Abstract: The radio node controller of one subnet sends a communication to an access terminal over a control channel through the infrastructure of another subnet. The radio node controller maintains an open traffic channel with an access terminal when the access terminal moves from a coverage area of the first subnet to a coverage area of the second subnet and when the access terminal uses a carrier in the first subnet that cannot be used in the second subnet. In a radio access network including a first and a second subnet, in which the first subnet includes both a first radio node controller and radio nodes that are configured in accordance with one 1xEV-DO standard and the second subnet includes radio nodes configured in accordance with another 1xEV-DO standard, the first radio node controller maintains an open traffic channel with an access terminal when the access terminal moves from the coverage area of the first subnet to the coverage area of the second subnet.

Abstract: A proxy is in communication with an internet protocol network and a mobile operator network. The proxy receives first communications from access points via the internet protocol network, transmits content from the first communications to the mobile operator network, receives second communications from the mobile operator network, and transmits content from the second communications to the access points via the internet protocol network. The proxy may perform operations based on the first and second communications received from either the access points, or from the mobile operator network. The operations performed by the proxy may include modifying the communications, saving certain information regarding the communications, performing authentication, encryption, or decryption of the communications, determining a destination for the communications, or sending the communications to a destination.

Abstract: In a radio access network, techniques for multicasting information from a radio network controller to radio nodes. The techniques further include broadcasting the information from the radio nodes to mobile access terminals. The information can include content to be delivered to the access terminals.

Abstract: Techniques for enabling a radio access network to cause an access terminal in communication with the radio access network to send an update including information about a location of the access terminal.

Abstract: A device receives information about signals detected by an access terminal, a first one of the signals corresponds to a radio node with which the access terminal is in communication, and if a second signal detected by the access terminal does not correspond to signals in use by the radio node and the access terminal, and if a condition is met, the devise causes the access terminal to alter communication with the radio node.

Abstract: A radio access network dynamically modifies a route update protocol of an access terminal in an active state that is in communication with the network, such that the access terminal reports a route update message upon satisfaction of a condition. The condition may be related to an inter-revision hard handoff, an inter-frequency hard handoff, a RF dragging prevention, a selective resource allocation, or some combination thereof.

Abstract: In a radio access network, techniques for defining a non-circular paging area in which an access terminal is to be paged based on distance-based location updating information for a sector of the network.

Abstract: A proxy is in communication with an internet protocol network and a mobile operator network. The proxy receives first communications from access points via the internet protocol network, transmits content from the first communications to the mobile operator network, receives second communications from the mobile operator network, and transmits content from the second communications to the access points via the internet protocol network. The proxy may perform operations based on the first and second communications received from either the access points, or from the mobile operator network. The operations performed by the proxy may include modifying the communications, saving certain information regarding the communications, performing authentication, encryption, or decryption of the communications, determining a destination for the communications, or sending the communications to a destination.

Abstract: A radio access network dynamically modifies a route update protocol of an access terminal in an active state that is in communication with the network, such that the access terminal reports a route update message upon satisfaction of a condition. The condition may be related to an inter-revision hard handoff, an inter-frequency hard handoff, a RF dragging prevention, a selective resource allocation, or some combination thereof.

Abstract: A methodology is provided for fault detection and service restoration in a multiservice switch on a per flow basis. An ingress source transmits the same data over each of two redundant cores. An egress receiver selects on a per flow bass which core to utilize. Bi-directional flows are not necessarily grouped together. The basic approach to fault detection is to assume that the two cores are not in lock step, but that the shelves are continually monitoring link flows for control path data as well as user data. The path monitoring is accomplished using a combination of arbiter and aggregator functions found in the service shelves and core interface cards, respectively. The arbiter transmits link test cells to both cores on a per flow basis, wherein the link test cells traverse and are monitored by respective aggregators to and from each core. When an egress arbiter determines that a flow is bad, it initiates a switch to the alternative source core, from which the flow would continue.

Abstract: The present invention is a methodology for controlled switchover of unicast and multicast data flows in packet based switching system. In some cases it is advantageous to purposefully support switchover of flows from one path to the other without causing loss of data. This is termed a “controlled” or “hitless” switchover. In accordance with the present invention switchover methodology, given that an ingress arbiter device is transmitting to both cores simultaneously, it is required that the flows to both switching cores be synchronized at an aggregator level and that an egress arbiter be given time to cease receiving packets from one Core then switch over to the other Core, and continue receiving packets.

