Robust header compression indication after path switch during handover
AssigneeApple Inc.
InventorsCandy Yiu, Yujian Zhang, Yi Guo, Sudeep Palat
Life of this patent
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Abstract
Systems, methods, and devices are provided to: perform packet data convergence protocol (PDCP) deciphering of the packets to store deciphered packets in a common buffer; perform PDCP reordering of the deciphered packets in the common buffer to generated a stream or reordered packets; perform robust header compression (ROHC) decompression on the stream of reordered packets; and determine, based on a packet indication, to reset the ROHC decompression, wherein the packet indication comprises a single bit in a PDCP header set to indicate a start of ROHC reset based on a path switch during a handover from a source cell to a target cell.
Claims15
An apparatus for a user equipment (UE) configured to perform a handover from a source cell to a target cell in a wireless network, the apparatus comprising:
- a memory interface to send or receive, to or from a memory device, packets received from the source cell and the target cell;
- and
- a processor to:
- perform packet data convergence protocol (PDCP) deciphering of the packets to store deciphered packets in a common buffer;
- perform PDCP reordering of the deciphered packets in the common buffer to generate a stream of reordered packets;
- perform robust header compression (ROHC) decompression on the stream of reordered packets;
- and
- determine, based on a packet indication, to reset the ROHC decompression, wherein the packet indication comprises a single bit in a PDCP header set to indicate a start of ROHC reset based on a path switch during the handover from the source cell to the target cell.
A non-transitory computer-readable storage medium, the computer-readable storage medium including instructions that when executed by a processor of a user equipment, cause the processor to:
- process packets received from a source cell and a target cell;
- perform packet data convergence protocol (PDCP) deciphering of the packets to store deciphered packets in a common buffer;
- perform PDCP reordering of the deciphered packets in the common buffer to generate a stream of reordered packets;
- perform robust header compression (ROHC) decompression on the stream of reordered packets;
- and
- determine, based on a packet indication, to reset the ROHC decompression, wherein the packet indication comprises a single bit in a PDCP header set to indicate a start of ROHC reset based on a path switch during handover from the source cell to the target cell.
A non-transitory computer-readable storage medium, the computer-readable storage medium including instructions that when executed by a processor of a target cell in a wireless communication system, cause the processor to:
- receive partial packet data convergence protocol (PDCP) protocol data units (PDUs) from a source cell in the wireless communication system, the partial PDCP PDUs comprising robust header compression (ROHC) by the source cell;
- perform PDCP ciphering on the partial PDCP PDUs to generate ciphered PDCP PDUs;
- send the ciphered PDCP PDUs to a user equipment (UE);
- and
- after release of the source cell to complete a path switch to the target cell:
- perform ROHC on data received from a core network of the wireless communication system;
- and
- generate a packet to indicate a start of a ROHC reset to the UE, wherein the packet to indicate the start of the ROHC reset comprises a single bit in a PDCP header set to indicate the start of the ROHC reset.
Dependencies are inferred from the claim text.