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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 4 Architectural Assumptions and Requirements
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 4.1 Architectural Assumptions
| Editor's note: This clause documents the common architecture assumptions identified for the study.
- The architectures for SMS over NAS (see TS 23.272 [7], TS 23.401 [5], TS 23.501 [2], TS 23.502 [3]) and SMS over IP (see TS 23.204 [8]) and the architectural principles of Emergency Services (see TS 23.167 [9]) will be... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 4.2 Architectural Requirements
| Editor's note: This clause defines the architectural requirements that serve as the foundation for the study.
Solutions shall be defined both for networks supporting IMS and networks not supporting IMS.
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5 Key Issues
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5.1 Key Issue #1: Identification of SMS to Emergency Response Centre and Emergency Service Type
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5.1.1 Description
| Based on the requirements in TS 22.101 [6], the EPS and 5GS shall have the capability to route a Short Message where the destination is an emergency number to a local Emergency Response Centre (i.e. a PSAP) according to the local regulation.
This key issue aims to study solutions to:
- identify whether an SMS should ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5.2 Key Issue #2: Support of SMS Delivery to Emergency Response Centre via NAS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5.2.1 Description
| To support the SMS delivery to the Emergency Response Centre via NAS based on local regulations, following aspects are included:
- study how to route the SMS via NAS procedures for the support of SMS delivery to local Emergency Response Centre, e.g. UE location determination, via SMS service centre of the serving PLMN... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5.3 Key Issue #3: SMS over IP Routing to Appropriate PSAP
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 5.3.1 Description
| The following aspects are to be studied:
- how and when to trigger location determination and location data sharing when sending short messages using SMS over IP for routing to Emergency Response Centre, considering both 3GPP and non-3GPP access scenarios;
- how to route short messages using SMS over IP to Emergency ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6 Solutions
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.0 Mapping of Solutions to Key Issues
| Table 6.0-1: Mapping of Solutions to Key Issues
Key Issues
Solutions
1
2
3
1
X
2
X
3
X
4
X
X
5
X
X
6
X
X
7
X
X
8
X
9
X
10
X
11
X
12
X
13
X
14
X
15
X
16
X
17
X
18
X
X
19
X
X
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1 Solution #1: Support of SMS to EC indication and SMS user data header for SMS to EC
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.0 High level principles
| The following high-level principles are proposed for the support of SMS to Emergency Centre (EC) service:
- A header is introduced within the SMS-SUBMIT TPDU, specifically within the TP-UDH. The header may include emergency-related information such as the requested emergency service type, callback identifiers, or othe... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.1 Description
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.1.1 UE Detected and Non UE Detectable SMS to EC
| To support reliable detection and routing of SMS to EC, the UE may include a header within the TP-UDH of the SMS-SUBMIT TPDU. The header may carry critical information such as a callback number, emergency service type and location information e.g. pre-registered civic address for the purpose of emergency, GPS/device-ba... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.2 Procedures
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.2.1 Roaming Handling
| For emergency messages initiated by a roaming user, the principle of Local Breakout is maintained, prioritizing service from the VPLMN based on local regulations. If the UE does not know its own location, the UE may retrieve its location information from the VPLMN, e.g. LRF lookup and the VPLMN routes the message direc... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.2.2 Callback Handling
| When the PSAP replies, it sends the message back to the TP-OA (MSISDN).
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.1.3 Impacts to Services, Entities and Interfaces
| UE:
- Support the inclusion of a header with emergency-related information in the TP-UDH of SMS-SUBMIT when originating SMS to EC.
- Indicate towards the NAS layer that the MO data transport contains SMS to EC.
SMSC/SMS Router:
- Inspect SMS-SUBMIT TPDU for presence of the header with emergency-related information ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2 Solution #2: Capability and Identification of the SMS delivery to Emergency Response Centre
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.0 High level principles
| This solution aims to address KI#1 with the following key principles:
- The serving network provides indication of support for SMS delivery to Emergency Response Centre and the emergency number list to UE during UE registration/attach and IMS registration (in case of non-roaming), if SMS delivery to Emergency Response... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.1 Description
| This solution addresses KI#1 with the principles as described in clause 6.2.0.
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.2 Procedures
| During the registration/attach and IMS registration procedure (in case of non-roaming), the AMF/MME/S-CSCF provides the indication of the supporting SMS delivery to Emergency Response Centre in the serving network and the emergency number list based on local policy.
