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requirements and viewpoints for backhaul synchronization

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requirements and viewpoints for backhaul synchronization

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    1. Requirements and viewpoints for backhaul synchronization draft-zhou-tictoc-ran-sync-req-00.txt Angela Zhou, Xiaodong Duan China Mobile

    3. Synchronization in 2G/GSM 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another. 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another.

    4. Synchronization in 3G/TD-SCDMA 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another. 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another.

    5. Synchronization in 4G/TDD-LTE/FDD-LTE 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another. 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another.

    6. Synchronization in different parts Requirements schematic diagram

    7. Outline Synchronization Requirements Mobile backhaul network Concerns on synchronization

    8. Mobile backhaul 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another. 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another.

    9. Mobile backhaul 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another. 2. Applications Description 2.1. Time Service Applications There are many applications in telecommunications that need to know the time with great precision. If there would be some services that require great precision such as position services, then RAN system has to provide precise time synchronization. In TDD mode of 2G/3G system, radio interface time synchronization is also needed for smooth handover. 2.2. Frequency Service Applications Cellular base-stations require a highly accurate frequency reference from which they derive transmission frequencies and operational timing however their transport is over E1/T1 or PSN, such as Ethernet IP and MPLS. The radio frequencies should be accurate. To use radio spectrum efficiently transmission frequencies which are allocated to a given base station and its neighbors had better not interfere with each other. There is an additional requirement derived from the need for smooth handover when a mobile station crosses from one cell to another.

    11. Outline Synchronization Requirements Mobile backhaul network Concerns on synchronization

    12. Concerns & Summary The requirements for RAN is clear and urgent Radio Access Network is on the early stage of moving to IP transport Using GPS will affect the flexible deployment of BS, we really need a new synchronization technology to substitute GPS, epically though a simple Ethernet port How to distribute synchronization through packet based network? Can 1588 meet our requirements? Telecom profiles of 1588 should be standardized: network scale/ network load/ local clock accuracy Security The synchronization methods in next generation mobile network (LTE) and MESH/SON network should be paid more attention. At the same time, it is complex and more technologies in backhaul How to extend IEEE1588 or other synchronization technology so that it can be used smoothly in PBN and complex backhaul. Features needed for Backhaul nodes to support 1588 for high accuracy Different layers shall collaborate to meet the sync requirements form end to end, so what kind of mechanisms/protocols are need between different layer and technologies in backhaul? G.8261G.8261

    13. Thank you& Any questions?

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