TW202046775A - Methods for avoiding network fallbacks of a user equipment - Google Patents
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- H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
- H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
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Abstract
Description
本申請總體上涉及無線通信,並且更具體地,涉及避免用戶設備(User Equipment,UE)執行網絡回退(fallback)的方法。This application generally relates to wireless communication, and more specifically, relates to a method for preventing a user equipment (User Equipment, UE) from performing a network fallback.
在典型的移動通信環境中,用戶設備(UE)(也稱為移動台(Mobile Station,MS)),例如移動電話(也稱為蜂窩電話或手機)或具有無線通信能力的平板個人計算機(PC)可以與一個或複數個服務網絡通信語音和/或資料信號。 UE和服務網絡之間的無線通信可以使用各種無線電接入技術(Radio Access Technology,RAT)來執行,例如全球移動通信系統(GSM)技術,通用封包無線電服務(GPRS)技術,增強資料速率的全球演進技術(Enhanced Data rates for Global Evolution,EDGE),寬帶碼分多址(WCDMA)技術,碼分多址2000(CDMA-2000)技術,時分同步碼分多址(TD-SCDMA)技術,微波訪問全球互通(WiMAX)技術,長期演進(LTE)技術,先進的(advanced)LTE(LTE-A)技術等。特別地,GSM / GPRS / EDGE技術也稱為2G技術;WCDMA / CDMA-2000 / TD-SCDMA技術也稱為3G技術;LTE / LTE-A / TD-LTE技術也稱為4G技術。In a typical mobile communication environment, user equipment (UE) (also known as mobile station (Mobile Station, MS)), such as a mobile phone (also known as a cellular phone or cell phone) or a tablet personal computer (PC) with wireless communication capabilities ) Can communicate voice and/or data signals with one or more service networks. The wireless communication between the UE and the service network can be performed using various radio access technologies (Radio Access Technology, RAT), such as Global System for Mobile Communications (GSM) technology, General Packet Radio Service (GPRS) technology, and global data rate enhancement Evolution technology (Enhanced Data rates for Global Evolution, EDGE), wideband code division multiple access (WCDMA) technology, code division multiple access 2000 (CDMA-2000) technology, time division synchronous code division multiple access (TD-SCDMA) technology, microwave Access WiMAX technology, long-term evolution (LTE) technology, advanced LTE (LTE-A) technology, etc. In particular, GSM / GPRS / EDGE technology is also called 2G technology; WCDMA / CDMA-2000 / TD-SCDMA technology is also called 3G technology; LTE / LTE-A / TD-LTE technology is also called 4G technology.
這些RAT技術已經被用於各種電信標準中,以提供使不同的無線設備能夠在市政,國家,地區,甚至全球水準上進行通信的通用協議。新興電信標準的一個示例是5G新無線電(New Radio,NR)。5G NR是第三代合作夥伴計劃(3GPP)頒布的LTE移動標準的一組增強功能。它旨在通過提高頻譜效率,降低成本和改善服務來更好地支持移動寬帶互聯網接入(internet access)。These RAT technologies have been used in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at municipal, national, regional, and even global levels. An example of an emerging telecommunications standard is 5G New Radio (NR). 5G NR is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). It aims to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs and improving services.
根據符合5G NR技術的3GPP規範和/或要求,如果5G網絡支持基於封包交換(Packet Switched,PS)會話的IP多媒體子系統(IP Multimedia Subsystem,IMS)語音(IMS voice over PS session),但由於某些原因無法如常地(natively)提供所述IMS呼叫服務,駐留在5G網絡上的UE可以由5G網絡觸發而回退到4G網絡以接收移動終端被呼叫(Mobile Terminated,MT)語音呼叫。但是,在某些情況下,UE可能正在執行要求操作期間UE保持與5G網絡的連接的關鍵操作(critical operation)。結果,UE回退到4G網絡可能會導致與5G網絡斷開連接並影響所述關鍵操作。According to the 3GPP specifications and/or requirements that comply with 5G NR technology, if the 5G network supports IP Multimedia Subsystem (IMS) voice over PS session based on Packet Switched (PS) sessions, but due to For some reasons, the IMS call service cannot be provided natively. The UE camping on the 5G network can be triggered by the 5G network and fall back to the 4G network to receive the mobile terminal called (Mobile Terminated, MT) voice call. However, in some cases, the UE may be performing a critical operation that requires the UE to maintain a connection with the 5G network during the operation. As a result, the UE falling back to the 4G network may cause disconnection from the 5G network and affect the critical operation.
為瞭解決上述問題,本申請提出了配置UE和/或服務網絡(例如5G網絡)的特定方式以避免UE執行網絡回退(例如,不執行UE到傳統網絡(例如4G)的回退)。In order to solve the above problems, this application proposes a specific way to configure the UE and/or the serving network (eg 5G network) to prevent the UE from performing network fallback (eg, not performing the fallback from the UE to the traditional network (eg 4G)).
