WO2011038543A1 - 一种扁平化移动通信网络的核心网、切换系统及方法 - Google Patents

一种扁平化移动通信网络的核心网、切换系统及方法 Download PDF

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Publication number
WO2011038543A1
WO2011038543A1 PCT/CN2009/074320 CN2009074320W WO2011038543A1 WO 2011038543 A1 WO2011038543 A1 WO 2011038543A1 CN 2009074320 W CN2009074320 W CN 2009074320W WO 2011038543 A1 WO2011038543 A1 WO 2011038543A1
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Prior art keywords
ebts
destination
mobile terminal
handover
source
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PCT/CN2009/074320
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English (en)
French (fr)
Inventor
王欣晖
李靖
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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/CN2009/074320 priority Critical patent/WO2011038543A1/zh
Publication of WO2011038543A1 publication Critical patent/WO2011038543A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0058Transmission of hand-off measurement information, e.g. measurement reports

Definitions

  • the present invention relates to a flattened mobile communication network, and more particularly to a core network, handover system and method for a flat mobile communication network. Background technique
  • FIG. 1 is a schematic diagram of a network architecture and an interface of a conventional Global System for Mobile Communications (GSM) system.
  • GSM Global System for Mobile Communications
  • the traditional GSM system mainly includes three layers: the core network, the base station controller (BSC), and the base station (Base Transceiver Station, BTS).
  • BSC base station controller
  • BTS Base Transceiver Station
  • one core network administers a plurality of base station controllers, and the base station control M and the base station controller N are shown in the figure;
  • one base station controller administers a plurality of base stations, wherein the base station controller M administers the base stations M1 and the base stations M2, and the base station controls The N is controlled by the base station N1 and the base station N2;
  • one base station further administers a plurality of mobile terminals (MSs).
  • MSs mobile terminals
  • one base station each administers an MS as an example
  • the base station M1 governs the mobile terminal Mi l
  • the base station M2 governs the mobile terminal.
  • M21 the base station N1 governs the mobile terminal N11 and the base station N2 governs the mobile terminal N211.
  • both the BSC and the BTS belong to the Base Station System (BSS).
  • BSS Base Station System
  • the interface between the core network and the BSC is called the A interface or the A interface.
  • the interface between the BSC and the BTS is called the Abis interface or the Abis interface.
  • the interface between the BTS and the MS is called the Um interface or the Um interface.
  • the core network, BSC and BTS work together to provide complete mobile voice service capabilities to the MS.
  • the handover process occurs in the dedicated mode of the mobile terminal, that is, the mobile terminal transfers from the BTS that currently provides the wireless service (or the BTS that serves the mobile terminal before the handover, called the source BTS) Another BTS that provides wireless service (or BTS that serves mobile terminals after handover, is called the destination BTS).
  • switching can be divided into the following three cases:
  • the source BTS belongs to a certain BSS system
  • the destination BTS belongs to another BSS system
  • the mobile terminal transfers from the source BTS to the destination BTS.
  • the BSS to the service has also changed.
  • the source BTS belongs to a certain BSS system
  • the destination BTS also belongs to the BSS system.
  • the mobile terminal moves from the source BTS to the destination BTS only to cause the BTS to provide the service. A change has occurred, but the BSC system has not changed.
  • the source BTS and the destination BTS are the same BTS, and the mobile terminal transfers from one radio channel of the BTS to another radio channel of the BTS, and the mobile process only leads to providing services.
  • the BTS radio channel has changed, but the BSS system has not changed.
  • FIG. 5 is a schematic diagram of an existing flat GSM network architecture and interface.
  • the existing flattened GSM network mainly includes two layers of a core network and an enhanced base station (eBTS), wherein an interface between the core network and the enhanced base station is an A interface, and the enhanced base station and the enhanced base station are The interface between the mobile terminals is a Um interface, and a new interface is defined between the enhanced base stations, which is called an enhanced inter-base station interface, and can be used for interaction between the enhanced base station and the enhanced base station.
  • eBTS enhanced base station
  • each enhanced base station is shown by the enhanced base station 1, the enhanced base station 2, the enhanced base station 3, and the enhanced base station 4, and each mobile terminal is shown by the mobile terminal 11, the mobile terminal 21, the mobile terminal 31, and the mobile terminal 11. .
  • the core network and the enhanced base station work together to provide the complete mobile voice service function to the MS.
  • a mobile communication network such as flat GSM, Long Term Evolution (LTE)
  • the mobile terminal still has a handover procedure in the dedicated mode, that is, the eBTS from which the mobile terminal currently provides the wireless service (or the eBTS serving the mobile terminal before the handover) , referred to as source eBTS) transferred to another eBTS providing wireless service (or eBTS serving the mobile terminal after handover, referred to as the destination eBTS), or the mobile terminal is transferred from one of the eBTS's wireless channels to the same eBTS Another wireless channel that provides wireless service.
  • the base station controller since the base station controller does not exist in the flat network, after the mobile communication network such as GSM or LTE is flattened, the partial handover process will change. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a core network, a switching system and a method for flattening a mobile communication network, which are used for implementing handover of a flat mobile communication network.
  • the present invention first provides a method for switching a flat mobile communication network, which is used to complete a mobile terminal in the flat mobile communication network at an enhanced base station.
  • the method includes:
  • the source eBTS of the handover notifies the mobile terminal of the handover that the mobile terminal is to perform the handover;
  • the destination eBTS feeds back to the source eBTS with the notification
  • the source eBTS instructs the mobile terminal to complete the handover.
  • the step of performing the interaction between the destination eBTS and the core network includes: sending, by the destination eBTS, a channel request message to a core network;
  • the channel request message carries base station side A port connection information
  • the channel request acknowledgement message includes network side A port connection information
  • the base station side A port connection information includes address information of the destination eBTS; and the network side A port connection information includes address information of the core network.
  • the core network establishes the A-port connection between the destination eBTSs, perform interaction with the destination eBTS for voice data of the mobile terminal, or perform the same with the source eBTS and the destination eBTS respectively.
  • the interaction of the voice data of the mobile terminal is not limited to the A-port connection between the destination eBTSs.
  • the destination eBTS further instructs the source eBTS to release resources for the mobile terminal, and notifies the core network to release the source eBTS for the The resources of the mobile terminal.
  • the source eBTS releases resources for the mobile terminal, further to the The destination eBTS report completes the resource release.
  • the present invention also provides a core network in a flat mobile communication network, which is used to complete handover of a mobile terminal in an enhanced base station (eBTS) in the flat mobile communication network, where:
  • eBTS enhanced base station
  • the core network is configured to establish an A-port connection for the mobile terminal after interacting with the switched eBTS.
  • the resource for the mobile terminal between the source eBTS and the handover is released according to the notification of the destination eBTS.
