WO2011029242A1 - 切换处理方法、系统及增强型基站 - Google Patents

切换处理方法、系统及增强型基站 Download PDF

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Publication number
WO2011029242A1
WO2011029242A1 PCT/CN2009/073920 CN2009073920W WO2011029242A1 WO 2011029242 A1 WO2011029242 A1 WO 2011029242A1 CN 2009073920 W CN2009073920 W CN 2009073920W WO 2011029242 A1 WO2011029242 A1 WO 2011029242A1
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WIPO (PCT)
Prior art keywords
base station
enhanced base
destination
enhanced
source
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PCT/CN2009/073920
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English (en)
French (fr)
Inventor
王欣晖
李靖
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to PCT/CN2009/073920 priority Critical patent/WO2011029242A1/zh
Publication of WO2011029242A1 publication Critical patent/WO2011029242A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a handover processing method, system, and enhanced base station.
  • 1 is a schematic structural diagram of a conventional Global System for Mobile communications (GSM), which includes a core network and a base station controller (Base Station Controller).
  • the base station controller and the base station belong to the base station system (Base Station Subsystem, called the BSS), between the core network and the BSC, and the base station controller and the base station belong to the base station system (the base station subsystem, the cylinder is called the BSS).
  • the interface is called the A interface.
  • the interface between the BSC and the BTS is called the Abis interface.
  • the interface between the BTS and the mobile terminal (the mobile station is called the MS) is called the Um interface.
  • the core network, the BSC and the BTS work together to the MS. Provide complete mobile voice monthly features.
  • the handover process occurs in the private mode of the mobile terminal, that is, the mobile terminal transfers from the BTS (ie, the source BTS) that currently provides the wireless service to another BTS that provides the wireless service (ie, , purpose BTS).
  • the BTS ie, the source BTS
  • another BTS that provides the wireless service
  • switching can be divided into the following three cases:
  • FIG. 2 is a schematic diagram of inter-BSS handover in a conventional GSM network according to the related art.
  • the source BTS belongs to a certain BSS system
  • the destination BTS belongs to another BSS system
  • the mobile terminal is from the source.
  • the movement of the BTS to the destination BTS has resulted in a change in the BSS providing the service.
  • FIG. 3 is a schematic diagram of inter-BTS handover in the BSS in the conventional GSM network according to the related art.
  • the source BTS belongs to a certain BSS system, and the destination BTS also belongs to the BSS.
  • the mobile terminal moves from the source BTS to the destination BTS only to cause a change in the BTS providing the service, but the BSC system does not change.
  • FIG. 4 is a schematic diagram of intra-BTS handover in a conventional GSM network according to the related art. As shown in FIG. 4, the source BTS and the destination BTS are the same BTS, and the mobile terminal is from the BTS.
  • the wireless channel is transferred to another wireless channel of the BTS.
  • the mobile process only causes a change in the BTS radio channel providing the service, but the BSS system does not change.
  • 5 is a schematic structural diagram of a flattened GSM network according to the related art.
  • the system includes a core network and an enhanced base station (enhanced base station, called a eBTS), wherein the core network and the enhancement
  • the interface between the type of base stations is an A interface
  • the interface between the enhanced base station and the mobile terminal is an Um interface
  • a new interface is defined between the enhanced base station and the enhanced base station, and the new interface is called an enhanced base station.
  • the inter-interface (ie, the eBTS interface) is used for interaction between the enhanced base station and the enhanced base station; the core network and the enhanced base station work together to provide the complete mobile voice service function to the MS.
  • the mobile terminal still has a handover procedure in the dedicated mode, that is, the mobile terminal transfers from the eBTS that currently provides the wireless service (ie, the source eBTS) to another eBTS that provides the wireless service (ie, the destination) eBTS), or the mobile terminal transfers from one of the wireless channels of the eBTS to another wireless channel providing wireless monthly service of the same eBTS.
  • FIG. 6 is a schematic diagram of the transition from BSS to eBTS after the GSM network according to the related art evolves from the conventional to the flat, as shown in FIG.
  • the eBTS and the destination eBTS are directly connected to the core network.
  • the functions originally belonging to the BSC for example, radio resource management, call control, etc., will be distributed to each eBTS.
  • the flat GSM network can still use the original A port.
  • the signaling process is used to complete the handover, and the content and quantity of the signaling can be kept unchanged. 2.
  • FIG. 7 is a schematic diagram of the transition from BTS to eBTS in the BSS after the GSM network evolves from the conventional to the flattening according to the related art, as shown in FIG.
  • the switched source eBTS and destination eBTS are directly connected to the core network.
  • the switching source BSC and the switching destination BSC are both the same BSC, and after the network is flattened, the switching source eBTS and the switching destination eBTS will not be the same eBTS. Therefore, after the network is flattened, the original BSS handover will be changed to similar to the original BSS handover.
  • the A interface interacts. The number of signaling will be significantly increased, and the signaling processing load of the core network will increase accordingly.
  • FIG. 8 is a schematic diagram of the transition from BTS to eBTS after the GSM network according to the related technology evolves from the traditional to the flat. As shown, the source eBTS and the destination eBTS are the same eBTS, and the mobile terminal transfers from a certain wireless channel of the eBTS to another wireless channel of the eBTS, and switches over. The process only caused the wireless channel of the eBTS providing the service to change.
  • a handover processing method is provided.
  • the handover processing method includes: when the mobile terminal needs to handover from the source enhanced base station to the destination enhanced base station, the source enhanced base station and the destination enhanced base station pass between the source enhanced base station and the destination enhanced base station
  • the enhanced inter-base station interface transmits information required for handover, and during the handover, the source enhanced base station and the destination enhanced base station transmit data through the enhanced inter-base station interface.
  • the source enhanced base station and the destination enhanced base station transmit data through the enhanced inter-base station interface, including: the source enhanced base station sends the first message to the destination enhanced base station, where the first message carries the source enhanced base station The first information of the data transmitted between the enhanced base station and the destination enhanced base station; the destination enhanced base station transmits the uplink data to the source enhanced base station through the enhanced inter-base station interface according to the first information.
  • the destination enhanced base station sends a second message to the source enhanced base station, where the second message carries the source enhanced base station and the destination enhancement Second information for transmitting data between the type of base stations; the source enhanced base station transmits downlink data to the destination enhanced base station through the enhanced inter-base station interface according to the second information.
  • the destination enhanced base station initiates a connection request to the core network through the A interface; After the core network responds to the response information of the connection request, the destination enhanced base station establishes a channel for transmitting data between the destination enhanced base station and the core network according to the first connection information used by the core network for transmitting data carried in the response information.
  • the first message sent by the source enhanced base station to the destination enhanced base station carries the second connection information used by the core network to transmit data to the source enhanced base station, and the destination enhanced base station passes the A according to the second connection information.
  • the interface establishes a channel between the enhanced base station and the core network for transmitting data.
  • the target enhanced base station after establishing a channel between the destination enhanced base station and the core network and the mobile terminal switches to the destination enhanced base station, notifies the core network to release resources for the source enhanced base station, and the enhanced base station and the core The network transmits data through the channel.
  • the destination enhanced base station after establishing a channel between the destination enhanced base station and the core network and the mobile terminal switches to the destination enhanced base station, notifies the source enhanced base station to release resources for the mobile terminal through the enhanced inter-base station interface.
  • the source enhanced base station and the destination enhanced base station transmit information through the enhanced inter-base station interface, including: the target enhanced base station receives the handover request message from the source enhanced base station through the enhanced inter-base station interface, where the handover request message is used. Instructing the mobile terminal to switch from the source enhanced base station to the destination enhanced base station; the destination enhanced base station sends a handover confirm message to the source enhanced base station through the enhanced base station interface, where the handover confirm message is used to indicate that the destination enhanced base station can perform the handover. And the wireless channel information for handover allocated by the destination enhanced base station.
  • a system is provided.
  • the system according to the present invention includes a source enhanced base station and a destination enhanced base station for handover by a mobile terminal.
  • the source enhanced base station and the destination enhanced base station pass The enhanced inter-base station interface between the source enhanced base station and the destination enhanced base station transmits information required for handover, and during the handover, the source enhanced base station and the destination enhanced base station transmit data through the enhanced inter-base station interface.
  • the system further comprises: a core network, configured to establish a connection with the destination enhanced base station through the A interface.
  • An enhanced base station includes: a first transmitting module, configured to: when a mobile terminal needs to When the enhanced base station is handed over to the target enhanced base station, the first message and the downlink data are sent to the destination enhanced base station through the enhanced inter-base station interface between the enhanced base station and the destination enhanced base station, where the first message is used to indicate that the mobile terminal needs Switching from the enhanced base station to the destination enhanced base station and first information for establishing data transmission between the source enhanced base station and the destination enhanced base station; the first receiving module, configured to receive the enhanced base station from the destination through the enhanced base station interface The second message and the uplink data, where the second message is used to indicate that the destination enhanced base station can perform handover, the wireless channel information for handover allocated by the destination enhanced base station, and the source enhanced base station and the target enhanced base station The second information between the data is transferred.
  • a first transmitting module configured to: when a mobile terminal needs to When the enhanced base station is handed over to the target enhanced base station, the first message and the downlink data are sent to the destination enhanced base
  • Another enhanced base station includes: an enhanced base station interface between the stations transmitting a second message and downlink data to the source enhanced base station, wherein the second message is used to indicate that the enhanced base station can perform handover, enhanced a radio channel information for handover and a second information for establishing data transmission between the source enhanced base station and the destination enhanced base station; a second receiving module, configured to receive the source enhanced type through the enhanced inter-base station interface
  • the first message and the uplink data of the base station are used to indicate that the mobile terminal needs to switch from the source enhanced base station to the enhanced base station and the first information used to establish data transmission between the source enhanced base station and the destination enhanced base station.
