Abstract: The invention is a system and method of initiating a communication which is transmitted by a packet data network (14), containing an optional gateway (24) and a plurality of gatekeepers (GK) to a wireless terminal (18) in one of a plurality of wireless systems. A method in accordance with the invention includes processing information relating to the communication to determine at least one area in which the communication is to be broadcast to the wireless terminal; identifying from the at least one area at least one associated destination gatekeeper to which a message should be transmitted from the gateway to initiate the communication and to which the communication is transmitted; transmitting the message from the gateway to the at least one associated destination gatekeeper; and transmitting the message from the at least one associated destination gatekeeper to at least one of the plurality of wireless systems.

Abstract: Methods and system for weighted polling of terminals in a Wireless Local Area Network (WLAN). Quality of Service (QoS) information related to WLAN terminals is obtained. A weighted polling factor may be assigned to each WLAN terminal based on the QoS information. Each WLAN terminal may be polled during a transmission period based on the weighted polling factor assigned to each WLAN terminal.

Abstract: A method, apparatus and computer program for applying a predetermined transmission process to the transmission of IP packets of a particular Internet Protocol (IP) flow in an IP network. The invention is implemented by defining in a host, such as a wireless terminal, a Quality of Service (QoS) management protocol between an IP session management protocol of the host and each of an IP layer and a link layer of the host, and defining in another apparatus, such as a wireless access point, a QoS management protocol between the QoS management protocol of the host and each of an IP layer and a link layer of the wireless access point. The wireless access point communicates with the wireless terminal via a link and allows the wireless terminal to communicate with the IP network. IP session information is configured in the wireless terminal and the wireless access point in each of the IP and link layers based on IP session management information from the IP session management protocol of the wireless terminal.

Abstract: This is a method and system to efficiently do handovers for mobile IP. The mobile node registers itself with several foreign agents using a new registration type. Only one of the foreign agents is selected to forward the data packets of a data message to the mobile node. The selection algorithm may be one based on randomness, dynamic learning, message traffic congestion, or statistical information collected at the mobile node.

Abstract: A method and apparatus for permitting mobile communications between a Mobile Services Switching Center (MSC) and a Mobile Station (MS) and between MSs by establishing for each transaction, including a call, an Internet Protocol (IP) connection in an IP network. In the invention a call to a MS is initiated by sending from the MSC to the MS, via the IP network, a call initiation message causing the MS to send a response message which includes a mobile identity that can be used as a session identifier identifying the MS. Responsive to the response message, the MSC sends a call set up message to establish an IP connection in the IP network upon which a transaction including the call is to be conducted. The call set up message includes a transaction ID which identifies the transaction. The IP network stores the transaction ID and maps the transaction ID with respect to the session identifier and the IP connection to be established.

Abstract: A lost packet recovery device, method and computer program for a VoIP system. Lost packets containing voice information are replaced using time domain interpolation techniques. A first embodiment relies on time domain harmonic scaling to interpolate a replacement frame, using the frames that come before and after the missing frame. A second embodiment replicates a frame immediately prior to the missing frame, with an energy reduction function applied that reduces the energy level of the data samples in the frame. This replicated frame replaces the missing frame. Duplicating the prior frame and reducing its energy levels are repeated until a further frame is detected. An energy restoration function is then applied to the next available frame to gradually increase its energy level and provide for a smooth transition. Using these techniques, missing frames of voice data may be replaced to mask the effects of missing frames to a listener.

Abstract: A ARQ actions taken in the data link layer control (DLC) in a wireless communications system for data transmission is implemented by using the HiperLAN/2 protocol that has a selective retransmission process to complete bitmaps when there are errors in data unit transmissions. More particularly it pertains to adaptive allocation of ARQ feedback bandwidth to economize on the use of bandwidth. This is achieved by informing the scheduler of the status of received and non-received data units at the receiver to allow adaptive ARQ feedback bandwidth during data transmission. The information about the status of data units at the receiver is provided by the ABIR flag contained in the ARQ feedback message. If there are many unacknowledged messages of,data units, the ABIR flag is set and the scheduler increases bandwidth to accommodate the traffic of retransmitted messages that were omitted.

Abstract: A method and apparatus for dynamically shifting between switching and routing packets efficiently to provide high packet throughput. The present invention provides a method for transmitting packets between an upstream node and a downstream node in a network that utilizes flow classification and labelling to redirect flows. The method includes the steps of establishing default virtual channels between the upstream node and the downstream node, receiving a packet at the downstream node, performing a flow classification at the downstream node on the packet to determine whether the packet belongs to a specified flow that should be redirected in the upstream node, selecting a free label at the downstream node, and informing the upstream node that future packets belonging to the specified flow should be sent with the selected free label attached.