JP2806165B2 - Tracking switching channel switching method for digital wireless telephone system - Google Patents
Tracking switching channel switching method for digital wireless telephone systemInfo
- Publication number
- JP2806165B2 JP2806165B2 JP23108292A JP23108292A JP2806165B2 JP 2806165 B2 JP2806165 B2 JP 2806165B2 JP 23108292 A JP23108292 A JP 23108292A JP 23108292 A JP23108292 A JP 23108292A JP 2806165 B2 JP2806165 B2 JP 2806165B2
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- Japan
- Prior art keywords
- base station
- switching
- path
- exchange
- bsc
- Prior art date
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- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はデジタル無線電話システ
ムの追跡交換チャネル切替方法に関し、特に交換機と基
地局制御装置との間に音声帯域圧縮装置を持つデジタル
無線電話システムの追跡交換チャネル切替方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tracking switching channel switching method for a digital radio telephone system, and more particularly to a tracking switching channel switching method for a digital radio telephone system having a voice band compression device between a switch and a base station controller. .
【０００２】[0002]
【従来の技術】従来のデジタル無線電話システムは、図
５に示すように交換機（以下ＭＳＣと呼ぶ）１０と、Ｍ
ＳＣ１０により制御される基地局制御装置（以下ＢＳＣ
と呼ぶ）２０と、ＢＳＣ２０により制御される複数の無
線機（以下ＴＲＸと呼ぶ）３０と無線チャネル符号化装
置（以下ＣＣＵと呼ぶ）４００〜４０ｎとから成る複数
の基地局（以下ＢＴＳと呼ぶ）３００〜３０Ｐと、ＭＳ
Ｃ１０とＢＳＣ２０との間でＭＳＣ１０側に配置された
複数の音声帯域圧縮装置（以下ＴＲＡＵと呼ぶ）７００
〜７０ｍと、ＭＳＣ１０とＢＳＣ２０とＢＴＳ３００〜
３０Ｐとを接続する複数のデジタル伝送装置（以下ＤＴ
Ｉと呼ぶ）８０とから構成される。今、移動局（以下Ｍ
Ｓと呼ぶ）６０がゾーン５００に位置して通話している
状態（ＭＳＣ１０内でパスＣ−ｃ，ＢＳＣ２０内でパス
Ａ−ａを使っている状態、すなわちＣＣＵ（＃０）４０
０とＴＲＡＵ（＃０）７００との間で同期がとられてい
る状態）から同一ＢＳＣ内のゾーン５０１へ移動する場
合のチャネル切替について図６のシーケンス図も参照し
て説明する。ＭＳＣ１０でＭＳ６０がゾーン５００から
ゾーン５０１へのチャネル切替の必要性を検出すると、
ＭＳＣ１０はＢＳＣ２０へチャネル切替指示を出す。Ｂ
ＳＣ２０はチャネル切替指示を受けるとゾーン５０１の
ＢＴＳ３０１の空いているＣＣＵ（この場合ＣＣＵ（＃
２）４０２）にＣＣＵ稼動指示を出す。ＢＴＳ３０１で
はＣＣＵ４０２が障害でなければ、ＢＳＣ２０に対しＣ
ＣＵ正常応答を返す。ＢＳＣ２０はＢＴＳ３０１からＣ
ＣＵ正常応答を受信すると、チャネル切替指示をＢＴＳ
３００を介してＭＳ６０に送る。ＭＳ６０はチャネル切
替指示を受けると指示に従いＢＴＳ３０１の無線チャネ
ルに移り、切替応答をＢＴＳ３０１を介してＢＳＣ２０
へ上げる。ＢＳＣ２０は切替応答を受信すると、ＢＳＣ
２０内のパスＡ−ａをパスＢ−ｂに切替え、切替え応答
をＭＳＣ１０へ送っていた。ＣＣＵ４０２とＴＲＡＵ７
００はパス切替後に同期を開始していた。ＢＳＣ２０内
のパス切替により追跡交換チャネル切替は終了する。2. Description of the Related Art As shown in FIG. 5, a conventional digital radio telephone system includes an exchange (hereinafter referred to as MSC) 10 and
A base station controller controlled by the SC 10 (hereinafter referred to as BSC
) 20, a plurality of radios (hereinafter referred to as TRX) 30 controlled by the BSC 20, and a plurality of base stations (hereinafter referred to as BTS) including radio channel coding devices (hereinafter referred to as CCUs) 400 to 40 n. 300-30P and MS
A plurality of audio band compression devices (hereinafter referred to as TRAUs) 700 arranged on the MSC 10 side between the C10 and the BSC 20
~ 70m, MSC10, BSC20 and BTS300 ~
30P and a plurality of digital transmission devices (hereinafter referred to as DT)
80). Now, the mobile station (hereinafter M
S (calling S) is located in the zone 500 and talking (the path C-c in the MSC 10 and the path A-a in the BSC 20, ie, the CCU (# 0) 40).
