Random backoff for extended access barring
AssigneeIntel Corporation
InventorsMo-Han Fong, Umesh Phuyal
Life of this patent
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Abstract
Technology for initiating a random access procedure by a wireless device after extended access barring (EAB) is disclosed. The wireless device can release a bar on the wireless device. The bar can prevent the wireless device from accessing a node using EAB. The wireless device can count a random backoff time using a random backoff timer. The random backoff time can include a random time between zero and a maximum backoff time period. The wireless device can transmit a random access channel (RACH) message (including physical random access channel (PRACH) preamble) from the wireless device to the node to initiate a random access procedure after the expiry of the random backoff timer.
Claims31
A method for initiating a random access procedure by a wireless device after extended access barring (EAB), comprising:
- releasing a bar on the wireless device, wherein the bar prevents the wireless device from accessing a node using EAB;
- counting a random backoff time using a random backoff timer, wherein the random backoff time is a random time between zero and a maximum backoff time period;
- and
- transmitting a random access channel (RACH) message from the wireless device to the node to initiate a random access procedure after the expiry of the random backoff timer.
A method for using adaptive random backoff based on a backoff indicator (BI) at a wireless device, comprising:
- receiving the backoff indicator (BI) at the wireless device from a node;
- counting a random backoff time using a random backoff timer, wherein the random backoff time is a random time between zero and a maximum backoff time period;
- and
- transmitting a physical random access channel (PRACH) preamble from the wireless device to the node after the expiry of the random backoff timer.
A wireless device configured for extended access barring (EAB), comprising:
- a transceiver module configured to receive EAB information from a node and transmit a random access channel (RACH) message to the node;
- a processing module configured to bar transmissions and release a bar to transmission to the node using the EAB information, wherein the bar prevents the wireless device from accessing the node using EAB;
- and
- a random backoff timer configured to count a random backoff time, wherein the random backoff time is a random time between zero and a maximum backoff time period and the random backoff timer is configured to delay a radio resource control (RRC) connection after the release of the bar for the random backoff time.
A node configured for extended access barring (EAB), comprising:
- a transceiver module configured to transmit EAB information to a wireless device, receive a random access channel (RACH) message from the wireless device, and transmit a machine type communication (MTC) specific BI parameter to the wireless device, wherein the MTC-specific BI parameter is transmitted in a random access response (RAR) media access control (MAC) layer protocol data unit (PDU);
- and
- a processing module configured to adaptively change the value of the MTC-specific BI parameter based on traffic conditions, wherein the MTC-specific BI parameter informs the wireless device of a delay between a release of an EAB bar and an attempt for a radio resource control (RRC) connection between the node and the wireless device.
Dependencies are inferred from the claim text.