Granted Patent B2

US 9,386,499 · App. 13/578,869 · Granted Jul 5, 2016

Inventors: Michael Ohm (Stuttgart, DE); Michael Schmidt (Stuttgart, DE); Thorsten Wild (Stuttgart, DE)

Assignee: Alcatel Lucent

H04W36/32H04W36/08

Abstract

Claims (32)

1. A method for communicating in a wireless communication network, the wireless communication network comprising a plurality of base stations and at least one mobile communication unit, wherein the mobile communication unit is moving at speeds above the limit that is allowable in LTE standard, the mobile communication unit comprising a transceiver component, a first Doppler compensation component, and a measurement component, wherein the first Doppler compensation component is adapted to compensate the Doppler shift of signals being exchanged between a base station of the plurality of base stations and the transceiver component, wherein the method comprises:

exchanging data between the transceiver component and a first base station of the plurality of base stations, wherein the first Doppler compensation component compensates the Doppler shift of signals carrying the data by using a first Doppler compensation value;

initiating a measurement by transmitting a first signal from the transceiver component to the measurement component;

transmitting a second signal from the measurement component to the transceiver component, the second signal being indicative of measurement values being related to at least one second base station of the plurality of base stations;

transmitting a measurement report from the transceiver component to the first base station, the measurement report comprising the measurement values of the measurement;

determining if a handover procedure from the first base station to a target base station of the at least one second base station is initiated by the first base station;

transmitting a third signal from the first base station to the transceiver component, if the first base station has determined to perform the handover procedure to the target base station, the third signal being indicative of initiating the handover procedure;

transmitting a fourth signal from the transceiver component to the measurement component, the fourth signal being indicative of the target base station, if the first base station has determined to perform the handover procedure to the target base station;

transmitting a fifth signal from the measurement component to the first Doppler compensation component, the fifth signal being indicative of changing the first Doppler compensation value to a second Doppler compensation value, the second Doppler compensation value being adapted to compensate the Doppler shift of signals being exchanged between the transceiver component and the target base station, if the first base station has determined to perform the handover procedure to the target base station; and

performing a handover procedure if the first base station has determined to perform a handover procedure to the target base station.

2. Method according to claim 1 , wherein the measurement component calculates the measurement values of the measurement report based on location data of the mobile communication unit, the movement direction and speed of the mobile communication unit, location data of the plurality of base stations, and/or the radiation direction of antennas of the plurality of base stations.

3. Method according to claim 2 , wherein the measurement component calculates the measurement values based on an expected timing advance and/or on expected path losses of signals being exchanged between the transceiver component and the at least one second base station and/or on expected signal-to-noise ratio of signals being exchanged between the transceiver component and the at least one second base station or based on a combination thereof.

4. Method according to claim 1 , wherein the measurement component comprises a receiver component and a second Doppler compensation component, the receiver component receiving at least one signal from the at least one second base station, wherein the measurement component measures signal strength and signal quality of the at least one signal from the at least one second base station, and wherein the measurement report comprises the signal strength and the signal quality of the at least one signal.

5. A mobile communication unit comprising a transceiver component, a first Doppler compensation component, and a measurement component, wherein the first Doppler compensation component is adapted to compensate the Doppler shift of signals being received from a base station by using a first Doppler compensation value, wherein the measurement component comprises first signal receiving means for receiving signals from the transceiver component, wherein the transceiver component comprises second signal receiving means for receiving signals from the measurement component, and wherein the Doppler compensation component comprises third signal receiving means for receiving signals from the measurement component, wherein the mobile communication unit is adapted for being moved at speeds above the limit that is allowable in LTE standard,

the transceiver component comprising data transmission means and data receiving means for exchanging data between the transceiver component and a source base station;

the transceiver component further comprising first signal transmission means for initiating a measurement by transmitting a first signal from the transceiver component to the measurement component;

the measurement component comprising second signal transmission means for transmitting a second signal from the measurement component to the transceiver component, the second signal being indicative of measurement values being related to at least one second base station;

the transceiver component comprising measurement report transmission means for transmitting a measurement report from the transceiver component to the source base station, the measurement report comprising the measurement values;

the transceiver component further comprising third signal transmission means for transmitting a fourth signal from the transceiver component to the measurement component, the fourth signal being indicative of a target base station; and

the measurement component comprising fourth signal transmission means for transmitting a fifth signal from the measurement component to the first Doppler compensation component, the fifth signal being indicative of changing the first Doppler compensation value to a second Doppler compensation value, the second Doppler compensation value being adapted to compensate the Doppler shift of signals being exchanged between the transceiver component and a target base station.

6. Mobile communication unit according to claim 5 , wherein the mobile communication unit further comprises a data storage, a database being stored in the data storage, the database comprising location data of the plurality of base stations and/or a plurality of radiation directions of antennas of the plurality of base stations, wherein the measurement component comprises location data receiving means for receiving location data from a location system and first calculation means for calculating the measurement values of the measurement report based on the location data and the location data of the plurality of base stations, and/or the plurality of radiation directions of the antennas of the plurality of base stations.

7. Mobile communication unit according to claim 5 , wherein the measurement component further comprises a receiver component and a second Doppler compensation component, the second Doppler compensation component is adapted for compensating the Doppler shift of signals being received by the receiver component, wherein the receiver component comprises fifth signal receiving means for receiving at least one signal from at least one second base station, wherein the measurement component comprises measurement means for measuring signal strength and signal quality of the at least one signal from the at least one second base station, and wherein the measurement report comprises the signal strength and the signal quality of the at least one second signal.

8. A mobile communication system comprising a mobile communication unit of claim 5 and a plurality of base stations.

9. A non-transitory computer-readable storage medium containing instructions that when executed by a mobile communication unit cause the mobile communication unit to perform a method for communicating with a plurality of base stations of a wireless communication network, wherein the mobile communication unit is adapted for being moved at speeds above the limit that is allowable in LTE standard, the method comprising:

exchanging data between the transceiver component and a source base station of the plurality of base stations, wherein the first Doppler compensation component compensates the Doppler shift of signals carrying the data by using a first Doppler compensation value;

initiating a measurement by transmitting a first signal from the transceiver component to the measurement component;

transmitting a second signal from the measurement component to the transceiver component, the second signal being indicative of measurement values being related to at least one second base station of the plurality of base stations;

transmitting a measurement report from the transceiver component to the source base station, the measurement report comprising the measurement values;

receiving a third signal from the source base station by the transceiver component, the third signal being indicative of initiating a handover procedure to a target base station;

transmitting a fourth signal from the transceiver component to the measurement component, the fourth signal being indicative of the target base station;

transmitting a fifth signal from the measurement component to the first Doppler compensation component, the fifth signal being indicative of changing the first Doppler compensation value to a second Doppler compensation value, the second Doppler compensation value being adapted to compensate the Doppler shift of signals being exchanged between the transceiver component and the target base station; and

performing a handover procedure from the source base station to the target base station.

Assignments (13)

Priority Claims (1)

Continuity (1)