JPH0686359A - Tracking exchange channel switching method for digital radio telephone system - Google Patents

Tracking exchange channel switching method for digital radio telephone system

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Publication number
JPH0686359A
JPH0686359A JP23108292A JP23108292A JPH0686359A JP H0686359 A JPH0686359 A JP H0686359A JP 23108292 A JP23108292 A JP 23108292A JP 23108292 A JP23108292 A JP 23108292A JP H0686359 A JPH0686359 A JP H0686359A
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Prior art keywords
base station
ccu
path
plurality
channel switching
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JP23108292A
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Japanese (ja)
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JP2806165B2 (en )
Inventor
Koji Fujimoto
浩司 藤本
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Nec Corp
日本電気株式会社
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Abstract

PURPOSE:To prevent the hit of a speech due to a time required for a synchronous establishment between a radio channel encoder (CCU) and a voice band compressor (TRAU) at the time of operating a tracking exchange channel switching in a digital radio telephone system. CONSTITUTION:A switchboard 10 and a base station controller 20 select and connect a CCU (#0) 400 and a TRAU (#0) 700 as the speech path of a mobile station(MS) 60 in a zone 500. When the MS 60 moves to a zone 501, the BS 20 previously connects the paths of a CCU (#2) 402 and a TRAU (#2) 702, and the switching instruction of the radio channel of the MS 60 and the path switching of the MSC 10 are operated after the synchronous establishment. Thus, the hit of the speech can be prevented.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【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。 The present invention relates to an tracked exchange channel switching method for a digital wireless telephone system, a tracking exchange channel switching method for a digital wireless telephone system in particular with a voice bandwidth compression device between the switch and the 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 Conventional digital wireless telephone system (hereinafter referred to as MSC) exchange as shown in FIG. 5 and 10, M
SC10により制御される基地局制御装置(以下BSC The base station controller which is controlled by the SC10 (hereinafter 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 Referred to as) 20, referred to as a plurality of radios (hereinafter referred to as TRX) 30 and is referred to as a radio channel encoder (hereinafter CCU) a plurality of base stations consisting of 400~40N (hereinafter BTS controlled by BSC 20) and 300~30P, 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 A plurality of voice-band compression apparatus arranged on MSC10 side between C10 and BSC 20 (hereinafter referred to as TRAU) 700
〜70mと、MSC10とBSC20とBTS300〜 And ~70m, MSC10 and BSC20 and BTS300~
30Pとを接続する複数のデジタル伝送装置(以下DT A plurality of digital transmission system connecting the 30P (hereinafter DT
Iと呼ぶ)80とから構成される。 Referred to as I) composed of 80.. 今、移動局(以下M Now, the mobile station (hereinafter referred to as 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 (State of using the path A-a in the path C-c, BSC 20 in the MSC 10, i.e. CCU (# 0) is referred to as S) 60 a state in which a call is located in zone 500 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。 0 and TRAU (# 0) for channel switching in moving 700 from the state) synchronization is taken between the zone 501 in the same BSC See also the sequence diagram of FIG. 6 will be described. 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、 When MSC10 in MS60 detects a need for channel switching to the zone 501 from the zone 500,
MSC10はBSC20へチャネル切替指示を出す。 MSC10 issues a channel switching instruction to BSC20. 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(# SC20 is vacant BTS301 zone 501 receives a channel switching instruction CCU (in this case CCU (#
2)402)にCCU稼動指示を出す。 It issues a CCU operation instruction 2) 402). BTS301ではCCU402が障害でなければ、BSC20に対しC If the BTS301 CCU402 is not a failure, C for BSC20
CU正常応答を返す。 CU returns a normal response. BSC20はBTS301からC BSC20 is C from BTS301
CU正常応答を受信すると、チャネル切替指示をBTS Upon receiving the CU normal response, the channel switching instruction BTS
300を介してMS60に送る。 Send to MS60 via the 300. 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 MS60 moves the BTSs of the radio channel in accordance with the instructions subjected to channel switching instruction, the switching response through BTSs BSC 20
へ上げる。 Increase to. BSC20は切替応答を受信すると、BSC When BSC20 receives a switching response, 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。 Switching the path A-a in 20 to the path B-b, it had sent a switch response to the MSC 10. CCU402とTRAU7 CCU402 and TRAU7
00はパス切替後に同期を開始していた。 00 had to start the synchronization after the path switching. 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。 Track exchange channels switched by the path switching in BSC20 ends.

