CN110177386B

CN110177386B - Cell switching method, user equipment and base station

Info

Publication number: CN110177386B
Application number: CN201910045669.5A
Authority: CN
Inventors: 刘建琴; 吴强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-04-29
Filing date: 2014-04-29
Publication date: 2022-03-25
Anticipated expiration: 2034-04-29
Also published as: CN110177386A; CN105340324B; CN105340324A; WO2015165052A1

Abstract

The embodiment of the invention provides a cell switching method, user equipment and a base station. The cell switching method of the invention comprises the following steps: receiving reference signal resources sent by at least one target cell base station; the reference signal resource includes: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information; measuring the channel quality of the at least one target cell according to the reference signal resource to obtain a measurement result and an identifier of the reference signal resource corresponding to the measurement result; and sending the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station. The embodiment of the invention can ensure that the UE can be in the coverage range of the common channel after switching.

Description

Cell switching method, user equipment and base station

Technical Field

The present invention relates to communications technologies, and in particular, to a cell switching method, a user equipment, and a base station.

Background

Multiple Input Multiple Output (MIMO) antenna technology has been widely used in wireless communication systems to increase system capacity and ensure coverage of cells. For example, in the downlink of the LTE system, transmit diversity based on multiple antennas, open-loop/closed-loop spatial multiplexing, and multi-stream transmission based on Demodulation Reference Signal (DM-RS) are used. At present, in the DM-RS-based multi-stream transmission, two-dimensional beamforming is adopted, that is, all transmitting antennas are horizontally placed, and only beams in the horizontal direction can be generated. In order to improve the utilization rate of resources and the coverage area of a cell and improve the performance of a multi-antenna system, the configuration of a two-dimensional antenna is introduced into the LTE Rel-12 standard, namely, the antenna is placed in the horizontal direction and the vertical direction at the same time, so that beam forming in the horizontal direction and the vertical direction, namely three-dimensional beam forming, can be simultaneously generated.

A cell where (User Equipment, UE for short) currently keeps connected communication is a serving cell, a cell to which the UE may be handed over from the serving cell is called a target cell, and the UE has at least one target cell. Before the UE performs cell switching, the channel quality of the target cells needs to be measured, and cell switching is performed according to the measurement result. The UE measures channel quality according to a Reference Signal (RS) corresponding to each of the target cells. Wherein one reference signal corresponds to one downtilt angle.

In the prior art, when channel quality measurement is performed on a target cell of a UE according to the reference signal, measurement is actually performed only on the reference signal specific to the UE and a corresponding downtilt angle, without considering a coverage area of a common channel of the target cell. Therefore, it may happen that the UE cannot cover the common channel of a target cell after being handed over to the target cell based on the channel quality measurement result of the reference signal.

Disclosure of Invention

The embodiment of the invention provides a cell switching method, user equipment and a base station, which aim to solve the problem that the coverage of a common channel of a target cell is difficult to guarantee after cell switching in the prior art.

In a first aspect, an embodiment of the present invention provides a cell handover method, including:

receiving reference signal resources sent by at least one target cell base station; wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

measuring the channel quality of the at least one target cell according to the reference signal resource to obtain a measurement result and an identifier of the reference signal resource corresponding to the measurement result;

and sending the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station, so that the serving cell base station determines whether the UE performs cell switching according to the measurement result, if so, the serving cell base station sends a switching request message to the at least one target cell base station, and performs cell switching on the UE according to a switching request response message returned by the at least one target cell base station.

According to the first aspect, in a first possible implementation manner of the first aspect, before the receiving reference signal resources transmitted by at least one target cell base station, the method further includes:

receiving the number of the reference signal resources of each target cell and the configuration information corresponding to each set of reference signal resources, which are sent by the serving cell base station; wherein each set of reference signal resources corresponds to a configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

According to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the receiving reference signal resources transmitted by at least one target cell base station includes:

and receiving the at least two sets of reference signal resources sent by the at least one target cell base station in a time division manner.

According to a second possible implementation manner of the first aspect, in a third possible implementation manner, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

the measuring the channel quality of the at least one target cell according to the reference signal resources comprises:

and measuring the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

According to a third possible implementation manner of the first aspect, in a fourth possible implementation manner, before the sending the obtained measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, the method further includes:

and performing time domain filtering on the measurement result to update the measurement result.

In a fifth possible implementation form, according to any one of the first to fourth possible implementation forms of the first aspect, the method further includes:

receiving a reference signal resource corresponding to the serving cell sent by the serving cell base station; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, wherein each set of reference signal resources corresponds to one piece of precoding information;

correspondingly, before the sending the obtained measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, the method further includes:

and measuring the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell to obtain the measurement result of the serving cell.

According to a fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

According to a sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of cell-specific reference signal resources;

measuring the channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell;

the measuring the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell includes:

and measuring the channel quality of the serving cell according to the at least one set of cell specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell.

According to a sixth possible implementation manner of the first aspect, in an eighth possible implementation manner, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of user specific reference signal resources;

measuring the channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell respectively to obtain a second measurement result of the at least one target cell;

and measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell to obtain a second measurement result of the serving cell.

According to a seventh possible implementation manner of the first aspect, in a ninth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell further includes: at least one set of user specific reference signal resources;

the measuring the channel quality of the at least one target cell according to the reference signal resources further comprises:

the measuring the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell further includes:

According to a ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the sending the obtained measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station includes:

and sending the measurement result to the serving cell base station according to a preset event trigger condition.

In a tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner, the preset event triggering condition includes: a same system event trigger condition or a different system event trigger condition.

In an eleventh possible implementation manner of the first aspect, in a twelfth possible implementation manner, the system-on-event triggering condition includes any one of the following:

a first event triggering condition that a first measurement result of the serving cell is greater than or equal to a first preset threshold and a second measurement result of the serving cell is greater than or equal to a second preset threshold;

a second event triggering condition, which is that a first measurement result of the serving cell is smaller than the first preset threshold, or a second measurement result of the serving cell is smaller than the second preset threshold;

a third event triggering condition that the first measurement result of the at least one target cell is greater than or equal to the first measurement result of the serving cell and is greater than or equal to the first preset threshold; a second measurement result of the serving cell is greater than or equal to the second preset threshold;

a fourth event triggering condition that the first measurement result of the at least one target cell is greater than or equal to the first preset threshold, and the second measurement result of the at least one target cell is greater than or equal to the second preset threshold;

a fifth event triggering condition that the first measurement result of the at least one target cell is greater than or equal to the first preset threshold, and the second measurement result of the at least one target cell is greater than or equal to the second preset threshold; the first measurement result of the serving cell is smaller than a third preset threshold, and the second measurement result of the serving cell is smaller than a fourth preset threshold.

In a thirteenth possible implementation manner, according to the twelfth possible implementation manner of the first aspect, the inter-system event triggering condition includes any one of the following:

a sixth event triggering condition that the first measurement result of the at least one target cell is greater than or equal to the first measurement result of the serving cell and greater than or equal to the first preset threshold, and the second measurement result of the serving cell is greater than or equal to the second preset threshold;

a seventh event triggering condition is that the first measurement result of the at least one target cell is greater than or equal to the first preset threshold, and the second measurement result of the serving cell is greater than or equal to the second preset threshold.

In a second aspect, an embodiment of the present invention further provides a cell handover method, including:

receiving a measurement result sent by UE and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resources include: each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

determining whether the UE performs cell switching according to the measurement result, and if so, sending a switching request message to the at least one target cell base station;

and performing cell switching on the UE according to the switching request response message returned by the at least one target cell base station.

According to the second aspect, in a first possible implementation manner of the second aspect, before the receiving the measurement result sent by the UE and the identifier of the reference signal resource corresponding to the measurement result, the method further includes:

notifying the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources to the UE, so that the UE receives the reference signal resources corresponding to each target cell according to the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources; wherein, the configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

In a second possible implementation form, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

the measurement results include: and the UE measures the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

In a third possible implementation manner, according to the second possible implementation manner of the second aspect, the measurement result is a result after the UE performs time domain filtering.

In a fourth possible implementation form of the method according to any one of the second to third possible implementation forms of the second aspect, the method further comprises:

sending a reference signal resource corresponding to a serving cell to the UE; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to one precoding information;

correspondingly, the measurement result further includes: and the UE measures the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell.

According to a fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the determining whether the UE performs cell handover according to the measurement result includes:

respectively judging the channel quality of the at least one target cell and the channel quality of the serving cell according to the measurement result;

if the channel quality of the at least one target cell is greater than the channel quality of the serving cell, determining that the UE performs cell switching; or,

and if the difference value between the channel quality of the at least one target cell and the channel quality of the serving cell is greater than a preset threshold value, determining that the UE performs cell switching.

In a sixth possible implementation manner, the sending a handover request message to the at least one target cell base station includes:

sending the handover request message to the at least one target cell base station over an X2 air interface;

correspondingly, the handover request response message is a message sent by the at least one target cell base station over the air interface of X2.

In a seventh possible implementation manner of the second aspect, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal indicator strength RSSI information.

In an eighth possible implementation manner, according to the seventh possible implementation manner of the second aspect, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of cell-specific reference signal resources;

correspondingly, the measurement result comprises: a first measurement result of the at least one target cell and a first measurement result of the serving cell; wherein, the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell-specific reference signal resources corresponding to each target cell; the first measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of cell-specific reference signal resources corresponding to the serving cell.

In a ninth possible implementation manner, according to the seventh possible implementation manner of the second aspect, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of user specific reference signal resources;

correspondingly, the measurement result comprises: a second measurement result of the at least one target cell and a second measurement result of the serving cell; wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; and the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to the serving cell.

In an eighth possible implementation manner of the second aspect, in a tenth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell further includes: at least one set of user specific reference signal resources;

correspondingly, the measurement result further includes: a second measurement result of the at least one target cell and a second measurement result of the serving cell; wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; and the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to the serving cell.

In a tenth possible implementation manner of the second aspect, in an eleventh possible implementation manner, the measurement result is sent by the UE according to a preset event trigger condition.

In a third aspect, an embodiment of the present invention further provides a cell handover method, including:

receiving a switching request message sent by a serving cell base station; wherein the handover request message includes: requesting the switched UE, the measurement result and the identifier of the reference signal resource corresponding to the measurement result; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resources include: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

determining whether the UE performs cell switching according to the measurement result;

and sending a switching request response message to the serving cell base station so that the serving cell base station performs cell switching on the UE according to the switching request response message.

