Air link up/down protocol (ALUDP)

摘要

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).

主权项

1. 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; andtransmitting 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.