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CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios
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CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios

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CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios Document Transcript

  • 1 NETMANIAS TECH-BLOG Please visit www.netmanias.com to view more posts CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios August 19, 2014 | By Dr. Michelle M. Do and Dr. Harrison J. Son (tech@netmanias.com) In the CoMP scenarios defined in 3GPP Release 111 and Release 122 , CoMP is used  within a single eNB (intra-eNB) with ideal backhaul only - in restricted areas in Release 11  among eNBs (inter-eNB) with non-ideal backhaul as well - in more expanded areas in Release 12 Figure 1. CoMP coordination areas defined in 3GPP scenarios (Release 11 and Release 12) Rel. 11: Intra-eNB & Ideal Backhaul ❶❷❸❹ Rel. 12: Inter-eNB & Non-ideal Backhaul ❺❻❼ 3GPP CoMP Scenarios RRH3 Macro eNB1 RRH1 Macro RRH Cell 2 Cell 1 Cell 3 Cell 4 Cell 6 RRH6 RRH4 RRH5 Cell Site 2 BBU1 Cell Site 1 Cell 5 RRH2 Cell 7 Cell 8 RRH9 RRH7 RRH8 Cell Site 3 BBU2 Small cell eNB Macro eNB and small cell eNBs use different channels, and small cell eNBs share a co-channel. Macro RRH Ideal backhaul (fronthaul) Macro eNB2 Small RRH Small cell eNB Small cell eNB Cell 9 ❷ Inter-Site CoMP Intra-Site CoMP ❶ Macro RRH CoMP Cluster = 6 cells CoMP Cluster = 3 cells ❸❹ HetNet CoMP 3: Co-channel, different Cell IDs 4: Co-channel, the same Cell IDs Ideal backhaul (CPRI fronthaul) Non-ideal backhaul (Microwave, DSL, Cable, PON, etc.) Non-Ideal Backhaul Channe 1 Channe 2 ❺ Inter-Macro eNB CoMPInter-Small Cell eNB CoMP ❼ ❻ HetNet CoMP Macro eNB and small cell eNBs share a co-channel.
  • Netmanias Tech-Blog: CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios 2 According to NGMN3 , ideal backhaul refers to one with latency of 2.5 usecs or less and capacity of 10 Gbps or higher, whereas non-ideal backhaul refers to one with latency of 5~30 msecs (or even higher). Release 11 and Release 12 have defined 4 and 3 scenarios, respectively. We will refer to them as scenario 1 through 7, and explain them one by one below. ■ Release 11 CoMP Scenarios: Intra-eNB CoMP in Ideal Backhaul (Coordination among Cells that Belong to the Same eNB with Ideal Backhaul) In Release 11, CoMP can be used only within the coverage area of a single base station (eNB). The coverage area of one base station can be as large as to include only one site (e.g. macro eNB 2/cell site 3 in Figure 1), or can be extended to include many sites (e.g. macro eNB 1/ cell sites 1 and 2). In Release 11, CoMP coordination is possible only among neighbor cells belonging to the same base station (i.e. intra-site cells or inter-site cells). Cells do not coordinate with their neighbor cells if they belong to different eNBs. That is, CoMP coordination is performed within one eNB only (intra-eNB CoMP). Release 11 defined the scenarios for intra-eNB CoMP in ideal backhaul as follows: Scenario ❶: CoMP used among macro cells belonging to one site in one macro eNB (e.g. Cells 2 and 3 in Cell Site 1) - intra-site Scenario ❷: CoMP used among macro cells belonging to different sites in one macro eNB (e.g. Cell 2 in Cell Site 1 and Cell 4 in Cell Site 2) - inter-site Scenario ❸: CoMP used between a macro cell and one of its small cells (small RRHs) that has a different cell ID than the macro cell Scenario ❹: CoMP used between a macro cell and one of its small cells (small RRHs) that has the same cell ID as the macro cell Release 11 allows for intra-eNB CoMP only. Due to this restriction, CoMP standardization in Release 11 is defined only for physical layer operations, and not for interfaces between eNBs. Each eNB uses a vendor- specific CoMP algorithm, and vendor proprietary interfaces are used between base stations. So, CoMP coordination between eNBs with different vendors is not possible. ■ Release 12 CoMP Scenarios: Inter-eNB CoMP in Non-Ideal Backhaul (Coordination between eNBs with Non-Ideal Backhaul) To be able to apply Release 11 CoMP scenarios in more base stations, ideal backhaul that connects all base stations and all sites with optic fibers, and hence causes no latency is required. Practically, however, few operators can provide such ideal backhaul. To address this issue, in Release 12, CoMP scenarios and technologies have evolved to coordinate with neighbor base stations in non-ideal backhaul networks - more practical network environments - like Microwave, DSL, Cable, PON, etc. Release 12 defined the scenarios for inter-eNB CoMP in non-ideal backhaul as follows: Scenario ❺: CoMP used among macro cells belonging to different macro eNBs (e.g. Cell 3 in eNB 1 and Cell 7 in eNB 2) Scenario ❻: CoMP used between a macro cell and one of its small cells (small cell eNBs) Scenario ❼: CoMP used among small cells (small cell eNBs) in a macro cell (macro cell and small cells use different channel, but small cells share the same channel)
