Evolved packet system and attachment processing method of emergency call thereof

An emergency call and grouping system technology, applied in the field of communication, can solve the problems of emergency call failure, UE attachment failure, network unsupported, etc., and achieve the effect of ensuring consistency and success

Inactive Publication Date: 2011-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Step 407, the MME sends a security mode command (SMC) message to the UE, and the SMC fails due to a different Kasme, thus causing the UE to fail to attach
[0018] The emergency call service is a service that the communication network must support by law. However, in related technologies, when the terminal selects a PLMN that does not support emergency calls, the emergency call will fail and the network cannot support this service.

Method used

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  • Evolved packet system and attachment processing method of emergency call thereof
  • Evolved packet system and attachment processing method of emergency call thereof
  • Evolved packet system and attachment processing method of emergency call thereof

Examples

Experimental program
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Embodiment 1

[0077] Such as Figure 7 As shown, in the preferred embodiment 1, the base station is shared by multiple PLMNs, at least one of which supports emergency services. The user terminal UE is in a restricted service state, that is, it cannot enjoy normal services provided by the network, and can only obtain emergency call services provided by the network.

[0078]Step 701, the system message sent by the base station includes a bit, broadcasting that the current cell supports emergency calls, and the broadcast also includes a list of all PLMN IDs currently sharing the base station, that is, the PLMNs to which the base station is connected;

[0079] Step 702, the UE that is in the limited service state and needs to initiate an emergency call sends an RRC connection establishment request message to the base station according to the above broadcast, which includes the UE's identifier, which is a random number, and the reason for initiating the call, which is urgent;

[0080] Step 703...

Embodiment 2

[0085] Such as Figure 8 As shown, in the second preferred embodiment, the base station is shared by multiple PLMNs, at least one of which supports emergency services. The user terminal UE is in a restricted service state, that is, it cannot enjoy normal services provided by the network, and can only obtain emergency call services provided by the network.

[0086] Step 801, the system message sent by the base station includes a bit, broadcasting that the current cell supports emergency calls, and the broadcast also includes a list of all PLMN IDs currently sharing the base station, that is, the PLMNs to which the base station is connected;

[0087] Step 802, the UE that is in the limited service state and needs to initiate an emergency call sends an RRC connection establishment request message to the base station according to the above broadcast, which includes the UE's identifier, which is a random number, and the reason for initiating the call, which is urgent;

[0088] St...

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Abstract

The invention discloses an evolved packet system and an attachment processing method of an emergency call thereof. The method comprises the following steps: a base station selects one of public land mobile networks (PLMN) supporting the emergency call according to a received emergency call request message from a terminal in a limited state; the base station establishes a message from the information of the selected PLMN through radio resource control (RRC) connection and sends the message to a terminal; and the terminal establishes attachment with the selected PLMN by using the message. Through the invention, the PLMN to which the UE (user equipment) selects to attach is ensured to support the emergency call; and in the AKA (authentication and key agreement) flow, the consistency between the root keys generated by the terminal and MME (mobility management entity) is ensured, thus the success of the emergency call can be ensured.

Description

technical field [0001] The present invention relates to the communication field, in particular to an evolved packet system and an emergency call attachment processing method thereof. Background technique [0002] IP Multimedia Subsystem (IP Multimedia Core Network Subsystem, IMS) is the core of the new generation communication network, which adopts the Session Initiation Protocol (Session Initiation Protocol, SIP) system. SIP has nothing to do with access, and has multiple capabilities such as separation of media service control function and bearer, call and session, application and service, business and network, and integration of mobile network and Internet services. [0003] Since the IMS has nothing to do with access, the emergency service (EmergencyCall, EMC) under the IMS can be built on the system long-term evolution (System Architecture Evolution, SAE) network. The SAE may also be called EPS (Evolved Packet System, evolved packet system). [0004] figure 1 It is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/22H04W76/02H04W4/90
CPCH04W76/02H04W76/007H04W4/22H04W48/18H04W12/06H04W76/50H04W4/90H04W76/10
Inventor 朱春晖杜忠达
Owner ZTE CORP
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