WO2012089045A1 - 承载修改方法及设备 - Google Patents

承载修改方法及设备 Download PDF

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Publication number
WO2012089045A1
WO2012089045A1 PCT/CN2011/084281 CN2011084281W WO2012089045A1 WO 2012089045 A1 WO2012089045 A1 WO 2012089045A1 CN 2011084281 W CN2011084281 W CN 2011084281W WO 2012089045 A1 WO2012089045 A1 WO 2012089045A1
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Prior art keywords
bearer
network device
modified
request message
another network
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PCT/CN2011/084281
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English (en)
French (fr)
Inventor
刘世岳
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华为技术有限公司
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Publication of WO2012089045A1 publication Critical patent/WO2012089045A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/22Manipulation of transport tunnels

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a bearer modification method and device.
  • the call is likely to trigger bearer modification as needed.
  • the calling side bearer may be established before the called side, but in order to achieve the Transcoder Free Operation (TrFO), after the bearer on the called side is established, the bearer is carried by signaling. The information is reversely transmitted to the calling side, triggering the bearer modification on the calling side, so that the entire process uses the same bearer parameters, thereby achieving TrFO.
  • TrFO Transcoder Free Operation
  • the bearer needs to be modified due to business changes.
  • the existing bearer modification standard protocol process requires end-to-end node support, and the processes involved are complicated, for example, User Equipment (UE), Radio Access Network (RAN) side base station (NodeB), and The Radio Network Controller (RNC) and the Mobile Switch Center Server (MSC-S) and the Media Gateway (MGW) on the core network (Core Network) side all need support standards. protocol.
  • UE User Equipment
  • RAN Radio Access Network
  • NodeB NodeB
  • MSC-S Mobile Switch Center Server
  • MGW Media Gateway
  • 3G business has certain constraints.
  • Embodiments of the present invention provide a bearer modification method and device, and implement end-to-end node to 3G Support for modification.
  • An embodiment of the present invention provides a method for modifying a bearer, including:
  • the current call is kept, and a bearer release request message is sent to another network device, where the bearer release request message is used to instruct the another network device to release the established bearer;
  • the bearer setup request message is sent to another network device, where the bearer setup request message carries the modified bearer information, to indicate that the another network device is The modified bearer information establishes a bearer.
  • An embodiment of the present invention provides a bearer modification device, including:
  • the bearer translation and release module is configured to: after learning that the bearer needs to be modified, hold the current call, and send a bearer release request message to another network device, where the bearer release request message is used to indicate that the another network device is released.
  • Established bearer
  • a bearer establishing module configured to send a bearer setup request message to another network device after the other network device is learned to release the bearer that has been established, where the bearer setup request message carries the modified bearer information to indicate The other network device establishes a bearer according to the modified bearer information.
  • the embodiment of the present invention can replace the existing bearer modification process by using the bearer release process and the bearer setup process, and can implement a complicated process by using a simple process, and avoid the problem that the existing device does not support the modification of the standard bearer. .
  • FIG. 1 is a schematic flow chart of a method according to a first embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a method according to a second embodiment of the present invention
  • 3 is a schematic flow chart of a method according to a third embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a device according to a fourth embodiment of the present invention.
  • RAB setup three operations for assigning messages to a Radio Access Bearer (RAB) are defined: RAB setup, RAB modify, and RAB release.
  • RAB setup three operations for assigning messages to a Radio Access Bearer (RAB) are defined: RAB setup, RAB modify, and RAB release.
  • the bearer setup and bearer release the operation mode
  • the bearer modification is a higher-level operation that occurs with the development of the 3G network, which has the highest requirements on the system, and requires the UE, the NodeB, the RNC, and the MSC. Both need to support the standard bearer modification process.
  • the network element on the RAN side and the UE support the protocol are jagged. It is likely that some nodes do not support the standard bearer modification process.
  • the main idea of the embodiment of the present invention is to replace the bearer modification process with the bearer release process and the bearer setup process on the RAN side to avoid the problem that some nodes do not support the standard bearer modification process.