  • the invention adopts a method for performing information and voice data interaction by using an eBTS interface during handover, and solves an A-port interactive signal caused by switching between BTS switching to eBTS in a BSS after flattening of a GSM network in the related art.
  • the problem of significantly increasing the number and loss or delay of voice data during the handover process, thereby reducing the number of A-port interaction signaling and reducing the loss or delay of the voice signal during handover.
  • FIG. 1 is a schematic structural diagram of a conventional GSM according to the related art
  • FIG. 2 is a schematic diagram of inter-BSS handover in a conventional GSM network according to the related art
  • FIG. 3 is a BSS in a conventional GSM network according to the related art.
  • FIG. 4 Schematic diagram of switching between internal BTS
  • Figure 4 is a schematic diagram of intra-BTS handover in a conventional GSM network according to the related art
  • Figure 5 is a schematic diagram of a structure of a flattened GSM network according to the related art
  • Figure 6 is a GSM network according to the related art from a conventional After flattening, the transition between BSS and eBTS is switched.
  • Figure 7 is a schematic diagram of the transition from BTS to eBTS in the BSS after the GSM network according to the related technology evolves from the traditional to the flat.
  • FIG. 9 is a flowchart of a handover processing method according to an example 1 of the embodiment of the present invention.
  • FIG. 9 is a flowchart of a handover processing method according to an embodiment of the present invention.
  • FIG. 11 is a structural block diagram of a system according to an embodiment of the present invention.
  • FIG. 12 is a structural block diagram of an eBTS according to an embodiment of the present invention;
  • FIG. It is a structural block diagram of another eBTS in the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • the switching between BTSs in the BSS is changed to the inter-eBTS handover, which significantly increases the number of A-port interaction signaling, and the present invention provides a handover process.
  • the scheme is as follows: When the mobile terminal needs to switch from the source eBTS to the destination eBTS, the source eBTS and the destination eBTS transmit the information required for the handover through the inter-eBTS interface between the source eBTS and the destination eBTS. After the GSM network is flattened, the information is exchanged between the eBTS interfaces, so that part of the signaling directly exchanges information between the eBTS and the eBTS, and the user voice data is transmitted between the eBTSs, thereby greatly reducing A.
  • the number of signaling required by the port solves the problem that the number of A-port signaling caused by the handover is greatly increased.
  • the method includes: in a flattened GSM network, when a mobile terminal needs to switch from a source eBTS to a destination eBTS, the source eBTS and the destination eBTS transmit information required for switching by using an inter-eBTS interface between the source eBTS and the destination eBTS, and In the process of handover, the source eBTS and the destination eBTS transmit data through the inter-eBTS interface.
  • the transmission of user voice data between the handover source eBTS and the destination eBTS is performed by using the following manner.
  • the source eBTS sends a first message to the destination eBTS, where the first message carries the first information used to establish the data transmitted between the source eBTS and the destination eBTS.
  • the destination eBTS passes the eBTS interface to the source eBTS according to the first information.
  • Manner 2 After the source eBTS sends the first message to the destination eBTS, the destination eBTS sends a second message to the source eBTS, where the second message carries the second information used to establish data transmission between the source eBTS and the destination eBTS.
  • the eBTS transmits downlink data to the destination eBTS through the inter-eBTS interface according to the second information.
  • the destination eBTS After the destination eBTS learns that the MS needs to switch to the eBTS, the destination eBTS exchanges with the core network through the A interface information, and establishes a connection between the destination eBTS and the core network for the call.
  • the destination eBTS establishes a connection with the core network in the following manner.
  • Manner 1 after the destination eBTS sends the second message to the source eBTS, the destination eBTS initiates a connection request to the core network through the A interface; after the destination eBTS receives the response information from the core network in response to the connection request, the destination eBTS according to the response information
  • the first connection information used by the core network carried in the core network to transmit data establishes a channel for transmitting data between the destination eBTS and the core network.
  • Manner 2 If the connection information of the core network A interface does not change before and after the handover, the first message sent by the source eBTS to the destination eBTS carries the second connection message used by the core network to transmit data to the source eBTS.
  • the destination eBTS establishes a channel for transmitting data between the destination eBTS and the core network through the A interface according to the second connection information.
  • the destination eBTS After the MS completes the handover, and the connection between the destination eBTS and the A-port of the core network is established, the destination eBTS notifies the core network to release the resources for the source eBTS, and uses the destination eBTS to connect to the A-port established by the core network for voice transmission.
  • the destination eBTS notifies the source eBTS to release the resources for the mobile terminal through the inter-eBTS interface.
  • the source eBTS and the destination eBTS transmit the information through the eBTS interface.
  • the destination eBTS receives the handover request message from the source eBTS through the inter-eBTS interface, where the handover request message is used to indicate that the mobile terminal needs to switch from the source eBTS to the destination eBTS;
  • the eBTS interface sends a handover confirmation message to the source eBTS, where the handover confirmation message is used to indicate the radio channel information for handover that the destination eBTS can perform handover and destination eBTS allocation.
  • the destination eBTS determines whether the mobile terminal can perform handover.
  • the destination eBTS sends a handover request rejection message to the source eBTS, and the handover request rejection message is used to reject the mobile terminal. Switch to the destination eBTS.
  • the implementation process of the embodiment of the present invention will be described in detail below with reference to examples.
  • the following describes the network element entities in the mobile communication system (for example, the flattened GSM system) according to the embodiment of the present invention; the connection relationship (ie, message interaction relationship) of each network element entity will be The subsequent description of the method of the present invention will be described in detail.
  • the flattened GSM system includes: MS (i.e., MS performing handover), eBTS1 (i.e., source eBTS), eBTS2 (i.e., destination eBTS), and a core network. It should be noted that the operation in the embodiment is only useful for the MS that performs handover, and does not act on other calls.
  • Example 1 a handover processing method is provided. When the MS needs to switch from the eBTS1 to the eBTS2, the eBTS1 sends a handover request message to the eBTS2, where the handover request message is the first message, and the eBTS2 requests the handover request message.
  • eBTSl receives from eBTS2
  • the handover request acknowledgement message is the second message.
  • the eBTS 1 sends a handover command to the MS, and forwards the downlink voice data received from the core network to the eBTS2.
  • eBTS2 After the MS successfully switches to eBTS2, eBTS2 has not established an A-port user plane connection with the core network for the MS. Therefore, the destination eBTS2 transmits the uplink voice data received from the MS to eBTS 1 by eBTS. 1 Forwarded to the core network, at the same time, the eBTS 1 forwards the downlink voice data received from the core network to the eBTS2.
  • the destination eBTS2 informs the core network that the MS has switched from the eBTS1 to the eBTS2, and establishes the A-port user plane connection between the core network and the eBTS2 for the handover user.
  • the eBTS2 notifies the eBTS1 to release the resources for the handover user, and notifies the core network to release the A port resource for the handover user between the eBTS1 and the eBTS1.
  • the switching process will be described in detail below.
  • eBTS1 When a handover between eBTS and eBTS is required (for example, by eBTS 1 to eBTS2), eBTS1 sends a handover request message to eBTS2, informing eBTS2 that the MS needs to switch to eBTS2.
  • the handover request message further includes a connection address for establishing an eBTS1 for transmitting the handover call voice data between the eBTS1 and the eBTS2, and the uplink voice data can be transmitted to the eBTS1 through the address eBTS2.
  • the handover request message carries the support capability of the MS, for example, the coding mode supported by the MS.
  • the eBTS2 After receiving the handover request message, the eBTS2 determines whether the MS can perform handover, and determines whether the eBTS2 has an idle channel or the like. If the eBTS2 determines that the MS can switch to the eBTS2, the packet 'j returns a handover request acknowledgement message to the eBTS1, where the handover request acknowledgement message includes radio channel information required for the MS handover, for example, channel frequency, time slot, and speech coding. In addition, the handover request acknowledgement message carries a connection address for establishing eBTS2 for transmitting the handover call voice data between the eBTS1 and the eBTS2, and the downlink voice data can be transmitted to the eBTS2 through the address eBTS1.
  • the eBTS2 determines that the MS cannot be switched to the eBTS2 at present, the eBTS2 replies to the handover request rejection message to the eBTS1, and the handover request rejection message may have a reason for rejecting the handover, for example, when the eBTS2 finds that there is no available channel at present, the handover The reason for the rejection of the handover request contained in the request rejection message is that there is no available channel.
  • the eBTS1 After receiving the handover request acknowledgement message replied by the eBTS2, the eBTS1 sends a handover command message to the MS through the Um interface, and the handover command message is identical to the handover command message in the traditional GSM network.
  • the MS After receiving the handover command of eBTS1, the MS performs a handover operation, switches to eBTS2, and sends a handover complete message to eBTS2 after the handover succeeds.
  • the handover procedure of the MS is exactly the same as the handover procedure in the traditional GSM network.
  • the eBTS 1 after sending the handover command to the MS, the eBTS 1 needs to send the downlink voice data sent from the A port to the MS to the eBTS2 through the enhanced inter-base station interface, and also receive the uplink forwarded from the eBTS2. Voice data, and forwarded to Core Network.
  • the eBTS2 After the eBTS2 receives the handover complete message sent by the MS or other message indicating that the MS has switched to the radio channel of the eBTS2, the eBTS2 sends the downlink voice data received from the eBTS1 to the MS through the Um interface, and receives the information from the Um interface.