Channel switching when moving from zone 0 to TRAU (# 0) 700) to zone 501 in the same BSC will be described with reference to the sequence diagram of FIG. When the MS 60 detects the necessity of channel switching from the zone 500 to the zone 501 in the MSC 10,
The MSC 10 issues a channel switching instruction to the BSC 20. B
When receiving the channel switching instruction, the SC 20 empties the CTS of the BTS 301 in the zone 501 (in this case, the CCU (#
2) A CCU operation instruction is issued in 402). In the BTS 301, if the CCU 402 does not have a failure, the BSC 20
Returns a CU normal response. The BSC 20 receives C from the BTS 301
When the CU normal response is received, the channel switching instruction is transmitted to the BTS.
Send to MS 60 via 300. When receiving the channel switching instruction, the MS 60 shifts to the wireless channel of the BTS 301 according to the instruction, and transmits a switching response to the BSC 20 via the BTS 301.
Raise to When the BSC 20 receives the switch response, the BSC 20
The path Aa within the path 20 is switched to the path Bb, and a switching response is sent to the MSC 10. CCU402 and TRAU7
00 starts synchronization after path switching. The tracking switching channel switching is completed by the path switching in the BSC 20.
【０００３】また、ＣＣＵとＴＲＵとを同数設け、ＣＣ
Ｕ−ＴＲＵ間を固定パスとして常時同期状態としてお
き、ＭＳＣ内でパス切替を行う方法もあった。In addition, the same number of CCUs and TRUs are provided,
There is also a method in which the U-TRU is always in a synchronized state as a fixed path and the path is switched within the MSC.
【０００４】[0004]
【発明が解決しようとする課題】この従来のデジタル無
線電話システムの追跡交換チャネル切替方法は、第１の
方法では、パス切替後にＴＲＡＵとＣＣＵとの間に同期
確立を必要とし、同期がとれるまでの間、無線チャネル
の切替後同期確立以外にも通話が瞬断されるという問題
点があった。According to the first conventional tracking switching channel switching method for a digital radio telephone system, in the first method, it is necessary to establish synchronization between the TRAU and the CCU after the path switching, and until the synchronization is established. During this period, there is a problem that a call is instantaneously interrupted in addition to the establishment of synchronization after switching of the wireless channel.
【０００５】また、ＣＣＵ−ＴＲＡＵ間を固定パスにす
る第２の方法では、ＴＲＡＵの数がＣＣＵと同数必要な
ため、ＴＲＡＵの資源数が多くなる欠点があった。[0005] In the second method in which a fixed path is used between the CCU and the TRAU, the number of TRAUs is required to be the same as the number of CCUs, so that the number of TRAU resources is disadvantageously increased.