According to the third aspect, in a first possible implementation manner of the third aspect, the determining whether the UE performs cell handover according to the measurement result includes:

determining precoding information after the UE is switched or a reference signal resource identifier corresponding to the precoding information according to the identifier of the reference signal resource corresponding to the measurement result, the self channel quality measurement result and the identifier of the corresponding reference signal resource;

the sending of the handover request response message to the serving cell base station includes:

and sending the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the precoding information or the reference signal resource identifier corresponding to the precoding information.

According to the first possible implementation manner of the third aspect, in a second possible implementation manner, the handover request message is a message sent by the serving cell base station over an X2 air interface;

the sending the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message includes:

and sending the precoding information or the reference signal resource identifier corresponding to the precoding information carried in the handover request response message to the serving cell base station through the X2 air interface.

According to the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

According to any one of the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner, the reference signal resource corresponding to each target cell includes: at least one set of cell-specific reference signal resources;

correspondingly, the measurement result comprises: a first measurement result of the at least one target cell; the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell specific reference signal resources corresponding to each target cell.

According to any one of the first to third possible implementation manners of the third aspect, in a fifth possible implementation manner, the reference signal resource corresponding to each target cell includes: at least one set of user specific reference signal resources;

correspondingly, the measurement result comprises: a second measurement result of the at least one target cell; the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user-specific reference signal resources corresponding to each target cell.

According to a fourth possible implementation manner of the third aspect, in a sixth possible implementation manner, the reference signal resource corresponding to each target cell further includes: at least one set of user specific reference signal resources;

correspondingly, the measurement result further includes: a second measurement result of the at least one target cell; the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user-specific reference signal resources corresponding to each target cell.

According to a sixth possible implementation manner of the third aspect, in a seventh possible implementation manner, the determining precoding information switched by the UE or a reference signal resource identifier corresponding to the precoding information according to the reference signal resource identifier corresponding to the measurement result, the result of the channel measurement of the UE and the corresponding reference signal resource identifier includes:

determining first precoding information after the UE is switched or a reference signal resource identifier corresponding to the first precoding information according to the reference signal resource identifier corresponding to the first measurement result, the self channel quality result and the corresponding reference signal resource identifier;

determining second pre-coding information after the UE is switched or a reference signal resource identifier corresponding to the second pre-coding information according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier;

the sending the precoding information to the serving cell base station through the handover response message includes:

and sending the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the first precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information.

In a fourth aspect, an embodiment of the present invention provides a UE, including:

a receiving module, configured to receive a reference signal resource sent by at least one target cell base station; wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

a measurement module, configured to measure channel quality of the at least one target cell according to the reference signal resource, and obtain a measurement result and an identifier of the reference signal resource corresponding to the measurement result;

and a sending module, configured to send the measurement result and an identifier of the reference signal resource corresponding to the measurement result to a serving cell base station, so that the serving cell base station determines whether the UE performs cell handover according to the measurement result, and if so, the serving cell base station sends a handover request message to the at least one target cell base station, and performs cell handover on the UE according to a handover request response message returned by the at least one target cell base station.

According to a fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving module is further configured to receive, before receiving the reference signal resource sent by the at least one target cell base station, the number of reference signal resources of each target cell and configuration information corresponding to each set of reference signal resources, where the number of reference signal resources of each target cell and the configuration information are sent by the serving cell base station; wherein each set of reference signal resources corresponds to a configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

According to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the receiving module is further configured to receive the at least two sets of reference signal resources that are sent by the at least one target cell base station in a time division manner.

According to a second possible implementation manner of the fourth aspect, in a third possible implementation manner, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

the measurement module is further configured to measure the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

According to a third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the UE further includes:

and a filtering module, configured to perform time-domain filtering on the measurement result before the sending module sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to update the measurement result.

According to any one of the fourth possible implementation manners of the fourth aspect to the fourth aspect, in a fifth possible implementation manner, the receiving module is further configured to receive a reference signal resource corresponding to the serving cell, where the reference signal resource is sent by the serving cell base station; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, wherein each set of reference signal resources corresponds to one piece of precoding information;

correspondingly, the measurement module is further configured to measure the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell before the sending module sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to obtain the measurement result of the serving cell.

In a sixth possible implementation manner of the fourth aspect, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

According to a sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of cell-specific reference signal resources;

the measurement module is further configured to measure the channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of cell specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell.

In a sixth possible implementation manner of the fourth aspect, in an eighth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of user specific reference signal resources;

the measurement module is further configured to measure the channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell to obtain a second measurement result of the serving cell.

In a ninth possible implementation manner, according to the seventh possible implementation manner of the fourth aspect, the reference signal resource corresponding to each target cell and the serving cell further includes: at least one set of user specific reference signal resources;

According to a ninth possible implementation manner of the fourth aspect, in a tenth possible implementation manner, the sending module is further configured to send the measurement result to the serving cell base station according to a preset event trigger condition.

In a fifth aspect, an embodiment of the present invention further provides a base station, including:

a receiving module, configured to receive a measurement result sent by a UE and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resources include: each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

a judging module, configured to determine whether the UE performs cell switching according to the measurement result;

a sending module, configured to send a handover request message to the at least one target cell base station if it is determined that the UE performs cell handover according to the measurement result;

and the switching module is used for carrying out cell switching on the UE according to the switching request response message returned by the at least one target cell base station.

According to a fifth aspect, in a first possible implementation manner of the fifth aspect, the sending module is further configured to notify the number of reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources to the UE before the receiving module receives the measurement result sent by the UE and the identifier of the reference signal resource corresponding to the measurement result, so that the UE receives the reference signal resource corresponding to each target cell according to the number of reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources; wherein, the configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

In a second possible implementation form of the method according to the fifth aspect or the first possible implementation form of the fifth aspect, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

In a third possible implementation manner, according to the second possible implementation manner of the fifth aspect, the measurement result is a result after the UE performs time domain filtering.

According to any one of the fifth aspect to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the sending module is further configured to send a reference signal resource corresponding to a serving cell to the UE; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to one precoding information;

According to a fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the determining module is further configured to determine, according to the measurement result, the channel quality of the at least one target cell and the channel quality of the serving cell respectively; if the channel quality of the at least one target cell is greater than the channel quality of the serving cell, determining that the UE performs cell switching; or, if the difference between the channel quality of the at least one target cell and the channel quality of the serving cell is greater than a preset threshold, determining that the UE performs cell switching.

According to any one of the fifth aspect to the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner, the sending module is further configured to send the handover request message to the at least one target cell base station over an X2 air interface;

correspondingly, the handover request message is a message sent by the at least one target cell base station over the air interface of X2.

In a seventh possible implementation manner of the fifth aspect, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal indicator strength RSSI information.

In a seventh possible implementation manner of the fifth aspect, in an eighth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of cell-specific reference signal resources;

In a ninth possible implementation manner, according to the seventh possible implementation manner of the fifth aspect, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of user specific reference signal resources;

In an eighth possible implementation manner of the fifth aspect, in a tenth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell further includes: at least one set of user specific reference signal resources;

In a tenth possible implementation manner of the fifth aspect, in an eleventh possible implementation manner, the measurement result is sent by the UE according to a preset event trigger condition.

In a sixth aspect, an embodiment of the present invention further provides a base station, including:

a receiving module, configured to receive a handover request message sent by a serving cell base station; wherein the handover request message includes: UE requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resources include: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

a determining module, configured to determine, according to the measurement result, whether the UE performs cell handover;

a sending module, configured to send a handover request response message to the serving cell base station, so that the serving cell base station performs cell handover on the UE according to the handover request response message.

According to a sixth aspect, in a first possible implementation manner of the sixth aspect, the determining module is further configured to determine precoding information after the UE is switched or a reference signal resource identifier corresponding to the precoding information according to an identifier of a reference signal resource corresponding to the measurement result, a channel quality measurement result of the determining module, and an identifier of a corresponding reference signal resource;

the sending module is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the precoding information or the reference signal resource identifier corresponding to the precoding information.

According to the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the handover request message is a message sent by the serving cell base station over an X2 air interface;

the sending module is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the X2 air interface, where the reference signal resource identifier is carried in the handover request response message.

In a third possible implementation manner, according to the first or second possible implementation manner of the sixth aspect, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

In a fourth possible implementation manner, the reference signal resource corresponding to each target cell includes: at least one set of cell-specific reference signal resources;

In a fifth possible implementation manner, the reference signal resource corresponding to each target cell includes: at least one set of user specific reference signal resources;

According to a fourth possible implementation manner of the sixth aspect, in a sixth possible implementation manner, the reference signal resource corresponding to each target cell further includes: at least one set of user specific reference signal resources;

According to a sixth possible implementation manner of the sixth aspect, in a seventh possible implementation manner, the sending module is further configured to determine, according to a reference signal resource identifier corresponding to the first measurement result, the channel quality result of the sending module and the corresponding reference signal resource identifier, first precoding information after the UE is switched or a reference signal resource identifier corresponding to the first precoding information; determining second pre-coding information after the UE is switched or a reference signal resource identifier corresponding to the second pre-coding information according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier;

the sending module is further configured to send the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the first precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information.

In a seventh aspect, an embodiment of the present invention further provides a UE, including: a receiver, a processor and a transmitter;

the receiver is configured to receive a reference signal resource sent by at least one target cell base station; wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

the processor is configured to measure the channel quality of the at least one target cell according to the reference signal resource, and obtain a measurement result and an identifier of the reference signal resource corresponding to the measurement result;

the transmitter is configured to send the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station, so that the serving cell base station determines whether the UE performs cell handover according to the measurement result, and if so, the serving cell base station sends a handover request message to the at least one target cell base station, and performs cell handover on the UE according to a handover request response message returned by the at least one target cell base station.

According to the seventh aspect, in a first possible implementation manner, the receiver is further configured to receive, before receiving the reference signal resource sent by the at least one target cell base station, the number of reference signal resources of each target cell and configuration information corresponding to each set of reference signal resources, where the number of reference signal resources of each target cell is sent by the serving cell base station; wherein each set of reference signal resources corresponds to a configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

According to the seventh aspect or the first possible implementation manner of the seventh aspect, in a second possible implementation manner, the receiver is further configured to receive the at least two sets of reference signal resources that are sent by the at least one target cell base station in a time division manner.

According to a second possible implementation manner of the seventh aspect, in a third possible implementation manner, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

the processor is further configured to measure the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

According to a third possible implementation manner of the seventh aspect, in a fourth possible implementation manner, the processor is further configured to perform time-domain filtering on the measurement result before the transmitter transmits the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to update the measurement result.

