CloudAir, Dynamic Spectrum Sharing
- 1. 1 Reshaping Multi-mode & Multi-band Network CloudAIR1.0 CloudAIR2.0 5G Fast Introduction in all bands Fundamental Network in golden low band Smooth RAT Migration of all bands CloudAIR3.0 Spectrum Sharing Spectrum On-Demand Utilization
- 2. 2 [email protected] Lean [email protected] UMTS GSMGSM Guard in-band 7.4MHz UMTS GSMGSM No Guard 6.2MHz Phase-I: GU@5MHz UMTS Capacity vs. 5MHz 60% UMTS GSMGSM 5MHz Dynamical Sharing GU@5MHz, First Step to Spectrum Cloudification Operator with 5MHz in 900MHz can deploy UMTS GU Spectrum Sharing GL Spectrum Sharing UL Spectrum Sharing
- 3. 3 Phase-II: GU@5MHz Enhanced UMTS Capacity vs. 5MHz 60% GU@5MHz Enhanced for Extreme Performance Same Capacity Bandwidth Reduced Same Bandwidth Capacity Density x2 x2 Density Dense Frequency Multiplexing OR UMTS GSMGSM 5MHz UMTS GSMGSM 5MHz UMTS Capacity vs. 5MHz 85% GU spectrum sharing, boosting the capacity GU Spectrum Sharing GL Spectrum Sharing UL Spectrum Sharing
- 4. 4 GL Spectrum Concurrency Introduces More LTE Bandwidth Traditional@10MHz GL@10MHz Phase 1 … GSM 1.2MHz GSM 1.2MHz … GSM 2.4MHz GSM 2.6MHz LTE 5MHz Guard in-band 10MHz 10MHz LTE 10MHz GL@10MHz Phase 2 … GSM 2.2MHz GSM 2.2MHz 10MHz LTE 10MHz GU Spectrum Sharing GL Spectrum Sharing UL Spectrum Sharing
- 5. 5 UMTS and LTE Dynamic Spectrum Sharing U 1 carrier scenario 52% UMTS Sharing to LTE 2.6M dynamic sharing U 2.4~5M L 3~5M 7.4M UMTS 50~60% vs U5MHz + 50~60% vs L 3MHz LTE Enable Limited Spectrum to support U&L LTEUMTS Principles: 1. UMTS and LTE 1:1 co-site, co-coverage. 2. The eNodeB sends in real time (Millisecond level) the downlink spectrum occupation information to NodeB. 3. The NodeB aligns the downlink signal sending time of the UMTS cell to filter out the UMTS signals in the shared spectrum used by the LTE cell. Introduce more LTE Bandwidth Exclusive Algorithm to Ensure the Benefit eNodeB NodeB RB Schedule Dynamic Filtering Time Frequency TTI i+1 TTI i … … … … LTE dedicated PRB LTE occupied sharing PRB LTE idle sharing PRB Downlink Adaptive Band-Pass Filter GU Spectrum Sharing GL Spectrum Sharing UL Spectrum Sharing
- 6. 6 Larger UMTS Capacity & Better LTE Experience UMTS & LTE Spectrum Sharing Based on DC-HSDPA U 3 carrier scenario UMTS UMTS UMTS UMTS +50% vs U5MHz Larger Capacity LTE +80% vs L5MHz Better User experience UMTS U 2 Carriers + L10M @ 15Mhz DL only for DC-HSDPA UMTS LTE U 3 Carriers @ 15Mhz UMTS DC main carrier UMTS DC secondary carrier, only using for DC-HSDPA DC-HSDPA UE Sharing Spectrum Provide UMTS Downlink Channel Exclusive Algorithm to Ensure the Benefit Principles: 1. Downlink Adaptive Band-Pass Filter 2. Mobility Policy Optimization LTE U2100 f1 U2100 f2 U2100 f2 U900 G900 U2100 f1 UE camp on, be handed over to, be redirected to, or reselect to U f1 GU Spectrum Sharing GL Spectrum Sharing UL Spectrum Sharing
Editor's Notes
- #2: CloudAIR1.0主要用于解决现有网络在多频段和多RAT场景下的网络效率问题。 CloudAIR2.0主要用于解决5G演进场景中现有投资保护，网络演进平滑，5G快速部署等问题。 CloudAIR1.0 is mainly used to solve the network efficiency problem on existing networks in the multi-band and multi-RAT scenario. CloudAIR2.0 is mainly used to solve the problems of existing site investment protection, smooth network evolution, and fast deployment of 5G in the 5G evolution scenario.
- #3: 下面我们介绍具体的特性。 GU@5M，依据传统的解决方案，部署GSM S111 + UMTS 1载波，至少需要7.4M的频谱。即使是采用lean GSM的技术，也只能在6.2M的频谱上部署. GU@5M阶段一，在一个标准的UMTS载波，5MHz的基础上，共享出2.4MHz, 部署GSM S111, 实现5MHz频谱上GU同部署。此时UMTS的容量相比标准的5MHz大概是60%。 Let‘s introduce detail CloudAIR features one by one. GU @ 5M, based on a traditional solution, deploying a GSM S111 + UMTS 1 carrier requires at least 7.4M of spectrum. Even with the lean GSM technology, it can only be deployed on the 6.2M spectrum. GU @ 5M phase one, a standard UMTS carrier(5MHz) can share 2.4MHz for the deployment of GSM S111, to achieve the GU deployment in 5MHz spectrum . At this time, the UMTS capacity is about 60% compared to the standard 5MHz.
