IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0571737
(2004-07-06)
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등록번호 |
US-7778215
(2010-09-06)
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국제출원번호 |
PCT/CN2004/000760
(2004-07-06)
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§371/§102 date |
20070105
(20070105)
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국제공개번호 |
WO06/002576
(2006-01-12)
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발명자
/ 주소 |
- Xie, Guosheng
- Ren, Gang
- Wu, Qiang
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
5 |
초록
▼
A digital trunked communication network which supports roaming, includes a plurality of trunked communication systems, each of which comprises a base station subsystem and a dispatching subsystem; wherein base station subsystem is used to access various services of a terminal, and to forward trunked
A digital trunked communication network which supports roaming, includes a plurality of trunked communication systems, each of which comprises a base station subsystem and a dispatching subsystem; wherein base station subsystem is used to access various services of a terminal, and to forward trunked service to dispatching subsystem; dispatching subsystem is used to control and manage the trunked service of terminal which locates in its service area, and dispatching subsystems are connected together by IP network. The present invention divides the single control center of existing system into several independent subsystems by employing modularized network organization, thereby making the design and realization of various services clearer and more independent and effectively reducing the complexity of the system and coupling among various services. In addition, the present invention also provides a trunked roaming method which takes the home trunked system as control point in calling layer, thereby ensuring that the system consistently process roaming, non-roaming calls.
대표청구항
▼
What is claimed is: 1. A roaming method for a digital trunked communication network, comprising: originating, by a roaming subscriber, a dispatch call request; conducting, by a visited dispatching subsystem serving the roaming subscriber, routing according to subscriber identification code informat
What is claimed is: 1. A roaming method for a digital trunked communication network, comprising: originating, by a roaming subscriber, a dispatch call request; conducting, by a visited dispatching subsystem serving the roaming subscriber, routing according to subscriber identification code information of the roaming subscriber; sending, by the visited dispatching subsystem, an authentication request to a home dispatching subsystem of the roaming subscriber; authenticating, by the home dispatching subsystem, the roaming subscriber; forwarding, by the visited dispatching subsystem, the dispatch call request to the home dispatching subsystem; originating, by the home dispatching subsystem, a trunked connection request to one or more subscribers to be involved in the dispatch call; receiving, by the home dispatching subsystem, a call establishment completion notification upon the dispatch call being established; and sending, by the home dispatching subsystem, a dispatch call authorization to the one or more subscribers. 2. The roaming method for the digital trunked communication network according to claim 1, wherein the visited dispatching subsystem comprises a visited dispatching server, a visited dispatching home register and a visited trunked gateway, and the home dispatching subsystem comprises a home dispatching server, a home dispatching home register and a home trunked gateway, the method comprising: sending, by the roaming subscriber, the dispatch call request to the visited dispatching server; sending, by the visited dispatching server, an authentication request to the visited dispatching home register; selecting, by the visited dispatching home register, a route according to the subscriber identification code information; forwarding, by the visited dispatching home register, the authentication request to the home dispatching home register; authenticating and authorizing, by the home dispatching home register, the roaming subscriber; returning, by the home dispatching home register, an authentication response to the visited dispatching home register; returning, by the visited dispatching home register, the authentication response to the visited dispatching server; forwarding, by the visited dispatching server, the dispatch call request to the visited trunked gateway according to subscriber's home information returned via the authentication response; translating, by the visited trunked gateway, the received dispatch call request into a form of external signaling; routing, by the visited trunked gateway, the external signaling to the home trunked gateway; translating, by the home trunked gateway, the external signaling into the dispatch call request, forwarding, by the home trunked gateway, the dispatch call request to the home dispatching server; sending, by the home dispatching server, the trunked connection request to the home trunked gateway if the subscriber is a roaming subscriber; translating, by the home trunked gateway, the trunked connection request into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the trunked connection request; forwarding, by the visited trunked gateway, the trunked connection request to the visited dispatching server; sending, by the visited dispatching server, the trunked connection request to the roaming subscriber; returning, by the roaming subscriber, a dispatch call establishment message to the home dispatching server after a channel is established; sending, by the home dispatching server, a talk floor authorization message to the home trunked gateway after receiving the dispatch call establishment message; translating, by the home trunked gateway, the talk floor authorization message into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the talk floor authorization message; forwarding, by the visited trunked gateway, the talk floor authorization message to the visited dispatching server; sending, by the visited dispatching server, the talk floor authorization message to the roaming subscriber; beginning, by the roaming subscriber, a talk upon a call prompt being received; sending a voice stream message of the roaming subscriber to the home dispatching server via the visited dispatching server, the visited trunked gateway, and the home trunked gateway, and distributing, by the home dispatching server, the voice stream message to other subscribers of the dispatch call. 3. The roaming method for the digital trunked communication network of claim 2, wherein authenticating, by the home dispatching server, the roaming subscriber again after receiving the dispatch call request; returning, by the home dispatching home register, the authentication response to the home dispatching server after authenticating and authorizing the roaming subscriber. 