WO2010130092A1 - 一种实现无线ip多媒体通信的方法及系统 - Google Patents

一种实现无线ip多媒体通信的方法及系统 Download PDF

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Publication number
WO2010130092A1
WO2010130092A1 PCT/CN2009/071784 CN2009071784W WO2010130092A1 WO 2010130092 A1 WO2010130092 A1 WO 2010130092A1 CN 2009071784 W CN2009071784 W CN 2009071784W WO 2010130092 A1 WO2010130092 A1 WO 2010130092A1
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WIPO (PCT)
Prior art keywords
base station
home base
address
ims domain
gateway
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PCT/CN2009/071784
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English (en)
French (fr)
Inventor
吴晓波
温立
刘海
靳维生
朱文若
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2009/071784 priority Critical patent/WO2010130092A1/zh
Priority to CN200980158298.6A priority patent/CN102369709B/zh
Publication of WO2010130092A1 publication Critical patent/WO2010130092A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and system for implementing wireless IP multimedia IMS communication. Background technique
  • HNB Home Node B
  • Home Node B is an ultra-compact mobile base station that has been introduced in recent years in response to the development of mobile communications and its broadbandization. Such base stations are usually placed in indoor places (such as homes, offices, bars, coffee houses, etc.).
  • the IP protocol can be used to connect through broadband circuits such as Asymmetric Digital Subscriber Line (ADSL) and Local Area Network (LAN), and the remote end is connected by the dedicated gateway from the Internet to the mobile network.
  • ADSL Asymmetric Digital Subscriber Line
  • LAN Local Area Network
  • HNB has the characteristics of convenient installation, automatic configuration, and plug-and-play. It can be applied to products with multiple standards.
  • Mobile terminals such as mobile phones support other mobile base station standards and frequency bands, so they are universal.
  • UE User Equipment
  • licensed spectrum such as UTRAN (UMTS Terrestrial Radio Access Network) / E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) through the home wireless access point HNB , Evolved UMTS Terrestrial Radio Access Network ) /CDMA (Code Division Multiple Access) AVimax (Worldwide Interoperability for Microwave Access/WLAN (Wireless Local Area Network, Wireless Local Area Network/HRPD) High Rate Packet Data)
  • a common IP access network eg, Digital Subscriber Line (DSL), Cable Broadband
  • the HNB GW may transparently transmit the bearer setup command to the HNB, so that the bearer is directly established from the HNB to the network, such as a media gateway (MGW, Media GateWay); the HNB GW may also parse the bearer setup command and establish From the HNB GW to the network, then the HNB GW commands the HNB to establish the bearer, and the HNB establishes the bearer with the HNB GW.
  • a user agent (User Agent) is deployed on the HNB, and the UA is used to proxy the UE to perform operations in an IP Multimedia System (IMS) domain, such as IMS registration, initiating an IMS call, and terminating an IMS call.
  • IMS IP Multimedia System
  • the UA proxy UE on the HNB performs IMS registration.
  • the enhanced MSC server MSC server enhanced for ICS registers with the IMS as the UA proxy UE.
  • the IMS When the UE attaches to the HNB, the IMS registers for the IMS instead of the UE, and the IMS network stores the address of the HNB, and the UE is considered to be able to find the UE through the HNB.
  • the UE performs cell reselection in the idle state and attaches to the macro base station if the location area does not change, when the IMS network has a message to be sent to the UE, since the HNB address is recorded in the IMS network, the message is sent to the HNB. In fact, the UE has already attached to the macro base station, causing the UE not to be found by the network.
  • the prior art also provides a method for configuring the location area of the HNB and the macro base station to be inconsistent, so that the UE initiates a location update when performing cell reselection between the HNB and the macro base station, and then the location initiated from the HNB.
  • the update causes the HNB to initiate registration with the IMS.
  • the location update initiated by the macro base station causes the MSC server to initiate registration with the IMS. This avoids the UE unreachability problem, but causes a large number of location update messages to impact the network.
  • HNB needs to have some functions and user agent functions of the MSC server, which may cause HNB to be too complicated and costly. Summary of the invention
  • Embodiments of the present invention provide a method and system for implementing IMS multimedia communication, which can transfer a circuit domain voice call to an IMS domain, which reduces HNB complexity and cost, and maintains voice continuity when the UE performs handover.
  • a method for implementing wireless multimedia communication includes: notifying an address and a port provided by a home base station or a home base station gateway to an address and a port provided by a communication peer end of the IMS domain, and providing the IMS domain communication peer end Notifying the home base station or the home base station gateway of the address and port;
  • a bearer is directly established between the home base station or the home base station gateway and the IMS domain communication peer.
  • a method for implementing UE handover includes: Receiving a handover request message sent by the macro base station;
  • the address and port provided by the home base station or the home base station gateway are notified to the IMS domain communication peer for media plane information update.
  • a communication system for implementing a wireless IMS includes: a control plane subsystem, including an MSC server having a user agent, configured to notify an IMS domain of an address and a port provided by a home base station or a home base station gateway; The provided address and port notify the home base station or the home base station gateway; if the service data stream is sent from the home base station gateway, the MSC server controls the home base station gateway to establish a bearer;
  • a control plane subsystem including an MSC server having a user agent, configured to notify an IMS domain of an address and a port provided by a home base station or a home base station gateway; The provided address and port notify the home base station or the home base station gateway; if the service data stream is sent from the home base station gateway, the MSC server controls the home base station gateway to establish a bearer;
  • the user plane subsystem directly establishes an IP bearer between the home base station or the home base station gateway and the IMS domain; the UE connects to the Internet from the home base station or the home base station gateway.
  • the control plane subsystem the MSC server with the user agent, is used to notify the IMS domain of the address and port provided by the home base station gateway; the home base station gateway is notified of the address and port provided by the IMS domain; and the MSC server uses the home base station gateway as the media gateway. Controlling the home base station gateway to establish a bearer;
  • the user plane subsystem directly establishes a bearer between the home base station or the home base station gateway and the IMS domain; the UE connects to the Internet from the home base station or the home base station gateway.
  • the embodiment of the present invention further provides an apparatus for implementing wireless IMS communication, where the apparatus includes: a receiving unit, configured to receive a request message of an IMS domain communication peer calling UE, where the request message includes an address and a port of the IMS domain communication peer end;
  • control unit configured to instruct the home base station to provide an address and a port, and notify the home base station to establish a connection by using an address and a port of the IMS domain communication peer end;
  • An apparatus for implementing wireless IMS communication includes: a response unit, receiving and responding to a call request initiated by a UE, instructing a home base station or a home base station gateway to perform bearer assignment, and receiving the home base station or the home The 7-load assignment response of the address and port provided by the base station gateway;
  • the call processing unit initiates a call request to the IMS domain communication peer end, and the call request carries an address and a port provided by the home base station or the home base station gateway, and receives an address and a port provided by the IMS domain communication peer end;
  • the sending unit sends the address and port provided by the IMS domain communication peer to the home base station or the home base station gateway.
  • the device for implementing wireless IMS communication includes: a receiving unit, receiving a handover request message sent by a macro base station;
  • the response unit receives a handover response message of the target home base station, where the message includes an address and a port provided by the home base station;
  • the notification unit is configured to notify the IMS domain communication peer of the address and port provided by the home base station.
  • a method for implementing wireless multimedia communication according to an embodiment of the present invention includes: determining, when using a codec, a media gateway as a codec, and establishing a bearer by the media gateway;
  • the address and port provided by the home base station or the home base station gateway are notified to the IMS domain communication peer end; and the address and port provided by the IMS domain communication peer end are notified to the home base station or the home.
  • the base station gateway directly establishes a bearer between the home base station or the home base station gateway and the IMS domain communication peer end.
  • circuit domain voice call can be transferred to the IMS domain without the need to integrate the UA on each HNB as in the prior art, which reduces the HNB complexity and cost; and maintains communication continuity when the UE performs handover.
  • FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of another communication system in an embodiment of the present invention.
  • Embodiment 3 is a flow chart of a call provided in Embodiment 1 of the present invention.
  • FIG. 5 is a flow chart of a call provided in Embodiment 1 of the present invention.
  • FIG. 6 is a flow chart of a call provided in Embodiment 2 of the present invention.
  • Embodiment 8 is a flowchart of a handover process provided in Embodiment 2 of the present invention.
  • Embodiment 9 is a flowchart of a handover process provided in Embodiment 3 of the present invention.
  • FIG. 10 is a flowchart of a handover process according to Embodiment 3 of the present invention.
  • FIG. 11 is a flowchart of a handover process provided in Embodiment 3 of the present invention.
  • FIG. 12 is a flowchart of a handover process according to Embodiment 3 of the present invention.
  • FIG. 13 is a schematic diagram of an apparatus for implementing IMS communication according to an embodiment of the present invention
  • FIG. 14 is a schematic diagram of another apparatus for implementing IMS communication according to an embodiment of the present invention
  • FIG. Schematic diagram of IMS communication
  • the embodiment of the present invention provides a method for implementing the HNB from the home base station.
  • the IMS voice service method when the UE is attached to the home base station HNB, allows the user data stream of the UE to be directly routed from the home base station HNB or the home base station gateway HNB GW to the destination entity, without going through the mobile core network, reducing resources to the mobile core network. Consumption, and also reduce user fees, so that the control plane signaling of the UE still passes through the mobile core network, avoiding the problem that the HNB is too complicated and the signaling load is too large.
  • the home base station or the home base station gateway is provided Notifying the IMS domain of the address and port; notifying the home base station or the home base station gateway of the address and port provided by the IMS domain; establishing a bearer directly between the home base station or the home base station gateway and the IMS domain, and subsequently if the IMS domain communicates with the peer media plane Updated, the MSC server server notifies the HNB or HNB GW.
  • the MSC server uses the home base station gateway as the base station controller RNC, and controls it to establish a bearer through the Iu-CS interface.
  • the MSC server uses the home base station gateway as a medium.
  • the gateway MGW controls it to establish a bearer through the Mc interface.
