed at the signal transmission rate specified in the specification. There is a limit to the amount of downlink control channel signals that can be transmitted to a mobile terminal per time.
【０００６】システム加入者の増加および呼量の増加に
連れて、下り制御チャネル信号量が増加し、やがてこの
限界下り制御チャネル信号量を越えると、伝送不可能な
下り制御チャネル信号が現われ、呼損が生じるという問
題点がある。As the number of system subscribers increases and the traffic volume increases, the downlink control channel signal volume increases. When the downlink control channel signal volume exceeds the limit downlink control channel signal volume, an untransmittable downlink control channel signal appears, and the call is transmitted. There is a problem that loss occurs.
【０００７】制御チャネル機能割付として１制御チャネ
ル装置にＤｅｄｉｃａｔｅｄ制御チャネル、Ｐａｇｉｎ
ｇ制御チャネルおよびＡｃｃｅｓｓ制御チャネルの各機
能をすべて割り付けた場合、制御チャネル信号の分散が
計れず１制御チャネル装置にすべての制御チャネル信号
が集中するため、下り制御チャネル信号量の処理限界が
早く訪れ、多くの呼量をサービスできないという問題点
がある。As a control channel function assignment, a dedicated control channel and a Pagin are assigned to one control channel device.
g When all the functions of the control channel and the access control channel are allocated, the dispersion of the control channel signals cannot be measured, and all the control channel signals are concentrated on one control channel device. However, there is a problem that a large amount of traffic cannot be serviced.
【０００８】制御チャネル機能割付として複数の制御チ
ャネル装置にＤｅｄｉｃａｔｅｄ制御チャネル、Ｐａｇ
ｉｎｇ制御チャネルおよびＡｃｃｅｓｓ制御チャネル機
能を分離して割り付けた場合、制御チャネル信号の分散
が計れる分だけ、より多くの呼量をサービスする事が可
能ではあるが、制御チャネル装置数が多くなるため、無
線基地局の電力消費量が大きくなり、またシステムコス
トが高くなるという問題点がある。[0008] As a control channel function allocation, a Dedicated control channel, Pag
When the ing control channel function and the Access control channel function are separately assigned, it is possible to service a larger traffic volume as much as the dispersion of the control channel signal can be measured, but since the number of control channel devices increases, There are problems that the power consumption of the radio base station increases and the system cost increases.
【０００９】[0009]
【課題を解決するための手段】本発明の制御チャネル切
り替え方式は、複数の移動体端末と制御信号の送受信を
行う制御チャネル用に常用系および予備系の制御チャネ
ル装置を有する無線基地局から構成される移動体通信シ
ステムにおいて、前記無線基地局は、下り制御チャネル
信号量上限しきい値および下り制御チャネル信号量下限
しきい値を保有する手段と、下り制御チャネル信号量を
計測する手段と、前記常用系の制御チャネル装置の状態
が動作中かつ前記予備系の制御チャネル装置の状態が待
機中、もしくは前記常用系の制御チャネル装置の状態が
待機中かつ前記予備系の制御チャネル装置の状態が動作
中にあり、計測された下り制御チャネル信号量が前記下
り制御チャネル信号量上限しきい値を越えている場合
に、前記常用系の制御チャネル装置と前記予備系の制御
チャネル装置の双方を動作させ制御チャネル動作の分割
を行う手段と、前記常用系の制御チャネル装置と前記予
備系の制御チャネル装置の双方が動作している状態で、
計測された下り制御チャネル信号量が前記下り制御チャ
ネル信号量下限しきい値を下回った場合、前記常用系の
制御チャネル装置のみ動作させ制御チャネル動作の統合
を行う手段とを有する構成である。A control channel switching method according to the present invention comprises a radio base station having a service channel system and a standby system control channel device for a control channel for transmitting and receiving control signals to and from a plurality of mobile terminals. In the mobile communication system to be performed, the radio base station has means for holding a downlink control channel signal amount upper threshold and a downlink control channel signal amount lower threshold, and means for measuring the downlink control channel signal amount, The state of the control channel device of the service system is operating and the state of the control channel device of the protection system is waiting, or the state of the control channel device of the service system is standby and the state of the control channel device of the protection system is During operation, when the measured downlink control channel signal amount exceeds the downlink control channel signal amount upper limit threshold, the control of the service system is performed. In a state in which the means for performing the division of both the operated control channel operation of the channel device backup system of the control channel system, both of the conventional system control channel device and the standby system control channel device is operating,
When the measured amount of downlink control channel signal falls below the lower threshold of the amount of downlink control channel signal, only the control channel device of the normal system is operated to integrate control channel operations.
