Handover schemes for wireless systems

摘要

One method of wireless communication involves acknowledging that an anchor base station received a handover indication signal. Another method involves: receiving, from base stations of an active set, offset signals identifying a respective differences in time between a reference time and respective times when the base station received a ranging signal from a mobile station; and transmitting, to the mobile station, a ranging control signal in response to the respective offset signals. Another method involves transmitting, to a mobile station in response to an active set signal, a system configuration information signal including system configuration information of a base station in an active set. Another method involves determining an uplink control channel power parameter in response to channel condition signals received from base stations in an active set. Another method involves transmitting a control signal to base stations in an active set on respective control channels. Apparatuses are also disclosed.

主权项

1. A method of a user equipment (UE) in an orthogonal frequency division multiplexing (OFDM) system comprising:
performing network entry via a first base station; receiving system information via a unicast message from the first base station for at least one other base station, wherein the system information includes a preamble index for each of the at least one other base station, and each of the at least one other base station belongs to an active set of the UE; measuring, at the UE, a signal strength of a signal of each of the at least one other base station, the measurement based on the received system information, wherein the signal strength is measured using a plurality of OFDM pilot tones, wherein the plurality of OFDM pilot tones are arranged in a scattered pattern in time and frequency; determining, at the UE, whether the signal strength for each of the at least one other base stations exceeds a pre-defined pilot tone signal strength threshold; and reporting, from the UE to the first base station, the signal strength corresponding to the base stations determined to exceed the pre-defined pilot tone signal strength threshold.