For the SMS delivery to Emergency Response Centre, i... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.2.1 Registration Procedures in 5GS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.2.1.1 Registration procedure for SMS over NAS
| The following procedures are based on clause 4.13.3 of TS 23.502 [3] with the following additions (in bold underline).
Figure 6.2.2.1.1-1: Based on TS 23.502 [3], Figure 4.13.3.1-1: Registration procedure supporting SMS over NAS
1. During Registration procedure in 5GS defined in Figure 4.2.2.2.2-1, to enable SMS ov... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.2.1.2 Attach procedure in EPS
| The SMS over NAS delivery to Emergency Response Centre is similar to 5GS procedure with the change that the MME takes to role of AMF/SMSF.
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.2.2 IMS Registration procedure
| The following procedures are based on TS 23.204 [8] with the following additions (in bold underline). This procedure is considered when UE is in non-roaming.
Figure 6.2.2.2-1: Based on TS 23.204 [8], Figure 6.1: Registration procedure
1) The UE establishes IP connection.
2) At any time after the establishment of t... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.2.3 Impacts to Services, Entities and Interfaces
| UE:
- Handling "SMS over NAS delivery to Emergency Response Centre allowed" indication and emergency number list in Registration/Attach Accept messages.
- Support the handling of SMS over IP delivery to Emergency Response Centre during IMS registration procedure, e.g. support of "+g.3gpp.smsip-delivery to Emergency R... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.3 Solution #3: Identification of SMS to EC
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.3.0 High level principles
| The following principles are applied to this solution:
- During initial attach/registration, a UE indicates support for SMS to EC and may be provided with local emergency numbers corresponding to different service types as specified in TS 23.167 [9] for emergency calls.
- The UE detects a MO SM to EC.
- If SMS to EC... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.3.1 Description
| The solution addresses KI#1 by enabling the UE and the network to be aware of the support of SMS to EC, the available emergency numbers and their related emergency service type.
The UE indicates its support of SMS to EC during initial attach/registration. If the network supports SMS to EC, it shall indicate it to the ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.3.2 Procedures
|
Figure 6.3.2-1: Detection of a Short Message to Emergency Centre
1a. The UE indicates its support of SMS to EC during initial attach/registration and the network acknowledges it.
1b. Depending on local PLMN emergency services and regulations, MME/AMF may provision the UE with local emergency numbers and service typ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.3.3 Impacts to Services, Entities and Interfaces
| UE:
- Indicates support for SMS to EC to the network.
- Addresses SM to EC with appropriate emergency number.
- In the case of SMS over NAS, includes an UL NAS type "SMS to EC".
MME/AMF:
- Reports support of SMS to EC during attach/register complete message.
- In the case of SMS to EC over NAS, detects SM to be s... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.4 Solution #4: SMS to PSAP over NAS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.4.0 High level principles
| The high-level principles of the proposed solution are as follows:
- The proposed solution focuses on SMS to Emergency Response Centre (SMS2EC) or PSAP over NAS.
- UE sends SMS2EC to the network via UL NAS TRANSPORT.
- There should be an emergency identifier included in the UL NAS TRANSPORT message content.
- The e... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.4.1 Description
| This solution addresses Key Issue#1 and Key Issue#2.
Currently the addresses of Emergency Response Centres/PSAPs vary in different areas even they belong to the same country. When UE triggers the request of SMS2EC service, it would be more flexible if the UE only needs to report certain emergency type identifier which... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.4.2 Procedures
|
Figure 6.4.2-1: SMS to PSAP over NAS in 5GS
Editor's note: Procedure for EPS is FFS.
The steps of figure 6.4.2-1 are described as follows:
1. The UE performs initial registration for SMS over NAS and includes the 5GS update type IE in the REGISTRATION REQUEST message with the SMS requested bit set to "SMS over NAS... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.4.3 Impacts to Services, Entities and Interfaces
| Editor's note: Impacts on EPS entities is FFS.
UE:
- Encapsulates the NAS message with emergency type and UE location information included.
AMF:
- Identifies the SMS2EC over NAS by emergency type identifier.
- Determines the message priority of SMS2EC over NAS.
- Enhances the UE location information.