在本申請的一個方面,提供了一種由通信地連接到使用第一無線接入技術(RAT)的第一第三代合作夥伴計劃(3GPP)網絡的UE執行的方法。所述方法包括以下步驟:從所述第一3GPP網絡接收消息,所述消息指示所述第一3GPP網絡支持基於封包交換(PS)會話的IP多媒體子系統(IMS)語音;響應於接收到指示所述第一3GPP網絡支持所述基於PS會話的IMS語音的所述消息,向所述第一3GPP網絡提供所述UE到使用第二RAT的第二3GPP網絡的回退被禁用(disabled)的指示。In one aspect of the present application, there is provided a method performed by a UE communicatively connected to a first third generation partnership project (3GPP) network using a first radio access technology (RAT). The method includes the following steps: receiving a message from the first 3GPP network, the message indicating that the first 3GPP network supports IP Multimedia Subsystem (IMS) voice based on a packet switching (PS) session; in response to receiving the instruction The first 3GPP network supports the message of the PS session-based IMS voice, and provides the first 3GPP network with the UE that the fallback of the UE to the second 3GPP network using the second RAT is disabled (disabled) Instructions.
在本申請的另一個方面,提供了一種由第一3GPP網絡執行的方法,所述第一3GPP網絡使用第一RAT並通信地連接到UE。所述方法包括以下步驟:向UE發送消息,所述消息指示所述第一3GPP網絡支持基於PS會話的IMS語音;響應於所述第一3GPP網絡支持所述基於PS會話的IMS語音,允許來自UE的IMS註冊;並且響應於啟動對所述UE的呼入呼叫(incoming call)而提供所述呼入呼叫將在使用第二RAT的第二3GPP網絡中建立的指示。In another aspect of the present application, there is provided a method performed by a first 3GPP network that uses a first RAT and is communicatively connected to a UE. The method includes the following steps: sending a message to the UE, the message indicating that the first 3GPP network supports PS session-based IMS voice; in response to the first 3GPP network supporting the PS session-based IMS voice, allowing users from IMS registration of the UE; and in response to initiating an incoming call to the UE, an indication that the incoming call will be established in the second 3GPP network using the second RAT is provided.
通過閱讀以下避免UE回退到傳統網絡的方法的具體實施方式的描述,本申請的其他方面和特徵對於所屬技術領域具有通常知識者將變得顯而易見。By reading the following description of the specific implementation of the method for preventing the UE from falling back to the traditional network, other aspects and features of the present application will become obvious to those with ordinary knowledge in the technical field.
以下描述是出於說明本申請的一般原理的目的,並且不應以限制意義來理解。應當理解,實施例可以以軟件,硬體,固件或其任何組合來實現。當在本文中使用時,術語“包括”,“含有”,“包含”和/或“具有”指定存在所述特徵,整數,步驟,操作,元件和/或組件,但不排除存在或添加一個或複數個其他特徵,整數,步驟,操作,元件,組件和/或它們的組合。The following description is for the purpose of explaining the general principle of the present application, and should not be understood in a limiting sense. It should be understood that the embodiments may be implemented in software, hardware, firmware or any combination thereof. When used herein, the terms "including", "containing", "comprising" and/or "having" designate the presence of the described features, integers, steps, operations, elements and/or components, but do not exclude the presence or addition of one Or a plurality of other features, integers, steps, operations, elements, components and/or combinations thereof.
第1圖是根據本申請的實施例的無線通信環境的框圖。Figure 1 is a block diagram of a wireless communication environment according to an embodiment of the present application.
如第1圖所示,無線通信環境100包括用戶設備(UE)110以及兩個3GPP網絡120和130。As shown in Figure 1, the
UE 110可以是功能電話,智慧電話,平板個人計算機(PC),膝上型計算機或支持3GPP網絡120和130使用的RAT的任何無線通信設備。UE110可以與3GPP網絡120和130中的一個或兩個進行無線通信。The UE 110 may be a feature phone, a smart phone, a tablet personal computer (PC), a laptop computer, or any wireless communication device that supports the RAT used by the
具體地,3GPP網絡120使用的RAT比3GPP網絡130使用的RAT更先進。也就是說,3GPP網絡120是比3GPP網絡130更先進的網絡(例如,可將3GPP網絡120稱之為先進的網絡,將3GPP網絡130稱之為傳統的網絡)。Specifically, the RAT used by the
例如,3GPP網絡120可以是5G網絡(例如,NR網絡),3GPP網絡130可以是4G網絡(例如,LTE / LTE-A / TD-LTE網絡)或3G網絡(例如WCDMA / CDMA-2000 / TD-SCDMA網絡)或2G網絡(例如,GSM / GPRS / EDGE網絡)。For example, the
具體地,3GPP網絡120包括接入網絡121和核心網絡122,而3GPP網絡130包括接入網絡131和核心網絡132。接入網絡121和131負責處理無線電信號,終止無線協議,並且將UE 110分別與核心網絡122和132連接。核心網絡122和132負責執行移動性管理,網絡側認證,並與公共/外部網絡(例如,互聯網)交互。Specifically, the
接入網絡121和131以及核心網絡122和132可以各自包括一個或複數個用於執行所述功能的網絡節點。例如,如果3GPP網絡120是NR網絡,則接入網絡121可以是至少包括gNB或發送接收點(Transmission Reception Point,TRP)的下一代無線接入網絡(NG-RAN),並且核心網絡122可以是包括各種網絡功能的下一代核心網絡(NG-CN),所述各種網絡功能包括接入和移動功能(Access and Mobility Function,AMF),會話管理功能(Session Management Function,SMF),策略控制功能(Policy Control Function,PCF),應用程式功能(Application Function,AF),身份驗證服務器功能(Authentication Server Function,AUSF),用戶平面功能(User Plane Function,UPF)和用戶資料管理(User Data Management,UDM),其中每個網絡功能都可以實現為專用硬體上的網絡元素,也可以實現為在專用硬體上運行的軟件實例,也可以為在適當的平臺(例如雲基礎架構)上實例化的虛擬化功能。The
AMF提供基於UE的認證,授權,移動性管理等。SMF負責會話管理並向UE分配互聯網協議(IP)地址。SMF還選擇並控制用於資料傳輸的UPF。如果UE具有複數個會話,則可以將不同的SMF分配給每個會話以分別管理它們,並且可能為每個會話提供不同的功能。AMF provides UE-based authentication, authorization, mobility management, etc. SMF is responsible for session management and assigns Internet Protocol (IP) addresses to UEs. SMF also selects and controls the UPF used for data transmission. If the UE has multiple sessions, different SMFs can be assigned to each session to manage them separately, and different functions may be provided for each session.
