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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2 User Plane
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.1 General
| The user plane stack consists of protocols for data transmission via:
- 5G ProSe Direct Communication, specified in clause 6.1.2.2;
- 5G ProSe UE-to-Network Relay, specified in clause 6.1.2.3;
- 5G ProSe UE-to-UE Relay, specified in clause 6.1.2.4.
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.2 UE - UE
| Figure 6.1.2.2-1 depicts a user plane for NR PC5 reference point, i.e. PC5 User Plane Protocol stack.
Legend:
- PC5-U: The SDAP/PDCP/RLC/MAC/PHY functionality is specified in TS 38.300 [12].
Figure 6.1.2.2-1: User Plane for NR PC5 reference point
PDCP SDU types of IP, Ethernet, Unstructured and Address Resoluti... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.3 5G ProSe UE-to-Network Relay
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.3.1 5G ProSe Layer-3 UE-to-Network Relay
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Legend:
- GPRS Tunnelling Protocol for the user plane (GTP‑U): This protocol tunnels user data between NG-RAN node and UPF as well as between the UPFs in the backbone network (not shown in the figure). GTP-U shall encapsulate all end user PDU packets.
- SMF controls the user plane tunnel establishment and establish... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.3.2 5G ProSe Layer-2 UE-to-Network Relay
| Figure 6.1.2.2.2-1 illustrates the protocol stack for the user plane transport, related to a PDU Session, including a 5G ProSe Layer 2 UE-to-Network Relay. The PDU layer corresponds to the PDU carried between the 5G ProSe Layer-2 Remote UE and the Data Network (DN) over the PDU session. The SDAP and PDCP protocols are ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.4 5G ProSe UE-to-UE Relay
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.4.1 5G ProSe Layer-2 UE-to-UE Relay
| Figure 6.1.2.4.1-1 illustrates user plane protocol stacks using a 5G ProSe Layer-2 UE-to-UE Relay. Security is established end-to-end between 5G ProSe End UEs as shown by the PDCP layer terminating in the 5G ProSe End UEs.
Figure 6.1.2.4.1-1: End-to-End User Plane protocol stacks using a 5G ProSe Layer-2 UE-to-UE Re... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.1.2.4.2 5G ProSe Layer-3 UE-to-UE Relay
| The user plane protocol stack of the PC5 unicast link between 5G ProSe End UEs and 5G ProSe Layer-3 UE-to-UE Relay reuses the user plane protocol stack defined in clause 6.1.2.2.
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.2 Procedures for Service Authorization and Provisioning to UE
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.2.1 General
| The procedures for service authorization and provisioning to UE may be initiated by the PCF (as described in clause 6.2.2), by the UE (as described in clause 6.2.4), or by the AF (as described in clause 6.2.5).
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.2.2 PCF based Service Authorization and Provisioning to UE
| For PCF based Service Authorization and Provisioning to UE, the Registration procedures as defined in clause 4.2.2.2 of TS 23.502 [5], UE Policy Association Establishment procedure as defined in clause 4.16.11 of TS 23.502 [5] and UE Policy Association Modification procedure as defined in clause 4.16.12 of TS 23.502 [5... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.2.3 PCF discovery
| PCF discovery and selection mechanism defined in clause 6.3.7.1 of TS 23.501 [4] applies with the following addition to enable a PCF instance is selected for 5G ProSe service and for UE:
- Based on the indication from the UE and/or UE subscription data during the Registration procedure as specified in clause 6.2.2, th... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.2.4 Procedure for UE triggered ProSe Policy provisioning
| The UE triggered Policy Provisioning procedure is initiated by the UE to request ProSe Policy/Parameter from the PCF when UE determines the 5G ProSe Policy/Parameter is invalid in the following cases:
- if the validity timer indicated in the 5G ProSe Policy/Parameter expires;
- if there are no valid parameters, e.g. ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.2.5 AF-based service parameter provisioning for ProSe over control plane
| For 5G ProSe service parameter provisioning (i.e. creating, updating and deleting), the procedure defined in clause 4.15.6.7 of TS 23.502 [5] is performed with the following considerations:
- The AF in TS 23.502 [5] is considered as ProSe Application Server in this specification.