  • the control plane accesses the IMS via the MSC server, and the user plane directly routes from the HNB or HNB GW to the destination entity, and the user plane bypasses the mobile core network, that is, the media stream is directly routed from the HNB to the IMS domain communication pair. End, avoiding the mobile core network.
  • the MSC server receives and responds to the request message from the IMS domain calling UE and pages the UE, and the message includes media plane information of the IMS domain, which is also called Session Description Protocol (SDP).
  • SDP Session Description Protocol
  • the so-called sending of the message to the HNB means that the message passes through the HNB GW, but the HNB GW only transmits the packet to the HNB;
  • the message to the HNB GW means that the message passes through the HNB GW, and it processes the message and establishes a bearer to the media gateway, and then it sends a bearer message to the HNB to establish a bearer to the HNB.
  • the address and port in the media plane information SDP of the IMS domain establish a bearer; the HNB or HNB GW allocates an address and a port and sends a bearer setup response message to the MSC server, and the MSC server communicates with the IMS domain by using an address and port assigned by the HNB or HNB GW.
  • the peer negotiates the bearer to establish a call. Subsequently, if the IMS domain communication peer media plane has been updated, the MSC server notifies the HNB or the HNB GW.
  • the MSC server uses the HNB GW as the MGW, sends the address and port of the IMS domain communication peer to the HNB GW, and allows the HNB GW to prepare the bearer.
  • the HNB GW provides the address and port, and the MSC server negotiates the media with the peer. surface.
  • the MSC server When the UE makes a call, the MSC server first initiates a call to the IMS domain communication peer with an empty address and port. After the IMS domain communication peer responds to the media information, it sends a message to the HNB or HNB GW through the bearer assignment message, and the HNB or HNB GW responds. With its own address and port, the MSC server initiates an update to the IMS domain communication peer to complete the bearer negotiation. When the UE is calling, it can also The MSC server uses the HNB GW as the media gateway and allows the HNB GW to prepare the bearer. Then, the address and port provided by the HNB GW are used as the bearer to initiate a call to the IMS domain communication peer. After the IMS domain communication peer responds to the media information, the MSC server will IMS. The address and port of the domain communication peer tell the HNB GW.
  • the MSC server When the UE switches from the macro base station to the HNB, the MSC server carries the IMS domain communication peer to the HNB or HNB GW in the handover request message (requires the MSC server to save the address and port of the IMS domain communication peer), and the HNB or HNB GW returns the assigned address. And the port, the MSC server uses this address and port to update the bearer of the IMS domain communication peer. Or, when the UE switches from the macro base station to the HNB, the MSC server uses the HNB GW as the MGW and prepares the HNB GW to carry the bearer. The MSC server uses the address and the port to perform media plane update on the IMS domain communication peer; the UE switches from the HNB to the macro base station.
  • the MGW When the MSC server selects an MGW, the MGW prepares the bearer, and the MGW provides the address and port.
  • the MSC server uses this to perform media plane update with the IMS domain communication peer; the MSC server allows the MGW to prepare another bearer, and the MGW provides the address and port, and switches.
  • the request message carries this address and port to the HNB or HNB GW, and the HNB or HNB GW returns the assigned address and port.
  • the circuit domain voice call can be transferred to the IMS domain without the need to integrate the UA on each HNB as in the prior art, which reduces the HNB complexity and cost; and maintains the communication continuity when the UE performs the handover.
  • the communication system architecture in the embodiment of the present invention is as shown in FIG. 1.
  • the system for implementing wireless IMS communication provided by this embodiment includes:
  • the control plane subsystem includes an MSC server with a user agent function, and is used to notify the IMS domain of the address and port provided by the home base station or the home base station gateway; and notify the home base station of the address and port provided by the IMS domain. Or a home base station gateway;
  • the user plane subsystem directly establishes a bearer between the home base station or the home base station gateway and the IMS domain; on the user plane, the UE connects to the Internet from the home base station or the home base station gateway, bypassing the mobile core network.
  • the enhanced MSC server in this system has UA functions, while the HNB does not have UA functions.
  • the UE is attached to the HNB or the macro base station, and can be registered with the IMS network through the enhanced MSC server. If the UE performs cell reselection, the signaling message from the IMS domain can also be sent to the enhanced MSC server.
  • the server can page to the UE.
  • Architecture II
  • a communication system for implementing IMS voice includes:
  • the control plane subsystem includes an MSC server having a user agent function, configured to notify the IMS domain of the address and port provided by the home base station gateway; and notify the home base station gateway of the address and port provided by the IMS domain;
  • the server uses the home base station gateway as a media gateway, and controls it to establish a bearer through the Mc interface.
  • the user plane subsystem directly establishes a bearer between the home base station gateway and the IMS domain; the UE exits the user plane interface from the home base station gateway to the Internet, bypassing the mobile core network.
  • the enhanced MSC server in this system has the UA function, and the HNB may not have the UA function.
  • the UE is attached to the HNB or the macro base station, and can be registered with the IMS network through the enhanced MSC server. If the UE performs cell reselection, the signaling message from the IMS domain can also be sent to the enhanced MSC server. The server can page to the UE.
  • Described in this embodiment is an implementation flow under the above two architectures in the case where the UE is the called UE.
  • the enhanced MSC server When a signaling message from the IMS arrives at the enhanced MSC server, the enhanced MSC server initiates paging to both the macro base station and the HNB. If the UE answers from the macro base station, the MSC server selects an MGW to establish a call and uses the media provided by the MGW. Carry out bearer negotiation. If the UE receives the response, the MSC server carries the media plane address and port in the message such as the INVITE from the IMS in the bearer assignment message as the media plane of the bearer, and the HNB or HNB GW allocates the corresponding media plane address and port, and then The address and port are provided to the MSC server as media face addresses.
  • the corresponding address and port refer to the address and port that can communicate with the IMS domain to communicate with the peer address and port.
  • the IMS domain communication peer provides the public network address and port
  • the HNB Or the HNB GW provides a public network address and port.
  • the IMS domain communication peer provides a private network address and port
  • the HNB or HNB GW provides a private network address and port.
  • the assignment of the corresponding media plane address and port by the HNB or HNB GW in the following embodiments is also the same.
  • the MSC server negotiates the media plane with the IMS domain communication peer using the media plane address. Or if the UE answers from the HNB, the MSC server selects the HNB GW as the MGW to establish the bearer and performs bearer negotiation with the media plane provided by the MGW.
  • the following describes an embodiment of a situation in which the UE is used as the called UE and the HNB is routed to the IMS domain communication peer when the UE is attached to the HNB.
  • the call flow in this embodiment includes the following steps:
  • the MSC server server pages the UE on the macro base station and the HNB in the location area registered by the UE.
  • the UE attached to the HNB responds to the paging message.
  • the MSC server server sends a call setup se tup message to the UE, and the UE responds to the call confirmation to the MSC server server. They can negotiate bearer parameters during this process;
  • the MSC server sends a bearer assignment message to the HNB, and the media plane of the assigned bearer uses the media plane information in the SDP in S101.
  • the HNB determines that the media plane address in the bearer assignment is a public network address, and the HNB also provides a certain public network address and port as the corresponding media plane, and then the HNB sends a bearer assignment command message to the UE.
  • the UE establishes a radio bearer, and returns a bearer assignment completion message to the HNB.
  • the HNB responds to the bearer assignment completion message to the MSC server server, where the bearer assignment complete message includes the media plane information provided in step S106.
  • the MSC server server notifies the IMS domain communication peer IMS domain of the address and port provided by the home base station, and negotiates the address and port with the IMS domain communication peer.
  • the call is established, and the media stream is directly routed from the HNB to the IMS domain communication peer, avoiding the mobile core network.
  • the UE as the called party is attached to the HNB, and is directly routed by the HNB GW to
  • the situation of the IMS domain communication peer is the same as the case where the called UE is attached to the HNB, and the HNB directly routes to the IMS domain communication peer.
  • the difference is that the former case is allocated the media plane information by the HNB GW, including the address and port.
  • the media stream is directly routed from the HNB GW to the IMS domain communication peer.
  • steps S201-S204 of the call flow in this embodiment are the same as steps S101-S104;
  • the MSC server server initiates a bearer assignment. Using information such as an IP address and port in the provided SDP from the IMS domain communication peer as the bearer information;
  • the HNB GW allocates an address and a port.
  • the HNB GW initiates a bearer assignment, sends an assignment command to the UE, and establishes a bearer by using the allocated address and port.
  • the HNB performs a 7-load establishment with the UE, and the UE returns an assignment completion message to the HNB.
  • the HNB allocates an address and a port, and sends a bearer assignment response message to the HNB GW, and establishes 7 bearers by using the address and the port;
  • the HNB GW allocates an address and a port, and sends a bearer assignment response message to the MSC server server, and uses the address and the port as the information;
  • the MSC server server notifies the IMS domain communication peer end of the address and port provided by the HNB GW, and performs address and port negotiation with the IMS domain communication peer end. After the call is established, the media stream is directly routed to the calling peer end.
  • This embodiment is specifically described based on the system architecture 2, and is a case where the called UE is attached to the HNB and directly routed by the HNB GW to the IMS domain communication peer.
  • the call flow in this embodiment includes the following steps:
  • S301-S304 are the same as S101-S104 of the first embodiment
  • the MSC server server selects the HNB GW as the MGW, and commands the HNB GW to establish a bearer, and sends an add command to the HNB GW, where the HNB GW returns the address and the port.
  • the MSC server server sends a bearer assignment message to the HNB, and the media plane of the assigned bearer uses the address and port provided by the HNB GW in the S305.
  • the HNB allocates a corresponding address and port, and then the HNB sends a bearer assignment command message to the UE;
  • the UE establishes a radio bearer, and sends an assignment completion message to the HNB. 5309.
  • the HNB responds to the bearer assignment completion message to the MSC server server, and includes the address and port allocated in step S307.
  • the MSC server server notifies the IMS domain communication peer end of the address and the port, and performs media plane information negotiation with the IMS domain communication peer end.
  • the call is established, and the media stream can be directly routed from the HNB to the IMS domain communication peer, avoiding the mobile core network.
  • the other process in this paper that involves architecture 2 can refer to this process.