  • the uplink voice data is sent to the eBTS 1.
  • an information about the A port connection of the eBTS2 for the call voice is allocated, wherein the related information includes the Internet protocol of the eBTS2. (Internet Protocol, the IP address) and the User Datagram Protocol (UDP) port number, and send a conversion request message to the core network.
  • Internet Protocol Internet Protocol, the IP address
  • UDP User Datagram Protocol
  • the conversion request message includes that the MS has switched from eBTS1 to eBTS2.
  • the indication information, and the A-port connection related information of the allocated eBTS2 for the MS voice the related information includes an IP address and a UDP port number.
  • the conversion request message carries a voice coding mode used by the MS.
  • the core network replies to the eBTS2 with a conversion request confirmation message, where the content of the conversion request confirmation message includes the A port connection related information allocated to the core network used by the call, wherein the related information includes an IP address and a UDP port number.
  • the core network uses the A port of the allocated core network to connect related information, and the A port connection related information of the eBTS2 for the MS voice carried by the eBTS2 in the conversion request message, and the two sets of information establish a connection of the eBTS2 user plane. After the connection with the eBTS2 user plane is established, the core network no longer sends downlink voice data to eBTS1, and does not receive uplink voice data sent by eBTS1.
  • the core network only sends downlink voice data to eBTS2, and only receives uplink voice from eBTS2. data. At the same time, the core network is released for the connection resource of eBTS1.
  • the eBTS2 uses the A-port connection related information of the core network allocated to the call provided in the conversion request acknowledgement message, where the related information includes the IP address and the UDP port number. As new user plane connection information, voice data is transmitted on the new user plane connection.
  • the eBTS2 directly receives the downlink voice data from the core network, and directly sends the uplink voice data to the core network, and no longer receives the downlink voice data from the eBTS1, and does not forward the uplink voice data to the eBTS1.
  • the eBTS2 sends a clear command message to the eBTS1, which is used to inform the eBTS1 that the MS has successfully switched to the eBTS2, and can release the related resources for the MS in the eBTS1, and the related resources include the Um interface radio resource and the A interface of the eBTS1. Ground resources.
  • FIG. 9 is a flowchart of a handover processing method according to the first embodiment of the present invention. As shown in FIG.
  • Step S901 source eBTS Sending a Handover Request message to the destination eBTS, informing the destination eBTS that the MS needs to switch to the eBTS;
  • Step S902 the destination eBTS sends a Handover Request ACK message to the source eBTS, informing the source eBTS that the handover is possible, and The message carries information for switching the destination channel.
  • Step S903 the source eBTS sends a Handover Command to the MS, and the process is the same as the traditional GSM network.
  • step S904 the MS sends a Handover Complete message to the MS.
  • the destination eBTS is the same as the traditional GSM network.
  • the destination eBTS sends a Switch Request message to the core network, where the message is used to inform the core network that the MS has switched from the source eBTS to the eBTS, and the message is in the message.
  • Step S906 the core network sends a conversion request confirmation (Swit)
  • the ch Request ACK message is sent to the destination eBTS, which is used to inform the destination eBTS of the IP address and UDP port number of the core network used for the call; in step S907, the destination eBTS sends a Clear Command message to the source eBTS, the message And the source eBTS sends a Clear Complete message to the destination eBTS, where the message is a preference for notifying the destination eBTS source eBTS that the resource release has been completed.
  • the voice data is forwarded between the eBTSs to realize the non-delay of the voice data in the handover.
  • the eBTS 1 when the handover between the eBTS and the eBTS is required (for example, the eBTS1 is switched to the eBTS2), the eBTS 1 sends a handover request message to the eBTS2, where the handover request message is the first message, and the eBTS2 is notified that the MS needs to switch to the eBTS2.
  • the handover request message is the first message
  • the switch request message further carries the A port connection information of the core network for receiving the call voice data, where the connection information includes the IP address and the UDP port number of the core network, and the eBTS2 connects the uplink voice through the A port connection information of the core network. Data is transferred to the core network.
  • the handover request message carries the support capability of the MS, for example, the coding mode supported by the MS. After receiving the handover request message, the eBTS2 determines whether the MS can perform handover, and determines whether the content includes the eBTS2, whether there is an idle channel or the like.
  • the eBTS2 determines that the MS can switch to the eBTS2, it returns a handover request acknowledgement message to the eBTS1, and the handover request acknowledgement message is a second message, where the handover request acknowledgement message includes radio channel information required for the MS handover, such as a channel. Frequency point, time slot and voice coding mode, and with a connection address for establishing eBTS2 for transmitting the handover call voice data between eBTS1 and eBTS2, and transmitting voice data to eBTS2 through the address eBTS1.
  • radio channel information required for the MS handover such as a channel. Frequency point, time slot and voice coding mode, and with a connection address for establishing eBTS2 for transmitting the handover call voice data between eBTS1 and eBTS2, and transmitting voice data to eBTS2 through the address eBTS1.
  • the eBTS2 determines that the MS cannot currently switch to the eBTS2, it returns a handover request rejection message to the eBTS1, and the handover request reject message has a reason for rejecting the handover. For example, when the eBTS2 finds that there is no available channel at present, the message includes the handover request. The reason for the rejection is that there is no available channel.
  • the eBTS1 After receiving the handover request acknowledgement message replied by the eBTS2, the eBTS1 sends a handover command message to the MS through the Um interface, and the handover command message is identical to the handover command message in the legacy GSM network.
  • the MS After receiving the handover command of the eBTS1, the MS performs a handover action, switches to the eBTS2, and sends a handover complete message to the eBTS2 after the handover succeeds.
  • the handover procedure of the MS is exactly the same as the handover procedure in the traditional GSM network.
  • the eBTS1 needs to forward the downlink voice data sent from the A port to the MS to the eBTS2.
  • the eBTS2 After receiving the handover complete message sent by the eBTS2, the eBTS2 sends the downlink voice data received from the eBTS1 to the MS through the Um interface, and transmits the uplink voice data received from the Um interface to the core network.
  • the eBTS2 allocates an A-port connection related information of the eBTS2 for the MS voice,
  • the related information includes the IP address and the UDP port number of the eBTS2, and the core network included in the handover request message from the eBTS1 is used to receive the A port connection information of the call voice data, where the connection information includes the IP of the core network.
  • the address and the UDP port number, the connection information is the second connection information, and the eBTS2 establishes the connection of the A port with the core network according to the connection information, and transmits the uplink voice frame received from the MS to the core on the connection.
  • the core network And transmitting, to the core network, a request message, where the content of the conversion request message includes indication information that the MS has switched from the eBTS1 to the eBTS2, and the associated A port connection related information of the eBTS2 for the MS voice, the correlation
  • the information includes the IP address and UDP port number.
  • the conversion request message carries the voice coding mode used by the MS. After receiving the conversion request message, the core network passes the eBTS2 in the conversion request message.
  • the A port connects the related message, and sends the downlink voice data of the call to the eBTS2 through the connection, stops sending the downlink voice connection of the call to the eBTS1, and receives the uplink voice data from the eBTS2, and releases the call for the call at the eBTS1.
  • the core network replies to the eBTS2 with a conversion request acknowledgement message. After receiving the conversion request acknowledgement message from the core network, the eBTS2 stops receiving the downlink voice data from the eBTS1 and receives the downlink voice data from the core network.
  • the eBTS2 sends a clear command message to the eBTS1, and the clear command message is used to notify the eBTS1 that the MS has successfully switched to the eBTS2, and the related resources for the MS in the eBTS1 may be released, and the related resources include the Um interface radio resource of the eBTS1 and the A interface. Ground resources.
  • the eBTS1 releases the related resources for the MS, and the related resources include the Um interface radio resource of the eBTS 1 and the terrestrial resource of the A interface.
  • the eBTS1 After the resource is released, the eBTS1 sends a clearing completion message to the eBTS2, which is used to inform the eBTS2 that the resources for the MS in the eBTS1 have been completely released.
  • Example 2 will be described in detail below with reference to the accompanying drawings.
  • 10 is a flowchart of a handover processing method according to Embodiment 2 of the embodiment of the present invention. As shown in FIG. 10, the process of the MS switching from the source eBTS to the destination eBTS includes the following steps S1001 to S1008: Step S1001, the source eBTS sends a handover request.
  • Step S1002 the destination eBTS sends a handover request acknowledgement (Handover Request ACK)
  • the message is sent to the source eBTS, and the source eBTS is notified to perform the handover, and the message carries information for switching the destination channel.
  • Step S1003 The source eBTS sends a handover command (Handover Command) to the MS, which is the same as the traditional GSM network;
  • Step S1004 the MS sends a Handover Complete message to the destination eBTS, which is the same as the traditional GSM network.
  • step S1005 the destination eBTS sends a Switch Request message to the core network, where the message is used to inform the core network MS.
  • the source eBTS has been switched to the eBTS, and the message carries the IP address and UDP port number assigned to the call by the destination e BTS.
  • step S1006 the core network sends a Switch Request ACK message to the destination eBTS.
  • Step S1007 The destination eBTS sends a Clear Command message to the source eBTS, where the message is used to notify the source eBTS to release the resource originally used for the MS.
  • step S1008 the source eBTS sends a Clear Complete message to the destination eBTS.
  • FIG. 11 is a structural block diagram of a system according to an embodiment of the present invention. As shown in FIG.
