Content for TR 22.803 Word version: 12.2.0
5.2.7 ProSe Group
5.2.8 ProSe Broadcast
5.2.9 ProSe Relay
5.2.10 ProSe Hybrid and Range Extension
5.2.11 ProSe Range
5.2.12 Public Safety Implicit Discovery
5.2.13 Co-existence of ProSe Communication and E-UTRAN communication
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5.2.7 ProSe Group p. 29
5.2.7.1 Description p. 29
This use case describes the scenario where a user wants to communicate the same information concurrently to two or more other users using ProSe Group Communications. The UEs of all users in the scenario belong to a common communications group.
5.2.7.2 Pre-Conditions p. 29
An operator offers a service, which makes use of the ProSe feature.
Officer A, Officer B, and Officer C use ProSe-enabled public safety UEs.
Officer A, B, and C's UEs are configured to belong to communications group X.
Officer C has disabled ProSe Discovery on his/her UE.
Officer A, Officer B, and Officer C are subscribed to a Public Safety service that allows them to use ProSe.
Officer A's UE has discovered Officer B's UE via ProSe Discovery.
Officer A's UE has not discovered Officer C's UE via ProSe.
Officer A, Officer B, and Officer C's UEs may or may not be in E-UTRAN coverage.
5.2.7.3 Service Flows p. 29
Officer A's UE transmits data using ProSe Group Communications to Officer B and Officer C's UEs concurrently.
5.2.7.4 Post-Conditions p. 29
None.
5.2.7.5 Potential Requirements p. 29
[PR.61]
A Public Safety UE in or out of E-UTRAN coverage shall be capable of transmitting data to a group of Public Safety UEs using ProSe Group Communications with a single transmission, assuming they are within transmission range, authenticated and authorized.
[PR.118]
Authentication shall allow for security-enablement of large groups, regardless of whether group members have discovered each other in or out of E-UTRAN coverage.
[PR.62]
A Public Safety UE in or out of E-UTRAN coverage shall be capable of transmitting data to a group of Public Safety UEs directly using ProSe Group Communications.
[PR.63]
A Public Safety UE in or out of E-UTRAN coverage shall be capable of receiving a ProSe Group Communications transmission, of which it is a group member, regardless of whether or not it has been discovered by the transmitting UE.
5.2.8 ProSe Broadcast p. 30
5.2.8.1 Description p. 30
This use case describes the scenario where a given UE initiates a ProSe Broadcast Communication transmission to all UEs within transmission range.
5.2.8.2 Pre-Conditions p. 30
An operator offers a service, which makes use of the ProSe feature.
Fire-fighters A-D, E-H and an incident commander use ProSe-enabled public safety UEs.
Fire-fighters A-D, E-H and an incident commander are subscribed to a Public Safety service that allows them to use ProSe.
Fire-fighters A-D's UEs are configured to belong to communications group X.
Fire-fighters E-H's UEs are also configured to belong to communications group Y, which is separate from fire-fighters A-D.
The incident commanders UE is configured to belong to communication group X and communication group Y.
The fire-fighters may or may not be in E-UTRAN coverage.
5.2.8.3 Service flows p. 30
After arriving at the scene of a fire, fire-fighters A-D's UEs discover each other and communicate among themselves in communications group X using ProSe Group Communications.
Later, fire-fighters E-H also arrive on the fire scene and communicate among themselves in communications group Y using ProSe Group Communications.
At some point, the incident commander wants to provide the same information concurrently to all of the fire-fighters at the scene of the incident within transmission range.
The incident commander's UE transmits a ProSe Broadcast Communications message to all of the fire-fighters' UEs. A single transmission is received by all of the fire-fighters' UEs rather than individual transmissions being sent to each of the fire-fighters.
5.2.8.4 Post-Conditions p. 30
None.
5.2.8.5 Potential Requirements p. 30
[PR.64]
An authorized public safety UE in or out of E-UTRAN coverage shall be capable of sending a broadcast message to all authorized public safety UEs within transmission range, regardless of group membership, using ProSe Broadcast Communications in a single transmission.
5.2.9 ProSe Relay p. 30
5.2.9.1 Description p. 30
This use case describes the scenario where a given UE acts as a communication relay for one or more UEs.
5.2.9.2 Pre-Conditions p. 30
An operator offers a service, which makes use of the ProSe feature.
Officer A, Officer B, and Officer C use ProSe-enabled public safety UEs.