According to any one of the seventh aspect to the fourth possible implementation manner of the seventh aspect, in a fifth possible implementation manner, the receiver is further configured to receive a reference signal resource corresponding to the serving cell, which is sent by the serving cell base station; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, wherein each set of reference signal resources corresponds to one piece of precoding information;

the processor is further configured to measure the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell before the transmitter transmits the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to obtain the measurement result of the serving cell.

According to a fifth possible implementation manner of the seventh aspect, in a sixth possible implementation manner, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

According to a sixth possible implementation manner of the seventh aspect, in a seventh possible implementation manner, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of cell-specific reference signal resources;

the processor is further configured to measure channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of cell specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell.

According to a sixth possible implementation manner of the seventh aspect, in an eighth possible implementation manner, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of user specific reference signal resources;

the processor is further configured to measure channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell to obtain a second measurement result of the serving cell.

According to a seventh possible implementation manner of the seventh aspect, in a ninth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell further includes: at least one set of user specific reference signal resources;

According to a ninth possible implementation manner of the seventh aspect, in a tenth possible implementation manner, the transmitter is further configured to send the measurement result to the serving cell base station according to a preset event trigger condition.

In an eighth aspect, an embodiment of the present invention further provides a base station, including: a receiver, a processor and a transmitter;

the receiver is configured to receive a measurement result sent by the UE and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resources include: each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

the processor is configured to determine whether the UE performs cell handover according to the measurement result;

the transmitter is configured to transmit a handover request message to the at least one target cell base station if it is determined that the UE performs cell handover according to the measurement result;

the processor is further configured to perform cell handover on the UE according to a handover request response message returned by the at least one target cell base station.

According to an eighth aspect, in a first possible implementation manner of the eighth aspect, the transmitter is further configured to notify, before the receiver receives a measurement result sent by a UE and an identifier of a reference signal resource corresponding to the measurement result, the number of reference signal resources of each target cell base station and configuration information corresponding to each set of reference signal resources to the UE, so that the UE receives the reference signal resource corresponding to each target cell according to the number of reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources; wherein, the configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

In a second possible implementation manner, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

In a third possible implementation manner, according to the second possible implementation manner of the eighth aspect, the measurement result is a result after the UE performs time domain filtering.

In a fourth possible implementation manner, the transmitter is further configured to transmit a reference signal resource corresponding to a serving cell to the UE; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to one precoding information;

According to a fourth possible implementation manner of the eighth aspect, in a fifth possible implementation manner, the processor is further configured to respectively determine, according to the measurement result, a channel quality of the at least one target cell and a channel quality of the serving cell; if the channel quality of the at least one target cell is greater than the channel quality of the serving cell, determining that the UE performs cell switching; or, if the difference between the channel quality of the at least one target cell and the channel quality of the serving cell is greater than a preset threshold, determining that the UE performs cell switching.

According to any one of the eighth aspect to the fifth possible implementation manner of the eighth aspect, in a sixth possible implementation manner, the transmitter is further configured to send the handover request message to the at least one target cell base station over an X2 air interface;

In a seventh possible implementation manner of the eighth aspect, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal indicator strength RSSI information.

According to a seventh possible implementation manner of the eighth aspect, in an eighth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of cell-specific reference signal resources;

In a ninth possible implementation manner, according to the seventh possible implementation manner of the eighth aspect, the reference signal resource corresponding to each target cell and the serving cell includes: at least one set of user specific reference signal resources;

In an eighth possible implementation manner of the eighth aspect, in a tenth possible implementation manner, the reference signal resource corresponding to each target cell and the serving cell further includes: at least one set of user specific reference signal resources;

In a tenth possible implementation manner of the eighth aspect, in an eleventh possible implementation manner, the measurement result is sent by the UE according to a preset event trigger condition.

In a ninth aspect, an embodiment of the present invention further provides a base station, including: a receiver, a processor and a transmitter;

the receiver is configured to receive a handover request message sent by a serving cell base station; wherein the handover request message includes: UE requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resources include: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

the transmitter is configured to send a handover request response message to the serving cell base station, so that the serving cell base station performs cell handover on the UE according to the handover request response message.

According to a ninth aspect, in a first possible implementation manner of the ninth aspect, the processor is further configured to determine precoding information after the UE is switched or a reference signal resource identifier corresponding to the precoding information according to an identifier of a reference signal resource corresponding to the measurement result, a channel quality measurement result of the processor, and an identifier of a corresponding reference signal resource;

the transmitter is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the precoding information or the reference signal resource identifier corresponding to the precoding information.

According to the first possible implementation manner of the ninth aspect, in a second possible implementation manner, the handover request message is a message sent by the serving cell base station over an X2 air interface;

the transmitter is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the X2 air interface, where the reference signal resource identifier is carried in the handover request response message.

In a third possible implementation manner, according to the first or second possible implementation manner of the ninth aspect, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

According to a fourth possible implementation manner of the ninth aspect, in a sixth possible implementation manner, the reference signal resource corresponding to each target cell further includes: at least one set of user specific reference signal resources;

According to a sixth possible implementation manner of the ninth aspect, in a seventh possible implementation manner, the processor is further configured to determine, according to a reference signal resource identifier corresponding to the first measurement result, the channel quality result of the UE and a corresponding reference signal resource identifier, first precoding information after the UE is switched or a reference signal resource identifier corresponding to the first precoding information; determining second pre-coding information after the UE is switched or a reference signal resource identifier corresponding to the second pre-coding information according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier;

the transmitter is further configured to send the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the first precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information.

In the cell switching method, the user equipment and the base station of the embodiments of the present invention, each set of reference signal resources corresponds to one precoding information, and each target cell corresponds to at least two sets of reference signal resources, and the measurement result obtained by measuring the channel quality of at least one target cell through multiple sets of reference signal resources of at least one target cell of the UE corresponding to different precoding information is used to determine whether the UE is switched or not according to the measurement result, and determine the precoding information after the UE is switched to the target cell, so that the UE can be within the coverage of the common channel of the target cell after being switched.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a cell handover method according to an embodiment of the present invention;

fig. 2 is a flowchart of a cell switching method according to a second embodiment of the present invention;

fig. 3 is a flowchart of a cell handover method according to a third embodiment of the present invention;

fig. 4 is a flowchart of another cell handover method according to a third embodiment of the present invention;

fig. 5 is a flowchart of a cell switching method according to a fourth embodiment of the present invention;

fig. 6 is a flowchart of a cell switching method according to a fifth embodiment of the present invention;

fig. 7 is a flowchart of a cell switching method according to a sixth embodiment of the present invention;

fig. 8 is a flowchart of a cell handover method according to a seventh embodiment of the present invention;

fig. 9 is a flowchart of a cell switching method according to an eighth embodiment of the present invention;

fig. 10 is a flowchart of a cell handover method according to a ninth embodiment of the present invention;

fig. 11 is a schematic structural diagram of a UE according to a tenth embodiment of the present invention;

fig. 12 is a schematic structural diagram of a base station according to an eleventh embodiment of the present invention;

fig. 13 is a schematic structural diagram of a base station according to a twelfth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a UE according to a thirteenth embodiment of the present invention;

fig. 15 is a schematic structural diagram of a base station according to a fourteenth embodiment of the present invention;

fig. 16 is a schematic structural diagram of a base station according to a fifteenth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Fig. 1 is a flowchart of a cell handover method according to an embodiment of the present invention. The method of the embodiment is suitable for the situation that the UE performs cell switching. For a UE to be cell handed over, the UE has one serving cell base station and at least one target cell base station. The target cell base station may be a base station in a neighbor cell list broadcasted by X2 port or configured by a network. The method is performed by a UE. As shown in fig. 1, the method of this embodiment specifically includes the following steps:

step 101, receiving reference signal resources sent by at least one target cell base station.

Wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information.

Each set of reference signal resources of each target cell may be different types of reference signal resources corresponding to different precoding information, or may be the same type of reference signal resources corresponding to different precoding information. Each set of reference signal resources corresponds to one precoding information, and one precoding information corresponds to a certain antenna beam coverage downtilt. The one precoding information may be specifically a precoding matrix. In the embodiment of the present invention, the transmitting antennas of the serving cell base station and the target cell base station may be two-dimensional antennas. In a system with two-dimensional antennas, each precoding information corresponds to a set of weighting factors for the antenna elements of each column of the two-dimensional antenna.

The serving cell base station may be a macro station or a micro station. If the serving cell base station is a macro station, and correspondingly, the target cell base station of the UE may be a micro station, then the cell switching method actually switches the UE from the macro cell served by the macro station to the micro cell served by the micro station.

Step 102, measuring the channel quality of the at least one target cell according to the reference signal resource, and obtaining a measurement result and an identifier of the reference signal resource corresponding to the measurement result.

The UE is provided with at least one target cell, each target cell is provided with at least two sets of reference signal resources, one set of reference signal resources corresponds to precoding information, and one piece of precoding information corresponds to a certain beam downtilt angle. And the UE measures the channel quality of the at least one target cell according to the reference signal resources, and measures the channel quality according to the coverage range of the dip angle corresponding to at least two pieces of precoding information in the coverage range of the common channel of each target cell by the reference signal resources of each target cell.

Step 103, sending the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so that the serving cell base station determines whether the UE performs cell switching according to the measurement result, and if so, the serving cell base station sends a switching request message to the at least one target cell base station, and performs cell switching on the UE according to a switching request response message returned by the at least one target cell base station.

Then, in the measurement results, one target cell corresponds to at least two sets of measurement results. The identifier of the reference signal resource corresponding to the measurement result indicates an identifier of a reference signal resource used for obtaining the measurement result, and the identifier of the reference signal resource may be an identifier of the reference signal resource in at least two sets of reference signal resources corresponding to a target cell. The identifier corresponds to a weighting factor used for precoding information, and may also correspond to precoding information. The identifier may be specifically represented by a number of a reference signal resource.

In the solution of this embodiment, the UE measures the channel quality of at least one target cell according to multiple sets of reference signal resources of the at least one target cell corresponding to different precoding information, and sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, and the serving cell base station determines whether the UE performs handover and precoding information of the UE that is handed over to the target cell according to the measurement result and the identifier of the reference signal resource corresponding to the measurement result. Each set of reference signal resource corresponds to one precoding information, one precoding information corresponds to a certain beam downtilt angle, and each target cell corresponds to at least two sets of reference signal resources, so that the cell switching is performed on the UE according to the reference signal resources by adopting the scheme of the embodiment, the beam switched by the UE can be in the coverage beam of the common channel of the target cell, and the coverage range of the common channel of the target cell after the cell switching of the UE can be improved.