  • the system includes: a source eBTS and a destination eBTS for handover by a mobile terminal, When the mobile terminal needs to switch from the source eBTS to the destination eBTS, the source eBTS and the destination eBTS transmit the information required for the handover through the inter-eBTS interface between the source eBTS and the destination eBTS, and in the process of the handover, The source eBTS and the destination eBTS transmit data through the inter-eBTS interface.
  • the system further includes: a core network, configured to establish a connection with the destination eBTS through the A interface. The system is described in detail below.
  • the source eBTS is configured to initiate a handover request message to the handover destination eBTS when the MS needs to perform handover between the eBTSs, where the handover request message is the first message, and receives the destination source eBTS reply.
  • the handover request acknowledgement message, the handover request acknowledgement message is the second message, and then the handover command is sent to the MS.
  • the source eBTS releases all the resources originally used for the handover MS.
  • the destination eBTS is configured to: after receiving the handover request of the source eBTS, if the MS can switch to the eBTS, the reply source eBTS switches the acknowledgement with the radio channel information required to complete the handover.
  • the destination eBTS interacts with the core network through the A interface information to establish an A port connection between the destination eBTS and the core network for the call. After the destination eBTS completes the connection establishment of the A port, and after the MS switches to the destination eBTS, the source eBTS is notified to release all resources for the MS.
  • the voice data of the user eBTS can be transmitted between the source eBTS and the destination eBTS, and the source eBTS forwards the voice data received from the destination eBTS to the core network through the A interface, and the destination eBTS passes the voice data received from the source eBTS.
  • the Um interface is forwarded to the MS.
  • the core network is configured to establish an A port connection with the destination eBTS for the call after receiving the information of the destination eBTS for switching the eBTS, and release the source eBTS after the MS switches to the destination eBTS. Connect to port A of the call.
  • Apparatus Embodiment According to an embodiment of the present invention, an eBTS is provided. FIG.
  • the apparatus includes: a first sending module 1202, a first receiving module 1204, which is used as a source eBTS, and the following structure Detailed instructions are given.
  • the first sending module 1202 is configured to: when the mobile terminal needs to switch from the eBTS to the destination eBTS, send the first message and the downlink data to the destination eBTS by using the eBTS interface between the eBTS and the destination eBTS, where the first message is used to indicate the mobile terminal.
  • FIG. 13 is a structural block diagram of another eBTS according to an embodiment of the present invention. As shown in FIG.
  • the apparatus includes: a second sending module 1302, and a second receiving module 1304.
  • the device is used as a destination eBTS.
  • the second sending module 1302 is configured to: when the mobile terminal needs to switch from the source eBTS to the eBTS, send the second message and the uplink data to the source eBTS by using the eBTS interface between the source eBTS and the eBTS, where the second message is used to indicate the eBTS
  • the first message of the source eBTS the first message is used to indicate that the mobile terminal needs to switch from the source eBTS to the eBTS and to establish first information for transmitting data between the source eBTS and the destination eBTS.
  • the number of signaling required for the A port during handover is reduced, and at the same time, no delay of speech occurs during the handover process.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
  • they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.

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Description

切换处理方法、 系统及增强型基站
技术领域 本发明涉及移动通信领域， 尤其涉及一种切换处理方法、 系统及增强型 基站。 背景技术 图 1 是根据相关技术的传统的全球移动通信系统 （Global System for Mobile communications, 筒称为 GSM ) 的结构示意图， 如图 1所示， 该系统 包括核心网、基站控制器（ Base Station Controller, 筒称为 BSC )和基站（ Base Transceiver Station, 筒称为 BTS ) 三层， 其中， 基站控制器和基站都属于基 站系统 （ Base Station Subsystem, 筒称为 BSS ), 核心网和 BSC之间的接口 称为 A接口， BSC与 BTS之间的接口称为 Abis接口 , BTS与移动终端（ Mobile Station, 筒称为 MS ) 间的接口称为 Um接口； 核心网、 BSC和 BTS协同工 作， 向 MS提供完整的移动语音月 务功能。 在三层构架的 GSM 网络中， 移 动终端在专用模式下会发生切换过程 , 即移动终端从当前提供无线^ ^务的 BTS (即， 源 BTS ) 转移到另一个提供无线月 务的 BTS (即， 目的 BTS )。 在传统的 GSM网络中， 可以将切换分为以下 3种情况：