- Forwards ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5 Solution #5: Support of Short Message to Emergency Response Centre via SMS over NAS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.0 High level principles
| This solution aims to resolve Key Issue #1 & #2, i.e. "Support of Short Message to Emergency Response Centre via SMS over NAS". The solution principles shall follow the architectural assumptions described in clause 4.
To address the issue described in WT-1, the following solutions are proposed:
- UE sends a new indic... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.1 Description
| This solution addresses Key Issue #1 & #2.
- The SMSF, if configured with local emergency support, sends the EM availability indication during the registration procedure. AMF informs the UE about the EM SMS feature.
- UE needs to do access control for a new upper layer event (e.g. EM SMS) to trigger a service request... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.2 Procedures
| During EPS/5GS registration, the UE indicates its capability to support SMS over NAS and/or SMS over IP. The serving network also indicates its capability to support these services in the registration response.
If the serving network has provided the above-mentioned SMS over NAS indication, then UE invokes the followi... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.2.1 Short Message routing to the Emergency Response Centre via SMS over NAS via 5GS
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Figure 6.5.2.1-1: Short Message to Emergency Response Centre via SMS over NAS via 5GS
0. UE registration to the 5GS follows clause 4.13.3.1 of TS 23.502 [3] with the additional indication as described in clause 6.5.2. This additional indication can be sent by AMF.
1. If the UE is in the CM-IDLE state, then the UE f... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.2.2 Short Message routing to the Emergency Response Centre via SMS over NAS via EPS (via MSC/VLR)
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Figure 6.5.2.2-1: Short Message to Emergency Response Centre via SMS over NAS via EPS (via MSC/VLR)
0. The attach procedure follows the procedure as specified in clause 5.2 of TS 23.272 [7] with the additional indication in the Attach Request/Response as described in clause 6.5.2. This indication can be sent by eith... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.2.3 Route a Short Message to Emergency Response Centre via SMS over NAS via EPS (via SGd interface)
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Figure 6.5.2.3-1: Short Message to Emergency Response Centre via SMS over NAS via EPS (via SGd interface)
0. The attach procedure follows the procedure as specified in clause 5.3.2.1 of TS 23.401 [5] with the additional indication in the Attach Request/Response as described in clause 6.5.2. This indication can be se... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.5.3 Impacts to Services, Entities and Interfaces
| The solution has the following impacts:
UE:
- Need to support network feature indication from EPS and 5G core on the availability of Emergency Messaging.
AMF:
- Need to support a new NAS payload type for SMS meant for EC.
- Need to support feature indication to indicate serving PLMN's support for SMS routing to EC... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6 Solution #6: Support of Short Message Service Routing to Emergency Response Centre via NAS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.0 High level principles
| This solution addresses KI#1 and KI#2.
The principles of this solution are listed below:
- The UE detects Short Message Service to Emergency Centre (SMS2EC) based on the used emergency number.
- If the UE detects that the destination number of an Short Message is an valid emergency number, UE includes the emergency ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.1 Description
| In order to support routing of Short Message to the Emergency Centre, the network provides the emergency numbers, local SMSC address and associated emergency service types to the UE during the Attach, TAU, Initial registration and Mobility registration update procedure. Additionally, the network signals an indicator in... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.1.1 UE detecting Short Message Service to Emergency Centre
| The following figure depicts how a Short Message is routed to the local PSAP in case of UE detecting SMS2EC.
Figure 6.6.2.1-1: MO SMS routed to the local PSAP in case of UE detecting SMS2EC
If UE detects that the destination number is an emergency number, the UE replaces the RP-DA with local SMSC address (e.g. a lo... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.1.2 UE not detecting Short Message Service to Emergency Centre
| The following figure depicts how a Short Message is routed to the local PSAP in case of UE not detecting SMS2EC.
Figure 6.6.2.2-2: MO SMS routed to the local PSAP in case of UE not detecting SMS2EC
For the non-UE detectable emergency number, UE treats the SMS2EC as a regular Short Message. Upon determining that the... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.2 Procedures
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.2.1 MO SMS over NAS in EPS
| The following figure depicts the mobile originating procedure for SMS2EC in EPS.
Figure 6.6.2.1-1: MO SMS over NAS in EPS
0-1: If a UE that supports SMS2EC under CM-IDLE state is sending a Short Message, then UE and network perform the UE Triggered Service Request procedure firstly to establish a NAS signalling con... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.2.2 MO SMS over NAS in 5GS
| The following figure depicts the mobile originating procedure for SMS2EC in 5GS.