  • the MSC server server when paging the UE from the IMS domain, the MSC server server performs paging on both the macro base station and the HNB, and the UE answers the paging from the HNB, and the MSC server server does not select during the subsequent call setup process.
  • the MGW sends the address and port of the IMS domain communication peer to the HNB or HNB GW.
  • the HNB or HNB GW responds to its own address and port.
  • the MSC server sends the address and port provided by the HNB or HNB GW to the IMS domain communication peer. , complete media information consultation.
  • the user data stream of the UE is directly routed from the HNB or the HNB GW to the destination entity, that is, the media stream is directly routed from the HNB to the IMS domain communication peer, avoiding the mobile core network.
  • the following describes the implementation process in the case where the UE is attached to the HNB, and the UE is the called UE, and the codec needs to be inserted.
  • the voice codec (Transcoder) needs to be set.
  • the media gateway MGW is introduced into the system to implement voice coding by using the MGW. Decoder function.
  • the call flow provided in this embodiment includes the following steps:
  • Steps S401-S404 are the same as steps S101-S104 in the first embodiment, and are not repeated here;
  • the MSC server sends an add bearer message to the MGW, and the MGW sends an add bearer response message to the MSC server, and responds to the established address and port.
  • the MSC server sends a bearer assignment command to the HNB, and carries the address and port provided by the MGW.
  • the HNB sends the bearer assignment command information to the UE. After the UE completes the assignment, the HNB responds to the MSC server server assignment completion information.
  • the MSC server server notifies the IMS domain communication peer IMS domain of the address and port provided by the MGW, and performs media plane negotiation of the address and the port with the IMS domain communication peer end.
  • the call is established, and the media stream is routed to the IMS domain communication peer through the mobile core network, and the MGW completes the codec conversion.
  • the UE attached to the HNB is called, and the MSC server server subsequently notifies the HNB to update the media plane.
  • the call process includes the following steps:
  • the UE initiates a call request.
  • the MSC server server responds and performs call processing.
  • the MSC server server performs bearer assignment, does not carry an address and a port, or constructs an address and a port, such as an all-zero address and an all-zero port or an arbitrary port;
  • the HNB sends an assignment command to the UE, and instructs the UE to perform bearer establishment.
  • S505 The UE sends the assignment completion information to the HNB.
  • the HNB sends a bearer assignment response to the MSC server, where the message carries the address and the port, or the HNB GW learns that the UE completes the bearer assignment, and sends a bearer assignment response to the MSC server, where the message carries the address and the port. ;
  • the MSC server server initiates a call request to the IMS domain, and uses the address and port provided by the HNB or the HNB GW to perform media plane information negotiation.
  • the MSC server server initiates a bearer modification, and sends bearer assignment information to the HNB, where the information includes an address and a port provided by the peer end.
  • the HNB sends a bearer assignment response message to the MSC server server, or the HNB GW learns that the MSC server server initiates the bearer modification, and sends a bearer assignment response message to the MSC server server.
  • the S503-S510 may be replaced by: the MSC server server uses the HNB GW as the media gateway, and allows the HNB GW to prepare the bearer, and uses the bearer to communicate with the IMS domain.
  • the opposite side negotiates the media side.
  • the UE attached to the HNB is called, and the MSC server server notifies the IMS domain communication peer to update the media plane.
  • the call process includes the following steps:
  • the UE initiates a call request.
  • the MSC server server responds and performs call processing.
  • the MSC server server initiates a call request (inv i te) to the IMS domain, and the provided address and port are empty.
  • the MSC server server performs media plane negotiation with the IMS domain communication peer end, and the IMS domain communication peer end provides its address and port.
  • the MSC server server initiates a bearer assignment request, where the request message includes an address and a port provided by the IMS domain communication peer end.
  • the HNB sends a bearer assignment command to the UE.
  • the UE establishes a bearer, and sends the assignment completion information to the HNB.
  • the 5608, the HNB, or the HNB GW allocates a corresponding address and port, and responds to the bearer assignment response message to the MSC server server, where the assignment response message includes the allocated address and port;
  • the MSC server server informs the IMS domain communication peer end of the media plane update by using the address and port assigned by the HNB or the HNB GW.
  • the MSC server server selects the HNB GW as the MGW, and allows the HNB GW to provide a bearer, and uses this to initiate a call to the IMS domain communication peer.
  • the MSC server server when the UE makes a call request by the calling party, the MSC server server first initiates a call to the IMS domain communication peer with an empty bearer address and port, and the IMS domain communication peer responds to the media. After the information is sent to the HNB or HNB GW through the bearer assignment message, the HNB or the HNB GW responds to its own address and port. The MSC server uses this address to initiate an update to the IMS domain communication peer to complete the SDP negotiation. There is no need to integrate UA on each HNB as in the prior art, which reduces HNB complexity and cost.
  • This embodiment provides a processing flow when a UE performs handover.
  • the UE handover procedure in this embodiment includes the following steps: 5701.
  • the HNB decides to initiate a handover to the macro base station.
  • HNB sends a relocation request re loca t ion requi red to the MSC server server ;
  • the MSC server server determines to switch to the macro base station, and the MSC server server selects an MGW, and the MSC server server commands the MGW to establish a bearer.
  • the MSC server sends an add reques request message to the MGW, and the MGW prepares to bear and responds with an add response to provide an address and a port.
  • the MSC server server sends a relocation request message to the macro base station, and establishes 7 addresses by using the address and port provided by the MGW;
  • the macro base station responds to the relocation response, and includes the allocated address and port, and is completed with the MGW.
  • the MSC server sends a handover command to the HNB.
  • the HNB sends a handover command to the UE.
  • the UE accesses the target macro base station, and the target macro base station sends a handover complete message to the MSC server server;
  • the MSC server sends an add bearer indication to the MGW, and the MGW sends an add bearer response to the MSC server to provide an address and a port.
  • the MSC server sends the bearer information including the address and the port provided by the MGW to the IMS domain communication peer to initiate media plane update or renegotiation.
  • the media plane update or renegotiation includes the address and port provided in S708, so as to update the pair. End media information.
  • steps S708 and S709 may also be advanced to any step after step S701.
  • the UE handover process in this embodiment includes the following steps:
  • the macro base station initiates a handover request, and sends a relocation request to the MSC server server.
  • the MSC server sends a relocation request to the HNB, where the carried address and port are addresses provided by the IMS domain communication peer end stored in the MSC server server. And port;
  • the 5803, the HNB, or the HNB GW allocates a corresponding address and port, and sends a relocation request acknowledgement message to the MSC server server, including the allocated address and port;
  • the MSC server sends a handover command to the macro base station, and the macro base station is commanded. Switching;
  • S805 The macro base station sends a handover command to the UE.
  • the UE accesses the target HNB, and the HNB sends a handover complete message to the MSC server server.
  • the MSC server server notifies the IMS domain communication peer end of the address and port provided by the HNB or the HNB GW, and updates the media plane information of the IMSi or the communication peer by using the address and port provided by the HNB or the HNB GW.
  • step S807 may start at any step after step S803.
  • the S802-S807 step in this embodiment may be replaced by: the MSC server server uses the HNB GW as the MGW, commands the HNB GW to prepare the bearer, and then notifies the IMS i or the communication peer with the address and port provided by the HNB GW, and uses the HNB or HNB GW.
  • the provided address and port update the media plane information of the IMS domain communication peer.
  • the process of establishing a bearer on the HNB is the same as the existing handover procedure.
  • the UE switches from the HNB to the macro base station and the MSC server server changes.
  • the UE handover process in this embodiment includes the following steps:
  • the HNB initiates a relocation request to the MSC server server.
  • the MSC server server After the MSC server server determines that the UE needs to enter another MSC, the MSC server server selects an MGW, such as MGW1, and sends an MGW request to the MGW1, and the MGW1 adds a bearer, and the MGW1 returns an MGW response.
  • MGW such as MGW1
  • the MSC server server selects the target MSC server server, and sends a handover preparation message.
  • the target MSC server server selects an MGW, such as MGW2, and sends an MGW request to the MGW2, and adds a 7-load, and the MGW2 returns an MGW response to provide an address and a port.
  • MGW Mobility Management Entity
  • the target MSC server sends a relocation request message to the target macro base station, where the address and port provided by step S904MGW2 are included.
  • the macro base station returns a relocation request acknowledgement information to the target MSC server server.
  • the target MSC server sends the add bearer request information to the MGW2, instructing the MGW2 to add a load, and the MGW2 returns the add-on response information.
  • the target MSC server sends a preparation switch response to the source MSC server, and carries the bearer information added by the MGW in step S907, where the bearer information includes an address and a port;
  • the source MSC server sends a relocation command to the HNB, and the HNB sends a relocation command to the UE, and provides an address and a port.
  • the source MSC server sends a bearer modification request message to the MGW1, and notifies the MGW1 of the address and port obtained in step S909, and the MGW1 establishes a bearer according to the address and the port.
  • MGW1 responds to the source MSC server server with a bearer modification response;
  • the UE accesses the target macro base station, and the macro base station sends the handover completion information to the target MSC server server.
  • the target MSC server sends a handover complete message to the source MSC server server.
  • Source MSC server server command MGW1 establishes a bearer and provides corresponding address and port;
  • the source MSC server server notifies the IMS domain communication peer to the address and port, and uses the address and port to update the media plane of the IMS or the communication peer.
  • steps S91 3 and S914 may be executed at any step after step S901.
  • the UE handover process in this embodiment includes the following steps:
  • the S100 macro base station initiates a relocation request
  • the source MSC server determines that the user media data stream needs to be sent to the IMS domain communication peer end, and sends a preparation handover indication to the target MSC server server, where the media surface information of the IMS or the communication peer end is included;
  • the target MSC server sends a relocation request to the HNB, where the relocation request carries the media plane information of the IMS domain communication peer end;
  • HNB or HNB GW prepares the bearer, and responds to the relocation request acknowledgement to the target MSC server server, which includes the provided address and port;
  • the target MSC server sends a handover preparation indication message response to the source MSC.
  • the preparation indication message includes the address and port of the HNB;
  • the source MSC server sends a handover command to the macro base station, and commands the macro base station to switch.
