CN104284318A - Method for identifying emergency call in TD-LTE system - Google Patents
Method for identifying emergency call in TD-LTE system Download PDFInfo
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- CN104284318A CN104284318A CN201310285680.1A CN201310285680A CN104284318A CN 104284318 A CN104284318 A CN 104284318A CN 201310285680 A CN201310285680 A CN 201310285680A CN 104284318 A CN104284318 A CN 104284318A
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- call service
- terminal
- service
- core net
- emergence call
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/50—Connection management for emergency connections
Abstract
The invention discloses a method for identifying an emergency call in a TD-LTE system. The method includes the steps that A, a terminal makes a resource bearing request for an emergency call service to a core network; B, the core network receives the resource bearing request of the terminal, distributes new borne loads or modifies existing borne loads for the emergency call service according to a local strategy, and stores corresponding relationships between TFTs and PFs which correspond to the borne loads and the emergency call service; C, the core network receives service data sent to the terminal by a service server, extracts IP information and/or port information in a service data package and carries out matching on information stored in the PFs in the TFTs of the terminal; as for the successfully-matched PFs, if the corresponding relationships between the PFs and the emergency call service are stored by the core network, the service data package is identified to be emergency call service data. By means of the scheme, on the basis that network-side devices are not additionally arranged, cost is not increased, and the usage rate of resources of the core network is not influenced, the core network can rapidly and effectively identify the emergency call service.
Description
Technical field
The application relates to mobile communication technology field, particularly relates to the recognition methods of urgent call in a kind of TD-LTE system.
Background technology
Along with the communication technology and the development of network architecture flattening and continuing to bring out of multiple high-speed wideband mobile wireless access technology, in order to ensure third generation mobile Partnership Program (3GPP, 3rd Generation Partnership Project) competitiveness, and consider that the wireless communication system of evolution can provide higher transmission rate with lower cost and shorter transmission delay, support the mobility between 3GPP inter Access System and the mobility between 3GPP connecting system and non-3 GPP access system simultaneously, improve 3GPP system capability and performance, reduce costs, 3GPP proposes System Architecture Evolution (LTE/SAE, Long Term Evolution, Long Term Evolution/System Architecture Evolution, ) next generation communication technology and framework theory.SAE, as the evolution of GPRS core network, has simplification framework, the feature of all-IP network, to higher throughput with more the 3GPP Radio Access Network (RAN, Radio Access Network) of low latency and non-3 GPP system access provide support.
Urgent call (Emergency Call) business refers to that user in case of emergency, the call business of being initiated by terminal.Usually be a fixed number in a region, 911 of the such as U.S., Chinese 110/119 etc., operator also can configure more emergency telephone number according to self needing.Be different from other business, emergence call service requires higher to the success rate of business, that is, the priority of urgent call is higher than other types of service, when inadequate resource, should be preferably emergence call service and serve; Meanwhile, emergence call service requires higher to the continuity of business, and namely priority service power is enjoyed in the mobile management of emergency call user.
System based on TD-LTE is made up of terminal, base station, core net and business network four part usually, and each part in system all needs to identify emergence call service.Whether terminal needs Client-initiated call business and the business of being exhaled that receives is that emergence call service identifies; Whether base station needs user is that the wireless access carried out because of emergence call service identifies, meanwhile, base station needs whether the subscriber paging operation carried out core net is that the carrying out produced because of emergence call service identifies; Core net needs to identify whether to the business operation of user be that emergence call service identifies, can carry out urgent paging operation to the terminal of idle condition; Business network needs whether the business initiated terminal use is that emergence call service identifies and processes.
Under the SAE framework of TD-LTE system, the recognition methods of core net to emergence call service mainly contains following two kinds:
1) based on the recognition methods of emergency call service control unit (E-CSCF, Emergency-Call Server Control Function) in IP Multimedia System (IMS, IP Multimedia Subsystem).
In the LTE standard of 3GPP, for supporting the IMS system of E-CSCF, to be terminal with the E-CSCF in IMS set up that the IP being specifically designed to emergence call service is connected Access Network (IP-CAN, IP Connectivity Access Network) connects for the strategy of employing; Simultaneously, APN (the APN of emergence call service is specifically designed in terminal and core net, Access Point Name) set up packet data network (PDN, Packet Data Network) and connect and obtain the IP address that the corresponding emergence call service of terminal uses.Core net connects by the different PDN used UE the identification realized emergence call service.
