Content for  TR 22.803  Word version:  12.2.0

This use case describes a situation where ProSe is used to augment user location and presence information that is already present in 3GPP networks.

Carmen is using a UE that enhances its location information by means of ProSe and she is able to access all the services activated in her network profile (Presence, RCS etc.). Carmen enters a meeting room and so she sets her status to "In a meeting" in her presence client.

During the discussion, Carmen realizes that she needs expert support and so she checks her presence client to see if one of her colleagues is close to the meeting room and is currently in "Free" status. The location information, integrated with information provided by ProSe about UEs in proximity, shows 10 colleagues in the area, three of them in close proximity and one of them she knows is an expert on the subject. She starts an RCS chat with him to ask for direct support at the meeting. Carmen and her colleague haven't perceived anything unusual in their services activities and the use of ProSe was transparent to the different activated services in their user profiles. The effect of ProSe is that it integrates user location information with location information available by other means.

None

[PR.39] [PR.40] [PR.41] [PR.42]

This use case describes a scenario involving a large number of UEs, and proposes ProSe requirements for dense environments.

• Smart parking meters are ProSe-enabled UEs;
• John's car has a UE which is ProSe-enabled.

• John is going to the football stadium to attend a game. As he drives around the stadium parking lot, parking meters in unoccupied parking spaces broadcast their presence.
• John's car's UE receives these broadcasts and the car's parking application which uses ProSe, displays the results
• John chooses a spot, and the parking application responds by assisting him to locate the spot, and pay for parking once he enters it. The parking application may make use of additional info (e.g., map, payment credentials, etc.) obtained by means other than ProSe.
• There may be hundreds or thousands of other users with ProSe-enabled UEs running parking applications and other applications making use of ProSe concurrently.

John and the Stadium Management experienced convenience and improved efficiency through proximity based services in the presence of many other ProSe enabled UEs.

[PR.43]

This use case describes how WLAN direct communication can be used between ProSe-enabled UEs.

• Bob and John are subscribers to a mobile data service from an MNO;
• Bob and John both carry UEs that have WLAN capabilities;
• Both UEs are enabled for ProSe Discovery and Communication;
• Bob and John use ProSe-enabled applications on their UEs;
• The 3GPP network has the capability to provide WLAN configuration information to ProSe-enabled UEs;
• Bob has clicked the ProSe-enabled UE to send an HD video to John.

• The 3GPP EPC determines proximity of Bob's and John's UEs and provides them with WLAN configuration information to assist with WLAN direct connection establishment.
• Bob's and John's UEs use the configuration information to verify feasibility of the WLAN direct connection and establish ProSe-assisted WLAN direct communications.
• The ProSe-enabled application on Bob's UE streams the HD video to the ProSe-enabled application on John's UE using the established WLAN connection.

John has received Bob's HD video via the ProSe-enabled application on his UE.

[PR.44] [PR.45] [PR.100] [PR.101] [PR.102] [PR.103] [PR.104]

This use case demonstrates service management and continuity for ProSe Communication via WLAN.

• Bob and John are subscribers to a mobile data service from an MNO.
• Bob and John carry UEs that have WLAN capabilities.
• Both UEs are enabled for ProSe Discovery and Communication.
• The 3GPP System is capable of switching an infrastructure communication path to a WLAN ProSe communication path and back again.

• Bob and John are engaged in a data session (including one or more flows) that is being routed over the MNO's core network infrastructure.
• When Bob and John move within WLAN communication range, the 3GPP System switches their data session to the WLAN ProSe communication path.
• Later, when Bob and/or John move out of WLAN communication range, the 3GPP System switches their data session back to the MNO's infrastructure path.

None.

[PR.47] [PR.48] [PR.105] [PR.106] [PR.107]

The operator may provide ProSe capability features in a series of APIs to third-party application developers for application development. Benefiting from the cooperation between the operator and third-party application developers, the user can download and use a rich variety of new ProSe applications created by third-party application developers. If the third-party application developer wants to use Prose capability features to develop a new application, the third-party application developer may need to sign a contract with the operator at first. The contract may include a third-party application developer ID, the application ID and so on. The operator will store the contracted information of this third-party application developer in their network. The third-party application developer develops new ProSe applications using the ProSe APIs. Users receive the ProSe applications created by the third-party application developers from various application distribution channels, e.g. an Operator application distributor or App Store. When the user activates the application, the application will request access to ProSe capability features. At operator defined intervals, the operator's network interacts with the ProSe-enabled UE to identify, authenticate, authorize, charge and enable ProSe capability features. In order to reduce the interaction frequency between the operator'network and the ProSe-enabled UE, the frequency of this interaction should be considered and may be per operator-configuration of the UE.

