슬라이드 1

Size: px

Start display at page:

Download "슬라이드 1"

현지 준
6 years ago
Views:

1 HSN2006 다양한액세스망간의연동기술 장영민국민대학교전자정보통신공학부

2 Contents 연동표준화및망구조 IMS 기반연동관련기술 결론및추후연구 -2-

3 연동표준화및망구조

4 The Vision on IMT IMT IMT-2000 IMT-Advanced IMT-2000 Enhancement of IMT-2000 Future development of IMT-2000 Systems beyond IMT

5 The Vision on IMT (Cont.) Future developments of IMT-2000 The terrestrial radio interfaces: up to 10Mbps and further up to approximately 30Mbps (2005) New capabilities of systems beyond IMT-2000 (2010) Up to approximately 100Mbps for mobile access Up to 1Gbps for nomadic/local wireless access -5-

6 IMT-Advanced Network -6-

7 Technology Trends Relay, multi-hop mesh network Mobile router MIMO-OFDM, AMC, channel estimation, cooperative MIMO Interworking with other networks Cognitive radio Cross-layer and cross-network optimization IMS: Communication and Broadcasting Convergence E2E QoS guaranteed IPv6 seamless vertical handover with multi-hop relay -7-

8 3GPP 표준화동향 3GPP TS V GPP system to Wireless Local Area Network (WLAN) interworking; System description TS V6.3.0 Wireless Local Area Network (WLAN) interworking security TS V GPP system to Wireless Local Area Network (WLAN) interworking; User Equipment (UE) to network protocols; Stage 3 TS V7.0.0 Requirements on 3GPP system to Wireless Local Area Network (WLAN) interworking 3단계연동관련표준화완료 4단계시나리오의표준화는 Rel. 7에서진행중 3GPP LTE Max. 20MHz(DL), 50Mbps@20MHz(UL) -8-

9 3GPP 단계별시나리오 1. Common Billing and customer care between WLAN and 3GPP - Simplest form of integration, which provides only a common billing and customer care to the subscriber 2. 3GPP based access control and based charging - A SIM card based authentication. 3. Access to Packet Domain based services from WLAN - e.g. IP based multimedia services such as VoIP, Video Telephony 4. Session continuity between WLAN and 3GPP systems - Services are continued without the need for user interaction. 5. Seamless services - Follows Inter radio access network handoff requirements. 6. Access to 3G Circuit Switched services -9-

10 LTE Target Specification Spectrum 3G spectrum (2GHz band and the additional bands) Radio aspect WCDMA HSDPA, HSUPA Evolved UTRAN Radio Access UTRAN RTT Carrier Bandwidth Several 100ms DS-CDMA 5MHz Several 10s to 100ms Data Rate 384Kbps ~ 2Mbps 14.4Mbps Mobility ~ 120 km/h (at least 384Kbps) New elements (OFDM, MIMO, etc) < 10ms 1.25, 2.5, 5, 10, 20MHz 50Mbps(uplink) 100Mbps(downlink) ~ 120km/h ~ 350km/h NW aspect Circuit Switch and Packet Switch Packet Switch only -10-

11 3GPP-Technical Trend Rel-99 Functional Freeze Stability Notice R6 Rel-4 Functional Freeze R99 Rel-5 Basic Functionality for WCDMA Global Roaming High Speed Data(2M) High Quality (AMR-CODEC) Deep Freeze Functional Freeze R4 Deep Freeze IP Transport of CN Protocol Flexible MSC C/U Separation R5 E-DCH 서비스 ( 상향고속패킷서비스 ) MBMS* Rel-6 All IP Interworking(IMS E2E 도입, 연동시나리오 3까지 ) IMS(IP Multimedia Subsystem) HSDPA( 하향고속패킷서비스 ) Wideband AMR IMS 도입 Functional Freeze 2007년 6월 MBMS : Multimedia Broadcast/Multicast Service R7 Flexible Bandwidth(1.25 ~ 20MHz) Rel-7 (Long Term Evolution) RNC C/U Separation OFDM Target Data Rate : 100Mbps Interworking(E2E QoS, 연동시나리오 4~6) -11-

12 3GPP Architecture -12-

13 3GPP LTE Architecture BS : Base Station SN-C : Serving Node Control (plane) SN-U : Serving Node User (plane) SGW : Service Gateway SN-C AAA Registers BS Inter - connection HA BS Include RNC SN-U SGW -13-