  • FIG. 1 is a schematic flowchart of a method according to a first embodiment of the present invention, including:
  • Step 1 1 After the core network element learns that the bearer needs to be modified, the current call is kept, and a bearer release request message is sent to another network device, where the bearer release request message is used to indicate that the other network device is released. The bearer that has been established.
  • the service corresponding to the current call may be a voice service or a data service.
  • the embodiment of the present invention can be applied to a scenario in which a signaling plane and a bearer plane are separated. In this scenario, the present invention The application only modifies the bearer process, and does not modify the signaling process used for the call. This keeps the existing established call and ensures that the bearer is modified while the call is not interrupted.
  • the bearer may be modified during call setup, or it may be modified while the call is in progress.
  • the bearer needs to be modified; or, when receiving the message sent by the user equipment for modifying the service, it is learned that the bearer needs to be modified.
  • the network device of the core network has a high degree of support for the standard process, and the access network side has poor support for the standard protocol. Therefore, in the embodiment of the present invention, the other network device may be special. Control the device for the access network.
  • the embodiment of the present invention can also be applied to the core network element, so the other network device can also be another core network element.
  • Step 12 The core network element sends a bearer setup request message to the another network device, and the bearer setup request message carries the modified bearer information, after the bearer of the other network device is learned. Instructing the another network device to establish a bearer according to the modified bearer information.
  • the access network control device learns that the access network control device releases the established bearer.
  • the modified bearer information may be the codec information corresponding to the called party.
  • the modified bearer information may be the modified service.
  • Corresponding Bearer Capability (BC) Corresponding Bearer Capability
  • the embodiment may be applied to a 3G network.
  • the core network element may be an MSC or an MSC-S.
  • the access network control device in this embodiment may be an RNC.
  • the embodiment of the present invention is not limited to the 3G network.
  • the corresponding access network control device and the core network element may be used.
  • the core network element is a mobility management entity (Mobile) Management Entity, MME ).
  • the bearer modification is performed on the basis of the current call, which can avoid the interruption of the current call, improve the establishment speed of the corresponding service after the bearer modification, and reduce the impact of the delay on the user experience.
  • bearer modification may occur during call setup, it may also occur during call progress. Therefore, the flow corresponding to the above case is separately described below.
  • FIG. 2 is a schematic flowchart of a method according to a second embodiment of the present invention.
  • a bearer needs to be modified when a call is established.
  • the codec list supported by the calling party is x, w, v, y, z
  • the codec list supported by the called party is v, x, z.
  • this embodiment includes:
  • Step 21 The calling party UE uses the codec X to establish a bearer with the calling party RNC and the calling party MSC.
  • the process of establishing a bearer can be implemented by using a normal bearer establishment process.
  • Step 22 The calling party MSC sends an initial address message to the called party ( Initial Address
  • the called party may be specifically the called party MSC; if the calling party UE and the called party UE are under the jurisdiction of the same MSC, The called party can be specifically called the called party RNC.
  • Step 23 The called party selects a codec in the codec list, and carries the selected codec in an Application Transport Mechanism (APM) message. Give the calling party MSC.
  • API Application Transport Mechanism
  • Step 24 The calling party MSC changes the end office codec to v.
  • the step is mainly that the MSC instructs the MGW to modify the bearer resource on the MGW.
  • the end bearer needs to modify the bearer on the entire bearer path. Therefore, the MGW needs to modify the bearer.
  • Step 25 The calling party MSC sends a message for releasing the bearer to the calling party RNC, that is, a bearer release request message, such as an assignment message ASSIGNMENT REQ (RAB Release).
  • a bearer release request message such as an assignment message ASSIGNMENT REQ (RAB Release).
  • Step 26 The calling party RNC translates the established bearer, and sends a response message corresponding to the message for releasing the bearer to the calling MSC after the translation, for example, ASSIGNMENTREQ RSP.
  • Step 27 The calling party MSC sends a message for establishing a bearer to the calling party RNC, that is, a bearer setup request message, which carries the modified codec V.
  • Step 28 The calling party RNC sends a response message corresponding to the message for establishing the bearer to the calling MSC, such as ASSIGNMENT REQ RSP.
  • Step 29 The calling party and the called party communicate via the newly established bearer.