• ProSe capability features are provided in a consistent series of APIs.
• Third-party application developer B signs a contract with Operator A for using the ProSe APIs.
• Third-party application developer B develops a ProSe application X based on these ProSe APIs.
• Third-party application developer C doesn't sign a contract with Operator A for using the ProSe APIs.
• Third-party application developer C develops a ProSe application Y based on these ProSe APIs.
• Alice is a subscriber of Operator A.
• Alice downloads and installs the ProSe application X and ProSe application Y on her ProSe-enabled UE.

• Alice runs the ProSe application X on her ProSe-enabled UE.
• ProSe application X requests the ProSe-enabled UE to use ProSe capability features by ProSe APIs.
• Operator A's network interacts with Alice's ProSe-enabled UE to authenticate and authorize the ProSe application X.
• The ProSe application X is authorized to use ProSe capability features.
• Alice runs the ProSe application Y on her ProSe-enabled UE.
• ProSe application Y requests the ProSe-enabled UE to use ProSe capability features by ProSe APIs.
• Operator A's network interacts with Alice's ProSe-enabled UE to identify, authenticate and authorize the ProSe application Y.
• The ProSe application Y is rejected to use ProSe capability features.

• Alice enjoys the ProSe capability feature enhancements on Application X.
• Charging data are generated and collected for ProSe capability feature access of application X.
• Charging data are generated and collected for the rejected attempt to use ProSe capability feature by application Y.

[PR.49] [PR.89] [PR.90] [PR.50] [PR.88] [PR.52]

• Announce - a service method by which an MNO's authorized application is able to allow a UE to be discovered by other UEs interested in it This method shall be consistent with ProSe Discovery requirements, and subject to network control.
• Monitor - a service method that shall enable an MNO's authorised application to allow a UE to discover other UEs of interest for this application. This method shall be consistent with ProSe Discovery requirements, and subject to network control.
• Communicate - a service method that shall enable an application t o initiate communication with the authorised application on another UE in its proximity. The Network can then apply Prose Communication, if appropriate.

This use case describes how E-UTRAN infrastructure communication and WLAN ProSE communication can be concurrently used between ProSe enabled UEs.

• Mary, Bob and John are subscribers to mobile data service from an MNO.
• Mary, Bob and John carry UEs that have WLAN capabilities.
• Three UEs are within proximity and enabled for ProSe Discovery and Communication. Bob and John are within the WLAN range and have entered a preference to use WLAN ProSe communication.

• Mary chats with John after Mary's and John's UEs establish an E-UTRAN infrastructure communication.
• Bob's UE looks for John's UE, triggering Bob's UE to discover John's UE using ProSe Discovery.
• Bob's UE streams the HD video to John's UE after establishing WLAN ProSe communication, while Mary continues to chat with John using their existing E-UTRAN infrastructure communication.

• Mary continues to chat with John.
• John has received Bob's HD video.

[PR.108] [PR.109]

This use case describes network data offloading via WLAN ProSe Communication.

Bob and John are subscribers to a mobile data service from an MNO. Bob and John carry UEs that have WLAN capabilities. Both UEs are enabled for ProSe Discovery and Communication.

Bob and John are engaged in a data session (including one or more flows) that is being routed over the MNO's core network, which is currently congested. Due to the congestion, the 3GPP EPC checks if any data sessions can be offloaded and finds that Bob's and John's data session can be offloaded to a WLAN direct connection. The 3GPP EPC sends them a request to connect directly via WLAN. Bob's and John's UEs determine whether they are willing to connect directly via WLAN. After Bob's and John's UEs respond to the 3GPP EPC positively, the 3GPP EPC moves their data session from the infrastructure path to their WLAN direct path in order to reduce the system congestion. Later, when the MNO's network congestion subsides, the 3GPP EPC shall be able to request to switch Bob's and John's data session back to the MNO's infrastructure path.

MNO's network congestion is reduced.

[PR.110]