  • the macro base station sends a handover command to the UE.
  • the HNB after the UE accesses the HNB, the HNB sends the handover completion information to the target MSC server server;
  • the source MSC server server notifies the IMS domain communication peer end to the address and port provided by the HNB or the HNB GW, and updates the media side of the IMS domain communication peer end.
  • step S101 0 may be started at any step after S1005.
  • the MSC server server selects the HNB GW as the MGW, and instructs the HNB GW to establish a bearer, and uses this to update the IMS domain communication peer media plane.
  • an apparatus 1 30 for implementing wireless IMS communication includes:
  • the receiving unit 131 is configured to receive a request message of the IMS domain calling UE, where the request message includes an address and a port of the IMS domain;
  • the control unit 132 is configured to instruct the HNB to provide an address and a port, and notify the HNB to establish a connection by using the address and port of the IMS domain as bearer information.
  • the sending unit 133 is configured to notify the IMS i or the communication peer IMS domain of the address and port provided by the HNB.
  • another apparatus 140 for implementing wireless IMS communication includes:
  • the response unit 141 receives and responds to the call request initiated by the UE of the local end, instructs the HNB or the HNB GW to perform bearer assignment, and provides an address and a port;
  • the call processing unit 142 sends a call request to the IMS domain communication peer end, and carries the address and port provided by the local HNB or HNB GW, and receives the address and port provided by the IMS domain communication peer end;
  • the sending unit 143 sends the address and port provided by the IMS i or the communication peer to the HNB or the HNB GW.
  • another apparatus 150 for implementing IMS communication includes:
  • the receiving unit 151 is configured to receive a handover request message sent by the macro base station;
  • the sending unit 152 sends the handover request message to the target HNB, where the request includes an address and a port;
  • the response unit 153 receives a handover response message of the target HNB, where the message includes an address and a port allocated by the HNB;
  • the notification unit 154 is configured to notify the IMS domain communication peer of the media face update by using the address and port assigned by the HNB.
  • the technical solution provided by the embodiment of the present invention receives and responds to a request message from the IMS domain to the UE and pages the UE, where the message includes the media plane information SDP of the IMS domain; and the user equipment UE attached to the HNB
  • the bearer is sent to the HNB, and the media plane information SDP of the IMS domain is used as the bearer information; and the media plane is negotiated with the IMS domain by using the address and port allocated by the local end to establish a call.
  • the control plane goes to the MSC server, and the user plane directly routes from the HNB to the destination entity, bypassing the mobile core network.
  • the MSC server When paging the UE, the MSC server performs paging on both the macro base station and the HNB. If the UE answers the page from the HNB, the MSC server sends the bearer information of the IMS domain communication peer to the HNB in the subsequent call setup process, and the HNB responds. The MSC server notifies the IMS domain communication peer with the bearer provided by the HNB, and completes the SDP negotiation without selecting the MGW.
  • the MSC server When the UE is the calling party, the MSC server first initiates a call to the IMS domain communication peer with an empty bearer address. After the IMS domain communication peer responds to the media information, it sends a message to the HNB through the bearer assignment message, and the HNB responds to its own address and port.
  • the MSC server uses this address and port to initiate an update to the IMS domain communication peer to complete the SDP negotiation.
  • the MSC server does not select the MGW.
  • the handover reques t message carries the address and port of the IMS domain communication peer to the HNB.
  • the HNB returns its own media address, and the MSC server negotiates the SDP. In this way, when the cell is reselected, the UE is prevented from being unreachable, and the UA is not integrated on each HNB as in the prior art, which reduces the HNB complexity and cost; and maintains communication continuity when the UE performs handover.
  • the invention integrates the UA into the MSC server, which reduces the complexity of the HNB and is beneficial to reducing the cost.
  • the anchor for the IMS domain UE is always at the MSC server, avoiding that the UE cannot be paged.
  • a handover method between the HNB and the macro base station is provided, and the user plane after the handover is guaranteed to be optimized. It is easy to implement because there is no modification to the existing interface protocol.