AF向負責策略控制的PCF提供封包流上的資訊,以支持服務質量(Quality of Service,QoS)。PCF根據所述資訊確定移動性和會話管理相關的策略,以使AMF和SMF正常運行。AUSF儲存對UE認證的資料,而UDM儲存UE的簽約資料(subscription data)。AF provides information on the packet flow to the PCF responsible for policy control to support Quality of Service (QoS). The PCF determines the mobility and session management-related strategies based on the information, so that AMF and SMF can operate normally. AUSF stores the data for UE authentication, while UDM stores the UE's subscription data.
例如,如果3GPP網絡130是LTE / LTE-A / TD-LTE網絡,則接入網絡131可以是至少包括演進型NB(eNB)(例如,宏eNB,毫微微eNB或微微eNB)的演進型UTRAN(E-UTRAN),並且核心網絡132可以是演進封包核心(Evolved Packet Core,EPC),所述EPC包括歸屬訂戶服務器(Home Subscriber Server,HSS),移動性管理實體(Mobility Management Entity,MME),服務網關(Serving Gateway,S- GW)和封包資料網絡網關(Packet Data Network Gateway,PDN-GW或P-GW)。For example, if the
備選地,如果3GPP網絡130是WCDMA網絡,則接入網絡121可以是通用陸地無線接入網絡(UTRAN),而核心網絡122可以是GPRS核心,所述GPRS核心包括歸屬位置寄存器(Home Location Register,HLR),至少一個服務GPRS支持節點(Serving GPRS Support Node,SGSN)和至少一個網關GPRS支持節點(Gateway GPRS Support Node,GGSN)。Alternatively, if the
更具體地,3GPP網絡120和130均支持基於封包交換(PS)會話的IP多媒體子系統(IMS)語音,並且3GPP網絡120支持回退過程,所述回退過程被執行以使UE 110從3GPP網絡120回退到3GPP網絡130以進行IP多媒體子系統(IMS)呼叫服務。例如,如果3GPP網絡120是NR網絡並且3GPP網絡130是LTE網絡,則將回退過程稱為演進封包系統(Evolved Packet System,EPS)回退。儘管未示出,但是3GPP網絡120和130中的每一個可以包括可以連接到核心網絡122/132或設置在核心網絡122/132中的IMS服務器。More specifically, the
然而,由於某些原因,3GPP網絡120可能無法如常地(natively)向UE 110提供IMS呼叫服務,因此引入本申請的方法以避免當UE 110正在執行關鍵操作時,UE 110從3GPP網絡120回退到3GPP網絡130。However, due to some reasons, the
應該理解的是,對無線通信環境100的描述僅出於說明性目的,並不旨在限製本申請的範圍。例如,如果6G技術支持UE 110從6G網絡回退到5G網絡,則3GPP網絡120可以是6G網絡,而3GPP網絡130可以是5G網絡。It should be understood that the description of the
第2圖是示出根據本申請的實施例的UE 110的框圖。Figure 2 is a block diagram showing UE 110 according to an embodiment of the present application.
