GB/T 44816.2-2024 in English
VALIDTechnical requirements for interoperability of access network system—Part 2：10Gbit/s symmetric passive optical networks (XGS-PON)
- Issued on:2024-10-26
- Implemented on:2025-02-01
- File Format:PDF
- Delivery:Via email within 10 business days
$1,034.00
| Standard No: | GB/T 44816.2-2024 |
| Document status: | VALID |
| Title in English: | Technical requirements for interoperability of access network system—Part 2：10Gbit/s symmetric passive optical networks (XGS-PON) |
| Title in Chinese: | 接入网系统互通性技术要求 第2部分：10Gbit/s对称无源光网络（XGS-PON） |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 10 business days |
| Issued on: | 2024-10-26 |
| Implemented on: | 2025-02-01 |
| ICS Classification: | 33.040.50-Lines, connections and circuits |
| Chinese Classification: | M42-Communication line and equipment |
| Professional Classification: | GB-National Standard |
| Related Keywords: | technical requirements
xgs-pon requirements comparison physical layer interoperability requirements pmd layer optical module parameter requirements symmetric passive optical networks |
《GB/T 44816.2-2024接入网系统互通性技术要求 第2部分：10Gbit/s对称无源光网络（XGS-PON）》由TC485（全国通信标准化技术委员会）归口，主管部门为工业和信息化部（通信）。
Introduction
Interpretation of the core content of the standard
| Technical dimensions | XGS-PON requirements | Comparison with traditional GPON |
|---|---|---|
| Transmission rate | Symmetrical 10Gbps for uplink and downlink | Asymmetric 2.5G/1.25G |
| Wavelength planning | Downlink 1577nm, Uplink 1270nm | Downlink 1490nm, Uplink 1310nm |
| DBA mechanism | Support 5 types of T-CONT dynamic allocation | Only supports 4 types of T-CONT |
Key technology analysis
1. Physical layer interoperability requirements
PMD layer must comply with YD/T 3691.2-2020 specification, optical module parameter requirements:
- OLT receiving sensitivity: ≤-28dBm
- ONU transmitting power: +4~+8dBm
- Dispersion tolerance: ≥800ps/nm
2. XGTC layer key mechanism
Burst mode overhead configuration
The uplink burst overhead includes the protection time (512bit), the preamble (0xBB521E26) and the delimiter (32/64bit). The delimiter values in different FEC states are as follows:
| FEC state | 32-bit delimiter |
|---|---|
| Enable | 0x4BDE1B90 |
| Disable | 0xA37670C9 |
OMCI protocol implementation
Management entity (ME) creation rules:
- Single-pointing ME needs to create the pointed entity first
- Mutually-pointing ME needs to create the entity with default value first
- ONU initialization must create class=instrument>ONU-G and other basic MEs
VLAN function implementation plan
| Mode type | Core ME | Typical application |
|---|---|---|
| Bridge+VLAN | Extended VLAN Tagging Operation ME | IPTV service isolation |
| Bridge+Pbit | 802.1p Mapper Service Profile ME | VoIP priority guarantee |
Implementation suggestions
- Equipment selection: It must support both ITU-T G.9807.1 and YD/T 3691 series standards
- Debugging focus: PLOAMu message response time should be controlled within 5ms
- Operation and maintenance key: Regularly check the consistency of OMCI synchronization counter (MIBsync)
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