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: 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.