UE 110可以包括無線收發器10,控制器20,儲存設備30,顯示設備40和輸入/輸出(I / O)設備50。The UE 110 may include a
無線收發器10被配置為執行與接入網絡121和/或接入網絡131之間的無線發送和接收。The
具體地說,無線收發器10可以包括基帶處理設備11,射頻(RF)設備12和天線13,其中天線13可以包括用於波束成形(beamforming)的一個或複數個天線。基帶處理設備11被配置為執行基帶信號處理並控制用戶標識卡(未示出)與RF設備12之間的通信。基帶處理設備11可以包含複數個硬體組件以執行基帶信號處理,所述處理包括類比數位轉換(ADC)/數位類比轉換(DAC),增益調整,調製/解調,編碼/譯碼等。RF設備12可以經由天線13接收RF無線信號,將接收的RF無線信號轉換為由基帶處理設備11處理的基帶信號,或者從基帶處理設備11接收基帶信號並將接收到的基帶信號轉換為RF無線信號,隨後再通過天線13發送。RF設備12還可以包含複數個硬體設備,以執行射頻轉換。例如,RF設備12可以包括混頻器,以將基帶信號與在支持的蜂窩技術的射頻中振蕩的載波相乘,其中,射頻可以是在3G(例如,WCDMA)系統中使用的900MHz,1900MHz或2100MHz,或者可以是在4G(例如LTE / LTE-A / TD-LTE)系統中使用的900MHz,2100MHz或2.6GHz,或者可以是在5G(例如,NR)系統中使用的任何射頻(例如,用於毫米波的30GHz〜300GHz)或其他射頻,其具體取決於所使用的RAT。Specifically, the
在另一個實施例中,無線收發器10可以包括複數組基帶處理設備, RF設備和天線,其中,每組基帶處理設備,RF設備和天線被配置為使用相應的RAT執行無線發送和接收。In another embodiment, the
控制器20可以是通用處理器,微控制單元(MCU),應用處理器,數位信號處理器(DSP),圖形處理單元(GPU),全息處理單元(HPU),神經處理單元(NPU)等,其包括用於提供資料處理和計算功能的各種電路,控制無線收發器10與接入網絡121和/或接入網絡131進行無線通信,使能儲存裝置30,並向儲存裝置30儲存資料和從儲存裝置30檢索資料,向顯示裝置40發送一系列幀資料(例如代表文本消息,圖形,圖像等),以及從I/ O設備50接收信號/向I/ O設備50輸出信號。The
特別地,控制器20協調無線收發器10,儲存設備30,顯示設備40和I / O設備50的前述操作,以執行避免UE 110回退到傳統網絡的方法。In particular, the
在另一個實施例中,控制器20可以被集成到基帶處理設備11中,以用作基帶處理器。In another embodiment, the
如所屬技術領域具有通常知識者將理解的,控制器20的電路通常將包括電晶體,所述電晶體被配置為根據本文描述的功能和操作來控制電路的操作。如將進一步理解的,電晶體的具體結構或互連通常將由諸如寄存器傳輸語言(RTL)編譯器的編譯器確定。RTL編譯器可以由處理器在與彙編語言代碼非常相似的腳本上進行操作,以將腳本編譯為用於最終電路佈局或製造的形式。確實,RTL以其在促進電子和數位系統設計過程中的作用和用途而聞名。As those with ordinary knowledge in the art will understand, the circuit of the
儲存設備30是非暫時性機器可讀儲存介質,包括諸如FLASH記憶體或非易失性隨機存取記憶體(NVRAM)之類的記憶體,或諸如硬盤或磁帶之類的磁儲存設備,光盤或它們的任意組合,用於儲存操作系統,應用程式,通信協議和/或本申請的方法的指令和/或程式代碼(或本申請的方法可以被實現為通信協議的一部分)。The
顯示設備40可以是液晶顯示器(LCD),發光二極管(LED)顯示器或電子紙顯示器(EPD)等,用於提供顯示功能。備選地,顯示設備40可以進一步包括一個或複數個佈置在其上或其下方的觸摸傳感器用於感測諸如手指或筆等物體的觸摸,接觸或近似操作。The
I / O設備50可以包括一個或複數個按鈕,鍵盤,鼠標,觸摸板,攝像機,麥克風和/或揚聲器等,以用作人機介面(MMI)與用戶進行交互,例如接收用戶輸入並向用戶輸出提示。The I/
應該理解,在第2圖的實施例中描述的組件僅用於說明目的,並且不旨在限製本申請的範圍。例如,UE 110可以包括更多組件,例如電源或全球定位系統(GPS)設備,其中,電源可以是向UE 110的所有其他組件供電的移動/可更換電池。GPS設備可以提供UE 110的位置資訊以用於某些基於位置的服務或應用。備選地,UE 110可以包括更少的組件。例如,UE 110可以不包括顯示設備40和/或I / O設備50。It should be understood that the components described in the embodiment of Figure 2 are for illustrative purposes only and are not intended to limit the scope of the present application. For example, the
第3圖是示出根據本申請的實施例的避免UE回退到傳統網絡的方法的流程圖。Figure 3 is a flow chart showing a method for preventing a UE from falling back to a traditional network according to an embodiment of the present application.
在該實施例中,避免UE向傳統網絡回退的方法被應用於UE(例如UE 110)並由UE執行。具體而言,UE通信地連接到使用先進的RAT(例如5G NR)的第一3GPP網絡(例如3GPP網絡120)。In this embodiment, the method for preventing the UE from falling back to the traditional network is applied to the UE (for example, the UE 110) and executed by the UE. Specifically, the UE is communicatively connected to a first 3GPP network (for example, 3GPP network 120) that uses an advanced RAT (for example, 5G NR).
首先,UE通過向第一3GPP網絡發送請求消息來向第一3GPP網絡註冊(步驟S310)。在一個實施例中,該請求消息可以是註冊請求(REGISTRATION REQUEST)消息。First, the UE registers with the first 3GPP network by sending a request message to the first 3GPP network (step S310). In an embodiment, the request message may be a registration request (REGISTRATION REQUEST) message.
