1 / 9

Synchronization Requirements for RAN & Backhaul Update

Synchronization Requirements for RAN & Backhaul Update. draft-zhou-tictoc-ran-sync-req-01.txt Xiaodong Duan, Lan Wang China Mobile. Version Update. New version submits draft-zhou-tictoc-ran-sync-req-01.txt Update Phase sync accuracy of RAN system in TD-SCDMA reaches agreement

dante
Télécharger la présentation

Synchronization Requirements for RAN & Backhaul Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Synchronization Requirements for RAN & Backhaul Update draft-zhou-tictoc-ran-sync-req-01.txt Xiaodong Duan, Lan Wang China Mobile

  2. Version Update • New version submits • draft-zhou-tictoc-ran-sync-req-01.txt • Update • Phase sync accuracy of RAN system in TD-SCDMA reaches agreement • Accuracy among NodeBs: 3us • Accuracy between NodeB and reference clock: 1.5us • Phase sync accuracy of RAN system in TD-LTE is under discussion • Accuracy among NodeBs: 1~3us • Requirements for 1588v2 backhaul

  3. Base station Base station controller Ref. Clock UE UE RadioInterfaceSYNC Node SYNC Network SYNC Base station Requirements Update

  4. Urgent requirements for RAN Sync • Most operators have choice LTE as their evolution of 2/3G network • TDD based LTE has just been introduced • TDD LTE has higher sync requirement than FDD • The requirements for RAN is clear and urgent • Radio Access Network is on the early stage of moving to IP transport • GPS is the only solution so far • The total technologies/solutions should be deployed within one year----Urgent!! • TICTOC should accelerate its work

  5. ATM NodeB SDH RNC ATM NodeB Example:Current 3G/TD-SCDMA Networks • Currently, each nodeB has a GPS antenna--Not so good! • COST: you can imagine 10000 BSs in one city • Uneasy deployment: affect the flexible deployment of BS • Other • Security/Reliability

  6. Access Aggr Core RNC RNC 802.1ad IP/MPLScore PBT NodeB NodeB NodeB NodeB NodeB NodeB NodeB PON DLS RNC RNC TMPLS IP/MPLScore TMPLS TMPLS RNC RNC MPLS Access IP/MPLScore MPLS AGG VLL/VPLS 802.1ad Mobile backhaul 802.1ad/ PON / MPLS PBT/ TMPLS/ MPLS/ VPLS/ IP IP/MPLS Core

  7. Backhual sync transmission • Two sync transmission mode should be considered • Core network sync distribute—sync are distributed to local clock • 1588v2 over IP/MPLS core • Core to edge- local clock are distributed to Edge Node (such as BS) • IEEE1588 or other must be extend to used within different backhaul technology, such as • MPLS/IP • PON • 802.1 • PBT • TMPLS • The protocols designed by TICTOC should considered • Reliable transmission • Security • Retransmission/Verification • Suit for different kinds of backhaul • How to Work with Multicast Technologies to reduce overhead

  8. Summary • RAN requirements for sync are more clearly now and TD based LTE has high sync requirements • It better for us to provide solutions with 1years, so that the industry can used it ASAP • Most operators are replanning their Mobile Backhaul to meet the high bandwidth, the sync protocol should be considered • Telecom profiles of sync protocol • network scale/ network load/ local clock accuracy • Reliable transport/ security/ efficiency/ Retransmission/Verification • Multicast

  9. Thank you&Any questions?

More Related