- Service Description indicates 5G Pr... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3 5G ProSe Direct Discovery
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1 5G ProSe Direct Discovery with 5G DDNMF
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.1 Overview
| 5G ProSe Direct Discovery is defined as the process that detects and identifies another UE in proximity using NR radio signals. There are two types of 5G ProSe Direct Discovery supported over PC3a reference point: open and restricted, as defined in TS 23.303 [3]. 5G ProSe Direct Discovery can be a standalone service or... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.2 Overall procedure for 5G ProSe Direct Discovery (Model A)
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Figure 6.3.1.2-1: Overall procedure for Model A 5G ProSe Direct Discovery
This procedure is applied for open and restricted 5G ProSe Direct Discovery when the ProSe enabled UE is served by NG-RAN.
1. Service authorisation for 5G ProSe Direct Discovery services is performed for as defined in clause 6.2.
If the UE i... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.3 Overall procedure for 5G ProSe Direct Discovery (Model B)
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Figure 6.3.1.3-1: Overall procedure for Model B 5G ProSe Direct Discovery
This procedure is applied for restricted 5G ProSe Direct Discovery when the ProSe enabled UE is served by NG-RAN.
1. Service authorisation for 5G ProSe Direct Discovery services is performed as defined in clause 6.2.
If the UE is authorised ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.4 Discovery Request procedures
| The Discovery Request procedure can be used by the "announcing UE" or "monitoring UE" in order to be authorised to access the discovery resources and perform 5G ProSe Direct Discovery. The exact signalling procedures involving the UE, the 5G DDNMFs and the ProSe Application Server are specified in TS 23.303 [3] clause ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.5 Discovery Reporting procedures
| The Discovery Reporting procedure can be used by the "monitoring UE" (in Model A) and Discoverer UE (in Model B) to request the 5G DDNMF to resolve a matched ProSe Discovery Code(s) (ProSe Application Code for open discovery and ProSe Restricted Code for restricted discovery) and obtain the corresponding ProSe Applicat... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.6 Announcing Alert Procedures for restricted discovery
| When supported by the 5G DDNMF and the UE, the Announcing Alert procedure allows the 5G DDNMF to postpone the ProSe Restricted Code allocation, so that the announcing UE would be only triggered by this procedure to announce when the 5G DDNMF receives a Monitor Request from a UE in the vicinity of the announcing UE. Thi... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.1.7 Direct Discovery Update Procedures
| The 5G DDNMF can at any time update/revoke a previously allocated ProSe Application Code, or Discovery Filters. The UE can decide at any time to stop announcing a ProSe Application Code or monitoring set of Discovery Filter(s). The Direct Discovery Update procedure as specified in TS 23.303 [3] clause 5.3.6A.1 allows b... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2 5G ProSe Direct Discovery procedures over PC5 reference point
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.1 General
| A PC5 communication channel is used to carry the discovery message over PC5 and the discovery message over PC5 is differentiated from other PC5 messages by AS layer.
Both Model A and Model B discovery as defined in TS 23.303 [3] are supported:
- Model A uses a single discovery protocol message (Announcement).
- Mode... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.2 Group Member Discovery
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.2.1 General
| Group Member Discovery is applicable to public safety use and commercial services. To perform Group Member Discovery, the UE is configured with the related information as described in clause 5.2.
Group Member Discovery is a form of restricted discovery in that only users that are affiliated with each other can discove... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.2.2 Procedure for Group Member Discovery with Model A
| Depicted in Figure 6.3.2.2.2-1 is the procedure for Group Member Discovery with Model A.
Figure 6.3.2.2.2-1: Group Member Discovery with Model A
1. The announcing UE sends a Group Member Discovery Announcement message. The Group Member Discovery Announcement message includes the Type of Discovery Message, Announcer... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.2.3 Procedure for Group Member Discovery with Model B
| Depicted in Figure 6.3.2.2.3-1 is the procedure for Group Member Discovery with Model B.