1. BSS间切换，图 2是根据相关技术的传统的 GSM网络中 BSS间切换 的示意图， 如图 2所示， 源 BTS属于某个 BSS系统， 目的 BTS属于另外一 个 BSS系统， 移动终端从源 BTS转移到目的 BTS的移动过程导致了提供服 务的 BSS也发生了变化。
2. BSS内 BTS间切换，图 3是才艮据相关技术的传统的 GSM网络中 BSS 内 BTS间切换的示意图，如图 3所示，源 BTS属于某个 BSS系统， 目的 BTS 也属于这个 BSS系统， 移动终端从源 BTS转移到目的 BTS的移动过程只是 导致了提供服务的 BTS发生变化 , 但 BSC系统未发生变化。 3. BTS内切换， 图 4是才艮据相关技术的传统的 GSM网络中 BTS内切 换的示意图， 如图 4所示， 源 BTS与目的 BTS是同一个 BTS , 移动终端从 该 BTS的某个无线信道转移到该 BTS的另外一个无线信道， 移动过程只是 导致了提供服务的 BTS无线信道发生了变化， 但 BSS系统未发生变化。 图 5是根据相关技术的扁平化的 GSM网络的结构示意图，如图 5所示， 该系统包括核心网和增强型基站 （ Enhanced Base Station , 筒称为 eBTS ) 两 层， 其中， 核心网与增强型基站之间的接口为 A接口， 增强型基站与移动终 端之间的接口为 Um接口， 在增强型基站与增强型基站之间还定义了新的接 口， 该新的接口称为增强型基站间接口 （即， eBTS接口）， 用于增强型基站 与增强型基站之间进行交互； 核心网和增强型基站协同工作， 向 MS提供完 整的移动语音服务功能。 在扁平化的 GSM 网络中， 移动终端在专用模式下 仍会发生切换过程， 即移动终端从当前提供无线服务的 eBTS (即， 源 eBTS ) 转移到另一个提供无线月 务的 eBTS(即， 目的 eBTS ),或者移动终端从 eBTS 的某个无线信道转移到相同的 eBTS的另外一个提供无线月 务的无线信道。 此时， 相对于传统的 GSM 网络， 由于扁平化的网络中不存在基站控制器， 因此， 在 GSM 网络扁平化以后， 部分切换过程将发生改变。 下面对扁平化 的 GSM网络的切换的变化进行详细描述。
1. BSS间切换过程将转变为 eBTS间切换，图 6是根据相关技术的 GSM 网络从传统向扁平化演变后， BSS间切换转变为 eBTS间切换的示意图， 如 图 6所示， 切换的源 eBTS和目的 eBTS直接连接到核心网。 在网络扁平化 以后， 原先属于 BSC的功能， 例如， 无线资源管理、 呼叫控制等， 将被分布 到各个 eBTS中 担， 相对于传统的 GSM网络， 扁平化的 GSM网络依然可 以沿用原来的 A口信令流程来完成切换 ,信令的内容和数量都可以保持不变。 2. BSS内 BTS间切换过程转变为 eBTS间切换， 图 7是根据相关技术 的 GSM网络从传统向扁平化演变后， BSS内 BTS间切换转变为 eBTS间切 换的示意图， 如图 7所示， 切换的源 eBTS和目的 eBTS直接连接到核心网。 与传统 GSM网络不同的是， 在传统 GSM网络中， 切换源 BSC与切换目的 BSC都是同一个 BSC, 而在网络扁平化后， 切换源 eBTS与切换目的 eBTS 将不是同一个 eBTS。 因此， 在网络扁平化后， 原先 BSS 内切换将转变为类 似原先 BSS间的切换， 相对于传统 GSM网络， 如果扁平化的 GSM网络依 然沿用原来 BSS间切换流程来完成切换的话， A 口交互的信令数量将显著 增力口 , 核心网的信令处理负荷也会相应增力口。
3. BTS内切换过程未发生本质改变， 仍旧为 eBTS内切换， 图 8是才艮据 相关技术的 GSM网络从传统向扁平化演变后， BTS 内切换转变为 eBTS 内 切换的示意图， 如图 8所示， 源 eBTS与目的 eBTS是同一个 eBTS , 移动终 端从该 eBTS的某个无线信道转移到该 eBTS的另外一个无线信道， 切换过 程只是导致了提供服务的 eBTS的无线信道发生了变化。 由上面所述可知， 在 GSM网络扁平化以后， 由于原先 BSS内 BTS间 切换将转变为 eBTS间的切换，会显著增加 A口交互信令的数量。 而事实上， 在广泛使用的传统 GSM网络中， 大部分的切换都是 BSS内 BTS间切换， 因 此， 可能会导致在网络扁平化以后 , 切换导致 A口信令数量大大增加 , 从而 使核心网 A口信令负荷增加。 并且 , 由于相关技术中存在切换过程中语音数 据出现丢失或延迟的情况， 从而导致用户感受度降低。 发明内容 针对相关技术中在 GSM网络扁平化以后， BSS内 BTS间切换转变为 eBTS间的切换， 显著增加了 A 口交互信令数量以及切换过程中语音数据丢 失或延迟的问题而提出本发明， 为此， 本发明的主要目的在于提供一种切换 处理方案， 以解决上述问题至少之一。 为了实现上述目的 ,才艮据本发明的一个方面，提供了一种切换处理方法。 才艮据本发明的切换处理方法包括： 当移动终端需要从源增强型基站切换 至目的增强型基站时， 源增强型基站和目的增强型基站通过源增强型基站和 目的增强型基站之间的增强型基站间接口传输进行切换所需要的信息 , 并在 切换的过程中， 源增强型基站和目的增强型基站通过增强型基站间接口传输 数据。 优选地，源增强型基站和目的增强型基站通过增强型基站间接口传输数 据包括： 源增强型基站向目的增强型基站发送第一消息， 其中， 第一消息中 携带有用于建立源增强型基站和目的增强型基站之间传输数据的第一信息； 目的增强型基站才艮据第一信息通过增强型基站间接口向源增强型基站发送上 行数据。 优选地， 在源增强型基站向目的增强型基站发送第一消息之后， 目的增 强型基站向源增强型基站发送第二消息， 其中， 第二消息中携带有用于建立 源增强型基站和目的增强型基站之间传输数据的第二信息； 源增强型基站根 据第二信息通过增强型基站间接口向目的增强型基站发送下行数据。 优选地， 在目的增强型基站向源增强型基站发送第二消息之后， 目的增 强型基站通过 A接口向核心网发起连接请求； 在目的增强型基站接收到来自 核心网的响应于连接请求的响应信息之后 , 目的增强型基站根据响应信息中 携带的核心网用于传输数据的第一连接信息建立目的增强型基站与核心网之 间用于传输数据的通道。 优选地， 在源增强型基站向目的增强型基站发送的第一消息中， 携带有 核心网用于向源增强型基站传输数据的第二连接信息， 目的增强型基站根据 第二连接信息通过 A接口建立目的增强型基站与核心网之间用于传输数据的 通道。 优选地，在建立目的增强型基站和核心网之间的通道且移动终端切换到 目的增强型基站之后 , 目的增强型基站通知核心网释放用于源增强型基站的 资源， 目的增强型基站和核心网通过通道进行数据传输。 优选地，在建立目的增强型基站和核心网之间的通道且移动终端切换到 目的增强型基站之后 , 目的增强型基站通过增强型基站间接口通知源增强型 基站释放用于移动终端的资源。 优选地，源增强型基站和目的增强型基站通过增强型基站间接口传输信 息包括： 目的增强型基站通过增强型基站间接口接收来自源增强型基站的切 换请求消息， 其中， 切换请求消息用于指示移动终端需要从源增强型基站切 换到目的增强型基站； 目的增强型基站通过增强型基站接口向源增强型基站 发送切换确认消息， 其中， 切换确认消息用于指示目的增强型基站可以进行 切换和目的增强型基站分配的用于切换的无线信道信息。 为了实现上述目的， 才艮据本发明的另一个方面， 提供了一种系统。 才艮据本发明的系统包括移动终端进行切换的源增强型基站和目的增强 型基站， 当移动终端需要从源增强型基站切换至目的增强型基站时， 源增强 型基站和目的增强型基站通过源增强型基站和目的增强型基站之间的增强型 基站间接口传输进行切换所需要的信息， 并在切换的过程中， 源增强型基站 和目的增强型基站通过增强型基站间接口传输数据。 优选地， 该系统还包括： 核心网， 用于与目的增强型基站通过 A接口 建立连接。 为了实现上述目的，才艮据本发明的又一个方面，提供了一种增强型基站。 根据本发明的增强型基站包括： 第一发送模块， 用于当移动终端需要从 增强型基站切换至目的增强型基站时， 通过增强型基站和目的增强型基站之 间的增强型基站间接口向目的增强型基站发送第一消息和下行数据， 第一消 息用于指示移动终端需要从增强型基站切换到目的增强型基站以及用于建立 源增强型基站和目的增强型基站之间传输数据的第一信息； 第一接收模块， 用于通过增强型基站接口接收来自目的增强型基站的第二消息和上行数据， 其中 , 第二消息用于指示目的增强型基站可以进行切换、 目的增强型基站分 配的用于切换的无线信道信息以及用于建立源增强型基站和目的增强型基站 之间传输数据的第二信息。 为了实现上述目的， 根据本发明的再一个方面， 提供了另一种增强型基 站。 根据本发明的另一种增强型基站包括：站之间的增强型基站接口向源增 强型基站发送第二消息和下行数据， 其中， 第二消息用于指示增强型基站可 以进行切换、 增强型基站分配的用于切换的无线信道信息以及用于建立源增 强型基站和目的增强型基站之间传输数据的第二信息； 第二接收模块， 用于 通过增强型基站间接口接收来自源增强型基站的第一消息和上行数据， 第一 消息用于指示移动终端需要从源增强型基站切换到增强型基站以及用于建立 源增强型基站和目的增强型基站之间传输数据的第一信息。 通过本发明 , 采用在进行切换时利用 eBTS接口进行信息和语音数据交 互的方式，解决了相关技术中在 GSM网络扁平化以后 BSS内 BTS间切换转 变为 eBTS间的切换而导致的 A口交互信令数量显著增加的以及切换过程中 语音数据丢失或延迟的问题， 进而达到了在进行切换时减少 A口交互信令数 量， 降低语音信号的丢失或延迟的效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解 ,构成本申请的一部 分， 本发明的示意性实施例及其说明用于解释本发明， 并不构成对本发明的 不当限定。 