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US 8,711,834 B2Granted
Method to prevent hyper frame number de-synchronization in a wireless communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsNeha Sharma, Vinay Kumar Shrivastava
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Abstract
A method for HFN synchronization in a wireless communication system. The method includes toggling an RSN bit value in RESET PDU, after single sided re-establishment of RLC entity. A RESET PDU with the toggled RSN bit value is transmitted to a receiver. The HFN value then updated according to a RESET ACK PDU.
Claims6
A method for Hyper Frame Number (HFN) synchronization in a wireless communication system, comprising:
- if single sided re-establishment of a Radio Link Control (RLC) entity occurs during a pending RLC reset procedure, aborting the pending RLC reset procedure and performing the single sided re-establishment of the RLC entity;
- restarting the pending RLC reset procedure and toggling a 1-bit Reset Sequence Number (RSN) value;
- transmitting a RESET Packet Data Unit (PDU) with the toggled RSN value to a receiver;
- receiving a RESET ACKnowledgement (ACK) PDU for the RESET PDU with the toggled RSN value from the receiver;
- checking the toggled RSN value included in the received RESET ACK PDU;
- and
- updating an HFN value according to the toggled RSN value and an HFN value included in the received RESET ACK PDU,
- wherein toggling the 1-bit RSN value comprises:
- toggling the RSN value to ‘1’ if the RSN value is ‘0’ before the single sided re-establishment;
- and
- toggling the RSN value to ‘0’ if the RSN value is ‘1’ before the single sided re-establishment.
8 more elements
A method for Hyper Frame Number (HFN) synchronization in a wireless communication system, comprising:
- performing double-sided re-establishment of a Radio Link Control (RLC) entity during a pending RLC reset procedure;
- restarting the pending RLC RESET procedure;
- sending a RESET Packet Data Unit (PDU) including a toggled Reset Sequence Number (RSN) value;
- receiving a RESET ACKnowledgement (ACK) PDU for the RESET PDU;
- comparing an RSN value in the received RESET ACKnowledgement (ACK) PDU with the toggled RSN value included in the RESET PDU;
- and
- updating an HFN value according to the comparing result,
- wherein the toggled RSN value is 1-bit, the toggled RSN value is ‘1’ if a RSN value is ‘0’ before the double sided re-establishment and the toggled RSN value is ‘0’ if the RSN value is ‘1’ before the double sided re-establishment.
5 more elements
Dependencies are inferred from the claim text.