【００１０】[0010]
【実施例】以下に、本発明について図面を参照して説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
【００１１】図１は本実施例の対象とされる移動体通信
システムの装置構成を示した図である。無線基地局２は
移動体電話交換局１と信号線および音声線の集合線であ
る音声・信号接続線１１により接続され、移動体電話端
末相互間あるいは移動体端末と一般有線電話端末間の通
話は、通話チャネル装置６と移動体電話交換局１を介し
て行われる。本実施例では通話チャネルは一つしか示さ
れていないが、実際には予想される呼量に応じて複数の
通話チャネルが設置される。FIG. 1 is a diagram showing a device configuration of a mobile communication system according to the present embodiment. The radio base station 2 is connected to the mobile telephone exchange 1 by a voice / signal connection line 11, which is an aggregate of signal lines and voice lines, and makes a call between mobile telephone terminals or between a mobile terminal and a general wired telephone terminal. Is performed via the communication channel device 6 and the mobile telephone exchange 1. Although only one communication channel is shown in the present embodiment, a plurality of communication channels are actually installed according to the expected traffic.
【００１２】制御チャネル構成は、１制御チャネル装置
がＤｅｄｉｃａｔｅｄ，Ｐａｇｉｎｇ，Ａｃｃｅｓｓの
すべての論理チャネル動作を行う最少構成である。ま
た、制御チャネルの動作の信頼性向上のため、本実施例
では現用制御チャネル装置４と予備制御チャネル装置５
によって、待機予備冗長構成がとられている。いずれの
制御チャネル装置も信号線１２を介して無線基地局主制
御装置３とマルチ接続される。The control channel configuration is a minimum configuration in which one control channel device performs all logical channel operations of Dedicated, Paging, and Access. In order to improve the reliability of the operation of the control channel, in the present embodiment, the working control channel device 4 and the backup control channel device 5 are used.
Thus, a standby redundant configuration is adopted. Each control channel device is multi-connected to the radio base station main controller 3 via the signal line 12.
【００１３】さらに制御チャネル装置４および５は信号
線１３および１４を介してアンテナ７および８と、通話
チャネル装置６は信号線１５を介してアンテナ９と接続
されている。The control channel devices 4 and 5 are connected to antennas 7 and 8 via signal lines 13 and 14, and the communication channel device 6 is connected to an antenna 9 via a signal line 15.