在附图中： 图 1是根据相关技术的传统的 GSM的结构示意图； 图 2是根据相关技术的传统的 GSM网络中 BSS间切换的示意图； 图 3是根据相关技术的传统的 GSM网络中 BSS内 BTS间切换的示意 图; 图 4是根据相关技术的传统的 GSM网络中 BTS内切换的示意图； 图 5是才艮据相关技术的扁平化的 GSM网络的结构示意图； 图 6是根据相关技术的 GSM网络从传统向扁平化演变后， BSS间切换 转变为 eBTS间切换的示意图； 图 7是才艮据相关技术的 GSM网络从传统向扁平化演变后， BSS内 BTS 间切换转变为 eBTS间切换的示意图； 图 8是才艮据相关技术的 GSM网络从传统向扁平化演变后， BTS内切换 转变为 eBTS内切换的示意图； 图 9是才艮据本发明实施例实例一的切换处理方法的流程图； 图 10是根据本发明实施例实例二的切换处理方法的流程图； 图 11是才艮据本发明实施例的系统的结构框图； 图 12是根据本发明实施例的一种 eBTS的结构框图； 图 13是 居本发明实施例的另一种 eBTS的结构框图。 具体实施方式 功能相克述 考虑到相关技术中在 GSM网络扁平化以后 , BSS内 BTS间切换转变 为 eBTS间的切换， 显著增加了 A口交互信令数量的问题， 本发明提供了一 种切换处理方案， 该方案的处理原则如下： 当移动终端需要从源 eBTS切换 至目的 eBTS时 ,源 eBTS和目的 eBTS通过源 eBTS和目的 eBTS之间的 eBTS 间接口传输进行切换所需要的信息。 该方案在 GSM 网络扁平化以后， 利用 eBTS间接口进行信息的交互， 使部分信令直接通过 eBTS与 eBTS之间的接 口进行信息的交互， 以及 eBTS之间传递用户语音数据， 从而大大减少了 A 口需要的信令数量，解决了切换导致的 A口信令数量大大增加的问题，同时， 在切换过程中降低语音的延迟， 提高用户的感受度。 需要说明的是， 在不冲突的情况下， 本申请中的实施例及实施例中的特 征可以相互组合。 下面将参考附图并结合实施例来详细说明本发明。 在以下实施例中，在附图的流程图示出的步骤可以在诸如一组计算机可 执行指令的计算机系统中执行， 并且， 虽然在流程图中示出了逻辑顺序， 但 是在某些情况下， 可以以不同于此处的顺序执行所示出或描述的步骤。 方法实施例 根据本发明的实施例， 提供了一种切换处理方法。 该方法包括： 在扁平 化 GSM网络中 , 当移动终端需要从源 eBTS切换至目的 eBTS时， 源 eBTS 和目的 eBTS通过源 eBTS和目的 eBTS之间的 eBTS间接口传输进行切换所 需要的信息 , 并在切换的过程中 , 源 eBTS和目的 eBTS通过 eBTS间接口传 输数据。 其中， 切换源 eBTS与目的 eBTS之间传输用户语音数据通过以下方式 进行数据传输。 方式一， 源 eBTS向目的 eBTS发送第一消息， 其中， 第一消息中携带 有用于建立源 eBTS和目的 eBTS之间传输数据的第一信息； 目的 eBTS根据 第一信息通过 eBTS间接口向源 eBTS发送上行数据。 方式二， 在源 eBTS向目的 eBTS发送第一消息之后， 目的 eBTS向源 eBTS发送第二消息，其中，第二消息中携带有用于建立源 eBTS和目的 eBTS 之间传输数据的第二信息； 源 eBTS根据第二信息通过 eBTS 间接口向目的 eBTS发送下行数据。 目的 eBTS在获知有 MS需要切换到该 eBTS之后 , 切换目的 eBTS与 核心网通过 A接口信息的交互， 建立切换目的 eBTS与核心网之间用于该呼 叫的连接。 目的 eBTS通过以下方式与核心网建立连接。 方式一， 在目的 eBTS向源 eBTS发送第二消息之后 , 目的 eBTS通过 A接口向核心网发起连接请求； 在目的 eBTS接收到来自核心网的响应于连 接请求的响应信息之后 , 目的 eBTS根据响应信息中携带的核心网用于传输 数据的第一连接信息建立目的 eBTS与核心网之间用于传输数据的通道。 方式二， 如果切换前后核心网 A口连接信息不改变， 在源 eBTS向目的 eBTS发送的第一消息中携带有核心网用于向源 eBTS传输数据的第二连接信 息， 目的 eBTS根据第二连接信息通过 A接口建立目的 eBTS与核心网之间 用于传输数据的通道。 在 MS完成切换， 且目的 eBTS与核心网的 A口连接建立完成后， 目的 eBTS通知核心网释放用于源 eBTS的资源 , 并使用目的 eBTS与核心网建立 的 A口连接进行语音传输。 在 MS完成切换， 且目的 eBTS与核心网的 A口连接建立完成后， 目的 eBTS通过 eBTS间接口通知源 eBTS释放用于该移动终端的资源。 源 eBTS和目的 eBTS通过 eBTS间接口传输信息包括： 目的 eBTS通 过 eBTS 间接口接收来自源 eBTS的切换请求消息， 其中， 切换请求消息用 于指示移动终端需要从源 eBTS切换到目的 eBTS; 目的 eBTS通过 eBTS接 口向源 eBTS 发送切换确认消息， 其中， 切换确认消息用于指示目的 eBTS 可以进行切换和目的 eBTS分配的用于切换的无线信道信息。 在目的 eBTS通过 eBTS间接口接收切换请求消息之后 , 目的 eBTS判 断移动终端是否可以进行切换， 如果不能进行切换， 则目的 eBTS向源 eBTS 发送切换请求拒绝消息 , 该切换请求拒绝消息用于拒绝移动终端切换到目的 eBTS。 下面将结合实例对本发明实施例的实现过程进行详细描述。 下面对才艮据本发明实施例的移动通信系统（例如，扁平化的 GSM系统） 中的各网元实体进行筒要描述； 各网元实体的连接关系（即， 消息交互关系） 将在后续对本发明方法进行说明时详细描述。 才艮据本发明实施例的扁平化的 GSM 系统中包括： MS (即， 进行切换 的 MS )、 eBTSl (即， 源 eBTS )、 eBTS2 (即， 目的 eBTS ) 和核心网。 需要说明的是， 实施例中的操作只对该进行切换的 MS有用 , 不会作用 于别的呼叫。 实例一 根据本发明实施例， 提供了一种切换处理方法， 当 MS 需要从 eBTSl 切换到 eBTS2时， eBTSl 向 eBTS2发送切换请求消息， 该切换请求消息即 为第一消息， eBTS2 对该切换请求消息进行确认， eBTSl 接收来自 eBTS2 的切换请求确认消息 , 该切换请求确认消息即为第二消息 , 然后， eBTS 1对 MS 发送切换命令， 并将从核心网收到的下行语音数据转发给 eBTS2。 MS 在成功切换到 eBTS2后 ,由于 jt匕时 eBTS2还未与核心网建立用于该 MS的 A 口用户面连接， 因此， 目的 eBTS2 将从 MS 收到的上行语音数据传输给 eBTS 1 , 由 eBTS 1转发给核心网， 同时， eBTS 1将从核心网收到的下行语音 数据转发给 eBTS2。 然后， 目的 eBTS2告知核心网 MS 已经从 eBTSl切换 到了 eBTS2, 并且建立核心网与 eBTS2之间用于该切换用户的 A 口用户面 连接。 eBTS2通知 eBTSl释放用于该切换用户的资源 , 并通知核心网释放与 eBTSl之间用于该切换用户的 A口资源。 下面对该切换过程进行详细说明。 在需要进行 eBTS与 eBTS间的切换时（例如 ,由 eBTS 1切换到 eBTS2 ) , eBTSl向 eBTS2发送切换请求消息， 告知 eBTS2有 MS需要切换到 eBTS2。 该切换请求消息中还带有用于建立 eBTSl 与 eBTS2之间传送该切换呼叫语 音数据的 eBTSl 的连接地址， 通过该地址 eBTS2可以将上行语音数据传送 给 eBTSl。 其中， 切换请求消息中带有 MS的支持能力， 例如， MS支持的 编码方式。 eBTS2在接收到切换请求消息后， 判断该 MS是否可以进行切换， 判断 内容包括： eBTS2是否存在空闲信道等。 若 eBTS2判断该 MS 可以切换到 eBTS2 , 贝' j向 eBTSl回复切换请求确认消息， 该切换请求确认消息中包含用 于 MS切换所需要的无线信道信息， 例如， 信道频点、 时隙和语音编码方式， 并且， 该切换请求确认消息带有用于建立 eBTSl 与 eBTS2之间传送该切换 呼叫语音数据的 eBTS2的连接地址， 通过该地址 eBTSl可以 ^)夺下行语音数 据传送给 eBTS2。 在 eBTS2判断该 MS 目前不能切换到 eBTS2的情况下， eBTS2回复切换请求拒绝消息给 eBTSl , 该切换请求拒绝消息中可以带有拒 绝切换的原因， 例如， 当 eBTS2发现目前无可用信道时， 该切换请求拒绝消 息中包含的切换请求拒绝的原因为无可用信道。 eBTSl在接收到 eBTS2回复的切换请求确认消息后 , 通过 Um接口给 MS发送切换命令消息，该切换命令消息与传统 GSM网络中的切换命令消息 完全相同。 MS在收到 eBTSl的切换命令后， 执行切换动作， 切换到 eBTS2 , 并在切换成功后发送切换完成消息给 eBTS2 , 该 MS 的切换过程与传统的 GSM网络中的切换过程完全相同。另夕卜， eBTS 1在向 MS发送切换命令之后 , 还需要将从 A口接收到的发送给该 MS的下行语音数据通过增强基站间接口 发送给 eBTS2 , 同时， 也可以接收从 eBTS2转发的上行语音数据， 并转发给 核心网。 eBTS2在接收到 MS发送的切换完成消息或者其他标示 MS已经切换到 eBTS2的无线信道的消息后， eBTS2将从 eBTSl接收到的下行语音数据通过 Um接口发送给 MS , 并且将从 Um口接收到的上行语音数据发送给 eBTS 1。 另外， 由于 eBTS2与核心网之间用于该呼叫的 A 口连接还未建立， 因此， 分配一个 eBTS2的用于该呼叫语音的 A 口连接相关信息， 其中， 该相关信 息包含该 eBTS2的因特网协议 ( Internet Protocol, 筒称为 IP )地址和用户数 据艮协议 ( User Datagram Protocol , 筒称为 UDP ) 端口号， 并发送转换请求 消息给核心网， 该转换请求消息中包括 MS 已经从 eBTSl切换到 eBTS2的 指示信息， 以及分配的用于该 MS语音的 eBTS2的 A口连接相关信息， 该相 关信息包含 IP地址和 UDP端口号。 优选的 , 转换请求消息中带有该 MS使 用的语音编码方式。 核心网在接收到来自 eBTS2的转换请求消息之后 , 由于 eBTS2与核心 网之间用于该呼叫的 A口连接还未建立， 因此， 分配核心网的用于该呼叫的 A口连接相关信息， 其中， 该相关信息包括 IP地址和 UDP端口号， 该相关 信息即为第一连接信息。 然后， 核心网向 eBTS2回复转换请求确认消息， 该 转换请求确认消息中的内容包括分配给该呼叫使用的核心网的 A口连接相关 信息， 其中， 该相关信息包括 IP地址和 UDP端口号。 核心网利用分配的核 心网的 A口连接相关信息， 以及 eBTS2在转换请求消息中携带的用于该 MS 语音的 eBTS2的 A口连接相关信息 , 这两组信息来建立 eBTS2用户面的连 接。 