公开(公告)号：EP3425990A1

公开(公告)日：2019-01-09

申请号：EP18185537.0

申请日：2015-06-03

Applicant: Apple Inc.

Inventor： TABET, Tarik ,  KIM, Youngjae ,  MUJTABA, Syed Aon

IPC: H04W74/08 ,  H04W74/00

Abstract: Enhanced random access procedures for link-budget-limited user equipment (UE) devices are disclosed. A user equipment device may transmit a first message containing a Physical Random Access Channel (PRACH). The PRACH contains instances of a Zadoff-Chu sequence, and may be transmitted repeatedly as part of a single random attempt, to facilitate correlation data combining at the base station. The available Zadoff-Chu sequences may be partitioned among a plurality of sets, each set being associated with a respective Doppler shift range (or frequency hop pattern or time repetition pattern). A UE device may signal Doppler shift (or other information) to the base station by selection of one of the sets. The first PRACH transmission and the following PRACH transmission may occur in consecutive subframes. A UE device may select from a special set of Zadoff-Chu sequences (different from a conventional set of sequences), to signal its status as a link-budget-limited device.

公开(公告)号：EP3406094A1

公开(公告)日：2018-11-28

申请号：EP17708409.2

申请日：2017-02-21

Applicant: Apple Inc.

Inventor： BELGHOUL, Farouk ,  SMAINI, Lydi ,  TABET, Tarik ,  MUJTABA, Syed Aon

IPC: H04W16/14

Abstract: A wireless communication device may conduct first wireless communications over a first frequency band according to a first radio access technology (RAT), and may detect second wireless communications conducted over the first frequency band according to a second RAT while the wireless communication device is conducting the first wireless communications. The wireless communication device may then adjust characteristics and/or parameters associated with the first wireless communications based on the detected second wireless communications. In a specific example, a wireless communication device conducting Wi-Fi communications in the 5 GHz band may detect cellular communications (e.g. LAA/LTE-U communications) also conducted in the 5 GHz band while the wireless communication device is conducting the Wi Fi communications. The wireless communication device may then adjust characteristics and/or parameters associated with its Wi-Fi communications based on the detected signals/frequencies of the cellular (LAA/LTE-U) communications.

公开(公告)号：EP3138349B1

公开(公告)日：2018-08-29

申请号：EP15732099.5

申请日：2015-06-03

Applicant: Apple Inc.

Inventor： TABET, Tarik ,  KIM, Youngjae ,  MUJTABA, Syed Aon

IPC: H04W74/08 ,  H04W74/00

CPC classification number: H04W74/0833 ,  H04W74/004 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/1242 ,  Y02D70/126 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/26

Abstract: Techniques are described for wireless communication. A first method includes identifying a first interval for an uplink transmission in a shared radio frequency spectrum band; identifying a second interval for the uplink transmission; comparing the first interval with the second interval; and determining uplink resources to use for the uplink transmission based at least in part on the comparison of the first interval with the second interval. A second method includes transmitting one or more assignments of uplink resources to use for an uplink transmission in a shared radio frequency spectrum band; detecting a duration of the uplink transmission; and identifying uplink resources used for the uplink transmission based at least in part on the detecting.

公开(公告)号：EP3138349A1

公开(公告)日：2017-03-08

申请号：EP15732099.5

申请日：2015-06-03

Applicant: Apple Inc.

Inventor： TABET, Tarik ,  KIM, Youngjae ,  MUJTABA, Syed Aon

IPC: H04W74/08 ,  H04W74/00

CPC classification number: H04W74/0833 ,  H04W74/004 ,  Y02D70/00

Abstract: Techniques are described for wireless communication. A first method includes identifying a first interval for an uplink transmission in a shared radio frequency spectrum band; identifying a second interval for the uplink transmission; comparing the first interval with the second interval; and determining uplink resources to use for the uplink transmission based at least in part on the comparison of the first interval with the second interval. A second method includes transmitting one or more assignments of uplink resources to use for an uplink transmission in a shared radio frequency spectrum band; detecting a duration of the uplink transmission; and identifying uplink resources used for the uplink transmission based at least in part on the detecting.