在步驟S310之後,UE從第一3GPP網絡接收響應消息,所述響應消息指示第一3GPP網絡支持基於PS會話的IMS語音(步驟S320)。在一個實施例中,所述響應消息可以是註冊接受(REGISTRATION ACCEPT)消息。After step S310, the UE receives a response message from the first 3GPP network, the response message indicating that the first 3GPP network supports IMS voice based on the PS session (step S320). In an embodiment, the response message may be a registration acceptance (REGISTRATION ACCEPT) message.
在步驟S320之後,響應於接收到指示所述第一3GPP網絡支持基於PS會話的IMS語音的響應消息,UE向第一3GPP網絡提供UE到使用傳統的RAT的第二3GPP網絡的回退被禁用的指示(步驟S330),該方法結束。After step S320, in response to receiving the response message indicating that the first 3GPP network supports PS session-based IMS voice, the UE provides the first 3GPP network that the fallback of the UE to the second 3GPP network using the traditional RAT is disabled (Step S330), the method ends.
在一個實施例中,響應於檢測到IMS語音會話被啟動而向第一3GPP網絡提供UE到使用傳統的RAT的第二3GPP網絡的回退被禁用的指示。稍後將在第4圖中給出該實施例的細節。In one embodiment, in response to detecting that the IMS voice session is started, the first 3GPP network is provided with an indication that the fallback of the UE to the second 3GPP network using the traditional RAT is disabled. The details of this embodiment will be given in Figure 4 later.
在另一實施例中,可以當在第一3GPP網絡上執行IMS註冊時向第一3GPP網絡提供UE到使用傳統的RAT的第二3GPP網絡的回退被禁用的指示。稍後將在第5圖中給出該實施例的細節。In another embodiment, the first 3GPP network may be provided with an indication that the fallback of the UE to the second 3GPP network using the traditional RAT is disabled when the IMS registration is performed on the first 3GPP network. The details of this embodiment will be given in Figure 5 later.
第4圖是示出了根據第3圖的實施例的避免UE回退到傳統網絡的方法的消息序列圖。FIG. 4 is a message sequence diagram showing the method for preventing the UE from falling back to the traditional network according to the embodiment of FIG. 3.
在步驟S401中,UE 110向核心網絡122發送註冊請求消息以向3GPP網絡120註冊。In step S401, the
在步驟S402中,UE 110從核心網絡122接收註冊接受消息,其中所述註冊接受消息指示3GPP網絡120支持基於PS會話的IMS語音。In step S402, the
在步驟S403中,UE 110與3GPP網絡120建立一個或複數個無線電承載以執行關鍵操作。In step S403, the
具體地說,所述關鍵操作可以與諸如遊戲應用程式的低延遲通信(Low-Latency Communication,LLC)應用程式相關聯。Specifically, the key operation may be associated with a Low-Latency Communication (LLC) application such as a game application.
在步驟S404中,響應於UE 110被配置為“以語音為中心”並且3GPP網絡120支持基於PS會話的IMS語音, UE110將會話啟動協議(Session Initiation Protocol,SIP)註冊消息發送到3GPP網絡120的IMS服務器以註冊IMS呼叫服務。In step S404, in response to the
在步驟S405中,UE 110從3GPP網絡120的IMS服務器接收SIP 同意(SIP OK)消息以完成IMS註冊。In step S405, the
在步驟S406中,UE 110從3GPP網絡120的IMS服務器接收SIP 邀請(INVITE)消息,其中,SIP邀請消息指示對UE 110的呼入呼叫。In step S406, the
在步驟S407中,UE向3GPP網絡120的IMS服務器發送SIP 183消息,其中,SIP 183消息包括特徵帽頭(Feature-Caps header)欄位,其中Feature-Caps header欄位中存在特定標籤(tag)以提供UE 110到傳統3GPP網絡(例如,3GPP網絡130)的回退被禁用的指示。In step S407, the UE sends a SIP 183 message to the IMS server of the
例如,特定標籤可以是“g.3gpp.epsfb-forbid”標籤,“g.3gpp.epsfb-disallow”標籤,“g.3gpp.noepsfb”標籤或“g.3gpp.ps-fallback-forbid”標籤。For example, the specific tag may be a "g.3gpp.epsfb-forbid" tag, a "g.3gpp.epsfb-disallow" tag, a "g.3gpp.noepsfb" tag, or a "g.3gpp.ps-fallback-forbid" tag.
在步驟S408中,響應於3GPP網絡120不能如常地支持基於PS會話的IMS語音並且接收到包括UE110到傳統3GPP網絡(例如,3GPP網絡130)的回退被禁用的指示的SIP 183消息,3GPP網絡120的IMS服務器拒絕所述呼入呼叫。由於某些原因,3GPP網絡120可能不能如常地支持基於PS會話的IMS語音(即,EPS回退是唯一的選擇)。例如,當啟動對UE 110的呼入呼叫時3GPP網絡120的IMS服務器處於維護(maintenance)中,或者3GPP網絡120的運營商可能想要更頻繁地利用傳統3GPP網絡(例如, 3GPP網絡130)的IMS服務時。In step S408, in response to the
在另一個實施例中,如果在啟動對UE 110的呼入呼叫時,3GPP網絡120本地支持基於PS會話的IMS語音,則3GPP網絡120可以繼續進行呼叫建立過程。In another embodiment, if the
第5圖是示出根據第3圖的實施例的避免UE回退到傳統網絡的方法的另一消息序列圖。FIG. 5 is another message sequence diagram showing the method for preventing the UE from falling back to the traditional network according to the embodiment of FIG. 3.
