ISO 21210-2012 pdf free download

ISO 21210-2012 pdf free download.Intelligent transport systems Communications access for land mobiles (CALM) lPv6 Networking
Systémes intelligents de transport — Accès aux communications des services mobiles terrestres (CALM) — Gestion de réseau lPv6.
6.5.2 IPv6 address configuration for ‘mobile ITS-S lPv6 LAN nodes’
6.5.2.1 An ‘ITS-S IPv6 mobile router’ shall be allocated an IPv6 prefix of a maximum length of 64 bits (/64 or smaller) arid be configured with all necessary network parameters (either statistically or dynamically), the specification of which is outside the scope of this International Standard.
A ‘mobile ITS.S IPv6 LAN’ comprising more than one lPv6 subnet shall be allocated a prefix length smaller than 64 bits.
NOTE I A f64 lPv6 prefix is sufficient for a ‘mobile ITS-S lPv6 LAN comprising only one lPv6 subnet.
NOTE 2 The topological meaning of the lPv6 addresses and the lifetime have an impact on the maintenance of session continuity since ‘mobile ITS-S lPv6 LANs’ typically change their point of attachment to the Internet (possibly using the same or a distinct medium, i.e. lPv6 interfaces). Given that lPv6 addresses are used to identify the node itself and its position In the Internet topology, this would presumably require the ‘mobile ITS-S lPv6 LAN nodes’ to change their lPv6 prefix each time the external lPv6 interface of the MR is attached to a different AR, This is inefficient and prevents nodes deployed in these mobile ITS-S lPv6 LANs from being ea&Iy reachable from the Internet at a permanent IPv6 address and possibly retrieved by peer communicating nodes through the DNS by referring to the domain name. A set of protocols has, therefore, been specified in order to deal with these matters, which is referred to as ‘mobility support’.
NOTE 3 Although the term ‘permanenr mentioned In Note 2 is usually used at the IETF, no IPv6 prefix can be assumed to be allocated for the lifetime of the equipment (e.g. a vehicle). The reason is that the provider of the IPv6 address space (‘Internet Service Provider’) leases lPv6 addresses and can renumber its network or can itself be allocated a new IPv6 prefix. Also, the lPv6 prefix allocated to vehicles, in particular, can be changed once the vehicle is sold to another user, when It crosses national boundaries or possibly on the fly in order to, for example, provide for anonymity.
NOTE 4 The provisions for communication class 8 (continuous Internet connectivity) allow recording lPv6 addresses of ‘mobile ITS-S lPv6 LAN nodes’ in the DNS, whereas the provisions for communication class 7 (non-continuous Internet connectivity) do not. However, registering an lPv6 address in the DNS is useful in communication class 7 for sessions not initiated froni the ‘mobile ITS-S IPv6 LAN’. The difference of the lPv6 address initialization between continuous and non- continuous Internet connectivity is the adoption of NEMO (as defined in RFC 3963) or not. NEMO is required to maintain sessions during haridovers, As such, it provides seamless cross-access network handover. In NEMO, the MR has two types of lPv6 addresses known as the ‘Home Address (HoA)’ and ‘Care-of Address (CoA)’. HoA is assigned whatever the topological location of the MR. On the other hand, C0A is assigned temporarily at the network visited (e.g. the AR on the roadside). The MR registers the pair of H0A and C0A to the HA, The HA knows the topological location of the MR and forwards the packet addressed to ‘mobile ITS-S lPv6 LAN’ nodes (MNNs) using encapsuIation In addition to handover, NEMO is recommended to maintain a globally unique lPv6 pefix within a ‘mobile ITS-S IPv6 LAN’. It provides continuous Internet access and reachability to IPV6 mobile ITS-S lPv6 LANs’. Using this protocol to maintain a globally unique lPv6 prefix in both communication classes 7 and 8 eases deployment and ensures interoperability between vehicles equipped differently to meet distinct design goals.
NOTE 5 Multiple lPv6 address spaces can be deployed within a ‘mobile ITS-S lPv6 LAN’. thereby allowing the use of a particular lPv6 address space for a particular requirement (e.g. a globally unique lPv6 prefix can be used for Infotairiment, whereas another globally unique lPv6 prefix can be used by the car manufacturer for remote monitoring). Specification of this option is outside the scope of this International Standard.ISO 21210-2012 pdf free download.