Officer B's UE has a relay capability allowing it to receive and re-transmit ProSe Communications.
Officer A, Officer B, and Officer C are subscribed to a Public Safety service that allows them to use ProSe.
Officer A's UE, Officer B's UE, and Officer C's UE have each been configured to belong to communications group X.
Officer A's UE is within transmission range of Officer B's UE, and Officer B's UE is within transmission range of Officer C's UE, but Officer C's UE is not within transmission range of Officer A's UE.
Officers A, B and C's UEs may or may not be in E-UTRAN coverage.
5.2.9.3 Service Flows p. 31
Officer A wants to communicate with Officer B and Officer C in communications group X via ProSe Group Communications.
Officer B enables his/her UE to act as a relay for ProSe Group Communications.
Officer A's UE transmits a message to Officer B's UE using ProSe Group Communications.
Officer B's UE relays (receives and then re-transmits) the communication from Officer A's UE to Officer C's UE, all using ProSe Group Communications.
Officer B continues to act as a ProSe Group Communications relay until Officer C is back within transmission range of Officer A and Officer B.
5.2.9.4 Post-Conditions p. 31
None.
5.2.9.5 Potential Requirements p. 31
[PR.65]
An authorized public safety UE may be capable of acting as a relay in or out of E-UTRAN coverage for other public safety UEs.
[PR.66]
An authorized public safety UE shall be capable of being enabled/disabled by a user or system in or out of E-UTRAN coverage to act as a relay for other public safety UEs.
[PR.67]
The user of a ProSe-enabled public safety UE acting as a relay should not perceive service degradation due to its use as a relay in or out of E-UTRAN coverage.
5.2.10 ProSe Hybrid and Range Extension p. 31
5.2.10.1 Description p. 31
This use case describes the scenario where a given UE communicates using the network infrastructure and using ProSe Communications concurrently. This use case also describes the scenario where a given UE acts as a communication relay for one or more UEs so that the latter UE(s) can get communication towards the network.
5.2.10.2 Pre-Conditions p. 31
An operator offers a service, which makes use of the ProSe feature.
Officer A, Officer B, and Officer C use ProSe-enabled public safety UEs.
Officer A's UE has a relay capability allowing it to receive and re-transmit UE and network-originated communications.
Officer A, Officer B, and Officer C are subscribed to a Public Safety service that allows them to use ProSe.
Officer A's UE, Officer B's UE, and Officer C's UE have each been configured to belong to communications group X.
Officer A and B are within E-UTRAN coverage and not in ProSe Group Communications range of each other, while Officer C is out of E-UTRAN coverage but within ProSe Group Communications transmission range of Officer A.
5.2.10.3 Service Flows p. 32
Officer A communicates information to Officer B and C in communications group X.
When Officer A transmits, Officer A's and Officer C's UEs exchange data using ProSe Group Communications, while Officer A's and Officer B's UEs exchange data using group communications via the network.
Officer C wants to communicate with Officer B, who can be reached via the network, in communications group X via ProSe Group Communications.
Officer A enables his/her UE to act as a relay for ProSe Communications and Network Communication.
Officer A's UE relays (receives and then re-transmits) the communication between Officer B's UE and Officer C's UE.
Officer A is able to continue to act as the relay until Officer B is back within transmission range of Officer A and Officer C.
5.2.10.4 Post-Conditions p. 32
None.
5.2.10.5 Potential Requirements p. 32
[PR.68]
An authorized public safety UE shall be capable of concurrent communication using the network infrastructure and off network ProSe whether or not ProSe Discovery is used.
[PR.69]
An authorized public safety UE shall be capable of being enabled/disabled to act as a relay to/from the network for other public safety UEs unable to access the network.
[PR.70]
Based on operator policy and user choice, service continuity should be provided so that the system shall be able to initiate or move user traffic session of a ProSe-enabled UE that has lost connection to the network to a communication path via a Prose-enabled UE that is in ProSe communication range and has connectivity to the network.
[PR.119]
In addition, the system shall be able to move the user traffic session back to the infrastructure communication path when the UE moves back into E-UTRAN coverage. The user may inhibit the switch back to the infrastructure communication path.
[PR.71]
Based on operator policy, the operator network shall be able to control the relaying of network services between UEs communicating by means of ProSe.
[PR.72]
Based on operator policy, the operator network shall be able to control the ProSe communication between public safety UEs out of E-UTRAN coverage that are in ProSe communication with a public safety UE in E-UTRAN coverage, which is acting as a relay.