The feature of the method needs to set up special IP-CAN for emergence call service to connect, terminal and IMS system set up the IMS session of emergence call service by urgency traffic service discovery process, and set up PDN between the special APN provided in terminal and core net and connect.The method needs to provide E-CSCF equipment specially, simultaneously because the method is made a further demand to terminal, core net and IMS subsystem, each equipment all needs to carry out new configuration and function to realize the support to emergence call service, and this will greatly increase the complexity of existing system and safeguard complexity.
2) recognition methods of (DPI, Deep Packet Inspection) is detected based on deep message.
The mode that deep message detects refers to that core net carries out protocol analysis to the user face data that terminal uses in PDN Gateway, protocol information is obtained from user face data message, analyze and identify call business and emergence call service, thus realizing the identification to emergence call service.
The feature of the method is that the PDN Gateway in core net needs to intercept and protocal analysis the user face data message of terminal.Due to the core processing equipment that core net is in LTE system, it maintains a large amount of terminal equipments and the user face data of magnanimity, the method needs the whole user face datas of core net to each terminal that it is safeguarded to resolve, this will cause the serious waste of resources of core network, greatly increase load and the process complexity of core net, serious reduction data exchange processing ability and service bearer ability.
Summary of the invention
This application provides the recognition methods of urgent call in a kind of TD-LTE system, do not increasing network equipment and cost, and do not affect on the basis of utilization rate of resources of core network, core net can be made to identify fast and effectively emergence call service.
The recognition methods of urgent call in a kind of TD-LTE system that the embodiment of the present application provides, the method comprises:
A, terminal initiate the bearing resource request for emergence call service to core net;
B, core net receive the bearing resource request of terminal, core net is that emergence call service distributes new carrying or revises existing carrying according to local policy, preserves the corresponding relation of described carrying corresponding traffic flow template TFT, IP filter PF and emergence call service;
C, core net receive the business datum that service server issues terminal, and core net extracts IP information and/or port information in business data packet, and in each traffic flow template of terminal, does mate with the information of preserving in IP filter; For the IP filter of successful match, if core net saves the corresponding relation of this IP filter and emergence call service, then this business data packet is identified as emergence call service data.
Preferably, the IP address and/or the port that are exclusively used in emergence call service are set in service server; Steps A comprises:
A1, terminal originating service registration process, service log-on server in service log-on response signaling by the IP address of emergence call service in service server and/or port notification terminal;
A2, terminal preserve the emergence call service IP address and/or port information that obtain, and initiate for the bearing resource request of emergence call service to core net according to above-mentioned information.
Preferably, terminal described in steps A is initiated to comprise for the bearing resource request of emergence call service to core net: terminal comprises the IP filter of corresponding emergence call service at the traffic flow template of bearing resource request, the 7th value be set to for representing emergence call service of the first byte of described IP filter; Far-end IP address in IP filter context in described IP filter and/or remote port are set to IP address and/or the port information of emergency call service device.
As can be seen from the above technical solutions, by the dedicated bearing process of establishing between terminal and core net or dedicated bearing modification process, between terminal and core net, set up the dedicated bearing that can be used for emergence call service to use, and make the PDN Gateway in core net identify emergence call service fast by TFT and PF.Compared with traditional emergence call service recognition methods, the method information that effectively make use of in existing TD-LTE standard that the application proposes solves the quick identification of core net to emergence call service, do not increasing network equipment and cost, do not affect on the basis of the utilization rate of resources of core network, do not increase the extra load of core net and process complexity, disposal ability can not be exchanged to core network data and service bearer ability impacts, simple and fast achieve core net to emergence call service identification.
Accompanying drawing explanation
The recognition principle schematic diagram of the emergence call service that Fig. 1 provides for the embodiment of the present application;
The emergence call service recognition methods schematic flow sheet that Fig. 2 provides for the embodiment of the present application.
Embodiment
The recognition methods of urgent call in the TD-LTE system that the application provides, its core technology is contemplated that: effectively utilize the traffic flow template (TFT used between terminal and core net in TD-LTE standard, Traffic Flow Template) and IP filter (PF wherein, Packet Filter), by the dedicated bearing process of establishing between terminal and core net or dedicated bearing modification process, the dedicated bearing that can be used for emergence call service to use is set up between terminal and core net, and make the PDN Gateway in core net identify emergence call service fast by TFT and PF.
