时隙波分复用网光收发器配置方法的研究
摘要
WDM(Wavelength Division Multiplexing,波分复用)是利用多个激光器在单根光纤上同时发送不同波长激光的技术。数据(文本、语音、视频等)调制后在它独有的波段上传输。
就目前成熟的技术而言,光收发器工作的波长通常都是固定的,即只能在一个波长上面工作。通常而言,一个WDM系统内会使用多个波长。那么在一个网络节点中,如果使用固定的光收发器,分配给该节点可用波长数越多,需要配置的光收发器数目也随之增加,网络的成本会大幅度提高。而节点如果使用可调谐的光收发器,该设备可在不同的波长上工作,故节点只需配置一套可调谐设备,但是就目前而言,可调谐设备很昂贵。
此外如果把整个波长都分配给某个连接,当该连接并不需要整个波长带宽时,剩余的带宽资源就被浪费掉了,信道利用率低下。而把单个波长细分为时隙,单个连接需要多少带宽资源就分配相应的时隙数,这样就提高了信道利用率。
正是在以上前提下,本文研究WDM网络的光收发器配置方案。目的在于使用少数固定光收发器前提下,通过合理的分配有限的波长以及时隙,使得信道能够实现较高的共享,同时网络成本也经济。
WDM (wavelength division multiplexing) is such a technique that can transmit laser signals on different wavelengths in a single fiber. Modulated data(text, voice, video etc) can transmits in its own wavelength.
At present, the optical transmitter and receiver are fixed which means it can only works on one wavelength. Generally, there is more than one wavelength in a WDM system. So a node in the WDM system has to install enough fixed transmitters and receivers to use those wavelengths. The cost of building the system increases as the increasing of the numbers of wavelength. On the other way, tunable transmitter can work on different wavelengths, but it is too expensive to use.
If an entire wavelength is assigned to a given connection, it can lead to lower channel utilization when the connection doesn’t need all the bandwidth. It can be solved by dividing the wavelength into fixed length time slots. When a connection comes, the system provides it enough slots, the exact the numbers according to the connection’s bandwidth requirements. And the rest time slots can be assigned to different connection.
This paper mainly studies the configuration of optical transmitters and receives of WDM network. Although using a few fixed transmitters and receivers, this configuration can achieve high channel utilization through properly assigning wavelengths and slots.
就目前成熟的技术而言,光收发器工作的波长通常都是固定的,即只能在一个波长上面工作。通常而言,一个WDM系统内会使用多个波长。那么在一个网络节点中,如果使用固定的光收发器,分配给该节点可用波长数越多,需要配置的光收发器数目也随之增加,网络的成本会大幅度提高。而节点如果使用可调谐的光收发器,该设备可在不同的波长上工作,故节点只需配置一套可调谐设备,但是就目前而言,可调谐设备很昂贵。
此外如果把整个波长都分配给某个连接,当该连接并不需要整个波长带宽时,剩余的带宽资源就被浪费掉了,信道利用率低下。而把单个波长细分为时隙,单个连接需要多少带宽资源就分配相应的时隙数,这样就提高了信道利用率。
正是在以上前提下,本文研究WDM网络的光收发器配置方案。目的在于使用少数固定光收发器前提下,通过合理的分配有限的波长以及时隙,使得信道能够实现较高的共享,同时网络成本也经济。
WDM (wavelength division multiplexing) is such a technique that can transmit laser signals on different wavelengths in a single fiber. Modulated data(text, voice, video etc) can transmits in its own wavelength.
At present, the optical transmitter and receiver are fixed which means it can only works on one wavelength. Generally, there is more than one wavelength in a WDM system. So a node in the WDM system has to install enough fixed transmitters and receivers to use those wavelengths. The cost of building the system increases as the increasing of the numbers of wavelength. On the other way, tunable transmitter can work on different wavelengths, but it is too expensive to use.
If an entire wavelength is assigned to a given connection, it can lead to lower channel utilization when the connection doesn’t need all the bandwidth. It can be solved by dividing the wavelength into fixed length time slots. When a connection comes, the system provides it enough slots, the exact the numbers according to the connection’s bandwidth requirements. And the rest time slots can be assigned to different connection.
This paper mainly studies the configuration of optical transmitters and receives of WDM network. Although using a few fixed transmitters and receivers, this configuration can achieve high channel utilization through properly assigning wavelengths and slots.