Example two

The embodiment also provides a cell switching method. Fig. 2 is a flowchart of a cell switching method according to a second embodiment of the present invention. As shown in fig. 2, before receiving reference signal resources transmitted by at least one target cell base station in step 101 in the above embodiment, the method further includes:

step 201, receiving the number of the reference signal resources of each target cell and the configuration information corresponding to each set of reference signal resources sent by the serving cell base station.

Each set of reference signal resources corresponds to a configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

Specifically, the antenna port refers to a logical port for transmission, and there is no one-to-one correspondence relationship defined between the antenna port and a physical antenna. The antenna port is defined by a reference signal resource for the antenna. That is, the reference signal resource is the name of a logical port. It should be noted that, for different protocol versions, there may be different types of reference signal resources, and the different reference signal resources correspond to different antenna ports. For example: cell-specific Reference Signal (CRS) resources are transmitted on antenna ports {0}, {0,1} or {0,1,2,3 }; the user-specific Reference Signal (UE-specific Reference Signal, UE-RS) at least comprises two types of Demodulation Reference signals (DMRS) and CSI-RS (Channel State Information Reference Signal, CSI-RS), wherein DMRS resources are transmitted on antenna ports {5}, {7}, {8} or {7,8, …, v +6}, wherein v is the number of layers and is at most 8; channel State Information Reference Signal (CSI-RS) resources are transmitted on antenna ports 15,16,17,18, or 15,16,17, 18.

And the UE receives the configuration information corresponding to each set of reference signal resource, and respectively receives the reference signal resource according to the configuration information corresponding to each set of reference signal resource so as to measure the cell channel quality according to the different types of reference signal resources.

Further, the receiving, in step 101, the reference signal resource sent by the at least one target cell base station specifically includes:

step 202, receiving the at least two sets of reference signal resources sent by the at least one target cell base station in a time division manner.

Optionally, each radio subframe transmits a set of reference signal resources. When the number of the reference signal resources is two, a mode that the first set of reference signal resources and the second set of reference signal resources are alternately transmitted in every two adjacent subframes is adopted. Preferably, in the above scheme, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: the activated System Frame Number (SFN for short), subframe Number, measurement period, measurement interval, etc. are measured.

Specifically, each set of reference signal resources is transmitted according to a radio subframe. Here, the measurement configuration corresponding to each set of reference signal resources is actually configuration information required for the UE to measure each set of reference signal resources. The starting SFN of the measurement activation may be the SFN at which the UE starts to perform measurement after receiving the set of reference signal resources, i.e. the radio frame number. The subframe number is a subframe number of the SFN corresponding to when the measurement is started, that is, a specific subframe number at which the UE starts to perform the measurement.

Different reference signal resources of the same target cell have different measurement configurations. The UE respectively carries out channel quality measurement according to the configuration parameters corresponding to each set of reference signal resources, and can ensure that the measurement of each channel quality is based on the same reference signal resource number, thereby ensuring the accuracy of each measurement result. It should be noted that the measurement configuration may be stored in the UE side in advance, or may be issued to the UE by the serving cell base station.

In the above scheme, the step 102 of measuring the channel quality of the at least one target cell according to the reference signal resource specifically includes:

step 203, measuring the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

Further, before step 103 sends the obtained measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station in the above scheme, the method further includes:

and step 204, performing time domain filtering on the measurement result to update the measurement result.

Specifically, the UE performs time-domain filtering on the measurement result, so that the measurement result is more stable, and thus the measurement result is updated.

The temporal filtering is actually a temporal moving average filtering. The time-domain filtering may be performed on the measurement result of each set of reference signal resources, for example, the Layer 3(Layer 3, abbreviated as L3) filtering and the updating of the measurement result may be performed by using the following formula (1) for each set of reference signal resources according to the measurement timing parameter in the corresponding measurement configuration.

F_n＝(1-a_i)·F_n-1+a_i·M_n (1)

In the formula (1), F_nRepresenting the updated measurement result of this filtering, F_n-1Representing the last filtered measurement, M_nRepresenting the instantaneous measurement of this time, a_iAnd representing the filtering factor of the filtering.

It should be noted that, in this embodiment, a measurement time window may also be preset, in the measurement time window, the UE performs channel quality measurement according to at least two sets of reference signal resources of the at least one target cell, and outside the measurement time window, the UE performs channel quality measurement according to reference signal resources corresponding to precoding information updated after the at least one target cell is switched.

In the solution of this embodiment, on the basis of the above solution, each set of reference signal resources corresponds to one configuration information, and each configuration corresponds to one downtilt. Each set of reference signal resources is subjected to independent measurement configuration and time domain filtering, and based on the above, the embodiment enables all UEs to complete flexible adjustment and expansion of the cell coverage by selecting an optimal or better downtilt angle.

EXAMPLE III

The embodiment also provides a cell switching method. Fig. 3 is a flowchart of a cell switching method according to a third embodiment of the present invention. In the above embodiment, the method further includes:

step 301, receiving the reference signal resource corresponding to the serving cell sent by the serving cell base station.

The reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, each set of reference signal resources corresponding to one precoding information.

It should be noted that step 301 and step 101 have no absolute timing relationship, and may be executed in the same manner or sequentially.

Before the step 103 of the above scheme sends the obtained measurement result to the serving cell base station, the method further includes:

Preferably, the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Receiving Power (RSRP) information, Reference Signal Receiving Quality (RSRQ) information, and Received Signal Strength Indicator (RSSI) information.

Specifically, the measurement results include: the measurement result of the at least one target cell and the measurement result of the serving cell, that is, both the measurement result of the at least one target cell and the measurement result of the serving cell may be at least one of CQI information, RSRP information, RSRQ information, and RSSI information.

Further, in the above scheme, the reference signal resources corresponding to each target cell and the serving cell specifically include: at least one set of cell-specific reference signal resources.

Specifically, the cell-specific reference signal resource may be a CRS resource, and may also be other types of cell-specific reference signal resources.

As shown in fig. 3, the measuring the channel quality of the at least one target cell according to the reference signal resource in step 102 specifically includes:

step 302, measuring the channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell.

The measuring the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell specifically includes:

step 303, measuring the channel quality of the serving cell according to the at least one set of cell-specific reference signal resources corresponding to the serving cell, and obtaining a first measurement result of the serving cell.

The measurement result of the at least one target cell includes: a first measurement result of the at least one target cell; the measurement result of the serving cell includes: a first measurement result of the serving cell.

And performing cell switching on the UE according to a measurement result obtained by measuring the specific reference signal of the cell, and actually selecting a target cell for the UE on the basis of ensuring the coverage of the common channel of each target cell, thereby better ensuring the coverage of the common channel of the target cell after switching.

The embodiment also provides a cell switching method. Fig. 4 is a flowchart of another cell handover method according to a third embodiment of the present invention. Optionally, the reference signal resources corresponding to each target cell and the serving cell as described above include: at least one set of user specific reference signal resources.

The user-specific reference signal resource may be, for example, a CSI-RS resource, a UE-RS resource, or any other user-specific reference signal resource. Different UEs in the same cell have different reference signal resources.

As shown in fig. 4, the step 102 of measuring the channel quality of the at least one target cell according to the reference signal resource includes:

step 401, measuring the channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell.

step 402, measuring the channel quality of the serving cell according to at least one set of user-specific reference signal resources corresponding to the serving cell, and obtaining a second measurement result of the serving cell.

The measurement result of the at least one target cell includes: a second measurement result of the at least one target cell; the measurement result of the serving cell includes: a second measurement result of the serving cell. Different UE has different reference signals, so the target cell with the optimal channel quality corresponding to the UE can be obtained by measuring the channel quality according to the specific reference signal of the user, and the optimal downtilt wave beam of the cell can be selected for the UE according to the different precoding information because different reference signal resources respectively correspond to one piece of precoding information.

In the scheme of this embodiment, the common channel coverage of the target cell after the UE is switched can be better ensured by measuring the cell channel quality of the cell specific reference signal, and the switched optimal downtilt beam is selected for the UE by measuring the user specific reference signal resource.

Example four

The embodiment also provides a cell switching method. Fig. 5 is a flowchart of a cell switching method according to a fourth embodiment of the present invention. Optionally, the reference signal resources corresponding to each target cell and the serving cell further include: at least one set of user specific reference signal resources;

as shown in fig. 5, the step 102 of measuring the channel quality of the at least one target cell according to the reference signal resource further includes:

step 501, measuring the channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell.

The above measuring the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell further includes:

step 502, measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell, and obtaining a second measurement result of the serving cell.

The measurement result of the at least one target cell includes: a first measurement result and a second measurement result of the at least one target cell; the measurement result of the serving cell includes: a first measurement result and a second measurement result of the serving cell.

On the basis of the foregoing embodiment, step 103 in the foregoing embodiment sends the obtained measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, which specifically includes:

In this embodiment, the sending of the measurement result is performed according to a preset event triggering condition, that is, the periodic sending of the measurement result is triggered and ended according to whether the triggering condition of the preset event is satisfied.

The preset event trigger condition as described above includes: a same system event trigger condition or a different system event trigger condition.

Specifically, the same system refers to a communication system in which the serving cell base station and the target cell base station have the same type.

In this embodiment, the event trigger condition of the same system includes any one of the following five event trigger conditions:

the first event triggering condition is that a first measurement result of the serving cell is greater than or equal to a first preset threshold, and a second measurement result of the serving cell is greater than or equal to a second preset threshold.

The second event triggering condition is that the first measurement result of the serving cell is smaller than the first preset threshold, or the second measurement result of the serving cell is smaller than the second preset threshold.

A third event triggering condition that the first measurement result of the at least one target cell is greater than or equal to the first measurement result of the serving cell and greater than or equal to the first preset threshold; the second measurement result of the serving cell is greater than or equal to the second preset threshold.

The fourth event triggering condition is that the first measurement result of the at least one target cell is greater than or equal to the first preset threshold, and the second measurement result of the at least one target cell is greater than or equal to the second preset threshold.

A fifth event triggering condition that the first measurement result of the at least one target cell is greater than or equal to the first preset threshold, and the second measurement result of the at least one target cell is greater than or equal to the second preset threshold; the first measurement result of the serving cell is smaller than a third preset threshold, or the second measurement result of the serving cell is smaller than a fourth preset threshold.