在步驟S501中,UE 110向核心網絡122發送註冊請求消息以向3GPP網絡120註冊。In step S501, the
在步驟S502中,UE 110從核心網絡122接收註冊接受消息,其中所述註冊接受消息指示3GPP網絡120支持基於PS會話的IMS語音。In step S502, the
在步驟S503中,UE 110與3GPP網絡120建立一個或複數個無線電承載以執行關鍵操作。In step S503,
具體地說,所述關鍵操作可以與LLC應用程式(例如遊戲應用程式)相關聯。Specifically, the key operations may be associated with LLC applications (such as game applications).
在步驟S504中,響應於UE 110被配置為“以語音為中心”並且3GPP網絡120支持基於PS會話的IMS語音,UE 110向3GPP網絡120的IMS服務器發送SIP註冊消息(SIP REGISTER)以註冊IMS呼叫服務。In step S504, in response to
具體地,SIP註冊消息包括聯繫人報頭(Contact header)欄位,所述聯繫人報頭欄位中不存在或存在特定標籤的以提供UE 110到傳統3GPP網絡(例如,3GPP網絡130)的回退被禁用的指示。Specifically, the SIP registration message includes a contact header (Contact header) field, and the contact header field does not exist or has a specific tag to provide the
在一個實施例中,所述特定標籤可以是“g.3gpp.epsfb”標籤或“g.3gpp.ps-fallback”標籤,並且當聯繫人報頭欄位中缺少這樣的標籤時指示UE 110到傳統3GPP網絡的回退被禁用。In one embodiment, the specific tag may be a "g.3gpp.epsfb" tag or a "g.3gpp.ps-fallback" tag, and when such a tag is missing in the contact header field, it instructs the
在另一個實施例中,所述特定標籤可以是“g.3gpp.epsfb-forbid”標籤,“g.3gpp.epsfb-disallow”標籤,“g.3gpp.noepsfb”標籤或“g.3gpp.ps-fallback-forbid”標籤,並且當聯繫人報頭欄位中存在這樣的標籤時指示UE 110到傳統3GPP網絡的回退被禁用。請注意,如果應用了在SIP REGISTER消息中包括肯定(positive)指示的實施例,則UE 110可能需要重新註冊IMS呼叫服務,以在關鍵操作結束時允許EPS回退。In another embodiment, the specific tag may be a "g.3gpp.epsfb-forbid" tag, a "g.3gpp.epsfb-disallow" tag, a "g.3gpp.noepsfb" tag or a "g.3gpp.ps" tag. -fallback-forbid" tag, and when such a tag exists in the contact header field, it indicates that the fallback of the
在步驟S505中,UE 110從3GPP網絡120的IMS服務器接收SIP 同意(SIP OK)消息,以完成IMS註冊。In step S505, the
在步驟S506中,響應於3GPP網絡120不能如常地支持基於PS會話的IMS語音並且接收到包括指示UE110到傳統3GPP網絡(例如,3GPP網絡130)的回退被禁用的指示的SIP 註冊消息,3GPP網絡120的IMS服務器拒絕呼入呼叫。由於某些原因,3GPP網絡120可能不能如常地支持基於PS會話的IMS語音(即,EPS回退是唯一的選擇)。例如,當啟動對UE 110的呼入呼叫時3GPP網絡120的IMS服務器處於維護中,或者3GPP網絡120的運營商可能想要更頻繁地利用傳統3GPP網絡(例如,3GPP網絡130)的IMS服務時。In step S506, in response to the
在另一實施例中,如果在啟動對UE 110的呼入呼叫時3GPP網絡120本地支持基於PS會話的IMS語音,則3GPP網絡120可以繼續呼叫建立過程。In another embodiment, if the
鑑於第3圖至第5圖的前述實施例,將認識到,本發明通過允許UE提供UE到傳統3GPP網絡的回退被禁用的指示,來實現避免UE從先進的3GPP網絡回退到傳統3GPP網絡。有利地,UE可以保持與先進的3GPP網絡的連接,以保持關鍵操作的進行,而不會被可能觸發回退到傳統3GPP網絡的IMS呼入中斷。In view of the foregoing embodiments in Figs. 3 to 5, it will be recognized that the present invention avoids the UE’s fallback from the advanced 3GPP network to the traditional 3GPP by allowing the UE to provide an indication that the fallback of the UE to the traditional 3GPP network is disabled. The internet. Advantageously, the UE can maintain the connection with the advanced 3GPP network to keep key operations in progress without being interrupted by the IMS call that may trigger a fallback to the traditional 3GPP network.
第6圖是示出根據本申請的另一實施例的避免UE回退到傳統網絡的方法的流程圖。Fig. 6 is a flowchart showing a method for preventing a UE from falling back to a traditional network according to another embodiment of the present application.
