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Seamless roaming

As shown above, the MultiBS function speeds up the CPE roaming between the BSs, however, in any case, roaming is still accompanied by a short break in the connection. Link interruption avoidance can be reached be achieved by using two CPEs on a on the moving object, combined by with the functionalities of the InfiMUX. In this case, each CPE will independently establish a radio link with the BS , and InfiMUX will distribute data traffic between those and the InfiMUX will route the data traffic by choosing one of those links.

Let's look at the roaming algorithm with two CPEs (see Figure 8):

1. CPE1 and CPE2 have established links with the BS. In this case, no loop appears loop occurs because all radio devices are joined in one MINT area and devices the devices use a frame redirection table that takes into account the cost parameters.
2. The vehicle is moving, CPE2 breaks the link with BS1. CPE1 keeps the connection with BS1. Service  The service hasn't been interrupted, because the data exchange between the vehicle and the control center is carried out via the CPE1-BS1 link.
3. CPE2 is looking for for a BS to establish a radio link. CPE1 keeps the connection with BS1.
4. CPE2 establishes connection with BS2. CPE1 keeps the connection with BS1. When transmitting data, the InfiMUX uses one of the two links CPE1-BS1 and BS1 or CPE2-BS2, with a lower metric.
5. The vehicle is moving, CPE1 breaks the link with BS1. CPE2 keeps the connection with BS2. Data  The data transmission is performed via the CPE2-BS2 , link , service and the service hasn't been interrupted.

To make configurationTo perform the configuration, PRF interfaces should be created on the CPE1 and CPE2 devices towards InfiMUX, and on InfiMUX - PRF interfaces towards the InfiMUX. PRF interfaces should also be created on the InfiMUX towards the wireless devices. In addition, the switch groups configuration must be performed on the InfiMUX, not on the CPEs.

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