支持ONU模块独立不连续收发数据的节能方法

doi:10.11959/j.issn.1000-436x.2015220

摘要/Abstract

摘要：

为有效解决绿色无源光网络中的节能效果与时延性能的矛盾，提出一种支持 ONU 模块独立不连续收发数据的节能方法。通过光网络单元的模块化，各能耗模块独立地切换睡眠或唤醒模式，从而在规定时隙内实现不连续地收发数据；通过子周期划分，将实时业务集中到第一个子周期内收发，提升了网络的总体服务质量；提出完全独立的上下行带宽分配算法，使所提方法在流量上下行不对称的应用场景更具优势。仿真表明，所提方法在保证业务时延性能的前提下，网络的能耗得到进一步降低。

关键词: 无源光网络, 光网络单元, 模块化, 独立不连续, 业务区分, 节能, 时延

Abstract:

To effectively solve the contradiction between energy-saving and packet delay performance in green passive optical network,an energy-saving scheme supporting ONU modularization with independent-discontinuous transceiving is proposed.Utilizing the technology of optical network unit modularization,each module could switch to sleep or awake mode independently and transmit data in specified time slots discontinuously.Simultaneously,to enhance the quality of service of the overall network,the real-time packets are transmitted in the first sub-cycle based on the sub-cycle division strategy.Furthermore,an independent bandwidth allocation algorithm is proposed,which makes the scheme have more advantages in the asymmetric network traffic scenarios.Simulation results verify that the proposed scheme further reduce the network energy consumption on the premise of guarantee the packet delay.

Key words: passive optical network, optical network unit, modularization, independent discontinuous, energy-saving, packet delay

熊余,管建军,王汝言. 支持ONU模块独立不连续收发数据的节能方法[J]. 通信学报, 2015, 36(7): 71-79.

Yu XIONG,Jian-jun GUAN,Ru-yan WANG. Energy-saving scheme supporting ONU modularization with independent-discontinuous transceiving[J]. Journal on Communications, 2015, 36(7): 71-79.

图/表 10

图1

表1

符号及含义"

符号	含义
Bⁿ	第n个轮询周期的总带宽
$k_{R P}^{n}$	第n个轮询周期内请求实时业务带宽的ONU数量
$k_{N P}^{n}$	第n个轮询周期内请求非实时业务带宽的ONU数量
$B_{g, u R P}^{n}$	第n个轮询周期内ONU实时业务保证带宽
$B_{g, u N P}^{n}$	第n个轮询周期内ONU非实时业务保证带宽
$B_{u R P, i}^{n}$	第n个轮询周期内ONU_i实时业务带宽请求
$B_{u N P, i}^{n}$	第n个轮询周期内ONU_i非实时业务带宽请求
$U B_{u R P, i}^{n}$	第n个轮询周期内授予ONU_i的实时业务带宽
$U B_{u N P, i}^{n}$	第n个轮询周期内授予ONU_i的非实时业务带宽
T_g	保护时隙
R_u	上行链路速率
R_d	下行链路速率
N	仿真周期数
K	ONU数量

表1

图2

表2

表3

图3

图4

图5

图6

图7

参考文献 17

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字段	大小/byte
目的地址	6
源地址	6
类型=8808	2
操作码	2
时间戳	4
标识字节	4
T_cycle周期	2
GATE帧长度	2
ONU₁实时业务上行开始时间	4
ONU₁实时业务上行长度	2
ONU₁非实时业务上行开始时间	4
ONU₁非实时业务上行长度	2
ONU₁实时业务下行开始时间	4
ONU₁实时业务下行长度	2
ONU₁非实时业务下行开始时间	4
ONU₁非实时业务下行长度	2
ONU₁GATE帧接收时间	4
ONU₂…	...
…	...
ONU_n…	...
…	...
FCS	4

参数	数值
P_ua	1.63 W
P_da	1.55 W
P _us	0.15 W
P _ds	0.15 W
P_base	0.7 W
L_G	480 byte(16 ONU)
T_ov	125 μs
T_g	5 μs
L_R	64 byte
RTT	200 μs
T_DBA	10 μs