14 3GPP Rel. 7 AIPN (All IP Network) -14-

15 Key Aspects of an AIPN Seamless mobility across terminals and access systems Common IP-based network IP-based network control Interworking with IP & legacy networks Support of a variety of different access system Advanced mobility management Mobility across access systems Support fast/lossless/seamless handover Multiple dimensions of mobility end-user mobility, terminal mobility, session mobility Access system selection Evolve towards access system independence Consideration Service requirements of an application Load balance of the network Charging & billing Enhanced Services Ubiquitous services (RF tags,..) Group communication Services QoS E2E QoS for an unicast and multicast traffic Static business agreement need to be reconsidered -15-

16 3GPP2 Architecture 3GPP2 3GPP 보다약간늦게표준화작업시작 S.R Version 1.0, 3GPP2 WLAN Interworking: Stage 1 Requirements Radio Acces Network Core Network IS-95A/B BTS HLR IS-95C BTS BSC MSC IWF PSTN IS-95C BTS BSC PDSN HA Internet IS-95C AAA Server -16-

17 WiBro Architecture -17-

18 Interworking Architecture Loose coupling + Tight coupling -18-

19 표준화동향 IEEE (Media Independent Handoff) IEEE WNG SC 에서연동에대한논의가시작됨 04 년 1 월회의에서 IEEE WG 결성 04 년 5 월 California 회의에서논의된사항 Media Independent Triggers, Global Network Neighborhood 04 년 11 월 : 13 개의 Proposal 발표 05 년 7 월 : Media Independent Handover Reference Models 제시 Standards Compatibility 분석 MIH Convergence Function Specification 정의 Event Service Primitives 정의 Handover scenario 정의 ( 수정보완 ) 05 년 11 월 : IEEE g 규격에맞춰제안 06 년 1 월 : MIHF 간의통신에서의프레임헤더논의 3GPP, 3GPP2, IEEE , IEEE 상호연동정의 -19-

20 표준화 논리적망구조 allows handovers across Heterogeneous technologies Multi-Stack MS Tunnel Media Access Tunnel Local AAA Intranet Intranet Access Router Access Gateway Diameter/IPsec IPV4 PLMN PLMNTunnel Internet Internet Diamter/IPsec AAA Server HA Home Home Network Network Home AAA CoN 802 AN (1) 802 AN (X) WAG Tunnel PDG (GGSN) (FA) BTS/ Node B BSC/ RNC 3GPP RAN (1) 3GPP RAN (X) SGSN 3GPP CN (1) 3GPP CN (X) -20-

21 MIHF-MIHF Interfaces in Heterogeneous Networks Terminal Upper Layers MIHF MAC/PHY AP MAC/PHY AP MIHF MAC/PHY Base Station Upper Layers MAC/PHY Access Controller / MIHF Server MIHF MIHF Access Controller/ MIHF Server Access Router Upper Layers MIHF MAC/PHY Base Station Upper Layers MIHF MAC/PHY -21-

22 Functional Elements of the MIH Information Service Architecture -22-

23 표준화동향 IEEE u Interworking between WLAN and external networks Call for proposal: 2006년 3월까지받음 IETF mipv4: Mobility for IPv4 WG mipv6: Mobility for IPv6 WG mobopts: IP mobility optimization RG mipshop: MIPv6 Signaling and Handoff Optimization WG monami6: Mobile Nodes and Multiple Interfaces in IPv6 WG dna: Detecting Network Attachment WG nemo: Network Mobility WG mobike: IKEv2 Mobility and Multihoming WG capwap: Control and Provisioning of of Wireless Access Points WG -23-

24 IMS 기반연동관련기술

25 Why IMS? -25-

26 IMS 분석 IMS 특징 IP 망에서 SIP 기반구조를이용하여멀티미디어서비스제공 Rel. 5 에서도입 Rel. 6 에서 IETF SIP, IPv4 와연동포함하여기능확장 IMS 장점 액세스가독립적 다른네트워크망구조를사용하는오퍼레이터와서비스제공자허락 SIP에의해사용자가이동성을제공받는동안에이동망은 terminal 이동성을제공 IP에근거한어떠한서비스라도쉽게제공 여러단체에서규격을동일시하여발전 -26-

27 IMS 분석 (Cont.) IMS 와 CS 간의연동동향 초기망에서 QoS보장이안되어 VoIP 제공이안되는경우, 음성전화와같은실시간서비스를위해회선교환망 (CS) 사용을검토 TR (R6 V , Combining Circuit Switched (CS) bearers with IP Multimedia Subsystem (IMS) 에서가능한방법들을검토및제시. TR에서두단계의접근방법으로분류하여규격화진행 1단계 : CS 호중에 IMS 세션을열거나 IMS 세션중에 CS 호를여는절차를추가. CN에제한적인수정필요. 2단계 : IMS에서완전하게 CS 호를제어. 규격에변동없음. CS 콜은실시간 bearer를제공하기위한 IMS 세션과연관됨 IMS 세션 setup의부분인네트워크기반의 CBCF(Circuit Bearer Control Function) 의제어로이루어짐 -27-