For making the know-why of technical scheme, feature and technique effect clearly, below in conjunction with specific embodiment, technical scheme is described in detail.
In the recognition methods of urgent call in the TD-LTE system that the embodiment of the present application provides, terminal carries out service log-on process by register command and service log-on server.For the service provider supporting emergence call service, its service log-on server in service log-on response signaling by the IP address of emergence call service in service server and/or port notification terminal, this IP address and/or port information should independent of other business, that is, service server can be emergence call service by this IP address and/or port information differentiated service.Terminal by the bearing resource assigning process between core net or bearing resource modification process, the bearing resource used to core network requests emergence call service and Radio Resource.By Business Stream information entrained in signaling, terminal indicates this bearing resource to be used for emergence call service to core net.
Below providing a kind of terminal indicates this bearing resource will be used for the concrete mode of emergence call service by Business Stream information to core net:
Respectively as shown in Table 1 and Table 2, the 7th that wherein in IP filter structure, first character saves is spare bits for the traffic flow template structure of 3GPP agreement defined and IP filter structure.By the 7th of the first byte the being defined as urgency traffic mark (Emergency Flag), the current requested resource of core net can be indicated fast to be used by emergence call service, and the amended structure that the embodiment of the present application provides is as shown in table 3.
The IP address that the emergence call service obtained from business registrar uses by terminal and/or port information, as far-end IP address and/or the remote port parameter of IP filter context (Packet Filter Contents), pass to core net.
TFT structure table in table 13GPP agreement 24.008
Packet Filter structural table in table 23GPP agreement 24.008
Table 3 amended Packet Filter structural table
Core net receives the demand signalling of terminal in bearing resource distribution or bearing resource modification process, and by identifying the urgency traffic mark in IP filter, core net can confirm that terminal applies for bearing resource because of emergence call service.Core net can distribute special new bearing resource for emergence call service according to local policy, also can revise existing bearing resource for terminal and provide the carrying of emergence call service.Core net preserves traffic flow template and the corresponding relation of IP filter in record traffic flow template and emergence call service.
The recognition principle of the emergence call service that the embodiment of the present application provides as shown in Figure 1.When core net detects that service server issues the business data packet of terminal, the IP in core net parsing business data packet and/or port information, and the IP preserved with the IP filter in each traffic flow template of terminal successively and/or port information mate.For the IP filter of successful match, core net confirms as emergence call service according to IP filter and emergence call service corresponding relation, then this traffic identification is emergence call service by core net.
The emergence call service recognition methods flow process that Fig. 2 provides for the embodiment of the present application, comprises the steps:
Step 201: terminal originating service registration process, service log-on server in service log-on response signaling by the IP address of emergence call service in service server and/or port notification terminal.Service log-on server in the embodiment of the present application supports emergence call service, and the IP address that in service server, emergence call service uses and/or port information should independent of other business.
Step 202: terminal preserves the emergence call service IP address and/or port information that obtain, and initiates for the bearing resource request of emergence call service to core net according to above-mentioned information.
In step 202., terminal is initiated bearing resource to core net and is distributed request or bearing resource amendment request, and terminal needs the IP filter traffic flow template of demand signalling being arranged corresponding emergence call service.Terminal needs the urgency traffic mark in IP filter to carry out set, to notify that the current bearing resource application of core net is carried out for emergence call service.The IP address and/or the port information that arrange emergency call service device in the IP filter context of terminal needs in IP filter are far-end IP address and/or remote port.
Step 203: core net receives the bearing resource request of terminal, core net can be that emergence call service distributes new carrying or revises existing carrying according to local policy, preserves the corresponding relation of TFT, PF and emergence call service.
In step 203, core net is resolved and preserve traffic flow template in selected carrying, and be the IP filter of emergence call service for terminal iidentification, core net preserves the corresponding relation of traffic flow template, IP filter and emergence call service.
Step 204: core net receives the business datum that service server issues terminal, and core net extracts IP information and/or port information in business data packet, and in each traffic flow template of terminal, does mate with the information of preserving in IP filter.For the IP filter of successful match, if core net saves the corresponding relation of this IP filter and emergence call service, then this business data packet is identified as emergence call service data, thus realizes the identification to emergence call service.