在該實施例中,避免UE回退到傳統網絡的方法應用於並由第一3GPP網絡(例如3GPP網絡120)執行。具體地,第一3GPP網絡可通信地連接到UE(例如,UE 110)。In this embodiment, the method for preventing the UE from falling back to the traditional network is applied to and executed by the first 3GPP network (for example, the 3GPP network 120). Specifically, the first 3GPP network is communicatively connected to the UE (for example, UE 110).
首先,第一3GPP網絡從UE接收請求消息(步驟S610)。在一個實施例中,所述請求消息可以是註冊請求消息。First, the first 3GPP network receives a request message from the UE (step S610). In an embodiment, the request message may be a registration request message.
在步驟S610之後,第一3GPP網絡用響應消息向UE回復,所述響應消息指示第一3GPP網絡支持基於PS會話的IMS語音(步驟S620)。在一個實施例中,響應消息可以是註冊接受消息。After step S610, the first 3GPP network replies to the UE with a response message indicating that the first 3GPP network supports IMS voice based on the PS session (step S620). In one embodiment, the response message may be a registration acceptance message.
在步驟S620之後,響應於第一3GPP網絡支持基於PS會話的IMS語音,第一3GPP網絡允許來自UE的IMS註冊(步驟S630)。After step S620, in response to the first 3GPP network supporting IMS voice based on the PS session, the first 3GPP network allows IMS registration from the UE (step S630).
在步驟S630之後,響應於啟動對UE的呼入呼叫,第一3GPP網絡提供將在使用傳統的RAT的第二3GPP網絡中建立所述呼入呼叫的指示(步驟S640),然後方法結束。After step S630, in response to initiating the incoming call to the UE, the first 3GPP network provides an indication that the incoming call will be established in the second 3GPP network using the traditional RAT (step S640), and then the method ends.
在一個實施例中,如果由於某些原因第一3GPP網絡不能本地提供IMS呼叫服務,則第一3GPP網絡可以提供將在第二3GPP網絡中建立對UE的呼入呼叫的指示。例如,當啟動對UE的呼入呼叫時第一3GPP網絡的IMS服務器處於維護中,或者第一3GPP網絡的運營商可能想要更頻繁地利用第二3GPP網絡的IMS服務。In one embodiment, if the first 3GPP network cannot provide the IMS call service locally for some reasons, the first 3GPP network may provide an indication that the incoming call to the UE will be established in the second 3GPP network. For example, the IMS server of the first 3GPP network is under maintenance when the incoming call to the UE is initiated, or the operator of the first 3GPP network may want to use the IMS service of the second 3GPP network more frequently.
在一個實施例中,可以在SIP消息中向UE提供要在第二3GPP網絡中建立對UE的呼入呼叫的指示。稍後將在第7圖中給出該實施例的細節。In one embodiment, the UE may be provided with an indication in the SIP message to establish an incoming call to the UE in the second 3GPP network. The details of this embodiment will be given in Figure 7 later.
第7圖是示出了根據第6圖的實施例的避免UE回退到傳統網絡的方法的消息序列圖。Fig. 7 is a message sequence diagram showing the method for preventing the UE from falling back to the traditional network according to the embodiment of Fig. 6.
在步驟S701中,核心網絡122從UE 110接收註冊請求消息。In step S701, the
在步驟S702中,核心網絡122使用註冊接受消息答覆UE 110以指示3GPP網絡120支持基於PS會話的IMS語音。In step S702, the
在步驟S703中,UE 110與3GPP網絡120建立一個或複數個無線電承載以執行關鍵操作。In step S703,
具體地說,所述關鍵操作可以與LLC應用程式(例如遊戲應用程式)相關聯。Specifically, the key operations may be associated with LLC applications (such as game applications).
在步驟S704中,響應於UE 110配置為“以語音為中心”並且3GPP網絡120支持基於PS會話的IMS語音, UE 110向的3GPP網絡120的IMS服務器發送SIP註冊消息以註冊IMS呼叫服務。In step S704, in response to the
在步驟S705中,UE 110從3GPP網絡120的IMS服務器接收SIP 同意消息以完成IMS註冊。In step S705, the
在步驟S706中,3GPP網絡120的IMS服務器向UE 110發送SIP 邀請消息,其中,SIP 邀請消息指示將在傳統的3GPP網絡130中建立對UE 110的呼入呼叫。In step S706, the IMS server of the
在步驟S707中,3GPP網絡120的IMS服務器從UE 110接收SIP 403消息,其中SIP 403消息指示UE 110拒絕了所述呼入呼叫。In step S707, the IMS server of the
在步驟S708中,響應於接收到指示拒絕了所述呼入呼叫的SIP 403消息, 3GPP網絡120的IMS服務器拒絕所述呼入呼叫。In step S708, in response to receiving the SIP 403 message indicating that the incoming call is rejected, the IMS server of the
鑑於第6圖至第7圖的前述實施例,將認識到,本申請通過允許先進的3GPP網絡提供將在傳統的3GPP網絡中建立對UE的呼入呼叫的指示,來避免UE從先進的3GPP網絡回退到傳統的3GPP網絡。有利地,UE可以選擇拒絕所述呼入呼叫並保持與先進的3GPP網絡的連接,以保持正在進行的關鍵操作不會被可能觸發回退到傳統3GPP網絡的IMS呼入呼叫中斷。In view of the foregoing embodiments of Figures 6 to 7, it will be recognized that this application prevents the UE from changing from the advanced 3GPP network by allowing the advanced 3GPP network to provide an indication that the incoming call to the UE will be established in the traditional 3GPP network. The network falls back to the traditional 3GPP network. Advantageously, the UE can choose to reject the incoming call and maintain the connection with the advanced 3GPP network, so as to keep the ongoing key operations from being interrupted by the IMS incoming call that may trigger a fallback to the traditional 3GPP network.