  • the bearer after the bearer needs to be modified in the call setup, the bearer is first released, and then the bearer is established by using the new codec, and the existing modification process is replaced by the translation process and the new process, because the bearer setup and the bearer release are communication.
  • the basic functions of the system's devices can reduce the requirements on the device and smoothly support the bearer modification.
  • FIG. 3 is a schematic flowchart of a method according to a third embodiment of the present invention, where the call is in progress Modify the bearer as an example.
  • the service first is established between the calling UE and the called UE, and then, after a certain time, the calling UE wants to modify the service ⁇ 1 to the service ⁇ 2. For example, the UE first performs a video call service. The subsequent voice call service is required. Since different services require different bearers, the bearer needs to be modified at this time.
  • the bearers corresponding to different services can be characterized by BC, that is, the BCs corresponding to different services are different, and the network elements can also establish different bearers according to different BCs. Referring to FIG. 3, this embodiment includes:
  • Step 31 The calling party establishes a bearer with the called party by using BC ⁇ 1, and performs a service corresponding to BC ⁇ 1.
  • the process of establishing a bearer can be implemented by using a normal bearer establishment process.
  • Step 32 When the calling party needs to change the service, the calling party UE sends the calling party through the calling party RNC.
  • the MSC sends a modified (MODIFY) message, which carries the BC corresponding to the modified service, and is assumed to be
  • Step 33 The calling party MSC and the called party perform a bearer modification process.
  • the core network element supports the standard bearer modification process. Therefore, the core network of the calling party and the called party The usual standard bearer modification process can be used between the elements. This step can implement bearer modification on the calling party MSC and the called party's core network gateway.
  • the process of re-establishing and re-establishing the embodiment shown in the embodiment of the present invention may be adopted.
  • the following describes the modification process by using the calling party as an example.
  • the modification process between the called party's core network and the access network and the UE can be referred to.
  • modification process of the pre-translation and re-establishment shown in the embodiment of the present invention may also be adopted between the core network elements.
  • Step 34 The calling party MSC sends a message for releasing the bearer to the calling party RNC, that is, a bearer release request message, such as an assignment message ASSIGNMENT REQ (RAB Release).
  • a bearer release request message such as an assignment message ASSIGNMENT REQ (RAB Release).
  • Step 35 The calling party RNC translates the established bearer, and sends a response message corresponding to the message for releasing the bearer to the calling party MSC after the translation, for example, ASSIGNMENTREQ RSP.
  • Step 36 The calling party MSC sends a message for establishing a bearer to the calling party RNC, that is, bearer construction.
  • a request message which carries the modified service attribute BC ⁇ 2.
  • the message used to establish the bearer can be ASSIGNMENT REQ ( RAB SETUP BC ⁇ 2 ).
  • Step 37 The calling party RNC sends a response message corresponding to the message for establishing the bearer to the calling MSC, such as ASSIGNMENT REQ RSP.
  • Step 38 The calling party and the called party communicate with the newly established bearer, for example, the service corresponding to BC ⁇ 2.
  • the bearer after the bearer needs to be modified, the bearer is first released, and then the new BC is used to establish the bearer, and the existing modification process is replaced by the translation process and the new process, because the bearer establishment and the bearer release are communication systems.
  • the basic functions of the device therefore, can reduce the requirements on the device and smoothly support the bearer modification.
  • the bearer translation module 41 is configured to maintain the current service after learning that the bearer needs to be modified, and to another The network device sends a bearer release request message, where the bearer release request message is used to indicate that the another network device is to release the established bearer, and the bearer establishing module 42 is configured to learn that the another network device decrypts the already established bearer. Then, the bearer setup request message is sent to the other network device, where the bearer setup request message carries the modified bearer information, to indicate that the another network device establishes a bearer according to the modified bearer information.
  • the device may be a core network mobility management device, and the other network device may be an access network control device, for example, the device is an MSC, an MSC-S, and the access network control device is an RNC; or, the device For the eNodeB, the access network control device is an MME.
  • the bearer translation module 41 is specifically configured to: when the codec of the calling party and the called party are inconsistent in the call setup process, the bearer needs to be modified.
  • the modified bearer letter carried in the bearer setup request message sent by the bearer setup module 42 The information is: The codec information corresponding to the called party.