【００１４】次に、以上のような構成のＥＩＡ／ＴＩ
Ａ，ＴＡＣＳ仕様の移動体通信システムにおいて、本制
御チャネル切り替え方式を説明する。Next, the EIA / TI having the above configuration
A. The control channel switching method in the mobile communication system of the TACS specification will be described.
【００１５】無線基地局主制御装置３に下り制御チャネ
ル信号量上限しきい値と下り制御チャネル信号量下限し
きい値を予め決定し、保持させる。ここで、下り制御チ
ャネル信号量上限しきい値は、制御チャネル動作分割が
行われていない制御チャネル構成において、Ｄｅｄｉｃ
ａｔｅｄ制御チャネル信号、Ｐａｇｉｎｇ制御チャネル
信号およびＡｃｃｅｓｓ制御チャネル信号の総信号量が
任意の単位時間（これをｓｔと表す）に１制御チャネル
が伝送可能な下り制御チャネル信号量の伝送限界に近づ
き、制御チャネルの動作分割が必要であると判断する下
り制御チャネル信号量基準値である。また、下り制御チ
ャネル信号量下限しきい値は、制御チャネル動作分割が
行われている制御チャネル構成において、Ｄｅｄｉｃａ
ｔｅｄ制御チャネル信号、Ｐａｇｉｎｇ制御チャネル信
号およびＡｃｃｅｓｓ制御チャネル信号の総信号量が任
意の単位時間（ｓｔ）に１制御チャネルが伝送可能な下
り制御チャネル信号量の限界内になり、制御チャネルの
動作分割が不要であると判断する下り制御チャネル信号
量基準値である。これらは下り制御チャネル信号長およ
び下り制御チャネル信号伝送速度によりシステム毎に任
意の値が設定されるものとする。The radio base station main controller 3 determines the upper limit threshold value of the downlink control channel signal amount and the lower limit threshold value of the downlink control channel signal amount in advance and holds the same. Here, the downlink control channel signal amount upper limit threshold is equal to Dedicated in a control channel configuration in which control channel operation division is not performed.
When the total signal amount of the added control channel signal, the paging control channel signal, and the access control channel signal approaches the transmission limit of the downlink control channel signal amount that can transmit one control channel in an arbitrary unit time (this is represented by st), This is a downlink control channel signal amount reference value for determining that channel operation division is necessary. Further, the lower limit threshold value of the downlink control channel signal amount is Dedica in the control channel configuration in which the control channel operation division is performed.
The total signal amount of the ted control channel signal, the paging control channel signal, and the access control channel signal falls within the limit of the downlink control channel signal amount that can transmit one control channel in an arbitrary unit time (st), and the operation of the control channel is divided. Is a downlink control channel signal amount reference value that is determined to be unnecessary. These are set to arbitrary values for each system according to the downlink control channel signal length and the downlink control channel signal transmission rate.
【００１６】無線基地局２において、通信サービスが開
始されると無線基地局主制御装置３は常用制御チャネル
装置４を介して移動体端末へＤｅｄｉｃａｔｅｄ制御チ
ャネル信号、Ｐａｇｉｎｇ制御チャネル信号あるいはＡ
ｃｃｅｓｓ制御チャネル信号を送信する事となる。その
際、無線基地局主制御装置３は送信した下り制御チャネ
ル信号の信号長を下り制御チャネル信号量として加算す
る。すなわち無線基地局主制御装置３は下り制御チャネ
ル信号量の累計を計測する。In the radio base station 2, when a communication service is started, the radio base station main controller 3 sends a Dedicated control channel signal, a Paging control channel signal or an A control signal to the mobile terminal via the regular control channel device 4.
access control channel signal. At this time, the radio base station main controller 3 adds the signal length of the transmitted downlink control channel signal as the downlink control channel signal amount. That is, the wireless base station main controller 3 measures the total of the downlink control channel signal amount.
【００１７】一方、無線基地局主制御装置３はこの下り
制御チャネル信号量の累計を任意の単位時間（ｓｔ）周
期に下り制御チャネル信号量上限しきい値と比較すると
同時に、下り制御チャネル信号量の累計値をゼロに戻す
動作を繰り返す。On the other hand, the radio base station main controller 3 compares the total of the downlink control channel signal amount with the downlink control channel signal amount upper limit threshold in an arbitrary unit time (st) cycle, and The operation of resetting the accumulated value of n to zero is repeated.
