Seamoby
Encyclopedia
The Seamoby Candidate Access Router Discovery, or CARD
, is an experimental protocol
outlined by RFC 4065 and RFC 4066.
The protocol is designed to speed up the hand over of IP
devices between wireless
access routers. The protocol defines a mechanism that can be used by an access router to automatically discover its neighbor with help of mobile devices. Based on some trigger, mobile devices scan for a neighbor access points and report list of newly found access point identifiers to the connected access router. The connected access router performs reverse look up using AP id(s) to identify the candidate access routers that are connected to the new found access points. The connected access router updates its neighbor list with IP address and capability of newly found access routers. The neighor list can be used for inter-AR handover decision making.
A similar idea is currently used by 3GPP SON protocol (aka ANR) for discovering candidate access points. However, ANR protocol extends RRC and X2 protocols to support CARD-like functionality for L2 network.
Card
Card primarily refers to an entire or piece of card stock.Card may refer to:-Small flat objects:* ATM card* Business card* Charge card* Cigarette card* Debit card* Flashcard* Gift card...
, is an experimental protocol
Communications protocol
A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications...
outlined by RFC 4065 and RFC 4066.
The protocol is designed to speed up the hand over of IP
Internet Protocol
The Internet Protocol is the principal communications protocol used for relaying datagrams across an internetwork using the Internet Protocol Suite...
devices between wireless
Wireless
Wireless telecommunications is the transfer of information between two or more points that are not physically connected. Distances can be short, such as a few meters for television remote control, or as far as thousands or even millions of kilometers for deep-space radio communications...
access routers. The protocol defines a mechanism that can be used by an access router to automatically discover its neighbor with help of mobile devices. Based on some trigger, mobile devices scan for a neighbor access points and report list of newly found access point identifiers to the connected access router. The connected access router performs reverse look up using AP id(s) to identify the candidate access routers that are connected to the new found access points. The connected access router updates its neighbor list with IP address and capability of newly found access routers. The neighor list can be used for inter-AR handover decision making.
A similar idea is currently used by 3GPP SON protocol (aka ANR) for discovering candidate access points. However, ANR protocol extends RRC and X2 protocols to support CARD-like functionality for L2 network.