【０００６】[0006]
【課題を解決するための手段】本発明のデジタル無線電
話システムの追跡交換チャネル切替方法は、交換機と、
前記交換機により制御されるスイッチ能力を持つ複数の
基地局制御装置と、前記基地局制御装置により制御され
る複数の無線機及び無線チャネル符号化装置から成り、
移動局との間で無線による受信を行う複数の基地局と、
前記交換機と前記基地局制御装置との間でどちらか一方
の装置内に配置される複数の音声帯域圧縮装置と、前記
交換機，前記基地局制御装置及び前記基地局の間を接続
するデジタル伝送装置とから構成されるデジタル無線電
話システムにおいて、前記移動局が隣接ゾーンへ移動し
た場合、前記交換機が前記基地局制御装置に対して前記
音声帯域圧縮装置と前記無線チャネル符号化装置との間
の同期のためのパスを先に接続し、同期確立後にチャネ
ル切替を行う。A tracking switching channel switching method for a digital radio telephone system according to the present invention comprises the steps of:
A plurality of base station controllers having a switching capability controlled by the switch, and a plurality of radios and radio channel coding devices controlled by the base station controller;
A plurality of base stations performing radio reception with a mobile station;
A plurality of voice band compression devices disposed in one of the devices between the exchange and the base station control device; and a digital transmission device connecting the exchange, the base station control device, and the base station. In the digital radio telephone system, when the mobile station moves to the adjacent zone, the exchange switches the base station controller to the synchronization between the voice band compression device and the radio channel coding device. Path is connected first, and channel switching is performed after synchronization is established.
【０００７】[0007]
【実施例】次に本発明について図面を参照して説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.
【０００８】図１は本発明を適用したデジタル無線電話
システムの一実施例のブロック図である。図１に示すよ
うに本システムは、タイマー１１を有する交換機（以下
ＭＳＣと呼ぶ）１０と、ＭＳＣ１０により制御される基
地局制御装置（以下ＢＳＣと呼ぶ）２０と、ＢＳＣ２０
により制御される複数の無線機（以下ＴＲＸと呼ぶ）３
０と無線チャネル符号化装置（以下ＣＣＵと呼ぶ）４０
０〜４０ｎとから成る複数の基地局（以下ＢＴＳと呼
ぶ）３００〜３０Ｐと、ＭＳＣ１０とＢＳＣ２０との間
でＭＳＣ１０側に配置された複数の音声帯域圧縮装置
（以下ＴＲＡＵと呼ぶ）７００〜７０ｍと、ＭＳＣ１０
とＢＳＣ２０とＢＴＳ３００〜３０Ｐとを接続する複数
のデジタル伝送装置（以下ＤＴＩと呼ぶ）８０と、複数
のゾーン５００〜５０１間を移動する移動局（以下ＭＳ
と呼ぶ）６０とから構成されている。FIG. 1 is a block diagram showing an embodiment of a digital radio telephone system to which the present invention is applied. As shown in FIG. 1, the system includes an exchange (hereinafter, referred to as MSC) 10 having a timer 11, a base station controller (hereinafter, referred to as BSC) 20 controlled by the MSC 10, a BSC 20.
(Hereinafter referred to as TRX) controlled by a plurality of wireless devices 3
0 and a radio channel encoder (hereinafter referred to as CCU) 40
A plurality of base stations (hereinafter, referred to as BTSs) 300 to 30P including 0 to 40n, and a plurality of audio band compression devices (hereinafter, referred to as TRAUs) 700 to 70m arranged on the MSC 10 side between the MSC 10 and the BSC 20. , MSC10
A plurality of digital transmission devices (hereinafter, referred to as DTIs) 80 connecting the BSC 20 and the BTSs 300 to 30P, and a mobile station (hereinafter referred to as an MS) moving between a plurality of zones 500 to 501.
60).
【０００９】今、ＭＳ６０がゾーン５００に位置して通
話している状態（ＭＳＣ１０内でパスＣ−ｃ，ＢＳＣ２
０内でパスＡ−ａを使用している状態、すなわちＣＣＵ
（＃０）４００とＴＲＡＵ（＃０）７００との間で同期
がとられている状態）から、同一ＢＳＣ内のゾーン５０
１へ移動する場合のチャネル切替方法について、図２の
シーケンス図も参照して説明する。Now, a state in which the MS 60 is located in the zone 500 and is in a call (in the MSC 10 the paths Cc and BSC2)
0, the path Aa is being used, ie, the CCU
(Synchronization between (# 0) 400 and TRAU (# 0) 700) from zone 50 in the same BSC.