Figure 6.3.2.2.3-1: Group Member Discovery with Model B
1. The discoverer UE sends a Group Member Discovery Solicitation message. The Group Member Discovery Solicitation message includes the Type of Discovery Message, Discovere... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.3 5G ProSe UE-to-Network Relay Discovery
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.3.1 General
| 5G ProSe UE-to-Network Relay Discovery is applicable to both 5G ProSe Layer-3 and Layer-2 UE-to-Network relay discovery for public safety use and commercial services. To perform 5G ProSe UE-to-Network Relay Discovery, the 5G ProSe Remote UE and the 5G ProSe UE-to-Network Relay are pre-configured or provisioned with the... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.3.2 Procedure for 5G ProSe UE-to-Network Relay Discovery with Model A
| Depicted in Figure 6.3.2.3.2-1 is the procedure for 5G ProSe UE-to-Network Discovery with Model A.
Figure 6.3.2.3.2-1: 5G ProSe UE-to-Network Relay Discovery with Model A
1. The 5G ProSe UE-to-Network Relay sends a UE-to-Network Relay Discovery Announcement message. The UE-to-Network Relay Discovery Announcement me... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.3.3 Procedure for 5G ProSe UE-to-Network Relay Discovery with Model B
| Depicted in Figure 6.3.2.3.3-1 is the procedure for 5G ProSe UE-to-Network Relay Discovery with Model B.
Figure 6.3.2.3.3-1: 5G ProSe UE-to-Network Relay Discovery with Model B
1. The 5G ProSe Remote UE sends a 5G ProSe UE-to-Network Relay Discovery Solicitation message. The 5G ProSe UE-to-Network Discovery Solicit... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.4 5G ProSe UE-to-UE Relay Discovery
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.4.1 General
| 5G ProSe UE-to-UE Relay Discovery is applicable to both 5G ProSe Layer-3 and Layer-2 UE-to-UE Relay Discovery for public safety use and commercial services. To perform 5G ProSe UE-to-UE Relay Discovery, the 5G ProSe End UE and the 5G ProSe UE-to-UE Relay are pre-configured or provisioned with the related information as... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.4.2 Procedure for 5G ProSe UE-to-UE Relay Discovery with Model A
| Depicted in Figure 6.3.2.4.2-1 is the procedure for 5G ProSe UE-to-UE Discovery with Model A.
Figure 6.3.2.4.2-1: 5G ProSe UE-to-UE Relay Discovery with Model A
1. The 5G ProSe UE-to-UE Relay has discovered other UEs in proximity and obtains the Direct discovery set from other UEs in proximity per RSC. (e.g. via a ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.4.3 Procedure for 5G ProSe UE-to-UE Relay Discovery with Model B
| Depicted in Figure 6.3.2.4.3-1 is the procedure for 5G ProSe UE-to-UE Relay Discovery with Model B.
Figure 6.3.2.4.3-1: 5G ProSe UE-to-UE Relay Discovery with Model B
1. The discoverer 5G ProSe End UE (UE-1) sends a 5G ProSe UE-to-UE Relay Discovery Solicitation message. The 5G ProSe UE-to-UE Relay Discovery Solici... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.4.4 Candidate 5G ProSe UE-to-UE Relay Discovery
| This procedure for candidate 5G ProSe UE-to-UE Relay Discovery to support the negotiated Relay reselection as described in clause 6.7.4 when the discoverer End UE discovers a candidate 5G ProSe UE-to-UE Relay.
The procedure for 5G ProSe UE-to-UE Relay Discovery with Model B (see clause 6.3.2.4.3) is used with the foll... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.4.5 Acquiring Direct discovery set by model A discovery
| The 5G ProSe UE-to-UE Relay may monitor Announcement messages from the 5G ProSe End UEs.