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Description

一种实现无线 IP多媒体通信的方法及系统 技术领域
本发明涉及无线通信技术领域，具体涉及一种实现无线 IP多媒体 IMS 通信的方法及系统。 背景技术
家庭基站 ( HNB, Home Node B )是近年来顺应移动通信发展及其宽 带化趋势推出的超小型化移动基站， 这种基站通常安放在室内场所（如 家庭、 办公室、 酒吧、 咖啡屋等）， 可使用 IP协议， 通过用户已有的不对 称数字用户线（ ADSL, Asymmetric Digital Subscriber Line)、局域网（ LAN, Local Area Network) 等宽带电路连接， 远端由专用网关实现从因特网到 移动网的联通。 HNB具有安装方便、 自动配置、 即插即用的特点， 可适 用于采用多种标准的产品， 手机等移动终端支持其它移动基站制式、 频 段， 因此具有通用性。
用户设备 ( UE, User Equipment )通过家庭无线接入点 HNB, 使用许 可的频谱（如 UTRAN ( UMTS陆地无线接入网， UMTS Terrestrial Radio Access Network ) /E-UTRAN (演进的 UMTS陆地无线接入网， Evolved UMTS Terrestrial Radio Access Network ) /CDMA (码分多址接入， Code Division Multiple Access ) AVimax (微波存取全球互通， Worldwide Interoperability for Microwave Access/WLAN (无线局域网 , Wireless Local Area Network/HRPD (高速分组数据， High Rate Packet Data) )等无线接入 网络使用的频谱）， 通过通用的 IP接入网络（如， 数字用户线 （DSL, Digital Subscriber Line )、 电缆宽带 （ Cable broadband ) )连接到运营商的 移动网络。
在承载建立过程中， HNB GW 可以不解析承载建立命令， 透传给 HNB, 这样承载就是从 HNB直接建立到网络， 比如媒体网关 （MGW, Media GateWay); HNB GW也可以解析承载建立命令， 建立从 HNB GW 到网络的 载，然后 HNB GW命令 HNB建立 载， HNB建立与 HNB GW 的承载。 现有技术中， 在 HNB上部署用户代理（User Agent ), UA用于代理 UE进行 IP多媒体系统（IMS, IP Multimedia Subsystem) 域的操作， 比 如 IMS注册， 发起 IMS呼叫和终止 IMS呼叫等。 当 UE附着在 HNB上 时， HNB上的 UA代理 UE进行 IMS注册。 当 UE附着在宏基站时， 增 强的 MSC服务器（ MSC server enhanced for ICS )作为 UA代理 UE向 IMS进行注册。
现有技术提供的方案对移动性支持不够。当 UE在 HNB附着时，ΗΝΒ 代替 UE进行 IMS注册， IMS网络存储 HNB的地址， 认为通过 HNB可 以寻找到该 UE。 当 UE在空闲态进行小区重选附着到宏基站时， 如果位 置区没变， 当 IMS网络有消息需要发送给 UE的时候， 由于在 IMS网络 记录的是 HNB地址， 所以会将消息发送给 HNB , 而实际上， UE已经附 着到了宏基站， 导致 UE不能被网络找到。 现有技术也提供了配置 HNB 和宏基站位置区不一致的方法， 这样 UE在 HNB和宏基站之间进行小区 重选的时候就会发起位置更新 ( location area update ), 那么从 HNB上发 起的位置更新会导致 HNB向 IMS发起注册，从宏基站发起的位置更新会 导致 MSC server向 IMS发起注册， 这样避免了 UE不可达问题， 但会导 致大量的位置更新消息冲击网络。 HNB由于需要具备 MSC server的部分 功能和用户代理功能会导致 HNB过于复杂和成本过高问题。 发明内容
本发明实施例提供一种实现 IMS多媒体通信的方法及系统，可以将电 路域语音呼叫转移到 IMS域， 降低了 HNB复杂度及成本， 并且在 UE进 行切换时可保持语音连续性。
本发明实施例提供的一种实现无线多媒体通信的方法， 包括： 将家庭基站或者家庭基站网关提供的地址和端口通知 IMS域通信对 端提供的地址和端口且将所述 IMS域通信对端提供的地址和端口通知所 述家庭基站或者家庭基站网关；
在所述家庭基站或者家庭基站网关与所述 IMS域通信对端之间直接 建立承载。
本发明实施例提供的一种实现 UE切换的方法， 包括： 接收宏基站发送的切换请求消息；
将所述切换请求消息发送给目标家庭基站， 并在该请求携带 IMS域 通信对端的地址和端口；
接收家庭基站的切换应答消息， 该消息包含家庭基站或者家庭基站 网关提供的地址和端口；
将家庭基站或者家庭基站网关提供的地址和端口通知 IMS域通信对 端， 以进行媒体面信息更新。
本发明实施例提供的一种实现无线 IMS的通信系统， 包括： 控制面子系统， 包括具有用户代理的 MSC服务器， 用于将家庭基站 或者家庭基站网关提供的地址和端口通知 IMS域； 将 IMS域提供的地址 和端口通知家庭基站或者家庭基站网关； 如果从家庭基站网关发送业务 数据流， MSC服务器控制家庭基站网关建立承载；
用户面子系统，在家庭基站或者家庭基站网关与 IMS域之间直接建立 IP承载； UE从家庭基站或家庭基站网关出用户面连接到因特网。
本发明实施例提供的另一种实现无线 IMS的通信系统， 包括控制面 子系统和用户面子系统：
所述控制面子系统， 具有用户代理的 MSC服务器， 用于将家庭基站 网关提供的地址和端口通知 IMS域； 将 IMS域提供的地址和端口通知家 庭基站网关； MSC服务器把家庭基站网关作为媒体网关控制家庭基站网 关建立承载；
所述用户面子系统，在家庭基站或者家庭基站网关与 IMS域之间直接 建立承载； UE从家庭基站或家庭基站网关出用户面连接到因特网。
本发明实施例还提供一种实现无线 IMS通信的装置， 该装置包括： 接收单元， 用于接收 IMS域通信对端呼叫 UE的请求消息， 该请求 消息包含 IMS域通信对端的地址和端口；
控制单元， 用于指示家庭基站提供地址和端口， 并通知家庭基站使 用所述 IMS域通信对端的地址和端口建立连接；
发送单元， 用于将家庭基站提供的地址和端口通知所述 IMS域通信 对端。 本发明实施例提供的另一种实现无线 IMS通信的装置， 包括： 响应单元，接收并响应 UE发起的呼叫请求，指示家庭基站或家庭基 站网关进行承载指配， 接收包括所述家庭基站或家庭基站网关提供的地 址和端口的 7 载指配响应；
呼叫处理单元， 向 IMS域通信对端发起呼叫请求， 所述呼叫请求携 带家庭基站或家庭基站网关提供的地址和端口， 接收 IMS域通信对端提 供的地址和端口；
发送单元， 将 IMS域通信对端提供的地址和端口发送给家庭基站或 者家庭基站网关。
本发明实施例提供的又一种实现无线 IMS通信的装置， 包括： 接收单元， 接收宏基站发送的切换请求消息；
发送单元， 将所述切换请求消息发送给目标家庭基站， 该请求包含 当前的地址和端口；
响应单元， 接收目标家庭基站的切换应答消息， 该消息包含家庭基 站提供的地址和端口；
通知单元， 用于将家庭基站提供的地址和端口通知 IMS域通信对端。 本发明实施例提供的一种实现无线多媒体通信的方法， 包括： 判断需要使用编解码器时， 将媒体网关作为编解码器， 并由所述媒 体网关建立承载；
将所述媒体网关提供的地址和端口发送给家庭基站， 以使得所述家 庭基站完成承载指配；
将所述媒体网关提供的地址和端口发送给 IMS域通信对端， 与所述 IMS域通信对端进行媒体面信息协商。
综上所述， 本发明实施例提供的技术方案中， 将家庭基站或者家庭 基站网关提供的地址和端口通知 IMS域通信对端； 将 IMS域通信对端提 供的地址和端口通知家庭基站或者家庭基站网关， 在家庭基站或者家庭 基站网关与 IMS域通信对端之间直接建立承载。 UE从宏基站切换到 HNB 时， 在切换请求消息里携带 IMS域通信对端的地址和端口给 HNB或者 HNB GW, HNB或者 HNB GW返回分配的地址和端口， 以更新 IMS域 通信对端媒体面承载信息。 这样， 可以将电路域语音呼叫转移到 IMS域， 无需像现有技术中在每个 HNB上都集成 UA,降低了 HNB复杂度及成本； 并且在 UE进行切换时可保持通信连续性。 附图说明
图 1为本发明实施例中通信系统架构示意图；
图 2为本发明实施例中的另一通信系统架构示意图；
图 3为本发明实施例一中提供的呼叫流程图；
图 4为本发明实施例一中提供的呼叫流程图；
图 5为本发明实施例一中提供的呼叫流程图；
图 6为本发明实施例二中提供的呼叫流程图；
图 7为本发明实施例二中提供的呼叫流程图；
图 8为本发明实施例二中提供的切换处理流程图；
图 9为本发明实施例三中提供的切换处理流程图；
图 10为本发明实施例三中提供的切换处理流程图；
图 11为本发明实施例三中提供的切换处理流程图；
图 12为本发明实施例三中提供的切换处理流程图；
图 13为本发明实施例提供的一种实现 IMS通信的装置示意图； 图 14为本发明实施例提供的另一种实现 IMS通信的装置示意图； 图 15为本发明实施例提供的又一种实现 IMS通信的装置示意图； 具体实施方式
鉴于现有技术中小区重选导致的 UE 不可达或者信令负荷过大以及 由于集成了 UA导致的家庭基站 HNB过于复杂和成本过高的问题， 本发 明实施例提供一种从家庭基站 HNB实现 IMS语音业务的方法， 当 UE附 着在家庭基站 HNB时， 让 UE的用户数据流直接从家庭基站 HNB或者 家庭基站网关 HNB GW路由至目的实体， 不经过移动核心网络， 减少对 移动核心网的资源消耗， 同时也降低用户资费， 让 UE的控制面信令还是 经过移动核心网， 避免了 HNB过于复杂和信令负荷过大的问题。
本发明实施例提供的技术方案中， 将家庭基站或者家庭基站网关提 供的地址和端口通知 IMS域； 将 IMS域提供的地址和端口通知家庭基站 或者家庭基站网关； 在家庭基站或者家庭基站网关与 IMS域之间直接建 立承载，后续如果 IMS域通信对端媒体面已更新， 则 MSC服务器 server 通知 HNB或者 HNB GW。 从家庭基站网关直接到 IMS域的承载建立方 式有两种： 一、 MSC server将家庭基站网关当成基站控制器 RNC, 通过 Iu-CS接口控制它建立承载； 二、 MSC server将家庭基站网关当成媒体网 关 MGW, 通过 Mc接口控制它建立承载。 UE从 HNB接入时， 控制面经 由 MSC server接入 IMS , 用户面从 HNB或者 HNB GW直接路由至目的 实体， 用户面旁路了移动核心网， 即媒体流从 HNB直接路由到 IMS域通 信对端， 避开了移动核心网。