  • the core network is configured to perform interaction with the destination eBTS for voice data of the mobile terminal, or with the source of the handover, after the destination eBTS establishes the A port connection for the mobile terminal.
  • the eBTS and the destination eBTS respectively perform interaction of voice data of the mobile terminal.
  • the present invention further provides a switching system for a flat mobile communication network, configured to complete handover of a mobile terminal in an enhanced base station (eBTS) in the flat mobile communication network, the system comprising Core network, the source eBTS of the handover, and the destination eBTS, where:
  • eBTS enhanced base station
  • the source eBTS is configured to notify the destination eBTS that the mobile terminal is to perform the switching, and after receiving the feedback from the destination eBTS on the notification, instruct the mobile terminal to complete the handover;
  • the destination eBTS is configured to, after receiving the notification, interact with the core network and establish an A-port connection with the core network for the mobile terminal, and perform the notification to the source eBTS for the notification.
  • the core network is configured to establish the A port connection after interacting with the destination eBTS.
  • the core network is configured to perform the interaction of the voice data of the mobile terminal with the destination eBTS after establishing the A port connection with the destination eBTS, or separately from the source eBTS and the destination eBTS respectively. Performing interaction of voice data of the mobile terminal.
  • the destination eBTS is configured to, after the mobile terminal completes the handover, further instruct the source eBTS to release resources for the mobile terminal, and notify the core network to release and use the source eBTS.
  • the resources of the mobile terminal Preferably, after the source eBTS is configured to release resources for the mobile terminal, the resource egress is further reported to the destination eBTS.
  • an embodiment of the present invention has at least the following technical effects:
  • the handover of the mobile terminal in the flat mobile communication network is realized.
  • Another embodiment of the present invention has at least the following technical effects:
  • the voice data may be exchanged between the core network and the destination base station and the source base station, respectively. Therefore, there is no delay in speech or loss of data.
  • Still another embodiment of the present invention has at least the following technical effects: In the handover process of the flattened mobile communication network, no significant increase in the A port signaling is caused.
  • FIG. 1 is a schematic diagram of an architecture and an interface of a GSM network in the prior art
  • FIG. 2 is a schematic diagram of switching between BSSs of a prior art GSM network
  • FIG. 3 is a schematic diagram of switching between BTSs in a BSS of a prior art GSM network
  • FIG. 4 is a schematic diagram of handover in a BTS of a prior art GSM network
  • FIG. 5 is a schematic diagram of an architecture and an interface of a flat GSM network according to the present invention.
  • FIG. 6 is a schematic diagram of handover between eBTSs in a flat GSM network according to the present invention.
  • FIG. 7 is a schematic diagram of another handover between eBTSs in a flattened GSM network according to the present invention
  • FIG. 8 is a schematic diagram of handover in an eBTS in a flattened GSM network according to the present invention
  • FIG. 9 is a schematic diagram of a process for a MS to switch from a source eBTS to a destination eBTS in a flattened GSM system according to an embodiment of the present invention.
  • the inter-BSS handover process will be transformed into eBTS handover in the flattened network.
  • the switched source eBTS and destination eBTS are directly connected to the core network.
  • the functions of the original BSC such as radio resource management and call control will be distributed to each eBTS.
  • the flat GSM network can still use the original A-port signaling flow to complete the handover. The content and quantity of signaling can be kept unchanged.
  • the inter-BTS handover process in the BSS as shown in FIG. 3 also changes to inter-eBTS handover in the flattened network.
  • the switched source eBTS and the destination eBTS are directly Connect to the core network.
  • the source BSC and the destination BSC are both the same BSC, and after the network is flattened, the source eBTS and the destination eBTS will not be the same eBTS. Therefore, after the network is flattened, the original BSS handover will be changed to the handover between the original BSS.
  • the flat GSM network still uses the original BSS handover procedure to complete the handover, the A interface interacts. The number of signaling will increase significantly, and the signaling processing load of the core network will increase accordingly.
  • the intra-BTS handover process shown in FIG. 4 does not change substantially, and is still switched within the eBTS.
  • the source eBTS and the destination eBTS are the same eBTS, and the mobile The terminal transfers from a certain wireless channel of the eBTS to another wireless channel of the eBTS, and the handover process only causes the wireless channel of the eBTS providing the service to change.
  • the core idea of the present invention is to use the enhanced inter-base station interface to perform information exchange when the handover is required, so that part of the signaling is directly exchanged through the interface between the eBTS and the eBTS, thereby greatly reducing the letter required by the A port. Order quantity. 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 MSs.
  • each network element entity in the mobile communication system for example, a flattened GSM system, etc.
  • the connection relationship including the message interaction relationship
  • the flattened GSM system of the present invention includes: MS (MS for handover), source eBTS, destination eBTS, and core network. It should be noted that the present invention is based on a flat GSM system, and the technical solution of the present invention is applicable to other flat mobile communication networks, such as a flat LTE system.
  • the content of the technical solution of the present invention mainly includes:
  • the source eBTS and the destination eBTS exchange information through the enhanced inter-base station interface between the eBTSs, and the interaction information includes
  • the source eBTS notifies the destination eBTS that the MS wants to switch to the destination eBTS through a handover request.
  • the destination eBTS considers that the handover can be performed, and then notifies the source eBTS that the handover can be performed and the required wireless channel information for handover. .
  • the destination eBTS After the destination eBTS learns that the MS wants to switch in, it interacts with the core network through the A interface information to establish a connection between the destination eBTS and the core network for the handover. After the core network establishes the A-port connection with the destination eBTS and before the connection with the source eBTS is removed, the core network sends the voice data of the MS sent to the destination eBTS to the source eBTS, and the core network receives the source eBTS and the destination eBTS. The voice data of the MS.
  • the voice data of the MS may be exchanged only with the destination eBTS, and the user data of the MS is no longer interacted with the source eBTS, or performed separately with the destination eBTS and the source eBTS.
  • the voice data of the MS interacts.
  • 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 source eBTS for the resources of the MS, 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 resources for the MS through the enhanced inter-base station interface.
  • a method for handover processing is provided.
  • the source eBTS sends a handover request to the destination eBTS to notify the destination eBTS that the MS wants to perform the handover, and the destination eBTS pair
  • the handover request is acknowledged and an A-port connection for the handover is established with the core network.
  • the voice data for the MS is sent to the source eBTS and the destination eBTS, and the voice data of the MS is received from the source eBTS and the destination eBTS.
  • the eBTS After establishing the connection with the core network for the A port of the MS, the eBTS sends a handover confirmation to the source eBTS to feedback the notification. After the source eBTS receives the handover confirmation of the destination eBTS, the source eBTS sends a handover command to the MS. After the MS successfully switches to the destination eBTS according to the source eBTS handover command, the destination eBTS notifies the source eBTS to release the resources for the MS, and notifies the core network to release the A port resource for the MS with the source eBTS.
