Patent ID: 9380607
Filing Date: 2016-06-28
CPC Classification: H04B,H04J,H04L,H04W

Claim Text:
1. A method of operating a wireless cellular system, comprising: transmitting, from a serving base station, an indication of a first reserved set of access identifiers usable for non-contention access over a first random access channel by a mobile station in a coverage area of the serving base station; transmitting, from a target base station, an indication of a second reserved set of access identifiers usable for non-contention access over a second random access channel by the mobile station in a coverage area of the target base station; enabling the mobile station to obtain, during a handover of the mobile station from the serving base station to the target base station, an indication of a non-contention reserved access identifier identifying the mobile station in the coverage area of the target base station, the non-contention reserved access identifier belonging to the second reserved set of access identifiers; receiving, at the target base station, from the mobile station, the non-contention reserved access identifier over the second random access channel; transmitting, to the mobile station, from the target base station, a feedback message comprising a timing adjustment; and receiving, at the target base station, a transmission from the mobile station, the transmission characterized by at least one adjusted operating parameter based at least in part on the feedback message.