  • the bearer translation module 41 is specifically configured to: when receiving the message sent by the user equipment for modifying the service, know that the bearer needs to be modified.
  • the modified bearer information carried in the bearer setup request message sent by the bearer setup module 42 is: BC corresponding to the modified service.
  • the bearer establishing module 42 may be configured to receive, when the bearer release response message corresponding to the bearer release request message sent by the another network device after the bearer is successfully released, A network device translates an already established bearer.
  • the bearer modification is performed on the basis of the current call, which can avoid the interruption of the current call, improve the establishment speed of the corresponding service after the bearer modification, and reduce the impact of the delay on the user experience.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Computer Networks & Wireless Communication (AREA)
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Description

承载修改方法及设备 本申请要求于 2010 年 12 月 29 日提交中国专利局、 申请号为 201010612874. 4 , 发明名称为 "承载修改方法及设备" 的中国专利申请的优先 权, 其全部内容通过引用结合在本申请中。 技术领域
本发明实施例涉及通信技术, 尤其涉及一种承载修改方法及设备。
背景技术
在 3G呼叫建立过程中或者在 3G呼叫接通后进入稳态, 呼叫有可能会根 据需要触发承载修改。 其中, 在呼叫建立过程中, 可能是主叫侧承载先于被叫 侧建立, 但是为了达到编解码无关操作 (Transcoder Free Operation, TrFO ), 被叫侧的承载建立完成后, 通过信令将承载信息反向传递到主叫侧, 触发主叫 侧的承载修改, 使全流程使用相同的承载参数, 从而达到 TrFO。 在呼叫接通 后, 可能是由于业务变更导致承载需要修改。
现有承载修改标准协议流程需要端到端的节点支持,并且涉及的流程较复 杂,例如,用户设备( User Equipment, UE )、无线接入网( Radio Access Network, RAN )侧的基站( NodeB )和无线网络控制器( Radio Network Controller, RNC ) 以及核心网 (Core Network, CN )侧的移动交换中心服务器(Mobile Switch Center Server, MSC-S )和媒体网关( Media Gateway, MGW ), 都需要支持标 准协议。
但是, 在实际应用中, 有可能会有部分网元达不到要求, 尤其是 RAN侧 的网元和 UE很可能不完全支持 3G承载修改标准协议, 从而不能支持 3G的 承载修改, 因此对开展 3G业务有一定的约束。
发明内容
本发明实施例是提供一种承载修改方法及设备, 实现端到端节点对 3G承 载修改的支持。
本发明实施例提供了一种承载修改方法, 包括:
在获知需要修改承载后, 保持当前呼叫, 并向另一网络设备发送承载译放 请求消息, 所述承载译放请求消息用于指示所述另一网络设备释放已经建立的 承载;