  • the transmission timing of the handover confirmation may be performed at any time after the target eBTS receives the handover request sent by the source eBTS and confirms it, and is not limited to the connection between the core network and the destination eBTS.
  • the source eBTS when a handover between the eBTS and the eBTS is required (switching from the source eBTS to the destination eBTS), the source eBTS sends a handover request message to the destination eBTS, informing the destination eBTS that the MS wants to switch to the destination eBTS.
  • the support request capability of the MS such as the coding mode supported by the MS and the handover reference number, may be included in the handover request message.
  • the destination eBTS After receiving the handover request message, the destination eBTS determines whether the MS can perform handover, and determines whether the content includes the idle channel of the destination eBTS. If the destination eBTS determines that the MS can be switched in, the base station side A port connection information for the MS voice transmission is generated, and the base station side A port connection information includes the address information of the destination eBTS, such as an IP address and a UDP port number, and concurrently Sending a channel request message to the core network, the content of the channel request message includes indication information that the MS needs to switch from the source eBTS to the destination eBTS, and the base station side A port connection information of the destination eBTS allocated for the MS voice transmission.
  • the channel request message carries information such as a voice coding mode that the MS will use.
  • the core network After receiving the channel request message sent by the destination eBTS, the core network has not established the connection of the A port for the handover between the destination eBTS and the core network, so the network side A port connection information for the handover is generated, including The IP address and UDP port number of the core network. Then, the destination eBTS channel request acknowledgement message is returned, and the content in the channel request acknowledgement message includes the core network side A port connection information allocated to the handover.
  • the core network uses the core network side A port connection information that has just been allocated, and the destination eBTS in the channel request message with the base station side A port connection information for the MS voice transmission to establish a connection of the destination eBTS user plane.
  • the destination eBTS user plane connection is established, the user plane connection of the source eBTS and the user plane connection of the destination eBTS are used, and the uplink voice data of the MS is received from the source eBTS and the destination eBTS, and the downlink voice data of the MS is sent to the source eBTS and Purpose eBTS.
  • the destination eBTS After receiving the channel request acknowledgement message replied by the core network, the destination eBTS establishes a connection with the A network of the core network for the MS; and sends a handover request acknowledgement message to the source eBTS, where the handover request acknowledgement message includes the information required for the MS handover.
  • Wireless channel information such as channel frequency, time slot, and speech coding.
  • the destination eBTS determines that the MS cannot currently switch to the destination eBTS, it returns a handover request rejection message to the source eBTS, and the handover request rejection message may have a reason for rejecting the handover, for example, when the destination eBTS finds that there is currently no available channel, the handover The reason why the request rejection message includes the handover request rejection is that there is no available channel, and the like.
  • the source eBTS After receiving the handover request acknowledgement message replied by the destination eBTS, the source eBTS sends a handover command message to the MS through the Um interface to indicate that the MS can perform handover, and the handover message is identical to the handover command message in the traditional GSM network. Other new messages can be constructed to implement this indication function.
  • the MS After receiving the handover command message of the source eBTS, the MS performs a handover operation, switches to the destination eBTS, and sends a handover complete message to the destination eBTS after the handover succeeds.
  • the handover process of the MS is exactly the same as that in the conventional GSM network; of course, other processes of implementing the handover according to the prior art are equally feasible.
  • the destination eBTS After receiving the handover complete message sent by the MS, the destination eBTS uses the A-port connection between the established destination eBTS and the core network for the handover to transmit voice data, and sends a handover complete message to the core network, and the handover message is sent. Used to inform the core network that the MS has completed the handover from the source eBTS to the destination eBTS. In addition, the destination eBTS sends a clear command message to the source eBTS, where the clear command message is used to inform the source eBTS that the MS has successfully switched to the destination eBTS, and the source eBTS can be released.
  • the related resources used in the MS include the Um interface radio resource of the source eBTS and the ground resource of the A interface.
  • the core network After receiving the handover complete message sent by the destination eBTS, the core network does not receive the voice data of the MS from the source eBTS, receives the voice data of the MS only from the destination eBTS, and does not send the voice data of the MS to the source eBTS. Send only the voice data of the MS to the destination eBTS, and release the A port that was originally used by the source eBTS for the MS.
  • the source eBTS After receiving the clear command message sent by the destination eBTS, the source eBTS releases the related resources for the MS, including the Um interface radio resource of the source eBTS and the terrestrial resource of the A interface. Preferably, after the resource is released, the source eBTS sends a clearing completion message to the destination eBTS, and the clearing complete message is used to inform the destination eBTS that the resources for the MS in the source eBTS have all been released.
  • the timing at which the destination eBTS sends the handover confirmation may be performed at any time after the target eBTS receives the handover request sent by the source eBTS and confirms, and is not limited to be established between the core network and the destination eBTS.
  • the destination eBTS can simultaneously reply to the source eBTS when establishing the A port connection.
  • the handover confirmation is sent, it is only necessary to enable the destination eBTS to complete the connection between the destination eBTS and the A port of the core network before the MS switches to the destination eBTS.
  • the core network receives the uplink voice data of the MS from the source eBTS and the destination eBTS.
  • the received voice data is used as valid voice data.
  • the core network determines the validity of the data, discards invalid user transmissions, and retains valid user transmission.
  • the process of determining the validity of the data by the core network may be that the core network does not receive the data packet through the A-port link, or an indication bit in the received data packet indicates that the data packet is incorrect or invalid, the core network considers that The voice data is invalid.
  • the present invention does not limit how the core network determines the validity of voice data.
  • FIG. 9 is a schematic diagram of a process in which an MS switches from a source eBTS to a destination eBTS in a flattened GSM system according to an embodiment of the present invention.
  • the MS wants to switch to the destination eBTS to continue the transmission of voice data.
  • the handover process mainly includes the following steps: Step S901: The source eBTS sends a Handover Request message to the destination eBTS to notify the destination eBTS that the MS wants to switch to the eBTS.
  • Step S902 After receiving the handover request message, the destination eBTS sends a channel request (Channel Request) message to the core network, where the channel message is used to notify the core network MS that the eBTS needs to be switched from the source eBTS to the eBTS, and the destination eBTS is assigned to the eBTS.
  • Base station side A port connection information of the handover including destination eBTS address information such as an IP address and a UDP port number;
  • Step S903 After receiving the channel request message and confirming, the core network sends a channel request acknowledgement (Channel Request ACK) message to the destination eBTS, where the channel request acknowledgement message is used to notify the destination eBTS for the network side A port connection of the handover.
  • Information including address information of the core network such as IP address and UDP port number;
  • the core network sends the downlink voice data of the MS to the source eBTS and the destination eBTS, and receives the uplink voice data of the MS sent by the source eBTS and the destination eBTS.