When receiving an Announcement message from a 5G ProSe End UE, the 5G ProSe UE-to-UE Relay may include the received protected user info (i.e. Application Layer ID) in the UE-to-UE Relay Discovery Announcement message as specified ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.5 5G ProSe Multi-hop UE-to-Network Relay Discovery
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.5.1 General
| 5G ProSe Multi-hop UE-to-Network Relay Discovery is applicable to both 5G ProSe Multi-hop Layer-3 and Layer-2 UE-to-Network relay discovery for public safety use and commercial services. To perform 5G ProSe Multi-hop UE-to-Network Relay Discovery, the 5G ProSe Remote UE, the 5G ProSe Intermediate UE-to-Network Relay an... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.5.4 Additional parameters announcement procedure over 5G ProSe Multi-hop UE-to-Network Relay
| Additional parameters announcement procedure outlined in figure 6.3.2.5.4-1 is used by a 5G ProSe Remote UE to request a 5G ProSe UE-to-Network Relay to announce additional parameters (using Model A). The Additional parameters announcement procedure specified in clause 6.5.1.3 is used with the following differences des... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.6 5G ProSe Multi-hop UE-to-UE Relay Discovery
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.6.1 General
| The 5G ProSe Multi-hop UE-to-UE Relay discovery may use one of the two different types of discovery operations, i.e. discovery for IP PDU type and discovery for non-IP PDU type, depends on the RSC for the discovery.
5G ProSe Multi-hop UE-to-UE Relay discovery of IP PDU type only needs to discover the presence of the 5... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.6.2 Procedure for 5G ProSe Multi-hop UE-to-UE Relay discovery of IP PDU type
| Depicted in figure 6.3.2.6.2-1 is the procedure for 5G ProSe Multi-hop UE-to-UE Relay discovery of IP PDU type, with Model A.
Figure 6.3.2.6.2-1: 5G ProSe Multi-hop UE-to-UE Relay Discovery of IP PDU type with Model A
1. The 5G ProSe Multi-hop UE-to-UE Relay is configured to operate IP PDU type of discovery based o... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.6.3 Procedure for 5G ProSe Multi-hop UE-to-UE Relay discovery of non-IP PDU type
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.6.3.1 Procedure for Multi-hop 5G ProSe UE-to-UE Relay Discovery of non-IP PDU type with Model A
| Depicted in Figure 6.3.2.6.3.1-1 is the procedure for Multi-hop 5G ProSe UE-to-UE Relay Discovery of non-IP PDU type with Model A.
Figure 6.3.2.6.3.1-1: 5G ProSe Multi-hop UE-to-UE Relay Discovery of non-IP PDU type with Model A
1. The 5G ProSe UE-to-UE Relay has discovered End UEs in proximity and obtains the Dire... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.3.2.6.3.2 Procedure for Multi-hop 5G ProSe UE-to-UE Relay Discovery of non-IP PDU type with Model B
| Depicted in Figure 6.3.2.6.3.2-1 is the procedure for Multi-hop 5G ProSe UE-to-UE Relay Discovery of non-IP PDU type with Model B.
Figure 6.3.2.6.3.2-1: Multi-hop 5G ProSe UE-to-UE Relay Discovery of non-IP PDU type with Model B
1. The Source End UE determines the Hop-Limit for discovery based on policy configurati... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4 5G ProSe Direct Communication
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.1 Broadcast mode 5G ProSe Direct Communication
| To perform 5G ProSe direct communication over PC5 reference point in broadcast mode operation, the UE is configured with the related information as described in clause 5.1.3.
Figure 6.4.1-1 shows the procedure for broadcast mode of 5G ProSe direct communication over PC5 reference point.
Figure 6.4.1-1: Procedure fo... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.2 Groupcast mode 5G ProSe Direct Communication
| Figure 6.4.2-1 shows the procedure for groupcast mode of 5G ProSe Direct Communication.