引文
[1]顾生华.光纤通信技术.北京邮电大学出版社,2005.1,43-67
[2]虞益诚,李晓玲.基于DWDM全光网关键技术的探究.上海应用技术学院学报, Vol.4 No.1:29-32
[3]乐孜纯.光网络组网技术分析.机械工业出版社,2004.9,33-47
[4]J. Cai, A. Fumagalli, and I. Chlamtac, The Multitoken Interarrival Time (MTIT) access protocol for supporting variable size packets over WDM ring network。IEEE J. Select. Areas Commun.。vol.18,pp.2094–2104,Oct. 2000
[5]M. Marsan, A. Bianco, E. Leonardi, A. Morabito, and F. Neri.All-optical WDM multi-rings with differentiated QoS.IEEE Commun. Mag.,vol. 37, pp. 58–66, Feb. 1999.
[6]Christophe S. Jelger,Jaafar M. H. Elmirghan. A Slotted MAC Protocol for Efficient Bandwidth Utilization in WDM Metropolitan Access Ring Networks. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, vol 21, no. 8, october 2003
[7]邱昆,王晟,邱琪.光纤通信系统.电子科技大学出版社,2005.12,172-173
[8]于金辉,范戈.光突发交换技术.光通信技术, Vol.26 No.5:38-39
[9]Qiao C, Yoo M. Optical burst switching (OBS)-A new paradigm for an optical internet. Journal of High Speed Networks,1999(8):69-84.
[10]温海波,李乐民.光突发交换技术原理及其相关技术.通信与信息技术,2002(6)
[11]顾玉娟.无线光通信技术研究.山东通信技术,Vol.26 No.4:31-34
[12]邓永红,林革光.无线通信技术综述.数字通信世界,2006(2):65-68
[13]Bo wen,Ramakrishna Shenai,Krishna Sivalingam. Routing,wavelength and time-slot-assignment algorithms for wavelength-routed optical wdm/tdm network. journal of lightwave technology.vol 23,no.9,September 2005
[14]N.F.Huang,J.P.Jue,and C.P.Wang. A novel all-optical transport network with time shared wavelgnth channels.IEEE J.Sel.Areas Commun.,vol.18,no.10, October 2000
[15]S.Subramaniam,E.J.Hardre,and H.A.Choi.Schduling multirate session in time division multiplexed wavelength-routing network.IEEE J.Sel.Areas Commun.,vol 18,no.10,pp,2105-2110,October 2000.
[16]R.Srinivasan and A.K.Somani. A generalized framework for analyzing time-space switched optical networks. IEEE J.Sel.Areas Commun.vol.20,no.1,pp.202-215,2002.
[17]Subranmaniam.S,Barry.R.A. Wavelength assignment infixed routing WDM networks[C].IEEE ICC,1997,1:406-410.
[18]Monkhtar.A,Azizoqlu.M.Adaptive wavelength routingin all-optical networks[J].IEEE/ACM Transactions onNetworking,1998:6(2):197~206.
[19]Gibong Jeong,Ayanoglu E.Comparison of wavelength-interchanging and wavelength-selective cross-connects in multiwavelength all-optical networks,INFOCOM'96. March 1996,Vol.l:156-163.
[20]Chlamtac I.,Ganz A.,Karmi G.Purely optical networks for Terabit communication, INFOCOM'89.April 1989,Vol.3:887-896.
[21] Karasan.E,Ayanoglu.E.Effects of wavelength routing and selection algorithms on wavelength conversion gain in WDM optical networks[J].IEEE/ACM Transactons on Networking.1998,6(2):186-196.
[22]Xu Shizhong,Li Lemin,Wang Sheng.Wavelength assignment for dynamic traffic in WDM networks.IEEE ICON2000.Sept 2000:375-379.
[23]Zhang Xijun,QIAO Chunming.Wavelength assignment for dynamic traffic in mufti-fiber WDM network.Proc ICCCN'98.Oct 1998:479-485.
[24]徐世中,李乐民,王晟.WDM光传送网中支持优先级的波长分配算法[J].通信学报,2002,23(4):35-41.