  • the core The network may also send the downlink voice data of the MS only to the destination eBTS, and only receive the uplink voice data of the MS sent by the destination eBTS; or the core network may only send the downlink voice data of the MS to the source eBTS, and only Receiving uplink voice data of the MS sent by the source eBTS;
  • Step S904 after receiving the channel request acknowledgement message, the eBTS sends a Handover Request ACK message to the source eBTS, and informs the source eBTS that the handover can be performed, and has information about the destination channel for handover;
  • Step S905 After receiving the handover request acknowledgement message, the source eBTS sends a handover command (Handover
  • Step S906 After receiving the handover command message and completing the handover, the MS sends a Handover Complete message to the destination eBTS.
  • the process in this step is the same as that of the traditional GSM network.
  • the destination eBTS sends the MS to the core network.
  • Step S907 the destination eBTS sends a clear command after receiving the handover complete message (Clear
  • the Command message is sent to the source eBTS, and the clear command message is used to notify the source eBTS to release the resource originally used for the MS;
  • Step S908 the destination eBTS sends a Handover Complete message to the core.
  • the network, the handover completion message is used to notify the core network to release the resources of the core network and the source eBTS for the MS; this step and step S907 have no strict sequence in time;
  • Step S909 after receiving the clear command message and releasing the resource for the MS, the source eBTS sends a Clear Complete message to the destination eBTS, and the clear complete message is a preference for informing the destination eBTS that the source eBTS has The resource release is completed; after that, the core network only sends the downlink voice data of the MS to the destination eBTS.
  • the core network in the flattened mobile communication network of the present invention is configured to establish an A-port connection for the mobile terminal after interacting with the destination eBTS of the handover; after the handover is completed, release the notification according to the destination eBTS Resources for the mobile terminal with the source eBTS of the handover.
  • the core network is configured to perform the interaction of the mobile terminal's voice data with the destination eBTS after the destination eBTS establishes the A port connection for the mobile terminal, or perform the mobile terminal with the source eBTS and the destination eBTS respectively.
  • the interaction of voice data is configured to perform the interaction of the mobile terminal's voice data with the destination eBTS after the destination eBTS establishes the A port connection for the mobile terminal, or perform the mobile terminal with the source eBTS and the destination eBTS respectively. The interaction of voice data.
  • the handover system in the flat mobile communication network of the present invention comprises a core network, a source eBTS of the handover, and a destination eBTS, wherein:
  • the source eBTS is configured to send a handover request message to the destination eBTS, and after receiving the handover request acknowledgement message sent by the destination eBTS, instruct the mobile terminal to complete the handover;
  • the destination eBTS is configured to: after receiving the handover request message, interact with the core network, and establish an A-port connection with the core network for the mobile terminal, and send the handover request acknowledgement message to the source eBTS;