具体地， UE做被叫时， MSC server接收并响应来自 IMS域呼叫 UE 的请求消息并寻呼该 UE,该消息包含 IMS域的媒体面信息，也称为会话 描述协议（SDP, Session Description Protocol )信息； 附着在 HNB的用 户设备 UE回应寻呼后， 发送承载指配消息给 HNB或者 HNB GW (所谓 发送消息给 HNB是指消息经过 HNB GW, 但 HNB GW只是筒单传递给 HNB; 所谓发送消息给 HNB GW是指消息经过 HNB GW, 而且它处理该 消息并建立到媒体网关的承载， 然后它再发送建立承载消息给 HNB, 建 立到 HNB的承载， 这个说法适用于全文）， 并使用所述 IMS域的媒体面 信息 SDP中的地址和端口建立承载； HNB或者 HNB GW分配地址和端 口并发送承载建立应答消息给 MSC server, MSC server采用 HNB或者 HNB GW分配的地址和端口与 IMS域通信对端协商承载， 以建立呼叫。 后续如果 IMS域通信对端媒体面已更新， 则 MSC server通知 HNB或者 HNB GW。 或者 UE做被叫时， MSC server把 HNB GW作为 MGW, 发 送 IMS域通信对端的地址和端口给 HNB GW并让 HNB GW准备承载， HNB GW提供地址和端口， MSC server用此与对端协商媒体面。
UE做主叫时， MSC server先用空的地址和端口向 IMS域通信对端发 起呼叫， IMS域通信对端回应媒体信息后，通过承载指配消息发送给 HNB 或者 HNB GW, HNB或者 HNB GW回应自己的地址和端口， MSC server 用此向 IMS域通信对端发起更新， 完成承载协商。 UE做主叫时， 也可以 由 MSC server把 HNB GW作为媒体网关并让 HNB GW准备承载， 然后 用 HNB GW提供的地址和端口作为承载向 IMS域通信对端发起呼叫， IMS域通信对端回应媒体信息后， MSC server将 IMS域通信对端的地址 和端口告诉 HNB GW。
UE从宏基站切换到 HNB时， MSC server在切换请求消息里携带 IMS 域通信对端的给 HNB或者 HNB GW (要求 MSC server保存 IMS域通信 对端的地址和端口 ) , HNB或者 HNB GW返回分配的地址和端口， MSC server用此地址和端口对 IMS域通信对端更新承载。或者 UE从宏基站切 换到 HNB时， 由 MSC server把 HNB GW作为 MGW并让 HNB GW准 备承载， MSC server用此地址和端口对 IMS域通信对端进行媒体面更新； UE从 HNB切换到宏基站时， MSC server选择一个 MGW,让 MGW 准备承载， MGW提供地址和端口， MSC server用此与 IMS域通信对端 进行媒体面更新； MSC server让 MGW准备另一个承载， MGW提供地址 和端口，切换请求消息里携带此地址和端口给 HNB或者 HNB GW, HNB 或者 HNB GW返回分配的地址和端口。
这样， 可以将电路域语音呼叫转移到 IMS域， 无需像现有技术中在 每个 HNB上都集成 UA, 降低了 HNB复杂度及成本； 并且在 UE进行切 换时可保持通信连续性。
为使本发明的原理、 特性和优点更加清楚， 下面结合具体实施对本 发明进行描述。
架构一
本发明实施例中的通信系统架构， 如图 1 所示， 本实施例提供的一 种实现无线 IMS通信的系统， 包括：
控制面子系统， 如图 1 实线所示， 包括具有用户代理功能的 MSC server, 用于将家庭基站或者家庭基站网关提供的地址和端口通知 IMS 域； 将 IMS域提供的地址和端口通知家庭基站或者家庭基站网关；
用户面子系统， 如图 1 虚线所示， 在家庭基站或者家庭基站网关与 IMS域之间直接建立承载； 在用户面上， UE从家庭基站或家庭基站网关 连接到因特网， 旁路移动核心网。 该系统中增强的 MSC server具备 UA功能， 而 HNB没有 UA功能。 UE 附着在 HNB上或宏基站上， 都可以通过增强的 MSC server向 IMS网络注 册， 如果 UE进行了小区重选， 也能保证从 IMS域来的信令消息发送给增 强的 MSC server , 该 MSC server可以寻呼到该 UE。 架构二
本发明实施例中的通信系统架构， 如图 2所示， 一种实现 IMS语音 的通信系统， 包括：
控制面子系统， 如图 2 实线所示， 包括具有用户代理功能的 MSC server, 用于将家庭基站网关提供的地址和端口通知 IMS域； 将 IMS域 提供的地址和端口通知家庭基站网关； MSC server把家庭基站网关作为 媒体网关， 通过 Mc接口控制它建立承载。
用户面子系统， 如图 2虚线所示， 在家庭基站网关与 IMS域之间直 接建立承载； UE从家庭基站网关出用户面接口到因特网， 旁路移动核心 网。
该系统中增强的 MSC server具备 UA功能， 而 HNB可以不具有 UA功 能。 UE附着在 HNB上或宏基站上， 都可以通过增强的 MSC server向 IMS 网络注册， 如果 UE进行了小区重选， 也能保证从 IMS域来的信令消息发 送给增强的 MSC server , 该 MSC server可以寻呼到该 UE。
实施例一
本实施例中描述的是在 UE作为被叫 UE的情况下， 在上述两种架构 下的实施流程。
当有来自 IMS 的信令消息到达增强的 MSC server 时， 增强的 MSC server向宏基站和 HNB都发起寻呼，如果 UE从宏基站应答，则 MSC server 选择一个 MGW建立呼叫并且用 MGW提供的媒体面进行承载协商。 如果 UE 从薦应答， MSC server在承载指配消息中携带来自 IMS的 INVITE等消 息中的媒体面地址和端口作为 7 载的媒体面， HNB或者 HNB GW分配对应 的媒体面地址和端口， 然后把地址和端口作为媒体面地址提供给 MSC server。 所谓对应的地址和端口是指能和 IMS域通信对端地址和端口通 讯的地址和端口，比如 IMS域通信对端提供的是公网地址和端口，则 HNB 或者 HNB GW提供公网地址和端口， 如果 IMS域通信对端提供的是私网地 址和端口则 HNB或者 HNB GW提供私网地址和端口。 在以下的实施例中的 HNB或者 HNB GW分配对应的媒体面地址和端口也是如此分配。 MSC server 用此媒体面地址与 IMS域通信对端协商媒体面。或者如果 UE从 HNB应答， MSC server选择 HNB GW作为 MGW建立承载并且用 MGW提供的媒体面进行 承载协商。
下面结合附图具体阐述 UE附着在 HNB时，该 UE作为被叫 UE , 由 HNB 路由到 IMS域通信对端的情形的实施例。
参照图 3 , 本实施例中呼叫流程包括如下步骤：
S101、 从 IMS域呼叫 UE , 即发送呼叫请求 inv i te消息给 MSC 服务器， 该消息包含呼叫发起方的媒体面信息；
5102、 MSC服务器 server在 UE注册的位置区里的宏基站和 HNB上寻呼 该 UE;
5103、 附着在 HNB的 UE回应寻呼消息；
S104、 MSC 服务器 server发送呼叫建立 se tup消息给 UE , UE回应呼叫 确认给 MSC服务器 server。 在此过程中它们可以协商承载参数；
5105、 MSC 服务器 server发送承载指配消息给 HNB , 指配的承载的媒 体面使用 S 101中 SDP里的媒体面信息；
5106、 HNB判断承载指配里的媒体面地址是公网地址， 则 HNB也提供 自己的某个公网地址和端口作为对应的媒体面， 然后 HNB发送承载指配命 令消息给 UE;
5107、 UE建立无线承载， 向 HNB返回承载指配完成消息；
5108、 HNB回应承载指配完成消息给 MSC服务器 server , 该承载指配 完成消息包含步骤 S 106中提供的媒体面信息；
S109、 MSC服务器 server将家庭基站提供的地址和端口通知 IMS域 通信对端 IMS域， 与 IMS域通信对端协商地址和端口。
至此呼叫建立完毕， 媒体流从 HNB直接路由到 IMS域通信对端， 避 开了移动核心网。
在前述架构一中， 作为被叫的 UE附着在 HNB, 由 HNB GW直接路由到 IMS域通信对端的情形与作为被叫的 UE附着在 HNB, 由 HNB直接路由到 IMS域通信对端的情形基本相同， 其区别在于， 前一种情形由 HNB GW分 配媒体面信息， 包括地址和端口； 媒体流从所述 HNB GW直接路由到 IMS 域通信对端。
参照图 4 , 本实施例中呼叫流程的步骤 S201-S204与步骤 S101-S104 相同；
5205、 MSC 服务器 server发起承载指配。 使用来自 IMS域通信对端的 提供的 SDP中的 IP地址和端口等信息作为承载信息；
5206、 HNB GW分配地址和端口； HNB GW发起承载指配， 向 UE发送指 配命令， 使用分配的地址和端口建立承载；
5207、 HNB与 UE进行 7 载建立， UE向 HNB返回指配完成消息；
5208、 HNB分配地址和端口， 发送承载指配回应消息给 HNB GW, 用此 地址和端口建立 7 载；
5209、 HNB GW分配地址和端口， 发送承载指配回应消息给 MSC 服务 器 server , 用此地址和端口作为 载信息；
5210、 MSC 服务器 server将 HNB GW提供的地址和端口通知 IMS域通 信对端， 与 IMS域通信对端进行地址和端口协商，在呼叫建立后， 媒体流 直接路由到呼叫对端。
本实施例具体阐述基于系统架构二，并且作为被叫的 UE附着在 HNB, 由 HNB GW直接路由到 IMS域通信对端的情形。
参照图 5 , 本实施例中呼叫流程包括如下步骤：
S301-S304与实施例一的 S101-S104相同；
S305、 MSC 服务器 server选择 HNB GW作为 MGW, 命令 HNB GW建立承载， 发送添加 载命令给 HNB GW, HNB GW返回地址和端口；
S306、 MSC 服务器 server发送承载指配消息给 HNB, 指配的承载的媒 体面使用 S 305中 HNB GW提供的地址和端口；
S307、 HNB分配对应的地址和端口， 然后 HNB发送承载指配命令消息 给 UE;
S308、 UE建立无线承载， 向 HNB发送指配完成消息； 5309、 HNB回应承载指配完成消息给 MSC 服务器 server , 包含步骤 S 307中分配的地址和端口；
5310、 MSC服务器 server将此地址和端口通知 IMS域通信对端， 并 与 IMS域通信对端进行媒体面信息协商。
至此呼叫建立完毕，媒体流可以从 HNB直接路由到 IMS域通信对端， 避开了移动核心网。 本文中其他涉及到架构二的承载建立过程都可以参 考该流程。 上述实施例提供的技术方案中， 从 IMS域寻呼 UE时， MSC服 务器 server在宏基站和 HNB上都做寻呼， UE从 HNB应答寻呼，则 MSC服 务器 server在后续呼叫建立过程中不选择 MGW, 而是将 IMS域通信对端 的地址和端口发送给 HNB或者 HNB GW, HNB或者 HNB GW回应自己的地址 和端口， MSC服务器 server将 HNB或者 HNB GW提供的地址和端口通知 IMS域通信对端， 完成媒体面信息协商。 这样使得 UE的用户数据流直接 从 HNB或者 HNB GW路由至目的实体， 即媒体流从 HNB直接路由到 IMS域 通信对端， 避开了移动核心网。 高效便捷， 不经过移动核心网络， 减少 对移动核心网的资源消耗也筒化了数据流的路由。
下面阐述在 UE附着在 HNB , 该 UE作为被叫 UE , 需要插入编解码器 的情形下的实施过程。
本实施例中， 若 UE 与对端的编解码（codec)协商不出编解码方式， 则需要设置语音编解码器（Transcoder ), 具体地， 在系统中引入媒体网 关 MGW, 以利用 MGW实现语音编解码器功能。
参照图 6 , 本实施例中提供的呼叫流程包括如下步骤：
步骤 S401-S404与实施例一中步骤 S101-S104相同， 在此不再重复；