- #4: 如果采用GSM的频谱紧密复用技术的话，我们可以在1.2MHz的频谱上部署GSM S111. 这就是GU@5M的阶段二。 利用该技术，UMTS只要共享出1.2MHz即可，此时UMTS的容量是标准5MHz的85%； 如果GSM的容量需要还是比较大，可以在2.4MHz上部署GSM S222. We can deploy GSM S111 on the spectrum of 1.2MHz if we adopt the spectrum tight reuse technology of GSM. This is phase 2 of GU @ 5M. With this technology, UMTS can share 1.2MHz to GSM as long as the capacity is 85% of the standard 5MHz. If the capacity of GSM is still relatively large, GSM S222 can be deployed on 2.4MHz.
- #5: GSM和LTE频谱并发特性是指在同一片区域内的频谱上同时部署了GSM和LTE两种制式，两种制式根据业务量按需使用相同的频谱资源，提高了频率利用效率，解决了传统Refarming技术一段频谱只能分配给一种制式的问题。本特性由BSC和eNodeB配合实现GSM和LTE对共享频谱的联合分配和调度，特别的，在GSM未使用共享频谱时，LTE可通过使用共享频谱达到大带宽的需求。本特性可应用于GSM和LTE同时支持的频段，即850MHz/900MHz/1800MHz/1900MHz频段。 GSM和LTE频谱并发特性的价值在于： 解决老制式终端长期不退网问题 老制式频谱利用率偏低，老制式退网将是一个漫长的过程。因为老制式终端设备往往存在“长尾效应”，短时间内不能完全退网，导致频谱效率高的新制式不能尽早开启，而造成的高价值频谱资源浪费的问题。GSM和LTE频谱并发可以在保留GSM老制式的同时，部署LTE新制式。 解决新制式引入的初期覆盖率受限、制约用户发展问题 850/900MHz低频段相对1800/1900MHz和2600MHz频段具有传播损耗小、覆盖广的特点。850/900MHz低频段是移动网络中较为稀缺的“黄金频段”，该频段频谱总体带宽小，介于5MHz和10MHz的运营商占56%。没有GSM和LTE频谱并发特性时，这些运营商在850/900MHz低频段不能开启LTE。LTE只能在1800/1900MHz和2600MHz这样的频谱资源较充足的高频段部署。 通过GSM和LTE频谱并发，可在850/900MHz低频引入LTE ，不需要释放现有GSM频谱，只需要共享配置。LTE可以在低频上做到快速全网覆盖，随用户渗透率变化按需使用。 解决现有Refarming机制中一段频谱只能配置给一种制式使用的问题 实现GSM和LTE频谱并发，按需使用频谱，可以在GSM需要时将频谱给GSM使用，GSM不需要时将频谱给LTE使用，从统计复用上充分利用频谱资源、提升频谱利用率。 LTE可以实现850/900/1800/1900MHz频段部署CA 850/900/1800/1900MHz频段部署LTE后，可以将多个频段的LTE联合起来做CA，把所有频段的剩余资源全部聚合，来提升用户体验。 支持存量终端 综合保障GSM和LTE的最优性能 在保障GSM网KPI稳定的前提下，尽可能的提升LTE的下行容量。 This feature enables GSM and LTE to be deployed on the same spectrum band, and determines the usage of this band based on the service volume. The co-deployment of GSM and LTE on one spectrum band fully improves spectral efficiency and addresses the issue that one spectrum band can be allocated to only one RAT in refarming technologies. The BSC and eNodeB implement joint allocation and scheduling of the shared spectrum band. When GSM does not occupy the shared spectrum band, LTE can use the shared spectrum band to meet its large bandwidth requirements. This feature applies to the frequency bands supported by both GSM and LTE, that is, 850 MHz, 900 MHz, 1800 MHz, and 1900 MHz frequency bands. This feature provides the following benefits: Solves the long-tail challenge of legacy GSM terminals Although GSM spectral efficiency is low, for GSM to exit requires a significant amount of time, and may involve years for completion. This is because legacy GSM terminals generally have a long-tail issue and will not exit the network within a specific short period of time. Spectrum resources occupied by GSM cannot be released and reallocated to newer radio access technologies (RATs) that can provide higher spectral efficiency. This feature enables LTE deployment on the same spectrum band originally allocated to GSM while keeping legacy GSM networks. Solves the early phase issue of insufficient LTE coverage, facilitating user acceptance Low frequency bands 900 MHz and 850 MHz are characterized by low propagation loss and wide coverage, in comparison to high frequency bands 1800 MHz, 1900 MHz, and 2600 MHz. 900 MHz and 850 MHz are considered as gold frequency bands in mobile networks which only have a small bandwidth. Only 56% of operators have a bandwidth of 5–10 MHz on these frequency bands. Without this feature, these operators cannot deploy LTE on 900 MHz and 850 MHz frequency bands. They can only deploy LTE on high frequency bands with relatively abundant frequency resources.
- #6: U 1载波场景两种情况： 低频小带宽，更小带宽支持U&L； 高频U存量1载波，L更大带宽更好体验 There are two scenarios for the U 1 carrier scenario: 1. Low bandwidth and small bandwidth support U&L. 2. High frequency U installed with one carrier, providing higher bandwidth and better user experience
- #7: UL spectrum sharing based on DC-HSDPA的技术基础与UL动态频谱共享一致，但利用了UMTS DC-HSDPA不发上行的特征，规避了UL之间的上行干扰。 The technical basis of UL spectrum sharing based on DC-HSDPA is the same as that of UL dynamic spectrum sharing. However, UMTS DC-HSDPA does not transmit uplink signals, which avoids uplink interference between UL and UL.