28 IMS Rel. 6 Work Items IMS Rel. 6 주요 Work Items: IMS Conferencing 과 Messaging, 그룹관리 SIP 부가기능 IMS SIP 이아닌망 (IETF SIP, IPv4) 과의연동 IMS 와회선교환망과의연동 그밖의 Work Items: IPv4 기반의 IMS 와의연동과통합시나리오 ( 주소변환, ALG 등 ) QoS improvements (Gq) 3GPP 의 PoC 와같은서비스제공방안 IMS 간의공통성과호환성 Flow 기반의과금방안 Presence(TSG SA WG2) 3GPP TS V6.6.0 Stage 2 3GPP TS V6.2.0 Stage 3-28-

29 IMS Rel. 7-Work Items 패킷교환망과 IMS 기반의 Emergency calls TR Rel.6 에서시작되었으나 Rel.7 로넘겨짐 IMS 관점과 PS 관점으로나누어진행 IMS 관점에서는 TISPAN Rel.1 일정을맞추기위해우선적진행 End-to-end QoS IMS 기반에서종단 QoS 의관리와보장을위한다양한시나리오와동작 (TR ) TR 에서비스선택사항기술 -29-

30 IMS Features -30-

31 IMS 기반연동망에서 QoS QoS management functions for UMTS bearer service in the control plane TE Local Serv ice Control Transl. MT UMTS BS Adm./Cap. Control RAN Adm./Cap. Control RAB Adm./Cap. Control CN EDGE UMTS BS Subscr. Control Gateway Adm./Cap. Control UMTS BS Transl. Ext. Netw. Ext. Serv ice Control Local BS Radio BS Radio BS RA BS RA BS CN BS CN BS Ext. BS RAN ph. BS M RAN ph. BS M RA NS RA NS BB NS BB NS protocol interf ace serv ice primitiv e interf ace -31-

32 IMS 기반연동망에서 QoS QoS management function for UMTS bearer service in the control plane and QoS management functions for end to end IP QoS Gq Application Function Policy Decision Function Go UE IP BS Transl. Adm./Cap. Control UTRAN Adm./Cap. Control CN EDGE Adm./Cap. Control Subsc. rcontrol Gateway Adm./Cap. Control IP BS Transl. Ext Netw. Ext Service Control UMTS BS RAB UMTS BS UMTS BS Radio BS Radio Iu BS BS Iu BS CN BS CN BS UTRA ph. BS M UTRA ph. BS M Iu NS Iu NS BB NS BB NS protocol interface service primitive interface -32-

33 IMS 기반연동망에서 QoS SBLP(Service-Based Local Policy) entities UE AF Client AF Session Signalling GGSN PEP (Policy Enforcement Point) Go AF (Application Function) Gq PDF (Policy Decision Function) IP BS IP BS Translation/mapping function Translation/mapping function UMTS BS UMTS BS Signalling path -33-

34 QoS Architecture Overview End-to-end QoS service Basic GPRS IP connectivity service - IP bearer resource based local policy decisions may be applied to the bearer Enhanced GPRS based service - SBLP (Service Based Local Policy) decisions are also applied to the bearer. Enhanced GPRS based service (SBLP) Basic GPRS IP connectivity service UE PDF (PDP) GGSN (PEP) AF Backbone IP Network UE Node-B/RNC SGSN GGSN PDP: Policy Decision Point PEP: Policy Enforcement Point -34-

35 IMS 기반연동망에서 QoS ACR Edge Router PSDN GGSN -35-

36 향상된 QoS 보장방안 -36-

37 향상된 QoS 보장방안 -3GPP -37-

38 향상된 QoS 보장방안 -3GPP Authorize QoS Resource, AF session establishment (1~4) AF 세션을성립하기위한 QoS 자원을인증 2번에서서비스종류에따라 bandwidth 할당 Bandwidth가부족할경우에 AF에게재요청후 PDF에서 Soft QoS 적용 QoS 등급별서비스제공방안 Users subscription information ξ Gold 1 Silver 0.8 Bronze