【0003】また、CCUとTRUとを同数設け、CC [0003] Further, provided the same number of the CCU and TRU, 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。 Between U-TRU leave a constant synchronization state as a fixed path, it was also a method for performing path switching in 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。 [Problems that the Invention is to Solve tracking exchange channel switching method of the conventional digital wireless telephone system, in the first method requires establishing synchronization between the TRAU and the CCU after path switching, until locking can be established during the call in addition to the switched synchronization establishment of the radio channel is a problem that is instantaneous interruption.

【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 of the CCU-TRAU between the fixed path, the number of TRAU because CCU same number required, there is a disadvantage that the greater the number of resources TRAU.

【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、 Means for Solving the Problems] tracking exchange channel switching method for a digital wireless telephone system of the present invention includes a switch,
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、 A plurality of base station control apparatus having a switch capable of being controlled by said switch, a plurality of radios and radio channel coding device controlled by the base station controller,
移動局との間で無線による受信を行う複数の基地局と、 A plurality of base stations performing reception by radio with the mobile station,
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。 Digital transmission system for connecting a plurality of voice-band compression apparatus is arranged either in one of the devices between the exchange and the base station controller, the exchange, between the base station controller and the base station in digital radio telephone system composed of a, when said mobile station moves to an adjacent zone, the synchronization between the exchange and said audio band compression apparatus to the base station controller and the radio channel encoder path connect earlier for performs channel switching after establishment of synchronization.

【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。 EXAMPLES The present invention will be described below 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。 [0008] Figure 1 is a block diagram of one embodiment of a digital radio telephone system according to the present invention. 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 The system as shown in FIG. 1, (hereinafter referred to as MSC) exchange with a timer 11 and 10, (hereinafter referred to as BSC) base station controller which is controlled by the MSC10 and 20, BSC 20
により制御される複数の無線機(以下TRXと呼ぶ)3 A plurality of radio controlled by (hereinafter TRX hereinafter) 3
0と無線チャネル符号化装置(以下CCUと呼ぶ)40 0 and (hereinafter referred to as CCU) radio channel encoder 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 And a plurality of base stations (hereinafter referred to as BTS) 300~30P consisting of 0~40N, (hereinafter referred to as TRAU) a plurality of audio bandwidth compression device arranged on MSC10 side between the MSC10 and the BSC 20 700~70M and , 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 When a plurality of (hereinafter referred to as DTI) digital transmission device 80 for connecting the BSC20 and BTS300~30P, mobile station moving between a plurality of zones 500-501 (hereinafter MS
と呼ぶ)60とから構成されている。 It is composed of a called) 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 [0009] Now, MS 60 is within the state (MSC 10 that a call is located in zone 500 path 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 Within while using the path A-a, i.e. 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 (# 0) 400 and the TRAU state synchronization is taken between (# 0) 700), the zone within the same BSC 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。 For channel switching method when moving to 1, it will be described with reference also 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 [0010] MSC10 in MS60 detects the need for channel switching to zone 501 from the zone 50, M
SC10内の空TRAU(この場合TRAU(#2)7 Sky TRAU (in this case TRAU in the SC10 (# 2) 7
02を予約しBSC20に割当要求を出す。 02 to make a reservation issue an allocation request to BSC20. BSC20 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。 Upon receiving the allocation request, it issues a CCU operation instruction to the CCU that vacant BTS301 zone 501 (in this case CCU (# 2) 402). BTS301ではCCU402 In BTS301 CCU402
が障害でなければBSC20に対しCCU正常応答を返す。 But it returns a CCU normal response to the BSC20 if not failure. 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)。 BSC20 When receiving the CCU normal response from the BTSs, to form a path B-b connecting the CCU402 and TRAU702 (in FIG. 1). この場合パスA−a In this case the path A-a
はまだ切断されない。 It has not yet been cut. BSC20はパスB−bを接続後MSC10に対し同期開始を告げる。 BSC20 tells initiate synchronization to connect after MSC10 the path B-b. MSC10はBS MSC10 is BS
C20から同期開始を受けるとタイマー11を起動する。 To start the subject when the timer 11 to start synchronization from C20. このタイマー11はCCU402とTRAU702 The timer 11 is CCU402 the 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。 Door is the time required to establish synchronization has been set.
タイマータイムアウト後MSC10はBSC20,BT After the timer timeout MSC10 is BSC20, BT
S300を介してMS60にチャネル切替指示を送る。 Send a channel switching instruction to MS60 via the S300.
MS60はチャネル切替指示を受けると指示に従いBT MS60 is BT in accordance with the instructions receive the channel switching instruction
S301の無線チャネルに移り、切替応答をBTS30 Moves to S301 in the radio channel, BTS 30 a switching response
1を介してBSC20,MSC10に上げる。 Through a 1 increase in BSC20, MSC10. BSC2 BSC2
0ではパスA−aを切断し、MSC10ではパスC−c 0 In cutting the path A-a, the MSC10 path C-c
をパスD−cへ切替える(図1の)。 It switches the to the path D-c (in FIG. 1). 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。 Channel switching tracking exchanged by path switching at MSC10 ends.

