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US 9,544,941 B2Granted
Air link up/down protocol (ALUDP)
AssigneeInterDigital Patent Holdings, Inc.
InventorsLei Wang, Ronald G. Murias
Life of this patent
Estimating the term…
Abstract
An air link up/down protocol (ALUDP) may be Synchronized ALUDP (S-ALUPD) or Non-Synchronized ALUDP (NS-ALUDP). A method for wireless communications includes monitoring and managing the air link status between a Subscriber Station (SS) and a Base Station (BS).
Claims14
A method for detecting coverage loss at a base station (BS), the method comprising:
- starting a coverage loss detection (CLD) timer for a subscriber station (SS) to perform a CLD procedure;
- on a condition that the CLD timer for the SS expires during the CLD procedure:
- allocating an uplink (UL) grant to the SS to enable identification of the status of the SS during the CLD procedure;
- receiving an UL data burst from the SS via the allocated UL grant during the CLD procedure;
- resetting the CLD timer for the SS based on the received UL data burst from the SS during the CLD procedure;
- and
- transmitting an unsolicited unicast ranging acknowledgement (RNG-ACK) to the SS based on the received UL data burst from the SS during the CLD procedure, wherein the unsolicited unicast RNG-ACK enables the SS, which has previously started a periodic ranging timer associated with a periodic ranging procedure, to reset the periodic ranging timer.
4 more elements
A base station (BS) configured to detect coverage loss, the BS comprising:
- a coverage loss detection (CLD) timer capable of being started for a subscriber station (SS) to perform a CLD procedure;
- a transmitter configured to allocate an uplink (UL) grant to the SS to enable identification of the status of the SS during the CLD procedure;
- a receiver configured to receive an UL data burst from the SS via the allocated UL grant during the CLD procedure;
- a processor configured to reset the CLD timer for the SS based on the received UL data burst from the SS during the CLD procedure;
- and
- the transmitter further configured to transmit an unsolicited unicast ranging acknowledgement (RNG-ACK) to the SS based on the received UL data burst from the SS during the CLD procedure, wherein the unsolicited unicast RNG-ACK enables the SS, which has previously started a periodic ranging timer associated with a periodic ranging procedure, to reset the periodic ranging timer.
3 more elements
Dependencies are inferred from the claim text.