【００１８】下り制御チャネル信号量と下り制御チャネ
ル信号上限しきい値の比較の結果、下り制御チャネル信
号量累計値が下り制御チャネル信号量上限しきい値を下
回っている場合、無線基地局主制御装置３は制御チャネ
ル切り替えを行う事は無いが、下り制御チャネル信号量
の累計値が下り制御チャネル信号量の上限値を越えてい
た場合、無線基地局主制御装置３は制御チャネル動作の
分割が必要であると判断し常用制御チャネル装置に加え
て、本来常用制御チャネル装置の保守あるいは障害が発
生した場合にのみ常用制御チャネル装置の代替を行う予
備制御チャネル装置を、同時に動作させて制御チャネル
動作の分割を行う。As a result of the comparison between the downlink control channel signal amount and the downlink control channel signal upper limit threshold, if the cumulative value of the downlink control channel signal amount is lower than the downlink control channel signal amount upper limit threshold, the radio base station main control The device 3 does not perform control channel switching, but if the cumulative value of the downlink control channel signal amount exceeds the upper limit value of the downlink control channel signal amount, the radio base station main controller 3 performs division of the control channel operation. In addition to the regular control channel device that is judged to be necessary, the spare control channel device that replaces the regular control channel device only when the maintenance or failure of the regular control channel device originally occurs is simultaneously operated to control the control channel. Is divided.
【００１９】その後、無線基地局主制御装置３は下り制
御チャネル信号量の累計を任意の単位時間（ｓｔ）周期
に下り制御チャネル信号量下限しきい値と比較すると同
時に、下り制御チャネル信号量の累計値をゼロに戻す動
作を繰り返す。Thereafter, the radio base station main controller 3 compares the cumulative amount of the downlink control channel signal amount with the lower limit threshold value of the downlink control channel signal amount at an arbitrary unit time (st) cycle, and simultaneously, The operation of returning the accumulated value to zero is repeated.
【００２０】下り制御チャネル信号量と下り制御チャネ
ル信号下限しきい値の比較の結果、下り制御チャネル信
号量累計値が下り制御チャネル信号量上限しきい値を上
回っている場合、無線基地局主制御装置３は制御チャネ
ル切り替えを行う事は無いが、下り制御チャネル信号量
の累計値が下り制御チャネル信号量の上限値を下回って
いた場合、無線基地局主制御装置３は制御チャネル動作
の分割は不要になったと判断し予備制御チャネル装置を
待機中に戻し、常用制御チャネル装置にＤｅｄｉｃａｔ
ｅｄ，ＰａｇｉｎｇおよびＡｃｃｅｓｓのすべての制御
チャネル動作を行わせ制御チャネル動作の分割を停止す
る。As a result of the comparison between the downlink control channel signal amount and the downlink control channel signal lower threshold value, if the cumulative downlink control channel signal amount value exceeds the downlink control channel signal amount upper threshold value, the radio base station main control Although the device 3 does not perform control channel switching, if the cumulative value of the downlink control channel signal amount is less than the upper limit value of the downlink control channel signal amount, the radio base station main controller 3 performs control channel operation division. Judging that it is no longer necessary, the standby control channel device is returned to the standby state, and the dedicated control channel device is dedicated to Dedicat.
All control channel operations of ed, Paging, and Access are performed, and division of the control channel operation is stopped.
【００２１】以後、無線基地局主制御装置３は再び下り
制御チャネル信号量累計値と下り制御チャネル信号量上
限しきい値の比較動作にもどり、前述した動作を繰り返
す事となる。これにより図２に示すような下り制御チャ
ネル信号量に基づく制御チャネル切り替えが実現できる
事になる。Thereafter, the radio base station main controller 3 returns to the operation of comparing the accumulated value of the downlink control channel signal amount and the upper threshold value of the downlink control channel signal amount again, and repeats the above operation. Thereby, control channel switching based on the downlink control channel signal amount as shown in FIG. 2 can be realized.
