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Emergency call achieving method and enhanced node B and user equipment

An emergency call and user equipment technology, applied in the field of LTE trunking systems, can solve problems such as no solution, and achieve the effect of shortening call delay and improving user experience

Inactive Publication Date: 2013-06-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no relevant solution in the prior art

Method used

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  • Emergency call achieving method and enhanced node B and user equipment
  • Emergency call achieving method and enhanced node B and user equipment
  • Emergency call achieving method and enhanced node B and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] For the 36.321 protocol, an RNTI (Radio Network Temporary Identifier, wireless network temporary identifier) ​​is extended as a dedicated emergency call group call service, and the eNodeB notifies the UE through the extended RNTI.

[0076] In the 36.321 protocol, the RNTI values ​​FFF4-FFFC are reserved for use, and now any value is used to expand the RNTI for emergency call group calls. In example 1, take FFF4 and define it as ME-RNTI, which is used for emergency call identification; in example 2, take FFFC and define it as ME-RNTI, which is used for emergency call identification. This is just an example and can be set as needed.

[0077] When the eNodeB receives the emergency call session request, it sends the DCI format 1C with the ME-RNTI identifier on the PDCCH channel in the latest notification period to notify the user equipment. During the group emergency call session, it is agreed on the PMCH channel agreed by agreement in one or more MBSFN AREA (MBNS single f...

Embodiment 2

[0079] The eNodeB notifies the user equipment of the emergency call through DCI format 1C.

[0080] The eNodeB identifies an emergency call session by setting one or more bits of DCI format 1C as preset values. For example, in example 1, the last 1 bit of DCI format 1C is 1 to identify an emergency call session; example 2, the 2bit position in DCI format 1C is 1 Identifies the emergency call session.

[0081] In this embodiment, it is stipulated that the MCS used for the emergency call session is QPSK encoding, and it is sent on a fixed subframe. For example 1, it is fixed to send on subframe 0; When a trunking emergency call session occurs, the PDCCH only includes an indication of the PMCH channel carrying the emergency call session.

[0082] When the eNodeB receives the processing of the emergency call session, it sends the DCI format 1C with the 2-bit position 1 on the PDCCH channel in the latest notification period to notify the user equipment. During the trunking emerge...

Embodiment 3

[0084] The eNodeB reserves some resources, such as radio resources enough for an emergency call service, such as figure 2 shown, including:

[0085] Step 1: The user or the cable dispatching station initiates a call request with an emergency call identifier;

[0086] Step 2: The eNodeB receives a call request to query available resources. For the calculation method of available resources, see figure 2 ,include:

[0087] If the current service is an emergency call, the available resources are the remaining resources of the cell;

[0088] If the current business is not an emergency call, the available resources are the remaining resources of the cell-reserved resources. In this embodiment, the reserved resources are group call resources initiated by an emergency call. Of course, more resources can also be reserved. This is not limited.

[0089] Step 3: The remaining resources of the eNodeB are sufficient to accept the service, and at the same time, the remaining radio resour...

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Abstract

The invention provides a broadband digital trunking system emergency call achieving method which comprises that an enhanced node notifies user equipment of emergency call dialogue currently after receiving an emergency call dialogue beginning request, during a notification period of the recent moment, in a physical downlink control channel. The invention further provides the enhanced node B and the user equipment. The emergency call achieving method, the enhanced node B and the user equipment can achieve broadband digital trunking system emergency call.

Description

technical field [0001] The present invention relates to an LTE (Long Term Evolution, long-term evolution) trunking system, in particular to a TD-LTE (Time Division Long Term Evolution, time-division long-term evolution)-based broadband digital trunking system emergency call implementation method, enhanced node B and user equipment. Background technique [0002] The trunking communication system is a dedicated wireless communication system for specific industry applications developed to meet the command and dispatch needs of industry users. In the system, a large number of wireless users share a small number of wireless channels, and the command and dispatch is the main application. It is a multi-purpose, high-efficiency wireless communication system. The trunking communication system has a wide range of application markets in the fields of government departments, public safety, emergency communications, electric power, civil aviation, petrochemical and military. The network...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W4/22H04L29/06H04W4/90
Inventor 郄小丹刘创李群
Owner ZTE CORP
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