面向LTE基站回传的PTN核心层L3网络组网思路探讨

doi:10.3969／j.issn.1000-0801.2013.09.033

Abstract

Abstract:

The TD-LTE network scenario PTN core layer L3 networking architectures and networking ideas were described. Firstly, the TD-LTE radio network requirements were introduced and the existing metro transport network appropriate framework was described. Secondly, the current PTN L3 functions, PTN+CE bearer network architecture, PTN L3 network detailed deployment and designing were analyzed. Finally, PTN metro L3 network evolution was analyzed, a reference to the future development of the network was provided.

Key words: metro transport network, PTN, core network design, TD-LTE

Jian Wang,Can Liang. Discussion of LTE Backhaul Service-Oriented PTN L3 Core Network Design[J]. Telecommunications Science, 2013, 29(9): 165-170.

技术特征	方式1:PTN L3	方式2:PTN+CE路由器
OAM及保护	OAM体系完善，符合端到端的管理运维习惯	目前PTN与CE的网络级OAM不一致，无法实现端到端管理；保护方式复杂，难以实现50 ms的倒换
路由／配置	静态路由为主，后续可采用动态路由，通过网管图形化界面配置，自动计算路由及批量调整	采用动态路由，各种网络调整引起的路由变化可自动通告全网
带宽规划	PTN通过端到端带宽规划提升网络资源利用率，对于CIR （保证带宽）配置刚性带宽，PIR（峰值带宽）配置弹性带宽	CE一般通过网络轻载保证业务可靠性，带宽需求应在链路峰值带宽的基础上考虑30%～50%的冗余，带宽利用率低
网络维护管理	网管能力强大，网络可管可控性强，利于网络维护和端到端故障定位	CE 网管能力较弱，维护管理界面复杂，需增加相关维护人员

方案	组网可扩展性、灵活性	网络容量	网络清晰度、可维护性	局间OTN资源消耗
方案1	能适应EPC 网元布局的调整；L3设备的增加可满足大量L3业务落地；X2、S1-Flex 电路可灵活调度，大部分X2数据可就近转发	解决保护组、OAM能力等资源瓶颈，网络容量大	由于采用 L2分区域终结、L3两层结构组网的方式，网络L2／L3层的设计和维护更为清晰合理	节省局间OTN／WDM资源
方案2	由于L2网络需部署至EPC网元，一旦核心网节点变动或基站划区调整，网络需进行相应的改建，网络组织不够灵活	网络容量有限	组网相对复杂，适合于LTE 规模不大的网络	需要增加大量局间OTN／WDM资源

方式带宽规划	网络清晰性、可扩展性	网络安全性
方式1所有桥接点地位均等，带宽分布均匀	EPC 侧落地PTN 设备仅负责处理L3数据，功能独立，便于扩展；同时路由部署更为简单	EPC对接节点为两套PTN与EPC作IP FRR或VRRP保护，安全性高
方式2带宽规划不均衡，与EPC相连的桥接点带宽需求比其他桥接点大	对EPC节点所在PTN设备要求更高，可扩展性较弱	EPC侧单套设备存在一定安全隐患

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[2]	Bao FENG,Tao MA,Shilong CAI,Yang LI. Power allocation of MIMO system with RF mismatch in TD-LTE power wireless private network [J]. Telecommunications Science, 2018, 34(3): 177-182.
[3]	Pengfei WANG,Jian ZHENG. Interference analysis of TD-LTE downlink signal on S-band pulse radar fuse Abstract:Concerning that the TD-LTE downlink signal and pulse radar fuze signal may be interfered within 2 300 to 2 400 MHz band of S-band,the method of calculating the signal-to-interference ratio at the pulse radar fuse receiver was used.And the isolation distance that the TD-LTE downlink signal did not interfere the pulse radar fuze signal under the condition of other factors determined was obtained.The validity of the conclusion through the link level simulation was verified.At the same time,it was also obtained when the horizontal distance between the two was isolated distance,the transmission power of the base station was increased (or the fuze transmission power was reduced),the ground effective reflection area was reduced,the fuse will also be interfered by TD-LTE downlink signal. [J]. Telecommunications Science, 2018, 34(2): 23-31.
[4]	Xu DENG. L2/L3 equipment deployment scheme in PTN network architecture [J]. Telecommunications Science, 2017, 33(6): 164-170.
[5]	Tao DU,Xiaohui DENG,Gang LI. Analysis of operation environment influence of 1.8 GHz TDD-LTE industry private network [J]. Telecommunications Science, 2017, 33(10): 148-154.
[6]	Xiaoxia QIN,Chen WANG,Di QIAO. Backhaul carrying scheme of TD-LTE microcell base station [J]. Telecommunications Science, 2016, 32(4): 133-140.
[7]	Lunsuo WANG. TD-LTE and LTE FDD fusion networking strategy [J]. Telecommunications Science, 2016, 32(1): 188-192.
[8]	Anda DEN,Deping XU,Linjie SUN,GLujing GEN,Xinning SHI,Xiang WAVG. Research and suggestion on the choice of the acceptance indexes of the TD-LTE VoLTE wireless network engineering [J]. Telecommunications Science, 2015, 31(Z1): 27-32.
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[10]	Congsheng QI,Guibin TIAN. TD-LTE refinement planning and marketing based on user behavior [J]. Telecommunications Science, 2015, 31(Z1): 58-62.
[11]	Lidan GAO,Fengjie SUN,Guojun LIU,Jianqi LI. Power PTN security comprehensive evaluation based on power application [J]. Telecommunications Science, 2015, 31(Z1): 90-94.
[12]	Chang Li,Jianbin Zhang,Jing An. TD-LTE and TD-SCDMA Collaborative Network Optimizing Strategy [J]. Telecommunications Science, 2015, 31(8): 139-146.
[13]	Li Gui,Luohui Xia. Study and Application on RF Conformance Testing of TD-LTE Base Station [J]. Telecommunications Science, 2015, 31(5): 107-113.
[14]	Bai Wenle,Wang Xu,Zhang Yongmei and Peng Mugen. An Improved Algorithm for TD-LTE Downlink Time Synchronization [J]. Telecommunications Science, 2015, 31(1): 2015030-0.
[15]	Wenle Bai,Xu Wang,Yongmei Zhang,Mugen Peng. An Improved Algorithm for TD-LTE Downlink Time Synchronization [J]. Telecommunications Science, 2015, 31(1): 72-76.

Discussion of LTE Backhaul Service-Oriented PTN L3 Core Network Design

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