3GPP TSG-SA WG1 Meeting #66 S1-141007
Sapporo, Japan, 12-16 May 2014 (revision of S1-140007, S1-135276 and S1-135024)
Titl...
facilities, widespread power outages, and lack of access by restoration crews and equipment to the
impacted area. In such ...
A NeNB mounted on the terrestrial vehicle is deployed in the coverage of theeNB andconnected to the Evolved Packet
Core (E...
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Deployment on Remote Territory (S1-141007)

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When an emergency, disaster or any unexpected event occurs, communication infrastructure plays an essential role. For larger effected area, an eNB deployed in high attitude such as high tower can reduce network coverage holes for public safety UEs. Due to deployment on remote territory, the eNB is usually connected to the Evolved Packet Core (EPC) via limited backhaul such as satellite link. Figure 1 depicts a network architecture providing wireless network coverage via satellite backhaul link. In many critical incident related scenarios, the terrestrial infrastructure might be seriously compromised and cannot guarantee reliable communications for rescue teams. During the first 72 hours of a response, communications maybe partially or completely disrupted due to damaged facilities, widespread power outages, and lack of access by restoration crews and equipment to the impacted area. In such cases, the eNB could quickly provide E-UTRAN backhaul link to temporarily replace the ground communication infrastructure, and it can also fast recover the wireless networks to enable critical information access such as the communication for rescue missions or emergency services. Therefore, it can ensure the continued ability to communicate between Public Safety officers within its coverage even if it lost its backhaul link.

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Deployment on Remote Territory (S1-141007)

  1. 1. 3GPP TSG-SA WG1 Meeting #66 S1-141007 Sapporo, Japan, 12-16 May 2014 (revision of S1-140007, S1-135276 and S1-135024) Title: Deploymenton RemoteTerritory Agenda Item: 8.2FS_IOPS: Study on Isolated E-UTRAN Operation for Public Safety Source: III, ITRI Contact: Yi-Hsueh Tsai (lucas@iii.org.tw), Hsuan-Li Lin, Tsung-Yu Tsai,Terng-Yin Hsu, Jian-Ya Chu Shubhranshu (shubhranshu@itri.org.tw), Zheng Yan-Xiu(zhengyanxiu@itri.org.tw) Introduction When an emergency, disaster or any unexpected event occurs, communication infrastructure plays an essential role.For larger effected area, aneNB deployedin high attitude such as high tower can reduce network coverageholes for public safety UEs[1][2]. Due to deploymentonremoteterritory, theeNB is usually connected to the Evolved Packet Core (EPC) via limited backhaul such as satellite link. Figure 1 depicts a network architecture providingwireless network coveragevia satellite backhaul link. Figure 1eNB deployed on Remote Territory In many critical incident related scenarios, the terrestrial infrastructure might be seriously compromised and cannot guarantee reliable communications for rescue teams. During the first 72 hours of a response, communications maybe partially or completely disrupted due to damaged Relay link Oscar NeNB eNB with limited backhaul such as satellite link Infrastructure Communication RogerPeter Smith Satellite link EPC macro eNB prioritizing mission critical connection, (for example a group call) with degradation of QoS
  2. 2. facilities, widespread power outages, and lack of access by restoration crews and equipment to the impacted area. In such cases, the eNB could quickly provide E-UTRAN backhaul link to temporarily replace the ground communication infrastructure, and it can also fast recover the wireless networks to enable critical information access such as the communication for rescue missions or emergency services. Therefore, it can ensure the continued ability to communicate between Public Safety officers within its coverage even if it lost its backhaul link. Discussion During the Taipei meeting, a reviseduse case and related requirements [3]wereproposed for Public Safety. However, there was noconsensus during the meeting. Therefore, in this contribution, we proposea revised use case with related requirements to provide wireless network coverageon remote territory for public safety UEs for inclusion in the current TR 22.897 [4]. Reference [1] International Telecommunication Union (ITU), “Radio Communications for Emergency Response and Disaster Relief” (http://www.itu.int/ITU-D/asp/CMS/Events/2012/NBTC- disaster/S6_MrBhatia.pdf) [2] REV-090003-r1, “LTE-Advanced Physical Layer” [3] S1-140007, “Isolated EUTRAN Operation on Aerial Platform” [4] TR 22.897v1.0.0, “Study on Isolated E-UTRAN Operation for Public Safety (Release 13)” Proposal To include the following use case and requirements into section 5 of TR 22.897 V1.0.0. *** First Change *** 5.x Deployment on Remote Territory 5.x.1 Description This use case describes the situation where UEs can establish and maintain user traffic sessions via aneNB providing wireless networkcoverageon remote territoryand connected to the Evolved Packet Core (EPC) via a limited backhaul link. 5.x.2 Pre-conditions An eNB is installed in high tower on the mountain hill or mounted on amobile platform to offer Public Safety UEs wireless network access serviceon remote territory and connected to the Evolved Packet Core (EPC) via a limited backhaullink such as a satellite link.
  3. 3. A NeNB mounted on the terrestrial vehicle is deployed in the coverage of theeNB andconnected to the Evolved Packet Core (EPC) viathe eNB. Oscar, Peter, Roger,and Smithuse Public Safety UEs, where Oscar’s, Peter’s, and Roger’s UEs are within the coverage of theeNBbut Smith’s UE is not;in addition,Roger’s UEis within the coverage of aNeNB. 5.x.3 Service flows Oscar wants to communicate with Peter. Both Oscar’s and Peter’s UEs establish a communication link with the eNB and communicate to each other. Roger wants to communicate with Oscar and Peter. Roger’s UE establishes communication links withNeNBsand communicate to each other. Oscar and Peter want to establish a group call with Smith. 5.x.4 Post-conditions In order to prevent the traffic traverse back to the EPC through the limited backhaul link such as satellite link, the communicationdata path could also be locally routed between two UEs via the eNB but does not traverse to/from the EPC. In order to establishthe group call, theeNB deprioritizes non-mission critical service vialimited backhaul link such as satellite link. Afterward, Smith’s UE might establish communication link with degradation ofQoSvia a limited backhaul link of the eNB and communicate to each other. When the backhaul link between the eNB and EPC becomes temporarily unavailable,Oscar’s, Peter’s and Roger’sUEs continue their existing communications via theeNB and the NeNB, and temporary discontinue their existing communications with Smith’s UE. 5.x.5 Potential Requirements Subject to operator policy, an eNB connected by a NeNB viaE-UTRA backhaul link (such as S1 or Un interface) shall be able to locally route data pathbetween the UE connected to the eNB and the UE connected to theNeNBregardless the eNB is connected to EPC or not. Subject to operator policy, an eNB shallbe capable of prioritizing mission critical connection (for example a group call) with degradation ofQoS(such as longer latency or using low-bit-rate voice codec) via its limited backhaul link (such as a satellite link). *** End of First Change ***

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