儘管已經通過示例的方式並且根據優選實施例描述了本申請,但是應當理解,本申請不限於此。在不脫離本申請的範圍和精神的情況下,所屬技術領域具有通常知識者仍然可以做出各種改變和修改(例如,本申請同樣可適用於避免UE從傳統3GPP網路回退到先進的3GPP網路。例如,在第3圖所示的實施例中,所述第一3GPP網路可以是2G、3G或4G網路,所述第二3GPP網路可以是5G網路,並且在步驟S330中,回應於接收到指示所述第一3GPP支持基於PS會話的IMS語音時,提供指示UE到使用先進的RAT(例如,5G NR)的第二3GPP網路的回退被禁用的指示。再如,在第6圖所示的實施例中,所述第一3GPP網路可以是2G、3G或4G網路,所述第二3GPP網路可以是5G網路,並且在步驟S640中,回應於啟動對所述UE的呼入呼叫時,提供指示所述呼入呼叫將在使用先進的RAT(例如,5G NR)的第二3GPP網路中建立的指示)。因此,本申請的範圍應由所附申請專利範圍及其等同物限定和保護。Although the present application has been described by way of example and according to preferred embodiments, it should be understood that the present application is not limited thereto. Without departing from the scope and spirit of this application, those with ordinary knowledge in the technical field can still make various changes and modifications (for example, this application is also applicable to prevent UEs from falling back from traditional 3GPP networks to advanced 3GPP networks). For example, in the embodiment shown in Figure 3, the first 3GPP network may be a 2G, 3G, or 4G network, the second 3GPP network may be a 5G network, and in step S330 In response to receiving an indication that the first 3GPP supports PS session-based IMS voice, it provides an indication indicating that the UE's fallback to the second 3GPP network using an advanced RAT (for example, 5G NR) is disabled. For example, in the embodiment shown in Figure 6, the first 3GPP network may be a 2G, 3G, or 4G network, the second 3GPP network may be a 5G network, and in step S640, the response When an incoming call to the UE is initiated, an indication indicating that the incoming call will be established in a second 3GPP network using an advanced RAT (for example, 5G NR) is provided). Therefore, the scope of this application should be defined and protected by the scope of the attached patent application and its equivalents.
在申請專利範圍中使用諸如“第一”,“第二”等序數術語來修改申請專利範圍元素本身並不表示一個申請專利範圍元素相對於另一個申請專利範圍元素具有任何優先權,優先級或順序或執行一種方法的動作的時間順序,而僅用作標記以區分具有特定名稱的一個申請專利範圍元素與具有相同名稱的另一元素(但使用序數詞)以區分申請專利範圍的複數個元素。The use of ordinal terms such as "first" and "second" in the scope of the patent application to modify the elements of the patent application does not mean that an element of the patent application has any priority, priority or priority over another element of the patent application. The order or the chronological order of actions to perform a method, and is only used as a mark to distinguish an element of a patent application with a specific name from another element with the same name (but using an ordinal number) to distinguish plural elements of the patent application .
100:無線通信環境
110:用戶設備
120,130:3GPP網絡
121,131:接入網
122,132:核心網
10:無線收發器
11:基帶處理設備
12:RF設備
13:天線
30:儲存設備
20:控制器
40:顯示設備
50:輸入/輸出設備
S310,S320,S330,S401,S402,S403,S404,S405,S406,S407,S408,S501,S502,S503,S504,S505,S506,S610,S620,S630,S640,S701,S702,S703,S704,S705,S706,S707,S708:步驟100: wireless communication environment
110:
通過閱讀以下參考附圖的詳細描述和示例,可以更全面地理解本申請,其中:
第1圖是根據本申請的實施例的無線通信環境的框圖;
第2圖是示出根據本申請的實施例的UE 110的框圖;
第3圖是示出根據本申請的實施例的避免UE回退到傳統網絡的方法的流程圖;
第4圖是示出了根據第3圖的實施例的避免UE回退到傳統網絡的方法的消息序列圖;
第5圖是示出了根據第3圖的實施例的避免UE回退到傳統網絡的方法的另一消息序列圖;
第6圖是示出根據本申請的另一實施例的避免UE回退到傳統網絡的方法的流程圖;和
第7圖是示出根據第6圖的實施例的避免UE回退到傳統網絡的方法的消息序列圖。By reading the following detailed description and examples with reference to the accompanying drawings, you can understand this application more comprehensively, in which:
Figure 1 is a block diagram of a wireless communication environment according to an embodiment of the present application;
Figure 2 is a block diagram showing a
S310,S320,S330:步驟 S310, S320, S330: steps
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US16/862,876 | 2020-04-30 |
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