Patent Number: 6,490,254

Title: Packet loss tolerant reshaping method

Abstract: A reshaper is provided in a DLC (Data Link Control) layer of a WLAN (Wireless Local Area Network) system. The system can be configured to support various link and network protocols such as ATM (Asnynchronous Transfer Mode), Ethernet and IP (Internet Protocol). The DLC reshaper overcomes time distortion of a stream of packets or cells that is introduced as the stream passes through the WATM, by restoring or maintaining proper time intervals between packets or cells in a stream. Thus, an output stream of packets or cells from the DLC reshaper is not slipped or shifted in phase, and does not include jitters. The DLC reshaper uses ARQ (Automatic Repeat Request) sequence numbers of the packets or cells to detect when one or more packets are discarded or lost. The DLC reshaper can determine time intervals for packets or cells in a stream based on a PCR (Peak Cell Rate) for the connection that is being supported, and ARQ sequence numbers of the packets or cells. The DLC reshaper can also determine specific transmission times for the packets or cells in the stream, based on the PCR, the ARQ sequence numbers, and a reference time such as a transmission time of a first packet or cell.

Inventors: Larsson; Mikael (Sollentuna, SE), Larsson; Peter (Singapore, SG), Ljunggren; Per (Alingsis, SE)

Assignee: Telefonaktiebolaget LM Ericsson

International Classification: H04L 12/56 (20060101); H04Q 11/04 (20060101); H04J 001/16 ()

Expiration Date: 12/03/2019