在获知所述另一网络设备译放已经建立的承载后, 向另一网络设备发送承 载建立请求消息, 所述承载建立请求消息中携带修改后的承载信息, 以指示所 述另一网络设备根据所述修改后的承载信息建立承载。 本发明实施例提供一种承载修改设备, 包括:
承载译放模块, 用于在获知需要修改承载后, 保持当前呼叫, 并向另一网 络设备发送承载译放请求消息, 所述承载译放请求消息用于指示所述另一网络 设备译放已经建立的承载;
承载建立模块, 用于在获知所述另一网络设备译放已经建立的承载后, 向 另一网络设备发送承载建立请求消息, 所述承载建立请求消息中携带修改后的 承载信息 , 以指示所述另一网络设备根据所述修改后的承载信息建立承载。
由上述技术方案可知, 本发明实施例通过用承载译放流程和承载建立流程 替代现有的承载修改流程, 可以用简单的流程实现复杂的流程, 避免现有设备 对标准承载修改的不支持问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施 例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下面描 述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出 创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明第一实施例的方法流程示意图;
图 2为本发明第二实施例的方法流程示意图; 图 3为本发明第三实施例的方法流程示意图;
图 4为本发明第四实施例的设备结构示意图。
具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发明 实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中 的实施例, 本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其 他实施例, 都属于本发明保护的范围。
在 3GPP中, 定义了对无线接入承载( Radio Access Bearer, RAB )的指 配消息的三种操作: 承载建立(RAB setup ) 、 承载修改(RAB modify )和承 载释放(RAB release ) 。 在这三种操作中, 承载建立和承载释放 本操作 模式, 而承载修改是随着 3G网络的发展而出现的较高级别的操作, 其对系统 的要求最高, 需要 UE、 NodeB、 RNC 、 MSC都需要支持标准承载修改流程。 但是, 由于 RAN侧网元和 UE的数量较多, 而且这部分节点存在分步建设逐步 演进的场景, 特别是, 可能存在各种版本的 UE。 因此, RAN侧的网元以及 UE 对协议的支持存在参差不齐的状况, 很可能部分节点不支持标准承载修改流 程。
因此,本发明实施例的主要思想是在 RAN侧用承载译放流程和承载建立流 程替代承载修改流程, 以避免部分节点不支持标准的承载修改流程的问题。
图 1为本发明第一实施例的方法流程示意图, 包括:
步骤 1 1 : 核心网网元在获知需要修改承载后, 保持当前呼叫, 并向另一网 络设备发送承载译放请求消息, 所述承载译放请求消息用于指示所述另一网络 设备译放已经建立的承载。
其中, 当前呼叫 (call )对应的业务可以为语音业务, 也可以为数据业务。 本发明实施例可以应用于信令面和承载面分离的场景, 在该场景下, 本发明实 施例只是对承载流程进行修改, 对于呼叫采用的信令流程不进行修改, 这样可 以保持原有已经建立的呼叫, 保证在呼叫不中断的同时对承载进行修改。
例如, 呼叫建立过程中可能修改承载, 或者, 在呼叫进行中也可能修改承 载。
具体地, 如, 在呼叫建立过程中, 主叫方和被叫方的编解码不一致时, 获 知需要修改承载; 或者, 接收到用户设备发送的用于修改业务的消息时, 获知 需要修改承载。
另夕卜, 特别地, 由于通常核心网网元对标准流程的支持度较高, 而接入网 侧对标准协议的支持较差, 因此, 本发明实施例中, 该另一网络设备可以特别 为接入网控制设备。 当然, 本发明实施例也可以应用于核心网网元之间, 因此 该另一网络设备也可以为另一核心网网元。
步骤 12: 核心网网元在获知所述另一网络设备译放已经建立的承载后, 向 所述另一网络设备发送承载建立请求消息 , 所述承载建立请求消息中携带修改 后的承载信息, 以指示所述另一网络设备根据所述修改后的承载信息建立承 载。
例如, 接收到所述接入网控制设备在承载译放成功后, 发送的与所述承载 译放请求消息对应的承载释放响应消息时, 获知所述接入网控制设备释放已经 建立的承载。
