Optical packet switching offers the possibility of increased granularity and more effective use of bandwidth in large capacity systems, on a scale of Tb/s. The natural integration of optical packet switching in photonic technology opens up the possibility of packet switching in transparent optical channels, where the packets remain from end-to-end in the optical domain, without the necessity of optoelectronic conversion. Therefore, the optical switching must be robust enough in order to provide conditions to solve the contention between optical packets in access networks, where the traffic is less aggregated. This work presents alternative schemes of contention resolution between optical packets to be used in access networks, without using the already established, but more expensive, wavelength conversion of WDM systems. © Springer-Verlag 2004.3124 272281Bannister, J., Touch, J., Willner, A., Suryaputra, S., How many wavelengths do we really need? A study of the performance limits of packet over wavelengths (2000) Optical Magazine Networks, pp. 17-28Barbosa, F.R., Maia, D., Pezzolo, L., Sachs, A.C., Salvador, M.R., Optical Pachet Switching Node for Metro-Access Networks (2003) Proc. of European Conference on Optical Communications - ECOC'2003Bonani, L.H., Furtado, M.T., Moschim, E., Barbosa, F.R., Analysis of Optical Packet Switching Performance with Spatial Contention Resolution for Optical Access Networks (2003) Proc. of IASTED CSN'2003, pp. 418-423Choudhury, A.K., Li, V.O.K., Performance analysis of deflection routing in the Manhattan Street network (1991) Proc. IEEE ICC, pp. 1659-1665Chamltac, I., Fumagali, A., An Optical Switch Architecture for Manhattan Networks (1993) IEEE J.Select. Areas Communic., 11 (4), p. 550Barbosa, F.R., Sachs, A.C., Furtado, M.T., Rosolem, J.B., Optical Packet Switching: A transmission and recovery demonstration using an SCM header (2001) XIX Simpósio Brasileiro de Telecomunicações - SBT'2001Bonani, L.H., Sachs, A.C., Furtado, M.T., Moschim, E., Yamakami, A., Non-Uniformly Distributed Traffic Analysis of Optical Networks with Optical Packet Switching Functionalities (2002) Proc. of SBMO'2002, pp. 163-167. , paper ST7.2Tucker, R.S., Zhong, W.D., Photonic packet switching: An overview (1999) IEICE Transactions on Communications, E82-B (2), pp. 254-264Bonani, L.H., Sachs, A.C., Furtado, M.T., Moschim, E., Yamakami, A., Optical Network Analysis under Non-uniform Traffic Distribution (2002) Proc. of ITS'2002Acampora, A.S., Shah, S.I.A., Multihop lightwave network: A comparison of store-and forward and hot potato routing (1992) IEEE Transac. on Communications, 40 (6), pp. 1082-1090Fall, K., Varadhan, K., NS Manual, , http://www.isi.edu/nsnam/ns/doc/index.html,lastaccessin02/10/2004, UC Berkeley, August 2001Bonani, L.H., Barbosa, F.R., Moschim, E., Performance and Dimensioning Analysis of Optical Packet Switching Access Networks (2004) Proceedings of ICT'2004Breslau, L., Advances in Network Simulation (2000) IEEE Computer Magazine, 33, pp. 59-67