Figure 6.4.2-1: Procedure for groupcast mode 5G ProSe Direct communication
Steps 1 to 3 are optional, e.g. applicable for Application Layer managed group. Groupcast mode ProSe Direct communication can be performed without steps ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3 Unicast mode 5G ProSe Direct Communication
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.1 Layer-2 link establishment over PC5 reference point
| To perform unicast mode of ProSe Direct communication over PC5 reference point, the UE is configured with the related information as described in clause 5.1.3.
Figure 6.4.3.1-1 shows the layer-2 link establishment procedure for the unicast mode of ProSe Direct communication over PC5 reference point.
Figure 6.4.3.1-... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.2 Link identifier update for a unicast link
| Figure 6.4.3.2-1 shows the link identifier update procedure for a unicast link. When privacy requirements are configured for a ProSe Identifier associated with the unicast link, identifiers used for the unicast mode of 5G ProSe communication over PC5 reference point (e.g. Application Layer ID, Source Layer-2 ID and IP ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.3 Layer-2 link release over PC5 reference point
| Figure 6.4.3.3-1 shows the layer-2 link release procedure over PC5 reference point.
Figure 6.4.3.3-1: Layer-2 link release procedure
0. UE-1 and UE-2 have a unicast link established as described in clause 6.4.3.1.
1. UE-1 sends a Disconnect Request message to UE-2 in order to release the layer-2 link and deletes a... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.4 Layer-2 link modification for a unicast link
| Figure 6.4.3.4-1 shows the layer-2 link modification procedure for a unicast link. This procedure is used to:
- add new PC5 QoS Flow(s) in the existing PC5 unicast link.
- This covers the case for adding new PC5 QoS Flow(s) to the existing ProSe service(s) as well as the case for adding new PC5 QoS Flow(s) to new Pro... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.5 Layer-2 link maintenance over PC5 reference point
| The PC5 Signalling Protocol shall support keep-alive functionality that is used to detect if a particular PC5 unicast link is still valid. Either side of the PC5 unicast link can initiate the layer-2 link maintenance procedure (i.e. keep-alive procedure), based on for example triggers from the AS layer or internal time... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.6 Layer-2 link management over PC5 reference point for 5G ProSe UE-to-Network Relay
| The Layer-2 link procedures over PC5 reference point for unicast mode 5G ProSe Direct Communication as depicted from clause 6.4.3.1 to clause 6.4.3.5 can be used for the PC5 reference point between 5G ProSe Remote UE and 5G ProSe UE-to-Network Relay, with the following differences and clarifications:
- The Layer-2 lin... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.7 Layer-2 link management over PC5 reference point for 5G ProSe UE-to-UE Relay
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.7.1 Common part for Layer-2 link management over PC5 reference point for 5G ProSe UE-to-UE Relay
| For the 5G ProSe Communication via 5G ProSe UE-to-UE Relay as described in clause 6.7.1 and clause 6.7.2:
- The Direct Communication Request message over the first hop PC5 reference point includes:
- user info (i.e. Application Layer ID) of source 5G ProSe End UE: the identity of the source 5G ProSe End UE requesting... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.7.2 Layer-2 link management over PC5 reference point for 5G ProSe Layer-2 UE-to-UE Relay
| For the 5G ProSe Communication via 5G ProSe Layer-2 UE-to-UE Relay as described in clause 6.7.2, the description in clause 6.4.3.7.1 applies. In the case of ProSe communication via 5G ProSe Layer-2 UE-to-UE Relay, an end-to-end Direct Communication Request message between the source 5G ProSe End UE and the target 5G Pr... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.7.3 Layer-2 link management over PC5 reference point for 5G ProSe Layer-3 UE-to-UE Relay
| For the 5G ProSe Communication via 5G ProSe Layer-3 UE-to-UE Relay as described in clause 6.7.1, the description in clause 6.4.3.7.1 applies with following differences and clarifications:
- In the Security Procedure of the first hop PC5 reference point, the source 5G ProSe Layer-3 End UE provides the IP Address Config... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.7.4 Layer-2 link management over PC5 reference point for 5G ProSe UE-to-UE Relay Communication with integrated Discovery
| This clause is for the 5G ProSe UE-to-UE Relay Communication with integrated Discovery procedure as described in clause 6.7.3.