在与 eBTS2用户面连接建立之后， 核心网不再向 eBTSl发送下行语音 数据， 也不再接收 eBTSl发送的上行语音数据， 核心网只向 eBTS2的发送 下行语音数据， 也只接收来自 eBTS2的上行语音数据。 同时， 释放核心网用 于 eBTSl的连接资源。 eBTS2在接收到来自核心网的转换请求确认消息之后，使用该转换请求 确认消息中提供的分配给该呼叫使用的核心网的 A口连接相关信息， 其中， 该相关信息包含 IP地址和 UDP端口号作为新用户面连接信息 , 在该新用户 面连接上传送语音数据。 eBTS2直接从核心网接收下行语音数据， 并将上行 语音数据直接发送给核心网， 不再接收来自 eBTSl的下行语音数据， 也不再 将上行语音数据转发给 eBTSl。 另外， eBTS2发送清除命令消息给 eBTSl , 该消息用于告知 eBTSl , MS已经成功切换到 eBTS2, 可以释放 eBTSl中用 于该 MS的相关资源，该相关资源包括 eBTSl的 Um接口无线资源和 A接口 的地面资源。 eBTSl在接收到 eBTS2发送的清除命令之后， 释放用于该 MS的相关 资源 , 包括 eBTS 1 的 Um接口无线资源和 A接口的地面资源。 eBTS 1在资 源释放之后 , 发送清除完成消息给 eBTS2 , 该清除完成消息用于告知 eBTS2 在 eBTSl中用于该 MS的资源已经被全部释放。 下面将结合附图对实例一进行详细描述。 图 9是才艮据本发明实施例实例一的切换处理方法的流程图，如图 9所示， MS从源 eBTS切换到目的 eBTS , 该流程包括如下步骤 S901至步骤 S908: 步骤 S901 ,源 eBTS发送切换请求（ Handover Request )消息给目的 eBTS , 通知目的 eBTS有 MS需要切换到该 eBTS; 步骤 S902, 目的 eBTS发送切换请求确认 ( Handover Request ACK )消 息给源 eBTS, 告知源 eBTS可以进行切换， 并且， 该消息中携带有用于切换 目的信道的信息； 步骤 S903 , 源 eBTS发送切换命令 ( Handover Command ) 给 MS , 该 过程与传统的 GSM网络相同； 步骤 S904, MS发送切换完成 ( Handover Complete )消息给目的 eBTS , 该过程与传统 GSM网络相同； 步骤 S905 , 目的 eBTS发送转换请求（ Switch Request )消息给核心网 , 该消息用于告知核心网 MS已经从源 eBTS切换到该 eBTS , 并且， 该消息中 携带有目的 eBTS分配给该呼叫的 IP地址和 UDP端口号； 步骤 S906, 核心网发送转换请求确认 ( Switch Request ACK )消息给目 的 eBTS, 该消息用于告知目的 eBTS用于该呼叫的核心网的 IP地址和 UDP 端口号； 步骤 S907, 目的 eBTS发送清除命令（ Clear Command )消息给源 eBTS, 该消息用于通知源 eBTS释放原先用于该 MS的资源； 步骤 S908 , 源 eBTS发送清除完成 ( Clear Complete )消息给目的 eBTS , 该消息是个优选项 , 用于告知目的 eBTS源 eBTS已经完成了资源释放。 实例一通过 eBTS 之间相互转发语音数据实现切换中语音数据的不延 迟。 实例二 在需要进行 eBTS 与 eBTS 之间的切换时 （例如， 由 eBTSl 切换到 eBTS2 ) , eBTS 1 向 eBTS2发送切换请求消息 , 该切换请求消息即为第一消 息， 告知 eBTS2有 MS需要切换到该 eBTS2。 该切换请求消息中还携带有核 心网用于接收该呼叫语音数据的 A口连接信息，该连接信息包括核心网的 IP 地址和 UDP端口号， eBTS2通过该核心网的 A口连接信息将上行语音数据 传送给核心网。 其中， 切换请求消息中携带有 MS 的支持能力， 例如， MS 支持的编码方式等。 eBTS2在接收到切换请求消息之后， 判断该 MS是否可以进行切换， 判 断内容包括 eBTS2是否存在空闲信道等。 如果 eBTS2判断该 MS可以切换 到 eBTS2, 则回复切换请求确认消息给 eBTSl , 该切换请求确认消息即为第 二消息 , 该切换请求确认消息中包含用于 MS切换所需要的无线信道信息 , 如信道频点、 时隙和语音编码方式， 并且带有用于建立 eBTSl 与 eBTS2之 间传送该切换呼叫语音数据的 eBTS2的连接地址， 通过该地址 eBTSl将语 音数据传送给 eBTS2。 如果 eBTS2判断该 MS 目前不能切换到 eBTS2, 则回 复切换请求拒绝消息给 eBTSl ,该切换请求拒绝消息中带有拒绝切换的原因 , 例如， 当 eBTS2发现目前无可用信道时， 该消息中包含切换请求拒绝的原因 为无可用信道。 eBTSl在接收到 eBTS2回复的切换请求确认消息之后， 通过 Um接口 给 MS发送切换命令消息， 该切换命令消息与传统 GSM 网络中的切换命令 消息完全相同。 MS在接收到 eBTSl的切换命令之后， 执行切换动作， 切换 到 eBTS2, 并且， 在切换成功后发送切换完成消息给 eBTS2, 该 MS的切换 过程与传统的 GSM网络中的切换过程完全相同。 另外， eBTSl在给 MS发 送切换命令之后， 还需要将从 A口收到的发送给该 MS的下行语音数据转发 给 eBTS2。 eBTS2在接收到 MS发送的切换完成消息之后， eBTS2将从 eBTSl接 收到的下行语音数据通过 Um接口发送给 MS , 将从 Um接口接收到的上行 语音数据传送给核心网。 另外， 由于切换前后核心网 A口连接信息不改变， 因此， eBTS2分配一个 eBTS2的用于该 MS语音的 A口连接相关信息， 其 中， 该相关信息包含该 eBTS2的 IP地址和 UDP端口号， 结合来自 eBTSl 的切换请求消息中带有的核心网用于接收该呼叫语音数据的 A口连接信息 , 该连接信息包括核心网的 IP地址和 UDP端口号， 该连接信息即为第二连接 信息 , eBTS2才艮据该连接信息与核心网建立 A口的连接 , 并且把从 MS接收 到的上行语音帧在这个连接上的传送给核心网， 然后， 发送向核心网转换请 求消息， 该转换请求消息中的内容包括 MS 已经从 eBTSl切换到 eBTS2的 指示信息， 以及分配的用于该 MS语音的 eBTS2的 A口连接相关信息， 该相 关信息包含 IP地址和 UDP端口号。 其中， 转换请求消息中带有该 MS使用 的语音编码方式。 核心网在接收到转换请求消息之后， 通过该转换请求消息中 eBTS2 的
A口连接相关消息， 并通过该连接将该呼叫的下行语音数据发送给 eBTS2, 停止将该呼叫的下行语音连接发送给 eBTSl , 并且， 从 eBTS2接收上行语音 数据， 释放用于该呼叫在 eBTSl时使用的连接资源。 另外， 核心网向 eBTS2 回复转换请求确认消息。 eBTS2 在接收到来自核心网的转换请求确认消息之后， 停止从 eBTSl 接收下行语音数据， 改为从核心网接收下行语音数据。 eBTS2发送清除命令 消息给 eBTSl ,该清除命令消息用于告知 eBTSl , MS已经成功切换到 eBTS2 , 可以释放 eBTSl 中用于该 MS的相关资源， 该相关资源包括 eBTSl 的 Um 接口无线资源和 A接口的地面资源。 eBTSl在接收到 eBTS2发送的清除命令之后， 释放用于该 MS的相关 资源 , 该相关资源包括 eBTS 1 的 Um接口无线资源和 A接口的地面资源。 eBTSl在资源释放后， 发送清除完成消息给 eBTS2, 该消息用于告知 eBTS2 在 eBTSl中用于该 MS的资源已经被全部释放。 下面将结合附图对实例二进行详细描述。 图 10 是 居本发明实施例实例二的切换处理方法的流程图， 如图 10 所示， MS从源 eBTS切换到目的 eBTS的流程包括如下步骤 S1001 至步骤 S1008: 步骤 S1001 , 源 eBTS发送切换请求 ( Handover Request ) 消息给目的 eBTS, 通知目的 eBTS有 MS需要切换到该 eBTS; 步骤 S1002, 目的 eBTS发送切换请求确认 ( Handover Request ACK ) 消息给源 eBTS , 告知源 eBTS可以进行切换， 并且， 该消息中携带有用于切 换目的信道的信息； 步骤 S1003 , 源 eBTS发送切换命令 ( Handover Command )给 MS, 该 步骤与传统的 GSM网络相同； 步骤 S 1004 , MS发送切换完成（ Handover Complete )消息给目的 eBTS , 该过程与传统 GSM网络相同； 步骤 S1005 , 目的 eBTS发送转换请求（ Switch Request )消息给核心网 , 该消息用于告知核心网 MS已经从源 eBTS切换到该 eBTS , 并且， 该消息中 携带有目的 eBTS分配给该呼叫的 IP地址和 UDP端口号； 步骤 S 1006 , 核心网发送转换请求确认 ( Switch Request ACK ) 消息给 目的 eBTS。 步骤 S1007 ,目的 eBTS发送清除命令（ Clear Command )消息给源 eBTS , 该消息用于通知源 eBTS释放原先用于该 MS的资源； 步骤 S1008 ,源 eBTS发送清除完成（ Clear Complete )消息给目的 eBTS , 该消息是个优选项 , 用于告知目的 eBTS源 eBTS已经完成了资源释放。 实例二通过 eBTS之间转发下行语音数据结合切换前后核心网连接信息 不改变 （包括 IP地址和 UDP端口号） 的方法， 实现切换中语音数据的不延 迟。 系统实施例 根据本发明实施例 , 还提供一种系统， 图 11是根据本发明实施例的系 统的结构框图， 如图 11所示， 该系统包括： 移动终端进行切换的源 eBTS和 目的 eBTS, 当移动终端需要从源 eBTS切换至目的 eBTS时， 源 eBTS和目 的 eBTS通过源 eBTS和目的 eBTS之间的 eBTS间接口传输进行所述切换所 需要的信息， 并在所述切换的过程中， 所述源 eBTS和所述目的 eBTS通过 所述 eBTS 间接口传输数据。 其中， 该系统还包括： 核心网， 用于与所述目 的 eBTS通过 A接口建立连接。 下面对该系统进行详细描述。 源 eBTS, 用于在 MS需要进行 eBTS 间的切换时， 向切换目的 eBTS 发起切换请求消息， 该切换请求消息即第一消息， 并接收目的源 eBTS回复 的切换请求确认消息， 该切换请求确认消息即第二消息， 然后， 发送切换命 令给 MS。源 eBTS在收到目的 eBTS发送的切换成功或者释放资源的信息后 , 释放原先用于该切换 MS的全部资源。 