另外, 在呼叫建立过程中需要修改承载时, 该修改后的承载信息可以为被 叫方对应的编解码信息; 在呼叫进行中需要修改承载时, 该修改后的承载信息 可以为修改后的业务对应的承载能力 (Bearer capability, BC ) 。
本实施例可以应用于 3G网络中, 在 3G网络中, 该核心网网元可以为 MSC 或者 MSC-S, 本实施例中的接入网控制设备可以为 RNC。 当然, 本发明实施 例也不限于 3G网络, 对于其他网络可以采用对应的接入网控制设备及核心网 网元, 例如, 对于长期演进( Long Term Evolution, LTE ) 系统, 该接入网控 制设备为演进基站 ( eNodeB ) , 该核心网网元为移动管理实体 ( Mobile Management Entity, MME ) 。
本实施例通过用承载译放流程和承载建立流程替代现有的承载修改流程, 可以用简单的流程实现复杂的流程,避免现有设备对标准承载修改的不支持问 题。 另外, 本实施例在保持当前呼叫的基石出上进行承载修改, 可以避免当前呼 叫的中断, 提高承载修改后对应的业务的建立速度, 降低延时对用户体验的影 响。
由于承载修改可能发生在呼叫建立时, 也可能发生在呼叫进行中, 因此, 下面分别描述对应上述情况下的流程。
图 2为本发明第二实施例的方法流程示意图, 本实施例以呼叫建立时需要 修改承载为例。 本实施例中, 假设主叫方支持的编解码列表为 x、 w、 v、 y、 z, 被叫方支持的编解码列表为 v、 x、 z。 在主叫方发起呼叫时, 首先采用 X建立承 载。 之后, 在与被叫方建立承载时, 被叫方首选的编解码为v。 由于后续采用 的编解码(V ) 与已经建立的承载对应的编解码(X ) 不同, 并且, 在 TrFO的 场景下, 由于 TrFO中需要尽量避免使用编解码转换(Transcoder ) , 因此需 要更改已经建立的承载, 将承载修改为与 V对应。
参见图 2, 本实施例包括:
步骤 21: 主叫方 UE采用编解码 X与主叫方 RNC及主叫方 MSC建立承载。 具体建立承载的过程可以采用通常的承载建立流程实现。
步骤 22 : 主叫方 MSC向被叫方发送初始地址消息 ( Initial Address
Message, ΙΑΜ ) , 其中携带主叫方支持的编解码列表 available codec list=x、 w、 v、 y、 z。
如果主叫方 UE和被叫方 UE位于不同的 MSC的管辖下, 则该被叫方可以具 体为被叫方 MSC; 如果主叫方 UE和被叫方 UE位于同一个 MSC的管辖下, 则该 被叫方可以具体为被叫方 RNC。
步骤 23: 被叫方在该编解码列表中选择一个编解码, 并将该选择的编解码 携带在应用传输机制 ( Application Transport Mechanism, APM )消息中返回 给主叫方 MSC。
列: ¾口, 被叫方支持的编解码歹 'J表为 supported codec list=v、 x、 z, 并且 v 的优先级最高, 则该选择的编解码为 v。
步骤 24: 主叫方 MSC将端局编解码修改为 v。
其中, 该步骤主要是指 MSC指示 MGW修改 MGW上的承载资源, 由于端 到端的承载修改时需要整个承载通路上同步修改, 因此, 需要 MGW上也需要 修改承载。
步骤 25: 主叫方 MSC向主叫方 RNC发送用于译放承载的消息, 即承载释 放请求消息, 例如指配消息 ASSIGNMENT REQ ( RAB Release ) 。
步骤 26: 主叫方 RNC译放已经建立的承载, 并在译放后向主叫方 MSC发 送与用于释放承载的消息对应的响应消息, 例如 ASSIGNMENTREQ RSP。
步骤 27: 主叫方 MSC向主叫方 RNC发送用于建立承载的消息, 即承载建 立请求消息, 其中携带修改后的编解码 V。
例如, 该用于建立承载的消息可以为 ASSIGNMENT REQ ( RAB SETUP 非接入层( Non-Access Stratum, NAS )同步指示标识 ( NAS Synchronization Indicator, NSI ) =v ) 。
步骤 28: 主叫方 RNC向主叫方 MSC发送与该用于建立承载的消息对应的 响应消息, 例如 ASSIGNMENT REQ RSP。
步骤 29: 主叫方和被叫方通过新建立的承载通信。
当然, 可以理解的是, 在实际呼叫建立过程中还可以包括其他的步骤, 该 其他的步骤可以参见通常的呼叫建立流程。