The Direct Communication Request message over the first hop PC5 reference point includes:
- user info (i.e. Application Layer ID) of source 5G ProSe End UE.
- (optional) user info (i.e. Appl... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.8 Layer-2 link management over PC5 reference point for 5G ProSe Multi-hop UE-to-Network Relay (based on Model A discovery)
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.8.1 Layer-2 Link establishment and management
| Each of the 5G ProSe Intermediate UE-to-Network Relay shall establish a Layer-2 Link with its parent Intermediate UE-to-Network Relay or the 5G ProSe UE-to-Network Relay, before it can serve the 5G ProSe Remote UE, or a child Intermediate UE-to-Network Relay. The 5G ProSe Intermediate UE-to-Network Relay shall establis... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.8.2 IP address/prefix management for 5G ProSe Layer-3 Multi-hop UE-to-Network Relay
| When IP based PDU session types are used by the 5G ProSe UE-to-Network Relay, the Intermediate UE-to-Network Relay needs to act as an IP Router.
The IP address allocation for Remote UE and Intermediate UE-to-Network Relay is performed by the 5G ProSe UE-to-Network Relay.
To support DHCP based IP address configuration... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.8.3 Relay reselection and mobility support
| There are two types of situations for parent relay reselection, i.e. for a single 5G ProSe Remote UE and for a 5G ProSe Intermediate UE-to-Network Relay with multiple child relays or 5G ProSe Remote UEs.
For a single 5G ProSe Remote UE, when the connection with an old parent relay (either a 5G ProSe Intermediate UE-to... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.9 Layer-2 link management over PC5 reference point for Multi-hop 5G ProSe UE-to-Network Relay (based on Model B Discovery)
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.9.1 Layer-2 Link establishment and management
| The Layer-2 link procedures over PC5 reference point for unicast mode 5G ProSe Direct Communication as depicted from clause 6.4.3.6 is used for the PC5 reference point among the 5G ProSe Remote UE, the 5G ProSe Intermediate UE-to-Network Relay and the UE-to-Network Relay after Model B Discovery, with the following diff... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.9.2 IP address/prefix management for 5G ProSe Layer-3 Multi-hop UE-to-Network Relay
| When IP based PDU session types are used by the 5G ProSe UE-to-Network Relay, the Intermediate UE-to-Network Relay acts as an IP Router.
The IP address allocation is performed by the 5G ProSe UE-to-Network Relay, as defined in clause 6.5.1.
DHCP based IP address configuration and IPv6 routing advertisement is perform... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.9.3 Relay reselection
| After being connected to the 5G ProSe UE-to-Network Relay, the 5G ProSe Remote UE and 5G ProSe Intermediate UE-to-Network Relay keep performing the measurement of the signal strength of PC5 unicast link with its parent Relay (Intermediate Relay or U2N relay) for relay reselection.
When a 5G ProSe Intermediate UE-to-Ne... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.10 Layer-2 link management for 5G ProSe Layer-3 Multi-hop UE-to-UE Relay
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.10.1 Layer-2 Link establishment and management for IP PDU type
| For the 5G ProSe Communication via 5G ProSe UE-to-UE Relay as described in clause 6.7.5.2:
- The Direct Communication Request message over the PC5 reference point (between a 5G ProSe End UE and 5G ProSe Multi-hop UE-to-UE Relay, or between 5G ProSe Multi-hop UE-to-UE Relays) includes:
- User info (i.e. Application La... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.4.3.10.2 Layer-2 link establishment and management over PC5 reference point for non-IP PDU type
| For the 5G ProSe Communication via Multi-hop 5G ProSe Layer-3 UE-to-UE Relay as described in clause 6.7.1a, the description in clause 6.4.3.7.1 applies with following differences and clarifications:
- The Direct Communication Request message over the PC5 reference point between source End UE and the first hop UE-to-UE... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5 5G ProSe UE-to-Network Relay Communication
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.0 General
| 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay may be performed with or without involving N3IWF for non-emergency service and for emergency service as specified in clause 5.4.4.