  • the core network is configured to establish the A port connection after interacting with the destination eBTS.
  • the core network After the core network is configured to establish the A port connection with the destination eBTS, perform interaction with the destination eBTS for voice data of the mobile terminal, or perform voice data of the mobile terminal with the source eBTS and the destination eBTS respectively. Interaction.
  • the destination eBTS is configured to, after the mobile terminal completes the handover, further instruct the source eBTS to release resources for the mobile terminal, and notify the core network to release resources for the mobile terminal with the source eBTS. After the source eBTS is set to release the resources for the mobile terminal, the source e BTS is further reported to complete the resource release.
  • the invention 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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Abstract

本发明公开了一种扁平化移动通信网络的核心网、切换系统及方法,用于实现扁平化移动通信网络的切换,其中该方法包括:所述切换的源eBTS向所述切换的目的eBTS通知所述移动终端欲进行所述切换;所述目的eBTS与核心网进行交互后,与所述核心网之间为所述移动终端建立A口连接;所述目的eBTS就所述通知向所述源eBTS进行反馈;所述源eBTS指示所述移动终端完成所述切换。本发明实现了移动终端在扁平化移动通信网络中的切换,并保证了不会出现语音的延迟或数据的丢失。

Description

一种扁平化移动通信网络的核心网、 切换系统及方法
技术领域
本发明涉及扁平化移动通信网络, 尤其涉及一种扁平化移动通信网络的 核心网、 切换系统及方法。 背景技术
图 1为传统全球移动通信系统( Global System for Mobile Communications, GSM ) 的网络构架及接口示意图。 如图 1所示, 传统的 GSM系统主要包括 核心网、基站控制器 ( Base Station Controller, BSC )和基站( Base Transceiver Station, BTS )三层。 其中, 一个核心网管辖若干基站控制器, 图中以基站控 制 M和基站控制器 N示出; 一个基站控制器管辖若干基站, 图中以基站控制 器 M管辖基站 Ml和基站 M2,以及基站控制器 N管辖基站 N1和基站 N2示 出; 一个基站又管辖若干移动终端 (Mobile Station, MS ) , 图中以一个基站 各管辖一个 MS为例, 基站 Ml管辖移动终端 Mi l , 基站 M2管辖移动终端 M21 , 基站 N1管辖移动终端 Nl 1以及基站 N2管辖移动终端 N211。
在传统的 GSM系统的网络架构中, BSC和 BTS都属于基站系统( Base Station System, BSS )。核心网和 BSC之间的接口称为 A接口或者 A口, BSC 与 BTS间的接口称为 Abis接口或者 Abis口, BTS与 MS间的接口称为 Um 接口或者 Um口。 核心网、 BSC和 BTS协同工作, 向 MS提供完整的移动话 音服务功能。
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服务的 BTS(或者说切换前服务于移动终端的 BTS, 被称为源 BTS )转移到另一个提供无线服务的 BTS (或者说切换后服务于移 动终端的 BTS, 被称为目的 BTS ) 。
一般来说, 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, 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, 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, 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为现有的扁平化 GSM网络构架及接口示意图。如图 5所示,现有的 扁平化 GSM 网絡主要包括核心网和增强型基站 (Enhanced Base Station, 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, 增强型基站之间定义了新的接口 , 称为增 强型基站间接口, 可以用于增强型基站与增强型基站之间进行交互。 图中以 增强型基站 1、 增强型基站 2、 增强型基站 3及增强型基站 4示出各增强型基 站, 以移动终端 11、 移动终端 21、 移动终端 31及移动终端 11示出各移动终 端。
核心网和增强型基站协同工作, 向 MS提供完整的移动话音服务功能。 在扁平化的 GSM、 长期演进(LTE )等移动通信网络中, 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 (或者说切 换前服务于移动终端的 eBTS, 被称为源 eBTS )转移到另一个提供无线服务 的 eBTS (或者说切换后服务于移动终端的 eBTS, 被称为目的 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服 务的无线信道。 此时, 相对传统的 GSM、 LTE等移动通信网络, 由于扁平化 的网络中并不存在基站控制器, 因此, 在 GSM、 LTE等移动通信网络扁平化 以后, 部分切换过程将发生改变。 发明内容
本发明所要解决的技术问题, 在于需要提供一种扁平化移动通信网络的 核心网、 切换系统及方法, 用于实现扁平化移动通信网络的切换。 为了解决上述技术问题, 本发明首先提供了一种扁平化移动通信网络的 切换方法, 用于完成所述扁平化移动通信网络中的移动终端在增强型基站
( eBTS ) 间的切换, 该方法包括:
所述切换的源 eBTS向所述切换的目的 eBTS通知所述移动终端欲进行所 述切换;
所述目的 eBTS 与核心网进行交互后 , 与所述核心网之间为所述移动终 端建立 A口连接;
所述目的 eBTS就所述通知向所述源 eBTS进行反馈;
所述源 eBTS指示所述移动终端完成所述切换。
优选地, 所述目的 eBTS与所述核心网进行所述交互的步骤, 包括: 所述目的 eBTS向核心网发送信道请求消息;
所述核心网向所述目的 eBTS发送信道请求确认消息;
根据所述信道请求消息及信道请求确认消息为所述移动终端建立所述 A π连接。
优选地, 所述信道请求消息携带基站侧 A口连接信息;
所述信道请求确认消息包括网络侧 A口连接信息;
根据所述基站侧 A口连接信息及网络侧 A口连接信息, 为所述移动终端 建立所述 A口连接。
优选地, 所述基站侧 A口连接信息包括所述目的 eBTS的地址信息; 所述网络侧 A口连接信息包括所述核心网的地址信息。
优选地, 所述核心网向所述目的 eBTS之间建立所述 A口连接后, 与所 述目的 eBTS进行所述移动终端的语音数据的交互,或者与所述源 eBTS及目 的 eBTS分别进行所述移动终端的语音数据的交互。
优选地, 所述目的 eBTS在所述移动终端完成所述切换后, 进一步指示 所述源 eBTS释放用于所述移动终端的资源, 并通知所述核心网释放与所述 源 eBTS用于所述移动终端的资源。
优选地, 所述源 eBTS释放用于所述移动终端的资源后, 进一步向所述 目的 eBTS报告完成了资源释放。
