II. RELATED WORK
There are some literatures on laser communication in static
or quasi-static environment, but few concerns laser node model
or laser networking technology. Ho et al. [6] proposed multihop
packet transmission for all-to-all broadcast scenario and
assumed that each node was equipped with a tunable transmitter
and a fixed-tuned receiver. This paper is an important
literature inspiring us to design a laser node with tunable laser
links. Cai and Cai [7] explored spatial multiplexing gain of
wireless networks and showed this scheme outperforms serial
TDMA transmissions in millimeter wave communication by
allowing concurrent transmissions. This work is analogical
to our motivation but we put more emphasis on slot conservation.
Literature [8] presented “light path” by transmitter
and receiver integration and employing only a set of optic
antennas for communication, thus reducing the volume and
weight of the whole system. Unfortunately, it didn’t carry out
any performance verification. Wang and Guo [9] designed a
sub path protection survival algorithm based on subordinate
virtual topology to tolerate single link failure with Wavelength
Division Multiplexing (WDM). An et al. [10] proposed an
analytic model to demonstrate the performance of neighbor
discovery with combination of directional transmission and
Omni-directional transmission. Also they gave a scanningbased
directional neighbor discovery, but they focused on main
lobe oriented antenna pattern rather than the general antenna
scheduling.
In addition to the above research, there is quite a few
study on Optic Network or Passive Optical Network transport
network. In [11] and [12], the progress of fiber optical
networking is summarized, which implies that the dominating
study focus is on the Media Access Control protocol layer.