Processing method of urgent call

A technology of emergency call and processing method, applied in the direction of emergency/dangerous communication service, nan, electrical components, etc., can solve the problem of not being able to re-select the receiving cell and so on

Inactive Publication Date: 2010-12-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a method for processing an emergency call, which is used to solve the problem in the prior art that the UE cannot reselect a receiving cell that supports emergency calls when the cell where the UE is currently camping does not support emergency calls. question

Method used

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  • Processing method of urgent call

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] In this embodiment, when a terminal in a limited service and idle state residing in a EUTRAN network cell that does not support the emergency call service initiates an emergency service request, if it is determined that the UE cannot find a suitable cell in the EUTRAN network or a terminal that supports the emergency call service If the cell is accepted, the second processing method is used for processing.

[0049] Specifically, in this embodiment, a terminal in a limited service (limited service) and idle state residing in a cell that does not support the emergency call service initiates an emergency service request in a cell that does not support the emergency call service, and the UE transfers to Any cell In the selection state, search for cells that support emergency calls.

[0050] figure 2 It is a schematic diagram of UE state transition in this embodiment, such as figure 2 As shown, in this embodiment, when the UE initiates an emergency service request, the s...

Embodiment 2

[0055] In this embodiment, the terminal in the limited service (limited service) and idle state of the ETURAN cell that does not support the emergency call service initiates an emergency service request in a cell that does not support the IMS emergency call service, and the second processing method is adopted to process.

[0056] Specifically, in this embodiment, if the UE initiates an emergency service request, if the terminal determines that the cell it is currently camping on does not support emergency calls, the terminal triggers a cell reselection evaluation process (cell reselection evaluation process), and in this state Search for cells that support IMS emergency calls.

[0057] figure 2 It is a schematic diagram of UE state transition in this embodiment, such as figure 2 As shown, in this embodiment, when the UE initiates an emergency service request, the state transition of the UE mainly includes the following steps:

[0058] Step 1, the UE is in the state of cam...

Embodiment 3

[0061] In this embodiment, the terminal in the limited service (limited service) and idle state of a cell that does not support the emergency call service initiates an emergency service request in a cell that does not support the IMS emergency call service, and the above-mentioned third processing method is adopted Processing is performed to trigger a predetermined state (the predetermined state is a state supporting an emergency cell search / reselection process (EMC supported cell by selection / reselection process) state), and in the predetermined state search for a receiving cell that supports emergency calls.

[0062] The predetermined state in this embodiment is a newly added state in the embodiment of the present invention. In this predetermined state, the terminal uses cell search or cell re-search to search for a receiving cell that supports emergency calls.

[0063] image 3 It is a schematic diagram of UE state transition in this embodiment, such as image 3 As shown, ...

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Abstract

The invention discloses a processing method of an urgent call, which comprises the steps of: when a terminal that is resided in a cell not supporting an urgent call service and is in a limited service and idle state initiates an urgent service request, if determining that a proper cell or an acceptable cell supporting the urgent service can not be found in the current network, the terminal supports a circuit domain voice service and is in a coverage range of other networks, selecting or reselecting the cell by the terminal, and selecting one acceptable cell to be resided in the other networks. By adopting the invention, the terminal can reselect the acceptable cell supporting the urgent call.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to an emergency call processing method. Background technique [0002] In the Wideband Code Division Multiple Access (WCDMA) system, the traditional emergency call before Release 6 is only in the circuit switched domain (Circuit Switch, referred to as CS, also referred to as the circuit domain) ), the emergency call is implemented through a mobile switching center (Mobile-services Switching Center, MSC for short) of the core network. [0003] The emergency call of the IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) in the long-term evolution system (Long-Term Evolution, referred to as LTE) is different from the emergency call in the CS domain. accomplish. [0004] Currently, the Rel-8 core network supporting LTE does not support IMS emergency calls, while the Rel-9 core network supports emergency calls. [0005] If a UE wants to implement an emergency call in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/22H04W48/16H04W48/18H04W4/90
Inventor 王雪飞吴昊杜忠达黄亚达邓云
Owner ZTE CORP
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