In particular, the first event trigger condition includes an access condition and a leave condition. The first measurement result of the serving cell may be denoted as Ms₁The second measurement result is denoted as Ms₂The first predetermined threshold is denoted as Thresh₁The second predetermined threshold is denoted as Thresh₂。

Therefore, the entry condition of the first event trigger condition can be expressed by the following formula (2):

Ms₁≥Thresh₁and Ms₂≥Thresh₂ (2)；

the leaving condition of the first event trigger condition can be expressed by the following formula (3):

Ms₁＜Thresh₁or Ms₂＜Thresh₂ (3).

in this embodiment, the first event triggering condition may also be compared with the first preset threshold and the second preset threshold by a difference between the first measurement result and the second measurement result of the serving cell and a preset cell reselection hysteresis parameter. The cell reselection Hysteresis (hystersis) parameter, denoted Hys.

Correspondingly, the above formula (2) can also be expressed as the following formula (4):

Ms₁-Hys≥Thresh₁and Ms₂-Hys≥Thresh₂ (4)；

the above formula (3) can be expressed as the following formula (5):

Ms₁-Hys＜Thresh₁or Ms₂-Hys＜Thresh₂ (5)。

it should be noted that, in this embodiment, the cell reselection hysteresis parameter compared with the first measurement result may also be different from the cell reselection hysteresis parameter compared with the second measurement result. If different, each can be represented as Hys₁And Hys₂。

In the present embodiment, the first to fifth event trigger conditions are event conditions arranged in order of event priority. The leaving condition of the event trigger condition of the previous stage is the access condition of the subsequent event trigger condition. Specifically, if the UE determines that the UE corresponds to the first event trigger condition according to the measurement result obtained by the measurement, the UE periodically sends the measurement result to the serving cell base station by using an event trigger sending method according to the first event trigger condition. And if the measurement result does not correspond to the first event trigger condition, continuously judging whether the measurement result belongs to a second event trigger condition.

Preferably, the inter-system event triggering condition includes any one of:

a seventh event triggering condition, where a first measurement result of the at least one target cell is greater than or equal to the first preset threshold, and a second measurement result of the serving cell is greater than or equal to the second preset threshold.

In the solution of this embodiment, the above embodiment is further specifically limited by the specific sending manner of the measurement result, so that the UE can be better ensured to perform cell handover.

It should be noted that, in the scheme of this embodiment, the UE may also directly perform periodic transmission according to a preset period.

EXAMPLE five

The embodiment of the invention also provides a cell switching method. Fig. 6 is a flowchart of a cell switching method according to a fifth embodiment of the present invention. The method is performed by a serving cell base station. The serving cell base station may be a macro station or a micro station. If the serving cell is a macro station, and correspondingly, the target cell base station of the UE may be a micro station, then the cell handover method actually is to handover the UE from the macro cell served by the macro station to the micro cell served by the micro station. As shown in fig. 6, the method of this embodiment specifically includes the following steps:

step 601, receiving a measurement result sent by the UE and an identifier of a reference signal resource corresponding to the measurement result.

Wherein the measurement result comprises: and the UE measures the channel quality of at least one target cell according to the reference signal resources sent by the base station of the at least one target cell. The reference signal resource includes: the reference signal resources corresponding to the at least one target cell, each target cell corresponding to at least two sets of reference signal resources, each set of reference signal resources corresponding to one precoding information.

Specifically, the UE has at least one target cell, one set of reference signal resources corresponds to one precoding information, and each target cell configures at least two sets of reference signal resources, so that the UE performs channel quality measurement on coverage ranges corresponding to at least two downtilts in a common channel coverage range of each target cell according to the corresponding reference signal resources. The reference signal resource of each target cell may be different weighting factors applied to the same type of reference signal, and may correspond to different precoding information, or different weighting factors applied to different types of reference signals, and may correspond to different precoding information.

In the embodiment of the present invention, the transmitting antennas of the serving cell base station and each target cell base station may be two-dimensional antennas. In the system with the two-dimensional antenna, each precoding information corresponds to a set of weighting factors of each row of antenna elements of the two-dimensional antenna.

The actual measurement of the channel quality of the at least one target cell by the UE according to the reference signal resources corresponding to the at least one target cell is to measure the channel quality of each target cell according to at least two sets of reference signal resources corresponding to each target cell. Then, in the measurement results, one target cell corresponds to at least two sets of measurement results. The identifier of the reference signal resource corresponding to the measurement result indicates an identifier of a reference signal resource used for obtaining the measurement result, and the identifier of the reference signal resource may be an identifier of the reference signal resource in at least two sets of reference signal resources corresponding to a target cell. The identification corresponds to different weighting factors used and may also correspond to the lower precoding information.

Step 602, determining whether the UE performs cell handover according to the measurement result, and if so, sending a handover request message to the at least one target cell base station.

Determining that the UE can perform cell handover according to the measurement result, where the measurement result may be obtained by comparing a channel quality value corresponding to at least one target cell of the UE with a preset threshold, and if a target cell whose channel quality is greater than or equal to the preset threshold exists in the measurement result, the UE may perform cell handover. The preset threshold may be configured according to an average value of channel quality of a cell in which the UE is located when the UE performs normal communication in different scenarios, for example.

Determining that the UE performs cell switching according to the measurement result, or comparing a channel quality corresponding to at least one target cell of the UE with a channel quality of a cell currently served by the UE according to the measurement result, and if the channel quality in the measurement result is greater than or equal to the channel quality of the cell currently served by the UE, the UE may perform cell switching.

The handover request message sent by the serving cell base station to each target cell base station includes: and the UE measures at least one of the obtained channel quality corresponding to each target cell, the UE requesting switching and the identification or precoding information of the reference signal resource adopted after switching.

Step 603, performing cell handover on the UE according to the handover request response message returned by the at least one target cell base station.

After the at least one target cell actually receives the handover request message sent by the serving cell base station, each target cell base station determines whether the target cell performs cell handover of the UE according to the channel quality of the target cell base station and the channel quality measured by the UE corresponding to the target cell in the handover request message. And the target cell base station performing cell switching on the UE returns a switching request response message to the serving cell base station, wherein the switching request response message indicates whether cell switching is performed or not and the identifier of the switched reference signal resource. And the serving cell base station switches the UE to the target cell according to the received switching response message, and the target cell sends the reference signal resource corresponding to the identifier to the UE.

In the solution of this embodiment, the channel quality of at least one target cell of the UE is measured according to multiple sets of reference signal resources corresponding to different precoding information configured for the at least one target cell, and whether the UE performs handover is determined according to the obtained measurement result, if yes, the UE is handed over to the target cell and the corresponding precoding information. Each set of reference signal resource corresponds to one precoding information, which means that each set of reference signal resource corresponds to one downtilt angle in the coverage range of the common channel of the target cell, and each target cell corresponds to at least two sets of reference signal resources, so that cell switching is performed on the UE according to the reference signal resources, the beam switched by the UE can be in the coverage beam of the common channel of the target cell, and the coverage range of the common channel of the target cell after cell switching is performed by the UE can be improved.

EXAMPLE six

The embodiment also provides a cell switching method. Fig. 7 is a flowchart of a cell switching method according to a sixth embodiment of the present invention. As shown in fig. 7, before transmitting the reference signal resource to the UE in step 601 in the above embodiment, the method further includes:

step 701, notifying the UE of the number of reference signal resources of each target cell and the configuration information corresponding to each set of reference signal resources.

The specific notification manner may be, for example, notification by a broadcast manner, or may be other manners, and the scheme of this embodiment is not limited herein.

The configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

And the serving cell base station sends the configuration information to the UE so that the UE receives the reference signal resources corresponding to different precoding information sent by the target cell base station according to the configuration information.

In the foregoing embodiment, each set of reference signal resources corresponds to a measurement configuration, where the measurement configuration includes: the activated starting system frame number SFN, subframe number, measurement period, measurement interval, etc. are measured.

Further, the measurement result as described above is a result after the UE performs time domain filtering.

Specifically, after the UE measures the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource, the UE needs to perform time-domain filtering on the obtained measurement result to obtain a stable measurement result.

Preferably, the method according to the above scheme further comprises:

step 702, sending a reference signal resource corresponding to a serving cell to the UE, where the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, wherein each set of reference signal resources corresponds to one piece of precoding information.

Further, in the foregoing embodiment, the determining, in step 602, whether the UE performs cell handover according to the measurement result includes:

step 703, respectively determining the channel quality of the at least one target cell and the channel quality of the serving cell according to the measurement result;

step 704, determining that the UE performs cell switching if the channel quality of the at least one target cell is greater than the channel quality of the serving cell; or,

Specifically, the serving cell base station determines whether the UE performs cell handover actually is to determine whether a measurement result of the target cell base station is greater than channel quality of the serving cell base station, and if so, determines that the UE can perform cell handover.

Further, in the foregoing solution, the step 602 of sending the handover request message to the at least one target cell base station specifically includes:

step 705, sending the handover request message to the at least one target cell base station over an X2 air interface.

Correspondingly, the handover request response message is a message sent by the at least one target cell base station over the X2 air interface.

Preferably, the measurement result is at least one of CQI information, RSRP information, RSRQ information, and RSSI information.

Further, the reference signal resources corresponding to each target cell and the serving cell as described above include: at least one set of cell-specific reference signal resources.

Correspondingly, the measurement result comprises: a first measurement result of the at least one target cell and a first measurement result of the serving cell; wherein, the first measurement result of the at least one target cell is a result of the UE measuring the channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell; the first measurement result of the serving cell is a result of the UE measuring the channel quality of the serving cell according to the at least one set of cell-specific reference signal resources corresponding to the serving cell.

Optionally, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of user specific reference signal resources;

correspondingly, the measurement result comprises: a second measurement result of the at least one target cell and a second measurement result of the serving cell; wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of UE-specific reference signal resources corresponding to the serving cell.

Preferably, the reference signal resources corresponding to each target cell and the serving cell further include: at least one set of user specific reference signal resources.

Correspondingly, the measurement result further includes: a second measurement result of the at least one target cell and a second measurement result of the serving cell. Wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of UE-specific reference signal resources corresponding to the serving cell.

Preferably, the measurement result is sent by the UE according to a preset event trigger condition.

Specifically, the preset event trigger condition may be, for example, an explanation of the event trigger condition described in the above embodiment, and is not described herein again.

EXAMPLE seven

The embodiment also provides a cell switching method. The method is performed by a target cell base station, which may be a base station of a cell neighboring a serving cell where the UE is located, and may be a macro station or a base station. Fig. 8 is a flowchart of a cell handover method according to a seventh embodiment of the present invention. As shown in fig. 6, the method includes the following steps:

step 801, receiving a handover request message sent by a serving cell base station, where the handover request message includes: UE requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result; the measurement results include: the UE measures channel quality of at least one target cell of the UE.

The reference signal resource includes: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information.

Step 802, determining whether the UE performs cell handover according to the measurement result.

Step 803, if yes, sending a handover request response message to the serving cell base station, so that the serving cell base station performs cell handover on the UE according to the handover request response message.