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.1 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay without N3IWF
| A 5G ProSe Layer-3 UE-to-Network Relay registers to the network (if not already registered). 5G ProSe Layer-3 UE-to-Network Relay establishes a PDU Session(s) or modifies an existing PDU Session(s) in order to provide relay traffic towards 5G ProSe Layer-3 Remote UE(s). PDU Session(s) supporting 5G ProSe Layer-3 UE-to-... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.2 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay with N3IWF support
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.2.1 Connection management via 5G ProSe Layer-3 UE-to-Network Relay with N3IWF support
| In order to relay 5G ProSe Layer-3 Remote UE's traffic via N3IWF (see clause 6.5.1.2.2 for N3IWF selection), the 5G ProSe Layer-3 UE-to-Network Relay needs suitable ProSe Policies configured for establishing a PDU Session associated with a UPF that conveys the traffic towards the N3IWF. A 5G ProSe Layer-3 UE-to-Network... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.2.2 N3IWF selection for 5G ProSe Layer-3 Remote UE procedure
| When the 5G ProSe Layer-3 Remote UE relays traffic over 5G ProSe Layer-3 UE-to-Network Relay that supports N3IWF, the 5G ProSe Layer-3 Remote UE selects the N3IWF using the N3IWF selection procedure that is specified in clause 6.3.6.2 of TS 23.501 [4] for untrusted non-3GPP access with the following differences.
To su... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.2.3 Mobility of 5G ProSe Layer-3 Remote UE between Direct and Indirect Network communication path
| When 5G ProSe Layer-3 Remote UE changes from Direct Network Communication to Indirect Network Communication path, TS 23.502 [5] clause 4.9.2.2 applies after the 5G ProSe Layer-3 Remote UE establishes PC5 connection to the 5G Layer-3 UE-to-Network Relay.
When 5G ProSe Layer-3 Remote UE changes from Indirect Network Com... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.3 Additional parameters announcement procedure
| Additional parameters announcement procedure outlined in figure 6.5.1.3-1 is used by a 5G ProSe Remote UE to request a 5G ProSe UE-to-Network Relay to announce additional parameters (using Model A) as defined in clause 5.8.3.
Figure 6.5.1.3-1: Additional parameters announcement procedure
1. 5G ProSe Remote UE has d... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.4 5G ProSe Communication via Multi-hop 5G ProSe Layer-3 UE-to-Network Relay without N3IWF (based on Model B Discovery)
|
Figure 6.5.1.4-1: Connection establishment via Multi-hop 5G ProSe Layer-3 UE-to-Network Relay without N3IWF support
Connection establishment via Multi-hop 5G ProSe Layer-3 UE-to-Network Relay without N3IWF support as described in clause 6.5.1.1 is used for Multi-hop UE-to-Network Relay after Model B Discovery with t... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.1.5 5G ProSe Communication via Multi-hop 5G ProSe Layer-3 UE-to-Network Relay with N3IWF after Model B Discovery
| 5G ProSe Communication via 5G ProSe Layer-3 UE-to-Network Relay with N3IWF as described in clause 6.5.1.2 is used for Multi-hop UE-to-Network Relay after Model B Discovery with the following differences and clarifications:
Figure 6.5.1.5-1: 5G ProSe Communication via Multi-hop 5G ProSe Layer-3 UE-to-Network Relay wi... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.2 5G ProSe Communication via 5G ProSe Layer-2 UE-to-Network Relay
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.2.1 Registration and Connection Management
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.2.1.1 Registration Management
| Registration Management for the 5G ProSe Layer-2 Remote UE and the 5G ProSe Layer-2 UE-to-Network Relay follows the principles and procedures defined in TS 23.501 [4] and TS 23.502 [5]. The 5G ProSe Layer-2 Remote UE and the 5G ProSe Layer-2 UE-to-Network Relay may be served by the same AMF or different AMFs.