By above process, on the basis not increasing network equipment and cost, simple and fast achieve the identification of core net to emergence call service.The method does not increase load and the process complexity of core net, can not exchange disposal ability to core network data and service bearer ability impacts yet.
The foregoing is only the preferred embodiment of the application; not in order to limit the protection range of the application; within all spirit in technical scheme and principle, any amendment made, equivalent replacements, improvement etc., all should be included within scope that the application protects.
Claims (3)
1. a recognition methods for urgent call in TD-LTE system, is characterized in that, the method comprises:
A, terminal initiate the bearing resource request for emergence call service to core net;
B, core net receive the bearing resource request of terminal, core net is that emergence call service distributes new carrying or revises existing carrying according to local policy, preserves the corresponding relation of described carrying corresponding traffic flow template TFT, IP filter PF and emergence call service;
C, core net receive service server and issue the business datum of terminal, and core net extracts IP information and/or port information in business data packet, and do with the information of preserving in IP filter in each traffic flow template of terminal and mate; For the IP filter of successful match, if core net saves the corresponding relation of this IP filter and emergence call service, then this business data packet is identified as emergence call service data.
2. method according to claim 1, is characterized in that, arranges the IP address and/or the port that are exclusively used in emergence call service in service server; Steps A comprises:
A1, terminal originating service registration process, service log-on server in service log-on response signaling by the IP address of emergence call service in service server and/or port notification terminal;
A2, terminal preserve the emergence call service IP address and/or port information that obtain, and initiate for the bearing resource request of emergence call service to core net according to above-mentioned information.
3. method according to claim 2, it is characterized in that, terminal described in steps A is initiated to comprise for the bearing resource request of emergence call service to core net: terminal comprises the IP filter of corresponding emergence call service at the traffic flow template of bearing resource request, the 7th value be set to for representing emergence call service of the first byte of described IP filter; Far-end IP address in IP filter context in described IP filter and/or remote port are set to IP address and/or the port information of emergency call service device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310285680.1A CN104284318B (en) | 2013-07-09 | 2013-07-09 | The recognition methods of urgent call in a kind of TD LTE systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310285680.1A CN104284318B (en) | 2013-07-09 | 2013-07-09 | The recognition methods of urgent call in a kind of TD LTE systems |
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| CN104284318A true CN104284318A (en) | 2015-01-14 |
| CN104284318B CN104284318B (en) | 2017-12-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016119235A1 (en) * | 2015-01-30 | 2016-08-04 | 华为技术有限公司 | Vehicle emergency call method, vehicle-mounted terminal and system |
| CN107864483A (en) * | 2017-12-01 | 2018-03-30 | 广东欧珀移动通信有限公司 | Access detection method, device and the computer-readable storage medium of result |
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| CN101500213A (en) * | 2008-02-03 | 2009-08-05 | 华为技术有限公司 | Method, equipment and system for user equipment urgent access |
| CN101621779A (en) * | 2009-07-30 | 2010-01-06 | 华为技术有限公司 | Method, device and system for urgency call |
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Patent Citations (3)
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| CN1933656A (en) * | 2005-09-16 | 2007-03-21 | 中兴通讯股份有限公司 | Emergency call processing method in wideband code division multiple access system |
| CN101500213A (en) * | 2008-02-03 | 2009-08-05 | 华为技术有限公司 | Method, equipment and system for user equipment urgent access |
| CN101621779A (en) * | 2009-07-30 | 2010-01-06 | 华为技术有限公司 | Method, device and system for urgency call |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119235A1 (en) * | 2015-01-30 | 2016-08-04 | 华为技术有限公司 | Vehicle emergency call method, vehicle-mounted terminal and system |
| CN107005825A (en) * | 2015-01-30 | 2017-08-01 | 华为技术有限公司 | A kind of automobile emergency method of calling, car-mounted terminal and system |
| CN107005825B (en) * | 2015-01-30 | 2019-12-17 | 华为技术有限公司 | Automobile emergency call method, vehicle-mounted terminal and system |
| CN107864483A (en) * | 2017-12-01 | 2018-03-30 | 广东欧珀移动通信有限公司 | Access detection method, device and the computer-readable storage medium of result |
| CN107864483B (en) * | 2017-12-01 | 2021-08-10 | Oppo 广东移动通信有限公司 | Method and device for detecting access result and computer storage medium |
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| CN104284318B (en) | 2017-12-15 |
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