【００２２】[0022]
【発明の効果】以上説明したように本発明は、無線基地
局主制御装置が実際の下り制御チャネル信号量に基づい
て常用制御チャネル装置および予備制御チャネル装置を
同時に動作させ、制御チャネル構成を切り替え制御する
ように構成したので、無線基地局当りの制御チャネル装
置設置数が同一であっても、従来の方式よりもより多く
の通信サービスを提供する事が可能であり、また固定的
に制御チャネルの動作分割を行う従来の方式に比べ、制
御チャネル装置の設置数を必要最少限に抑える事が可能
である。As described above, according to the present invention, the main control device of the radio base station simultaneously operates the regular control channel device and the standby control channel device based on the actual downlink control channel signal amount, and switches the control channel configuration. Since it is configured to control, even if the number of control channel devices installed per radio base station is the same, it is possible to provide more communication services than the conventional method, and it is also possible to provide a fixed control channel. It is possible to reduce the number of installed control channel devices to the minimum necessary as compared with the conventional method of dividing the operation.
【図１】本発明の対象とされる移動体通信システムの装
置構成を示した図である。FIG. 1 is a diagram showing an apparatus configuration of a mobile communication system to which the present invention is applied.
【図２】本発明の一実施例の下り制御チャネル信号量に
基づいた制御チャネル切り替え動作を示した図である。FIG. 2 is a diagram illustrating a control channel switching operation based on a downlink control channel signal amount according to an embodiment of the present invention.
１ 移動体電話交換局 ２ 無線基地局 ３ 無線基地局主制御装置 ４ 現用制御チャネル装置 ５ 予備制御チャネル装置 ６ 通話チャネル装置 ７〜９ アンテナ １１ 音声・信号接続線 １２〜１５ 信号線 REFERENCE SIGNS LIST 1 mobile telephone exchange 2 radio base station 3 radio base station main controller 4 working control channel device 5 standby control channel device 6 speech channel device 7-9 antenna 11 voice / signal connection line 12-15 signal line
Claims (1)
行う制御チャネル用に常用系および予備系の制御チャネ
ル装置を有する無線基地局から構成される移動体通信シ
ステムにおいて、 前記無線基地局は、下り制御チャネル信号量上限しきい
値および下り制御チャネル信号量下限しきい値を保有す
る手段と、 下り制御チャネル信号量を計測する手段と、 前記常用系の制御チャネル装置の状態が動作中かつ前記
予備系の制御チャネル装置の状態が待機中、もしくは前
記常用系の制御チャネル装置の状態が待機中かつ前記予
備系の制御チャネル装置の状態が動作中にあり、計測さ
れた下り制御チャネル信号量が前記下り制御チャネル信
号量上限しきい値を越えている場合に、前記常用系の制
御チャネル装置と前記予備系の制御チャネル装置の双方
を動作させ制御チャネル動作の分割を行う手段と、 前記常用系の制御チャネル装置と前記予備系の制御チャ
ネル装置の双方が動作している状態で、計測された下り
制御チャネル信号量が前記下り制御チャネル信号量下限
しきい値を下回った場合、前記常用系の制御チャネル装
置のみ動作させ制御チャネル動作の統合を行う手段とを
有することを特徴とする制御チャネル切り替え方式。1. A mobile communication system comprising a radio base station having a control channel device of a service system and a protection system for a control channel for transmitting and receiving a control signal to and from a plurality of mobile terminals, wherein the radio base station comprises: Means for holding a downlink control channel signal amount upper limit threshold and a downlink control channel signal amount lower limit threshold, means for measuring the downlink control channel signal amount, The state of the standby control channel device is standby, or the status of the service control channel device is standby and the status of the standby control channel device is operating, and the measured downlink control channel signal amount. Is greater than the upper limit threshold value of the downlink control channel signal amount, when both the control channel device of the service system and the control channel device of the standby system are used. Means for operating and dividing the control channel operation, and in a state where both the service control channel device and the standby control channel device are operating, the measured downlink control channel signal amount is controlled by the downlink control. Means for operating only the control channel device of the ordinary system and integrating control channel operations when the channel signal amount falls below the lower limit threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4204602A JP2972446B2 (en) | 1992-07-31 | 1992-07-31 | Control channel switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4204602A JP2972446B2 (en) | 1992-07-31 | 1992-07-31 | Control channel switching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0653903A JPH0653903A (en) | 1994-02-25 |
