User equipment and access method thereof
First Claim
1. A method for a user equipment (UE) to access a wireless network, wherein the wireless network comprises a plurality of access points and the UE is in communication with a serving access point, the method comprising:
- measuring a Doppler frequency shift of a signal sent by each of the plurality of access points to obtain a relative speed between the UE and the each of the plurality of access points according to the Doppler frequency shift;
measuring a signal intensity of each of the plurality of access points;
when the relative speed between the UE and the serving access point is greater than a threshold speed, determining whether there is at least one non-serving access point the relative speed between which and the UE is smaller than or equal to the threshold speed; and
if there are one or more non-serving access points the relative speed between which and the UE is smaller than or equal to the threshold speed, and one non-serving access point having a maximum signal intensity is selected among the one or more non-serving access points for the serving access point to hand over the UE to, establishing a communication connection between the UE and the selected non-serving access point.
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Accused Products
Abstract
In the field of wireless network communications, in order to solve a problem in the prior art that a user equipment (UE) cannot be handed over in time between a mobile access point (AP) and a fixed access point, a UE and an access method thereof are provided. The method includes the following steps. A relative speed between a UE and each access point is calculated. The access point is selected to establish a communication connection if the relative speed between the UE and the access point is smaller than a threshold speed. Therefore, a beneficial effect that the UE can be handed over in time between the mobile access point and the fixed access point is achieved.
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Citations
14 Claims
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1. A method for a user equipment (UE) to access a wireless network, wherein the wireless network comprises a plurality of access points and the UE is in communication with a serving access point, the method comprising:
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measuring a Doppler frequency shift of a signal sent by each of the plurality of access points to obtain a relative speed between the UE and the each of the plurality of access points according to the Doppler frequency shift; measuring a signal intensity of each of the plurality of access points; when the relative speed between the UE and the serving access point is greater than a threshold speed, determining whether there is at least one non-serving access point the relative speed between which and the UE is smaller than or equal to the threshold speed; and if there are one or more non-serving access points the relative speed between which and the UE is smaller than or equal to the threshold speed, and one non-serving access point having a maximum signal intensity is selected among the one or more non-serving access points for the serving access point to hand over the UE to, establishing a communication connection between the UE and the selected non-serving access point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A user equipment (UE), wherein the UE is in communication with a serving access point of a wireless network, and the wireless network comprises a plurality of access points, the UE comprising:
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a measuring unit, configured to measure a Doppler frequency shift of a signal sent by each of the plurality of access points to obtain a relative speed between the UE and the each of the plurality of access points according to the Doppler frequency shift and configured to measure a signal intensity of each of the plurality of access points; and an access unit, configured to, when the relative speed between the UE and the serving access point is greater than a threshold speed, determine whether there is at least one non-serving access point the relative speed between which and the UE is smaller than or equal to the threshold speed; and
if there are one or more non-serving access points the relative speed between which and the UE is smaller than or equal to the threshold speed, and one non-serving access point having a maximum signal intensity is selected among the one or more non-serving access points for the serving access point to hand over the UE to, establish a communication connection between the UE and the selected non-serving access point. - View Dependent Claims (11, 12)
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13. A computer program product comprising a computer readable non-transitory storage medium storing program code thereon for use by a user equipment (UE), wherein the UE is in communication with a serving access point of a wireless network, and the wireless network comprises a plurality of access points, the program code comprising:
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instructions for measuring a Doppler frequency shift of a signal sent by each of the plurality of access points to obtain a relative speed between the UE and the each of the plurality of access points according to the Doppler frequency shift; instructions for measuring a signal intensity of each of the plurality of access points; instructions for determining, when the relative speed between the UE and the serving access point is greater than a threshold speed, whether there is at least one non-serving access point the relative speed between which and the UE is smaller than or equal to the threshold speed; and instructions for establishing a communication connection between the UE and a selected non-serving access point, if there are one or more non-serving access points the relative speed between which and the UE is smaller than or equal to the threshold speed and one non-serving access point having a maximum signal intensity is selected among the one or more non-serving access points for the serving access point to hand over the UE to. - View Dependent Claims (14)
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Specification