目的 eBTS, 用于在接收到源 eBTS的切换请求之后， 若 MS可以切换 到该 eBTS , 则回复源 eBTS切换确认， 并带有完成切换所需要的无线信道信 息。 目的 eBTS与核心网通过 A接口信息的交互， 建立切换目的 eBTS与核 心网之间用于该呼叫的 A口连接。 目的 eBTS在完成 A口的连接建立之后 , 并且，在 MS切换到目的 eBTS之后 ,通知源 eBTS释放全部用于该 MS的资 源。 另外， 所述源 eBTS与目的 eBTS之间可以进行用户语音数据的传输， 源 eBTS将从目的 eBTS接收到的语音数据通过 A接口转发给核心网， 目的 eBTS将从源 eBTS接收到的语音数据通过 Um接口转发给 MS。 核心网，用于在接收到切换目的 eBTS的需要建立 A口用于切换 MS的 信息之后，建立与目的 eBTS用于该呼叫的 A口连接，在 MS切换到目的 eBTS 之后 , 释放与源 eBTS用于该呼叫的 A口连接。 装置实施例 根据本发明的实施例，提供了一种 eBTS。 图 12是根据本发明实施例的 一种 eBTS的结构框图， 如图 12所示， 该装置包括： 第一发送模块 1202、 第一接收模块 1204,该装置作为源 eBTS使用， 下面对该结构进行详细说明。 第一发送模块 1202，用于当移动终端需要从 eBTS切换至目的 eBTS时， 通过 eBTS和目的 eBTS之间的 eBTS间接口向目的 eBTS发送第一消息和下 行数据， 第一消息用于指示移动终端需要从 eBTS切换到目的 eBTS以及用 于建立所述源 eBTS和所述目的 eBTS之间传输数据的第一信息； 第一接收 模块 1204,用于通过 eBTS接口接收来自目的 eBTS的第二消息和上行数据， 其中， 第二消息用于指示目的 eBTS可以进行切换、 目的 eBTS分配的用于 切换的无线信道信息以及以及用于建立所述源 eBTS和所述目的 eBTS之间 传输数据的第二信息。 根据本发明的实施例 ,提供了另一种 eBTS。 图 13是根据本发明实施例 的另一种 eBTS的结构框图，如图 13所示，该装置包括：第二发送模块 1302、 第二接收模块 1304, 该装置作为目的 eBTS使用 , 下面对该结构进行详细说 明。 第二发送模块 1302, 用于当移动终端需要从源 eBTS切换至 eBTS时， 通过源 eBTS和 eBTS之间的 eBTS接口向源 eBTS发送第二消息和上行数据， 其中， 第二消息用于指示 eBTS可以进行切换、 eBTS分配的用于切换的无线 信道信息以及用于建立所述源 eBTS和所述目的 eBTS之间传输数据的第二 信息； 第二接收模块 1304 , 用于通过 eBTS间接口接收来自源 eBTS的第一 消息， 第一消息用于指示移动终端需要从源 eBTS切换到 eBTS 以及用于建 立所述源 eBTS和所述目的 eBTS之间传输数据的第一信息。 综上所述， 通过本发明， 减少了切换时 A 口需要的信令数量， 同时， 在切换过程中不会出现语音的延迟。 显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤可 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模块或步骤制 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。 以上所述仅为本发明的优选实施例而已， 并不用于限制本发明， 对于本 领域的技术人员来说， 本发明可以有各种更改和变化。 凡在本发明的^^申和 原则之内， 所作的任何修改、 等同替换、 改进等， 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书 一种切换处理方法， 其特征在于， 包括：
当移动终端需要从源增强型基站切换至目的增强型基站时， 所述 源增强型基站和所述目的增强型基站通过所述源增强型基站和所述目 的增强型基站之间的增强型基站间接口传输进行所述切换所需要的信 息， 并在所述切换的过程中， 所述源增强型基站和所述目的增强型基 站通过所述增强型基站间接口传输数据。 才艮据权利要求 1所述的方法， 其特征在于， 所述源增强型基站和所述 目的增强型基站通过所述增强型基站间接口传输数据包括：
所述源增强型基站向所述目的增强型基站发送第一消息， 其中， 所述第一消息中携带有用于建立所述源增强型基站和所述目的增强型 基站之间传输数据的第一信息；
所述目的增强型基站才艮据所述第一信息通过所述增强型基站间接 口向所述源增强型基站发送上行数据。 根据权利要求 2所述的方法， 其特征在于， 在所述源增强型基站向所 述目的增强型基站发送所述第一消息之后， 所述方法还包括：
所述目的增强型基站向所述源增强型基站发送第二消息， 其中， 所述第二消息中携带有用于建立所述源增强型基站和所述目的增强型 基站之间传输数据的第二信息；
所述源增强型基站才艮据所述第二信息通过所述增强型基站间接口 向所述目的增强型基站发送下行数据。 根据权利要求 3所述的方法， 其特征在于， 在所述目的增强型基站向 所述源增强型基站发送所述第二消息之后， 所述方法还包括：
所述目的增强型基站通过 A接口向核心网发起连接请求； 在所述目的增强型基站接收到来自所述核心网的响应于所述连接 请求的响应信息之后， 所述目的增强型基站根据所述响应信息中携带 的所述核心网用于传输数据的第一连接信息建立所述目的增强型基站 与所述核心网之间用于传输所述数据的通道。 根据权利要求 3所述的方法， 其特征在于， 在所述源增强型基站向所 述目的增强型基站发送的第一消息中， 所述方法还包括：
所述第一消息中携带有所述核心网用于向所述源增强型基站传输 所述数据的第二连接信息， 所述目的增强型基站才艮据所述第二连接信 息通过 A接口建立所述目的增强型基站与所述核心网之间用于传输所 述数据的通道。 才艮据权利要求 4或 5所述的方法， 其特征在于， 在建立所述目的增强 型基站和所述核心网之间的所述通道且所述移动终端切换到所述目的 增强型基站之后， 所述方法还包括：
所述目的增强型基站通知所述核心网释放用于所述源增强型基站 的资源， 所述目的增强型基站和所述核心网通过所述通道进行数据传 输。 才艮据权利要求 4或 5所述的方法， 其特征在于， 在建立所述目的增强 型基站和所述核心网之间的所述通道且所述移动终端切换到所述目的 增强型基站之后， 所述方法还包括：
所述目的增强型基站通过所述增强型基站间接口通知所述源增强 型基站释放用于所述移动终端的资源。 才艮据权利要求 1所述的方法， 其特征在于， 所述源增强型基站和所述 目的增强型基站通过所述增强型基站间接口传输所述信息包括：
所述目的增强型基站通过所述增强型基站间接口接收来自所述源 增强型基站的切换请求消息， 其中， 所述切换请求消息用于指示所述 移动终端需要从所述源增强型基站切换到所述目的增强型基站；
所述目的增强型基站通过所述增强型基站接口向所述源增强型基 站发送切换确认消息， 其中， 所述切换确认消息用于指示所述目的增 强型基站可以进行切换和所述目的增强型基站分配的用于切换的无线 信道信息。 一种系统， 包括移动终端进行切换的源增强型基站和目的增强型基站， 其特征在于， 当所述移动终端需要从所述源增强型基站切换至所述目 的增强型基站时 , 所述源增强型基站和所述目的增强型基站通过所述 源增强型基站和所述目的增强型基站之间的增强型基站间接口传输进 行所述切换所需要的信息， 并在所述切换的过程中， 所述源增强型基 站和所述目的增强型基站通过所述增强型基站间接口传输数据。
10. 根据权利要求 9所述的系统， 其特征在于， 还包括：
核心网， 用于与所述目的增强型基站通过 A接口建立连接。
11. 一种增强型基站， 其特征在于， 包括：
第一发送模块， 用于当移动终端需要从所述增强型基站切换至目 的增强型基站时， 通过所述增强型基站和所述目的增强型基站之间的 增强型基站间接口向所述目的增强型基站发送第一消息和下行数据， 所述第一消息用于指示所述移动终端需要从所述增强型基站切换到所 述目的增强型基站以及用于建立所述源增强型基站和所述目的增强型 基站之间传输数据的第一信息；
第一接收模块， 用于通过所述增强型基站接口接收来自所述目的 增强型基站的第二消息和上行数据， 其中， 所述第二消息用于指示所 述目的增强型基站可以进行切换、 所述目的增强型基站分配的用于切 换的无线信道信息以及用于建立所述源增强型基站和所述目的增强型 基站之间传输数据的第二信息。
12. 一种增强型基站， 其特征在于， 包括：
第二发送模块， 用于当移动终端需要从源增强型基站切换至所述 增强型基站时， 通过所述源增强型基站和所述增强型基站之间的增强 型基站接口向所述源增强型基站发送第二消息和下行数据， 其中， 所 述第二消息用于指示所述增强型基站可以进行切换、 所述增强型基站 分配的用于切换的无线信道信息以及用于建立所述源增强型基站和所 述目的增强型基站之间传输数据的第二信息；
第二接收模块， 用于通过所述增强型基站间接口接收来自所述源 增强型基站的第一消息和上行数据， 所述第一消息用于指示所述移动 终端需要从所述源增强型基站切换到所述增强型基站以及用于建立所 述源增强型基站和所述目的增强型基站之间传输数据的第一信息。
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Publication number Priority date Publication date Assignee Title
CN1845636A (zh) * 2005-04-07 2006-10-11 华为技术有限公司 一种基于分布式无线接入网的切换方法
CN101047967A (zh) * 2006-03-30 2007-10-03 华为技术有限公司 在切换过程中处理数据的方法及装置
WO2008114625A1 (ja) * 2007-03-19 2008-09-25 Ntt Docomo, Inc. ハンドオーバ方法及び無線基地局
CN101489271A (zh) * 2008-01-15 2009-07-22 中兴通讯股份有限公司 网元间切换控制方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1845636A (zh) * 2005-04-07 2006-10-11 华为技术有限公司 一种基于分布式无线接入网的切换方法
CN101047967A (zh) * 2006-03-30 2007-10-03 华为技术有限公司 在切换过程中处理数据的方法及装置
WO2008114625A1 (ja) * 2007-03-19 2008-09-25 Ntt Docomo, Inc. ハンドオーバ方法及び無線基地局
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