本实施例通过在呼叫建立时需要修改承载后, 首先译放承载, 之后采用新 的编解码建立承载, 通过译放流程及新建流程替代现有的修改流程, 由于承载 建立和承载译放是通信系统的设备具有的基本功能, 因此, 可以降低对设备的 要求, 顺利实现对承载修改的支持。
图 3为本发明第三实施例的方法流程示意图, 本实施例以呼叫进行中需要 修改承载为例。 本实施例中, 假设主叫 UE与被叫 UE之间首先建立业务 ~1 , 之 后, 在一定时间后, 主叫 UE希望将业务 ~1修改为业务 ~2, 例如, UE首先进行 视频通话业务, 后续需要进行语音通话业务。 由于不同业务需要不同的承载, 此时需要修改承载。 另外, 不同的业务对应的承载可以用 BC表征, 即请求不 同的业务时对应的 BC不同, 网元也可以根据不同的 BC建立不同承载。 参见图 3, 本实施例包括:
步骤 31 : 主叫方采用 BC~1与被叫方建立承载, 进行与 BC~1对应的业务。 具体建立承载的过程可以采用通常的承载建立流程实现。
步骤 32: 当主叫方需要更改业务时, 主叫方 UE通过主叫方 RNC向主叫方
MSC发送修改(MODIFY ) 消息, 其中携带修改后的业务对应的 BC, 假设为
BC~2。
步骤 33: 主叫方 MSC与被叫方进行承载修改流程。
其中, 由于核心网网元的数量较少, 对协议的支持度较高, 因此可以认为 核心网网元是支持标准的承载修改流程的, 因此, 在主叫方和被叫方的核心网 网元之间可以采用通常的标准承载修改流程。该步骤可以实现主叫方 MSC和被 叫方的核心网网关上的承载修改。
对于核心网与接入网及 U E之间则可以采用本发明实施例所示的先译放再 建立的流程。下面以主叫方为例说明修改流程,被叫方的核心网与接入网及 UE 之间的修改流程可以参照执行。
当然,核心网网元之间也可以采用本发明实施例所示的先译放再建立的修 改流程。
步骤 34: 主叫方 MSC向主叫方 RNC发送用于译放承载的消息, 即承载释 放请求消息, 例如指配消息 ASSIGNMENT REQ ( RAB Release ) 。
步骤 35: 主叫方 RNC译放已经建立的承载, 并在译放后向主叫方 MSC发 送与用于释放承载的消息对应的响应消息, 例如 ASSIGNMENTREQ RSP。
步骤 36: 主叫方 MSC向主叫方 RNC发送用于建立承载的消息, 即承载建 立请求消息, 其中携带修改后的业务属性 BC~2。
例如, 该用于建立承载的消息可以为 ASSIGNMENT REQ ( RAB SETUP BC~2 ) 。
步骤 37: 主叫方 RNC向主叫方 MSC发送与该用于建立承载的消息对应的 响应消息, 例如 ASSIGNMENT REQ RSP。
步骤 38: 主叫方和被叫方通过新建立的承载通信, 例如, 进行与 BC~2对 应的业务。
当然, 可以理解的是, 在实际呼叫进行过程中还可以包括其他的步骤, 该 其他的步骤可以参见通常的呼叫进行流程。
本实施例通过在呼叫进行时需要修改承载后, 首先译放承载, 之后采用新 的 BC建立承载, 通过译放流程及新建流程替代现有的修改流程, 由于承载建 立和承载释放是通信系统的设备具有的基本功能, 因此, 可以降低对设备的要 求, 顺利实现对承载修改的支持。
图 4为本发明第四实施例的设备结构示意图, 包括承载译放模块 41和承载 建立模块 42;承载译放模块 41用于在获知需要修改承载后,保持当前进行的业 务, 并向另一网络设备发送承载释放请求消息, 所述承载释放请求消息用于指 示所述另一网络设备译放已经建立的承载;承载建立模块 42用于在获知所述另 一网络设备译放已经建立的承载后, 向另一网络设备发送承载建立请求消息, 所述承载建立请求消息中携带修改后的承载信息 , 以指示所述另一网络设备根 据所述修改后的承载信息建立承载。
其中, 该设备可以为核心网移动性管理设备, 该另一网络设备可以为接入 网控制设备, 例如, 该设备为 MSC、 MSC-S, 该接入网控制设备为 RNC; 或 者, 该设备为 eNodeB, 该接入网控制设备为 MME。
可以是, 所述当前进行的业务为呼叫业务, 所述承载译放模块 41具体用于 在呼叫建立过程中, 主叫方和被叫方的编解码不一致时, 获知需要修改承载。 所述承载建立模块 42发送的承载建立请求消息中携带的所述修改后的承载信 息为: 被叫方对应的编解码信息。
也可以是,所述承载译放模块 41具体用于接收到用户设备发送的用于修改 业务的消息时, 获知需要修改承载。 所述承载建立模块 42发送的承载建立请求 消息中携带的所述修改后的承载信息为: 修改后的业务对应的 BC。
另外 ,所述承载建立模块 42可以具体用于接收到所述另一网络设备在承载 译放成功后, 发送的与所述承载译放请求消息对应的承载译放响应消息时, 获 知所述另一网络设备译放已经建立的承载。
