Dynamic Resource Scheduling Algorithm for Public Safety Network Hyunwoo Kim

Multimedia(Voice, Video, Data...) Public Protection + Disaster Relief Ⅰ. Introduction(1) LTE Based Public Safety Network Multimedia(Voice, Video, Data...) Airports Military Cities Schools Hospitals Utilities Citizens & Civil defense Citizen Alerts Database Query Video Intelligence Multimedia Groups Predictive Analytics Evidence Gathering Crime Prevention Fire Emergency Police Public Protection + Disaster Relief Mobile data traffic expects to increase 1000 fold from 2010 to 2020 Lte-advanced shall support wider bandwidth like 100MHz, LTE shall support 20MHz, so frequency resource is lack. Also, multiple operator and various services use LTE technologies. For example, volte / data/ enterprise for company / public safety for government/ railway and maritime Multiple lte networks has co-located area and intra-operator interference. LTE networks use same frequency has converge overlap. Intra-operator interference is inevitable in area where communication coverage overlap. Network quality degradation occurs problem in LTE network We recommend to apply network sharing technology Environment Change Characteristics of Disasters Global warming Large industrial complex Dense living space Unexpected Larger Complicate, Various

Ⅰ. Introduction(2) Same technology, Rapid response for disaster

LTE Push To Talk Mission Critical Group, Private Call Ⅰ. Introduction(3) LTE Push To Talk Mobile data traffic expects to increase 1000 fold from 2010 to 2020 Lte-advanced shall support wider bandwidth like 100MHz, LTE shall support 20MHz, so frequency resource is lack. Also, multiple operator and various services use LTE technologies. For example, volte / data/ enterprise for company / public safety for government/ railway and maritime Multiple lte networks has co-located area and intra-operator interference. LTE networks use same frequency has converge overlap. Intra-operator interference is inevitable in area where communication coverage overlap. Network quality degradation occurs problem in LTE network We recommend to apply network sharing technology Mission Critical Group, Private Call

Ⅰ. Introduction(4) MCPTT Call Type Private Call, Group Call, Emergency Call cased by On/Off network

Ⅱ. MCPTT Priority Model(1) MCPTT Priority Model (3GPP TS 22.179) - Dynamic MCPTT priority control

Ⅱ. MCPTT Priority Model(2) MCPTT Priority Model (3GPP TS 22.179) - Dynamic MCPTT priority control & MC Service user profile MCPTT Policy Information MCPTT Policy& QoS Control LTE Policy Inofratmion EPC Scheduling Control Coordination [MCPTT EPC Resource Control] [MC Service User Profile]

Ⅲ. MCPTT QoS Control MCPTT QoS Control Standardized QCI, QoS parameter thresholds and example service(according to 3GPP) QCI Resource Type Priority Level Packet Delay Budget Packet Error Loss Service 1 GBR 2 100ms 10-2 Conversational Voice 4 150ms 10-3 Conversational Video (Live Streaming) 3 50ms Real Time Gaming 5 300ms 10-6 Non-Conversational Video (Buffered Streaming) 65 0.7 75ms Mission Critical user plane Push To Talk voice 66 Non-Mission-Critical user plane Push To Talk voice Non-GBR IMS Signalling 6 Video (Buffered Streaming) TCP-based 7 Voice,Video (Live Streaming) Interactive Gaming 8 9 69 0.5 60ms Mission Critical delay sensitive signalling 70 5.5 200ms Mission Critical Data

[MCPTT EPC Resource Control] Ⅲ. Mobile traffic Jam LTE mobile traffic jam by Disaster Mobile traffic is quickly higher over than radio resource capacity because of multiple user. Network quality is worse, so we need to protect MCPTT user. Base Station Time Traffic Mobile Traffic Resource Capacity [MCPTT EPC Resource Control]

Ⅳ. Dynamic MCPTT resource control(1) MCPTT user request to change priority MCPTT user request to change priority Command center checks possibility MCPTT user gets priority [MCPTT Priority Change Procedure] UE eNodeB MME HSS MCPTT Server MCPTT Priority Change Request MCPTT Priority Change Answer UE eNB MME SGW PGW SIP Core MCPTT AS HSS PCRF Uu S1-MME S1-U SGi Gx S11 S6 Rx Check Possibility change priority Change User Profile (Resource Priority) [Network Diagram]

Ⅳ. Dynamic MCPTT resource control(2) Command center request to change user priority Command center requests to change user priority MCPTT user get priority UE eNB MME SGW PGW SIP Core MCPTT AS HSS PCRF Uu S1-MME S1-U SGi Gx S11 S6 Rx [MCPTT Priority Change Procedure] UE eNodeB MME HSS MCPTT Server MCPTT Priority Change Answer Command center request to change user priority Change User Profile (Resource Priority) [Network Diagram]

MCPTT resource scheduling algorithms Ⅳ. Dynamic MCPTT resource control(3) Network operator select resource allocation method by MCPTT Priority We purpose MCPTT resource scheduling algorithms. Start Request to change user priority   Command center checks possibility No   Yes   Change user priority & Radio resource allocation End MCPTT resource scheduling algorithms formula

Reference signal power Ⅴ. Field test and performance evaluation System Parameter We use LTE System parameter following table and diagram. We tested in Traffic jam. case 1 . Normal radio resource allocation case 2. MCPTT resource scheduling algorithms User Priority MCPTT Super user High MCPTT user Mid Non- MCPTT user Low Parameter Value Channel Bandwidth 10MHz Carrier Frequency 700 MHz(Band 28) Transmit Power 40W(46 dBm) Reference signal power 21 dBm Antenna gain 15 dBi Antenna Height 500M MIMO 2 ｘ2 MIMO UE count 3 UE eNB MME SGW PGW SIP Core MCPTT AS HSS PCRF Uu S1-MME S1-U SGi Gx S11 S6 Rx MCPTT IMS EPC System Diagram System Parameter

Ⅴ. Field test and performance evaluation UE Download Throughput (Case 1 vs Case 2) user Original method (Mbps) proposed method MCPTT super user 10.82 18.95 MCPTT normal user 10.79 8.95 non MCPTT user 10.69 4.52

Ⅴ. Field test and performance evaluation UE Upload Throughput (Case 1 vs Case 2) user Original method (Mbps) proposed method MCPTT super user 7.51 11.58 MCPTT normal user 7.45 6.34 non MCPTT user 7.07 3.27

dynamic resource scheduling algorithm is to resolve the problem Ⅵ. Conclusion In MCPTT, there is traffic jam that causes excessive traffic due to disaster. the MCPTT user who needs to recover from the disaster can’t communicate dynamic resource scheduling algorithm is to resolve the problem Case 1 : changes the user priority dynamically by directly requesting the user Case 2 : changes the user authority on the command center. . We tested ideal and field environment Network quality is guaranteed. (future work) It needed to determine the disaster situation and automatically grant authority.