基于时序串行化的水下光网络I-SAND协议研究

李燕龙; 李楷文; 王兵; 王土央

doi:10.13756/j.gtxyj.2026.250304

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基于时序串行化的水下光网络I-SAND协议研究

专题：面向6G的无线光通信 | 更新时间：2026-04-20

- 基于时序串行化的水下光网络I-SAND协议研究
- Study of the I-SAND Protocol based on Temporal Serialization Scheme in Underwater Optical Networking
- 光通信研究 2026年第2期
- 作者机构：
  
  桂林电子科技大学　认知无线电与信息处理教育部重点实验室，广西　桂林　541004
- 作者简介：
  
  李燕龙（1989-），男，陕西宝鸡人。副教授，博士，主要研究方向为水下光通信。
  王土央，副教授。E-mail：tuyangwang@guet.edu.cn
- 基金信息：
  
  国家自然科学基金资助项目(62261009);广西无线宽带通信与信号处理重点实验室基金资助项目(GXKL06240109);认知无线电与信息处理教育部重点实验室资助项目(CRKL230102);广西研究生教育创新计划资助项目(YCSW2025352)
- DOI：10.13756/j.gtxyj.2026.250304
  中图分类号： TN929
- 收稿：2025-09-16，
  
  修回：2025-10-24，
  
  纸质出版：2026-04-10
- 稿件说明：
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李燕龙，李楷文，王兵，等. 基于时序串行化的水下光网络I-SAND协议研究[J]. 光通信研究，2026(2): 250304.

Li Y L, Li K W, Wang B, et al. Study of the I-SAND Protocol based on Temporal Serialization Scheme in Underwater Optical Networking[J]. Study on Optical Communications, 2026(2): 250304.
李燕龙，李楷文，王兵，等. 基于时序串行化的水下光网络I-SAND协议研究[J]. 光通信研究，2026(2): 250304. DOI： 10.13756/j.gtxyj.2026.250304.

Li Y L, Li K W, Wang B, et al. Study of the I-SAND Protocol based on Temporal Serialization Scheme in Underwater Optical Networking[J]. Study on Optical Communications, 2026(2): 250304. DOI： 10.13756/j.gtxyj.2026.250304.

摘要

目的

随着海洋探测和国防安全等领域对水下多节点协同作业需求的增长，基于发光二极管（LED）的水下光组网技术因具有高带宽和低延迟等优势受到广泛关注。为解决光的定向辐射与自主式水下航行器（AUV）等节点移动性带来的邻居发现难问题，文章提出了基于时序串行化的改进型扇区天线邻居发现（I-SAND）协议。

方法

该协议将邻居发现过程分为3个阶段：在Improved-Hone-in阶段，通过发射周期性Hone-in信标与文章提出的信标应答机制协同工作，实现节点间时序对齐、扇区对准和邻居数量感知；在Improved-Hello-reply双向握手链路建立阶段，提出分组时隙冲突筛选（PSCS）机制，通过身份标识号（ID）过滤和多轮筛选实现冲突避免；在令牌传递阶段，通过低开销可回溯的深度优先遍历算法优化令牌传递路径，实现邻居节点的时序串行化发现。

结果

仿真表明，随着节点数量的增加，I-SAND协议的邻居发现时延显著低于基于扫描的确定性算法（SBA-D）协议和基于邻居交集迭代的邻居发现算法（ICN-ND）协议，其邻居发现效率较ICN-ND协议提升约24.7%，较SBA-D协议提升约43.6%。与SAND协议相比，I-SAND协议在节点数量较少时时延和控制开销与其相当，但随着节点数量的增加，其时延和控制开销的优化效果显著优于SAND协议。

结论

I-SAND协议基于令牌传递机制实现邻居时序串行化发现，其邻居发现时延性能和邻居发现效率显著优于SBA-D和ICN-ND协议；与SAND协议相比，在节点数量较少时，二者时延与控制开销相当，在节点数量增加时，I-SAND协议性能显著优于SAND协议。仿真对比验证了其在水下光组网中的优越性能，有效解决了定向光传输特性与AUV移动性带来的邻居发现难题。

Abstract

Objective

With the growing demand for multi-node underwater teamwork in areas like marine exploration and national security

LED-based underwater optical communication has received significant attention in underwater networking due to its high bandwidth and low latency. To tackle the problem of neighbor discovery caused by directional light signals and the movement of Autonomous Underwater Vehicles (AUV)

this paper introduces a new protocol called Improved-Sectored Antenna Neighbor Discovery (I-SAND). This protocol employs a time-based scheduling strategy to enhance the neighbor discovery process in underwater optical networks

significantly improving its speed and reliability.

Methods

The I-SAND protocol structures the neighbor discovery process into three stages. During the Improved-Hone-in phase

periodic beacon transmission coordinated with reply time slots achieves temporal and sector alignment

and enables neighbor quantity awareness. In the Improved-Hello-reply phase for two-way handshake link establishment

a Packet-Slotted Conflict Screening (PSCS) mechanism is introduced to enable adaptive collision avoidance through dynamic ID filtering and multi-round scheduling. In the token-passing phase

a low-overhead depth-first search algorithm is employed to optimize the token delivery path

achieving temporally serialized neighbor discovery.

Results

Simulation shows that the neighbor discovery latency of the I-SAND protocol increases significantly more slowly with the number of nodes compared to the Scan-based Algorithm-Deterministic (SBA-D) and the Neighbor Discovery Algorithm based on Iterative Common Neighbors (ICN-ND). Moreover

the neighbor discovery success rate of I-SAND is about 24.7% higher than that of ICN-ND and about 43.6% higher than that of SBA-D. When compared with the SAND protocol

the latency and control overhead of the I-SAND protocol are comparable to those of the SAND protocol when the number of nodes is small. As the number of nodes increases

the optimization effect of the I-SAND protocol in terms of latency and control overhead is significantly better than that of the SAND protocol.

Conclusion

The I-SAND protocol

which implements temporally serialized neighbor discovery through a token-passing mechanism

shows significantly lower neighbor discovery latency and higher success rate compared to the SBA-D and ICN-ND protocols. When compared with the SAND protocol

their latency and control overhead are comparable when the number of nodes is small. With the increase of the number of nodes

the optimization effect of the I-SAND protocol becomes more prominent. These results validate its superior performance in underwater optical networks

effectively addressing the neighbor discovery challenges posed by directional optical transmission and AUV mobility.

关键词

Keywords

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