PCS mobility support over fixed ATM networks

Connection routing schemes for wireless ATM

“…Several rerouting schemes have been proposed in the literature [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] based on rearrangement of end-to-end ATM connection using the following approaches: (a) by setting up a new connection every time a mobile host moves (also called connection reestablishment) [6], (b) by forwarding of ATM cells to the current location of the mobile user (connection extension) [7,8], (c) by keeping the path same up to a switch and modifying the path from the switch to the new location (anchor switch) [9], (d) by rerouting the connection as the mobile user moves (dynamic rerouting) [10][11][12][13], (e) by setting paths in advance for communications in the wireless network [14][15][16][17], and (f) hybrid schemes [18,19].…”

Dynamic guard bandwidth scheme for wireless broadband networks

“…A crossover switch (COS) is a mobility-enhanced switch on the original path of the connection between a MT and the other end-user, which acts as an anchor while rerouting the connection to the new BS. It should possess the ability to set up and release partial connections to the new and old BSs respectively, keep the connections from the other end-user to itself unchanged, and update the routing table accordingly during rerouting [17]. Depending on the scheme chosen, different switches in the network could potentially become the COS for the rerouting process.…”

“…In our work, we assume that the underlying backbone network is connection-oriented, such as Asynchronous Transfer Mode (ATM) [5], [16], [17] network, or a network that implements Multiprotocol Label Switching (MPLS) [25]. When a MT in an active call moves from one cell to another, handoff protocols [1], [15]− [17] are necessary to reroute existing active connections to the new BS.…”

“…When a MT in an active call moves from one cell to another, handoff protocols [1], [15]− [17] are necessary to reroute existing active connections to the new BS. A crossover switch (COS) is a mobility-enhanced switch on the original path of the connection between a MT and the other end-user, which acts as an anchor while rerouting the connection to the new BS.…”

Wireless ATM layouts for chain networks

“…In both scenarios, the mobility facility requires the efficient solution of several problems, such as handover (users movement), routing, location management, connection control and so forth. A detailed discussion of these and other related issues can be found in [2,5,6,16,23,27].…”