  • Netmanias Tech-Blog: CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios 3 ■ Reducing Interference Areas by Expanding Coordination Areas (Only CoMP between macro cells is presented below) eNB1 Cell 2 Cell 1 Cell 3 Cell 4 Cell 6 Cell Site 2 Cell Site 1 Cell 5 Cell 7 Cell 8 Cell 9 ❶ Intra-Site CoMP Cell Site 3 BBU [Rel. 11] Scenario ❶: CoMP Used among Macro Cells belonging to One Site in One Macro eNB (Intra-Site) RRH eNB2 BBU eNB3 BBU ❶ Intra-Site CoMP ❶ Intra-Site CoMP ❶ Intra-Site CoMP Interference Area  Intra-eNB & Intra-Site CoMP  CoMP Cluster = 3 cells  No CoMP among cells in different eNBs, so no inter-eNB backhaul connection required Macro eNB Macro RRH BBU CoMP Cluster = 3 cells eNB Cell 2 Cell 1 Cell 3 Cell 4 Cell 6 Cell Site 2 Cell Site 1 Cell 5 Cell 7 Cell 8 Ideal backhaul (fronthaul) Cell 9 ❷ Inter-Site CoMP ❶ Intra-Site CoMP ❷ Inter-Site CoMP Cell Site 3 BBU RRH [Rel. 11] Scenario ❷: CoMP Used among Macro Cells belonging to Different Sites in One Macro eNB (Inter-Site) Idealbackhaul(fronthaul) ❷ Inter-Site CoMP ❶ Intra-Site CoMP ❶ Intra-Site CoMP Macro eNB  Intra-eNB & Inter-Site CoMP  CoMP Cluster = 9 cells  CoMP also used among cells at borders between sites (e.g. Cell 2 in Cell Site 1 and Cell 4 in Cell Site 2), reducing interfered areas.  Connecting BBU at eNB and RRHs at other sites using optical cables (optical fronthaul). Also known as ideal backhaul. Macro RRH Interfernece Area CoMP Cluster = 9 cells ❶ Intra-Site CoMP
  • Netmanias Tech-Blog: CoMP (2): CoMP Coordination Areas Defined in 7 Different 3GPP Scenarios 4 ■ Comparison of Scenarios Footnotes 1. 3GPP TR 36.819, CoMP operation for LTE physical layer aspects (Release 11) 2. 3GPP TR 36.874, CoMP operation for LTE with non-ideal backhaul (Release 12) 3. NGMN, RAN Evolution Project, "Backhaul and Fronthaul Evolution" ❶ Intra-Site CoMP ❷ Inter-Site CoMP Inter-eNB CoMP [Rel. 12] CoMP Used among Macro Cells at Different Macro eNBs (Cells at CoMP Cluster Border) eNB Cell 2 Cell 1 Cell 3 Cell 4 Cell 6 Cell Site 2 Cell 5 Cell 7 Cell 8 Cell 9 Cell Site 3 Cell 10 Cell 12 Cell 13 Cell 15 Cell Site 5 Cell 14 Cell 16 Cell 17 Cell 18 Cell Site 6 Non-Ideal Backhaul eNB Backhaul X2 Macro eNB  Inter-eNB & Inter-Site CoMP  CoMP also used among cells at CoMP cluster borders (e.g. Cell 9 in Cell Site 3 and Cell 11 in Cell Site 4) through non-ideal backhaul, reducing interfered areas even more. Macro RRH Interference Area Cell 11 [Rel.12] Inter-eNB CoMP Cell Site 4 Cell Site 1 CoMP Cluster 2 (cell 10 – cell18) CoMP Cluster 1 (cell 1 - cell 9) Intra-eNB vs. Inter-eNB Scenario 1 Scenario 2 Scenario 3 Scenario 4 Intra-eNB Intra-eNB Intra-eNB Intra-eNB Homogeneous vs. Heterogeneous Homogene- ous Homogene- ous Heterogene- ous Heterogene- ous Scenario 5 Inter-eNB Homogene- ous Scenario 6 Inter-eNB Heterogene- ous Scenario 7 Inter-eNB Heterogene- ous HetNet - - Co-channel Co-chnnel - Co-chennel Different channel Ideal back/front-haul vs. Non-ideal back/front-haul - Ideal Ideal Ideal Non-ideal Non-ideal Non-ideal Co-channel vs. Different channel Different cell ID vs. Same cell ID - - Different cell ID Same cell ID - Different cell ID Different cell ID
  • About NMC Consulting Group (www.netmanias.com) NMC Consulting Group is an advanced and professional network consulting company, specializing in IP network areas (e.g., FTTH, Metro Ethernet and IP/MPLS), service areas (e.g., IPTV, IMS and CDN), and wireless network areas (e.g., Mobile WiMAX, LTE and Wi-Fi) since 2002. Copyright © 2002-2014 NMC Consulting Group. All rights reserved. 5 Carrier WiFi Data Center Migration Wireline Network LTE Mobile Network Mobile WiMAX Carrier Ethernet FTTH Data Center Policy Control/PCRF IPTV/TPS Metro Ethernet MPLS IP Routing 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 eMBMS/Mobile IPTV Services CDN/Mobile CDN Transparent Caching BSS/OSS Cable TPS Voice/Video Quality IMS LTE Backaul Netmanias Research and Consulting Scope Visit http://www.netmanias.com to view and download more technical documents. Future LTE IP/MPLS CarrierEthernet Networks Consulting POC Training Wi-Fi Infrastructure Services CDN Transparent Caching IMS Concept Design DRM eMBMS protocols Analyze trends, technologies and market Analysis Report Technical documents Blog One-Shot gallery We design the future We design the future We design the future