RoHC optimizations for burst losses

摘要

Systems and methods are disclosed for optimizing Robust Header Compression (RoHC) to protect against context desynchronization resulting from a burst of lost packets. In one embodiment, a method of operation of a radio node to adapt a RoHC compressor of a radio node based on a transmit channel quality metric is provided. In another embodiment, systems and methods relating to improved RoHC SN decoding are disclosed. In one embodiment, a method of operation of a radio node includes determining a size of a Packet Data Convergence Protocol (PDCP) Sequence Number (SN) gap for a radio link between the radio node and a second radio node, and performing RoHC SN decoding based on the size of the PDCP SN gap.

主权项

1. A method of operation of a radio node, comprising:
determining a size of a Packet Data Convergence Protocol, PDCP, Sequence Number, SN, gap for a radio link between the radio node and a second radio node; and performing Robust Header Compression, RoHC, SN decoding based on the size of the PDCP SN gap by: receiving a new RoHC compressed PDCP Protocol Data Unit, PDU, for RoHC decompression; determining whether the size of the PDCP SN gap is greater than a threshold gap size; if the size of the PDCP SN gap is greater than or equal to the threshold gap size, computing a predicted reference value as a sum of a value of the RoHC SN for a last successfully decoded RoHC compressed PDCP PDU, the size of the PDCP SN gap, and a value for a decompression failure counter, the value for the decompression failure counter being a number of RoHC compressed PDCP PDUs that failed decompression since the last successfully decoded RoHC compressed PDCP PDU was received; computing a value for the RoHC SN for the new RoHC compressed PDCP PDU based on the predicted reference value and a Window-based Least Significant Bit, W-LSB, encoded RoHC SN value contained in the new RoHC compressed PDCP PDU; and performing RoHC decompression based on the value computed for the RoHC SN for the new RoHC compressed PDCP PDU.