为了解决上述技术问题, 本发明还提供了一种扁平化移动通信网络中的 核心网, 用于完成所述扁平化移动通信网络中的移动终端在增强型基站 ( eBTS ) 间的切换, 其中:
所述核心网设置成在与所述切换的目的 eBTS 进行交互后为所述移动终 端建立 A口连接。
优选地, 在所述切换完成后根据所述目的 eBTS 的通知释放与所述切换 的源 eBTS之间的用于所述移动终端的资源。
优选地,所述核心网设置成与所述目的 eBTS为所述移动终端建立所述 A 口连接后, 与所述目的 eBTS 进行所述移动终端的语音数据的交互, 或者与 所述切换的源 eBTS及目的 eBTS分别进行所述移动终端的语音数据的交互。
为了解决上述技术问题, 本发明还提供了一种扁平化移动通信网络的切 换系统, 用于完成所述扁平化移动通信网络中的移动终端在增强型基站 ( eBTS ) 间的切换, 该系统包括核心网、 所述切换的源 eBTS及目的 eBTS , 其中:
所述源 eBTS设置成向所述目的 eBTS通知所述移动终端欲进行所述切 换, 并在收到所述目的 eBTS 就所述通知的反馈后, 指示所述移动终端完成 所述切换;
所述目的 eBTS设置成收到所述通知后, 与所述核心网进行交互并与所 述核心网之间为所述移动终端建立 A 口连接, 并就所述通知向所述源 eBTS 进行所述反馈;
所述核心网设置成与所述目的 eBTS交互后建立所述 A口连接。
优选地,所述核心网设置成与所述目的 eBTS之间建立所述 A口连接后, 与所述目的 eBTS进行所述移动终端的语音数据的交互, 或者与所述源 eBTS 及目的 eBTS分别进行所述移动终端的语音数据的交互。
优选地, 所述目的 eBTS设置成在所述移动终端完成所述切换后, 进一 步指示所述源 eBTS释放用于所述移动终端的资源, 并通知所述核心网释放 与所述源 eBTS用于所述移动终端的资源。 优选地, 所述源 eBTS设置成释放用于所述移动终端的资源后, 进一步 向所述目的 eBTS报告完成了资源释放。
与现有技术中的常规的移动通信网络相比, 本发明的一个实施例至少具 有如下技术效果: 实现了移动终端在扁平化移动通信网络中的切换。 本发明 的另一个实施例至少具有如下技术效果: 扁平化移动通信网络中切换后的连 接建立且原连接未拆除时, 可以是核心网与目的基站及源基站之间分别进行 语音数据的交互, 因此不会出现语音的延迟或数据的丢失。 本发明的还一个 实施例至少具有如下技术效果: 扁平化移动通信网络的切换过程中, 没有导 致 A口信令的显著增加。
本发明的其它特征和优点将在随后的说明书中阐述, 并且, 部分地从说 明书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优 点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。 附图概述
附图用来提供对本发明的进一步理解, 并且构成说明书的一部分, 与本 发明的实施例一起用于解释本发明, 并不构成对本发明的限制。 在附图中: 图 1为现有技术中 GSM网络的架构及接口示意图;
图 2为现有技术 GSM网络 BSS间的切换示意图;
图 3为现有技术 GSM网络 BSS内 BTS间切换示意图;
图 4为现有技术 GSM网络 BTS内切换示意图;
图 5为本发明扁平化 GSM网络的架构及接口示意图;
图 6为本发明扁平化 GSM网络中 eBTS间的切换示意图;
图 7为本发明扁平化 GSM网络中 eBTS间的另一切换示意图; 图 8为本发明扁平化 GSM网络中 eBTS内的切换示意图;
图 9为本发明实施例扁平化 GSM系统中 MS从源 eBTS切换到目的 eBTS 的流程示意图。 本发明的较佳实施方式
以下将结合附图及实施例来详细说明本发明的实施方式, 借此对本发明 如何应用技术手段来解决技术问题, 并达成技术效果的实现过程能充分理解 并据以实施。
在 GSM、 长期演进(LTE )等移动通信网络扁平化以后, 如图 2所示的
BSS间切换过程将转变为扁平化网络中的 eBTS间切换, 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 BSC 的如无线资源管理, 呼叫控制等功能将被分布到各个 eBTS 中承担, 相对传 统 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。
在 GSM、 LTE等移动通信网络扁平化以后, 如图 3所示的 BSS内 BTS 间切换过程也转变为扁平化网絡中的 eBTS间切换, 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, 源 BSC与目的 BSC都是同一个 BSC, 而在网络扁平化后, 源 eBTS与目的 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 信令数量将显著增加, 核心网的信令处理负荷也会相应增加。
在 GSM、 LTE等移动通信网络扁平化以后, 如图 4所示的 BTS内切换 过程未发生本质改变,仍旧为 eBTS内切换,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。
由以上内容可见, 在 GSM、 LTE等移动通信网络扁平化以后, 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等移动通信网络中, 大部分的切换都 是 BSS内 BTS间切换, 因此, 在网络扁平化以后切换应该会导致 A口信令 数量大大增加,从而使核心网 A口信令负荷增加。而且,在传统的 GSM、 LTE 等移动通信网络中, 在进行 BSS间的切换时, 存在语音数据的延迟或者丟失 的问题。
本发明的核心思想是, 在需要进行切换时, 利用增强型基站间接口进行 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, 从而大大减少 A口需要的信令数量。 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 MS。
下面将对本发明实施例可实现该切换方式的移动通信系统(例如, 扁平 化的 GSM系统等)中的各网元实体进行简要描述;各网元实体的连接关系(包 括消息交互关系 )将在后续对本发明方法进行说明时详细描述。
本发明的扁平化的 GSM系统中包含: MS (进行切换的 MS )、 源 eBTS、 目的 eBTS以及核心网。 需要说明的是, 本发明是以扁平化的 GSM系统为例 说明本发明的技术方案的, 本发明的思想和技术方案还适用于其它扁平化的 移动通信网络如扁平化的 LTE系统等。
需要说明的是, 如果不冲突, 本发明实施例以及实施例中的各个特征可 以相互结合, 均在本发明的保护范围之内。 另外, 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。
本发明技术方案的内容, 主要包括: 在扁平化 GSM 网络中, 当要发生 eBTS间的切换时, 源 eBTS与目的 eBTS通过 eBTS之间的增强型基站间接 口进行信息的交互, 交互的信息包括: 源 eBTS通过一切换请求向目的 eBTS 通知有 MS欲切换到该目的 eBTS, 该目的 eBTS收到该通知后认为可以进行 切换则向源 eBTS通知可以进行切换以及用于切换所需要的无线信道信息。
目的 eBTS在获知有 MS欲要切换进来之后, 与核心网通过 A接口信息 的交互, 建立目的 eBTS 与核心网之间用于该切换的连接。 核心网在与目的 eBTS建立 A口连接后且在与源 eBTS拆除连接前, 核心网将发给目的 eBTS 的该 MS的语音数据也发送给源 eBTS, 另外,核心网从源 eBTS和目的 eBTS 接收该 MS的语音数据。 当然, 核心网与目的 eBTS建立连接后, 也可以只与 目的 eBTS进行该 MS的语音数据的交互, 而不再与源 eBTS进行该 MS的用 户数据的交互,或者与目的 eBTS及源 eBTS分别进行该 MS的语音数据交互。 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 通知核心网释放源 eBTS用于该 MS的资源,使用目的 eBTS与核心网建立的 A口连接进行语音传输。另夕卜,目的 eBTS通过增强型基站间接口通知源 eBTS 释放用于该 MS的资源。