The channel switching method when moving to 1 will be described with reference to the sequence diagram of FIG.
【００１０】ＭＳＣ１０でＭＳ６０がゾーン５０からゾ
ーン５０１へのチャネル切替の必要性を検出すると、Ｍ
ＳＣ１０内の空ＴＲＡＵ（この場合ＴＲＡＵ（＃２）７
０２を予約しＢＳＣ２０に割当要求を出す。ＢＳＣ２０
は割当要求を受けると、ゾーン５０１のＢＴＳ３０１の
空いているＣＣＵ（この場合ＣＣＵ（＃２）４０２）に
ＣＣＵ稼動指示を出す。ＢＴＳ３０１ではＣＣＵ４０２
が障害でなければＢＳＣ２０に対しＣＣＵ正常応答を返
す。ＢＳＣ２０はＢＴＳ３０１からＣＣＵ正常応答を受
信すると、ＣＣＵ４０２とＴＲＡＵ７０２と接続するパ
スＢ−ｂを形成する（図１の）。この場合パスＡ−ａ
はまだ切断されない。ＢＳＣ２０はパスＢ−ｂを接続後
ＭＳＣ１０に対し同期開始を告げる。ＭＳＣ１０はＢＳ
Ｃ２０から同期開始を受けるとタイマー１１を起動す
る。このタイマー１１はＣＣＵ４０２とＴＲＡＵ７０２
とが同期確立するのに要する時間がセットされている。
タイマータイムアウト後ＭＳＣ１０はＢＳＣ２０，ＢＴ
Ｓ３００を介してＭＳ６０にチャネル切替指示を送る。
ＭＳ６０はチャネル切替指示を受けると指示に従いＢＴ
Ｓ３０１の無線チャネルに移り、切替応答をＢＴＳ３０
１を介してＢＳＣ２０，ＭＳＣ１０に上げる。ＢＳＣ２
０ではパスＡ−ａを切断し、ＭＳＣ１０ではパスＣ−ｃ
をパスＤ−ｃへ切替える（図１の）。ＭＳＣ１０での
パス切替により追跡交換のチャネル切替は終了する。When the MS 60 detects the necessity of channel switching from the zone 50 to the zone 501, the MSC 10
Empty TRAU in SC10 (in this case, TRAU (# 2) 7
02 is reserved and an allocation request is issued to the BSC 20. BSC20
, Upon receiving the allocation request, issues a CCU operation instruction to a vacant CCU of the BTS 301 in the zone 501 (in this case, CCU (# 2) 402). In the BTS 301, the CCU 402
If no failure occurs, a normal CCU response is returned to the BSC 20. When the BSC 20 receives the CCU normal response from the BTS 301, it forms a path Bb connecting the CCU 402 and the TRAU 702 (FIG. 1). In this case, the path A-a
Is not disconnected yet. After connecting the path Bb, the BSC 20 notifies the MSC 10 of the start of synchronization. MSC10 is BS
Upon receiving the synchronization start from C20, the timer 11 is started. This timer 11 is provided by the CCU 402 and the TRAU 702.
And the time required for establishing synchronization with this is set.
After the timer times out, MSC10 becomes BSC20, BT
A channel switching instruction is sent to the MS 60 via S300.
Upon receiving the channel switching instruction, the MS 60 performs BT
The process proceeds to the wireless channel of S301, and the switching response is transmitted to the BTS 30.
1 to BSC20 and MSC10. BSC2
At 0, the path Aa is disconnected, and at the MSC 10, the path Cc
To the path Dc (FIG. 1). The channel switching of the tracking exchange is completed by the path switching in the MSC 10.