Abstract: The present invention is a core interface mechanism that permits 1:N type port protection on the core side of the switch such that core bandwidth is not wasted by the direct connection of service cards to the switching core. In an exemplary embodiment, a core interface module supports up to two active service cards and one dedicated protection service card. To provide increased efficiency and lower cost the redundant service card does not strand user bandwidth in the switch core. In an exemplary embodiment, the core interface includes a plurality of core side input and output ports for coupling to the switching core and a plurality of card side input and output ports for coupling to the service cards. A data flow switch function couples between the core side ports and the card side ports. The data flow switch function operates to complete data flow paths between the core side ports and the card side ports.

Abstract: The present invention is a methodology for controlled switchover of unicast and multicast data flows in packet based switching system. In some cases it is advantageous to purposefully support switchover of flows from one path to the other without causing loss of data. This is termed a “controlled” or “hitless” switchover. For example, it may be required to upgrade or replace a card and it is desirous to do this without taking an “Errored Second” hit at the system level. In accordance with the present invention switchover methodology, given that an ingress arbiter device is transmitting to both cores simultaneously, it is required that the flows to both switching cores be synchronized at an aggregator level and that an egress arbiter be given time to cease receiving packets from one Core then switch over to the other Core, and continue receiving packets.

Abstract: The present invention is a methodology for providing fault detection and service restoration for a multiservice switch on a per flow basis. An ingress source transmits the same data over each of the redundant cores. An egress receiver selects on a per flow basis which core to utilize. Bi-directional flows are not necessarily grouped together. That is, for a duplex path, one direction of transmission can proceed through a first core and the other direction can proceed through the other core if required. The basic approach to fault detection is to assume that the two cores are not in lock step, but that the shelves are continually monitoring link flows for control path data as well as user data. The path monitoring is done largely in dedicated hardware and the status is passed up to a local processor within a service shelf in order that recovery can proceed quickly.

Abstract: Port cards in an ATM switch store parameters for virtual channel connections (VCCs) and virtual path connections (VPCs) in separate areas of a virtual connection parameter table (VCPT), the areas being defined by a VCC pointer and a VPC pointer. Also, a number of “free lists” are used to identify unused single locations (for VPCs) or chunks of locations (for sets of VCCs) that are available for re-allocation. Different free lists are used for different-sized sets of VCCs, i.e., sets configured to use different maximum numbers of VCI bits. When a new VPC is created, a VCPT location identified by an entry in the VPC free list is allocated, if such an entry exists. Otherwise a VCPT location is allocated by advancing the VPC pointer. De-allocation of a VPC entry proceeds in reverse order, i.e., the VPC area is shrunk by backing up the VPC pointer if possible, and if not the de-allocated entry is placed on the VPC free list.

Abstract: A method and apparatus for performing virtual connection merging in an output port of a network switch are disclosed. In the event no completely assembled packets have been received and scheduled for transmission, a partially received packet is selected for cut-through transmission prior to receipt of all cells comprising the packet. Transmission of the selected packet is initiated and a timer is started. If the timer expires prior to the receipt of an end of packet indication for the packet for which transmission has commenced, and end of packet signal is generated and transmitted and the transmission of additional cells for the cut-through packet is aborted. In this manner, delays associated with packet reassembly may be avoided and buffer sizes of reassembly buffers may be reduced.

Abstract: A method and apparatus are disclosed for selectively accessing and independently sizing connection identification tables within a network switch. Upon receipt of a data unit, such as an asynchronous transfer mode cell at an input port of an Input Output Module, a plurality of selection bits are inserted into the cell header which are used to select one of a plurality of connection identifiers. The VPI/VCI addresses are mapped into a connection identifier and the connection identifier is also inserted within the respective cell header. The connection identifier may comprise an unicast connection identifier, a multicast connection identifier, or a redundant unicast identifier. The unicast, multicast and redundant identifiers are either stored in separate tables at call setup and the tables are independently selectable via use of the selection bits stored within the cell header.

Abstract: An apparatus and technique for facilitating mapping of a Multicast Circuit Identifier ("MID") to a Local Circuit Identifiers ("CID") is disclosed. Table entries for such mapping can be disposed in non-contiguous memory locations. A pointer is employed in ca h entry to indicate the location of any subsequent memory location associated with the MID. CIDs and associated memory locations are allocated only for ports that participate in a connection. To implement the apparatus and technique a first table provides an index into a second table based upon the MID. The second table includes entries having a port identification field, a pointer field and a CID field. The CID field indicates the CID associated with the port indicated by the port identification field. The CID is written to the header of the copy of the cell to be transmitted to the indicated port.