根据本发明实施例, 提供了一种切换处理的方法, 当 MS需要从源 eBTS 切换到目的 eBTS时, 源 eBTS向目的 eBTS发送切换请求以向目的 eBTS通 知该 MS欲进行该切换, 目的 eBTS对切换请求进行确认,并且与核心网之间 建立用于该切换的 A口连接。 核心网在与目的 eBTS建立该 A口连接后, 将 用于该 MS的语音数据发送给源 eBTS和目的 eBTS,并从源 eBTS和目的 eBTS 接收该 MS的语音数据。 目的 eBTS在与核心网建立用于该 MS的 A口连接 后,向源 eBTS发送切换确认,以对该通知进行反馈。源 eBTS在收到目的 eBTS 的切换确认后, 源 eBTS对 MS发送切换命令。 MS根据源 eBTS的切换命令 成功切换到目的 eBTS后, 目的 eBTS通知源 eBTS释放用于该 MS的资源, 并通知核心网释放与源 eBTS之间用于该 MS的 A口资源。 需要说明的是, 前述切换确认的发送时机,可以在目标 eBTS收到源 eBTS发送的切换请求并 进行确认之后的任意时刻进行, 并不限定在核心网与目的 eBTS建立该 A口 连接之后。
具体地说, 在需要进行 eBTS与 eBTS间的切换时(由源 eBTS切换到目 的 eBTS ) , 源 eBTS发送给目的 eBTS的切换请求消息, 告知目的 eBTS有 MS欲要切换到该目的 eBTS。 优选的, 可以在切换请求消息中带有 MS支持 的编码方式、 切换参考号等 MS的支持能力。
目的 eBTS在收到切换倚求消息后,判断该 MS是否可以进行切换,判断 内容包括目的 eBTS是否存在空闲信道等。若目的 eBTS判断该 MS可以切换 进来, 则生成用于该 MS语音传输的基站侧 A口连接信息, 该基站侧 A口连 接信息其中含该目的 eBTS的地址信息如 IP地址和 UDP端口号,并发送信道 请求消息给核心网,该信道请求消息中的内容包括 MS需要从源 eBTS切换到 目的 eBTS的指示信息, 以及分配的用于该 MS语音传输的目的 eBTS的该基 站侧 A口连接信息。 优选的, 信道请求消息中带有该 MS将使用的语音编码 方式等信息。 核心网在收到目的 eBTS发送的信道请求消息后,由于目的 eBTS与核心 网之间用于该切换的 A口连接还未建立, 因此产生用于该切换的网络侧 A口 连接信息, 其中包括核心网的 IP地址和 UDP端口号。 然后回复目的 eBTS信 道请求确认消息, 该信道请求确认消息中的内容包括分配给该切换使用的核 心网侧 A口连接信息。 核心网利用刚才分配的核心网侧 A口连接信息, 以及 目的 eBTS在信道请求消息里带的用于该 MS语音传输的基站侧 A口连接信 息, 建立目的 eBTS用户面的连接。 在目的 eBTS用户面连接建立后, 使用源 eBTS的用户面连接和目的 eBTS的用户面连接, 从源 eBTS和目的 eBTS接 收该 MS的上行语音数据,并且发送该 MS的下行语音数据给源 eBTS和目的 eBTS。
目的 eBTS在收到核心网回复的信道请求确认消息后,为该 MS建立与核 心网的 A口连接;发送切换请求确认消息给源 eBTS,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 式等。 若目的 eBTS判断该 MS目前不能切换到目的 eBTS, 则回复切换请求 拒绝消息给源 eBTS, 该切换请求拒绝消息中可以带有拒绝切换的原因, 如当 目的 eBTS发现目前无可用信道, 则该切换请求拒绝消息中包含切换请求拒 绝的原因为无可用信道等。
源 eBTS在收到目的 eBTS回复的切换请求确认消息后,通过 Um接口给 MS发送切换命令消息以指示该 MS可以执行切换, 该切换消息与传统 GSM 网络中的切换命令消息完全相同, 当然, 也可构造其他新消息来实现该指示 功能。 MS在收到源 eBTS的切换命令消息后执行切换动作,切换到目的 eBTS, 并在切换成功后发送切换完成消息给目的 eBTS。 本实施例中, 该 MS的切换 过程与传统的 GSM网络中的切换过程完全相同; 当然,根据现有技术来实现 本切换的其他过程, 同样是可行的。
目的 eBTS在收到 MS发送的切换完成消息后,利用已经建立的目的 eBTS 与核心网之间用于该切换的 A口连接进行语音数据的传输, 并发送切换完成 消息给核心网,该切换消息用于告知核心网该 MS已经完成从源 eBTS向目的 eBTS的切换。 另外, 目的 eBTS发送清除命令消息给源 eBTS, 该清除命令 消息用于告知源 eBTS, 该 MS已经成功切换到目的 eBTS, 可以释放源 eBTS 中用于该 MS的相关资源, 包括源 eBTS的 Um接口无线资源和 A接口的地 面资源等。
核心网在收到目的 eBTS发送的切换完成消息后,不再从源 eBTS接收该 MS的语音数据, 只从目的 eBTS接收该 MS的语音数据, 也不再将该 MS的 语音数据发送给源 eBTS, 只将该 MS的语音数据发送给目的 eBTS, 并释放 原先与源 eBTS用于该 MS的 A口连接。
源 eBTS在收到目的 eBTS发送的清除命令消息后,释放用于该 MS的相 关资源, 包括源 eBTS的 Um接口无线资源和 A接口的地面资源。 优选的, 源 eBTS在资源释放后, 发送清除完成消息给目的 eBTS, 该清除完成消息用 于告知目的 eBTS在源 eBTS中用于该 MS的资源已经被全部释放了。
可选的, 上述实施例中, 目的 eBTS发送切换确认的时机, 可以在目标 eBTS收到源 eBTS发送的切换请求并进行确认之后的任意时刻进行, 并不限 定在核心网与目的 eBTS之间建立该 A口连接之后,例如, 目的 eBTS可以在 建立 A口连接时, 同时回复切换确认给源 eBTS。 无论何时发送切换确认, 只 需要能够使目的 eBTS在所述 MS切换至目的 eBTS前, 完成建立目的 eBTS 与核心网的 A口的连接。
可选的, 上述实施例中, 核心网从源 eBTS和目的 eBTS接收该 MS的上 行语音数据。当只收到源 eBTS和目的 eBTS中任意一个 eBTS的语音数据时, 将该收到的语音数据作为有效语音数据。 当两路传输均有语音数据传送给核 心网时, 核心网判断数据有效性, 丢弃无效的用户传输, 保留有效的用户传 输。 核心网判断数据有效性的过程, 可以是核心网通过 A口链路没有收到数 据包 , 或者收到的数据包中的某指示位表示该数据包是错误的或者无效时, 核心网认为该语音数据无效。 当然, 本发明并不对核心网如何判断语音数据 有效性进行限定。
下面将结合附图和实施例对本发明的方法以及上述各网元之间的消息交 互关系进行详细描述。图 9是本发明实施例扁平化 GSM系统中 MS从源 eBTS 切换到目的 eBTS的流程示意图。 如图 9所示, MS通过源 eBTS与核心网进 行语音数据传输过程中, 欲要切换到目的 eBTS下继续进行语音数据的传输, 该切换流程主要包括如下步骤: 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欲切换到该 eBTS;
步骤 S902, 目的 eBTS收到该切换请求消息后, 发送信道请求( Channel Request ) 消息给核心网, 该信道消息用于告知核心网 MS需要从源 eBTS切 换到该 eBTS, 且带有目的 eBTS分配给该切换的基站侧 A口连接信息, 包括 目的 eBTS地址信息如 IP地址和 UDP端口号;
步骤 S903 , 核心网收到该信道请求消息并进行确认后, 发送信道请求确 认( Channel Request ACK )消息给目的 eBTS, 该信道请求确认消息用于告知 目的 eBTS用于该切换的网络侧 A口连接信息, 包括核心网的地址信息如 IP 地址和 UDP端口号;
在本实施例中,核心网此时给源 eBTS及目的 eBTS均发送该 MS的下行 语音数据,并接收源 eBTS及目的 eBTS发送的该 MS的上行语音数据; 当然, 在其它实施例中, 核心网也可以仅向目的 eBTS发送该 MS的下行语音数据, 并仅接收该目的 eBTS发送的该 MS的上行语音数据;或者核心网也可以仅向 该源 eBTS发送该 MS的下行语音数据, 并仅接收该源 eBTS发送的该 MS的 上行语音数据;
步骤 S904, 目的 eBTS收到该信道请求确认消息后, 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 带有用于切换的目的信道的信息;
步骤 S905,源 eBTS收到该切换请求确认消息后,发送切换命令 ( Handover
Command ) 消息给 MS , 本步骤所述过程与传统的 GSM网络相同;
步骤 S906 , MS 收到该切换命令消息并完成切换后, 发送切换完成 ( Handover Complete ) 消息给目的 eBTS, 本步骤所述过程与传统 GSM网络 相同; 之后, 由目的 eBTS向核心网发送该 MS的上行语音数据;
步骤 S907 , 目的 eBTS 收到该切换完成消息后, 发送清除命令 ( Clear