Figure 6.6.2.2-1: MO SMS over NAS in 5GS
0-1: If a UE that supports SMS2EC under CM-IDLE state is sending a Short Message, then UE and network perform the UE Triggered Service Request procedure firstly to establish a NAS signalling con... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.2.3 Emergency Response Centre Callback
| If the Emergency Response Centre (i.e. PSAP) needs to respond to the UE, the PSAP sends the reply message to the SMSC in PSAP's HPLMN. SMSC treats the reply message as regular MT SMS and the procedures for delivering MT SMS to the UE are described in clause 4.13.3 of TS 23.502 [3] and clause 8.2 of TS 23.272 [7].
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.6.3 Impacts to Services, Entities and Interfaces
| UE:
- Support to include SMSC address in the serving PLMN in RP-DA field and also include emergency number, associated emergency service type and UE's location in the SMS-SUBMIT TPDU part of the Short Message Service to Emergency Centre.
SMSF:
- Support to replace RP-DA with local SMSC address in the serving PLMN, u... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7 Solution #7: Enabling SMS over NAS for conditional local routing to Emergency Response Centre
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.0 High level principles
| This solution addresses KI#1 and KI#2 by enhancing short messages delivery using SMS over NAS and routing to local emergency response center (i.e. PSAP). This solution is proposed with the following principles:
- P1. Emergency Authentication Trigger: During Emergency Registration, the UE shall include a new authentica... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.1 Description
| The solution requires the following enhancements to the existing protocols and network functions:
1. Clarification of Emergency Authentication:
- When a UE performs Emergency Registration and includes a new authentication indication IE or sets the SMS requested bit in the 5GS update type IE in the Registration Reques... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.2 Procedures
| Editor's note: It is FFS how the same principles are applied for EPS and 5GS.
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.2.1 MO SMS over NAS in 5GS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.2.1.1 Emergency Registration Procedure in 5GS
| Figure 6.7.2.1.1-1 shows Emergency Registration procedure in 5GS.
Figure 6.7.2.1.1-1: Emergency Registration Procedure in 5GS
The following are the required enhancement for Emergency Registration Procedure:
1: The UE sends a Registration Request to the AMF. The message includes:
- 5GS registration type set to "em... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.2.1.2 Registration Procedure (VPLMN LBO Supported) in 5GS
| Figure 6.7.2.1.2-1 shows Registration procedure in 5GS.
Figure 6.7.2.1.2-1: Registration Procedure (VPLMN LBO Supported) in 5GS
The following are the procedure for Normal Registration (Negotiating Conditional LBO Capability):
1: The UE sends a Registration Request to the AMF, including the UE network capability IE... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.2.1.3 MO SMS over NAS Delivery in 5GS (VPLMN LBO Supported)
| Figure 6.7.2.1.3-1 shows MO SMS over NAS Delivery using LBO routing to local PSAP.
Figure 6.7.2.1.3-1: MO SMS over NAS delivery using LBO routing to local PSAP
The following are the procedure for MO SMS Delivery (Conditional LBO Trigger):
1: The UE performs Registration procedure as in Figure 6.7.2.1.2-1, or Emerg... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.2.1.4 MO SMS over NAS (VPLMN LBO Not Supported/Allowed - Home Routed Fallback)
| If MO SMS for LBO routing to local PSAP is not supported, the visited AMF applies the Home Routed policy. Figure 6.7.2.1.4-1 shows MO SMS over NAS Delivery in 5GS UE (VPLMN LBO Not Supported/Allowed- Home Routed Fallback).
Figure 6.7.2.1.4-1: MO SMS over NAS Delivery in 5GS (VPLMN LBO Not Supported/Allowed - Home Ro... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.7.3 Impacts to Services, Entities and Interfaces
| Editor's note: The impacts for EPS is FFS.
UE:
- Negotiate the new UE capability using SMS for LBO Support indication for Conditional LBO Support for SMS routing to local PSAP for normal registration procedure.
- Indicate a new Authentication IE or 5GS update type IE with the SMS requested bit set to "SMS over NAS s... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8 Solution #8: SMS over NAS delivery to Emergency Response Centre based on emergency call numbers
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.0 High level principles
| This solution aims to address KI#2 with the following key principles (considering the solutions for KI#1):
- The UE uses emergency call numbers/serving PLMN SM service centre address as RP-DA-destination.