[25]陆传赉.排队论.北京:北京邮电学院出版社,1994.5,94-99
[26]李馨,叶明.OPNET Modeler网络建模与仿真.西安:电子科技出版社,2006.2,1-5
[27]孙屹.opnet通信仿真开发手册.北京:国防工业出版社,2005.1,178-189
[2]虞益诚,李晓玲.基于DWDM全光网关键技术的探究.上海应用技术学院学报, Vol.4 No.1:29-32
[3]乐孜纯.光网络组网技术分析.机械工业出版社,2004.9,33-47
[4]J. Cai, A. Fumagalli, and I. Chlamtac, The Multitoken Interarrival Time (MTIT) access protocol for supporting variable size packets over WDM ring network。IEEE J. Select. Areas Commun.。vol.18,pp.2094–2104,Oct. 2000
[5]M. Marsan, A. Bianco, E. Leonardi, A. Morabito, and F. Neri.All-optical WDM multi-rings with differentiated QoS.IEEE Commun. Mag.,vol. 37, pp. 58–66, Feb. 1999.
[6]Christophe S. Jelger,Jaafar M. H. Elmirghan. A Slotted MAC Protocol for Efficient Bandwidth Utilization in WDM Metropolitan Access Ring Networks. IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, vol 21, no. 8, october 2003
[7]邱昆,王晟,邱琪.光纤通信系统.电子科技大学出版社,2005.12,172-173
[8]于金辉,范戈.光突发交换技术.光通信技术, Vol.26 No.5:38-39
[9]Qiao C, Yoo M. Optical burst switching (OBS)-A new paradigm for an optical internet. Journal of High Speed Networks,1999(8):69-84.
[10]温海波,李乐民.光突发交换技术原理及其相关技术.通信与信息技术,2002(6)
[11]顾玉娟.无线光通信技术研究.山东通信技术,Vol.26 No.4:31-34
[12]邓永红,林革光.无线通信技术综述.数字通信世界,2006(2):65-68
[13]Bo wen,Ramakrishna Shenai,Krishna Sivalingam. Routing,wavelength and time-slot-assignment algorithms for wavelength-routed optical wdm/tdm network. journal of lightwave technology.vol 23,no.9,September 2005
[14]N.F.Huang,J.P.Jue,and C.P.Wang. A novel all-optical transport network with time shared wavelgnth channels.IEEE J.Sel.Areas Commun.,vol.18,no.10, October 2000
[15]S.Subramaniam,E.J.Hardre,and H.A.Choi.Schduling multirate session in time division multiplexed wavelength-routing network.IEEE J.Sel.Areas Commun.,vol 18,no.10,pp,2105-2110,October 2000.
[16]R.Srinivasan and A.K.Somani. A generalized framework for analyzing time-space switched optical networks. IEEE J.Sel.Areas Commun.vol.20,no.1,pp.202-215,2002.
[17]Subranmaniam.S,Barry.R.A. Wavelength assignment infixed routing WDM networks[C].IEEE ICC,1997,1:406-410.
[18]Monkhtar.A,Azizoqlu.M.Adaptive wavelength routingin all-optical networks[J].IEEE/ACM Transactions onNetworking,1998:6(2):197~206.
[19]Gibong Jeong,Ayanoglu E.Comparison of wavelength-interchanging and wavelength-selective cross-connects in multiwavelength all-optical networks,INFOCOM'96. March 1996,Vol.l:156-163.
[20]Chlamtac I.,Ganz A.,Karmi G.Purely optical networks for Terabit communication, INFOCOM'89.April 1989,Vol.3:887-896.
[21] Karasan.E,Ayanoglu.E.Effects of wavelength routing and selection algorithms on wavelength conversion gain in WDM optical networks[J].IEEE/ACM Transactons on Networking.1998,6(2):186-196.
[22]Xu Shizhong,Li Lemin,Wang Sheng.Wavelength assignment for dynamic traffic in WDM networks.IEEE ICON2000.Sept 2000:375-379.
[23]Zhang Xijun,QIAO Chunming.Wavelength assignment for dynamic traffic in mufti-fiber WDM network.Proc ICCCN'98.Oct 1998:479-485.
[24]徐世中,李乐民,王晟.WDM光传送网中支持优先级的波长分配算法[J].通信学报,2002,23(4):35-41.
[25]陆传赉.排队论.北京:北京邮电学院出版社,1994.5,94-99
[26]李馨,叶明.OPNET Modeler网络建模与仿真.西安:电子科技出版社,2006.2,1-5
[27]孙屹.opnet通信仿真开发手册.北京:国防工业出版社,2005.1,178-189