5.2.11 ProSe Range p. 32
5.2.11.1 Description p. 32
This use case describes the scenario where a given UE is within a building and uses ProSe Communications to exchange user traffic to/from UEs outside of a building.
5.2.11.2 Pre-Conditions p. 32
An operator offers a service, which makes use of the ProSe feature.
Officer A, Officer B, and Officer C use ProSe-enabled public safety UEs.
Officer A, Officer B, and Officer C are subscribed to a Public Safety service that allows them to use ProSe.
Officer C has disabled ProSe Discovery on his/her UE.
Officer A is inside a building, and Officer's B and C are outside of the same building. Officer A is not within E-UTRAN coverage; officers B and C are within E-UTRAN coverage.
5.2.11.3 Service Flows p. 33
Officer A's UE discovers Officer B's UE via ProSe Discovery.
Officer A's UE does not discover Officer C's UE via ProSe Discovery.
Officer A's UE exchanges data using ProSe Communications to/from Officer B and Officer C's UEs.
5.2.11.4 Post-Conditions p. 33
None.
5.2.11.5 Potential Requirements p. 33
SA1 would encourage solutions taking into account the following expectation:
[PR.73]
It is desirable that an authorized public safety UE in or out of E-UTRAN coverage supports the capability to exchange data via ProSe from within a building to public safety UEs outside the building using a power class 3 E-UTRA UE [9].
5.2.12 Public Safety Implicit Discovery p. 33
5.2.12.1 Description p. 33
This use case describes a scenario for ProSe public safety in which public safety officials need to communicate without an explicit ProSe Discovery event.
5.2.12.2 Pre-Conditions p. 33
Public safety officials arrive at a disaster site with their ProSe-enabled UEs. ProSe Discovery has been disabled on each UE by agreement among the officials.
The officials'
UEs may or may not be in E-UTRAN coverage.
5.2.12.3 Service Flows p. 33
The public safety officials determine the situation requires them to use ProSe Communication. They activate ProSe Communication on their UEs and communicate with each other as they proceed about their duties on the site. As the officials move about the site, communications will be received when the UEs are within communication range.
5.2.12.4 Post-Conditions p. 33
As ProSe Discovery is not performed, there is no explicit prior indication whether communication with a particular official will succeed at any given time. For this situation, that is an acceptable level of communication.
5.2.12.5 Potential Requirements p. 33
[PR.74]
Authorized ProSe-enabled public safety UEs in or out of E-UTRAN coverage shall be able to communicate with other authorized ProSe-enabled public safety UEs whether or not ProSe discovery is used.
[PR.75]
The ProSe-enabled public safety UEs shall provide the ability for the end user to activate/deactivate ProSe Communication in or out of E-UTRAN coverage, whether or not ProSe discovery is used.
[PR.76]
A ProSe-enabled public safety UE shall support independent activation/deactivation of ProSe Discovery and ProSe Communication in or out of E-UTRAN coverage.
5.2.13 Co-existence of ProSe Communication and E-UTRAN communication p. 33
5.2.13.1 Description p. 33
This use case describes a scenario in which ProSe Discovery and Communications has been established between two UEs when no E-UTRAN coverage is available. The two UEs, while still performing ProSe Communications, then move back into E-UTRAN coverage with minimal impact on communication via the network.
5.2.13.2 Pre-Conditions p. 34
Officer A and Officer B are at a disaster site with ProSe-enabled UEs.
Officer A and Officer B are underground where there is no E-UTRAN coverage.
Officers A's UE and Officer B's UE are within proximity of each other.
Officer C and Officer D are at a disaster site with ProSe-enabled UEs and are within E-UTRAN coverage.
Officer C and Officer D are in communication via the E-UTRAN network.
5.2.13.3 Service Flows p. 34
Officers A's UE discovers Officer B's UE using ProSe Discovery.
Officer A establishes ProSe Communication with Officer B.
Officer A and Officer B emerge from the building and are once again in E-UTRAN coverage and are in proximity of Officers C and D.
5.2.13.4 Post-Conditions p. 34
ProSe Communication continues between Officers A and B.
Communication via the E-UTRAN network continues between Officers C and D.
5.2.13.5 Potential Requirements p. 34
[PR.123]
ProSe-enabled public safety UEs when using ProSe Communications should have no impact on communication between other UEs communicating via E-UTRAN, and vice versa.