- The SMSF/MME is responsible to deliver the SMS to the SM service centre based on the identification of the emer... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.1 Description
| In this proposal, it is also assumed that UE is aware of the supporting capability of the network based on the solutions provided for KI#1 (e.g. UE is informed that SMS over NAS delivery to Emergency Response Centre is supported by the network during the UE Registration/Attach procedure).
The main change is SMSF/MME d... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.2 Procedures
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.2.1 MO SMS over NAS delivery procedures
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.2.1.1 MO SMS over NAS in CM-IDLE in 5GS
| The following procedures are based on clause 4.13.3 of TS 23.502 [3] with the following additions (in bold underline).
Figure 6.8.2.1.1-1: Based on TS 23.502 [3], Figure 4.13.3.3-1: MO SMS over NAS
1. The UE performs domain selection for UE originating SMS as defined in clause 5.16.3.8 of TS 23.501 [2] if SMS deliv... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.2.2 MO SMS over NAS delivery procedures in EPS
| The SMS over NAS delivery to Emergency Response Centre is similar to 5GS procedure with the change that the MME takes to role of AMF/SMSF.
Editor's note: SGs interface based on SMS delivery is FFS.
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.8.3 Impacts to Services, Entities and Interfaces
| UE:
- Support the capability of SMS over NAS delivery to Emergency Response Centre during registration procedure, e.g. accept "SMS over NAS delivery to Emergency Response Centre allowed/supported" indication in Registration Accept.
- Formulates the RP-DA in the RP-DATA with serving PLMN SMS service centre or emergenc... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9 Solution #9: Support of SMS to Emergency Centre over NAS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.0 High level principles
| This clause describes support for the emergency Short Message Service (SMS) over NAS. This solution is based on the architectures for SMS over NAS (see TS 23.272 [7], TS 23.401 [5], TS 23.501 [2], TS 23.502 [3]) and the architectural principles of Emergency Services (see TS 23.167 [9]).
SMS to Emergency Centre over NA... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.1 Description
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.1.1 General
| This clause lists the additional functionality that is required to support SMS to Emergency Centre over NAS for roaming and non-roaming users.
High level description and signalling flows are described in TS 23.272 [7] Annex C for EPS and TS 23.502 [3] for 5GS. SMS to Emergency Centre over NAS in 5GS is based on the ar... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.1.2 Service assumptions
| The following service assumptions are considered for supporting SMS to Emergency Centre over NAS:
- The UE that supports SMS to Emergency Centre over NAS and detects SMS to Emergency Centre over NAS based on used emergency numbers. Provisioning of emergency numbers and associated types as specified in clause 4.1 bulle... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.1.3 How the solution solves the key issues
| How does the solution address the study item
- How to identify a Short Message to Emergency Response Centre based on the use of emergency numbers.
- This is based on the existing routing of SMS and the emergency number used by the UE which is provisioned with emergency numbers and associated types. PLMNs already supp... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.1.4 UE Functionality
| The UE that supports SMS to Emergency Centre over NAS shall support the functionality listed below (which needs to be added to TS 23.167 [9]):
- Identify the need to send SMS to Emergency Centre over NAS based on the use of emergency numbers.
- Performs domain selection for SMS to Emergency Centre over NAS as describ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.1.5 Domain Selection for UE originating SMS
| To allow for appropriate domain selection for SMS delivery, the Domain Selection for UEs originating SMS in TS 23.221 [12] needs to be augmented with the following:
- If the UE does not support SMS to Emergency Centre over IMS and if the UE supports SMS to Emergency Centre over NAS and UE detects that the SM destinati... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.2 Procedures
| The MO SMS over NAS in CM-IDLE (baseline) procedure in clause 4.13.3.3 of TS 23.502 [3] is modified with the following additions (in bold underline).
Figure 6.9.2-1: MO SMS over NAS
1. The UE performs domain selection for UE originating SMS as defined in clause 5.16.3.8 of TS 23.501 [2] if SMS delivery via non 3GPP... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.9.3 Impacts to Services, Entities and Interfaces
| UE:
- detects that the SM destination address is an emergency number based on existing mechanisms and replaces the SC Address that is configured with country code of the UEs serving PLMN and the emergency number e.g. +32112.
