Abstract: A system and method for allowing legacy circuit switch user equipment (CS UE) to operate via a packet switch system, such as an IP Multimedia Subsystem (IMS) system, is provided. The mobility and session control aspects of communications with the legacy CS UE is separated. A user agent is placed in the receiving node (e.g., a home node B) that acts as the SIP agent for the CS UE for session control. An interworking function is provided to allow mobility between the macro CS network and the PS (e.g., IMS) network. Hand-back and hand-in procedures with service continuity are also provided.

Abstract: A system and method for providing user equipment (UE) mobility between a packet-switched system and a circuit-switched system is provided. In an embodiment, handover from a circuit-switched connection via a 3G Home Node B (3G HNB) to a circuit-switched connection via a Base Station System (BSS) is provided. In another embodiment, handover from a packet-switched connection via the 3G HNB to a circuit-switched connection via a BSS is provided. In yet another embodiment, handover from a packet-switched connection via a Long Term Evolution (LTE) access point to a circuit-switched connection via a 3G HNB is provided. Once handover is completed, an Interworking Function (IWF) is provided that acts as a Session Initiation Protocol (SIP) for translating circuit-switched signaling messages to SIP messages for packet-switched signaling. The bearer path comprises a circuit-switched bearer path to a Media Gateway (MGW), which provides a packet-switched bearer path toward the remote end.

Abstract: A base station transmits control information to a mobile station. A first control channel is transmitted to the mobile station. The first control channel contains an indication of the number of control channel occurrences in a frame. A second control channel is transmitted to the mobile station in a control subframe. The second control channel contains information for communicating a packet between the base station and the mobile station. The control subframe is determined from the number of control channel occurrences in the frame. The packet can then be communicated between the base station and the mobile station in a subframe based on the control channels transmitted.

Abstract: A system and method for allowing legacy circuit switched user equipment (CS UE) to operate via a packet-switch system, such as an IP Multimedia Subsystem (IMS) system, is provided. The mobility and session control aspects of communications with a legacy CS UE is separated. A user agent is placed in the receiving node (e.g., a home node B) that acts as the SIP agent for the CS UE for session control. An interworking function is provided to allow mobility between the macro CS network and the PS (e.g., IMS) network.

Abstract: A backbone network, comprising a first switch comprising a first port configured to communicate a data stream via an Ethernet interface, and a second port configured to communicate the data stream via a SONET/SDH interface, and a second switch comprising a third port configured to receive the data stream from the first switch via the Ethernet interface, wherein the first switch and the second switch are synchronized.

Abstract: A system and method for wireless communications is provided. A method for operating in a communications network includes receiving a codebook, the codebook includes a plurality of codewords, and determining if the codebook satisfies a constant modulus property. The method also includes in response to determining that the codebook does not satisfy the constant modulus property, converting the codebook into a codebook satisfying the constant modulus property, and storing the codebook satisfying the constant modulus property. The method further includes storing the codebook in response to determining that the codebook does satisfy the constant modulus property, and causing to transmit a transmission to a communications device, wherein the transmission is encoded using a codeword in the stored codebook.

Abstract: Methods and apparatuses for enabling Single Radio (SR)-Voice Call Continuity (VCC) of emergency calls are provided. More specifically, the methods and apparatuses provide continuity of IMS emergency sessions established in 4G access for mobility to 3G/2G access. Generally, a Mobility Management Entity (MME) in the packet switch (PS) domain provides a handover request to a Mobile Switching Center (MSC) Server in the circuit switch (CS) domain. The handover request includes an indication that the call is an emergency call and may include an indication that a Packet Switched Network Induced Location Request (PS-NI-LR) or similar location reporting procedure is required and/or a Gateway Mobile Location Center (GMLC) address. The MSC Server facilitates the handover to the CS domain via the Mg and/or Mw interface.

Abstract: A method and apparatus for tunnel packet optimization is provided. A method for communications node operation where the communications node is at a beginning of a tunnel includes receiving a message from a communications device at an end of the tunnel, processing a packet having a first source address and a first destination address, and encapsulating the packet with an outer header having a second source address and a second destination address, thereby producing a tunnel packet. The message includes a flow label related to the first source address and the first destination address. The method also includes compacting the tunnel packet based on a tunnel optimization (TO) state, and transmitting the tunnel packet towards the second destination address. The second destination address includes an address of the communications device at the end of the tunnel.

Abstract: A wireless communication system and method is disclosed. The system and method includes at least one base station controller setting resource allocation priority and producing a carrier loading information request in response to a request made by a mobile unit; a plurality of base stations coupled to at least one base station controller, each of the plurality of base stations operates on a plurality of carriers, at least one candidate base station transceiver of the plurality of base stations receiving the carrier loading information request, determining its carrier loading information, and responding with a carrier loading information response; and the at least one base station controller operating to assign the mobile unit to at least one candidate carrier within the one responding candidate base station of the plurality of base stations based upon both set resource allocation priority and received carrier loading information.