Command )消息给源 eBTS, 该清除命令消息用于通知源 eBTS释放原先用于 该 MS的资源;
步骤 S908, 目的 eBTS发送切换完成 ( Handover Complete ) 消息给核心 网,该切换完成消息用于通知核心网释放核心网与源 eBTS用于该 MS的资源; 本步骤与步骤 S907在时间上并没有严格的先后顺序;
步骤 S909, 源 eBTS收到该清除命令消息并释放用于该 MS的资源后, 发送清除完成 (Clear Complete ) 消息给目的 eBTS, 该清除完成消息是个优 选项, 用于告知目的 eBTS, 源 eBTS已经完成了资源释放; 之后, 核心网仅 向目的 eBTS发送该 MS的下行语音数据。
根据上述实施例, 本发明扁平化移动通信网络中的核心网, 设置成在与 该切换的目的 eBTS进行交互后为该移动终端建立 A口连接; 在该切换完成 后根据该目的 eBTS的通知释放与该切换的源 eBTS之间的用于该移动终端的 资源。
其中 ,该核心网设置成与该目的 eBTS为该移动终端建立该 A口连接后, 与该目的 eBTS进行该移动终端的语音数据的交互,或者与该源 eBTS及目的 eBTS分别进行该移动终端的语音数据的交互。
根据上述实施例, 本发明扁平化移动通信网络中的切换系统, 包括核心 网、 该切换的源 eBTS及目的 eBTS, 其中:
该源 eBTS设置成向该目的 eBTS发送切换请求消息, 并在收到该目的 eBTS发送的切换请求确认消息后, 指示该移动终端完成该切换;
该目的 eBTS设置成收到该切换请求消息后, 与该核心网进行交互并与 该核心网之间为该移动终端建立 A口连接后, 向该源 eBTS发送该切换请求 确认消息;
该核心网设置成与该目的 eBTS交互后建立该 A口连接。
其中的该核心网设置成与该目的 eBTS之间建立该 A口连接后, 与该目 的 eBTS进行该移动终端的语音数据的交互, 或者与该源 eBTS及目的 eBTS 分别进行该移动终端的语音数据的交互。
其中的该目的 eBTS设置成在该移动终端完成该切换后, 进一步指示该 源 eBTS释放用于该移动终端的资源,并通知该核心网释放与该源 eBTS用于 该移动终端的资源。 其中, 该源 eBTS设置成释放用于该移动终端的资源后, 进一步向该目的 eBTS报告完成了资源释放。 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。
虽然本发明所揭露的实施方式如上, 但所述的内容只是为了便于理解本 发明而采用的实施方式, 并非用以限定本发明。 任何本发明所属技术领域内 的技术人员, 在不脱离本发明所揭露的精神和范围的前提下, 可以在实施的 形式上及细节上作任何的修改与变化, 但本发明的专利保护范围, 仍须以所 附的权利要求书所界定的范围为准。

Claims

权 利 要 求 书
1、 一种扁平化移动通信网络的切换方法,用于完成所述扁平化移动通信 网络中的移动终端在增强型基站 (eBTS ) 间的切换, 该方法包括:
所述切换的源 eBTS向所述切换的目的 eBTS通知所述移动终端欲进行所 述切换;
所述目的 eBTS 与核心网进行交互后, 与所述核心网之间为所述移动终 端建立 A口连接;
所述目的 eBTS就所述通知向所述源 eBTS进行反馈;
所述源 eBTS指示所述移动终端完成所述切换。
2、 如权利要求 1所述的方法, 所述目的 eBTS与所述核心网进行所述交 互的步骤, 包括:
所述目的 eBTS向核心网发送信道请求消息;
所述核心网向所述目的 eBTS发送信道请求确认消息;
根据所述信道请求消息及信道请求确认消息为所述移动终端建立所述 A 口连接。
3、 如权利要求 2所述的方法, 其中:
所述信道请求消息携带基站侧 A口连接信息;
所述信道请求确认消息包括网络侧 A口连接信息;
根据所述基站侧 A口连接信息及网络侧 A口连接信息, 为所述移动终端 建立所述 A口连接。
4、 如权利要求 3所述的方法, 其中:
所述基站侧 A口连接信息包括所述目的 eBTS的地址信息;
所述网络侧 A口连接信息包括所述核心网的地址信息。
5、 如权利要求 1所述的方法, 其中:
所述核心网向所述目的 eBTS 之间建立所述 A 口连接后, 与所述目的 eBTS进行所述移动终端的语音数据的交互,或者与所述源 eBTS及目的 eBTS 分别进行所述移动终端的语音数据的交互。
6、 如权利要求 1所述的方法, 所述目的 eBTS在所述移动终端完成所述 切换后, 进一步指示所述源 eBTS释放用于所述移动终端的资源, 并通知所 述核心网释放与所述源 eBTS用于所述移动终端的资源。
7、 如权利要求 6所述的方法, 所述源 eBTS释放用于所述移动终端的资 源后, 进一步向所述目的 eBTS报告完成了资源释放。
8、 一种扁平化移动通信网络中的核心网,用于完成所述扁平化移动通信 网络中的移动终端在增强型基站 (eBTS ) 间的切换, 其中:
所述核心网设置成在与所述切换的目的 eBTS 进行交互后为所述移动终 端建立 A口连接。
9、 如权利要求 8所述的核心网, 其中:
在所述切换完成后根据所述目的 eBTS的通知释放与所述切换的源 eBTS 之间的用于所述移动终端的资源。
10、 如权利要求 8或 9所述的核心网, 其中:
所述核心网设置成与所述目的 eBTS为所述移动终端建立所述 A口连接 后, 与所述目的 eBTS 进行所述移动终端的语音数据的交互, 或者与所述切 换的源 eBTS及目的 eBTS分别进行所述移动终端的语音数据的交互。
11、 一种扁平化移动通信网络的切换系统, 用于完成所述扁平化移动通 信网络中的移动终端在增强型基站 (eBTS ) 间的切换, 该系统包括核心网、 所述切换的源 eBTS及目的 eBTS , 其中:
所述源 eBTS设置成向所述目的 eBTS通知所述移动终端欲进行所述切 换, 并在收到所述目的 eBTS 就所述通知的反馈后, 指示所述移动终端完成 所述切换;
所述目的 eBTS设置成收到所述通知后, 与所述核心网进行交互并与所 述核心网之间为所述移动终端建立 A 口连接, 并就所述通知向所述源 eBTS 进行所述反馈;
所述核心网设置成与所述目的 eBTS交互后建立所述 A口连接。
12、 如权利要求 11所述的系统, 其中:
所述核心网设置成与所述目的 eBTS之间建立所述 A口连接后, 与所述 目的 eBTS进行所述移动终端的语音数据的交互,或者与所述源 eBTS及目的 eBTS分别进行所述移动终端的语音数据的交互。
13、 如权利要求 11所述的系统, 其中:
所述目的 eBTS设置成在所述移动终端完成所述切换后, 进一步指示所 述源 eBTS释放用于所述移动终端的资源, 并通知所述核心网释放与所述源 eBTS用于所述移动终端的资源。
14、 如权利要求 13所述的系统, 其中:
所述源 eBTS设置成释放用于所述移动终端的资源后, 进一步向所述目 的 eBTS报告完成了资源释放。
PCT/CN2009/074320 2009-09-29 2009-09-29 一种扁平化移动通信网络的核心网、切换系统及方法 WO2011038543A1 (zh)

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CN1432258A (zh) * 2001-03-30 2003-07-23 诺基亚公司 用于支持无线电接入网间切换的方法
CN1984435A (zh) * 2005-12-12 2007-06-20 上海原动力通信科技有限公司 无线通信系统及其无线资源管理方法和小区切换方法
CN101374354A (zh) * 2007-08-20 2009-02-25 阿尔卡特朗讯公司 执行切换的方法
CN101543130A (zh) * 2006-10-04 2009-09-23 诺基亚公司 在移动通信系统中进行切换之时选择接入方法

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Publication number Priority date Publication date Assignee Title
CN1432258A (zh) * 2001-03-30 2003-07-23 诺基亚公司 用于支持无线电接入网间切换的方法
CN1984435A (zh) * 2005-12-12 2007-06-20 上海原动力通信科技有限公司 无线通信系统及其无线资源管理方法和小区切换方法
CN101543130A (zh) * 2006-10-04 2009-09-23 诺基亚公司 在移动通信系统中进行切换之时选择接入方法
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