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.2.1.2 Connection Management
| Connection Management for the 5G ProSe Layer-2 Remote UE and the 5G ProSe Layer-2 UE-to-Network Relay follows the principles and procedures defined in TS 23.501 [4] and TS 23.502 [5] with the following modifications.
The 5G ProSe Layer-2 UE-to-Network Relay may only relay data/signalling for the 5G ProSe Layer-2 Remot... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.2.2 Connection establishment
|
Figure 6.5.2.2-1: Connection Establishment for 5G ProSe Layer-2 UE-to-Network Relay
0. If in coverage, the 5G ProSe Layer-2 Remote UE and 5G ProSe Layer-2 UE-to-Network Relay may independently perform the initial registration to the network according to registration procedures in TS 23.502 [5].
1. If in coverage, t... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.2.3 Path switching between direct network communication path and indirect network communication path via 5G ProSe Layer-2 UE-to-Network Relay
| Procedure on indirect-to-direct path switching for 5G ProSe Layer-2 Remote UE in CM-CONNECTED with RRC_CONNECTED state is specified in TS 38.300 [12]. Xn based (as defined in clause 4.9.1.2 of TS 23.502 [5]) and N2 based (as defined in clause 4.9.1.3 of TS 23.502 [5]) Handover procedure is used for inter-gNB indirect-t... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.3 5G ProSe UE-to-Network Relay reselection
| After being connected to the 5G ProSe UE-to-Network Relay, the 5G ProSe Remote UE keeps performing the measurement of the signal strength of PC5 unicast link with the 5G ProSe UE-to-Network Relay for relay reselection.
The 5G ProSe UE-to-Network Relay discovery procedures defined in clause 6.3.2.3 are used to discover... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.4 5G ProSe Remote UE traffic handling for 5G ProSe UE-to-Network Relay support
| For the 5G ProSe Remote UE to access the service via 5G ProSe UE-to-Network Relay, the following apply:
- The application traffic on the 5G ProSe Remote UE is managed by URSP rules (with consideration of local configurations), following the procedure defined in clauses 6.1.2.2.1 and 6.6.2.3 of TS 23.503 [9]. The URSP ... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.5 Procedures for Communication Path Switching between Two UE-to-Network Relays
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.5.1 General
| The communication path switching between two UE-to-Network Relays includes the following scenarios:
- Layer-3 UE-to-Network Relay with N3IWF switching from/to Layer-3 UE-to-Network Relay with N3IWF.
- Layer-3 UE-to-Network Relay without N3IWF switching from/to Layer-3 UE-to-Network Relay without N3IWF.
- Layer-3 UE-... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.5.5.2 Procedures for Communication Path Switching between UE-to-Network Relays
| This clause specifies the communication path switching procedures between two UE-to-Network Relays.
When performing the path switching between two 5G ProSe Layer-3 UE-to-Network Relay without N3IWF, or between 5G ProSe Layer-3 UE-to-Network Relay without N3IWF and 5G ProSe Layer-2 UE-to-Network Relay, or between 5G Pr... |
4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.6 Procedures for Service Authorization to NG-RAN
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.6.1 General
| In order to support PC5 radio resource control in NG-RAN, ProSe service Authorisation information and PC5 QoS parameters for ProSe need to be made available in NG-RAN. This clause describes the corresponding procedures and aspects.
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4d761cc8095b5982244110685dcb04f8 | 23.304 | 6.6.2 Registration procedure
| The Registration procedure for UE is performed as defined in TS 23.502 [5] clause 4.2.2.2 with the following additions:
- The UE includes the 5G ProSe Capability as part of the "5GMM capability" in the Registration Request message. The AMF stores the 5G ProSe Capability for 5G ProSe operation.
- The 5G ProSe Capabili... |
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