4. The roaming method for the digital trunked communication network according to claim 2, further comprising: when the roaming subscriber finishes talking, sending, by the roaming subscriber, a talk floor release message to the visited dispatching server; forwarding, by the visited dispatching server, the talk floor release message to the visited trunked gateway; translating, by the visited trunked gateway, the talk floor release message to the form of external signaling; routing, by the visited trunked gateway, the external signaling to the home trunked gateway; translating, by the home trunked gateway, the external signaling to the talk floor release message; forwarding, by the home trunked gateway, the talk floor release message to the home dispatching server; and the talk floor entering an idle state. 5. The roaming method for the digital trunked communication network according to claim 4, further comprising: when a subscriber who has the authority to end a call ends the dispatch call, or an idle duration of the dispatch call is time-out, determining, by the home dispatching server, if the subscriber ending the dispatch call is a roaming subscriber or a local subscriber, if the subscriber ending the dispatch call is a roaming subscriber: sending, by the home dispatching server, a dispatch call release message to the home trunked gateway; translating, by the home trunked gateway, the dispatch call release message into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the dispatch call release message; forwarding, by the visited trunked gateway, the dispatch call release message to the visited dispatching server; sending, by the visited dispatching server; the dispatch call release message to the roaming subscriber; and if the subscriber ending the dispatch call is a local subscriber, sending, by the home dispatching server, the dispatch call release message to the local subscriber directly; returning a dispatch call release completion message to the home dispatching server, after the dispatch call of the subscriber has been released. 6. A roaming method for a digital trunked communication network, comprising: originating, by a calling subscriber, a dispatch call; originating, by a home dispatching subsystem of the calling subscriber, a trunked connection request to one or more called subscribers; if at least one of the one or more called subscribers is a roaming subscriber, forwarding, by the home dispatching subsystem, the trunked connection request to a visited dispatching subsystem serving the roaming subscriber; receiving, by the home dispatching subsystem, a call establishment completion notification upon the call being established; and sending, by the home dispatching subsystem, a dispatch call authorization to the calling subscriber. 7. The roaming method for the digital trunked communication network of claim 6, wherein the visited dispatching subsystem comprises a visited dispatching server, a visited dispatching home register and a visited trunked gateway, and the home dispatching subsystem comprises a home dispatching server, a home dispatching home register and a home trunked gateway, the method further comprising: originating, by the called subscriber, a dispatch call request to the home dispatching server; sending, by the home dispatching server, an authentication request to the home dispatching home register; authenticating and authorizing, by the home dispatching home register, the calling subscriber; returning, by the home dispatching home register, an authentication response to the home dispatching server; determining, by the home dispatching server, if the called subscriber is a roaming subscriber or a local subscriber; if the called subscriber is a roaming subscriber, sending, by the home dispatching server, the trunked connection request to the home trunked gateway; translating, by the home trunked gateway, the trunked connection request into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the trunked connection request; forwarding, by the visited trunked gateway, the trunked connection request to the visited dispatching server; sending, by the visited dispatching server, the trunked connection request to the roaming subscriber; if the called subscriber is a local subscriber, sending, by the home dispatching server, the trunked connection request to the local subscriber directly; returning, by the called subscriber, a dispatch call establishment message to the home dispatching server after a channel has been established; sending, by the home dispatching server, a talk floor authorization message to the calling subscriber after knowing that the dispatch call has been established; beginning, by the calling subscriber, a talk upon the call prompt being received; sending the voice stream message of the calling subscriber to the home dispatching server; distributing, by the home dispatching server, the voice stream message to the called subscribers of the dispatch call, wherein, if the called subscriber is a roaming subscriber, sending the voice stream message to the roaming subscriber via the home trunked gateway, the visited trunked gateway, and the visited dispatching server. 8. The roaming method for the digital trunked communication network of claim 7, further comprising: sending a talk floor release message to the home dispatching server when the calling subscriber finishes talking; and the talk floor entering an idle state. 