【0011】次に図3,4を参照してBSC21側にT [0011] Then T in BSC21 side with reference to FIGS
RAU700〜70mを配置した場合の実施例につき説明する。 It will be described embodiments in the case where a RAU700~70m. この第2の実施例において、TRAU700〜 In this second embodiment, 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。 70m is disposed on BSC21 side, a configuration of connecting the two paths B-b of the path A-a and MSC side of the BTS-side by the switch in BSC21. MSC10からBSC21へチャネル切替指示を出すとBSC21はB From MSC10 to BSC21 it issues a channel switching instruction and BSC21 is 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。 TS hand, issues a CCU operation instruction, CCU newly connect the path B-b of the receiving the normal response BTS side, activates a timer 11. この時パスA−aは切断しない。 At this time, the path A-a is not cut. 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。 The timer 11 is not set to the time until the CCU402 and TRAU702 to establish synchronization, after a timeout, BSC21 issues a channel switching instruction to the MS 60. 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。 BSC21 When receiving the switching response from the MS 60, switches the path C-c of MSC10 side path D-c. このパス切替により追跡交換チャネル切替は終了する。 Track exchange channels switched by the path switching is completed. BSC21はBTC側のパスA−aを切断し、切替応答をMSC10へ返す。 BSC21 cleaves path A-a of 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 The present invention described above, according to the present invention, upon tracking exchange in a digital radio telephone system was established synchronization of the audio band compressor and (TRAU) radio channel encoder and (CCU) before channel switching because, 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。 It has the result of eliminating instantaneous interruption due to asynchronous state between the 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 Further, by applying the present invention, in the configuration of a digital wireless telephone system, CCU 1-one
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。 And than configured to be in a state so arranged taking advance synchronize TRAU, it is possible to reduce the number of resources of the TRAU.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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。 1 is a block diagram of an embodiment of a wireless telephone system according to 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。 2 is a sequence diagram showing the control operation of the present invention in this embodiment of FIG.

【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。 3 is a block diagram of another embodiment of a wireless telephone system according to the present invention.

【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。 4 is a sequence diagram showing the 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。 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。 6 is a sequence diagram of a conventional example of FIG.

【符号の説明】 DESCRIPTION OF SYMBOLS

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) 10 exchange (MSC) 11 timer 20, 21 base station controller (BSC) 30 radio (TRX) 60 mobile station 80 digital transmission equipment (DTI) 300~30P base station (BTS) 400~40n radio channel encoder ( CCU) 500~501 zone 700~70m voice bandwidth compression unit (TRAU)

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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ことを特徴とするデジタル無線電 And 1. A switch, a plurality of base station control apparatus having a switch capable of being controlled by said switch, a plurality of radios and radio channel coding device controlled by the base station controller, mobile station a plurality of base stations performing reception by radio between a plurality of audio band compression apparatus is arranged either in one of the devices between the exchange and the base station controller, the exchange, the base in digital radio telephone system composed of a digital transmission system connecting the station controller and the base station, when the mobile station moves to an adjacent zone, the voice said switching equipment to the base station controller digital radio electropneumatic connecting a path for the synchronization between the bandwidth compression apparatus and the radio channel encoding device previously, and performs the channel switching after synchronization establishment システムの追跡交換チャネル切替方法。 Track exchange channel switching method of the system.
JP23108292A 1992-08-31 1992-08-31 Track exchange channel switching method for a digital wireless telephone system Expired - Fee Related JP2806165B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23108292A JP2806165B2 (en) 1992-08-31 1992-08-31 Track exchange channel switching method for a digital wireless telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23108292A JP2806165B2 (en) 1992-08-31 1992-08-31 Track exchange channel switching method for a digital wireless telephone system

Publications (2)

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JPH0686359A true true JPH0686359A (en) 1994-03-25
JP2806165B2 JP2806165B2 (en) 1998-09-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6311065B1 (en) 1997-02-12 2001-10-30 Fujitsu Limited Mobile communication system for predicting a transfer location of a mobile station
US8337049B2 (en) 2008-07-07 2012-12-25 Panasonic Corporation Bulb-type lighting source

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6311065B1 (en) 1997-02-12 2001-10-30 Fujitsu Limited Mobile communication system for predicting a transfer location of a mobile station
US8337049B2 (en) 2008-07-07 2012-12-25 Panasonic Corporation Bulb-type lighting source

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Publication number Publication date Type
JP2806165B2 (en) 1998-09-30 grant

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