5405、 当确定需要使用编解码器， MSC服务器 server发送添加承载 消息给 MGW, MGW向 MSC 服务器 server发送添加承载响应消息， 回应建立 7 载的地址和端口；
5406、 MSC 服务器 server发送承载指配命令给 HNB , 并携带 MGW提供 的地址和端口；
5407、 HNB向 UE发送承载指配命令信息； UE完成指配后， HNB回应 MSC 服务器 server指配完成信息； 5408、 MSC 服务器 server发送建立承载消息给 MGW, MGW回应建立承 载的地址和端口；
5409、 MSC服务器 server将 MGW提供的地址和端口通知 IMS域通 信对端 IMS域， 与 IMS域通信对端进行地址和端口的媒体面协商。
至此呼叫建立完毕，媒体流经过移动核心网路由到 IMS域通信对端， 由 MGW完成编解码转换。
实施例二
参照图 7 , 本实施例中附着在 HNB 的 UE做主叫，并且 MSC服务器 server后续通知 HNB更新媒体面， 呼叫流程包括如下步骤：
S501、 UE发起呼叫请求；
5502、 MSC 服务器 server回应并进行呼叫处理；
5503、 MSC 服务器 server进行承载指配， 不携带地址和端口， 或者 构造一个地址和端口， 比如全 0的地址和全 0的端口或者一个任意的和端 口；
S504、 HNB向 UE发送指配命令， 命令 UE进行承载建立；
5505、 UE向 HNB发送指配完成信息；
5506、 HNB向 MSC 服务器 server发送承载指配回应， 该消息中携带有 地址和端口， 或者 HNB GW获知 UE完成承载指配， 向 MSC服务器 server发 送承载指配回应， 该消息中携带有地址和端口；
S507、 MSC 服务器 server向 IMS域发起呼叫请求， 用 HNB或者 HNB GW 提供的地址和端口进行媒体面信息协商；
5508、 与 IMS域通信对端进行媒体面信息协商；
5509、 MSC 服务器 server发起承载修改， 向 HNB发送承载指配信息， 该信息包括对端提供的地址和端口；
S510、HNB向 MSC 服务器 server发送承载指配回应消息，或者 HNB GW 获知 MSC服务器 server发起承载修改， 向 MSC 服务器 server发送承载 指配回应消息。
或者本实施例中也可以把 S503-S510中替换为： MSC服务器 server 把 HNB GW作为媒体网关， 并让 HNB GW准备承载， 用此承载与 IMS域通 信对端协商媒体面。
参照图 8 , 本实施例中附着在 HNB 的 UE做主叫，并且 MSC服务器 server通知 IMS域通信对端更新媒体面， 呼叫流程包括如下步骤：
S601、 UE发起呼叫请求；
S602、 MSC服务器 server回应并进行呼叫处理；
5603、 MSC服务器 server向 IMS域发起呼叫请求（inv i te) , 提供的地 址和端口为空；
5604、 MSC服务器 server与 IMS域通信对端进行媒体面协商， 该 IMS域 通信对端提供其地址和端口；
S605、 MSC服务器 server发起承载指配请求， 该请求消息包括 IMS域 通信对端提供的地址和端口；
5606、 HNB发送承载指配命令给 UE;
5607、 UE建立承载， 并发送指配完成信息给 HNB;
5608、 HNB或者 HNB GW分配对应的地址和端口， 回应承载指配回应消 息给 MSC服务器 server , 该指配回应消息包括分配的地址和端口；
5609、 MSC服务器 server将 HNB或者 HNB GW分配的地址和端口通 知 IMS域通信对端进行媒体面更新；
或者 MSC服务器 server选择 HNB GW作为 MGW, 并让该 HNB GW提供 承载， 用此向 IMS域通信对端发起呼叫。
综上所述， 本发明实施例提供的技术方案中， UE做主叫发起呼叫请 求时， MSC服务器 server先用空的承载地址与端口向 IMS域通信对端发 起呼叫， IMS域通信对端回应媒体信息后， 通过承载指配消息发送给 HNB 或者 HNB GW, HNB或者 HNB GW回应自己的地址和端口， MSC服务器 server 用此地址向 IMS域通信对端发起更新， 完成 SDP协商。 而无需像现有技 术中在在每个 HNB上都集成 UA, 降低了 HNB复杂度及成本。
实施例三
本实施例提供一种 UE进行切换时的处理流程。
情形一， UE从 HNB切换到宏基站。
参照图 9 , 本实施例中 UE切换流程包括如下步骤： 5701、 HNB决定发起切换到宏基站；
HNB发送重定位请求 re loca t ion requi red给 MSC服务器 server ;
5702、 MSC服务器 server判断是要切换到宏基站， 则 MSC服务器 server选择一个 MGW, MSC服务器 server命令 MGW建立承载。 MSC 服务器 server发送添加承载（add reques t)请求消息给 MGW, MGW准备承载并回应 添加响应消息（add response) , 提供地址和端口。
5703、 MSC服务器 server发送重定位请求消息给宏基站， 用 MGW提供 的地址和端口建立 7 载；
5704、 宏基站回应重定位响应， 包含了分配的地址和端口， 与 MGW完 成 7 载建立；
5705、 MSC服务器 server向 HNB发送切换命令；
5706、 HNB发送切换命令给 UE;
5707、 UE接入到目标宏基站， 目标宏基站发送切换完成消息给 MSC服 务器 server ;
S708、 MSC服务器 server发送添加承载指示给 MGW, MGW通过向 MSC服 务器 server发送添加承载响应提供地址和端口；
S709、 MSC服务器 server将 MGW提供的包括地址和端口的承载信息 通知 IMS域通信对端， 发起媒体面更新或者重协商， 该媒体面更新或者重 协商包括 S708中提供的地址和端口， 以便更新对端媒体面信息。
需要说明的是， 为了提高切换效率， 减少时延， S708步和 S709步也 可以提前到 S701步之后的任何步骤进行。
情形二， UE从宏基站切换到 HNB。
参照图 10 , 本实施例中 UE切换流程包括如下步骤：
S801、 宏基站发起切换请求， 向 MSC服务器 server发送重定位请求； S802、 MSC服务器 server发送重定位请求给 HNB, 所携带的地址和端 口是 MSC 服务器 server中保存的 IMS域通信对端提供的地址和端口；
5803、 HNB或者 HNB GW分配对应的地址和端口， 发送重定位请求确认 消息给 MSC服务器 server , 包含分配的地址和端口；
5804、 MSC服务器 server向所述宏基站发送切换命令， 命令该宏基站 进行切换；
5805、 宏基站发送切换命令给 UE;
5806、 UE接入目标 HNB, HNB发送切换完成消息给 MSC服务器 server；
5807、 MSC服务器 server将 HNB或者 HNB GW提供的地址和端口通知 IMS 域通信对端， 用 HNB或者 HNB GW提供的地址和端口更新 IMSi或通信对端的 媒体面信息。
需要说明的是， 为了提高切换效率， 减少时延， 步骤 S807可以在步 骤 S803之后的任何步骤开始。
或者本实施例中 S802-S807步可以替换为： MSC服务器 server把 HNB GW作为 MGW, 命令 HNB GW准备承载， 然后把 HNB GW提供的地址和端口 通知 IMS i或通信对端， 用 HNB或者 HNB GW提供的地址和端口更新 IMS 域通信对端的媒体面信息。 在 HNB上建立承载的过程与现有的切换流程 相同。
情形三， UE从 HNB切换到宏基站并且 MSC服务器 server发生变更 参照图 11 , 本实施例中 UE切换流程包括如下步骤：
5901、 HNB向 MSC服务器 server发起重定位请求；
5902、 MSC服务器 server判断 UE需要进入到另一 MSC后， MSC服务器 server选择一个 MGW, 如 MGW1 , 并向 MGW1发送添加 MGW请求， 命令 MGW1添 加一个承载， MGW1返回添加 MGW响应；
S903、 MSC服务器 server选择目标 MSC服务器 server , 并发送切换准 备消息；
S904、 目标 MSC 服务器 server选择一个 MGW, 如 MGW2 , 并向 MGW2发送 添加 MGW请求， 并添加一个 7 载， MGW2返回添加 MGW响应， 提供地址和端 口；
S905、 目标 MSC 服务器 server发送重定位请求消息给目标宏基站， 包含步骤 S904MGW2提供的地址和端口；
5906、 宏基站向目标 MSC服务器 server返回重定位请求确认信息；
5907、 目标 MSC服务器 server向 MGW2发送添加承载请求信息， 指示 MGW2添加一个 7|载， MGW2返回添加 载应答信息； 5908、 目标 MSC服务器 server向源 MSC服务器 server发送准备切换响 应， 并在应答消息中携带步骤 S907中 MGW添加的承载信息， 该承载信息包 括地址和端口；
5909、 源 MSC服务器 server发送重定位命令给 HNB, HNB发送重定位命 令给 UE , 并提供地址和端口；
5910、 源 MSC服务器 server发送承载修改请求消息给 MGWl , 将步骤 S909得到的地址和端口通知 MGWl , MGW1根据此地址和端口建立承载。 MGW1 向源 MSC服务器 server回应承载修改响应；
5911、 UE接入目标宏基站， 宏基站向目标 MSC服务器 server发送切 换完成信息；
5912、 目标 MSC服务器 server向源 MSC服务器 server发送切换完成信 息；
591 3、 源 MSC服务器 server命令 MGWl建立一个承载，并提供相应的地 址和端口；
S914、 源 MSC服务器 server将该地址和端口通知 IMS域通信对端， 使 用该地址和端口对 IMS或通信对端的媒体面进行更新。
需要说明的是， 为了提高切换效率， 步骤 S91 3和 S914可以在步骤 S901后的任何一步开始执行。
情形四， UE从宏基站切换到 HNB 且 MSC server变更
参照图 12 , 本实施例中 UE切换流程包括如下步骤：
S100 宏基站发起重定位请求；
S1002、 源 MSC服务器 server判断需要向 IMS域通信对端发送用户媒 体数据流，则发送准备切换指示给目标 MSC服务器 server ,其中包含了 IMS 或通信对端的媒体面信息；
S1003 , 目标 MSC服务器 server发送重定位请求给 HNB, 该重定位请求 携带有 IMS域通信对端的媒体面信息；
51004、 HNB或者 HNB GW准备承载， 回应重定位请求确认给目标 MSC 服 务器 server , 其中包含了提供的地址和端口；
51005、 目标 MSC 服务器 server发送切换准备指示消息应答给源 MSC 服务器 server , 该准备指示消息包含了 HNB的地址和端口；
51006、 源 MSC服务器 server向宏基站发送切换命令， 命令宏基站进 行切换；
51007、 宏基站发送切换命令给 UE;
S1008 , UE接入 HNB后， HNB发送切换完成信息给目标 MSC服务器 server ;
51009、 目标 MSC服务器 server切换完成后， 发送切换完成消息通知 源 MSC服务器 server ;
51010、 源 MSC服务器 server将 HNB或者 HNB GW提供的地址和端口通 知 IMS域通信对端， 并对 IMS域通信对端媒体面进行更新。