9. The roaming method for the digital trunked communication network of claim 8, further comprising: when a subscriber who has the authority to end a call ends the dispatch call, or the idle duration of the dispatch call is time-out, determining, by the home dispatching server, if the subscriber ending the dispatch call is a roaming subscriber or a local subscriber, if the subscriber ending the dispatch call is a roaming subscriber, sending the dispatch call release message to the home trunked gateway; translating, by the home trunked gateway, the call release message into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the dispatch call release message; forwarding, by the visited trunked gateway, the dispatch call release message to the visited dispatching server; sending, by the visited dispatching server, the dispatch call release message to the roaming subscriber, and if the subscriber ending the dispatch call is a local subscriber, sending the dispatch call release message to the local subscriber directly; returning a dispatch call release completion message to the home dispatching server, after the dispatch call has been released. 10. A roaming method for the digital trunked communication network, comprising: after a dispatch call has been established, originating, by a roaming subscriber, a registration request; forwarding, by a visited dispatching subsystem serving the roaming subscriber, the registration request to a home dispatching subsystem of the roaming subscriber; originating, by the home dispatching subsystem, a trunked connection request for the roaming subscriber to the visited dispatching subsystem when the home dispatching subsystem determines the dispatch call has been established while the roaming subscriber has not yet joined in the call; receiving, by the home dispatching subsystem, a call establishment completion notification when the call of the roaming subscriber is established; and adding, by the home dispatching subsystem, the roaming subscriber to the dispatch call. 11. The roaming method for the digital trunked communication network of claim 10, comprising: before the home dispatching subsystem originates the trunked connection request for the roaming subscriber, originating, by the roaming subscriber, a dispatch call request; and forwarding, by the visited dispatching subsystem, the dispatch call request to the home dispatching subsystem. 12. The roaming method for the digital trunked communication network of claim 10, wherein the visited dispatching subsystem comprises a visited dispatching server, a visited dispatching home register and a visited trunked gateway, and the home dispatching subsystem comprises a home dispatching server, a home dispatching home register and a home trunked gateway, the method comprising: originating, by a roaming subscriber, a registration request to the visited dispatching server; sending, by a visited dispatching server, the registration request to the visited dispatching home register; selecting, by the visited dispatching home register, a route according to the subscriber identification code information; sending, by the visited dispatching home register, the registration request to the home dispatching home register; renewing, by the home dispatching home register, the location of the roaming subscriber according to the registration request; returning, by the home dispatching home register, a registration response to the visited dispatching home register, wherein the response message carries an indication that the dispatch call has been established; returning, by the visited dispatching home register, the registration response to the visited dispatching server; returning, by the visited dispatching server, the registration response to the roaming subscriber; determining, by the visited dispatching server, that the roaming subscriber belongs to a certain activated dispatch call according to the indication in the registration response, conducting, by the visited dispatching server, routing according to subscriber identification code information; forwarding, by the visited dispatching server, the registration request to the home dispatching server; receiving, by the home dispatching server, the registration request; determining, by the home dispatching server, that the dispatch call has been established while the subscriber has not joined in the call; sending, by the home dispatching server, the trunked connection request to the home trunked gateway; translating, by the home trunked gateway, the trunked connection request into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the trunked connection request; forwarding, by the visited trunked gateway, the trunked connection request to the visited dispatching server; sending, by the visited dispatching server, the trunked connection request to the roaming subscriber; returning, by the roaming subscriber, a dispatch call establishment message to the home dispatching server after a channel has been established; and joining, by the roaming subscriber, in the dispatch call. 13. The roaming method for the digital trunked communication network of claim 11, wherein the visited dispatching subsystem comprises a visited dispatching server, a visited dispatching home register and a visited trunked gateway, and the home dispatching subsystem comprises a home dispatching server, a home dispatching home register and a home trunked gateway, the method comprising: originating, by the roaming subscriber, a dispatch call request to the visited dispatching server; sending, by the visited dispatching server, the authentication request to the visited dispatching home register; selecting, by the visited dispatching home register, a route according to subscriber identification code information; forwarding, by visited dispatching home register, the authentication request to a home dispatching home register; authenticating and authorizing, by the home dispatching home register, the roaming subscriber; returning, by the home dispatching home register, an authentication response to the visited dispatching home register; returning, by the visited dispatching home register, the authentication response to the visited dispatching server; forwarding, by the visited dispatching server, the dispatch call request to