Let its SMRMC value be less than that of SMRoth. The SMC does not send location update to the GW rather a forward pointer is added from SSMR1 to new MR named as source current MR1 (SCMR1). When the GW receives a downstream Internet packets destined at the SMC, it encapsulates the packet with a header having address of SSMR1 as destination address. The GW then sends the selleck chemicals Tofacitinib packets to SSMR1. On receiving, SSMR1 decapsulates the packet and forwards it to SCMR1 through forward chain. Subsequently the SCMR1 delivers it to the SMC. But the upstream packets are sent directly to the GW without tunneling. In this case, SMC sends the upstream packets through the direct path from SCMR1 to the GW. It does not go through SSMR1. After residing some time in SCMR1 the SMC again changes its point of attachment and gets associated with another MR.

The SMC computes its SMRMC and compares SMRMC with SMRoth. Suppose this time its SMRMC is higher than SMRoth. The SMC sends location update message to the GW. This message informs the GW about SMC’s association with source serving MR2 (SSMR2). The GW updates SMC’s serving MR in its location database. After that all the packets, destined to SMC, are encapsulated by a header having SSMR2′s address as destination address and are directly sent to SSMR.Figure 1Routing of Internet packet.3.4.2. Routing of Intranet Packet Intranet traffic routing procedure is almost similar to Internet packet routing. But, in this case packets do not go through the GW. MC sends the upstream packets to its current MR.

If the packets are part of a continuing session the current MR adds an extra IP header with each packet and the address of corresponding mesh node’s serving MR is set as destination address. After that it sends the packet to the corresponding MR directly. On the other hand, if the packets initiate or respond to a new session, before sending the first packet the current MR sends a query message to the GW to know the serving MR of corresponding MC. After getting reply from the GW the current MR updates its database. Now it can follow the normal packet uplink process. Routing of downstream Intranet packets is straight forward. The serving MR of an MC receives the packets destined to it. Then the MR decapsulates and forwards the packets to the current MR of the MC. The routing of Intranet packets by the intermediate MRs is similar to that of Internet traffic.

Figure 2 shows an example scenario representing routing of Intranet traffic. Let SMC communicate with corresponding MC (CMC). The scenario is similar to that of Internet shown in Figure 1. Handling of Intranet traffic is also similar. The only difference is that, here CMC is at the other end of communication instead of GW. When SMC is within the vicinity of SSMR1, it sends AV-951 upstream packets through SSMR1. SSMR1 adds an IP header to those packets. Address of corresponding serving MR (CSMR) of CMC is set as destination address in the IP header.