本实施例通过用承载译放流程和承载建立流程替代现有的承载修改流程, 可以用简单的流程实现复杂的流程,避免现有设备对标准承载修改的不支持问 题。 另外, 本实施例在保持当前呼叫的基石出上进行承载修改, 可以避免当前呼 叫的中断, 提高承载修改后对应的业务的建立速度, 降低延时对用户体验的影 响。
可以理解的是, 上述方法及设备中的相关特征可以相互参考。 另外, 上述 实施例中的 "第一" 、 "第二" 等是用于区分各实施例, 而并不代表各实施例 的优劣。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成, 前述的程序可以存储于计算机可读取存储 介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储介 质包括: ROM、 RAM , 磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限 制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员 应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的 本质脱离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求 书
1、 一种承载修改方法, 其特征在于, 包括:
在获知需要修改承载后, 保持当前呼叫, 并向另一网络设备发送承载译放 请求消息, 所述承载译放请求消息用于指示所述另一网络设备释放已经建立的 承载;
在获知所述另一网络设备译放已经建立的承载后, 向另一网络设备发送承 载建立请求消息, 所述承载建立请求消息中携带修改后的承载信息, 以指示所 述另一网络设备根据所述修改后的承载信息建立承载。
2、 根据权利要求 1所述的方法, 其特征在于, 所述另一网络设备为接入网 控制设备。
3、 根据权利要求 2所述的方法, 其特征在于, 所述获知需要修改承载, 包 括:
在呼叫建立过程中, 主叫方和被叫方的编解码不一致时, 获知需要修改承 载。
4、 根据权利要求 3所述的方法, 其特征在于, 所述修改后的承载信息为: 被叫方对应的编解码信息。
5、 根据权利要求 2所述的方法, 其特征在于, 所述获知需要修改承载, 包 括:
接收到用户设备发送的用于修改业务的消息时, 获知需要修改承载。
6、 根据权利要求 5所述的方法, 其特征在于, 所述修改后的承载信息为: 修改后的业务对应的承载能力。
7、 根据权利要求 1-6任一项所述的方法, 其特征在于, 所述获知所述另一 网络设备译放已经建立的承载, 包括:
接收到所述另一网络设备在承载译放成功后,发送的与所述承载译放请求 消息对应的承载译放响应消息时, 获知所述另一网络设备译放已经建立的承 载。
8、 一种承载修改设备, 其特征在于, 包括:
承载译放模块, 用于在获知需要修改承载后, 保持当前呼叫, 并向另一网 络设备发送承载译放请求消息, 所述承载译放请求消息用于指示所述另一网络 设备译放已经建立的承载;
承载建立模块, 用于在获知所述另一网络设备译放已经建立的承载后, 向 另一网络设备发送承载建立请求消息, 所述承载建立请求消息中携带修改后的 承载信息 , 以指示所述另一网络设备根据所述修改后的承载信息建立承载。
9、 根据权利要求 8所述的设备, 其特征在于, 所述设备为核心网移动性管 理设备, 所述另一网络设备为接入网控制设备。
10、 根据权利要求 9所述的设备, 其特征在于, 所述承载译放模块具体用 于在呼叫建立过程中,主叫方和被叫方的编解码不一致时,获知需要修改承载。
11、根据权利要求 10所述的设备, 其特征在于, 所述承载建立模块发送的 承载建立请求消息中携带的所述修改后的承载信息为: 被叫方对应的编解码信 息。
12、 根据权利要求 9所述的设备, 其特征在于, 所述承载译放模块具体用 于接收到用户设备发送的用于修改业务的消息时, 获知需要修改承载。
13、根据权利要求 12所述的设备, 其特征在于, 所述承载建立模块发送的 承载建立请求消息中携带的所述修改后的承载信息为: 修改后的业务对应的承 载能力。
14、 根据权利要求 8-13 任一项所述的设备, 其特征在于, 所述承载建立 模块具体用于接收到所述另一网络设备在承载译放成功后,发送的与所述承载 译放请求消息对应的承载释放响应消息时, 获知所述另一网络设备译放已经建 立的承载。
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