Question about the ISL establish

[zxm-bupt]

When orchestrater establishes the intra-orbits ISLs, it will use function "sn_get_down_satellite()" as follow to find the adjacency node.

def sn_get_down_satellite(current_sat_id, current_orbit_id, sat_num):
    if current_sat_id == sat_num - 1:
        return [0, current_orbit_id]
    else:
        return [current_sat_id + 1, current_orbit_id]

And it will use "sn_get right_satellite()" as follow to establish the inter-orbits ISLs.

def sn_get_right_satellite(current_sat_id, current_orbit_id, orbit_num):
    if current_orbit_id == orbit_num - 1:
        return [current_sat_id, 0]
    else:
        return [current_sat_id, current_orbit_id + 1]

I want to know why inter-orbits function will add the current_orbit_id and intra-orbits function will add the current_sat_id. They maybe have been confused.

I think the satellites in same orbit should not have same id.

[yangtaodeng]

Hi, sn_get_down_satellite() is used for intra-orbits ISLs. That's right. And they have the same orbit_id.
It is the same for sn_get_right_satellite(). The adjacent satellites have the same intra_orbit_id ("current_sat_id") but different orbit_id.

[zxm-bupt]

I understand what you mean. Thank you very much.