需要说明的是， 为了提高切换效率， 步骤 S101 0可以在 S1005之后 的任何一步开始进行。
或者由 MSC服务器 server选择 HNB GW作为 MGW, 并命令 HNB GW建 立承载， 用此对 IMS域通信对端媒体面进行更新。
参照图 13 , 本发明实施例提供的一种实现无线 IMS通信的装置 1 30 , 包括：
接收单元 131 ,用于接收 IMS域呼叫 UE的请求消息， 该请求消息包 含 IMS域的地址和端口；
控制单元 132, 用于指示 HNB提供地址和端口， 并通知 HNB使用 所述 IMS域的地址和端口作为承载信息建立连接；
发送单元 133 , 用于将 HNB提供的地址和端口通知 IMS i或通信对 端 IMS域。
参照图 14 , 本发明实施例提供的另一种实现无线 IMS 通信的装置 140, 包括：
响应单元 141 , 接收并响应本端的 UE发起的呼叫请求， 指示 HNB 或 HNB GW进行承载指配， 提供地址和端口；
呼叫处理单元 142 , 向 IMS域通信对端发起呼叫请求， 并携带本端 HNB或 HNB GW提供的地址和端口， 接收 IMS域通信对端提供的地址 和端口； 发送单元 143 , 将 IMS i或通信对端提供的地址和端口发送给 HNB 或者 HNB GW。
参照图 15, 本发明实施例提供的又一种实现 IMS通信的装置 150, 包括：
接收单元 151 , 接收宏基站发送的切换请求消息；
发送单元 152, 将所述切换请求消息发送给目标 HNB, 该请求包含 地址和端口；
响应单元 153, 接收目标 HNB 的切换应答消息， 该消息包含 HNB 分配的地址和端口；
通知单元 154, 用于将 HNB分配的地址和端口通知 IMS域通信对 端进行媒体面更新。
综上所述， 本发明实施例提供的技术方案中， 接收并响应来自 IMS域 呼叫 UE的请求消息并寻呼该 UE , 该消息包含 IMS域的媒体面信息 SDP; 附 着在 HNB的用户设备 UE的回应后， 发送承载指配消息给 HNB , 并使用所述 IMS域的媒体面信息 SDP作为承载信息； 采用本端分配的地址和端口与 IMS 域通信对端协商媒体面， 以建立呼叫。 UE从 HNB接入时， 控制面都走 MSC server , 用户面从 HNB直接路由至目的实体， 旁路了移动核心网。 寻呼 UE 时， MSC server在宏基站和 HNB上都进行寻呼， 如果是 UE从 HNB应答寻呼， 贝 MSC server在后续呼叫建立过程中将 IMS域通信对端的承载信息发送 给 HNB, HNB回应自己的地址和端口， MSC server将 HNB提供的承载通知 IMS 域通信对端，完成 SDP协商，而不需选择 MGW。 UE做主叫的时候， MSC server 先用空的承载地址向 IMS域通信对端发起呼叫， IMS域通信对端回应媒体 信息后， 通过承载指配消息发送给 HNB, HNB回应自己的地址和端口， MSC server用此地址和端口向 IMS域通信对端发起更新， 完成 SDP协商。 UE从 宏基站切换到 HNB的时候， MSC server不选择 MGW, 在 handover reques t 消息里携带 IMS域通信对端的地址和端口给 HNB , HNB返回自己的媒体地 址， MSC server用此协商 SDP。 这样， 在小区重选时可避免导致 UE不可达， 无需像现有技术中在每个 HNB上都集成 UA , 降低了 HNB复杂度及成本； 并 且在 UE进行切换时可保持通信连续性。 本发明将 UA集成到 MSC server, 减少了 HNB的复杂性， 有利于降低 成本。 对于 IMS域 UE的锚点总是在 MSC server, 避免 UE不能被寻呼到。 提供了在 HNB和宏基站之间的切换方法， 而且保证切换后的用户面是最 优化的。 由于对现有的接口协议没有修改， 易于实现。
显然， 本领域的技术人员应该明白， 上述的本发明的各单元或各步 骤可以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者分布在多个计算装置所组成的网络上， 可选地， 它们可以用计算装 置可执行的程序代码来实现， 从而， 可以将它们存储在存储装置中由计 算装置来执行， 或者将它们分别制作成各个集成电路模块， 或者将它们 中的多个单元或步骤制作成单个集成电路模块来实现。 这样， 本发明不 限制于任何特定的硬件和软件结合。
本发明实施例提供的上述技术方案的全部或部分可以通过程序指令 相关的硬件来完成， 所述程序可以存储在可读取的存储介质中， 该存储 介质包括： ROM, RAM,磁碟或者光盘等各种可以存储程序代码的介质。 以上所述仅为本发明的较佳实施例而已， 并非用于限定本发明的保护范 围。 凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进等， 均包含在本发明的保护范围内。
十

Claims

权 利 要 求
1、 一种实现无线多媒体通信的方法， 其特征在于， 该方法包括： 将家庭基站或者家庭基站网关提供的地址和端口通知 IMS域通信对 端提供的地址和端口且将所述 IMS域通信对端提供的地址和端口通知所 述家庭基站或者家庭基站网关；
在所述家庭基站或者家庭基站网关与所述 IMS域通信对端之间直接 建立承载。
2、 如权利要求 1所述的通信方法， 其特征在于， 附着在所述家庭基 站的用户设备作为被叫时， 所述将家庭基站或者家庭基站网关提供的地 址和端口通知 IMS域通信对端提供的地址和端口且将所述 IMS域通信对 端提供的地址和端口通知所述家庭基站或者家庭基站网关具体包括： 将 IMS域通信对端提供的地址和端口通知家庭基站或者家庭基站网 关；
将所述家庭基站或者所述家庭基站网关提供的地址和端口通知所述 IMS域通信对端。
3、 如权利要求 2所述的通信方法， 其特征在于， 若所述地址和端口 由家庭基站提供， 则业务数据流从所述家庭基站直接路由到 IMS域通信 对端； 或
若地址和端口由所述家庭基站网关提供， 则所述业务数据流从所述 家庭基站网关直接路由到 IMS域通信对端。
4、 如权利要求 1所述的通信方法， 其特征在于， 附着在家庭基站的 所述用户设备作为主叫时， 所述将家庭基站或者家庭基站网关提供的地 址和端口通知 IMS域通信对端提供的地址和端口且将所述 IMS域通信对 端提供的地址和端口通知所述家庭基站或者家庭基站网关具体包括： 接收所述用户设备发起的呼叫请求， 响应并指示所述用户设备所属 家庭基站建立承载；
向 IMS域通信对端发起呼叫请求， 并携带所述家庭基站或者家庭基 站网关提供的地址和端口；
接收 IMS域通信对端提供的地址和端口； 将 IMS域通信对端提供的地址和端口发送给家庭基站或者所述家庭 基站对应的家庭基站网关。
5、 如权利要求 1所述的通信方法， 其特征在于， 附着在所述家庭基 站的用户设备 UE作为主叫时，将家庭基站或者家庭基站网关提供的地址 和端口通知 IMS域通信对端提供的地址和端口且将所述 IMS域通信对端 提供的地址和端口通知所述家庭基站或者家庭基站网关具体包括：
接收所述用户设备发起的呼叫请求；
向 IMS域通信对端发起呼叫请求， 携带空的地址和端口；
接收所述 IMS域通信对端提供的地址和端口；
发起承载建立， 将所述 IMS域通信对端提供的所述地址和端口发送 给所述家庭基站或者所述家庭基站对应的家庭基站网关；
接收家庭基站或者家庭基站网关提供的地址和端口；
通过携带所述家庭基站或者家庭基站网关提供的地址和端口， 向所 述 IMS域通信对端发起用户面更新。
6、 如权利要求 1所述的通信方法， 其特征在于， 所述方法进一步包 括：
接收家庭基站发起切换到宏基站的请求消息， 并指示媒体网关建立 承载；
响应所述切换到宏基站的请求， 并指示所述用户设备进行切换到宏 基站， 将所述媒体网关提供的地址和端口通知 IMS域通信对端；
当所述用户设备切换到宏基站后， IMS 域通信对端利用所述媒体网 关提供的地址和端口建立业务承载。
7、 如权利要求 6所述的通信方法， 其特征在于， 当所述用户设备从 源 MSC切换到目标 MSC, 还包括：
所述用户设备切换到目标宏基站， 目标 MSC服务器向源 MSC服务器发 送切换完成信息；
源 MSC服务器命令所述媒体网关建立承载，将所述媒体网关提供的地 址和端口通知 IMS域通信对端， 以更新 IMS域通信对端的媒体面信息。
8、 一种实现 UE切换的方法， 其特征在于， 包括： 接收宏基站发送的切换请求消息；
将所述切换请求消息发送给目标家庭基站， 并在该请求携带 IMS域 通信对端的地址和端口；
接收家庭基站的切换应答消息， 该消息包含家庭基站或者家庭基站 网关提供的地址和端口；
将家庭基站或者家庭基站网关提供的地址和端口通知 IMS域通信对 端， 以进行媒体面信息更新。
9、 一种实现无线 IMS的通信系统， 其特征在于， 包括：
控制面子系统， 包括具有用户代理的 MSC服务器， 用于将家庭基站 或者家庭基站网关提供的地址和端口通知 IMS域； 将 IMS域提供的地址 和端口通知家庭基站或者家庭基站网关； 如果从家庭基站网关发送业务 数据流， MSC服务器控制家庭基站网关建立承载；
用户面子系统，在家庭基站或者家庭基站网关与 IMS域之间直接建立 IP承载； UE从家庭基站或家庭基站网关出用户面连接到因特网。
10、 一种实现无线 IMS的通信系统， 其特征在于， 包括控制面子系 统和用户面子系统：
所述控制面子系统， 具有用户代理的 MSC服务器， 用于将家庭基站 网关提供的地址和端口通知 IMS域； 将 IMS域提供的地址和端口通知家 庭基站网关； MSC服务器把家庭基站网关作为媒体网关控制家庭基站网 关建立承载；
所述用户面子系统，在家庭基站或者家庭基站网关与 IMS域之间直接 建立承载； UE从家庭基站或家庭基站网关出用户面连接到因特网。
11、 一种实现无线 IMS通信的装置， 其特征在于， 包括：
接收单元， 用于接收 IMS域通信对端呼叫 UE的请求消息， 该请求 消息包含 IMS域通信对端的地址和端口；
控制单元， 用于指示家庭基站提供地址和端口， 并通知家庭基站使 用所述 IMS域通信对端的地址和端口建立连接；
发送单元， 用于将家庭基站提供的地址和端口通知所述 IMS域通信 对端。
12、 一种实现无线 IMS通信的装置， 其特征在于， 包括：
响应单元，接收并响应 UE发起的呼叫请求，指示家庭基站或家庭基 站网关进行承载指配， 接收包括所述家庭基站或家庭基站网关提供的地 址和端口的 7 载指配响应；
呼叫处理单元， 向 IMS域通信对端发起呼叫请求， 所述呼叫请求携 带家庭基站或家庭基站网关提供的地址和端口， 接收 IMS域通信对端提 供的地址和端口；
发送单元， 将 IMS域通信对端提供的地址和端口发送给家庭基站或 者家庭基站网关。
13、 一种实现无线 IMS通信的装置， 其特征在于， 包括：
接收单元， 接收宏基站发送的切换请求消息；
发送单元， 将所述切换请求消息发送给目标家庭基站， 该请求包含 当前的地址和端口；
响应单元， 接收目标家庭基站的切换应答消息， 该消息包含家庭基 站提供的地址和端口；
通知单元， 用于将家庭基站提供的地址和端口通知 IMS域通信对端。
14、 一种实现无线多媒体通信的方法， 其特征在于， 该方法包括： 判断需要使用编解码器时， 将媒体网关作为编解码器， 并由所述媒 体网关建立承载；
将所述媒体网关提供的地址和端口发送给家庭基站， 以使得所述家 庭基站完成承载指配；
将所述媒体网关提供的地址和端口发送给 IMS域通信对端， 与所述 IMS域通信对端进行媒体面信息协商。
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