The embodiment is a method embodiment of a target cell base station side corresponding to the embodiment described above, and the specific implementation process and beneficial effects thereof are similar to those of the embodiment described above, and are not described herein again.

Example eight

The embodiment also provides a cell switching method. Fig. 9 is a flowchart of a cell switching method according to an eighth embodiment of the present invention. As shown in fig. 9, in the present embodiment, the determining whether the UE performs cell handover according to the measurement result in step 802 specifically includes:

step 901, determining the precoding information after the UE is switched or the reference signal resource identifier corresponding to the precoding information according to the reference signal resource identifier corresponding to the measurement result, the channel quality measurement result of the UE and the reference signal resource identifier corresponding to the reference signal resource.

Here, the own channel quality measurement result is a channel quality measurement result of the target cell measured by any UE in the target cell.

Correspondingly, the step 803 of sending the handover request response message to the serving cell base station includes:

step 902, sending the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the precoding information or the reference signal resource identifier corresponding to the precoding information.

Preferably, the handover request message is a message sent by the serving cell base station over an X2 air interface;

the step 902 of sending the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message includes:

Further, the reference signal resource corresponding to each target cell includes: at least one set of cell-specific reference signal resources;

correspondingly, the measurement result comprises: a first measurement result of the at least one target cell; the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell-specific reference signal resources corresponding to each target cell.

Optionally, the reference signal resource corresponding to each target cell includes: at least one set of user specific reference signal resources;

Preferably, the reference signal resource corresponding to each target cell further includes: at least one set of user specific reference signal resources;

Further, in the step 901, determining the precoding information switched by the UE or the reference signal resource identifier corresponding to the precoding information according to the reference signal resource identifier corresponding to the measurement result, the result of the channel measurement of the UE and the corresponding reference signal resource identifier, specifically includes:

determining first precoding information after the UE is switched or a reference signal resource identifier corresponding to the first precoding information according to the reference signal resource identifier corresponding to the first measurement result, the channel quality result of the UE and the corresponding reference signal resource identifier;

and determining second precoding information after the UE is switched or a reference signal resource identifier corresponding to the second precoding information according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier.

Correspondingly, the sending the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message in step 902 specifically includes:

and sending the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the second precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information.

In this embodiment, on the basis of the above scheme, the first precoding information after the UE is switched or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the second precoding information are determined according to the first measurement result and the second measurement result corresponding to each set of reference signal resource, and sending the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information selected by the target cell to the serving cell base station, and selecting the optimal precoding information or the reference signal resource identifier corresponding to the precoding information from the serving cell base station, and switching the UE to a downtilt corresponding to the optimal precoding information of the target cell.

Example nine

The embodiment of the invention also provides a cell switching method. Fig. 10 is a flowchart of a cell handover method according to a ninth embodiment of the present invention. The present embodiment is explained by specific examples. As shown in fig. 10, the method includes the following:

1001, a serving cell base station sends the number of reference signal resources of each target cell and configuration information of each set of reference signal resources to UE in a broadcast mode; wherein the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

The reference signal resources include at least one target cell and reference signal resources corresponding to the serving cell, each target cell corresponds to two types of reference signal resources, and the serving cell corresponds to two types of reference signal resources. Wherein, one is CRS resource, and the other is CSI-RS resource. Each set of reference signal resources corresponds to one precoding information.

Step 1002, the serving cell base station and the target cell base station transmit the reference signal resource to the UE in a time division manner.

Step 1003, the UE measures the channel quality of the at least one target cell and the serving cell according to the reference signal resource and the measurement configuration corresponding to the reference signal resource at the UE side.

The measurement configuration corresponding to the reference signal resource is actually the measurement configuration corresponding to each set of reference signal resources. The measurement configuration includes: the activated starting SFN, subframe number, measurement period, measurement interval, etc. are measured.

Step 1004, the UE sends the obtained measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station.

The measurement results include first measurement results of the at least one target cell and the serving cell, and second measurement results of the at least one target cell and the serving cell.

Step 1005, the serving cell base station determines whether the UE performs cell switching according to the channel quality measurement result corresponding to the at least one target cell and the channel quality measurement result corresponding to the serving cell.

Step 1006, if yes, the serving cell base station sends a handover request message to the at least one target cell over an X2 air interface, where the handover request message includes the UE requesting handover, the measurement result, and an identifier of a reference signal resource corresponding to the measurement result.

Step 1007, the target cell base station determines, according to the first measurement result in the received handover request message, the first precoding information used for handover of the UE or the reference signal resource identifier corresponding to the first precoding information, and determines, according to the second measurement result in the handover request message, the second precoding information used for handover of the UE user or the reference signal resource identifier corresponding to the second precoding information.

Step 1008, the target cell base station sends the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the first precoding information to the serving cell base station through an X2 air interface, where the reference signal resource identifiers are carried in a handover request response message.

Step 1009, the serving cell base station selects, according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information of the handover request response message, one piece of precoding information from the reference signal resource identifier corresponding to the first precoding information or the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information, in combination with the result of measuring the channel quality of the at least one target cell.

Step 1010, the serving cell base station serves the cell after the UE is switched according to the selected precoding information.

In this embodiment, the above embodiments are explained by specific examples, and the beneficial effects thereof are similar to those of the above embodiments and are not described herein again.

Example ten

The embodiment also provides the UE. Fig. 11 is a schematic structural diagram of a UE according to a tenth embodiment of the present invention. As shown in fig. 11, the UE 1100 includes:

a receiving module 1101, configured to receive a reference signal resource sent by at least one target cell base station. Wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information.

A measuring module 1102, configured to measure the channel quality of the at least one target cell according to the reference signal resource, and obtain a measurement result and an identifier of the reference signal resource corresponding to the measurement result.

A sending module 1103, configured to send the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station, so that the serving cell base station determines whether the UE performs cell handover according to the measurement result, and if so, the serving cell base station sends a handover request message to the at least one target cell base station, and performs cell handover on the UE according to a handover request response message returned by the at least one target cell base station.

Further, the receiving module 1101 is further configured to receive, before receiving the reference signal resource sent by the at least one target cell base station, the number of the reference signal resources of each target cell and the configuration information corresponding to each set of the reference signal resources, where the number of the reference signal resources of each target cell is sent by the serving cell base station. Wherein, each set of reference signal resource corresponds to a configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

Based on the above scheme, the receiving module 1101 is further configured to receive the at least two sets of reference signal resources sent by the at least one target cell base station in a time division manner.

Preferably, each set of reference signal resources in the above scheme corresponds to one measurement configuration; the measurement configuration includes: and measuring the activated initial system frame number SFN, the subframe number, the measurement period and the measurement interval.

The measuring module 1102 is further configured to measure the channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

Further, the UE 1100 as described in the above scheme further includes:

a filtering module, configured to perform time-domain filtering on the measurement result before the sending module 1103 sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to update the measurement result.

On the basis of any of the above schemes, the receiving module 1101 is further configured to receive a reference signal resource corresponding to the serving cell and sent by the serving cell base station; wherein, the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, each set of reference signal resources corresponding to one precoding information.

Correspondingly, the measuring module 1102 is further configured to measure the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell before the sending module 1103 sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to obtain the measurement result of the serving cell.

Preferably, as in the above solution, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

On the basis of the above scheme, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of cell-specific reference signal resources.

The measuring module 1102 is further configured to measure the channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of cell-specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell.

the measuring module 1102 is further configured to measure the channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell to obtain a second measurement result of the serving cell.

Optionally, the reference signal resources corresponding to each target cell and the serving cell in the above scheme further include: at least one set of user specific reference signal resources;

Preferably, the sending module 1103 is further configured to send the measurement result to the serving cell base station according to a preset event trigger condition.

The UE provided in this embodiment may implement the cell switching method described in any of the first to fourth embodiments, and its specific implementation process and beneficial effects are similar to those of the foregoing embodiments and are not described herein again.

EXAMPLE eleven

The embodiment also provides a base station. Fig. 12 is a schematic structural diagram of a base station according to an eleventh embodiment of the present invention. As shown in fig. 12, the base station 1200 includes:

a receiving module 1201, configured to receive a measurement result sent by a UE and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resource includes: the reference signal resources corresponding to the at least one target cell, each target cell corresponding to at least two sets of reference signal resources, each set of reference signal resources corresponding to one precoding information.

A determining module 1202, configured to determine whether the UE performs cell handover according to the measurement result.

A sending module 1203, configured to send a handover request message to the at least one target cell base station if it is determined that the UE performs cell handover according to the measurement result.

A switching module 1204, configured to perform cell switching on the UE according to the switching request response message returned by the at least one target cell base station.

Further, in the above scheme, the sending module 1203 is further configured to notify the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources to the UE before the receiving module 1201 receives the measurement result sent by the UE and the identifier of the reference signal resources corresponding to the measurement result, so that the UE receives the reference signal resources corresponding to each target cell according to the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources. Wherein, the configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

Preferably, in the above scheme, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

Further, the measurement result is a result after the UE performs time domain filtering.

On the basis of any of the foregoing schemes, the sending module 1203 is further configured to send a reference signal resource corresponding to a serving cell to the UE; wherein, the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to one precoding information.

Further, the determining module 1202 is further configured to determine, according to the measurement result, the channel quality of the at least one target cell and the channel quality of the serving cell respectively; if the channel quality of the at least one target cell is greater than the channel quality of the serving cell, determining that the UE performs cell switching; or, if the difference between the channel quality of the at least one target cell and the channel quality of the serving cell is greater than a preset threshold, determining that the UE performs cell switching.

On the basis of the above scheme, the sending module 1203 is further configured to send the handover request message to the at least one target cell base station over an X2 air interface;

correspondingly, the handover request message is a message sent by the at least one target cell base station over the X2 air interface.

Preferably, in the above scheme, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal indicator strength RSSI information.

Further, in the above embodiment, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of cell-specific reference signal resources;

correspondingly, the measurement result comprises: the first measurement result of the at least one target cell and the first measurement result of the serving cell. Wherein, the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell specific reference signal resources corresponding to each target cell; the first measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of cell-specific reference signal resources corresponding to the serving cell.

correspondingly, the measurement result comprises: a second measurement result of the at least one target cell and a second measurement result of the serving cell. Wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of UE-specific reference signal resources corresponding to the serving cell.

Further, the reference signal resources corresponding to each target cell and the serving cell further include: at least one set of user specific reference signal resources;

correspondingly, the measurement result further includes: a second measurement result of the at least one target cell and a second measurement result of the serving cell. Wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of user-specific reference signal resources corresponding to the serving cell.

