US 10,219,194 B2 · Inter-small cell handover method, device, and system

Abstract

The present application relates to the field of communications technologies, and provides an inter-small cell handover method, a device, and a system. When UE is in a coverage hole of a serving small cell, the UE needs to perform synchronous measurement only on each available beam pair in a set of available small cells determined by the UE, thereby reducing a delay of re-accessing a high frequency network by the UE, and improving QoS of receiving a high frequency service by the UE. the present application includes: performing, by UE, synchronous measurement, to determine a set of small cells available for the UE; sending the set of available small cells to a macro base station; when the UE is in a coverage hole of a current serving small cell, receiving, by the UE, a first synchronization indication sent by the macro base station.

Claims22

Dependent claims

An inter-small cell handover method, comprising:

performing, by a user equipment (UE), synchronous measurement, to determine a set of available small cells that are available for the UE, wherein the set of available small cells comprises at least one available small cell, wherein an available beam pair of each available small cell includes a high frequency beam of the UE and a high frequency beam of the available small cell;
sending, by the UE, the set of available small cells to a macro base station;
when the UE is in a coverage hole of a current serving small cell, receiving a first synchronization indication sent by the macro base station, wherein the first synchronization indication instructs the UE to perform synchronous measurement on the high frequency beam of the UE in each available beam pair;
performing, by the UE, synchronous measurement according to the first synchronization indication, to select an available target beam pair;
and
handing over, by the UE, to a target small cell corresponding to the available target beam pair.

3 more elements

An inter-small cell handover method, comprising:

receiving, by a macro base station from a user equipment (UE), a set of available small cells that are available for the UE, wherein the set of available small cells comprises at least one available small cell, wherein an available beam pair of each available small cell includes a high frequency beam of the UE and a high frequency beam of the available small cell;
receiving, by the macro base station, a coverage hole status indication sent by a current serving small cell of the UE, wherein the coverage hole status indication indicates whether the UE is in a coverage hole of the current serving small cell;
and
when the UE is in the coverage hole of the current serving small cell, sending, by the macro base station, a first synchronization indication to the UE, and separately sending a second synchronization indication to each available small cell in the set of available small cells, so that the UE performs synchronous measurement according to the first synchronization indication, selects an available target beam pair, and hands over from the current serving small cell of the UE to a target small cell corresponding to the available target beam pair, wherein the first synchronization indication instructs the UE to perform synchronous measurement on the high frequency beam of the UE in each available beam pair, and the second synchronization indication instructs the available small cell to send a synchronization pilot signal to the UE on the high frequency beam in the available beam pair of the available small cell.

1 more element

An inter-small cell handover method, comprising:

sending a first synchronization pilot signal to a user equipment (UE), by an available small cell, so that the UE measures the synchronization pilot signal, and determines an available small cell of the UE and an available beam pair of the available small cell, wherein the available beam pair includes a high frequency beam of the available small cell and a high frequency beam of the UE;
receiving, by the available small cell, a synchronization indication sent by a macro base station, wherein the synchronization indication instructs the available small cell to send a synchronization pilot signal to the UE on the high frequency beam in the available beam pair of the available small cell;
sending, by the available small cell, a second synchronization pilot signal to the UE according to the synchronization indication, so that the UE performs synchronous measurement on the high frequency beam of the UE in the available beam pair, determines an available target beam pair, and hands over from a current serving small cell of the UE to a target small cell corresponding to the available target beam pair;
and
receiving, by the available small cell, a data transmission indication sent by the macro base station, to perform data transmission with the UE by using the available target beam pair.

2 more elements

A user equipment (UE), comprising:

a memory storing instructions;
and
a processor configured to execute the instruction to cause the UE to:
perform synchronous measurement, to determine a set of available small cells that are available for the UE, wherein the set of available small cells comprises at least one available small cell, wherein an available beam pair of each available small cell includes a high frequency beam of the UE and a high frequency beam of the available small cell;
send the set of available small cells to a macro base station;
when the UE is in a coverage hole of a current serving small cell, receive a first synchronization indication sent by the macro base station, wherein the first synchronization indication instructs the UE to perform synchronous measurement on the high frequency beam of the UE in each available beam pair;
perform synchronous measurement according to the first synchronization indication, to select an available target beam pair;
and
hand over to a target small cell corresponding to the available target beam pair.

6 more elements

A macro base station, comprising:

a memory storing instructions;
and
a processor configured to execute the instruction to cause the macro base station to:
receive a set of available small cells sent by a user equipment (UE), wherein the set of available small cells comprises at least one available small cell, and an available beam pair of each available small cell includes a high frequency beam of the UE and a high frequency beam of the available small cell;
and
receive a coverage hole status indication sent by a serving small cell of the UE, wherein the coverage hole status indication indicates whether the UE is in a coverage hole of the serving small cell;
and
when the UE is in the coverage hole of the current serving small cell, send a first synchronization indication to the UE, and separately send a second synchronization indication to each available small cell in the set of available small cells, so that the UE performs synchronous measurement according to the first synchronization indication, selects an available target beam pair, and hands over from the current serving small cell of the UE to a target small cell corresponding to the available target beam pair, wherein the first synchronization indication instructs the UE to perform synchronous measurement on the high frequency beam of the UE in each available beam pair, and the second synchronization indication instructs the available small cell to send a synchronization pilot signal to the UE on the high frequency beam in the available beam pair of the available small cell.

5 more elements

A small cell, comprising:

a memory storing instructions;
and
a processor configured to execute the instruction to cause the small cell to:
send a first synchronization pilot signal to a user equipment (UE), so that the UE measures the synchronization pilot signal, and determines an available small cell of the UE and an available beam pair of the available small cell, wherein the available beam pair consists of a high frequency beam of the available small cell and a high frequency beam of the UE;
receive a synchronization indication sent by a macro base station, wherein the synchronization indication instructs the available small cell to send a synchronization pilot signal to the UE on the high frequency beam in the available beam pair of the available small cell, wherein
send a second synchronization pilot signal to the UE according to the synchronization indication, so that the UE performs synchronous measurement on the high frequency beam of the UE in the available beam pair, determines an available target beam pair, and hands over from a current serving small cell of the UE to a target small cell corresponding to the available target beam pair;
and
receive a data transmission indication sent by the macro base station;
and
perform data transmission with the UE by using the available target beam pair.

7 more elements

Dependencies are inferred from the claim text.

Inter-small cell handover method, device, and system

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Inter-small cell handover method, device, and system

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Abstract

Claims22