| JP2972446B2 true JP2972446B2 (en) | 1999-11-08 |
Family
ID=16493182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4204602A Expired - Fee Related JP2972446B2 (en) | 1992-07-31 | 1992-07-31 | Control channel switching method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2972446B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4828359A (en) * | 1986-01-09 | 1989-05-09 | Sumitomo Electric Industries, Ltd. | Alkyl methacrylate homo - or copolymer optical waveguide for illumination and production of the same |
| JP3317253B2 (en) * | 1998-10-26 | 2002-08-26 | 日本電気株式会社 | Mobile communication system and data transfer method thereof |
| KR100426774B1 (en) * | 1998-12-16 | 2004-06-12 | 엘지전자 주식회사 | How to handle supplementary service messages at the exchange |
| KR20000039980A (en) * | 1998-12-16 | 2000-07-05 | 김영환 | Method for transmitting multi-message between service control part and subscriber registration part of communication system |
| JP3881196B2 (en) | 2001-06-27 | 2007-02-14 | 富士通株式会社 | Wireless base station equipment |
| US7448166B2 (en) | 2005-02-14 | 2008-11-11 | Toyota Motor Engineering & Manufacturing North America, Inc. | Cable guide mechanism for luggage handles |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0373629A (en) * | 1989-08-15 | 1991-03-28 | Matsushita Electric Ind Co Ltd | Cordless telephone set |
| JPH03108916A (en) * | 1989-09-22 | 1991-05-09 | Nippon Telegr & Teleph Corp <Ntt> | Mobile communication control system |
-
1992
- 1992-07-31 JP JP4204602A patent/JP2972446B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0653903A (en) | 1994-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7421282B2 (en) | Mobile communication system | |
| JP3019061B2 (en) | Mobile communication system and radio channel control method therefor | |
| JP2738384B2 (en) | Transmission power control method | |
| JP2809273B2 (en) | Mobile communication system | |
| CN1114119A (en) | Trunked communication system with automatic repeater talk-around | |
| JPH06284466A (en) | Mobile radio telephone communication device | |
| EP1360866B1 (en) | Resources allocation method and apparatus for the transmission of delay sensitive information in a mobile communication network | |
| KR20000022799A (en) | Hand-off control for reducing rate of occurrence of forced disconnection of communication | |
| JP2992563B2 (en) | Mobile communication system | |
| JP2972446B2 (en) | Control channel switching method | |
| US5666656A (en) | Selecting which main base station for an infill base station to monitor in a mobile radio system | |
| JP2946492B2 (en) | Cellular mobile communication system | |
| JP3110202B2 (en) | Frequency reuse method | |
| JPH06140985A (en) | Frequency arrangement control system | |
| JP2629640B2 (en) | Wireless line controller | |
| US6122518A (en) | Mobile communication system including base stations each having definite number of traffic channels | |
| JP3109943B2 (en) | Mobile communication device | |
| JPH0568285A (en) | Radio line control method for mobile communication system | |
| JP2979199B2 (en) | Communication traffic adaptive wireless zone configuration method | |
| JP3866497B2 (en) | Control channel assignment method and system in mobile communication | |
| JP3145985B2 (en) | Digital mobile radio communication system and data communication slot number determination method | |
| JPS6352824B2 (en) | ||
| JP3282708B2 (en) | Communication channel classification method | |
| JP2972222B2 (en) | Information service system in mobile communication | |
| JP3114545B2 (en) | Multi-rate mobile radio communication system |
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: 19990803 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |