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US 7,254,143 B2Granted
Local suspend scheme for wireless communication systems
AssigneeInnovative Sonic Limited
InventorSam Shiaw-Shiang Jiang
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AssigneeInnovative Sonic Limited
InventorSam Shiaw-Shiang Jiang
Estimating the term…
This invention provides solutions to resolve the potential security unsynchronizing problem when upper layers issue a suspend command to the RLC entity while a TFC selection exchange process has been initialised. Three solutions of this invention, can be used either in UM or in AM environment, in which the RLC entity defines a safe range factor and add it to the upper-layers-passed parameter N of the prior art to calculate a new suspend sequence number for the suspended RLC entity. During the suspension, the RLC entity will continuously pass the scheduled RLC PDUs to lower layers as long as the SN of scheduled RLC PDU is less than the new suspend sequence number. One solution of this invention is more suitable to be implemented in UM than in AM. In this solution, upper layers decide and pass to the RLC entity a suitable parameter N having a more tolerant safety range than the prior art does.
A method to improve system stability in a wireless communication system, wherein data packaged in Packet Data Units (PDUs) and a Sequence Number (SN) assigned to each data packages for monitoring purpose, upon receiving a certain type of unexpected interrupt with a parameter N, transmitting PDUs of SN up to a suspend sequence number before halting the transmission of any PDUs of SN on or after the suspend sequence number, the method comprising the steps of:
A system having means for improving system stability in a wireless communication system, wherein data packaged in Packet Data Units (PDUs) and a Sequence Number (SN) assigned to each data packages for monitoring purpose, upon receiving a certain type of unexpected interrupt with a parameter N, transmitting PDUs of SN up to a suspend sequence number before halting the transmission of any PDUs of SN on or after the suspend sequence number, the method comprising the steps of:
Dependencies are inferred from the claim text.