the visited trunked gateway according to the subscriber's home information returned by the authentication response; translating, by the visited trunked gateway, the dispatch call request into the form of external signaling; routing, by the visited trunked gateway, the external signaling to a home trunked gateway; translating, by the home trunked gateway, the external signaling into the dispatch call request; forwarding, by the home trunked gateway, the dispatch call request to the home dispatching server; determining, by the home dispatching server, that the call has been established, while the subscriber has not joined in the call; sending, by the home dispatching server, the trunked connection request to the home trunked gateway; translating, by the home trunked gateway, the trunked connection request into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the trunked connection request; forwarding, by the visited trunked gateway, the trunked connection request to the visited dispatching server; sending, by the visited dispatching server, the trunked connection request to the roaming subscriber; returning, by the roaming subscriber, a dispatch call establishment message to the home dispatching server after a channel has been established; and joining, by the roaming subscriber, in the call. 14. The roaming method for the digital trunked communication network of claim 13, wherein the home dispatching server authenticates the roaming subscriber again after receiving the dispatch call request; and the home dispatching home register returns the authentication response to the home dispatching server after authenticating and authorizing the roaming subscriber. 15. The roaming method for the digital trunked communication network according to claim 13, further comprising: if the dispatch call is in a state in which nobody talks, sending, by the home dispatching server, a dispatch call authorization to the calling subscriber via the visited dispatching server and a visited base station subsystem. 16. The roaming method for the digital trunked communication network of claim 10, wherein the visited dispatching subsystem comprises a visited dispatching server and a visited trunked gateway, and the home dispatching subsystem comprises a home dispatching server and a home trunked gateway, the method comprising:: sending, by the home dispatching server, the trunked connection request to the home trunked gateway; translating, by the home trunked gateway, the trunked connection request into the form of external signaling; routing, by the home trunked gateway, the external signaling to the visited trunked gateway; translating, by the visited trunked gateway, the external signaling into the trunked connection request; forwarding, by the visited trunked gateway, the trunked connection request to the visited dispatching server; sending, by the visited dispatching server, the trunked connection request to the roaming subscriber who has not joined in the call; returning, by the roaming subscriber, the dispatch call establishment message to the home dispatching server after a channel has been established; and joining, by the roaming subscriber, in the call. 17. The roaming method for the digital trunked communication network of claim 16, wherein the home dispatching subsystem sends the trunked connection request once or periodically. 18. A digital trunked communication network supporting roaming, comprising: at least two trunked communication systems, and each of the trunked communication systems comprises a base station subsystem and a dispatching subsystem, wherein the dispatching subsystems of different trunked communication systems are connected via an external network; wherein the base station subsystem is adapted to access various services of a terminal and to forward a trunked service to the dispatching subsystem; and the dispatching subsystem is adapted to control and manage the trunked service of the terminals in the service area thereof, wherein the dispatching subsystem comprises: a dispatching server, a dispatching home register, and a trunked gateway; wherein the dispatching server is adapted to control a dispatch call and manage a talk floor of the dispatch call; the dispatching home register is adapted to store registration information and location information of a trunked subscriber and/or a group of trunked subscribers; and the trunked gateway is adapted to connect the external network. 19. The digital trunked communication network supporting roaming of claim 18, wherein, the trunked gateway is divided into a trunked signaling gateway and a trunked media gateway, wherein the trunked signaling gateway is responsible for interacting and converting a signaling as well as controlling the trunked media gateway; and the trunked media gateway is responsible for converting and transmitting a media stream. 20. The digital trunked communication network supporting roaming of claim 19, wherein, the peripheral interface of the trunked gateway uses a format which is consistent with the inner signaling and the media stream of the trunked system. 21. The digital trunked communication network which supports roaming of claim 19, wherein the peripheral interface of the trunked gateway uses SIP/RTP interface in the NGN network. 22. The digital trunked communication network supporting roaming of claim 18, wherein if the dispatching home registers in the two trunked communication systems cannot communicate with each other directly, messages will be forwarded by an agent dispatching home register in an intermediate trunked communication system. 23. The digital trunked communication network supporting roaming of claim 18, wherein if the trunked gateways in the two trunked communication systems cannot communicate with each other directly, messages will be forwarded by an agent trunked gateway in an intermediate trunked communication system. 24. The digital trunked communication network supporting roaming of claim 18, further comprising: an exchange subsystem, and/or a packet data subsystem, and/or a short message subsystem, and/or an intelligent network subsystem, and/or a positioning subsystem to achieve other services for the terminals.
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