【００１１】次に図３，４を参照してＢＳＣ２１側にＴ
ＲＡＵ７００〜７０ｍを配置した場合の実施例につき説
明する。この第２の実施例において、ＴＲＡＵ７００〜
７０ｍはＢＳＣ２１側に配置され、ＢＳＣ２１内のスイ
ッチによりＢＴＳ側とのパスＡ−ａ及びＭＳＣ側とのパ
スＢ−ｂの２つを接続する構成である。ＭＳＣ１０から
ＢＳＣ２１へチャネル切替指示を出すとＢＳＣ２１はＢ
ＴＳに対し、ＣＣＵ稼動指示を出し、ＣＣＵ正常応答を
受信するとＢＴＳ側のパスＢ−ｂを新しく接続し、タイ
マー１１を起動させる。この時パスＡ−ａは切断しな
い。タイマー１１はＣＣＵ４０２とＴＲＡＵ７０２とが
同期を確立するまでの時間にセットされていて、タイム
アウト後、ＢＳＣ２１はＭＳ６０にチャネル切替指示を
出す。ＢＳＣ２１はＭＳ６０からの切替応答を受信する
と、ＭＳＣ１０側のパスＣ−ｃをパスＤ−ｃに切り替え
る。このパス切替により追跡交換チャネル切替は終了す
る。ＢＳＣ２１はＢＴＣ側のパスＡ−ａを切断し、切替
応答をＭＳＣ１０へ返す。Next, referring to FIGS.
An embodiment in which RAUs 700 to 70 m are arranged will be described. In the second embodiment, the TRAU 700-
70m is arranged on the BSC 21 side, and has a configuration in which two switches, a path A-a to the BTS side and a path B-b to the MSC side, are connected by a switch in the BSC 21. When the MSC 10 issues a channel switching instruction to the BSC 21, the BSC 21
When a CCU operation instruction is issued to the TS and a CCU normal response is received, the path Bb on the BTS side is newly connected and the timer 11 is started. At this time, the path A-a is not disconnected. The timer 11 is set to a time until the CCU 402 and the TRAU 702 establish synchronization. After a timeout, the BSC 21 issues a channel switching instruction to the MS 60. Upon receiving the switching response from the MS 60, the BSC 21 switches the path CC on the MSC 10 side to the path Dc. The tracking switching channel switching is completed by this path switching. The BSC 21 disconnects the path A-a on the BTC side, and returns a switching response to the MSC 10.
【００１２】[0012]
【発明の効果】以上説明したように本発明は、デジタル
無線電話システムにおける追跡交換に際し、チャネル切
替前に音声帯域圧縮装置（ＴＲＡＵ）と無線チャネル符
号化装置（ＣＣＵ）との同期を確立させたので、ＴＲＡ
ＵとＣＣＵとの間の非同期状態による瞬断をなくすとい
う結果を有する。As described above, according to the present invention, the synchronization between the voice band compression unit (TRAU) and the radio channel coding unit (CCU) is established before the channel switching in the tracking exchange in the digital radio telephone system. So TRA
This has the consequence of eliminating momentary interruptions due to out-of-sync conditions between U and CCU.
【００１３】また、本発明を適用することにより、デジ
タル無線電話システムの構成において、１対１にＣＣＵ
とＴＲＡＵを配置させてあらかじめ同期をとっている状
態にしておく構成よりも、ＴＲＡＵの資源数を節約する
ことができる。Also, by applying the present invention, in the configuration of the digital radio telephone system, the CCU is one-to-one.
And the number of TRAU resources can be reduced as compared with a configuration in which the TRAUs and TRAUs are arranged and synchronized in advance.
【図１】本発明を適用した無線電話システムの一実施例
のブロック図である。FIG. 1 is a block diagram of a wireless telephone system according to an embodiment of the present invention.