The base station provided in this embodiment is a serving cell base station, and the cell handover method according to any one of the fifth embodiment or the sixth embodiment may be implemented.

Example twelve

The embodiment also provides a base station. Fig. 13 is a schematic structural diagram of a base station according to a twelfth embodiment of the present invention. As shown in fig. 13, the base station 1300 includes:

a receiving module 1301, configured to receive a handover request message sent by a serving cell base station. Wherein the handover request message includes: UE requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resource includes: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information.

A determining module 1302, configured to determine whether the UE performs cell handover according to the measurement result.

A sending module 1303, configured to send a handover request response message to the serving cell base station, so that the serving cell base station performs cell handover on the UE according to the handover request response message.

Further, the determining module 1302 is further configured to determine precoding information after the UE is switched or a reference signal resource identifier corresponding to the precoding information according to the identifier of the reference signal resource corresponding to the measurement result, the channel quality measurement result of the UE and the identifier of the corresponding reference signal resource;

the sending module 1303 is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the precoding information or the reference signal resource identifier corresponding to the precoding information.

the sending module 1303 is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the X2 air interface, where the reference signal resource identifier is carried in the handover request response message.

On the basis of the above scheme, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

On the basis of any of the above schemes, the reference signal resource corresponding to each target cell includes: at least one set of cell-specific reference signal resources;

Further, the reference signal resource corresponding to each target cell further includes: at least one set of user specific reference signal resources;

Preferably, the sending module 1303 is further configured to determine, according to the reference signal resource identifier corresponding to the first measurement result, the channel quality result of the UE and the corresponding reference signal resource identifier, the first precoding information after the UE is switched or the reference signal resource identifier corresponding to the first precoding information; and determining second precoding information after the UE is switched or a reference signal resource identifier corresponding to the second precoding information according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier.

The sending module 1303 is further configured to send the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the first precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information.

The base station provided in this embodiment is a target cell base station, and the cell handover method according to any one of the seventh embodiment and the eighth embodiment may be implemented.

EXAMPLE thirteen

The embodiment also provides the UE. Fig. 14 is a schematic structural diagram of a UE according to a thirteenth embodiment of the present invention. As shown in fig. 14, the UE 1400 includes: a receiver 1401, a processor 1402, and a transmitter 1403;

the receiver 1401 is configured to receive a reference signal resource transmitted by at least one target cell base station; wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information.

A processor 1402, configured to measure the channel quality of the at least one target cell according to the reference signal resource, and obtain a measurement result and an identifier of the reference signal resource corresponding to the measurement result.

A transmitter 1403, configured to send the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station, so that the serving cell base station determines whether the UE performs cell handover according to the measurement result, and if so, the serving cell base station sends a handover request message to the at least one target cell base station, and performs cell handover on the UE according to a handover request response message returned by the at least one target cell base station.

Further, the receiver 1401 is further configured to receive, before receiving the reference signal resource sent by the at least one target cell base station, the number of the reference signal resources of each target cell and the configuration information corresponding to each set of the reference signal resources, which are sent by the serving cell base station. Wherein, each set of reference signal resource corresponds to a configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

On the basis of the above scheme, the receiver 1401 is further configured to receive the at least two sets of reference signal resources that are sent by the at least one target cell base station in a time division manner.

Preferably, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

the processor 1402 is further configured to measure a channel quality of the at least one target cell according to the measurement configuration corresponding to the reference signal resource.

Further, the processor 1402 is further configured to perform time-domain filtering on the measurement result before the transmitter 1403 sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to update the measurement result.

On the basis of the above scheme, the receiver 1401 is further configured to receive a reference signal resource corresponding to the serving cell and transmitted by the serving cell base station; wherein, the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, wherein each set of reference signal resources corresponds to one piece of precoding information;

the processor 1402 is further configured to measure the channel quality of the serving cell according to the reference signal resource corresponding to the serving cell before the transmitter 1403 sends the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, so as to obtain the measurement result of the serving cell.

Preferably, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal strength indicator RSSI information.

Further, the reference signal resources corresponding to each target cell and the serving cell include: at least one set of cell-specific reference signal resources;

a processor 1402, further configured to measure channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of cell-specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell.

a processor 1402, further configured to measure channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell to obtain a second measurement result of the serving cell.

the processor 1402 is further configured to measure channel quality of the at least one target cell according to the at least one set of user-specific reference signal resources corresponding to each target cell, respectively, to obtain a second measurement result of the at least one target cell; and measuring the channel quality of the serving cell according to the at least one set of user-specific reference signal resources corresponding to the serving cell to obtain a second measurement result of the serving cell.

Preferably, the transmitter 1403 is further configured to transmit the measurement result to the serving cell base station according to a preset event trigger condition.

Example fourteen

The embodiment also provides a base station. Fig. 15 is a schematic structural diagram of a base station according to a fourteenth embodiment of the present invention. As shown in fig. 15, the base station 1500 includes: a receiver 1501, a processor 1502, and a transmitter 1503;

the receiver 1501 is configured to receive a measurement result sent by the UE and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resource includes: the reference signal resources corresponding to the at least one target cell, each target cell corresponding to at least two sets of reference signal resources, each set of reference signal resources corresponding to one precoding information;

a processor 1502 configured to determine whether the UE performs cell handover according to the measurement result;

a transmitter 1503, configured to send a handover request message to the at least one target cell base station if it is determined that the UE performs cell handover according to the measurement result;

the processor 1502 is further configured to perform cell handover on the UE according to a handover request response message returned by the at least one target cell base station.

Further, the transmitter 1503 is further configured to notify the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources to the UE before the receiver 1501 receives the measurement result sent by the UE and the identifier of the reference signal resource corresponding to the measurement result, so that the UE receives the reference signal resource corresponding to each target cell according to the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources; wherein, the configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

On the basis of the above scheme, preferably, each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

On the basis of the above scheme, the transmitter 1503 is further configured to transmit a reference signal resource corresponding to a serving cell to the UE; wherein, the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to one precoding information;

Further, the processor 1502 is further configured to determine, according to the measurement result, the channel quality of the at least one target cell and the channel quality of the serving cell respectively; if the channel quality of the at least one target cell is greater than the channel quality of the serving cell, determining that the UE performs cell switching; or, if the difference between the channel quality of the at least one target cell and the channel quality of the serving cell is greater than a preset threshold, determining that the UE performs cell switching.

Preferably, the transmitter 1503 is further configured to send the handover request message to the at least one target cell base station over an X2 air interface;

Preferably, the measurement result is at least one of channel quality indicator CQI information, reference signal received power RSRP information, reference signal received quality RSRQ information, and received signal indicator strength RSSI information.

correspondingly, the measurement result comprises: a first measurement result of the at least one target cell and a first measurement result of the serving cell; wherein, the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell specific reference signal resources corresponding to each target cell; the first measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of cell-specific reference signal resources corresponding to the serving cell 0.

correspondingly, the measurement result further includes: a second measurement result of the at least one target cell and a second measurement result of the serving cell; wherein, the second measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of user specific reference signal resources corresponding to each target cell; the second measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of UE-specific reference signal resources corresponding to the serving cell.

Further, the measurement result is sent by the UE according to a preset event trigger condition.

Example fifteen

The embodiment also provides a base station. Fig. 16 is a schematic structural diagram of a base station according to a fifteenth embodiment of the present invention. As shown in fig. 16, the base station 1600 includes: a receiver 1601, a processor 1602, and a transmitter 1603;

the receiver 1601 is configured to receive a handover request message sent by a serving cell base station; wherein the handover request message includes: UE requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resource includes: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to precoding information;

a processor 1602, configured to determine whether the UE performs cell handover according to the measurement result;

a transmitter 1603, configured to send a handover request response message to the serving cell base station, so that the serving cell base station performs cell handover on the UE according to the handover request response message.

Further, the processor 1602 is further configured to determine precoding information after the UE is switched or a reference signal resource identifier corresponding to the precoding information according to the identifier of the reference signal resource corresponding to the measurement result, the channel quality measurement result of the UE and the identifier of the corresponding reference signal resource;

the transmitter 1603 is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the precoding information or the reference signal resource identifier corresponding to the precoding information.

On the basis of the above scheme, the handover request message is a message sent by the serving cell base station over an X2 air interface;

the transmitter 1603 is further configured to send the precoding information or the reference signal resource identifier corresponding to the precoding information to the serving cell base station through the X2 air interface, where the reference signal resource identifier is carried in the handover request response message.

Further, the processor 1602 is further configured to determine the first precoding information after the UE is switched or the reference signal resource identifier corresponding to the first precoding information according to the reference signal resource identifier corresponding to the first measurement result, the channel quality result of the UE and the corresponding reference signal resource identifier; determining second pre-coding information after the UE is switched or a reference signal resource identifier corresponding to the second pre-coding information according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier;

the transmitter 1603 is further configured to send the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the second precoding information or the reference signal resource identifier corresponding to the first precoding information to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first precoding information or the reference signal resource identifier corresponding to the first precoding information and the reference signal resource identifier corresponding to the second precoding information or the second precoding information.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of cell handover, comprising:

receiving reference signal resources sent by at least one target cell base station; wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to one beam;

sending the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station;

the reference signal resources corresponding to each target cell and the serving cell include: at least one set of cell-specific reference signal resources; the cell-specific reference signal resource is a common channel resource;

measuring the channel quality of the serving cell according to the at least one set of cell-specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell;

the reference signal resources corresponding to each target cell and the serving cell further include: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

2. The method of claim 1, wherein before receiving the reference signal resource transmitted by at least one target cell base station, further comprising:

3. The method of claim 1, further comprising:

receiving a reference signal resource corresponding to the serving cell sent by the serving cell base station; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, each set of reference signal resources corresponding to a beam;

correspondingly, before the sending the measurement result and the identifier of the reference signal resource corresponding to the measurement result to the serving cell base station, the method further includes:

4. The method of claim 3, wherein the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Received Power (RSRP) information, Reference Signal Received Quality (RSRQ) information, and Received Signal Strength Indicator (RSSI) information.

5. The method of claim 4, wherein the reference signal resources corresponding to each target cell and the serving cell comprise: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

6. The method of claim 1, wherein the sending the measurement result and the identifier of the reference signal resource corresponding to the measurement result to a serving cell base station comprises:

7. The method of claim 6, wherein the preset event trigger condition comprises: a same system event trigger condition or a different system event trigger condition.

