ROHC optimization to avoid decompression failure

Patent metadata

Field	Value
Publication number	US-12550096-B2
Application number	US-202218288594-A
Country	US
Kind code	B2
Filing date	May 3, 2022
Priority date	Jun 25, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A transmitter device may be configured to perform to robust header compression optimization to improve channel throughput. In some aspects, the transmitter device may establish a first base context between the transmitter device and a receiver device, wherein a first context identifier is assigned to the first base context, establish a replication context between the devices, wherein the replication context is derivable from the first base context and a second context identifier is assigned to the replication context, and identify a new context. Further, the transmitter device may reassign the first context identifier to the new context, disassociate the second context identifier from the first context identifier, establish a second base context between the devices, wherein a third context identifier is assigned to the second base context, and associate, based on the replication context being derivable from the second base context, the second context identifier to the third context identifier.

First claim

What is claimed is:

1 . A method of wireless communication of a transmitter device, comprising:
establishing, with a receiver device, a first base context for first communications between the transmitter device and the receiver device, wherein a first context identifier is assigned to the first base context; establishing, with the receiver device, a replication context for second communications between the transmitter device and the receiver device, the replication context derivable from the first base context and a second context identifier assigned to the replication context; identifying a new context based on a first packet; reassigning, in response to identifying the new context, the first context identifier to the new context; disassociating the second context identifier from the first context identifier based on the reassigning of the first context identifier; establishing, with the receiver device, a second base context for third communications between the transmitter device and the receiver device, a third context identifier assigned to the second base context; and associating, based on the replication context being derivable from the second base context, the second context identifier to the third context identifier.

2 . The method of claim 1 , further comprising transmitting, as a derivative packet type, a second packet as a compressed packet including the second context identifier and the third context identifier.

3 . The method of claim 2 , wherein the compressed packet distinguishes between static and dynamic parts associated with the replication context that differ from the second base context.

4 . The method of claim 2 , wherein the derivative packet type is a robust header compression (ROHC) initialization and refresh context replication packet.

5 . The method of claim 1 , further comprising:
compressing, based on the replication context, a second packet to determine a compressed second packet; and transmitting the compressed second packet to the receiver device.

6 . The method of claim 5 , wherein compressing the second packet to determine the compressed second packet, comprises:
compressing, at a header compressor, the second packet according to a ROHC protocol technique corresponding to the second context identifier and the third context identifier to create the compressed second packet.

7 . The method of claim 1 , wherein reassigning the first context identifier to the new context comprises:
determining that a number of context identifiers currently in use between the transmitter device and the receiver device; and determining that the number of context identifiers is equal to a maximum number of context identifiers allocated to the transmitter device and the receiver device.

8 . The method of claim 7 , further comprising receiving RRC signaling including the maximum number of context identifiers allocated to the transmitter device and the receiver device.

9 . The method of claim 1 , wherein reassigning the first context identifier to the new context comprises:
selecting the first context identifier for reassignment based on the first context identifier being identified as least recently-used over a plurality of context identifiers assigned to the transmitter device and the receiver device.

10 . The method of claim 1 , wherein the replication context is a first replication context, and further comprising:
disassociating, based on the reassigning of the first context identifier, a fourth context identifier associated with a second replication context from the first context identifier; and establishing, with the receiver device, a third base context for fourth communications between the transmitter device and the receiver device, the fourth context identifier assigned to the second base context.

11 . A non-transitory computer-readable device having instructions thereon that, when executed by at least one computing device, causes the at least one computing device to perform operations comprising:
establishing, with a receiver device, a first base context for first communications between a transmitter device and the receiver device, wherein a first context identifier is assigned to the first base context; establishing, with the receiver device, a replication context for second communications between the transmitter device and the receiver device, the replication context derivable from the first base context and a second context identifier assigned to the replication context; identifying a new context based on a first packet; reassigning, in response to identifying the new context, the first context identifier to the new context; disassociating the second context identifier from the first context identifier based on the reassigning of the first context identifier; establishing, with the receiver device, a second base context for third communications between the transmitter device and the receiver device, a third context identifier assigned to the second base context; and associating, based on the replication context being derivable from the second base context, the second context identifier to the third context identifier.

12 . The non-transitory computer-readable device of claim 11 , wherein the operations further comprise:
transmitting, as a derivative packet type, a second packet as a compressed packet including the second context identifier and the third context identifier.

13 . The non-transitory computer-readable device of claim 12 , wherein the compressed packet distinguishes between static and dynamic parts associated with the replication context that differ from the second base context.

14 . The non-transitory computer-readable device of claim 12 , wherein the derivative packet type is a robust header compression (ROHC) initialization and refresh context replication packet.

15 . The non-transitory computer-readable device of claim 11 , wherein the operations further comprise:
compressing, based on the replication context, a second packet to determine a compressed second packet; and transmitting the compressed second packet to the receiver device.

16 . The non-transitory computer-readable device of claim 15 , wherein compressing the second packet to determine the compressed second packet, comprises:
compressing, at a header compressor, the second packet according to a ROHC protocol technique corresponding to the second context identifier and the third context identifier to create the compressed second packet.

17 . The non-transitory computer-readable device of claim 11 , wherein reassigning the first context identifier to the new context comprises:
determining that a number of context identifiers currently in use between the transmitter device and the receiver device; and determining that the number of context identifiers is equal to a maximum number of context identifiers allocated to the transmitter device and the receiver device.

18 . The non-transitory computer-readable device of claim 17 , wherein the operations further comprise receiving RRC signaling including the maximum number of context identifiers allocated to the transmitter device and the receiver device.

19 . The non-transitory computer-readable device of claim 11 , wherein reassigning the first context identifier to the new context comprises:
selecting the first context identifier for reassignment based on the first context identifier being identified as least recently-used over a plurality of context identifiers assigned to the transmitter device and the receiver device.

Assignees

• Qualcomm Inc

Inventors

• Sah Deepak
• Jain Rahul
• Sivakumar Nagamanikandan

Classifications

• H04W60/06

  De-registration or detaching · CPC title

• H04W28/06

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title

• H04W76/20

  Manipulation of established connections · CPC title

• H04L69/22

  Parsing or analysis of headers · CPC title

• H04W60/04 Primary

  using triggered events · CPC title