【図２】図１の本実施例における本発明の制御動作を示
すシーケンス図である。FIG. 2 is a sequence diagram showing a control operation of the present invention in the embodiment of FIG. 1;
【図３】本発明を適用した無線電話システムの他の実施
例のブロック図である。FIG. 3 is a block diagram of another embodiment of the wireless telephone system to which the present invention is applied.
【図４】図３の実施例における本発明の制御動作を示す
シーケンス図である。FIG. 4 is a sequence diagram showing a control operation of the present invention in the embodiment of FIG.
【図５】従来例のブロック図である。FIG. 5 is a block diagram of a conventional example.
【図６】図５の従来例のシーケンス図である。FIG. 6 is a sequence diagram of the conventional example of FIG.
１０ 交換機（ＭＳＣ） １１ タイマー ２０，２１ 基地局制御装置（ＢＳＣ） ３０ 無線機（ＴＲＸ） ６０ 移動局 ８０ デジタル伝送装置（ＤＴＩ） ３００〜３０Ｐ 基地局（ＢＴＳ） ４００〜４０ｎ 無線チャネル符号化装置（ＣＣＵ） ５００〜５０１ ゾーン ７００〜７０ｍ 音声帯域圧縮装置（ＴＲＡＵ） Reference Signs List 10 exchange (MSC) 11 timer 20, 21 base station controller (BSC) 30 radio (TRX) 60 mobile station 80 digital transmission device (DTI) 300-30P base station (BTS) 400-40n radio channel coding device ( CCU) 500-501 zone 700-70m Audio band compression unit (TRAU)
Claims (1)
スイッチ能力を持つ複数の基地局制御装置と、前記基地
局制御装置により制御される複数の無線機及び無線チャ
ネル符号化装置から成り、移動局との間で無線による受
信を行う複数の基地局と、前記交換機と前記基地局制御
装置との間でどちらか一方の装置内に配置される複数の
音声帯域圧縮装置と、前記交換機，前記基地局制御装置
及び前記基地局の間を接続するデジタル伝送装置とから
構成されるデジタル無線電話システムにおいて、 前記移動局が隣接ゾーンへ移動した場合、前記交換機が
前記基地局制御装置に対して前記音声帯域圧縮装置と前
記無線チャネル符号化装置との間の同期のためのパスを
先に接続し、同期確立後にチャネル切替を行うことを特
徴とするデジタル無線電話システムの追跡交換チャネル
切替方法。1. A mobile station comprising: an exchange; a plurality of base station controllers having a switching capability controlled by the exchange; a plurality of radios and a radio channel encoder controlled by the base station controller; A plurality of base stations for performing wireless reception between the base station and a plurality of voice band compression devices disposed in one of the devices between the exchange and the base station control device; In a digital radio telephone system comprising a station control device and a digital transmission device connecting between the base station, when the mobile station moves to an adjacent zone, the exchange sends the voice to the base station control device. A path for synchronization between a band compression apparatus and the wireless channel coding apparatus is connected first, and channel switching is performed after synchronization is established; Track exchange channel switching method of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23108292A JP2806165B2 (en) | 1992-08-31 | 1992-08-31 | Tracking switching channel switching method for digital wireless telephone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23108292A JP2806165B2 (en) | 1992-08-31 | 1992-08-31 | Tracking switching channel switching method for digital wireless telephone system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0686359A JPH0686359A (en) | 1994-03-25 |
| JP2806165B2 true JP2806165B2 (en) | 1998-09-30 |
Family
ID=16918008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23108292A Expired - Fee Related JP2806165B2 (en) | 1992-08-31 | 1992-08-31 | Tracking switching channel switching method for digital wireless telephone system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2806165B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10290475A (en) | 1997-02-12 | 1998-10-27 | Fujitsu Ltd | Mobile communication system |
| JP5129329B2 (en) | 2008-07-07 | 2013-01-30 | パナソニック株式会社 | Light source for bulb-type lighting |
-
1992
- 1992-08-31 JP JP23108292A patent/JP2806165B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0686359A (en) | 1994-03-25 |
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