Abstract: Prefix searches for directing internet data packets are performed in a prefix search integrated circuit. The integrated circuit includes an array of search engines, each of which accesses a prefix search tree data structure to process a prefix search. An SDRAM is dedicated to each search engine, and SDRAMs share address and control pins to plural search engines on the IC chip. Internal nodes of the tree data structure are duplicated across banks of the SDRAMs to increase bandwidth, and leaf nodes are stored across the SDRAM banks to reduce storage requirements. Within each search engine, data stored in a data register from an SDRAM is compared to a prefix search key stored in a key register. Based on that comparison, an address is calculated to access further tree structure data from the SDRAM. Packet descriptors containing search keys are forwarded to the search engines from an input queue and the search results are forwarded to an output queue, the same packet order being maintained in the two queues.

Abstract: A system and method for synchronized and coordinated beam switching and scheduling in a wireless communications system is provided. A method for controller operation includes determining a beam cycle pattern, sharing the beam cycle pattern with neighboring controllers, receiving beam information from a communications device, generating scheduling information from the beam cycle pattern and beam cycle patterns from other controllers, receiving a transmission intended for the communications device, and causing the transmission to be transmitted to the communications device. The beam cycle pattern includes a list of beam patterns transmitted by the controller, and the transmission is transmitted using the scheduling information and the received beam information.

Abstract: A method and system for remote session control of IP Multimedia Subsystem (IMS) sessions, wherein media is established using one or more devices, and multi-media session/session control for multi-media session is provided by a device which may or may not be the same as the device on which the media is established. A method and system is also provided to transfer media from one device to one or more devices retaining multi-media session/session control on a transferring device.

Abstract: Systems and methods for interworking between two different networks are presented. In one embodiment, a method for wireless communication includes requesting a network access from an access point of a first network, and transmitting an EAP authentication request from the access point to a user end. An EAP authentication request response is sent from the user end to the access point. The EAP authentication request response includes an attach type indicator that indicates to a gateway associated with the access point whether the attach request is an initial attachment or a handover from a second network.

Abstract: A method and apparatus for home agent redirect is provided. A method for redirecting a device from a first home agent to a second home agent includes sending a first message to the first home agent, receiving a second message from the first home agent, and sending a third message to the second home agent. The first message includes a binding update, and the second message includes a binding acknowledgement and a redirect indication that the device is being redirected to the second home agent. The third message includes a binding update, and an address of the first home agent.

Abstract: A system and method for creating multiple mobility profiles per subscriber in wireless communications systems is provided. A method includes receiving a request for service from a terminal, sending a request for authorization of the terminal to a server, receiving, in response to the request for authorization, an indication that the terminal is authorized, and granting access to the terminal. The indication includes a mobility classification associated with the terminal. The mobility classification is based on the terminal's operating conditions.

Abstract: A system for link-independent multihoming in a network having heterogeneous access network technologies is disclosed, providing such multihoming in a manner transparent to IP connections. The system of the present invention provides constructs and methods for: discovering and selecting a multihoming server; selecting a primary media access control (MAC) address; associating multiple link addresses with a MAC address; and forwarding packets via the multihoming server based on certain defined policies.

Abstract: System and method for scheduling spectrum sensing in cognitive radio systems. A method comprises sensing an availability of a spectrum band, computing a duration of an inter-sensing time block based on the availability of the spectrum band, and scheduling an occurrence of the spectrum sensing operation using the duration of the inter-sensing time block. Computing the duration of the inter-sensing time block based on the availability of the spectrum band allows for an optimization of communications of the cognitive radio system, thereby increasing spectral efficiency and reducing interference to licensed communications.

Abstract: A system and method for mobility restriction in wireless communications systems is provided. A method for base station operations includes receiving a request for service from a terminal, sending a request for authorization of the terminal to a controller, receiving in response to the request for authorization, an indication that the terminal is authorized, and granting access to the terminal. The indication includes a mobility restriction classification associated with the terminal.

Abstract: A system and method for quantization of channel state information is provided. A method for operating in a wireless communications system includes estimating a communications channel between a controller and a mobile device, thereby producing a channel estimate, parameterizing the channel estimate with principal angle vectors ? and ?, quantizing the principal angle vectors, thereby producing quantized values, and transmitting the quantized values to the controller.

Abstract: Methods and apparatuses are provided for searching a least-cost path between a source node and a destination node in a communication network. A set of costs associated with least-cost paths from the source node to a set of intermediate nodes is first determined. A least-cost path in a reverse direction from the destination node to an intermediate node is also determined. The intermediate node is selected based at least on a first cost associated with the least-cost path from the destination node to the intermediate node, and a second cost associated with a least-cost path from the source node to the intermediate node that was first determined. Accordingly, the least-cost path between the source node and the destination node might then be calculated by using the second cost as heuristic information.