39 QoS Class Mapping e Media- Type (AF) QoS Class Application Data Delivery Service QoS Scheduling Services Packet Scheduling Discipline/Algor ithm QoS Class (PDF) UMTS QoS Class (GGSN) DiffSe rv Class Video (Voice) Phone VoD, AoD Hard QoS -T1/E1 -VoIP without silence suppression -VoIP with silence suppression -Streaming Video -Video Phone UGS ERT-VR RT-VR -Tolerated jitter -SDU size -Min. reserved traffic rate -Max. latency -Request/Transmission policy -Unsolicited grant interval -Maximum latency -Min. reserved traffic rate -Max. sustained traffic rate -Traffic priority -Request/Transmission policy -Unsolicited poling Interval UGS ertps rtps Round-robin (Periodic/fixed assignment) Round-robin (Periodic/dynami c assignment) Round-robin (Dynamic assignment with delay constraint) Class A Class B Conversation Class Streaming Class EF Control Data (HTTP FTP ) Soft QoS -FTP (Download) -HTTP -Instant Message NRT-VR BE -Min. reserved traffic rate -Max. sustained traffic rate -Traffic priority -Request/Transmission policy -Max. sustained traffic rate -Traffic priority -Request/Transmission policy nrtps BE Max C/I PF Scheduling Class C Class D Class E Class F Interactive Priority 1 Interactive Priority 2 Interactive - Priority Background Class AF Best Effort UGS : Unsolicited Grant Service (E)RT-VR : (Extended) Real Time-Variable Rate NRT-VR : Non Real Time-Variable Rate rtps : Real-time Polling Service nrtps : Non- rtps ertps : Extended - rtpa EF : Expedited Forwarding AF : Assured Forwarding BE : Best Effort -39-

40 Network Selection CASE #1: CDMA 만이용가능한네트워크로선택의여지없이 CDMA 를이용 Access router Internet Access router CDMA Access router RAS CASE #2_1: WLAN_O 영역에있으며, 사무실에서비디오나오디오같은실시간트래픽을사용 CASE #2_2: CASE 2_1 와같은지점에서 data 를다운받는등의 background 트래픽으로전환했을때, 이에적합한네트워크를다시선택 CASE #3: 단말이이동함에따라 WLAN_O 의신호가점차약해지며, 결국 CDMA 망으로핸드오버 AP WLAN_0 BS AP WiBro CASE #4_1: UMTS, WLAN_1, WiBro 의네트워크가존재하고 background 서비스를이용할때, 선택알고리즘을통하여네트워크를선택 WLAN_1 CASE #4_2: CASE 4_1 와같은지점에서 browsing 과같은서비스를이용하고자할때, 서비스클래스변화에따라적절한네트워크를선택 -40-

41 Network Selection(Cont.) 기존의네트워크선택은수신파워만을고려함 사용자의요구를반영한다양한QoSfactors (RSS, throughput, timeless, reliability, security, cost) 와서비스클래스에따른 weighting을줌 사용자요구를반영한향상된품질의서비스를제공하는최적의네트워크를선택 -41-

42 이종망간의정책기반무선자원관리기술연구 정책기반기술 비즈니스및서비스차원의관리정책을정의하고, 이를기반으로네트워크및서비스를일관된정책에따라자동으로관리하는기술 정책기반관리기술컴포넌트 PDP(Policy Decision Point) PEP(Policy Enforcement Point) LPDP(Local PDP) -42-

43 Cross-Layer Protocol Interactions -43-

44 결론및추후연구

45 결론및추후연구 Convergence Service + Network + Terminal 통신방송융합서비스 이종망간의연동 WiBro + WLAN + CDMA + DMB Satellite + Terrestrial Network (WLAN, CDMA) 이종망간연동전략및추세 유선 Internet QoS + 무선자원관리의통합제어 Loose coupling -> Hybrid coupling -> Tight coupling MIPv6 기반의 Fast and Seamless 핸드오버방안연구 이종망 RRM 으로의접근 QoS 보장형연동구조 Mobile IP 기반의 seamless mobility Multi-hop relay 및 mesh network access tech. 간의공통자원관리기술 Context-aware vertical handover BcN 기반의 seamless 하고 fast 한이동성기술연구 BcN 환경에서의통합인증기술개발 WiBro 와이종망간의연동상황아래에서 VoIP traffic 의 QoS 지원방안 이종망간의연동시에 backbone 망의 QoS 제공방안 정책기반 end-to-end QoS 제공방안 -45-

04-3G 이동통신망의 multimedia(임병근).ppt

04-3G 이동통신망의 multimedia(임병근).ppt 3G Multimedia QoS Architecture 3 All IP Network and Multimedia Services All IP Network and Multimedia Services Cdma2000 Network Configuration BTS BSC/ PCF BSC3/ PCF BTS Abis A3/A7 Abis BTS MM AAA AGW/