8. The method of claim 7, wherein the system-on event trigger condition comprises any one of:

9. The method of claim 8, wherein the inter-system event triggering condition comprises any one of:

10. A method of cell handover, comprising:

receiving a measurement result sent by User Equipment (UE) and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resources include: each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to one beam;

performing cell switching on the UE according to a switching request response message returned by the at least one target cell base station;

correspondingly, the measurement result comprises: a first measurement result of the at least one target cell and a first measurement result of the serving cell; wherein, the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell-specific reference signal resources corresponding to each target cell; the first measurement result of the serving cell is a result of the UE performing channel quality measurement according to the at least one set of cell specific reference signal resources corresponding to the serving cell;

11. The method of claim 10, wherein before receiving the measurement result sent by the UE and the identifier of the reference signal resource corresponding to the measurement result, the method further comprises:

12. The method according to claim 10 or 11, wherein each set of reference signal resources corresponds to one measurement configuration; the measurement configuration includes: measuring an activated initial system frame number SFN, a subframe number, a measurement period and a measurement interval;

13. The method of claim 12, wherein the measurement result is a result after time-domain filtering performed by the UE.

14. The method of claim 10, further comprising:

sending a reference signal resource corresponding to a serving cell to the UE; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to a beam;

15. The method of claim 14, wherein the determining whether the UE performs cell handover according to the measurement result comprises:

16. The method of claim 10, wherein the sending the handover request message to the at least one target cell base station comprises:

17. The method of claim 10, wherein the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Received Power (RSRP) information, Reference Signal Received Quality (RSRQ) information, and received signal indicator strength (RSSI) information.

18. The method of claim 10, wherein the reference signal resources corresponding to each target cell and serving cell comprise: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

19. The method of claim 10, wherein the measurement result is sent by the UE according to a preset event trigger condition.

20. A method of cell handover, comprising:

receiving a switching request message sent by a serving cell base station; wherein the handover request message includes: the method comprises the steps that UE (user equipment) requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result are identified; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resources include: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to one beam;

sending a switching request response message to the serving cell base station so that the serving cell base station performs cell switching on the UE according to the switching request response message;

the reference signal resource corresponding to each target cell includes: at least one set of cell-specific reference signal resources; the cell-specific reference signal resource is a common channel resource;

correspondingly, the measurement result comprises: a first measurement result of the at least one target cell; the first measurement result of the at least one target cell is a result of the UE performing channel quality measurement according to the at least one set of cell specific reference signal resources corresponding to each target cell;

the reference signal resource corresponding to each target cell further includes: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

21. The method of claim 20, wherein the determining whether the UE performs cell handover according to the measurement result comprises:

determining a beam switched by the UE or a reference signal resource identifier corresponding to the beam according to the identifier of the reference signal resource corresponding to the measurement result, the self channel quality measurement result and the identifier of the corresponding reference signal resource;

and sending the beam or the reference signal resource identifier corresponding to the beam to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the beam or the reference signal resource identifier corresponding to the beam.

22. The method of claim 21, wherein the handover request message is a message sent by the serving cell base station over an X2 air interface;

the sending the beam or the reference signal resource identifier corresponding to the beam to the serving cell base station through the handover request response message includes:

and sending the beam or the reference signal resource identifier corresponding to the beam carried in the handover request response message to the serving cell base station through the X2 air interface.

23. The method of claim 21, wherein the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Received Power (RSRP) information, Reference Signal Received Quality (RSRQ) information, and Received Signal Strength Indicator (RSSI) information.

24. The method according to any of claims 21-23, wherein the reference signal resource corresponding to each target cell comprises: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

25. The method of claim 20, wherein the determining a beam switched by the UE or a reference signal resource identifier corresponding to the beam according to the reference signal resource identifier corresponding to the measurement result, the self channel measurement result, and the corresponding reference signal resource identifier comprises:

determining a first wave beam switched by the UE or a reference signal resource identifier corresponding to the first wave beam according to the reference signal resource identifier corresponding to the first measurement result, the self channel quality result and the corresponding reference signal resource identifier;

determining a reference signal resource identifier corresponding to a second beam or second precoding information after the UE is switched according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier;

sending the precoding information to the serving cell base station via the handover request response message includes:

and sending the reference signal resource identifier corresponding to the first beam or the first beam and the reference signal resource identifier corresponding to the second beam or the first beam to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the reference signal resource identifier corresponding to the first beam or the first beam and the reference signal resource identifier corresponding to the second beam or the second beam.

26. A User Equipment (UE), comprising:

a receiving module, configured to receive a reference signal resource sent by at least one target cell base station; wherein the reference signal resource comprises: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to one beam;

a sending module, configured to send the measurement result and an identifier of a reference signal resource corresponding to the measurement result to a serving cell base station;

the measurement module is further configured to measure the channel quality of the at least one target cell according to the at least one set of cell-specific reference signal resources corresponding to each target cell, respectively, to obtain a first measurement result of the at least one target cell; measuring the channel quality of the serving cell according to the at least one set of cell-specific reference signal resources corresponding to the serving cell to obtain a first measurement result of the serving cell;

27. The UE of claim 26,

the receiving module is further configured to receive, before receiving the reference signal resource sent by the at least one target cell base station, the number of reference signal resources of each target cell and configuration information corresponding to each set of reference signal resources, where the number of reference signal resources of each target cell and the configuration information are sent by the serving cell base station; wherein each set of reference signal resources corresponds to a piece of configuration information, and the configuration information includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

28. The UE of claim 26,

the receiving module is further configured to receive a reference signal resource corresponding to the serving cell sent by the serving cell base station; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources, each set of reference signal resources corresponding to a beam;

29. The UE of claim 28, wherein the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Received Power (RSRP) information, Reference Signal Received Quality (RSRQ) information, and Received Signal Strength Indicator (RSSI) information.

30. The UE of claim 29, wherein the reference signal resources corresponding to each target cell and the serving cell comprise: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

31. The UE of claim 26,

the sending module is further configured to send the measurement result to the serving cell base station according to a preset event trigger condition.

32. The UE of claim 26, wherein the preset event trigger condition comprises: a same system event trigger condition or a different system event trigger condition.

33. The UE of claim 32, wherein the system event trigger condition comprises any one of:

34. The UE of claim 33, wherein the inter-system event trigger condition comprises any one of:

35. A base station, comprising:

a receiving module, configured to receive a measurement result sent by a user equipment UE and an identifier of a reference signal resource corresponding to the measurement result; wherein the measurement result comprises: the UE measures the channel quality of at least one target cell according to reference signal resources sent by at least one target cell base station; the reference signal resources include: each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to one beam;

a switching module, configured to perform cell switching on the UE according to a switching request response message returned by the at least one target cell base station;

36. The base station of claim 35,

the sending module is further configured to notify the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources to the UE before the receiving module receives the measurement result sent by the UE and the identifier of the reference signal resource corresponding to the measurement result, so that the UE receives the reference signal resource corresponding to each target cell according to the number of the reference signal resources of each target cell base station and the configuration information corresponding to each set of reference signal resources; wherein, the configuration information corresponding to each set of reference signal resources includes: at least one of the number of antenna ports, the port number of the antenna ports, the pilot sequence and the time-frequency resource position.

37. The base station of claim 35,

the sending module is further configured to send a reference signal resource corresponding to a serving cell to the UE; wherein the reference signal resource corresponding to the serving cell includes: at least two sets of reference signal resources; each set of reference signal resources corresponds to a beam;

38. The base station of claim 37,

the judging module is further configured to respectively judge the channel quality of the at least one target cell and the channel quality of the serving cell according to the measurement result; if the channel quality of the at least one target cell is greater than the channel quality of the serving cell, determining that the UE performs cell switching; or, if the difference between the channel quality of the at least one target cell and the channel quality of the serving cell is greater than a preset threshold, determining that the UE performs cell switching.

39. The base station of claim 35,

the sending module is further configured to send the handover request message to the at least one target cell base station over an X2 air interface;

40. The base station of claim 35, wherein the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Received Power (RSRP) information, Reference Signal Received Quality (RSRQ) information, and received signal indicator strength (RSSI) information.

41. The base station of claim 40, wherein the reference signal resources corresponding to each target cell and serving cell comprise: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

42. The base station of claim 35, wherein the measurement result is sent by the UE according to a preset event trigger condition.

43. A base station, comprising:

a receiving module, configured to receive a handover request message sent by a serving cell base station; wherein the handover request message includes: the method comprises the steps that UE (user equipment) requesting switching, a measurement result and an identifier of a reference signal resource corresponding to the measurement result are obtained; the measurement results include: a result of the UE measuring channel quality of at least one target cell of the UE; the reference signal resources include: reference signal resources corresponding to the at least one target cell; each target cell corresponds to at least two sets of reference signal resources, and each set of reference signal resources corresponds to one beam;

a sending module, configured to send a handover request response message to the serving cell base station, so that the serving cell base station performs cell handover on the UE according to the handover request response message;

44. The base station of claim 43,

the determining module is further configured to determine precoding information after the UE is switched or a reference signal resource identifier corresponding to the precoding information according to the identifier of the reference signal resource corresponding to the measurement result, the channel quality measurement result of the determining module, and the identifier of the reference signal resource corresponding to the reference signal resource;

45. The base station of claim 44, wherein the handover request message is a message sent by the serving cell base station over an X2 air interface;

the sending module is further configured to send the beam or the reference signal resource identifier corresponding to the beam to the serving cell base station through the X2 air interface, where the reference signal resource identifier is carried in the handover request response message.

46. The base station of claim 44, wherein the measurement result is at least one of Channel Quality Indicator (CQI) information, Reference Signal Received Power (RSRP) information, Reference Signal Received Quality (RSRQ) information, and Received Signal Strength Indicator (RSSI) information.

47. The base station according to any of claims 44-46, wherein the reference signal resource corresponding to each target cell comprises: at least one set of user specific reference signal resources; the user specific reference signal resource is a CSI-RS resource or a UE-RS resource;

48. The base station of claim 43,

the sending module is further configured to determine, according to the reference signal resource identifier corresponding to the first measurement result, the channel quality result of the sending module and the corresponding reference signal resource identifier, the first beam after the UE is switched or the reference signal resource identifier corresponding to the first beam; determining a second wave beam switched by the UE or a reference signal resource identifier corresponding to the second wave beam according to the reference signal resource identifier corresponding to the second measurement result, the self channel quality result and the corresponding reference signal resource identifier;

the sending module is further configured to send the first beam or the reference signal resource identifier corresponding to the first beam and the reference signal resource identifier corresponding to the second beam or the first beam to the serving cell base station through the handover request response message, so that the serving cell base station performs cell handover on the UE according to the first beam or the reference signal resource identifier corresponding to the first beam and the reference signal resource identifier corresponding to the second beam or the second beam.