SMSF/MME:
- process all MO-SMS and detects from the SMSC Address and the destination address... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10 Solution #10: SMS over NAS in 4G/5G to Support SMS Delivery to the Emergency Response Centre
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10.0 High level principles
| To support SMS delivery to Emergency Response Centres via NAS, the following high-level solution principles apply for both EPS and 5GS:
- The UE may include an explicit indication towards MME/AMF to indicate the MO data containing SMS to Emergency Response Centre (EC).
- For cases where the UE cannot detect the SMS t... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10.1 Description
| In EPS, the UE delivers the SMS to EC using SMS over NAS. If the UE is in idle mode and detects the intent to send an SMS to EC, it initiates the UE-triggered Service Request procedure. If both the UE and the MME support Control Plane (CP) CIoT EPS Optimisation for SMS transfer, the UE initiates a Control Plane Service... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10.2 Procedures
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10.2.1 SMS in MME for 4G
| Figure 6.10.2.1-1 shows the procedures for SMS delivery to the Emergency Response Centre via SMS over NAS using the SMS in MME architecture option as described in Annex C of TS 23.272 [7].
Figure 6.10.2.1-1: Procedures for Emergency SMS Delivery via SMS over NAS in EPC
0. The UE attaches to the network using either... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10.2.2 SMS over NAS for 5G
| Figure 6.10.2.2-1 shows the procedures for SMS delivery to the Emergency Response Centre using SMS over NAS for 5G.
Figure 6.10.2.2-1: Procedures for Emergency SMS Delivery via SMS over NAS in 5G
0. The UE follows the procedures specified in clause 4.13.3 of TS 23.502 [3] for registration with SMS over NAS support.... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.10.3 Impacts to Services, Entities and Interfaces
| MME:
- MME uses SMS to EC indication to trigger location request.
AMF:
- AMF uses SMS to EC indication to trigger location request.
UE:
- UE indicates Emergency SMS indication towards MME/AMF.
SMSC:
- SMSC uses user data header information contained in TPDU to forward the message to a proper emergency service ne... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.11 Solution #11: Emergency SMS to EC over NAS
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.11.0 High level principles
| The following principles are applied to this solution:
- The UE is normally registered with the network and emergency numbers are provisioned, as specified in TS 23.167 [9].
- SMS to EC via NAS is supported by both the UE and the network.
- The UE detects a MO SM addressed to an EC.
- The UE sending a SM to EC may ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.11.1 Description
| Editor's note: EPS procedure is FFS.
This solution provides and end-to-end procedure to support the SMS to Emergency Response Centre via NAS.
After having registered to the network, the UE is authorised for SMS to EC. Depending on location and local regulation, it may also be provisioned with emergency numbers and co... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.11.2 Procedures
| Editor's note: EPS procedure is FFS.
Editor's note: The deviation for the procedure of the MO SMS over NAS Figure 13.3.3-1 in TS 23.502 [3] is FFS.
The below figure shows the procedure to send an SMS to EC over the 5GS.
Figure 6.11.2-1: Procedure for SMS over NAS
0.0 Emergency number/information provisioning to t... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.11.3 Impacts to Services, Entities and Interfaces
| The solution has the following impacts:
UE:
- Need to support indication to serving PLMN support for SMS to EC during Attach/Registration.
- Need to support a new NAS payload type for SMS to EC when initiating MO SMS to EC.
AMF:
- Need to support indication to UE of support for SMS to EC during Attach/Registration... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.12 Solution #12: Support of Short Message Service to Emergency Response Centre via SMS over IP
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9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.12.0 High-level solution Principles
| This solution aims to resolve Key Issue #3, i.e. "Support of Short Message Service to Emergency Response Centre via SMS over IP". The solution principles shall follow the architectural assumptions as described in clause 4.
To address the issue described in WT-1, the following solutions are proposed:
- UE sends a new ... |
9c43cb92c6eaab1e5d4db7c1c4cfea9a | 23.700-65 | 6.12.1 Description
| This solution addresses Key Issue #3.
- UE performs emergency IMS registration and sends SIP MESSAGE containing an R-URI set to the emergency number or sos-URN. The payload of the SIP MESSAGE contains the emergency SM.
- If E-CSCF queries the LRF and forwards the SIP MESSAGE to an IP-SM-GW able to handle emergency SM... |
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